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 const tcg_insn_unit *tb_ret_addr; 143static const tcg_insn_unit *bswap32_addr; 144static const tcg_insn_unit *bswap32u_addr; 145static const tcg_insn_unit *bswap64_addr; 146 147static bool reloc_pc16(tcg_insn_unit *src_rw, const tcg_insn_unit *target) 148{ 149 /* Let the compiler perform the right-shift as part of the arithmetic. */ 150 const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); 151 ptrdiff_t disp = target - (src_rx + 1); 152 if (disp == (int16_t)disp) { 153 *src_rw = deposit32(*src_rw, 0, 16, disp); 154 return true; 155 } 156 return false; 157} 158 159static bool patch_reloc(tcg_insn_unit *code_ptr, int type, 160 intptr_t value, intptr_t addend) 161{ 162 tcg_debug_assert(type == R_MIPS_PC16); 163 tcg_debug_assert(addend == 0); 164 return reloc_pc16(code_ptr, (const tcg_insn_unit *)value); 165} 166 167#define TCG_CT_CONST_ZERO 0x100 168#define TCG_CT_CONST_U16 0x200 /* Unsigned 16-bit: 0 - 0xffff. */ 169#define TCG_CT_CONST_S16 0x400 /* Signed 16-bit: -32768 - 32767 */ 170#define TCG_CT_CONST_P2M1 0x800 /* Power of 2 minus 1. */ 171#define TCG_CT_CONST_N16 0x1000 /* "Negatable" 16-bit: -32767 - 32767 */ 172#define TCG_CT_CONST_WSZ 0x2000 /* word size */ 173 174#define ALL_GENERAL_REGS 0xffffffffu 175#define NOA0_REGS (ALL_GENERAL_REGS & ~(1 << TCG_REG_A0)) 176 177#ifdef CONFIG_SOFTMMU 178#define ALL_QLOAD_REGS \ 179 (NOA0_REGS & ~((TCG_TARGET_REG_BITS < TARGET_LONG_BITS) << TCG_REG_A2)) 180#define ALL_QSTORE_REGS \ 181 (NOA0_REGS & ~(TCG_TARGET_REG_BITS < TARGET_LONG_BITS \ 182 ? (1 << TCG_REG_A2) | (1 << TCG_REG_A3) \ 183 : (1 << TCG_REG_A1))) 184#else 185#define ALL_QLOAD_REGS NOA0_REGS 186#define ALL_QSTORE_REGS NOA0_REGS 187#endif 188 189 190static bool is_p2m1(tcg_target_long val) 191{ 192 return val && ((val + 1) & val) == 0; 193} 194 195/* test if a constant matches the constraint */ 196static bool tcg_target_const_match(int64_t val, TCGType type, int ct) 197{ 198 if (ct & TCG_CT_CONST) { 199 return 1; 200 } else if ((ct & TCG_CT_CONST_ZERO) && val == 0) { 201 return 1; 202 } else if ((ct & TCG_CT_CONST_U16) && val == (uint16_t)val) { 203 return 1; 204 } else if ((ct & TCG_CT_CONST_S16) && val == (int16_t)val) { 205 return 1; 206 } else if ((ct & TCG_CT_CONST_N16) && val >= -32767 && val <= 32767) { 207 return 1; 208 } else if ((ct & TCG_CT_CONST_P2M1) 209 && use_mips32r2_instructions && is_p2m1(val)) { 210 return 1; 211 } else if ((ct & TCG_CT_CONST_WSZ) 212 && val == (type == TCG_TYPE_I32 ? 32 : 64)) { 213 return 1; 214 } 215 return 0; 216} 217 218/* instruction opcodes */ 219typedef enum { 220 OPC_J = 002 << 26, 221 OPC_JAL = 003 << 26, 222 OPC_BEQ = 004 << 26, 223 OPC_BNE = 005 << 26, 224 OPC_BLEZ = 006 << 26, 225 OPC_BGTZ = 007 << 26, 226 OPC_ADDIU = 011 << 26, 227 OPC_SLTI = 012 << 26, 228 OPC_SLTIU = 013 << 26, 229 OPC_ANDI = 014 << 26, 230 OPC_ORI = 015 << 26, 231 OPC_XORI = 016 << 26, 232 OPC_LUI = 017 << 26, 233 OPC_DADDIU = 031 << 26, 234 OPC_LB = 040 << 26, 235 OPC_LH = 041 << 26, 236 OPC_LW = 043 << 26, 237 OPC_LBU = 044 << 26, 238 OPC_LHU = 045 << 26, 239 OPC_LWU = 047 << 26, 240 OPC_SB = 050 << 26, 241 OPC_SH = 051 << 26, 242 OPC_SW = 053 << 26, 243 OPC_LD = 067 << 26, 244 OPC_SD = 077 << 26, 245 246 OPC_SPECIAL = 000 << 26, 247 OPC_SLL = OPC_SPECIAL | 000, 248 OPC_SRL = OPC_SPECIAL | 002, 249 OPC_ROTR = OPC_SPECIAL | 002 | (1 << 21), 250 OPC_SRA = OPC_SPECIAL | 003, 251 OPC_SLLV = OPC_SPECIAL | 004, 252 OPC_SRLV = OPC_SPECIAL | 006, 253 OPC_ROTRV = OPC_SPECIAL | 006 | 0100, 254 OPC_SRAV = OPC_SPECIAL | 007, 255 OPC_JR_R5 = OPC_SPECIAL | 010, 256 OPC_JALR = OPC_SPECIAL | 011, 257 OPC_MOVZ = OPC_SPECIAL | 012, 258 OPC_MOVN = OPC_SPECIAL | 013, 259 OPC_SYNC = OPC_SPECIAL | 017, 260 OPC_MFHI = OPC_SPECIAL | 020, 261 OPC_MFLO = OPC_SPECIAL | 022, 262 OPC_DSLLV = OPC_SPECIAL | 024, 263 OPC_DSRLV = OPC_SPECIAL | 026, 264 OPC_DROTRV = OPC_SPECIAL | 026 | 0100, 265 OPC_DSRAV = OPC_SPECIAL | 027, 266 OPC_MULT = OPC_SPECIAL | 030, 267 OPC_MUL_R6 = OPC_SPECIAL | 030 | 0200, 268 OPC_MUH = OPC_SPECIAL | 030 | 0300, 269 OPC_MULTU = OPC_SPECIAL | 031, 270 OPC_MULU = OPC_SPECIAL | 031 | 0200, 271 OPC_MUHU = OPC_SPECIAL | 031 | 0300, 272 OPC_DIV = OPC_SPECIAL | 032, 273 OPC_DIV_R6 = OPC_SPECIAL | 032 | 0200, 274 OPC_MOD = OPC_SPECIAL | 032 | 0300, 275 OPC_DIVU = OPC_SPECIAL | 033, 276 OPC_DIVU_R6 = OPC_SPECIAL | 033 | 0200, 277 OPC_MODU = OPC_SPECIAL | 033 | 0300, 278 OPC_DMULT = OPC_SPECIAL | 034, 279 OPC_DMUL = OPC_SPECIAL | 034 | 0200, 280 OPC_DMUH = OPC_SPECIAL | 034 | 0300, 281 OPC_DMULTU = OPC_SPECIAL | 035, 282 OPC_DMULU = OPC_SPECIAL | 035 | 0200, 283 OPC_DMUHU = OPC_SPECIAL | 035 | 0300, 284 OPC_DDIV = OPC_SPECIAL | 036, 285 OPC_DDIV_R6 = OPC_SPECIAL | 036 | 0200, 286 OPC_DMOD = OPC_SPECIAL | 036 | 0300, 287 OPC_DDIVU = OPC_SPECIAL | 037, 288 OPC_DDIVU_R6 = OPC_SPECIAL | 037 | 0200, 289 OPC_DMODU = OPC_SPECIAL | 037 | 0300, 290 OPC_ADDU = OPC_SPECIAL | 041, 291 OPC_SUBU = OPC_SPECIAL | 043, 292 OPC_AND = OPC_SPECIAL | 044, 293 OPC_OR = OPC_SPECIAL | 045, 294 OPC_XOR = OPC_SPECIAL | 046, 295 OPC_NOR = OPC_SPECIAL | 047, 296 OPC_SLT = OPC_SPECIAL | 052, 297 OPC_SLTU = OPC_SPECIAL | 053, 298 OPC_DADDU = OPC_SPECIAL | 055, 299 OPC_DSUBU = OPC_SPECIAL | 057, 300 OPC_SELEQZ = OPC_SPECIAL | 065, 301 OPC_SELNEZ = OPC_SPECIAL | 067, 302 OPC_DSLL = OPC_SPECIAL | 070, 303 OPC_DSRL = OPC_SPECIAL | 072, 304 OPC_DROTR = OPC_SPECIAL | 072 | (1 << 21), 305 OPC_DSRA = OPC_SPECIAL | 073, 306 OPC_DSLL32 = OPC_SPECIAL | 074, 307 OPC_DSRL32 = OPC_SPECIAL | 076, 308 OPC_DROTR32 = OPC_SPECIAL | 076 | (1 << 21), 309 OPC_DSRA32 = OPC_SPECIAL | 077, 310 OPC_CLZ_R6 = OPC_SPECIAL | 0120, 311 OPC_DCLZ_R6 = OPC_SPECIAL | 0122, 312 313 OPC_REGIMM = 001 << 26, 314 OPC_BLTZ = OPC_REGIMM | (000 << 16), 315 OPC_BGEZ = OPC_REGIMM | (001 << 16), 316 317 OPC_SPECIAL2 = 034 << 26, 318 OPC_MUL_R5 = OPC_SPECIAL2 | 002, 319 OPC_CLZ = OPC_SPECIAL2 | 040, 320 OPC_DCLZ = OPC_SPECIAL2 | 044, 321 322 OPC_SPECIAL3 = 037 << 26, 323 OPC_EXT = OPC_SPECIAL3 | 000, 324 OPC_DEXTM = OPC_SPECIAL3 | 001, 325 OPC_DEXTU = OPC_SPECIAL3 | 002, 326 OPC_DEXT = OPC_SPECIAL3 | 003, 327 OPC_INS = OPC_SPECIAL3 | 004, 328 OPC_DINSM = OPC_SPECIAL3 | 005, 329 OPC_DINSU = OPC_SPECIAL3 | 006, 330 OPC_DINS = OPC_SPECIAL3 | 007, 331 OPC_WSBH = OPC_SPECIAL3 | 00240, 332 OPC_DSBH = OPC_SPECIAL3 | 00244, 333 OPC_DSHD = OPC_SPECIAL3 | 00544, 334 OPC_SEB = OPC_SPECIAL3 | 02040, 335 OPC_SEH = OPC_SPECIAL3 | 03040, 336 337 /* MIPS r6 doesn't have JR, JALR should be used instead */ 338 OPC_JR = use_mips32r6_instructions ? OPC_JALR : OPC_JR_R5, 339 340 /* 341 * MIPS r6 replaces MUL with an alternative encoding which is 342 * backwards-compatible at the assembly level. 