1/* 2 * Tiny Code Generator for QEMU 3 * 4 * Copyright (c) 2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25#include "../tcg-pool.c.inc" 26 27#ifdef CONFIG_DEBUG_TCG 28static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { 29#if TCG_TARGET_REG_BITS == 64 30 "%rax", "%rcx", "%rdx", "%rbx", "%rsp", "%rbp", "%rsi", "%rdi", 31#else 32 "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi", 33#endif 34 "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", 35 "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", 36#if TCG_TARGET_REG_BITS == 64 37 "%xmm8", "%xmm9", "%xmm10", "%xmm11", 38 "%xmm12", "%xmm13", "%xmm14", "%xmm15", 39#endif 40}; 41#endif 42 43static const int tcg_target_reg_alloc_order[] = { 44#if TCG_TARGET_REG_BITS == 64 45 TCG_REG_RBP, 46 TCG_REG_RBX, 47 TCG_REG_R12, 48 TCG_REG_R13, 49 TCG_REG_R14, 50 TCG_REG_R15, 51 TCG_REG_R10, 52 TCG_REG_R11, 53 TCG_REG_R9, 54 TCG_REG_R8, 55 TCG_REG_RCX, 56 TCG_REG_RDX, 57 TCG_REG_RSI, 58 TCG_REG_RDI, 59 TCG_REG_RAX, 60#else 61 TCG_REG_EBX, 62 TCG_REG_ESI, 63 TCG_REG_EDI, 64 TCG_REG_EBP, 65 TCG_REG_ECX, 66 TCG_REG_EDX, 67 TCG_REG_EAX, 68#endif 69 TCG_REG_XMM0, 70 TCG_REG_XMM1, 71 TCG_REG_XMM2, 72 TCG_REG_XMM3, 73 TCG_REG_XMM4, 74 TCG_REG_XMM5, 75#ifndef _WIN64 76 /* The Win64 ABI has xmm6-xmm15 as caller-saves, and we do not save 77 any of them. Therefore only allow xmm0-xmm5 to be allocated. */ 78 TCG_REG_XMM6, 79 TCG_REG_XMM7, 80#if TCG_TARGET_REG_BITS == 64 81 TCG_REG_XMM8, 82 TCG_REG_XMM9, 83 TCG_REG_XMM10, 84 TCG_REG_XMM11, 85 TCG_REG_XMM12, 86 TCG_REG_XMM13, 87 TCG_REG_XMM14, 88 TCG_REG_XMM15, 89#endif 90#endif 91}; 92 93static const int tcg_target_call_iarg_regs[] = { 94#if TCG_TARGET_REG_BITS == 64 95#if defined(_WIN64) 96 TCG_REG_RCX, 97 TCG_REG_RDX, 98#else 99 TCG_REG_RDI, 100 TCG_REG_RSI, 101 TCG_REG_RDX, 102 TCG_REG_RCX, 103#endif 104 TCG_REG_R8, 105 TCG_REG_R9, 106#else 107 /* 32 bit mode uses stack based calling convention (GCC default). */ 108#endif 109}; 110 111static const int tcg_target_call_oarg_regs[] = { 112 TCG_REG_EAX, 113#if TCG_TARGET_REG_BITS == 32 114 TCG_REG_EDX 115#endif 116}; 117 118/* Constants we accept. */ 119#define TCG_CT_CONST_S32 0x100 120#define TCG_CT_CONST_U32 0x200 121#define TCG_CT_CONST_I32 0x400 122#define TCG_CT_CONST_WSZ 0x800 123 124/* Registers used with L constraint, which are the first argument 125 registers on x86_64, and two random call clobbered registers on 126 i386. */ 127#if TCG_TARGET_REG_BITS == 64 128# define TCG_REG_L0 tcg_target_call_iarg_regs[0] 129# define TCG_REG_L1 tcg_target_call_iarg_regs[1] 130#else 131# define TCG_REG_L0 TCG_REG_EAX 132# define TCG_REG_L1 TCG_REG_EDX 133#endif 134 135/* The host compiler should supply <cpuid.h> to enable runtime features 136 detection, as we're not going to go so far as our own inline assembly. 137 If not available, default values will be assumed. */ 138#if defined(CONFIG_CPUID_H) 139#include "qemu/cpuid.h" 140#endif 141 142/* For 64-bit, we always know that CMOV is available. */ 143#if TCG_TARGET_REG_BITS == 64 144# define have_cmov 1 145#elif defined(CONFIG_CPUID_H) 146static bool have_cmov; 147#else 148# define have_cmov 0 149#endif 150 151/* We need these symbols in tcg-target.h, and we can't properly conditionalize 152 it there. Therefore we always define the variable. */ 153bool have_bmi1; 154bool have_popcnt; 155bool have_avx1; 156bool have_avx2; 157 158#ifdef CONFIG_CPUID_H 159static bool have_movbe; 160static bool have_bmi2; 161static bool have_lzcnt; 162#else 163# define have_movbe 0 164# define have_bmi2 0 165# define have_lzcnt 0 166#endif 167 168static tcg_insn_unit *tb_ret_addr; 169 170static bool patch_reloc(tcg_insn_unit *code_ptr, int type, 171 intptr_t value, intptr_t addend) 172{ 173 value += addend; 174 switch(type) { 175 case R_386_PC32: 176 value -= (uintptr_t)code_ptr; 177 if (value != (int32_t)value) { 178 return false; 179 } 180 /* FALLTHRU */ 181 case R_386_32: 182 tcg_patch32(code_ptr, value); 183 break; 184 case R_386_PC8: 185 value -= (uintptr_t)code_ptr; 186 if (value != (int8_t)value) { 187 return false; 188 } 189 tcg_patch8(code_ptr, value); 190 break; 191 default: 192 tcg_abort(); 193 } 194 return true; 195} 196 197#if TCG_TARGET_REG_BITS == 64 198#define ALL_GENERAL_REGS 0x0000ffffu 199#define ALL_VECTOR_REGS 0xffff0000u 200#else 201#define ALL_GENERAL_REGS 0x000000ffu 202#define ALL_VECTOR_REGS 0x00ff0000u 203#endif 204 205/* parse target specific constraints */ 206static const char *target_parse_constraint(TCGArgConstraint *ct, 207 const char *ct_str, TCGType type) 208{ 209 switch(*ct_str++) { 210 case 'a': 211 tcg_regset_set_reg(ct->regs, TCG_REG_EAX); 212 break; 213 case 'b': 214 tcg_regset_set_reg(ct->regs, TCG_REG_EBX); 215 break; 216 case 'c': 217 tcg_regset_set_reg(ct->regs, TCG_REG_ECX); 218 break; 219 case 'd': 220 tcg_regset_set_reg(ct->regs, TCG_REG_EDX); 221 break; 222 case 'S': 223 tcg_regset_set_reg(ct->regs, TCG_REG_ESI); 224 break; 225 case 'D': 226 tcg_regset_set_reg(ct->regs, TCG_REG_EDI); 227 break; 228 case 'q': 229 /* A register that can be used as a byte operand. */ 230 ct->regs = TCG_TARGET_REG_BITS == 64 ? 0xffff : 0xf; 231 break; 232 case 'Q': 233 /* A register with an addressable second byte (e.g. %ah). */ 234 ct->regs = 0xf; 235 break; 236 case 'r': 237 /* A general register. */ 238 ct->regs |= ALL_GENERAL_REGS; 239 break; 240 case 'W': 241 /* With TZCNT/LZCNT, we can have operand-size as an input. */ 242 ct->ct |= TCG_CT_CONST_WSZ; 243 break; 244 case 'x': 245 /* A vector register. */ 246 ct->regs |= ALL_VECTOR_REGS; 247 break; 248 249 /* qemu_ld/st address constraint */ 250 case 'L': 251 ct->regs = TCG_TARGET_REG_BITS == 64 ? 0xffff : 0xff; 252 tcg_regset_reset_reg(ct->regs, TCG_REG_L0); 253 tcg_regset_reset_reg(ct->regs, TCG_REG_L1); 254 break; 255 256 case 'e': 257 ct->ct |= (type == TCG_TYPE_I32 ? TCG_CT_CONST : TCG_CT_CONST_S32); 258 break; 259 case 'Z': 260 ct->ct |= (type == TCG_TYPE_I32 ? TCG_CT_CONST : TCG_CT_CONST_U32); 261 break; 262 case 'I': 263 ct->ct |= (type == TCG_TYPE_I32 ? TCG_CT_CONST : TCG_CT_CONST_I32); 264 break; 265 266 default: 267 return NULL; 268 } 269 return ct_str; 270} 271 272/* test if a constant matches the constraint */ 273static inline int tcg_target_const_match(tcg_target_long val, TCGType type, 274 const TCGArgConstraint *arg_ct) 275{ 276 int ct = arg_ct->ct; 277 if (ct & TCG_CT_CONST) { 278 return 1; 279 } 280 if ((ct & TCG_CT_CONST_S32) && val == (int32_t)val) { 281 return 1; 282 } 283 if ((ct & TCG_CT_CONST_U32) && val == (uint32_t)val) { 284 return 1; 285 } 286 if ((ct & TCG_CT_CONST_I32) && ~val == (int32_t)~val) { 287 return 1; 288 } 289 if ((ct & TCG_CT_CONST_WSZ) && val == (type == TCG_TYPE_I32 ? 32 : 64)) { 290 return 1; 291 } 292 return 0; 293} 294 295# define LOWREGMASK(x) ((x) & 7) 296 297#define P_EXT 0x100 /* 0x0f opcode prefix */ 298#define P_EXT38 0x200 /* 0x0f 0x38 opcode prefix */ 299#define P_DATA16 0x400 /* 0x66 opcode prefix */ 300#if TCG_TARGET_REG_BITS == 64 301# define P_REXW 0x1000 /* Set REX.W = 1 */ 302# define P_REXB_R 0x2000 /* REG field as byte register */ 303# define P_REXB_RM 0x4000 /* R/M field as byte register */ 304# define P_GS 0x8000 /* gs segment override */ 305#else 306# define P_REXW 0 307# define P_REXB_R 0 308# define P_REXB_RM 0 309# define P_GS 0 310#endif 311#define P_EXT3A 0x10000 /* 0x0f 0x3a opcode prefix */ 312#define P_SIMDF3 0x20000 /* 0xf3 opcode prefix */ 313#define P_SIMDF2 0x40000 /* 0xf2 opcode prefix */ 314#define P_VEXL 0x80000 /* Set VEX.L = 1 */ 315 316#define OPC_ARITH_EvIz (0x81) 317#define OPC_ARITH_EvIb (0x83) 318#define OPC_ARITH_GvEv (0x03) /* ... plus (ARITH_FOO << 3) */ 319#define OPC_ANDN (0xf2 | P_EXT38) 320#define OPC_ADD_GvEv (OPC_ARITH_GvEv | (ARITH_ADD << 3)) 321#define OPC_AND_GvEv (OPC_ARITH_GvEv | (ARITH_AND << 3)) 322#define OPC_BLENDPS (0x0c | P_EXT3A | P_DATA16) 323#define OPC_BSF (0xbc | P_EXT) 324#define OPC_BSR (0xbd | P_EXT) 325#define OPC_BSWAP (0xc8 | P_EXT) 326#define OPC_CALL_Jz (0xe8) 327#define OPC_CMOVCC (0x40 | P_EXT) /* ... plus condition code */ 328#define OPC_CMP_GvEv (OPC_ARITH_GvEv | (ARITH_CMP << 3)) 329#define OPC_DEC_r32 (0x48) 330#define OPC_IMUL_GvEv (0xaf | P_EXT) 331#define OPC_IMUL_GvEvIb (0x6b) 332#define OPC_IMUL_GvEvIz (0x69) 333#define OPC_INC_r32 (0x40) 334#define OPC_JCC_long (0x80 | P_EXT) /* ... plus condition code */ 335#define OPC_JCC_short (0x70) /* ... plus condition code */ 336#define OPC_JMP_long (0xe9) 337#define OPC_JMP_short (0xeb) 338#define OPC_LEA (0x8d) 339#define OPC_LZCNT (0xbd | P_EXT | P_SIMDF3) 340#define OPC_MOVB_EvGv (0x88) /* stores, more or less */ 341#define OPC_MOVL_EvGv (0x89) /* stores, more or less */ 342#define OPC_MOVL_GvEv (0x8b) /* loads, more or less */ 343#define OPC_MOVB_EvIz (0xc6) 344#define OPC_MOVL_EvIz (0xc7) 345#define OPC_MOVL_Iv (0xb8) 346#define OPC_MOVBE_GyMy (0xf0 | P_EXT38) 347#define OPC_MOVBE_MyGy (0xf1 | P_EXT38) 348#define OPC_MOVD_VyEy (0x6e | P_EXT | P_DATA16) 349#define OPC_MOVD_EyVy (0x7e | P_EXT | P_DATA16) 350#define OPC_MOVDDUP (0x12 | P_EXT | P_SIMDF2) 351#define OPC_MOVDQA_VxWx (0x6f | P_EXT | P_DATA16) 352#define OPC_MOVDQA_WxVx (0x7f | P_EXT | P_DATA16) 353#define OPC_MOVDQU_VxWx (0x6f | P_EXT | P_SIMDF3) 354#define OPC_MOVDQU_WxVx (0x7f | P_EXT | P_SIMDF3) 355#define OPC_MOVQ_VqWq (0x7e | P_EXT | P_SIMDF3) 356#define OPC_MOVQ_WqVq (0xd6 | P_EXT | P_DATA16) 357#define OPC_MOVSBL (0xbe | P_EXT) 358#define OPC_MOVSWL (0xbf | P_EXT) 359#define OPC_MOVSLQ (0x63 | P_REXW) 360#define OPC_MOVZBL (0xb6 | P_EXT) 361#define OPC_MOVZWL (0xb7 | P_EXT) 362#define OPC_PABSB (0x1c | P_EXT38 | P_DATA16) 363#define OPC_PABSW (0x1d | P_EXT38 | P_DATA16) 364#define OPC_PABSD (0x1e | P_EXT38 | P_DATA16) 365#define OPC_PACKSSDW (0x6b | P_EXT | P_DATA16) 366#define OPC_PACKSSWB (0x63 | P_EXT | P_DATA16) 367#define OPC_PACKUSDW (0x2b | P_EXT38 | P_DATA16) 368#define OPC_PACKUSWB (0x67 | P_EXT | P_DATA16) 369#define OPC_PADDB (0xfc | P_EXT | P_DATA16) 370#define OPC_PADDW (0xfd | P_EXT | P_DATA16) 371#define OPC_PADDD (0xfe | P_EXT | P_DATA16) 372#define OPC_PADDQ (0xd4 | P_EXT | P_DATA16) 373#define OPC_PADDSB (0xec | P_EXT | P_DATA16) 374#define OPC_PADDSW (0xed | P_EXT | P_DATA16) 375#define OPC_PADDUB (0xdc | P_EXT | P_DATA16) 376#define OPC_PADDUW (0xdd | P_EXT | P_DATA16) 377#define OPC_PAND (0xdb | P_EXT | P_DATA16) 378#define OPC_PANDN (0xdf | P_EXT | P_DATA16) 379#define OPC_PBLENDW (0x0e | P_EXT3A | P_DATA16) 380#define OPC_PCMPEQB (0x74 | P_EXT | P_DATA16) 381#define OPC_PCMPEQW (0x75 | P_EXT | P_DATA16) 382#define OPC_PCMPEQD (0x76 | P_EXT | P_DATA16) 383#define OPC_PCMPEQQ (0x29 | P_EXT38 | P_DATA16) 384#define OPC_PCMPGTB (0x64 | P_EXT | P_DATA16) 385#define OPC_PCMPGTW (0x65 | P_EXT | P_DATA16) 386#define OPC_PCMPGTD (0x66 | P_EXT | P_DATA16) 387#define OPC_PCMPGTQ (0x37 | P_EXT38 | P_DATA16) 388#define OPC_PMAXSB (0x3c | P_EXT38 | P_DATA16) 389#define OPC_PMAXSW (0xee | P_EXT | P_DATA16) 390#define OPC_PMAXSD (0x3d | P_EXT38 | P_DATA16) 391#define OPC_PMAXUB (0xde | P_EXT | P_DATA16) 392#define OPC_PMAXUW (0x3e | P_EXT38 | P_DATA16) 393#define OPC_PMAXUD (0x3f | P_EXT38 | P_DATA16) 394#define OPC_PMINSB (0x38 | P_EXT38 | P_DATA16) 395#define OPC_PMINSW (0xea | P_EXT | P_DATA16) 396#define OPC_PMINSD (0x39 | P_EXT38 | P_DATA16) 397#define OPC_PMINUB (0xda | P_EXT | P_DATA16) 398#define OPC_PMINUW (0x3a | P_EXT38 | P_DATA16) 399#define OPC_PMINUD (0x3b | P_EXT38 | P_DATA16) 400#define OPC_PMOVSXBW (0x20 | P_EXT38 | P_DATA16) 401#define OPC_PMOVSXWD (0x23 | P_EXT38 | P_DATA16) 402#define OPC_PMOVSXDQ (0x25 | P_EXT38 | P_DATA16) 403#define OPC_PMOVZXBW (0x30 | P_EXT38 | P_DATA16) 404#define OPC_PMOVZXWD (0x33 | P_EXT38 | P_DATA16) 405#define OPC_PMOVZXDQ (0x35 | P_EXT38 | P_DATA16) 406#define OPC_PMULLW (0xd5 | P_EXT | P_DATA16) 407#define OPC_PMULLD (0x40 | P_EXT38 | P_DATA16) 408#define OPC_POR (0xeb | P_EXT | P_DATA16) 409#define OPC_PSHUFB (0x00 | P_EXT38 | P_DATA16) 410#define OPC_PSHUFD (0x70 | P_EXT | P_DATA16) 411#define OPC_PSHUFLW (0x70 | P_EXT | P_SIMDF2) 412#define OPC_PSHUFHW (0x70 | P_EXT | P_SIMDF3) 413#define OPC_PSHIFTW_Ib (0x71 | P_EXT | P_DATA16) /* /2 /6 /4 */ 414#define OPC_PSHIFTD_Ib (0x72 | P_EXT | P_DATA16) /* /2 /6 /4 */ 415#define OPC_PSHIFTQ_Ib (0x73 | P_EXT | P_DATA16) /* /2 /6 /4 */ 416#define OPC_PSLLW (0xf1 | P_EXT | P_DATA16) 417#define OPC_PSLLD (0xf2 | P_EXT | P_DATA16) 418#define OPC_PSLLQ (0xf3 | P_EXT | P_DATA16) 419#define OPC_PSRAW (0xe1 | P_EXT | P_DATA16) 420#define OPC_PSRAD (0xe2 | P_EXT | P_DATA16) 421#define OPC_PSRLW (0xd1 | P_EXT | P_DATA16) 422#define OPC_PSRLD (0xd2 | P_EXT | P_DATA16) 423#define OPC_PSRLQ (0xd3 | P_EXT | P_DATA16) 424#define OPC_PSUBB (0xf8 | P_EXT | P_DATA16) 425#define OPC_PSUBW (0xf9 | P_EXT | P_DATA16) 426#define OPC_PSUBD (0xfa | P_EXT | P_DATA16) 427#define OPC_PSUBQ (0xfb | P_EXT | P_DATA16) 428#define OPC_PSUBSB (0xe8 | P_EXT | P_DATA16) 429#define OPC_PSUBSW (0xe9 | P_EXT | P_DATA16) 430#define OPC_PSUBUB (0xd8 | P_EXT | P_DATA16) 431#define OPC_PSUBUW (0xd9 | P_EXT | P_DATA16) 432#define OPC_PUNPCKLBW (0x60 | P_EXT | P_DATA16) 433#define OPC_PUNPCKLWD (0x61 | P_EXT | P_DATA16) 434#define OPC_PUNPCKLDQ (0x62 | P_EXT | P_DATA16) 435#define OPC_PUNPCKLQDQ (0x6c | P_EXT | P_DATA16) 436#define OPC_PUNPCKHBW (0x68 | P_EXT | P_DATA16) 437#define OPC_PUNPCKHWD (0x69 | P_EXT | P_DATA16) 438#define OPC_PUNPCKHDQ (0x6a | P_EXT | P_DATA16) 439#define OPC_PUNPCKHQDQ (0x6d | P_EXT | P_DATA16) 440#define OPC_PXOR (0xef | P_EXT | P_DATA16) 441#define OPC_POP_r32 (0x58) 442#define OPC_POPCNT (0xb8 | P_EXT | P_SIMDF3) 443#define OPC_PUSH_r32 (0x50) 444#define OPC_PUSH_Iv (0x68) 445#define OPC_PUSH_Ib (0x6a) 446#define OPC_RET (0xc3) 447#define OPC_SETCC (0x90 | P_EXT | P_REXB_RM) /* ... plus cc */ 448#define OPC_SHIFT_1 (0xd1) 449#define OPC_SHIFT_Ib (0xc1) 450#define OPC_SHIFT_cl (0xd3) 451#define OPC_SARX (0xf7 | P_EXT38 | P_SIMDF3) 452#define OPC_SHUFPS (0xc6 | P_EXT) 453#define OPC_SHLX (0xf7 | P_EXT38 | P_DATA16) 454#define OPC_SHRX (0xf7 | P_EXT38 | P_SIMDF2) 455#define OPC_SHRD_Ib (0xac | P_EXT) 456#define OPC_TESTL (0x85) 457#define OPC_TZCNT (0xbc | P_EXT | P_SIMDF3) 458#define OPC_UD2 (0x0b | P_EXT) 459#define OPC_VPBLENDD (0x02 | P_EXT3A | P_DATA16) 460#define OPC_VPBLENDVB (0x4c | P_EXT3A | P_DATA16) 461#define OPC_VPINSRB (0x20 | P_EXT3A | P_DATA16) 462#define OPC_VPINSRW (0xc4 | P_EXT | P_DATA16) 463#define OPC_VBROADCASTSS (0x18 | P_EXT38 | P_DATA16) 464#define OPC_VBROADCASTSD (0x19 | P_EXT38 | P_DATA16) 465#define OPC_VPBROADCASTB (0x78 | P_EXT38 | P_DATA16) 466#define OPC_VPBROADCASTW (0x79 | P_EXT38 | P_DATA16) 467#define OPC_VPBROADCASTD (0x58 | P_EXT38 | P_DATA16) 468#define OPC_VPBROADCASTQ (0x59 | P_EXT38 | P_DATA16) 469#define OPC_VPERMQ (0x00 | P_EXT3A | P_DATA16 | P_REXW) 470#define OPC_VPERM2I128 (0x46 | P_EXT3A | P_DATA16 | P_VEXL) 471#define OPC_VPSLLVD (0x47 | P_EXT38 | P_DATA16) 472#define OPC_VPSLLVQ (0x47 | P_EXT38 | P_DATA16 | P_REXW) 473#define OPC_VPSRAVD (0x46 | P_EXT38 | P_DATA16) 474#define OPC_VPSRLVD (0x45 | P_EXT38 | P_DATA16) 475#define OPC_VPSRLVQ (0x45 | P_EXT38 | P_DATA16 | P_REXW) 476#define OPC_VZEROUPPER (0x77 | P_EXT) 477#define OPC_XCHG_ax_r32 (0x90) 478 479#define OPC_GRP3_Ev (0xf7) 480#define OPC_GRP5 (0xff) 481#define OPC_GRP14 (0x73 | P_EXT | P_DATA16) 482 483/* Group 1 opcode extensions for 0x80-0x83. 