1/* 2 * Tiny Code Generator for QEMU 3 * 4 * Copyright (c) 2008-2009 Arnaud Patard <arnaud.patard@rtp-net.org> 5 * Copyright (c) 2009 Aurelien Jarno <aurelien@aurel32.net> 6 * Based on i386/tcg-target.c - Copyright (c) 2008 Fabrice Bellard 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to deal 10 * in the Software without restriction, including without limitation the rights 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 * copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 * THE SOFTWARE. 25 */ 26 27#ifdef HOST_WORDS_BIGENDIAN 28# define MIPS_BE 1 29#else 30# define MIPS_BE 0 31#endif 32 33#if TCG_TARGET_REG_BITS == 32 34# define LO_OFF (MIPS_BE * 4) 35# define HI_OFF (4 - LO_OFF) 36#else 37/* To assert at compile-time that these values are never used 38 for TCG_TARGET_REG_BITS == 64. */ 39int link_error(void); 40# define LO_OFF link_error() 41# define HI_OFF link_error() 42#endif 43 44#ifdef CONFIG_DEBUG_TCG 45static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { 46 "zero", 47 "at", 48 "v0", 49 "v1", 50 "a0", 51 "a1", 52 "a2", 53 "a3", 54 "t0", 55 "t1", 56 "t2", 57 "t3", 58 "t4", 59 "t5", 60 "t6", 61 "t7", 62 "s0", 63 "s1", 64 "s2", 65 "s3", 66 "s4", 67 "s5", 68 "s6", 69 "s7", 70 "t8", 71 "t9", 72 "k0", 73 "k1", 74 "gp", 75 "sp", 76 "s8", 77 "ra", 78}; 79#endif 80 81#define TCG_TMP0 TCG_REG_AT 82#define TCG_TMP1 TCG_REG_T9 83#define TCG_TMP2 TCG_REG_T8 84#define TCG_TMP3 TCG_REG_T7 85 86#ifndef CONFIG_SOFTMMU 87#define TCG_GUEST_BASE_REG TCG_REG_S1 88#endif 89 90/* check if we really need so many registers :P */ 91static const int tcg_target_reg_alloc_order[] = { 92 /* Call saved registers. */ 93 TCG_REG_S0, 94 TCG_REG_S1, 95 TCG_REG_S2, 96 TCG_REG_S3, 97 TCG_REG_S4, 98 TCG_REG_S5, 99 TCG_REG_S6, 100 TCG_REG_S7, 101 TCG_REG_S8, 102 103 /* Call clobbered registers. */ 104 TCG_REG_T4, 105 TCG_REG_T5, 106 TCG_REG_T6, 107 TCG_REG_T7, 108 TCG_REG_T8, 109 TCG_REG_T9, 110 TCG_REG_V1, 111 TCG_REG_V0, 112 113 /* Argument registers, opposite order of allocation. */ 114 TCG_REG_T3, 115 TCG_REG_T2, 116 TCG_REG_T1, 117 TCG_REG_T0, 118 TCG_REG_A3, 119 TCG_REG_A2, 120 TCG_REG_A1, 121 TCG_REG_A0, 122}; 123 124static const TCGReg tcg_target_call_iarg_regs[] = { 125 TCG_REG_A0, 126 TCG_REG_A1, 127 TCG_REG_A2, 128 TCG_REG_A3, 129#if _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64 130 TCG_REG_T0, 131 TCG_REG_T1, 132 TCG_REG_T2, 133 TCG_REG_T3, 134#endif 135}; 136 137static const TCGReg tcg_target_call_oarg_regs[2] = { 138 TCG_REG_V0, 139 TCG_REG_V1 140}; 141 142static tcg_insn_unit *tb_ret_addr; 143static tcg_insn_unit *bswap32_addr; 144static tcg_insn_unit *bswap32u_addr; 145static tcg_insn_unit *bswap64_addr; 146 147static inline uint32_t reloc_pc16_val(tcg_insn_unit *pc, tcg_insn_unit *target) 148{ 149 /* Let the compiler perform the right-shift as part of the arithmetic. */ 150 ptrdiff_t disp = target - (pc + 1); 151 tcg_debug_assert(disp == (int16_t)disp); 152 return disp & 0xffff; 153} 154 155static inline void reloc_pc16(tcg_insn_unit *pc, tcg_insn_unit *target) 156{ 157 *pc = deposit32(*pc, 0, 16, reloc_pc16_val(pc, target)); 158} 159 160static inline uint32_t reloc_26_val(tcg_insn_unit *pc, tcg_insn_unit *target) 161{ 162 tcg_debug_assert((((uintptr_t)pc ^ (uintptr_t)target) & 0xf0000000) == 0); 163 return ((uintptr_t)target >> 2) & 0x3ffffff; 164} 165 166static inline void reloc_26(tcg_insn_unit *pc, tcg_insn_unit *target) 167{ 168 *pc = deposit32(*pc, 0, 26, reloc_26_val(pc, target)); 169} 170 171static bool patch_reloc(tcg_insn_unit *code_ptr, int type, 172 intptr_t value, intptr_t addend) 173{ 174 tcg_debug_assert(type == R_MIPS_PC16); 175 tcg_debug_assert(addend == 0); 176 reloc_pc16(code_ptr, (tcg_insn_unit *)value); 177 return true; 178} 179 180#define TCG_CT_CONST_ZERO 0x100 181#define TCG_CT_CONST_U16 0x200 /* Unsigned 16-bit: 0 - 0xffff. */ 182#define TCG_CT_CONST_S16 0x400 /* Signed 16-bit: -32768 - 32767 */ 183#define TCG_CT_CONST_P2M1 0x800 /* Power of 2 minus 1. */ 184#define TCG_CT_CONST_N16 0x1000 /* "Negatable" 16-bit: -32767 - 32767 */ 185#define TCG_CT_CONST_WSZ 0x2000 /* word size */ 186 187static inline bool is_p2m1(tcg_target_long val) 188{ 189 return val && ((val + 1) & val) == 0; 190} 191 192/* parse target specific constraints */ 193static const char *target_parse_constraint(TCGArgConstraint *ct, 194 const char *ct_str, TCGType type) 195{ 196 switch(*ct_str++) { 197 case 'r': 198 ct->ct |= TCG_CT_REG; 199 ct->u.regs = 0xffffffff; 200 break; 201 case 'L': /* qemu_ld input arg constraint */ 202 ct->ct |= TCG_CT_REG; 203 ct->u.regs = 0xffffffff; 204 tcg_regset_reset_reg(ct->u.regs, TCG_REG_A0); 205#if defined(CONFIG_SOFTMMU) 206 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 207 tcg_regset_reset_reg(ct->u.regs, TCG_REG_A2); 208 } 209#endif 210 break; 211 case 'S': /* qemu_st constraint */ 212 ct->ct |= TCG_CT_REG; 213 ct->u.regs = 0xffffffff; 214 tcg_regset_reset_reg(ct->u.regs, TCG_REG_A0); 215#if defined(CONFIG_SOFTMMU) 216 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 217 tcg_regset_reset_reg(ct->u.regs, TCG_REG_A2); 218 tcg_regset_reset_reg(ct->u.regs, TCG_REG_A3); 219 } else { 220 tcg_regset_reset_reg(ct->u.regs, TCG_REG_A1); 221 } 222#endif 223 break; 224 case 'I': 225 ct->ct |= TCG_CT_CONST_U16; 226 break; 227 case 'J': 228 ct->ct |= TCG_CT_CONST_S16; 229 break; 230 case 'K': 231 ct->ct |= TCG_CT_CONST_P2M1; 232 break; 233 case 'N': 234 ct->ct |= TCG_CT_CONST_N16; 235 break; 236 case 'W': 237 ct->ct |= TCG_CT_CONST_WSZ; 238 break; 239 case 'Z': 240 /* We are cheating a bit here, using the fact that the register 241 ZERO is also the register number 0. Hence there is no need 242 to check for const_args in each instruction. */ 243 ct->ct |= TCG_CT_CONST_ZERO; 244 break; 245 default: 246 return NULL; 247 } 248 return ct_str; 249} 250 251/* test if a constant matches the constraint */ 252static inline int tcg_target_const_match(tcg_target_long val, TCGType type, 253 const TCGArgConstraint *arg_ct) 254{ 255 int ct; 256 ct = arg_ct->ct; 257 if (ct & TCG_CT_CONST) { 258 return 1; 259 } else if ((ct & TCG_CT_CONST_ZERO) && val == 0) { 260 return 1; 261 } else if ((ct & TCG_CT_CONST_U16) && val == (uint16_t)val) { 262 return 1; 263 } else if ((ct & TCG_CT_CONST_S16) && val == (int16_t)val) { 264 return 1; 265 } else if ((ct & TCG_CT_CONST_N16) && val >= -32767 && val <= 32767) { 266 return 1; 267 } else if ((ct & TCG_CT_CONST_P2M1) 268 && use_mips32r2_instructions && is_p2m1(val)) { 269 return 1; 270 } else if ((ct & TCG_CT_CONST_WSZ) 271 && val == (type == TCG_TYPE_I32 ? 32 : 64)) { 272 return 1; 273 } 274 return 0; 275} 276 277/* instruction opcodes */ 278typedef enum { 279 OPC_J = 002 << 26, 280 OPC_JAL = 003 << 26, 281 OPC_BEQ = 004 << 26, 282 OPC_BNE = 005 << 26, 283 OPC_BLEZ = 006 << 26, 284 OPC_BGTZ = 007 << 26, 285 OPC_ADDIU = 011 << 26, 286 OPC_SLTI = 012 << 26, 287 OPC_SLTIU = 013 << 26, 288 OPC_ANDI = 014 << 26, 289 OPC_ORI = 015 << 26, 290 OPC_XORI = 016 << 26, 291 OPC_LUI = 017 << 26, 292 OPC_DADDIU = 031 << 26, 293 OPC_LB = 040 << 26, 294 OPC_LH = 041 << 26, 295 OPC_LW = 043 << 26, 296 OPC_LBU = 044 << 26, 297 OPC_LHU = 045 << 26, 298 OPC_LWU = 047 << 26, 299 OPC_SB = 050 << 26, 300 OPC_SH = 051 << 26, 301 OPC_SW = 053 << 26, 302 OPC_LD = 067 << 26, 303 OPC_SD = 077 << 26, 304 305 OPC_SPECIAL = 000 << 26, 306 OPC_SLL = OPC_SPECIAL | 000, 307 OPC_SRL = OPC_SPECIAL | 002, 308 OPC_ROTR = OPC_SPECIAL | 002 | (1 << 21), 309 OPC_SRA = OPC_SPECIAL | 003, 310 OPC_SLLV = OPC_SPECIAL | 004, 311 OPC_SRLV = OPC_SPECIAL | 006, 312 OPC_ROTRV = OPC_SPECIAL | 006 | 0100, 313 OPC_SRAV = OPC_SPECIAL | 007, 314 OPC_JR_R5 = OPC_SPECIAL | 010, 315 OPC_JALR = OPC_SPECIAL | 011, 316 OPC_MOVZ = OPC_SPECIAL | 012, 317 OPC_MOVN = OPC_SPECIAL | 013, 318 OPC_SYNC = OPC_SPECIAL | 017, 319 OPC_MFHI = OPC_SPECIAL | 020, 320 OPC_MFLO = OPC_SPECIAL | 022, 321 OPC_DSLLV = OPC_SPECIAL | 024, 322 OPC_DSRLV = OPC_SPECIAL | 026, 323 OPC_DROTRV = OPC_SPECIAL | 026 | 0100, 324 OPC_DSRAV = OPC_SPECIAL | 027, 325 OPC_MULT = OPC_SPECIAL | 030, 326 OPC_MUL_R6 = OPC_SPECIAL | 030 | 0200, 327 OPC_MUH = OPC_SPECIAL | 030 | 0300, 328 OPC_MULTU = OPC_SPECIAL | 031, 329 OPC_MULU = OPC_SPECIAL | 031 | 0200, 330 OPC_MUHU = OPC_SPECIAL | 031 | 0300, 331 OPC_DIV = OPC_SPECIAL | 032, 332 OPC_DIV_R6 = OPC_SPECIAL | 032 | 0200, 333 OPC_MOD = OPC_SPECIAL | 032 | 0300, 334 OPC_DIVU = OPC_SPECIAL | 033, 335 OPC_DIVU_R6 = OPC_SPECIAL | 033 | 0200, 336 OPC_MODU = OPC_SPECIAL | 033 | 0300, 337 OPC_DMULT = OPC_SPECIAL | 034, 338 OPC_DMUL = OPC_SPECIAL | 034 | 0200, 339 OPC_DMUH = OPC_SPECIAL | 034 | 0300, 340 OPC_DMULTU = OPC_SPECIAL | 035, 341 OPC_DMULU = OPC_SPECIAL | 035 | 0200, 342 OPC_DMUHU = OPC_SPECIAL | 035 | 0300, 343 OPC_DDIV = OPC_SPECIAL | 036, 344 OPC_DDIV_R6 = OPC_SPECIAL | 036 | 0200, 345 OPC_DMOD = OPC_SPECIAL | 036 | 0300, 346 OPC_DDIVU = OPC_SPECIAL | 037, 347 OPC_DDIVU_R6 = OPC_SPECIAL | 037 | 0200, 348 OPC_DMODU = OPC_SPECIAL | 037 | 0300, 349 OPC_ADDU = OPC_SPECIAL | 041, 350 OPC_SUBU = OPC_SPECIAL | 043, 351 OPC_AND = OPC_SPECIAL | 044, 352 OPC_OR = OPC_SPECIAL | 045, 353 OPC_XOR = OPC_SPECIAL | 046, 354 OPC_NOR = OPC_SPECIAL | 047, 355 OPC_SLT = OPC_SPECIAL | 052, 356 OPC_SLTU = OPC_SPECIAL | 053, 357 OPC_DADDU = OPC_SPECIAL | 055, 358 OPC_DSUBU = OPC_SPECIAL | 057, 359 OPC_SELEQZ = OPC_SPECIAL | 065, 360 OPC_SELNEZ = OPC_SPECIAL | 067, 361 OPC_DSLL = OPC_SPECIAL | 070, 362 OPC_DSRL = OPC_SPECIAL | 072, 363 OPC_DROTR = OPC_SPECIAL | 072 | (1 << 21), 364 OPC_DSRA = OPC_SPECIAL | 073, 365 OPC_DSLL32 = OPC_SPECIAL | 074, 366 OPC_DSRL32 = OPC_SPECIAL | 076, 367 OPC_DROTR32 = OPC_SPECIAL | 076 | (1 << 21), 368 OPC_DSRA32 = OPC_SPECIAL | 077, 369 OPC_CLZ_R6 = OPC_SPECIAL | 0120, 370 OPC_DCLZ_R6 = OPC_SPECIAL | 0122, 371 372 OPC_REGIMM = 001 << 26, 373 OPC_BLTZ = OPC_REGIMM | (000 << 16), 374 OPC_BGEZ = OPC_REGIMM | (001 << 16), 375 376 OPC_SPECIAL2 = 034 << 26, 377 OPC_MUL_R5 = OPC_SPECIAL2 | 002, 378 OPC_CLZ = OPC_SPECIAL2 | 040, 379 OPC_DCLZ = OPC_SPECIAL2 | 044, 380 381 OPC_SPECIAL3 = 037 << 26, 382 OPC_EXT = OPC_SPECIAL3 | 000, 383 OPC_DEXTM = OPC_SPECIAL3 | 001, 384 OPC_DEXTU = OPC_SPECIAL3 | 002, 385 OPC_DEXT = OPC_SPECIAL3 | 003, 386 OPC_INS = OPC_SPECIAL3 | 004, 387 OPC_DINSM = OPC_SPECIAL3 | 005, 388 OPC_DINSU = OPC_SPECIAL3 | 006, 389 OPC_DINS = OPC_SPECIAL3 | 007, 390 OPC_WSBH = OPC_SPECIAL3 | 00240, 391 OPC_DSBH = OPC_SPECIAL3 | 00244, 392 OPC_DSHD = OPC_SPECIAL3 | 00544, 393 OPC_SEB = OPC_SPECIAL3 | 02040, 394 OPC_SEH = OPC_SPECIAL3 | 03040, 395 396 /* MIPS r6 doesn't have JR, JALR should be used instead */ 397 OPC_JR = use_mips32r6_instructions ? OPC_JALR : OPC_JR_R5, 398 399 /* 400 * MIPS r6 replaces MUL with an alternative encoding which is 401 * backwards-compatible at the assembly level. 