343 */ 344 OPC_MUL = use_mips32r6_instructions ? OPC_MUL_R6 : OPC_MUL_R5, 345 346 /* MIPS r6 introduced names for weaker variants of SYNC. These are 347 backward compatible to previous architecture revisions. */ 348 OPC_SYNC_WMB = OPC_SYNC | 0x04 << 6, 349 OPC_SYNC_MB = OPC_SYNC | 0x10 << 6, 350 OPC_SYNC_ACQUIRE = OPC_SYNC | 0x11 << 6, 351 OPC_SYNC_RELEASE = OPC_SYNC | 0x12 << 6, 352 OPC_SYNC_RMB = OPC_SYNC | 0x13 << 6, 353 354 /* Aliases for convenience. */ 355 ALIAS_PADD = sizeof(void *) == 4 ? OPC_ADDU : OPC_DADDU, 356 ALIAS_PADDI = sizeof(void *) == 4 ? OPC_ADDIU : OPC_DADDIU, 357 ALIAS_TSRL = TARGET_LONG_BITS == 32 || TCG_TARGET_REG_BITS == 32 358 ? OPC_SRL : OPC_DSRL, 359} MIPSInsn; 360 361/* 362 * Type reg 363 */ 364static void tcg_out_opc_reg(TCGContext *s, MIPSInsn opc, 365 TCGReg rd, TCGReg rs, TCGReg rt) 366{ 367 int32_t inst; 368 369 inst = opc; 370 inst |= (rs & 0x1F) << 21; 371 inst |= (rt & 0x1F) << 16; 372 inst |= (rd & 0x1F) << 11; 373 tcg_out32(s, inst); 374} 375 376/* 377 * Type immediate 378 */ 379static void tcg_out_opc_imm(TCGContext *s, MIPSInsn opc, 380 TCGReg rt, TCGReg rs, TCGArg imm) 381{ 382 int32_t inst; 383 384 inst = opc; 385 inst |= (rs & 0x1F) << 21; 386 inst |= (rt & 0x1F) << 16; 387 inst |= (imm & 0xffff); 388 tcg_out32(s, inst); 389} 390 391/* 392 * Type bitfield 393 */ 394static void tcg_out_opc_bf(TCGContext *s, MIPSInsn opc, TCGReg rt, 395 TCGReg rs, int msb, int lsb) 396{ 397 int32_t inst; 398 399 inst = opc; 400 inst |= (rs & 0x1F) << 21; 401 inst |= (rt & 0x1F) << 16; 402 inst |= (msb & 0x1F) << 11; 403 inst |= (lsb & 0x1F) << 6; 404 tcg_out32(s, inst); 405} 406 407static void tcg_out_opc_bf64(TCGContext *s, MIPSInsn opc, MIPSInsn opm, 408 MIPSInsn oph, TCGReg rt, TCGReg rs, 409 int msb, int lsb) 410{ 411 if (lsb >= 32) { 412 opc = oph; 413 msb -= 32; 414 lsb -= 32; 415 } else if (msb >= 32) { 416 opc = opm; 417 msb -= 32; 418 } 419 tcg_out_opc_bf(s, opc, rt, rs, msb, lsb); 420} 421 422/* 423 * Type branch 424 */ 425static void tcg_out_opc_br(TCGContext *s, MIPSInsn opc, TCGReg rt, TCGReg rs) 426{ 427 tcg_out_opc_imm(s, opc, rt, rs, 0); 428} 429 430/* 431 * Type sa 432 */ 433static void tcg_out_opc_sa(TCGContext *s, MIPSInsn opc, 434 TCGReg rd, TCGReg rt, TCGArg sa) 435{ 436 int32_t inst; 437 438 inst = opc; 439 inst |= (rt & 0x1F) << 16; 440 inst |= (rd & 0x1F) << 11; 441 inst |= (sa & 0x1F) << 6; 442 tcg_out32(s, inst); 443 444} 445 446static void tcg_out_opc_sa64(TCGContext *s, MIPSInsn opc1, MIPSInsn opc2, 447 TCGReg rd, TCGReg rt, TCGArg sa) 448{ 449 int32_t inst; 450 451 inst = (sa & 32 ? opc2 : opc1); 452 inst |= (rt & 0x1F) << 16; 453 inst |= (rd & 0x1F) << 11; 454 inst |= (sa & 0x1F) << 6; 455 tcg_out32(s, inst); 456} 457 458/* 459 * Type jump. 460 * Returns true if the branch was in range and the insn was emitted. 461 */ 462static bool tcg_out_opc_jmp(TCGContext *s, MIPSInsn opc, const void *target) 463{ 464 uintptr_t dest = (uintptr_t)target; 465 uintptr_t from = (uintptr_t)tcg_splitwx_to_rx(s->code_ptr) + 4; 466 int32_t inst; 467 468 /* The pc-region branch happens within the 256MB region of 469 the delay slot (thus the +4). */ 470 if ((from ^ dest) & -(1 << 28)) { 471 return false; 472 } 473 tcg_debug_assert((dest & 3) == 0); 474 475 inst = opc; 476 inst |= (dest >> 2) & 0x3ffffff; 477 tcg_out32(s, inst); 478 return true; 479} 480 481static void tcg_out_nop(TCGContext *s) 482{ 483 tcg_out32(s, 0); 484} 485 486static void tcg_out_dsll(TCGContext *s, TCGReg rd, TCGReg rt, TCGArg sa) 487{ 488 tcg_out_opc_sa64(s, OPC_DSLL, OPC_DSLL32, rd, rt, sa); 489} 490 491static void tcg_out_dsrl(TCGContext *s, TCGReg rd, TCGReg rt, TCGArg sa) 492{ 493 tcg_out_opc_sa64(s, OPC_DSRL, OPC_DSRL32, rd, rt, sa); 494} 495 496static void tcg_out_dsra(TCGContext *s, TCGReg rd, TCGReg rt, TCGArg sa) 497{ 498 tcg_out_opc_sa64(s, OPC_DSRA, OPC_DSRA32, rd, rt, sa); 499} 500 501static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg) 502{ 503 /* Simple reg-reg move, optimising out the 'do nothing' case */ 504 if (ret != arg) { 505 tcg_out_opc_reg(s, OPC_OR, ret, arg, TCG_REG_ZERO); 506 } 507 return true; 508} 509 510static void tcg_out_movi(TCGContext *s, TCGType type, 511 TCGReg ret, tcg_target_long arg) 512{ 513 if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) { 514 arg = (int32_t)arg; 515 } 516 if (arg == (int16_t)arg) { 517 tcg_out_opc_imm(s, OPC_ADDIU, ret, TCG_REG_ZERO, arg); 518 return; 519 } 520 if (arg == (uint16_t)arg) { 521 tcg_out_opc_imm(s, OPC_ORI, ret, TCG_REG_ZERO, arg); 522 return; 523 } 524 if (TCG_TARGET_REG_BITS == 32 || arg == (int32_t)arg) { 525 tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16); 526 } else { 527 tcg_out_movi(s, TCG_TYPE_I32, ret, arg >> 31 >> 1); 528 if (arg & 0xffff0000ull) { 529 tcg_out_dsll(s, ret, ret, 16); 530 tcg_out_opc_imm(s, OPC_ORI, ret, ret, arg >> 16); 531 tcg_out_dsll(s, ret, ret, 16); 532 } else { 533 tcg_out_dsll(s, ret, ret, 32); 534 } 535 } 536 if (arg & 0xffff) { 537 tcg_out_opc_imm(s, OPC_ORI, ret, ret, arg & 0xffff); 538 } 539} 540 541static void tcg_out_bswap16(TCGContext *s, TCGReg ret, TCGReg arg, int flags) 542{ 543 /* ret and arg can't be register tmp0 */ 544 tcg_debug_assert(ret != TCG_TMP0); 545 tcg_debug_assert(arg != TCG_TMP0); 546 547 /* With arg = abcd: */ 548 if (use_mips32r2_instructions) { 549 tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg); /* badc */ 550 if (flags & TCG_BSWAP_OS) { 551 tcg_out_opc_reg(s, OPC_SEH, ret, 0, ret); /* ssdc */ 552 } else if ((flags & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) { 553 tcg_out_opc_imm(s, OPC_ANDI, ret, ret, 0xffff); /* 00dc */ 554 } 555 return; 556 } 557 558 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP0, arg, 8); /* 0abc */ 559 if (!