484 These are also used as modifiers for OPC_ARITH. */ 485#define ARITH_ADD 0 486#define ARITH_OR 1 487#define ARITH_ADC 2 488#define ARITH_SBB 3 489#define ARITH_AND 4 490#define ARITH_SUB 5 491#define ARITH_XOR 6 492#define ARITH_CMP 7 493 494/* Group 2 opcode extensions for 0xc0, 0xc1, 0xd0-0xd3. */ 495#define SHIFT_ROL 0 496#define SHIFT_ROR 1 497#define SHIFT_SHL 4 498#define SHIFT_SHR 5 499#define SHIFT_SAR 7 500 501/* Group 3 opcode extensions for 0xf6, 0xf7. To be used with OPC_GRP3. */ 502#define EXT3_NOT 2 503#define EXT3_NEG 3 504#define EXT3_MUL 4 505#define EXT3_IMUL 5 506#define EXT3_DIV 6 507#define EXT3_IDIV 7 508 509/* Group 5 opcode extensions for 0xff. To be used with OPC_GRP5. */ 510#define EXT5_INC_Ev 0 511#define EXT5_DEC_Ev 1 512#define EXT5_CALLN_Ev 2 513#define EXT5_JMPN_Ev 4 514 515/* Condition codes to be added to OPC_JCC_{long,short}. */ 516#define JCC_JMP (-1) 517#define JCC_JO 0x0 518#define JCC_JNO 0x1 519#define JCC_JB 0x2 520#define JCC_JAE 0x3 521#define JCC_JE 0x4 522#define JCC_JNE 0x5 523#define JCC_JBE 0x6 524#define JCC_JA 0x7 525#define JCC_JS 0x8 526#define JCC_JNS 0x9 527#define JCC_JP 0xa 528#define JCC_JNP 0xb 529#define JCC_JL 0xc 530#define JCC_JGE 0xd 531#define JCC_JLE 0xe 532#define JCC_JG 0xf 533 534static const uint8_t tcg_cond_to_jcc[] = { 535 [TCG_COND_EQ] = JCC_JE, 536 [TCG_COND_NE] = JCC_JNE, 537 [TCG_COND_LT] = JCC_JL, 538 [TCG_COND_GE] = JCC_JGE, 539 [TCG_COND_LE] = JCC_JLE, 540 [TCG_COND_GT] = JCC_JG, 541 [TCG_COND_LTU] = JCC_JB, 542 [TCG_COND_GEU] = JCC_JAE, 543 [TCG_COND_LEU] = JCC_JBE, 544 [TCG_COND_GTU] = JCC_JA, 545}; 546 547#if TCG_TARGET_REG_BITS == 64 548static void tcg_out_opc(TCGContext *s, int opc, int r, int rm, int x) 549{ 550 int rex; 551 552 if (opc & P_GS) { 553 tcg_out8(s, 0x65); 554 } 555 if (opc & P_DATA16) { 556 /* We should never be asking for both 16 and 64-bit operation. */ 557 tcg_debug_assert((opc & P_REXW) == 0); 558 tcg_out8(s, 0x66); 559 } 560 if (opc & P_SIMDF3) { 561 tcg_out8(s, 0xf3); 562 } else if (opc & P_SIMDF2) { 563 tcg_out8(s, 0xf2); 564 } 565 566 rex = 0; 567 rex |= (opc & P_REXW) ? 0x8 : 0x0; /* REX.W */ 568 rex |= (r & 8) >> 1; /* REX.R */ 569 rex |= (x & 8) >> 2; /* REX.X */ 570 rex |= (rm & 8) >> 3; /* REX.B */ 571 572 /* P_REXB_{R,RM} indicates that the given register is the low byte. 573 For %[abcd]l we need no REX prefix, but for %{si,di,bp,sp}l we do, 574 as otherwise the encoding indicates %[abcd]h. Note that the values 575 that are ORed in merely indicate that the REX byte must be present; 576 those bits get discarded in output. */ 577 rex |= opc & (r >= 4 ? P_REXB_R : 0); 578 rex |= opc & (rm >= 4 ? P_REXB_RM : 0); 579 580 if (rex) { 581 tcg_out8(s, (uint8_t)(rex | 0x40)); 582 } 583 584 if (opc & (P_EXT | P_EXT38 | P_EXT3A)) { 585 tcg_out8(s, 0x0f); 586 if (opc & P_EXT38) { 587 tcg_out8(s, 0x38); 588 } else if (opc & P_EXT3A) { 589 tcg_out8(s, 0x3a); 590 } 591 } 592 593 tcg_out8(s, opc); 594} 595#else 596static void tcg_out_opc(TCGContext *s, int opc) 597{ 598 if (opc & P_DATA16) { 599 tcg_out8(s, 0x66); 600 } 601 if (opc & P_SIMDF3) { 602 tcg_out8(s, 0xf3); 603 } else if (opc & P_SIMDF2) { 604 tcg_out8(s, 0xf2); 605 } 606 if (opc & (P_EXT | P_EXT38 | P_EXT3A)) { 607 tcg_out8(s, 0x0f); 608 if (opc & P_EXT38) { 609 tcg_out8(s, 0x38); 610 } else if (opc & P_EXT3A) { 611 tcg_out8(s, 0x3a); 612 } 613 } 614 tcg_out8(s, opc); 615} 616/* Discard the register arguments to tcg_out_opc early, so as not to penalize 617 the 32-bit compilation paths. This method works with all versions of gcc, 618 whereas relying on optimization may not be able to exclude them. */ 619#define tcg_out_opc(s, opc, r, rm, x) (tcg_out_opc)(s, opc) 620#endif 621 622static void tcg_out_modrm(TCGContext *s, int opc, int r, int rm) 623{ 624 tcg_out_opc(s, opc, r, rm, 0); 625 tcg_out8(s, 0xc0 | (LOWREGMASK(r) << 3) | LOWREGMASK(rm)); 626} 627 628static void tcg_out_vex_opc(TCGContext *s, int opc, int r, int v, 629 int rm, int index) 630{ 631 int tmp; 632 633 /* Use the two byte form if possible, which cannot encode 634 VEX.W, VEX.B, VEX.X, or an m-mmmm field other than P_EXT. */ 635 if ((opc & (P_EXT | P_EXT38 | P_EXT3A | P_REXW)) == P_EXT 636 && ((rm | index) & 8) == 0) { 637 /* Two byte VEX prefix. */ 638 tcg_out8(s, 0xc5); 639 640 tmp = (r & 8 ? 0 : 0x80); /* VEX.R */ 641 } else { 642 /* Three byte VEX prefix. */ 643 tcg_out8(s, 0xc4); 644 645 /* VEX.m-mmmm */ 646 if (opc & P_EXT3A) { 647 tmp = 3; 648 } else if (opc & P_EXT38) { 649 tmp = 2; 650 } else if (opc & P_EXT) { 651 tmp = 1; 652 } else { 653 g_assert_not_reached(); 654 } 655 tmp |= (r & 8 ? 0 : 0x80); /* VEX.R */ 656 tmp |= (index & 8 ? 0 : 0x40); /* VEX.X */ 657 tmp |= (rm & 8 ? 0 : 0x20); /* VEX.B */ 658 tcg_out8(s, tmp); 659 660 tmp = (opc & P_REXW ? 0x80 : 0); /* VEX.W */ 661 } 662 663 tmp |= (opc & P_VEXL ? 0x04 : 0); /* VEX.L */ 664 /* VEX.pp */ 665 if (opc & P_DATA16) { 666 tmp |= 1; /* 0x66 */ 667 } else if (opc & P_SIMDF3) { 668 tmp |= 2; /* 0xf3 */ 669 } else if (opc & P_SIMDF2) { 670 tmp |= 3; /* 0xf2 */ 671 } 672 tmp |= (~v & 15) << 3; /* VEX.vvvv */ 673 tcg_out8(s, tmp); 674 tcg_out8(s, opc); 675} 676 677static void tcg_out_vex_modrm(TCGContext *s, int opc, int r, int v, int rm) 678{ 679 tcg_out_vex_opc(s, opc, r, v, rm, 0); 680 tcg_out8(s, 0xc0 | (LOWREGMASK(r) << 3) | LOWREGMASK(rm)); 681} 682 683/* Output an opcode with a full "rm + (index<<shift) + offset" address mode. 684 We handle either RM and INDEX missing with a negative value. In 64-bit 685 mode for absolute addresses, ~RM is the size of the immediate operand 686 that will follow the instruction. */ 687 688static void tcg_out_sib_offset(TCGContext *s, int r, int rm, int index, 689 int shift, intptr_t offset) 690{ 691 int mod, len; 692 693 if (index < 0 && rm < 0) { 694 if (TCG_TARGET_REG_BITS == 64) { 695 /* Try for a rip-relative addressing mode. This has replaced 696 the 32-bit-mode absolute addressing encoding. */ 697 intptr_t pc = (intptr_t)s->code_ptr + 5 + ~rm; 698 intptr_t disp = offset - pc; 699 if (disp == (int32_t)disp) { 700 tcg_out8(s, (LOWREGMASK(r) << 3) | 5); 701 tcg_out32(s, disp); 702 return; 703 } 704 705 /* Try for an absolute address encoding. This requires the 706 use of the MODRM+SIB encoding and is therefore larger than 707 rip-relative addressing. */ 708 if (offset == (int32_t)offset) { 709 tcg_out8(s, (LOWREGMASK(r) << 3) | 4); 710 tcg_out8(s, (4 << 3) | 5); 711 tcg_out32(s, offset); 712 return; 713 } 714 715 /* ??? The memory isn't directly addressable. */ 716 g_assert_not_reached(); 717 } else { 718 /* Absolute address. */ 719 tcg_out8(s, (r << 3) | 5); 720 tcg_out32(s, offset); 721 return; 722 } 723 } 724 725 /* Find the length of the immediate addend. Note that the encoding 726 that would be used for (%ebp) indicates absolute addressing. */ 727 if (rm < 0) { 728 mod = 0, len = 4, rm = 5; 729 } else if (offset == 0 && LOWREGMASK(rm) != TCG_REG_EBP) { 730 mod = 0, len = 0; 731 } else if (offset == (int8_t)offset) { 732 mod = 0x40, len = 1; 733 } else { 734 mod = 0x80, len = 4; 735 } 736 737 /* Use a single byte MODRM format if possible. Note that the encoding 738 that would be used for %esp is the escape to the two byte form. */ 739 if (index < 0 && LOWREGMASK(rm) != TCG_REG_ESP) { 740 /* Single byte MODRM format. */ 741 tcg_out8(s, mod | (LOWREGMASK(r) << 3) | LOWREGMASK(rm)); 742 } else { 743 /* Two byte MODRM+SIB format. */ 744 745 /* Note that the encoding that would place %esp into the index 746 field indicates no index register. In 64-bit mode, the REX.X 747 bit counts, so %r12 can be used as the index. */ 748 if (index < 0) { 749 index = 4; 750 } else { 751 tcg_debug_assert(index != TCG_REG_ESP); 752 } 753 754 tcg_out8(s, mod | (LOWREGMASK(r) << 3) | 4); 755 tcg_out8(s, (shift << 6) | (LOWREGMASK(index) << 3) | LOWREGMASK(rm)); 756 } 757 758 if (len == 1) { 759 tcg_out8(s, offset); 760 } else if (len == 4) { 761 tcg_out32(s, offset); 762 } 763} 764 765static void tcg_out_modrm_sib_offset(TCGContext *s, int opc, int r, int rm, 766 int index, int shift, intptr_t offset) 767{ 768 tcg_out_opc(s, opc, r, rm < 0 ? 0 : rm, index < 0 ? 0 : index); 769 tcg_out_sib_offset(s, r, rm, index, shift, offset); 770} 771 772static void tcg_out_vex_modrm_sib_offset(TCGContext *s, int opc, int r, int v, 773 int rm, int index, int shift, 774 intptr_t offset) 775{ 776 tcg_out_vex_opc(s, opc, r, v, rm < 0 ? 0 : rm, index < 0 ? 0 : index); 777 tcg_out_sib_offset(s, r, rm, index, shift, offset); 778} 779 780/* A simplification of the above with no index or shift. */ 781static inline void tcg_out_modrm_offset(TCGContext *s, int opc, int r, 782 int rm, intptr_t offset) 783{ 784 tcg_out_modrm_sib_offset(s, opc, r, rm, -1, 0, offset); 785} 786 787static inline void tcg_out_vex_modrm_offset(TCGContext *s, int opc, int r, 788 int v, int rm, intptr_t offset) 789{ 790 tcg_out_vex_modrm_sib_offset(s, opc, r, v, rm, -1, 0, offset); 791} 792 793/* Output an opcode with an expected reference to the constant pool. */ 794static inline void tcg_out_modrm_pool(TCGContext *s, int opc, int r) 795{ 796 tcg_out_opc(s, opc, r, 0, 0); 797 /* Absolute for 32-bit, pc-relative for 64-bit. */ 798 tcg_out8(s, LOWREGMASK(r) << 3 | 5); 799 tcg_out32(s, 0); 800} 801 802/* Output an opcode with an expected reference to the constant pool. */ 803static inline void tcg_out_vex_modrm_pool(TCGContext *s, int opc, int r) 804{ 805 tcg_out_vex_opc(s, opc, r, 0, 0, 0); 806 /* Absolute for 32-bit, pc-relative for 64-bit. */ 807 tcg_out8(s, LOWREGMASK(r) << 3 | 5); 808 tcg_out32(s, 0); 809} 810 811/* Generate dest op= src. Uses the same ARITH_* codes as tgen_arithi. */ 812static inline void tgen_arithr(TCGContext *s, int subop, int dest, int src) 813{ 814 /* Propagate an opcode prefix, such as P_REXW. */ 815 int ext = subop & ~0x7; 816 subop &= 0x7; 817 818 tcg_out_modrm(s, OPC_ARITH_GvEv + (subop << 3) + ext, dest, src); 819} 820 821static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg) 822{ 823 int rexw = 0; 824 825 if (arg == ret) { 826 return true; 827 } 828 switch (type) { 829 case TCG_TYPE_I64: 830 rexw = P_REXW; 831 /* fallthru */ 832 case TCG_TYPE_I32: 833 if (ret < 16) { 834 if (arg < 16) { 835 tcg_out_modrm(s, OPC_MOVL_GvEv + rexw, ret, arg); 836 } else { 837 tcg_out_vex_modrm(s, OPC_MOVD_EyVy + rexw, arg, 0, ret); 838 } 839 } else { 840 if (arg < 16) { 841 tcg_out_vex_modrm(s, OPC_MOVD_VyEy + rexw, ret, 0, arg); 842 } else { 843 tcg_out_vex_modrm(s, OPC_MOVQ_VqWq, ret, 0, arg); 844 } 845 } 846 break; 847 848 case TCG_TYPE_V64: 849 tcg_debug_assert(ret >= 16 && arg >= 16); 850 tcg_out_vex_modrm(s, OPC_MOVQ_VqWq, ret, 0, arg); 851 break; 852 case TCG_TYPE_V128: 853 tcg_debug_assert(ret >= 16 && arg >= 16); 854 tcg_out_vex_modrm(s, OPC_MOVDQA_VxWx, ret, 0, arg); 855 break; 856 case TCG_TYPE_V256: 857 tcg_debug_assert(ret >= 16 && arg >= 16); 858 tcg_out_vex_modrm(s, OPC_MOVDQA_VxWx | P_VEXL, ret, 0, arg); 859 break; 860 861 default: 862 g_assert_not_reached(); 863 } 864 return true; 865} 866 867static const int avx2_dup_insn[4] = { 868 OPC_VPBROADCASTB, OPC_VPBROADCASTW, 869 OPC_VPBROADCASTD, OPC_VPBROADCASTQ, 870}; 871 872static bool tcg_out_dup_vec(TCGContext *s, TCGType type, unsigned vece, 873 TCGReg r, TCGReg a) 874{ 875 if (have_avx2) { 876 int vex_l = (type == TCG_TYPE_V256 ? P_VEXL : 0); 877 tcg_out_vex_modrm(s, avx2_dup_insn[vece] + vex_l, r, 0, a); 878 } else { 879 switch (vece) { 880 case MO_8: 881 /* ??? With zero in a register, use PSHUFB. */ 882 tcg_out_vex_modrm(s, OPC_PUNPCKLBW, r, a, a); 883 a = r; 884 /* FALLTHRU */ 885 case MO_16: 886 tcg_out_vex_modrm(s, OPC_PUNPCKLWD, r, a, a); 887 a = r; 888 /* FALLTHRU */ 889 case MO_32: 890 tcg_out_vex_modrm(s, OPC_PSHUFD, r, 0, a); 891 /* imm8 operand: all output lanes selected from input lane 0. */ 892 tcg_out8(s, 0); 893 break; 894 case MO_64: 895 tcg_out_vex_modrm(s, OPC_PUNPCKLQDQ, r, a, a); 896 break; 897 default: 898 g_assert_not_reached(); 899 } 900 } 901 return true; 902} 903 904static bool tcg_out_dupm_vec(TCGContext *s, TCGType type, unsigned vece, 905 TCGReg r, TCGReg base, intptr_t offset) 906{ 907 if (have_avx2) { 908 int vex_l = (type == TCG_TYPE_V256 ? P_VEXL : 0); 909 tcg_out_vex_modrm_offset(s, avx2_dup_insn[vece] + vex_l, 910 r, 0, base, offset); 911 } else { 912 switch (vece) { 913 case MO_64: 914 tcg_out_vex_modrm_offset(s, OPC_MOVDDUP, r, 0, base, offset); 915 break; 916 case MO_32: 917 tcg_out_vex_modrm_offset(s, OPC_VBROADCASTSS, r, 0, base, offset); 918 break; 919 case MO_16: 920 tcg_out_vex_modrm_offset(s, OPC_VPINSRW, r, r, base, offset); 921 tcg_out8(s, 0); /* imm8 */ 922 tcg_out_dup_vec(s, type, vece, r, r); 923 break; 924 case MO_8: 925 tcg_out_vex_modrm_offset(s, OPC_VPINSRB, r, r, base, offset); 926 tcg_out8(s, 0); /* imm8 */ 927 tcg_out_dup_vec(s, type, vece, r, r); 928 break; 929 default: 930 g_assert_not_reached(); 931 } 932 } 933 return true; 934} 935 936static void tcg_out_dupi_vec(TCGContext *s, TCGType type, 937 TCGReg ret, tcg_target_long arg) 938{ 939 int vex_l = (type == TCG_TYPE_V256 ? P_VEXL : 0); 940 941 if (arg == 0) { 942 tcg_out_vex_modrm(s, OPC_PXOR, ret, ret, ret); 943 return; 944 } 945 if (arg == -1) { 946 tcg_out_vex_modrm(s, OPC_PCMPEQB + vex_l, ret, ret, ret); 947 return; 948 } 949 950 if (TCG_TARGET_REG_BITS == 64) { 951 if (type == TCG_TYPE_V64) { 952 tcg_out_vex_modrm_pool(s, OPC_MOVQ_VqWq, ret); 953 } else if (have_avx2) { 954 tcg_out_vex_modrm_pool(s, OPC_VPBROADCASTQ + vex_l, ret); 955 } else { 956 tcg_out_vex_modrm_pool(s, OPC_MOVDDUP, ret); 957 } 958 new_pool_label(s, arg, R_386_PC32, s->code_ptr - 4, -4); 959 } else { 960 if (have_avx2) { 961 tcg_out_vex_modrm_pool(s, OPC_VPBROADCASTD + vex_l, ret); 962 } else { 963 tcg_out_vex_modrm_pool(s, OPC_VBROADCASTSS, ret); 964 } 965 new_pool_label(s, arg, R_386_32, s->code_ptr - 4, 0); 966 } 967} 968 969static void tcg_out_movi(TCGContext *s, TCGType type, 970 TCGReg ret, tcg_target_long arg) 971{ 972 tcg_target_long diff; 973 974 switch (type) { 975 case TCG_TYPE_I32: 976#if TCG_TARGET_REG_BITS == 64 977 case TCG_TYPE_I64: 978#endif 979 if (ret < 16) { 980 break; 981 } 982 /* fallthru */ 983 case TCG_TYPE_V64: 984 case TCG_TYPE_V128: 985 case TCG_TYPE_V256: 986 tcg_debug_assert(ret >= 16); 987 tcg_out_dupi_vec(s, type, ret, arg); 988 return; 989 default: 990 g_assert_not_reached(); 991 } 992 993 if (arg == 0) { 994 tgen_arithr(s, ARITH_XOR, ret, ret); 995 return; 996 } 997 if (arg == (uint32_t)arg || type == TCG_TYPE_I32) { 998 tcg_out_opc(s, OPC_MOVL_Iv + LOWREGMASK(ret), 0, ret, 0); 999 tcg_out32(s, arg); 1000 return; 1001 } 1002 if (arg == (int32_t)arg) { 1003 tcg_out_modrm(s, OPC_MOVL_EvIz + P_REXW, 0, ret); 1004 tcg_out32(s, arg); 1005 return; 1006 } 1007 1008 /* Try a 7 byte pc-relative lea before the 10 byte movq. */ 1009 diff = arg - ((uintptr_t)s->code_ptr + 7); 1010 