diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/bios_emulator/x86emu')
| -rw-r--r-- | qemu/roms/u-boot/drivers/bios_emulator/x86emu/debug.c | 463 | ||||
| -rw-r--r-- | qemu/roms/u-boot/drivers/bios_emulator/x86emu/decode.c | 1144 | ||||
| -rw-r--r-- | qemu/roms/u-boot/drivers/bios_emulator/x86emu/ops.c | 5423 | ||||
| -rw-r--r-- | qemu/roms/u-boot/drivers/bios_emulator/x86emu/ops2.c | 1769 | ||||
| -rw-r--r-- | qemu/roms/u-boot/drivers/bios_emulator/x86emu/prim_ops.c | 2442 | ||||
| -rw-r--r-- | qemu/roms/u-boot/drivers/bios_emulator/x86emu/sys.c | 323 |
6 files changed, 0 insertions, 11564 deletions
diff --git a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/debug.c b/qemu/roms/u-boot/drivers/bios_emulator/x86emu/debug.c deleted file mode 100644 index 2fa8050f6..000000000 --- a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/debug.c +++ /dev/null @@ -1,463 +0,0 @@ -/**************************************************************************** -* -* Realmode X86 Emulator Library -* -* Copyright (C) 1991-2004 SciTech Software, Inc. -* Copyright (C) David Mosberger-Tang -* Copyright (C) 1999 Egbert Eich -* -* ======================================================================== -* -* Permission to use, copy, modify, distribute, and sell this software and -* its documentation for any purpose is hereby granted without fee, -* provided that the above copyright notice appear in all copies and that -* both that copyright notice and this permission notice appear in -* supporting documentation, and that the name of the authors not be used -* in advertising or publicity pertaining to distribution of the software -* without specific, written prior permission. The authors makes no -* representations about the suitability of this software for any purpose. -* It is provided "as is" without express or implied warranty. -* -* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, -* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO -* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR -* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF -* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR -* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR -* PERFORMANCE OF THIS SOFTWARE. -* -* ======================================================================== -* -* Language: ANSI C -* Environment: Any -* Developer: Kendall Bennett -* -* Description: This file contains the code to handle debugging of the -* emulator. -* -****************************************************************************/ - -#include <stdarg.h> -#include <common.h> -#include <linux/ctype.h> -#include "x86emu/x86emui.h" - -/*----------------------------- Implementation ----------------------------*/ - -#ifdef DEBUG - -static void print_encoded_bytes(u16 s, u16 o); -static void print_decoded_instruction(void); -static int x86emu_parse_line(char *s, int *ps, int *n); - -/* should look something like debug's output. */ -void X86EMU_trace_regs(void) -{ - if (DEBUG_TRACE()) { - x86emu_dump_regs(); - } - if (DEBUG_DECODE() && !DEBUG_DECODE_NOPRINT()) { - printk("%04x:%04x ", M.x86.saved_cs, M.x86.saved_ip); - print_encoded_bytes(M.x86.saved_cs, M.x86.saved_ip); - print_decoded_instruction(); - } -} - -void X86EMU_trace_xregs(void) -{ - if (DEBUG_TRACE()) { - x86emu_dump_xregs(); - } -} - -void x86emu_just_disassemble(void) -{ - /* - * This routine called if the flag DEBUG_DISASSEMBLE is set kind - * of a hack! - */ - printk("%04x:%04x ", M.x86.saved_cs, M.x86.saved_ip); - print_encoded_bytes(M.x86.saved_cs, M.x86.saved_ip); - print_decoded_instruction(); -} - -static void disassemble_forward(u16 seg, u16 off, int n) -{ - X86EMU_sysEnv tregs; - int i; - u8 op1; - /* - * hack, hack, hack. What we do is use the exact machinery set up - * for execution, except that now there is an additional state - * flag associated with the "execution", and we are using a copy - * of the register struct. All the major opcodes, once fully - * decoded, have the following two steps: TRACE_REGS(r,m); - * SINGLE_STEP(r,m); which disappear if DEBUG is not defined to - * the preprocessor. The TRACE_REGS macro expands to: - * - * if (debug&DEBUG_DISASSEMBLE) - * {just_disassemble(); goto EndOfInstruction;} - * if (debug&DEBUG_TRACE) trace_regs(r,m); - * - * ...... and at the last line of the routine. - * - * EndOfInstruction: end_instr(); - * - * Up to the point where TRACE_REG is expanded, NO modifications - * are done to any register EXCEPT the IP register, for fetch and - * decoding purposes. - * - * This was done for an entirely different reason, but makes a - * nice way to get the system to help debug codes. - */ - tregs = M; - tregs.x86.R_IP = off; - tregs.x86.R_CS = seg; - - /* reset the decoding buffers */ - tregs.x86.enc_str_pos = 0; - tregs.x86.enc_pos = 0; - - /* turn on the "disassemble only, no execute" flag */ - tregs.x86.debug |= DEBUG_DISASSEMBLE_F; - - /* DUMP NEXT n instructions to screen in straight_line fashion */ - /* - * This looks like the regular instruction fetch stream, except - * that when this occurs, each fetched opcode, upon seeing the - * DEBUG_DISASSEMBLE flag set, exits immediately after decoding - * the instruction. XXX --- CHECK THAT MEM IS NOT AFFECTED!!! - * Note the use of a copy of the register structure... - */ - for (i = 0; i < n; i++) { - op1 = (*sys_rdb) (((u32) M.x86.R_CS << 4) + (M.x86.R_IP++)); - (x86emu_optab[op1]) (op1); - } - /* end major hack mode. */ -} - -void x86emu_check_ip_access(void) -{ - /* NULL as of now */ -} - -void x86emu_check_sp_access(void) -{ -} - -void x86emu_check_mem_access(u32 dummy) -{ - /* check bounds, etc */ -} - -void x86emu_check_data_access(uint dummy1, uint dummy2) -{ - /* check bounds, etc */ -} - -void x86emu_inc_decoded_inst_len(int x) -{ - M.x86.enc_pos += x; -} - -void x86emu_decode_printf(char *x) -{ - sprintf(M.x86.decoded_buf + M.x86.enc_str_pos, "%s", x); - M.x86.enc_str_pos += strlen(x); -} - -void x86emu_decode_printf2(char *x, int y) -{ - char temp[100]; - sprintf(temp, x, y); - sprintf(M.x86.decoded_buf + M.x86.enc_str_pos, "%s", temp); - M.x86.enc_str_pos += strlen(temp); -} - -void x86emu_end_instr(void) -{ - M.x86.enc_str_pos = 0; - M.x86.enc_pos = 0; -} - -static void print_encoded_bytes(u16 s, u16 o) -{ - int i; - char buf1[64]; - for (i = 0; i < M.x86.enc_pos; i++) { - sprintf(buf1 + 2 * i, "%02x", fetch_data_byte_abs(s, o + i)); - } - printk("%-20s", buf1); -} - -static void print_decoded_instruction(void) -{ - printk("%s", M.x86.decoded_buf); -} - -void x86emu_print_int_vect(u16 iv) -{ - u16 seg, off; - - if (iv > 256) - return; - seg = fetch_data_word_abs(0, iv * 4); - off = fetch_data_word_abs(0, iv * 4 + 2); - printk("%04x:%04x ", seg, off); -} - -void X86EMU_dump_memory(u16 seg, u16 off, u32 amt) -{ - u32 start = off & 0xfffffff0; - u32 end = (off + 16) & 0xfffffff0; - u32 i; - u32 current; - - current = start; - while (end <= off + amt) { - printk("%04x:%04x ", seg, start); - for (i = start; i < off; i++) - printk(" "); - for (; i < end; i++) - printk("%02x ", fetch_data_byte_abs(seg, i)); - printk("\n"); - start = end; - end = start + 16; - } -} - -void x86emu_single_step(void) -{ - char s[1024]; - int ps[10]; - int ntok; - int cmd; - int done; - int segment; - int offset; - static int breakpoint; - static int noDecode = 1; - - char *p; - - if (DEBUG_BREAK()) { - if (M.x86.saved_ip != breakpoint) { - return; - } else { - M.x86.debug &= ~DEBUG_DECODE_NOPRINT_F; - M.x86.debug |= DEBUG_TRACE_F; - M.x86.debug &= ~DEBUG_BREAK_F; - print_decoded_instruction(); - X86EMU_trace_regs(); - } - } - done = 0; - offset = M.x86.saved_ip; - while (!done) { - printk("-"); - cmd = x86emu_parse_line(s, ps, &ntok); - switch (cmd) { - case 'u': - disassemble_forward(M.x86.saved_cs, (u16) offset, 10); - break; - case 'd': - if (ntok == 2) { - segment = M.x86.saved_cs; - offset = ps[1]; - X86EMU_dump_memory(segment, (u16) offset, 16); - offset += 16; - } else if (ntok == 3) { - segment = ps[1]; - offset = ps[2]; - X86EMU_dump_memory(segment, (u16) offset, 16); - offset += 16; - } else { - segment = M.x86.saved_cs; - X86EMU_dump_memory(segment, (u16) offset, 16); - offset += 16; - } - break; - case 'c': - M.x86.debug ^= DEBUG_TRACECALL_F; - break; - case 's': - M.x86.debug ^= - DEBUG_SVC_F | DEBUG_SYS_F | DEBUG_SYSINT_F; - break; - case 'r': - X86EMU_trace_regs(); - break; - case 'x': - X86EMU_trace_xregs(); - break; - case 'g': - if (ntok == 2) { - breakpoint = ps[1]; - if (noDecode) { - M.x86.debug |= DEBUG_DECODE_NOPRINT_F; - } else { - M.x86.debug &= ~DEBUG_DECODE_NOPRINT_F; - } - M.x86.debug &= ~DEBUG_TRACE_F; - M.x86.debug |= DEBUG_BREAK_F; - done = 1; - } - break; - case 'q': - M.x86.debug |= DEBUG_EXIT; - return; - case 'P': - noDecode = (noDecode) ? 0 : 1; - printk("Toggled decoding to %s\n", - (noDecode) ? "false" : "true"); - break; - case 't': - case 0: - done = 1; - break; - } - } -} - -int X86EMU_trace_on(void) -{ - return M.x86.debug |= DEBUG_STEP_F | DEBUG_DECODE_F | DEBUG_TRACE_F; -} - -int X86EMU_trace_off(void) -{ - return M.x86.debug &= ~(DEBUG_STEP_F | DEBUG_DECODE_F | DEBUG_TRACE_F); -} - -static int x86emu_parse_line(char *s, int *ps, int *n) -{ - int cmd; - - *n = 0; - while (isblank(*s)) - s++; - ps[*n] = *s; - switch (*s) { - case '\n': - *n += 1; - return 0; - default: - cmd = *s; - *n += 1; - } - - while (1) { - while (!isblank(*s) && *s != '\n') - s++; - - if (*s == '\n') - return cmd; - - while (isblank(*s)) - s++; - - *n += 1; - } -} - -#endif /* DEBUG */ - -void x86emu_dump_regs(void) -{ - printk("\tAX=%04x ", M.x86.R_AX); - printk("BX=%04x ", M.x86.R_BX); - printk("CX=%04x ", M.x86.R_CX); - printk("DX=%04x ", M.x86.R_DX); - printk("SP=%04x ", M.x86.R_SP); - printk("BP=%04x ", M.x86.R_BP); - printk("SI=%04x ", M.x86.R_SI); - printk("DI=%04x\n", M.x86.R_DI); - printk("\tDS=%04x ", M.x86.R_DS); - printk("ES=%04x ", M.x86.R_ES); - printk("SS=%04x ", M.x86.R_SS); - printk("CS=%04x ", M.x86.R_CS); - printk("IP=%04x ", M.x86.R_IP); - if (ACCESS_FLAG(F_OF)) - printk("OV "); /* CHECKED... */ - else - printk("NV "); - if (ACCESS_FLAG(F_DF)) - printk("DN "); - else - printk("UP "); - if (ACCESS_FLAG(F_IF)) - printk("EI "); - else - printk("DI "); - if (ACCESS_FLAG(F_SF)) - printk("NG "); - else - printk("PL "); - if (ACCESS_FLAG(F_ZF)) - printk("ZR "); - else - printk("NZ "); - if (ACCESS_FLAG(F_AF)) - printk("AC "); - else - printk("NA "); - if (ACCESS_FLAG(F_PF)) - printk("PE "); - else - printk("PO "); - if (ACCESS_FLAG(F_CF)) - printk("CY "); - else - printk("NC "); - printk("\n"); -} - -void x86emu_dump_xregs(void) -{ - printk("\tEAX=%08x ", M.x86.R_EAX); - printk("EBX=%08x ", M.x86.R_EBX); - printk("ECX=%08x ", M.x86.R_ECX); - printk("EDX=%08x \n", M.x86.R_EDX); - printk("\tESP=%08x ", M.x86.R_ESP); - printk("EBP=%08x ", M.x86.R_EBP); - printk("ESI=%08x ", M.x86.R_ESI); - printk("EDI=%08x\n", M.x86.R_EDI); - printk("\tDS=%04x ", M.x86.R_DS); - printk("ES=%04x ", M.x86.R_ES); - printk("SS=%04x ", M.x86.R_SS); - printk("CS=%04x ", M.x86.R_CS); - printk("EIP=%08x\n\t", M.x86.R_EIP); - if (ACCESS_FLAG(F_OF)) - printk("OV "); /* CHECKED... */ - else - printk("NV "); - if (ACCESS_FLAG(F_DF)) - printk("DN "); - else - printk("UP "); - if (ACCESS_FLAG(F_IF)) - printk("EI "); - else - printk("DI "); - if (ACCESS_FLAG(F_SF)) - printk("NG "); - else - printk("PL "); - if (ACCESS_FLAG(F_ZF)) - printk("ZR "); - else - printk("NZ "); - if (ACCESS_FLAG(F_AF)) - printk("AC "); - else - printk("NA "); - if (ACCESS_FLAG(F_PF)) - printk("PE "); - else - printk("PO "); - if (ACCESS_FLAG(F_CF)) - printk("CY "); - else - printk("NC "); - printk("\n"); -} diff --git a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/decode.c b/qemu/roms/u-boot/drivers/bios_emulator/x86emu/decode.c deleted file mode 100644 index a782b817b..000000000 --- a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/decode.c +++ /dev/null @@ -1,1144 +0,0 @@ -/**************************************************************************** -* -* Realmode X86 Emulator Library -* -* Copyright (C) 1991-2004 SciTech Software, Inc. -* Copyright (C) David Mosberger-Tang -* Copyright (C) 1999 Egbert Eich -* -* ======================================================================== -* -* Permission to use, copy, modify, distribute, and sell this software and -* its documentation for any purpose is hereby granted without fee, -* provided that the above copyright notice appear in all copies and that -* both that copyright notice and this permission notice appear in -* supporting documentation, and that the name of the authors not be used -* in advertising or publicity pertaining to distribution of the software -* without specific, written prior permission. The authors makes no -* representations about the suitability of this software for any purpose. -* It is provided "as is" without express or implied warranty. -* -* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, -* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO -* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR -* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF -* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR -* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR -* PERFORMANCE OF THIS SOFTWARE. -* -* ======================================================================== -* -* Language: ANSI C -* Environment: Any -* Developer: Kendall Bennett -* -* Description: This file includes subroutines which are related to -* instruction decoding and accessess of immediate data via IP. etc. -* -****************************************************************************/ -#include <common.h> -#include "x86emu/x86emui.h" - -/*----------------------------- Implementation ----------------------------*/ - -/**************************************************************************** -REMARKS: -Handles any pending asychronous interrupts. -****************************************************************************/ -static void x86emu_intr_handle(void) -{ - u8 intno; - - if (M.x86.intr & INTR_SYNCH) { - intno = M.x86.intno; - if (_X86EMU_intrTab[intno]) { - (*_X86EMU_intrTab[intno])(intno); - } else { - push_word((u16)M.x86.R_FLG); - CLEAR_FLAG(F_IF); - CLEAR_FLAG(F_TF); - push_word(M.x86.R_CS); - M.x86.R_CS = mem_access_word(intno * 4 + 2); - push_word(M.x86.R_IP); - M.x86.R_IP = mem_access_word(intno * 4); - M.x86.intr = 0; - } - } -} - -/**************************************************************************** -PARAMETERS: -intrnum - Interrupt number to raise - -REMARKS: -Raise the specified interrupt to be handled before the execution of the -next instruction. -****************************************************************************/ -void x86emu_intr_raise( - u8 intrnum) -{ - M.x86.intno = intrnum; - M.x86.intr |= INTR_SYNCH; -} - -/**************************************************************************** -REMARKS: -Main execution loop for the emulator. We return from here when the system -halts, which is normally caused by a stack fault when we return from the -original real mode call. -****************************************************************************/ -void X86EMU_exec(void) -{ - u8 op1; - - M.x86.intr = 0; - DB(x86emu_end_instr();) - - for (;;) { -DB( if (CHECK_IP_FETCH()) - x86emu_check_ip_access();) - /* If debugging, save the IP and CS values. */ - SAVE_IP_CS(M.x86.R_CS, M.x86.R_IP); - INC_DECODED_INST_LEN(1); - if (M.x86.intr) { - if (M.x86.intr & INTR_HALTED) { -DB( if (M.x86.R_SP != 0) { - printk("halted\n"); - X86EMU_trace_regs(); - } - else { - if (M.x86.debug) - printk("Service completed successfully\n"); - }) - return; - } - if (((M.x86.intr & INTR_SYNCH) && (M.x86.intno == 0 || M.x86.intno == 2)) || - !ACCESS_FLAG(F_IF)) { - x86emu_intr_handle(); - } - } - op1 = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++)); - (*x86emu_optab[op1])(op1); - if (M.x86.debug & DEBUG_EXIT) { - M.x86.debug &= ~DEBUG_EXIT; - return; - } - } -} - -/**************************************************************************** -REMARKS: -Halts the system by setting the halted system flag. -****************************************************************************/ -void X86EMU_halt_sys(void) -{ - M.x86.intr |= INTR_HALTED; -} - -/**************************************************************************** -PARAMETERS: -mod - Mod value from decoded byte -regh - Reg h value from decoded byte -regl - Reg l value from decoded byte - -REMARKS: -Raise the specified interrupt to be handled before the execution of the -next instruction. - -NOTE: Do not inline this function, as (*sys_rdb) is already inline! -****************************************************************************/ -void fetch_decode_modrm( - int *mod, - int *regh, - int *regl) -{ - int fetched; - -DB( if (CHECK_IP_FETCH()) - x86emu_check_ip_access();) - fetched = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++)); - INC_DECODED_INST_LEN(1); - *mod = (fetched >> 6) & 0x03; - *regh = (fetched >> 3) & 0x07; - *regl = (fetched >> 0) & 0x07; -} - -/**************************************************************************** -RETURNS: -Immediate byte value read from instruction queue - -REMARKS: -This function returns the immediate byte from the instruction queue, and -moves the instruction pointer to the next value. - -NOTE: Do not inline this function, as (*sys_rdb) is already inline! -****************************************************************************/ -u8 fetch_byte_imm(void) -{ - u8 fetched; - -DB( if (CHECK_IP_FETCH()) - x86emu_check_ip_access();) - fetched = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++)); - INC_DECODED_INST_LEN(1); - return fetched; -} - -/**************************************************************************** -RETURNS: -Immediate word value read from instruction queue - -REMARKS: -This function returns the immediate byte from the instruction queue, and -moves the instruction pointer to the next value. - -NOTE: Do not inline this function, as (*sys_rdw) is already inline! -****************************************************************************/ -u16 fetch_word_imm(void) -{ - u16 fetched; - -DB( if (CHECK_IP_FETCH()) - x86emu_check_ip_access();) - fetched = (*sys_rdw)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP)); - M.x86.R_IP += 2; - INC_DECODED_INST_LEN(2); - return fetched; -} - -/**************************************************************************** -RETURNS: -Immediate lone value read from instruction queue - -REMARKS: -This function returns the immediate byte from the instruction queue, and -moves the instruction pointer to the next value. - -NOTE: Do not inline this function, as (*sys_rdw) is already inline! -****************************************************************************/ -u32 fetch_long_imm(void) -{ - u32 fetched; - -DB( if (CHECK_IP_FETCH()) - x86emu_check_ip_access();) - fetched = (*sys_rdl)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP)); - M.x86.R_IP += 4; - INC_DECODED_INST_LEN(4); - return fetched; -} - -/**************************************************************************** -RETURNS: -Value of the default data segment - -REMARKS: -Inline function that returns the default data segment for the current -instruction. - -On the x86 processor, the default segment is not always DS if there is -no segment override. Address modes such as -3[BP] or 10[BP+SI] all refer to -addresses relative to SS (ie: on the stack). So, at the minimum, all -decodings of addressing modes would have to set/clear a bit describing -whether the access is relative to DS or SS. That is the function of the -cpu-state-varible M.x86.mode. There are several potential states: - - repe prefix seen (handled elsewhere) - repne prefix seen (ditto) - - cs segment override - ds segment override - es segment override - fs segment override - gs segment override - ss segment override - - ds/ss select (in absense of override) - -Each of the above 7 items are handled with a bit in the mode field. -****************************************************************************/ -_INLINE u32 get_data_segment(void) -{ -#define GET_SEGMENT(segment) - switch (M.x86.mode & SYSMODE_SEGMASK) { - case 0: /* default case: use ds register */ - case SYSMODE_SEGOVR_DS: - case SYSMODE_SEGOVR_DS | SYSMODE_SEG_DS_SS: - return M.x86.R_DS; - case SYSMODE_SEG_DS_SS: /* non-overridden, use ss register */ - return M.x86.R_SS; - case SYSMODE_SEGOVR_CS: - case SYSMODE_SEGOVR_CS | SYSMODE_SEG_DS_SS: - return M.x86.R_CS; - case SYSMODE_SEGOVR_ES: - case SYSMODE_SEGOVR_ES | SYSMODE_SEG_DS_SS: - return M.x86.R_ES; - case SYSMODE_SEGOVR_FS: - case SYSMODE_SEGOVR_FS | SYSMODE_SEG_DS_SS: - return M.x86.R_FS; - case SYSMODE_SEGOVR_GS: - case SYSMODE_SEGOVR_GS | SYSMODE_SEG_DS_SS: - return M.x86.R_GS; - case SYSMODE_SEGOVR_SS: - case SYSMODE_SEGOVR_SS | SYSMODE_SEG_DS_SS: - return M.x86.R_SS; - default: -#ifdef DEBUG - printk("error: should not happen: multiple overrides.\n"); -#endif - HALT_SYS(); - return 0; - } -} - -/**************************************************************************** -PARAMETERS: -offset - Offset to load data from - -RETURNS: -Byte value read from the absolute memory location. - -NOTE: Do not inline this function as (*sys_rdX) is already inline! -****************************************************************************/ -u8 fetch_data_byte( - uint offset) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access((u16)get_data_segment(), offset); -#endif - return (*sys_rdb)((get_data_segment() << 4) + offset); -} - -/**************************************************************************** -PARAMETERS: -offset - Offset to load data from - -RETURNS: -Word value read from the absolute memory location. - -NOTE: Do not inline this function as (*sys_rdX) is already inline! -****************************************************************************/ -u16 fetch_data_word( - uint offset) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access((u16)get_data_segment(), offset); -#endif - return (*sys_rdw)((get_data_segment() << 4) + offset); -} - -/**************************************************************************** -PARAMETERS: -offset - Offset to load data from - -RETURNS: -Long value read from the absolute memory location. - -NOTE: Do not inline this function as (*sys_rdX) is already inline! -****************************************************************************/ -u32 fetch_data_long( - uint offset) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access((u16)get_data_segment(), offset); -#endif - return (*sys_rdl)((get_data_segment() << 4) + offset); -} - -/**************************************************************************** -PARAMETERS: -segment - Segment to load data from -offset - Offset to load data from - -RETURNS: -Byte value read from the absolute memory location. - -NOTE: Do not inline this function as (*sys_rdX) is already inline! -****************************************************************************/ -u8 fetch_data_byte_abs( - uint segment, - uint offset) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access(segment, offset); -#endif - return (*sys_rdb)(((u32)segment << 4) + offset); -} - -/**************************************************************************** -PARAMETERS: -segment - Segment to load data from -offset - Offset to load data from - -RETURNS: -Word value read from the absolute memory location. - -NOTE: Do not inline this function as (*sys_rdX) is already inline! -****************************************************************************/ -u16 fetch_data_word_abs( - uint segment, - uint offset) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access(segment, offset); -#endif - return (*sys_rdw)(((u32)segment << 4) + offset); -} - -/**************************************************************************** -PARAMETERS: -segment - Segment to load data from -offset - Offset to load data from - -RETURNS: -Long value read from the absolute memory location. - -NOTE: Do not inline this function as (*sys_rdX) is already inline! -****************************************************************************/ -u32 fetch_data_long_abs( - uint segment, - uint offset) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access(segment, offset); -#endif - return (*sys_rdl)(((u32)segment << 4) + offset); -} - -/**************************************************************************** -PARAMETERS: -offset - Offset to store data at -val - Value to store - -REMARKS: -Writes a word value to an segmented memory location. The segment used is -the current 'default' segment, which may have been overridden. - -NOTE: Do not inline this function as (*sys_wrX) is already inline! -****************************************************************************/ -void store_data_byte( - uint offset, - u8 val) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access((u16)get_data_segment(), offset); -#endif - (*sys_wrb)((get_data_segment() << 4) + offset, val); -} - -/**************************************************************************** -PARAMETERS: -offset - Offset to store data at -val - Value to store - -REMARKS: -Writes a word value to an segmented memory location. The segment used is -the current 'default' segment, which may have been overridden. - -NOTE: Do not inline this function as (*sys_wrX) is already inline! -****************************************************************************/ -void store_data_word( - uint offset, - u16 val) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access((u16)get_data_segment(), offset); -#endif - (*sys_wrw)((get_data_segment() << 4) + offset, val); -} - -/**************************************************************************** -PARAMETERS: -offset - Offset to store data at -val - Value to store - -REMARKS: -Writes a long value to an segmented memory location. The segment used is -the current 'default' segment, which may have been overridden. - -NOTE: Do not inline this function as (*sys_wrX) is already inline! -****************************************************************************/ -void store_data_long( - uint offset, - u32 val) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access((u16)get_data_segment(), offset); -#endif - (*sys_wrl)((get_data_segment() << 4) + offset, val); -} - -/**************************************************************************** -PARAMETERS: -segment - Segment to store data at -offset - Offset to store data at -val - Value to store - -REMARKS: -Writes a byte value to an absolute memory location. - -NOTE: Do not inline this function as (*sys_wrX) is already inline! -****************************************************************************/ -void store_data_byte_abs( - uint segment, - uint offset, - u8 val) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access(segment, offset); -#endif - (*sys_wrb)(((u32)segment << 4) + offset, val); -} - -/**************************************************************************** -PARAMETERS: -segment - Segment to store data at -offset - Offset to store data at -val - Value to store - -REMARKS: -Writes a word value to an absolute memory location. - -NOTE: Do not inline this function as (*sys_wrX) is already inline! -****************************************************************************/ -void store_data_word_abs( - uint segment, - uint offset, - u16 val) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access(segment, offset); -#endif - (*sys_wrw)(((u32)segment << 4) + offset, val); -} - -/**************************************************************************** -PARAMETERS: -segment - Segment to store data at -offset - Offset to store data at -val - Value to store - -REMARKS: -Writes a long value to an absolute memory location. - -NOTE: Do not inline this function as (*sys_wrX) is already inline! -****************************************************************************/ -void store_data_long_abs( - uint segment, - uint offset, - u32 val) -{ -#ifdef DEBUG - if (CHECK_DATA_ACCESS()) - x86emu_check_data_access(segment, offset); -#endif - (*sys_wrl)(((u32)segment << 4) + offset, val); -} - -/**************************************************************************** -PARAMETERS: -reg - Register to decode - -RETURNS: -Pointer to the appropriate register - -REMARKS: -Return a pointer to the register given by the R/RM field of the -modrm byte, for byte operands. Also enables the decoding of instructions. -****************************************************************************/ -u8* decode_rm_byte_register( - int reg) -{ - switch (reg) { - case 0: - DECODE_PRINTF("AL"); - return &M.x86.R_AL; - case 1: - DECODE_PRINTF("CL"); - return &M.x86.R_CL; - case 2: - DECODE_PRINTF("DL"); - return &M.x86.R_DL; - case 3: - DECODE_PRINTF("BL"); - return &M.x86.R_BL; - case 4: - DECODE_PRINTF("AH"); - return &M.x86.R_AH; - case 5: - DECODE_PRINTF("CH"); - return &M.x86.R_CH; - case 6: - DECODE_PRINTF("DH"); - return &M.x86.R_DH; - case 7: - DECODE_PRINTF("BH"); - return &M.x86.R_BH; - } - HALT_SYS(); - return NULL; /* NOT REACHED OR REACHED ON ERROR */ -} - -/**************************************************************************** -PARAMETERS: -reg - Register to decode - -RETURNS: -Pointer to the appropriate register - -REMARKS: -Return a pointer to the register given by the R/RM field of the -modrm byte, for word operands. Also enables the decoding of instructions. -****************************************************************************/ -u16* decode_rm_word_register( - int reg) -{ - switch (reg) { - case 0: - DECODE_PRINTF("AX"); - return &M.x86.R_AX; - case 1: - DECODE_PRINTF("CX"); - return &M.x86.R_CX; - case 2: - DECODE_PRINTF("DX"); - return &M.x86.R_DX; - case 3: - DECODE_PRINTF("BX"); - return &M.x86.R_BX; - case 4: - DECODE_PRINTF("SP"); - return &M.x86.R_SP; - case 5: - DECODE_PRINTF("BP"); - return &M.x86.R_BP; - case 6: - DECODE_PRINTF("SI"); - return &M.x86.R_SI; - case 7: - DECODE_PRINTF("DI"); - return &M.x86.R_DI; - } - HALT_SYS(); - return NULL; /* NOTREACHED OR REACHED ON ERROR */ -} - -/**************************************************************************** -PARAMETERS: -reg - Register to decode - -RETURNS: -Pointer to the appropriate register - -REMARKS: -Return a pointer to the register given by the R/RM field of the -modrm byte, for dword operands. Also enables the decoding of instructions. -****************************************************************************/ -u32* decode_rm_long_register( - int reg) -{ - switch (reg) { - case 0: - DECODE_PRINTF("EAX"); - return &M.x86.R_EAX; - case 1: - DECODE_PRINTF("ECX"); - return &M.x86.R_ECX; - case 2: - DECODE_PRINTF("EDX"); - return &M.x86.R_EDX; - case 3: - DECODE_PRINTF("EBX"); - return &M.x86.R_EBX; - case 4: - DECODE_PRINTF("ESP"); - return &M.x86.R_ESP; - case 5: - DECODE_PRINTF("EBP"); - return &M.x86.R_EBP; - case 6: - DECODE_PRINTF("ESI"); - return &M.x86.R_ESI; - case 7: - DECODE_PRINTF("EDI"); - return &M.x86.R_EDI; - } - HALT_SYS(); - return NULL; /* NOTREACHED OR REACHED ON ERROR */ -} - -/**************************************************************************** -PARAMETERS: -reg - Register to decode - -RETURNS: -Pointer to the appropriate register - -REMARKS: -Return a pointer to the register given by the R/RM field of the -modrm byte, for word operands, modified from above for the weirdo -special case of segreg operands. Also enables the decoding of instructions. -****************************************************************************/ -u16* decode_rm_seg_register( - int reg) -{ - switch (reg) { - case 0: - DECODE_PRINTF("ES"); - return &M.x86.R_ES; - case 1: - DECODE_PRINTF("CS"); - return &M.x86.R_CS; - case 2: - DECODE_PRINTF("SS"); - return &M.x86.R_SS; - case 3: - DECODE_PRINTF("DS"); - return &M.x86.R_DS; - case 4: - DECODE_PRINTF("FS"); - return &M.x86.R_FS; - case 5: - DECODE_PRINTF("GS"); - return &M.x86.R_GS; - case 6: - case 7: - DECODE_PRINTF("ILLEGAL SEGREG"); - break; - } - HALT_SYS(); - return NULL; /* NOT REACHED OR REACHED ON ERROR */ -} - -/**************************************************************************** -PARAMETERS: -scale - scale value of SIB byte -index - index value of SIB byte - -RETURNS: -Value of scale * index - -REMARKS: -Decodes scale/index of SIB byte and returns relevant offset part of -effective address. -****************************************************************************/ -unsigned decode_sib_si( - int scale, - int index) -{ - scale = 1 << scale; - if (scale > 1) { - DECODE_PRINTF2("[%d*", scale); - } else { - DECODE_PRINTF("["); - } - switch (index) { - case 0: - DECODE_PRINTF("EAX]"); - return M.x86.R_EAX * index; - case 1: - DECODE_PRINTF("ECX]"); - return M.x86.R_ECX * index; - case 2: - DECODE_PRINTF("EDX]"); - return M.x86.R_EDX * index; - case 3: - DECODE_PRINTF("EBX]"); - return M.x86.R_EBX * index; - case 4: - DECODE_PRINTF("0]"); - return 0; - case 5: - DECODE_PRINTF("EBP]"); - return M.x86.R_EBP * index; - case 6: - DECODE_PRINTF("ESI]"); - return M.x86.R_ESI * index; - case 7: - DECODE_PRINTF("EDI]"); - return M.x86.R_EDI * index; - } - HALT_SYS(); - return 0; /* NOT REACHED OR REACHED ON ERROR */ -} - -/**************************************************************************** -PARAMETERS: -mod - MOD value of preceding ModR/M byte - -RETURNS: -Offset in memory for the address decoding - -REMARKS: -Decodes SIB addressing byte and returns calculated effective address. -****************************************************************************/ -unsigned decode_sib_address( - int mod) -{ - int sib = fetch_byte_imm(); - int ss = (sib >> 6) & 0x03; - int index = (sib >> 3) & 0x07; - int base = sib & 0x07; - int offset = 0; - int displacement; - - switch (base) { - case 0: - DECODE_PRINTF("[EAX]"); - offset = M.x86.R_EAX; - break; - case 1: - DECODE_PRINTF("[ECX]"); - offset = M.x86.R_ECX; - break; - case 2: - DECODE_PRINTF("[EDX]"); - offset = M.x86.R_EDX; - break; - case 3: - DECODE_PRINTF("[EBX]"); - offset = M.x86.R_EBX; - break; - case 4: - DECODE_PRINTF("[ESP]"); - offset = M.x86.R_ESP; - break; - case 5: - switch (mod) { - case 0: - displacement = (s32)fetch_long_imm(); - DECODE_PRINTF2("[%d]", displacement); - offset = displacement; - break; - case 1: - displacement = (s8)fetch_byte_imm(); - DECODE_PRINTF2("[%d][EBP]", displacement); - offset = M.x86.R_EBP + displacement; - break; - case 2: - displacement = (s32)fetch_long_imm(); - DECODE_PRINTF2("[%d][EBP]", displacement); - offset = M.x86.R_EBP + displacement; - break; - default: - HALT_SYS(); - } - DECODE_PRINTF("[EAX]"); - offset = M.x86.R_EAX; - break; - case 6: - DECODE_PRINTF("[ESI]"); - offset = M.x86.R_ESI; - break; - case 7: - DECODE_PRINTF("[EDI]"); - offset = M.x86.R_EDI; - break; - default: - HALT_SYS(); - } - offset += decode_sib_si(ss, index); - return offset; - -} - -/**************************************************************************** -PARAMETERS: -rm - RM value to decode - -RETURNS: -Offset in memory for the address decoding - -REMARKS: -Return the offset given by mod=00 addressing. Also enables the -decoding of instructions. - -NOTE: The code which specifies the corresponding segment (ds vs ss) - below in the case of [BP+..]