(flags & TCG_BSWAP_IZ)) { 560 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP0, TCG_TMP0, 0x00ff); /* 000c */ 561 } 562 if (flags & TCG_BSWAP_OS) { 563 tcg_out_opc_sa(s, OPC_SLL, ret, arg, 24); /* d000 */ 564 tcg_out_opc_sa(s, OPC_SRA, ret, ret, 16); /* ssd0 */ 565 } else { 566 tcg_out_opc_sa(s, OPC_SLL, ret, arg, 8); /* bcd0 */ 567 if (flags & TCG_BSWAP_OZ) { 568 tcg_out_opc_imm(s, OPC_ANDI, ret, ret, 0xff00); /* 00d0 */ 569 } 570 } 571 tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_TMP0); /* ssdc */ 572} 573 574static void tcg_out_bswap_subr(TCGContext *s, const tcg_insn_unit *sub) 575{ 576 if (!tcg_out_opc_jmp(s, OPC_JAL, sub)) { 577 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP1, (uintptr_t)sub); 578 tcg_out_opc_reg(s, OPC_JALR, TCG_REG_RA, TCG_TMP1, 0); 579 } 580} 581 582static void tcg_out_bswap32(TCGContext *s, TCGReg ret, TCGReg arg, int flags) 583{ 584 if (use_mips32r2_instructions) { 585 tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg); 586 tcg_out_opc_sa(s, OPC_ROTR, ret, ret, 16); 587 if (flags & TCG_BSWAP_OZ) { 588 tcg_out_opc_bf(s, OPC_DEXT, ret, ret, 31, 0); 589 } 590 } else { 591 if (flags & TCG_BSWAP_OZ) { 592 tcg_out_bswap_subr(s, bswap32u_addr); 593 } else { 594 tcg_out_bswap_subr(s, bswap32_addr); 595 } 596 /* delay slot -- never omit the insn, like tcg_out_mov might. */ 597 tcg_out_opc_reg(s, OPC_OR, TCG_TMP0, arg, TCG_REG_ZERO); 598 tcg_out_mov(s, TCG_TYPE_I32, ret, TCG_TMP3); 599 } 600} 601 602static void tcg_out_bswap64(TCGContext *s, TCGReg ret, TCGReg arg) 603{ 604 if (use_mips32r2_instructions) { 605 tcg_out_opc_reg(s, OPC_DSBH, ret, 0, arg); 606 tcg_out_opc_reg(s, OPC_DSHD, ret, 0, ret); 607 } else { 608 tcg_out_bswap_subr(s, bswap64_addr); 609 /* delay slot -- never omit the insn, like tcg_out_mov might. */ 610 tcg_out_opc_reg(s, OPC_OR, TCG_TMP0, arg, TCG_REG_ZERO); 611 tcg_out_mov(s, TCG_TYPE_I32, ret, TCG_TMP3); 612 } 613} 614 615static void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg) 616{ 617 if (use_mips32r2_instructions) { 618 tcg_out_opc_bf(s, OPC_DEXT, ret, arg, 31, 0); 619 } else { 620 tcg_out_dsll(s, ret, arg, 32); 621 tcg_out_dsrl(s, ret, ret, 32); 622 } 623} 624 625static void tcg_out_ldst(TCGContext *s, MIPSInsn opc, TCGReg data, 626 TCGReg addr, intptr_t ofs) 627{ 628 int16_t lo = ofs; 629 if (ofs != lo) { 630 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, ofs - lo); 631 if (addr != TCG_REG_ZERO) { 632 tcg_out_opc_reg(s, ALIAS_PADD, TCG_TMP0, TCG_TMP0, addr); 633 } 634 addr = TCG_TMP0; 635 } 636 tcg_out_opc_imm(s, opc, data, addr, lo); 637} 638 639static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, 640 TCGReg arg1, intptr_t arg2) 641{ 642 MIPSInsn opc = OPC_LD; 643 if (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32) { 644 opc = OPC_LW; 645 } 646 tcg_out_ldst(s, opc, arg, arg1, arg2); 647} 648 649static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, 650 TCGReg arg1, intptr_t arg2) 651{ 652 MIPSInsn opc = OPC_SD; 653 if (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32) { 654 opc = OPC_SW; 655 } 656 tcg_out_ldst(s, opc, arg, arg1, arg2); 657} 658 659static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, 660 TCGReg base, intptr_t ofs) 661{ 662 if (val == 0) { 663 tcg_out_st(s, type, TCG_REG_ZERO, base, ofs); 664 return true; 665 } 666 return false; 667} 668 669static void tcg_out_addsub2(TCGContext *s, TCGReg rl, TCGReg rh, TCGReg al, 670 TCGReg ah, TCGArg bl, TCGArg bh, bool cbl, 671 bool cbh, bool is_sub) 672{ 673 TCGReg th = TCG_TMP1; 674 675 /* If we have a negative constant such that negating it would 676 make the high part zero, we can (usually) eliminate one insn. */ 677 if (cbl && cbh && bh == -1 && bl != 0) { 678 bl = -bl; 679 bh = 0; 680 is_sub = !is_sub; 681 } 682 683 /* By operating on the high part first, we get to use the final 684 carry operation to move back from the temporary. */ 685 if (!cbh) { 686 tcg_out_opc_reg(s, (is_sub ? OPC_SUBU : OPC_ADDU), th, ah, bh); 687 } else if (bh != 0 || ah == rl) { 688 tcg_out_opc_imm(s, OPC_ADDIU, th, ah, (is_sub ? -bh : bh)); 689 } else { 690 th = ah; 691 } 692 693 /* Note that tcg optimization should eliminate the bl == 0 case. */ 694 if (is_sub) { 695 if (cbl) { 696 tcg_out_opc_imm(s, OPC_SLTIU, TCG_TMP0, al, bl); 697 tcg_out_opc_imm(s, OPC_ADDIU, rl, al, -bl); 698 } else { 699 tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, al, bl); 700 tcg_out_opc_reg(s, OPC_SUBU, rl, al, bl); 701 } 702 tcg_out_opc_reg(s, OPC_SUBU, rh, th, TCG_TMP0); 703 } else { 704 if (cbl) { 705 tcg_out_opc_imm(s, OPC_ADDIU, rl, al, bl); 706 tcg_out_opc_imm(s, OPC_SLTIU, TCG_TMP0, rl, bl); 707 } else if (rl == al && rl == bl) { 708 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP0, al, TCG_TARGET_REG_BITS - 1); 709 tcg_out_opc_reg(s, OPC_ADDU, rl, al, bl); 710 } else { 711 tcg_out_opc_reg(s, OPC_ADDU, rl, al, bl); 712 tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, rl, (rl == bl ? al : bl)); 713 } 714 tcg_out_opc_reg(s, OPC_ADDU, rh, th, TCG_TMP0); 715 } 716} 717 718/* Bit 0 set if inversion required; bit 1 set if swapping required. */ 719#define MIPS_CMP_INV 1 720#define MIPS_CMP_SWAP 2 721 722static const uint8_t mips_cmp_map[16] = { 723 [TCG_COND_LT] = 0, 724 [TCG_COND_LTU] = 0, 725 [TCG_COND_GE] = MIPS_CMP_INV, 726 [TCG_COND_GEU] = MIPS_CMP_INV, 727 [TCG_COND_LE] = MIPS_CMP_INV | MIPS_CMP_SWAP, 728 [TCG_COND_LEU] = MIPS_CMP_INV | MIPS_CMP_SWAP, 729 [TCG_COND_GT] = MIPS_CMP_SWAP, 730 [TCG_COND_GTU] = MIPS_CMP_SWAP, 731}; 732 733static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret, 734 TCGReg arg1, TCGReg arg2) 735{ 736 MIPSInsn s_opc = OPC_SLTU; 737 int cmp_map; 738 739 switch (cond) { 740 case TCG_COND_EQ: 741 if (arg2 != 0) { 742 tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); 743 arg1 = ret; 744 } 745 tcg_out_opc_imm(s, OPC_SLTIU, ret, arg1, 1); 746 break; 747 748 case TCG_COND_NE: 749 if (arg2 != 0) { 750 tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); 751 arg1 = ret; 752 } 753 tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, arg1); 754 break; 755 756 case TCG_COND_LT: 757 case TCG_COND_GE: 758 case TCG_COND_LE: 759 case TCG_COND_GT: 760 s_opc = OPC_SLT; 761 /* FALLTHRU */ 762 763 case TCG_COND_LTU: 764 case TCG_COND_GEU: 765 case TCG_COND_LEU: 766 case TCG_COND_GTU: 767 cmp_map = mips_cmp_map[cond]; 768 if (cmp_map & MIPS_CMP_SWAP) { 769 TCGReg t = arg1; 770 arg1 = arg2; 771 arg2 = t; 772 } 773 tcg_out_opc_reg(s, s_opc, ret, arg1, arg2); 774 if (cmp_map & MIPS_CMP_INV) { 775 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); 776 } 777 break; 778 779 default: 780 