if (diff == (int32_t)diff) { 1011 tcg_out_opc(s, OPC_LEA | P_REXW, ret, 0, 0); 1012 tcg_out8(s, (LOWREGMASK(ret) << 3) | 5); 1013 tcg_out32(s, diff); 1014 return; 1015 } 1016 1017 tcg_out_opc(s, OPC_MOVL_Iv + P_REXW + LOWREGMASK(ret), 0, ret, 0); 1018 tcg_out64(s, arg); 1019} 1020 1021static inline void tcg_out_pushi(TCGContext *s, tcg_target_long val) 1022{ 1023 if (val == (int8_t)val) { 1024 tcg_out_opc(s, OPC_PUSH_Ib, 0, 0, 0); 1025 tcg_out8(s, val); 1026 } else if (val == (int32_t)val) { 1027 tcg_out_opc(s, OPC_PUSH_Iv, 0, 0, 0); 1028 tcg_out32(s, val); 1029 } else { 1030 tcg_abort(); 1031 } 1032} 1033 1034static inline void tcg_out_mb(TCGContext *s, TCGArg a0) 1035{ 1036 /* Given the strength of x86 memory ordering, we only need care for 1037 store-load ordering. Experimentally, "lock orl $0,0(%esp)" is 1038 faster than "mfence", so don't bother with the sse insn. */ 1039 if (a0 & TCG_MO_ST_LD) { 1040 tcg_out8(s, 0xf0); 1041 tcg_out_modrm_offset(s, OPC_ARITH_EvIb, ARITH_OR, TCG_REG_ESP, 0); 1042 tcg_out8(s, 0); 1043 } 1044} 1045 1046static inline void tcg_out_push(TCGContext *s, int reg) 1047{ 1048 tcg_out_opc(s, OPC_PUSH_r32 + LOWREGMASK(reg), 0, reg, 0); 1049} 1050 1051static inline void tcg_out_pop(TCGContext *s, int reg) 1052{ 1053 tcg_out_opc(s, OPC_POP_r32 + LOWREGMASK(reg), 0, reg, 0); 1054} 1055 1056static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg ret, 1057 TCGReg arg1, intptr_t arg2) 1058{ 1059 switch (type) { 1060 case TCG_TYPE_I32: 1061 if (ret < 16) { 1062 tcg_out_modrm_offset(s, OPC_MOVL_GvEv, ret, arg1, arg2); 1063 } else { 1064 tcg_out_vex_modrm_offset(s, OPC_MOVD_VyEy, ret, 0, arg1, arg2); 1065 } 1066 break; 1067 case TCG_TYPE_I64: 1068 if (ret < 16) { 1069 tcg_out_modrm_offset(s, OPC_MOVL_GvEv | P_REXW, ret, arg1, arg2); 1070 break; 1071 } 1072 /* FALLTHRU */ 1073 case TCG_TYPE_V64: 1074 /* There is no instruction that can validate 8-byte alignment. */ 1075 tcg_debug_assert(ret >= 16); 1076 tcg_out_vex_modrm_offset(s, OPC_MOVQ_VqWq, ret, 0, arg1, arg2); 1077 break; 1078 case TCG_TYPE_V128: 1079 /* 1080 * The gvec infrastructure is asserts that v128 vector loads 1081 * and stores use a 16-byte aligned offset. Validate that the 1082 * final pointer is aligned by using an insn that will SIGSEGV. 1083 */ 1084 tcg_debug_assert(ret >= 16); 1085 tcg_out_vex_modrm_offset(s, OPC_MOVDQA_VxWx, ret, 0, arg1, arg2); 1086 break; 1087 case TCG_TYPE_V256: 1088 /* 1089 * The gvec infrastructure only requires 16-byte alignment, 1090 * so here we must use an unaligned load. 1091 */ 1092 tcg_debug_assert(ret >= 16); 1093 tcg_out_vex_modrm_offset(s, OPC_MOVDQU_VxWx | P_VEXL, 1094 ret, 0, arg1, arg2); 1095 break; 1096 default: 1097 g_assert_not_reached(); 1098 } 1099} 1100 1101static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, 1102 TCGReg arg1, intptr_t arg2) 1103{ 1104 switch (type) { 1105 case TCG_TYPE_I32: 1106 if (arg < 16) { 1107 tcg_out_modrm_offset(s, OPC_MOVL_EvGv, arg, arg1, arg2); 1108 } else { 1109 tcg_out_vex_modrm_offset(s, OPC_MOVD_EyVy, arg, 0, arg1, arg2); 1110 } 1111 break; 1112 case TCG_TYPE_I64: 1113 if (arg < 16) { 1114 tcg_out_modrm_offset(s, OPC_MOVL_EvGv | P_REXW, arg, arg1, arg2); 1115 break; 1116 } 1117 /* FALLTHRU */ 1118 case TCG_TYPE_V64: 1119 /* There is no instruction that can validate 8-byte alignment. */ 1120 tcg_debug_assert(arg >= 16); 1121 tcg_out_vex_modrm_offset(s, OPC_MOVQ_WqVq, arg, 0, arg1, arg2); 1122 break; 1123 case TCG_TYPE_V128: 1124 /* 1125 * The gvec infrastructure is asserts that v128 vector loads 1126 * and stores use a 16-byte aligned offset. Validate that the 1127 * final pointer is aligned by using an insn that will SIGSEGV. 1128 */ 1129 tcg_debug_assert(arg >= 16); 1130 tcg_out_vex_modrm_offset(s, OPC_MOVDQA_WxVx, arg, 0, arg1, arg2); 1131 break; 1132 case TCG_TYPE_V256: 1133 /* 1134 * The gvec infrastructure only requires 16-byte alignment, 1135 * so here we must use an unaligned store. 1136 */ 1137 tcg_debug_assert(arg >= 16); 1138 tcg_out_vex_modrm_offset(s, OPC_MOVDQU_WxVx | P_VEXL, 1139 arg, 0, arg1, arg2); 1140 break; 1141 default: 1142 g_assert_not_reached(); 1143 } 1144} 1145 1146static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, 1147 TCGReg base, intptr_t ofs) 1148{ 1149 int rexw = 0; 1150 if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I64) { 1151 if (val != (int32_t)val) { 1152 return false; 1153 } 1154 rexw = P_REXW; 1155 } else if (type != TCG_TYPE_I32) { 1156 return false; 1157 } 1158 tcg_out_modrm_offset(s, OPC_MOVL_EvIz | rexw, 0, base, ofs); 1159 tcg_out32(s, val); 1160 return true; 1161} 1162 1163static void tcg_out_shifti(TCGContext *s, int subopc, int reg, int count) 1164{ 1165 /* Propagate an opcode prefix, such as P_DATA16. */ 1166 int ext = subopc & ~0x7; 1167 subopc &= 0x7; 1168 1169 if (count == 1) { 1170 tcg_out_modrm(s, OPC_SHIFT_1 + ext, subopc, reg); 1171 } else { 1172 tcg_out_modrm(s, OPC_SHIFT_Ib + ext, subopc, reg); 1173 tcg_out8(s, count); 1174 } 1175} 1176 1177static inline void tcg_out_bswap32(TCGContext *s, int reg) 1178{ 1179 tcg_out_opc(s, OPC_BSWAP + LOWREGMASK(reg), 0, reg, 0); 1180} 1181 1182static inline void tcg_out_rolw_8(TCGContext *s, int reg) 1183{ 1184 tcg_out_shifti(s, SHIFT_ROL + P_DATA16, reg, 8); 1185} 1186 1187static inline void tcg_out_ext8u(TCGContext *s, int dest, int src) 1188{ 1189 /* movzbl */ 1190 tcg_debug_assert(src < 4 || TCG_TARGET_REG_BITS == 64); 1191 tcg_out_modrm(s, OPC_MOVZBL + P_REXB_RM, dest, src); 1192} 1193 1194static void tcg_out_ext8s(TCGContext *s, int dest, int src, int rexw) 1195{ 1196 /* movsbl */ 1197 tcg_debug_assert(src < 4 || TCG_TARGET_REG_BITS == 64); 1198 tcg_out_modrm(s, OPC_MOVSBL + P_REXB_RM + rexw, dest, src); 1199} 1200 1201static inline void tcg_out_ext16u(TCGContext *s, int dest, int src) 1202{ 1203 /* movzwl */ 1204 tcg_out_modrm(s, OPC_MOVZWL, dest, src); 1205} 1206 1207static inline void tcg_out_ext16s(TCGContext *s, int dest, int src, int rexw) 1208{ 1209 /* movsw[lq] */ 1210 tcg_out_modrm(s, OPC_MOVSWL + rexw, dest, src); 1211} 1212 1213static inline void tcg_out_ext32u(TCGContext *s, int dest, int src) 1214{ 1215 /* 32-bit mov zero extends. */ 1216 tcg_out_modrm(s, OPC_MOVL_GvEv, dest, src); 1217} 1218 1219static inline void tcg_out_ext32s(TCGContext *s, int dest, int src) 1220{ 1221 tcg_out_modrm(s, OPC_MOVSLQ, dest, src); 1222} 1223 1224static inline void tcg_out_bswap64(TCGContext *s, int reg) 1225{ 1226 tcg_out_opc(s, OPC_BSWAP + P_REXW + LOWREGMASK(reg), 0, reg, 0); 1227} 1228 1229static void tgen_arithi(TCGContext *s, int c, int r0, 1230 tcg_target_long val, int cf) 1231{ 1232 int rexw = 0; 1233 1234 if (TCG_TARGET_REG_BITS == 64) { 1235 rexw = c & -8; 1236 c &= 7; 1237 } 1238 1239 /* ??? While INC is 2 bytes shorter than ADDL $1, they also induce 1240 partial flags update stalls on Pentium4 and are not recommended 1241 by current Intel optimization manuals. */ 1242 if (!cf && (c == ARITH_ADD || c == ARITH_SUB) && (val == 1 || val == -1)) { 1243 int is_inc = (c == ARITH_ADD) ^ (val < 0); 1244 if (TCG_TARGET_REG_BITS == 64) { 1245 /* The single-byte increment encodings are re-tasked as the 1246 REX prefixes. Use the MODRM encoding. */ 1247 tcg_out_modrm(s, OPC_GRP5 + rexw, 1248 (is_inc ? EXT5_INC_Ev : EXT5_DEC_Ev), r0); 1249 } else { 1250 tcg_out8(s, (is_inc ? OPC_INC_r32 : OPC_DEC_r32) + r0); 1251 } 1252 return; 1253 } 1254 1255 if (c == ARITH_AND) { 1256 if (TCG_TARGET_REG_BITS == 64) { 1257 if (val == 0xffffffffu) { 1258 tcg_out_ext32u(s, r0, r0); 1259 return; 1260 } 1261 if (val == (uint32_t)val) { 1262 /* AND with no high bits set can use a 32-bit operation. */ 1263 rexw = 0; 1264 } 1265 } 1266 if (val == 0xffu && (r0 < 4 || TCG_TARGET_REG_BITS == 64)) { 1267 tcg_out_ext8u(s, r0, r0); 1268 return; 1269 } 1270 if (val == 0xffffu) { 1271 tcg_out_ext16u(s, r0, r0); 1272 return; 1273 } 1274 } 1275 1276 if (val == (int8_t)val) { 1277 tcg_out_modrm(s, OPC_ARITH_EvIb + rexw, c, r0); 1278 tcg_out8(s, val); 1279 return; 1280 } 1281 if (rexw == 0 || val == (int32_t)val) { 1282 tcg_out_modrm(s, OPC_ARITH_EvIz + rexw, c, r0); 1283 tcg_out32(s, val); 1284 return; 1285 } 1286 1287 tcg_abort(); 1288} 1289 1290static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val) 1291{ 1292 if (val != 0) { 1293 tgen_arithi(s, ARITH_ADD + P_REXW, reg, val, 0); 1294 } 1295} 1296 1297/* Use SMALL != 0 to force a short forward branch. */ 1298static void tcg_out_jxx(TCGContext *s, int opc, TCGLabel *l, int small) 1299{ 1300 int32_t val, val1; 1301 1302 if (l->has_value) { 1303 val = tcg_pcrel_diff(s, l->u.value_ptr); 1304 val1 = val - 2; 1305 if ((int8_t)val1 == val1) { 1306 if (opc == -1) { 1307 tcg_out8(s, OPC_JMP_short); 1308 } else { 1309 tcg_out8(s, OPC_JCC_short + opc); 1310 } 1311 tcg_out8(s, val1); 1312 } else { 1313 if (small) { 1314 tcg_abort(); 1315 } 1316 if (opc == -1) { 1317 tcg_out8(s, OPC_JMP_long); 1318 tcg_out32(s, val - 5); 1319 } else { 1320 tcg_out_opc(s, OPC_JCC_long + opc, 0, 0, 0); 1321 tcg_out32(s, val - 6); 1322 } 1323 } 1324 } else if (small) { 1325 if (opc == -1) { 1326 tcg_out8(s, OPC_JMP_short); 1327 } else { 1328 tcg_out8(s, OPC_JCC_short + opc); 1329 } 1330 tcg_out_reloc(s, s->code_ptr, R_386_PC8, l, -1); 1331 s->code_ptr += 1; 1332 } else { 1333 if (opc == -1) { 1334 tcg_out8(s, OPC_JMP_long); 1335 } else { 1336 tcg_out_opc(s, OPC_JCC_long + opc, 0, 0, 0); 1337 } 1338 tcg_out_reloc(s, s->code_ptr, R_386_PC32, l, -4); 1339 s->code_ptr += 4; 1340 } 1341} 1342 1343static void tcg_out_cmp(TCGContext *s, TCGArg arg1, TCGArg arg2, 1344 int const_arg2, int rexw) 1345{ 1346 if (const_arg2) { 1347 if (arg2 == 0) { 1348 /* test r, r */ 1349 tcg_out_modrm(s, OPC_TESTL + rexw, arg1, arg1); 1350 } else { 1351 tgen_arithi(s, ARITH_CMP + rexw, arg1, arg2, 0); 1352 } 1353 } else { 1354 tgen_arithr(s, ARITH_CMP + rexw, arg1, arg2); 1355 } 1356} 1357 1358static void tcg_out_brcond32(TCGContext *s, TCGCond cond, 1359 TCGArg arg1, TCGArg arg2, int const_arg2, 1360 TCGLabel *label, int small) 1361{ 1362 tcg_out_cmp(s, arg1, arg2, const_arg2, 0); 1363 tcg_out_jxx(s, tcg_cond_to_jcc[cond], label, small); 1364} 1365 1366#if TCG_TARGET_REG_BITS == 64 1367static void tcg_out_brcond64(TCGContext *s, TCGCond cond, 1368 TCGArg arg1, TCGArg arg2, int const_arg2, 1369 TCGLabel *label, int small) 1370{ 1371 tcg_out_cmp(s, arg1, arg2, const_arg2, P_REXW); 1372 tcg_out_jxx(s, tcg_cond_to_jcc[cond], label, small); 1373} 1374#else 1375/* XXX: we implement it at the target level to avoid having to 1376 handle cross basic blocks temporaries */ 1377static void tcg_out_brcond2(TCGContext *s, const TCGArg *args, 1378 const int *const_args, int small) 1379{ 1380 TCGLabel *label_next = gen_new_label(); 1381 TCGLabel *label_this = arg_label(args[5]); 1382 1383 switch(args[4]) { 1384 case TCG_COND_EQ: 1385 tcg_out_brcond32(s, TCG_COND_NE, args[0], args[2], const_args[2], 1386 label_next, 1); 1387 tcg_out_brcond32(s, TCG_COND_EQ, args[1], args[3], const_args[3], 1388 label_this, small); 1389 break; 1390 case TCG_COND_NE: 1391 tcg_out_brcond32(s, TCG_COND_NE, args[0], args[2], const_args[2], 1392 label_this, small); 1393 tcg_out_brcond32(s, TCG_COND_NE, args[1], args[3], const_args[3], 1394 label_this, small); 1395 break; 1396 case TCG_COND_LT: 1397 tcg_out_brcond32(s, TCG_COND_LT, args[1], args[3], const_args[3], 1398 label_this, small); 1399 tcg_out_jxx(s, JCC_JNE, label_next, 1); 1400 tcg_out_brcond32(s, TCG_COND_LTU, args[0], args[2], const_args[2], 1401 label_this, small); 1402 break; 1403 case TCG_COND_LE: 1404 tcg_out_brcond32(s, TCG_COND_LT, args[1], args[3], const_args[3], 1405 label_this, small); 1406 tcg_out_jxx(s, JCC_JNE, label_next, 1); 1407 tcg_out_brcond32(s, TCG_COND_LEU, args[0], args[2], const_args[2], 1408 label_this, small); 1409 break; 1410 case TCG_COND_GT: 1411 tcg_out_brcond32(s, TCG_COND_GT, args[1], args[3], const_args[3], 1412 label_this, small); 1413 tcg_out_jxx(s, JCC_JNE, label_next, 1); 1414 tcg_out_brcond32(s, TCG_COND_GTU, args[0], args[2], const_args[2], 1415 label_this, small); 1416 break; 1417 case TCG_COND_GE: 1418 tcg_out_brcond32(s, TCG_COND_GT, args[1], args[3], const_args[3], 1419 label_this, small); 1420 tcg_out_jxx(s, JCC_JNE, label_next, 1); 1421 tcg_out_brcond32(s, TCG_COND_GEU, args[0], args[2], const_args[2], 1422 label_this, small); 1423 break; 1424 case TCG_COND_LTU: 1425 tcg_out_brcond32(s, TCG_COND_LTU, args[1], args[3], const_args[3], 1426 label_this, small); 1427 tcg_out_jxx(s, JCC_JNE, label_next, 1); 1428 tcg_out_brcond32(s, TCG_COND_LTU, args[0], args[2], const_args[2], 1429 label_this, small); 1430 break; 1431 case TCG_COND_LEU: 1432 tcg_out_brcond32(s, TCG_COND_LTU, args[1], args[3], const_args[3], 1433 label_this, small); 1434 tcg_out_jxx(s, JCC_JNE, label_next, 1); 1435 tcg_out_brcond32(s, TCG_COND_LEU, args[0], args[2], const_args[2], 1436 label_this, small); 1437 break; 1438 case TCG_COND_GTU: 1439 tcg_out_brcond32(s, TCG_COND_GTU, args[1], args[3], const_args[3], 1440 label_this, small); 1441 tcg_out_jxx(s, JCC_JNE, label_next, 1); 1442 tcg_out_brcond32(s, TCG_COND_GTU, args[0], args[2], const_args[2], 1443 label_this, small); 1444 break; 1445 case TCG_COND_GEU: 1446 tcg_out_brcond32(s, TCG_COND_GTU, args[1], args[3], const_args[3], 1447 label_this, small); 1448 tcg_out_jxx(s, JCC_JNE, label_next, 1); 1449 tcg_out_brcond32(s, TCG_COND_GEU, args[0], args[2], const_args[2], 1450 label_this, small); 1451 break; 1452 default: 1453 tcg_abort(); 1454 } 1455 tcg_out_label(s, label_next, s->code_ptr); 1456} 1457#endif 1458 1459static void tcg_out_setcond32(TCGContext *s, TCGCond cond, TCGArg dest, 1460 TCGArg arg1, TCGArg arg2, int const_arg2) 1461{ 1462 tcg_out_cmp(s, arg1, arg2, const_arg2, 0); 1463 tcg_out_modrm(s, OPC_SETCC | tcg_cond_to_jcc[cond], 0, dest); 1464 tcg_out_ext8u(s, dest, dest); 1465} 1466 1467#if TCG_TARGET_REG_BITS == 64 1468static void tcg_out_setcond64(TCGContext *s, TCGCond cond, TCGArg dest, 1469 TCGArg arg1, TCGArg arg2, int const_arg2) 1470{ 1471 tcg_out_cmp(s, arg1, arg2, const_arg2, P_REXW); 1472 tcg_out_modrm(s, OPC_SETCC | tcg_cond_to_jcc[cond], 0, dest); 1473 tcg_out_ext8u(s, dest, dest); 1474} 1475#else 1476static void tcg_out_setcond2(TCGContext *s, const TCGArg *args, 1477 const int *const_args) 1478{ 1479 TCGArg new_args[6]; 1480 TCGLabel *label_true, *label_over; 1481 1482 memcpy(new_args, args+1, 5*sizeof(TCGArg)); 1483 1484 if (args[0] == args[1] || args[0] == args[2] 1485 || (!const_args[3] && args[0] == args[3]) 1486 || (!const_args[4] && args[0] == args[4])) { 1487 /* When the destination overlaps with one of the argument 1488 registers, don't do anything tricky. */ 1489 label_true = gen_new_label(); 1490 label_over = gen_new_label(); 1491 1492 new_args[5] = label_arg(label_true); 1493 tcg_out_brcond2(s, new_args, const_args+1, 1); 1494 1495 tcg_out_movi(s, TCG_TYPE_I32, args[0], 0); 1496 tcg_out_jxx(s, JCC_JMP, label_over, 1); 1497 tcg_out_label(s, label_true, s->code_ptr); 1498 1499 tcg_out_movi(s, TCG_TYPE_I32, args[0], 1); 1500 tcg_out_label(s, label_over, s->code_ptr); 1501 } else { 1502 /* When the destination does not overlap one of the arguments, 1503 clear the destination first, jump if cond false, and emit an 1504 increment in the true case. This results in smaller code. */ 1505 1506 tcg_out_movi(s, TCG_TYPE_I32, args[0], 0); 1507 1508 label_over = gen_new_label(); 1509 new_args[4] = tcg_invert_cond(new_args[4]); 1510 new_args[5] = label_arg(label_over); 1511 tcg_out_brcond2(s, new_args, const_args+1, 1); 1512 1513 tgen_arithi(s, ARITH_ADD, args[0], 1, 0); 1514 tcg_out_label(s, label_over, s->code_ptr); 1515 } 1516} 1517#endif 1518 1519static void tcg_out_cmov(TCGContext *s, TCGCond cond, int rexw, 1520 TCGReg dest, TCGReg v1) 1521{ 1522 if (have_cmov) { 1523 tcg_out_modrm(s, OPC_CMOVCC | tcg_cond_to_jcc[cond] | rexw, dest, v1); 1524 } else { 1525 TCGLabel *over = gen_new_label(); 1526 tcg_out_jxx(s, tcg_cond_to_jcc[tcg_invert_cond(cond)], over, 1); 1527 tcg_out_mov(s, TCG_TYPE_I32, dest, v1); 1528 tcg_out_label(s, over, s->code_ptr); 1529 } 1530} 1531 1532static void tcg_out_movcond32(TCGContext *s, TCGCond cond, TCGReg dest, 1533 TCGReg c1, TCGArg c2, int const_c2, 1534 TCGReg v1) 1535{ 1536 tcg_out_cmp(s, c1, c2, const_c2, 0); 1537 tcg_out_cmov(s, cond, 0, dest, v1); 1538} 1539 1540#if TCG_TARGET_REG_BITS == 64 1541static void tcg_out_movcond64(TCGContext *s, TCGCond cond, TCGReg dest, 1542 TCGReg c1, TCGArg c2, int const_c2, 1543 TCGReg v1) 1544{ 1545 tcg_out_cmp(s, c1, c2, const_c2, P_REXW); 1546 tcg_out_cmov(s, cond, P_REXW, dest, v1); 1547} 1548#endif 1549 1550static void tcg_out_ctz(TCGContext *s, int rexw, TCGReg dest, TCGReg arg1, 1551 TCGArg arg2, bool const_a2) 1552{ 1553 if (have_bmi1) { 1554 tcg_out_modrm(s, OPC_TZCNT + rexw, dest, arg1); 1555 if (const_a2) { 1556 tcg_debug_assert(arg2 == (rexw ? 