diff options
Diffstat (limited to 'qemu/tcg/s390')
| -rw-r--r-- | qemu/tcg/s390/tcg-target.h | 124 | ||||
| -rw-r--r-- | qemu/tcg/s390/tcg-target.inc.c | 2409 |
2 files changed, 0 insertions, 2533 deletions
diff --git a/qemu/tcg/s390/tcg-target.h b/qemu/tcg/s390/tcg-target.h deleted file mode 100644 index d9dc03873..000000000 --- a/qemu/tcg/s390/tcg-target.h +++ /dev/null @@ -1,124 +0,0 @@ -/* - * Tiny Code Generator for QEMU - * - * Copyright (c) 2009 Ulrich Hecht <uli@suse.de> - * - * 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. - */ -#ifndef TCG_TARGET_S390 -#define TCG_TARGET_S390 1 - -#define TCG_TARGET_INSN_UNIT_SIZE 2 -#define TCG_TARGET_TLB_DISPLACEMENT_BITS 19 - -typedef enum TCGReg { - TCG_REG_R0 = 0, - TCG_REG_R1, - TCG_REG_R2, - TCG_REG_R3, - TCG_REG_R4, - TCG_REG_R5, - TCG_REG_R6, - TCG_REG_R7, - TCG_REG_R8, - TCG_REG_R9, - TCG_REG_R10, - TCG_REG_R11, - TCG_REG_R12, - TCG_REG_R13, - TCG_REG_R14, - TCG_REG_R15 -} TCGReg; - -#define TCG_TARGET_NB_REGS 16 - -/* optional instructions */ -#define TCG_TARGET_HAS_div2_i32 1 -#define TCG_TARGET_HAS_rot_i32 1 -#define TCG_TARGET_HAS_ext8s_i32 1 -#define TCG_TARGET_HAS_ext16s_i32 1 -#define TCG_TARGET_HAS_ext8u_i32 1 -#define TCG_TARGET_HAS_ext16u_i32 1 -#define TCG_TARGET_HAS_bswap16_i32 1 -#define TCG_TARGET_HAS_bswap32_i32 1 -#define TCG_TARGET_HAS_not_i32 0 -#define TCG_TARGET_HAS_neg_i32 1 -#define TCG_TARGET_HAS_andc_i32 0 -#define TCG_TARGET_HAS_orc_i32 0 -#define TCG_TARGET_HAS_eqv_i32 0 -#define TCG_TARGET_HAS_nand_i32 0 -#define TCG_TARGET_HAS_nor_i32 0 -#define TCG_TARGET_HAS_deposit_i32 1 -#define TCG_TARGET_HAS_movcond_i32 1 -#define TCG_TARGET_HAS_add2_i32 1 -#define TCG_TARGET_HAS_sub2_i32 1 -#define TCG_TARGET_HAS_mulu2_i32 0 -#define TCG_TARGET_HAS_muls2_i32 0 -#define TCG_TARGET_HAS_muluh_i32 0 -#define TCG_TARGET_HAS_mulsh_i32 0 -#define TCG_TARGET_HAS_extrl_i64_i32 0 -#define TCG_TARGET_HAS_extrh_i64_i32 0 - -#define TCG_TARGET_HAS_div2_i64 1 -#define TCG_TARGET_HAS_rot_i64 1 -#define TCG_TARGET_HAS_ext8s_i64 1 -#define TCG_TARGET_HAS_ext16s_i64 1 -#define TCG_TARGET_HAS_ext32s_i64 1 -#define TCG_TARGET_HAS_ext8u_i64 1 -#define TCG_TARGET_HAS_ext16u_i64 1 -#define TCG_TARGET_HAS_ext32u_i64 1 -#define TCG_TARGET_HAS_bswap16_i64 1 -#define TCG_TARGET_HAS_bswap32_i64 1 -#define TCG_TARGET_HAS_bswap64_i64 1 -#define TCG_TARGET_HAS_not_i64 0 -#define TCG_TARGET_HAS_neg_i64 1 -#define TCG_TARGET_HAS_andc_i64 0 -#define TCG_TARGET_HAS_orc_i64 0 -#define TCG_TARGET_HAS_eqv_i64 0 -#define TCG_TARGET_HAS_nand_i64 0 -#define TCG_TARGET_HAS_nor_i64 0 -#define TCG_TARGET_HAS_deposit_i64 1 -#define TCG_TARGET_HAS_movcond_i64 1 -#define TCG_TARGET_HAS_add2_i64 1 -#define TCG_TARGET_HAS_sub2_i64 1 -#define TCG_TARGET_HAS_mulu2_i64 1 -#define TCG_TARGET_HAS_muls2_i64 0 -#define TCG_TARGET_HAS_muluh_i64 0 -#define TCG_TARGET_HAS_mulsh_i64 0 - -extern bool tcg_target_deposit_valid(int ofs, int len); -#define TCG_TARGET_deposit_i32_valid tcg_target_deposit_valid -#define TCG_TARGET_deposit_i64_valid tcg_target_deposit_valid - -/* used for function call generation */ -#define TCG_REG_CALL_STACK TCG_REG_R15 -#define TCG_TARGET_STACK_ALIGN 8 -#define TCG_TARGET_CALL_STACK_OFFSET 160 - -#define TCG_TARGET_EXTEND_ARGS 1 - -enum { - TCG_AREG0 = TCG_REG_R10, -}; - -static inline void flush_icache_range(uintptr_t start, uintptr_t stop) -{ -} - -#endif diff --git a/qemu/tcg/s390/tcg-target.inc.c b/qemu/tcg/s390/tcg-target.inc.c deleted file mode 100644 index 580553239..000000000 --- a/qemu/tcg/s390/tcg-target.inc.c +++ /dev/null @@ -1,2409 +0,0 @@ -/* - * Tiny Code Generator for QEMU - * - * Copyright (c) 2009 Ulrich Hecht <uli@suse.de> - * Copyright (c) 2009 Alexander Graf <agraf@suse.de> - * Copyright (c) 2010 Richard Henderson <rth@twiddle.net> - * - * 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" - -/* We only support generating code for 64-bit mode. */ -#if TCG_TARGET_REG_BITS != 64 -#error "unsupported code generation mode" -#endif - -#include "elf.h" - -/* ??? The translation blocks produced by TCG are generally small enough to - be entirely reachable with a 16-bit displacement. Leaving the option for - a 32-bit displacement here Just In Case. */ -#define USE_LONG_BRANCHES 0 - -#define TCG_CT_CONST_MULI 0x100 -#define TCG_CT_CONST_ORI 0x200 -#define TCG_CT_CONST_XORI 0x400 -#define TCG_CT_CONST_CMPI 0x800 -#define TCG_CT_CONST_ADLI 0x1000 - -/* Several places within the instruction set 0 means "no register" - rather than TCG_REG_R0. */ -#define TCG_REG_NONE 0 - -/* A scratch register that may be be used throughout the backend. */ -#define TCG_TMP0 TCG_REG_R14 - -#ifndef CONFIG_SOFTMMU -#define TCG_GUEST_BASE_REG TCG_REG_R13 -#endif - -/* All of the following instructions are prefixed with their instruction - format, and are defined as 8- or 16-bit quantities, even when the two - halves of the 16-bit quantity may appear 32 bits apart in the insn. - This makes it easy to copy the values from the tables in Appendix B. */ -typedef enum S390Opcode { - RIL_AFI = 0xc209, - RIL_AGFI = 0xc208, - RIL_ALFI = 0xc20b, - RIL_ALGFI = 0xc20a, - RIL_BRASL = 0xc005, - RIL_BRCL = 0xc004, - RIL_CFI = 0xc20d, - RIL_CGFI = 0xc20c, - RIL_CLFI = 0xc20f, - RIL_CLGFI = 0xc20e, - RIL_IIHF = 0xc008, - RIL_IILF = 0xc009, - RIL_LARL = 0xc000, - RIL_LGFI = 0xc001, - RIL_LGRL = 0xc408, - RIL_LLIHF = 0xc00e, - RIL_LLILF = 0xc00f, - RIL_LRL = 0xc40d, - RIL_MSFI = 0xc201, - RIL_MSGFI = 0xc200, - RIL_NIHF = 0xc00a, - RIL_NILF = 0xc00b, - RIL_OIHF = 0xc00c, - RIL_OILF = 0xc00d, - RIL_SLFI = 0xc205, - RIL_SLGFI = 0xc204, - RIL_XIHF = 0xc006, - RIL_XILF = 0xc007, - - RI_AGHI = 0xa70b, - RI_AHI = 0xa70a, - RI_BRC = 0xa704, - RI_IIHH = 0xa500, - RI_IIHL = 0xa501, - RI_IILH = 0xa502, - RI_IILL = 0xa503, - RI_LGHI = 0xa709, - RI_LLIHH = 0xa50c, - RI_LLIHL = 0xa50d, - RI_LLILH = 0xa50e, - RI_LLILL = 0xa50f, - RI_MGHI = 0xa70d, - RI_MHI = 0xa70c, - RI_NIHH = 0xa504, - RI_NIHL = 0xa505, - RI_NILH = 0xa506, - RI_NILL = 0xa507, - RI_OIHH = 0xa508, - RI_OIHL = 0xa509, - RI_OILH = 0xa50a, - RI_OILL = 0xa50b, - - RIE_CGIJ = 0xec7c, - RIE_CGRJ = 0xec64, - RIE_CIJ = 0xec7e, - RIE_CLGRJ = 0xec65, - RIE_CLIJ = 0xec7f, - RIE_CLGIJ = 0xec7d, - RIE_CLRJ = 0xec77, - RIE_CRJ = 0xec76, - RIE_RISBG = 0xec55, - - RRE_AGR = 0xb908, - RRE_ALGR = 0xb90a, - RRE_ALCR = 0xb998, - RRE_ALCGR = 0xb988, - RRE_CGR = 0xb920, - RRE_CLGR = 0xb921, - RRE_DLGR = 0xb987, - RRE_DLR = 0xb997, - RRE_DSGFR = 0xb91d, - RRE_DSGR = 0xb90d, - RRE_LGBR = 0xb906, - RRE_LCGR = 0xb903, - RRE_LGFR = 0xb914, - RRE_LGHR = 0xb907, - RRE_LGR = 0xb904, - RRE_LLGCR = 0xb984, - RRE_LLGFR = 0xb916, - RRE_LLGHR = 0xb985, - RRE_LRVR = 0xb91f, - RRE_LRVGR = 0xb90f, - RRE_LTGR = 0xb902, - RRE_MLGR = 0xb986, - RRE_MSGR = 0xb90c, - RRE_MSR = 0xb252, - RRE_NGR = 0xb980, - RRE_OGR = 0xb981, - RRE_SGR = 0xb909, - RRE_SLGR = 0xb90b, - RRE_SLBR = 0xb999, - RRE_SLBGR = 0xb989, - RRE_XGR = 0xb982, - - RRF_LOCR = 0xb9f2, - RRF_LOCGR = 0xb9e2, - - RR_AR = 0x1a, - RR_ALR = 0x1e, - RR_BASR = 0x0d, - RR_BCR = 0x07, - RR_CLR = 0x15, - RR_CR = 0x19, - RR_DR = 0x1d, - RR_LCR = 0x13, - RR_LR = 0x18, - RR_LTR = 0x12, - RR_NR = 0x14, - RR_OR = 0x16, - RR_SR = 0x1b, - RR_SLR = 0x1f, - RR_XR = 0x17, - - RSY_RLL = 0xeb1d, - RSY_RLLG = 0xeb1c, - RSY_SLLG = 0xeb0d, - RSY_SRAG = 0xeb0a, - RSY_SRLG = 0xeb0c, - - RS_SLL = 0x89, - RS_SRA = 0x8a, - RS_SRL = 0x88, - - RXY_AG = 0xe308, - RXY_AY = 0xe35a, - RXY_CG = 0xe320, - RXY_CY = 0xe359, - RXY_LAY = 0xe371, - RXY_LB = 0xe376, - RXY_LG = 0xe304, - RXY_LGB = 0xe377, - RXY_LGF = 0xe314, - RXY_LGH = 0xe315, - RXY_LHY = 0xe378, - RXY_LLGC = 0xe390, - RXY_LLGF = 0xe316, - RXY_LLGH = 0xe391, - RXY_LMG = 0xeb04, - RXY_LRV = 0xe31e, - RXY_LRVG = 0xe30f, - RXY_LRVH = 0xe31f, - RXY_LY = 0xe358, - RXY_STCY = 0xe372, - RXY_STG = 0xe324, - RXY_STHY = 0xe370, - RXY_STMG = 0xeb24, - RXY_STRV = 0xe33e, - RXY_STRVG = 0xe32f, - RXY_STRVH = 0xe33f, - RXY_STY = 0xe350, - - RX_A = 0x5a, - RX_C = 0x59, - RX_L = 0x58, - RX_LA = 0x41, - RX_LH = 0x48, - RX_ST = 0x50, - RX_STC = 0x42, - RX_STH = 0x40, -} S390Opcode; - -#ifdef CONFIG_DEBUG_TCG -static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { - "%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7", - "%r8", "%r9", "%r10" "%r11" "%r12" "%r13" "%r14" "%r15" -}; -#endif - -/* Since R6 is a potential argument register, choose it last of the - call-saved registers. Likewise