402 */ 403 OPC_MUL = use_mips32r6_instructions ? OPC_MUL_R6 : OPC_MUL_R5, 404 405 /* MIPS r6 introduced names for weaker variants of SYNC. These are 406 backward compatible to previous architecture revisions. */ 407 OPC_SYNC_WMB = OPC_SYNC | 0x04 << 6, 408 OPC_SYNC_MB = OPC_SYNC | 0x10 << 6, 409 OPC_SYNC_ACQUIRE = OPC_SYNC | 0x11 << 6, 410 OPC_SYNC_RELEASE = OPC_SYNC | 0x12 << 6, 411 OPC_SYNC_RMB = OPC_SYNC | 0x13 << 6, 412 413 /* Aliases for convenience. */ 414 ALIAS_PADD = sizeof(void *) == 4 ? OPC_ADDU : OPC_DADDU, 415 ALIAS_PADDI = sizeof(void *) == 4 ? OPC_ADDIU : OPC_DADDIU, 416 ALIAS_TSRL = TARGET_LONG_BITS == 32 || TCG_TARGET_REG_BITS == 32 417 ? OPC_SRL : OPC_DSRL, 418} MIPSInsn; 419 420/* 421 * Type reg 422 */ 423static inline void tcg_out_opc_reg(TCGContext *s, MIPSInsn opc, 424 TCGReg rd, TCGReg rs, TCGReg rt) 425{ 426 int32_t inst; 427 428 inst = opc; 429 inst |= (rs & 0x1F) << 21; 430 inst |= (rt & 0x1F) << 16; 431 inst |= (rd & 0x1F) << 11; 432 tcg_out32(s, inst); 433} 434 435/* 436 * Type immediate 437 */ 438static inline void tcg_out_opc_imm(TCGContext *s, MIPSInsn opc, 439 TCGReg rt, TCGReg rs, TCGArg imm) 440{ 441 int32_t inst; 442 443 inst = opc; 444 inst |= (rs & 0x1F) << 21; 445 inst |= (rt & 0x1F) << 16; 446 inst |= (imm & 0xffff); 447 tcg_out32(s, inst); 448} 449 450/* 451 * Type bitfield 452 */ 453static inline void tcg_out_opc_bf(TCGContext *s, MIPSInsn opc, TCGReg rt, 454 TCGReg rs, int msb, int lsb) 455{ 456 int32_t inst; 457 458 inst = opc; 459 inst |= (rs & 0x1F) << 21; 460 inst |= (rt & 0x1F) << 16; 461 inst |= (msb & 0x1F) << 11; 462 inst |= (lsb & 0x1F) << 6; 463 tcg_out32(s, inst); 464} 465 466static inline void tcg_out_opc_bf64(TCGContext *s, MIPSInsn opc, MIPSInsn opm, 467 MIPSInsn oph, TCGReg rt, TCGReg rs, 468 int msb, int lsb) 469{ 470 if (lsb >= 32) { 471 opc = oph; 472 msb -= 32; 473 lsb -= 32; 474 } else if (msb >= 32) { 475 opc = opm; 476 msb -= 32; 477 } 478 tcg_out_opc_bf(s, opc, rt, rs, msb, lsb); 479} 480 481/* 482 * Type branch 483 */ 484static inline void tcg_out_opc_br(TCGContext *s, MIPSInsn opc, 485 TCGReg rt, TCGReg rs) 486{ 487 tcg_out_opc_imm(s, opc, rt, rs, 0); 488} 489 490/* 491 * Type sa 492 */ 493static inline void tcg_out_opc_sa(TCGContext *s, MIPSInsn opc, 494 TCGReg rd, TCGReg rt, TCGArg sa) 495{ 496 int32_t inst; 497 498 inst = opc; 499 inst |= (rt & 0x1F) << 16; 500 inst |= (rd & 0x1F) << 11; 501 inst |= (sa & 0x1F) << 6; 502 tcg_out32(s, inst); 503 504} 505 506static void tcg_out_opc_sa64(TCGContext *s, MIPSInsn opc1, MIPSInsn opc2, 507 TCGReg rd, TCGReg rt, TCGArg sa) 508{ 509 int32_t inst; 510 511 inst = (sa & 32 ? opc2 : opc1); 512 inst |= (rt & 0x1F) << 16; 513 inst |= (rd & 0x1F) << 11; 514 inst |= (sa & 0x1F) << 6; 515 tcg_out32(s, inst); 516} 517 518/* 519 * Type jump. 520 * Returns true if the branch was in range and the insn was emitted. 521 */ 522static bool tcg_out_opc_jmp(TCGContext *s, MIPSInsn opc, void *target) 523{ 524 uintptr_t dest = (uintptr_t)target; 525 uintptr_t from = (uintptr_t)s->code_ptr + 4; 526 int32_t inst; 527 528 /* The pc-region branch happens within the 256MB region of 529 the delay slot (thus the +4). */ 530 if ((from ^ dest) & -(1 << 28)) { 531 return false; 532 } 533 tcg_debug_assert((dest & 3) == 0); 534 535 inst = opc; 536 inst |= (dest >> 2) & 0x3ffffff; 537 tcg_out32(s, inst); 538 return true; 539} 540 541static inline void tcg_out_nop(TCGContext *s) 542{ 543 tcg_out32(s, 0); 544} 545 546static inline void tcg_out_dsll(TCGContext *s, TCGReg rd, TCGReg rt, TCGArg sa) 547{ 548 tcg_out_opc_sa64(s, OPC_DSLL, OPC_DSLL32, rd, rt, sa); 549} 550 551static inline void tcg_out_dsrl(TCGContext *s, TCGReg rd, TCGReg rt, TCGArg sa) 552{ 553 tcg_out_opc_sa64(s, OPC_DSRL, OPC_DSRL32, rd, rt, sa); 554} 555 556static inline void tcg_out_dsra(TCGContext *s, TCGReg rd, TCGReg rt, TCGArg sa) 557{ 558 tcg_out_opc_sa64(s, OPC_DSRA, OPC_DSRA32, rd, rt, sa); 559} 560 561static inline bool tcg_out_mov(TCGContext *s, TCGType type, 562 TCGReg ret, TCGReg arg) 563{ 564 /* Simple reg-reg move, optimising out the 'do nothing' case */ 565 if (ret != arg) { 566 tcg_out_opc_reg(s, OPC_OR, ret, arg, TCG_REG_ZERO); 567 } 568 return true; 569} 570 571static void tcg_out_movi(TCGContext *s, TCGType type, 572 TCGReg ret, tcg_target_long arg) 573{ 574 if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) { 575 arg = (int32_t)arg; 576 } 577 if (arg == (int16_t)arg) { 578 tcg_out_opc_imm(s, OPC_ADDIU, ret, TCG_REG_ZERO, arg); 579 return; 580 } 581 if (arg == (uint16_t)arg) { 582 tcg_out_opc_imm(s, OPC_ORI, ret, TCG_REG_ZERO, arg); 583 return; 584 } 585 if (TCG_TARGET_REG_BITS == 32 || arg == (int32_t)arg) { 586 tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16); 587 } else { 588 tcg_out_movi(s, TCG_TYPE_I32, ret, arg >> 31 >> 1); 589 if (arg & 0xffff0000ull) { 590 tcg_out_dsll(s, ret, ret, 16); 591 tcg_out_opc_imm(s, OPC_ORI, ret, ret, arg >> 16); 592 tcg_out_dsll(s, ret, ret, 16); 593 } else { 594 tcg_out_dsll(s, ret, ret, 32); 595 } 596 } 597 if (arg & 0xffff) { 598 tcg_out_opc_imm(s, OPC_ORI, ret, ret, arg & 0xffff); 599 } 600} 601 602static inline void tcg_out_bswap16(TCGContext *s, TCGReg ret, TCGReg arg) 603{ 604 if (use_mips32r2_instructions) { 605 tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg); 606 } else { 607 /* ret and arg can't be register at */ 608 if (ret == TCG_TMP0 || arg == TCG_TMP0) { 609 tcg_abort(); 610 } 611 612 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP0, arg, 8); 613 tcg_out_opc_sa(s, OPC_SLL, ret, arg, 8); 614 tcg_out_opc_imm(s, OPC_ANDI, ret, ret, 0xff00); 615 tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_TMP0); 616 } 617} 618 619static inline void tcg_out_bswap16s(TCGContext *s, TCGReg ret, TCGReg arg) 620{ 621 if (use_mips32r2_instructions) { 622 tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg); 623 tcg_out_opc_reg(s, OPC_SEH, ret, 0, ret); 624 } else { 625 /* ret and arg can't be register at */ 626 if (ret == TCG_TMP0 || arg == TCG_TMP0) { 627 tcg_abort(); 628 } 629 630 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP0, arg, 8); 631 tcg_out_opc_sa(s, OPC_SLL, ret, arg, 24); 632 tcg_out_opc_sa(s, OPC_SRA, ret, ret, 16); 633 tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_TMP0); 634 } 635} 636 637static void tcg_out_bswap_subr(TCGContext *s, tcg_insn_unit *sub) 638{ 639 bool ok = tcg_out_opc_jmp(s, OPC_JAL, sub); 640 tcg_debug_assert(ok); 641} 642 643static void tcg_out_bswap32(TCGContext *s, TCGReg ret, TCGReg arg) 644{ 645 if (use_mips32r2_instructions) { 646 tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg); 647 tcg_out_opc_sa(s, OPC_ROTR, ret, ret, 16); 648 } else { 649 tcg_out_bswap_subr(s, bswap32_addr); 650 /* delay slot -- never omit the insn, like tcg_out_mov might. */ 651 tcg_out_opc_reg(s, OPC_OR, TCG_TMP0, arg, TCG_REG_ZERO); 652 tcg_out_mov(s, TCG_TYPE_I32, ret, TCG_TMP3); 653 } 654} 655 656static void tcg_out_bswap32u(TCGContext *s, TCGReg ret, TCGReg arg) 657{ 658 if (use_mips32r2_instructions) { 659 tcg_out_opc_reg(s, OPC_DSBH, ret, 0, arg); 660 tcg_out_opc_reg(s, OPC_DSHD, ret, 0, ret); 661 tcg_out_dsrl(s, ret, ret, 32); 662 } else { 663 tcg_out_bswap_subr(s, bswap32u_addr); 664 /* delay slot -- never omit the insn, like tcg_out_mov might. */ 665 tcg_out_opc_reg(s, OPC_OR, TCG_TMP0, arg, TCG_REG_ZERO); 666 tcg_out_mov(s, TCG_TYPE_I32, ret, TCG_TMP3); 667 } 668} 669 670static void tcg_out_bswap64(TCGContext *s, TCGReg ret, TCGReg arg) 671{ 672 if (use_mips32r2_instructions) { 673 tcg_out_opc_reg(s, OPC_DSBH, ret, 0, arg); 674 tcg_out_opc_reg(s, OPC_DSHD, ret, 0, ret); 675 } else { 676 tcg_out_bswap_subr(s, bswap64_addr); 677 /* delay slot -- never omit the insn, like tcg_out_mov might. */ 678 tcg_out_opc_reg(s, OPC_OR, TCG_TMP0, arg, TCG_REG_ZERO); 679 tcg_out_mov(s, TCG_TYPE_I32, ret, TCG_TMP3); 680 } 681} 682 683static inline void tcg_out_ext8s(TCGContext *s, TCGReg ret, TCGReg arg) 684{ 685 if (use_mips32r2_instructions) { 686 tcg_out_opc_reg(s, OPC_SEB, ret, 0, arg); 687 } else { 688 tcg_out_opc_sa(s, OPC_SLL, ret, arg, 24); 689 tcg_out_opc_sa(s, OPC_SRA, ret, ret, 24); 690 } 691} 692 693static inline void tcg_out_ext16s(TCGContext *s, TCGReg ret, TCGReg arg) 694{ 695 if (use_mips32r2_instructions) { 696 tcg_out_opc_reg(s, OPC_SEH, ret, 0, arg); 697 } else { 698 tcg_out_opc_sa(s, OPC_SLL, ret, arg, 16); 699 tcg_out_opc_sa(s, OPC_SRA, ret, ret, 16); 700 } 701} 702 703static inline void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg) 704{ 705 if (use_mips32r2_instructions) { 706 tcg_out_opc_bf(s, OPC_DEXT, ret, arg, 31, 0); 707 } else { 708 tcg_out_dsll(s, ret, arg, 32); 709 tcg_out_dsrl(s, ret, ret, 32); 710 } 711} 712 713static void tcg_out_ldst(TCGContext *s, MIPSInsn opc, TCGReg data, 714 TCGReg addr, intptr_t ofs) 715{ 716 int16_t lo = ofs; 717 if (ofs != lo) { 718 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, ofs - lo); 719 if (addr != TCG_REG_ZERO) { 720 tcg_out_opc_reg(s, ALIAS_PADD, TCG_TMP0, TCG_TMP0, addr); 721 } 722 addr = TCG_TMP0; 723 } 724 tcg_out_opc_imm(s, opc, data, addr, lo); 725} 726 727static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, 728 TCGReg arg1, intptr_t arg2) 729{ 730 MIPSInsn opc = OPC_LD; 731 if (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32) { 732 opc = OPC_LW; 733 } 734 tcg_out_ldst(s, opc, arg, arg1, arg2); 735} 736 737static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, 738 TCGReg arg1, intptr_t arg2) 739{ 740 MIPSInsn opc = OPC_SD; 741 if (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32) { 742 opc = OPC_SW; 743 } 744 tcg_out_ldst(s, opc, arg, arg1, arg2); 745} 746 747static inline bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, 748 TCGReg