. The assumption here is that at the - point that this subroutine is called, the bit corresponding to - SYSMODE_SEG_DS_SS will be zero. After every instruction - except the segment override instructions, this bit (as well - as any bits indicating segment overrides) will be clear. So - if a SS access is needed, set this bit. Otherwise, DS access - occurs (unless any of the segment override bits are set). -****************************************************************************/ -unsigned decode_rm00_address( - int rm) -{ - unsigned offset; - - if (M.x86.mode & SYSMODE_PREFIX_ADDR) { - /* 32-bit addressing */ - switch (rm) { - case 0: - DECODE_PRINTF("[EAX]"); - return M.x86.R_EAX; - case 1: - DECODE_PRINTF("[ECX]"); - return M.x86.R_ECX; - case 2: - DECODE_PRINTF("[EDX]"); - return M.x86.R_EDX; - case 3: - DECODE_PRINTF("[EBX]"); - return M.x86.R_EBX; - case 4: - return decode_sib_address(0); - case 5: - offset = fetch_long_imm(); - DECODE_PRINTF2("[%08x]", offset); - return offset; - case 6: - DECODE_PRINTF("[ESI]"); - return M.x86.R_ESI; - case 7: - DECODE_PRINTF("[EDI]"); - return M.x86.R_EDI; - } - } else { - /* 16-bit addressing */ - switch (rm) { - case 0: - DECODE_PRINTF("[BX+SI]"); - return (M.x86.R_BX + M.x86.R_SI) & 0xffff; - case 1: - DECODE_PRINTF("[BX+DI]"); - return (M.x86.R_BX + M.x86.R_DI) & 0xffff; - case 2: - DECODE_PRINTF("[BP+SI]"); - M.x86.mode |= SYSMODE_SEG_DS_SS; - return (M.x86.R_BP + M.x86.R_SI) & 0xffff; - case 3: - DECODE_PRINTF("[BP+DI]"); - M.x86.mode |= SYSMODE_SEG_DS_SS; - return (M.x86.R_BP + M.x86.R_DI) & 0xffff; - case 4: - DECODE_PRINTF("[SI]"); - return M.x86.R_SI; - case 5: - DECODE_PRINTF("[DI]"); - return M.x86.R_DI; - case 6: - offset = fetch_word_imm(); - DECODE_PRINTF2("[%04x]", offset); - return offset; - case 7: - DECODE_PRINTF("[BX]"); - return M.x86.R_BX; - } - } - HALT_SYS(); - return 0; -} - -/**************************************************************************** -PARAMETERS: -rm - RM value to decode - -RETURNS: -Offset in memory for the address decoding - -REMARKS: -Return the offset given by mod=01 addressing. Also enables the -decoding of instructions. -****************************************************************************/ -unsigned decode_rm01_address( - int rm) -{ - int displacement; - - if (M.x86.mode & SYSMODE_PREFIX_ADDR) { - /* 32-bit addressing */ - if (rm != 4) - displacement = (s8)fetch_byte_imm(); - else - displacement = 0; - - switch (rm) { - case 0: - DECODE_PRINTF2("%d[EAX]", displacement); - return M.x86.R_EAX + displacement; - case 1: - DECODE_PRINTF2("%d[ECX]", displacement); - return M.x86.R_ECX + displacement; - case 2: - DECODE_PRINTF2("%d[EDX]", displacement); - return M.x86.R_EDX + displacement; - case 3: - DECODE_PRINTF2("%d[EBX]", displacement); - return M.x86.R_EBX + displacement; - case 4: { - int offset = decode_sib_address(1); - displacement = (s8)fetch_byte_imm(); - DECODE_PRINTF2("[%d]", displacement); - return offset + displacement; - } - case 5: - DECODE_PRINTF2("%d[EBP]", displacement); - return M.x86.R_EBP + displacement; - case 6: - DECODE_PRINTF2("%d[ESI]", displacement); - return M.x86.R_ESI + displacement; - case 7: - DECODE_PRINTF2("%d[EDI]", displacement); - return M.x86.R_EDI + displacement; - } - } else { - /* 16-bit addressing */ - displacement = (s8)fetch_byte_imm(); - switch (rm) { - case 0: - DECODE_PRINTF2("%d[BX+SI]", displacement); - return (M.x86.R_BX + M.x86.R_SI + displacement) & 0xffff; - case 1: - DECODE_PRINTF2("%d[BX+DI]", displacement); - return (M.x86.R_BX + M.x86.R_DI + displacement) & 0xffff; - case 2: - DECODE_PRINTF2("%d[BP+SI]", displacement); - M.x86.mode |= SYSMODE_SEG_DS_SS; - return (M.x86.R_BP + M.x86.R_SI + displacement) & 0xffff; - case 3: - DECODE_PRINTF2("%d[BP+DI]", displacement); - M.x86.mode |= SYSMODE_SEG_DS_SS; - return (M.x86.R_BP + M.x86.R_DI + displacement) & 0xffff; - case 4: - DECODE_PRINTF2("%d[SI]", displacement); - return (M.x86.R_SI + displacement) & 0xffff; - case 5: - DECODE_PRINTF2("%d[DI]", displacement); - return (M.x86.R_DI + displacement) & 0xffff; - case 6: - DECODE_PRINTF2("%d[BP]", displacement); - M.x86.mode |= SYSMODE_SEG_DS_SS; - return (M.x86.R_BP + displacement) & 0xffff; - case 7: - DECODE_PRINTF2("%d[BX]", displacement); - return (M.x86.R_BX + displacement) & 0xffff; - } - } - HALT_SYS(); - return 0; /* SHOULD NOT HAPPEN */ -} - -/**************************************************************************** -PARAMETERS: -rm - RM value to decode - -RETURNS: -Offset in memory for the address decoding - -REMARKS: -Return the offset given by mod=10 addressing. Also enables the -decoding of instructions. -****************************************************************************/ -unsigned decode_rm10_address( - int rm) -{ - if (M.x86.mode & SYSMODE_PREFIX_ADDR) { - int displacement; - - /* 32-bit addressing */ - if (rm != 4) - displacement = (s32)fetch_long_imm(); - else - displacement = 0; - - switch (rm) { - case 0: - DECODE_PRINTF2("%d[EAX]", displacement); - return M.x86.R_EAX + displacement; - case 1: - DECODE_PRINTF2("%d[ECX]", displacement); - return M.x86.R_ECX + displacement; - case 2: - DECODE_PRINTF2("%d[EDX]", displacement); - return M.x86.R_EDX + displacement; - case 3: - DECODE_PRINTF2("%d[EBX]", displacement); - return M.x86.R_EBX + displacement; - case 4: { - int offset = decode_sib_address(2); - displacement = (s32)fetch_long_imm(); - DECODE_PRINTF2("[%d]", displacement); - return offset + displacement; - } - case 5: - DECODE_PRINTF2("%d[EBP]", displacement); - return M.x86.R_EBP + displacement; - case 6: - DECODE_PRINTF2("%d[ESI]", displacement); - return M.x86.R_ESI + displacement; - case 7: - DECODE_PRINTF2("%d[EDI]", displacement); - return M.x86.R_EDI + displacement; - } - } else { - int displacement = (s16)fetch_word_imm(); - - /* 16-bit addressing */ - switch (rm) { - case 0: - DECODE_PRINTF2("%d[BX+SI]", displacement); - return (M.x86.R_BX + M.x86.R_SI + displacement) & 0xffff; - case 1: - DECODE_PRINTF2("%d[BX+DI]", displacement); - return (M.x86.R_BX + M.x86.R_DI + displacement) & 0xffff; - case 2: - DECODE_PRINTF2("%d[BP+SI]", displacement); - M.x86.mode |= SYSMODE_SEG_DS_SS; - return (M.x86.R_BP + M.x86.R_SI + displacement) & 0xffff; - case 3: - DECODE_PRINTF2("%d[BP+DI]", displacement); - M.x86.mode |= SYSMODE_SEG_DS_SS; - return (M.x86.R_BP + M.x86.R_DI + displacement) & 0xffff; - case 4: - DECODE_PRINTF2("%d[SI]", displacement); - return (M.x86.R_SI + displacement) & 0xffff; - case 5: - DECODE_PRINTF2("%d[DI]", displacement); - return (M.x86.R_DI + displacement) & 0xffff; - case 6: - DECODE_PRINTF2("%d[BP]", displacement); - M.x86.mode |= SYSMODE_SEG_DS_SS; - return (M.x86.R_BP + displacement) & 0xffff; - case 7: - DECODE_PRINTF2("%d[BX]", displacement); - return (M.x86.R_BX + displacement) & 0xffff; - } - } - HALT_SYS(); - return 0; /* SHOULD NOT HAPPEN */ -} - -/**************************************************************************** -PARAMETERS: -mod - modifier -rm - RM value to decode - -RETURNS: -Offset in memory for the address decoding, multiplexing calls to -the decode_rmXX_address functions - -REMARKS: -Return the offset given by "mod" addressing. -****************************************************************************/ - -unsigned decode_rmXX_address(int mod, int rm) -{ - if(mod == 0) - return decode_rm00_address(rm); - if(mod == 1) - return decode_rm01_address(rm); - return decode_rm10_address(rm); -} diff --git a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/ops.c b/qemu/roms/u-boot/drivers/bios_emulator/x86emu/ops.c deleted file mode 100644 index f8e093d75..000000000 --- a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/ops.c +++ /dev/null @@ -1,5423 +0,0 @@ -/**************************************************************************** -* Realmode X86 Emulator Library -* -* Copyright (C) 2007 Freescale Semiconductor, Inc. -* Jason Jin <Jason.jin@freescale.com> -* -* Copyright (C) 1991-2004 SciTech Software, Inc. -* Copyright (C) David Mosberger-Tang -* Copyright (C) 1999 Egbert Eich -* -* ======================================================================== -* -* Permission to use, copy, modify, distribute, and sell this software and -* its documentation for any purpose is hereby granted without fee, -* provided that the above copyright notice appear in all copies and that -* both that copyright notice and this permission notice appear in -* supporting documentation, and that the name of the authors not be used -* in advertising or publicity pertaining to distribution of the software -* without specific, written prior permission. The authors makes no -* representations about the suitability of this software for any purpose. -* It is provided "as is" without express or implied warranty. -* -* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, -* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO -* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR -* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF -* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR -* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR -* PERFORMANCE OF THIS SOFTWARE. -* -* ======================================================================== -* -* Language: ANSI C -* Environment: Any -* Developer: Kendall Bennett -* -* Description: This file includes subroutines to implement the decoding -* and emulation of all the x86 processor instructions. -* -* There are approximately 250 subroutines in here, which correspond -* to the 256 byte-"opcodes" found on the 8086. The table which -* dispatches this is found in the files optab.[ch]. -* -* Each opcode proc has a comment preceeding it which gives it's table -* address. Several opcodes are missing (undefined) in the table. -* -* Each proc includes information for decoding (DECODE_PRINTF and -* DECODE_PRINTF2), debugging (TRACE_REGS, SINGLE_STEP), and misc -* functions (START_OF_INSTR, END_OF_INSTR). -* -* Many of the procedures are *VERY* similar in coding. This has -* allowed for a very large amount of code to be generated in a fairly -* short amount of time (i.e. cut, paste, and modify). The result is -* that much of the code below could have been folded into subroutines -* for a large reduction in size of this file. The downside would be -* that there would be a penalty in execution speed. The file could -* also have been *MUCH* larger by inlining certain functions which -* were called. This could have resulted even faster execution. The -* prime directive I used to decide whether to inline the code or to -* modularize it, was basically: 1) no unnecessary subroutine calls, -* 2) no routines more than about 200 lines in size, and 3) modularize -* any code that I might not get right the first time. The fetch_* -* subroutines fall into the latter category. The The decode_* fall -* into the second category. The coding of the "switch(mod){ .... }" -* in many of the subroutines below falls into the first category. -* Especially, the coding of {add,and,or,sub,...}_{byte,word} -* subroutines are an especially glaring case of the third guideline. -* Since so much of the code is cloned from other modules (compare -* opcode #00 to opcode #01), making the basic operations subroutine -* calls is especially important; otherwise mistakes in coding an -* "add" would represent a nightmare in maintenance. -* -****************************************************************************/ - -#include <common.h> -#include "x86emu/x86emui.h" - -/*----------------------------- Implementation ----------------------------*/ - -/* constant arrays to do several instructions in just one function */ - -#ifdef DEBUG -static char *x86emu_GenOpName[8] = { - "ADD", "OR", "ADC", "SBB", "AND", "SUB", "XOR", "CMP"}; -#endif - -/* used by several opcodes */ -static u8 (*genop_byte_operation[])(u8 d, u8 s) = -{ - add_byte, /* 00 */ - or_byte, /* 01 */ - adc_byte, /* 02 */ - sbb_byte, /* 03 */ - and_byte, /* 04 */ - sub_byte, /* 05 */ - xor_byte, /* 06 */ - cmp_byte, /* 07 */ -}; - -static u16 (*genop_word_operation[])(u16 d, u16 s) = -{ - add_word, /*00 */ - or_word, /*01 */ - adc_word, /*02 */ - sbb_word, /*03 */ - and_word, /*04 */ - sub_word, /*05 */ - xor_word, /*06 */ - cmp_word, /*07 */ -}; - -static u32 (*genop_long_operation[])(u32 d, u32 s) = -{ - add_long, /*00 */ - or_long, /*01 */ - adc_long, /*02 */ - sbb_long, /*03 */ - and_long, /*04 */ - sub_long, /*05 */ - xor_long, /*06 */ - cmp_long, /*07 */ -}; - -/* used by opcodes 80, c0, d0, and d2. */ -static u8(*opcD0_byte_operation[])(u8 d, u8 s) = -{ - rol_byte, - ror_byte, - rcl_byte, - rcr_byte, - shl_byte, - shr_byte, - shl_byte, /* sal_byte === shl_byte by definition */ - sar_byte, -}; - -/* used by opcodes c1, d1, and d3. */ -static u16(*opcD1_word_operation[])(u16 s, u8 d) = -{ - rol_word, - ror_word, - rcl_word, - rcr_word, - shl_word, - shr_word, - shl_word, /* sal_byte === shl_byte by definition */ - sar_word, -}; - -/* used by opcodes c1, d1, and d3. */ -static u32 (*opcD1_long_operation[])(u32 s, u8 d) = -{ - rol_long, - ror_long, - rcl_long, - rcr_long, - shl_long, - shr_long, - shl_long, /* sal_byte === shl_byte by definition */ - sar_long, -}; - -#ifdef DEBUG - -static char *opF6_names[8] = - { "TEST\t", "", "NOT\t", "NEG\t", "MUL\t", "IMUL\t", "DIV\t", "IDIV\t" }; - -#endif - -/**************************************************************************** -PARAMETERS: -op1 - Instruction op code - -REMARKS: -Handles illegal opcodes. -****************************************************************************/ -void x86emuOp_illegal_op( - u8 op1) -{ - START_OF_INSTR(); - if (M.x86.R_SP != 0) { - DECODE_PRINTF("ILLEGAL X86 OPCODE\n"); - TRACE_REGS(); - DB( printk("%04x:%04x: %02X ILLEGAL X86 OPCODE!\n", - M.x86.R_CS, M.x86.R_IP-1,op1)); - HALT_SYS(); - } - else { - /* If we get here, it means the stack pointer is back to zero - * so we are just returning from an emulator service call - * so therte is no need to display an error message. We trap - * the emulator with an 0xF1 opcode to finish the service - * call. - */ - X86EMU_halt_sys(); - } - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcodes 0x00, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30, 0x38 -****************************************************************************/ -void x86emuOp_genop_byte_RM_R(u8 op1) -{ - int mod, rl, rh; - uint destoffset; - u8 *destreg, *srcreg; - u8 destval; - - op1 = (op1 >> 3) & 0x7; - - START_OF_INSTR(); - DECODE_PRINTF(x86emu_GenOpName[op1]); - DECODE_PRINTF("\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if(mod<3) - { destoffset = decode_rmXX_address(mod,rl); - DECODE_PRINTF(","); - destval = fetch_data_byte(destoffset); - srcreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = genop_byte_operation[op1](destval, *srcreg); - store_data_byte(destoffset, destval); - } - else - { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = genop_byte_operation[op1](*destreg, *srcreg); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcodes 0x01, 0x09, 0x11, 0x19, 0x21, 0x29, 0x31, 0x39 -****************************************************************************/ -void x86emuOp_genop_word_RM_R(u8 op1) -{ - int mod, rl, rh; - uint destoffset; - - op1 = (op1 >> 3) & 0x7; - - START_OF_INSTR(); - DECODE_PRINTF(x86emu_GenOpName[op1]); - DECODE_PRINTF("\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - - if(mod<3) { - destoffset = decode_rmXX_address(mod,rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - u32 *srcreg; - - DECODE_PRINTF(","); - destval = fetch_data_long(destoffset); - srcreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = genop_long_operation[op1](destval, *srcreg); - store_data_long(destoffset, destval); - } else { - u16 destval; - u16 *srcreg; - - DECODE_PRINTF(","); - destval = fetch_data_word(destoffset); - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = genop_word_operation[op1](destval, *srcreg); - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*srcreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = genop_long_operation[op1](*destreg, *srcreg); - } else { - u16 *destreg,*srcreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = genop_word_operation[op1](*destreg, *srcreg); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcodes 0x02, 0x0a, 0x12, 0x1a, 0x22, 0x2a, 0x32, 0x3a -****************************************************************************/ -void x86emuOp_genop_byte_R_RM(u8 op1) -{ - int mod, rl, rh; - u8 *destreg, *srcreg; - uint srcoffset; - u8 srcval; - - op1 = (op1 >> 3) & 0x7; - - START_OF_INSTR(); - DECODE_PRINTF(x86emu_GenOpName[op1]); - DECODE_PRINTF("\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod,rl); - srcval = fetch_data_byte(srcoffset); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rl); - srcval = *srcreg; - } - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = genop_byte_operation[op1](*destreg, srcval); - - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcodes 0x03, 0x0b, 0x13, 0x1b, 0x23, 0x2b, 0x33, 0x3b -****************************************************************************/ -void x86emuOp_genop_word_R_RM(u8 op1) -{ - int mod, rl, rh; - uint srcoffset; - u32 *destreg32, srcval; - u16 *destreg; - - op1 = (op1 >> 3) & 0x7; - - START_OF_INSTR(); - DECODE_PRINTF(x86emu_GenOpName[op1]); - DECODE_PRINTF("\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcoffset = decode_rmXX_address(mod,rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - destreg32 = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcval = fetch_data_long(srcoffset); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg32 = genop_long_operation[op1](*destreg32, srcval); - } else { - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcval = fetch_data_word(srcoffset); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = genop_word_operation[op1](*destreg, srcval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg; - destreg32 = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg32 = genop_long_operation[op1](*destreg32, *srcreg); - } else { - u16 *srcreg; - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = genop_word_operation[op1](*destreg, *srcreg); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcodes 0x04, 0x0c, 0x14, 0x1c, 0x24, 0x2c, 0x34, 0x3c -****************************************************************************/ -void x86emuOp_genop_byte_AL_IMM(u8 op1) -{ - u8 srcval; - - op1 = (op1 >> 3) & 0x7; - - START_OF_INSTR(); - DECODE_PRINTF(x86emu_GenOpName[op1]); - DECODE_PRINTF("\tAL,"); - srcval = fetch_byte_imm(); - DECODE_PRINTF2("%x\n", srcval); - TRACE_AND_STEP(); - M.x86.R_AL = genop_byte_operation[op1](M.x86.R_AL, srcval); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcodes 0x05, 0x0d, 0x15, 0x1d, 0x25, 0x2d, 0x35, 0x3d -****************************************************************************/ -void x86emuOp_genop_word_AX_IMM(u8 op1) -{ - u32 srcval; - - op1 = (op1 >> 3) & 0x7; - - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF(x86emu_GenOpName[op1]); - DECODE_PRINTF("\tEAX,"); - srcval = fetch_long_imm(); - } else { - DECODE_PRINTF(x86emu_GenOpName[op1]); - DECODE_PRINTF("\tAX,"); - srcval = fetch_word_imm(); - } - DECODE_PRINTF2("%x\n", srcval); - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - M.x86.R_EAX = genop_long_operation[op1](M.x86.R_EAX, srcval); - } else { - M.x86.R_AX = genop_word_operation[op1](M.x86.R_AX, (u16)srcval); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x06 -****************************************************************************/ -void x86emuOp_push_ES(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("PUSH\tES\n"); - TRACE_AND_STEP(); - push_word(M.x86.R_ES); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x07 -****************************************************************************/ -void x86emuOp_pop_ES(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("POP\tES\n"); - TRACE_AND_STEP(); - M.x86.R_ES = pop_word(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0e -****************************************************************************/ -void x86emuOp_push_CS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("PUSH\tCS\n"); - TRACE_AND_STEP(); - push_word(M.x86.R_CS); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f. Escape for two-byte opcode (286 or better) -****************************************************************************/ -void x86emuOp_two_byte(u8 X86EMU_UNUSED(op1)) -{ - u8 op2 = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++)); - INC_DECODED_INST_LEN(1); - (*x86emu_optab2[op2])(op2); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x16 -****************************************************************************/ -void x86emuOp_push_SS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("PUSH\tSS\n"); - TRACE_AND_STEP(); - push_word(M.x86.R_SS); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x17 -****************************************************************************/ -void x86emuOp_pop_SS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("POP\tSS\n"); - TRACE_AND_STEP(); - M.x86.R_SS = pop_word(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x1e -****************************************************************************/ -void x86emuOp_push_DS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("PUSH\tDS\n"); - TRACE_AND_STEP(); - push_word(M.x86.R_DS); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x1f -****************************************************************************/ -void x86emuOp_pop_DS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("POP\tDS\n"); - TRACE_AND_STEP(); - M.x86.R_DS = pop_word(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x26 -****************************************************************************/ -void x86emuOp_segovr_ES(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("ES:\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_SEGOVR_ES; - /* - * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4 - * opcode subroutines we do not want to do this. - */ - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x27 -****************************************************************************/ -void x86emuOp_daa(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("DAA\n"); - TRACE_AND_STEP(); - M.x86.R_AL = daa_byte(M.x86.R_AL); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x2e -****************************************************************************/ -void x86emuOp_segovr_CS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("CS:\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_SEGOVR_CS; - /* note no DECODE_CLEAR_SEGOVR here. */ - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x2f -****************************************************************************/ -void x86emuOp_das(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("DAS\n"); - TRACE_AND_STEP(); - M.x86.R_AL = das_byte(M.x86.R_AL); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x36 -****************************************************************************/ -void x86emuOp_segovr_SS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("SS:\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_SEGOVR_SS; - /* no DECODE_CLEAR_SEGOVR ! */ - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x37 -****************************************************************************/ -void x86emuOp_aaa(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("AAA\n"); - TRACE_AND_STEP(); - M.x86.R_AX = aaa_word(M.x86.R_AX); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x3e -****************************************************************************/ -void x86emuOp_segovr_DS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("DS:\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_SEGOVR_DS; - /* NO DECODE_CLEAR_SEGOVR! */ - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x3f -****************************************************************************/ -void x86emuOp_aas(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("AAS\n"); - TRACE_AND_STEP(); - M.x86.R_AX = aas_word(M.x86.R_AX); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x40 - 0x47 -****************************************************************************/ -void x86emuOp_inc_register(u8 op1) -{ - START_OF_INSTR(); - op1 &= 0x7; - DECODE_PRINTF("INC\t"); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *reg; - reg = DECODE_RM_LONG_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *reg = inc_long(*reg); - } else { - u16 *reg; - reg = DECODE_RM_WORD_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *reg = inc_word(*reg); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x48 - 0x4F -****************************************************************************/ -void x86emuOp_dec_register(u8 op1) -{ - START_OF_INSTR(); - op1 &= 0x7; - DECODE_PRINTF("DEC\t"); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *reg; - reg = DECODE_RM_LONG_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *reg = dec_long(*reg); - } else { - u16 *reg; - reg = DECODE_RM_WORD_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *reg = dec_word(*reg); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x50 - 0x57 -****************************************************************************/ -void x86emuOp_push_register(u8 op1) -{ - START_OF_INSTR(); - op1 &= 0x7; - DECODE_PRINTF("PUSH\t"); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *reg; - reg = DECODE_RM_LONG_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - push_long(*reg); - } else { - u16 *reg; - reg = DECODE_RM_WORD_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - push_word(*reg); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x58 - 0x5F -****************************************************************************/ -void x86emuOp_pop_register(u8 op1) -{ - START_OF_INSTR(); - op1 &= 0x7; - DECODE_PRINTF("POP\t"); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *reg; - reg = DECODE_RM_LONG_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *reg = pop_long(); - } else { - u16 *reg; - reg = DECODE_RM_WORD_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *reg = pop_word(); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x60 -****************************************************************************/ -void x86emuOp_push_all(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("PUSHAD\n"); - } else { - DECODE_PRINTF("PUSHA\n"); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 old_sp = M.x86.R_ESP; - - push_long(M.x86.R_EAX); - push_long(M.x86.R_ECX); - push_long(M.x86.R_EDX); - push_long(M.x86.R_EBX); - push_long(old_sp); - push_long(M.x86.R_EBP); - push_long(M.x86.R_ESI); - push_long(M.x86.R_EDI); - } else { - u16 old_sp = M.x86.R_SP; - - push_word(M.x86.R_AX); - push_word(M.x86.R_CX); - push_word(M.x86.R_DX); - push_word(M.x86.R_BX); - push_word(old_sp); - push_word(M.x86.R_BP); - push_word(M.x86.R_SI); - push_word(M.x86.R_DI); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x61 -****************************************************************************/ -void x86emuOp_pop_all(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("POPAD\n"); - } else { - DECODE_PRINTF("POPA\n"); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - M.x86.R_EDI = pop_long(); - M.x86.R_ESI = pop_long(); - M.x86.R_EBP = pop_long(); - M.x86.R_ESP += 4; /* skip ESP */ - M.x86.R_EBX = pop_long(); - M.x86.R_EDX = pop_long(); - M.x86.R_ECX = pop_long(); - M.x86.R_EAX = pop_long(); - } else { - M.x86.R_DI = pop_word(); - M.x86.R_SI = pop_word(); - M.x86.R_BP = pop_word(); - M.x86.R_SP += 2; /* skip SP */ - M.x86.R_BX = pop_word(); - M.x86.R_DX = pop_word(); - M.x86.R_CX = pop_word(); - M.x86.R_AX = pop_word(); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/*opcode 0x62 ILLEGAL OP, calls x86emuOp_illegal_op() */ -/*opcode 0x63 ILLEGAL OP, calls x86emuOp_illegal_op() */ - -/**************************************************************************** -REMARKS: -Handles opcode 0x64 -****************************************************************************/ -void x86emuOp_segovr_FS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("FS:\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_SEGOVR_FS; - /* - * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4 - * opcode subroutines we do not want to do this. - */ - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x65 -****************************************************************************/ -void x86emuOp_segovr_GS(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("GS:\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_SEGOVR_GS; - /* - * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4 - * opcode subroutines we do not want to do this. - */ - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x66 - prefix for 32-bit register -****************************************************************************/ -void x86emuOp_prefix_data(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("DATA:\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_PREFIX_DATA; - /* note no DECODE_CLEAR_SEGOVR here. */ - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x67 - prefix for 32-bit address -****************************************************************************/ -void x86emuOp_prefix_addr(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("ADDR:\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_PREFIX_ADDR; - /* note no DECODE_CLEAR_SEGOVR here. */ - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x68 -****************************************************************************/ -void x86emuOp_push_word_IMM(u8 X86EMU_UNUSED(op1)) -{ - u32 imm; - - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - imm = fetch_long_imm(); - } else { - imm = fetch_word_imm(); - } - DECODE_PRINTF2("PUSH\t%x\n", imm); - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - push_long(imm); - } else { - push_word((u16)imm); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x69 -****************************************************************************/ -void x86emuOp_imul_word_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("IMUL\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 srcval; - u32 res_lo,res_hi; - s32 imm; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcval = fetch_data_long(srcoffset); - imm = fetch_long_imm(); - DECODE_PRINTF2(",%d\n", (s32)imm); - TRACE_AND_STEP(); - imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm); - if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) || - (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } - *destreg = (u32)res_lo; - } else { - u16 *destreg; - u16 srcval; - u32 res; - s16 imm; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcval = fetch_data_word(srcoffset); - imm = fetch_word_imm(); - DECODE_PRINTF2(",%d\n", (s32)imm); - TRACE_AND_STEP(); - res = (s16)srcval * (s16)imm; - if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) || - (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } - *destreg = (u16)res; - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*srcreg; - u32 res_lo,res_hi; - s32 imm; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rl); - imm = fetch_long_imm(); - DECODE_PRINTF2(",%d\n", (s32)imm); - TRACE_AND_STEP(); - imul_long_direct(&res_lo,&res_hi,(s32)*srcreg,(s32)imm); - if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) || - (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } - *destreg = (u32)res_lo; - } else { - u16 *destreg,*srcreg; - u32 res; - s16 imm; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rl); - imm = fetch_word_imm(); - DECODE_PRINTF2(",%d\n", (s32)imm); - res = (s16)*srcreg * (s16)imm; - if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) || - (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } - *destreg = (u16)res; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x6a -****************************************************************************/ -void x86emuOp_push_byte_IMM(u8 X86EMU_UNUSED(op1)) -{ - s16 imm; - - START_OF_INSTR(); - imm = (s8)fetch_byte_imm(); - DECODE_PRINTF2("PUSH\t%d\n", imm); - TRACE_AND_STEP(); - push_word(imm); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x6b -****************************************************************************/ -void x86emuOp_imul_byte_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint srcoffset; - s8 imm; - - START_OF_INSTR(); - DECODE_PRINTF("IMUL\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 srcval; - u32 res_lo,res_hi; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcval = fetch_data_long(srcoffset); - imm = fetch_byte_imm(); - DECODE_PRINTF2(",%d\n", (s32)imm); - TRACE_AND_STEP(); - imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm); - if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) || - (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } - *destreg = (u32)res_lo; - } else { - u16 *destreg; - u16 srcval; - u32 res; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcval = fetch_data_word(srcoffset); - imm = fetch_byte_imm(); - DECODE_PRINTF2(",%d\n", (s32)imm); - TRACE_AND_STEP(); - res = (s16)srcval * (s16)imm; - if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) || - (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } - *destreg = (u16)res; - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*srcreg; - u32 res_lo,res_hi; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rl); - imm = fetch_byte_imm(); - DECODE_PRINTF2(",%d\n", (s32)imm); - TRACE_AND_STEP(); - imul_long_direct(&res_lo,&res_hi,(s32)*srcreg,(s32)imm); - if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) || - (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } - *destreg = (u32)res_lo; - } else { - u16 *destreg,*srcreg; - u32 res; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rl); - imm = fetch_byte_imm(); - DECODE_PRINTF2(",%d\n", (s32)imm); - TRACE_AND_STEP(); - res = (s16)*srcreg * (s16)imm; - if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) || - (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } - *destreg = (u16)res; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x6c -****************************************************************************/ -void x86emuOp_ins_byte(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("INSB\n"); - ins(1); - TRACE_AND_STEP(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x6d -****************************************************************************/ -void x86emuOp_ins_word(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("INSD\n"); - ins(4); - } else { - DECODE_PRINTF("INSW\n"); - ins(2); - } - TRACE_AND_STEP(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x6e -****************************************************************************/ -void x86emuOp_outs_byte(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("OUTSB\n"); - outs(1); - TRACE_AND_STEP(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x6f -****************************************************************************/ -void x86emuOp_outs_word(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("OUTSD\n"); - outs(4); - } else { - DECODE_PRINTF("OUTSW\n"); - outs(2); - } - TRACE_AND_STEP(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x70 - 0x7F -****************************************************************************/ -int x86emu_check_jump_condition(u8 op); - -void x86emuOp_jump_near_cond(u8 op1) -{ - s8 offset; - u16 target; - int cond; - - /* jump to byte offset if overflow flag is set */ - START_OF_INSTR(); - cond = x86emu_check_jump_condition(op1 & 0xF); - offset = (s8)fetch_byte_imm(); - target = (u16)(M.x86.R_IP + (s16)offset); - DECODE_PRINTF2("%x\n", target); - TRACE_AND_STEP(); - if (cond) - M.x86.R_IP = target; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x80 -****************************************************************************/ -void x86emuOp_opc80_byte_RM_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg; - uint destoffset; - u8 imm; - u8 destval; - - /* - * Weirdo special case instruction format. Part of the opcode - * held below in "RH". Doubly nested case would result, except - * that the decoded instruction - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - - switch (rh) { - case 0: - DECODE_PRINTF("ADD\t"); - break; - case 1: - DECODE_PRINTF("OR\t"); - break; - case 2: - DECODE_PRINTF("ADC\t"); - break; - case 3: - DECODE_PRINTF("SBB\t"); - break; - case 4: - DECODE_PRINTF("AND\t"); - break; - case 5: - DECODE_PRINTF("SUB\t"); - break; - case 6: - DECODE_PRINTF("XOR\t"); - break; - case 7: - DECODE_PRINTF("CMP\t"); - break; - } - } -#endif - /* know operation, decode the mod byte to find the addressing - mode. */ - if (mod < 3) { - DECODE_PRINTF("BYTE PTR "); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - destval = fetch_data_byte(destoffset); - imm = fetch_byte_imm(); - DECODE_PRINTF2("%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_byte_operation[rh]) (destval, imm); - if (rh != 7) - store_data_byte(destoffset, destval); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF(","); - imm = fetch_byte_imm(); - DECODE_PRINTF2("%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_byte_operation[rh]) (*destreg, imm); - if (rh != 7) - *destreg = destval; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x81 -****************************************************************************/ -void x86emuOp_opc81_word_RM_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - - /* - * Weirdo special case instruction format. Part of the opcode - * held below in "RH". Doubly nested case would result, except - * that the decoded instruction - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - - switch (rh) { - case 0: - DECODE_PRINTF("ADD\t"); - break; - case 1: - DECODE_PRINTF("OR\t"); - break; - case 2: - DECODE_PRINTF("ADC\t"); - break; - case 3: - DECODE_PRINTF("SBB\t"); - break; - case 4: - DECODE_PRINTF("AND\t"); - break; - case 5: - DECODE_PRINTF("SUB\t"); - break; - case 6: - DECODE_PRINTF("XOR\t"); - break; - case 7: - DECODE_PRINTF("CMP\t"); - break; - } - } -#endif - /* - * Know operation, decode the mod byte to find the addressing - * mode. - */ - if (mod < 3) { - DECODE_PRINTF("DWORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval,imm; - - DECODE_PRINTF(","); - destval = fetch_data_long(destoffset); - imm = fetch_long_imm(); - DECODE_PRINTF2("%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_long_operation[rh]) (destval, imm); - if (rh != 7) - store_data_long(destoffset, destval); - } else { - u16 destval,imm; - - DECODE_PRINTF(","); - destval = fetch_data_word(destoffset); - imm = fetch_word_imm(); - DECODE_PRINTF2("%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_word_operation[rh]) (destval, imm); - if (rh != 7) - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 destval,imm; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - imm = fetch_long_imm(); - DECODE_PRINTF2("%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_long_operation[rh]) (*destreg, imm); - if (rh != 7) - *destreg = destval; - } else { - u16 *destreg; - u16 destval,imm; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - imm = fetch_word_imm(); - DECODE_PRINTF2("%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_word_operation[rh]) (*destreg, imm); - if (rh != 7) - *destreg = destval; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x82 -****************************************************************************/ -void x86emuOp_opc82_byte_RM_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg; - uint destoffset; - u8 imm; - u8 destval; - - /* - * Weirdo special case instruction format. Part of the opcode - * held below in "RH". Doubly nested case would result, except - * that the decoded instruction Similar to opcode 81, except that - * the immediate byte is sign extended to a word length. - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - switch (rh) { - case 0: - DECODE_PRINTF("ADD\t"); - break; - case 1: - DECODE_PRINTF("OR\t"); - break; - case 2: - DECODE_PRINTF("ADC\t"); - break; - case 3: - DECODE_PRINTF("SBB\t"); - break; - case 4: - DECODE_PRINTF("AND\t"); - break; - case 5: - DECODE_PRINTF("SUB\t"); - break; - case 6: - DECODE_PRINTF("XOR\t"); - break; - case 7: - DECODE_PRINTF("CMP\t"); - break; - } - } -#endif - /* know operation, decode the mod byte to find the addressing - mode. */ - if (mod < 3) { - DECODE_PRINTF("BYTE PTR "); - destoffset = decode_rmXX_address(mod, rl); - destval = fetch_data_byte(destoffset); - imm = fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_byte_operation[rh]) (destval, imm); - if (rh != 7) - store_data_byte(destoffset, destval); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - imm = fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_byte_operation[rh]) (*destreg, imm); - if (rh != 7) - *destreg = destval; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x83 -****************************************************************************/ -void x86emuOp_opc83_word_RM_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - - /* - * Weirdo special case instruction format. Part of the opcode - * held below in "RH". Doubly nested case would result, except - * that the decoded instruction Similar to opcode 81, except that - * the immediate byte is sign extended to a word length. - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - switch (rh) { - case 0: - DECODE_PRINTF("ADD\t"); - break; - case 1: - DECODE_PRINTF("OR\t"); - break; - case 2: - DECODE_PRINTF("ADC\t"); - break; - case 3: - DECODE_PRINTF("SBB\t"); - break; - case 4: - DECODE_PRINTF("AND\t"); - break; - case 5: - DECODE_PRINTF("SUB\t"); - break; - case 6: - DECODE_PRINTF("XOR\t"); - break; - case 7: - DECODE_PRINTF("CMP\t"); - break; - } - } -#endif - /* know operation, decode the mod byte to find the addressing - mode. */ - if (mod < 3) { - DECODE_PRINTF("DWORD PTR "); - destoffset = decode_rmXX_address(mod,rl); - - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval,imm; - - destval = fetch_data_long(destoffset); - imm = (s8) fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_long_operation[rh]) (destval, imm); - if (rh != 7) - store_data_long(destoffset, destval); - } else { - u16 destval,imm; - - destval = fetch_data_word(destoffset); - imm = (s8) fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_word_operation[rh]) (destval, imm); - if (rh != 7) - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 destval,imm; - - destreg = DECODE_RM_LONG_REGISTER(rl); - imm = (s8) fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_long_operation[rh]) (*destreg, imm); - if (rh != 7) - *destreg = destval; - } else { - u16 *destreg; - u16 destval,imm; - - destreg = DECODE_RM_WORD_REGISTER(rl); - imm = (s8) fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - destval = (*genop_word_operation[rh]) (*destreg, imm); - if (rh != 7) - *destreg = destval; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x84 -****************************************************************************/ -void x86emuOp_test_byte_RM_R(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg, *srcreg; - uint destoffset; - u8 destval; - - START_OF_INSTR(); - DECODE_PRINTF("TEST\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - destval = fetch_data_byte(destoffset); - srcreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - test_byte(destval, *srcreg); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - test_byte(*destreg, *srcreg); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x85 -****************************************************************************/ -void x86emuOp_test_word_RM_R(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - - START_OF_INSTR(); - DECODE_PRINTF("TEST\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - u32 *srcreg; - - DECODE_PRINTF(","); - destval = fetch_data_long(destoffset); - srcreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - test_long(destval, *srcreg); - } else { - u16 destval; - u16 *srcreg; - - DECODE_PRINTF(","); - destval = fetch_data_word(destoffset); - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - test_word(destval, *srcreg); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*srcreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - test_long(*destreg, *srcreg); - } else { - u16 *destreg,*srcreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - test_word(*destreg, *srcreg); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x86 -****************************************************************************/ -void x86emuOp_xchg_byte_RM_R(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg, *srcreg; - uint destoffset; - u8 destval; - u8 tmp; - - START_OF_INSTR(); - DECODE_PRINTF("XCHG\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - destval = fetch_data_byte(destoffset); - srcreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - tmp = *srcreg; - *srcreg = destval; - destval = tmp; - store_data_byte(destoffset, destval); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - tmp = *srcreg; - *srcreg = *destreg; - *destreg = tmp; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x87 -****************************************************************************/ -void x86emuOp_xchg_word_RM_R(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - - START_OF_INSTR(); - DECODE_PRINTF("XCHG\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg; - u32 destval,tmp; - - destval = fetch_data_long(destoffset); - srcreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - tmp = *srcreg; - *srcreg = destval; - destval = tmp; - store_data_long(destoffset, destval); - } else { - u16 *srcreg; - u16 destval,tmp; - - destval = fetch_data_word(destoffset); - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - tmp = *srcreg; - *srcreg = destval; - destval = tmp; - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*srcreg; - u32 tmp; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - tmp = *srcreg; - *srcreg = *destreg; - *destreg = tmp; - } else { - u16 *destreg,*srcreg; - u16 tmp; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - tmp = *srcreg; - *srcreg = *destreg; - *destreg = tmp; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x88 -****************************************************************************/ -void x86emuOp_mov_byte_RM_R(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg, *srcreg; - uint destoffset; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - store_data_byte(destoffset, *srcreg); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x89 -****************************************************************************/ -void x86emuOp_mov_word_RM_R(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg; - - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - store_data_long(destoffset, *srcreg); - } else { - u16 *srcreg; - - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - store_data_word(destoffset, *srcreg); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*srcreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } else { - u16 *destreg,*srcreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x8a -****************************************************************************/ -void x86emuOp_mov_byte_R_RM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg, *srcreg; - uint srcoffset; - u8 srcval; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = fetch_data_byte(srcoffset); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x8b -****************************************************************************/ -void x86emuOp_mov_word_R_RM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 srcval; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = fetch_data_long(srcoffset); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } else { - u16 *destreg; - u16 srcval; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = fetch_data_word(srcoffset); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg, *srcreg; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } else { - u16 *destreg, *srcreg; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x8c -****************************************************************************/ -void x86emuOp_mov_word_RM_SR(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u16 *destreg, *srcreg; - uint destoffset; - u16 destval; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - srcreg = decode_rm_seg_register(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = *srcreg; - store_data_word(destoffset, destval); - } else { /* register to register */ - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - srcreg = decode_rm_seg_register(rh); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x8d -****************************************************************************/ -void x86emuOp_lea_word_R_M(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u16 *srcreg; - uint destoffset; - -/* - * TODO: Need to handle address size prefix! - * - * lea eax,[eax+ebx*2] ?? - */ - - START_OF_INSTR(); - DECODE_PRINTF("LEA\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *srcreg = (u16)destoffset; - } - /* } else { undefined. Do nothing. } */ - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x8e -****************************************************************************/ -void x86emuOp_mov_word_SR_RM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u16 *destreg, *srcreg; - uint srcoffset; - u16 srcval; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destreg = decode_rm_seg_register(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = fetch_data_word(srcoffset); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } else { /* register to register */ - destreg = decode_rm_seg_register(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } - /* - * Clean up, and reset all the R_xSP pointers to the correct - * locations. This is about 3x too much overhead (doing all the - * segreg ptrs when only one is needed, but this instruction - * *cannot* be that common, and this isn't too much work anyway. - */ - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x8f -****************************************************************************/ -void x86emuOp_pop_RM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - - START_OF_INSTR(); - DECODE_PRINTF("POP\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (rh != 0) { - DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n"); - HALT_SYS(); - } - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = pop_long(); - store_data_long(destoffset, destval); - } else { - u16 destval; - - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = pop_word(); - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = pop_long(); - } else { - u16 *destreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = pop_word(); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x90 -****************************************************************************/ -void x86emuOp_nop(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("NOP\n"); - TRACE_AND_STEP(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x91-0x97 -****************************************************************************/ -void x86emuOp_xchg_word_AX_register(u8 X86EMU_UNUSED(op1)) -{ - u32 tmp; - - op1 &= 0x7; - - START_OF_INSTR(); - - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *reg32; - DECODE_PRINTF("XCHG\tEAX,"); - reg32 = DECODE_RM_LONG_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - tmp = M.x86.R_EAX; - M.x86.R_EAX = *reg32; - *reg32 = tmp; - } else { - u16 *reg16; - DECODE_PRINTF("XCHG\tAX,"); - reg16 = DECODE_RM_WORD_REGISTER(op1); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - tmp = M.x86.R_AX; - M.x86.R_EAX = *reg16; - *reg16 = (u16)tmp; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x98 -****************************************************************************/ -void x86emuOp_cbw(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("CWDE\n"); - } else { - DECODE_PRINTF("CBW\n"); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - if (M.x86.R_AX & 0x8000) { - M.x86.R_EAX |= 0xffff0000; - } else { - M.x86.R_EAX &= 0x0000ffff; - } - } else { - if (M.x86.R_AL & 0x80) { - M.x86.R_AH = 0xff; - } else { - M.x86.R_AH = 0x0; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x99 -****************************************************************************/ -void x86emuOp_cwd(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("CDQ\n"); - } else { - DECODE_PRINTF("CWD\n"); - } - DECODE_PRINTF("CWD\n"); - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - if (M.x86.R_EAX & 0x80000000) { - M.x86.R_EDX = 0xffffffff; - } else { - M.x86.R_EDX = 0x0; - } - } else { - if (M.x86.R_AX & 0x8000) { - M.x86.R_DX = 0xffff; - } else { - M.x86.R_DX = 0x0; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x9a -****************************************************************************/ -void x86emuOp_call_far_IMM(u8 X86EMU_UNUSED(op1)) -{ - u16 farseg, faroff; - - START_OF_INSTR(); - DECODE_PRINTF("CALL\t"); - faroff = fetch_word_imm(); - farseg = fetch_word_imm(); - DECODE_PRINTF2("%04x:", farseg); - DECODE_PRINTF2("%04x\n", faroff); - CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, farseg, faroff, "FAR "); - - /* XXX - * - * Hooked interrupt vectors calling into our "BIOS" will cause - * problems unless all intersegment stuff is checked for BIOS - * access. Check needed here. For moment, let it alone. - */ - TRACE_AND_STEP(); - push_word(M.x86.R_CS); - M.x86.R_CS = farseg; - push_word(M.x86.R_IP); - M.x86.R_IP = faroff; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x9b -****************************************************************************/ -void x86emuOp_wait(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("WAIT"); - TRACE_AND_STEP(); - /* NADA. */ - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x9c -****************************************************************************/ -void x86emuOp_pushf_word(u8 X86EMU_UNUSED(op1)) -{ - u32 flags; - - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("PUSHFD\n"); - } else { - DECODE_PRINTF("PUSHF\n"); - } - TRACE_AND_STEP(); - - /* clear out *all* bits not representing flags, and turn on real bits */ - flags = (M.x86.R_EFLG & F_MSK) | F_ALWAYS_ON; - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - push_long(flags); - } else { - push_word((u16)flags); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x9d -****************************************************************************/ -void x86emuOp_popf_word(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("POPFD\n"); - } else { - DECODE_PRINTF("POPF\n"); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - M.x86.R_EFLG = pop_long(); - } else { - M.x86.R_FLG = pop_word(); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x9e -****************************************************************************/ -void x86emuOp_sahf(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("SAHF\n"); - TRACE_AND_STEP(); - /* clear the lower bits of the flag register */ - M.x86.R_FLG &= 0xffffff00; - /* or in the AH register into the flags register */ - M.x86.R_FLG |= M.x86.R_AH; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x9f -****************************************************************************/ -void x86emuOp_lahf(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("LAHF\n"); - TRACE_AND_STEP(); - M.x86.R_AH = (u8)(M.x86.R_FLG & 0xff); - /*undocumented TC++ behavior??? Nope. It's documented, but - you have too look real hard to notice it. */ - M.x86.R_AH |= 0x2; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa0 -****************************************************************************/ -void x86emuOp_mov_AL_M_IMM(u8 X86EMU_UNUSED(op1)) -{ - u16 offset; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\tAL,"); - offset = fetch_word_imm(); - DECODE_PRINTF2("[%04x]\n", offset); - TRACE_AND_STEP(); - M.x86.R_AL = fetch_data_byte(offset); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa1 -****************************************************************************/ -void x86emuOp_mov_AX_M_IMM(u8 X86EMU_UNUSED(op1)) -{ - u16 offset; - - START_OF_INSTR(); - offset = fetch_word_imm(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF2("MOV\tEAX,[%04x]\n", offset); - } else { - DECODE_PRINTF2("MOV\tAX,[%04x]\n", offset); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - M.x86.R_EAX = fetch_data_long(offset); - } else { - M.x86.R_AX = fetch_data_word(offset); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa2 -****************************************************************************/ -void x86emuOp_mov_M_AL_IMM(u8 X86EMU_UNUSED(op1)) -{ - u16 offset; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - offset = fetch_word_imm(); - DECODE_PRINTF2("[%04x],AL\n", offset); - TRACE_AND_STEP(); - store_data_byte(offset, M.x86.R_AL); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa3 -****************************************************************************/ -void x86emuOp_mov_M_AX_IMM(u8 X86EMU_UNUSED(op1)) -{ - u16 offset; - - START_OF_INSTR(); - offset = fetch_word_imm(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF2("MOV\t[%04x],EAX\n", offset); - } else { - DECODE_PRINTF2("MOV\t[%04x],AX\n", offset); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - store_data_long(offset, M.x86.R_EAX); - } else { - store_data_word(offset, M.x86.R_AX); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa4 -****************************************************************************/ -void x86emuOp_movs_byte(u8 X86EMU_UNUSED(op1)) -{ - u8 val; - u32 count; - int inc; - - START_OF_INSTR(); - DECODE_PRINTF("MOVS\tBYTE\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -1; - else - inc = 1; - TRACE_AND_STEP(); - count = 1; - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* dont care whether REPE or REPNE */ - /* move them until CX is ZERO. */ - count = M.x86.R_CX; - M.x86.R_CX = 0; - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } - while (count--) { - val = fetch_data_byte(M.x86.R_SI); - store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, val); - M.x86.R_SI += inc; - M.x86.R_DI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa5 -****************************************************************************/ -void x86emuOp_movs_word(u8 X86EMU_UNUSED(op1)) -{ - u32 val; - int inc; - u32 count; - - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("MOVS\tDWORD\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -4; - else - inc = 4; - } else { - DECODE_PRINTF("MOVS\tWORD\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -2; - else - inc = 2; - } - TRACE_AND_STEP(); - count = 1; - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* dont care whether REPE or REPNE */ - /* move them until CX is ZERO. */ - count = M.x86.R_CX; - M.x86.R_CX = 0; - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } - while (count--) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - val = fetch_data_long(M.x86.R_SI); - store_data_long_abs(M.x86.R_ES, M.x86.R_DI, val); - } else { - val = fetch_data_word(M.x86.R_SI); - store_data_word_abs(M.x86.R_ES, M.x86.R_DI, (u16)val); - } - M.x86.R_SI += inc; - M.x86.R_DI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa6 -****************************************************************************/ -void x86emuOp_cmps_byte(u8 X86EMU_UNUSED(op1)) -{ - s8 val1, val2; - int inc; - - START_OF_INSTR(); - DECODE_PRINTF("CMPS\tBYTE\n"); - TRACE_AND_STEP(); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -1; - else - inc = 1; - - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* REPE */ - /* move them until CX is ZERO. */ - while (M.x86.R_CX != 0) { - val1 = fetch_data_byte(M.x86.R_SI); - val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI); - cmp_byte(val1, val2); - M.x86.R_CX -= 1; - M.x86.R_SI += inc; - M.x86.R_DI += inc; - if ( (M.x86.mode & SYSMODE_PREFIX_REPE) && (ACCESS_FLAG(F_ZF) == 0) ) break; - if ( (M.x86.mode & SYSMODE_PREFIX_REPNE) && ACCESS_FLAG(F_ZF) ) break; - } - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } else { - val1 = fetch_data_byte(M.x86.R_SI); - val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI); - cmp_byte(val1, val2); - M.x86.R_SI += inc; - M.x86.R_DI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa7 -****************************************************************************/ -void x86emuOp_cmps_word(u8 X86EMU_UNUSED(op1)) -{ - u32 val1,val2; - int inc; - - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("CMPS\tDWORD\n"); - inc = 4; - } else { - DECODE_PRINTF("CMPS\tWORD\n"); - inc = 2; - } - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -inc; - - TRACE_AND_STEP(); - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* REPE */ - /* move them until CX is ZERO. */ - while (M.x86.R_CX != 0) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - val1 = fetch_data_long(M.x86.R_SI); - val2 = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI); - cmp_long(val1, val2); - } else { - val1 = fetch_data_word(M.x86.R_SI); - val2 = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI); - cmp_word((u16)val1, (u16)val2); - } - M.x86.R_CX -= 1; - M.x86.R_SI += inc; - M.x86.R_DI += inc; - if ( (M.x86.mode & SYSMODE_PREFIX_REPE) && ACCESS_FLAG(F_ZF) == 0 ) break; - if ( (M.x86.mode & SYSMODE_PREFIX_REPNE) && ACCESS_FLAG(F_ZF) ) break; - } - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } else { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - val1 = fetch_data_long(M.x86.R_SI); - val2 = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI); - cmp_long(val1, val2); - } else { - val1 = fetch_data_word(M.x86.R_SI); - val2 = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI); - cmp_word((u16)val1, (u16)val2); - } - M.x86.R_SI += inc; - M.x86.R_DI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa8 -****************************************************************************/ -void x86emuOp_test_AL_IMM(u8 X86EMU_UNUSED(op1)) -{ - int imm; - - START_OF_INSTR(); - DECODE_PRINTF("TEST\tAL,"); - imm = fetch_byte_imm(); - DECODE_PRINTF2("%04x\n", imm); - TRACE_AND_STEP(); - test_byte(M.x86.R_AL, (u8)imm); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xa9 -****************************************************************************/ -void x86emuOp_test_AX_IMM(u8 X86EMU_UNUSED(op1)) -{ - u32 srcval; - - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("TEST\tEAX,"); - srcval = fetch_long_imm(); - } else { - DECODE_PRINTF("TEST\tAX,"); - srcval = fetch_word_imm(); - } - DECODE_PRINTF2("%x\n", srcval); - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - test_long(M.x86.R_EAX, srcval); - } else { - test_word(M.x86.R_AX, (u16)srcval); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xaa -****************************************************************************/ -void x86emuOp_stos_byte(u8 X86EMU_UNUSED(op1)) -{ - int inc; - - START_OF_INSTR(); - DECODE_PRINTF("STOS\tBYTE\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -1; - else - inc = 1; - TRACE_AND_STEP(); - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* dont care whether REPE or REPNE */ - /* move them until CX is ZERO. */ - while (M.x86.R_CX != 0) { - store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AL); - M.x86.R_CX -= 1; - M.x86.R_DI += inc; - } - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } else { - store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AL); - M.x86.R_DI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xab -****************************************************************************/ -void x86emuOp_stos_word(u8 X86EMU_UNUSED(op1)) -{ - int inc; - u32 count; - - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("STOS\tDWORD\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -4; - else - inc = 4; - } else { - DECODE_PRINTF("STOS\tWORD\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -2; - else - inc = 2; - } - TRACE_AND_STEP(); - count = 1; - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* dont care whether REPE or REPNE */ - /* move them until CX is ZERO. */ - count = M.x86.R_CX; - M.x86.R_CX = 0; - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } - while (count--) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - store_data_long_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_EAX); - } else { - store_data_word_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AX); - } - M.x86.R_DI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xac -****************************************************************************/ -void x86emuOp_lods_byte(u8 X86EMU_UNUSED(op1)) -{ - int inc; - - START_OF_INSTR(); - DECODE_PRINTF("LODS\tBYTE\n"); - TRACE_AND_STEP(); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -1; - else - inc = 1; - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* dont care whether REPE or REPNE */ - /* move them until CX is ZERO. */ - while (M.x86.R_CX != 0) { - M.x86.R_AL = fetch_data_byte(M.x86.R_SI); - M.x86.R_CX -= 1; - M.x86.R_SI += inc; - } - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } else { - M.x86.R_AL = fetch_data_byte(M.x86.R_SI); - M.x86.R_SI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xad -****************************************************************************/ -void x86emuOp_lods_word(u8 X86EMU_UNUSED(op1)) -{ - int inc; - u32 count; - - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("LODS\tDWORD\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -4; - else - inc = 4; - } else { - DECODE_PRINTF("LODS\tWORD\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -2; - else - inc = 2; - } - TRACE_AND_STEP(); - count = 1; - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* dont care whether REPE or REPNE */ - /* move them until CX is ZERO. */ - count = M.x86.R_CX; - M.x86.R_CX = 0; - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } - while (count--) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - M.x86.R_EAX = fetch_data_long(M.x86.R_SI); - } else { - M.x86.R_AX = fetch_data_word(M.x86.R_SI); - } - M.x86.R_SI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xae -****************************************************************************/ -void x86emuOp_scas_byte(u8 X86EMU_UNUSED(op1)) -{ - s8 val2; - int inc; - - START_OF_INSTR(); - DECODE_PRINTF("SCAS\tBYTE\n"); - TRACE_AND_STEP(); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -1; - else - inc = 1; - if (M.x86.mode & SYSMODE_PREFIX_REPE) { - /* REPE */ - /* move them until CX is ZERO. */ - while (M.x86.R_CX != 0) { - val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI); - cmp_byte(M.x86.R_AL, val2); - M.x86.R_CX -= 1; - M.x86.R_DI += inc; - if (ACCESS_FLAG(F_ZF) == 0) - break; - } - M.x86.mode &= ~SYSMODE_PREFIX_REPE; - } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) { - /* REPNE */ - /* move them until CX is ZERO. */ - while (M.x86.R_CX != 0) { - val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI); - cmp_byte(M.x86.R_AL, val2); - M.x86.R_CX -= 1; - M.x86.R_DI += inc; - if (ACCESS_FLAG(F_ZF)) - break; /* zero flag set means equal */ - } - M.x86.mode &= ~SYSMODE_PREFIX_REPNE; - } else { - val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI); - cmp_byte(M.x86.R_AL, val2); - M.x86.R_DI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xaf -****************************************************************************/ -void x86emuOp_scas_word(u8 X86EMU_UNUSED(op1)) -{ - int inc; - u32 val; - - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("SCAS\tDWORD\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -4; - else - inc = 4; - } else { - DECODE_PRINTF("SCAS\tWORD\n"); - if (ACCESS_FLAG(F_DF)) /* down */ - inc = -2; - else - inc = 2; - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_REPE) { - /* REPE */ - /* move them until CX is ZERO. */ - while (M.x86.R_CX != 0) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI); - cmp_long(M.x86.R_EAX, val); - } else { - val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI); - cmp_word(M.x86.R_AX, (u16)val); - } - M.x86.R_CX -= 1; - M.x86.R_DI += inc; - if (ACCESS_FLAG(F_ZF) == 0) - break; - } - M.x86.mode &= ~SYSMODE_PREFIX_REPE; - } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) { - /* REPNE */ - /* move them until CX is ZERO. */ - while (M.x86.R_CX != 0) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI); - cmp_long(M.x86.R_EAX, val); - } else { - val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI); - cmp_word(M.x86.R_AX, (u16)val); - } - M.x86.R_CX -= 1; - M.x86.R_DI += inc; - if (ACCESS_FLAG(F_ZF)) - break; /* zero flag set means equal */ - } - M.x86.mode &= ~SYSMODE_PREFIX_REPNE; - } else { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI); - cmp_long(M.x86.R_EAX, val); - } else { - val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI); - cmp_word(M.x86.R_AX, (u16)val); - } - M.x86.R_DI += inc; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xb0 - 0xb7 -****************************************************************************/ -void x86emuOp_mov_byte_register_IMM(u8 op1) -{ - u8 imm, *ptr; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - ptr = DECODE_RM_BYTE_REGISTER(op1 & 0x7); - DECODE_PRINTF(","); - imm = fetch_byte_imm(); - DECODE_PRINTF2("%x\n", imm); - TRACE_AND_STEP(); - *ptr = imm; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xb8 - 0xbf -****************************************************************************/ -void x86emuOp_mov_word_register_IMM(u8 X86EMU_UNUSED(op1)) -{ - u32 srcval; - - op1 &= 0x7; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *reg32; - reg32 = DECODE_RM_LONG_REGISTER(op1); - srcval = fetch_long_imm(); - DECODE_PRINTF2(",%x\n", srcval); - TRACE_AND_STEP(); - *reg32 = srcval; - } else { - u16 *reg16; - reg16 = DECODE_RM_WORD_REGISTER(op1); - srcval = fetch_word_imm(); - DECODE_PRINTF2(",%x\n", srcval); - TRACE_AND_STEP(); - *reg16 = (u16)srcval; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc0 -****************************************************************************/ -void x86emuOp_opcC0_byte_RM_MEM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg; - uint destoffset; - u8 destval; - u8 amt; - - /* - * Yet another weirdo special case instruction format. Part of - * the opcode held below in "RH". Doubly nested case would - * result, except that the decoded instruction - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - - switch (rh) { - case 0: - DECODE_PRINTF("ROL\t"); - break; - case 1: - DECODE_PRINTF("ROR\t"); - break; - case 2: - DECODE_PRINTF("RCL\t"); - break; - case 3: - DECODE_PRINTF("RCR\t"); - break; - case 4: - DECODE_PRINTF("SHL\t"); - break; - case 5: - DECODE_PRINTF("SHR\t"); - break; - case 6: - DECODE_PRINTF("SAL\t"); - break; - case 7: - DECODE_PRINTF("SAR\t"); - break; - } - } -#endif - /* know operation, decode the mod byte to find the addressing - mode. */ - if (mod < 3) { - DECODE_PRINTF("BYTE PTR "); - destoffset = decode_rmXX_address(mod, rl); - amt = fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", amt); - destval = fetch_data_byte(destoffset); - TRACE_AND_STEP(); - destval = (*opcD0_byte_operation[rh]) (destval, amt); - store_data_byte(destoffset, destval); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - amt = fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", amt); - TRACE_AND_STEP(); - destval = (*opcD0_byte_operation[rh]) (*destreg, amt); - *destreg = destval; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc1 -****************************************************************************/ -void x86emuOp_opcC1_word_RM_MEM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - u8 amt; - - /* - * Yet another weirdo special case instruction format. Part of - * the opcode held below in "RH". Doubly nested case would - * result, except that the decoded instruction - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - - switch (rh) { - case 0: - DECODE_PRINTF("ROL\t"); - break; - case 1: - DECODE_PRINTF("ROR\t"); - break; - case 2: - DECODE_PRINTF("RCL\t"); - break; - case 3: - DECODE_PRINTF("RCR\t"); - break; - case 4: - DECODE_PRINTF("SHL\t"); - break; - case 5: - DECODE_PRINTF("SHR\t"); - break; - case 6: - DECODE_PRINTF("SAL\t"); - break; - case 7: - DECODE_PRINTF("SAR\t"); - break; - } - } -#endif - /* know operation, decode the mod byte to find the addressing - mode. */ - if (mod < 3) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - - DECODE_PRINTF("DWORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - amt = fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", amt); - destval = fetch_data_long(destoffset); - TRACE_AND_STEP(); - destval = (*opcD1_long_operation[rh]) (destval, amt); - store_data_long(destoffset, destval); - } else { - u16 destval; - - DECODE_PRINTF("WORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - amt = fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", amt); - destval = fetch_data_word(destoffset); - TRACE_AND_STEP(); - destval = (*opcD1_word_operation[rh]) (destval, amt); - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - amt = fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", amt); - TRACE_AND_STEP(); - *destreg = (*opcD1_long_operation[rh]) (*destreg, amt); - } else { - u16 *destreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - amt = fetch_byte_imm(); - DECODE_PRINTF2(",%x\n", amt); - TRACE_AND_STEP(); - *destreg = (*opcD1_word_operation[rh]) (*destreg, amt); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc2 -****************************************************************************/ -void x86emuOp_ret_near_IMM(u8 X86EMU_UNUSED(op1)) -{ - u16 imm; - - START_OF_INSTR(); - DECODE_PRINTF("RET\t"); - imm = fetch_word_imm(); - DECODE_PRINTF2("%x\n", imm); - RETURN_TRACE("RET",M.x86.saved_cs,M.x86.saved_ip); - TRACE_AND_STEP(); - M.x86.R_IP = pop_word(); - M.x86.R_SP += imm; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc3 -****************************************************************************/ -void x86emuOp_ret_near(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("RET\n"); - RETURN_TRACE("RET",M.x86.saved_cs,M.x86.saved_ip); - TRACE_AND_STEP(); - M.x86.R_IP = pop_word(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc4 -****************************************************************************/ -void x86emuOp_les_R_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rh, rl; - u16 *dstreg; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("LES\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - dstreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *dstreg = fetch_data_word(srcoffset); - M.x86.R_ES = fetch_data_word(srcoffset + 2); - } - /* else UNDEFINED! register to register */ - - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc5 -****************************************************************************/ -void x86emuOp_lds_R_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rh, rl; - u16 *dstreg; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("LDS\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - dstreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *dstreg = fetch_data_word(srcoffset); - M.x86.R_DS = fetch_data_word(srcoffset + 2); - } - /* else UNDEFINED! */ - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc6 -****************************************************************************/ -void x86emuOp_mov_byte_RM_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg; - uint destoffset; - u8 imm; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (rh != 0) { - DECODE_PRINTF("ILLEGAL DECODE OF OPCODE c6\n"); - HALT_SYS(); - } - if (mod < 3) { - DECODE_PRINTF("BYTE PTR "); - destoffset = decode_rmXX_address(mod, rl); - imm = fetch_byte_imm(); - DECODE_PRINTF2(",%2x\n", imm); - TRACE_AND_STEP(); - store_data_byte(destoffset, imm); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - imm = fetch_byte_imm(); - DECODE_PRINTF2(",%2x\n", imm); - TRACE_AND_STEP(); - *destreg = imm; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc7 -****************************************************************************/ -void x86emuOp_mov_word_RM_IMM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - - START_OF_INSTR(); - DECODE_PRINTF("MOV\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (rh != 0) { - DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n"); - HALT_SYS(); - } - if (mod < 3) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 imm; - - DECODE_PRINTF("DWORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - imm = fetch_long_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - store_data_long(destoffset, imm); - } else { - u16 imm; - - DECODE_PRINTF("WORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - imm = fetch_word_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - store_data_word(destoffset, imm); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 imm; - - destreg = DECODE_RM_LONG_REGISTER(rl); - imm = fetch_long_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - *destreg = imm; - } else { - u16 *destreg; - u16 imm; - - destreg = DECODE_RM_WORD_REGISTER(rl); - imm = fetch_word_imm(); - DECODE_PRINTF2(",%x\n", imm); - TRACE_AND_STEP(); - *destreg = imm; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc8 -****************************************************************************/ -void x86emuOp_enter(u8 X86EMU_UNUSED(op1)) -{ - u16 local,frame_pointer; - u8 nesting; - int i; - - START_OF_INSTR(); - local = fetch_word_imm(); - nesting = fetch_byte_imm(); - DECODE_PRINTF2("ENTER %x\n", local); - DECODE_PRINTF2(",%x\n", nesting); - TRACE_AND_STEP(); - push_word(M.x86.R_BP); - frame_pointer = M.x86.R_SP; - if (nesting > 0) { - for (i = 1; i < nesting; i++) { - M.x86.R_BP -= 2; - push_word(fetch_data_word_abs(M.x86.R_SS, M.x86.R_BP)); - } - push_word(frame_pointer); - } - M.x86.R_BP = frame_pointer; - M.x86.R_SP = (u16)(M.x86.R_SP - local); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xc9 -****************************************************************************/ -void x86emuOp_leave(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("LEAVE\n"); - TRACE_AND_STEP(); - M.x86.R_SP = M.x86.R_BP; - M.x86.R_BP = pop_word(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xca -****************************************************************************/ -void x86emuOp_ret_far_IMM(u8 X86EMU_UNUSED(op1)) -{ - u16 imm; - - START_OF_INSTR(); - DECODE_PRINTF("RETF\t"); - imm = fetch_word_imm(); - DECODE_PRINTF2("%x\n", imm); - RETURN_TRACE("RETF",M.x86.saved_cs,M.x86.saved_ip); - TRACE_AND_STEP(); - M.x86.R_IP = pop_word(); - M.x86.R_CS = pop_word(); - M.x86.R_SP += imm; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xcb -****************************************************************************/ -void x86emuOp_ret_far(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("RETF\n"); - RETURN_TRACE("RETF",M.x86.saved_cs,M.x86.saved_ip); - TRACE_AND_STEP(); - M.x86.R_IP = pop_word(); - M.x86.R_CS = pop_word(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xcc -****************************************************************************/ -void x86emuOp_int3(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("INT 3\n"); - (void)mem_access_word(3 * 4 + 2); - /* access the segment register */ - TRACE_AND_STEP(); - if (_X86EMU_intrTab[3]) { - (*_X86EMU_intrTab[3])(3); - } else { - push_word((u16)M.x86.R_FLG); - CLEAR_FLAG(F_IF); - CLEAR_FLAG(F_TF); - push_word(M.x86.R_CS); - M.x86.R_CS = mem_access_word(3 * 4 + 2); - push_word(M.x86.R_IP); - M.x86.R_IP = mem_access_word(3 * 4); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xcd -****************************************************************************/ -void x86emuOp_int_IMM(u8 X86EMU_UNUSED(op1)) -{ - u8 intnum; - - START_OF_INSTR(); - DECODE_PRINTF("INT\t"); - intnum = fetch_byte_imm(); - DECODE_PRINTF2("%x\n", intnum); - (void)mem_access_word(intnum * 4 + 2); - TRACE_AND_STEP(); - if (_X86EMU_intrTab[intnum]) { - (*_X86EMU_intrTab[intnum])(intnum); - } else { - push_word((u16)M.x86.R_FLG); - CLEAR_FLAG(F_IF); - CLEAR_FLAG(F_TF); - push_word(M.x86.R_CS); - M.x86.R_CS = mem_access_word(intnum * 4 + 2); - push_word(M.x86.R_IP); - M.x86.R_IP = mem_access_word(intnum * 4); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xce -****************************************************************************/ -void x86emuOp_into(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("INTO\n"); - TRACE_AND_STEP(); - if (ACCESS_FLAG(F_OF)) { - (void)mem_access_word(4 * 4 + 2); - if (_X86EMU_intrTab[4]) { - (*_X86EMU_intrTab[4])(4); - } else { - push_word((u16)M.x86.R_FLG); - CLEAR_FLAG(F_IF); - CLEAR_FLAG(F_TF); - push_word(M.x86.R_CS); - M.x86.R_CS = mem_access_word(4 * 4 + 2); - push_word(M.x86.R_IP); - M.x86.R_IP = mem_access_word(4 * 4); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xcf -****************************************************************************/ -void x86emuOp_iret(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("IRET\n"); - - TRACE_AND_STEP(); - - M.x86.R_IP = pop_word(); - M.x86.R_CS = pop_word(); - M.x86.R_FLG = pop_word(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xd0 -****************************************************************************/ -void x86emuOp_opcD0_byte_RM_1(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg; - uint destoffset; - u8 destval; - - /* - * Yet another weirdo special case instruction format. Part of - * the opcode held below in "RH". Doubly nested case would - * result, except that the decoded instruction - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - switch (rh) { - case 0: - DECODE_PRINTF("ROL\t"); - break; - case 1: - DECODE_PRINTF("ROR\t"); - break; - case 2: - DECODE_PRINTF("RCL\t"); - break; - case 3: - DECODE_PRINTF("RCR\t"); - break; - case 4: - DECODE_PRINTF("SHL\t"); - break; - case 5: - DECODE_PRINTF("SHR\t"); - break; - case 6: - DECODE_PRINTF("SAL\t"); - break; - case 7: - DECODE_PRINTF("SAR\t"); - break; - } - } -#endif - /* know operation, decode the mod byte to find the addressing - mode. */ - if (mod < 3) { - DECODE_PRINTF("BYTE PTR "); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(",1\n"); - destval = fetch_data_byte(destoffset); - TRACE_AND_STEP(); - destval = (*opcD0_byte_operation[rh]) (destval, 1); - store_data_byte(destoffset, destval); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF(",1\n"); - TRACE_AND_STEP(); - destval = (*opcD0_byte_operation[rh]) (*destreg, 1); - *destreg = destval; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xd1 -****************************************************************************/ -void x86emuOp_opcD1_word_RM_1(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - - /* - * Yet another weirdo special case instruction format. Part of - * the opcode held below in "RH". Doubly nested case would - * result, except that the decoded instruction - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - switch (rh) { - case 0: - DECODE_PRINTF("ROL\t"); - break; - case 1: - DECODE_PRINTF("ROR\t"); - break; - case 2: - DECODE_PRINTF("RCL\t"); - break; - case 3: - DECODE_PRINTF("RCR\t"); - break; - case 4: - DECODE_PRINTF("SHL\t"); - break; - case 5: - DECODE_PRINTF("SHR\t"); - break; - case 6: - DECODE_PRINTF("SAL\t"); - break; - case 7: - DECODE_PRINTF("SAR\t"); - break; - } - } -#endif - /* know operation, decode the mod byte to find the addressing - mode. */ - if (mod < 3) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - - DECODE_PRINTF("DWORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(",1\n"); - destval = fetch_data_long(destoffset); - TRACE_AND_STEP(); - destval = (*opcD1_long_operation[rh]) (destval, 1); - store_data_long(destoffset, destval); - } else { - u16 destval; - - DECODE_PRINTF("WORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(",1\n"); - destval = fetch_data_word(destoffset); - TRACE_AND_STEP(); - destval = (*opcD1_word_operation[rh]) (destval, 1); - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - u32 *destreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(",1\n"); - TRACE_AND_STEP(); - destval = (*opcD1_long_operation[rh]) (*destreg, 1); - *destreg = destval; - } else { - u16 destval; - u16 *destreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(",1\n"); - TRACE_AND_STEP(); - destval = (*opcD1_word_operation[rh]) (*destreg, 1); - *destreg = destval; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xd2 -****************************************************************************/ -void x86emuOp_opcD2_byte_RM_CL(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg; - uint destoffset; - u8 destval; - u8 amt; - - /* - * Yet another weirdo special case instruction format. Part of - * the opcode held below in "RH". Doubly nested case would - * result, except that the decoded instruction - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - switch (rh) { - case 0: - DECODE_PRINTF("ROL\t"); - break; - case 1: - DECODE_PRINTF("ROR\t"); - break; - case 2: - DECODE_PRINTF("RCL\t"); - break; - case 3: - DECODE_PRINTF("RCR\t"); - break; - case 4: - DECODE_PRINTF("SHL\t"); - break; - case 5: - DECODE_PRINTF("SHR\t"); - break; - case 6: - DECODE_PRINTF("SAL\t"); - break; - case 7: - DECODE_PRINTF("SAR\t"); - break; - } - } -#endif - /* know operation, decode the mod byte to find the addressing - mode. */ - amt = M.x86.R_CL; - if (mod < 3) { - DECODE_PRINTF("BYTE PTR "); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(",CL\n"); - destval = fetch_data_byte(destoffset); - TRACE_AND_STEP(); - destval = (*opcD0_byte_operation[rh]) (destval, amt); - store_data_byte(destoffset, destval); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - destval = (*opcD0_byte_operation[rh]) (*destreg, amt); - *destreg = destval; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xd3 -****************************************************************************/ -void x86emuOp_opcD3_word_RM_CL(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - u8 amt; - - /* - * Yet another weirdo special case instruction format. Part of - * the opcode held below in "RH". Doubly nested case would - * result, except that the decoded instruction - */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - switch (rh) { - case 0: - DECODE_PRINTF("ROL\t"); - break; - case 1: - DECODE_PRINTF("ROR\t"); - break; - case 2: - DECODE_PRINTF("RCL\t"); - break; - case 3: - DECODE_PRINTF("RCR\t"); - break; - case 4: - DECODE_PRINTF("SHL\t"); - break; - case 5: - DECODE_PRINTF("SHR\t"); - break; - case 6: - DECODE_PRINTF("SAL\t"); - break; - case 7: - DECODE_PRINTF("SAR\t"); - break; - } - } -#endif - /* know operation, decode the mod byte to find the addressing - mode. */ - amt = M.x86.R_CL; - if (mod < 3) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - - DECODE_PRINTF("DWORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(",CL\n"); - destval = fetch_data_long(destoffset); - TRACE_AND_STEP(); - destval = (*opcD1_long_operation[rh]) (destval, amt); - store_data_long(destoffset, destval); - } else { - u16 destval; - - DECODE_PRINTF("WORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(",CL\n"); - destval = fetch_data_word(destoffset); - TRACE_AND_STEP(); - destval = (*opcD1_word_operation[rh]) (destval, amt); - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - *destreg = (*opcD1_long_operation[rh]) (*destreg, amt); - } else { - u16 *destreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - *destreg = (*opcD1_word_operation[rh]) (*destreg, amt); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xd4 -****************************************************************************/ -void x86emuOp_aam(u8 X86EMU_UNUSED(op1)) -{ - u8 a; - - START_OF_INSTR(); - DECODE_PRINTF("AAM\n"); - a = fetch_byte_imm(); /* this is a stupid encoding. */ - if (a != 10) { - DECODE_PRINTF("ERROR DECODING AAM\n"); - TRACE_REGS(); - HALT_SYS(); - } - TRACE_AND_STEP(); - /* note the type change here --- returning AL and AH in AX. */ - M.x86.R_AX = aam_word(M.x86.R_AL); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xd5 -****************************************************************************/ -void x86emuOp_aad(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("AAD\n"); - (void)fetch_byte_imm(); - TRACE_AND_STEP(); - M.x86.R_AX = aad_word(M.x86.R_AX); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/* opcode 0xd6 ILLEGAL OPCODE */ - -/**************************************************************************** -REMARKS: -Handles opcode 0xd7 -****************************************************************************/ -void x86emuOp_xlat(u8 X86EMU_UNUSED(op1)) -{ - u16 addr; - - START_OF_INSTR(); - DECODE_PRINTF("XLAT\n"); - TRACE_AND_STEP(); - addr = (u16)(M.x86.R_BX + (u8)M.x86.R_AL); - M.x86.R_AL = fetch_data_byte(addr); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/* instuctions D8 .. DF are in i87_ops.c */ - -/**************************************************************************** -REMARKS: -Handles opcode 0xe0 -****************************************************************************/ -void x86emuOp_loopne(u8 X86EMU_UNUSED(op1)) -{ - s16 ip; - - START_OF_INSTR(); - DECODE_PRINTF("LOOPNE\t"); - ip = (s8) fetch_byte_imm(); - ip += (s16) M.x86.R_IP; - DECODE_PRINTF2("%04x\n", ip); - TRACE_AND_STEP(); - M.x86.R_CX -= 1; - if (M.x86.R_CX != 0 && !ACCESS_FLAG(F_ZF)) /* CX != 0 and !ZF */ - M.x86.R_IP = ip; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xe1 -****************************************************************************/ -void x86emuOp_loope(u8 X86EMU_UNUSED(op1)) -{ - s16 ip; - - START_OF_INSTR(); - DECODE_PRINTF("LOOPE\t"); - ip = (s8) fetch_byte_imm(); - ip += (s16) M.x86.R_IP; - DECODE_PRINTF2("%04x\n", ip); - TRACE_AND_STEP(); - M.x86.R_CX -= 1; - if (M.x86.R_CX != 0 && ACCESS_FLAG(F_ZF)) /* CX != 0 and ZF */ - M.x86.R_IP = ip; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xe2 -****************************************************************************/ -void x86emuOp_loop(u8 X86EMU_UNUSED(op1)) -{ - s16 ip; - - START_OF_INSTR(); - DECODE_PRINTF("LOOP\t"); - ip = (s8) fetch_byte_imm(); - ip += (s16) M.x86.R_IP; - DECODE_PRINTF2("%04x\n", ip); - TRACE_AND_STEP(); - M.x86.R_CX -= 1; - if (M.x86.R_CX != 0) - M.x86.R_IP = ip; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xe3 -****************************************************************************/ -void x86emuOp_jcxz(u8 X86EMU_UNUSED(op1)) -{ - u16 target; - s8 offset; - - /* jump to byte offset if overflow flag is set */ - START_OF_INSTR(); - DECODE_PRINTF("JCXZ\t"); - offset = (s8)fetch_byte_imm(); - target = (u16)(M.x86.R_IP + offset); - DECODE_PRINTF2("%x\n", target); - TRACE_AND_STEP(); - if (M.x86.R_CX == 0) - M.x86.R_IP = target; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xe4 -****************************************************************************/ -void x86emuOp_in_byte_AL_IMM(u8 X86EMU_UNUSED(op1)) -{ - u8 port; - - START_OF_INSTR(); - DECODE_PRINTF("IN\t"); - port = (u8) fetch_byte_imm(); - DECODE_PRINTF2("%x,AL\n", port); - TRACE_AND_STEP(); - M.x86.R_AL = (*sys_inb)(port); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xe5 -****************************************************************************/ -void x86emuOp_in_word_AX_IMM(u8 X86EMU_UNUSED(op1)) -{ - u8 port; - - START_OF_INSTR(); - DECODE_PRINTF("IN\t"); - port = (u8) fetch_byte_imm(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF2("EAX,%x\n", port); - } else { - DECODE_PRINTF2("AX,%x\n", port); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - M.x86.R_EAX = (*sys_inl)(port); - } else { - M.x86.R_AX = (*sys_inw)(port); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xe6 -****************************************************************************/ -void x86emuOp_out_byte_IMM_AL(u8 X86EMU_UNUSED(op1)) -{ - u8 port; - - START_OF_INSTR(); - DECODE_PRINTF("OUT\t"); - port = (u8) fetch_byte_imm(); - DECODE_PRINTF2("%x,AL\n", port); - TRACE_AND_STEP(); - (*sys_outb)(port, M.x86.R_AL); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xe7 -****************************************************************************/ -void x86emuOp_out_word_IMM_AX(u8 X86EMU_UNUSED(op1)) -{ - u8 port; - - START_OF_INSTR(); - DECODE_PRINTF("OUT\t"); - port = (u8) fetch_byte_imm(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF2("%x,EAX\n", port); - } else { - DECODE_PRINTF2("%x,AX\n", port); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - (*sys_outl)(port, M.x86.R_EAX); - } else { - (*sys_outw)(port, M.x86.R_AX); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xe8 -****************************************************************************/ -void x86emuOp_call_near_IMM(u8 X86EMU_UNUSED(op1)) -{ - s16 ip; - - START_OF_INSTR(); - DECODE_PRINTF("CALL\t"); - ip = (s16) fetch_word_imm(); - ip += (s16) M.x86.R_IP; /* CHECK SIGN */ - DECODE_PRINTF2("%04x\n", ip); - CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, ip, ""); - TRACE_AND_STEP(); - push_word(M.x86.R_IP); - M.x86.R_IP = ip; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xe9 -****************************************************************************/ -void x86emuOp_jump_near_IMM(u8 X86EMU_UNUSED(op1)) -{ - int ip; - - START_OF_INSTR(); - DECODE_PRINTF("JMP\t"); - ip = (s16)fetch_word_imm(); - ip += (s16)M.x86.R_IP; - DECODE_PRINTF2("%04x\n", ip); - TRACE_AND_STEP(); - M.x86.R_IP = (u16)ip; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xea -****************************************************************************/ -void x86emuOp_jump_far_IMM(u8 X86EMU_UNUSED(op1)) -{ - u16 cs, ip; - - START_OF_INSTR(); - DECODE_PRINTF("JMP\tFAR "); - ip = fetch_word_imm(); - cs = fetch_word_imm(); - DECODE_PRINTF2("%04x:", cs); - DECODE_PRINTF2("%04x\n", ip); - TRACE_AND_STEP(); - M.x86.R_IP = ip; - M.x86.R_CS = cs; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xeb -****************************************************************************/ -void x86emuOp_jump_byte_IMM(u8 X86EMU_UNUSED(op1)) -{ - u16 target; - s8 offset; - - START_OF_INSTR(); - DECODE_PRINTF("JMP\t"); - offset = (s8)fetch_byte_imm(); - target = (u16)(M.x86.R_IP + offset); - DECODE_PRINTF2("%x\n", target); - TRACE_AND_STEP(); - M.x86.R_IP = target; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xec -****************************************************************************/ -void x86emuOp_in_byte_AL_DX(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("IN\tAL,DX\n"); - TRACE_AND_STEP(); - M.x86.R_AL = (*sys_inb)(M.x86.R_DX); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xed -****************************************************************************/ -void x86emuOp_in_word_AX_DX(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("IN\tEAX,DX\n"); - } else { - DECODE_PRINTF("IN\tAX,DX\n"); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - M.x86.R_EAX = (*sys_inl)(M.x86.R_DX); - } else { - M.x86.R_AX = (*sys_inw)(M.x86.R_DX); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xee -****************************************************************************/ -void x86emuOp_out_byte_DX_AL(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("OUT\tDX,AL\n"); - TRACE_AND_STEP(); - (*sys_outb)(M.x86.R_DX, M.x86.R_AL); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xef -****************************************************************************/ -void x86emuOp_out_word_DX_AX(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("OUT\tDX,EAX\n"); - } else { - DECODE_PRINTF("OUT\tDX,AX\n"); - } - TRACE_AND_STEP(); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - (*sys_outl)(M.x86.R_DX, M.x86.R_EAX); - } else { - (*sys_outw)(M.x86.R_DX, M.x86.R_AX); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xf0 -****************************************************************************/ -void x86emuOp_lock(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("LOCK:\n"); - TRACE_AND_STEP(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/*opcode 0xf1 ILLEGAL OPERATION */ - -/**************************************************************************** -REMARKS: -Handles opcode 0xf2 -****************************************************************************/ -void x86emuOp_repne(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("REPNE\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_PREFIX_REPNE; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xf3 -****************************************************************************/ -void x86emuOp_repe(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("REPE\n"); - TRACE_AND_STEP(); - M.x86.mode |= SYSMODE_PREFIX_REPE; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xf4 -****************************************************************************/ -void x86emuOp_halt(u8 X86EMU_UNUSED(op1)) -{ - START_OF_INSTR(); - DECODE_PRINTF("HALT\n"); - TRACE_AND_STEP(); - HALT_SYS(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xf5 -****************************************************************************/ -void x86emuOp_cmc(u8 X86EMU_UNUSED(op1)) -{ - /* complement the carry flag. */ - START_OF_INSTR(); - DECODE_PRINTF("CMC\n"); - TRACE_AND_STEP(); - TOGGLE_FLAG(F_CF); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xf6 -****************************************************************************/ -void x86emuOp_opcF6_byte_RM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - u8 *destreg; - uint destoffset; - u8 destval, srcval; - - /* long, drawn out code follows. Double switch for a total - of 32 cases. */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); - DECODE_PRINTF(opF6_names[rh]); - if (mod < 