prefer the call-clobbered registers - in reverse order to maximize the chance of avoiding the arguments. */ -static const int tcg_target_reg_alloc_order[] = { - /* Call saved registers. */ - TCG_REG_R13, - TCG_REG_R12, - TCG_REG_R11, - TCG_REG_R10, - TCG_REG_R9, - TCG_REG_R8, - TCG_REG_R7, - TCG_REG_R6, - /* Call clobbered registers. */ - TCG_REG_R14, - TCG_REG_R0, - TCG_REG_R1, - /* Argument registers, in reverse order of allocation. */ - TCG_REG_R5, - TCG_REG_R4, - TCG_REG_R3, - TCG_REG_R2, -}; - -static const int tcg_target_call_iarg_regs[] = { - TCG_REG_R2, - TCG_REG_R3, - TCG_REG_R4, - TCG_REG_R5, - TCG_REG_R6, -}; - -static const int tcg_target_call_oarg_regs[] = { - TCG_REG_R2, -}; - -#define S390_CC_EQ 8 -#define S390_CC_LT 4 -#define S390_CC_GT 2 -#define S390_CC_OV 1 -#define S390_CC_NE (S390_CC_LT | S390_CC_GT) -#define S390_CC_LE (S390_CC_LT | S390_CC_EQ) -#define S390_CC_GE (S390_CC_GT | S390_CC_EQ) -#define S390_CC_NEVER 0 -#define S390_CC_ALWAYS 15 - -/* Condition codes that result from a COMPARE and COMPARE LOGICAL. */ -static const uint8_t tcg_cond_to_s390_cond[] = { - [TCG_COND_EQ] = S390_CC_EQ, - [TCG_COND_NE] = S390_CC_NE, - [TCG_COND_LT] = S390_CC_LT, - [TCG_COND_LE] = S390_CC_LE, - [TCG_COND_GT] = S390_CC_GT, - [TCG_COND_GE] = S390_CC_GE, - [TCG_COND_LTU] = S390_CC_LT, - [TCG_COND_LEU] = S390_CC_LE, - [TCG_COND_GTU] = S390_CC_GT, - [TCG_COND_GEU] = S390_CC_GE, -}; - -/* Condition codes that result from a LOAD AND TEST. Here, we have no - unsigned instruction variation, however since the test is vs zero we - can re-map the outcomes appropriately. */ -static const uint8_t tcg_cond_to_ltr_cond[] = { - [TCG_COND_EQ] = S390_CC_EQ, - [TCG_COND_NE] = S390_CC_NE, - [TCG_COND_LT] = S390_CC_LT, - [TCG_COND_LE] = S390_CC_LE, - [TCG_COND_GT] = S390_CC_GT, - [TCG_COND_GE] = S390_CC_GE, - [TCG_COND_LTU] = S390_CC_NEVER, - [TCG_COND_LEU] = S390_CC_EQ, - [TCG_COND_GTU] = S390_CC_NE, - [TCG_COND_GEU] = S390_CC_ALWAYS, -}; - -#ifdef CONFIG_SOFTMMU -static void * const qemu_ld_helpers[16] = { - [MO_UB] = helper_ret_ldub_mmu, - [MO_SB] = helper_ret_ldsb_mmu, - [MO_LEUW] = helper_le_lduw_mmu, - [MO_LESW] = helper_le_ldsw_mmu, - [MO_LEUL] = helper_le_ldul_mmu, - [MO_LESL] = helper_le_ldsl_mmu, - [MO_LEQ] = helper_le_ldq_mmu, - [MO_BEUW] = helper_be_lduw_mmu, - [MO_BESW] = helper_be_ldsw_mmu, - [MO_BEUL] = helper_be_ldul_mmu, - [MO_BESL] = helper_be_ldsl_mmu, - [MO_BEQ] = helper_be_ldq_mmu, -}; - -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, -}; -#endif - -static tcg_insn_unit *tb_ret_addr; - -/* A list of relevant facilities used by this translator. Some of these - are required for proper operation, and these are checked at startup. */ - -#define FACILITY_ZARCH_ACTIVE (1ULL << (63 - 2)) -#define FACILITY_LONG_DISP (1ULL << (63 - 18)) -#define FACILITY_EXT_IMM (1ULL << (63 - 21)) -#define FACILITY_GEN_INST_EXT (1ULL << (63 - 34)) -#define FACILITY_LOAD_ON_COND (1ULL << (63 - 45)) - -static uint64_t facilities; - -static void patch_reloc(tcg_insn_unit *code_ptr, int type, - intptr_t value, intptr_t addend) -{ - intptr_t pcrel2 = (tcg_insn_unit *)value - (code_ptr - 1); - tcg_debug_assert(addend == -2); - - switch (type) { - case R_390_PC16DBL: - tcg_debug_assert(pcrel2 == (int16_t)pcrel2); - tcg_patch16(code_ptr, pcrel2); - break; - case R_390_PC32DBL: - tcg_debug_assert(pcrel2 == (int32_t)pcrel2); - tcg_patch32(code_ptr, pcrel2); - break; - default: - tcg_abort(); - break; - } -} - -/* parse target specific constraints */ -static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str) -{ - const char *ct_str = *pct_str; - - switch (ct_str[0]) { - case 'r': /* all registers */ - ct->ct |= TCG_CT_REG; - tcg_regset_set32(ct->u.regs, 0, 0xffff); - break; - case 'R': /* not R0 */ - ct->ct |= TCG_CT_REG; - tcg_regset_set32(ct->u.regs, 0, 0xffff); - tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0); - break; - case 'L': /* qemu_ld/st constraint */ - ct->ct |= TCG_CT_REG; - tcg_regset_set32(ct->u.regs, 0, 0xffff); - tcg_regset_reset_reg (ct->u.regs, TCG_REG_R2); - tcg_regset_reset_reg (ct->u.regs, TCG_REG_R3); - tcg_regset_reset_reg (ct->u.regs, TCG_REG_R4); - break; - case 'a': /* force R2 for division */ - ct->ct |= TCG_CT_REG; - tcg_regset_clear(ct->u.regs); - tcg_regset_set_reg(ct->u.regs, TCG_REG_R2); - break; - case 'b': /* force R3 for division */ - ct->ct |= TCG_CT_REG; - tcg_regset_clear(ct->u.regs); - tcg_regset_set_reg(ct->u.regs, TCG_REG_R3); - break; - case 'A': - ct->ct |= TCG_CT_CONST_ADLI; - break; - case 'K': - ct->ct |= TCG_CT_CONST_MULI; - break; - case 'O': - ct->ct |= TCG_CT_CONST_ORI; - break; - case 'X': - ct->ct |= TCG_CT_CONST_XORI; - break; - case 'C': - ct->ct |= TCG_CT_CONST_CMPI; - break; - default: - return -1; - } - ct_str++; - *pct_str = ct_str; - - return 0; -} - -/* Immediates to be used with logical OR. This is an optimization only, - since a full 64-bit immediate OR can always be performed with 4 sequential - OI[LH][LH] instructions. What we're looking for is immediates that we - can load efficiently, and the immediate load plus the reg-reg OR is - smaller than the sequential OI's. */ - -static int tcg_match_ori(TCGType type, tcg_target_long val) -{ - if (facilities & FACILITY_EXT_IMM) { - if (type == TCG_TYPE_I32) { - /* All 32-bit ORs can be performed with 1 48-bit insn. */ - return 1; - } - } - - /* Look for negative values. These are best to load with LGHI. */ - if (val < 0) { - if (val == (int16_t)val) { - return 0; - } - if (facilities & FACILITY_EXT_IMM) { - if (val == (int32_t)val) { - return 0; - } - } - } - - return 1; -} - -/* Immediates to be used with logical XOR. This is almost, but not quite, - only an optimization. XOR with immediate is only supported with the - extended-immediate facility. That said, there are a few patterns for - which it is better to load the value into a register first. */ - -static int tcg_match_xori(TCGType type, tcg_target_long val) -{ - if ((facilities & FACILITY_EXT_IMM) == 0) { - return 0; - } - - if (type == TCG_TYPE_I32) { - /* All 32-bit XORs can be performed with 1 48-bit insn. */ - return 1; - } - - /* Look for negative values. These are best to load with LGHI. */ - if (val < 0 && val == (int32_t)val) { - return 0; - } - - return 1; -} - -/* Imediates to be used with comparisons. */ - -static int tcg_match_cmpi(TCGType type, tcg_target_long val) -{ - if (facilities & FACILITY_EXT_IMM) { - /* The COMPARE IMMEDIATE instruction is available. */ - if (type == TCG_TYPE_I32) { - /* We have a 32-bit immediate and can compare against anything. */ - return 1; - } else { - /* ??? We have no insight here into whether the comparison is - signed or unsigned. The COMPARE IMMEDIATE insn uses a 32-bit - signed immediate, and the COMPARE LOGICAL IMMEDIATE insn uses - a 32-bit unsigned immediate. If we were to use the (semi) - obvious "val == (int32_t)val" we would be enabling unsigned - comparisons vs very large numbers. The only solution is to - take the intersection of the ranges. */ - /* ??? Another possible solution is to simply lie and allow all - constants here and force the out-of-range values into a temp - register in tgen_cmp when we have knowledge of the actual - comparison code in use. */ - return val >= 0 && val <= 0x7fffffff; - } - } else { - /* Only the LOAD AND TEST instruction is available. */ - return val == 0; - } -} - -/* Immediates to be used with add2/sub2. */ - -static int tcg_match_add2i(TCGType type, tcg_target_long val) -{ - if (facilities & FACILITY_EXT_IMM) { - if (type == TCG_TYPE_I32) { - return 1; - } else if (val >= -0xffffffffll && val <= 0xffffffffll) { - return 1; - } - } - return 0; -} - -/* Test if a constant matches the constraint. */ -static 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 (type == TCG_TYPE_I32) { - val = (int32_t)val; - } - - /* The following are mutually exclusive. */ - if (ct & TCG_CT_CONST_MULI) { - /* Immediates that may be used with multiply. If we have the - general-instruction-extensions, then we have MULTIPLY SINGLE - IMMEDIATE with a signed 32-bit, otherwise we have only - MULTIPLY HALFWORD IMMEDIATE, with a signed 16-bit. */ - if (facilities & FACILITY_GEN_INST_EXT) { - return val == (int32_t)val; - } else { - return val == (int16_t)val; - } - } else if (ct & TCG_CT_CONST_ADLI) { - return tcg_match_add2i(type, val); - } else if (ct & TCG_CT_CONST_ORI) { - return