tcg_abort(); 781 break; 782 } 783} 784 785static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1, 786 TCGReg arg2, TCGLabel *l) 787{ 788 static const MIPSInsn b_zero[16] = { 789 [TCG_COND_LT] = OPC_BLTZ, 790 [TCG_COND_GT] = OPC_BGTZ, 791 [TCG_COND_LE] = OPC_BLEZ, 792 [TCG_COND_GE] = OPC_BGEZ, 793 }; 794 795 MIPSInsn s_opc = OPC_SLTU; 796 MIPSInsn b_opc; 797 int cmp_map; 798 799 switch (cond) { 800 case TCG_COND_EQ: 801 b_opc = OPC_BEQ; 802 break; 803 case TCG_COND_NE: 804 b_opc = OPC_BNE; 805 break; 806 807 case TCG_COND_LT: 808 case TCG_COND_GT: 809 case TCG_COND_LE: 810 case TCG_COND_GE: 811 if (arg2 == 0) { 812 b_opc = b_zero[cond]; 813 arg2 = arg1; 814 arg1 = 0; 815 break; 816 } 817 s_opc = OPC_SLT; 818 /* FALLTHRU */ 819 820 case TCG_COND_LTU: 821 case TCG_COND_GTU: 822 case TCG_COND_LEU: 823 case TCG_COND_GEU: 824 cmp_map = mips_cmp_map[cond]; 825 if (cmp_map & MIPS_CMP_SWAP) { 826 TCGReg t = arg1; 827 arg1 = arg2; 828 arg2 = t; 829 } 830 tcg_out_opc_reg(s, s_opc, TCG_TMP0, arg1, arg2); 831 b_opc = (cmp_map & MIPS_CMP_INV ? OPC_BEQ : OPC_BNE); 832 arg1 = TCG_TMP0; 833 arg2 = TCG_REG_ZERO; 834 break; 835 836 default: 837 tcg_abort(); 838 break; 839 } 840 841 tcg_out_opc_br(s, b_opc, arg1, arg2); 842 tcg_out_reloc(s, s->code_ptr - 1, R_MIPS_PC16, l, 0); 843 tcg_out_nop(s); 844} 845 846static TCGReg tcg_out_reduce_eq2(TCGContext *s, TCGReg tmp0, TCGReg tmp1, 847 TCGReg al, TCGReg ah, 848 TCGReg bl, TCGReg bh) 849{ 850 /* Merge highpart comparison into AH. */ 851 if (bh != 0) { 852 if (ah != 0) { 853 tcg_out_opc_reg(s, OPC_XOR, tmp0, ah, bh); 854 ah = tmp0; 855 } else { 856 ah = bh; 857 } 858 } 859 /* Merge lowpart comparison into AL. */ 860 if (bl != 0) { 861 if (al != 0) { 862 tcg_out_opc_reg(s, OPC_XOR, tmp1, al, bl); 863 al = tmp1; 864 } else { 865 al = bl; 866 } 867 } 868 /* Merge high and low part comparisons into AL. */ 869 if (ah != 0) { 870 if (al != 0) { 871 tcg_out_opc_reg(s, OPC_OR, tmp0, ah, al); 872 al = tmp0; 873 } else { 874 al = ah; 875 } 876 } 877 return al; 878} 879 880static void tcg_out_setcond2(TCGContext *s, TCGCond cond, TCGReg ret, 881 TCGReg al, TCGReg ah, TCGReg bl, TCGReg bh) 882{ 883 TCGReg tmp0 = TCG_TMP0; 884 TCGReg tmp1 = ret; 885 886 tcg_debug_assert(ret != TCG_TMP0); 887 if (ret == ah || ret == bh) { 888 tcg_debug_assert(ret != TCG_TMP1); 889 tmp1 = TCG_TMP1; 890 } 891 892 switch (cond) { 893 case TCG_COND_EQ: 894 case TCG_COND_NE: 895 tmp1 = tcg_out_reduce_eq2(s, tmp0, tmp1, al, ah, bl, bh); 896 tcg_out_setcond(s, cond, ret, tmp1, TCG_REG_ZERO); 897 break; 898 899 default: 900 tcg_out_setcond(s, TCG_COND_EQ, tmp0, ah, bh); 901 tcg_out_setcond(s, tcg_unsigned_cond(cond), tmp1, al, bl); 902 tcg_out_opc_reg(s, OPC_AND, tmp1, tmp1, tmp0); 903 tcg_out_setcond(s, tcg_high_cond(cond), tmp0, ah, bh); 904 tcg_out_opc_reg(s, OPC_OR, ret, tmp1, tmp0); 905 break; 906 } 907} 908 909static void tcg_out_brcond2(TCGContext *s, TCGCond cond, TCGReg al, TCGReg ah, 910 TCGReg bl, TCGReg bh, TCGLabel *l) 911{ 912 TCGCond b_cond = TCG_COND_NE; 913 TCGReg tmp = TCG_TMP1; 914 915 /* With branches, we emit between 4 and 9 insns with 2 or 3 branches. 916 With setcond, we emit between 3 and 10 insns and only 1 branch, 917 which ought to get better branch prediction. */ 918 switch (cond) { 919 case TCG_COND_EQ: 920 case TCG_COND_NE: 921 b_cond = cond; 922 tmp = tcg_out_reduce_eq2(s, TCG_TMP0, TCG_TMP1, al, ah, bl, bh); 923 break; 924 925 default: 926 /* Minimize code size by preferring a compare not requiring INV. */ 927 if (mips_cmp_map[cond] & MIPS_CMP_INV) { 928 cond = tcg_invert_cond(cond); 929 b_cond = TCG_COND_EQ; 930 } 931 tcg_out_setcond2(s, cond, tmp, al, ah, bl, bh); 932 break; 933 } 934 935 tcg_out_brcond(s, b_cond, tmp, TCG_REG_ZERO, l); 936} 937 938static void tcg_out_movcond(TCGContext *s, TCGCond cond, TCGReg ret, 939 TCGReg c1, TCGReg c2, TCGReg v1, TCGReg v2) 940{ 941 bool eqz = false; 942 943 /* If one of the values is zero, put it last to match SEL*Z instructions */ 944 if (use_mips32r6_instructions && v1 == 0) { 945 v1 = v2; 946 v2 = 0; 947 cond = tcg_invert_cond(cond); 948 } 949 950 switch (cond) { 951 case TCG_COND_EQ: 952 eqz = true; 953 /* FALLTHRU */ 954 case TCG_COND_NE: 955 if (c2 != 0) { 956 tcg_out_opc_reg(s, OPC_XOR, TCG_TMP0, c1, c2); 957 c1 = TCG_TMP0; 958 } 959 break; 960 961 default: 962 /* Minimize code size by preferring a compare not requiring INV. */ 963 if (mips_cmp_map[cond] & MIPS_CMP_INV) { 964 cond = tcg_invert_cond(cond); 965 eqz = true; 966 } 967 tcg_out_setcond(s, cond, TCG_TMP0, c1, c2); 968 c1 = TCG_TMP0; 969 break; 970 } 971 972 if (use_mips32r6_instructions) { 973 MIPSInsn m_opc_t = eqz ? OPC_SELEQZ : OPC_SELNEZ; 974 MIPSInsn m_opc_f = eqz ? OPC_SELNEZ : OPC_SELEQZ; 975 976 if (v2 != 0) { 977 tcg_out_opc_reg(s, m_opc_f, TCG_TMP1, v2, c1); 978 } 979 tcg_out_opc_reg(s, m_opc_t, ret, v1, c1); 980 if (v2 != 0) { 981 tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_TMP1); 982 } 983 } else { 984 MIPSInsn m_opc = eqz ? OPC_MOVZ : OPC_MOVN; 985 986 tcg_out_opc_reg(s, m_opc, ret, v1, c1); 987 988 /* This should be guaranteed via constraints */ 989 tcg_debug_assert(v2 == ret); 990 } 991} 992 993static void tcg_out_call_int(TCGContext *s, const tcg_insn_unit *arg, bool tail) 994{ 995 /* Note that the ABI requires the called function's address to be 996 loaded into T9, even if a direct branch is in range. */ 997 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_T9, (uintptr_t)arg); 998 999 /* But do try a direct branch, allowing the cpu better insn prefetch. */ 1000 if (tail) { 1001 if (!tcg_out_opc_jmp(s, OPC_J, arg)) { 1002 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_T9, 0); 1003 } 1004 } else { 1005 if (!tcg_out_opc_jmp(s, OPC_JAL, arg)) { 1006 tcg_out_opc_reg(s, OPC_JALR, TCG_REG_RA, TCG_REG_T9, 0); 1007 } 1008 } 1009} 1010 1011static void tcg_out_call(TCGContext *s, const tcg_insn_unit *arg) 1012{ 1013 tcg_out_call_int(s, arg, false); 1014 tcg_out_nop(s); 1015} 1016 1017#if defined(CONFIG_SOFTMMU) 1018#include "../tcg-ldst.c.inc" 1019 1020static void * const qemu_ld_helpers[16] = { 1021 [MO_UB] = helper_ret_ldub_mmu, 1022 [MO_SB] = helper_ret_ldsb_mmu, 1023 [MO_LEUW] = helper_le_lduw_mmu, 1024 [MO_LESW] = helper_le_ldsw_mmu, 1025 [MO_LEUL] = helper_le_ldul_mmu, 1026 [MO_LEQ] = helper_le_ldq_mmu, 1027 [MO_BEUW] = helper_be_lduw_mmu, 1028 [MO_BESW] = helper_be_ldsw_mmu, 1029 [MO_BEUL] = helper_be_ldul_mmu, 1030 [MO_BEQ] = helper_be_ldq_mmu, 1031#if TCG_TARGET_REG_BITS == 64 1032 [MO_LESL] = helper_le_ldsl_mmu, 1033 [MO_BESL] = helper_be_ldsl_mmu, 1034#endif 1035}; 1036 1037static void * const qemu_st_helpers[16] = { 1038 [MO_UB] = helper_ret_stb_mmu, 1039 [MO_LEUW] = helper_le_stw_mmu, 1040 [MO_LEUL] = helper_le_stl_mmu, 1041 [MO_LEQ] = helper_le_stq_mmu, 1042 [MO_BEUW] = helper_be_stw_mmu, 1043 [MO_BEUL] = helper_be_stl_mmu, 1044 [MO_BEQ] = helper_be_stq_mmu, 1045}; 1046 1047/* Helper routines for marshalling helper function arguments into 1048 * the correct registers and stack. 