64 : 32)); 1557 } else { 1558 tcg_debug_assert(dest != arg2); 1559 tcg_out_cmov(s, TCG_COND_LTU, rexw, dest, arg2); 1560 } 1561 } else { 1562 tcg_debug_assert(dest != arg2); 1563 tcg_out_modrm(s, OPC_BSF + rexw, dest, arg1); 1564 tcg_out_cmov(s, TCG_COND_EQ, rexw, dest, arg2); 1565 } 1566} 1567 1568static void tcg_out_clz(TCGContext *s, int rexw, TCGReg dest, TCGReg arg1, 1569 TCGArg arg2, bool const_a2) 1570{ 1571 if (have_lzcnt) { 1572 tcg_out_modrm(s, OPC_LZCNT + rexw, dest, arg1); 1573 if (const_a2) { 1574 tcg_debug_assert(arg2 == (rexw ? 64 : 32)); 1575 } else { 1576 tcg_debug_assert(dest != arg2); 1577 tcg_out_cmov(s, TCG_COND_LTU, rexw, dest, arg2); 1578 } 1579 } else { 1580 tcg_debug_assert(!const_a2); 1581 tcg_debug_assert(dest != arg1); 1582 tcg_debug_assert(dest != arg2); 1583 1584 /* Recall that the output of BSR is the index not the count. */ 1585 tcg_out_modrm(s, OPC_BSR + rexw, dest, arg1); 1586 tgen_arithi(s, ARITH_XOR + rexw, dest, rexw ? 63 : 31, 0); 1587 1588 /* Since we have destroyed the flags from BSR, we have to re-test. */ 1589 tcg_out_cmp(s, arg1, 0, 1, rexw); 1590 tcg_out_cmov(s, TCG_COND_EQ, rexw, dest, arg2); 1591 } 1592} 1593 1594static void tcg_out_branch(TCGContext *s, int call, tcg_insn_unit *dest) 1595{ 1596 intptr_t disp = tcg_pcrel_diff(s, dest) - 5; 1597 1598 if (disp == (int32_t)disp) { 1599 tcg_out_opc(s, call ? OPC_CALL_Jz : OPC_JMP_long, 0, 0, 0); 1600 tcg_out32(s, disp); 1601 } else { 1602 /* rip-relative addressing into the constant pool. 1603 This is 6 + 8 = 14 bytes, as compared to using an 1604 an immediate load 10 + 6 = 16 bytes, plus we may 1605 be able to re-use the pool constant for more calls. */ 1606 tcg_out_opc(s, OPC_GRP5, 0, 0, 0); 1607 tcg_out8(s, (call ? EXT5_CALLN_Ev : EXT5_JMPN_Ev) << 3 | 5); 1608 new_pool_label(s, (uintptr_t)dest, R_386_PC32, s->code_ptr, -4); 1609 tcg_out32(s, 0); 1610 } 1611} 1612 1613static inline void tcg_out_call(TCGContext *s, tcg_insn_unit *dest) 1614{ 1615 tcg_out_branch(s, 1, dest); 1616} 1617 1618static void tcg_out_jmp(TCGContext *s, tcg_insn_unit *dest) 1619{ 1620 tcg_out_branch(s, 0, dest); 1621} 1622 1623static void tcg_out_nopn(TCGContext *s, int n) 1624{ 1625 int i; 1626 /* Emit 1 or 2 operand size prefixes for the standard one byte nop, 1627 * "xchg %eax,%eax", forming "xchg %ax,%ax". All cores accept the 1628 * duplicate prefix, and all of the interesting recent cores can 1629 * decode and discard the duplicates in a single cycle. 1630 */ 1631 tcg_debug_assert(n >= 1); 1632 for (i = 1; i < n; ++i) { 1633 tcg_out8(s, 0x66); 1634 } 1635 tcg_out8(s, 0x90); 1636} 1637 1638#if defined(CONFIG_SOFTMMU) 1639#include "../tcg-ldst.c.inc" 1640 1641/* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr, 1642 * int mmu_idx, uintptr_t ra) 1643 */ 1644static void * const qemu_ld_helpers[16] = { 1645 [MO_UB] = helper_ret_ldub_mmu, 1646 [MO_LEUW] = helper_le_lduw_mmu, 1647 [MO_LEUL] = helper_le_ldul_mmu, 1648 [MO_LEQ] = helper_le_ldq_mmu, 1649 [MO_BEUW] = helper_be_lduw_mmu, 1650 [MO_BEUL] = helper_be_ldul_mmu, 1651 [MO_BEQ] = helper_be_ldq_mmu, 1652}; 1653 1654/* helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr, 1655 * uintxx_t val, int mmu_idx, uintptr_t ra) 1656 */ 1657static void * const qemu_st_helpers[16] = { 1658 [MO_UB] = helper_ret_stb_mmu, 1659 [MO_LEUW] = helper_le_stw_mmu, 1660 [MO_LEUL] = helper_le_stl_mmu, 1661 [MO_LEQ] = helper_le_stq_mmu, 1662 [MO_BEUW] = helper_be_stw_mmu, 1663 [MO_BEUL] = helper_be_stl_mmu, 1664 [MO_BEQ] = helper_be_stq_mmu, 1665}; 1666 1667/* Perform the TLB load and compare. 1668 1669 Inputs: 1670 ADDRLO and ADDRHI contain the low and high part of the address. 1671 1672 MEM_INDEX and S_BITS are the memory context and log2 size of the load. 1673 1674 WHICH is the offset into the CPUTLBEntry structure of the slot to read. 1675 This should be offsetof addr_read or addr_write. 1676 1677 Outputs: 1678 LABEL_PTRS is filled with 1 (32-bit addresses) or 2 (64-bit addresses) 1679 positions of the displacements of forward jumps to the TLB miss case. 1680 1681 Second argument register is loaded with the low part of the address. 1682 In the TLB hit case, it has been adjusted as indicated by the TLB 1683 and so is a host address. In the TLB miss case, it continues to 1684 hold a guest address. 1685 1686 First argument register is clobbered. */ 1687 1688static inline void tcg_out_tlb_load(TCGContext *s, TCGReg addrlo, TCGReg addrhi, 1689 int mem_index, MemOp opc, 1690 tcg_insn_unit **label_ptr, int which) 1691{ 1692 const TCGReg r0 = TCG_REG_L0; 1693 const TCGReg r1 = TCG_REG_L1; 1694 TCGType ttype = TCG_TYPE_I32; 1695 TCGType tlbtype = TCG_TYPE_I32; 1696 int trexw = 0, hrexw = 0, tlbrexw = 0; 1697 unsigned a_bits = get_alignment_bits(opc); 1698 unsigned s_bits = opc & MO_SIZE; 1699 unsigned a_mask = (1 << a_bits) - 1; 1700 unsigned s_mask = (1 << s_bits) - 1; 1701 target_ulong tlb_mask; 1702 1703 if (TCG_TARGET_REG_BITS == 64) { 1704 if (TARGET_LONG_BITS == 64) { 1705 ttype = TCG_TYPE_I64; 1706 trexw = P_REXW; 1707 } 1708 if (TCG_TYPE_PTR == TCG_TYPE_I64) { 1709 hrexw = P_REXW; 1710 if (TARGET_PAGE_BITS + CPU_TLB_DYN_MAX_BITS > 32) { 1711 tlbtype = TCG_TYPE_I64; 1712 tlbrexw = P_REXW; 1713 } 1714 } 1715 } 1716 1717 tcg_out_mov(s, tlbtype, r0, addrlo); 1718 tcg_out_shifti(s, SHIFT_SHR + tlbrexw, r0, 1719 TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); 1720 1721 tcg_out_modrm_offset(s, OPC_AND_GvEv + trexw, r0, TCG_AREG0, 1722 TLB_MASK_TABLE_OFS(mem_index) + 1723 offsetof(CPUTLBDescFast, mask)); 1724 1725 tcg_out_modrm_offset(s, OPC_ADD_GvEv + hrexw, r0, TCG_AREG0, 1726 TLB_MASK_TABLE_OFS(mem_index) + 1727 offsetof(CPUTLBDescFast, table)); 1728 1729 /* If the required alignment is at least as large as the access, simply 1730 copy the address and mask. For lesser alignments, check that we don't 1731 cross pages for the complete access. */ 1732 if (a_bits >= s_bits) { 1733 tcg_out_mov(s, ttype, r1, addrlo); 1734 } else { 1735 tcg_out_modrm_offset(s, OPC_LEA + trexw, r1, addrlo, s_mask - a_mask); 1736 } 1737 tlb_mask = (target_ulong)TARGET_PAGE_MASK | a_mask; 1738 tgen_arithi(s, ARITH_AND + trexw, r1, tlb_mask, 0); 1739 1740 /* cmp 0(r0), r1 */ 1741 tcg_out_modrm_offset(s, OPC_CMP_GvEv + trexw, r1, r0, which); 1742 1743 /* Prepare for both the fast path add of the tlb addend, and the slow 1744 path function argument setup. */ 1745 tcg_out_mov(s, ttype, r1, addrlo); 1746 1747 /* jne slow_path */ 1748 tcg_out_opc(s, OPC_JCC_long + JCC_JNE, 0, 0, 0); 1749 label_ptr[0] = s->code_ptr; 1750 s->code_ptr += 4; 1751 1752 if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) { 1753 /* cmp 4(r0), addrhi */ 1754 tcg_out_modrm_offset(s, OPC_CMP_GvEv, addrhi, r0, which + 4); 1755 1756 /* jne slow_path */ 1757 tcg_out_opc(s, OPC_JCC_long + JCC_JNE, 0, 0, 0); 1758 label_ptr[1] = s->code_ptr; 1759 s->code_ptr += 4; 1760 } 1761 1762 /* TLB Hit. */ 1763 1764 /* add addend(r0), r1 */ 1765 tcg_out_modrm_offset(s, OPC_ADD_GvEv + hrexw, r1, r0, 1766 offsetof(CPUTLBEntry, addend)); 1767} 1768 1769/* 1770 * Record the context of a call to the out of line helper code for the slow path 1771 * for a load or store, so that we can later generate the correct helper code 1772 */ 1773static void add_qemu_ldst_label(TCGContext *s, bool is_ld, bool is_64, 1774 TCGMemOpIdx oi, 1775 TCGReg datalo, TCGReg datahi, 1776 TCGReg addrlo, TCGReg addrhi, 1777 tcg_insn_unit *raddr, 1778 tcg_insn_unit **label_ptr) 1779{ 1780 TCGLabelQemuLdst *label = new_ldst_label(s); 1781 1782 label->is_ld = is_ld; 1783 label->oi = oi; 1784 label->type = is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32; 1785 label->datalo_reg = datalo; 1786 label->datahi_reg = datahi; 1787 label->addrlo_reg = addrlo; 1788 label->addrhi_reg = addrhi; 1789 label->raddr = raddr; 1790 label->label_ptr[0] = label_ptr[0]; 1791 if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) { 1792 label->label_ptr[1] = label_ptr[1]; 1793 } 1794} 1795 1796/* 1797 * Generate code for the slow path for a load at the end of block 1798 */ 1799static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l) 1800{ 1801 TCGMemOpIdx oi = l->oi; 1802 MemOp opc = get_memop(oi); 1803 TCGReg data_reg; 1804 tcg_insn_unit **label_ptr = &l->label_ptr[0]; 1805 int rexw = (l->type == TCG_TYPE_I64 ? P_REXW : 0); 1806 1807 /* resolve label address */ 1808 tcg_patch32(label_ptr[0], s->code_ptr - label_ptr[0] - 4); 1809 if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) { 1810 tcg_patch32(label_ptr[1], s->code_ptr - label_ptr[1] - 4); 1811 } 1812 1813 if (TCG_TARGET_REG_BITS == 32) { 1814 int ofs = 0; 1815 1816 tcg_out_st(s, TCG_TYPE_PTR, TCG_AREG0, TCG_REG_ESP, ofs); 1817 ofs += 4; 1818 1819 tcg_out_st(s, TCG_TYPE_I32, l->addrlo_reg, TCG_REG_ESP, ofs); 1820 ofs += 4; 1821 1822 if (TARGET_LONG_BITS == 64) { 1823 tcg_out_st(s, TCG_TYPE_I32, l->addrhi_reg, TCG_REG_ESP, ofs); 1824 ofs += 4; 1825 } 1826 1827 tcg_out_sti(s, TCG_TYPE_I32, oi, TCG_REG_ESP, ofs); 1828 ofs += 4; 1829 1830 tcg_out_sti(s, TCG_TYPE_PTR, (uintptr_t)l->raddr, TCG_REG_ESP, ofs); 1831 } else { 1832 tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0); 1833 /* The second argument is already loaded with addrlo. */ 1834 tcg_out_movi(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[2], oi); 1835 tcg_out_movi(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[3], 1836 (uintptr_t)l->raddr); 1837 } 1838 1839 tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SIZE)]); 1840 1841 data_reg = l->datalo_reg; 1842 switch (opc & MO_SSIZE) { 1843 case MO_SB: 1844 tcg_out_ext8s(s, data_reg, TCG_REG_EAX, rexw); 1845 break; 1846 case MO_SW: 1847 tcg_out_ext16s(s, data_reg, TCG_REG_EAX, rexw); 1848 break; 1849#if TCG_TARGET_REG_BITS == 64 1850 case MO_SL: 1851 tcg_out_ext32s(s, data_reg, TCG_REG_EAX); 1852 break; 1853#endif 1854 case MO_UB: 1855 case MO_UW: 1856 /* Note that the helpers have zero-extended to tcg_target_long. */ 1857 case MO_UL: 1858 tcg_out_mov(s, TCG_TYPE_I32, data_reg, TCG_REG_EAX); 1859 break; 1860 case MO_Q: 1861 if (TCG_TARGET_REG_BITS == 64) { 1862 tcg_out_mov(s, TCG_TYPE_I64, data_reg, TCG_REG_RAX); 1863 } else if (data_reg == TCG_REG_EDX) { 1864 /* xchg %edx, %eax */ 1865 tcg_out_opc(s, OPC_XCHG_ax_r32 + TCG_REG_EDX, 0, 0, 0); 1866 tcg_out_mov(s, TCG_TYPE_I32, l->datahi_reg, TCG_REG_EAX); 1867 } else { 1868 tcg_out_mov(s, TCG_TYPE_I32, data_reg, TCG_REG_EAX); 1869 tcg_out_mov(s, TCG_TYPE_I32, l->datahi_reg, TCG_REG_EDX); 1870 } 1871 break; 1872 default: 1873 tcg_abort(); 1874 } 1875 1876 /* Jump to the code corresponding to next IR of qemu_st */ 1877 tcg_out_jmp(s, l->raddr); 1878 return true; 1879} 1880 1881/* 1882 * Generate code for the slow path for a store at the end of block 1883 */ 1884static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) 1885{ 1886 TCGMemOpIdx oi = l->oi; 1887 MemOp opc = get_memop(oi); 1888 MemOp s_bits = opc & MO_SIZE; 1889 tcg_insn_unit **label_ptr = &l->label_ptr[0]; 1890 TCGReg retaddr; 1891 1892 /* resolve label address */ 1893 tcg_patch32(label_ptr[0], s->code_ptr - label_ptr[0] - 4); 1894 if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) { 1895 tcg_patch32(label_ptr[1], s->code_ptr - label_ptr[1] - 4); 1896 } 1897 1898 if (TCG_TARGET_REG_BITS == 32) { 1899 int ofs = 0; 1900 1901 tcg_out_st(s, TCG_TYPE_PTR, TCG_AREG0, TCG_REG_ESP, ofs); 1902 ofs += 4; 1903 1904 tcg_out_st(s, TCG_TYPE_I32, l->addrlo_reg, TCG_REG_ESP, ofs); 1905 ofs += 4; 1906 1907 if (TARGET_LONG_BITS == 64) { 1908 tcg_out_st(s, TCG_TYPE_I32, l->addrhi_reg, TCG_REG_ESP, ofs); 1909 ofs += 4; 1910 } 1911 1912 tcg_out_st(s, TCG_TYPE_I32, l->datalo_reg, TCG_REG_ESP, ofs); 1913 ofs += 4; 1914 1915 if (s_bits == MO_64) { 1916 tcg_out_st(s, TCG_TYPE_I32, l->datahi_reg, TCG_REG_ESP, ofs); 1917 ofs += 4; 1918 } 1919 1920 tcg_out_sti(s, TCG_TYPE_I32, oi, TCG_REG_ESP, ofs); 1921 ofs += 4; 1922 1923 retaddr = TCG_REG_EAX; 1924 tcg_out_movi(s, TCG_TYPE_PTR, retaddr, (uintptr_t)l->raddr); 1925 tcg_out_st(s, TCG_TYPE_PTR, retaddr, TCG_REG_ESP, ofs); 1926 } else { 1927 tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0); 1928 /* The second argument is already loaded with addrlo. */ 1929 tcg_out_mov(s, (s_bits == MO_64 ? TCG_TYPE_I64 : TCG_TYPE_I32), 1930 tcg_target_call_iarg_regs[2], l->datalo_reg); 1931 tcg_out_movi(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[3], oi); 1932 1933 if (ARRAY_SIZE(tcg_target_call_iarg_regs) > 4) { 1934 retaddr = tcg_target_call_iarg_regs[4]; 1935 tcg_out_movi(s, TCG_TYPE_PTR, retaddr, (uintptr_t)l->raddr); 1936 } else { 1937 retaddr = TCG_REG_RAX; 1938 tcg_out_movi(s, TCG_TYPE_PTR, retaddr, (uintptr_t)l->raddr); 1939 tcg_out_st(s, TCG_TYPE_PTR, retaddr, TCG_REG_ESP, 1940 TCG_TARGET_CALL_STACK_OFFSET); 1941 } 1942 } 1943 1944 /* "Tail call" to the helper, with the return address back inline. */ 1945 tcg_out_push(s, retaddr); 1946 tcg_out_jmp(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]); 1947 return true; 1948} 1949#elif TCG_TARGET_REG_BITS == 32 1950# define x86_guest_base_seg 0 1951# define x86_guest_base_index -1 1952# define x86_guest_base_offset guest_base 1953#else 1954static int x86_guest_base_seg; 1955static int x86_guest_base_index = -1; 1956static int32_t x86_guest_base_offset; 1957# if defined(__x86_64__) && defined(__linux__) 1958# include <asm/prctl.h> 1959# include <sys/prctl.h> 1960int arch_prctl(int code, unsigned