tcg_match_ori(type, val); - } else if (ct & TCG_CT_CONST_XORI) { - return tcg_match_xori(type, val); - } else if (ct & TCG_CT_CONST_CMPI) { - return tcg_match_cmpi(type, val); - } - - return 0; -} - -/* Emit instructions according to the given instruction format. */ - -static void tcg_out_insn_RR(TCGContext *s, S390Opcode op, TCGReg r1, TCGReg r2) -{ - tcg_out16(s, (op << 8) | (r1 << 4) | r2); -} - -static void tcg_out_insn_RRE(TCGContext *s, S390Opcode op, - TCGReg r1, TCGReg r2) -{ - tcg_out32(s, (op << 16) | (r1 << 4) | r2); -} - -static void tcg_out_insn_RRF(TCGContext *s, S390Opcode op, - TCGReg r1, TCGReg r2, int m3) -{ - tcg_out32(s, (op << 16) | (m3 << 12) | (r1 << 4) | r2); -} - -static void tcg_out_insn_RI(TCGContext *s, S390Opcode op, TCGReg r1, int i2) -{ - tcg_out32(s, (op << 16) | (r1 << 20) | (i2 & 0xffff)); -} - -static void tcg_out_insn_RIL(TCGContext *s, S390Opcode op, TCGReg r1, int i2) -{ - tcg_out16(s, op | (r1 << 4)); - tcg_out32(s, i2); -} - -static void tcg_out_insn_RS(TCGContext *s, S390Opcode op, TCGReg r1, - TCGReg b2, TCGReg r3, int disp) -{ - tcg_out32(s, (op << 24) | (r1 << 20) | (r3 << 16) | (b2 << 12) - | (disp & 0xfff)); -} - -static void tcg_out_insn_RSY(TCGContext *s, S390Opcode op, TCGReg r1, - TCGReg b2, TCGReg r3, int disp) -{ - tcg_out16(s, (op & 0xff00) | (r1 << 4) | r3); - tcg_out32(s, (op & 0xff) | (b2 << 28) - | ((disp & 0xfff) << 16) | ((disp & 0xff000) >> 4)); -} - -#define tcg_out_insn_RX tcg_out_insn_RS -#define tcg_out_insn_RXY tcg_out_insn_RSY - -/* Emit an opcode with "type-checking" of the format. */ -#define tcg_out_insn(S, FMT, OP, ...) \ - glue(tcg_out_insn_,FMT)(S, glue(glue(FMT,_),OP), ## __VA_ARGS__) - - -/* emit 64-bit shifts */ -static void tcg_out_sh64(TCGContext* s, S390Opcode op, TCGReg dest, - TCGReg src, TCGReg sh_reg, int sh_imm) -{ - tcg_out_insn_RSY(s, op, dest, sh_reg, src, sh_imm); -} - -/* emit 32-bit shifts */ -static void tcg_out_sh32(TCGContext* s, S390Opcode op, TCGReg dest, - TCGReg sh_reg, int sh_imm) -{ - tcg_out_insn_RS(s, op, dest, sh_reg, 0, sh_imm); -} - -static void tcg_out_mov(TCGContext *s, TCGType type, TCGReg dst, TCGReg src) -{ - if (src != dst) { - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RR, LR, dst, src); - } else { - tcg_out_insn(s, RRE, LGR, dst, src); - } - } -} - -/* load a register with an immediate value */ -static void tcg_out_movi(TCGContext *s, TCGType type, - TCGReg ret, tcg_target_long sval) -{ - static const S390Opcode lli_insns[4] = { - RI_LLILL, RI_LLILH, RI_LLIHL, RI_LLIHH - }; - - tcg_target_ulong uval = sval; - int i; - - if (type == TCG_TYPE_I32) { - uval = (uint32_t)sval; - sval = (int32_t)sval; - } - - /* Try all 32-bit insns that can load it in one go. */ - if (sval >= -0x8000 && sval < 0x8000) { - tcg_out_insn(s, RI, LGHI, ret, sval); - return; - } - - for (i = 0; i < 4; i++) { - tcg_target_long mask = 0xffffull << i*16; - if ((uval & mask) == uval) { - tcg_out_insn_RI(s, lli_insns[i], ret, uval >> i*16); - return; - } - } - - /* Try all 48-bit insns that can load it in one go. */ - if (facilities & FACILITY_EXT_IMM) { - if (sval == (int32_t)sval) { - tcg_out_insn(s, RIL, LGFI, ret, sval); - return; - } - if (uval <= 0xffffffff) { - tcg_out_insn(s, RIL, LLILF, ret, uval); - return; - } - if ((uval & 0xffffffff) == 0) { - tcg_out_insn(s, RIL, LLIHF, ret, uval >> 31 >> 1); - return; - } - } - - /* Try for PC-relative address load. */ - if ((sval & 1) == 0) { - ptrdiff_t off = tcg_pcrel_diff(s, (void *)sval) >> 1; - if (off == (int32_t)off) { - tcg_out_insn(s, RIL, LARL, ret, off); - return; - } - } - - /* If extended immediates are not present, then we may have to issue - several instructions to load the low 32 bits. */ - if (!(facilities & FACILITY_EXT_IMM)) { - /* A 32-bit unsigned value can be loaded in 2 insns. And given - that the lli_insns loop above did not succeed, we know that - both insns are required. */ - if (uval <= 0xffffffff) { - tcg_out_insn(s, RI, LLILL, ret, uval); - tcg_out_insn(s, RI, IILH, ret, uval >> 16); - return; - } - - /* If all high bits are set, the value can be loaded in 2 or 3 insns. - We first want to make sure that all the high bits get set. With - luck the low 16-bits can be considered negative to perform that for - free, otherwise we load an explicit -1. */ - if (sval >> 31 >> 1 == -1) { - if (uval & 0x8000) { - tcg_out_insn(s, RI, LGHI, ret, uval); - } else { - tcg_out_insn(s, RI, LGHI, ret, -1); - tcg_out_insn(s, RI, IILL, ret, uval); - } - tcg_out_insn(s, RI, IILH, ret, uval >> 16); - return; - } - } - - /* If we get here, both the high and low parts have non-zero bits. */ - - /* Recurse to load the lower 32-bits. */ - tcg_out_movi(s, TCG_TYPE_I64, ret, uval & 0xffffffff); - - /* Insert data into the high 32-bits. */ - uval = uval >> 31 >> 1; - if (facilities & FACILITY_EXT_IMM) { - if (uval < 0x10000) { - tcg_out_insn(s, RI, IIHL, ret, uval); - } else if ((uval & 0xffff) == 0) { - tcg_out_insn(s, RI, IIHH, ret, uval >> 16); - } else { - tcg_out_insn(s, RIL, IIHF, ret, uval); - } - } else { - if (uval & 0xffff) { - tcg_out_insn(s, RI, IIHL, ret, uval); - } - if (uval & 0xffff0000) { - tcg_out_insn(s, RI, IIHH, ret, uval >> 16); - } - } -} - - -/* Emit a load/store type instruction. Inputs are: - DATA: The register to be loaded or stored. - BASE+OFS: The effective address. - OPC_RX: If the operation has an RX format opcode (e.g. STC), otherwise 0. - OPC_RXY: The RXY format opcode for the operation (e.g. STCY). */ - -static void tcg_out_mem(TCGContext *s, S390Opcode opc_rx, S390Opcode opc_rxy, - TCGReg data, TCGReg base, TCGReg index, - tcg_target_long ofs) -{ - if (ofs < -0x80000 || ofs >= 0x80000) { - /* Combine the low 20 bits of the offset with the actual load insn; - the high 44 bits must come from an immediate load. */ - tcg_target_long low = ((ofs & 0xfffff) ^ 0x80000) - 0x80000; - tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, ofs - low); - ofs = low; - - /* If we were already given an index register, add it in. */ - if (index != TCG_REG_NONE) { - tcg_out_insn(s, RRE, AGR, TCG_TMP0, index); - } - index = TCG_TMP0; - } - - if (opc_rx && ofs >= 0 && ofs < 0x1000) { - tcg_out_insn_RX(s, opc_rx, data, base, index, ofs); - } else { - tcg_out_insn_RXY(s, opc_rxy, data, base, index, ofs); - } -} - - -/* load data without address translation or endianness conversion */ -static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg data, - TCGReg base, intptr_t ofs) -{ - if (type == TCG_TYPE_I32) { - tcg_out_mem(s, RX_L, RXY_LY, data, base, TCG_REG_NONE, ofs); - } else { - tcg_out_mem(s, 0, RXY_LG, data, base, TCG_REG_NONE, ofs); - } -} - -static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg data, - TCGReg base, intptr_t ofs) -{ - if (type == TCG_TYPE_I32) { - tcg_out_mem(s, RX_ST, RXY_STY, data, base, TCG_REG_NONE, ofs); - } else { - tcg_out_mem(s, 0, RXY_STG, data, base, TCG_REG_NONE, ofs); - } -} - -/* load data from an absolute host address */ -static void tcg_out_ld_abs(TCGContext *s, TCGType type, TCGReg dest, void *abs) -{ - intptr_t addr = (intptr_t)abs; - - if ((facilities & FACILITY_GEN_INST_EXT) && !