3) { - DECODE_PRINTF("BYTE PTR "); - destoffset = decode_rmXX_address(mod, rl); - destval = fetch_data_byte(destoffset); - - switch (rh) { - case 0: /* test byte imm */ - DECODE_PRINTF(","); - srcval = fetch_byte_imm(); - DECODE_PRINTF2("%02x\n", srcval); - TRACE_AND_STEP(); - test_byte(destval, srcval); - break; - case 1: - DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n"); - HALT_SYS(); - break; - case 2: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = not_byte(destval); - store_data_byte(destoffset, destval); - break; - case 3: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = neg_byte(destval); - store_data_byte(destoffset, destval); - break; - case 4: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - mul_byte(destval); - break; - case 5: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - imul_byte(destval); - break; - case 6: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - div_byte(destval); - break; - default: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - idiv_byte(destval); - break; - } - } else { /* mod=11 */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - switch (rh) { - case 0: /* test byte imm */ - DECODE_PRINTF(","); - srcval = fetch_byte_imm(); - DECODE_PRINTF2("%02x\n", srcval); - TRACE_AND_STEP(); - test_byte(*destreg, srcval); - break; - case 1: - DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n"); - HALT_SYS(); - break; - case 2: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = not_byte(*destreg); - break; - case 3: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = neg_byte(*destreg); - break; - case 4: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - mul_byte(*destreg); /*!!! */ - break; - case 5: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - imul_byte(*destreg); - break; - case 6: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - div_byte(*destreg); - break; - default: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - idiv_byte(*destreg); - break; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xf7 -****************************************************************************/ -void x86emuOp_opcF7_word_RM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rl, rh; - uint destoffset; - - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); - DECODE_PRINTF(opF6_names[rh]); - if (mod < 3) { - - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval, srcval; - - DECODE_PRINTF("DWORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - destval = fetch_data_long(destoffset); - - switch (rh) { - case 0: - DECODE_PRINTF(","); - srcval = fetch_long_imm(); - DECODE_PRINTF2("%x\n", srcval); - TRACE_AND_STEP(); - test_long(destval, srcval); - break; - case 1: - DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n"); - HALT_SYS(); - break; - case 2: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = not_long(destval); - store_data_long(destoffset, destval); - break; - case 3: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = neg_long(destval); - store_data_long(destoffset, destval); - break; - case 4: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - mul_long(destval); - break; - case 5: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - imul_long(destval); - break; - case 6: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - div_long(destval); - break; - case 7: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - idiv_long(destval); - break; - } - } else { - u16 destval, srcval; - - DECODE_PRINTF("WORD PTR "); - destoffset = decode_rmXX_address(mod, rl); - destval = fetch_data_word(destoffset); - - switch (rh) { - case 0: /* test word imm */ - DECODE_PRINTF(","); - srcval = fetch_word_imm(); - DECODE_PRINTF2("%x\n", srcval); - TRACE_AND_STEP(); - test_word(destval, srcval); - break; - case 1: - DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n"); - HALT_SYS(); - break; - case 2: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = not_word(destval); - store_data_word(destoffset, destval); - break; - case 3: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - destval = neg_word(destval); - store_data_word(destoffset, destval); - break; - case 4: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - mul_word(destval); - break; - case 5: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - imul_word(destval); - break; - case 6: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - div_word(destval); - break; - case 7: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - idiv_word(destval); - break; - } - } - - } else { /* mod=11 */ - - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 srcval; - - destreg = DECODE_RM_LONG_REGISTER(rl); - - switch (rh) { - case 0: /* test word imm */ - DECODE_PRINTF(","); - srcval = fetch_long_imm(); - DECODE_PRINTF2("%x\n", srcval); - TRACE_AND_STEP(); - test_long(*destreg, srcval); - break; - case 1: - DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n"); - HALT_SYS(); - break; - case 2: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = not_long(*destreg); - break; - case 3: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = neg_long(*destreg); - break; - case 4: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - mul_long(*destreg); /*!!! */ - break; - case 5: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - imul_long(*destreg); - break; - case 6: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - div_long(*destreg); - break; - case 7: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - idiv_long(*destreg); - break; - } - } else { - u16 *destreg; - u16 srcval; - - destreg = DECODE_RM_WORD_REGISTER(rl); - - switch (rh) { - case 0: /* test word imm */ - DECODE_PRINTF(","); - srcval = fetch_word_imm(); - DECODE_PRINTF2("%x\n", srcval); - TRACE_AND_STEP(); - test_word(*destreg, srcval); - break; - case 1: - DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n"); - HALT_SYS(); - break; - case 2: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = not_word(*destreg); - break; - case 3: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = neg_word(*destreg); - break; - case 4: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - mul_word(*destreg); /*!!! */ - break; - case 5: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - imul_word(*destreg); - break; - case 6: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - div_word(*destreg); - break; - case 7: - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - idiv_word(*destreg); - break; - } - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xf8 -****************************************************************************/ -void x86emuOp_clc(u8 X86EMU_UNUSED(op1)) -{ - /* clear the carry flag. */ - START_OF_INSTR(); - DECODE_PRINTF("CLC\n"); - TRACE_AND_STEP(); - CLEAR_FLAG(F_CF); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xf9 -****************************************************************************/ -void x86emuOp_stc(u8 X86EMU_UNUSED(op1)) -{ - /* set the carry flag. */ - START_OF_INSTR(); - DECODE_PRINTF("STC\n"); - TRACE_AND_STEP(); - SET_FLAG(F_CF); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xfa -****************************************************************************/ -void x86emuOp_cli(u8 X86EMU_UNUSED(op1)) -{ - /* clear interrupts. */ - START_OF_INSTR(); - DECODE_PRINTF("CLI\n"); - TRACE_AND_STEP(); - CLEAR_FLAG(F_IF); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xfb -****************************************************************************/ -void x86emuOp_sti(u8 X86EMU_UNUSED(op1)) -{ - /* enable interrupts. */ - START_OF_INSTR(); - DECODE_PRINTF("STI\n"); - TRACE_AND_STEP(); - SET_FLAG(F_IF); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xfc -****************************************************************************/ -void x86emuOp_cld(u8 X86EMU_UNUSED(op1)) -{ - /* clear interrupts. */ - START_OF_INSTR(); - DECODE_PRINTF("CLD\n"); - TRACE_AND_STEP(); - CLEAR_FLAG(F_DF); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xfd -****************************************************************************/ -void x86emuOp_std(u8 X86EMU_UNUSED(op1)) -{ - /* clear interrupts. */ - START_OF_INSTR(); - DECODE_PRINTF("STD\n"); - TRACE_AND_STEP(); - SET_FLAG(F_DF); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xfe -****************************************************************************/ -void x86emuOp_opcFE_byte_RM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rh, rl; - u8 destval; - uint destoffset; - u8 *destreg; - - /* Yet another special case instruction. */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - - switch (rh) { - case 0: - DECODE_PRINTF("INC\t"); - break; - case 1: - DECODE_PRINTF("DEC\t"); - break; - case 2: - case 3: - case 4: - case 5: - case 6: - case 7: - DECODE_PRINTF2("ILLEGAL OP MAJOR OP 0xFE MINOR OP %x \n", mod); - HALT_SYS(); - break; - } - } -#endif - if (mod < 3) { - DECODE_PRINTF("BYTE PTR "); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF("\n"); - destval = fetch_data_byte(destoffset); - TRACE_AND_STEP(); - if (rh == 0) - destval = inc_byte(destval); - else - destval = dec_byte(destval); - store_data_byte(destoffset, destval); - } else { - destreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - if (rh == 0) - *destreg = inc_byte(*destreg); - else - *destreg = dec_byte(*destreg); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0xff -****************************************************************************/ -void x86emuOp_opcFF_word_RM(u8 X86EMU_UNUSED(op1)) -{ - int mod, rh, rl; - uint destoffset = 0; - u16 *destreg; - u16 destval,destval2; - - /* Yet another special case instruction. */ - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); -#ifdef DEBUG - if (DEBUG_DECODE()) { - /* XXX DECODE_PRINTF may be changed to something more - general, so that it is important to leave the strings - in the same format, even though the result is that the - above test is done twice. */ - - switch (rh) { - case 0: - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("INC\tDWORD PTR "); - } else { - DECODE_PRINTF("INC\tWORD PTR "); - } - break; - case 1: - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - DECODE_PRINTF("DEC\tDWORD PTR "); - } else { - DECODE_PRINTF("DEC\tWORD PTR "); - } - break; - case 2: - DECODE_PRINTF("CALL\t "); - break; - case 3: - DECODE_PRINTF("CALL\tFAR "); - break; - case 4: - DECODE_PRINTF("JMP\t"); - break; - case 5: - DECODE_PRINTF("JMP\tFAR "); - break; - case 6: - DECODE_PRINTF("PUSH\t"); - break; - case 7: - DECODE_PRINTF("ILLEGAL DECODING OF OPCODE FF\t"); - HALT_SYS(); - break; - } - } -#endif - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF("\n"); - switch (rh) { - case 0: /* inc word ptr ... */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - - destval = fetch_data_long(destoffset); - TRACE_AND_STEP(); - destval = inc_long(destval); - store_data_long(destoffset, destval); - } else { - u16 destval; - - destval = fetch_data_word(destoffset); - TRACE_AND_STEP(); - destval = inc_word(destval); - store_data_word(destoffset, destval); - } - break; - case 1: /* dec word ptr ... */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - - destval = fetch_data_long(destoffset); - TRACE_AND_STEP(); - destval = dec_long(destval); - store_data_long(destoffset, destval); - } else { - u16 destval; - - destval = fetch_data_word(destoffset); - TRACE_AND_STEP(); - destval = dec_word(destval); - store_data_word(destoffset, destval); - } - break; - case 2: /* call word ptr ... */ - destval = fetch_data_word(destoffset); - TRACE_AND_STEP(); - push_word(M.x86.R_IP); - M.x86.R_IP = destval; - break; - case 3: /* call far ptr ... */ - destval = fetch_data_word(destoffset); - destval2 = fetch_data_word(destoffset + 2); - TRACE_AND_STEP(); - push_word(M.x86.R_CS); - M.x86.R_CS = destval2; - push_word(M.x86.R_IP); - M.x86.R_IP = destval; - break; - case 4: /* jmp word ptr ... */ - destval = fetch_data_word(destoffset); - TRACE_AND_STEP(); - M.x86.R_IP = destval; - break; - case 5: /* jmp far ptr ... */ - destval = fetch_data_word(destoffset); - destval2 = fetch_data_word(destoffset + 2); - TRACE_AND_STEP(); - M.x86.R_IP = destval; - M.x86.R_CS = destval2; - break; - case 6: /* push word ptr ... */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - - destval = fetch_data_long(destoffset); - TRACE_AND_STEP(); - push_long(destval); - } else { - u16 destval; - - destval = fetch_data_word(destoffset); - TRACE_AND_STEP(); - push_word(destval); - } - break; - } - } else { - switch (rh) { - case 0: - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = inc_long(*destreg); - } else { - u16 *destreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = inc_word(*destreg); - } - break; - case 1: - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = dec_long(*destreg); - } else { - u16 *destreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = dec_word(*destreg); - } - break; - case 2: /* call word ptr ... */ - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - push_word(M.x86.R_IP); - M.x86.R_IP = *destreg; - break; - case 3: /* jmp far ptr ... */ - DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n"); - TRACE_AND_STEP(); - HALT_SYS(); - break; - - case 4: /* jmp ... */ - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - M.x86.R_IP = (u16) (*destreg); - break; - case 5: /* jmp far ptr ... */ - DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n"); - TRACE_AND_STEP(); - HALT_SYS(); - break; - case 6: - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - push_long(*destreg); - } else { - u16 *destreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - push_word(*destreg); - } - break; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/*************************************************************************** - * Single byte operation code table: - **************************************************************************/ -void (*x86emu_optab[256])(u8) = -{ -/* 0x00 */ x86emuOp_genop_byte_RM_R, -/* 0x01 */ x86emuOp_genop_word_RM_R, -/* 0x02 */ x86emuOp_genop_byte_R_RM, -/* 0x03 */ x86emuOp_genop_word_R_RM, -/* 0x04 */ x86emuOp_genop_byte_AL_IMM, -/* 0x05 */ x86emuOp_genop_word_AX_IMM, -/* 0x06 */ x86emuOp_push_ES, -/* 0x07 */ x86emuOp_pop_ES, - -/* 0x08 */ x86emuOp_genop_byte_RM_R, -/* 0x09 */ x86emuOp_genop_word_RM_R, -/* 0x0a */ x86emuOp_genop_byte_R_RM, -/* 0x0b */ x86emuOp_genop_word_R_RM, -/* 0x0c */ x86emuOp_genop_byte_AL_IMM, -/* 0x0d */ x86emuOp_genop_word_AX_IMM, -/* 0x0e */ x86emuOp_push_CS, -/* 0x0f */ x86emuOp_two_byte, - -/* 0x10 */ x86emuOp_genop_byte_RM_R, -/* 0x11 */ x86emuOp_genop_word_RM_R, -/* 0x12 */ x86emuOp_genop_byte_R_RM, -/* 0x13 */ x86emuOp_genop_word_R_RM, -/* 0x14 */ x86emuOp_genop_byte_AL_IMM, -/* 0x15 */ x86emuOp_genop_word_AX_IMM, -/* 0x16 */ x86emuOp_push_SS, -/* 0x17 */ x86emuOp_pop_SS, - -/* 0x18 */ x86emuOp_genop_byte_RM_R, -/* 0x19 */ x86emuOp_genop_word_RM_R, -/* 0x1a */ x86emuOp_genop_byte_R_RM, -/* 0x1b */ x86emuOp_genop_word_R_RM, -/* 0x1c */ x86emuOp_genop_byte_AL_IMM, -/* 0x1d */ x86emuOp_genop_word_AX_IMM, -/* 0x1e */ x86emuOp_push_DS, -/* 0x1f */ x86emuOp_pop_DS, - -/* 0x20 */ x86emuOp_genop_byte_RM_R, -/* 0x21 */ x86emuOp_genop_word_RM_R, -/* 0x22 */ x86emuOp_genop_byte_R_RM, -/* 0x23 */ x86emuOp_genop_word_R_RM, -/* 0x24 */ x86emuOp_genop_byte_AL_IMM, -/* 0x25 */ x86emuOp_genop_word_AX_IMM, -/* 0x26 */ x86emuOp_segovr_ES, -/* 0x27 */ x86emuOp_daa, - -/* 0x28 */ x86emuOp_genop_byte_RM_R, -/* 0x29 */ x86emuOp_genop_word_RM_R, -/* 0x2a */ x86emuOp_genop_byte_R_RM, -/* 0x2b */ x86emuOp_genop_word_R_RM, -/* 0x2c */ x86emuOp_genop_byte_AL_IMM, -/* 0x2d */ x86emuOp_genop_word_AX_IMM, -/* 0x2e */ x86emuOp_segovr_CS, -/* 0x2f */ x86emuOp_das, - -/* 0x30 */ x86emuOp_genop_byte_RM_R, -/* 0x31 */ x86emuOp_genop_word_RM_R, -/* 0x32 */ x86emuOp_genop_byte_R_RM, -/* 0x33 */ x86emuOp_genop_word_R_RM, -/* 0x34 */ x86emuOp_genop_byte_AL_IMM, -/* 0x35 */ x86emuOp_genop_word_AX_IMM, -/* 0x36 */ x86emuOp_segovr_SS, -/* 0x37 */ x86emuOp_aaa, - -/* 0x38 */ x86emuOp_genop_byte_RM_R, -/* 0x39 */ x86emuOp_genop_word_RM_R, -/* 0x3a */ x86emuOp_genop_byte_R_RM, -/* 0x3b */ x86emuOp_genop_word_R_RM, -/* 0x3c */ x86emuOp_genop_byte_AL_IMM, -/* 0x3d */ x86emuOp_genop_word_AX_IMM, -/* 0x3e */ x86emuOp_segovr_DS, -/* 0x3f */ x86emuOp_aas, - -/* 0x40 */ x86emuOp_inc_register, -/* 0x41 */ x86emuOp_inc_register, -/* 0x42 */ x86emuOp_inc_register, -/* 0x43 */ x86emuOp_inc_register, -/* 0x44 */ x86emuOp_inc_register, -/* 0x45 */ x86emuOp_inc_register, -/* 0x46 */ x86emuOp_inc_register, -/* 0x47 */ x86emuOp_inc_register, - -/* 0x48 */ x86emuOp_dec_register, -/* 0x49 */ x86emuOp_dec_register, -/* 0x4a */ x86emuOp_dec_register, -/* 0x4b */ x86emuOp_dec_register, -/* 0x4c */ x86emuOp_dec_register, -/* 0x4d */ x86emuOp_dec_register, -/* 0x4e */ x86emuOp_dec_register, -/* 0x4f */ x86emuOp_dec_register, - -/* 0x50 */ x86emuOp_push_register, -/* 0x51 */ x86emuOp_push_register, -/* 0x52 */ x86emuOp_push_register, -/* 0x53 */ x86emuOp_push_register, -/* 0x54 */ x86emuOp_push_register, -/* 0x55 */ x86emuOp_push_register, -/* 0x56 */ x86emuOp_push_register, -/* 0x57 */ x86emuOp_push_register, - -/* 0x58 */ x86emuOp_pop_register, -/* 0x59 */ x86emuOp_pop_register, -/* 0x5a */ x86emuOp_pop_register, -/* 0x5b */ x86emuOp_pop_register, -/* 0x5c */ x86emuOp_pop_register, -/* 0x5d */ x86emuOp_pop_register, -/* 0x5e */ x86emuOp_pop_register, -/* 0x5f */ x86emuOp_pop_register, - -/* 0x60 */ x86emuOp_push_all, -/* 0x61 */ x86emuOp_pop_all, -/* 0x62 */ x86emuOp_illegal_op, /* bound */ -/* 0x63 */ x86emuOp_illegal_op, /* arpl */ -/* 0x64 */ x86emuOp_segovr_FS, -/* 0x65 */ x86emuOp_segovr_GS, -/* 0x66 */ x86emuOp_prefix_data, -/* 0x67 */ x86emuOp_prefix_addr, - -/* 0x68 */ x86emuOp_push_word_IMM, -/* 0x69 */ x86emuOp_imul_word_IMM, -/* 0x6a */ x86emuOp_push_byte_IMM, -/* 0x6b */ x86emuOp_imul_byte_IMM, -/* 0x6c */ x86emuOp_ins_byte, -/* 0x6d */ x86emuOp_ins_word, -/* 0x6e */ x86emuOp_outs_byte, -/* 0x6f */ x86emuOp_outs_word, - -/* 0x70 */ x86emuOp_jump_near_cond, -/* 0x71 */ x86emuOp_jump_near_cond, -/* 0x72 */ x86emuOp_jump_near_cond, -/* 0x73 */ x86emuOp_jump_near_cond, -/* 0x74 */ x86emuOp_jump_near_cond, -/* 0x75 */ x86emuOp_jump_near_cond, -/* 0x76 */ x86emuOp_jump_near_cond, -/* 0x77 */ x86emuOp_jump_near_cond, - -/* 0x78 */ x86emuOp_jump_near_cond, -/* 0x79 */ x86emuOp_jump_near_cond, -/* 0x7a */ x86emuOp_jump_near_cond, -/* 0x7b */ x86emuOp_jump_near_cond, -/* 0x7c */ x86emuOp_jump_near_cond, -/* 0x7d */ x86emuOp_jump_near_cond, -/* 0x7e */ x86emuOp_jump_near_cond, -/* 0x7f */ x86emuOp_jump_near_cond, - -/* 0x80 */ x86emuOp_opc80_byte_RM_IMM, -/* 0x81 */ x86emuOp_opc81_word_RM_IMM, -/* 0x82 */ x86emuOp_opc82_byte_RM_IMM, -/* 0x83 */ x86emuOp_opc83_word_RM_IMM, -/* 0x84 */ x86emuOp_test_byte_RM_R, -/* 0x85 */ x86emuOp_test_word_RM_R, -/* 0x86 */ x86emuOp_xchg_byte_RM_R, -/* 0x87 */ x86emuOp_xchg_word_RM_R, - -/* 0x88 */ x86emuOp_mov_byte_RM_R, -/* 0x89 */ x86emuOp_mov_word_RM_R, -/* 0x8a */ x86emuOp_mov_byte_R_RM, -/* 0x8b */ x86emuOp_mov_word_R_RM, -/* 0x8c */ x86emuOp_mov_word_RM_SR, -/* 0x8d */ x86emuOp_lea_word_R_M, -/* 0x8e */ x86emuOp_mov_word_SR_RM, -/* 0x8f */ x86emuOp_pop_RM, - -/* 0x90 */ x86emuOp_nop, -/* 0x91 */ x86emuOp_xchg_word_AX_register, -/* 0x92 */ x86emuOp_xchg_word_AX_register, -/* 0x93 */ x86emuOp_xchg_word_AX_register, -/* 0x94 */ x86emuOp_xchg_word_AX_register, -/* 0x95 */ x86emuOp_xchg_word_AX_register, -/* 0x96 */ x86emuOp_xchg_word_AX_register, -/* 0x97 */ x86emuOp_xchg_word_AX_register, - -/* 0x98 */ x86emuOp_cbw, -/* 0x99 */ x86emuOp_cwd, -/* 0x9a */ x86emuOp_call_far_IMM, -/* 0x9b */ x86emuOp_wait, -/* 0x9c */ x86emuOp_pushf_word, -/* 0x9d */ x86emuOp_popf_word, -/* 0x9e */ x86emuOp_sahf, -/* 0x9f */ x86emuOp_lahf, - -/* 0xa0 */ x86emuOp_mov_AL_M_IMM, -/* 0xa1 */ x86emuOp_mov_AX_M_IMM, -/* 0xa2 */ x86emuOp_mov_M_AL_IMM, -/* 0xa3 */ x86emuOp_mov_M_AX_IMM, -/* 0xa4 */ x86emuOp_movs_byte, -/* 0xa5 */ x86emuOp_movs_word, -/* 0xa6 */ x86emuOp_cmps_byte, -/* 0xa7 */ x86emuOp_cmps_word, -/* 0xa8 */ x86emuOp_test_AL_IMM, -/* 0xa9 */ x86emuOp_test_AX_IMM, -/* 0xaa */ x86emuOp_stos_byte, -/* 0xab */ x86emuOp_stos_word, -/* 0xac */ x86emuOp_lods_byte, -/* 0xad */ x86emuOp_lods_word, -/* 0xac */ x86emuOp_scas_byte, -/* 0xad */ x86emuOp_scas_word, - -/* 0xb0 */ x86emuOp_mov_byte_register_IMM, -/* 0xb1 */ x86emuOp_mov_byte_register_IMM, -/* 0xb2 */ x86emuOp_mov_byte_register_IMM, -/* 0xb3 */ x86emuOp_mov_byte_register_IMM, -/* 0xb4 */ x86emuOp_mov_byte_register_IMM, -/* 0xb5 */ x86emuOp_mov_byte_register_IMM, -/* 0xb6 */ x86emuOp_mov_byte_register_IMM, -/* 0xb7 */ x86emuOp_mov_byte_register_IMM, - -/* 0xb8 */ x86emuOp_mov_word_register_IMM, -/* 0xb9 */ x86emuOp_mov_word_register_IMM, -/* 0xba */ x86emuOp_mov_word_register_IMM, -/* 0xbb */ x86emuOp_mov_word_register_IMM, -/* 0xbc */ x86emuOp_mov_word_register_IMM, -/* 0xbd */ x86emuOp_mov_word_register_IMM, -/* 0xbe */ x86emuOp_mov_word_register_IMM, -/* 0xbf */ x86emuOp_mov_word_register_IMM, - -/* 0xc0 */ x86emuOp_opcC0_byte_RM_MEM, -/* 0xc1 */ x86emuOp_opcC1_word_RM_MEM, -/* 0xc2 */ x86emuOp_ret_near_IMM, -/* 0xc3 */ x86emuOp_ret_near, -/* 0xc4 */ x86emuOp_les_R_IMM, -/* 0xc5 */ x86emuOp_lds_R_IMM, -/* 0xc6 */ x86emuOp_mov_byte_RM_IMM, -/* 0xc7 */ x86emuOp_mov_word_RM_IMM, -/* 0xc8 */ x86emuOp_enter, -/* 0xc9 */ x86emuOp_leave, -/* 0xca */ x86emuOp_ret_far_IMM, -/* 0xcb */ x86emuOp_ret_far, -/* 0xcc */ x86emuOp_int3, -/* 0xcd */ x86emuOp_int_IMM, -/* 0xce */ x86emuOp_into, -/* 0xcf */ x86emuOp_iret, - -/* 0xd0 */ x86emuOp_opcD0_byte_RM_1, -/* 0xd1 */ x86emuOp_opcD1_word_RM_1, -/* 0xd2 */ x86emuOp_opcD2_byte_RM_CL, -/* 0xd3 */ x86emuOp_opcD3_word_RM_CL, -/* 0xd4 */ x86emuOp_aam, -/* 0xd5 */ x86emuOp_aad, -/* 0xd6 */ x86emuOp_illegal_op, /* Undocumented SETALC instruction */ -/* 0xd7 */ x86emuOp_xlat, -/* 0xd8 */ NULL, /*x86emuOp_esc_coprocess_d8,*/ -/* 0xd9 */ NULL, /*x86emuOp_esc_coprocess_d9,*/ -/* 0xda */ NULL, /*x86emuOp_esc_coprocess_da,*/ -/* 0xdb */ NULL, /*x86emuOp_esc_coprocess_db,*/ -/* 0xdc */ NULL, /*x86emuOp_esc_coprocess_dc,*/ -/* 0xdd */ NULL, /*x86emuOp_esc_coprocess_dd,*/ -/* 0xde */ NULL, /*x86emuOp_esc_coprocess_de,*/ -/* 0xdf */ NULL, /*x86emuOp_esc_coprocess_df,*/ - -/* 0xe0 */ x86emuOp_loopne, -/* 0xe1 */ x86emuOp_loope, -/* 0xe2 */ x86emuOp_loop, -/* 0xe3 */ x86emuOp_jcxz, -/* 0xe4 */ x86emuOp_in_byte_AL_IMM, -/* 0xe5 */ x86emuOp_in_word_AX_IMM, -/* 0xe6 */ x86emuOp_out_byte_IMM_AL, -/* 0xe7 */ x86emuOp_out_word_IMM_AX, - -/* 0xe8 */ x86emuOp_call_near_IMM, -/* 0xe9 */ x86emuOp_jump_near_IMM, -/* 0xea */ x86emuOp_jump_far_IMM, -/* 0xeb */ x86emuOp_jump_byte_IMM, -/* 0xec */ x86emuOp_in_byte_AL_DX, -/* 0xed */ x86emuOp_in_word_AX_DX, -/* 0xee */ x86emuOp_out_byte_DX_AL, -/* 0xef */ x86emuOp_out_word_DX_AX, - -/* 0xf0 */ x86emuOp_lock, -/* 0xf1 */ x86emuOp_illegal_op, -/* 0xf2 */ x86emuOp_repne, -/* 0xf3 */ x86emuOp_repe, -/* 0xf4 */ x86emuOp_halt, -/* 0xf5 */ x86emuOp_cmc, -/* 0xf6 */ x86emuOp_opcF6_byte_RM, -/* 0xf7 */ x86emuOp_opcF7_word_RM, - -/* 0xf8 */ x86emuOp_clc, -/* 0xf9 */ x86emuOp_stc, -/* 0xfa */ x86emuOp_cli, -/* 0xfb */ x86emuOp_sti, -/* 0xfc */ x86emuOp_cld, -/* 0xfd */ x86emuOp_std, -/* 0xfe */ x86emuOp_opcFE_byte_RM, -/* 0xff */ x86emuOp_opcFF_word_RM, -}; diff --git a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/ops2.c b/qemu/roms/u-boot/drivers/bios_emulator/x86emu/ops2.c deleted file mode 100644 index 59dbb422d..000000000 --- a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/ops2.c +++ /dev/null @@ -1,1769 +0,0 @@ -/**************************************************************************** -* -* Realmode X86 Emulator Library -* -* Copyright (C) 2007 Freescale Semiconductor, Inc. -* Jason Jin <Jason.jin@freescale.com> -* -* Copyright (C) 1991-2004 SciTech Software, Inc. -* Copyright (C) David Mosberger-Tang -* Copyright (C) 1999 Egbert Eich -* -* ======================================================================== -* -* Permission to use, copy, modify, distribute, and sell this software and -* its documentation for any purpose is hereby granted without fee, -* provided that the above copyright notice appear in all copies and that -* both that copyright notice and this permission notice appear in -* supporting documentation, and that the name of the authors not be used -* in advertising or publicity pertaining to distribution of the software -* without specific, written prior permission. The authors makes no -* representations about the suitability of this software for any purpose. -* It is provided "as is" without express or implied warranty. -* -* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, -* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO -* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR -* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF -* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR -* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR -* PERFORMANCE OF THIS SOFTWARE. -* -* ======================================================================== -* -* Language: ANSI C -* Environment: Any -* Developer: Kendall Bennett -* -* Description: This file includes subroutines to implement the decoding -* and emulation of all the x86 extended two-byte processor -* instructions. -* -****************************************************************************/ - -#include <common.h> -#include <linux/compiler.h> -#include "x86emu/x86emui.h" - -/*----------------------------- Implementation ----------------------------*/ - -/**************************************************************************** -PARAMETERS: -op1 - Instruction op code - -REMARKS: -Handles illegal opcodes. -****************************************************************************/ -void x86emuOp2_illegal_op( - u8 op2) -{ - START_OF_INSTR(); - DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n"); - TRACE_REGS(); - printk("%04x:%04x: %02X ILLEGAL EXTENDED X86 OPCODE!\n", - M.x86.R_CS, M.x86.R_IP-2,op2); - HALT_SYS(); - END_OF_INSTR(); -} - -#define xorl(a,b) ((a) && !(b)) || (!(a) && (b)) - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0x80-0x8F -****************************************************************************/ -int x86emu_check_jump_condition(u8 op) -{ - switch (op) { - case 0x0: - DECODE_PRINTF("JO\t"); - return ACCESS_FLAG(F_OF); - case 0x1: - DECODE_PRINTF("JNO\t"); - return !ACCESS_FLAG(F_OF); - break; - case 0x2: - DECODE_PRINTF("JB\t"); - return ACCESS_FLAG(F_CF); - break; - case 0x3: - DECODE_PRINTF("JNB\t"); - return !ACCESS_FLAG(F_CF); - break; - case 0x4: - DECODE_PRINTF("JZ\t"); - return ACCESS_FLAG(F_ZF); - break; - case 0x5: - DECODE_PRINTF("JNZ\t"); - return !ACCESS_FLAG(F_ZF); - break; - case 0x6: - DECODE_PRINTF("JBE\t"); - return ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF); - break; - case 0x7: - DECODE_PRINTF("JNBE\t"); - return !(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF)); - break; - case 0x8: - DECODE_PRINTF("JS\t"); - return ACCESS_FLAG(F_SF); - break; - case 0x9: - DECODE_PRINTF("JNS\t"); - return !ACCESS_FLAG(F_SF); - break; - case 0xa: - DECODE_PRINTF("JP\t"); - return ACCESS_FLAG(F_PF); - break; - case 0xb: - DECODE_PRINTF("JNP\t"); - return !ACCESS_FLAG(F_PF); - break; - case 0xc: - DECODE_PRINTF("JL\t"); - return xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)); - break; - case 0xd: - DECODE_PRINTF("JNL\t"); - return !xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)); - break; - case 0xe: - DECODE_PRINTF("JLE\t"); - return (xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) || - ACCESS_FLAG(F_ZF)); - break; - default: - DECODE_PRINTF("JNLE\t"); - return !(xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) || - ACCESS_FLAG(F_ZF)); - } -} - -void x86emuOp2_long_jump(u8 op2) -{ - s32 target; - int cond; - - /* conditional jump to word offset. */ - START_OF_INSTR(); - cond = x86emu_check_jump_condition(op2 & 0xF); - target = (s16) fetch_word_imm(); - target += (s16) M.x86.R_IP; - DECODE_PRINTF2("%04x\n", target); - TRACE_AND_STEP(); - if (cond) - M.x86.R_IP = (u16)target; - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0x90-0x9F -****************************************************************************/ -void x86emuOp2_set_byte(u8 op2) -{ - int mod, rl, rh; - uint destoffset; - u8 *destreg; - __maybe_unused char *name = 0; - int cond = 0; - - START_OF_INSTR(); - switch (op2) { - case 0x90: - name = "SETO\t"; - cond = ACCESS_FLAG(F_OF); - break; - case 0x91: - name = "SETNO\t"; - cond = !ACCESS_FLAG(F_OF); - break; - case 0x92: - name = "SETB\t"; - cond = ACCESS_FLAG(F_CF); - break; - case 0x93: - name = "SETNB\t"; - cond = !ACCESS_FLAG(F_CF); - break; - case 0x94: - name = "SETZ\t"; - cond = ACCESS_FLAG(F_ZF); - break; - case 0x95: - name = "SETNZ\t"; - cond = !ACCESS_FLAG(F_ZF); - break; - case 0x96: - name = "SETBE\t"; - cond = ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF); - break; - case 0x97: - name = "SETNBE\t"; - cond = !(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF)); - break; - case 0x98: - name = "SETS\t"; - cond = ACCESS_FLAG(F_SF); - break; - case 0x99: - name = "SETNS\t"; - cond = !ACCESS_FLAG(F_SF); - break; - case 0x9a: - name = "SETP\t"; - cond = ACCESS_FLAG(F_PF); - break; - case 0x9b: - name = "SETNP\t"; - cond = !ACCESS_FLAG(F_PF); - break; - case 0x9c: - name = "SETL\t"; - cond = xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)); - break; - case 0x9d: - name = "SETNL\t"; - cond = !xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)); - break; - case 0x9e: - name = "SETLE\t"; - cond = (xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) || - ACCESS_FLAG(F_ZF)); - break; - case 0x9f: - name = "SETNLE\t"; - cond = !(xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) || - ACCESS_FLAG(F_ZF)); - break; - } - DECODE_PRINTF(name); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - TRACE_AND_STEP(); - store_data_byte(destoffset, cond ? 0x01 : 0x00); - } else { /* register to register */ - destreg = DECODE_RM_BYTE_REGISTER(rl); - TRACE_AND_STEP(); - *destreg = cond ? 