long addr); 1961static inline int setup_guest_base_seg(void) 1962{ 1963 if (arch_prctl(ARCH_SET_GS, guest_base) == 0) { 1964 return P_GS; 1965 } 1966 return 0; 1967} 1968# elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__) 1969# include <machine/sysarch.h> 1970static inline int setup_guest_base_seg(void) 1971{ 1972 if (sysarch(AMD64_SET_GSBASE, &guest_base) == 0) { 1973 return P_GS; 1974 } 1975 return 0; 1976} 1977# else 1978static inline int setup_guest_base_seg(void) 1979{ 1980 return 0; 1981} 1982# endif 1983#endif /* SOFTMMU */ 1984 1985static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg datalo, TCGReg datahi, 1986 TCGReg base, int index, intptr_t ofs, 1987 int seg, bool is64, MemOp memop) 1988{ 1989 const MemOp real_bswap = memop & MO_BSWAP; 1990 MemOp bswap = real_bswap; 1991 int rexw = is64 * P_REXW; 1992 int movop = OPC_MOVL_GvEv; 1993 1994 if (have_movbe && real_bswap) { 1995 bswap = 0; 1996 movop = OPC_MOVBE_GyMy; 1997 } 1998 1999 switch (memop & MO_SSIZE) { 2000 case MO_UB: 2001 tcg_out_modrm_sib_offset(s, OPC_MOVZBL + seg, datalo, 2002 base, index, 0, ofs); 2003 break; 2004 case MO_SB: 2005 tcg_out_modrm_sib_offset(s, OPC_MOVSBL + rexw + seg, datalo, 2006 base, index, 0, ofs); 2007 break; 2008 case MO_UW: 2009 tcg_out_modrm_sib_offset(s, OPC_MOVZWL + seg, datalo, 2010 base, index, 0, ofs); 2011 if (real_bswap) { 2012 tcg_out_rolw_8(s, datalo); 2013 } 2014 break; 2015 case MO_SW: 2016 if (real_bswap) { 2017 if (have_movbe) { 2018 tcg_out_modrm_sib_offset(s, OPC_MOVBE_GyMy + P_DATA16 + seg, 2019 datalo, base, index, 0, ofs); 2020 } else { 2021 tcg_out_modrm_sib_offset(s, OPC_MOVZWL + seg, datalo, 2022 base, index, 0, ofs); 2023 tcg_out_rolw_8(s, datalo); 2024 } 2025 tcg_out_modrm(s, OPC_MOVSWL + rexw, datalo, datalo); 2026 } else { 2027 tcg_out_modrm_sib_offset(s, OPC_MOVSWL + rexw + seg, 2028 datalo, base, index, 0, ofs); 2029 } 2030 break; 2031 case MO_UL: 2032 tcg_out_modrm_sib_offset(s, movop + seg, datalo, base, index, 0, ofs); 2033 if (bswap) { 2034 tcg_out_bswap32(s, datalo); 2035 } 2036 break; 2037#if TCG_TARGET_REG_BITS == 64 2038 case MO_SL: 2039 if (real_bswap) { 2040 tcg_out_modrm_sib_offset(s, movop + seg, datalo, 2041 base, index, 0, ofs); 2042 if (bswap) { 2043 tcg_out_bswap32(s, datalo); 2044 } 2045 tcg_out_ext32s(s, datalo, datalo); 2046 } else { 2047 tcg_out_modrm_sib_offset(s, OPC_MOVSLQ + seg, datalo, 2048 base, index, 0, ofs); 2049 } 2050 break; 2051#endif 2052 case MO_Q: 2053 if (TCG_TARGET_REG_BITS == 64) { 2054 tcg_out_modrm_sib_offset(s, movop + P_REXW + seg, datalo, 2055 base, index, 0, ofs); 2056 if (bswap) { 2057 tcg_out_bswap64(s, datalo); 2058 } 2059 } else { 2060 if (real_bswap) { 2061 int t = datalo; 2062 datalo = datahi; 2063 datahi = t; 2064 } 2065 if (base != datalo) { 2066 tcg_out_modrm_sib_offset(s, movop + seg, datalo, 2067 base, index, 0, ofs); 2068 tcg_out_modrm_sib_offset(s, movop + seg, datahi, 2069 base, index, 0, ofs + 4); 2070 } else { 2071 tcg_out_modrm_sib_offset(s, movop + seg, datahi, 2072 base, index, 0, ofs + 4); 2073 tcg_out_modrm_sib_offset(s, movop + seg, datalo, 2074 base, index, 0, ofs); 2075 } 2076 if (bswap) { 2077 tcg_out_bswap32(s, datalo); 2078 tcg_out_bswap32(s, datahi); 2079 } 2080 } 2081 break; 2082 default: 2083 tcg_abort(); 2084 } 2085} 2086 2087/* XXX: qemu_ld and qemu_st could be modified to clobber only EDX and 2088 EAX. It will be useful once fixed registers globals are less 2089 common. */ 2090static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is64) 2091{ 2092 TCGReg datalo, datahi, addrlo; 2093 TCGReg addrhi __attribute__((unused)); 2094 TCGMemOpIdx oi; 2095 MemOp opc; 2096#if defined(CONFIG_SOFTMMU) 2097 int mem_index; 2098 tcg_insn_unit *label_ptr[2]; 2099#endif 2100 2101 datalo = *args++; 2102 datahi = (TCG_TARGET_REG_BITS == 32 && is64 ? *args++ : 0); 2103 addrlo = *args++; 2104 addrhi = (TARGET_LONG_BITS > TCG_TARGET_REG_BITS ? *args++ : 0); 2105 oi = *args++; 2106 opc = get_memop(oi); 2107 2108#if defined(CONFIG_SOFTMMU) 2109 mem_index = get_mmuidx(oi); 2110 2111 tcg_out_tlb_load(s, addrlo, addrhi, mem_index, opc, 2112 label_ptr, offsetof(CPUTLBEntry, addr_read)); 2113 2114 /* TLB Hit. */ 2115 tcg_out_qemu_ld_direct(s, datalo, datahi, TCG_REG_L1, -1, 0, 0, is64, opc); 2116 2117 /* Record the current context of a load into ldst label */ 2118 add_qemu_ldst_label(s, true, is64, oi, datalo, datahi, addrlo, addrhi, 2119 s->code_ptr, label_ptr); 2120#else 2121 tcg_out_qemu_ld_direct(s, datalo, datahi, addrlo, x86_guest_base_index, 2122 x86_guest_base_offset, x86_guest_base_seg, 2123 is64, opc); 2124#endif 2125} 2126 2127static void tcg_out_qemu_st_direct(TCGContext *s, TCGReg datalo, TCGReg datahi, 2128 TCGReg base, int index, intptr_t ofs, 2129 int seg, MemOp memop) 2130{ 2131 /* ??? Ideally we wouldn't need a scratch register. For user-only, 2132 we could perform the bswap twice to restore the original value 2133 instead of moving to the scratch. But as it is, the L constraint 2134 means that TCG_REG_L0 is definitely free here. */ 2135 const TCGReg scratch = TCG_REG_L0; 2136 const MemOp real_bswap = memop & MO_BSWAP; 2137 MemOp bswap = real_bswap; 2138 int movop = OPC_MOVL_EvGv; 2139 2140 if (have_movbe && real_bswap) { 2141 bswap = 0; 2142 movop = OPC_MOVBE_MyGy; 2143 } 2144 2145 switch (memop & MO_SIZE) { 2146 case MO_8: 2147 /* In 32-bit mode, 8-bit stores can only happen from [abcd]x. 2148 Use the scratch register if necessary. */ 2149 if (TCG_TARGET_REG_BITS == 32 && datalo >= 4) { 2150 tcg_out_mov(s, TCG_TYPE_I32, scratch, datalo); 2151 datalo = scratch; 2152 } 2153 tcg_out_modrm_sib_offset(s, OPC_MOVB_EvGv + P_REXB_R + seg, 2154 datalo, base, index, 0, ofs); 2155 break; 2156 case MO_16: 2157 if (bswap) { 2158 tcg_out_mov(s, TCG_TYPE_I32, scratch, datalo); 2159 tcg_out_rolw_8(s, scratch); 2160 datalo = scratch; 2161 } 2162 tcg_out_modrm_sib_offset(s, movop + P_DATA16 + seg, datalo, 2163 base, index, 0, ofs); 2164 break; 2165 case MO_32: 2166 if (bswap) { 2167 tcg_out_mov(s, TCG_TYPE_I32, scratch, datalo); 2168 tcg_out_bswap32(s, scratch); 2169 datalo = scratch; 2170 } 2171 tcg_out_modrm_sib_offset(s, movop + seg, datalo, base, index, 0, ofs); 2172 break; 2173 case MO_64: 2174 if (TCG_TARGET_REG_BITS == 64) { 2175 if (bswap) { 2176 tcg_out_mov(s, TCG_TYPE_I64, scratch, datalo); 2177 tcg_out_bswap64(s, scratch); 2178 datalo = scratch; 2179 } 2180 tcg_out_modrm_sib_offset(s, movop + P_REXW + seg, datalo, 2181 base, index, 0, ofs); 2182 } else if (bswap) { 2183 tcg_out_mov(s, TCG_TYPE_I32, scratch, datahi); 2184 tcg_out_bswap32(s, scratch); 2185 tcg_out_modrm_sib_offset(s, OPC_MOVL_EvGv + seg, scratch, 2186 base, index, 0, ofs); 2187 tcg_out_mov(s, TCG_TYPE_I32, scratch, datalo); 2188 tcg_out_bswap32(s, scratch); 2189 tcg_out_modrm_sib_offset(s, OPC_MOVL_EvGv + seg, scratch, 2190 base, index, 0, ofs + 4); 2191 } else { 2192 if (real_bswap) { 2193 int t = datalo; 2194 datalo = datahi; 2195 datahi = t; 2196 } 2197 tcg_out_modrm_sib_offset(s, movop + seg, datalo, 2198 base, index, 0, ofs); 2199 tcg_out_modrm_sib_offset(s, movop + seg, datahi, 2200 base, index, 0, ofs + 4); 2201 } 2202 break; 2203 default: 2204 tcg_abort(); 2205 } 2206} 2207 2208static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64) 2209{ 2210 TCGReg datalo, datahi, addrlo; 2211 TCGReg addrhi __attribute__((unused)); 2212 TCGMemOpIdx oi; 2213 MemOp opc; 2214#if defined(CONFIG_SOFTMMU) 2215 int mem_index; 2216 tcg_insn_unit *label_ptr[2]; 2217#endif 2218 2219 datalo = *args++; 2220 datahi = (TCG_TARGET_REG_BITS == 32 && is64 ? *args++ : 0); 2221 addrlo = *args++; 2222 addrhi = (TARGET_LONG_BITS > TCG_TARGET_REG_BITS ? *args++ : 0); 2223 oi = *args++; 2224 opc = get_memop(oi); 2225 2226#if defined(CONFIG_SOFTMMU) 2227 mem_index = get_mmuidx(oi); 2228 2229 tcg_out_tlb_load(s, addrlo, addrhi, mem_index, opc, 2230 label_ptr, offsetof(CPUTLBEntry, addr_write)); 2231 2232 /* TLB Hit. */ 2233 tcg_out_qemu_st_direct(s, datalo, datahi, TCG_REG_L1, -1, 0, 0, opc); 2234 2235 /* Record the current context of a store into ldst label */ 2236 add_qemu_ldst_label(s, false, is64, oi, datalo, datahi, addrlo, addrhi, 2237 s->code_ptr, label_ptr); 2238#else 2239 tcg_out_qemu_st_direct(s, datalo, datahi, addrlo, x86_guest_base_index, 2240 x86_guest_base_offset, x86_guest_base_seg, opc); 2241#endif 2242} 2243 2244static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, 2245 const TCGArg *args, const int *const_args) 2246{ 2247 TCGArg a0, a1, a2; 2248 int c, const_a2, vexop, rexw = 0; 2249 2250#if TCG_TARGET_REG_BITS == 64 2251# define OP_32_64(x) \ 2252 case glue(glue(INDEX_op_, x), _i64): \ 2253 rexw = P_REXW; /* FALLTHRU */ \ 2254 case glue(glue(INDEX_op_, x), _i32) 2255#else 2256# define OP_32_64(x) \ 2257 case glue(glue(INDEX_op_, x), _i32) 2258#endif 2259 2260 /* Hoist the loads of the most common arguments. */ 2261 a0 = args[0]; 2262 a1 = args[1]; 2263 a2 = args[2]; 2264 const_a2 = const_args[2]; 2265 2266 switch (opc) { 2267 case INDEX_op_exit_tb: 2268 /* Reuse the zeroing that exists for goto_ptr. */ 2269 if (a0 == 0) { 2270 tcg_out_jmp(s, s->code_gen_epilogue); 2271 } else { 2272 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_EAX, a0); 2273 tcg_out_jmp(s, tb_ret_addr); 2274 } 2275 break; 2276 case INDEX_op_goto_tb: 2277 if (s->tb_jmp_insn_offset) { 2278 /* direct jump method */ 2279 int gap; 2280 /* jump displacement must be aligned for atomic patching; 2281 * see if we need to add extra nops before jump 2282 */ 2283 gap = tcg_pcrel_diff(s, QEMU_ALIGN_PTR_UP(s->code_ptr + 1, 4)); 2284 if (gap != 1) { 2285 tcg_out_nopn(s, gap - 1); 2286 } 2287 tcg_out8(s, OPC_JMP_long); /* jmp im */ 2288 s->tb_jmp_insn_offset[a0] = tcg_current_code_size(s); 2289 tcg_out32(s, 0); 2290 } else { 2291 /* indirect jump method */ 2292 tcg_out_modrm_offset(s, OPC_GRP5, EXT5_JMPN_Ev, -1, 2293 (intptr_t)(s->tb_jmp_target_addr + a0)); 2294 } 2295 set_jmp_reset_offset(s, a0); 2296 break; 2297 case INDEX_op_goto_ptr: 2298 /* jmp to the given host address (could be epilogue) */ 2299 tcg_out_modrm(s, OPC_GRP5, EXT5_JMPN_Ev, a0); 2300 break; 2301 case INDEX_op_br: 2302 tcg_out_jxx(s, JCC_JMP, arg_label(a0), 0); 2303 break; 2304 OP_32_64(ld8u): 2305 /* Note that we can ignore REXW for the zero-extend to 64-bit. */ 2306 tcg_out_modrm_offset(s, OPC_MOVZBL, a0, a1, a2); 2307 break; 2308 OP_32_64(ld8s): 2309 tcg_out_modrm_offset(s, OPC_MOVSBL + rexw, a0, a1, a2); 2310 break; 2311 OP_32_64(ld16u): 2312 /* Note that we can ignore REXW for the zero-extend to 64-bit. */ 2313 tcg_out_modrm_offset(s, OPC_MOVZWL, a0, a1, a2); 2314 break; 2315 OP_32_64(ld16s): 2316 tcg_out_modrm_offset(s, OPC_MOVSWL + rexw, a0, a1, a2); 2317 break; 2318#if TCG_TARGET_REG_BITS == 64 2319 case INDEX_op_ld32u_i64: 2320#endif 2321 case INDEX_op_ld_i32: 2322 tcg_out_ld(s, TCG_TYPE_I32, a0, a1, a2); 2323 break; 2324 2325 OP_32_64(st8): 2326 if (const_args[0]) { 2327 tcg_out_modrm_offset(s, OPC_MOVB_EvIz, 0, a1, a2); 2328 tcg_out8(s, a0); 2329 } else { 2330 tcg_out_modrm_offset(s, OPC_MOVB_EvGv | P_REXB_R, a0, a1, a2); 2331 } 2332 break; 2333 OP_32_64(st16): 2334 if (const_args[0]) { 2335 tcg_out_modrm_offset(s, OPC_MOVL_EvIz | P_DATA16, 0, a1, a2); 2336 tcg_out16(s, a0); 2337 } else { 2338 tcg_out_modrm_offset(s, OPC_MOVL_EvGv | P_DATA16, a0, a1, a2); 2339 } 2340 break; 2341#if TCG_TARGET_REG_BITS == 64 2342 case INDEX_op_st32_i64: 2343#endif 2344 case INDEX_op_st_i32: 2345 if (const_args[0]) { 2346 tcg_out_modrm_offset(s, OPC_MOVL_EvIz, 0, a1, a2); 2347 tcg_out32(s, a0); 2348 } else { 2349 tcg_out_st(s, TCG_TYPE_I32, a0, a1, a2); 2350 } 2351 break; 2352 2353 OP_32_64(add): 2354 /* For 3-operand addition, use LEA. */ 2355 if (a0 != a1) { 2356 TCGArg c3 = 0; 2357 if (const_a2) { 2358 c3 = a2, a2 = -1; 2359 } else if (a0 == a2) { 2360 /* Watch out for dest = src + dest, since we've removed 2361 the matching constraint on the add. */ 2362 tgen_arithr(s, ARITH_ADD + rexw, a0, a1); 2363 break; 2364 } 2365 2366 tcg_out_modrm_sib_offset(s, OPC_LEA + rexw, a0, a1, a2, 0, c3); 2367 break; 2368 } 2369 c = ARITH_ADD; 2370 goto gen_arith; 2371 OP_32_64(sub): 2372 c = ARITH_SUB; 2373 goto gen_arith; 2374 OP_32_64(and): 2375 c = ARITH_AND; 2376 goto gen_arith; 2377 OP_32_64(or): 2378 c = ARITH_OR; 2379 goto gen_arith; 2380 OP_32_64(xor): 2381 c = ARITH_XOR; 2382 goto gen_arith; 2383 gen_arith: 2384 if (const_a2) { 2385 tgen_arithi(s, c + rexw, a0, a2, 0); 2386 } else { 2387 tgen_arithr(s, c + rexw, a0, a2); 2388 } 2389 break; 2390 2391 OP_32_64(andc): 2392 if (const_a2) { 2393 tcg_out_mov(s, rexw ? TCG_TYPE_I64 : TCG_TYPE_I32, a0, a1); 2394 tgen_arithi(s, ARITH_AND + rexw, a0, ~a2, 0); 2395 } else { 2396 tcg_out_vex_modrm(s, OPC_ANDN + rexw, a0, a2, a1); 2397 } 2398 break; 2399 2400 OP_32_64(mul): 2401 if (const_a2) { 2402 int32_t val; 2403 val = a2; 2404 if (val == (int8_t)val) { 2405 tcg_out_modrm(s, OPC_IMUL_GvEvIb + rexw, a0, a0); 2406 tcg_out8(s, val); 2407 } else { 2408 tcg_out_modrm(s, OPC_IMUL_GvEvIz + rexw, a0, a0); 2409 tcg_out32(s, val); 2410 } 2411 } else { 2412 tcg_out_modrm(s, OPC_IMUL_GvEv + rexw, a0, a2); 2413 } 2414 break; 2415 2416 OP_32_64(div2): 2417 tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_IDIV, args[4]); 2418 break; 2419 OP_32_64(divu2): 2420 tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_DIV, args[4]); 2421 break; 2422 2423 OP_32_64(shl): 2424 /* For small constant 3-operand shift, use LEA. */ 2425 if (const_a2 && a0 != a1 && (a2 - 1) < 3) { 2426 if (a2 - 1 == 0) { 2427 /* shl $1,a1,a0 -> lea (a1,a1),a0 */ 2428 tcg_out_modrm_sib_offset(s, OPC_LEA + rexw, a0, a1, a1, 0, 0); 2429 } else { 2430 /* shl $n,a1,a0 -> lea 0(,a1,n),a0 */ 2431 tcg_out_modrm_sib_offset(s, OPC_LEA + rexw, a0, -1, a1, a2, 0); 2432 } 2433 break; 2434 } 2435 c = SHIFT_SHL; 2436 vexop = OPC_SHLX; 2437 goto gen_shift_maybe_vex; 2438 OP_32_64(shr): 2439 c = SHIFT_SHR; 2440 vexop = OPC_SHRX; 2441 goto gen_shift_maybe_vex; 2442 OP_32_64(sar): 2443 c = SHIFT_SAR; 2444 vexop = OPC_SARX; 2445 goto gen_shift_maybe_vex; 2446 OP_32_64(rotl): 2447 c = SHIFT_ROL; 2448 goto gen_shift; 2449 OP_32_64(rotr): 2450 c = SHIFT_ROR; 2451 goto gen_shift; 2452 gen_shift_maybe_vex: 2453 if (have_bmi2) { 2454 if (!const_a2) { 2455 tcg_out_vex_modrm(s, vexop + rexw, a0, a2, a1); 2456 break; 2457 } 2458 tcg_out_mov(s, rexw ? TCG_TYPE_I64 : TCG_TYPE_I32, a0, a1); 2459 } 2460 /* FALLTHRU */ 2461 gen_shift: 2462 if (const_a2) { 2463 tcg_out_shifti(s, c + rexw, a0, a2); 2464 } else { 2465 tcg_out_modrm(s, OPC_SHIFT_cl + rexw, c, a0); 2466 } 2467 break; 2468 2469 OP_32_64(ctz): 2470 tcg_out_ctz(s, rexw, args[0], args[1], args[2], const_args[2]); 2471 break; 2472 OP_32_64(clz): 2473 tcg_out_clz(s, rexw, args[0], args[1], args[2], const_args[2]); 2474 break; 2475 OP_32_64(ctpop): 2476 tcg_out_modrm(s, OPC_POPCNT + rexw, a0, a1); 2477 break; 2478 2479 case INDEX_op_brcond_i32: 2480 tcg_out_brcond32(s, a2, a0, a1, const_args[1], arg_label(args[3]), 0); 2481 break; 2482 case INDEX_op_setcond_i32: 2483 tcg_out_setcond32(s, args[3], a0, a1, a2, const_a2); 2484 break; 2485 case INDEX_op_movcond_i32: 2486 