(addr & 1)) { - ptrdiff_t disp = tcg_pcrel_diff(s, abs) >> 1; - if (disp == (int32_t)disp) { - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RIL, LRL, dest, disp); - } else { - tcg_out_insn(s, RIL, LGRL, dest, disp); - } - return; - } - } - - tcg_out_movi(s, TCG_TYPE_PTR, dest, addr & ~0xffff); - tcg_out_ld(s, type, dest, dest, addr & 0xffff); -} - -static inline void tcg_out_risbg(TCGContext *s, TCGReg dest, TCGReg src, - int msb, int lsb, int ofs, int z) -{ - /* Format RIE-f */ - tcg_out16(s, (RIE_RISBG & 0xff00) | (dest << 4) | src); - tcg_out16(s, (msb << 8) | (z << 7) | lsb); - tcg_out16(s, (ofs << 8) | (RIE_RISBG & 0xff)); -} - -static void tgen_ext8s(TCGContext *s, TCGType type, TCGReg dest, TCGReg src) -{ - if (facilities & FACILITY_EXT_IMM) { - tcg_out_insn(s, RRE, LGBR, dest, src); - return; - } - - if (type == TCG_TYPE_I32) { - if (dest == src) { - tcg_out_sh32(s, RS_SLL, dest, TCG_REG_NONE, 24); - } else { - tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 24); - } - tcg_out_sh32(s, RS_SRA, dest, TCG_REG_NONE, 24); - } else { - tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 56); - tcg_out_sh64(s, RSY_SRAG, dest, dest, TCG_REG_NONE, 56); - } -} - -static void tgen_ext8u(TCGContext *s, TCGType type, TCGReg dest, TCGReg src) -{ - if (facilities & FACILITY_EXT_IMM) { - tcg_out_insn(s, RRE, LLGCR, dest, src); - return; - } - - if (dest == src) { - tcg_out_movi(s, type, TCG_TMP0, 0xff); - src = TCG_TMP0; - } else { - tcg_out_movi(s, type, dest, 0xff); - } - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RR, NR, dest, src); - } else { - tcg_out_insn(s, RRE, NGR, dest, src); - } -} - -static void tgen_ext16s(TCGContext *s, TCGType type, TCGReg dest, TCGReg src) -{ - if (facilities & FACILITY_EXT_IMM) { - tcg_out_insn(s, RRE, LGHR, dest, src); - return; - } - - if (type == TCG_TYPE_I32) { - if (dest == src) { - tcg_out_sh32(s, RS_SLL, dest, TCG_REG_NONE, 16); - } else { - tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 16); - } - tcg_out_sh32(s, RS_SRA, dest, TCG_REG_NONE, 16); - } else { - tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 48); - tcg_out_sh64(s, RSY_SRAG, dest, dest, TCG_REG_NONE, 48); - } -} - -static void tgen_ext16u(TCGContext *s, TCGType type, TCGReg dest, TCGReg src) -{ - if (facilities & FACILITY_EXT_IMM) { - tcg_out_insn(s, RRE, LLGHR, dest, src); - return; - } - - if (dest == src) { - tcg_out_movi(s, type, TCG_TMP0, 0xffff); - src = TCG_TMP0; - } else { - tcg_out_movi(s, type, dest, 0xffff); - } - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RR, NR, dest, src); - } else { - tcg_out_insn(s, RRE, NGR, dest, src); - } -} - -static inline void tgen_ext32s(TCGContext *s, TCGReg dest, TCGReg src) -{ - tcg_out_insn(s, RRE, LGFR, dest, src); -} - -static inline void tgen_ext32u(TCGContext *s, TCGReg dest, TCGReg src) -{ - tcg_out_insn(s, RRE, LLGFR, dest, src); -} - -/* Accept bit patterns like these: - 0....01....1 - 1....10....0 - 1..10..01..1 - 0..01..10..0 - Copied from gcc sources. */ -static inline bool risbg_mask(uint64_t c) -{ - uint64_t lsb; - /* We don't change the number of transitions by inverting, - so make sure we start with the LSB zero. */ - if (c & 1) { - c = ~c; - } - /* Reject all zeros or all ones. */ - if (c == 0) { - return false; - } - /* Find the first transition. */ - lsb = c & -c; - /* Invert to look for a second transition. */ - c = ~c; - /* Erase the first transition. */ - c &= -lsb; - /* Find the second transition, if any. */ - lsb = c & -c; - /* Match if all the bits are 1's, or if c is zero. */ - return c == -lsb; -} - -static void tgen_andi_risbg(TCGContext *s, TCGReg out, TCGReg in, uint64_t val) -{ - int msb, lsb; - if ((val & 0x8000000000000001ull) == 0x8000000000000001ull) { - /* Achieve wraparound by swapping msb and lsb. */ - msb = 64 - ctz64(~val); - lsb = clz64(~val) - 1; - } else { - msb = clz64(val); - lsb = 63 - ctz64(val); - } - tcg_out_risbg(s, out, in, msb, lsb, 0, 1); -} - -static void tgen_andi(TCGContext *s, TCGType type, TCGReg dest, uint64_t val) -{ - static const S390Opcode ni_insns[4] = { - RI_NILL, RI_NILH, RI_NIHL, RI_NIHH - }; - static const S390Opcode nif_insns[2] = { - RIL_NILF, RIL_NIHF - }; - uint64_t valid = (type == TCG_TYPE_I32 ? 0xffffffffull : -1ull); - int i; - - /* Look for the zero-extensions. */ - if ((val & valid) == 0xffffffff) { - tgen_ext32u(s, dest, dest); - return; - } - if (facilities & FACILITY_EXT_IMM) { - if ((val & valid) == 0xff) { - tgen_ext8u(s, TCG_TYPE_I64, dest, dest); - return; - } - if ((val & valid) == 0xffff) { - tgen_ext16u(s, TCG_TYPE_I64, dest, dest); - return; - } - } - - /* Try all 32-bit insns that can perform it in one go. */ - for (i = 0; i < 4; i++) { - tcg_target_ulong mask = ~(0xffffull << i*16); - if (((val | ~valid) & mask) == mask) { - tcg_out_insn_RI(s, ni_insns[i], dest, val >> i*16); - return; - } - } - - /* Try all 48-bit insns that can perform it in one go. */ - if (facilities & FACILITY_EXT_IMM) { - for (i = 0; i < 2; i++) { - tcg_target_ulong mask = ~(0xffffffffull << i*32); - if (((val | ~valid) & mask) == mask) { - tcg_out_insn_RIL(s, nif_insns[i], dest, val >> i*32); - return; - } - } - } - if ((facilities & FACILITY_GEN_INST_EXT) && risbg_mask(val)) { - tgen_andi_risbg(s, dest, dest, val); - return; - } - - /* Fall back to loading the constant. */ - tcg_out_movi(s, type, TCG_TMP0, val); - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RR, NR, dest, TCG_TMP0); - } else { - tcg_out_insn(s, RRE, NGR, dest, TCG_TMP0); - } -} - -static void tgen64_ori(TCGContext *s, TCGReg dest, tcg_target_ulong val) -{ - static const S390Opcode oi_insns[4] = { - RI_OILL, RI_OILH, RI_OIHL, RI_OIHH - }; - static const S390Opcode nif_insns[2] = { - RIL_OILF, RIL_OIHF - }; - - int i; - - /* Look for no-op. */ - if (val == 0) { - return; - } - - if (facilities & FACILITY_EXT_IMM) { - /* Try all 32-bit insns that can perform it in one go. */ - for (i = 0; i < 4; i++) { - tcg_target_ulong mask = (0xffffull << i*16); - if ((val & mask) != 0 && (val & ~mask) == 0) { - tcg_out_insn_RI(s, oi_insns[i], dest, val >> i*16); - return; - } - } - - /* Try all 48-bit insns that can perform it in one go. */ - for (i = 0; i < 2; i++) { - tcg_target_ulong mask = (0xffffffffull << i*32); - if ((val & mask) != 0 && (val & ~mask) == 0) { - tcg_out_insn_RIL(s, nif_insns[i], dest, val >> i*32); - return; - } - } - - /* Perform the OR via sequential modifications to the high and - low parts. Do this via recursion to handle 16-bit vs 32-bit - masks in each half. */ - tgen64_ori(s, dest, val & 0x00000000ffffffffull); - tgen64_ori(s, dest, val & 0xffffffff00000000ull); - } else { - /* With no extended-immediate facility, we don't need to be so - clever. Just iterate over the insns and mask in the constant. */ - for (i = 0; i < 4; i++) { - tcg_target_ulong mask = (0xffffull << i*16); - if ((val & mask) != 0) { - tcg_out_insn_RI(s, oi_insns[i], dest, val >> i*16); - } - } - } -} - -static void tgen64_xori(TCGContext *s, TCGReg dest, tcg_target_ulong val) -{ - /* Perform the xor by parts. */ - if (val & 0xffffffff) { - tcg_out_insn(s, RIL, XILF, dest, val); - } - if (val > 0xffffffff) { - tcg_out_insn(s, RIL, XIHF, dest, val >> 31 >> 1); - } -} - -static int tgen_cmp(TCGContext *s, TCGType type, TCGCond c, TCGReg r1, - TCGArg c2, int c2const) -{ - bool is_unsigned = is_unsigned_cond(c); - if (c2const) { - if (c2 == 0) { - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RR, LTR, r1, r1); - } else { - tcg_out_insn(s, RRE, LTGR, r1, r1); - } - return tcg_cond_to_ltr_cond[c]; - } else { - if (is_unsigned) { - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RIL, CLFI, r1, c2); - } else { - tcg_out_insn(s, RIL, CLGFI, r1, c2); - } - } else { - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RIL, CFI, r1, c2); - } else { - tcg_out_insn(s, RIL, CGFI, r1, c2); - } - } - } - } else { - if (is_unsigned) { - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RR, CLR, r1, c2); - } else { - tcg_out_insn(s, RRE, CLGR, r1, c2); - } - } else { - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RR, CR, r1, c2); - } else { - tcg_out_insn(s, RRE, CGR, r1, c2); - } - } - } - return tcg_cond_to_s390_cond[c]; -} - -static void tgen_setcond(TCGContext *s, TCGType type, TCGCond cond, - TCGReg dest, TCGReg c1, TCGArg c2, int c2const) -{ - int cc; - - switch (cond) { - case TCG_COND_GTU: - case TCG_COND_GT: - do_greater: - /* The result of a compare has CC=2 for GT and CC=3 unused. - ADD LOGICAL WITH CARRY considers (CC & 2) the carry bit. */ - tgen_cmp(s, type, cond, c1, c2, c2const); - tcg_out_movi(s, type, dest, 0); - tcg_out_insn(s, RRE, ALCGR, dest, dest); - return; - - case TCG_COND_GEU: - do_geu: - /* We need "real" carry semantics, so use SUBTRACT LOGICAL - instead of COMPARE LOGICAL. This needs an extra move. */ - tcg_out_mov(s, type, TCG_TMP0, c1); - if (c2const) { - tcg_out_movi(s, TCG_TYPE_I64, dest, 0); - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RIL, SLFI, TCG_TMP0, c2); - } else { - tcg_out_insn(s, RIL, SLGFI, TCG_TMP0, c2); - } - } else { - if (type == TCG_TYPE_I32) { - tcg_out_insn(s, RR, SLR, TCG_TMP0, c2); - } else { - tcg_out_insn(s, RRE, SLGR, TCG_TMP0, c2); - } - tcg_out_movi(s, TCG_TYPE_I64, dest, 0); - } - tcg_out_insn(s, RRE, ALCGR, dest, dest); - return; - - case TCG_COND_LEU: - case TCG_COND_LTU: - case TCG_COND_LT: - /* Swap operands so that we can use GEU/GTU/GT. */ - if (c2const) { - tcg_out_movi(s, type, TCG_TMP0, c2); - c2 = c1; - c2const = 0; - c1 = TCG_TMP0; - } else { - TCGReg t = c1; - c1 = c2; - c2 = t; - } - if (cond == TCG_COND_LEU) { - goto