1049 * I is where we want to put this argument, and is updated and returned 1050 * for the next call. ARG is the argument itself. 1051 * 1052 * We provide routines for arguments which are: immediate, 32 bit 1053 * value in register, 16 and 8 bit values in register (which must be zero 1054 * extended before use) and 64 bit value in a lo:hi register pair. 1055 */ 1056 1057static int tcg_out_call_iarg_reg(TCGContext *s, int i, TCGReg arg) 1058{ 1059 if (i < ARRAY_SIZE(tcg_target_call_iarg_regs)) { 1060 tcg_out_mov(s, TCG_TYPE_REG, tcg_target_call_iarg_regs[i], arg); 1061 } else { 1062 /* For N32 and N64, the initial offset is different. But there 1063 we also have 8 argument register so we don't run out here. */ 1064 tcg_debug_assert(TCG_TARGET_REG_BITS == 32); 1065 tcg_out_st(s, TCG_TYPE_REG, arg, TCG_REG_SP, 4 * i); 1066 } 1067 return i + 1; 1068} 1069 1070static int tcg_out_call_iarg_reg8(TCGContext *s, int i, TCGReg arg) 1071{ 1072 TCGReg tmp = TCG_TMP0; 1073 if (i < ARRAY_SIZE(tcg_target_call_iarg_regs)) { 1074 tmp = tcg_target_call_iarg_regs[i]; 1075 } 1076 tcg_out_opc_imm(s, OPC_ANDI, tmp, arg, 0xff); 1077 return tcg_out_call_iarg_reg(s, i, tmp); 1078} 1079 1080static int tcg_out_call_iarg_reg16(TCGContext *s, int i, TCGReg arg) 1081{ 1082 TCGReg tmp = TCG_TMP0; 1083 if (i < ARRAY_SIZE(tcg_target_call_iarg_regs)) { 1084 tmp = tcg_target_call_iarg_regs[i]; 1085 } 1086 tcg_out_opc_imm(s, OPC_ANDI, tmp, arg, 0xffff); 1087 return tcg_out_call_iarg_reg(s, i, tmp); 1088} 1089 1090static int tcg_out_call_iarg_imm(TCGContext *s, int i, TCGArg arg) 1091{ 1092 TCGReg tmp = TCG_TMP0; 1093 if (arg == 0) { 1094 tmp = TCG_REG_ZERO; 1095 } else { 1096 if (i < ARRAY_SIZE(tcg_target_call_iarg_regs)) { 1097 tmp = tcg_target_call_iarg_regs[i]; 1098 } 1099 tcg_out_movi(s, TCG_TYPE_REG, tmp, arg); 1100 } 1101 return tcg_out_call_iarg_reg(s, i, tmp); 1102} 1103 1104static int tcg_out_call_iarg_reg2(TCGContext *s, int i, TCGReg al, TCGReg ah) 1105{ 1106 tcg_debug_assert(TCG_TARGET_REG_BITS == 32); 1107 i = (i + 1) & ~1; 1108 i = tcg_out_call_iarg_reg(s, i, (MIPS_BE ? ah : al)); 1109 i = tcg_out_call_iarg_reg(s, i, (MIPS_BE ? al : ah)); 1110 return i; 1111} 1112 1113/* We expect to use a 16-bit negative offset from ENV. */ 1114QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0); 1115QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -32768); 1116 1117/* 1118 * Perform the tlb comparison operation. 1119 * The complete host address is placed in BASE. 1120 * Clobbers TMP0, TMP1, TMP2, TMP3. 1121 */ 1122static void tcg_out_tlb_load(TCGContext *s, TCGReg base, TCGReg addrl, 1123 TCGReg addrh, TCGMemOpIdx oi, 1124 tcg_insn_unit *label_ptr[2], bool is_load) 1125{ 1126 MemOp opc = get_memop(oi); 1127 unsigned s_bits = opc & MO_SIZE; 1128 unsigned a_bits = get_alignment_bits(opc); 1129 int mem_index = get_mmuidx(oi); 1130 int fast_off = TLB_MASK_TABLE_OFS(mem_index); 1131 int mask_off = fast_off + offsetof(CPUTLBDescFast, mask); 1132 int table_off = fast_off + offsetof(CPUTLBDescFast, table); 1133 int add_off = offsetof(CPUTLBEntry, addend); 1134 int cmp_off = (is_load ? offsetof(CPUTLBEntry, addr_read) 1135 : offsetof(CPUTLBEntry, addr_write)); 1136 target_ulong mask; 1137 1138 /* Load tlb_mask[mmu_idx] and tlb_table[mmu_idx]. */ 1139 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP0, TCG_AREG0, mask_off); 1140 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP1, TCG_AREG0, table_off); 1141 1142 /* Extract the TLB index from the address into TMP3. */ 1143 tcg_out_opc_sa(s, ALIAS_TSRL, TCG_TMP3, addrl, 1144 TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); 1145 tcg_out_opc_reg(s, OPC_AND, TCG_TMP3, TCG_TMP3, TCG_TMP0); 1146 1147 /* Add the tlb_table pointer, creating the CPUTLBEntry address in TMP3. */ 1148 tcg_out_opc_reg(s, ALIAS_PADD, TCG_TMP3, TCG_TMP3, TCG_TMP1); 1149 1150 /* We don't currently support unaligned accesses. 1151 We could do so with mips32r6. */ 1152 if (a_bits < s_bits) { 1153 a_bits = s_bits; 1154 } 1155 1156 /* Mask the page bits, keeping the alignment bits to compare against. */ 1157 mask = (target_ulong)TARGET_PAGE_MASK | ((1 << a_bits) - 1); 1158 1159 /* Load the (low-half) tlb comparator. */ 1160 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1161 tcg_out_ld(s, TCG_TYPE_I32, TCG_TMP0, TCG_TMP3, cmp_off + LO_OFF); 1162 tcg_out_movi(s, TCG_TYPE_I32, TCG_TMP1, mask); 1163 } else { 1164 tcg_out_ldst(s, (TARGET_LONG_BITS == 64 ? OPC_LD 1165 : TCG_TARGET_REG_BITS == 64 ? OPC_LWU : OPC_LW), 1166 TCG_TMP0, TCG_TMP3, cmp_off); 1167 tcg_out_movi(s, TCG_TYPE_TL, TCG_TMP1, mask); 1168 /* No second compare is required here; 1169 load the tlb addend for the fast path. */ 1170 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP2, TCG_TMP3, add_off); 1171 } 1172 1173 /* Zero extend a 32-bit guest address for a 64-bit host. */ 1174 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { 1175 tcg_out_ext32u(s, base, addrl); 1176 addrl = base; 1177 } 1178 tcg_out_opc_reg(s, OPC_AND, TCG_TMP1, TCG_TMP1, addrl); 1179 1180 label_ptr[0] = s->code_ptr; 1181 tcg_out_opc_br(s, OPC_BNE, TCG_TMP1, TCG_TMP0); 1182 1183 /* Load and test the high half tlb comparator. */ 1184 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1185 /* delay slot */ 1186 tcg_out_ld(s, TCG_TYPE_I32, TCG_TMP0, TCG_TMP3, cmp_off + HI_OFF); 1187 1188 /* Load the tlb addend for the fast path. */ 1189 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP2, TCG_TMP3, add_off); 1190 1191 label_ptr[1] = s->code_ptr; 1192 tcg_out_opc_br(s, OPC_BNE, addrh, TCG_TMP0); 1193 } 1194 1195 /* delay slot */ 1196 tcg_out_opc_reg(s, ALIAS_PADD, base, TCG_TMP2, addrl); 1197} 1198 1199static void add_qemu_ldst_label(TCGContext *s, int