base, intptr_t ofs) 749{ 750 if (val == 0) { 751 tcg_out_st(s, type, TCG_REG_ZERO, base, ofs); 752 return true; 753 } 754 return false; 755} 756 757static void tcg_out_addsub2(TCGContext *s, TCGReg rl, TCGReg rh, TCGReg al, 758 TCGReg ah, TCGArg bl, TCGArg bh, bool cbl, 759 bool cbh, bool is_sub) 760{ 761 TCGReg th = TCG_TMP1; 762 763 /* If we have a negative constant such that negating it would 764 make the high part zero, we can (usually) eliminate one insn. */ 765 if (cbl && cbh && bh == -1 && bl != 0) { 766 bl = -bl; 767 bh = 0; 768 is_sub = !is_sub; 769 } 770 771 /* By operating on the high part first, we get to use the final 772 carry operation to move back from the temporary. */ 773 if (!cbh) { 774 tcg_out_opc_reg(s, (is_sub ? OPC_SUBU : OPC_ADDU), th, ah, bh); 775 } else if (bh != 0 || ah == rl) { 776 tcg_out_opc_imm(s, OPC_ADDIU, th, ah, (is_sub ? -bh : bh)); 777 } else { 778 th = ah; 779 } 780 781 /* Note that tcg optimization should eliminate the bl == 0 case. */ 782 if (is_sub) { 783 if (cbl) { 784 tcg_out_opc_imm(s, OPC_SLTIU, TCG_TMP0, al, bl); 785 tcg_out_opc_imm(s, OPC_ADDIU, rl, al, -bl); 786 } else { 787 tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, al, bl); 788 tcg_out_opc_reg(s, OPC_SUBU, rl, al, bl); 789 } 790 tcg_out_opc_reg(s, OPC_SUBU, rh, th, TCG_TMP0); 791 } else { 792 if (cbl) { 793 tcg_out_opc_imm(s, OPC_ADDIU, rl, al, bl); 794 tcg_out_opc_imm(s, OPC_SLTIU, TCG_TMP0, rl, bl); 795 } else if (rl == al && rl == bl) { 796 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP0, al, TCG_TARGET_REG_BITS - 1); 797 tcg_out_opc_reg(s, OPC_ADDU, rl, al, bl); 798 } else { 799 tcg_out_opc_reg(s, OPC_ADDU, rl, al, bl); 800 tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, rl, (rl == bl ? al : bl)); 801 } 802 tcg_out_opc_reg(s, OPC_ADDU, rh, th, TCG_TMP0); 803 } 804} 805 806/* Bit 0 set if inversion required; bit 1 set if swapping required. */ 807#define MIPS_CMP_INV 1 808#define MIPS_CMP_SWAP 2 809 810static const uint8_t mips_cmp_map[16] = { 811 [TCG_COND_LT] = 0, 812 [TCG_COND_LTU] = 0, 813 [TCG_COND_GE] = MIPS_CMP_INV, 814 [TCG_COND_GEU] = MIPS_CMP_INV, 815 [TCG_COND_LE] = MIPS_CMP_INV | MIPS_CMP_SWAP, 816 [TCG_COND_LEU] = MIPS_CMP_INV | MIPS_CMP_SWAP, 817 [TCG_COND_GT] = MIPS_CMP_SWAP, 818 [TCG_COND_GTU] = MIPS_CMP_SWAP, 819}; 820 821static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret, 822 TCGReg arg1, TCGReg arg2) 823{ 824 MIPSInsn s_opc = OPC_SLTU; 825 int cmp_map; 826 827 switch (cond) { 828 case TCG_COND_EQ: 829 if (arg2 != 0) { 830 tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); 831 arg1 = ret; 832 } 833 tcg_out_opc_imm(s, OPC_SLTIU, ret, arg1, 1); 834 break; 835 836 case TCG_COND_NE: 837 if (arg2 != 0) { 838 tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); 839 arg1 = ret; 840 } 841 tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, arg1); 842 break; 843 844 case TCG_COND_LT: 845 case TCG_COND_GE: 846 case TCG_COND_LE: 847 case TCG_COND_GT: 848 s_opc = OPC_SLT; 849 /* FALLTHRU */ 850 851 case TCG_COND_LTU: 852 case TCG_COND_GEU: 853 case TCG_COND_LEU: 854 case TCG_COND_GTU: 855 cmp_map = mips_cmp_map[cond]; 856 if (cmp_map & MIPS_CMP_SWAP) { 857 TCGReg t = arg1; 858 arg1 = arg2; 859 arg2 = t; 860 } 861 tcg_out_opc_reg(s, s_opc, ret, arg1, arg2); 862 if (cmp_map & MIPS_CMP_INV) { 863 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); 864 } 865 break; 866 867 default: 868 tcg_abort(); 869 break; 870 } 871} 872 873static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1, 874 TCGReg arg2, TCGLabel *l) 875{ 876 static const MIPSInsn b_zero[16] = { 877 [TCG_COND_LT] = OPC_BLTZ, 878 [TCG_COND_GT] = OPC_BGTZ, 879 [TCG_COND_LE] = OPC_BLEZ, 880 [TCG_COND_GE] = OPC_BGEZ, 881 }; 882 883 MIPSInsn s_opc = OPC_SLTU; 884 MIPSInsn b_opc; 885 int cmp_map; 886 887 switch (cond) { 888 case TCG_COND_EQ: 889 b_opc = OPC_BEQ; 890 break; 891 case TCG_COND_NE: 892 b_opc = OPC_BNE; 893 break; 894 895 case TCG_COND_LT: 896 case TCG_COND_GT: 897 case TCG_COND_LE: 898 case TCG_COND_GE: 899 if (arg2 == 0) { 900 b_opc = b_zero[cond]; 901 arg2 = arg1; 902 arg1 = 0; 903 break; 904 } 905 s_opc = OPC_SLT; 906 /* FALLTHRU */ 907 908 case TCG_COND_LTU: 909 case TCG_COND_GTU: 910 case TCG_COND_LEU: 911 case TCG_COND_GEU: 912 cmp_map = mips_cmp_map[cond]; 913 if (cmp_map & MIPS_CMP_SWAP) { 914 TCGReg t = arg1; 915 arg1 = arg2; 916 arg2 = t; 917 } 918 tcg_out_opc_reg(s, s_opc, TCG_TMP0, arg1, arg2); 919 b_opc = (cmp_map & MIPS_CMP_INV ? OPC_BEQ : OPC_BNE); 920 arg1 = TCG_TMP0; 921 arg2 = TCG_REG_ZERO; 922 break; 923 924 default: 925 tcg_abort(); 926 break; 927 } 928 929 tcg_out_opc_br(s, b_opc, arg1, arg2); 930 if (l->has_value) { 931 reloc_pc16(s->code_ptr - 1, l->u.value_ptr); 932 } else { 933 tcg_out_reloc(s, s->code_ptr - 1, R_MIPS_PC16, l, 0); 934 } 935 tcg_out_nop(s); 936} 937 938static TCGReg tcg_out_reduce_eq2(TCGContext *s, TCGReg tmp0, TCGReg tmp1, 939 TCGReg al, TCGReg ah, 940 TCGReg bl, TCGReg bh) 941{ 942 /* Merge highpart comparison into AH. */ 943 if (bh != 0) { 944 if (ah != 0) { 945 tcg_out_opc_reg(s, OPC_XOR, tmp0, ah, bh); 946 ah = tmp0; 947 } else { 948 ah = bh; 949 } 950 } 951 /* Merge lowpart comparison into AL. */ 952 if (bl != 0) { 953 if (al != 0) { 954 tcg_out_opc_reg(s, OPC_XOR, tmp1, al, bl); 955 al = tmp1; 956 } else { 957 al = bl; 958 } 959 } 960 /* Merge high and low part comparisons into AL. */ 961 if (ah != 0) { 962 if (al != 0) { 963 tcg_out_opc_reg(s, OPC_OR, tmp0, ah, al); 964 al = tmp0; 965 } else { 966 al = ah; 967 } 968 } 969 return al; 970} 971 972static void tcg_out_setcond2(TCGContext *s, TCGCond cond, TCGReg ret, 973 TCGReg al, TCGReg ah, TCGReg bl, TCGReg bh) 974{ 975 TCGReg tmp0 = TCG_TMP0; 976 TCGReg tmp1 = ret; 977 978 tcg_debug_assert(ret != TCG_TMP0); 979 if (ret == ah || ret == bh) { 980 tcg_debug_assert(ret != TCG_TMP1); 981 tmp1 = TCG_TMP1; 982 } 983 984 switch (cond) { 985 case TCG_COND_EQ: 986 case TCG_COND_NE: 987 tmp1 = tcg_out_reduce_eq2(s, tmp0, tmp1, al, ah, bl, bh); 988 tcg_out_setcond(s, cond, ret, tmp1, TCG_REG_ZERO); 989 break; 990 991 default: 992 tcg_out_setcond(s, TCG_COND_EQ, tmp0, ah, bh); 993 tcg_out_setcond(s, tcg_unsigned_cond(cond), tmp1, al, bl); 994 tcg_out_opc_reg(s, OPC_AND, tmp1, tmp1, tmp0); 995 tcg_out_setcond(s, tcg_high_cond(cond), tmp0, ah, bh); 996 tcg_out_opc_reg(s, OPC_OR, ret, tmp1, tmp0); 997 break; 998 } 999} 1000 1001static void tcg_out_brcond2(TCGContext *s, TCGCond cond, TCGReg al, TCGReg ah, 1002 TCGReg bl, TCGReg bh, TCGLabel *l) 1003{ 1004 TCGCond b_cond = TCG_COND_NE; 1005 TCGReg tmp = TCG_TMP1; 1006 1007 /* With branches, we emit between 4 and 9 insns with 2 or 3 branches. 1008 With setcond, we emit between 3 and 10 insns and only 1 branch, 1009 which ought to get better branch prediction. */ 1010 switch (cond) { 1011 case TCG_COND_EQ: 1012 case TCG_COND_NE: 1013 b_cond = cond; 1014 tmp = tcg_out_reduce_eq2(s, TCG_TMP0, TCG_TMP1, al, ah, bl, bh); 1015 break; 1016 1017 default: 1018 /* Minimize code size by preferring a compare not requiring INV. */ 1019 if (mips_cmp_map[cond] & MIPS_CMP_INV) { 1020 cond = tcg_invert_cond(cond); 1021 b_cond = TCG_COND_EQ; 1022 } 1023 tcg_out_setcond2(s, cond, tmp, al, ah, bl, bh); 1024 break; 1025 } 1026 1027 tcg_out_brcond(s, b_cond, tmp, TCG_REG_ZERO, l); 1028} 1029 1030static void tcg_out_movcond(TCGContext *s, TCGCond cond, TCGReg ret, 1031 TCGReg c1, TCGReg c2, TCGReg v1, TCGReg v2) 1032{ 1033 bool eqz = false; 1034 1035 /* If one of the values is zero, put it last to match SEL*Z instructions */ 1036 if (use_mips32r6_instructions && v1 == 0) { 1037 v1 = v2; 1038 v2 = 0; 1039 cond = tcg_invert_cond(cond); 1040 } 1041 1042 switch (cond) { 1043 case TCG_COND_EQ: 1044 eqz = true; 1045 /* FALLTHRU */ 1046 case TCG_COND_NE: 1047 if (c2 != 0) { 1048 tcg_out_opc_reg(s, OPC_XOR, TCG_TMP0, c1, c2); 1049 c1 = TCG_TMP0; 1050 } 1051 break; 1052 1053 default: 1054 /* Minimize code size by preferring a compare not requiring INV. */ 1055 if (mips_cmp_map[cond] & MIPS_CMP_INV) { 1056 cond = tcg_invert_cond(cond); 1057 eqz = true; 1058 } 1059 tcg_out_setcond(s, cond, TCG_TMP0, c1, c2); 1060 c1 = TCG_TMP0; 1061 break; 1062 } 1063 1064 if (use_mips32r6_instructions) { 1065 MIPSInsn m_opc_t = eqz ? OPC_SELEQZ : OPC_SELNEZ; 1066 MIPSInsn m_opc_f = eqz ? OPC_SELNEZ : OPC_SELEQZ; 1067 1068 if (v2 != 0) { 1069 tcg_out_opc_reg(s, m_opc_f, TCG_TMP1, v2, c1); 1070 } 1071 tcg_out_opc_reg(s, m_opc_t, ret, v1, c1); 1072 if (v2 != 0) { 1073 tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_TMP1); 1074 } 1075 } else { 1076 MIPSInsn m_opc = eqz ? OPC_MOVZ : OPC_MOVN; 1077 1078 tcg_out_opc_reg(s, m_opc, ret, v1, c1); 1079 1080 /* This should be guaranteed via constraints */ 1081 tcg_debug_assert(v2 == ret); 1082 } 1083} 1084 1085static void tcg_out_call_int(TCGContext *s, tcg_insn_unit *arg, bool tail) 1086{ 1087 /* Note that the ABI requires the called function's address to be 1088 loaded into T9, even if a direct branch is in range. */ 1089 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_T9, (uintptr_t)arg); 1090 1091 /* But do try a direct branch, allowing the cpu better insn prefetch. */ 1092 if (tail) { 1093 if (!tcg_out_opc_jmp(s, OPC_J, arg)) { 1094 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_T9, 0); 1095 } 1096 } else { 1097 if (!tcg_out_opc_jmp(s, OPC_JAL, arg)) { 1098 tcg_out_opc_reg(s, OPC_JALR, TCG_REG_RA, TCG_REG_T9, 0); 1099 } 1100 } 1101} 1102 1103static void tcg_out_call(TCGContext *s, tcg_insn_unit *arg) 1104{ 1105 tcg_out_call_int(s, arg, false); 1106 tcg_out_nop(s); 1107} 1108 1109#if defined(CONFIG_SOFTMMU) 1110#include "../tcg-ldst.c.inc" 1111 1112static void * const qemu_ld_helpers[16] = { 1113 [MO_UB] = helper_ret_ldub_mmu, 1114 [MO_SB] = helper_ret_ldsb_mmu, 1115 [MO_LEUW] = helper_le_lduw_mmu, 1116 [MO_LESW] = helper_le_ldsw_mmu, 1117 [MO_LEUL] = helper_le_ldul_mmu, 1118 [MO_LEQ] = helper_le_ldq_mmu, 1119 [MO_BEUW] = helper_be_lduw_mmu, 1120 [MO_BESW] = helper_be_ldsw_mmu, 1121 [MO_BEUL] = helper_be_ldul_mmu, 1122 [MO_BEQ] = helper_be_ldq_mmu, 1123#if TCG_TARGET_REG_BITS == 64 1124 [MO_LESL] = helper_le_ldsl_mmu, 1125 [MO_BESL] = helper_be_ldsl_mmu, 1126#endif 1127}; 1128 1129static void * const qemu_st_helpers[16] = { 1130 [MO_UB] = helper_ret_stb_mmu, 1131 [MO_LEUW] = helper_le_stw_mmu, 1132 [MO_LEUL] = helper_le_stl_mmu, 1133 [MO_LEQ] = helper_le_stq_mmu, 1134 [MO_BEUW] = helper_be_stw_mmu, 1135 [MO_BEUL] = helper_be_stl_mmu, 1136 [MO_BEQ] = helper_be_stq_mmu, 1137}; 1138 1139/* Helper routines for marshalling helper function arguments into 1140 * the correct registers and stack. 