do_geu; - } - cond = tcg_swap_cond(cond); - goto do_greater; - - case TCG_COND_NE: - /* X != 0 is X > 0. */ - if (c2const && c2 == 0) { - cond = TCG_COND_GTU; - goto do_greater; - } - break; - - case TCG_COND_EQ: - /* X == 0 is X <= 0 is 0 >= X. */ - if (c2const && c2 == 0) { - tcg_out_movi(s, TCG_TYPE_I64, TCG_TMP0, 0); - c2 = c1; - c2const = 0; - c1 = TCG_TMP0; - goto do_geu; - } - break; - - default: - break; - } - - cc = tgen_cmp(s, type, cond, c1, c2, c2const); - if (facilities & FACILITY_LOAD_ON_COND) { - /* Emit: d = 0, t = 1, d = (cc ? t : d). */ - tcg_out_movi(s, TCG_TYPE_I64, dest, 0); - tcg_out_movi(s, TCG_TYPE_I64, TCG_TMP0, 1); - tcg_out_insn(s, RRF, LOCGR, dest, TCG_TMP0, cc); - } else { - /* Emit: d = 1; if (cc) goto over; d = 0; over: */ - tcg_out_movi(s, type, dest, 1); - tcg_out_insn(s, RI, BRC, cc, (4 + 4) >> 1); - tcg_out_movi(s, type, dest, 0); - } -} - -static void tgen_movcond(TCGContext *s, TCGType type, TCGCond c, TCGReg dest, - TCGReg c1, TCGArg c2, int c2const, TCGReg r3) -{ - int cc; - if (facilities & FACILITY_LOAD_ON_COND) { - cc = tgen_cmp(s, type, c, c1, c2, c2const); - tcg_out_insn(s, RRF, LOCGR, dest, r3, cc); - } else { - c = tcg_invert_cond(c); - cc = tgen_cmp(s, type, c, c1, c2, c2const); - - /* Emit: if (cc) goto over; dest = r3; over: */ - tcg_out_insn(s, RI, BRC, cc, (4 + 4) >> 1); - tcg_out_insn(s, RRE, LGR, dest, r3); - } -} - -bool tcg_target_deposit_valid(int ofs, int len) -{ - return (facilities & FACILITY_GEN_INST_EXT) != 0; -} - -static void tgen_deposit(TCGContext *s, TCGReg dest, TCGReg src, - int ofs, int len) -{ - int lsb = (63 - ofs); - int msb = lsb - (len - 1); - tcg_out_risbg(s, dest, src, msb, lsb, ofs, 0); -} - -static void tgen_gotoi(TCGContext *s, int cc, tcg_insn_unit *dest) -{ - ptrdiff_t off = dest - s->code_ptr; - if (off == (int16_t)off) { - tcg_out_insn(s, RI, BRC, cc, off); - } else if (off == (int32_t)off) { - tcg_out_insn(s, RIL, BRCL, cc, off); - } else { - tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, (uintptr_t)dest); - tcg_out_insn(s, RR, BCR, cc, TCG_TMP0); - } -} - -static void tgen_branch(TCGContext *s, int cc, TCGLabel *l) -{ - if (l->has_value) { - tgen_gotoi(s, cc, l->u.value_ptr); - } else if (USE_LONG_BRANCHES) { - tcg_out16(s, RIL_BRCL | (cc << 4)); - tcg_out_reloc(s, s->code_ptr, R_390_PC32DBL, l, -2); - s->code_ptr += 2; - } else { - tcg_out16(s, RI_BRC | (cc << 4)); - tcg_out_reloc(s, s->code_ptr, R_390_PC16DBL, l, -2); - s->code_ptr += 1; - } -} - -static void tgen_compare_branch(TCGContext *s, S390Opcode opc, int cc, - TCGReg r1, TCGReg r2, TCGLabel *l) -{ - intptr_t off; - - if (l->has_value) { - off = l->u.value_ptr - s->code_ptr; - } else { - /* We need to keep the offset unchanged for retranslation. */ - off = s->code_ptr[1]; - tcg_out_reloc(s, s->code_ptr + 1, R_390_PC16DBL, l, -2); - } - - tcg_out16(s, (opc & 0xff00) | (r1 << 4) | r2); - tcg_out16(s, off); - tcg_out16(s, cc << 12 | (opc & 0xff)); -} - -static void tgen_compare_imm_branch(TCGContext *s, S390Opcode opc, int cc, - TCGReg r1, int i2, TCGLabel *l) -{ - tcg_target_long off; - - if (l->has_value) { - off = l->u.value_ptr - s->code_ptr; - } else { - /* We need to keep the offset unchanged for retranslation. */ - off = s->code_ptr[1]; - tcg_out_reloc(s, s->code_ptr + 1, R_390_PC16DBL, l, -2); - } - - tcg_out16(s, (opc & 0xff00) | (r1 << 4) | cc); - tcg_out16(s, off); - tcg_out16(s, (i2 << 8) | (opc & 0xff)); -} - -static void tgen_brcond(TCGContext *s, TCGType type, TCGCond c, - TCGReg r1, TCGArg c2, int c2const, TCGLabel *l) -{ - int cc; - - if (facilities & FACILITY_GEN_INST_EXT) { - bool is_unsigned = is_unsigned_cond(c); - bool in_range; - S390Opcode opc; - - cc = tcg_cond_to_s390_cond[c]; - - if (!c2const) { - opc = (type == TCG_TYPE_I32 - ? (is_unsigned ? RIE_CLRJ : RIE_CRJ) - : (is_unsigned ? RIE_CLGRJ : RIE_CGRJ)); - tgen_compare_branch(s, opc, cc, r1, c2, l); - return; - } - - /* COMPARE IMMEDIATE AND BRANCH RELATIVE has an 8-bit immediate field. - If the immediate we've been given does not fit that range, we'll - fall back to separate compare and branch instructions using the - larger comparison range afforded by COMPARE IMMEDIATE. */ - if (type == TCG_TYPE_I32) { - if (is_unsigned) { - opc = RIE_CLIJ; - in_range = (uint32_t)c2 == (uint8_t)c2; - } else { - opc = RIE_CIJ; - in_range = (int32_t)c2 == (int8_t)c2; - } - } else { - if (is_unsigned) { - opc = RIE_CLGIJ; - in_range = (uint64_t)c2 == (uint8_t)c2; - } else { - opc = RIE_CGIJ; - in_range = (int64_t)c2 == (int8_t)c2; - } - } - if (in_range) { - tgen_compare_imm_branch(s, opc, cc, r1, c2, l); - return; - } - } - - cc = tgen_cmp(s, type, c, r1, c2, c2const); - tgen_branch(s, cc, l); -} - -static void tcg_out_call(TCGContext *s, tcg_insn_unit *dest) -{ - ptrdiff_t off = dest - s->code_ptr; - if (off == (int32_t)off) { - tcg_out_insn(s, RIL, BRASL, TCG_REG_R14, off); - } else { - tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, (uintptr_t)dest); - tcg_out_insn(s, RR, BASR, TCG_REG_R14, TCG_TMP0); - } -} - -static void tcg_out_qemu_ld_direct(TCGContext *s, TCGMemOp opc, TCGReg data, - TCGReg base, TCGReg index, int disp) -{ - switch (opc & (MO_SSIZE | MO_BSWAP)) { - case MO_UB: - tcg_out_insn(s, RXY, LLGC, data, base, index, disp); - break; - case MO_SB: - tcg_out_insn(s, RXY, LGB, data, base, index, disp); - break; - - case MO_UW | MO_BSWAP: - /* swapped unsigned halfword load with upper bits zeroed */ - tcg_out_insn(s, RXY, LRVH, data, base, index, disp); - tgen_ext16u(s, TCG_TYPE_I64, data, data); - break; - case MO_UW: - tcg_out_insn(s, RXY, LLGH, data, base, index, disp); - break; - - case MO_SW | MO_BSWAP: - /* swapped sign-extended halfword load */ - tcg_out_insn(s, RXY, LRVH, data, base, index, disp); - tgen_ext16s(s, TCG_TYPE_I64, data, data); - break; - case MO_SW: - tcg_out_insn(s, RXY, LGH, data, base, index, disp); - break; - - case MO_UL | MO_BSWAP: - /* swapped unsigned int load with upper bits zeroed */ - tcg_out_insn(s, RXY, LRV, data, base, index, disp); - tgen_ext32u(s, data, data); - break; - case MO_UL: - tcg_out_insn(s, RXY, LLGF, data, base, index, disp); - break; - - case MO_SL | MO_BSWAP: - /* swapped sign-extended int load */ - tcg_out_insn(s, RXY, LRV, data, base, index, disp); - tgen_ext32s(s, data, data); - break; - case MO_SL: - tcg_out_insn(s, RXY, LGF, data, base, index, disp); - break; - - case MO_Q | MO_BSWAP: - tcg_out_insn(s, RXY, LRVG, data, base, index, disp); - break; - case MO_Q: - tcg_out_insn(s, RXY, LG, data, base, index, disp); - break; - - default: - tcg_abort(); - } -} - -static void tcg_out_qemu_st_direct(TCGContext *s, TCGMemOp opc, TCGReg data, - TCGReg base, TCGReg index, int disp) -{ - switch (opc & (MO_SIZE | MO_BSWAP)) { - case MO_UB: - if (disp >= 0 && disp < 0x1000) { - tcg_out_insn(s, RX, STC, data, base, index, disp); - } else { - tcg_out_insn(s, RXY, STCY, data, base, index, disp); - } - break; - - case MO_UW | MO_BSWAP: - tcg_out_insn(s, RXY, STRVH, data, base, index, disp); - break; - case MO_UW: - if (disp >= 0 && disp < 0x1000) { - tcg_out_insn(s, RX, STH, data, base, index, disp); - } else { - tcg_out_insn(s, RXY, STHY, data, base, index, disp); - } - break; - - case MO_UL | MO_BSWAP: - tcg_out_insn(s, RXY, STRV, data, base, index, disp); - break; - case MO_UL: - if (disp >= 0 && disp < 0x1000) { - tcg_out_insn(s, RX, ST, data, base, index, disp); - } else { - tcg_out_insn(s, RXY, STY, data, base, index, disp); - } - break; - - case MO_Q | MO_BSWAP: - tcg_out_insn(s, RXY, STRVG, data, base, index, disp); - break; - case MO_Q: - tcg_out_insn(s, RXY, STG, data, base, index, disp); - break; - - default: - tcg_abort(); - } -} - -#if defined(CONFIG_SOFTMMU) -/* We're expecting to use a 20-bit signed offset on the tlb memory ops. - Using the offset of the second entry in the last tlb table ensures - that we can index all of the elements of the first entry. */ -QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_table[NB_MMU_MODES - 1][1]) - > 0x7ffff); - -/* Load and compare a TLB entry, leaving the flags set. Loads the TLB - addend into R2. Returns a register with the santitized guest address. */ -static TCGReg tcg_out_tlb_read(TCGContext* s, TCGReg addr_reg, TCGMemOp opc, - int mem_index, bool is_ld) -{ - int s_mask = (1 << (opc & MO_SIZE)) - 1; - int ofs, a_off; - uint64_t tlb_mask; - - /* For aligned