tcg_out_movcond32(s, args[5], a0, a1, a2, const_a2, args[3]); 2487 break; 2488 2489 OP_32_64(bswap16): 2490 tcg_out_rolw_8(s, a0); 2491 break; 2492 OP_32_64(bswap32): 2493 tcg_out_bswap32(s, a0); 2494 break; 2495 2496 OP_32_64(neg): 2497 tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_NEG, a0); 2498 break; 2499 OP_32_64(not): 2500 tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_NOT, a0); 2501 break; 2502 2503 OP_32_64(ext8s): 2504 tcg_out_ext8s(s, a0, a1, rexw); 2505 break; 2506 OP_32_64(ext16s): 2507 tcg_out_ext16s(s, a0, a1, rexw); 2508 break; 2509 OP_32_64(ext8u): 2510 tcg_out_ext8u(s, a0, a1); 2511 break; 2512 OP_32_64(ext16u): 2513 tcg_out_ext16u(s, a0, a1); 2514 break; 2515 2516 case INDEX_op_qemu_ld_i32: 2517 tcg_out_qemu_ld(s, args, 0); 2518 break; 2519 case INDEX_op_qemu_ld_i64: 2520 tcg_out_qemu_ld(s, args, 1); 2521 break; 2522 case INDEX_op_qemu_st_i32: 2523 tcg_out_qemu_st(s, args, 0); 2524 break; 2525 case INDEX_op_qemu_st_i64: 2526 tcg_out_qemu_st(s, args, 1); 2527 break; 2528 2529 OP_32_64(mulu2): 2530 tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_MUL, args[3]); 2531 break; 2532 OP_32_64(muls2): 2533 tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_IMUL, args[3]); 2534 break; 2535 OP_32_64(add2): 2536 if (const_args[4]) { 2537 tgen_arithi(s, ARITH_ADD + rexw, a0, args[4], 1); 2538 } else { 2539 tgen_arithr(s, ARITH_ADD + rexw, a0, args[4]); 2540 } 2541 if (const_args[5]) { 2542 tgen_arithi(s, ARITH_ADC + rexw, a1, args[5], 1); 2543 } else { 2544 tgen_arithr(s, ARITH_ADC + rexw, a1, args[5]); 2545 } 2546 break; 2547 OP_32_64(sub2): 2548 if (const_args[4]) { 2549 tgen_arithi(s, ARITH_SUB + rexw, a0, args[4], 1); 2550 } else { 2551 tgen_arithr(s, ARITH_SUB + rexw, a0, args[4]); 2552 } 2553 if (const_args[5]) { 2554 tgen_arithi(s, ARITH_SBB + rexw, a1, args[5], 1); 2555 } else { 2556 tgen_arithr(s, ARITH_SBB + rexw, a1, args[5]); 2557 } 2558 break; 2559 2560#if TCG_TARGET_REG_BITS == 32 2561 case INDEX_op_brcond2_i32: 2562 tcg_out_brcond2(s, args, const_args, 0); 2563 break; 2564 case INDEX_op_setcond2_i32: 2565 tcg_out_setcond2(s, args, const_args); 2566 break; 2567#else /* TCG_TARGET_REG_BITS == 64 */ 2568 case INDEX_op_ld32s_i64: 2569 tcg_out_modrm_offset(s, OPC_MOVSLQ, a0, a1, a2); 2570 break; 2571 case INDEX_op_ld_i64: 2572 tcg_out_ld(s, TCG_TYPE_I64, a0, a1, a2); 2573 break; 2574 case INDEX_op_st_i64: 2575 if (const_args[0]) { 2576 tcg_out_modrm_offset(s, OPC_MOVL_EvIz | P_REXW, 0, a1, a2); 2577 tcg_out32(s, a0); 2578 } else { 2579 tcg_out_st(s, TCG_TYPE_I64, a0, a1, a2); 2580 } 2581 break; 2582 2583 case INDEX_op_brcond_i64: 2584 tcg_out_brcond64(s, a2, a0, a1, const_args[1], arg_label(args[3]), 0); 2585 break; 2586 case INDEX_op_setcond_i64: 2587 tcg_out_setcond64(s, args[3], a0, a1, a2, const_a2); 2588 break; 2589 case INDEX_op_movcond_i64: 2590 tcg_out_movcond64(s, args[5], a0, a1, a2, const_a2, args[3]); 2591 break; 2592 2593 case INDEX_op_bswap64_i64: 2594 tcg_out_bswap64(s, a0); 2595 break; 2596 case INDEX_op_extu_i32_i64: 2597 case INDEX_op_ext32u_i64: 2598 case INDEX_op_extrl_i64_i32: 2599 tcg_out_ext32u(s, a0, a1); 2600 break; 2601 case INDEX_op_ext_i32_i64: 2602 case INDEX_op_ext32s_i64: 2603 tcg_out_ext32s(s, a0, a1); 2604 break; 2605 case INDEX_op_extrh_i64_i32: 2606 tcg_out_shifti(s, SHIFT_SHR + P_REXW, a0, 32); 2607 break; 2608#endif 2609 2610 OP_32_64(deposit): 2611 if (args[3] == 0 && args[4] == 8) { 2612 /* load bits 0..7 */ 2613 tcg_out_modrm(s, OPC_MOVB_EvGv | P_REXB_R | P_REXB_RM, a2, a0); 2614 } else if (args[3] == 8 && args[4] == 8) { 2615 /* load bits 8..15 */ 2616 tcg_out_modrm(s, OPC_MOVB_EvGv, a2, a0 + 4); 2617 } else if (args[3] == 0 && args[4] == 16) { 2618 /* load bits 0..15 */ 2619 tcg_out_modrm(s, OPC_MOVL_EvGv | P_DATA16, a2, a0); 2620 } else { 2621 tcg_abort(); 2622 } 2623 break; 2624 2625 case INDEX_op_extract_i64: 2626 if (a2 + args[3] == 32) { 2627 /* This is a 32-bit zero-extending right shift. */ 2628 tcg_out_mov(s, TCG_TYPE_I32, a0, a1); 2629 tcg_out_shifti(s, SHIFT_SHR, a0, a2); 2630 break; 2631 } 2632 /* FALLTHRU */ 2633 case INDEX_op_extract_i32: 2634 /* On the off-chance that we can use the high-byte registers. 2635 Otherwise we emit the same ext16 + shift pattern that we 2636 would have gotten from the normal tcg-op.c expansion. */ 2637 tcg_debug_assert(a2 == 8 && args[3] == 8); 2638 if (a1 < 4 && a0 < 8) { 2639 tcg_out_modrm(s, OPC_MOVZBL, a0, a1 + 4); 2640 } else { 2641 tcg_out_ext16u(s, a0, a1); 2642 tcg_out_shifti(s, SHIFT_SHR, a0, 8); 2643 } 2644 break; 2645 2646 case INDEX_op_sextract_i32: 2647 /* We don't implement sextract_i64, as we cannot sign-extend to 2648 64-bits without using the REX prefix that explicitly excludes 2649 access to the high-byte registers. */ 2650 tcg_debug_assert(a2 == 8 && args[3] == 8); 2651 if (a1 < 4 && a0 < 8) { 2652 tcg_out_modrm(s, OPC_MOVSBL, a0, a1 + 4); 2653 } else { 2654 tcg_out_ext16s(s, a0, a1, 0); 2655 tcg_out_shifti(s, SHIFT_SAR, a0, 8); 2656 } 2657 break; 2658 2659 OP_32_64(extract2): 2660 /* Note that SHRD outputs to the r/m operand. */ 2661 tcg_out_modrm(s, OPC_SHRD_Ib + rexw, a2, a0); 2662 tcg_out8(s, args[3]); 2663 break; 2664 2665 case INDEX_op_mb: 2666 tcg_out_mb(s, a0); 2667 break; 2668 case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ 2669 case INDEX_op_mov_i64: 2670 case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */ 2671 case INDEX_op_movi_i64: 2672 case INDEX_op_call: /* Always emitted via tcg_out_call. */ 2673 default: 2674 tcg_abort(); 2675 } 2676 2677#undef OP_32_64 2678} 2679 2680static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc, 2681 unsigned vecl, unsigned vece, 2682 const TCGArg *args, const int *const_args) 2683{ 2684 static int const add_insn[4] = { 2685 OPC_PADDB, OPC_PADDW, OPC_PADDD, OPC_PADDQ 2686 }; 2687 static int const ssadd_insn[4] = { 2688 OPC_PADDSB, OPC_PADDSW, OPC_UD2, OPC_UD2 2689 }; 2690 static int const usadd_insn[4] = { 2691 OPC_PADDUB, OPC_PADDUW, OPC_UD2, OPC_UD2 2692 }; 2693 static int const sub_insn[4] = { 2694 OPC_PSUBB, OPC_PSUBW, OPC_PSUBD, OPC_PSUBQ 2695 }; 2696 static int const sssub_insn[4] = { 2697 OPC_PSUBSB, OPC_PSUBSW, OPC_UD2, OPC_UD2 2698 }; 2699 static int const ussub_insn[4] = { 2700 OPC_PSUBUB, OPC_PSUBUW, OPC_UD2, OPC_UD2 2701 }; 2702 static int const mul_insn[4] = { 2703 OPC_UD2, OPC_PMULLW, OPC_PMULLD, OPC_UD2 2704 }; 2705 static int const shift_imm_insn[4] = { 2706 OPC_UD2, OPC_PSHIFTW_Ib, OPC_PSHIFTD_Ib, OPC_PSHIFTQ_Ib 2707 }; 2708 static int const cmpeq_insn[4] = { 2709 OPC_PCMPEQB, OPC_PCMPEQW, OPC_PCMPEQD, OPC_PCMPEQQ 2710 }; 2711 static int const cmpgt_insn[4] = { 2712 OPC_PCMPGTB, OPC_PCMPGTW, OPC_PCMPGTD, OPC_PCMPGTQ 2713 }; 2714 static int const punpckl_insn[4] = { 2715 OPC_PUNPCKLBW, OPC_PUNPCKLWD, OPC_PUNPCKLDQ, OPC_PUNPCKLQDQ 2716 }; 2717 static int const punpckh_insn[4] = { 2718 OPC_PUNPCKHBW, OPC_PUNPCKHWD, OPC_PUNPCKHDQ, OPC_PUNPCKHQDQ 2719 }; 2720 static int const packss_insn[4] = { 2721 OPC_PACKSSWB, OPC_PACKSSDW, OPC_UD2, OPC_UD2 2722 }; 2723 static int const packus_insn[4] = { 2724 OPC_PACKUSWB, OPC_PACKUSDW, OPC_UD2, OPC_UD2 2725 }; 2726 static int const smin_insn[4] = { 2727 OPC_PMINSB, OPC_PMINSW, OPC_PMINSD, OPC_UD2 2728 }; 2729 static int const smax_insn[4] = { 2730 OPC_PMAXSB, OPC_PMAXSW, OPC_PMAXSD, OPC_UD2 2731 }; 2732 static int const umin_insn[4] = { 2733 OPC_PMINUB, OPC_PMINUW, OPC_PMINUD, OPC_UD2 2734 }; 2735 static int const umax_insn[4] = { 2736 OPC_PMAXUB, OPC_PMAXUW, OPC_PMAXUD, OPC_UD2 2737 }; 2738 static int const shlv_insn[4] = { 2739 /* TODO: AVX512 adds support for MO_16. */ 2740 OPC_UD2, OPC_UD2, OPC_VPSLLVD, OPC_VPSLLVQ 2741 }; 2742 static int const shrv_insn[4] = { 2743 /* TODO: AVX512 adds support for MO_16. */ 2744 OPC_UD2, OPC_UD2, OPC_VPSRLVD, OPC_VPSRLVQ 2745 }; 2746 static int const sarv_insn[4] = { 2747 /* TODO: AVX512 adds support for MO_16, MO_64. */ 2748 OPC_UD2, OPC_UD2, OPC_VPSRAVD, OPC_UD2 2749 }; 2750 static int const shls_insn[4] = { 2751 OPC_UD2, OPC_PSLLW, OPC_PSLLD, OPC_PSLLQ 2752 }; 2753 static int const shrs_insn[4] = { 2754 OPC_UD2, OPC_PSRLW, OPC_PSRLD, OPC_PSRLQ 2755 }; 2756 static int const sars_insn[4] = { 2757 OPC_UD2, OPC_PSRAW, OPC_PSRAD, OPC_UD2 2758 }; 2759 static int const abs_insn[4] = { 2760 /* TODO: AVX512 adds support for MO_64. */ 2761 OPC_PABSB, OPC_PABSW, OPC_PABSD, OPC_UD2 2762 }; 2763 2764 TCGType type = vecl + TCG_TYPE_V64; 2765 int insn, sub; 2766 TCGArg a0, a1, a2; 2767 2768 a0 = args[0]; 2769 a1 = args[1]; 2770 a2 = args[2]; 2771 2772 switch (opc) { 2773 case INDEX_op_add_vec: 2774 insn = add_insn[vece]; 2775 goto gen_simd; 2776 case INDEX_op_ssadd_vec: 2777 insn = ssadd_insn[vece]; 2778 goto gen_simd; 2779 case INDEX_op_usadd_vec: 2780 insn = usadd_insn[vece]; 2781 goto gen_simd; 2782 case INDEX_op_sub_vec: 2783 insn = sub_insn[vece]; 2784 goto gen_simd; 2785 case INDEX_op_sssub_vec: 2786 insn = sssub_insn[vece]; 2787 goto gen_simd; 2788 case INDEX_op_ussub_vec: 2789 insn = ussub_insn[vece]; 2790 goto gen_simd; 2791 case INDEX_op_mul_vec: 2792 insn = mul_insn[vece]; 2793 goto gen_simd; 2794 case INDEX_op_and_vec: 2795 insn = OPC_PAND; 2796 goto gen_simd; 2797 case INDEX_op_or_vec: 2798 insn = OPC_POR; 2799 goto gen_simd; 2800 case INDEX_op_xor_vec: 2801 insn = OPC_PXOR; 2802 goto gen_simd; 2803 case INDEX_op_smin_vec: 2804 insn = smin_insn[vece]; 2805 goto gen_simd; 2806 case INDEX_op_umin_vec: 2807 insn = umin_insn[vece]; 2808 goto gen_simd; 2809 case INDEX_op_smax_vec: 2810 insn = smax_insn[vece]; 2811 goto gen_simd; 2812 case INDEX_op_umax_vec: 2813 insn = umax_insn[vece]; 2814 goto gen_simd; 2815 case INDEX_op_shlv_vec: 2816 insn = shlv_insn[vece]; 2817 goto gen_simd; 2818 case INDEX_op_shrv_vec: 2819 insn = shrv_insn[vece]; 2820 goto gen_simd; 2821 case INDEX_op_sarv_vec: 2822 insn = sarv_insn[vece]; 2823 goto gen_simd; 2824 case INDEX_op_shls_vec: 2825 insn = shls_insn[vece]; 2826 goto gen_simd; 2827 case INDEX_op_shrs_vec: 2828 insn = shrs_insn[vece]; 2829 goto gen_simd; 2830 case INDEX_op_sars_vec: 2831 insn = sars_insn[vece]; 2832 goto gen_simd; 2833 case INDEX_op_x86_punpckl_vec: 2834 insn = punpckl_insn[vece]; 2835 goto gen_simd; 2836 case INDEX_op_x86_punpckh_vec: 2837 insn = punpckh_insn[vece]; 2838 goto gen_simd; 2839 case INDEX_op_x86_packss_vec: 2840 insn = packss_insn[vece]; 2841 goto gen_simd; 2842 case INDEX_op_x86_packus_vec: 2843 insn = packus_insn[vece]; 2844 goto gen_simd; 2845#if TCG_TARGET_REG_BITS == 32 2846 case INDEX_op_dup2_vec: 2847 /* First merge the two 32-bit inputs to a single 64-bit element. */ 2848 tcg_out_vex_modrm(s, OPC_PUNPCKLDQ, a0, a1, a2); 2849 /* Then replicate the 64-bit elements across the rest of the vector. */ 2850 if (type != TCG_TYPE_V64) { 2851 tcg_out_dup_vec(s, type, MO_64, a0, a0); 2852 } 2853 break; 2854#endif 2855 case INDEX_op_abs_vec: 2856 insn = abs_insn[vece]; 2857 a2 = a1; 2858 a1 = 0; 2859 goto gen_simd; 2860 gen_simd: 2861 tcg_debug_assert(insn != OPC_UD2); 2862 if (type == TCG_TYPE_V256) { 2863 insn |= P_VEXL; 2864 } 2865 tcg_out_vex_modrm(s, insn, a0, a1, a2); 2866 break; 2867 2868 case INDEX_op_cmp_vec: 2869 sub = args[3]; 2870 if (sub == TCG_COND_EQ) { 2871 insn = cmpeq_insn[vece]; 2872 } else if (sub == TCG_COND_GT) { 2873 insn = cmpgt_insn[vece]; 2874 } else { 2875 g_assert_not_reached(); 2876 } 2877 goto gen_simd; 2878 2879 case INDEX_op_andc_vec: 2880 insn = OPC_PANDN; 2881 if (type == TCG_TYPE_V256) { 2882 insn |= P_VEXL; 2883 } 2884 tcg_out_vex_modrm(s, insn, a0, a2, a1); 2885 break; 2886 2887 case INDEX_op_shli_vec: 2888 sub = 6; 2889 goto gen_shift; 2890 case INDEX_op_shri_vec: 2891 sub = 2; 2892 goto gen_shift; 2893 case INDEX_op_sari_vec: 2894 tcg_debug_assert(vece != MO_64); 2895 sub = 4; 2896 gen_shift: 2897 tcg_debug_assert(vece != MO_8); 2898 insn = shift_imm_insn[vece]; 2899 if (type == TCG_TYPE_V256) { 2900 insn |= P_VEXL; 2901 } 2902 tcg_out_vex_modrm(s, insn, sub, a0, a1); 2903 tcg_out8(s, a2); 2904 break; 2905 2906 case INDEX_op_ld_vec: 2907 tcg_out_ld(s, type, a0, a1, a2); 2908 break; 2909 case INDEX_op_st_vec: 2910 tcg_out_st(s, type, a0, a1, a2); 2911 break; 2912 case INDEX_op_dupm_vec: 2913 tcg_out_dupm_vec(s, type, vece, a0, a1, a2); 2914 break; 2915 2916 case INDEX_op_x86_shufps_vec: 2917 insn = OPC_SHUFPS; 2918 sub = args[3]; 2919 goto gen_simd_imm8; 2920 case INDEX_op_x86_blend_vec: 2921 if (vece == MO_16) { 2922 insn = OPC_PBLENDW; 2923 } else if (vece == MO_32) { 2924 insn = (have_avx2 ? OPC_VPBLENDD : OPC_BLENDPS); 2925 } else { 2926 g_assert_not_reached(); 2927 } 2928 sub = args[3]; 2929 goto gen_simd_imm8; 2930 case INDEX_op_x86_vperm2i128_vec: 2931 insn = OPC_VPERM2I128; 2932 sub = args[3]; 2933 goto gen_simd_imm8; 2934 gen_simd_imm8: 2935 if (type == TCG_TYPE_V256) { 2936 insn |= P_VEXL; 2937 } 2938 tcg_out_vex_modrm(s, insn, a0, a1, a2); 2939 tcg_out8(s, sub); 2940 break; 2941 2942 case INDEX_op_x86_vpblendvb_vec: 2943 insn = OPC_VPBLENDVB; 2944 if (type == TCG_TYPE_V256) { 2945 insn |= P_VEXL; 2946 } 2947 tcg_out_vex_modrm(s, insn, a0, a1, a2); 2948 tcg_out8(s, args[3] << 4); 2949 break; 2950 2951 case INDEX_op_x86_psrldq_vec: 2952 tcg_out_vex_modrm(s, OPC_GRP14, 3, a0, a1); 2953 tcg_out8(s, a2); 2954 break; 2955 2956 case INDEX_op_mov_vec: /* Always emitted via tcg_out_mov. */ 2957 case INDEX_op_dupi_vec: /* Always emitted via tcg_out_movi. */ 2958 case INDEX_op_dup_vec: /* Always emitted via tcg_out_dup_vec. */ 2959 default: 2960 g_assert_not_reached(); 2961 } 2962} 2963 2964static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op) 2965{ 2966 static const TCGTargetOpDef r = { .args_ct_str = { "r" } }; 2967 static const TCGTargetOpDef ri_r = { .args_ct_str = { "ri", "r" } }; 2968 static const TCGTargetOpDef re_r = { .args_ct_str = { "re", "r" } }; 2969 static const TCGTargetOpDef qi_r = { .args_ct_str = { "qi", "r" } }; 2970 static const TCGTargetOpDef r_r = { .args_ct_str = { "r", "r" } }; 2971 static const TCGTargetOpDef r_q = { .args_ct_str = { "r", "q" } }; 2972 static const TCGTargetOpDef r_re = { .args_ct_str = { "r", "re" } }; 2973 static const TCGTargetOpDef r_0 = { .args_ct_str = { "r", "0" } }; 2974 static const TCGTargetOpDef r_r_ri = { .args_ct_str = { "r", "r", "ri" } }; 2975 static const TCGTargetOpDef r_r_re = { .args_ct_str = { "r", "r", "re" } }; 2976 static const TCGTargetOpDef r_0_r = { .args_ct_str = { "r", "0", "r" } }; 2977 static const TCGTargetOpDef r_0_re = { .args_ct_str = { "r", "0", "re" } }; 2978 static const TCGTargetOpDef r_0_ci = { .args_ct_str = { "r", "0", "ci" } }; 2979 static const TCGTargetOpDef r_L = { .args_ct_str = { "r", "L" } }; 2980 static const TCGTargetOpDef L_L = { .args_ct_str = { "L", "L" } }; 2981 static const TCGTargetOpDef r_L_L = { .args_ct_str = { "r", "L", "L" } }; 2982 static const TCGTargetOpDef r_r_L = { .args_ct_str = { "r", "r", "L" } }; 2983 static const TCGTargetOpDef L_L_L = { .args_ct_str = { "L", "L", "L" } }; 2984 static const TCGTargetOpDef r_r_L_L 2985 = { .args_ct_str = { "r", "r", "L", "L" } }; 2986 static const TCGTargetOpDef L_L_L_L 2987 = { .args_ct_str = { "L", "L", "L", "L" } }; 2988 static const