1141 * I is where we want to put this argument, and is updated and returned 1142 * for the next call. ARG is the argument itself. 1143 * 1144 * We provide routines for arguments which are: immediate, 32 bit 1145 * value in register, 16 and 8 bit values in register (which must be zero 1146 * extended before use) and 64 bit value in a lo:hi register pair. 1147 */ 1148 1149static int tcg_out_call_iarg_reg(TCGContext *s, int i, TCGReg arg) 1150{ 1151 if (i < ARRAY_SIZE(tcg_target_call_iarg_regs)) { 1152 tcg_out_mov(s, TCG_TYPE_REG, tcg_target_call_iarg_regs[i], arg); 1153 } else { 1154 /* For N32 and N64, the initial offset is different. But there 1155 we also have 8 argument register so we don't run out here. */ 1156 tcg_debug_assert(TCG_TARGET_REG_BITS == 32); 1157 tcg_out_st(s, TCG_TYPE_REG, arg, TCG_REG_SP, 4 * i); 1158 } 1159 return i + 1; 1160} 1161 1162static int tcg_out_call_iarg_reg8(TCGContext *s, int i, TCGReg arg) 1163{ 1164 TCGReg tmp = TCG_TMP0; 1165 if (i < ARRAY_SIZE(tcg_target_call_iarg_regs)) { 1166 tmp = tcg_target_call_iarg_regs[i]; 1167 } 1168 tcg_out_opc_imm(s, OPC_ANDI, tmp, arg, 0xff); 1169 return tcg_out_call_iarg_reg(s, i, tmp); 1170} 1171 1172static int tcg_out_call_iarg_reg16(TCGContext *s, int i, TCGReg arg) 1173{ 1174 TCGReg tmp = TCG_TMP0; 1175 if (i < ARRAY_SIZE(tcg_target_call_iarg_regs)) { 1176 tmp = tcg_target_call_iarg_regs[i]; 1177 } 1178 tcg_out_opc_imm(s, OPC_ANDI, tmp, arg, 0xffff); 1179 return tcg_out_call_iarg_reg(s, i, tmp); 1180} 1181 1182static int tcg_out_call_iarg_imm(TCGContext *s, int i, TCGArg arg) 1183{ 1184 TCGReg tmp = TCG_TMP0; 1185 if (arg == 0) { 1186 tmp = TCG_REG_ZERO; 1187 } else { 1188 if (i < ARRAY_SIZE(tcg_target_call_iarg_regs)) { 1189 tmp = tcg_target_call_iarg_regs[i]; 1190 } 1191 tcg_out_movi(s, TCG_TYPE_REG, tmp, arg); 1192 } 1193 return tcg_out_call_iarg_reg(s, i, tmp); 1194} 1195 1196static int tcg_out_call_iarg_reg2(TCGContext *s, int i, TCGReg al, TCGReg ah) 1197{ 1198 tcg_debug_assert(TCG_TARGET_REG_BITS == 32); 1199 i = (i + 1) & ~1; 1200 i = tcg_out_call_iarg_reg(s, i, (MIPS_BE ? ah : al)); 1201 i = tcg_out_call_iarg_reg(s, i, (MIPS_BE ? al : ah)); 1202 return i; 1203} 1204 1205/* We expect to use a 16-bit negative offset from ENV. */ 1206QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0); 1207QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -32768); 1208 1209/* 1210 * Perform the tlb comparison operation. 1211 * The complete host address is placed in BASE. 1212 * Clobbers TMP0, TMP1, TMP2, TMP3. 1213 */ 1214static void tcg_out_tlb_load(TCGContext *s, TCGReg base, TCGReg addrl, 1215 TCGReg addrh, TCGMemOpIdx oi, 1216 tcg_insn_unit *label_ptr[2], bool is_load) 1217{ 1218 MemOp opc = get_memop(oi); 1219 unsigned s_bits = opc & MO_SIZE; 1220 unsigned a_bits = get_alignment_bits(opc); 1221 int mem_index = get_mmuidx(oi); 1222 int fast_off = TLB_MASK_TABLE_OFS(mem_index); 1223 int mask_off = fast_off + offsetof(CPUTLBDescFast, mask); 1224 int table_off = fast_off + offsetof(CPUTLBDescFast, table); 1225 int add_off = offsetof(CPUTLBEntry, addend); 1226 int cmp_off = (is_load ? offsetof(CPUTLBEntry, addr_read) 1227 : offsetof(CPUTLBEntry, addr_write)); 1228 target_ulong mask; 1229 1230 /* Load tlb_mask[mmu_idx] and tlb_table[mmu_idx]. */ 1231 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP0, TCG_AREG0, mask_off); 1232 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP1, TCG_AREG0, table_off); 1233 1234 /* Extract the TLB index from the address into TMP3. */ 1235 tcg_out_opc_sa(s, ALIAS_TSRL, TCG_TMP3, addrl, 1236 TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); 1237 tcg_out_opc_reg(s, OPC_AND, TCG_TMP3, TCG_TMP3, TCG_TMP0); 1238 1239 /* Add the tlb_table pointer, creating the CPUTLBEntry address in TMP3. */ 1240 tcg_out_opc_reg(s, ALIAS_PADD, TCG_TMP3, TCG_TMP3, TCG_TMP1); 1241 1242 /* We don't currently support unaligned accesses. 1243 We could do so with mips32r6. */ 1244 if (a_bits < s_bits) { 1245 a_bits = s_bits; 1246 } 1247 1248 /* Mask the page bits, keeping the alignment bits to compare against. */ 1249 mask = (target_ulong)TARGET_PAGE_MASK | ((1 << a_bits) - 1); 1250 1251 /* Load the (low-half) tlb comparator. */ 1252 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1253 tcg_out_ld(s, TCG_TYPE_I32, TCG_TMP0, TCG_TMP3, cmp_off + LO_OFF); 1254 tcg_out_movi(s, TCG_TYPE_I32, TCG_TMP1, mask); 1255 } else { 1256 tcg_out_ldst(s, (TARGET_LONG_BITS == 64 ? OPC_LD 1257 : TCG_TARGET_REG_BITS == 64 ? OPC_LWU : OPC_LW), 1258 TCG_TMP0, TCG_TMP3, cmp_off); 1259 tcg_out_movi(s, TCG_TYPE_TL, TCG_TMP1, mask); 1260 /* No second compare is required here; 1261 load the tlb addend for the fast path. */ 1262 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP2, TCG_TMP3, add_off); 1263 } 1264 tcg_out_opc_reg(s, OPC_AND, TCG_TMP1, TCG_TMP1, addrl); 1265 1266 /* Zero extend a 32-bit guest address for a 64-bit host. */ 1267 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { 1268 tcg_out_ext32u(s, base, addrl); 1269 addrl = base; 1270 } 1271 1272 label_ptr[0] = s->code_ptr; 1273 tcg_out_opc_br(s, OPC_BNE, TCG_TMP1, TCG_TMP0); 1274 1275 /* Load and test the high half tlb comparator. */ 1276 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1277 /* delay slot */ 1278 tcg_out_ld(s, TCG_TYPE_I32, TCG_TMP0, TCG_TMP3, cmp_off + HI_OFF); 1279 1280 /* Load the tlb addend for the fast path. */ 1281 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP2, TCG_TMP3, add_off); 1282 1283 label_ptr[1] = s->code_ptr; 1284 tcg_out_opc_br(s, OPC_BNE, addrh, TCG_TMP0); 1285 } 1286 1287 /* delay slot */ 1288 tcg_out_opc_reg(s, ALIAS_PADD, base, TCG_TMP2, addrl); 1289} 1290 1291static void add_qemu_ldst_label(TCGContext *s, int is_ld, TCGMemOpIdx oi, 1292 TCGType ext, 1293 TCGReg datalo, TCGReg datahi, 1294 TCGReg addrlo, TCGReg addrhi, 1295 void *raddr, tcg_insn_unit *label_ptr[2]) 1296{ 1297 TCGLabelQemuLdst *label = new_ldst_label(s); 1298 1299 label->is_ld = is_ld; 1300 label->oi = oi; 1301 label->type = ext; 1302 label->datalo_reg = datalo; 1303 label->datahi_reg = datahi; 1304 label->addrlo_reg = addrlo; 1305 label->addrhi_reg = addrhi; 1306 label->raddr = raddr; 1307 label->label_ptr[0] = label_ptr[0]; 1308 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1309 label->label_ptr[1] = label_ptr[1]; 1310 } 1311} 1312 1313static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l) 1314{ 1315 TCGMemOpIdx oi = l->oi; 1316 MemOp opc = get_memop(oi); 1317 TCGReg v0; 1318 int i; 1319 1320 /* resolve label address */ 1321 reloc_pc16(l->label_ptr[0], s->code_ptr); 1322 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1323 reloc_pc16(l->label_ptr[1], s->code_ptr); 1324 } 1325 1326 i = 1; 1327 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1328 i = tcg_out_call_iarg_reg2(s, i, l->addrlo_reg, l->addrhi_reg); 1329 } else { 1330 i = tcg_out_call_iarg_reg(s, i, l->addrlo_reg); 1331 } 1332 i = tcg_out_call_iarg_imm(s, i, oi); 1333 i = tcg_out_call_iarg_imm(s, i, (intptr_t)l->raddr); 1334 tcg_out_call_int(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)], false); 1335 /* delay slot */ 1336 tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0); 1337 1338 v0 = l->datalo_reg; 1339 if (TCG_TARGET_REG_BITS == 32 && (opc & MO_SIZE) == MO_64) { 1340 /* We eliminated V0 from the possible output registers, so it 1341 cannot be clobbered here. So we must move V1 first. */ 1342 if (MIPS_BE) { 1343 tcg_out_mov(s, TCG_TYPE_I32, v0, TCG_REG_V1); 1344 v0 = l->datahi_reg; 1345 } else { 1346 tcg_out_mov(s, TCG_TYPE_I32, l->datahi_reg, TCG_REG_V1); 1347 } 1348 } 1349 1350 tcg_out_opc_br(s, OPC_BEQ, TCG_REG_ZERO, TCG_REG_ZERO); 1351 reloc_pc16(s->code_ptr - 1, l->raddr); 1352 1353 /* delay slot */ 1354 if (TCG_TARGET_REG_BITS == 64 && l->type == TCG_TYPE_I32) { 1355 /* we always sign-extend 32-bit loads */ 1356 tcg_out_opc_sa(s, OPC_SLL, v0, TCG_REG_V0, 0); 1357 } else { 1358 tcg_out_opc_reg(s, OPC_OR, v0, TCG_REG_V0, TCG_REG_ZERO); 1359 } 1360 return true; 1361} 1362 1363static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) 1364{ 1365 TCGMemOpIdx oi = l->oi; 1366 MemOp opc = get_memop(oi); 1367 MemOp s_bits = opc & MO_SIZE; 1368 int i; 1369 1370 /* resolve label address */ 1371 reloc_pc16(l->label_ptr[0], s->code_ptr); 1372 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1373 reloc_pc16(l->label_ptr[1], s->code_ptr); 1374 } 1375 1376 i = 1; 1377 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1378 i = tcg_out_call_iarg_reg2(s, i, l->addrlo_reg, l->addrhi_reg); 1379 } else { 1380 i = tcg_out_call_iarg_reg(s, i, l->addrlo_reg); 1381 } 1382 switch (s_bits) { 1383 case MO_8: 1384 i = tcg_out_call_iarg_reg8(s, i, l->datalo_reg); 1385 break; 1386 case MO_16: 1387 i = tcg_out_call_iarg_reg16(s, i, l->datalo_reg); 1388 break; 1389 case MO_32: 1390 i = tcg_out_call_iarg_reg(s, i, l->datalo_reg); 1391 break; 1392 case MO_64: 1393 if (TCG_TARGET_REG_BITS == 32) { 1394 i = tcg_out_call_iarg_reg2(s, i, l->datalo_reg, l->datahi_reg); 1395 } else { 1396 i = tcg_out_call_iarg_reg(s, i, l->datalo_reg); 1397 } 1398 break; 1399 default: 1400 tcg_abort(); 1401 } 1402 i = tcg_out_call_iarg_imm(s, i, oi); 1403 1404 /* Tail call to the store helper. Thus force the return address 1405 computation to take place in the return address register. */ 1406 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_RA, (intptr_t)l->raddr); 1407 i = tcg_out_call_iarg_reg(s, i, TCG_REG_RA); 1408 tcg_out_call_int(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)], true); 1409 /* delay slot */ 1410 tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0); 1411 return true; 1412} 1413#endif 1414 1415static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg lo, TCGReg hi, 1416 TCGReg base, MemOp opc, bool is_64) 1417{ 1418 switch (opc & (MO_SSIZE | MO_BSWAP)) { 1419 case MO_UB: 1420 tcg_out_opc_imm(s, OPC_LBU, lo, base, 0); 1421 