accesses, we check the first byte and include the alignment - bits within the address. For unaligned access, we check that we don't - cross pages using the address of the last byte of the access. */ - if ((opc & MO_AMASK) == MO_ALIGN || s_mask == 0) { - a_off = 0; - tlb_mask = TARGET_PAGE_MASK | s_mask; - } else { - a_off = s_mask; - tlb_mask = TARGET_PAGE_MASK; - } - - if (facilities & FACILITY_GEN_INST_EXT) { - tcg_out_risbg(s, TCG_REG_R2, addr_reg, - 64 - CPU_TLB_BITS - CPU_TLB_ENTRY_BITS, - 63 - CPU_TLB_ENTRY_BITS, - 64 + CPU_TLB_ENTRY_BITS - TARGET_PAGE_BITS, 1); - if (a_off) { - tcg_out_insn(s, RX, LA, TCG_REG_R3, addr_reg, TCG_REG_NONE, a_off); - tgen_andi(s, TCG_TYPE_TL, TCG_REG_R3, tlb_mask); - } else { - tgen_andi_risbg(s, TCG_REG_R3, addr_reg, tlb_mask); - } - } else { - tcg_out_sh64(s, RSY_SRLG, TCG_REG_R2, addr_reg, TCG_REG_NONE, - TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); - tcg_out_insn(s, RX, LA, TCG_REG_R3, addr_reg, TCG_REG_NONE, a_off); - tgen_andi(s, TCG_TYPE_I64, TCG_REG_R2, - (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS); - tgen_andi(s, TCG_TYPE_TL, TCG_REG_R3, tlb_mask); - } - - if (is_ld) { - ofs = offsetof(CPUArchState, tlb_table[mem_index][0].addr_read); - } else { - ofs = offsetof(CPUArchState, tlb_table[mem_index][0].addr_write); - } - if (TARGET_LONG_BITS == 32) { - tcg_out_mem(s, RX_C, RXY_CY, TCG_REG_R3, TCG_REG_R2, TCG_AREG0, ofs); - } else { - tcg_out_mem(s, 0, RXY_CG, TCG_REG_R3, TCG_REG_R2, TCG_AREG0, ofs); - } - - ofs = offsetof(CPUArchState, tlb_table[mem_index][0].addend); - tcg_out_mem(s, 0, RXY_LG, TCG_REG_R2, TCG_REG_R2, TCG_AREG0, ofs); - - if (TARGET_LONG_BITS == 32) { - tgen_ext32u(s, TCG_REG_R3, addr_reg); - return TCG_REG_R3; - } - return addr_reg; -} - -static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi, - TCGReg data, TCGReg addr, - 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 = data; - label->addrlo_reg = addr; - label->raddr = raddr; - label->label_ptr[0] = label_ptr; -} - -static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) -{ - TCGReg addr_reg = lb->addrlo_reg; - TCGReg data_reg = lb->datalo_reg; - TCGMemOpIdx oi = lb->oi; - TCGMemOp opc = get_memop(oi); - - patch_reloc(lb->label_ptr[0], R_390_PC16DBL, (intptr_t)s->code_ptr, -2); - - tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_AREG0); - if (TARGET_LONG_BITS == 64) { - tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R3, addr_reg); - } - tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R4, oi); - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R5, (uintptr_t)lb->raddr); - tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)]); - tcg_out_mov(s, TCG_TYPE_I64, data_reg, TCG_REG_R2); - - tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr); -} - -static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) -{ - TCGReg addr_reg = lb->addrlo_reg; - TCGReg data_reg = lb->datalo_reg; - TCGMemOpIdx oi = lb->oi; - TCGMemOp opc = get_memop(oi); - - patch_reloc(lb->label_ptr[0], R_390_PC16DBL, (intptr_t)s->code_ptr, -2); - - tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_AREG0); - if (TARGET_LONG_BITS == 64) { - tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R3, addr_reg); - } - switch (opc & MO_SIZE) { - case MO_UB: - tgen_ext8u(s, TCG_TYPE_I64, TCG_REG_R4, data_reg); - break; - case MO_UW: - tgen_ext16u(s, TCG_TYPE_I64, TCG_REG_R4, data_reg); - break; - case MO_UL: - tgen_ext32u(s, TCG_REG_R4, data_reg); - break; - case MO_Q: - tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R4, data_reg); - break; - default: - tcg_abort(); - } - tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R5, oi); - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R6, (uintptr_t)lb->raddr); - tcg_out_call(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]); - - tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr); -} -#else -static void tcg_prepare_user_ldst(TCGContext *s, TCGReg *addr_reg, - TCGReg *index_reg, tcg_target_long *disp) -{ - if (TARGET_LONG_BITS == 32) { - tgen_ext32u(s, TCG_TMP0, *addr_reg); - *addr_reg = TCG_TMP0; - } - if (guest_base < 0x80000) { - *index_reg = TCG_REG_NONE; - *disp = guest_base; - } else { - *index_reg = TCG_GUEST_BASE_REG; - *disp = 0; - } -} -#endif /* CONFIG_SOFTMMU */ - -static void tcg_out_qemu_ld(TCGContext* s, TCGReg data_reg, TCGReg addr_reg, - TCGMemOpIdx oi) -{ - TCGMemOp opc = get_memop(oi); -#ifdef CONFIG_SOFTMMU - unsigned mem_index = get_mmuidx(oi); - tcg_insn_unit *label_ptr; - TCGReg base_reg; - - base_reg = tcg_out_tlb_read(s, addr_reg, opc, mem_index, 1); - - /* We need to keep the offset unchanged for retranslation. */ - tcg_out16(s, RI_BRC | (S390_CC_NE << 4)); - label_ptr = s->code_ptr; - s->code_ptr += 1; - - tcg_out_qemu_ld_direct(s, opc, data_reg, base_reg, TCG_REG_R2, 0); - - add_qemu_ldst_label(s, 1, oi, data_reg, addr_reg, s->code_ptr, label_ptr); -#else - TCGReg index_reg; - tcg_target_long disp; - - tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp); - tcg_out_qemu_ld_direct(s, opc, data_reg, addr_reg, index_reg, disp); -#endif -} - -static void tcg_out_qemu_st(TCGContext* s, TCGReg data_reg, TCGReg addr_reg, - TCGMemOpIdx oi) -{ - TCGMemOp opc = get_memop(oi); -#ifdef CONFIG_SOFTMMU - unsigned mem_index = get_mmuidx(oi); - tcg_insn_unit *label_ptr; - TCGReg base_reg; - - base_reg = tcg_out_tlb_read(s, addr_reg, opc, mem_index, 0); - - /* We need to keep the offset unchanged for retranslation. */ - tcg_out16(s, RI_BRC | (S390_CC_NE << 4)); - label_ptr = s->code_ptr; - s->code_ptr += 1; - - tcg_out_qemu_st_direct(s, opc, data_reg, base_reg, TCG_REG_R2, 0); - - add_qemu_ldst_label(s, 0, oi, data_reg, addr_reg, s->code_ptr, label_ptr); -#else - TCGReg index_reg; - tcg_target_long disp; - - tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp); - tcg_out_qemu_st_direct(s, opc, data_reg, addr_reg, index_reg, disp); -#endif -} - -# define OP_32_64(x) \ - case glue(glue(INDEX_op_,x),_i32): \ - case glue(glue(INDEX_op_,x),_i64) - -static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, - const TCGArg *args, const int *const_args) -{ - S390Opcode op; - TCGArg a0, a1, a2; - - switch (opc) { - case INDEX_op_exit_tb: - /* return value */ - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, args[0]); - tgen_gotoi(s, S390_CC_ALWAYS, tb_ret_addr); - break; - - case INDEX_op_goto_tb: - if (s->tb_jmp_offset) { - tcg_out16(s, RIL_BRCL | (S390_CC_ALWAYS << 4)); - s->tb_jmp_offset[args[0]] = tcg_current_code_size(s); - s->code_ptr += 2; - } else { - /* load address stored at s->tb_next + args[0] */ - tcg_out_ld_abs(s, TCG_TYPE_PTR, TCG_TMP0, s->tb_next + args[0]); - /* and go there */ - tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_TMP0); - } - s->tb_next_offset[args[0]] = tcg_current_code_size(s); - break; - - OP_32_64(ld8u): - /* ??? LLC (RXY format) is only present with the extended-immediate - facility, whereas LLGC is always present. */ - tcg_out_mem(s, 0, RXY_LLGC, args[0], args[1], TCG_REG_NONE, args[2]); - break; - - OP_32_64(ld8s): - /* ??? LB is no smaller than LGB, so no point to using it. */ - tcg_out_mem(s, 0, RXY_LGB, args[0], args[1], TCG_REG_NONE, args[2]); - break; - - OP_32_64(ld16u): - /* ??? LLH (RXY format) is only present with the extended-immediate - facility, whereas LLGH is always present. */ - tcg_out_mem(s, 0, RXY_LLGH, args[0], args[1], TCG_REG_NONE, args[2]); - break; - - case INDEX_op_ld16s_i32: - tcg_out_mem(s, RX_LH, RXY_LHY, args[0], args[1], TCG_REG_NONE, args[2]); - break; - - case INDEX_op_ld_i32: - tcg_out_ld(s, TCG_TYPE_I32, args[0], args[1], args[2]); - break; - - OP_32_64(st8): - tcg_out_mem(s, RX_STC, RXY_STCY, args[0], args[1], - TCG_REG_NONE, args[2]); - break; - - OP_32_64(st16): - tcg_out_mem(s, RX_STH, RXY_STHY, args[0], args[1], - TCG_REG_NONE, args[2]); - break; - - case INDEX_op_st_i32: - tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]); - break; - - case INDEX_op_add_i32: - a0 = args[0], a1 = args[1], a2 = (int32_t)args[2]; - if (const_args[2]) { - do_addi_32: - if (a0 == a1) { - if (a2 == (int16_t)a2) { - tcg_out_insn(s, RI, AHI, a0, a2); - break; - } - if (facilities & FACILITY_EXT_IMM) { - tcg_out_insn(s, RIL, AFI, a0, a2); - break; - } - } - tcg_out_mem(s, RX_LA, RXY_LAY, a0, a1, TCG_REG_NONE, a2); - } else if (a0 == a1) { - tcg_out_insn(s, RR, AR, a0, a2); - } else { - tcg_out_insn(s, RX, LA, a0, a1, a2, 0); - } - break; - case INDEX_op_sub_i32: - a0 = args[0], a1 = args[1], a2 = (int32_t)args[2]; - if (const_args[2]) { - a2 = -a2; - goto do_addi_32; - } - tcg_out_insn(s, RR, SR, args[0], args[2]); - break; - - case INDEX_op_and_i32: - if (const_args[2]) { - tgen_andi(s, TCG_TYPE_I32, args[0], args[2]); - } else { - tcg_out_insn(s, RR, NR, args[0], args[2]); - } - break; - case INDEX_op_or_i32: - if (const_args[2]) { - tgen64_ori(s, args[0], args[2] & 0xffffffff); - } else { - tcg_out_insn(s, RR, OR, args[0], args[2]); - } - break; - case INDEX_op_xor_i32: - if (const_args[2]) { - tgen64_xori(s, args[0], args[2] & 0xffffffff); - } else { - tcg_out_insn(s, RR, XR, args[0], args[2]); - } - break; - - case INDEX_op_neg_i32: - tcg_out_insn(s, RR, LCR, args[0], args[1]); - break; - - case INDEX_op_mul_i32: - if (const_args[2]) { - if ((int32_t)args[2] == (int16_t)args[2]) { - tcg_out_insn(s, RI, MHI, args[0], args[2]); - } else { - tcg_out_insn(s, RIL, MSFI, args[0], args[2]); - } - } else { - tcg_out_insn(s, RRE, MSR, args[0], args[2]); - } - break; - - case INDEX_op_div2_i32: - tcg_out_insn(s, RR, DR, TCG_REG_R2, args[4]); - break; - case INDEX_op_divu2_i32: - tcg_out_insn(s, RRE, DLR, TCG_REG_R2, args[4]); - break; - - case INDEX_op_shl_i32: - op = RS_SLL; - do_shift32: - if (const_args[2]) { - tcg_out_sh32(s, op, args[0], TCG_REG_NONE, args[2]); - } else { - tcg_out_sh32(s, op, args[0], args[2], 0); - } - break; - case INDEX_op_shr_i32: - op = RS_SRL; - goto do_shift32; - case INDEX_op_sar_i32: - op = RS_SRA; - goto do_shift32; - - case INDEX_op_rotl_i32: - /* ??? Using tcg_out_sh64 here for the format; it is a 32-bit rol. */ - if (const_args[2]) { - tcg_out_sh64(s, RSY_RLL, args[0], args[1], TCG_REG_NONE, args[2]); - } else { - tcg_out_sh64(s, RSY_RLL, args[0], args[1], args[2], 0); - } - break; - case INDEX_op_rotr_i32: - if (const_args[2]) { - tcg_out_sh64(s, RSY_RLL, args[0], args[1], - TCG_REG_NONE, (32 - args[2]) & 31); - } else { - tcg_out_insn(s, RR, LCR, TCG_TMP0, args[2]); - tcg_out_sh64(s, RSY_RLL, args[0], args[1], TCG_TMP0, 0); - } - break; - - case INDEX_op_ext8s_i32: - tgen_ext8s(s, TCG_TYPE_I32, args[0], args[1]); - break; - case INDEX_op_ext16s_i32: - tgen_ext16s(s, TCG_TYPE_I32, args[0], args[1]); - break; - case INDEX_op_ext8u_i32: - tgen_ext8u(s, TCG_TYPE_I32, args[0], args[1]); - break; - case INDEX_op_ext16u_i32: - tgen_ext16u(s, TCG_TYPE_I32, args[0], args[1]); - break; - - OP_32_64(bswap16): - /* The TCG bswap definition requires bits 0-47 already be zero. - Thus we don't need the G-type insns to implement bswap16_i64. */ - tcg_out_insn(s, RRE, LRVR, args[0], args[1]); - tcg_out_sh32(s, RS_SRL, args[0], TCG_REG_NONE, 16); - break; - OP_32_64(bswap32): - tcg_out_insn(s, RRE, LRVR, args[0], args[1]); - break; - - case INDEX_op_add2_i32: - if (const_args[4]) { - tcg_out_insn(s, RIL, ALFI, args[0], args[4]); - } else { - tcg_out_insn(s, RR, ALR, args[0], args[4]); - } - tcg_out_insn(s, RRE, ALCR, args[1], args[5]); - break; - case INDEX_op_sub2_i32: - if (const_args[4]) { - tcg_out_insn(s, RIL, SLFI, args[0], args[4]); - } else { - tcg_out_insn(s, RR, SLR, args[0], args[4]); - } - tcg_out_insn(s, RRE, SLBR, args[1], args[5]); - break; - - case INDEX_op_br: - tgen_branch(s, S390_CC_ALWAYS, arg_label(args[0])); - break; - - case INDEX_op_brcond_i32: - tgen_brcond(s, TCG_TYPE_I32, args[2], args[0], - args[1], const_args[1], arg_label(args[3])); - break; - case INDEX_op_setcond_i32: - tgen_setcond(s, TCG_TYPE_I32, args[3], args[0], args[1], - args[2], const_args[2]); - break; - case INDEX_op_movcond_i32: - tgen_movcond(s, TCG_TYPE_I32, args[5], args[0], args[1], - args[2], const_args[2], args[3]); - break; - - case INDEX_op_qemu_ld_i32: - /* ??? Technically we can use a non-extending instruction. */ - case INDEX_op_qemu_ld_i64: - tcg_out_qemu_ld(s, args[0], args[1], args[2]); - break; - case INDEX_op_qemu_st_i32: - case INDEX_op_qemu_st_i64: - tcg_out_qemu_st(s, args[0], args[1], args[2]); - break; - - case INDEX_op_ld16s_i64: - tcg_out_mem(s, 0, RXY_LGH, args[0], args[1], TCG_REG_NONE, args[2]); - break; - case INDEX_op_ld32u_i64: - tcg_out_mem(s, 0, RXY_LLGF, args[0], args[1], TCG_REG_NONE, args[2]); - break; - case INDEX_op_ld32s_i64: - tcg_out_mem(s, 0, RXY_LGF, args[0], args[1], TCG_REG_NONE, 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_st32_i64: - tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]); - break; - case INDEX_op_st_i64: - tcg_out_st(s, TCG_TYPE_I64, args[0], args[1], args[2]); - break; - - case INDEX_op_add_i64: - a0 = args[0], a1 = args[1], a2 = args[2]; - if (const_args[2]) { - do_addi_64: - if (a0 == a1) { - if (a2 == (int16_t)a2) { - tcg_out_insn(s, RI, AGHI, a0, a2); - break; - } - if (facilities & FACILITY_EXT_IMM) { - if (a2 == (int32_t)a2) { - tcg_out_insn(s, RIL, AGFI, a0, a2); - break; - } else if (a2 == (uint32_t)a2) { - tcg_out_insn(s, RIL, ALGFI, a0, a2); - break; - } else if (-a2 == (uint32_t)-a2) { - tcg_out_insn(s, RIL, SLGFI, a0, -a2); - break; - } - } - } - tcg_out_mem(s, RX_LA, RXY_LAY, a0, a1, TCG_REG_NONE, a2); - } else if (a0 == a1) { - tcg_out_insn(s, RRE, AGR, a0, a2); - } else { - tcg_out_insn(s, RX, LA, a0, a1, a2, 0); - } - break; - case INDEX_op_sub_i64: - a0 = args[0], a1 = args[1], a2 = args[2]; - if (const_args[2]) { - a2 = -a2; - goto do_addi_64; - } else { - tcg_out_insn(s, RRE, SGR, args[0], args[2]); - } - break; - - case INDEX_op_and_i64: - if (const_args[2]) { - tgen_andi(s, TCG_TYPE_I64, args[0], args[2]); - } else { - tcg_out_insn(s, RRE, NGR, args[0], args[2]); - } - break; - case INDEX_op_or_i64: - if (const_args[2]) { - tgen64_ori(s, args[0], args[2]); - } else { - tcg_out_insn(s, RRE, OGR, args[0], args[2]); - } - break; - case INDEX_op_xor_i64: - if (const_args[2]) { - tgen64_xori(s, args[0], args[2]); - } else { - tcg_out_insn(s, RRE, XGR, args[0], args[2]); - } - break; - - case INDEX_op_neg_i64: - tcg_out_insn(s, RRE, LCGR, args[0], args[1]); - break; - case INDEX_op_bswap64_i64: - tcg_out_insn(s, RRE, LRVGR, args[0], args[1]); - break; - - case INDEX_op_mul_i64: - if (const_args[2]) { - if (args[2] == (int16_t)args[2]) { - tcg_out_insn(s, RI, MGHI, args[0], args[2]); - } else { - tcg_out_insn(s, RIL, MSGFI, args[0], args[2]); - } - } else { - tcg_out_insn(s, RRE, MSGR, args[0], args[2]); - } - break; - - case INDEX_op_div2_i64: - /* ??? We get an unnecessary sign-extension of the dividend - into R3 with this definition, but as we do in fact always - produce both quotient and remainder using INDEX_op_div_i64 - instead requires jumping through even more hoops. */ - tcg_out_insn(s, RRE, DSGR, TCG_REG_R2, args[4]); - break; - case INDEX_op_divu2_i64: - tcg_out_insn(s, RRE, DLGR, TCG_REG_R2, args[4]); - break; - case INDEX_op_mulu2_i64: - tcg_out_insn(s, RRE, MLGR, TCG_REG_R2, args[3]); - break; - - case INDEX_op_shl_i64: - op = RSY_SLLG; - do_shift64: - if (const_args[2]) { - tcg_out_sh64(s, op, args[0], args[1], TCG_REG_NONE, args[2]); - } else { - tcg_out_sh64(s, op, args[0], args[1], args[2], 0); - } - break; - case INDEX_op_shr_i64: - op = RSY_SRLG; - goto do_shift64; - case INDEX_op_sar_i64: - op = RSY_SRAG; - goto do_shift64; - - case INDEX_op_rotl_i64: - if (const_args[2]) { - tcg_out_sh64(s, RSY_RLLG, args[0], args[1], - TCG_REG_NONE, args[2]); - } else { - tcg_out_sh64(s, RSY_RLLG, args[0], args[1], args[2], 0); - } - break; - case INDEX_op_rotr_i64: - if (const_args[2]) { - tcg_out_sh64(s, RSY_RLLG, args[0], args[1], - TCG_REG_NONE, (64 - args[2]) & 63); - } else { - /* We can use the smaller 32-bit negate because only the - low 6 bits are examined for the rotate. */ - tcg_out_insn(s, RR, LCR, TCG_TMP0, args[2]); - tcg_out_sh64(s, RSY_RLLG, args[0], args[1], TCG_TMP0, 0); - } - break; - - case INDEX_op_ext8s_i64: - tgen_ext8s(s, TCG_TYPE_I64, args[0], args[1]); - break; - case INDEX_op_ext16s_i64: - tgen_ext16s(s, TCG_TYPE_I64, args[0], args[1]); - break; - case INDEX_op_ext_i32_i64: - case INDEX_op_ext32s_i64: - tgen_ext32s(s, args[0], args[1]); - break; - case INDEX_op_ext8u_i64: - tgen_ext8u(s, TCG_TYPE_I64, args[0], args[1]); - break; - case INDEX_op_ext16u_i64: - tgen_ext16u(s, TCG_TYPE_I64, args[0], args[1]); - break; - case INDEX_op_extu_i32_i64: - case INDEX_op_ext32u_i64: - tgen_ext32u(s, args[0], args[1]); - break; - - case INDEX_op_add2_i64: - if (const_args[4]) { - if ((int64_t)args[4] >= 0) { - tcg_out_insn(s, RIL, ALGFI, args[0], args[4]); - } else { - tcg_out_insn(s, RIL, SLGFI, args[0], -args[4]); - } - } else { - tcg_out_insn(s, RRE, ALGR, args[0], args[4]); - } - tcg_out_insn(s, RRE, ALCGR, args[1], args[5]); - break; - case INDEX_op_sub2_i64: - if (const_args[4]) { - if ((int64_t)args[4] >= 0) { - tcg_out_insn(s, RIL, SLGFI, args[0], args[4]); - } else { - tcg_out_insn(s, RIL, ALGFI, args[0], -args[4]); - } - } else { - tcg_out_insn(s, RRE, SLGR, args[0], args[4]); - } - tcg_out_insn(s, RRE, SLBGR, args[1], args[5]); - break; - - case INDEX_op_brcond_i64: - tgen_brcond(s, TCG_TYPE_I64, args[2], args[0], - args[1], const_args[1], arg_label(args[3])); - break; - case INDEX_op_setcond_i64: - tgen_setcond(s, TCG_TYPE_I64, args[3], args[0], args[1], - args[2], const_args[2]); - break; - case INDEX_op_movcond_i64: - tgen_movcond(s, TCG_TYPE_I64, args[5], args[0], args[1], - args[2], const_args[2], args[3]); - break; - - OP_32_64(deposit): - tgen_deposit(s, args[0], args[2], args[3], args[4]); - 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(); - } -} - -static const TCGTargetOpDef s390_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, { "r", "r" } }, - { INDEX_op_st16_i32, { "r", "r" } }, - { INDEX_op_st_i32, { "r", "r" } }, - - { INDEX_op_add_i32, { "r", "r", "ri" } }, - { INDEX_op_sub_i32, { "r", "0", "ri" } }, - { INDEX_op_mul_i32, { "r", "0", "rK" } }, - - { INDEX_op_div2_i32, { "b", "a", "0", "1", "r" } }, - { INDEX_op_divu2_i32, { "b", "a", "0", "1", "r" } }, - - { INDEX_op_and_i32, { "r", "0", "ri" } }, - { INDEX_op_or_i32, { "r", "0", "rO" } }, - { INDEX_op_xor_i32, { "r", "0", "rX" } }, - - { INDEX_op_neg_i32, { "r", "r" } }, - - { INDEX_op_shl_i32, { "r", "0", "Ri" } }, - { INDEX_op_shr_i32, { "r", "0", "Ri" } }, - { INDEX_op_sar_i32, { "r", "0", "Ri" } }, - - { INDEX_op_rotl_i32, { "r", "r", "Ri" } }, - { INDEX_op_rotr_i32, { "r", "r", "Ri" } }, - - { INDEX_op_ext8s_i32, { "r", "r" } }, - { INDEX_op_ext8u_i32, { "r", "r" } }, - { INDEX_op_ext16s_i32, { "r", "r" } }, - { INDEX_op_ext16u_i32, { "r", "r" } }, - - { INDEX_op_bswap16_i32, { "r", "r" } }, - { INDEX_op_bswap32_i32, { "r", "r" } }, - - { INDEX_op_add2_i32, { "r", "r", "0", "1", "rA", "r" } }, - { INDEX_op_sub2_i32, { "r", "r", "0", "1", "rA", "r" } }, - - { INDEX_op_brcond_i32, { "r", "rC" } }, - { INDEX_op_setcond_i32, { "r", "r", "rC" } }, - { INDEX_op_movcond_i32, { "r", "r", "rC", "r", "0" } }, - { INDEX_op_deposit_i32, { "r", "0", "r" } }, - - { INDEX_op_qemu_ld_i32, { "r", "L" } }, - { INDEX_op_qemu_ld_i64, { "r", "L" } }, - { INDEX_op_qemu_st_i32, { "L", "L" } }, - { INDEX_op_qemu_st_i64, { "L", "L" } }, - - { 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, { "r", "r" } }, - { INDEX_op_st16_i64, { "r", "r" } }, - { INDEX_op_st32_i64, { "r", "r" } }, - { INDEX_op_st_i64, { "r", "r" } }, - - { INDEX_op_add_i64, { "r", "r", "ri" } }, - { INDEX_op_sub_i64, { "r", "0", "ri" } }, - { INDEX_op_mul_i64, { "r", "0", "rK" } }, - - { INDEX_op_div2_i64, { "b", "a", "0", "1", "r" } }, - { INDEX_op_divu2_i64, { "b", "a", "0", "1", "r" } }, - { INDEX_op_mulu2_i64, { "b", "a", "0", "r" } }, - - { INDEX_op_and_i64, { "r", "0", "ri" } }, - { INDEX_op_or_i64, { "r", "0", "rO" } }, - { INDEX_op_xor_i64, { "r", "0", "rX" } }, - - { INDEX_op_neg_i64, { "r", "r" } }, - - { INDEX_op_shl_i64, { "r", "r", "Ri" } }, - { INDEX_op_shr_i64, { "r", "r", "Ri" } }, - { INDEX_op_sar_i64, { "r", "r", "Ri" } }, - - { INDEX_op_rotl_i64, { "r", "r", "Ri" } }, - { INDEX_op_rotr_i64, { "r", "r", "Ri" } }, - - { INDEX_op_ext8s_i64, { "r", "r" } }, - { INDEX_op_ext8u_i64, { "r", "r" } }, - { INDEX_op_ext16s_i64, { "r", "r" } }, - { INDEX_op_ext16u_i64, { "r", "r" } }, - { INDEX_op_ext32s_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_bswap16_i64, { "r", "r" } }, - { INDEX_op_bswap32_i64, { "r", "r" } }, - { INDEX_op_bswap64_i64, { "r", "r" } }, - - { INDEX_op_add2_i64, { "r", "r", "0", "1", "rA", "r" } }, - { INDEX_op_sub2_i64, { "r", "r", "0", "1", "rA", "r" } }, - - { INDEX_op_brcond_i64, { "r", "rC" } }, - { INDEX_op_setcond_i64, { "r", "r", "rC" } }, - { INDEX_op_movcond_i64, { "r", "r", "rC", "r", "0" } }, - { INDEX_op_deposit_i64, { "r", "0", "r" } }, - - { -1 }, -}; - -static void query_facilities(void) -{ - unsigned long hwcap = qemu_getauxval(AT_HWCAP); - - /* Is STORE FACILITY LIST EXTENDED available? Honestly, I believe this - is present on all 64-bit systems, but let's check for it anyway. */ - if (hwcap & HWCAP_S390_STFLE) { - register int r0 __asm__("0"); - register void *r1 __asm__("1"); - - /* stfle 0(%r1) */ - r1 = &facilities; - asm volatile(".word 0xb2b0,0x1000" - : "=r"(r0) : "0"(0), "r"(r1) : "memory", "cc"); - } -} - -static void tcg_target_init(TCGContext *s) -{ - query_facilities(); - - tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff); - tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffff); - - tcg_regset_clear(tcg_target_call_clobber_regs); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R0); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R1); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R2); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R3); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R4); - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R5); - /* The r6 register is technically call-saved, but it's also a parameter - register, so it can get killed by setup for the qemu_st helper. */ - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R6); - /* The return register can be considered call-clobbered. */ - tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14); - - tcg_regset_clear(s->reserved_regs); - tcg_regset_set_reg(s->reserved_regs, TCG_TMP0); - /* XXX many insns can't be used with R0, so we better avoid it for now */ - tcg_regset_set_reg(s->reserved_regs, TCG_REG_R0); - tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK); - - tcg_add_target_add_op_defs(s390_op_defs); -} - -#define FRAME_SIZE ((int)(TCG_TARGET_CALL_STACK_OFFSET \ - + TCG_STATIC_CALL_ARGS_SIZE \ - + CPU_TEMP_BUF_NLONGS * sizeof(long))) - -static void tcg_target_qemu_prologue(TCGContext *s) -{ - /* stmg %r6,%r15,48(%r15) (save registers) */ - tcg_out_insn(s, RXY, STMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, 48); - - /* aghi %r15,-frame_size */ - tcg_out_insn(s, RI, AGHI, TCG_REG_R15, -FRAME_SIZE); - - tcg_set_frame(s, TCG_REG_CALL_STACK, - TCG_STATIC_CALL_ARGS_SIZE + TCG_TARGET_CALL_STACK_OFFSET, - CPU_TEMP_BUF_NLONGS * sizeof(long)); - -#ifndef CONFIG_SOFTMMU - if (guest_base >= 0x80000) { - tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base); - tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG); - } -#endif - - tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); - /* br %r3 (go to TB) */ - tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, tcg_target_call_iarg_regs[1]); - - tb_ret_addr = s->code_ptr; - - /* lmg %r6,%r15,fs+48(%r15) (restore registers) */ - tcg_out_insn(s, RXY, LMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, - FRAME_SIZE + 48); - - /* br %r14 (return) */ - tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_REG_R14); -} - -typedef struct { - DebugFrameHeader h; - uint8_t fde_def_cfa[4]; - uint8_t fde_reg_ofs[18]; -} DebugFrame; - -/* We're expecting a 2 byte uleb128 encoded value. */ -QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14)); - -#define ELF_HOST_MACHINE EM_S390 - -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 = 8, /* sleb128 8 */ - .h.cie.return_column = TCG_REG_R14, - - /* Total FDE size does not include the "len" member. */ - .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), - - .fde_def_cfa = { - 12, TCG_REG_CALL_STACK, /* DW_CFA_def_cfa %r15, ... */ - (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ - (FRAME_SIZE >> 7) - }, - .fde_reg_ofs = { - 0x86, 6, /* DW_CFA_offset, %r6, 48 */ - 0x87, 7, /* DW_CFA_offset, %r7, 56 */ - 0x88, 8, /* DW_CFA_offset, %r8, 64 */ - 0x89, 9, /* DW_CFA_offset, %r92, 72 */ - 0x8a, 10, /* DW_CFA_offset, %r10, 80 */ - 0x8b, 11, /* DW_CFA_offset, %r11, 88 */ - 0x8c, 12, /* DW_CFA_offset, %r12, 96 */ - 0x8d, 13, /* DW_CFA_offset, %r13, 104 */ - 0x8e, 14, /* DW_CFA_offset, %r14, 112 */ - } -}; - -void tcg_register_jit(void *buf, size_t buf_size) -{ - tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); -} |