is_ld, TCGMemOpIdx oi, 1200 TCGType ext, 1201 TCGReg datalo, TCGReg datahi, 1202 TCGReg addrlo, TCGReg addrhi, 1203 void *raddr, tcg_insn_unit *label_ptr[2]) 1204{ 1205 TCGLabelQemuLdst *label = new_ldst_label(s); 1206 1207 label->is_ld = is_ld; 1208 label->oi = oi; 1209 label->type = ext; 1210 label->datalo_reg = datalo; 1211 label->datahi_reg = datahi; 1212 label->addrlo_reg = addrlo; 1213 label->addrhi_reg = addrhi; 1214 label->raddr = tcg_splitwx_to_rx(raddr); 1215 label->label_ptr[0] = label_ptr[0]; 1216 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1217 label->label_ptr[1] = label_ptr[1]; 1218 } 1219} 1220 1221static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l) 1222{ 1223 const tcg_insn_unit *tgt_rx = tcg_splitwx_to_rx(s->code_ptr); 1224 TCGMemOpIdx oi = l->oi; 1225 MemOp opc = get_memop(oi); 1226 TCGReg v0; 1227 int i; 1228 1229 /* resolve label address */ 1230 if (!reloc_pc16(l->label_ptr[0], tgt_rx) 1231 || (TCG_TARGET_REG_BITS < TARGET_LONG_BITS 1232 && !reloc_pc16(l->label_ptr[1], tgt_rx))) { 1233 return false; 1234 } 1235 1236 i = 1; 1237 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1238 i = tcg_out_call_iarg_reg2(s, i, l->addrlo_reg, l->addrhi_reg); 1239 } else { 1240 i = tcg_out_call_iarg_reg(s, i, l->addrlo_reg); 1241 } 1242 i = tcg_out_call_iarg_imm(s, i, oi); 1243 i = tcg_out_call_iarg_imm(s, i, (intptr_t)l->raddr); 1244 tcg_out_call_int(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)], false); 1245 /* delay slot */ 1246 tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0); 1247 1248 v0 = l->datalo_reg; 1249 if (TCG_TARGET_REG_BITS == 32 && (opc & MO_SIZE) == MO_64) { 1250 /* We eliminated V0 from the possible output registers, so it 1251 cannot be clobbered here. So we must move V1 first. */ 1252 if (MIPS_BE) { 1253 tcg_out_mov(s, TCG_TYPE_I32, v0, TCG_REG_V1); 1254 v0 = l->datahi_reg; 1255 } else { 1256 tcg_out_mov(s, TCG_TYPE_I32, l->datahi_reg, TCG_REG_V1); 1257 } 1258 } 1259 1260 tcg_out_opc_br(s, OPC_BEQ, TCG_REG_ZERO, TCG_REG_ZERO); 1261 if (!reloc_pc16(s->code_ptr - 1, l->raddr)) { 1262 return false; 1263 } 1264 1265 /* delay slot */ 1266 if (TCG_TARGET_REG_BITS == 64 && l->type == TCG_TYPE_I32) { 1267 /* we always sign-extend 32-bit loads */ 1268 tcg_out_opc_sa(s, OPC_SLL, v0, TCG_REG_V0, 0); 1269 } else { 1270 tcg_out_opc_reg(s, OPC_OR, v0, TCG_REG_V0, TCG_REG_ZERO); 1271 } 1272 return true; 1273} 1274 1275static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) 1276{ 1277 const tcg_insn_unit *tgt_rx = tcg_splitwx_to_rx(s->code_ptr); 1278 TCGMemOpIdx oi = l->oi; 1279 MemOp opc = get_memop(oi); 1280 MemOp s_bits = opc & MO_SIZE; 1281 int i; 1282 1283 /* resolve label address */ 1284 if (!reloc_pc16(l->label_ptr[0], tgt_rx) 1285 || (TCG_TARGET_REG_BITS < TARGET_LONG_BITS 1286 && !reloc_pc16(l->label_ptr[1], tgt_rx))) { 1287 return false; 1288 } 1289 1290 i = 1; 1291 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { 1292 i = tcg_out_call_iarg_reg2(s, i, l->addrlo_reg, l->addrhi_reg); 1293 } else { 1294 i = tcg_out_call_iarg_reg(s, i, l->addrlo_reg); 1295 } 1296 switch (s_bits) { 1297 case MO_8: 1298 i = tcg_out_call_iarg_reg8(s, i, l->datalo_reg); 1299 break; 1300 case MO_16: 1301 i = tcg_out_call_iarg_reg16(s, i, l->datalo_reg); 1302 break; 1303 case MO_32: 1304 i = tcg_out_call_iarg_reg(s, i, l->datalo_reg); 1305 break; 1306 case MO_64: 1307 if (TCG_TARGET_REG_BITS == 32) { 1308 i = tcg_out_call_iarg_reg2(s, i, l->datalo_reg, l->datahi_reg); 1309 } else { 1310 i = tcg_out_call_iarg_reg(s, i, l->datalo_reg); 1311 } 1312 break; 1313 default: 1314 tcg_abort(); 1315 } 1316 i = tcg_out_call_iarg_imm(s, i, oi); 1317 1318 /* Tail call to the store helper. Thus force the return address 1319 computation to take place in the return address register. */ 1320 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_RA, (intptr_t)l->raddr); 1321 i = tcg_out_call_iarg_reg(s, i, TCG_REG_RA); 1322 tcg_out_call_int(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)], true); 1323 /* delay slot */ 1324 tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0); 1325 return true; 1326} 1327#endif 1328 1329static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg lo, TCGReg hi, 1330 TCGReg base, MemOp opc, bool is_64) 1331{ 1332 switch (opc & (MO_SSIZE | MO_BSWAP)) { 1333 case MO_UB: 1334 tcg_out_opc_imm(s, OPC_LBU, lo, base, 0); 1335 break; 1336 case MO_SB: 1337 tcg_out_opc_imm(s, OPC_LB, lo, base, 0); 1338 break; 1339 case MO_UW | MO_BSWAP: 1340 tcg_out_opc_imm(s, OPC_LHU, TCG_TMP1, base, 0); 1341 tcg_out_bswap16(s, lo, TCG_TMP1, TCG_BSWAP_IZ | TCG_BSWAP_OZ); 1342 break; 1343 case MO_UW: 1344 tcg_out_opc_imm(s, OPC_LHU, lo, base, 0); 1345 break; 1346 case MO_SW | MO_BSWAP: 1347 tcg_out_opc_imm(s, OPC_LHU, TCG_TMP1, base, 0); 1348 tcg_out_bswap16(s, lo, TCG_TMP1, TCG_BSWAP_IZ | TCG_BSWAP_OS); 1349 break; 1350 case MO_SW: 1351 tcg_out_opc_imm(s, OPC_LH, lo, base, 0); 1352 break; 1353 case MO_UL | MO_BSWAP: 1354 if (TCG_TARGET_REG_BITS == 64 && is_64) { 1355 if (use_mips32r2_instructions) { 1356 tcg_out_opc_imm(s, OPC_LWU, lo, base, 0); 1357 tcg_out_bswap32(s, lo, lo, TCG_BSWAP_IZ | TCG_BSWAP_OZ); 1358 } else { 1359 tcg_out_bswap_subr(s, bswap32u_addr); 1360 /* delay slot */ 1361 tcg_out_opc_imm(s, OPC_LWU, TCG_TMP0, base, 0); 1362 tcg_out_mov(s, TCG_TYPE_I64, lo, TCG_TMP3); 1363 } 1364 break; 1365 } 1366 /* FALLTHRU */ 1367 case MO_SL | MO_BSWAP: 1368 if (use_mips32r2_instructions) { 1369 tcg_out_opc_imm(s, OPC_LW, lo, base, 0); 1370 tcg_out_bswap32(s, lo, lo, 0); 1371 } else { 1372 tcg_out_bswap_subr(s, bswap32_addr); 1373 /* delay slot */ 1374 tcg_out_opc_imm(s, OPC_LW, TCG_TMP0, base, 0); 1375 tcg_out_mov(s, TCG_TYPE_I32, lo, TCG_TMP3); 1376 } 1377 break; 1378 case MO_UL: 1379 if (TCG_TARGET_REG_BITS == 64 && is_64) { 1380 tcg_out_opc_imm(s, OPC_LWU, lo, base, 0); 1381 break; 1382 } 1383 /* FALLTHRU */ 1384 case MO_SL: 1385 tcg_out_opc_imm(s, OPC_LW, lo, base, 0); 1386 break; 1387 case MO_Q | MO_BSWAP: 1388 if (TCG_TARGET_REG_BITS == 64) { 1389 if (use_mips32r2_instructions) { 1390 tcg_out_opc_imm(s, OPC_LD, lo, base, 0); 1391 tcg_out_bswap64(s, lo, lo); 1392 } else { 1393 tcg_out_bswap_subr(s, bswap64_addr); 1394 /* delay slot */ 1395 tcg_out_opc_imm(s, OPC_LD, TCG_TMP0, base, 0); 1396 tcg_out_mov(s, TCG_TYPE_I64, lo, TCG_TMP3); 1397 } 1398 } else if (use_mips32r2_instructions) { 