diff options
Diffstat (limited to 'qemu/tcg/i386/tcg-target.inc.c')
| -rw-r--r-- | qemu/tcg/i386/tcg-target.inc.c | 2463 |
1 files changed, 0 insertions, 2463 deletions
diff --git a/qemu/tcg/i386/tcg-target.inc.c b/qemu/tcg/i386/tcg-target.inc.c deleted file mode 100644 index 007407c3f..000000000 --- a/qemu/tcg/i386/tcg-target.inc.c +++ /dev/null @@ -1,2463 +0,0 @@ -/* - * Tiny Code Generator for QEMU - * - * Copyright (c) 2008 Fabrice Bellard - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "tcg-be-ldst.h" - -#ifdef CONFIG_DEBUG_TCG -static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { -#if TCG_TARGET_REG_BITS == 64 - "%rax", "%rcx", "%rdx", "%rbx", "%rsp", "%rbp", "%rsi", "%rdi", - "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", -#else - "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi", -#endif -}; -#endif - -static const int tcg_target_reg_alloc_order[] = { -#if TCG_TARGET_REG_BITS == 64 - TCG_REG_RBP, - TCG_REG_RBX, - TCG_REG_R12, - TCG_REG_R13, - TCG_REG_R14, - TCG_REG_R15, - TCG_REG_R10, - TCG_REG_R11, - TCG_REG_R9, - TCG_REG_R8, - TCG_REG_RCX, - TCG_REG_RDX, - TCG_REG_RSI, - TCG_REG_RDI, - TCG_REG_RAX, -#else - TCG_REG_EBX, - TCG_REG_ESI, - TCG_REG_EDI, - TCG_REG_EBP, - TCG_REG_ECX, - TCG_REG_EDX, - TCG_REG_EAX, -#endif -}; - -static const int tcg_target_call_iarg_regs[] = { -#if TCG_TARGET_REG_BITS == 64 -#if defined(_WIN64) - TCG_REG_RCX, - TCG_REG_RDX, -#else - TCG_REG_RDI, - TCG_REG_RSI, - TCG_REG_RDX, - TCG_REG_RCX, -#endif - TCG_REG_R8, - TCG_REG_R9, -#else - /* 32 bit mode uses stack based calling convention (GCC default). */ -#endif -}; - -static const int tcg_target_call_oarg_regs[] = { - TCG_REG_EAX, -#if TCG_TARGET_REG_BITS == 32 - TCG_REG_EDX -#endif -}; - -/* Constants we accept. */ -#define TCG_CT_CONST_S32 0x100 -#define TCG_CT_CONST_U32 0x200 -#define TCG_CT_CONST_I32 0x400 - -/* Registers used with L constraint, which are the first argument - registers on x86_64, and two random call clobbered registers on - i386. */ -#if TCG_TARGET_REG_BITS == 64 -# define TCG_REG_L0 tcg_target_call_iarg_regs[0] -# define TCG_REG_L1 tcg_target_call_iarg_regs[1] -#else -# define TCG_REG_L0 TCG_REG_EAX -# define TCG_REG_L1 TCG_REG_EDX -#endif - -/* The host compiler should supply <cpuid.h> to enable runtime features - detection, as we're not going to go so far as our own inline assembly. - If not available, default values will be assumed. */ -#if defined(CONFIG_CPUID_H) -#include <cpuid.h> -#endif - -/* For 32-bit, we are going to attempt to determine at runtime whether cmov - is available. */ -#if TCG_TARGET_REG_BITS == 64 -# define have_cmov 1 -#elif defined(CONFIG_CPUID_H) && defined(bit_CMOV) -static bool have_cmov; -#else -# define have_cmov 0 -#endif - -/* If bit_MOVBE is defined in cpuid.h (added in GCC version 4.6), we are - going to attempt to determine at runtime whether movbe is available. */ -#if defined(CONFIG_CPUID_H) && defined(bit_MOVBE) -static bool have_movbe; -#else -# define have_movbe 0 -#endif - -/* We need this symbol in tcg-target.h, and we can't properly conditionalize - it there. Therefore we always define the variable. */ -bool have_bmi1; - -#if defined(CONFIG_CPUID_H) && defined(bit_BMI2) -static bool have_bmi2; -#else -# define have_bmi2 0 -#endif - -static tcg_insn_unit *tb_ret_addr; - -static void patch_reloc(tcg_insn_unit *code_ptr, int type, - intptr_t value, intptr_t addend) -{ - value += addend; - switch(type) { - case R_386_PC32: - value -= (uintptr_t)code_ptr; - if (value != (int32_t)value) { - tcg_abort(); - } - tcg_patch32(code_ptr, value); - break; - case R_386_PC8: - value -= (uintptr_t)code_ptr; - if (value != (int8_t)value) { - tcg_abort(); - } - tcg_patch8(code_ptr, value); - break; - default: - tcg_abort(); - } -} - -/* parse target specific constraints */ -static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str) -{ - const char *ct_str; - - ct_str = *pct_str; - switch(ct_str[0]) { - case 'a': - ct->ct |= TCG_CT_REG; - tcg_regset_set_reg(ct->u.regs, TCG_REG_EAX); - break; - case 'b': - ct->ct |= TCG_CT_REG; - tcg_regset_set_reg(ct->u.regs, TCG_REG_EBX); - break; - case 'c': - case_c: - ct->ct |= TCG_CT_REG; - tcg_regset_set_reg(ct->u.regs, TCG_REG_ECX); - break; - case 'd': - ct->ct |= TCG_CT_REG; - tcg_regset_set_reg(ct->u.regs, TCG_REG_EDX); - break; - case 'S': - ct->ct |= TCG_CT_REG; - tcg_regset_set_reg(ct->u.regs, TCG_REG_ESI); - break; - case 'D': - ct->ct |= TCG_CT_REG; - tcg_regset_set_reg(ct->u.regs, TCG_REG_EDI); - break; - case 'q': - ct->ct |= TCG_CT_REG; - if (TCG_TARGET_REG_BITS == 64) { - tcg_regset_set32(ct->u.regs, 0, 0xffff); - } else { - tcg_regset_set32(ct->u.regs, 0, 0xf); - } - break; - case 'Q': - ct->ct |= TCG_CT_REG; - tcg_regset_set32(ct->u.regs, 0, 0xf); - break; - case 'r': - case_r: - ct->ct |= TCG_CT_REG; - if (TCG_TARGET_REG_BITS == 64) { - tcg_regset_set32(ct->u.regs, 0, 0xffff); - } else { - tcg_regset_set32(ct->u.regs, 0, 0xff); - } - break; - case 'C': - /* With SHRX et al, we need not use ECX as shift count register. */ - if (have_bmi2) { - goto case_r; - } else { - goto case_c; - } - - /* qemu_ld/st address constraint */ - case 'L': - ct->ct |= TCG_CT_REG; - if (TCG_TARGET_REG_BITS == 64) { - tcg_regset_set32(ct->u.regs, 0, 0xffff); - } else { - tcg_regset_set32(ct->u.regs, 0, 0xff); - } - tcg_regset_reset_reg(ct->u.regs, TCG_REG_L0); - tcg_regset_reset_reg(ct->u.regs, TCG_REG_L1); - break; - - case 'e': - ct->ct |= TCG_CT_CONST_S32; - break; - case 'Z': - ct->ct |= TCG_CT_CONST_U32; - break; - case 'I': - ct->ct |= TCG_CT_CONST_I32; - break; - - default: - return -1; - } - ct_str++; - *pct_str = ct_str; - return 0; -} - -/* test if a constant matches the constraint */ -static inline int tcg_target_const_match(tcg_target_long val, TCGType type, - const TCGArgConstraint *arg_ct) -{ - int ct = arg_ct->ct; - if (ct & TCG_CT_CONST) { - return 1; - } - if ((ct & TCG_CT_CONST_S32) && val == (int32_t)val) { - return 1; - } - if ((ct & TCG_CT_CONST_U32) && val == (uint32_t)val) { - return 1; - } - if ((ct & TCG_CT_CONST_I32) && ~val == (int32_t)~val) { - return 1; - } - return 0; -} - -#if TCG_TARGET_REG_BITS == 64 -# define LOWREGMASK(x) ((x) & 7) -#else -# define LOWREGMASK(x) (x) -#endif - -#define P_EXT 0x100 /* 0x0f opcode prefix */ -#define P_EXT38 0x200 /* 0x0f 0x38 opcode prefix */ -#define P_DATA16 0x400 /* 0x66 opcode prefix */ -#if TCG_TARGET_REG_BITS == 64 -# define P_ADDR32 0x800 /* 0x67 opcode prefix */ -# define P_REXW 0x1000 /* Set REX.W = 1 */ -# define P_REXB_R 0x2000 /* REG field as byte register */ -# define P_REXB_RM 0x4000 /* R/M field as byte register */ -# define P_GS 0x8000 /* gs segment override */ -#else -# define P_ADDR32 0 -# define P_REXW 0 -# define P_REXB_R 0 -# define P_REXB_RM 0 -# define P_GS 0 -#endif -#define P_SIMDF3 0x10000 /* 0xf3 opcode prefix */ -#define P_SIMDF2 0x20000 /* 0xf2 opcode prefix */ - -#define OPC_ARITH_EvIz (0x81) -#define OPC_ARITH_EvIb (0x83) -#define OPC_ARITH_GvEv (0x03) /* ... plus (ARITH_FOO << 3) */ -#define OPC_ANDN (0xf2 | P_EXT38) -#define OPC_ADD_GvEv (OPC_ARITH_GvEv | (ARITH_ADD << 3)) -#define OPC_BSWAP (0xc8 | P_EXT) -#define OPC_CALL_Jz (0xe8) -#define OPC_CMOVCC (0x40 | P_EXT) /* ... plus condition code */ -#define OPC_CMP_GvEv (OPC_ARITH_GvEv | (ARITH_CMP << 3)) -#define OPC_DEC_r32 (0x48) -#define OPC_IMUL_GvEv (0xaf | P_EXT) -#define OPC_IMUL_GvEvIb (0x6b) -#define OPC_IMUL_GvEvIz (0x69) -#define OPC_INC_r32 (0x40) -#define OPC_JCC_long (0x80 | P_EXT) /* ... plus condition code */ -#define OPC_JCC_short (0x70) /* ... plus condition code */ -#define OPC_JMP_long (0xe9) -#define OPC_JMP_short (0xeb) -#define OPC_LEA (0x8d) -#define OPC_MOVB_EvGv (0x88) /* stores, more or less */ -#define OPC_MOVL_EvGv (0x89) /* stores, more or less */ -#define OPC_MOVL_GvEv (0x8b) /* loads, more or less */ -#define OPC_MOVB_EvIz (0xc6) -#define OPC_MOVL_EvIz (0xc7) -#define OPC_MOVL_Iv (0xb8) -#define OPC_MOVBE_GyMy (0xf0 | P_EXT38) -#define OPC_MOVBE_MyGy (0xf1 | P_EXT38) -#define OPC_MOVSBL (0xbe | P_EXT) -#define OPC_MOVSWL (0xbf | P_EXT) -#define OPC_MOVSLQ (0x63 | P_REXW) -#define OPC_MOVZBL (0xb6 | P_EXT) -#define OPC_MOVZWL (0xb7 | P_EXT) -#define OPC_POP_r32 (0x58) -#define OPC_PUSH_r32 (0x50) -#define OPC_PUSH_Iv (0x68) -#define OPC_PUSH_Ib (0x6a) -#define OPC_RET (0xc3) -#define OPC_SETCC (0x90 | P_EXT | P_REXB_RM) /* ... plus cc */ -#define OPC_SHIFT_1 (0xd1) -#define OPC_SHIFT_Ib (0xc1) -#define OPC_SHIFT_cl (0xd3) -#define OPC_SARX (0xf7 | P_EXT38 | P_SIMDF3) -#define OPC_SHLX (0xf7 | P_EXT38 | P_DATA16) -#define OPC_SHRX (0xf7 | P_EXT38 | P_SIMDF2) -#define OPC_TESTL (0x85) -#define OPC_XCHG_ax_r32 (0x90) - -#define OPC_GRP3_Ev (0xf7) -#define OPC_GRP5 (0xff) - -/* Group 1 opcode extensions for 0x80-0x83. - These are also used as modifiers for OPC_ARITH. */ -#define ARITH_ADD 0 -#define ARITH_OR 1 -#define ARITH_ADC 2 -#define ARITH_SBB 3 -#define ARITH_AND 4 -#define ARITH_SUB 5 -#define ARITH_XOR 6 -#define ARITH_CMP 7 - -/* Group 2 opcode extensions for 0xc0, 0xc1, 0xd0-0xd3. */ -#define SHIFT_ROL 0 -#define SHIFT_ROR 1 -#define SHIFT_SHL 4 -#define SHIFT_SHR 5 -#define SHIFT_SAR 7 - -/* Group 3 opcode extensions for 0xf6, 0xf7. To be used with OPC_GRP3. */ -#define EXT3_NOT 2 -#define EXT3_NEG 3 -#define EXT3_MUL 4 -#define EXT3_IMUL 5 -#define EXT3_DIV 6 -#define EXT3_IDIV 7 - -/* Group 5 opcode extensions for 0xff. To be used with OPC_GRP5. */ -#define EXT5_INC_Ev 0 -#define EXT5_DEC_Ev 1 -#define EXT5_CALLN_Ev 2 -#define EXT5_JMPN_Ev 4 - -/* Condition codes to be added to OPC_JCC_{long,short}. */ -#define JCC_JMP (-1) -#define JCC_JO 0x0 -#define JCC_JNO 0x1 -#define JCC_JB 0x2 -#define JCC_JAE 0x3 -#define JCC_JE 0x4 -#define JCC_JNE 0x5 -#define JCC_JBE 0x6 -#define JCC_JA 0x7 -#define JCC_JS 0x8 -#define JCC_JNS 0x9 -#define JCC_JP 0xa -#define JCC_JNP 0xb -#define JCC_JL 0xc -#define JCC_JGE 0xd -#define JCC_JLE 0xe -#define JCC_JG 0xf - -static const uint8_t tcg_cond_to_jcc[] = { - [TCG_COND_EQ] = JCC_JE, - [TCG_COND_NE] = JCC_JNE, - [TCG_COND_LT] = JCC_JL, - [TCG_COND_GE] = JCC_JGE, - [TCG_COND_LE] = JCC_JLE, - [TCG_COND_GT] = JCC_JG, - [TCG_COND_LTU] = JCC_JB, - [TCG_COND_GEU] = JCC_JAE, - [TCG_COND_LEU] = JCC_JBE, - [TCG_COND_GTU] = JCC_JA, -}; - -#if TCG_TARGET_REG_BITS == 64 -static void tcg_out_opc(TCGContext *s, int opc, int r, int rm, int x) -{ - int rex; - - if (opc & P_GS) { - tcg_out8(s, 0x65); - } - if (opc & P_DATA16) { - /* We should never be asking for both 16 and 64-bit operation. */ - tcg_debug_assert((opc & P_REXW) == 0); - tcg_out8(s, 0x66); - } - if (opc & P_ADDR32) { - tcg_out8(s, 0x67); - } - - rex = 0; - rex |= (opc & P_REXW) ? 0x8 : 0x0; /* REX.W */ - rex |= (r & 8) >> 1; /* REX.R */ - rex |= (x & 8) >> 2; /* REX.X */ - rex |= (rm & 8) >> 3; /* REX.B */ - - /* P_REXB_{R,RM} indicates that the given register is the low byte. - For %[abcd]l we need no REX prefix, but for %{si,di,bp,sp}l we do, - as otherwise the encoding indicates %[abcd]h. Note that the values - that are ORed in merely indicate that the REX byte must be present; - those bits get discarded in output. */ - rex |= opc & (r >= 4 ? P_REXB_R : 0); - rex |= opc & (rm >= 4 ? P_REXB_RM : 0); - - if (rex) { - tcg_out8(s, (uint8_t)(rex | 0x40)); - } - - if (opc & (P_EXT | P_EXT38)) { - tcg_out8(s, 0x0f); - if (opc & P_EXT38) { - tcg_out8(s, 0x38); - } - } - - tcg_out8(s, opc); -} -#else -static void tcg_out_opc(TCGContext *s, int opc) -{ - if (opc & P_DATA16) { - tcg_out8(s, 0x66); - } - if (opc & (P_EXT | P_EXT38)) { - tcg_out8(s, 0x0f); - if (opc & P_EXT38) { - tcg_out8(s, 0x38); - } - } - tcg_out8(s, opc); -} -/* Discard the register arguments to tcg_out_opc early, so as not to penalize - the 32-bit compilation paths. This method works with all versions of gcc, - whereas relying on optimization may not be able to exclude them. */ -#define tcg_out_opc(s, opc, r, rm, x) (tcg_out_opc)(s, opc) -#endif - -static void tcg_out_modrm(TCGContext *s, int opc, int r, int rm) -{ - tcg_out_opc(s, opc, r, rm, 0); - tcg_out8(s, 0xc0 | (LOWREGMASK(r) << 3) | LOWREGMASK(rm)); -} - -static void tcg_out_vex_modrm(TCGContext *s, int opc, int r, int v, int rm) -{ - int tmp; - - if ((opc & (P_REXW | P_EXT | P_EXT38)) || (rm & 8)) { - /* Three byte VEX prefix. */ - tcg_out8(s, 0xc4); - - /* VEX.m-mmmm */ - if (opc & P_EXT38) { - tmp = 2; - } else if (opc & P_EXT) { - tmp = 1; - } else { - tcg_abort(); - } - tmp |= 0x40; /* VEX.X */ - tmp |= (r & 8 ? 0 : 0x80); /* VEX.R */ - tmp |= (rm & 8 ? 0 : 0x20); /* VEX.B */ - tcg_out8(s, tmp); - - tmp = (opc & P_REXW ? 0x80 : 0); /* VEX.W */ - } else { - /* Two byte VEX prefix. */ - tcg_out8(s, 0xc5); - - tmp = (r & 8 ? 0 : 0x80); /* VEX.R */ - } - /* VEX.pp */ - if (opc & P_DATA16) { - tmp |= 1; /* 0x66 */ - } else if (opc & P_SIMDF3) { - tmp |= 2; /* 0xf3 */ - } else if (opc & P_SIMDF2) { - tmp |= 3; /* 0xf2 */ - } - tmp |= (~v & 15) << 3; /* VEX.vvvv */ - tcg_out8(s, tmp); - tcg_out8(s, opc); - tcg_out8(s, 0xc0 | (LOWREGMASK(r) << 3) | LOWREGMASK(rm)); -} - -/* Output an opcode with a full "rm + (index<<shift) + offset" address mode. - We handle either RM and INDEX missing with a negative value. In 64-bit - mode for absolute addresses, ~RM is the size of the immediate operand - that will follow the instruction. */ - -static void tcg_out_modrm_sib_offset(TCGContext *s, int opc, int r, int rm, - int index, int shift, intptr_t offset) -{ - int mod, len; - - if (index < 0 && rm < 0) { - if (TCG_TARGET_REG_BITS == 64) { - /* Try for a rip-relative addressing mode. This has replaced - the 32-bit-mode absolute addressing encoding. */ - intptr_t pc = (intptr_t)s->code_ptr + 5 + ~rm; - intptr_t disp = offset - pc; - if (disp == (int32_t)disp) { - tcg_out_opc(s, opc, r, 0, 0); - tcg_out8(s, (LOWREGMASK(r) << 3) | 5); - tcg_out32(s, disp); - return; - } - - /* Try for an absolute address encoding. This requires the - use of the MODRM+SIB encoding and is therefore larger than - rip-relative addressing. */ - if (offset == (int32_t)offset) { - tcg_out_opc(s, opc, r, 0, 0); - tcg_out8(s, (LOWREGMASK(r) << 3) | 4); - tcg_out8(s, (4 << 3) | 5); - tcg_out32(s, offset); - return; - } - - /* ??? The memory isn't directly addressable. */ - tcg_abort(); - } else { - /* Absolute address. */ - tcg_out_opc(s, opc, r, 0, 0); - tcg_out8(s, (r << 3) | 5); - tcg_out32(s, offset); - return; - } - } - - /* Find the length of the immediate addend. Note that the encoding - that would be used for (%ebp) indicates absolute addressing. */ - if (rm < 0) { - mod = 0, len = 4, rm = 5; - } else if (offset == 0 && LOWREGMASK(rm) != TCG_REG_EBP) { - mod = 0, len = 0; - } else if (offset == (int8_t)offset) { - mod = 0x40, len = 1; - } else { - mod = 0x80, len = 4; - } - - /* Use a single byte MODRM format if possible. Note that the encoding - that would be used for %esp is the escape to the two byte form. */ - if (index < 0 && LOWREGMASK(rm) != TCG_REG_ESP) { - /* Single byte MODRM format. */ - tcg_out_opc(s, opc, r, rm, 0); - tcg_out8(s, mod | (LOWREGMASK(r) << 3) | LOWREGMASK(rm)); - } else { - /* Two byte MODRM+SIB format. */ - - /* Note that the encoding that would place %esp into the index - field indicates no index register. In 64-bit mode, the REX.X - bit counts, so %r12 can be used as the index. */ - if (index < 0) { - index = 4; - } else { - tcg_debug_assert(index != TCG_REG_ESP); - } - - tcg_out_opc(s, opc, r, rm, index); - tcg_out8(s, mod | (LOWREGMASK(r) << 3) | 4); - tcg_out8(s, (shift << 6) | (LOWREGMASK(index) << 3) | LOWREGMASK(rm)); - } - - if (len == 1) { - tcg_out8(s, offset); - } else if (len == 4) { - tcg_out32(s, offset); - } -} - -/* A simplification of the above with no index or shift. */ -static inline void tcg_out_modrm_offset(TCGContext *s, int opc, int r, - int rm, intptr_t offset) -{ - tcg_out_modrm_sib_offset(s, opc, r, rm, -1, 0, offset); -} - -/* Generate dest op= src. Uses the same ARITH_* codes as tgen_arithi. */ -static inline void tgen_arithr(TCGContext *s, int subop, int dest, int src) -{ - /* Propagate an opcode prefix, such as P_REXW. */ - int ext = subop & ~0x7; - subop &= 0x7; - - tcg_out_modrm(s, OPC_ARITH_GvEv + (subop << 3) + ext, dest, src); -} - -static inline void tcg_out_mov(TCGContext *s, TCGType type, - TCGReg ret, TCGReg arg) -{ - if (arg != ret) { - int opc = OPC_MOVL_GvEv + (type == TCG_TYPE_I64 ? P_REXW : 0); - tcg_out_modrm(s, opc, ret, arg); - } -} - -static void tcg_out_movi(TCGContext *s, TCGType type, - TCGReg ret, tcg_target_long arg) -{ - tcg_target_long diff; - - if (arg == 0) { - tgen_arithr(s, ARITH_XOR, ret, ret); - return; - } - if (arg == (uint32_t)arg || type == TCG_TYPE_I32) { - tcg_out_opc(s, OPC_MOVL_Iv + LOWREGMASK(ret), 0, ret, 0); - tcg_out32(s, arg); - return; - } - if (arg == (int32_t)arg) { - tcg_out_modrm(s, OPC_MOVL_EvIz + P_REXW, 0, ret); - tcg_out32(s, arg); - return; - } - - /* Try a 7 byte pc-relative lea before the 10 byte movq. */ - diff = arg - ((uintptr_t)s->code_ptr + 7); - if (diff == (int32_t)diff) { - tcg_out_opc(s, OPC_LEA | P_REXW, ret, 0, 0); - tcg_out8(s, (LOWREGMASK(ret) << 3) | 5); - tcg_out32(s, diff); - return; - } - - tcg_out_opc(s, OPC_MOVL_Iv + P_REXW + LOWREGMASK(ret), 0, ret, 0); - tcg_out64(s, arg); -} - -static inline void tcg_out_pushi(TCGContext *s, tcg_target_long val) -{ - if (val == (int8_t)val) { - tcg_out_opc(s, OPC_PUSH_Ib, 0, 0, 0); - tcg_out8(s, val); - } else if (val == (int32_t)val) { - tcg_out_opc(s, OPC_PUSH_Iv, 0, 0, 0); - tcg_out32(s, val); - } else { - tcg_abort(); - } -} - -static inline void tcg_out_push(TCGContext *s, int reg) -{ - tcg_out_opc(s, OPC_PUSH_r32 + LOWREGMASK(reg), 0, reg, 0); -} - -static inline void tcg_out_pop(TCGContext *s, int reg) -{ - tcg_out_opc(s, OPC_POP_r32 + LOWREGMASK(reg), 0, reg, 0); -} - -static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg ret, - TCGReg arg1, intptr_t arg2) -{ - int opc = OPC_MOVL_GvEv + (type == TCG_TYPE_I64 ? P_REXW : 0); - tcg_out_modrm_offset(s, opc, ret, arg1, arg2); -} - -static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, - TCGReg arg1, intptr_t arg2) -{ - int opc = OPC_MOVL_EvGv + (type == TCG_TYPE_I64 ? P_REXW : 0); - tcg_out_modrm_offset(s, opc, arg, arg1, arg2); -} - -static inline void tcg_out_sti(TCGContext *s, TCGType type, TCGReg base, - tcg_target_long ofs, tcg_target_long val) -{ - int opc = OPC_MOVL_EvIz + (type == TCG_TYPE_I64 ? P_REXW : 0); - tcg_out_modrm_offset(s, opc, 0, base, ofs); - tcg_out32(s, val); -} - -static void tcg_out_shifti(TCGContext *s, int subopc, int reg, int count) -{ - /* Propagate an opcode prefix, such as P_DATA16. */ - int ext = subopc & ~0x7; - subopc &= 0x7; - - if (count == 1) { - tcg_out_modrm(s, OPC_SHIFT_1 + ext, subopc, reg); - } else { - tcg_out_modrm(s, OPC_SHIFT_Ib + ext, subopc, reg); - tcg_out8(s, count); - } -} - -static inline void tcg_out_bswap32(TCGContext *s, int reg) -{ - tcg_out_opc(s, OPC_BSWAP + LOWREGMASK(reg), 0, reg, 0); -} - -static inline void tcg_out_rolw_8(TCGContext *s, int reg) -{ - tcg_out_shifti(s, SHIFT_ROL + P_DATA16, reg, 8); -} - -static inline void tcg_out_ext8u(TCGContext *s, int dest, int src) -{ - /* movzbl */ - tcg_debug_assert(src < 4 || TCG_TARGET_REG_BITS == 64); - tcg_out_modrm(s, OPC_MOVZBL + P_REXB_RM, dest, src); -} - -static void tcg_out_ext8s(TCGContext *s, int dest, int src, int rexw) -{ - /* movsbl */ - tcg_debug_assert(src < 4 || TCG_TARGET_REG_BITS == 64); - tcg_out_modrm(s, OPC_MOVSBL + P_REXB_RM + rexw, dest, src); -} - -static inline void tcg_out_ext16u(TCGContext *s, int dest, int src) -{ - /* movzwl */ - tcg_out_modrm(s, OPC_MOVZWL, dest, src); -} - -static inline void tcg_out_ext16s(TCGContext *s, int dest, int src, int rexw) -{ - /* movsw[lq] */ - tcg_out_modrm(s, OPC_MOVSWL + rexw, dest, src); -} - -static inline void tcg_out_ext32u(TCGContext *s, int dest, int src) -{ - /* 32-bit mov zero extends. */ - tcg_out_modrm(s, OPC_MOVL_GvEv, dest, src); -} - -static inline void tcg_out_ext32s(TCGContext *s, int dest, int src) -{ - tcg_out_modrm(s, OPC_MOVSLQ, dest, src); -} - -static inline void tcg_out_bswap64(TCGContext *s, int reg) -{ - tcg_out_opc(s, OPC_BSWAP + P_REXW + LOWREGMASK(reg), 0, reg, 0); -} - -static void tgen_arithi(TCGContext *s, int c, int r0, - tcg_target_long val, int cf) -{ - int rexw = 0; - - if (TCG_TARGET_REG_BITS == 64) { - rexw = c & -8; - c &= 7; - } - - /* ??? While INC is 2 bytes shorter than ADDL $1, they also induce - partial flags update stalls on Pentium4 and are not recommended - by current Intel optimization manuals. */ - if (!cf && (c == ARITH_ADD || c == ARITH_SUB) && (val == 1 || val == -1)) { - int is_inc = (c == ARITH_ADD) ^ (val < 0); - if (TCG_TARGET_REG_BITS == 64) { - /* The single-byte increment encodings are re-tasked as the - REX prefixes. Use the MODRM encoding. */ - tcg_out_modrm(s, OPC_GRP5 + rexw, - (is_inc ? EXT5_INC_Ev : EXT5_DEC_Ev), r0); - } else { - tcg_out8(s, (is_inc ? OPC_INC_r32 : OPC_DEC_r32) + r0); - } - return; - } - - if (c == ARITH_AND) { - if (TCG_TARGET_REG_BITS == 64) { - if (val == 0xffffffffu) { - tcg_out_ext32u(s, r0, r0); - return; - } - if (val == (uint32_t)val) { - /* AND with no high bits set can use a 32-bit operation. */ - rexw = 0; - } - } - if (val == 0xffu && (r0 < 4 || TCG_TARGET_REG_BITS == 64)) { - tcg_out_ext8u(s, r0, r0); - return; - } - if (val == 0xffffu) { - tcg_out_ext16u(s, r0, r0); - return; - } - } - - if (val == (int8_t)val) { - tcg_out_modrm(s, OPC_ARITH_EvIb + rexw, c, r0); - tcg_out8(s, val); - return; - } - if (rexw == 0 || val == (int32_t)val) { - tcg_out_modrm(s, OPC_ARITH_EvIz + rexw, c, r0); - tcg_out32(s, val); - return; - } - - tcg_abort(); -} - -static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val) -{ - if (val != 0) { - tgen_arithi(s, ARITH_ADD + P_REXW, reg, val, 0); - } -} - -/* Use SMALL != 0 to force a short forward branch. */ -static void tcg_out_jxx(TCGContext *s, int opc, TCGLabel *l, int small) -{ - int32_t val, val1; - - if (l->has_value) { - val = tcg_pcrel_diff(s, l->u.value_ptr); - val1 = val - 2; - if ((int8_t)val1 == val1) { - if (opc == -1) { - tcg_out8(s, OPC_JMP_short); - } else { - tcg_out8(s, OPC_JCC_short + opc); - } - tcg_out8(s, val1); - } else { - if (small) { - tcg_abort(); - } - if (opc == -1) { - tcg_out8(s, OPC_JMP_long); - tcg_out32(s, val - 5); - } else { - tcg_out_opc(s, OPC_JCC_long + opc, 0, 0, 0); - tcg_out32(s, val - 6); - } - } - } else if (small) { - if (opc == -1) { - tcg_out8(s, OPC_JMP_short); - } else { - tcg_out8(s, OPC_JCC_short + opc); - } - tcg_out_reloc(s, s->code_ptr, R_386_PC8, l, -1); - s->code_ptr += 1; - } else { - if (opc == -1) { - tcg_out8(s, OPC_JMP_long); - } else { - tcg_out_opc(s, OPC_JCC_long + opc, 0, 0, 0); - } - tcg_out_reloc(s, s->code_ptr, R_386_PC32, l, -4); - s->code_ptr += 4; - } -} - -static void tcg_out_cmp(TCGContext *s, TCGArg arg1, TCGArg arg2, - int const_arg2, int rexw) -{ - if (const_arg2) { - if (arg2 == 0) { - /* test r, r */ - tcg_out_modrm(s, OPC_TESTL + rexw, arg1, arg1); - } else { - tgen_arithi(s, ARITH_CMP + rexw, arg1, arg2, 0); - } - } else { - tgen_arithr(s, ARITH_CMP + rexw, arg1, arg2); - } -} - -static void tcg_out_brcond32(TCGContext *s, TCGCond cond, - TCGArg arg1, TCGArg arg2, int const_arg2, - TCGLabel *label, int small) -{ - tcg_out_cmp(s, arg1, arg2, const_arg2, 0); - tcg_out_jxx(s, tcg_cond_to_jcc[cond], label, small); -} - -#if TCG_TARGET_REG_BITS == 64 -static void tcg_out_brcond64(TCGContext *s, TCGCond cond, - TCGArg arg1, TCGArg arg2, int const_arg2, - TCGLabel *label, int small) -{ - tcg_out_cmp(s, arg1, arg2, const_arg2, P_REXW); - tcg_out_jxx(s, tcg_cond_to_jcc[cond], label, small); -} -#else -/* XXX: we implement it at the target level to avoid having to - handle cross basic blocks temporaries */ -static void tcg_out_brcond2(TCGContext *s, const TCGArg *args, - const int *const_args, int small) -{ - TCGLabel *label_next = gen_new_label(); - TCGLabel *label_this = arg_label(args[5]); - - switch(args[4]) { - case TCG_COND_EQ: - tcg_out_brcond32(s, TCG_COND_NE, args[0], args[2], const_args[2], - label_next, 1); - tcg_out_brcond32(s, TCG_COND_EQ, args[1], args[3], const_args[3], - label_this, small); - break; - case TCG_COND_NE: - tcg_out_brcond32(s, TCG_COND_NE, args[0], args[2], const_args[2], - label_this, small); - tcg_out_brcond32(s, TCG_COND_NE, args[1], args[3], const_args[3], - label_this, small); - break; - case TCG_COND_LT: - tcg_out_brcond32(s, TCG_COND_LT, args[1], args[3], const_args[3], - label_this, small); - tcg_out_jxx(s, JCC_JNE, label_next, 1); - tcg_out_brcond32(s, TCG_COND_LTU, args[0], args[2], const_args[2], - label_this, small); - break; - case TCG_COND_LE: - tcg_out_brcond32(s, TCG_COND_LT, args[1], args[3], const_args[3], - label_this, small); - tcg_out_jxx(s, JCC_JNE, label_next, 1); - tcg_out_brcond32(s, TCG_COND_LEU, args[0], args[2], const_args[2], - label_this, small); - break; - case TCG_COND_GT: - tcg_out_brcond32(s, TCG_COND_GT, args[1], args[3], const_args[3], - label_this, small); - tcg_out_jxx(s, JCC_JNE, label_next, 1); - tcg_out_brcond32(s, TCG_COND_GTU, args[0], args[2], const_args[2], - label_this, small); - break; - case TCG_COND_GE: - tcg_out_brcond32(s, TCG_COND_GT, args[1], args[3], const_args[3], - label_this, small); - tcg_out_jxx(s, JCC_JNE, label_next, 1); - tcg_out_brcond32(s, TCG_COND_GEU, args[0], args[2], const_args[2], - label_this, small); - break; - case TCG_COND_LTU: - tcg_out_brcond32(s, TCG_COND_LTU, args[1], args[3], const_args[3], - label_this, small); - tcg_out_jxx(s, JCC_JNE, label_next, 