break; 1422 case MO_SB: 1423 tcg_out_opc_imm(s, OPC_LB, lo, base, 0); 1424 break; 1425 case MO_UW | MO_BSWAP: 1426 tcg_out_opc_imm(s, OPC_LHU, TCG_TMP1, base, 0); 1427 tcg_out_bswap16(s, lo, TCG_TMP1); 1428 break; 1429 case MO_UW: 1430 tcg_out_opc_imm(s, OPC_LHU, lo, base, 0); 1431 break; 1432 case MO_SW | MO_BSWAP: 1433 tcg_out_opc_imm(s, OPC_LHU, TCG_TMP1, base, 0); 1434 tcg_out_bswap16s(s, lo, TCG_TMP1); 1435 break; 1436 case MO_SW: 1437 tcg_out_opc_imm(s, OPC_LH, lo, base, 0); 1438 break; 1439 case MO_UL | MO_BSWAP: 1440 if (TCG_TARGET_REG_BITS == 64 && is_64) { 1441 if (use_mips32r2_instructions) { 1442 tcg_out_opc_imm(s, OPC_LWU, lo, base, 0); 1443 tcg_out_bswap32u(s, lo, lo); 1444 } else { 1445 tcg_out_bswap_subr(s, bswap32u_addr); 1446 /* delay slot */ 1447 tcg_out_opc_imm(s, OPC_LWU, TCG_TMP0, base, 0); 1448 tcg_out_mov(s, TCG_TYPE_I64, lo, TCG_TMP3); 1449 } 1450 break; 1451 } 1452 /* FALLTHRU */ 1453 case MO_SL | MO_BSWAP: 1454 if (use_mips32r2_instructions) { 1455 tcg_out_opc_imm(s, OPC_LW, lo, base, 0); 1456 tcg_out_bswap32(s, lo, lo); 1457 } else { 1458 tcg_out_bswap_subr(s, bswap32_addr); 1459 /* delay slot */ 1460 tcg_out_opc_imm(s, OPC_LW, TCG_TMP0, base, 0); 1461 tcg_out_mov(s, TCG_TYPE_I32, lo, TCG_TMP3); 1462 } 1463 break; 1464 case MO_UL: 1465 if (TCG_TARGET_REG_BITS == 64 && is_64) { 1466 tcg_out_opc_imm(s, OPC_LWU, lo, base, 0); 1467 break; 1468 } 1469 /* FALLTHRU */ 1470 case MO_SL: 1471 tcg_out_opc_imm(s, OPC_LW, lo, base, 0); 1472 break; 1473 case MO_Q | MO_BSWAP: 1474 if (TCG_TARGET_REG_BITS == 64) { 1475 if (use_mips32r2_instructions) { 1476 tcg_out_opc_imm(s, OPC_LD, lo, base, 0); 1477 tcg_out_bswap64(s, lo, lo); 1478 } else { 1479 tcg_out_bswap_subr(s, bswap64_addr); 1480 /* delay slot */ 1481 tcg_out_opc_imm(s, OPC_LD, TCG_TMP0, base, 0); 1482 tcg_out_mov(s, TCG_TYPE_I64, lo, TCG_TMP3); 1483 } 1484 } else if (use_mips32r2_instructions) { 1485 tcg_out_opc_imm(s, OPC_LW, TCG_TMP0, base, 0); 1486 tcg_out_opc_imm(s, OPC_LW, TCG_TMP1, base, 4); 1487 tcg_out_opc_reg(s, OPC_WSBH, TCG_TMP0, 0, TCG_TMP0); 1488 tcg_out_opc_reg(s, OPC_WSBH, TCG_TMP1, 0, TCG_TMP1); 1489 tcg_out_opc_sa(s, OPC_ROTR, MIPS_BE ? lo : hi, TCG_TMP0, 16); 1490 tcg_out_opc_sa(s, OPC_ROTR, MIPS_BE ? hi : lo, TCG_TMP1, 16); 1491 } else { 1492 tcg_out_bswap_subr(s, bswap32_addr); 1493 /* delay slot */ 1494 tcg_out_opc_imm(s, OPC_LW, TCG_TMP0, base, 0); 1495 tcg_out_opc_imm(s, OPC_LW, TCG_TMP0, base, 4); 1496 tcg_out_bswap_subr(s, bswap32_addr); 1497 /* delay slot */ 1498 tcg_out_mov(s, TCG_TYPE_I32, MIPS_BE ? lo : hi, TCG_TMP3); 1499 tcg_out_mov(s, TCG_TYPE_I32, MIPS_BE ? hi : lo, TCG_TMP3); 1500 } 1501 break; 1502 case MO_Q: 1503 /* Prefer to load from offset 0 first, but allow for overlap. */ 1504 if (TCG_TARGET_REG_BITS == 64) { 1505 tcg_out_opc_imm(s, OPC_LD, lo, base, 0); 1506 } else if (MIPS_BE ? hi != base : lo == base) { 1507 tcg_out_opc_imm(s, OPC_LW, hi, base, HI_OFF); 1508 tcg_out_opc_imm(s, OPC_LW, lo, base, LO_OFF); 1509 } else { 1510 tcg_out_opc_imm(s, OPC_LW, lo, base, LO_OFF); 1511 tcg_out_opc_imm(s, OPC_LW, hi, base, HI_OFF); 1512 } 1513 break; 1514 default: 1515 tcg_abort(); 1516 } 1517} 1518 1519static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64) 1520{ 1521 TCGReg addr_regl, addr_regh __attribute__((unused)); 1522 TCGReg data_regl, data_regh; 1523 TCGMemOpIdx oi; 1524 MemOp opc; 1525#if defined(CONFIG_SOFTMMU) 1526 tcg_insn_unit *label_ptr[2]; 1527#endif 1528 TCGReg base = TCG_REG_A0; 1529 1530 data_regl = *args++; 1531 data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0); 1532 addr_regl = *args++; 1533 addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0); 1534 oi = *args++; 1535 opc = get_memop(oi); 1536 1537#if defined(CONFIG_SOFTMMU) 1538 tcg_out_tlb_load(s, base, addr_regl, addr_regh, oi, label_ptr, 1); 1539 tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64); 1540 add_qemu_ldst_label(s, 1, oi, 1541 (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32), 1542 data_regl, data_regh, addr_regl, addr_regh, 1543 s->code_ptr, label_ptr); 1544#else 1545 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { 1546 tcg_out_ext32u(s, base, addr_regl); 1547 addr_regl = base; 1548 } 1549 if (guest_base == 0 && data_regl != addr_regl) { 1550 base = addr_regl; 1551 } else if (guest_base == (int16_t)guest_base) { 1552 tcg_out_opc_imm(s, ALIAS_PADDI, base, addr_regl, guest_base); 1553 } else { 1554 tcg_out_opc_reg(s, ALIAS_PADD, base, TCG_GUEST_BASE_REG, addr_regl); 1555 } 1556 tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64); 1557#endif 1558} 1559 1560static void tcg_out_qemu_st_direct(TCGContext *s, TCGReg lo, TCGReg hi, 1561 TCGReg base, MemOp opc) 1562{ 1563 /* Don't clutter the code below with checks to avoid bswapping ZERO. */ 1564 if ((lo | hi) == 0) { 1565 opc &= ~MO_BSWAP; 1566 } 1567 1568 switch (opc & (MO_SIZE | MO_BSWAP)) { 1569 case MO_8: 1570 tcg_out_opc_imm(s, OPC_SB, lo, base, 0); 1571 break; 1572 1573 case MO_16 | MO_BSWAP: 1574 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, lo, 0xffff); 1575 tcg_out_bswap16(s, TCG_TMP1, TCG_TMP1); 1576 lo = TCG_TMP1; 1577 /* FALLTHRU */ 1578 case MO_16: 1579 tcg_out_opc_imm(s, OPC_SH, lo, base, 0); 1580 break; 1581 1582 case MO_32 | MO_BSWAP: 1583 tcg_out_bswap32(s, TCG_TMP3, lo); 1584 lo = TCG_TMP3; 1585 /* FALLTHRU */ 1586 case MO_32: 1587 tcg_out_opc_imm(s, OPC_SW, lo, base, 0); 1588 break; 1589 1590 case MO_64 | MO_BSWAP: 1591 if (TCG_TARGET_REG_BITS == 64) { 1592 tcg_out_bswap64(s, TCG_TMP3, lo); 1593 tcg_out_opc_imm(s, OPC_SD, TCG_TMP3, base, 0); 1594 } else if (use_mips32r2_instructions) { 1595 tcg_out_opc_reg(s, OPC_WSBH, TCG_TMP0, 0, MIPS_BE ? lo : hi); 1596 tcg_out_opc_reg(s, OPC_WSBH, TCG_TMP1, 0, MIPS_BE ? hi : lo); 1597 tcg_out_opc_sa(s, OPC_ROTR, TCG_TMP0, TCG_TMP0, 16); 1598 tcg_out_opc_sa(s, OPC_ROTR, TCG_TMP1, TCG_TMP1, 16); 1599 tcg_out_opc_imm(s, OPC_SW, TCG_TMP0, base, 0); 1600 tcg_out_opc_imm(s, OPC_SW, TCG_TMP1, base, 4); 1601 } else { 1602 tcg_out_bswap32(s, TCG_TMP3, MIPS_BE ? lo : hi); 1603 tcg_out_opc_imm(s, OPC_SW, TCG_TMP3, base, 0); 1604 tcg_out_bswap32(s, TCG_TMP3, MIPS_BE ? hi : lo); 1605 tcg_out_opc_imm(s, OPC_SW, TCG_TMP3, base, 4); 1606 } 1607 break; 1608 case MO_64: 1609 if (TCG_TARGET_REG_BITS == 64) { 1610 tcg_out_opc_imm(s, OPC_SD, lo, base, 0); 1611 } else { 1612 tcg_out_opc_imm(s, OPC_SW, MIPS_BE ? hi : lo, base, 0); 1613 tcg_out_opc_imm(s, OPC_SW, MIPS_BE ? lo : hi, base, 4); 1614 } 1615 break; 1616 1617 default: 1618 tcg_abort(); 1619 } 1620} 1621 1622static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64) 1623{ 1624 TCGReg addr_regl, addr_regh __attribute__((unused)); 1625 TCGReg data_regl, data_regh; 1626 TCGMemOpIdx oi; 1627 MemOp opc; 1628#if defined(CONFIG_SOFTMMU) 1629 tcg_insn_unit *label_ptr[2]; 1630#endif 1631 TCGReg base = TCG_REG_A0; 1632 1633 data_regl = *args++; 1634 data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0); 1635 addr_regl = *args++; 1636 addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0); 1637 oi = *args++; 1638 opc = get_memop(oi); 1639 1640#if defined(CONFIG_SOFTMMU) 1641 tcg_out_tlb_load(s, base, addr_regl, addr_regh, oi, label_ptr, 0); 1642 tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc); 1643 add_qemu_ldst_label(s, 0, oi, 1644 (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32), 1645 data_regl, data_regh, addr_regl, addr_regh, 1646 s->code_ptr, label_ptr); 1647#else 1648 base = TCG_REG_A0; 1649 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { 1650 tcg_out_ext32u(s, base, addr_regl); 1651 addr_regl = base; 1652 } 1653 if (guest_base == 0) { 1654 base = addr_regl; 1655 } else if (guest_base == (int16_t)guest_base) { 1656 tcg_out_opc_imm(s, ALIAS_PADDI, base, addr_regl, guest_base); 1657 } else { 1658 tcg_out_opc_reg(s, ALIAS_PADD, base, TCG_GUEST_BASE_REG, addr_regl); 1659 } 1660 tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc); 1661#endif 1662} 1663 1664static void tcg_out_mb(TCGContext *s, TCGArg a0) 1665{ 1666 static const MIPSInsn sync[] = { 1667 /* Note that SYNC_MB is a slightly weaker than SYNC 0, 1668 as the former is an ordering barrier and the latter 1669 is a completion barrier. */ 1670 [0 ... TCG_MO_ALL] = OPC_SYNC_MB, 1671 [TCG_MO_LD_LD] = OPC_SYNC_RMB, 1672 [TCG_MO_ST_ST] = OPC_SYNC_WMB, 1673 [TCG_MO_LD_ST] = OPC_SYNC_RELEASE, 1674 [TCG_MO_LD_ST | TCG_MO_ST_ST] = OPC_SYNC_RELEASE, 1675 [TCG_MO_LD_ST | TCG_MO_LD_LD] = OPC_SYNC_ACQUIRE, 1676 }; 1677 tcg_out32(s, sync[a0 & TCG_MO_ALL]); 1678} 1679 1680static void tcg_out_clz(TCGContext *s, MIPSInsn opcv2, MIPSInsn opcv6, 1681 int width, TCGReg a0, TCGReg a1, TCGArg a2) 1682{ 1683 if (use_mips32r6_instructions) { 1684 if (a2 == width) { 1685 tcg_out_opc_reg(s, opcv6, a0, a1, 0); 1686 } else { 1687 tcg_out_opc_reg(s, opcv6, TCG_TMP0, a1, 0); 1688 tcg_out_movcond(s, TCG_COND_EQ, a0, a1, 0, a2, TCG_TMP0); 1689 } 1690 } else { 1691 if (a2 == width) { 1692 tcg_out_opc_reg(s, opcv2, a0, a1, a1); 1693 } else if (a0 == a2) { 1694 tcg_out_opc_reg(s, opcv2, TCG_TMP0, a1, a1); 1695 tcg_out_opc_reg(s, OPC_MOVN, a0, TCG_TMP0, a1); 1696 } else if (a0 != a1) { 1697 tcg_out_opc_reg(s, opcv2, a0, a1, a1); 1698 tcg_out_opc_reg(s, OPC_MOVZ, a0, a2, a1); 1699 } else { 1700 tcg_out_opc_reg(s, opcv2, TCG_TMP0, a1, a1); 1701 tcg_out_opc_reg(s, OPC_MOVZ, TCG_TMP0, a2, a1); 1702 tcg_out_mov(s, TCG_TYPE_REG, a0, TCG_TMP0); 1703 } 1704 } 1705} 1706 1707static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, 1708 const TCGArg *args, const int *const_args) 1709{ 1710 MIPSInsn i1, i2; 1711 TCGArg a0, a1, a2; 1712 int c2; 1713 1714 a0 = args[0]; 1715 a1 = args[1]; 1716 a2 = args[2]; 1717 c2 = const_args[2]; 1718 1719 switch (opc) { 1720 case INDEX_op_exit_tb: 1721 { 1722 TCGReg b0 = TCG_REG_ZERO; 1723 1724 a0 = (intptr_t)a0; 1725 if (a0 & ~0xffff) { 1726 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_V0, a0 & ~0xffff); 1727 b0 = TCG_REG_V0; 1728 } 1729 if (!tcg_out_opc_jmp(s, OPC_J, tb_ret_addr)) { 1730 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, 1731 (uintptr_t)tb_ret_addr); 1732 tcg_out_opc_reg(s, OPC_JR, 0, TCG_TMP0, 0); 1733 } 1734 tcg_out_opc_imm(s, OPC_ORI, TCG_REG_V0, b0, a0 & 0xffff); 1735 } 1736 break; 1737 case INDEX_op_goto_tb: 1738 if (s->tb_jmp_insn_offset) { 1739 /* direct jump method */ 1740 s->tb_jmp_insn_offset[a0] = tcg_current_code_size(s); 1741 /* Avoid clobbering the address during retranslation. */ 1742 tcg_out32(s, OPC_J | (*(uint32_t *)s->code_ptr & 0x3ffffff)); 1743 } else { 1744 /* indirect jump method */ 1745 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP0, TCG_REG_ZERO, 1746 (uintptr_t)(s->tb_jmp_target_addr + a0)); 1747 tcg_out_opc_reg(s, OPC_JR, 0, TCG_TMP0, 0); 1748 } 1749 tcg_out_nop(s); 1750 set_jmp_reset_offset(s, a0); 1751 break; 1752 case INDEX_op_goto_ptr: 1753 /* jmp to the given host address (could be epilogue) */ 1754 tcg_out_opc_reg(s, OPC_JR, 0, a0, 0); 1755 tcg_out_nop(s); 1756 break; 1757 case INDEX_op_br: 1758 tcg_out_brcond(s, TCG_COND_EQ, TCG_REG_ZERO, TCG_REG_ZERO, 1759 arg_label(a0)); 1760 break; 1761 1762 case INDEX_op_ld8u_i32: 1763 case INDEX_op_ld8u_i64: 1764 i1 = OPC_LBU; 1765 goto do_ldst; 1766 case INDEX_op_ld8s_i32: 1767 case INDEX_op_ld8s_i64: 1768 i1 = OPC_LB; 1769 goto do_ldst; 1770 case INDEX_op_ld16u_i32: 1771 case INDEX_op_ld16u_i64: 1772 i1 = OPC_LHU; 1773 goto do_ldst; 1774 case INDEX_op_ld16s_i32: 1775 case INDEX_op_ld16s_i64: 1776 i1 = OPC_LH; 1777 goto do_ldst; 1778 case INDEX_op_ld_i32: 1779 case INDEX_op_ld32s_i64: 1780 i1 = OPC_LW; 1781 goto do_ldst; 1782 case INDEX_op_ld32u_i64: 1783 i1 = OPC_LWU; 1784 goto do_ldst; 1785 case INDEX_op_ld_i64: 1786 i1 = OPC_LD; 1787 goto do_ldst; 1788 case INDEX_op_st8_i32: 1789 case INDEX_op_st8_i64: 1790 i1 = OPC_SB; 1791 goto do_ldst; 1792 case INDEX_op_st16_i32: 1793 case INDEX_op_st16_i64: 1794 i1 = OPC_SH; 1795 goto do_ldst; 1796 case INDEX_op_st_i32: 1797 case INDEX_op_st32_i64: 1798 i1 = OPC_SW; 1799 goto do_ldst; 1800 case INDEX_op_st_i64: 1801 i1 = OPC_SD; 1802 do_ldst: 1803 tcg_out_ldst(s, i1, a0, a1, a2); 1804 break; 1805 1806 case INDEX_op_add_i32: 1807 i1 = OPC_ADDU, i2 = OPC_ADDIU; 1808 goto do_binary; 1809 case INDEX_op_add_i64: 1810 i1 = OPC_DADDU, i2 = OPC_DADDIU; 1811 goto do_binary; 1812 case INDEX_op_or_i32: 1813 case INDEX_op_or_i64: 1814 i1 = OPC_OR, i2 = OPC_ORI; 1815 goto do_binary; 1816 case INDEX_op_xor_i32: 1817 case INDEX_op_xor_i64: 1818 i1 = OPC_XOR, i2 = OPC_XORI; 1819 do_binary: 1820 if (c2) { 1821 tcg_out_opc_imm(s, i2, a0, a1, a2); 1822 break; 1823 } 1824 do_binaryv: 1825 tcg_out_opc_reg(s, i1, a0, a1, a2); 1826 break; 1827 1828 case INDEX_op_sub_i32: 1829 i1 = OPC_SUBU, i2 = OPC_ADDIU; 1830 goto do_subtract; 1831 case INDEX_op_sub_i64: 1832 i1 = OPC_DSUBU, i2 = OPC_DADDIU; 1833 do_subtract: 1834 if (c2) { 1835 tcg_out_opc_imm(s, i2, a0, a1, -a2); 1836 break; 1837 } 1838 goto do_binaryv; 1839 case INDEX_op_and_i32: 1840 if (c2 && a2 != (uint16_t)a2) { 1841 int msb = ctz32(~a2) - 1; 1842 tcg_debug_assert(use_mips32r2_instructions); 1843 tcg_debug_assert(is_p2m1(a2)); 1844 tcg_out_opc_bf(s, OPC_EXT, a0, a1, msb, 0); 1845 break; 1846 } 1847 i1 = OPC_AND, i2 = OPC_ANDI; 1848 goto do_binary; 1849 case INDEX_op_and_i64: 1850 if (c2 && a2 != (uint16_t)a2) { 1851 int msb = ctz64(~a2) - 1; 1852 tcg_debug_assert(use_mips32r2_instructions); 1853 tcg_debug_assert(is_p2m1(a2)); 1854 tcg_out_opc_bf64(s, OPC_DEXT, OPC_DEXTM, OPC_DEXTU, a0, a1, msb, 0); 1855 break; 1856 } 1857 i1 = OPC_AND, i2 = OPC_ANDI; 1858 goto do_binary; 1859 case INDEX_op_nor_i32: 1860 case INDEX_op_nor_i64: 1861 i1 = OPC_NOR; 1862 goto do_binaryv; 1863 1864 case INDEX_op_mul_i32: 1865 if (use_mips32_instructions) { 1866 tcg_out_opc_reg(s, OPC_MUL, a0, a1, a2); 1867 break; 1868 } 1869 i1 = OPC_MULT, i2 = OPC_MFLO; 1870 goto do_hilo1; 1871 case INDEX_op_mulsh_i32: 1872 if (use_mips32r6_instructions) { 1873 tcg_out_opc_reg(s, OPC_MUH, a0, a1, a2); 1874 break; 1875 } 1876 i1 = OPC_MULT, i2 = OPC_MFHI; 1877 goto do_hilo1; 1878 case INDEX_op_muluh_i32: 1879 if (use_mips32r6_instructions) { 1880 tcg_out_opc_reg(s, OPC_MUHU, a0, a1, a2); 1881 break; 1882 } 1883 i1 = OPC_MULTU, i2 = OPC_MFHI; 1884 goto do_hilo1; 1885 case INDEX_op_div_i32: 1886 if (use_mips32r6_instructions) { 1887 tcg_out_opc_reg(s, OPC_DIV_R6, a0, a1, a2); 1888 break; 1889 } 1890 i1 = OPC_DIV, i2 = OPC_MFLO; 1891 goto do_hilo1; 1892 case INDEX_op_divu_i32: 1893 if (use_mips32r6_instructions) { 1894 tcg_out_opc_reg(s, OPC_DIVU_R6, a0, a1, a2); 1895 break; 1896 } 1897 i1 = OPC_DIVU, i2 = OPC_MFLO; 1898 goto do_hilo1; 1899 case INDEX_op_rem_i32: 1900 if (use_mips32r6_instructions) { 1901 tcg_out_opc_reg(s, OPC_MOD, a0, a1, a2); 1902 break; 1903 } 1904 i1 = OPC_DIV, i2 = OPC_MFHI; 1905 goto do_hilo1; 1906 case INDEX_op_remu_i32: 1907 if (use_mips32r6_instructions) { 1908 tcg_out_opc_reg(s, OPC_MODU, a0, a1, a2); 1909 break; 1910 } 1911 i1 = OPC_DIVU, i2 = OPC_MFHI; 1912 goto do_hilo1; 1913 case INDEX_op_mul_i64: 1914 if (use_mips32r6_instructions) { 1915 tcg_out_opc_reg(s, OPC_DMUL, a0, a1, a2); 1916 break; 1917 } 1918 i1 = OPC_DMULT, i2 = OPC_MFLO; 1919 goto do_hilo1; 1920 case INDEX_op_mulsh_i64: 1921 if (use_mips32r6_instructions) { 1922 tcg_out_opc_reg(s, OPC_DMUH, a0, a1, a2); 1923 break; 1924 } 1925 i1 = OPC_DMULT, i2 = OPC_MFHI; 1926 goto do_hilo1; 1927 case INDEX_op_muluh_i64: 1928 if (use_mips32r6_instructions) { 1929 tcg_out_opc_reg(s, OPC_DMUHU, a0, a1, a2); 1930 break; 1931 } 1932 i1 = OPC_DMULTU, i2 = OPC_MFHI; 1933 goto do_hilo1; 1934 case INDEX_op_div_i64: 1935 if (use_mips32r6_instructions) { 1936 tcg_out_opc_reg(s, OPC_DDIV_R6, a0, a1, a2); 1937 break; 1938 } 1939 i1 = OPC_DDIV, i2 = OPC_MFLO; 1940 goto do_hilo1; 1941 case INDEX_op_divu_i64: 1942 if (use_mips32r6_instructions) { 1943 tcg_out_opc_reg(s, OPC_DDIVU_R6, a0, a1, a2); 1944 break; 1945 } 1946 i1 = OPC_DDIVU, i2 = OPC_MFLO; 1947 goto do_hilo1; 1948 case INDEX_op_rem_i64: 1949 if (use_mips32r6_instructions) { 1950 tcg_out_opc_reg(s, OPC_DMOD, a0, a1, a2); 1951 break; 1952 } 1953 i1 = OPC_DDIV, i2 = OPC_MFHI; 1954 goto do_hilo1; 1955 case INDEX_op_remu_i64: 1956 if (use_mips32r6_instructions) { 1957 tcg_out_opc_reg(s, OPC_DMODU, a0, a1, a2); 1958 break; 1959 } 1960 i1 = OPC_DDIVU, i2 = OPC_MFHI; 1961 do_hilo1: 1962 tcg_out_opc_reg(s, i1, 0, a1, a2); 1963 tcg_out_opc_reg(s, i2, a0, 0, 0); 1964 break; 1965 1966 case INDEX_op_muls2_i32: 1967 i1 = OPC_MULT; 1968 goto do_hilo2; 1969 case INDEX_op_mulu2_i32: 1970 i1 = OPC_MULTU; 1971 goto do_hilo2; 1972 case INDEX_op_muls2_i64: 1973 i1 = OPC_DMULT; 1974 goto do_hilo2; 1975 case INDEX_op_mulu2_i64: 1976 i1 = OPC_DMULTU; 1977 do_hilo2: 1978 tcg_out_opc_reg(s, i1, 0, a2, args[3]); 1979 tcg_out_opc_reg(s, OPC_MFLO, a0, 0, 0); 1980 tcg_out_opc_reg(s, OPC_MFHI, a1, 0, 0); 1981 break; 1982 1983 case INDEX_op_not_i32: 1984 case INDEX_op_not_i64: 1985 i1 = OPC_NOR; 1986 goto do_unary; 1987 case INDEX_op_bswap16_i32: 1988 case INDEX_op_bswap16_i64: 1989 i1 = OPC_WSBH; 1990 goto do_unary; 1991 case INDEX_op_ext8s_i32: 1992 case INDEX_op_ext8s_i64: 1993 i1 = OPC_SEB; 1994 goto do_unary; 1995 case INDEX_op_ext16s_i32: 1996 case INDEX_op_ext16s_i64: 1997 i1 = OPC_SEH; 1998 do_unary: 1999 tcg_out_opc_reg(s, i1, a0, TCG_REG_ZERO, a1); 2000 break; 2001 2002 case INDEX_op_bswap32_i32: 2003 tcg_out_bswap32(s, a0, a1); 2004 break; 2005 case INDEX_op_bswap32_i64: 2006 tcg_out_bswap32u(s, a0, a1); 2007 break; 2008 case INDEX_op_bswap64_i64: 2009 tcg_out_bswap64(s, a0, a1); 2010 break; 2011 case INDEX_op_extrh_i64_i32: 2012 tcg_out_dsra(s, a0, a1, 32); 2013 break; 2014 case INDEX_op_ext32s_i64: 2015 case INDEX_op_ext_i32_i64: 2016 case INDEX_op_extrl_i64_i32: 2017 tcg_out_opc_sa(s, OPC_SLL, a0, a1, 0); 2018 break; 2019 case INDEX_op_ext32u_i64: 2020 case INDEX_op_extu_i32_i64: 2021 tcg_out_ext32u(s, a0, a1); 2022 break; 2023 2024 case INDEX_op_sar_i32: 2025 i1 = OPC_SRAV, i2 = OPC_SRA; 2026 goto do_shift; 2027 case INDEX_op_shl_i32: 2028 i1 = OPC_SLLV, i2 = OPC_SLL; 2029 goto do_shift; 2030 case INDEX_op_shr_i32: 2031 i1 = OPC_SRLV, i2 = OPC_SRL; 2032 goto do_shift; 2033 case INDEX_op_rotr_i32: 2034 i1 = OPC_ROTRV, i2 = OPC_ROTR; 2035 do_shift: 2036 if (c2) { 2037 tcg_out_opc_sa(s, i2, a0, a1, a2); 2038 break; 2039 } 2040 do_shiftv: 2041 tcg_out_opc_reg(s, i1, a0, a2, a1); 2042 break; 2043 case INDEX_op_rotl_i32: 2044 if (c2) { 2045 tcg_out_opc_sa(s, OPC_ROTR, a0, a1, 32 - a2); 2046 } else { 2047 tcg_out_opc_reg(s, OPC_SUBU, TCG_TMP0, TCG_REG_ZERO, a2); 2048 tcg_out_opc_reg(s, OPC_ROTRV, a0, TCG_TMP0, a1); 2049 } 2050 break; 2051 case INDEX_op_sar_i64: 2052 if (c2) { 2053 tcg_out_dsra(s, a0, a1, a2); 2054 break; 2055 } 2056 i1 = OPC_DSRAV; 2057 goto do_shiftv; 2058 case INDEX_op_shl_i64: 2059 if (c2) { 2060 tcg_out_dsll(s, a0, a1, a2); 2061 break; 2062 } 2063 i1 = OPC_DSLLV; 2064 goto do_shiftv; 2065 case INDEX_op_shr_i64: 2066 if (c2) { 2067 tcg_out_dsrl(s, a0, a1, a2); 2068 break; 2069 } 2070 i1 = OPC_DSRLV; 2071 goto do_shiftv; 2072 case INDEX_op_rotr_i64: 2073 if (c2) { 2074 tcg_out_opc_sa64(s, OPC_DROTR, OPC_DROTR32, a0, a1, a2); 2075 break; 2076 } 2077 i1 = OPC_DROTRV; 2078 goto do_shiftv; 2079 case INDEX_op_rotl_i64: 2080 if (c2) { 2081 tcg_out_opc_sa64(s, OPC_DROTR, OPC_DROTR32, a0, a1, 64 - a2); 2082 } else { 2083 tcg_out_opc_reg(s, OPC_DSUBU, TCG_TMP0, TCG_REG_ZERO, a2); 2084 tcg_out_opc_reg(s, OPC_DROTRV, a0, TCG_TMP0, a1); 2085 } 2086 break; 2087 2088 case INDEX_op_clz_i32: 2089 tcg_out_clz(s, OPC_CLZ, OPC_CLZ_R6, 32, a0, a1, a2); 2090 break; 2091 case INDEX_op_clz_i64: 2092 tcg_out_clz(s, OPC_DCLZ, OPC_DCLZ_R6, 64, a0, a1, a2); 2093 break; 2094 2095 case INDEX_op_deposit_i32: 2096 tcg_out_opc_bf(s, OPC_INS, a0, a2, args[3] + args[4] - 1, args[3]); 2097 break; 2098 case INDEX_op_deposit_i64: 2099 tcg_out_opc_bf64(s, OPC_DINS, OPC_DINSM, OPC_DINSU, a0, a2, 2100 args[3] + args[4] - 1, args[3]); 2101 break; 2102 case INDEX_op_extract_i32: 2103 tcg_out_opc_bf(s, OPC_EXT, a0, a1, args[3] - 1, a2); 2104 break; 2105 case INDEX_op_extract_i64: 2106 tcg_out_opc_bf64(s, OPC_DEXT, OPC_DEXTM, OPC_DEXTU, a0, a1, 2107 args[3] - 1, a2); 2108 break; 2109 2110 case INDEX_op_brcond_i32: 2111 case INDEX_op_brcond_i64: 2112 tcg_out_brcond(s, a2, a0, a1, arg_label(args[3])); 2113 break; 2114 case INDEX_op_brcond2_i32: 2115 tcg_out_brcond2(s, args[4], a0, a1, a2, args[3], arg_label(args[5])); 2116 break; 2117 2118 case INDEX_op_movcond_i32: 2119 case INDEX_op_movcond_i64: 2120 tcg_out_movcond(s, args[5], a0, a1, a2, args[3], args[4]); 