0x01 : 0x00; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xa0 -****************************************************************************/ -void x86emuOp2_push_FS(u8 X86EMU_UNUSED(op2)) -{ - START_OF_INSTR(); - DECODE_PRINTF("PUSH\tFS\n"); - TRACE_AND_STEP(); - push_word(M.x86.R_FS); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xa1 -****************************************************************************/ -void x86emuOp2_pop_FS(u8 X86EMU_UNUSED(op2)) -{ - START_OF_INSTR(); - DECODE_PRINTF("POP\tFS\n"); - TRACE_AND_STEP(); - M.x86.R_FS = pop_word(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xa3 -****************************************************************************/ -void x86emuOp2_bt_R(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - int bit,disp; - - START_OF_INSTR(); - DECODE_PRINTF("BT\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 srcval; - u32 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0x1F; - disp = (s16)*shiftreg >> 5; - srcval = fetch_data_long(srcoffset+disp); - CONDITIONAL_SET_FLAG(srcval & (0x1 << bit),F_CF); - } else { - u16 srcval; - u16 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0xF; - disp = (s16)*shiftreg >> 4; - srcval = fetch_data_word(srcoffset+disp); - CONDITIONAL_SET_FLAG(srcval & (0x1 << bit),F_CF); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg,*shiftreg; - - srcreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0x1F; - CONDITIONAL_SET_FLAG(*srcreg & (0x1 << bit),F_CF); - } else { - u16 *srcreg,*shiftreg; - - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0xF; - CONDITIONAL_SET_FLAG(*srcreg & (0x1 << bit),F_CF); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xa4 -****************************************************************************/ -void x86emuOp2_shld_IMM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint destoffset; - u8 shift; - - START_OF_INSTR(); - DECODE_PRINTF("SHLD\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - u32 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - shift = fetch_byte_imm(); - DECODE_PRINTF2("%d\n", shift); - TRACE_AND_STEP(); - destval = fetch_data_long(destoffset); - destval = shld_long(destval,*shiftreg,shift); - store_data_long(destoffset, destval); - } else { - u16 destval; - u16 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - shift = fetch_byte_imm(); - DECODE_PRINTF2("%d\n", shift); - TRACE_AND_STEP(); - destval = fetch_data_word(destoffset); - destval = shld_word(destval,*shiftreg,shift); - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*shiftreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - shift = fetch_byte_imm(); - DECODE_PRINTF2("%d\n", shift); - TRACE_AND_STEP(); - *destreg = shld_long(*destreg,*shiftreg,shift); - } else { - u16 *destreg,*shiftreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - shift = fetch_byte_imm(); - DECODE_PRINTF2("%d\n", shift); - TRACE_AND_STEP(); - *destreg = shld_word(*destreg,*shiftreg,shift); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xa5 -****************************************************************************/ -void x86emuOp2_shld_CL(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint destoffset; - - START_OF_INSTR(); - DECODE_PRINTF("SHLD\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - u32 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - destval = fetch_data_long(destoffset); - destval = shld_long(destval,*shiftreg,M.x86.R_CL); - store_data_long(destoffset, destval); - } else { - u16 destval; - u16 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - destval = fetch_data_word(destoffset); - destval = shld_word(destval,*shiftreg,M.x86.R_CL); - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*shiftreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - *destreg = shld_long(*destreg,*shiftreg,M.x86.R_CL); - } else { - u16 *destreg,*shiftreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - *destreg = shld_word(*destreg,*shiftreg,M.x86.R_CL); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xa8 -****************************************************************************/ -void x86emuOp2_push_GS(u8 X86EMU_UNUSED(op2)) -{ - START_OF_INSTR(); - DECODE_PRINTF("PUSH\tGS\n"); - TRACE_AND_STEP(); - push_word(M.x86.R_GS); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xa9 -****************************************************************************/ -void x86emuOp2_pop_GS(u8 X86EMU_UNUSED(op2)) -{ - START_OF_INSTR(); - DECODE_PRINTF("POP\tGS\n"); - TRACE_AND_STEP(); - M.x86.R_GS = pop_word(); - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xaa -****************************************************************************/ -void x86emuOp2_bts_R(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - int bit,disp; - - START_OF_INSTR(); - DECODE_PRINTF("BTS\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 srcval,mask; - u32 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0x1F; - disp = (s16)*shiftreg >> 5; - srcval = fetch_data_long(srcoffset+disp); - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(srcval & mask,F_CF); - store_data_long(srcoffset+disp, srcval | mask); - } else { - u16 srcval,mask; - u16 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0xF; - disp = (s16)*shiftreg >> 4; - srcval = fetch_data_word(srcoffset+disp); - mask = (u16)(0x1 << bit); - CONDITIONAL_SET_FLAG(srcval & mask,F_CF); - store_data_word(srcoffset+disp, srcval | mask); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg,*shiftreg; - u32 mask; - - srcreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0x1F; - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF); - *srcreg |= mask; - } else { - u16 *srcreg,*shiftreg; - u16 mask; - - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0xF; - mask = (u16)(0x1 << bit); - CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF); - *srcreg |= mask; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xac -****************************************************************************/ -void x86emuOp2_shrd_IMM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint destoffset; - u8 shift; - - START_OF_INSTR(); - DECODE_PRINTF("SHLD\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - u32 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - shift = fetch_byte_imm(); - DECODE_PRINTF2("%d\n", shift); - TRACE_AND_STEP(); - destval = fetch_data_long(destoffset); - destval = shrd_long(destval,*shiftreg,shift); - store_data_long(destoffset, destval); - } else { - u16 destval; - u16 *shiftreg; - - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - shift = fetch_byte_imm(); - DECODE_PRINTF2("%d\n", shift); - TRACE_AND_STEP(); - destval = fetch_data_word(destoffset); - destval = shrd_word(destval,*shiftreg,shift); - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*shiftreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - shift = fetch_byte_imm(); - DECODE_PRINTF2("%d\n", shift); - TRACE_AND_STEP(); - *destreg = shrd_long(*destreg,*shiftreg,shift); - } else { - u16 *destreg,*shiftreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - shift = fetch_byte_imm(); - DECODE_PRINTF2("%d\n", shift); - TRACE_AND_STEP(); - *destreg = shrd_word(*destreg,*shiftreg,shift); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xad -****************************************************************************/ -void x86emuOp2_shrd_CL(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint destoffset; - - START_OF_INSTR(); - DECODE_PRINTF("SHLD\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 destval; - u32 *shiftreg; - - shiftreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - destval = fetch_data_long(destoffset); - destval = shrd_long(destval,*shiftreg,M.x86.R_CL); - store_data_long(destoffset, destval); - } else { - u16 destval; - u16 *shiftreg; - - shiftreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - destval = fetch_data_word(destoffset); - destval = shrd_word(destval,*shiftreg,M.x86.R_CL); - store_data_word(destoffset, destval); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*shiftreg; - - destreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - *destreg = shrd_long(*destreg,*shiftreg,M.x86.R_CL); - } else { - u16 *destreg,*shiftreg; - - destreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(",CL\n"); - TRACE_AND_STEP(); - *destreg = shrd_word(*destreg,*shiftreg,M.x86.R_CL); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xaf -****************************************************************************/ -void x86emuOp2_imul_R_RM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("IMUL\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 srcval; - u32 res_lo,res_hi; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = fetch_data_long(srcoffset); - TRACE_AND_STEP(); - imul_long_direct(&res_lo,&res_hi,(s32)*destreg,(s32)srcval); - if (res_hi != 0) { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } else { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } - *destreg = (u32)res_lo; - } else { - u16 *destreg; - u16 srcval; - u32 res; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = fetch_data_word(srcoffset); - TRACE_AND_STEP(); - res = (s16)*destreg * (s16)srcval; - if (res > 0xFFFF) { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } else { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } - *destreg = (u16)res; - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg,*srcreg; - u32 res_lo,res_hi; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_LONG_REGISTER(rl); - TRACE_AND_STEP(); - imul_long_direct(&res_lo,&res_hi,(s32)*destreg,(s32)*srcreg); - if (res_hi != 0) { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } else { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } - *destreg = (u32)res_lo; - } else { - u16 *destreg,*srcreg; - u32 res; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rl); - res = (s16)*destreg * (s16)*srcreg; - if (res > 0xFFFF) { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } else { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } - *destreg = (u16)res; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xb2 -****************************************************************************/ -void x86emuOp2_lss_R_IMM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rh, rl; - u16 *dstreg; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("LSS\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - dstreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *dstreg = fetch_data_word(srcoffset); - M.x86.R_SS = fetch_data_word(srcoffset + 2); - } else { /* register to register */ - /* UNDEFINED! */ - TRACE_AND_STEP(); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xb3 -****************************************************************************/ -void x86emuOp2_btr_R(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - int bit,disp; - - START_OF_INSTR(); - DECODE_PRINTF("BTR\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 srcval,mask; - u32 *shiftreg; - - shiftreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0x1F; - disp = (s16)*shiftreg >> 5; - srcval = fetch_data_long(srcoffset+disp); - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(srcval & mask,F_CF); - store_data_long(srcoffset+disp, srcval & ~mask); - } else { - u16 srcval,mask; - u16 *shiftreg; - - shiftreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0xF; - disp = (s16)*shiftreg >> 4; - srcval = fetch_data_word(srcoffset+disp); - mask = (u16)(0x1 << bit); - CONDITIONAL_SET_FLAG(srcval & mask,F_CF); - store_data_word(srcoffset+disp, (u16)(srcval & ~mask)); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg,*shiftreg; - u32 mask; - - srcreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0x1F; - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF); - *srcreg &= ~mask; - } else { - u16 *srcreg,*shiftreg; - u16 mask; - - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0xF; - mask = (u16)(0x1 << bit); - CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF); - *srcreg &= ~mask; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xb4 -****************************************************************************/ -void x86emuOp2_lfs_R_IMM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rh, rl; - u16 *dstreg; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("LFS\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - dstreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *dstreg = fetch_data_word(srcoffset); - M.x86.R_FS = fetch_data_word(srcoffset + 2); - } else { /* register to register */ - /* UNDEFINED! */ - TRACE_AND_STEP(); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xb5 -****************************************************************************/ -void x86emuOp2_lgs_R_IMM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rh, rl; - u16 *dstreg; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("LGS\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - dstreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *dstreg = fetch_data_word(srcoffset); - M.x86.R_GS = fetch_data_word(srcoffset + 2); - } else { /* register to register */ - /* UNDEFINED! */ - TRACE_AND_STEP(); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xb6 -****************************************************************************/ -void x86emuOp2_movzx_byte_R_RM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("MOVZX\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 srcval; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = fetch_data_byte(srcoffset); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } else { - u16 *destreg; - u16 srcval; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = fetch_data_byte(srcoffset); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u8 *srcreg; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } else { - u16 *destreg; - u8 *srcreg; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xb7 -****************************************************************************/ -void x86emuOp2_movzx_word_R_RM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - u32 *destreg; - u32 srcval; - u16 *srcreg; - - START_OF_INSTR(); - DECODE_PRINTF("MOVZX\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = fetch_data_word(srcoffset); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } else { /* register to register */ - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = *srcreg; - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xba -****************************************************************************/ -void x86emuOp2_btX_I(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - u8 shift; - int bit; - - START_OF_INSTR(); - FETCH_DECODE_MODRM(mod, rh, rl); - switch (rh) { - case 4: - DECODE_PRINTF("BT\t"); - break; - case 5: - DECODE_PRINTF("BTS\t"); - break; - case 6: - DECODE_PRINTF("BTR\t"); - break; - case 7: - DECODE_PRINTF("BTC\t"); - break; - default: - DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n"); - TRACE_REGS(); - printk("%04x:%04x: %02X%02X ILLEGAL EXTENDED X86 OPCODE EXTENSION!\n", - M.x86.R_CS, M.x86.R_IP-3,op2, (mod<<6)|(rh<<3)|rl); - HALT_SYS(); - } - if (mod < 3) { - - srcoffset = decode_rmXX_address(mod, rl); - shift = fetch_byte_imm(); - DECODE_PRINTF2(",%d\n", shift); - TRACE_AND_STEP(); - - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 srcval, mask; - - bit = shift & 0x1F; - srcval = fetch_data_long(srcoffset); - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(srcval & mask,F_CF); - switch (rh) { - case 5: - store_data_long(srcoffset, srcval | mask); - break; - case 6: - store_data_long(srcoffset, srcval & ~mask); - break; - case 7: - store_data_long(srcoffset, srcval ^ mask); - break; - default: - break; - } - } else { - u16 srcval, mask; - - bit = shift & 0xF; - srcval = fetch_data_word(srcoffset); - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(srcval & mask,F_CF); - switch (rh) { - case 5: - store_data_word(srcoffset, srcval | mask); - break; - case 6: - store_data_word(srcoffset, srcval & ~mask); - break; - case 7: - store_data_word(srcoffset, srcval ^ mask); - break; - default: - break; - } - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg; - u32 mask; - - srcreg = DECODE_RM_LONG_REGISTER(rl); - shift = fetch_byte_imm(); - DECODE_PRINTF2(",%d\n", shift); - TRACE_AND_STEP(); - bit = shift & 0x1F; - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF); - switch (rh) { - case 5: - *srcreg |= mask; - break; - case 6: - *srcreg &= ~mask; - break; - case 7: - *srcreg ^= mask; - break; - default: - break; - } - } else { - u16 *srcreg; - u16 mask; - - srcreg = DECODE_RM_WORD_REGISTER(rl); - shift = fetch_byte_imm(); - DECODE_PRINTF2(",%d\n", shift); - TRACE_AND_STEP(); - bit = shift & 0xF; - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF); - switch (rh) { - case 5: - *srcreg |= mask; - break; - case 6: - *srcreg &= ~mask; - break; - case 7: - *srcreg ^= mask; - break; - default: - break; - } - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xbb -****************************************************************************/ -void x86emuOp2_btc_R(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - int bit,disp; - - START_OF_INSTR(); - DECODE_PRINTF("BTC\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 srcval,mask; - u32 *shiftreg; - - shiftreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0x1F; - disp = (s16)*shiftreg >> 5; - srcval = fetch_data_long(srcoffset+disp); - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(srcval & mask,F_CF); - store_data_long(srcoffset+disp, srcval ^ mask); - } else { - u16 srcval,mask; - u16 *shiftreg; - - shiftreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0xF; - disp = (s16)*shiftreg >> 4; - srcval = fetch_data_word(srcoffset+disp); - mask = (u16)(0x1 << bit); - CONDITIONAL_SET_FLAG(srcval & mask,F_CF); - store_data_word(srcoffset+disp, (u16)(srcval ^ mask)); - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg,*shiftreg; - u32 mask; - - srcreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0x1F; - mask = (0x1 << bit); - CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF); - *srcreg ^= mask; - } else { - u16 *srcreg,*shiftreg; - u16 mask; - - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - shiftreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - bit = *shiftreg & 0xF; - mask = (u16)(0x1 << bit); - CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF); - *srcreg ^= mask; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xbc -****************************************************************************/ -void x86emuOp2_bsf(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("BSF\n"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 srcval, *dstreg; - - dstreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - srcval = fetch_data_long(srcoffset); - CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); - for(*dstreg = 0; *dstreg < 32; (*dstreg)++) - if ((srcval >> *dstreg) & 1) break; - } else { - u16 srcval, *dstreg; - - dstreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - srcval = fetch_data_word(srcoffset); - CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); - for(*dstreg = 0; *dstreg < 16; (*dstreg)++) - if ((srcval >> *dstreg) & 1) break; - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg, *dstreg; - - srcreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - dstreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF); - for(*dstreg = 0; *dstreg < 32; (*dstreg)++) - if ((*srcreg >> *dstreg) & 1) break; - } else { - u16 *srcreg, *dstreg; - - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - dstreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF); - for(*dstreg = 0; *dstreg < 16; (*dstreg)++) - if ((*srcreg >> *dstreg) & 1) break; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xbd -****************************************************************************/ -void x86emuOp2_bsr(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("BSF\n"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - srcoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF(","); - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 srcval, *dstreg; - - dstreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - srcval = fetch_data_long(srcoffset); - CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); - for(*dstreg = 31; *dstreg > 0; (*dstreg)--) - if ((srcval >> *dstreg) & 1) break; - } else { - u16 srcval, *dstreg; - - dstreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - srcval = fetch_data_word(srcoffset); - CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); - for(*dstreg = 15; *dstreg > 0; (*dstreg)--) - if ((srcval >> *dstreg) & 1) break; - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *srcreg, *dstreg; - - srcreg = DECODE_RM_LONG_REGISTER(rl); - DECODE_PRINTF(","); - dstreg = DECODE_RM_LONG_REGISTER(rh); - TRACE_AND_STEP(); - CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF); - for(*dstreg = 31; *dstreg > 0; (*dstreg)--) - if ((*srcreg >> *dstreg) & 1) break; - } else { - u16 *srcreg, *dstreg; - - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF(","); - dstreg = DECODE_RM_WORD_REGISTER(rh); - TRACE_AND_STEP(); - CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF); - for(*dstreg = 15; *dstreg > 0; (*dstreg)--) - if ((*srcreg >> *dstreg) & 1) break; - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xbe -****************************************************************************/ -void x86emuOp2_movsx_byte_R_RM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - - START_OF_INSTR(); - DECODE_PRINTF("MOVSX\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u32 srcval; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = (s32)((s8)fetch_data_byte(srcoffset)); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } else { - u16 *destreg; - u16 srcval; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = (s16)((s8)fetch_data_byte(srcoffset)); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } - } else { /* register to register */ - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - u32 *destreg; - u8 *srcreg; - - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = (s32)((s8)*srcreg); - } else { - u16 *destreg; - u8 *srcreg; - - destreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_BYTE_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = (s16)((s8)*srcreg); - } - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/**************************************************************************** -REMARKS: -Handles opcode 0x0f,0xbf -****************************************************************************/ -void x86emuOp2_movsx_word_R_RM(u8 X86EMU_UNUSED(op2)) -{ - int mod, rl, rh; - uint srcoffset; - u32 *destreg; - u32 srcval; - u16 *srcreg; - - START_OF_INSTR(); - DECODE_PRINTF("MOVSX\t"); - FETCH_DECODE_MODRM(mod, rh, rl); - if (mod < 3) { - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcoffset = decode_rmXX_address(mod, rl); - srcval = (s32)((s16)fetch_data_word(srcoffset)); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = srcval; - } else { /* register to register */ - destreg = DECODE_RM_LONG_REGISTER(rh); - DECODE_PRINTF(","); - srcreg = DECODE_RM_WORD_REGISTER(rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *destreg = (s32)((s16)*srcreg); - } - DECODE_CLEAR_SEGOVR(); - END_OF_INSTR(); -} - -/*************************************************************************** - * Double byte operation code table: - **************************************************************************/ -void (*x86emu_optab2[256])(u8) = -{ -/* 0x00 */ x86emuOp2_illegal_op, /* Group F (ring 0 PM) */ -/* 0x01 */ x86emuOp2_illegal_op, /* Group G (ring 0 PM) */ -/* 0x02 */ x86emuOp2_illegal_op, /* lar (ring 0 PM) */ -/* 0x03 */ x86emuOp2_illegal_op, /* lsl (ring 0 PM) */ -/* 0x04 */ x86emuOp2_illegal_op, -/* 0x05 */ x86emuOp2_illegal_op, /* loadall (undocumented) */ -/* 0x06 */ x86emuOp2_illegal_op, /* clts (ring 0 PM) */ -/* 0x07 */ x86emuOp2_illegal_op, /* loadall (undocumented) */ -/* 0x08 */ x86emuOp2_illegal_op, /* invd (ring 0 PM) */ -/* 0x09 */ x86emuOp2_illegal_op, /* wbinvd (ring 0 PM) */ -/* 0x0a */ x86emuOp2_illegal_op, -/* 0x0b */ x86emuOp2_illegal_op, -/* 0x0c */ x86emuOp2_illegal_op, -/* 0x0d */ x86emuOp2_illegal_op, -/* 0x0e */ x86emuOp2_illegal_op, -/* 0x0f */ x86emuOp2_illegal_op, - -/* 0x10 */ x86emuOp2_illegal_op, -/* 0x11 */ x86emuOp2_illegal_op, -/* 0x12 */ x86emuOp2_illegal_op, -/* 0x13 */ x86emuOp2_illegal_op, -/* 0x14 */ x86emuOp2_illegal_op, -/* 0x15 */ x86emuOp2_illegal_op, -/* 0x16 */ x86emuOp2_illegal_op, -/* 0x17 */ x86emuOp2_illegal_op, -/* 0x18 */ x86emuOp2_illegal_op, -/* 0x19 */ x86emuOp2_illegal_op, -/* 0x1a */ x86emuOp2_illegal_op, -/* 0x1b */ x86emuOp2_illegal_op, -/* 0x1c */ x86emuOp2_illegal_op, -/* 0x1d */ x86emuOp2_illegal_op, -/* 0x1e */ x86emuOp2_illegal_op, -/* 0x1f */ x86emuOp2_illegal_op, - -/* 0x20 */ x86emuOp2_illegal_op, /* mov reg32,creg (ring 0 PM) */ -/* 0x21 */ x86emuOp2_illegal_op, /* mov reg32,dreg (ring 0 PM) */ -/* 0x22 */ x86emuOp2_illegal_op, /* mov creg,reg32 (ring 0 PM) */ -/* 0x23 */ x86emuOp2_illegal_op, /* mov dreg,reg32 (ring 0 PM) */ -/* 0x24 */ x86emuOp2_illegal_op, /* mov reg32,treg (ring 0 PM) */ -/* 0x25 */ x86emuOp2_illegal_op, -/* 0x26 */ x86emuOp2_illegal_op, /* mov treg,reg32 (ring 0 PM) */ -/* 0x27 */ x86emuOp2_illegal_op, -/* 0x28 */ x86emuOp2_illegal_op, -/* 0x29 */ x86emuOp2_illegal_op, -/* 0x2a */ x86emuOp2_illegal_op, -/* 0x2b */ x86emuOp2_illegal_op, -/* 0x2c */ x86emuOp2_illegal_op, -/* 0x2d */ x86emuOp2_illegal_op, -/* 0x2e */ x86emuOp2_illegal_op, -/* 0x2f */ x86emuOp2_illegal_op, - -/* 0x30 */ x86emuOp2_illegal_op, -/* 0x31 */ x86emuOp2_illegal_op, -/* 0x32 */ x86emuOp2_illegal_op, -/* 0x33 */ x86emuOp2_illegal_op, -/* 0x34 */ x86emuOp2_illegal_op, -/* 0x35 */ x86emuOp2_illegal_op, -/* 0x36 */ x86emuOp2_illegal_op, -/* 0x37 */ x86emuOp2_illegal_op, -/* 0x38 */ x86emuOp2_illegal_op, -/* 0x39 */ x86emuOp2_illegal_op, -/* 0x3a */ x86emuOp2_illegal_op, -/* 0x3b */ x86emuOp2_illegal_op, -/* 0x3c */ x86emuOp2_illegal_op, -/* 0x3d */ x86emuOp2_illegal_op, -/* 0x3e */ x86emuOp2_illegal_op, -/* 0x3f */ x86emuOp2_illegal_op, - -/* 0x40 */ x86emuOp2_illegal_op, -/* 0x41 */ x86emuOp2_illegal_op, -/* 0x42 */ x86emuOp2_illegal_op, -/* 0x43 */ x86emuOp2_illegal_op, -/* 0x44 */ x86emuOp2_illegal_op, -/* 0x45 */ x86emuOp2_illegal_op, -/* 0x46 */ x86emuOp2_illegal_op, -/* 0x47 */ x86emuOp2_illegal_op, -/* 0x48 */ x86emuOp2_illegal_op, -/* 0x49 */ x86emuOp2_illegal_op, -/* 0x4a */ x86emuOp2_illegal_op, -/* 0x4b */ x86emuOp2_illegal_op, -/* 0x4c */ x86emuOp2_illegal_op, -/* 0x4d */ x86emuOp2_illegal_op, -/* 0x4e */ x86emuOp2_illegal_op, -/* 0x4f */ x86emuOp2_illegal_op, - -/* 0x50 */ x86emuOp2_illegal_op, -/* 0x51 */ x86emuOp2_illegal_op, -/* 0x52 */ x86emuOp2_illegal_op, -/* 0x53 */ x86emuOp2_illegal_op, -/* 0x54 */ x86emuOp2_illegal_op, -/* 0x55 */ x86emuOp2_illegal_op, -/* 0x56 */ x86emuOp2_illegal_op, -/* 0x57 */ x86emuOp2_illegal_op, -/* 0x58 */ x86emuOp2_illegal_op, -/* 0x59 */ x86emuOp2_illegal_op, -/* 0x5a */ x86emuOp2_illegal_op, -/* 0x5b */ x86emuOp2_illegal_op, -/* 0x5c */ x86emuOp2_illegal_op, -/* 0x5d */ x86emuOp2_illegal_op, -/* 0x5e */ x86emuOp2_illegal_op, -/* 0x5f */ x86emuOp2_illegal_op, - -/* 0x60 */ x86emuOp2_illegal_op, -/* 0x61 */ x86emuOp2_illegal_op, -/* 0x62 */ x86emuOp2_illegal_op, -/* 0x63 */ x86emuOp2_illegal_op, -/* 0x64 */ x86emuOp2_illegal_op, -/* 0x65 */ x86emuOp2_illegal_op, -/* 0x66 */ x86emuOp2_illegal_op, -/* 0x67 */ x86emuOp2_illegal_op, -/* 0x68 */ x86emuOp2_illegal_op, -/* 0x69 */ x86emuOp2_illegal_op, -/* 0x6a */ x86emuOp2_illegal_op, -/* 0x6b */ x86emuOp2_illegal_op, -/* 0x6c */ x86emuOp2_illegal_op, -/* 0x6d */ x86emuOp2_illegal_op, -/* 0x6e */ x86emuOp2_illegal_op, -/* 0x6f */ x86emuOp2_illegal_op, - -/* 0x70 */ x86emuOp2_illegal_op, -/* 0x71 */ x86emuOp2_illegal_op, -/* 0x72 */ x86emuOp2_illegal_op, -/* 0x73 */ x86emuOp2_illegal_op, -/* 0x74 */ x86emuOp2_illegal_op, -/* 0x75 */ x86emuOp2_illegal_op, -/* 0x76 */ x86emuOp2_illegal_op, -/* 0x77 */ x86emuOp2_illegal_op, -/* 0x78 */ x86emuOp2_illegal_op, -/* 0x79 */ x86emuOp2_illegal_op, -/* 0x7a */ x86emuOp2_illegal_op, -/* 0x7b */ x86emuOp2_illegal_op, -/* 0x7c */ x86emuOp2_illegal_op, -/* 0x7d */ x86emuOp2_illegal_op, -/* 0x7e */ x86emuOp2_illegal_op, -/* 0x7f */ x86emuOp2_illegal_op, - -/* 0x80 */ x86emuOp2_long_jump, -/* 0x81 */ x86emuOp2_long_jump, -/* 0x82 */ x86emuOp2_long_jump, -/* 0x83 */ x86emuOp2_long_jump, -/* 0x84 */ x86emuOp2_long_jump, -/* 0x85 */ x86emuOp2_long_jump, -/* 0x86 */ x86emuOp2_long_jump, -/* 0x87 */ x86emuOp2_long_jump, -/* 0x88 */ x86emuOp2_long_jump, -/* 0x89 */ x86emuOp2_long_jump, -/* 0x8a */ x86emuOp2_long_jump, -/* 0x8b */ x86emuOp2_long_jump, -/* 0x8c */ x86emuOp2_long_jump, -/* 0x8d */ x86emuOp2_long_jump, -/* 0x8e */ x86emuOp2_long_jump, -/* 0x8f */ x86emuOp2_long_jump, - -/* 0x90 */ x86emuOp2_set_byte, -/* 0x91 */ x86emuOp2_set_byte, -/* 0x92 */ x86emuOp2_set_byte, -/* 0x93 */ x86emuOp2_set_byte, -/* 0x94 */ x86emuOp2_set_byte, -/* 0x95 */ x86emuOp2_set_byte, -/* 0x96 */ x86emuOp2_set_byte, -/* 0x97 */ x86emuOp2_set_byte, -/* 0x98 */ x86emuOp2_set_byte, -/* 0x99 */ x86emuOp2_set_byte, -/* 0x9a */ x86emuOp2_set_byte, -/* 0x9b */ x86emuOp2_set_byte, -/* 0x9c */ x86emuOp2_set_byte, -/* 0x9d */ x86emuOp2_set_byte, -/* 0x9e */ x86emuOp2_set_byte, -/* 0x9f */ x86emuOp2_set_byte, - -/* 0xa0 */ x86emuOp2_push_FS, -/* 0xa1 */ x86emuOp2_pop_FS, -/* 0xa2 */ x86emuOp2_illegal_op, -/* 0xa3 */ x86emuOp2_bt_R, -/* 0xa4 */ x86emuOp2_shld_IMM, -/* 0xa5 */ x86emuOp2_shld_CL, -/* 0xa6 */ x86emuOp2_illegal_op, -/* 0xa7 */ x86emuOp2_illegal_op, -/* 0xa8 */ x86emuOp2_push_GS, -/* 0xa9 */ x86emuOp2_pop_GS, -/* 0xaa */ x86emuOp2_illegal_op, -/* 0xab */ x86emuOp2_bt_R, -/* 0xac */ x86emuOp2_shrd_IMM, -/* 0xad */ x86emuOp2_shrd_CL, -/* 0xae */ x86emuOp2_illegal_op, -/* 0xaf */ x86emuOp2_imul_R_RM, - -/* 0xb0 */ x86emuOp2_illegal_op, /* TODO: cmpxchg */ -/* 0xb1 */ x86emuOp2_illegal_op, /* TODO: cmpxchg */ -/* 0xb2 */ x86emuOp2_lss_R_IMM, -/* 0xb3 */ x86emuOp2_btr_R, -/* 0xb4 */ x86emuOp2_lfs_R_IMM, -/* 0xb5 */ x86emuOp2_lgs_R_IMM, -/* 0xb6 */ x86emuOp2_movzx_byte_R_RM, -/* 0xb7 */ x86emuOp2_movzx_word_R_RM, -/* 0xb8 */ x86emuOp2_illegal_op, -/* 0xb9 */ x86emuOp2_illegal_op, -/* 0xba */ x86emuOp2_btX_I, -/* 0xbb */ x86emuOp2_btc_R, -/* 0xbc */ x86emuOp2_bsf, -/* 0xbd */ x86emuOp2_bsr, -/* 0xbe */ x86emuOp2_movsx_byte_R_RM, -/* 0xbf */ x86emuOp2_movsx_word_R_RM, - -/* 0xc0 */ x86emuOp2_illegal_op, /* TODO: xadd */ -/* 0xc1 */ x86emuOp2_illegal_op, /* TODO: xadd */ -/* 0xc2 */ x86emuOp2_illegal_op, -/* 0xc3 */ x86emuOp2_illegal_op, -/* 0xc4 */ x86emuOp2_illegal_op, -/* 0xc5 */ x86emuOp2_illegal_op, -/* 0xc6 */ x86emuOp2_illegal_op, -/* 0xc7 */ x86emuOp2_illegal_op, -/* 0xc8 */ x86emuOp2_illegal_op, /* TODO: bswap */ -/* 0xc9 */ x86emuOp2_illegal_op, /* TODO: bswap */ -/* 0xca */ x86emuOp2_illegal_op, /* TODO: bswap */ -/* 0xcb */ x86emuOp2_illegal_op, /* TODO: bswap */ -/* 0xcc */ x86emuOp2_illegal_op, /* TODO: bswap */ -/* 0xcd */ x86emuOp2_illegal_op, /* TODO: bswap */ -/* 0xce */ x86emuOp2_illegal_op, /* TODO: bswap */ -/* 0xcf */ x86emuOp2_illegal_op, /* TODO: bswap */ - -/* 0xd0 */ x86emuOp2_illegal_op, -/* 0xd1 */ x86emuOp2_illegal_op, -/* 0xd2 */ x86emuOp2_illegal_op, -/* 0xd3 */ x86emuOp2_illegal_op, -/* 0xd4 */ x86emuOp2_illegal_op, -/* 0xd5 */ x86emuOp2_illegal_op, -/* 0xd6 */ x86emuOp2_illegal_op, -/* 0xd7 */ x86emuOp2_illegal_op, -/* 0xd8 */ x86emuOp2_illegal_op, -/* 0xd9 */ x86emuOp2_illegal_op, -/* 0xda */ x86emuOp2_illegal_op, -/* 0xdb */ x86emuOp2_illegal_op, -/* 0xdc */ x86emuOp2_illegal_op, -/* 0xdd */ x86emuOp2_illegal_op, -/* 0xde */ x86emuOp2_illegal_op, -/* 0xdf */ x86emuOp2_illegal_op, - -/* 0xe0 */ x86emuOp2_illegal_op, -/* 0xe1 */ x86emuOp2_illegal_op, -/* 0xe2 */ x86emuOp2_illegal_op, -/* 0xe3 */ x86emuOp2_illegal_op, -/* 0xe4 */ x86emuOp2_illegal_op, -/* 0xe5 */ x86emuOp2_illegal_op, -/* 0xe6 */ x86emuOp2_illegal_op, -/* 0xe7 */ x86emuOp2_illegal_op, -/* 0xe8 */ x86emuOp2_illegal_op, -/* 0xe9 */ x86emuOp2_illegal_op, -/* 0xea */ x86emuOp2_illegal_op, -/* 0xeb */ x86emuOp2_illegal_op, -/* 0xec */ x86emuOp2_illegal_op, -/* 0xed */ x86emuOp2_illegal_op, -/* 0xee */ x86emuOp2_illegal_op, -/* 0xef */ x86emuOp2_illegal_op, - -/* 0xf0 */ x86emuOp2_illegal_op, -/* 0xf1 */ x86emuOp2_illegal_op, -/* 0xf2 */ x86emuOp2_illegal_op, -/* 0xf3 */ x86emuOp2_illegal_op, -/* 0xf4 */ x86emuOp2_illegal_op, -/* 0xf5 */ x86emuOp2_illegal_op, -/* 0xf6 */ x86emuOp2_illegal_op, -/* 0xf7 */ x86emuOp2_illegal_op, -/* 0xf8 */ x86emuOp2_illegal_op, -/* 0xf9 */ x86emuOp2_illegal_op, -/* 0xfa */ x86emuOp2_illegal_op, -/* 0xfb */ x86emuOp2_illegal_op, -/* 0xfc */ x86emuOp2_illegal_op, -/* 0xfd */ x86emuOp2_illegal_op, -/* 0xfe */ x86emuOp2_illegal_op, -/* 0xff */ x86emuOp2_illegal_op, -}; diff --git a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/prim_ops.c b/qemu/roms/u-boot/drivers/bios_emulator/x86emu/prim_ops.c deleted file mode 100644 index 5f6c795fb..000000000 --- a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/prim_ops.c +++ /dev/null @@ -1,2442 +0,0 @@ -/**************************************************************************** -* -* Realmode X86 Emulator Library -* -* Copyright (C) 1991-2004 SciTech Software, Inc. -* Copyright (C) David Mosberger-Tang -* Copyright (C) 1999 Egbert Eich -* -* ======================================================================== -* -* Permission to use, copy, modify, distribute, and sell this software and -* its documentation for any purpose is hereby granted without fee, -* provided that the above copyright notice appear in all copies and that -* both that copyright notice and this permission notice appear in -* supporting documentation, and that the name of the authors not be used -* in advertising or publicity pertaining to distribution of the software -* without specific, written prior permission. The authors makes no -* representations about the suitability of this software for any purpose. -* It is provided "as is" without express or implied warranty. -* -* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, -* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO -* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR -* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF -* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR -* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR -* PERFORMANCE OF THIS SOFTWARE. -* -* ======================================================================== -* -* Language: ANSI C -* Environment: Any -* Developer: Kendall Bennett -* -* Description: This file contains the code to implement the primitive -* machine operations used by the emulation code in ops.c -* -* Carry Chain Calculation -* -* This represents a somewhat expensive calculation which is -* apparently required to emulate the setting of the OF343364 and AF flag. -* The latter is not so important, but the former is. The overflow -* flag is the XOR of the top two bits of the carry chain for an -* addition (similar for subtraction). Since we do not want to -* simulate the addition in a bitwise manner, we try to calculate the -* carry chain given the two operands and the result. -* -* So, given the following table, which represents the addition of two -* bits, we can derive a formula for the carry chain. -* -* a b cin r cout -* 0 0 0 0 0 -* 0 0 1 1 0 -* 0 1 0 1 0 -* 0 1 1 0 1 -* 1 0 0 1 0 -* 1 0 1 0 1 -* 1 1 0 0 1 -* 1 1 1 1 1 -* -* Construction of table for cout: -* -* ab -* r \ 00 01 11 10 -* |------------------ -* 0 | 0 1 1 1 -* 1 | 0 0 1 0 -* -* By inspection, one gets: cc = ab + r'(a + b) -* -* That represents alot of operations, but NO CHOICE.... -* -* Borrow Chain Calculation. -* -* The following table represents the subtraction of two bits, from -* which we can derive a formula for the borrow chain. -* -* a b bin r bout -* 0 0 0 0 0 -* 0 0 1 1 1 -* 0 1 0 1 1 -* 0 1 1 0 1 -* 1 0 0 1 0 -* 1 0 1 0 0 -* 1 1 0 0 0 -* 1 1 1 1 1 -* -* Construction of table for cout: -* -* ab -* r \ 00 01 11 10 -* |------------------ -* 0 | 0 1 0 0 -* 1 | 1 1 1 0 -* -* By inspection, one gets: bc = a'b + r(a' + b) -* -****************************************************************************/ - -#include <common.h> - -#define PRIM_OPS_NO_REDEFINE_ASM -#include "x86emu/x86emui.h" - -/*------------------------- Global Variables ------------------------------*/ - -static u32 x86emu_parity_tab[8] = -{ - 0x96696996, - 0x69969669, - 0x69969669, - 