1); - tcg_out_brcond32(s, TCG_COND_LTU, args[0], args[2], const_args[2], - label_this, small); - break; - case TCG_COND_LEU: - tcg_out_brcond32(s, TCG_COND_LTU, args[1], args[3], const_args[3], - label_this, small); - tcg_out_jxx(s, JCC_JNE, label_next, 1); - tcg_out_brcond32(s, TCG_COND_LEU, args[0], args[2], const_args[2], - label_this, small); - break; - case TCG_COND_GTU: - tcg_out_brcond32(s, TCG_COND_GTU, args[1], args[3], const_args[3], - label_this, small); - tcg_out_jxx(s, JCC_JNE, label_next, 1); - tcg_out_brcond32(s, TCG_COND_GTU, args[0], args[2], const_args[2], - label_this, small); - break; - case TCG_COND_GEU: - tcg_out_brcond32(s, TCG_COND_GTU, args[1], args[3], const_args[3], - label_this, small); - tcg_out_jxx(s, JCC_JNE, label_next, 1); - tcg_out_brcond32(s, TCG_COND_GEU, args[0], args[2], const_args[2], - label_this, small); - break; - default: - tcg_abort(); - } - tcg_out_label(s, label_next, s->code_ptr); -} -#endif - -static void tcg_out_setcond32(TCGContext *s, TCGCond cond, TCGArg dest, - TCGArg arg1, TCGArg arg2, int const_arg2) -{ - tcg_out_cmp(s, arg1, arg2, const_arg2, 0); - tcg_out_modrm(s, OPC_SETCC | tcg_cond_to_jcc[cond], 0, dest); - tcg_out_ext8u(s, dest, dest); -} - -#if TCG_TARGET_REG_BITS == 64 -static void tcg_out_setcond64(TCGContext *s, TCGCond cond, TCGArg dest, - TCGArg arg1, TCGArg arg2, int const_arg2) -{ - tcg_out_cmp(s, arg1, arg2, const_arg2, P_REXW); - tcg_out_modrm(s, OPC_SETCC | tcg_cond_to_jcc[cond], 0, dest); - tcg_out_ext8u(s, dest, dest); -} -#else -static void tcg_out_setcond2(TCGContext *s, const TCGArg *args, - const int *const_args) -{ - TCGArg new_args[6]; - TCGLabel *label_true, *label_over; - - memcpy(new_args, args+1, 5*sizeof(TCGArg)); - - if (args[0] == args[1] || args[0] == args[2] - || (!const_args[3] && args[0] == args[3]) - || (!const_args[4] && args[0] == args[4])) { - /* When the destination overlaps with one of the argument - registers, don't do anything tricky. */ - label_true = gen_new_label(); - label_over = gen_new_label(); - - new_args[5] = label_arg(label_true); - tcg_out_brcond2(s, new_args, const_args+1, 1); - - tcg_out_movi(s, TCG_TYPE_I32, args[0], 0); - tcg_out_jxx(s, JCC_JMP, label_over, 1); - tcg_out_label(s, label_true, s->code_ptr); - - tcg_out_movi(s, TCG_TYPE_I32, args[0], 1); - tcg_out_label(s, label_over, s->code_ptr); - } else { - /* When the destination does not overlap one of the arguments, - clear the destination first, jump if cond false, and emit an - increment in the true case. This results in smaller code. */ - - tcg_out_movi(s, TCG_TYPE_I32, args[0], 0); - - label_over = gen_new_label(); - new_args[4] = tcg_invert_cond(new_args[4]); - new_args[5] = label_arg(label_over); - tcg_out_brcond2(s, new_args, const_args+1, 1); - - tgen_arithi(s, ARITH_ADD, args[0], 1, 0); - tcg_out_label(s, label_over, s->code_ptr); - } -} -#endif - -static void tcg_out_movcond32(TCGContext *s, TCGCond cond, TCGArg dest, - TCGArg c1, TCGArg c2, int const_c2, - TCGArg v1) -{ - tcg_out_cmp(s, c1, c2, const_c2, 0); - if (have_cmov) { - tcg_out_modrm(s, OPC_CMOVCC | tcg_cond_to_jcc[cond], dest, v1); - } else { - TCGLabel *over = gen_new_label(); - tcg_out_jxx(s, tcg_cond_to_jcc[tcg_invert_cond(cond)], over, 1); - tcg_out_mov(s, TCG_TYPE_I32, dest, v1); - tcg_out_label(s, over, s->code_ptr); - } -} - -#if TCG_TARGET_REG_BITS == 64 -static void tcg_out_movcond64(TCGContext *s, TCGCond cond, TCGArg dest, - TCGArg c1, TCGArg c2, int const_c2, - TCGArg v1) -{ - tcg_out_cmp(s, c1, c2, const_c2, P_REXW); - tcg_out_modrm(s, OPC_CMOVCC | tcg_cond_to_jcc[cond] | P_REXW, dest, v1); -} -#endif - -static void tcg_out_branch(TCGContext *s, int call, tcg_insn_unit *dest) -{ - intptr_t disp = tcg_pcrel_diff(s, dest) - 5; - - if (disp == (int32_t)disp) { - tcg_out_opc(s, call ? OPC_CALL_Jz : OPC_JMP_long, 0, 0, 0); - tcg_out32(s, disp); - } else { - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R10, (uintptr_t)dest); - tcg_out_modrm(s, OPC_GRP5, - call ? EXT5_CALLN_Ev : EXT5_JMPN_Ev, TCG_REG_R10); - } -} - -static inline void tcg_out_call(TCGContext *s, tcg_insn_unit *dest) -{ - tcg_out_branch(s, 1, dest); -} - -static void tcg_out_jmp(TCGContext *s, tcg_insn_unit *dest) -{ - tcg_out_branch(s, 0, dest); -} - -#if defined(CONFIG_SOFTMMU) -/* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr, - * int mmu_idx, uintptr_t ra) - */ -static void * const qemu_ld_helpers[16] = { - [MO_UB] = helper_ret_ldub_mmu, - [MO_LEUW] = helper_le_lduw_mmu, - [MO_LEUL] = helper_le_ldul_mmu, - [MO_LEQ] = helper_le_ldq_mmu, - [MO_BEUW] = helper_be_lduw_mmu, - [MO_BEUL] = helper_be_ldul_mmu, - [MO_BEQ] = helper_be_ldq_mmu, -}; - -/* helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr, - * uintxx_t val, int mmu_idx, uintptr_t ra) - */ -static void * const qemu_st_helpers[16] = { - [MO_UB] = helper_ret_stb_mmu, - [MO_LEUW] = helper_le_stw_mmu, - [MO_LEUL] = helper_le_stl_mmu, - [MO_LEQ] = helper_le_stq_mmu, - [MO_BEUW] = helper_be_stw_mmu, - [MO_BEUL] = helper_be_stl_mmu, - [MO_BEQ] = helper_be_stq_mmu, -}; - -/* Perform the TLB load and compare. - - Inputs: - ADDRLO and ADDRHI contain the low and high part of the address. - - MEM_INDEX and S_BITS are the memory context and log2 size of the load. - - WHICH is the offset into the CPUTLBEntry structure of the slot to read. - This should be offsetof addr_read or addr_write. - - Outputs: - LABEL_PTRS is filled with 1 (32-bit addresses) or 2 (64-bit addresses) - positions of the displacements of forward jumps to the TLB miss case. - - Second argument register is loaded with the low part of the address. - In the TLB hit case, it has been adjusted as indicated by the TLB - and so is a host address. In the TLB miss case, it continues to - hold a guest address. - - First argument register is clobbered. */ - -static inline void tcg_out_tlb_load(TCGContext *s, TCGReg addrlo, TCGReg addrhi, - int mem_index, TCGMemOp opc, - tcg_insn_unit **label_ptr, int which) -{ - const TCGReg r0 = TCG_REG_L0; - const TCGReg r1 = TCG_REG_L1; - TCGType ttype = TCG_TYPE_I32; - TCGType tlbtype = TCG_TYPE_I32; - int trexw = 0, hrexw = 0, tlbrexw = 0; - int s_mask = (1 << (opc & MO_SIZE)) - 1; - bool aligned = (opc & MO_AMASK) == MO_ALIGN || s_mask == 0; - - if (TCG_TARGET_REG_BITS == 64) { - if (TARGET_LONG_BITS == 64) { - ttype = TCG_TYPE_I64; - trexw = P_REXW; - } - if (TCG_TYPE_PTR == TCG_TYPE_I64) { - hrexw = P_REXW; - if (TARGET_PAGE_BITS + CPU_TLB_BITS > 32) { - tlbtype = TCG_TYPE_I64; - tlbrexw = P_REXW; - } - } - } - - tcg_out_mov(s, tlbtype, r0, addrlo); - if (aligned) { - tcg_out_mov(s, ttype, r1, addrlo); - } else { - /* For unaligned access check that we don't cross pages using - the page address of the last byte. */ - tcg_out_modrm_offset(s, OPC_LEA + trexw, r1, addrlo, s_mask); - } - - tcg_out_shifti(s, SHIFT_SHR + tlbrexw, r0, - TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); - - tgen_arithi(s, ARITH_AND + trexw, r1, - TARGET_PAGE_MASK | (aligned ? s_mask : 0), 0); - tgen_arithi(s, ARITH_AND + tlbrexw, r0, - (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS, 0); - - tcg_out_modrm_sib_offset(s, OPC_LEA + hrexw, r0, TCG_AREG0, r0, 0, - offsetof(CPUArchState, tlb_table[mem_index][0]) - + which); - - /* cmp 0(r0), r1 */ - tcg_out_modrm_offset(s, OPC_CMP_GvEv + trexw, r1, r0, 0); - - /* Prepare for both the fast path add of the tlb addend, and the slow - path function argument setup. There are two cases worth note: - For 32-bit guest and x86_64 host, MOVL zero-extends the guest address - before the fastpath ADDQ below. For 64-bit guest and x32 host, MOVQ - copies the entire guest address for the slow path, while truncation - for the 32-bit host happens with the fastpath ADDL below. */ - tcg_out_mov(s, ttype, r1, addrlo); - - /* jne slow_path */ - tcg_out_opc(s, OPC_JCC_long + JCC_JNE, 0, 0, 0); - label_ptr[0] = s->code_ptr; - s->code_ptr += 4; - - if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) { - /* cmp 4(r0), addrhi */ - tcg_out_modrm_offset(s, OPC_CMP_GvEv, addrhi, r0, 4); - - /* jne slow_path */ - tcg_out_opc(s, OPC_JCC_long + JCC_JNE, 0, 0, 0); - label_ptr[1] = s->code_ptr; - s->code_ptr += 4; - } - - /* TLB Hit. */ - - /* add addend(r0), r1 */ - tcg_out_modrm_offset(s, OPC_ADD_GvEv + hrexw, r1, r0, - offsetof(CPUTLBEntry, addend) - which); -} - -/* - * Record the context of a call to the out of line helper code for the slow path - * for a load or store, so that we