2121 break; 2122 2123 case INDEX_op_setcond_i32: 2124 case INDEX_op_setcond_i64: 2125 tcg_out_setcond(s, args[3], a0, a1, a2); 2126 break; 2127 case INDEX_op_setcond2_i32: 2128 tcg_out_setcond2(s, args[5], a0, a1, a2, args[3], args[4]); 2129 break; 2130 2131 case INDEX_op_qemu_ld_i32: 2132 tcg_out_qemu_ld(s, args, false); 2133 break; 2134 case INDEX_op_qemu_ld_i64: 2135 tcg_out_qemu_ld(s, args, true); 2136 break; 2137 case INDEX_op_qemu_st_i32: 2138 tcg_out_qemu_st(s, args, false); 2139 break; 2140 case INDEX_op_qemu_st_i64: 2141 tcg_out_qemu_st(s, args, true); 2142 break; 2143 2144 case INDEX_op_add2_i32: 2145 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], 2146 const_args[4], const_args[5], false); 2147 break; 2148 case INDEX_op_sub2_i32: 2149 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], 2150 const_args[4], const_args[5], true); 2151 break; 2152 2153 case INDEX_op_mb: 2154 tcg_out_mb(s, a0); 2155 break; 2156 case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ 2157 case INDEX_op_mov_i64: 2158 case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */ 2159 case INDEX_op_movi_i64: 2160 case INDEX_op_call: /* Always emitted via tcg_out_call. */ 2161 default: 2162 tcg_abort(); 2163 } 2164} 2165 2166static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op) 2167{ 2168 static const TCGTargetOpDef r = { .args_ct_str = { "r" } }; 2169 static const TCGTargetOpDef r_r = { .args_ct_str = { "r", "r" } }; 2170 static const TCGTargetOpDef r_L = { .args_ct_str = { "r", "L" } }; 2171 static const TCGTargetOpDef rZ_r = { .args_ct_str = { "rZ", "r" } }; 2172 static const TCGTargetOpDef SZ_S = { .args_ct_str = { "SZ", "S" } }; 2173 static const TCGTargetOpDef rZ_rZ = { .args_ct_str = { "rZ", "rZ" } }; 2174 static const TCGTargetOpDef r_r_L = { .args_ct_str = { "r", "r", "L" } }; 2175 static const TCGTargetOpDef r_L_L = { .args_ct_str = { "r", "L", "L" } }; 2176 static const TCGTargetOpDef r_r_ri = { .args_ct_str = { "r", "r", "ri" } }; 2177 static const TCGTargetOpDef r_r_rI = { .args_ct_str = { "r", "r", "rI" } }; 2178 static const TCGTargetOpDef r_r_rJ = { .args_ct_str = { "r", "r", "rJ" } }; 2179 static const TCGTargetOpDef SZ_S_S = { .args_ct_str = { "SZ", "S", "S" } }; 2180 static const TCGTargetOpDef SZ_SZ_S 2181 = { .args_ct_str = { "SZ", "SZ", "S" } }; 2182 static const TCGTargetOpDef SZ_SZ_S_S 2183 = { .args_ct_str = { "SZ", "SZ", "S", "S" } }; 2184 static const TCGTargetOpDef r_rZ_rN 2185 = { .args_ct_str = { "r", "rZ", "rN" } }; 2186 static const TCGTargetOpDef r_rZ_rZ 2187 = { .args_ct_str = { "r", "rZ", "rZ" } }; 2188 static const TCGTargetOpDef r_r_rIK 2189 = { .args_ct_str = { "r", "r", "rIK" } }; 2190 static const TCGTargetOpDef r_r_rWZ 2191 = { .args_ct_str = { "r", "r", "rWZ" } }; 2192 static const TCGTargetOpDef r_r_r_r 2193 = { .args_ct_str = { "r", "r", "r", "r" } }; 2194 static const TCGTargetOpDef r_r_L_L 2195 = { .args_ct_str = { "r", "r", "L", "L" } }; 2196 static const TCGTargetOpDef dep 2197 = { .args_ct_str = { "r", "0", "rZ" } }; 2198 static const TCGTargetOpDef movc 2199 = { .args_ct_str = { "r", "rZ", "rZ", "rZ", "0" } }; 2200 static const TCGTargetOpDef movc_r6 2201 = { .args_ct_str = { "r", "rZ", "rZ", "rZ", "rZ" } }; 2202 static const TCGTargetOpDef add2 2203 = { .args_ct_str = { "r", "r", "rZ", "rZ", "rN", "rN" } }; 2204 static const TCGTargetOpDef br2 2205 = { .args_ct_str = { "rZ", "rZ", "rZ", "rZ" } }; 2206 static const TCGTargetOpDef setc2 2207 = { .args_ct_str = { "r", "rZ", "rZ", "rZ", "rZ" } }; 2208 2209 switch (op) { 2210 case INDEX_op_goto_ptr: 2211 return &r; 2212 2213 case INDEX_op_ld8u_i32: 2214 case INDEX_op_ld8s_i32: 2215 case INDEX_op_ld16u_i32: 2216 case INDEX_op_ld16s_i32: 2217 case INDEX_op_ld_i32: 2218 case INDEX_op_not_i32: 2219 case INDEX_op_bswap16_i32: 2220 case INDEX_op_bswap32_i32: 2221 case INDEX_op_ext8s_i32: 2222 case INDEX_op_ext16s_i32: 2223 case INDEX_op_extract_i32: 2224 case INDEX_op_ld8u_i64: 2225 case INDEX_op_ld8s_i64: 2226 case INDEX_op_ld16u_i64: 2227 case INDEX_op_ld16s_i64: 2228 case INDEX_op_ld32s_i64: 2229 case INDEX_op_ld32u_i64: 2230 case INDEX_op_ld_i64: 2231 case INDEX_op_not_i64: 2232 case INDEX_op_bswap16_i64: 2233 case INDEX_op_bswap32_i64: 2234 case INDEX_op_bswap64_i64: 2235 case INDEX_op_ext8s_i64: 2236 case INDEX_op_ext16s_i64: 2237 case INDEX_op_ext32s_i64: 2238 case INDEX_op_ext32u_i64: 2239 case INDEX_op_ext_i32_i64: 2240 case INDEX_op_extu_i32_i64: 2241 case INDEX_op_extrl_i64_i32: 2242 case INDEX_op_extrh_i64_i32: 2243 case INDEX_op_extract_i64: 2244 return &r_r; 2245 2246 case INDEX_op_st8_i32: 2247 case INDEX_op_st16_i32: 2248 case INDEX_op_st_i32: 2249 case INDEX_op_st8_i64: 2250 case INDEX_op_st16_i64: 2251 case INDEX_op_st32_i64: 2252 case INDEX_op_st_i64: 2253 return &rZ_r; 2254 2255 case INDEX_op_add_i32: 2256 case INDEX_op_add_i64: 2257 return &r_r_rJ; 2258 case INDEX_op_sub_i32: 2259 case INDEX_op_sub_i64: 2260 return &r_rZ_rN; 2261 case INDEX_op_mul_i32: 2262 case INDEX_op_mulsh_i32: 2263 case INDEX_op_muluh_i32: 2264 case INDEX_op_div_i32: 2265 case INDEX_op_divu_i32: 2266 case INDEX_op_rem_i32: 2267 case INDEX_op_remu_i32: 2268 case INDEX_op_nor_i32: 2269 case INDEX_op_setcond_i32: 2270 case INDEX_op_mul_i64: 2271 case INDEX_op_mulsh_i64: 2272 case INDEX_op_muluh_i64: 2273 case INDEX_op_div_i64: 2274 case INDEX_op_divu_i64: 2275 case INDEX_op_rem_i64: 2276 case INDEX_op_remu_i64: 2277 case INDEX_op_nor_i64: 2278 case INDEX_op_setcond_i64: 2279 return &r_rZ_rZ; 2280 case INDEX_op_muls2_i32: 2281 case INDEX_op_mulu2_i32: 2282 case INDEX_op_muls2_i64: 2283 case INDEX_op_mulu2_i64: 2284 return &r_r_r_r; 2285 case INDEX_op_and_i32: 2286 case INDEX_op_and_i64: 2287 return &r_r_rIK; 2288 case INDEX_op_or_i32: 2289 case INDEX_op_xor_i32: 2290 case INDEX_op_or_i64: 2291 case INDEX_op_xor_i64: 2292 return &r_r_rI; 2293 case INDEX_op_shl_i32: 2294 case INDEX_op_shr_i32: 2295 case INDEX_op_sar_i32: 2296 case INDEX_op_rotr_i32: 2297 case INDEX_op_rotl_i32: 2298 case INDEX_op_shl_i64: 2299 case INDEX_op_shr_i64: 2300 case INDEX_op_sar_i64: 2301 case INDEX_op_rotr_i64: 2302 case INDEX_op_rotl_i64: 2303 return &r_r_ri; 2304 case INDEX_op_clz_i32: 2305 case INDEX_op_clz_i64: 2306 return &r_r_rWZ; 2307 2308 case INDEX_op_deposit_i32: 2309 case INDEX_op_deposit_i64: 2310 return &dep; 2311 case INDEX_op_brcond_i32: 2312 case INDEX_op_brcond_i64: 2313 return &rZ_rZ; 2314 case INDEX_op_movcond_i32: 2315 case INDEX_op_movcond_i64: 2316 return use_mips32r6_instructions ? &movc_r6 : &movc; 2317 2318 case INDEX_op_add2_i32: 2319 case INDEX_op_sub2_i32: 2320 return &add2; 2321 case INDEX_op_setcond2_i32: 2322 return &setc2; 2323 case INDEX_op_brcond2_i32: 2324 return &br2; 2325 2326 case INDEX_op_qemu_ld_i32: 2327 return (TCG_TARGET_REG_BITS == 64 || TARGET_LONG_BITS == 32 2328 ? &r_L : &r_L_L); 2329 case INDEX_op_qemu_st_i32: 2330 return (TCG_TARGET_REG_BITS == 64 || TARGET_LONG_BITS == 32 2331 ? &SZ_S : &SZ_S_S); 2332 case INDEX_op_qemu_ld_i64: 2333 return (TCG_TARGET_REG_BITS == 64 ? &r_L 2334 : TARGET_LONG_BITS == 32 ? &r_r_L : &r_r_L_L); 2335 case INDEX_op_qemu_st_i64: 2336 return (TCG_TARGET_REG_BITS == 64 ? &SZ_S 2337 : TARGET_LONG_BITS == 32 ? &SZ_SZ_S : &SZ_SZ_S_S); 2338 2339 default: 2340 return NULL; 2341 } 2342} 2343 2344static const int tcg_target_callee_save_regs[] = { 2345 TCG_REG_S0, /* used for the global env (TCG_AREG0) */ 2346 TCG_REG_S1, 2347 TCG_REG_S2, 2348 TCG_REG_S3, 2349 TCG_REG_S4, 2350 TCG_REG_S5, 2351 TCG_REG_S6, 2352 TCG_REG_S7, 2353 TCG_REG_S8, 2354 TCG_REG_RA, /* should be last for ABI compliance */ 2355}; 2356 2357/* The Linux kernel doesn't provide any information about the available 2358 instruction set. Probe it using a signal handler. */ 2359 2360 2361#ifndef use_movnz_instructions 2362bool use_movnz_instructions = false; 2363#endif 2364 2365#ifndef use_mips32_instructions 2366bool use_mips32_instructions = false; 2367#endif 2368 2369#ifndef use_mips32r2_instructions 2370bool use_mips32r2_instructions = false; 2371#endif 2372 2373static volatile sig_atomic_t got_sigill; 2374 2375static void sigill_handler(int signo, siginfo_t *si, void *data) 2376{ 2377 /* Skip the faulty instruction */ 2378 ucontext_t *uc = (ucontext_t *)data; 2379 uc->uc_mcontext.pc += 4; 2380 2381 got_sigill = 1; 2382} 2383 2384static void tcg_target_detect_isa(void) 2385{ 2386 struct sigaction sa_old, sa_new; 2387 2388 memset(&sa_new, 0, sizeof(sa_new)); 2389 sa_new.sa_flags = SA_SIGINFO; 2390 sa_new.sa_sigaction = sigill_handler; 2391 sigaction(SIGILL, &sa_new, &sa_old); 2392 2393 /* Probe for movn/movz, necessary to implement movcond. */ 2394#ifndef use_movnz_instructions 2395 got_sigill = 0; 2396 asm volatile(".set push\n" 2397 ".set mips32\n" 2398 "movn $zero, $zero, $zero\n" 2399 "movz $zero, $zero, $zero\n" 2400 ".set pop\n" 2401 : : : ); 2402 use_movnz_instructions = !got_sigill; 2403#endif 2404 2405 /* Probe for MIPS32 instructions. As no subsetting is allowed 2406 by the specification, it is only necessary to probe for one 2407 of the instructions. */ 2408#ifndef use_mips32_instructions 2409 got_sigill = 0; 2410 asm volatile(".set push\n" 2411 ".set mips32\n" 2412 "mul $zero, $zero\n" 2413 ".set pop\n" 2414 : : : ); 2415 use_mips32_instructions = !got_sigill; 2416#endif 2417 2418 /* Probe for MIPS32r2 instructions if MIPS32 instructions are 2419 available. As no subsetting is allowed by the specification, 2420 it is only necessary to probe for one of the instructions. */ 2421#ifndef use_mips32r2_instructions 2422 if (use_mips32_instructions) { 2423 got_sigill = 0; 2424 asm volatile(".set push\n" 2425 ".set mips32r2\n" 2426 "seb $zero, $zero\n" 2427 ".set pop\n" 2428 : : : ); 2429 use_mips32r2_instructions = !got_sigill; 2430 } 2431#endif 2432 2433 sigaction(SIGILL, &sa_old, NULL); 2434} 2435 2436static tcg_insn_unit *align_code_ptr(TCGContext *s) 2437{ 2438 uintptr_t p = (uintptr_t)s->code_ptr; 2439 if (p & 15) { 2440 p = (p + 15) & -16; 2441 s->code_ptr = (void *)p; 2442 } 2443 return s->code_ptr; 2444} 2445 2446/* Stack frame parameters. */ 2447#define REG_SIZE (TCG_TARGET_REG_BITS / 8) 2448#define SAVE_SIZE ((int)ARRAY_SIZE(tcg_target_callee_save_regs) * REG_SIZE) 2449#define TEMP_SIZE (CPU_TEMP_BUF_NLONGS * (int)sizeof(long)) 2450 2451#define FRAME_SIZE ((TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE + SAVE_SIZE \ 2452 + TCG_TARGET_STACK_ALIGN - 1) \ 2453 & -TCG_TARGET_STACK_ALIGN) 2454#define SAVE_OFS (TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE) 2455 2456/* We're expecting to be able to use an immediate for frame allocation. */ 2457QEMU_BUILD_BUG_ON(FRAME_SIZE > 0x7fff); 2458 2459/* Generate global QEMU prologue and epilogue code */ 2460static void tcg_target_qemu_prologue(TCGContext *s) 2461{ 2462 int i; 2463 2464 tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, TEMP_SIZE); 2465 2466 /* TB prologue */ 2467 tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_SP, TCG_REG_SP, -FRAME_SIZE); 2468 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { 2469 tcg_out_st(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], 2470 TCG_REG_SP, SAVE_OFS + i * REG_SIZE); 2471 } 2472 2473#ifndef CONFIG_SOFTMMU 2474 if (guest_base) { 2475 tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base); 2476 tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG); 2477 } 2478#endif 2479 2480 /* Call generated code */ 2481 tcg_out_opc_reg(s, OPC_JR, 0, tcg_target_call_iarg_regs[1], 0); 2482 /* delay slot */ 2483 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); 2484 2485 /* 2486 * Return path for goto_ptr. Set return value to 0, a-la exit_tb, 2487 * and fall through to the rest of the epilogue. 