TCGTargetOpDef x_x = { .args_ct_str = { "x", "x" } }; 2989 static const TCGTargetOpDef x_x_x = { .args_ct_str = { "x", "x", "x" } }; 2990 static const TCGTargetOpDef x_x_x_x 2991 = { .args_ct_str = { "x", "x", "x", "x" } }; 2992 static const TCGTargetOpDef x_r = { .args_ct_str = { "x", "r" } }; 2993 2994 switch (op) { 2995 case INDEX_op_goto_ptr: 2996 return &r; 2997 2998 case INDEX_op_ld8u_i32: 2999 case INDEX_op_ld8u_i64: 3000 case INDEX_op_ld8s_i32: 3001 case INDEX_op_ld8s_i64: 3002 case INDEX_op_ld16u_i32: 3003 case INDEX_op_ld16u_i64: 3004 case INDEX_op_ld16s_i32: 3005 case INDEX_op_ld16s_i64: 3006 case INDEX_op_ld_i32: 3007 case INDEX_op_ld32u_i64: 3008 case INDEX_op_ld32s_i64: 3009 case INDEX_op_ld_i64: 3010 return &r_r; 3011 3012 case INDEX_op_st8_i32: 3013 case INDEX_op_st8_i64: 3014 return &qi_r; 3015 case INDEX_op_st16_i32: 3016 case INDEX_op_st16_i64: 3017 case INDEX_op_st_i32: 3018 case INDEX_op_st32_i64: 3019 return &ri_r; 3020 case INDEX_op_st_i64: 3021 return &re_r; 3022 3023 case INDEX_op_add_i32: 3024 case INDEX_op_add_i64: 3025 return &r_r_re; 3026 case INDEX_op_sub_i32: 3027 case INDEX_op_sub_i64: 3028 case INDEX_op_mul_i32: 3029 case INDEX_op_mul_i64: 3030 case INDEX_op_or_i32: 3031 case INDEX_op_or_i64: 3032 case INDEX_op_xor_i32: 3033 case INDEX_op_xor_i64: 3034 return &r_0_re; 3035 3036 case INDEX_op_and_i32: 3037 case INDEX_op_and_i64: 3038 { 3039 static const TCGTargetOpDef and 3040 = { .args_ct_str = { "r", "0", "reZ" } }; 3041 return ∧ 3042 } 3043 break; 3044 case INDEX_op_andc_i32: 3045 case INDEX_op_andc_i64: 3046 { 3047 static const TCGTargetOpDef andc 3048 = { .args_ct_str = { "r", "r", "rI" } }; 3049 return &andc; 3050 } 3051 break; 3052 3053 case INDEX_op_shl_i32: 3054 case INDEX_op_shl_i64: 3055 case INDEX_op_shr_i32: 3056 case INDEX_op_shr_i64: 3057 case INDEX_op_sar_i32: 3058 case INDEX_op_sar_i64: 3059 return have_bmi2 ? &r_r_ri : &r_0_ci; 3060 case INDEX_op_rotl_i32: 3061 case INDEX_op_rotl_i64: 3062 case INDEX_op_rotr_i32: 3063 case INDEX_op_rotr_i64: 3064 return &r_0_ci; 3065 3066 case INDEX_op_brcond_i32: 3067 case INDEX_op_brcond_i64: 3068 return &r_re; 3069 3070 case INDEX_op_bswap16_i32: 3071 case INDEX_op_bswap16_i64: 3072 case INDEX_op_bswap32_i32: 3073 case INDEX_op_bswap32_i64: 3074 case INDEX_op_bswap64_i64: 3075 case INDEX_op_neg_i32: 3076 case INDEX_op_neg_i64: 3077 case INDEX_op_not_i32: 3078 case INDEX_op_not_i64: 3079 case INDEX_op_extrh_i64_i32: 3080 return &r_0; 3081 3082 case INDEX_op_ext8s_i32: 3083 case INDEX_op_ext8s_i64: 3084 case INDEX_op_ext8u_i32: 3085 case INDEX_op_ext8u_i64: 3086 return &r_q; 3087 case INDEX_op_ext16s_i32: 3088 case INDEX_op_ext16s_i64: 3089 case INDEX_op_ext16u_i32: 3090 case INDEX_op_ext16u_i64: 3091 case INDEX_op_ext32s_i64: 3092 case INDEX_op_ext32u_i64: 3093 case INDEX_op_ext_i32_i64: 3094 case INDEX_op_extu_i32_i64: 3095 case INDEX_op_extrl_i64_i32: 3096 case INDEX_op_extract_i32: 3097 case INDEX_op_extract_i64: 3098 case INDEX_op_sextract_i32: 3099 case INDEX_op_ctpop_i32: 3100 case INDEX_op_ctpop_i64: 3101 return &r_r; 3102 case INDEX_op_extract2_i32: 3103 case INDEX_op_extract2_i64: 3104 return &r_0_r; 3105 3106 case INDEX_op_deposit_i32: 3107 case INDEX_op_deposit_i64: 3108 { 3109 static const TCGTargetOpDef dep 3110 = { .args_ct_str = { "Q", "0", "Q" } }; 3111 return &dep; 3112 } 3113 case INDEX_op_setcond_i32: 3114 case INDEX_op_setcond_i64: 3115 { 3116 static const TCGTargetOpDef setc 3117 = { .args_ct_str = { "q", "r", "re" } }; 3118 return &setc; 3119 } 3120 case INDEX_op_movcond_i32: 3121 case INDEX_op_movcond_i64: 3122 { 3123 static const TCGTargetOpDef movc 3124 = { .args_ct_str = { "r", "r", "re", "r", "0" } }; 3125 return &movc; 3126 } 3127 case INDEX_op_div2_i32: 3128 case INDEX_op_div2_i64: 3129 case INDEX_op_divu2_i32: 3130 case INDEX_op_divu2_i64: 3131 { 3132 static const TCGTargetOpDef div2 3133 = { .args_ct_str = { "a", "d", "0", "1", "r" } }; 3134 return &div2; 3135 } 3136 case INDEX_op_mulu2_i32: 3137 case INDEX_op_mulu2_i64: 3138 case INDEX_op_muls2_i32: 3139 case INDEX_op_muls2_i64: 3140 { 3141 static const TCGTargetOpDef mul2 3142 = { .args_ct_str = { "a", "d", "a", "r" } }; 3143 return &mul2; 3144 } 3145 case INDEX_op_add2_i32: 3146 case INDEX_op_add2_i64: 3147 case INDEX_op_sub2_i32: 3148 case INDEX_op_sub2_i64: 3149 { 3150 static const TCGTargetOpDef arith2 3151 = { .args_ct_str = { "r", "r", "0", "1", "re", "re" } }; 3152 return &arith2; 3153 } 3154 case INDEX_op_ctz_i32: 3155 case INDEX_op_ctz_i64: 3156 { 3157 static const TCGTargetOpDef ctz[2] = { 3158 { .args_ct_str = { "&r", "r", "r" } }, 3159 { .args_ct_str = { "&r", "r", "rW" } }, 3160 }; 3161 return &ctz[have_bmi1]; 3162 } 3163 case INDEX_op_clz_i32: 3164 case INDEX_op_clz_i64: 3165 { 3166 static const TCGTargetOpDef clz[2] = { 3167 { .args_ct_str = { "&r", "r", "r" } }, 3168 { .args_ct_str = { "&r", "r", "rW" } }, 3169 }; 3170 return &clz[have_lzcnt]; 3171 } 3172 3173 case INDEX_op_qemu_ld_i32: 3174 return TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &r_L : &r_L_L; 3175 case INDEX_op_qemu_st_i32: 3176 return TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &L_L : &L_L_L; 3177 case INDEX_op_qemu_ld_i64: 3178 return (TCG_TARGET_REG_BITS == 64 ? &r_L 3179 : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &r_r_L 3180 : &r_r_L_L); 3181 case INDEX_op_qemu_st_i64: 3182 return (TCG_TARGET_REG_BITS == 64 ? &L_L 3183 : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &L_L_L 3184 : &L_L_L_L); 3185 3186 case INDEX_op_brcond2_i32: 3187 { 3188 static const TCGTargetOpDef b2 3189 = { .args_ct_str = { "r", "r", "ri", "ri" } }; 3190 return &b2; 3191 } 3192 case INDEX_op_setcond2_i32: 3193 { 3194 static const TCGTargetOpDef s2 3195 = { .args_ct_str = { "r", "r", "r", "ri", "ri" } }; 3196 return &s2; 3197 } 3198 3199 case INDEX_op_ld_vec: 3200 case INDEX_op_st_vec: 3201 case INDEX_op_dupm_vec: 3202 return &x_r; 3203 3204 case INDEX_op_add_vec: 3205 case INDEX_op_sub_vec: 3206 case INDEX_op_mul_vec: 3207 case INDEX_op_and_vec: 3208 case INDEX_op_or_vec: 3209 case INDEX_op_xor_vec: 3210 case INDEX_op_andc_vec: 3211 case INDEX_op_ssadd_vec: 3212 case INDEX_op_usadd_vec: 3213 case INDEX_op_sssub_vec: 3214 case INDEX_op_ussub_vec: 3215 case INDEX_op_smin_vec: 3216 case INDEX_op_umin_vec: 3217 case INDEX_op_smax_vec: 3218 case INDEX_op_umax_vec: 3219 case INDEX_op_shlv_vec: 3220 case INDEX_op_shrv_vec: 3221 case INDEX_op_sarv_vec: 3222 case INDEX_op_shls_vec: 3223 case INDEX_op_shrs_vec: 3224 case INDEX_op_sars_vec: 3225 case INDEX_op_rotls_vec: 3226 case INDEX_op_cmp_vec: 3227 case INDEX_op_x86_shufps_vec: 3228 case INDEX_op_x86_blend_vec: 3229 case INDEX_op_x86_packss_vec: 3230 case INDEX_op_x86_packus_vec: 3231 case INDEX_op_x86_vperm2i128_vec: 3232 case INDEX_op_x86_punpckl_vec: 3233 case INDEX_op_x86_punpckh_vec: 3234#if TCG_TARGET_REG_BITS == 32 3235 case INDEX_op_dup2_vec: 3236#endif 3237 return &x_x_x; 3238 case INDEX_op_abs_vec: 3239 case INDEX_op_dup_vec: 3240 case INDEX_op_shli_vec: 3241 case INDEX_op_shri_vec: 3242 case INDEX_op_sari_vec: 3243 case INDEX_op_x86_psrldq_vec: 3244 return &x_x; 3245 case INDEX_op_x86_vpblendvb_vec: 3246 return &x_x_x_x; 3247 3248 default: 3249 break; 3250 } 3251 return NULL; 3252} 3253 3254int tcg_can_emit_vec_op(TCGOpcode opc, TCGType type, unsigned vece) 3255{ 3256 switch (opc) { 3257 case INDEX_op_add_vec: 3258 case INDEX_op_sub_vec: 3259 case INDEX_op_and_vec: 3260 case INDEX_op_or_vec: 3261 case INDEX_op_xor_vec: 3262 case INDEX_op_andc_vec: 3263 return 1; 3264 case INDEX_op_rotli_vec: 3265 case INDEX_op_cmp_vec: 3266 case INDEX_op_cmpsel_vec: 3267 return -1; 3268 3269 case INDEX_op_shli_vec: 3270 case INDEX_op_shri_vec: 3271 /* We must expand the operation for MO_8. */ 3272 return vece == MO_8 ? -1 : 1; 3273 3274 case INDEX_op_sari_vec: 3275 /* We must expand the operation for MO_8. */ 3276 if (vece == MO_8) { 3277 return -1; 3278 } 3279 /* We can emulate this for MO_64, but it does not pay off 3280 unless we're producing at least 4 values. */ 3281 if (vece == MO_64) { 3282 return type >= TCG_TYPE_V256 ? -1 : 0; 3283 } 3284 return 1; 3285 3286 case INDEX_op_shls_vec: 3287 case INDEX_op_shrs_vec: 3288 return vece >= MO_16; 3289 case INDEX_op_sars_vec: 3290 return vece >= MO_16 && vece <= MO_32; 3291 case INDEX_op_rotls_vec: 3292 return vece >= MO_16 ? -1 : 0; 3293 3294 case INDEX_op_shlv_vec: 3295 case INDEX_op_shrv_vec: 3296 return have_avx2 && vece >= MO_32; 3297 case INDEX_op_sarv_vec: 3298 return have_avx2 && vece == MO_32; 3299 case INDEX_op_rotlv_vec: 3300 case INDEX_op_rotrv_vec: 3301 return have_avx2 && vece >= MO_32 ? -1 : 0; 3302 3303 case INDEX_op_mul_vec: 3304 if (vece == MO_8) { 3305 /* We can expand the operation for MO_8. */ 3306 return -1; 3307 } 3308 if (vece == MO_64) { 3309 return 0; 3310 } 3311 return 1; 3312 3313 case INDEX_op_ssadd_vec: 3314 case INDEX_op_usadd_vec: 3315 case INDEX_op_sssub_vec: 3316 case INDEX_op_ussub_vec: 3317 return vece <= MO_16; 3318 case INDEX_op_smin_vec: 3319 case INDEX_op_smax_vec: 3320 case INDEX_op_umin_vec: 3321 case INDEX_op_umax_vec: 3322 case INDEX_op_abs_vec: 3323 return vece <= MO_32; 3324 3325 default: 3326 return 0; 3327 } 3328} 3329 3330static void expand_vec_shi(TCGType type, unsigned vece, TCGOpcode opc, 3331 TCGv_vec v0, TCGv_vec v1, TCGArg imm) 3332{ 3333 TCGv_vec t1, t2; 3334 3335 tcg_debug_assert(vece == MO_8); 3336 3337 t1 = tcg_temp_new_vec(type); 3338 t2 = tcg_temp_new_vec(type); 3339 3340 /* 3341 * Unpack to W, shift, and repack. Tricky bits: 3342 * (1) Use punpck*bw x,x to produce DDCCBBAA, 3343 * i.e. duplicate in other half of the 16-bit lane. 3344 * (2) For right-shift, add 8 so that the high half of the lane 3345 * becomes zero. For left-shift, and left-rotate, we must 3346 * shift up and down again. 3347 * (3) Step 2 leaves high half zero such that PACKUSWB 3348 * (pack with unsigned saturation) does not modify 3349 * the quantity. 3350 */ 3351 vec_gen_3(INDEX_op_x86_punpckl_vec, type, MO_8, 3352 tcgv_vec_arg(t1), tcgv_vec_arg(v1), tcgv_vec_arg(v1)); 3353 vec_gen_3(INDEX_op_x86_punpckh_vec, type, MO_8, 3354 tcgv_vec_arg(t2), tcgv_vec_arg(v1), tcgv_vec_arg(v1)); 3355 3356 if (opc != INDEX_op_rotli_vec) { 3357 imm += 8; 3358 } 3359 if (opc == INDEX_op_shri_vec) { 3360 tcg_gen_shri_vec(MO_16, t1, t1, imm); 3361 tcg_gen_shri_vec(MO_16, t2, t2, imm); 3362 } else { 3363 tcg_gen_shli_vec(MO_16, t1, t1, imm); 3364 tcg_gen_shli_vec(MO_16, t2, t2, imm); 3365 tcg_gen_shri_vec(MO_16, t1, t1, 8); 3366 tcg_gen_shri_vec(MO_16, t2, t2, 8); 3367 } 3368 3369 vec_gen_3(INDEX_op_x86_packus_vec, type, MO_8, 3370 tcgv_vec_arg(v0), tcgv_vec_arg(t1), tcgv_vec_arg(t2)); 3371 tcg_temp_free_vec(t1); 3372 tcg_temp_free_vec(t2); 3373} 3374 3375static void expand_vec_sari(TCGType type, unsigned vece, 3376 TCGv_vec v0, TCGv_vec v1, TCGArg imm) 3377{ 3378 TCGv_vec t1, t2; 3379 3380 switch (vece) { 3381 case MO_8: 3382 /* Unpack to W, shift, and repack, as in expand_vec_shi. */ 3383 t1 = tcg_temp_new_vec(type); 3384 t2 = tcg_temp_new_vec(type); 3385 vec_gen_3(INDEX_op_x86_punpckl_vec, type, MO_8, 3386 tcgv_vec_arg(t1), tcgv_vec_arg(v1), tcgv_vec_arg(v1)); 3387 vec_gen_3(INDEX_op_x86_punpckh_vec, type, MO_8, 3388 tcgv_vec_arg(t2), tcgv_vec_arg(v1), tcgv_vec_arg(v1)); 3389 tcg_gen_sari_vec(MO_16, t1, t1, imm + 8); 3390 tcg_gen_sari_vec(MO_16, t2, t2, imm + 8); 3391 vec_gen_3(INDEX_op_x86_packss_vec, type, MO_8, 3392 tcgv_vec_arg(v0), tcgv_vec_arg(t1), tcgv_vec_arg(t2)); 3393 tcg_temp_free_vec(t1); 3394 tcg_temp_free_vec(t2); 3395 break; 3396 3397 case MO_64: 3398 if (imm <= 32) { 3399 /* 3400 * We can emulate a small sign extend by performing an arithmetic 3401 * 32-bit shift and overwriting the high half of a 64-bit logical 3402 * shift. Note that the ISA says shift of 32 is valid, but TCG 3403 * does not, so we have to bound the smaller shift -- we get the 3404 * same result in the high half either way. 3405 */ 3406 t1 = tcg_temp_new_vec(type); 3407 tcg_gen_sari_vec(MO_32, t1, v1, MIN(imm, 31)); 3408 tcg_gen_shri_vec(MO_64, v0, v1, imm); 3409 vec_gen_4(INDEX_op_x86_blend_vec, type, MO_32, 3410 tcgv_vec_arg(v0), tcgv_vec_arg(v0), 3411 tcgv_vec_arg(t1), 0xaa); 3412 tcg_temp_free_vec(t1); 3413 } else { 3414 /* Otherwise we will need to use a compare vs 0 to produce 3415 * the sign-extend, shift and merge. 3416 */ 3417 t1 = tcg_const_zeros_vec(type); 3418 tcg_gen_cmp_vec(TCG_COND_GT, MO_64, t1, t1, v1); 3419 tcg_gen_shri_vec(MO_64, v0, v1, imm); 3420 tcg_gen_shli_vec(MO_64, t1, t1, 64 - imm); 3421 tcg_gen_or_vec(MO_64, v0, v0, t1); 3422 tcg_temp_free_vec(t1); 3423 } 3424 break; 3425 3426 default: 3427 g_assert_not_reached(); 3428 } 3429} 3430 3431static void expand_vec_rotli(TCGType type, unsigned vece, 3432 TCGv_vec v0, TCGv_vec v1, TCGArg imm) 3433{ 3434 TCGv_vec t; 3435 3436 if (vece == MO_8) { 3437 expand_vec_shi(type, vece, INDEX_op_rotli_vec, v0, v1, imm); 3438 return; 3439 } 3440 3441 t = tcg_temp_new_vec(type); 3442 tcg_gen_shli_vec(vece, t, v1, imm); 3443 tcg_gen_shri_vec(vece, v0, v1, (8 << vece) - imm); 3444 tcg_gen_or_vec(vece, v0, v0, t); 3445 tcg_temp_free_vec(t); 3446} 3447 3448static void expand_vec_rotls(TCGType type, unsigned vece, 3449 TCGv_vec v0, TCGv_vec v1, TCGv_i32 lsh) 3450{ 3451 TCGv_i32 rsh; 3452 TCGv_vec t; 3453 3454 tcg_debug_assert(vece != MO_8); 3455 3456 t = tcg_temp_new_vec(type); 3457 rsh = tcg_temp_new_i32(); 3458 3459 tcg_gen_neg_i32(rsh, lsh); 3460 tcg_gen_andi_i32(rsh, rsh, (8 << vece) - 1); 3461 tcg_gen_shls_vec(vece, t, v1, lsh); 3462 tcg_gen_shrs_vec(vece, v0, v1, rsh); 3463 tcg_gen_or_vec(vece, v0, v0, t); 3464 tcg_temp_free_vec(t); 3465 tcg_temp_free_i32(rsh); 3466} 3467 3468static void expand_vec_rotv(TCGType type, unsigned vece, TCGv_vec v0, 3469 TCGv_vec v1, TCGv_vec sh, bool right) 3470{ 3471 TCGv_vec t = tcg_temp_new_vec(type); 3472 3473 tcg_gen_dupi_vec(vece, t, 8 << vece); 3474 tcg_gen_sub_vec(vece, t, t, sh); 3475 if (right) { 3476 tcg_gen_shlv_vec(vece, t, v1, t); 3477 tcg_gen_shrv_vec(vece, v0, v1, sh); 3478 } else { 3479 tcg_gen_shrv_vec(vece, t, v1, t); 3480 tcg_gen_shlv_vec(vece, v0, v1, sh); 3481 } 3482 tcg_gen_or_vec(vece, v0, v0, t); 3483 tcg_temp_free_vec(t); 3484} 3485 3486static void expand_vec_mul(TCGType type, unsigned vece, 3487 TCGv_vec v0, TCGv_vec v1, TCGv_vec v2) 3488{ 3489 TCGv_vec t1, t2, t3, t4; 3490 3491 tcg_debug_assert(vece == MO_8); 3492 3493 /* 3494 * Unpack v1 bytes to words, 0 | x. 3495 * Unpack v2 bytes to words, y | 0. 3496 * This leaves the 8-bit result, x * y, with 8 bits of right padding. 3497 * Shift logical right by 8 bits to clear the high 8 bytes before 3498 * using an unsigned saturated pack. 3499 * 3500 * The difference between the V64, V128 and V256 cases is merely how 3501 * we distribute the expansion between temporaries. 