0x96696996, - 0x69969669, - 0x96696996, - 0x96696996, - 0x69969669, -}; - -#define PARITY(x) (((x86emu_parity_tab[(x) / 32] >> ((x) % 32)) & 1) == 0) -#define XOR2(x) (((x) ^ ((x)>>1)) & 0x1) - -/*----------------------------- Implementation ----------------------------*/ - - -/*--------- Side effects helper functions -------*/ - -/**************************************************************************** -REMARKS: -implements side efects for byte operations that don't overflow -****************************************************************************/ - -static void set_parity_flag(u32 res) -{ - CONDITIONAL_SET_FLAG(PARITY(res & 0xFF), F_PF); -} - -static void set_szp_flags_8(u8 res) -{ - CONDITIONAL_SET_FLAG(res & 0x80, F_SF); - CONDITIONAL_SET_FLAG(res == 0, F_ZF); - set_parity_flag(res); -} - -static void set_szp_flags_16(u16 res) -{ - CONDITIONAL_SET_FLAG(res & 0x8000, F_SF); - CONDITIONAL_SET_FLAG(res == 0, F_ZF); - set_parity_flag(res); -} - -static void set_szp_flags_32(u32 res) -{ - CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF); - CONDITIONAL_SET_FLAG(res == 0, F_ZF); - set_parity_flag(res); -} - -static void no_carry_byte_side_eff(u8 res) -{ - CLEAR_FLAG(F_OF); - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_AF); - set_szp_flags_8(res); -} - -static void no_carry_word_side_eff(u16 res) -{ - CLEAR_FLAG(F_OF); - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_AF); - set_szp_flags_16(res); -} - -static void no_carry_long_side_eff(u32 res) -{ - CLEAR_FLAG(F_OF); - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_AF); - set_szp_flags_32(res); -} - -static void calc_carry_chain(int bits, u32 d, u32 s, u32 res, int set_carry) -{ - u32 cc; - - cc = (s & d) | ((~res) & (s | d)); - CONDITIONAL_SET_FLAG(XOR2(cc >> (bits - 2)), F_OF); - CONDITIONAL_SET_FLAG(cc & 0x8, F_AF); - if (set_carry) { - CONDITIONAL_SET_FLAG(res & (1 << bits), F_CF); - } -} - -static void calc_borrow_chain(int bits, u32 d, u32 s, u32 res, int set_carry) -{ - u32 bc; - - bc = (res & (~d | s)) | (~d & s); - CONDITIONAL_SET_FLAG(XOR2(bc >> (bits - 2)), F_OF); - CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); - if (set_carry) { - CONDITIONAL_SET_FLAG(bc & (1 << (bits - 1)), F_CF); - } -} - -/**************************************************************************** -REMARKS: -Implements the AAA instruction and side effects. -****************************************************************************/ -u16 aaa_word(u16 d) -{ - u16 res; - if ((d & 0xf) > 0x9 || ACCESS_FLAG(F_AF)) { - d += 0x6; - d += 0x100; - SET_FLAG(F_AF); - SET_FLAG(F_CF); - } else { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_AF); - } - res = (u16)(d & 0xFF0F); - set_szp_flags_16(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the AAA instruction and side effects. -****************************************************************************/ -u16 aas_word(u16 d) -{ - u16 res; - if ((d & 0xf) > 0x9 || ACCESS_FLAG(F_AF)) { - d -= 0x6; - d -= 0x100; - SET_FLAG(F_AF); - SET_FLAG(F_CF); - } else { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_AF); - } - res = (u16)(d & 0xFF0F); - set_szp_flags_16(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the AAD instruction and side effects. -****************************************************************************/ -u16 aad_word(u16 d) -{ - u16 l; - u8 hb, lb; - - hb = (u8)((d >> 8) & 0xff); - lb = (u8)((d & 0xff)); - l = (u16)((lb + 10 * hb) & 0xFF); - - no_carry_byte_side_eff(l & 0xFF); - return l; -} - -/**************************************************************************** -REMARKS: -Implements the AAM instruction and side effects. -****************************************************************************/ -u16 aam_word(u8 d) -{ - u16 h, l; - - h = (u16)(d / 10); - l = (u16)(d % 10); - l |= (u16)(h << 8); - - no_carry_byte_side_eff(l & 0xFF); - return l; -} - -/**************************************************************************** -REMARKS: -Implements the ADC instruction and side effects. -****************************************************************************/ -u8 adc_byte(u8 d, u8 s) -{ - u32 res; /* all operands in native machine order */ - - res = d + s; - if (ACCESS_FLAG(F_CF)) res++; - - set_szp_flags_8(res); - calc_carry_chain(8,s,d,res,1); - - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the ADC instruction and side effects. -****************************************************************************/ -u16 adc_word(u16 d, u16 s) -{ - u32 res; /* all operands in native machine order */ - - res = d + s; - if (ACCESS_FLAG(F_CF)) - res++; - - set_szp_flags_16((u16)res); - calc_carry_chain(16,s,d,res,1); - - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the ADC instruction and side effects. -****************************************************************************/ -u32 adc_long(u32 d, u32 s) -{ - u32 lo; /* all operands in native machine order */ - u32 hi; - u32 res; - - lo = (d & 0xFFFF) + (s & 0xFFFF); - res = d + s; - - if (ACCESS_FLAG(F_CF)) { - lo++; - res++; - } - - hi = (lo >> 16) + (d >> 16) + (s >> 16); - - set_szp_flags_32(res); - calc_carry_chain(32,s,d,res,0); - - CONDITIONAL_SET_FLAG(hi & 0x10000, F_CF); - - return res; -} - -/**************************************************************************** -REMARKS: -Implements the ADD instruction and side effects. -****************************************************************************/ -u8 add_byte(u8 d, u8 s) -{ - u32 res; /* all operands in native machine order */ - - res = d + s; - set_szp_flags_8((u8)res); - calc_carry_chain(8,s,d,res,1); - - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the ADD instruction and side effects. -****************************************************************************/ -u16 add_word(u16 d, u16 s) -{ - u32 res; /* all operands in native machine order */ - - res = d + s; - set_szp_flags_16((u16)res); - calc_carry_chain(16,s,d,res,1); - - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the ADD instruction and side effects. -****************************************************************************/ -u32 add_long(u32 d, u32 s) -{ - u32 res; - - res = d + s; - set_szp_flags_32(res); - calc_carry_chain(32,s,d,res,0); - - CONDITIONAL_SET_FLAG(res < d || res < s, F_CF); - - return res; -} - -/**************************************************************************** -REMARKS: -Implements the AND instruction and side effects. -****************************************************************************/ -u8 and_byte(u8 d, u8 s) -{ - u8 res; /* all operands in native machine order */ - - res = d & s; - - no_carry_byte_side_eff(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the AND instruction and side effects. -****************************************************************************/ -u16 and_word(u16 d, u16 s) -{ - u16 res; /* all operands in native machine order */ - - res = d & s; - - no_carry_word_side_eff(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the AND instruction and side effects. -****************************************************************************/ -u32 and_long(u32 d, u32 s) -{ - u32 res; /* all operands in native machine order */ - - res = d & s; - no_carry_long_side_eff(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the CMP instruction and side effects. -****************************************************************************/ -u8 cmp_byte(u8 d, u8 s) -{ - u32 res; /* all operands in native machine order */ - - res = d - s; - set_szp_flags_8((u8)res); - calc_borrow_chain(8, d, s, res, 1); - - return d; -} - -/**************************************************************************** -REMARKS: -Implements the CMP instruction and side effects. -****************************************************************************/ -u16 cmp_word(u16 d, u16 s) -{ - u32 res; /* all operands in native machine order */ - - res = d - s; - set_szp_flags_16((u16)res); - calc_borrow_chain(16, d, s, res, 1); - - return d; -} - -/**************************************************************************** -REMARKS: -Implements the CMP instruction and side effects. -****************************************************************************/ -u32 cmp_long(u32 d, u32 s) -{ - u32 res; /* all operands in native machine order */ - - res = d - s; - set_szp_flags_32(res); - calc_borrow_chain(32, d, s, res, 1); - - return d; -} - -/**************************************************************************** -REMARKS: -Implements the DAA instruction and side effects. -****************************************************************************/ -u8 daa_byte(u8 d) -{ - u32 res = d; - if ((d & 0xf) > 9 || ACCESS_FLAG(F_AF)) { - res += 6; - SET_FLAG(F_AF); - } - if (res > 0x9F || ACCESS_FLAG(F_CF)) { - res += 0x60; - SET_FLAG(F_CF); - } - set_szp_flags_8((u8)res); - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the DAS instruction and side effects. -****************************************************************************/ -u8 das_byte(u8 d) -{ - if ((d & 0xf) > 9 || ACCESS_FLAG(F_AF)) { - d -= 6; - SET_FLAG(F_AF); - } - if (d > 0x9F || ACCESS_FLAG(F_CF)) { - d -= 0x60; - SET_FLAG(F_CF); - } - set_szp_flags_8(d); - return d; -} - -/**************************************************************************** -REMARKS: -Implements the DEC instruction and side effects. -****************************************************************************/ -u8 dec_byte(u8 d) -{ - u32 res; /* all operands in native machine order */ - - res = d - 1; - set_szp_flags_8((u8)res); - calc_borrow_chain(8, d, 1, res, 0); - - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the DEC instruction and side effects. -****************************************************************************/ -u16 dec_word(u16 d) -{ - u32 res; /* all operands in native machine order */ - - res = d - 1; - set_szp_flags_16((u16)res); - calc_borrow_chain(16, d, 1, res, 0); - - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the DEC instruction and side effects. -****************************************************************************/ -u32 dec_long(u32 d) -{ - u32 res; /* all operands in native machine order */ - - res = d - 1; - - set_szp_flags_32(res); - calc_borrow_chain(32, d, 1, res, 0); - - return res; -} - -/**************************************************************************** -REMARKS: -Implements the INC instruction and side effects. -****************************************************************************/ -u8 inc_byte(u8 d) -{ - u32 res; /* all operands in native machine order */ - - res = d + 1; - set_szp_flags_8((u8)res); - calc_carry_chain(8, d, 1, res, 0); - - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the INC instruction and side effects. -****************************************************************************/ -u16 inc_word(u16 d) -{ - u32 res; /* all operands in native machine order */ - - res = d + 1; - set_szp_flags_16((u16)res); - calc_carry_chain(16, d, 1, res, 0); - - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the INC instruction and side effects. -****************************************************************************/ -u32 inc_long(u32 d) -{ - u32 res; /* all operands in native machine order */ - - res = d + 1; - set_szp_flags_32(res); - calc_carry_chain(32, d, 1, res, 0); - - return res; -} - -/**************************************************************************** -REMARKS: -Implements the OR instruction and side effects. -****************************************************************************/ -u8 or_byte(u8 d, u8 s) -{ - u8 res; /* all operands in native machine order */ - - res = d | s; - no_carry_byte_side_eff(res); - - return res; -} - -/**************************************************************************** -REMARKS: -Implements the OR instruction and side effects. -****************************************************************************/ -u16 or_word(u16 d, u16 s) -{ - u16 res; /* all operands in native machine order */ - - res = d | s; - no_carry_word_side_eff(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the OR instruction and side effects. -****************************************************************************/ -u32 or_long(u32 d, u32 s) -{ - u32 res; /* all operands in native machine order */ - - res = d | s; - no_carry_long_side_eff(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the OR instruction and side effects. -****************************************************************************/ -u8 neg_byte(u8 s) -{ - u8 res; - - CONDITIONAL_SET_FLAG(s != 0, F_CF); - res = (u8)-s; - set_szp_flags_8(res); - calc_borrow_chain(8, 0, s, res, 0); - - return res; -} - -/**************************************************************************** -REMARKS: -Implements the OR instruction and side effects. -****************************************************************************/ -u16 neg_word(u16 s) -{ - u16 res; - - CONDITIONAL_SET_FLAG(s != 0, F_CF); - res = (u16)-s; - set_szp_flags_16((u16)res); - calc_borrow_chain(16, 0, s, res, 0); - - return res; -} - -/**************************************************************************** -REMARKS: -Implements the OR instruction and side effects. -****************************************************************************/ -u32 neg_long(u32 s) -{ - u32 res; - - CONDITIONAL_SET_FLAG(s != 0, F_CF); - res = (u32)-s; - set_szp_flags_32(res); - calc_borrow_chain(32, 0, s, res, 0); - - return res; -} - -/**************************************************************************** -REMARKS: -Implements the NOT instruction and side effects. -****************************************************************************/ -u8 not_byte(u8 s) -{ - return ~s; -} - -/**************************************************************************** -REMARKS: -Implements the NOT instruction and side effects. -****************************************************************************/ -u16 not_word(u16 s) -{ - return ~s; -} - -/**************************************************************************** -REMARKS: -Implements the NOT instruction and side effects. -****************************************************************************/ -u32 not_long(u32 s) -{ - return ~s; -} - -/**************************************************************************** -REMARKS: -Implements the RCL instruction and side effects. -****************************************************************************/ -u8 rcl_byte(u8 d, u8 s) -{ - unsigned int res, cnt, mask, cf; - - /* s is the rotate distance. It varies from 0 - 8. */ - /* have - - CF B_7 B_6 B_5 B_4 B_3 B_2 B_1 B_0 - - want to rotate through the carry by "s" bits. We could - loop, but that's inefficient. So the width is 9, - and we split into three parts: - - The new carry flag (was B_n) - the stuff in B_n-1 .. B_0 - the stuff in B_7 .. B_n+1 - - The new rotate is done mod 9, and given this, - for a rotation of n bits (mod 9) the new carry flag is - then located n bits from the MSB. The low part is - then shifted up cnt bits, and the high part is or'd - in. Using CAPS for new values, and lowercase for the - original values, this can be expressed as: - - IF n > 0 - 1) CF <- b_(8-n) - 2) B_(7) .. B_(n) <- b_(8-(n+1)) .. b_0 - 3) B_(n-1) <- cf - 4) B_(n-2) .. B_0 <- b_7 .. b_(8-(n-1)) - */ - res = d; - if ((cnt = s % 9) != 0) { - /* extract the new CARRY FLAG. */ - /* CF <- b_(8-n) */ - cf = (d >> (8 - cnt)) & 0x1; - - /* get the low stuff which rotated - into the range B_7 .. B_cnt */ - /* B_(7) .. B_(n) <- b_(8-(n+1)) .. b_0 */ - /* note that the right hand side done by the mask */ - res = (d << cnt) & 0xff; - - /* now the high stuff which rotated around - into the positions B_cnt-2 .. B_0 */ - /* B_(n-2) .. B_0 <- b_7 .. b_(8-(n-1)) */ - /* shift it downward, 7-(n-2) = 9-n positions. - and mask off the result before or'ing in. - */ - mask = (1 << (cnt - 1)) - 1; - res |= (d >> (9 - cnt)) & mask; - - /* if the carry flag was set, or it in. */ - if (ACCESS_FLAG(F_CF)) { /* carry flag is set */ - /* B_(n-1) <- cf */ - res |= 1 << (cnt - 1); - } - /* set the new carry flag, based on the variable "cf" */ - CONDITIONAL_SET_FLAG(cf, F_CF); - /* OVERFLOW is set *IFF* cnt==1, then it is the - xor of CF and the most significant bit. Blecck. */ - /* parenthesized this expression since it appears to - be causing OF to be misset */ - CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 6) & 0x2)), - F_OF); - - } - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the RCL instruction and side effects. -****************************************************************************/ -u16 rcl_word(u16 d, u8 s) -{ - unsigned int res, cnt, mask, cf; - - res = d; - if ((cnt = s % 17) != 0) { - cf = (d >> (16 - cnt)) & 0x1; - res = (d << cnt) & 0xffff; - mask = (1 << (cnt - 1)) - 1; - res |= (d >> (17 - cnt)) & mask; - if (ACCESS_FLAG(F_CF)) { - res |= 1 << (cnt - 1); - } - CONDITIONAL_SET_FLAG(cf, F_CF); - CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 14) & 0x2)), - F_OF); - } - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the RCL instruction and side effects. -****************************************************************************/ -u32 rcl_long(u32 d, u8 s) -{ - u32 res, cnt, mask, cf; - - res = d; - if ((cnt = s % 33) != 0) { - cf = (d >> (32 - cnt)) & 0x1; - res = (d << cnt) & 0xffffffff; - mask = (1 << (cnt - 1)) - 1; - res |= (d >> (33 - cnt)) & mask; - if (ACCESS_FLAG(F_CF)) { /* carry flag is set */ - res |= 1 << (cnt - 1); - } - CONDITIONAL_SET_FLAG(cf, F_CF); - CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 30) & 0x2)), - F_OF); - } - return res; -} - -/**************************************************************************** -REMARKS: -Implements the RCR instruction and side effects. -****************************************************************************/ -u8 rcr_byte(u8 d, u8 s) -{ - u32 res, cnt; - u32 mask, cf, ocf = 0; - - /* rotate right through carry */ - /* - s is the rotate distance. It varies from 0 - 8. - d is the byte object rotated. - - have - - CF B_7 B_6 B_5 B_4 B_3 B_2 B_1 B_0 - - The new rotate is done mod 9, and given this, - for a rotation of n bits (mod 9) the new carry flag is - then located n bits from the LSB. The low part is - then shifted up cnt bits, and the high part is or'd - in. Using CAPS for new values, and lowercase for the - original values, this can be expressed as: - - IF n > 0 - 1) CF <- b_(n-1) - 2) B_(8-(n+1)) .. B_(0) <- b_(7) .. b_(n) - 3) B_(8-n) <- cf - 4) B_(7) .. B_(8-(n-1)) <- b_(n-2) .. b_(0) - */ - res = d; - if ((cnt = s % 9) != 0) { - /* extract the new CARRY FLAG. */ - /* CF <- b_(n-1) */ - if (cnt == 1) { - cf = d & 0x1; - /* note hackery here. Access_flag(..) evaluates to either - 0 if flag not set - non-zero if flag is set. - doing access_flag(..) != 0 casts that into either - 0..1 in any representation of the flags register - (i.e. packed bit array or unpacked.) - */ - ocf = ACCESS_FLAG(F_CF) != 0; - } else - cf = (d >> (cnt - 1)) & 0x1; - - /* B_(8-(n+1)) .. B_(0) <- b_(7) .. b_n */ - /* note that the right hand side done by the mask - This is effectively done by shifting the - object to the right. The result must be masked, - in case the object came in and was treated - as a negative number. Needed??? */ - - mask = (1 << (8 - cnt)) - 1; - res = (d >> cnt) & mask; - - /* now the high stuff which rotated around - into the positions B_cnt-2 .. B_0 */ - /* B_(7) .. B_(8-(n-1)) <- b_(n-2) .. b_(0) */ - /* shift it downward, 7-(n-2) = 9-n positions. - and mask off the result before or'ing in. - */ - res |= (d << (9 - cnt)); - - /* if the carry flag was set, or it in. */ - if (ACCESS_FLAG(F_CF)) { /* carry flag is set */ - /* B_(8-n) <- cf */ - res |= 1 << (8 - cnt); - } - /* set the new carry flag, based on the variable "cf" */ - CONDITIONAL_SET_FLAG(cf, F_CF); - /* OVERFLOW is set *IFF* cnt==1, then it is the - xor of CF and the most significant bit. Blecck. */ - /* parenthesized... */ - if (cnt == 1) { - CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 6) & 0x2)), - F_OF); - } - } - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the RCR instruction and side effects. -****************************************************************************/ -u16 rcr_word(u16 d, u8 s) -{ - u32 res, cnt; - u32 mask, cf, ocf = 0; - - /* rotate right through carry */ - res = d; - if ((cnt = s % 17) != 0) { - if (cnt == 1) { - cf = d & 0x1; - ocf = ACCESS_FLAG(F_CF) != 0; - } else - cf = (d >> (cnt - 1)) & 0x1; - mask = (1 << (16 - cnt)) - 1; - res = (d >> cnt) & mask; - res |= (d << (17 - cnt)); - if (ACCESS_FLAG(F_CF)) { - res |= 1 << (16 - cnt); - } - CONDITIONAL_SET_FLAG(cf, F_CF); - if (cnt == 1) { - CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 14) & 0x2)), - F_OF); - } - } - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the RCR instruction and side effects. -****************************************************************************/ -u32 rcr_long(u32 d, u8 s) -{ - u32 res, cnt; - u32 mask, cf, ocf = 0; - - /* rotate right through carry */ - res = d; - if ((cnt = s % 33) != 0) { - if (cnt == 1) { - cf = d & 0x1; - ocf = ACCESS_FLAG(F_CF) != 0; - } else - cf = (d >> (cnt - 1)) & 0x1; - mask = (1 << (32 - cnt)) - 1; - res = (d >> cnt) & mask; - if (cnt != 1) - res |= (d << (33 - cnt)); - if (ACCESS_FLAG(F_CF)) { /* carry flag is set */ - res |= 1 << (32 - cnt); - } - CONDITIONAL_SET_FLAG(cf, F_CF); - if (cnt == 1) { - CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 30) & 0x2)), - F_OF); - } - } - return res; -} - -/**************************************************************************** -REMARKS: -Implements the ROL instruction and side effects. -****************************************************************************/ -u8 rol_byte(u8 d, u8 s) -{ - unsigned int res, cnt, mask; - - /* rotate left */ - /* - s is the rotate distance. It varies from 0 - 8. - d is the byte object rotated. - - have - - CF B_7 ... B_0 - - The new rotate is done mod 8. - Much simpler than the "rcl" or "rcr" operations. - - IF n > 0 - 1) B_(7) .. B_(n) <- b_(8-(n+1)) .. b_(0) - 2) B_(n-1) .. B_(0) <- b_(7) .. b_(8-n) - */ - res = d; - if ((cnt = s % 8) != 0) { - /* B_(7) .. B_(n) <- b_(8-(n+1)) .. b_(0) */ - res = (d << cnt); - - /* B_(n-1) .. B_(0) <- b_(7) .. b_(8-n) */ - mask = (1 << cnt) - 1; - res |= (d >> (8 - cnt)) & mask; - - /* set the new carry flag, Note that it is the low order - bit of the result!!! */ - CONDITIONAL_SET_FLAG(res & 0x1, F_CF); - /* OVERFLOW is set *IFF* s==1, then it is the - xor of CF and the most significant bit. Blecck. */ - CONDITIONAL_SET_FLAG(s == 1 && - XOR2((res & 0x1) + ((res >> 6) & 0x2)), - F_OF); - } if (s != 0) { - /* set the new carry flag, Note that it is the low order - bit of the result!!! */ - CONDITIONAL_SET_FLAG(res & 0x1, F_CF); - } - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the ROL instruction and side effects. -****************************************************************************/ -u16 rol_word(u16 d, u8 s) -{ - unsigned int res, cnt, mask; - - res = d; - if ((cnt = s % 16) != 0) { - res = (d << cnt); - mask = (1 << cnt) - 1; - res |= (d >> (16 - cnt)) & mask; - CONDITIONAL_SET_FLAG(res & 0x1, F_CF); - CONDITIONAL_SET_FLAG(s == 1 && - XOR2((res & 0x1) + ((res >> 14) & 0x2)), - F_OF); - } if (s != 0) { - /* set the new carry flag, Note that it is the low order - bit of the result!!! */ - CONDITIONAL_SET_FLAG(res & 0x1, F_CF); - } - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the ROL instruction and side effects. -****************************************************************************/ -u32 rol_long(u32 d, u8 s) -{ - u32 res, cnt, mask; - - res = d; - if ((cnt = s % 32) != 0) { - res = (d << cnt); - mask = (1 << cnt) - 1; - res |= (d >> (32 - cnt)) & mask; - CONDITIONAL_SET_FLAG(res & 0x1, F_CF); - CONDITIONAL_SET_FLAG(s == 1 && - XOR2((res & 0x1) + ((res >> 30) & 0x2)), - F_OF); - } if (s != 0) { - /* set the new carry flag, Note that it is the low order - bit of the result!!! */ - CONDITIONAL_SET_FLAG(res & 0x1, F_CF); - } - return res; -} - -/**************************************************************************** -REMARKS: -Implements the ROR instruction and side effects. -****************************************************************************/ -u8 ror_byte(u8 d, u8 s) -{ - unsigned int res, cnt, mask; - - /* rotate right */ - /* - s is the rotate distance. It varies from 0 - 8. - d is the byte object rotated. - - have - - B_7 ... B_0 - - The rotate is done mod 8. - - IF n > 0 - 1) B_(8-(n+1)) .. B_(0) <- b_(7) .. b_(n) - 2) B_(7) .. B_(8-n) <- b_(n-1) .. b_(0) - */ - res = d; - if ((cnt = s % 8) != 0) { /* not a typo, do nada if cnt==0 */ - /* B_(7) .. B_(8-n) <- b_(n-1) .. b_(0) */ - res = (d << (8 - cnt)); - - /* B_(8-(n+1)) .. B_(0) <- b_(7) .. b_(n) */ - mask = (1 << (8 - cnt)) - 1; - res |= (d >> (cnt)) & mask; - - /* set the new carry flag, Note that it is the low order - bit of the result!!! */ - CONDITIONAL_SET_FLAG(res & 0x80, F_CF); - /* OVERFLOW is set *IFF* s==1, then it is the - xor of the two most significant bits. Blecck. */ - CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 6), F_OF); - } else if (s != 0) { - /* set the new carry flag, Note that it is the low order - bit of the result!!! */ - CONDITIONAL_SET_FLAG(res & 0x80, F_CF); - } - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the ROR instruction and side effects. -****************************************************************************/ -u16 ror_word(u16 d, u8 s) -{ - unsigned int res, cnt, mask; - - res = d; - if ((cnt = s % 16) != 0) { - res = (d << (16 - cnt)); - mask = (1 << (16 - cnt)) - 1; - res |= (d >> (cnt)) & mask; - CONDITIONAL_SET_FLAG(res & 0x8000, F_CF); - CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 14), F_OF); - } else if (s != 0) { - /* set the new carry flag, Note that it is the low order - bit of the result!!! */ - CONDITIONAL_SET_FLAG(res & 0x8000, F_CF); - } - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the ROR instruction and side effects. -****************************************************************************/ -u32 ror_long(u32 d, u8 s) -{ - u32 res, cnt, mask; - - res = d; - if ((cnt = s % 32) != 0) { - res = (d << (32 - cnt)); - mask = (1 << (32 - cnt)) - 1; - res |= (d >> (cnt)) & mask; - CONDITIONAL_SET_FLAG(res & 0x80000000, F_CF); - CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 30), F_OF); - } else if (s != 0) { - /* set the new carry flag, Note that it is the low order - bit of the result!!! */ - CONDITIONAL_SET_FLAG(res & 0x80000000, F_CF); - } - return res; -} - -/**************************************************************************** -REMARKS: -Implements the SHL instruction and side effects. -****************************************************************************/ -u8 shl_byte(u8 d, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 8) { - cnt = s % 8; - - /* last bit shifted out goes into carry flag */ - if (cnt > 0) { - res = d << cnt; - cf = d & (1 << (8 - cnt)); - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_8((u8)res); - } else { - res = (u8) d; - } - - if (cnt == 1) { - /* Needs simplification. */ - CONDITIONAL_SET_FLAG( - (((res & 0x80) == 0x80) ^ - (ACCESS_FLAG(F_CF) != 0)), - /* was (M.x86.R_FLG&F_CF)==F_CF)), */ - F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CONDITIONAL_SET_FLAG((d << (s-1)) & 0x80, F_CF); - CLEAR_FLAG(F_OF); - CLEAR_FLAG(F_SF); - SET_FLAG(F_PF); - SET_FLAG(F_ZF); - } - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the SHL instruction and side effects. -****************************************************************************/ -u16 shl_word(u16 d, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 16) { - cnt = s % 16; - if (cnt > 0) { - res = d << cnt; - cf = d & (1 << (16 - cnt)); - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_16((u16)res); - } else { - res = (u16) d; - } - - if (cnt == 1) { - CONDITIONAL_SET_FLAG( - (((res & 0x8000) == 0x8000) ^ - (ACCESS_FLAG(F_CF) != 0)), - F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CONDITIONAL_SET_FLAG((d << (s-1)) & 0x8000, F_CF); - CLEAR_FLAG(F_OF); - CLEAR_FLAG(F_SF); - SET_FLAG(F_PF); - SET_FLAG(F_ZF); - } - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the SHL instruction and side effects. -****************************************************************************/ -u32 shl_long(u32 d, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 32) { - cnt = s % 32; - if (cnt > 0) { - res = d << cnt; - cf = d & (1 << (32 - cnt)); - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_32((u32)res); - } else { - res = d; - } - if (cnt == 1) { - CONDITIONAL_SET_FLAG((((res & 0x80000000) == 0x80000000) ^ - (ACCESS_FLAG(F_CF) != 0)), F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CONDITIONAL_SET_FLAG((d << (s-1)) & 0x80000000, F_CF); - CLEAR_FLAG(F_OF); - CLEAR_FLAG(F_SF); - SET_FLAG(F_PF); - SET_FLAG(F_ZF); - } - return res; -} - -/**************************************************************************** -REMARKS: -Implements the SHR instruction and side effects. -****************************************************************************/ -u8 shr_byte(u8 d, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 8) { - cnt = s % 8; - if (cnt > 0) { - cf = d & (1 << (cnt - 1)); - res = d >> cnt; - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_8((u8)res); - } else { - res = (u8) d; - } - - if (cnt == 1) { - CONDITIONAL_SET_FLAG(XOR2(res >> 6), F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CONDITIONAL_SET_FLAG((d >> (s-1)) & 0x1, F_CF); - CLEAR_FLAG(F_OF); - CLEAR_FLAG(F_SF); - SET_FLAG(F_PF); - SET_FLAG(F_ZF); - } - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the SHR instruction and side effects. -****************************************************************************/ -u16 shr_word(u16 d, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 16) { - cnt = s % 16; - if (cnt > 0) { - cf = d & (1 << (cnt - 1)); - res = d >> cnt; - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_16((u16)res); - } else { - res = d; - } - - if (cnt == 1) { - CONDITIONAL_SET_FLAG(XOR2(res >> 14), F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - SET_FLAG(F_ZF); - CLEAR_FLAG(F_SF); - CLEAR_FLAG(F_PF); - } - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the SHR instruction and side effects. -****************************************************************************/ -u32 shr_long(u32 d, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 32) { - cnt = s % 32; - if (cnt > 0) { - cf = d & (1 << (cnt - 1)); - res = d >> cnt; - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_32((u32)res); - } else { - res = d; - } - if (cnt == 1) { - CONDITIONAL_SET_FLAG(XOR2(res >> 30), F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - SET_FLAG(F_ZF); - CLEAR_FLAG(F_SF); - CLEAR_FLAG(F_PF); - } - return res; -} - -/**************************************************************************** -REMARKS: -Implements the SAR instruction and side effects. -****************************************************************************/ -u8 sar_byte(u8 d, u8 s) -{ - unsigned int cnt, res, cf, mask, sf; - - res = d; - sf = d & 0x80; - cnt = s % 8; - if (cnt > 0 && cnt < 8) { - mask = (1 << (8 - cnt)) - 1; - cf = d & (1 << (cnt - 1)); - res = (d >> cnt) & mask; - CONDITIONAL_SET_FLAG(cf, F_CF); - if (sf) { - res |= ~mask; - } - set_szp_flags_8((u8)res); - } else if (cnt >= 8) { - if (sf) { - res = 0xff; - SET_FLAG(F_CF); - CLEAR_FLAG(F_ZF); - SET_FLAG(F_SF); - SET_FLAG(F_PF); - } else { - res = 0; - CLEAR_FLAG(F_CF); - SET_FLAG(F_ZF); - CLEAR_FLAG(F_SF); - CLEAR_FLAG(F_PF); - } - } - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the SAR instruction and side effects. -****************************************************************************/ -u16 sar_word(u16 d, u8 s) -{ - unsigned int cnt, res, cf, mask, sf; - - sf = d & 0x8000; - cnt = s % 16; - res = d; - if (cnt > 0 && cnt < 16) { - mask = (1 << (16 - cnt)) - 1; - cf = d & (1 << (cnt - 1)); - res = (d >> cnt) & mask; - CONDITIONAL_SET_FLAG(cf, F_CF); - if (sf) { - res |= ~mask; - } - set_szp_flags_16((u16)res); - } else if (cnt >= 16) { - if (sf) { - res = 0xffff; - SET_FLAG(F_CF); - CLEAR_FLAG(F_ZF); - SET_FLAG(F_SF); - SET_FLAG(F_PF); - } else { - res = 0; - CLEAR_FLAG(F_CF); - SET_FLAG(F_ZF); - CLEAR_FLAG(F_SF); - CLEAR_FLAG(F_PF); - } - } - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the SAR instruction and side effects. -****************************************************************************/ -u32 sar_long(u32 d, u8 s) -{ - u32 cnt, res, cf, mask, sf; - - sf = d & 0x80000000; - cnt = s % 32; - res = d; - if (cnt > 0 && cnt < 32) { - mask = (1 << (32 - cnt)) - 1; - cf = d & (1 << (cnt - 1)); - res = (d >> cnt) & mask; - CONDITIONAL_SET_FLAG(cf, F_CF); - if (sf) { - res |= ~mask; - } - set_szp_flags_32(res); - } else if (cnt >= 32) { - if (sf) { - res = 0xffffffff; - SET_FLAG(F_CF); - CLEAR_FLAG(F_ZF); - SET_FLAG(F_SF); - SET_FLAG(F_PF); - } else { - res = 0; - CLEAR_FLAG(F_CF); - SET_FLAG(F_ZF); - CLEAR_FLAG(F_SF); - CLEAR_FLAG(F_PF); - } - } - return res; -} - -/**************************************************************************** -REMARKS: -Implements the SHLD instruction and side effects. -****************************************************************************/ -u16 shld_word (u16 d, u16 fill, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 16) { - cnt = s % 16; - if (cnt > 0) { - res = (d << cnt) | (fill >> (16-cnt)); - cf = d & (1 << (16 - cnt)); - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_16((u16)res); - } else { - res = d; - } - if (cnt == 1) { - CONDITIONAL_SET_FLAG((((res & 0x8000) == 0x8000) ^ - (ACCESS_FLAG(F_CF) != 0)), F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CONDITIONAL_SET_FLAG((d << (s-1)) & 0x8000, F_CF); - CLEAR_FLAG(F_OF); - CLEAR_FLAG(F_SF); - SET_FLAG(F_PF); - SET_FLAG(F_ZF); - } - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the SHLD instruction and side effects. -****************************************************************************/ -u32 shld_long (u32 d, u32 fill, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 32) { - cnt = s % 32; - if (cnt > 0) { - res = (d << cnt) | (fill >> (32-cnt)); - cf = d & (1 << (32 - cnt)); - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_32((u32)res); - } else { - res = d; - } - if (cnt == 1) { - CONDITIONAL_SET_FLAG((((res & 0x80000000) == 0x80000000) ^ - (ACCESS_FLAG(F_CF) != 0)), F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CONDITIONAL_SET_FLAG((d << (s-1)) & 0x80000000, F_CF); - CLEAR_FLAG(F_OF); - CLEAR_FLAG(F_SF); - SET_FLAG(F_PF); - SET_FLAG(F_ZF); - } - return res; -} - -/**************************************************************************** -REMARKS: -Implements the SHRD instruction and side effects. -****************************************************************************/ -u16 shrd_word (u16 d, u16 fill, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 16) { - cnt = s % 16; - if (cnt > 0) { - cf = d & (1 << (cnt - 1)); - res = (d >> cnt) | (fill << (16 - cnt)); - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_16((u16)res); - } else { - res = d; - } - - if (cnt == 1) { - CONDITIONAL_SET_FLAG(XOR2(res >> 14), F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - SET_FLAG(F_ZF); - CLEAR_FLAG(F_SF); - CLEAR_FLAG(F_PF); - } - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the SHRD instruction and side effects. -****************************************************************************/ -u32 shrd_long (u32 d, u32 fill, u8 s) -{ - unsigned int cnt, res, cf; - - if (s < 32) { - cnt = s % 32; - if (cnt > 0) { - cf = d & (1 << (cnt - 1)); - res = (d >> cnt) | (fill << (32 - cnt)); - CONDITIONAL_SET_FLAG(cf, F_CF); - set_szp_flags_32((u32)res); - } else { - res = d; - } - if (cnt == 1) { - CONDITIONAL_SET_FLAG(XOR2(res >> 30), F_OF); - } else { - CLEAR_FLAG(F_OF); - } - } else { - res = 0; - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - SET_FLAG(F_ZF); - CLEAR_FLAG(F_SF); - CLEAR_FLAG(F_PF); - } - return res; -} - -/**************************************************************************** -REMARKS: -Implements the SBB instruction and side effects. -****************************************************************************/ -u8 sbb_byte(u8 d, u8 s) -{ - u32 res; /* all operands in native machine order */ - u32 bc; - - if (ACCESS_FLAG(F_CF)) - res = d - s - 1; - else - res = d - s; - set_szp_flags_8((u8)res); - - /* calculate the borrow chain. See note at top */ - bc = (res & (~d | s)) | (~d & s); - CONDITIONAL_SET_FLAG(bc & 0x80, F_CF); - CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF); - CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the SBB instruction and side effects. -****************************************************************************/ -u16 sbb_word(u16 d, u16 s) -{ - u32 res; /* all operands in native machine order */ - u32 bc; - - if (ACCESS_FLAG(F_CF)) - res = d - s - 1; - else - res = d - s; - set_szp_flags_16((u16)res); - - /* calculate the borrow chain. See note at top */ - bc = (res & (~d | s)) | (~d & s); - CONDITIONAL_SET_FLAG(bc & 0x8000, F_CF); - CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF); - CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the SBB instruction and side effects. -****************************************************************************/ -u32 sbb_long(u32 d, u32 s) -{ - u32 res; /* all operands in native machine order */ - u32 bc; - - if (ACCESS_FLAG(F_CF)) - res = d - s - 1; - else - res = d - s; - - set_szp_flags_32(res); - - /* calculate the borrow chain. See note at top */ - bc = (res & (~d | s)) | (~d & s); - CONDITIONAL_SET_FLAG(bc & 0x80000000, F_CF); - CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF); - CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the SUB instruction and side effects. -****************************************************************************/ -u8 sub_byte(u8 d, u8 s) -{ - u32 res; /* all operands in native machine order */ - u32 bc; - - res = d - s; - set_szp_flags_8((u8)res); - - /* calculate the borrow chain. See note at top */ - bc = (res & (~d | s)) | (~d & s); - CONDITIONAL_SET_FLAG(bc & 0x80, F_CF); - CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF); - CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); - return (u8)res; -} - -/**************************************************************************** -REMARKS: -Implements the SUB instruction and side effects. -****************************************************************************/ -u16 sub_word(u16 d, u16 s) -{ - u32 res; /* all operands in native machine order */ - u32 bc; - - res = d - s; - set_szp_flags_16((u16)res); - - /* calculate the borrow chain. See note at top */ - bc = (res & (~d | s)) | (~d & s); - CONDITIONAL_SET_FLAG(bc & 0x8000, F_CF); - CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF); - CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); - return (u16)res; -} - -/**************************************************************************** -REMARKS: -Implements the SUB instruction and side effects. -****************************************************************************/ -u32 sub_long(u32 d, u32 s) -{ - u32 res; /* all operands in native machine order */ - u32 bc; - - res = d - s; - set_szp_flags_32(res); - - /* calculate the borrow chain. See note at top */ - bc = (res & (~d | s)) | (~d & s); - CONDITIONAL_SET_FLAG(bc & 0x80000000, F_CF); - CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF); - CONDITIONAL_SET_FLAG(bc & 0x8, F_AF); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the TEST instruction and side effects. -****************************************************************************/ -void test_byte(u8 d, u8 s) -{ - u32 res; /* all operands in native machine order */ - - res = d & s; - - CLEAR_FLAG(F_OF); - set_szp_flags_8((u8)res); - /* AF == dont care */ - CLEAR_FLAG(F_CF); -} - -/**************************************************************************** -REMARKS: -Implements the TEST instruction and side effects. -****************************************************************************/ -void test_word(u16 d, u16 s) -{ - u32 res; /* all operands in native machine order */ - - res = d & s; - - CLEAR_FLAG(F_OF); - set_szp_flags_16((u16)res); - /* AF == dont care */ - CLEAR_FLAG(F_CF); -} - -/**************************************************************************** -REMARKS: -Implements the TEST instruction and side effects. -****************************************************************************/ -void test_long(u32 d, u32 s) -{ - u32 res; /* all operands in native machine order */ - - res = d & s; - - CLEAR_FLAG(F_OF); - set_szp_flags_32(res); - /* AF == dont care */ - CLEAR_FLAG(F_CF); -} - -/**************************************************************************** -REMARKS: -Implements the XOR instruction and side effects. -****************************************************************************/ -u8 xor_byte(u8 d, u8 s) -{ - u8 res; /* all operands in native machine order */ - - res = d ^ s; - no_carry_byte_side_eff(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the XOR instruction and side effects. -****************************************************************************/ -u16 xor_word(u16 d, u16 s) -{ - u16 res; /* all operands in native machine order */ - - res = d ^ s; - no_carry_word_side_eff(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the XOR instruction and side effects. -****************************************************************************/ -u32 xor_long(u32 d, u32 s) -{ - u32 res; /* all operands in native machine order */ - - res = d ^ s; - no_carry_long_side_eff(res); - return res; -} - -/**************************************************************************** -REMARKS: -Implements the IMUL instruction and side effects. -****************************************************************************/ -void imul_byte(u8 s) -{ - s16 res = (s16)((s8)M.x86.R_AL * (s8)s); - - M.x86.R_AX = res; - if (((M.x86.R_AL & 0x80) == 0 && M.x86.R_AH == 0x00) || - ((M.x86.R_AL & 0x80) != 0 && M.x86.R_AH == 0xFF)) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } -} - -/**************************************************************************** -REMARKS: -Implements the IMUL instruction and side effects. -****************************************************************************/ -void imul_word(u16 s) -{ - s32 res = (s16)M.x86.R_AX * (s16)s; - - M.x86.R_AX = (u16)res; - M.x86.R_DX = (u16)(res >> 16); - if (((M.x86.R_AX & 0x8000) == 0 && M.x86.R_DX == 0x0000) || - ((M.x86.R_AX & 0x8000) != 0 && M.x86.R_DX == 0xFFFF)) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } -} - -/**************************************************************************** -REMARKS: -Implements the IMUL instruction and side effects. -****************************************************************************/ -void imul_long_direct(u32 *res_lo, u32* res_hi,u32 d, u32 s) -{ -#ifdef __HAS_LONG_LONG__ - s64 res = (s32)d * (s32)s; - - *res_lo = (u32)res; - *res_hi = (u32)(res >> 32); -#else - u32 d_lo,d_hi,d_sign; - u32 s_lo,s_hi,s_sign; - u32 rlo_lo,rlo_hi,rhi_lo; - - if ((d_sign = d & 0x80000000) != 0) - d = -d; - d_lo = d & 0xFFFF; - d_hi = d >> 16; - if ((s_sign = s & 0x80000000) != 0) - s = -s; - s_lo = s & 0xFFFF; - s_hi = s >> 16; - rlo_lo = d_lo * s_lo; - rlo_hi = (d_hi * s_lo + d_lo * s_hi) + (rlo_lo >> 16); - rhi_lo = d_hi * s_hi + (rlo_hi >> 16); - *res_lo = (rlo_hi << 16) | (rlo_lo & 0xFFFF); - *res_hi = rhi_lo; - if (d_sign != s_sign) { - d = ~*res_lo; - s = (((d & 0xFFFF) + 1) >> 16) + (d >> 16); - *res_lo = ~*res_lo+1; - *res_hi = ~*res_hi+(s >> 16); - } -#endif -} - -/**************************************************************************** -REMARKS: -Implements the IMUL instruction and side effects. -****************************************************************************/ -void imul_long(u32 s) -{ - imul_long_direct(&M.x86.R_EAX,&M.x86.R_EDX,M.x86.R_EAX,s); - if (((M.x86.R_EAX & 0x80000000) == 0 && M.x86.R_EDX == 0x00000000) || - ((M.x86.R_EAX & 0x80000000) != 0 && M.x86.R_EDX == 0xFFFFFFFF)) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } -} - -/**************************************************************************** -REMARKS: -Implements the MUL instruction and side effects. -****************************************************************************/ -void mul_byte(u8 s) -{ - u16 res = (u16)(M.x86.R_AL * s); - - M.x86.R_AX = res; - if (M.x86.R_AH == 0) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } -} - -/**************************************************************************** -REMARKS: -Implements the MUL instruction and side effects. -****************************************************************************/ -void mul_word(u16 s) -{ - u32 res = M.x86.R_AX * s; - - M.x86.R_AX = (u16)res; - M.x86.R_DX = (u16)(res >> 16); - if (M.x86.R_DX == 0) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } -} - -/**************************************************************************** -REMARKS: -Implements the MUL instruction and side effects. -****************************************************************************/ -void mul_long(u32 s) -{ -#ifdef __HAS_LONG_LONG__ - u64 res = (u32)M.x86.R_EAX * (u32)s; - - M.x86.R_EAX = (u32)res; - M.x86.R_EDX = (u32)(res >> 32); -#else - u32 a,a_lo,a_hi; - u32 s_lo,s_hi; - u32 rlo_lo,rlo_hi,rhi_lo; - - a = M.x86.R_EAX; - a_lo = a & 0xFFFF; - a_hi = a >> 16; - s_lo = s & 0xFFFF; - s_hi = s >> 16; - rlo_lo = a_lo * s_lo; - rlo_hi = (a_hi * s_lo + a_lo * s_hi) + (rlo_lo >> 16); - rhi_lo = a_hi * s_hi + (rlo_hi >> 16); - M.x86.R_EAX = (rlo_hi << 16) | (rlo_lo & 0xFFFF); - M.x86.R_EDX = rhi_lo; -#endif - if (M.x86.R_EDX == 0) { - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_OF); - } else { - SET_FLAG(F_CF); - SET_FLAG(F_OF); - } -} - -/**************************************************************************** -REMARKS: -Implements the IDIV instruction and side effects. -****************************************************************************/ -void idiv_byte(u8 s) -{ - s32 dvd, div, mod; - - dvd = (s16)M.x86.R_AX; - if (s == 0) { - x86emu_intr_raise(0); - return; - } - div = dvd / (s8)s; - mod = dvd % (s8)s; - if (abs(div) > 0x7f) { - x86emu_intr_raise(0); - return; - } - M.x86.R_AL = (s8) div; - M.x86.R_AH = (s8) mod; -} - -/**************************************************************************** -REMARKS: -Implements the IDIV instruction and side effects. -****************************************************************************/ -void idiv_word(u16 s) -{ - s32 dvd, div, mod; - - dvd = (((s32)M.x86.R_DX) << 16) | M.x86.R_AX; - if (s == 0) { - x86emu_intr_raise(0); - return; - } - div = dvd / (s16)s; - mod = dvd % (s16)s; - if (abs(div) > 0x7fff) { - x86emu_intr_raise(0); - return; - } - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_SF); - CONDITIONAL_SET_FLAG(div == 0, F_ZF); - set_parity_flag(mod); - - M.x86.R_AX = (u16)div; - M.x86.R_DX = (u16)mod; -} - -/**************************************************************************** -REMARKS: -Implements the IDIV instruction and side effects. -****************************************************************************/ -void idiv_long(u32 s) -{ -#ifdef __HAS_LONG_LONG__ - s64 dvd, div, mod; - - dvd = (((s64)M.x86.R_EDX) << 32) | M.x86.R_EAX; - if (s == 0) { - x86emu_intr_raise(0); - return; - } - div = dvd / (s32)s; - mod = dvd % (s32)s; - if (abs(div) > 0x7fffffff) { - x86emu_intr_raise(0); - return; - } -#else - s32 div = 0, mod; - s32 h_dvd = M.x86.R_EDX; - u32 l_dvd = M.x86.R_EAX; - u32 abs_s = s & 0x7FFFFFFF; - u32 abs_h_dvd = h_dvd & 0x7FFFFFFF; - u32 h_s = abs_s >> 1; - u32 l_s = abs_s << 31; - int counter = 31; - int carry; - - if (s == 0) { - x86emu_intr_raise(0); - return; - } - do { - div <<= 1; - carry = (l_dvd >= l_s) ? 0 : 1; - - if (abs_h_dvd < (h_s + carry)) { - h_s >>= 1; - l_s = abs_s << (--counter); - continue; - } else { - abs_h_dvd -= (h_s + carry); - l_dvd = carry ? ((0xFFFFFFFF - l_s) + l_dvd + 1) - : (l_dvd - l_s); - h_s >>= 1; - l_s = abs_s << (--counter); - div |= 1; - continue; - } - - } while (counter > -1); - /* overflow */ - if (abs_h_dvd || (l_dvd > abs_s)) { - x86emu_intr_raise(0); - return; - } - /* sign */ - div |= ((h_dvd & 0x10000000) ^ (s & 0x10000000)); - mod = l_dvd; - -#endif - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_AF); - CLEAR_FLAG(F_SF); - SET_FLAG(F_ZF); - set_parity_flag(mod); - - M.x86.R_EAX = (u32)div; - M.x86.R_EDX = (u32)mod; -} - -/**************************************************************************** -REMARKS: -Implements the DIV instruction and side effects. -****************************************************************************/ -void div_byte(u8 s) -{ - u32 dvd, div, mod; - - dvd = M.x86.R_AX; - if (s == 0) { - x86emu_intr_raise(0); - return; - } - div = dvd / (u8)s; - mod = dvd % (u8)s; - if (abs(div) > 0xff) { - x86emu_intr_raise(0); - return; - } - M.x86.R_AL = (u8)div; - M.x86.R_AH = (u8)mod; -} - -/**************************************************************************** -REMARKS: -Implements the DIV instruction and side effects. -****************************************************************************/ -void div_word(u16 s) -{ - u32 dvd, div, mod; - - dvd = (((u32)M.x86.R_DX) << 16) | M.x86.R_AX; - if (s == 0) { - x86emu_intr_raise(0); - return; - } - div = dvd / (u16)s; - mod = dvd % (u16)s; - if (abs(div) > 0xffff) { - x86emu_intr_raise(0); - return; - } - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_SF); - CONDITIONAL_SET_FLAG(div == 0, F_ZF); - set_parity_flag(mod); - - M.x86.R_AX = (u16)div; - M.x86.R_DX = (u16)mod; -} - -/**************************************************************************** -REMARKS: -Implements the DIV instruction and side effects. -****************************************************************************/ -void div_long(u32 s) -{ -#ifdef __HAS_LONG_LONG__ - u64 dvd, div, mod; - - dvd = (((u64)M.x86.R_EDX) << 32) | M.x86.R_EAX; - if (s == 0) { - x86emu_intr_raise(0); - return; - } - div = dvd / (u32)s; - mod = dvd % (u32)s; - if (abs(div) > 0xffffffff) { - x86emu_intr_raise(0); - return; - } -#else - s32 div = 0, mod; - s32 h_dvd = M.x86.R_EDX; - u32 l_dvd = M.x86.R_EAX; - - u32 h_s = s; - u32 l_s = 0; - int counter = 32; - int carry; - - if (s == 0) { - x86emu_intr_raise(0); - return; - } - do { - div <<= 1; - carry = (l_dvd >= l_s) ? 0 : 1; - - if (h_dvd < (h_s + carry)) { - h_s >>= 1; - l_s = s << (--counter); - continue; - } else { - h_dvd -= (h_s + carry); - l_dvd = carry ? ((0xFFFFFFFF - l_s) + l_dvd + 1) - : (l_dvd - l_s); - h_s >>= 1; - l_s = s << (--counter); - div |= 1; - continue; - } - - } while (counter > -1); - /* overflow */ - if (h_dvd || (l_dvd > s)) { - x86emu_intr_raise(0); - return; - } - mod = l_dvd; -#endif - CLEAR_FLAG(F_CF); - CLEAR_FLAG(F_AF); - CLEAR_FLAG(F_SF); - SET_FLAG(F_ZF); - set_parity_flag(mod); - - M.x86.R_EAX = (u32)div; - M.x86.R_EDX = (u32)mod; -} - -/**************************************************************************** -REMARKS: -Implements the IN string instruction and side effects. -****************************************************************************/ - -static void single_in(int size) -{ - if(size == 1) - store_data_byte_abs(M.x86.R_ES, M.x86.R_DI,(*sys_inb)(M.x86.R_DX)); - else if (size == 2) - store_data_word_abs(M.x86.R_ES, M.x86.R_DI,(*sys_inw)(M.x86.R_DX)); - else - store_data_long_abs(M.x86.R_ES, M.x86.R_DI,(*sys_inl)(M.x86.R_DX)); -} - -void ins(int size) -{ - int inc = size; - - if (ACCESS_FLAG(F_DF)) { - inc = -size; - } - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* dont care whether REPE or REPNE */ - /* in until CX is ZERO. */ - u32 count = ((M.x86.mode & SYSMODE_PREFIX_DATA) ? - M.x86.R_ECX : M.x86.R_CX); - - while (count--) { - single_in(size); - M.x86.R_DI += inc; - } - M.x86.R_CX = 0; - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - M.x86.R_ECX = 0; - } - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } else { - single_in(size); - M.x86.R_DI += inc; - } -} - -/**************************************************************************** -REMARKS: -Implements the OUT string instruction and side effects. -****************************************************************************/ - -static void single_out(int size) -{ - if(size == 1) - (*sys_outb)(M.x86.R_DX,fetch_data_byte_abs(M.x86.R_ES, M.x86.R_SI)); - else if (size == 2) - (*sys_outw)(M.x86.R_DX,fetch_data_word_abs(M.x86.R_ES, M.x86.R_SI)); - else - (*sys_outl)(M.x86.R_DX,fetch_data_long_abs(M.x86.R_ES, M.x86.R_SI)); -} - -void outs(int size) -{ - int inc = size; - - if (ACCESS_FLAG(F_DF)) { - inc = -size; - } - if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { - /* dont care whether REPE or REPNE */ - /* out until CX is ZERO. */ - u32 count = ((M.x86.mode & SYSMODE_PREFIX_DATA) ? - M.x86.R_ECX : M.x86.R_CX); - while (count--) { - single_out(size); - M.x86.R_SI += inc; - } - M.x86.R_CX = 0; - if (M.x86.mode & SYSMODE_PREFIX_DATA) { - M.x86.R_ECX = 0; - } - M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); - } else { - single_out(size); - M.x86.R_SI += inc; - } -} - -/**************************************************************************** -PARAMETERS: -addr - Address to fetch word from - -REMARKS: -Fetches a word from emulator memory using an absolute address. -****************************************************************************/ -u16 mem_access_word(int addr) -{ -DB( if (CHECK_MEM_ACCESS()) - x86emu_check_mem_access(addr);) - return (*sys_rdw)(addr); -} - -/**************************************************************************** -REMARKS: -Pushes a word onto the stack. - -NOTE: Do not inline this, as (*sys_wrX) is already inline! -****************************************************************************/ -void push_word(u16 w) -{ -DB( if (CHECK_SP_ACCESS()) - x86emu_check_sp_access();) - M.x86.R_SP -= 2; - (*sys_wrw)(((u32)M.x86.R_SS << 4) + M.x86.R_SP, w); -} - -/**************************************************************************** -REMARKS: -Pushes a long onto the stack. - -NOTE: Do not inline this, as (*sys_wrX) is already inline! -****************************************************************************/ -void push_long(u32 w) -{ -DB( if (CHECK_SP_ACCESS()) - x86emu_check_sp_access();) - M.x86.R_SP -= 4; - (*sys_wrl)(((u32)M.x86.R_SS << 4) + M.x86.R_SP, w); -} - -/**************************************************************************** -REMARKS: -Pops a word from the stack. - -NOTE: Do not inline this, as (*sys_rdX) is already inline! -****************************************************************************/ -u16 pop_word(void) -{ - u16 res; - -DB( if (CHECK_SP_ACCESS()) - x86emu_check_sp_access();) - res = (*sys_rdw)(((u32)M.x86.R_SS << 4) + M.x86.R_SP); - M.x86.R_SP += 2; - return res; -} - -/**************************************************************************** -REMARKS: -Pops a long from the stack. - -NOTE: Do not inline this, as (*sys_rdX) is already inline! -****************************************************************************/ -u32 pop_long(void) -{ - u32 res; - -DB( if (CHECK_SP_ACCESS()) - x86emu_check_sp_access();) - res = (*sys_rdl)(((u32)M.x86.R_SS << 4) + M.x86.R_SP); - M.x86.R_SP += 4; - return res; -} diff --git a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/sys.c b/qemu/roms/u-boot/drivers/bios_emulator/x86emu/sys.c deleted file mode 100644 index 21f9730be..000000000 --- a/qemu/roms/u-boot/drivers/bios_emulator/x86emu/sys.c +++ /dev/null @@ -1,323 +0,0 @@ -/**************************************************************************** -* -* Realmode X86 Emulator Library -* -* Copyright (C) 1991-2004 SciTech Software, Inc. -* Copyright (C) David Mosberger-Tang -* Copyright (C) 1999 Egbert Eich -* -* ======================================================================== -* -* Permission to use, copy, modify, distribute, and sell this software and -* its documentation for any purpose is hereby granted without fee, -* provided that the above copyright notice appear in all copies and that -* both that copyright notice and this permission notice appear in -* supporting documentation, and that the name of the authors not be used -* in advertising or publicity pertaining to distribution of the software -* without specific, written prior permission. The authors makes no -* representations about the suitability of this software for any purpose. -* It is provided "as is" without express or implied warranty. -* -* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, -* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO -* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR -* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF -* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR -* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR -* PERFORMANCE OF THIS SOFTWARE. -* -* ======================================================================== -* -* Language: ANSI C -* Environment: Any -* Developer: Kendall Bennett -* -* Description: This file includes subroutines which are related to -* programmed I/O and memory access. Included in this module -* are default functions that do nothing. For real uses these -* functions will have to be overriden by the user library. -* -****************************************************************************/ - -#include <common.h> -#include "x86emu/x86emui.h" - -/*------------------------- Global Variables ------------------------------*/ - -X86EMU_sysEnv _X86EMU_env; /* Global emulator machine state */ -X86EMU_intrFuncs _X86EMU_intrTab[256]; - -int debug_intr; - -/*----------------------------- Implementation ----------------------------*/ - -/**************************************************************************** -PARAMETERS: -addr - Emulator memory address to read - -RETURNS: -Byte value read from emulator memory. - -REMARKS: -Reads a byte value from the emulator memory. -****************************************************************************/ -u8 X86API rdb(u32 addr) -{ - return 0; -} - -/**************************************************************************** -PARAMETERS: -addr - Emulator memory address to read - -RETURNS: -Word value read from emulator memory. - -REMARKS: -Reads a word value from the emulator memory. -****************************************************************************/ -u16 X86API rdw(u32 addr) -{ - return 0; -} - -/**************************************************************************** -PARAMETERS: -addr - Emulator memory address to read - -RETURNS: -Long value read from emulator memory. -REMARKS: -Reads a long value from the emulator memory. -****************************************************************************/ -u32 X86API rdl(u32 addr) -{ - return 0; -} - -/**************************************************************************** -PARAMETERS: -addr - Emulator memory address to read -val - Value to store - -REMARKS: -Writes a byte value to emulator memory. -****************************************************************************/ -void X86API wrb(u32 addr, u8 val) -{ -} - -/**************************************************************************** -PARAMETERS: -addr - Emulator memory address to read -val - Value to store - -REMARKS: -Writes a word value to emulator memory. -****************************************************************************/ -void X86API wrw(u32 addr, u16 val) -{ -} - -/**************************************************************************** -PARAMETERS: -addr - Emulator memory address to read -val - Value to store - -REMARKS: -Writes a long value to emulator memory. -****************************************************************************/ -void X86API wrl(u32 addr, u32 val) -{ -} - -/**************************************************************************** -PARAMETERS: -addr - PIO address to read -RETURN: -0 -REMARKS: -Default PIO byte read function. Doesn't perform real inb. -****************************************************************************/ -static u8 X86API p_inb(X86EMU_pioAddr addr) -{ - DB(if (DEBUG_IO_TRACE()) - printk("inb %#04x \n", addr);) - return 0; -} - -/**************************************************************************** -PARAMETERS: -addr - PIO address to read -RETURN: -0 -REMARKS: -Default PIO word read function. Doesn't perform real inw. -****************************************************************************/ -static u16 X86API p_inw(X86EMU_pioAddr addr) -{ - DB(if (DEBUG_IO_TRACE()) - printk("inw %#04x \n", addr);) - return 0; -} - -/**************************************************************************** -PARAMETERS: -addr - PIO address to read -RETURN: -0 -REMARKS: -Default PIO long read function. Doesn't perform real inl. -****************************************************************************/ -static u32 X86API p_inl(X86EMU_pioAddr addr) -{ - DB(if (DEBUG_IO_TRACE()) - printk("inl %#04x \n", addr);) - return 0; -} - -/**************************************************************************** -PARAMETERS: -addr - PIO address to write -val - Value to store -REMARKS: -Default PIO byte write function. Doesn't perform real outb. -****************************************************************************/ -static void X86API p_outb(X86EMU_pioAddr addr, u8 val) -{ - DB(if (DEBUG_IO_TRACE()) - printk("outb %#02x -> %#04x \n", val, addr);) - return; -} - -/**************************************************************************** -PARAMETERS: -addr - PIO address to write -val - Value to store -REMARKS: -Default PIO word write function. Doesn't perform real outw. -****************************************************************************/ -static void X86API p_outw(X86EMU_pioAddr addr, u16 val) -{ - DB(if (DEBUG_IO_TRACE()) - printk("outw %#04x -> %#04x \n", val, addr);) - return; -} - -/**************************************************************************** -PARAMETERS: -addr - PIO address to write -val - Value to store -REMARKS: -Default PIO ;ong write function. Doesn't perform real outl. -****************************************************************************/ -static void X86API p_outl(X86EMU_pioAddr addr, u32 val) -{ - DB(if (DEBUG_IO_TRACE()) - printk("outl %#08x -> %#04x \n", val, addr);) - return; -} - -/*------------------------- Global Variables ------------------------------*/ - -u8(X86APIP sys_rdb) (u32 addr) = rdb; -u16(X86APIP sys_rdw) (u32 addr) = rdw; -u32(X86APIP sys_rdl) (u32 addr) = rdl; -void (X86APIP sys_wrb) (u32 addr, u8 val) = wrb; -void (X86APIP sys_wrw) (u32 addr, u16 val) = wrw; -void (X86APIP sys_wrl) (u32 addr, u32 val) = wrl; -u8(X86APIP sys_inb) (X86EMU_pioAddr addr) = p_inb; -u16(X86APIP sys_inw) (X86EMU_pioAddr addr) = p_inw; -u32(X86APIP sys_inl) (X86EMU_pioAddr addr) = p_inl; -void (X86APIP sys_outb) (X86EMU_pioAddr addr, u8 val) = p_outb; -void (X86APIP sys_outw) (X86EMU_pioAddr addr, u16 val) = p_outw; -void (X86APIP sys_outl) (X86EMU_pioAddr addr, u32 val) = p_outl; - -/*----------------------------- Setup -------------------------------------*/ - -/**************************************************************************** -PARAMETERS: -funcs - New memory function pointers to make active - -REMARKS: -This function is used to set the pointers to functions which access -memory space, allowing the user application to override these functions -and hook them out as necessary for their application. -****************************************************************************/ -void X86EMU_setupMemFuncs(X86EMU_memFuncs * funcs) -{ - sys_rdb = funcs->rdb; - sys_rdw = funcs->rdw; - sys_rdl = funcs->rdl; - sys_wrb = funcs->wrb; - sys_wrw = funcs->wrw; - sys_wrl = funcs->wrl; -} - -/**************************************************************************** -PARAMETERS: -funcs - New programmed I/O function pointers to make active - -REMARKS: -This function is used to set the pointers to functions which access -I/O space, allowing the user application to override these functions -and hook them out as necessary for their application. -****************************************************************************/ -void X86EMU_setupPioFuncs(X86EMU_pioFuncs * funcs) -{ - sys_inb = funcs->inb; - sys_inw = funcs->inw; - sys_inl = funcs->inl; - sys_outb = funcs->outb; - sys_outw = funcs->outw; - sys_outl = funcs->outl; -} - -/**************************************************************************** -PARAMETERS: -funcs - New interrupt vector table to make active - -REMARKS: -This function is used to set the pointers to functions which handle -interrupt processing in the emulator, allowing the user application to -hook interrupts as necessary for their application. Any interrupts that -are not hooked by the user application, and reflected and handled internally -in the emulator via the interrupt vector table. This allows the application -to get control when the code being emulated executes specific software -interrupts. -****************************************************************************/ -void X86EMU_setupIntrFuncs(X86EMU_intrFuncs funcs[]) -{ - int i; - - for (i = 0; i < 256; i++) - _X86EMU_intrTab[i] = NULL; - if (funcs) { - for (i = 0; i < 256; i++) - _X86EMU_intrTab[i] = funcs[i]; - } -} - -/**************************************************************************** -PARAMETERS: -int - New software interrupt to prepare for - -REMARKS: -This function is used to set up the emulator state to exceute a software -interrupt. This can be used by the user application code to allow an -interrupt to be hooked, examined and then reflected back to the emulator -so that the code in the emulator will continue processing the software -interrupt as per normal. This essentially allows system code to actively -hook and handle certain software interrupts as necessary. -****************************************************************************/ -void X86EMU_prepareForInt(int num) -{ - push_word((u16) M.x86.R_FLG); - CLEAR_FLAG(F_IF); - CLEAR_FLAG(F_TF); - push_word(M.x86.R_CS); - M.x86.R_CS = mem_access_word(num * 4 + 2); - push_word(M.x86.R_IP); - M.x86.R_IP = mem_access_word(num * 4); - M.x86.intr = 0; -} |