2488 */ 2489 s->code_gen_epilogue = s->code_ptr; 2490 tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_V0, TCG_REG_ZERO); 2491 2492 /* TB epilogue */ 2493 tb_ret_addr = s->code_ptr; 2494 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { 2495 tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], 2496 TCG_REG_SP, SAVE_OFS + i * REG_SIZE); 2497 } 2498 2499 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2500 /* delay slot */ 2501 tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE); 2502 2503 if (use_mips32r2_instructions) { 2504 return; 2505 } 2506 2507 /* Bswap subroutines: Input in TCG_TMP0, output in TCG_TMP3; 2508 clobbers TCG_TMP1, TCG_TMP2. */ 2509 2510 /* 2511 * bswap32 -- 32-bit swap (signed result for mips64). a0 = abcd. 2512 */ 2513 bswap32_addr = align_code_ptr(s); 2514 /* t3 = (ssss)d000 */ 2515 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP3, TCG_TMP0, 24); 2516 /* t1 = 000a */ 2517 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP1, TCG_TMP0, 24); 2518 /* t2 = 00c0 */ 2519 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP0, 0xff00); 2520 /* t3 = d00a */ 2521 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2522 /* t1 = 0abc */ 2523 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP1, TCG_TMP0, 8); 2524 /* t2 = 0c00 */ 2525 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP2, TCG_TMP2, 8); 2526 /* t1 = 00b0 */ 2527 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2528 /* t3 = dc0a */ 2529 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2530 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2531 /* t3 = dcba -- delay slot */ 2532 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2533 2534 if (TCG_TARGET_REG_BITS == 32) { 2535 return; 2536 } 2537 2538 /* 2539 * bswap32u -- unsigned 32-bit swap. a0 = ....abcd. 2540 */ 2541 bswap32u_addr = align_code_ptr(s); 2542 /* t1 = (0000)000d */ 2543 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP0, 0xff); 2544 /* t3 = 000a */ 2545 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP3, TCG_TMP0, 24); 2546 /* t1 = (0000)d000 */ 2547 tcg_out_dsll(s, TCG_TMP1, TCG_TMP1, 24); 2548 /* t2 = 00c0 */ 2549 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP0, 0xff00); 2550 /* t3 = d00a */ 2551 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2552 /* t1 = 0abc */ 2553 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP1, TCG_TMP0, 8); 2554 /* t2 = 0c00 */ 2555 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP2, TCG_TMP2, 8); 2556 /* t1 = 00b0 */ 2557 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2558 /* t3 = dc0a */ 2559 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2560 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2561 /* t3 = dcba -- delay slot */ 2562 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2563 2564 /* 2565 * bswap64 -- 64-bit swap. a0 = abcdefgh 2566 */ 2567 bswap64_addr = align_code_ptr(s); 2568 /* t3 = h0000000 */ 2569 tcg_out_dsll(s, TCG_TMP3, TCG_TMP0, 56); 2570 /* t1 = 0000000a */ 2571 tcg_out_dsrl(s, TCG_TMP1, TCG_TMP0, 56); 2572 2573 /* t2 = 000000g0 */ 2574 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP0, 0xff00); 2575 /* t3 = h000000a */ 2576 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2577 /* t1 = 00000abc */ 2578 tcg_out_dsrl(s, TCG_TMP1, TCG_TMP0, 40); 2579 /* t2 = 0g000000 */ 2580 tcg_out_dsll(s, TCG_TMP2, TCG_TMP2, 40); 2581 /* t1 = 000000b0 */ 2582 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2583 2584 /* t3 = hg00000a */ 2585 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2586 /* t2 = 0000abcd */ 2587 tcg_out_dsrl(s, TCG_TMP2, TCG_TMP0, 32); 2588 /* t3 = hg0000ba */ 2589 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2590 2591 /* t1 = 000000c0 */ 2592 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP2, 0xff00); 2593 /* t2 = 0000000d */ 2594 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP2, 0x00ff); 2595 /* t1 = 00000c00 */ 2596 tcg_out_dsll(s, TCG_TMP1, TCG_TMP1, 8); 2597 /* t2 = 0000d000 */ 2598 tcg_out_dsll(s, TCG_TMP2, TCG_TMP2, 24); 2599 2600 /* t3 = hg000cba */ 2601 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2602 /* t1 = 00abcdef */ 2603 tcg_out_dsrl(s, TCG_TMP1, TCG_TMP0, 16); 2604 /* t3 = hg00dcba */ 2605 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2606 2607 /* t2 = 0000000f */ 2608 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP1, 0x00ff); 2609 /* t1 = 000000e0 */ 2610 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2611 /* t2 = 00f00000 */ 2612 tcg_out_dsll(s, TCG_TMP2, TCG_TMP2, 40); 2613 /* t1 = 000e0000 */ 2614 tcg_out_dsll(s, TCG_TMP1, TCG_TMP1, 24); 2615 2616 /* t3 = hgf0dcba */ 2617 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2618 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2619 /* t3 = hgfedcba -- delay slot */ 2620 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2621} 2622 2623static void tcg_target_init(TCGContext *s) 2624{ 2625 tcg_target_detect_isa(); 2626 tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffff; 2627 if (TCG_TARGET_REG_BITS == 64) { 2628 tcg_target_available_regs[TCG_TYPE_I64] = 0xffffffff; 2629 } 2630 2631 tcg_target_call_clobber_regs = 0; 2632 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_V0); 2633 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_V1); 2634 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A0); 2635 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A1); 2636 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A2); 2637 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A3); 2638 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T0); 2639 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T1); 2640 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T2); 2641 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T3); 2642 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T4); 2643 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T5); 2644 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T6); 2645 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T7); 2646 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T8); 2647 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T9); 2648 2649 s->reserved_regs = 0; 2650 tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO); /* zero register */ 2651 tcg_regset_set_reg(s->reserved_regs, TCG_REG_K0); /* kernel use only */ 2652 tcg_regset_set_reg(s->reserved_regs, TCG_REG_K1); /* kernel use only */ 2653 tcg_regset_set_reg(s->reserved_regs, TCG_TMP0); /* internal use */ 2654 tcg_regset_set_reg(s->reserved_regs, TCG_TMP1); /* internal use */ 2655 tcg_regset_set_reg(s->reserved_regs, TCG_TMP2); /* internal use */ 2656 tcg_regset_set_reg(s->reserved_regs, TCG_TMP3); /* internal use */ 2657 tcg_regset_set_reg(s->reserved_regs, TCG_REG_RA); /* return address */ 2658 tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP); /* stack pointer */ 2659 tcg_regset_set_reg(s->reserved_regs, TCG_REG_GP); /* global pointer */ 2660} 2661 2662void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, 2663 uintptr_t addr) 2664{ 2665 atomic_set((uint32_t *)jmp_addr, deposit32(OPC_J, 0, 26, addr >> 2)); 2666 flush_icache_range(jmp_addr, jmp_addr + 4); 2667} 2668 2669typedef struct { 2670 DebugFrameHeader h; 2671 uint8_t fde_def_cfa[4]; 2672 uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2]; 2673} DebugFrame; 2674 2675#define ELF_HOST_MACHINE EM_MIPS 2676/* GDB doesn't appear to require proper setting of ELF_HOST_FLAGS, 2677 which is good because they're really quite complicated for MIPS. */ 2678 2679static const DebugFrame debug_frame = { 2680 .h.cie.len = sizeof(DebugFrameCIE) - 4, /* length after .len member */ 2681 .h.cie.id = -1, 2682 .h.cie.version = 1, 2683 .h.cie.code_align = 1, 2684 .h.cie.data_align = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */ 2685 .h.cie.return_column = TCG_REG_RA, 2686 2687 /* Total FDE size does not include the "len" member. */ 2688 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), 2689 2690 .fde_def_cfa = { 2691 12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */ 2692 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ 2693 (FRAME_SIZE >> 7) 2694 }, 2695 .fde_reg_ofs = { 2696 0x80 + 16, 9, /* DW_CFA_offset, s0, -72 */ 2697 0x80 + 17, 8, /* DW_CFA_offset, s2, -64 */ 2698 0x80 + 18, 7, /* DW_CFA_offset, s3, -56 */ 2699 0x80 + 19, 6, /* DW_CFA_offset, s4, -48 */ 2700 0x80 + 20, 5, /* DW_CFA_offset, s5, -40 */ 2701 0x80 + 21, 4, /* DW_CFA_offset, s6, -32 */ 2702 0x80 + 22, 3, /* DW_CFA_offset, s7, -24 */ 2703 0x80 + 30, 2, /* DW_CFA_offset, s8, -16 */ 2704 0x80 + 31, 1, /* DW_CFA_offset, ra, -8 */ 2705 } 2706}; 2707 2708void tcg_register_jit(void *buf, size_t buf_size) 2709{ 2710 tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); 2711} 2712