3502 */ 3503 switch (type) { 3504 case TCG_TYPE_V64: 3505 t1 = tcg_temp_new_vec(TCG_TYPE_V128); 3506 t2 = tcg_temp_new_vec(TCG_TYPE_V128); 3507 tcg_gen_dup16i_vec(t2, 0); 3508 vec_gen_3(INDEX_op_x86_punpckl_vec, TCG_TYPE_V128, MO_8, 3509 tcgv_vec_arg(t1), tcgv_vec_arg(v1), tcgv_vec_arg(t2)); 3510 vec_gen_3(INDEX_op_x86_punpckl_vec, TCG_TYPE_V128, MO_8, 3511 tcgv_vec_arg(t2), tcgv_vec_arg(t2), tcgv_vec_arg(v2)); 3512 tcg_gen_mul_vec(MO_16, t1, t1, t2); 3513 tcg_gen_shri_vec(MO_16, t1, t1, 8); 3514 vec_gen_3(INDEX_op_x86_packus_vec, TCG_TYPE_V128, MO_8, 3515 tcgv_vec_arg(v0), tcgv_vec_arg(t1), tcgv_vec_arg(t1)); 3516 tcg_temp_free_vec(t1); 3517 tcg_temp_free_vec(t2); 3518 break; 3519 3520 case TCG_TYPE_V128: 3521 case TCG_TYPE_V256: 3522 t1 = tcg_temp_new_vec(type); 3523 t2 = tcg_temp_new_vec(type); 3524 t3 = tcg_temp_new_vec(type); 3525 t4 = tcg_temp_new_vec(type); 3526 tcg_gen_dup16i_vec(t4, 0); 3527 vec_gen_3(INDEX_op_x86_punpckl_vec, type, MO_8, 3528 tcgv_vec_arg(t1), tcgv_vec_arg(v1), tcgv_vec_arg(t4)); 3529 vec_gen_3(INDEX_op_x86_punpckl_vec, type, MO_8, 3530 tcgv_vec_arg(t2), tcgv_vec_arg(t4), tcgv_vec_arg(v2)); 3531 vec_gen_3(INDEX_op_x86_punpckh_vec, type, MO_8, 3532 tcgv_vec_arg(t3), tcgv_vec_arg(v1), tcgv_vec_arg(t4)); 3533 vec_gen_3(INDEX_op_x86_punpckh_vec, type, MO_8, 3534 tcgv_vec_arg(t4), tcgv_vec_arg(t4), tcgv_vec_arg(v2)); 3535 tcg_gen_mul_vec(MO_16, t1, t1, t2); 3536 tcg_gen_mul_vec(MO_16, t3, t3, t4); 3537 tcg_gen_shri_vec(MO_16, t1, t1, 8); 3538 tcg_gen_shri_vec(MO_16, t3, t3, 8); 3539 vec_gen_3(INDEX_op_x86_packus_vec, type, MO_8, 3540 tcgv_vec_arg(v0), tcgv_vec_arg(t1), tcgv_vec_arg(t3)); 3541 tcg_temp_free_vec(t1); 3542 tcg_temp_free_vec(t2); 3543 tcg_temp_free_vec(t3); 3544 tcg_temp_free_vec(t4); 3545 break; 3546 3547 default: 3548 g_assert_not_reached(); 3549 } 3550} 3551 3552static bool expand_vec_cmp_noinv(TCGType type, unsigned vece, TCGv_vec v0, 3553 TCGv_vec v1, TCGv_vec v2, TCGCond cond) 3554{ 3555 enum { 3556 NEED_INV = 1, 3557 NEED_SWAP = 2, 3558 NEED_BIAS = 4, 3559 NEED_UMIN = 8, 3560 NEED_UMAX = 16, 3561 }; 3562 TCGv_vec t1, t2; 3563 uint8_t fixup; 3564 3565 switch (cond) { 3566 case TCG_COND_EQ: 3567 case TCG_COND_GT: 3568 fixup = 0; 3569 break; 3570 case TCG_COND_NE: 3571 case TCG_COND_LE: 3572 fixup = NEED_INV; 3573 break; 3574 case TCG_COND_LT: 3575 fixup = NEED_SWAP; 3576 break; 3577 case TCG_COND_GE: 3578 fixup = NEED_SWAP | NEED_INV; 3579 break; 3580 case TCG_COND_LEU: 3581 if (vece <= MO_32) { 3582 fixup = NEED_UMIN; 3583 } else { 3584 fixup = NEED_BIAS | NEED_INV; 3585 } 3586 break; 3587 case TCG_COND_GTU: 3588 if (vece <= MO_32) { 3589 fixup = NEED_UMIN | NEED_INV; 3590 } else { 3591 fixup = NEED_BIAS; 3592 } 3593 break; 3594 case TCG_COND_GEU: 3595 if (vece <= MO_32) { 3596 fixup = NEED_UMAX; 3597 } else { 3598 fixup = NEED_BIAS | NEED_SWAP | NEED_INV; 3599 } 3600 break; 3601 case TCG_COND_LTU: 3602 if (vece <= MO_32) { 3603 fixup = NEED_UMAX | NEED_INV; 3604 } else { 3605 fixup = NEED_BIAS | NEED_SWAP; 3606 } 3607 break; 3608 default: 3609 g_assert_not_reached(); 3610 } 3611 3612 if (fixup & NEED_INV) { 3613 cond = tcg_invert_cond(cond); 3614 } 3615 if (fixup & NEED_SWAP) { 3616 t1 = v1, v1 = v2, v2 = t1; 3617 cond = tcg_swap_cond(cond); 3618 } 3619 3620 t1 = t2 = NULL; 3621 if (fixup & (NEED_UMIN | NEED_UMAX)) { 3622 t1 = tcg_temp_new_vec(type); 3623 if (fixup & NEED_UMIN) { 3624 tcg_gen_umin_vec(vece, t1, v1, v2); 3625 } else { 3626 tcg_gen_umax_vec(vece, t1, v1, v2); 3627 } 3628 v2 = t1; 3629 cond = TCG_COND_EQ; 3630 } else if (fixup & NEED_BIAS) { 3631 t1 = tcg_temp_new_vec(type); 3632 t2 = tcg_temp_new_vec(type); 3633 tcg_gen_dupi_vec(vece, t2, 1ull << ((8 << vece) - 1)); 3634 tcg_gen_sub_vec(vece, t1, v1, t2); 3635 tcg_gen_sub_vec(vece, t2, v2, t2); 3636 v1 = t1; 3637 v2 = t2; 3638 cond = tcg_signed_cond(cond); 3639 } 3640 3641 tcg_debug_assert(cond == TCG_COND_EQ || cond == TCG_COND_GT); 3642 /* Expand directly; do not recurse. */ 3643 vec_gen_4(INDEX_op_cmp_vec, type, vece, 3644 tcgv_vec_arg(v0), tcgv_vec_arg(v1), tcgv_vec_arg(v2), cond); 3645 3646 if (t1) { 3647 tcg_temp_free_vec(t1); 3648 if (t2) { 3649 tcg_temp_free_vec(t2); 3650 } 3651 } 3652 return fixup & NEED_INV; 3653} 3654 3655static void expand_vec_cmp(TCGType type, unsigned vece, TCGv_vec v0, 3656 TCGv_vec v1, TCGv_vec v2, TCGCond cond) 3657{ 3658 if (expand_vec_cmp_noinv(type, vece, v0, v1, v2, cond)) { 3659 tcg_gen_not_vec(vece, v0, v0); 3660 } 3661} 3662 3663static void expand_vec_cmpsel(TCGType type, unsigned vece, TCGv_vec v0, 3664 TCGv_vec c1, TCGv_vec c2, 3665 TCGv_vec v3, TCGv_vec v4, TCGCond cond) 3666{ 3667 TCGv_vec t = tcg_temp_new_vec(type); 3668 3669 if (expand_vec_cmp_noinv(type, vece, t, c1, c2, cond)) { 3670 /* Invert the sense of the compare by swapping arguments. */ 3671 TCGv_vec x; 3672 x = v3, v3 = v4, v4 = x; 3673 } 3674 vec_gen_4(INDEX_op_x86_vpblendvb_vec, type, vece, 3675 tcgv_vec_arg(v0), tcgv_vec_arg(v4), 3676 tcgv_vec_arg(v3), tcgv_vec_arg(t)); 3677 tcg_temp_free_vec(t); 3678} 3679 3680void tcg_expand_vec_op(TCGOpcode opc, TCGType type, unsigned vece, 3681 TCGArg a0, ...) 3682{ 3683 va_list va; 3684 TCGArg a2; 3685 TCGv_vec v0, v1, v2, v3, v4; 3686 3687 va_start(va, a0); 3688 v0 = temp_tcgv_vec(arg_temp(a0)); 3689 v1 = temp_tcgv_vec(arg_temp(va_arg(va, TCGArg))); 3690 a2 = va_arg(va, TCGArg); 3691 3692 switch (opc) { 3693 case INDEX_op_shli_vec: 3694 case INDEX_op_shri_vec: 3695 expand_vec_shi(type, vece, opc, v0, v1, a2); 3696 break; 3697 3698 case INDEX_op_sari_vec: 3699 expand_vec_sari(type, vece, v0, v1, a2); 3700 break; 3701 3702 case INDEX_op_rotli_vec: 3703 expand_vec_rotli(type, vece, v0, v1, a2); 3704 break; 3705 3706 case INDEX_op_rotls_vec: 3707 expand_vec_rotls(type, vece, v0, v1, temp_tcgv_i32(arg_temp(a2))); 3708 break; 3709 3710 case INDEX_op_rotlv_vec: 3711 v2 = temp_tcgv_vec(arg_temp(a2)); 3712 expand_vec_rotv(type, vece, v0, v1, v2, false); 3713 break; 3714 case INDEX_op_rotrv_vec: 3715 v2 = temp_tcgv_vec(arg_temp(a2)); 3716 expand_vec_rotv(type, vece, v0, v1, v2, true); 3717 break; 3718 3719 case INDEX_op_mul_vec: 3720 v2 = temp_tcgv_vec(arg_temp(a2)); 3721 expand_vec_mul(type, vece, v0, v1, v2); 3722 break; 3723 3724 case INDEX_op_cmp_vec: 3725 v2 = temp_tcgv_vec(arg_temp(a2)); 3726 expand_vec_cmp(type, vece, v0, v1, v2, va_arg(va, TCGArg)); 3727 break; 3728 3729 case INDEX_op_cmpsel_vec: 3730 v2 = temp_tcgv_vec(arg_temp(a2)); 3731 v3 = temp_tcgv_vec(arg_temp(va_arg(va, TCGArg))); 3732 v4 = temp_tcgv_vec(arg_temp(va_arg(va, TCGArg))); 3733 expand_vec_cmpsel(type, vece, v0, v1, v2, v3, v4, va_arg(va, TCGArg)); 3734 break; 3735 3736 default: 3737 break; 3738 } 3739 3740 va_end(va); 3741} 3742 3743static const int tcg_target_callee_save_regs[] = { 3744#if TCG_TARGET_REG_BITS == 64 3745 TCG_REG_RBP, 3746 TCG_REG_RBX, 3747#if defined(_WIN64) 3748 TCG_REG_RDI, 3749 TCG_REG_RSI, 3750#endif 3751 TCG_REG_R12, 3752 TCG_REG_R13, 3753 TCG_REG_R14, /* Currently used for the global env. */ 3754 TCG_REG_R15, 3755#else 3756 TCG_REG_EBP, /* Currently used for the global env. */ 3757 TCG_REG_EBX, 3758 TCG_REG_ESI, 3759 TCG_REG_EDI, 3760#endif 3761}; 3762 3763/* Compute frame size via macros, to share between tcg_target_qemu_prologue 3764 and tcg_register_jit. */ 3765 3766#define PUSH_SIZE \ 3767 ((1 + ARRAY_SIZE(tcg_target_callee_save_regs)) \ 3768 * (TCG_TARGET_REG_BITS / 8)) 3769 3770#define FRAME_SIZE \ 3771 ((PUSH_SIZE \ 3772 + TCG_STATIC_CALL_ARGS_SIZE \ 3773 + CPU_TEMP_BUF_NLONGS * sizeof(long) \ 3774 + TCG_TARGET_STACK_ALIGN - 1) \ 3775 & ~(TCG_TARGET_STACK_ALIGN - 1)) 3776 3777/* Generate global QEMU prologue and epilogue code */ 3778static void tcg_target_qemu_prologue(TCGContext *s) 3779{ 3780 int i, stack_addend; 3781 3782 /* TB prologue */ 3783 3784 /* Reserve some stack space, also for TCG temps. */ 3785 stack_addend = FRAME_SIZE - PUSH_SIZE; 3786 tcg_set_frame(s, TCG_REG_CALL_STACK, TCG_STATIC_CALL_ARGS_SIZE, 3787 CPU_TEMP_BUF_NLONGS * sizeof(long)); 3788 3789 /* Save all callee saved registers. */ 3790 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { 3791 tcg_out_push(s, tcg_target_callee_save_regs[i]); 3792 } 3793 3794#if TCG_TARGET_REG_BITS == 32 3795 tcg_out_ld(s, TCG_TYPE_PTR, TCG_AREG0, TCG_REG_ESP, 3796 (ARRAY_SIZE(tcg_target_callee_save_regs) + 1) * 4); 3797 tcg_out_addi(s, TCG_REG_ESP, -stack_addend); 3798 /* jmp *tb. */ 3799 tcg_out_modrm_offset(s, OPC_GRP5, EXT5_JMPN_Ev, TCG_REG_ESP, 3800 (ARRAY_SIZE(tcg_target_callee_save_regs) + 2) * 4 3801 + stack_addend); 3802#else 3803# if !defined(CONFIG_SOFTMMU) && TCG_TARGET_REG_BITS == 64 3804 if (guest_base) { 3805 int seg = setup_guest_base_seg(); 3806 if (seg != 0) { 3807 x86_guest_base_seg = seg; 3808 } else if (guest_base == (int32_t)guest_base) { 3809 x86_guest_base_offset = guest_base; 3810 } else { 3811 /* Choose R12 because, as a base, it requires a SIB byte. */ 3812 x86_guest_base_index = TCG_REG_R12; 3813 tcg_out_movi(s, TCG_TYPE_PTR, x86_guest_base_index, guest_base); 3814 tcg_regset_set_reg(s->reserved_regs, x86_guest_base_index); 3815 } 3816 } 3817# endif 3818 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); 3819 tcg_out_addi(s, TCG_REG_ESP, -stack_addend); 3820 /* jmp *tb. */ 3821 tcg_out_modrm(s, OPC_GRP5, EXT5_JMPN_Ev, tcg_target_call_iarg_regs[1]); 3822#endif 3823 3824 /* 3825 * Return path for goto_ptr. Set return value to 0, a-la exit_tb, 3826 * and fall through to the rest of the epilogue. 3827 */ 3828 s->code_gen_epilogue = s->code_ptr; 3829 tcg_out_movi(s, TCG_TYPE_REG, TCG_REG_EAX, 0); 3830 3831 /* TB epilogue */ 3832 tb_ret_addr = s->code_ptr; 3833 3834 tcg_out_addi(s, TCG_REG_CALL_STACK, stack_addend); 3835 3836 if (have_avx2) { 3837 tcg_out_vex_opc(s, OPC_VZEROUPPER, 0, 0, 0, 0); 3838 } 3839 for (i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) { 3840 tcg_out_pop(s, tcg_target_callee_save_regs[i]); 3841 } 3842 tcg_out_opc(s, OPC_RET, 0, 0, 0); 3843} 3844 3845static void tcg_out_nop_fill(tcg_insn_unit *p, int count) 3846{ 3847 memset(p, 0x90, count); 3848} 3849 3850static void tcg_target_init(TCGContext *s) 3851{ 3852#ifdef CONFIG_CPUID_H 3853 unsigned a, b, c, d, b7 = 0; 3854 int max = __get_cpuid_max(0, 0); 3855 3856 if (max >= 7) { 3857 /* BMI1 is available on AMD Piledriver and Intel Haswell CPUs. */ 3858 __cpuid_count(7, 0, a, b7, c, d); 3859 have_bmi1 = (b7 & bit_BMI) != 0; 3860 have_bmi2 = (b7 & bit_BMI2) != 0; 3861 } 3862 3863 if (max >= 1) { 3864 __cpuid(1, a, b, c, d); 3865#ifndef have_cmov 3866 /* For 32-bit, 99% certainty that we're running on hardware that 3867 supports cmov, but we still need to check. In case cmov is not 3868 available, we'll use a small forward branch. */ 3869 have_cmov = (d & bit_CMOV) != 0; 3870#endif 3871 3872 /* MOVBE is only available on Intel Atom and Haswell CPUs, so we 3873 need to probe for it. */ 3874 have_movbe = (c & bit_MOVBE) != 0; 3875 have_popcnt = (c & bit_POPCNT) != 0; 3876 3877 /* There are a number of things we must check before we can be 3878 sure of not hitting invalid opcode. */ 3879 if (c & bit_OSXSAVE) { 3880 unsigned xcrl, xcrh; 3881 /* The xgetbv instruction is not available to older versions of 3882 * the assembler, so we encode the instruction manually. 3883 */ 3884 asm(".byte 0x0f, 0x01, 0xd0" : "=a" (xcrl), "=d" (xcrh) : "c" (0)); 3885 if ((xcrl & 6) == 6) { 3886 have_avx1 = (c & bit_AVX) != 0; 3887 have_avx2 = (b7 & bit_AVX2) != 0; 3888 } 3889 } 3890 } 3891 3892 max = __get_cpuid_max(0x8000000, 0); 3893 if (max >= 1) { 3894 __cpuid(0x80000001, a, b, c, d); 3895 /* LZCNT was introduced with AMD Barcelona and Intel Haswell CPUs. */ 3896 have_lzcnt = (c & bit_LZCNT) != 0; 3897 } 3898#endif /* CONFIG_CPUID_H */ 3899 3900 tcg_target_available_regs[TCG_TYPE_I32] = ALL_GENERAL_REGS; 3901 if (TCG_TARGET_REG_BITS == 64) { 3902 tcg_target_available_regs[TCG_TYPE_I64] = ALL_GENERAL_REGS; 3903 } 3904 if (have_avx1) { 3905 tcg_target_available_regs[TCG_TYPE_V64] = ALL_VECTOR_REGS; 3906 tcg_target_available_regs[TCG_TYPE_V128] = ALL_VECTOR_REGS; 3907 } 3908 if (have_avx2) { 3909 tcg_target_available_regs[TCG_TYPE_V256] = ALL_VECTOR_REGS; 3910 } 3911 3912 tcg_target_call_clobber_regs = ALL_VECTOR_REGS; 3913 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_EAX); 3914 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_EDX); 3915 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_ECX); 3916 if (TCG_TARGET_REG_BITS == 64) { 3917#if !defined(_WIN64) 3918 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_RDI); 3919 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_RSI); 3920#endif 3921 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R8); 3922 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R9); 3923 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R10); 3924 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R11); 3925 } 3926 3927 s->reserved_regs = 0; 3928 tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK); 3929} 3930 3931typedef struct { 3932 DebugFrameHeader h; 3933 uint8_t fde_def_cfa[4]; 3934 uint8_t fde_reg_ofs[14]; 3935} DebugFrame; 3936 3937/* We're expecting a 2 byte uleb128 encoded value. */ 3938QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14)); 3939 3940#if !defined(__ELF__) 3941 /* Host machine without ELF. */ 3942#elif TCG_TARGET_REG_BITS == 64 3943#define ELF_HOST_MACHINE EM_X86_64 3944static const DebugFrame debug_frame = { 3945 .h.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */ 3946 .h.cie.id = -1, 3947 .h.cie.version = 1, 3948 .h.cie.code_align = 1, 3949 .h.cie.data_align = 0x78, /* sleb128 -8 */ 3950 .h.cie.return_column = 16, 3951 3952 /* Total FDE size does not include the "len" member. */ 3953 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), 3954 3955 .fde_def_cfa = { 3956 12, 7, /* DW_CFA_def_cfa %rsp, ... */ 3957 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ 3958 (FRAME_SIZE >> 7) 3959 }, 3960 .fde_reg_ofs = { 3961 0x90, 1, /* DW_CFA_offset, %rip, -8 */ 3962 /* The following ordering must match tcg_target_callee_save_regs. */ 3963 0x86, 2, /* DW_CFA_offset, %rbp, -16 */ 3964 0x83, 3, /* DW_CFA_offset, %rbx, -24 */ 3965 0x8c, 4, /* DW_CFA_offset, %r12, -32 */ 3966 0x8d, 5, /* DW_CFA_offset, %r13, -40 */ 3967 0x8e, 6, /* DW_CFA_offset, %r14, -48 */ 3968 0x8f, 7, /* DW_CFA_offset, %r15, -56 */ 3969 } 3970}; 3971#else 3972#define ELF_HOST_MACHINE EM_386 3973static const DebugFrame debug_frame = { 3974 .h.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */ 3975 .h.cie.id = -1, 3976 .h.cie.version = 1, 3977 .h.cie.code_align = 1, 3978 .h.cie.data_align = 0x7c, /* sleb128 -4 */ 3979 .h.cie.return_column = 8, 3980 3981 /* Total FDE size does not include the "len" member. */ 3982 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), 3983 3984 .fde_def_cfa = { 3985 12, 4, /* DW_CFA_def_cfa %esp, ... */ 3986 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ 3987 (FRAME_SIZE >> 7) 3988 }, 3989 .fde_reg_ofs = { 3990 0x88, 1, /* DW_CFA_offset, %eip, -4 */ 3991 /* The following ordering must match tcg_target_callee_save_regs. */ 3992 0x85, 2, /* DW_CFA_offset, %ebp, -8 */ 3993 0x83, 3, /* DW_CFA_offset, %ebx, -12 */ 3994 0x86, 4, /* DW_CFA_offset, %esi, -16 */ 3995 0x87, 5, /* DW_CFA_offset, %edi, -20 */ 3996 } 3997}; 3998#endif 3999 4000#if defined(ELF_HOST_MACHINE) 4001void tcg_register_jit(void *buf, size_t buf_size) 4002{ 4003 tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); 4004} 4005#endif 4006