can later generate the correct helper code - */ -static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi, - TCGReg datalo, TCGReg datahi, - TCGReg addrlo, TCGReg addrhi, - tcg_insn_unit *raddr, - tcg_insn_unit **label_ptr) -{ - TCGLabelQemuLdst *label = new_ldst_label(s); - - label->is_ld = is_ld; - label->oi = oi; - label->datalo_reg = datalo; - label->datahi_reg = datahi; - label->addrlo_reg = addrlo; - label->addrhi_reg = addrhi; - label->raddr = raddr; - label->label_ptr[0] = label_ptr[0]; - if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) { - label->label_ptr[1] = label_ptr[1]; - } -} - -/* - * Generate code for the slow path for a load at the end of block - */ -static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l) -{ - TCGMemOpIdx oi = l->oi; - TCGMemOp opc = get_memop(oi); - TCGReg data_reg; - tcg_insn_unit **label_ptr = &l->label_ptr[0]; - - /* resolve label address */ - tcg_patch32(label_ptr[0], s->code_ptr - label_ptr[0] - 4); - if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) { - tcg_patch32(label_ptr[1], s->code_ptr - label_ptr[1] - 4); - } - - if (TCG_TARGET_REG_BITS == 32) { - int ofs = 0; - - tcg_out_st(s, TCG_TYPE_PTR, TCG_AREG0, TCG_REG_ESP, ofs); - ofs += 4; - - tcg_out_st(s, TCG_TYPE_I32, l->addrlo_reg, TCG_REG_ESP, ofs); - ofs += 4; - - if (TARGET_LONG_BITS == 64) { - tcg_out_st(s, TCG_TYPE_I32, l->addrhi_reg, TCG_REG_ESP, ofs); - ofs += 4; - } - - tcg_out_sti(s, TCG_TYPE_I32, TCG_REG_ESP, ofs, oi); - ofs += 4; - - tcg_out_sti(s, TCG_TYPE_PTR, TCG_REG_ESP, ofs, (uintptr_t)l->raddr); - } else { - tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0); - /* The second argument is already loaded with addrlo. */ - tcg_out_movi(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[2], oi); - tcg_out_movi(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[3], - (uintptr_t)l->raddr); - } - - tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SIZE)]); - - data_reg = l->datalo_reg; - switch (opc & MO_SSIZE) { - case MO_SB: - tcg_out_ext8s(s, data_reg, TCG_REG_EAX, P_REXW); - break; - case MO_SW: - tcg_out_ext16s(s, data_reg, TCG_REG_EAX, P_REXW); - break; -#if TCG_TARGET_REG_BITS == 64 - case MO_SL: - tcg_out_ext32s(s, data_reg, TCG_REG_EAX); - break; -#endif - case MO_UB: - case MO_UW: - /* Note that the helpers have zero-extended to tcg_target_long. */ - case MO_UL: - tcg_out_mov(s, TCG_TYPE_I32, data_reg, TCG_REG_EAX); - break; - case MO_Q: - if (TCG_TARGET_REG_BITS == 64) { - tcg_out_mov(s, TCG_TYPE_I64, data_reg, TCG_REG_RAX); - } else if (data_reg == TCG_REG_EDX) { - /* xchg %edx, %eax */ - tcg_out_opc(s, OPC_XCHG_ax_r32 + TCG_REG_EDX, 0, 0, 0); - tcg_out_mov(s, TCG_TYPE_I32, l->datahi_reg, TCG_REG_EAX); - } else { - tcg_out_mov(s, TCG_TYPE_I32, data_reg, TCG_REG_EAX); - tcg_out_mov(s, TCG_TYPE_I32, l->datahi_reg, TCG_REG_EDX); - } - break; - default: - tcg_abort(); - } - - /* Jump to the code corresponding to next IR of qemu_st */ - tcg_out_jmp(s, l->raddr); -} - -/* - * Generate code for the slow path for a store at the end of block - */ -static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) -{ - TCGMemOpIdx oi = l->oi; - TCGMemOp opc = get_memop(oi); - TCGMemOp s_bits = opc & MO_SIZE; - tcg_insn_unit **label_ptr = &l->label_ptr[0]; - TCGReg retaddr; - - /* resolve label address */ - tcg_patch32(label_ptr[0], s->code_ptr - label_ptr[0] - 4); - if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) { - tcg_patch32(label_ptr[1], s->code_ptr - label_ptr[1] - 4); - } - - if (TCG_TARGET_REG_BITS == 32) { - int ofs = 0; - - tcg_out_st(s, TCG_TYPE_PTR, TCG_AREG0, TCG_REG_ESP, ofs); - ofs += 4; - - tcg_out_st(s, TCG_TYPE_I32, l->addrlo_reg, TCG_REG_ESP, ofs); - ofs += 4; - - if (TARGET_LONG_BITS == 64) { - tcg_out_st(s, TCG_TYPE_I32, l->addrhi_reg, TCG_REG_ESP, ofs); - ofs += 4; - } - - tcg_out_st(s, TCG_TYPE_I32, l->datalo_reg, TCG_REG_ESP, ofs); - ofs += 4; - - if (s_bits == MO_64) { - tcg_out_st(s, TCG_TYPE_I32, l->datahi_reg, TCG_REG_ESP, ofs); - ofs += 4; - } - - tcg_out_sti(s, TCG_TYPE_I32, TCG_REG_ESP, ofs, oi); - ofs += 4; - - retaddr = TCG_REG_EAX; - tcg_out_movi(s, TCG_TYPE_PTR, retaddr, (uintptr_t)l->raddr); - tcg_out_st(s, TCG_TYPE_PTR, retaddr, TCG_REG_ESP, ofs); - } else { - tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0); - /* The second argument is already loaded with addrlo. */ - tcg_out_mov(s, (s_bits == MO_64 ? TCG_TYPE_I64 : TCG_TYPE_I32), - tcg_target_call_iarg_regs[2], l->datalo_reg); - tcg_out_movi(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[3], oi); - - if (ARRAY_SIZE(tcg_target_call_iarg_regs) > 4) { - retaddr = tcg_target_call_iarg_regs[4]; - tcg_out_movi(s, TCG_TYPE_PTR, retaddr, (uintptr_t)l->raddr); - } else { - retaddr = TCG_REG_RAX; - tcg_out_movi(s, TCG_TYPE_PTR, retaddr, (uintptr_t)l->raddr); - tcg_out_st(s, TCG_TYPE_PTR, retaddr, TCG_REG_ESP, - TCG_TARGET_CALL_STACK_OFFSET); - } - } - - /* "Tail call" to the helper, with the return address back inline. */ - tcg_out_push(s, retaddr); - tcg_out_jmp(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]); -} -#elif defined(__x86_64__) && defined(__linux__) -# include <asm/prctl.h> -# include <sys/prctl.h> - -int arch_prctl(int code, unsigned long addr); - -static int guest_base_flags; -static inline void setup_guest_base_seg(void) -{ - if (arch_prctl(ARCH_SET_GS, guest_base) == 0) { - guest_base_flags = P_GS; - } -} -#else -# define guest_base_flags 0 -static inline void setup_guest_base_seg(void) { } -#endif /* SOFTMMU */ - -static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg datalo, TCGReg datahi, - TCGReg base, int index, intptr_t ofs, - int seg, TCGMemOp memop) -{ - const TCGMemOp real_bswap = memop & MO_BSWAP; - TCGMemOp bswap = real_bswap; - int movop = OPC_MOVL_GvEv; - - if (have_movbe && real_bswap) { - bswap = 0; - movop = OPC_MOVBE_GyMy; - } - - switch (memop & MO_SSIZE) { - case MO_UB: - tcg_out_modrm_sib_offset(s, OPC_MOVZBL + seg, datalo, - base, index, 0, ofs); - break; - case MO_SB: - tcg_out_modrm_sib_offset(s, OPC_MOVSBL + P_REXW + seg, datalo, - base, index, 0, ofs); - break; - case MO_UW: - tcg_out_modrm_sib_offset(s, OPC_MOVZWL + seg, datalo, - base, index, 0, ofs); - if (real_bswap) { - tcg_out_rolw_8(s, datalo); - } - break; - case MO_SW: - if (real_bswap) { - if (have_movbe) { - tcg_out_modrm_sib_offset(s, OPC_MOVBE_GyMy + P_DATA16 + seg, - datalo, base, index, 0, ofs); - } else { - tcg_out_modrm_sib_offset(s, OPC_MOVZWL + seg, datalo, - base, index, 0, ofs); - tcg_out_rolw_8(s, datalo); - } - tcg_out_modrm(s, OPC_MOVSWL + P_REXW, datalo, datalo); - } else { - tcg_out_modrm_sib_offset(s, OPC_MOVSWL + P_REXW + seg, - datalo, base, index, 0, ofs); - } - break; - case MO_UL: - tcg_out_modrm_sib_offset(s, movop + seg, datalo, base, index, 0, ofs); - if (bswap) { - tcg_out_bswap32(s, datalo); - } - break; -#if TCG_TARGET_REG_BITS == 64 - case MO_SL: - if (real_bswap) { - tcg_out_modrm_sib_offset(s, movop + seg, datalo, - base, index, 0, ofs); - if (bswap) { - tcg_out_bswap32(s, datalo); - } - tcg_out_ext32s(s, datalo, datalo); - } else { - tcg_out_modrm_sib_offset(s, OPC_MOVSLQ + seg, datalo, - base, index, 0, ofs); - } - break; -#endif - case MO_Q: - if (TCG_TARGET_REG_BITS == 64) { - tcg_out_modrm_sib_offset(s, movop + P_REXW + seg, datalo, - base, index, 0, ofs); - if (bswap) { - tcg_out_bswap64(s, datalo); - } - } else { - if (real_bswap) { - int t = datalo; - datalo = datahi; - datahi = t; - } - if (base != datalo) { - tcg_out_modrm_sib_offset(s, movop + seg, datalo, - base, index, 0, ofs); - tcg_out_modrm_sib_offset(s, movop + seg, datahi, - base, index, 0, ofs + 4); - } else { - tcg_out_modrm_sib_offset(s, movop + seg, datahi, - base, index, 0, ofs + 4); - tcg_out_modrm_sib_offset(s, movop + seg, datalo, - base, index, 0, ofs); - } - if (bswap) { - tcg_out_bswap32(s, datalo); - tcg_out_bswap32(s, datahi); - } - } - break; - default: - tcg_abort(); - } -} - -/* XXX: qemu_ld and qemu_st could be modified to clobber only EDX and - EAX. It will be useful once fixed registers globals are less - common. */ -static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is64) -{ - TCGReg datalo, datahi, addrlo; - TCGReg addrhi __attribute__((unused)); - TCGMemOpIdx oi; - TCGMemOp opc; -#if defined(CONFIG_SOFTMMU) - int mem_index; - tcg_insn_unit *label_ptr[2]; -#endif - - datalo = *args++; - datahi = (TCG_TARGET_REG_BITS == 32 && is64 ? *args++ : 0); - addrlo = *args++; - addrhi = (TARGET_LONG_BITS > TCG_TARGET_REG_BITS ? *args++ : 0); - oi = *args++; - opc = get_memop(oi); - -#if defined(CONFIG_SOFTMMU) - mem_index = get_mmuidx(oi); - - tcg_out_tlb_load(s, addrlo, addrhi, mem_index, opc, - label_ptr, offsetof(CPUTLBEntry, addr_read)); - - /* TLB Hit. */ - tcg_out_qemu_ld_direct(s, datalo, datahi, TCG_REG_L1, -1, 0, 0, opc); - - /* Record the current context of a load into ldst label */ - add_qemu_ldst_label(s, true, oi, datalo, datahi, addrlo, addrhi, - s->code_ptr, label_ptr); -#else - { - int32_t offset = guest_base; - TCGReg base = addrlo; - int index = -1; - int seg = 0; - - /* For a 32-bit guest, the high 32 bits may contain garbage. - We can do this with the ADDR32 prefix if we're not using - a guest base, or when using segmentation. Otherwise we - need to zero-extend manually. */ - if (guest_base == 0 || guest_base_flags) { - seg = guest_base_flags; - offset = 0; - if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { - seg |= P_ADDR32; - } - } else if (TCG_TARGET_REG_BITS == 64) { - if (TARGET_LONG_BITS == 32) { - tcg_out_ext32u(s, TCG_REG_L0, base); - base = TCG_REG_L0; - } - if (offset != guest_base) { - tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_L1, guest_base); - index = TCG_REG_L1; - offset = 0; - } - } - - tcg_out_qemu_ld_direct(s, datalo, datahi, - base, index, offset, seg, opc); - } -#endif -} - -static void tcg_out_qemu_st_direct(TCGContext *s, TCGReg datalo, TCGReg datahi, - TCGReg base, intptr_t ofs, int seg, - TCGMemOp memop) -{ - /* ??? Ideally we wouldn't need a scratch register. For user-only, - we could perform the bswap twice to restore the original value - instead of moving to the scratch. But as it is, the L constraint - means that TCG_REG_L0 is definitely free here. */ - const TCGReg scratch = TCG_REG_L0; - const TCGMemOp real_bswap = memop & MO_BSWAP; - TCGMemOp bswap = real_bswap; - int movop = OPC_MOVL_EvGv; - - if (have_movbe && real_bswap) { - bswap = 0; - movop = OPC_MOVBE_MyGy; - } - - switch (memop & MO_SIZE) { - case MO_8: - /* In 32-bit mode, 8-bit stores can only happen from [abcd]x. - Use the scratch register if necessary. */ - if (TCG_TARGET_REG_BITS == 32 && datalo >= 4) { - tcg_out_mov(s, TCG_TYPE_I32, scratch, datalo); - datalo = scratch; - } - tcg_out_modrm_offset(s, OPC_MOVB_EvGv + P_REXB_R + seg, - datalo, base, ofs); - break; - case MO_16: - if (bswap) { - tcg_out_mov(s, TCG_TYPE_I32, scratch, datalo); - tcg_out_rolw_8(s, scratch); - datalo = scratch; - } - tcg_out_modrm_offset(s, movop + P_DATA16 + seg, datalo, base, ofs); - break; - case MO_32: - if (bswap) { - tcg_out_mov(s, TCG_TYPE_I32, scratch, datalo); - tcg_out_bswap32(s, scratch); - datalo = scratch; - } - tcg_out_modrm_offset(s, movop + seg, datalo, base, ofs); - break; - case MO_64: - if (TCG_TARGET_REG_BITS == 64) { - if (bswap) { - tcg_out_mov(s, TCG_TYPE_I64, scratch, datalo); - tcg_out_bswap64(s, scratch); - datalo = scratch; - } - tcg_out_modrm_offset(s, movop + P_REXW + seg, datalo, base, ofs); - } else if (bswap) { - tcg_out_mov(s, TCG_TYPE_I32, scratch, datahi); - tcg_out_bswap32(s, scratch); - tcg_out_modrm_offset(s, OPC_MOVL_EvGv + seg, scratch, base, ofs); - tcg_out_mov(s, TCG_TYPE_I32, scratch, datalo); - tcg_out_bswap32(s, scratch); - tcg_out_modrm_offset(s, OPC_MOVL_EvGv + seg, scratch, base, ofs+4); - } else { - if (real_bswap) { - int t = datalo; - datalo = datahi; - datahi = t; - } - tcg_out_modrm_offset(s, movop + seg, datalo, base, ofs); - tcg_out_modrm_offset(s, movop + seg, datahi, base, ofs+4); - } - break; - default: - tcg_abort(); - } -} - -static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64) -{ - TCGReg datalo, datahi, addrlo; - TCGReg addrhi __attribute__((unused)); - TCGMemOpIdx oi; - TCGMemOp opc; -#if defined(CONFIG_SOFTMMU) - int mem_index; - tcg_insn_unit *label_ptr[2]; -#endif - - datalo = *args++; - datahi = (TCG_TARGET_REG_BITS == 32 && is64 ? *args++ : 0); - addrlo = *args++; - addrhi = (TARGET_LONG_BITS > TCG_TARGET_REG_BITS ? *args++ : 0); - oi = *args++; - opc = get_memop(oi); - -#if defined(CONFIG_SOFTMMU) - mem_index = get_mmuidx(oi); - - tcg_out_tlb_load(s, addrlo, addrhi, mem_index, opc, - label_ptr, offsetof(CPUTLBEntry, addr_write)); - - /* TLB Hit. */ - tcg_out_qemu_st_direct(s, datalo, datahi, TCG_REG_L1, 0, 0, opc); - - /* Record the current context of a store into ldst label */ - add_qemu_ldst_label(s, false, oi, datalo, datahi, addrlo, addrhi, - s->code_ptr, label_ptr); -#else - { - int32_t offset = guest_base; - TCGReg base = addrlo; - int seg = 0; - - /* See comment in tcg_out_qemu_ld re zero-extension of addrlo. */ - if (guest_base == 0 || guest_base_flags) { - seg = guest_base_flags; - offset = 0; - if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { - seg |= P_ADDR32; - } - } else if (TCG_TARGET_REG_BITS == 64) { - /* ??? Note that we can't use the same SIB addressing scheme - as for loads, since we require L0 free for bswap. */ - if (offset != guest_base) { - if (TARGET_LONG_BITS == 32) { - tcg_out_ext32u(s, TCG_REG_L0, base); - base = TCG_REG_L0; - } - tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_L1, guest_base); - tgen_arithr(s, ARITH_ADD + P_REXW, TCG_REG_L1, base); - base = TCG_REG_L1; - offset = 0; - } else if (TARGET_LONG_BITS == 32) { - tcg_out_ext32u(s, TCG_REG_L1, base); - base = TCG_REG_L1; - } - } - - tcg_out_qemu_st_direct(s, datalo, datahi, base, offset, seg, opc); - } -#endif -} - -static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, - const TCGArg *args, const int *const_args) -{ - int c, vexop, rexw = 0; - -#if TCG_TARGET_REG_BITS == 64 -# define OP_32_64(x) \ - case glue(glue(INDEX_op_, x), _i64): \ - rexw = P_REXW; /* FALLTHRU */ \ - case glue(glue(INDEX_op_, x), _i32) -#else -# define OP_32_64(x) \ - case glue(glue(INDEX_op_, x), _i32) -#endif - - switch(opc) { - case INDEX_op_exit_tb: - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_EAX, args[0]); - tcg_out_jmp(s, tb_ret_addr); - break; - case INDEX_op_goto_tb: - if (s->tb_jmp_offset) { - /* direct jump method */ - tcg_out8(s, OPC_JMP_long); /* jmp im */ - s->tb_jmp_offset[args[0]] = tcg_current_code_size(s); - tcg_out32(s, 0); - } else { - /* indirect jump method */ - tcg_out_modrm_offset(s, OPC_GRP5, EXT5_JMPN_Ev, -1, - (intptr_t)(s->tb_next + args[0])); - } - s->tb_next_offset[args[0]] = tcg_current_code_size(s); - break; - case INDEX_op_br: - tcg_out_jxx(s, JCC_JMP, arg_label(args[0]), 0); - break; - OP_32_64(ld8u): - /* Note that we can ignore REXW for the zero-extend to 64-bit. */ - tcg_out_modrm_offset(s, OPC_MOVZBL, args[0], args[1], args[2]); - break; - OP_32_64(ld8s): - tcg_out_modrm_offset(s, OPC_MOVSBL + rexw, args[0], args[1], args[2]); - break; - OP_32_64(ld16u): - /* Note that we can ignore REXW for the zero-extend to 64-bit. */ - tcg_out_modrm_offset(s, OPC_MOVZWL, args[0], args[1], args[2]); - break; - OP_32_64(ld16s): - tcg_out_modrm_offset(s, OPC_MOVSWL + rexw, args[0], args[1], args[2]); - break; -#if TCG_TARGET_REG_BITS == 64 - case INDEX_op_ld32u_i64: -#endif - case INDEX_op_ld_i32: - tcg_out_ld(s, TCG_TYPE_I32, args[0], args[1], args[2]); - break; - - OP_32_64(st8): - if (const_args[0]) { - tcg_out_modrm_offset(s, OPC_MOVB_EvIz, - 0, args[1], args[2]); - tcg_out8(s, args[0]); - } else { - tcg_out_modrm_offset(s, OPC_MOVB_EvGv | P_REXB_R, - args[0], args[1], args[2]); - } - break; - OP_32_64(st16): - if (const_args[0]) { - tcg_out_modrm_offset(s, OPC_MOVL_EvIz | P_DATA16, - 0, args[1], args[2]); - tcg_out16(s, args[0]); - } else { - tcg_out_modrm_offset(s, OPC_MOVL_EvGv | P_DATA16, - args[0], args[1], args[2]); - } - break; -#if TCG_TARGET_REG_BITS == 64 - case INDEX_op_st32_i64: -#endif - case INDEX_op_st_i32: - if (const_args[0]) { - tcg_out_modrm_offset(s, OPC_MOVL_EvIz, 0, args[1], args[2]); - tcg_out32(s, args[0]); - } else { - tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]); - } - break; - - OP_32_64(add): - /* For 3-operand addition, use LEA. */ - if (args[0] != args[1]) { - TCGArg a0 = args[0], a1 = args[1], a2 = args[2], c3 = 0; - - if (const_args[2]) { - c3 = a2, a2 = -1; - } else if (a0 == a2) { - /* Watch out for dest = src + dest, since we've removed - the matching constraint on the add. */ - tgen_arithr(s, ARITH_ADD + rexw, a0, a1); - break; - } - - tcg_out_modrm_sib_offset(s, OPC_LEA + rexw, a0, a1, a2, 0, c3); - break; - } - c = ARITH_ADD; - goto gen_arith; - OP_32_64(sub): - c = ARITH_SUB; - goto gen_arith; - OP_32_64(and): - c = ARITH_AND; - goto gen_arith; - OP_32_64(or): - c = ARITH_OR; - goto gen_arith; - OP_32_64(xor): - c = ARITH_XOR; - goto gen_arith; - gen_arith: - if (const_args[2]) { - tgen_arithi(s, c + rexw, args[0], args[2], 0); - } else { - tgen_arithr(s, c + rexw, args[0], args[2]); - } - break; - - OP_32_64(andc): - if (const_args[2]) { - tcg_out_mov(s, rexw ? TCG_TYPE_I64 : TCG_TYPE_I32, - args[0], args[1]); - tgen_arithi(s, ARITH_AND + rexw, args[0], ~args[2], 0); - } else { - tcg_out_vex_modrm(s, OPC_ANDN + rexw, args[0], args[2], args[1]); - } - break; - - OP_32_64(mul): - if (const_args[2]) { - int32_t val; - val = args[2]; - if (val == (int8_t)val) { - tcg_out_modrm(s, OPC_IMUL_GvEvIb + rexw, args[0], args[0]); - tcg_out8(s, val); - } else { - tcg_out_modrm(s, OPC_IMUL_GvEvIz + rexw, args[0], args[0]); - tcg_out32(s, val); - } - } else { - tcg_out_modrm(s, OPC_IMUL_GvEv + rexw, args[0], args[2]); - } - break; - - OP_32_64(div2): - tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_IDIV, args[4]); - break; - OP_32_64(divu2): - tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_DIV, args[4]); - break; - - OP_32_64(shl): - c = SHIFT_SHL; - vexop = OPC_SHLX; - goto gen_shift_maybe_vex; - OP_32_64(shr): - c = SHIFT_SHR; - vexop = OPC_SHRX; - goto gen_shift_maybe_vex; - OP_32_64(sar): - c = SHIFT_SAR; - vexop = OPC_SARX; - goto gen_shift_maybe_vex; - OP_32_64(rotl): - c = SHIFT_ROL; - goto gen_shift; - OP_32_64(rotr): - c = SHIFT_ROR; - goto gen_shift; - gen_shift_maybe_vex: - if (have_bmi2 && !const_args[2]) { - tcg_out_vex_modrm(s, vexop + rexw, args[0], args[2], args[1]); - break; - } - /* FALLTHRU */ - gen_shift: - if (const_args[2]) { - tcg_out_shifti(s, c + rexw, args[0], args[2]); - } else { - tcg_out_modrm(s, OPC_SHIFT_cl + rexw, c, args[0]); - } - break; - - case INDEX_op_brcond_i32: - tcg_out_brcond32(s, args[2], args[0], args[1], const_args[1], - arg_label(args[3]), 0); - break; - case INDEX_op_setcond_i32: - tcg_out_setcond32(s, args[3], args[0], args[1], - args[2], const_args[2]); - break; - case INDEX_op_movcond_i32: - tcg_out_movcond32(s, args[5], args[0], args[1], - args[2], const_args[2], args[3]); - break; - - OP_32_64(bswap16): - tcg_out_rolw_8(s, args[0]); - break; - OP_32_64(bswap32): - tcg_out_bswap32(s, args[0]); - break; - - OP_32_64(neg): - tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_NEG, args[0]); - break; - OP_32_64(not): - tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_NOT, args[0]); - break; - - OP_32_64(ext8s): - tcg_out_ext8s(s, args[0], args[1], rexw); - break; - OP_32_64(ext16s): - tcg_out_ext16s(s, args[0], args[1], rexw); - break; - OP_32_64(ext8u): - tcg_out_ext8u(s, args[0], args[1]); - break; - OP_32_64(ext16u): - tcg_out_ext16u(s, args[0], args[1]); - break; - - case INDEX_op_qemu_ld_i32: - tcg_out_qemu_ld(s, args, 0); - break; - case INDEX_op_qemu_ld_i64: - tcg_out_qemu_ld(s, args, 1); - break; - case INDEX_op_qemu_st_i32: - tcg_out_qemu_st(s, args, 0); - break; - case INDEX_op_qemu_st_i64: - tcg_out_qemu_st(s, args, 1); - break; - - OP_32_64(mulu2): - tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_MUL, args[3]); - break; - OP_32_64(muls2): - tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_IMUL, args[3]); - break; - OP_32_64(add2): - if (const_args[4]) { - tgen_arithi(s, ARITH_ADD + rexw, args[0], args[4], 1); - } else { - tgen_arithr(s, ARITH_ADD + rexw, args[0], args[4]); - } - if (const_args[5]) { - tgen_arithi(s, ARITH_ADC + rexw, args[1], args[5], 1); - } else { - tgen_arithr(s, ARITH_ADC + rexw, args[1], args[5]); - } - break; - OP_32_64(sub2): - if (const_args[4]) { - tgen_arithi(s, ARITH_SUB + rexw, args[0], args[4], 1); - } else { - tgen_arithr(s, ARITH_SUB + rexw, args[0], args[4]); - } - if (const_args[5]) { - tgen_arithi(s, ARITH_SBB + rexw, args[1], args[5], 1); - } else { - tgen_arithr(s, ARITH_SBB + rexw, args[1], args[5]); - } - break; - -#if TCG_TARGET_REG_BITS == 32 - case INDEX_op_brcond2_i32: - tcg_out_brcond2(s, args, const_args, 0); - break; - case INDEX_op_setcond2_i32: - tcg_out_setcond2(s, args, const_args); - break; -#else /* TCG_TARGET_REG_BITS == 64 */ - case INDEX_op_ld32s_i64: - tcg_out_modrm_offset(s, OPC_MOVSLQ, args[0], args[1], args[2]); - break; - case INDEX_op_ld_i64: - tcg_out_ld(s, TCG_TYPE_I64, args[0], args[1], args[2]); - break; - case INDEX_op_st_i64: - if (const_args[0]) { - tcg_out_modrm_offset(s, OPC_MOVL_EvIz | P_REXW, - 0, args[1], args[2]); - tcg_out32(s, args[0]); - } else { - tcg_out_st(s, TCG_TYPE_I64, args[0], args[1], args[2]); - } - break; - - case INDEX_op_brcond_i64: - tcg_out_brcond64(s, args[2], args[0], args[1], const_args[1], - arg_label(args[3]), 0); - break; - case INDEX_op_setcond_i64: - tcg_out_setcond64(s, args[3], args[0], args[1], - args[2], const_args[2]); - break; - case INDEX_op_movcond_i64: - tcg_out_movcond64(s, args[5], args[0], args[1], - args[2], const_args[2], args[3]); - break; - - case INDEX_op_bswap64_i64: - tcg_out_bswap64(s, args[0]); - break; - case INDEX_op_extu_i32_i64: - case INDEX_op_ext32u_i64: - tcg_out_ext32u(s, args[0], args[1]); - break; - case INDEX_op_ext_i32_i64: - case INDEX_op_ext32s_i64: - tcg_out_ext32s(s, args[0], args[1]); - break; -#endif - - OP_32_64(deposit): - if (args[3] == 0 && args[4] == 8) { - /* load bits 0..7 */ - tcg_out_modrm(s, OPC_MOVB_EvGv | P_REXB_R | P_REXB_RM, - args[2], args[0]); - } else if (args[3] == 8 && args[4] == 8) { - /* load bits 8..15 */ - tcg_out_modrm(s, OPC_MOVB_EvGv, args[2], args[0] + 4); - } else if (args[3] == 0 && args[4] == 16) { - /* load bits 0..15 */ - tcg_out_modrm(s, OPC_MOVL_EvGv | P_DATA16, args[2], args[0]); - } else { - tcg_abort(); - } - break; - - case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ - case INDEX_op_mov_i64: - case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */ - case INDEX_op_movi_i64: - case INDEX_op_call: /* Always emitted via tcg_out_call. */ - default: - tcg_abort(); - } - -#undef OP_32_64 -} - -static const TCGTargetOpDef x86_op_defs[] = { - { INDEX_op_exit_tb, { } }, - { INDEX_op_goto_tb, { } }, - { INDEX_op_br, { } }, - { INDEX_op_ld8u_i32, { "r", "r" } }, - { INDEX_op_ld8s_i32, { "r", "r" } }, - { INDEX_op_ld16u_i32, { "r", "r" } }, - { INDEX_op_ld16s_i32, { "r", "r" } }, - { INDEX_op_ld_i32, { "r", "r" } }, - { INDEX_op_st8_i32, { "qi", "r" } }, - { INDEX_op_st16_i32, { "ri", "r" } }, - { INDEX_op_st_i32, { "ri", "r" } }, - - { INDEX_op_add_i32, { "r", "r", "ri" } }, - { INDEX_op_sub_i32, { "r", "0", "ri" } }, - { INDEX_op_mul_i32, { "r", "0", "ri" } }, - { INDEX_op_div2_i32, { "a", "d", "0", "1", "r" } }, - { INDEX_op_divu2_i32, { "a", "d", "0", "1", "r" } }, - { INDEX_op_and_i32, { "r", "0", "ri" } }, - { INDEX_op_or_i32, { "r", "0", "ri" } }, - { INDEX_op_xor_i32, { "r", "0", "ri" } }, - { INDEX_op_andc_i32, { "r", "r", "ri" } }, - - { INDEX_op_shl_i32, { "r", "0", "Ci" } }, - { INDEX_op_shr_i32, { "r", "0", "Ci" } }, - { INDEX_op_sar_i32, { "r", "0", "Ci" } }, - { INDEX_op_rotl_i32, { "r", "0", "ci" } }, - { INDEX_op_rotr_i32, { "r", "0", "ci" } }, - - { INDEX_op_brcond_i32, { "r", "ri" } }, - - { INDEX_op_bswap16_i32, { "r", "0" } }, - { INDEX_op_bswap32_i32, { "r", "0" } }, - - { INDEX_op_neg_i32, { "r", "0" } }, - - { INDEX_op_not_i32, { "r", "0" } }, - - { INDEX_op_ext8s_i32, { "r", "q" } }, - { INDEX_op_ext16s_i32, { "r", "r" } }, - { INDEX_op_ext8u_i32, { "r", "q" } }, - { INDEX_op_ext16u_i32, { "r", "r" } }, - - { INDEX_op_setcond_i32, { "q", "r", "ri" } }, - - { INDEX_op_deposit_i32, { "Q", "0", "Q" } }, - { INDEX_op_movcond_i32, { "r", "r", "ri", "r", "0" } }, - - { INDEX_op_mulu2_i32, { "a", "d", "a", "r" } }, - { INDEX_op_muls2_i32, { "a", "d", "a", "r" } }, - { INDEX_op_add2_i32, { "r", "r", "0", "1", "ri", "ri" } }, - { INDEX_op_sub2_i32, { "r", "r", "0", "1", "ri", "ri" } }, - -#if TCG_TARGET_REG_BITS == 32 - { INDEX_op_brcond2_i32, { "r", "r", "ri", "ri" } }, - { INDEX_op_setcond2_i32, { "r", "r", "r", "ri", "ri" } }, -#else - { INDEX_op_ld8u_i64, { "r", "r" } }, - { INDEX_op_ld8s_i64, { "r", "r" } }, - { INDEX_op_ld16u_i64, { "r", "r" } }, - { INDEX_op_ld16s_i64, { "r", "r" } }, - { INDEX_op_ld32u_i64, { "r", "r" } }, - { INDEX_op_ld32s_i64, { "r", "r" } }, - { INDEX_op_ld_i64, { "r", "r" } }, - { INDEX_op_st8_i64, { "ri", "r" } }, - { INDEX_op_st16_i64, { "ri", "r" } }, - { INDEX_op_st32_i64, { "ri", "r" } }, - { INDEX_op_st_i64, { "re", "r" } }, - - { INDEX_op_add_i64, { "r", "r", "re" } }, - { INDEX_op_mul_i64, { "r", "0", "re" } }, - { INDEX_op_div2_i64, { "a", "d", "0", "1", "r" } }, - { INDEX_op_divu2_i64, { "a", "d", "0", "1", "r" } }, - { INDEX_op_sub_i64, { "r", "0", "re" } }, - { INDEX_op_and_i64, { "r", "0", "reZ" } }, - { INDEX_op_or_i64, { "r", "0", "re" } }, - { INDEX_op_xor_i64, { "r", "0", "re" } }, - { INDEX_op_andc_i64, { "r", "r", "rI" } }, - - { INDEX_op_shl_i64, { "r", "0", "Ci" } }, - { INDEX_op_shr_i64, { "r", "0", "Ci" } }, - { INDEX_op_sar_i64, { "r", "0", "Ci" } }, - { INDEX_op_rotl_i64, { "r", "0", "ci" } }, - { INDEX_op_rotr_i64, { "r", "0", "ci" } }, - - { INDEX_op_brcond_i64, { "r", "re" } }, - { INDEX_op_setcond_i64, { "r", "r", "re" } }, - - { INDEX_op_bswap16_i64, { "r", "0" } }, - { INDEX_op_bswap32_i64, { "r", "0" } }, - { INDEX_op_bswap64_i64, { "r", "0" } }, - { INDEX_op_neg_i64, { "r", "0" } }, - { INDEX_op_not_i64, { "r", "0" } }, - - { INDEX_op_ext8s_i64, { "r", "r" } }, - { INDEX_op_ext16s_i64, { "r", "r" } }, - { INDEX_op_ext32s_i64, { "r", "r" } }, - { INDEX_op_ext8u_i64, { "r", "r" } }, - { INDEX_op_ext16u_i64, { "r", "r" } }, - { INDEX_op_ext32u_i64, { "r", "r" } }, - - { INDEX_op_ext_i32_i64, { "r", "r" } }, - { INDEX_op_extu_i32_i64, { "r", "r" } }, - - { INDEX_op_deposit_i64, { "Q", "0", "Q" } }, - { INDEX_op_movcond_i64, { "r", "r", "re", "r", "0" } }, - - { INDEX_op_mulu2_i64, { "a", "d", "a", "r" } }, - { INDEX_op_muls2_i64, { "a", "d", "a", "r" } }, - { INDEX_op_add2_i64, { "r", "r", "0", "1", "re", "re" } }, - { INDEX_op_sub2_i64, { "r", "r", "0", "1", "re", "re" } }, -#endif - -#if TCG_TARGET_REG_BITS == 64 - { INDEX_op_qemu_ld_i32, { "r", "L" } }, - { INDEX_op_qemu_st_i32, { "L", "L" } }, - { INDEX_op_qemu_ld_i64, { "r", "L" } }, - { INDEX_op_qemu_st_i64, { "L", "L" } }, -#elif TARGET_LONG_BITS <= TCG_TARGET_REG_BITS - { INDEX_op_qemu_ld_i32, { "r", "L" } }, - { INDEX_op_qemu_st_i32, { "L", "L" } }, - { INDEX_op_qemu_ld_i64, { "r", "r", "L" } }, - { INDEX_op_qemu_st_i64, { "L", "L", "L" } }, -#else - { INDEX_op_qemu_ld_i32, { "r", "L", "L" } }, - { INDEX_op_qemu_st_i32, { "L", "L", "L" } }, - { INDEX_op_qemu_ld_i64, { "r", "r", "L", "L" } }, - { INDEX_op_qemu_st_i64, { "L", "L", "L", "L" } }, -#endif - { -1 }, -}; - -static int tcg_target_callee_save_regs[] = { -#if TCG_TARGET_REG_BITS == 64 - TCG_REG_RBP, - TCG_REG_RBX, -#if defined(_WIN64) - TCG_REG_RDI, - TCG_REG_RSI, -#endif - TCG_REG_R12, - TCG_REG_R13, - TCG_REG_R14, /* Currently used for the global env. */ - TCG_REG_R15, -#else - TCG_REG_EBP, /* Currently used for the global env. */ - TCG_REG_EBX, - TCG_REG_ESI, - TCG_REG_EDI, -#endif -}; - -/* Compute frame size via macros, to share between tcg_target_qemu_prologue - and tcg_register_jit. */ - -#define PUSH_SIZE \ - ((1 + ARRAY_SIZE(tcg_target_callee_save_regs)) \ - * (TCG_TARGET_REG_BITS / 8)) - -#define FRAME_SIZE \ - ((PUSH_SIZE \ - + TCG_STATIC_CALL_ARGS_SIZE \ - + CPU_TEMP_BUF_NLONGS * sizeof(long) \ - + TCG_TARGET_STACK_ALIGN - 1) \ - & ~(TCG_TARGET_STACK_ALIGN - 1)) - -/* Generate global QEMU prologue and epilogue code */ -static void tcg_target_qemu_prologue(TCGContext *s) -{ - int i, stack_addend; - - /* TB prologue */ - - /* Reserve some stack space, also for TCG temps. */ - stack_addend = FRAME_SIZE - PUSH_SIZE; - tcg_set_frame(s, TCG_REG_CALL_STACK, TCG_STATIC_CALL_ARGS_SIZE, - CPU_TEMP_BUF_NLONGS * sizeof(long)); - - /* Save all callee saved registers. */ - for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { - tcg_out_push(s, tcg_target_callee_save_regs[i]); - } - -#if TCG_TARGET_REG_BITS == 32 - tcg_out_ld(s, TCG_TYPE_PTR, TCG_AREG0, TCG_REG_ESP, - (ARRAY_SIZE(tcg_target_callee_save_regs) + 1) * 4); - tcg_out_addi(s, TCG_REG_ESP, -stack_addend); - /* jmp *tb. */ - tcg_out_modrm_offset(s, OPC_GRP5, EXT5_JMPN_Ev, TCG_REG_ESP, - (ARRAY_SIZE(tcg_target_callee_save_regs) + 2) * 4 - + stack_addend); -#else - tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); - tcg_out_addi(s, TCG_REG_ESP, -stack_addend); - /* jmp *tb. */ - tcg_out_modrm(s, OPC_GRP5, EXT5_JMPN_Ev, tcg_target_call_iarg_regs[1]); -#endif - - /* TB epilogue */ - tb_ret_addr = s->code_ptr; - - tcg_out_addi(s, TCG_REG_CALL_STACK, stack_addend); - - for (i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) { - tcg_out_pop(s, tcg_target_callee_save_regs[i]); - } - tcg_out_opc(s, OPC_RET, 0, 0, 0); - -#if !defined(CONFIG_SOFTMMU) - /* Try to set up a segment register to point to guest_base. */ - if (guest_base) { - setup_guest_base_seg(); - } -#endif -} - -static void tcg_target_init(TCGContext *s) -{ -#ifdef CONFIG_CPUID_H - unsigned a, b, c, d; - int max = __get_cpuid_max(0, 0); - - if (max >= 1) { - __cpuid(1, a, b, c, d); -#ifndef have_cmov - /* For 32-bit, 99% certainty that we're running on hardware that - supports cmov, but we still need to check. In case cmov is not - available, we'll use a small forward branch. */ - have_cmov = (d & bit_CMOV) != 0; -#endif -#ifndef have_movbe - /* MOVBE is only available on Intel Atom and Haswell CPUs, so we - need to probe for it. */ - have_movbe = (c & bit_MOVBE) != 0; -#endif - } - - if (max >= 7) { - /* BMI1 is available on AMD Piledriver and Intel Haswell CPUs. */ - __cpuid_count(7, 0, a, b, c, d); -#ifdef bit_BMI - have_bmi1 = (b & bit_BMI) != 0; -#endif -#ifndef have_bmi2 - have_bmi2 = (b & bit_BMI2) != 0; -#endif - } -#endif - - if (TCG_TARGET_REG_BITS == 64) { - tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff); - tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffff); - } else { - tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xff); - } - - tcg_regset_clear(tcg_target_call_clobber_regs); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_EAX); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_EDX); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_ECX); - if (TCG_TARGET_REG_BITS == 64) { -#if !defined(_WIN64) - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_RDI); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_RSI); -#endif - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R8); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R9); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R10); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R11); - } - - tcg_regset_clear(s->reserved_regs); - tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK); - - tcg_add_target_add_op_defs(x86_op_defs); -} - -typedef struct { - DebugFrameHeader h; - uint8_t fde_def_cfa[4]; - uint8_t fde_reg_ofs[14]; -} DebugFrame; - -/* We're expecting a 2 byte uleb128 encoded value. */ -QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14)); - -#if !defined(__ELF__) - /* Host machine without ELF. */ -#elif TCG_TARGET_REG_BITS == 64 -#define ELF_HOST_MACHINE EM_X86_64 -static const DebugFrame debug_frame = { - .h.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */ - .h.cie.id = -1, - .h.cie.version = 1, - .h.cie.code_align = 1, - .h.cie.data_align = 0x78, /* sleb128 -8 */ - .h.cie.return_column = 16, - - /* Total FDE size does not include the "len" member. */ - .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), - - .fde_def_cfa = { - 12, 7, /* DW_CFA_def_cfa %rsp, ... */ - (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ - (FRAME_SIZE >> 7) - }, - .fde_reg_ofs = { - 0x90, 1, /* DW_CFA_offset, %rip, -8 */ - /* The following ordering must match tcg_target_callee_save_regs. */ - 0x86, 2, /* DW_CFA_offset, %rbp, -16 */ - 0x83, 3, /* DW_CFA_offset, %rbx, -24 */ - 0x8c, 4, /* DW_CFA_offset, %r12, -32 */ - 0x8d, 5, /* DW_CFA_offset, %r13, -40 */ - 0x8e, 6, /* DW_CFA_offset, %r14, -48 */ - 0x8f, 7, /* DW_CFA_offset, %r15, -56 */ - } -}; -#else -#define ELF_HOST_MACHINE EM_386 -static const DebugFrame debug_frame = { - .h.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */ - .h.cie.id = -1, - .h.cie.version = 1, - .h.cie.code_align = 1, - .h.cie.data_align = 0x7c, /* sleb128 -4 */ - .h.cie.return_column = 8, - - /* Total FDE size does not include the "len" member. */ - .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), - - .fde_def_cfa = { - 12, 4, /* DW_CFA_def_cfa %esp, ... */ - (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ - (FRAME_SIZE >> 7) - }, - .fde_reg_ofs = { - 0x88, 1, /* DW_CFA_offset, %eip, -4 */ - /* The following ordering must match tcg_target_callee_save_regs. */ - 0x85, 2, /* DW_CFA_offset, %ebp, -8 */ - 0x83, 3, /* DW_CFA_offset, %ebx, -12 */ - 0x86, 4, /* DW_CFA_offset, %esi, -16 */ - 0x87, 5, /* DW_CFA_offset, %edi, -20 */ - } -}; -#endif - -#if defined(ELF_HOST_MACHINE) -void tcg_register_jit(void *buf, size_t buf_size) -{ - tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); -} -#endif |