1399 tcg_out_opc_imm(s, OPC_LW, TCG_TMP0, base, 0); 1400 tcg_out_opc_imm(s, OPC_LW, TCG_TMP1, base, 4); 1401 tcg_out_opc_reg(s, OPC_WSBH, TCG_TMP0, 0, TCG_TMP0); 1402 tcg_out_opc_reg(s, OPC_WSBH, TCG_TMP1, 0, TCG_TMP1); 1403 tcg_out_opc_sa(s, OPC_ROTR, MIPS_BE ? lo : hi, TCG_TMP0, 16); 1404 tcg_out_opc_sa(s, OPC_ROTR, MIPS_BE ? hi : lo, TCG_TMP1, 16); 1405 } else { 1406 tcg_out_bswap_subr(s, bswap32_addr); 1407 /* delay slot */ 1408 tcg_out_opc_imm(s, OPC_LW, TCG_TMP0, base, 0); 1409 tcg_out_opc_imm(s, OPC_LW, TCG_TMP0, base, 4); 1410 tcg_out_bswap_subr(s, bswap32_addr); 1411 /* delay slot */ 1412 tcg_out_mov(s, TCG_TYPE_I32, MIPS_BE ? lo : hi, TCG_TMP3); 1413 tcg_out_mov(s, TCG_TYPE_I32, MIPS_BE ? hi : lo, TCG_TMP3); 1414 } 1415 break; 1416 case MO_Q: 1417 /* Prefer to load from offset 0 first, but allow for overlap. */ 1418 if (TCG_TARGET_REG_BITS == 64) { 1419 tcg_out_opc_imm(s, OPC_LD, lo, base, 0); 1420 } else if (MIPS_BE ? hi != base : lo == base) { 1421 tcg_out_opc_imm(s, OPC_LW, hi, base, HI_OFF); 1422 tcg_out_opc_imm(s, OPC_LW, lo, base, LO_OFF); 1423 } else { 1424 tcg_out_opc_imm(s, OPC_LW, lo, base, LO_OFF); 1425 tcg_out_opc_imm(s, OPC_LW, hi, base, HI_OFF); 1426 } 1427 break; 1428 default: 1429 tcg_abort(); 1430 } 1431} 1432 1433static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64) 1434{ 1435 TCGReg addr_regl, addr_regh __attribute__((unused)); 1436 TCGReg data_regl, data_regh; 1437 TCGMemOpIdx oi; 1438 MemOp opc; 1439#if defined(CONFIG_SOFTMMU) 1440 tcg_insn_unit *label_ptr[2]; 1441#endif 1442 TCGReg base = TCG_REG_A0; 1443 1444 data_regl = *args++; 1445 data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0); 1446 addr_regl = *args++; 1447 addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0); 1448 oi = *args++; 1449 opc = get_memop(oi); 1450 1451#if defined(CONFIG_SOFTMMU) 1452 tcg_out_tlb_load(s, base, addr_regl, addr_regh, oi, label_ptr, 1); 1453 tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64); 1454 add_qemu_ldst_label(s, 1, oi, 1455 (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32), 1456 data_regl, data_regh, addr_regl, addr_regh, 1457 s->code_ptr, label_ptr); 1458#else 1459 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { 1460 tcg_out_ext32u(s, base, addr_regl); 1461 addr_regl = base; 1462 } 1463 if (guest_base == 0 && data_regl != addr_regl) { 1464 base = addr_regl; 1465 } else if (guest_base == (int16_t)guest_base) { 1466 tcg_out_opc_imm(s, ALIAS_PADDI, base, addr_regl, guest_base); 1467 } else { 1468 tcg_out_opc_reg(s, ALIAS_PADD, base, TCG_GUEST_BASE_REG, addr_regl); 1469 } 1470 tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64); 1471#endif 1472} 1473 1474static void tcg_out_qemu_st_direct(TCGContext *s, TCGReg lo, TCGReg hi, 1475 TCGReg base, MemOp opc) 1476{ 1477 /* Don't clutter the code below with checks to avoid bswapping ZERO. */ 1478 if ((lo | hi) == 0) { 1479 opc &= ~MO_BSWAP; 1480 } 1481 1482 switch (opc & (MO_SIZE | MO_BSWAP)) { 1483 case MO_8: 1484 tcg_out_opc_imm(s, OPC_SB, lo, base, 0); 1485 break; 1486 1487 case MO_16 | MO_BSWAP: 1488 tcg_out_bswap16(s, TCG_TMP1, lo, 0); 1489 lo = TCG_TMP1; 1490 /* FALLTHRU */ 1491 case MO_16: 1492 tcg_out_opc_imm(s, OPC_SH, lo, base, 0); 1493 break; 1494 1495 case MO_32 | MO_BSWAP: 1496 tcg_out_bswap32(s, TCG_TMP3, lo, 0); 1497 lo = TCG_TMP3; 1498 /* FALLTHRU */ 1499 case MO_32: 1500 tcg_out_opc_imm(s, OPC_SW, lo, base, 0); 1501 break; 1502 1503 case MO_64 | MO_BSWAP: 1504 if (TCG_TARGET_REG_BITS == 64) { 1505 tcg_out_bswap64(s, TCG_TMP3, lo); 1506 tcg_out_opc_imm(s, OPC_SD, TCG_TMP3, base, 0); 1507 } else if (use_mips32r2_instructions) { 1508 tcg_out_opc_reg(s, OPC_WSBH, TCG_TMP0, 0, MIPS_BE ? lo : hi); 1509 tcg_out_opc_reg(s, OPC_WSBH, TCG_TMP1, 0, MIPS_BE ? hi : lo); 1510 tcg_out_opc_sa(s, OPC_ROTR, TCG_TMP0, TCG_TMP0, 16); 1511 tcg_out_opc_sa(s, OPC_ROTR, TCG_TMP1, TCG_TMP1, 16); 1512 tcg_out_opc_imm(s, OPC_SW, TCG_TMP0, base, 0); 1513 tcg_out_opc_imm(s, OPC_SW, TCG_TMP1, base, 4); 1514 } else { 1515 tcg_out_bswap32(s, TCG_TMP3, MIPS_BE ? lo : hi, 0); 1516 tcg_out_opc_imm(s, OPC_SW, TCG_TMP3, base, 0); 1517 tcg_out_bswap32(s, TCG_TMP3, MIPS_BE ? hi : lo, 0); 1518 tcg_out_opc_imm(s, OPC_SW, TCG_TMP3, base, 4); 1519 } 1520 break; 1521 case MO_64: 1522 if (TCG_TARGET_REG_BITS == 64) { 1523 tcg_out_opc_imm(s, OPC_SD, lo, base, 0); 1524 } else { 1525 tcg_out_opc_imm(s, OPC_SW, MIPS_BE ? hi : lo, base, 0); 1526 tcg_out_opc_imm(s, OPC_SW, MIPS_BE ? lo : hi, base, 4); 1527 } 1528 break; 1529 1530 default: 1531 tcg_abort(); 1532 } 1533} 1534 1535static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64) 1536{ 1537 TCGReg addr_regl, addr_regh __attribute__((unused)); 1538 TCGReg data_regl, data_regh; 1539 TCGMemOpIdx oi; 1540 MemOp opc; 1541#if defined(CONFIG_SOFTMMU) 1542 tcg_insn_unit *label_ptr[2]; 1543#endif 1544 TCGReg base = TCG_REG_A0; 1545 1546 data_regl = *args++; 1547 data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0); 1548 addr_regl = *args++; 1549 addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0); 1550 oi = *args++; 1551 opc = get_memop(oi); 1552 1553#if defined(CONFIG_SOFTMMU) 1554 tcg_out_tlb_load(s, base, addr_regl, addr_regh, oi, label_ptr, 0); 1555 tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc); 1556 add_qemu_ldst_label(s, 0, oi, 1557 (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32), 1558 data_regl, data_regh, addr_regl, addr_regh, 1559 s->code_ptr, label_ptr); 1560#else 1561 base = TCG_REG_A0; 1562 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { 1563 tcg_out_ext32u(s, base, addr_regl); 1564 addr_regl = base; 1565 } 1566 if (guest_base == 0) { 1567 base = addr_regl; 1568 } else if (guest_base == (int16_t)guest_base) { 1569 tcg_out_opc_imm(s, ALIAS_PADDI, base, addr_regl, guest_base); 1570 } else { 1571 tcg_out_opc_reg(s, ALIAS_PADD, base, TCG_GUEST_BASE_REG, addr_regl); 1572 } 1573 tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc); 1574#endif 1575} 1576 1577static void tcg_out_mb(TCGContext *s, TCGArg a0) 1578{ 1579 static const MIPSInsn sync[] = { 1580 /* Note that SYNC_MB is a slightly weaker than SYNC 0, 1581 as the former is an ordering barrier and the latter 1582 is a completion barrier. */ 1583 [0 ... TCG_MO_ALL] = OPC_SYNC_MB, 1584 [TCG_MO_LD_LD] = OPC_SYNC_RMB, 1585 [TCG_MO_ST_ST] = OPC_SYNC_WMB, 1586 [TCG_MO_LD_ST] = OPC_SYNC_RELEASE, 1587 [TCG_MO_LD_ST | TCG_MO_ST_ST] = OPC_SYNC_RELEASE, 1588 [TCG_MO_LD_ST | TCG_MO_LD_LD] = OPC_SYNC_ACQUIRE, 1589 }; 1590 tcg_out32(s, sync[a0 & TCG_MO_ALL]); 1591} 1592 1593static void tcg_out_clz(TCGContext *s, MIPSInsn opcv2, MIPSInsn opcv6, 1594 int width, TCGReg a0, TCGReg a1, TCGArg a2) 1595{ 1596 if (use_mips32r6_instructions) { 1597 if (a2 == width) { 1598 tcg_out_opc_reg(s, opcv6, a0, a1, 0); 1599 } else { 1600 tcg_out_opc_reg(s, opcv6, TCG_TMP0, a1, 0); 1601 tcg_out_movcond(s, TCG_COND_EQ, a0, a1, 0, a2, TCG_TMP0); 1602 } 1603 } else { 1604 if (a2 == width) { 1605 tcg_out_opc_reg(s, opcv2, a0, a1, a1); 1606 } else if (a0 == a2) { 1607 tcg_out_opc_reg(s, opcv2, TCG_TMP0, a1, a1); 1608 tcg_out_opc_reg(s, OPC_MOVN, a0, TCG_TMP0, a1); 1609 } else if (a0 != a1) { 1610 tcg_out_opc_reg(s, opcv2, a0, a1, a1); 1611 tcg_out_opc_reg(s, OPC_MOVZ, a0, a2, a1); 1612 } else { 1613 tcg_out_opc_reg(s, opcv2, TCG_TMP0, a1, a1); 1614 tcg_out_opc_reg(s, OPC_MOVZ, TCG_TMP0, a2, a1); 1615 tcg_out_mov(s, TCG_TYPE_REG, a0, TCG_TMP0); 1616 } 1617 } 1618} 1619 1620static void tcg_out_op(TCGContext *s, TCGOpcode opc, 1621 const TCGArg args[TCG_MAX_OP_ARGS], 1622 const int const_args[TCG_MAX_OP_ARGS]) 1623{ 1624 MIPSInsn i1, i2; 1625 TCGArg a0, a1, a2; 1626 int c2; 1627 1628 /* 1629 * Note that many operands use the constraint set "rZ". 1630 * We make use of the fact that 0 is the ZERO register, 1631 * and hence such cases need not check for const_args. 1632 */ 1633 a0 = args[0]; 1634 a1 = args[1]; 1635 a2 = args[2]; 1636 c2 = const_args[2]; 1637 1638 switch (opc) { 1639 case INDEX_op_exit_tb: 1640 { 1641 TCGReg b0 = TCG_REG_ZERO; 1642 1643 a0 = (intptr_t)a0; 1644 if (a0 & ~0xffff) { 1645 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_V0, a0 & ~0xffff); 1646 b0 = TCG_REG_V0; 1647 } 1648 if (!tcg_out_opc_jmp(s, OPC_J, tb_ret_addr)) { 1649 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, 1650 (uintptr_t)tb_ret_addr); 1651 tcg_out_opc_reg(s, OPC_JR, 0, TCG_TMP0, 0); 1652 } 1653 tcg_out_opc_imm(s, OPC_ORI, TCG_REG_V0, b0, a0 & 0xffff); 1654 } 1655 break; 1656 case INDEX_op_goto_tb: 1657 /* indirect jump method */ 1658 tcg_debug_assert(s->tb_jmp_insn_offset == 0); 1659 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP0, TCG_REG_ZERO, 1660 (uintptr_t)(s->tb_jmp_target_addr + a0)); 1661 tcg_out_opc_reg(s, OPC_JR, 0, TCG_TMP0, 0); 1662 tcg_out_nop(s); 1663 set_jmp_reset_offset(s, a0); 1664 break; 1665 case INDEX_op_goto_ptr: 1666 /* jmp to the given host address (could be epilogue) */ 1667 tcg_out_opc_reg(s, OPC_JR, 0, a0, 0); 1668 tcg_out_nop(s); 1669 break; 1670 case INDEX_op_br: 1671 tcg_out_brcond(s, TCG_COND_EQ, TCG_REG_ZERO, TCG_REG_ZERO, 1672 arg_label(a0)); 1673 break; 1674 1675 case INDEX_op_ld8u_i32: 1676 case INDEX_op_ld8u_i64: 1677 i1 = OPC_LBU; 1678 goto do_ldst; 1679 case INDEX_op_ld8s_i32: 1680 case INDEX_op_ld8s_i64: 1681 i1 = OPC_LB; 1682 goto do_ldst; 1683 case INDEX_op_ld16u_i32: 1684 case INDEX_op_ld16u_i64: 1685 i1 = OPC_LHU; 1686 goto do_ldst; 1687 case INDEX_op_ld16s_i32: 1688 case INDEX_op_ld16s_i64: 1689 i1 = OPC_LH; 1690 goto do_ldst; 1691 case INDEX_op_ld_i32: 1692 case INDEX_op_ld32s_i64: 1693 i1 = OPC_LW; 1694 goto do_ldst; 1695 case INDEX_op_ld32u_i64: 1696 i1 = OPC_LWU; 1697 goto do_ldst; 1698 case INDEX_op_ld_i64: 1699 i1 = OPC_LD; 1700 goto do_ldst; 1701 case INDEX_op_st8_i32: 1702 case INDEX_op_st8_i64: 1703 i1 = OPC_SB; 1704 goto do_ldst; 1705 case INDEX_op_st16_i32: 1706 case INDEX_op_st16_i64: 1707 i1 = OPC_SH; 1708 goto do_ldst; 1709 case INDEX_op_st_i32: 1710 case INDEX_op_st32_i64: 1711 i1 = OPC_SW; 1712 goto do_ldst; 1713 case INDEX_op_st_i64: 1714 i1 = OPC_SD; 1715 do_ldst: 1716 tcg_out_ldst(s, i1, a0, a1, a2); 1717 break; 1718 1719 case INDEX_op_add_i32: 1720 i1 = OPC_ADDU, i2 = OPC_ADDIU; 1721 goto do_binary; 1722 case INDEX_op_add_i64: 1723 i1 = OPC_DADDU, i2 = OPC_DADDIU; 1724 goto do_binary; 1725 case INDEX_op_or_i32: 1726 case INDEX_op_or_i64: 1727 i1 = OPC_OR, i2 = OPC_ORI; 1728 goto do_binary; 1729 case INDEX_op_xor_i32: 1730 case INDEX_op_xor_i64: 1731 i1 = OPC_XOR, i2 = OPC_XORI; 1732 do_binary: 1733 if (c2) { 1734 tcg_out_opc_imm(s, i2, a0, a1, a2); 1735 break; 1736 } 1737 do_binaryv: 1738 tcg_out_opc_reg(s, i1, a0, a1, a2); 1739 break; 1740 1741 case INDEX_op_sub_i32: 1742 i1 = OPC_SUBU, i2 = OPC_ADDIU; 1743 goto do_subtract; 1744 case INDEX_op_sub_i64: 1745 i1 = OPC_DSUBU, i2 = OPC_DADDIU; 1746 do_subtract: 1747 if (c2) { 1748 tcg_out_opc_imm(s, i2, a0, a1, -a2); 1749 break; 1750 } 1751 goto do_binaryv; 1752 case INDEX_op_and_i32: 1753 if (c2 && a2 != (uint16_t)a2) { 1754 int msb = ctz32(~a2) - 1; 1755 tcg_debug_assert(use_mips32r2_instructions); 1756 tcg_debug_assert(is_p2m1(a2)); 1757 tcg_out_opc_bf(s, OPC_EXT, a0, a1, msb, 0); 1758 break; 1759 } 1760 i1 = OPC_AND, i2 = OPC_ANDI; 1761 goto do_binary; 1762 case INDEX_op_and_i64: 1763 if (c2 && a2 != (uint16_t)a2) { 1764 int msb = ctz64(~a2) - 1; 1765 tcg_debug_assert(use_mips32r2_instructions); 1766 tcg_debug_assert(is_p2m1(a2)); 1767 tcg_out_opc_bf64(s, OPC_DEXT, OPC_DEXTM, OPC_DEXTU, a0, a1, msb, 0); 1768 break; 1769 } 1770 i1 = OPC_AND, i2 = OPC_ANDI; 1771 goto do_binary; 1772 case INDEX_op_nor_i32: 1773 case INDEX_op_nor_i64: 1774 i1 = OPC_NOR; 1775 goto do_binaryv; 1776 1777 case INDEX_op_mul_i32: 1778 if (use_mips32_instructions) { 1779 tcg_out_opc_reg(s, OPC_MUL, a0, a1, a2); 1780 break; 1781 } 1782 i1 = OPC_MULT, i2 = OPC_MFLO; 1783 goto do_hilo1; 1784 case INDEX_op_mulsh_i32: 1785 if (use_mips32r6_instructions) { 1786 tcg_out_opc_reg(s, OPC_MUH, a0, a1, a2); 1787 break; 1788 } 1789 i1 = OPC_MULT, i2 = OPC_MFHI; 1790 goto do_hilo1; 1791 case INDEX_op_muluh_i32: 1792 if (use_mips32r6_instructions) { 1793 tcg_out_opc_reg(s, OPC_MUHU, a0, a1, a2); 1794 break; 1795 } 1796 i1 = OPC_MULTU, i2 = OPC_MFHI; 1797 goto do_hilo1; 1798 case INDEX_op_div_i32: 1799 if (use_mips32r6_instructions) { 1800 tcg_out_opc_reg(s, OPC_DIV_R6, a0, a1, a2); 1801 break; 1802 } 1803 i1 = OPC_DIV, i2 = OPC_MFLO; 1804 goto do_hilo1; 1805 case INDEX_op_divu_i32: 1806 if (use_mips32r6_instructions) { 1807 tcg_out_opc_reg(s, OPC_DIVU_R6, a0, a1, a2); 1808 break; 1809 } 1810 i1 = OPC_DIVU, i2 = OPC_MFLO; 1811 goto do_hilo1; 1812 case INDEX_op_rem_i32: 1813 if (use_mips32r6_instructions) { 1814 tcg_out_opc_reg(s, OPC_MOD, a0, a1, a2); 1815 break; 1816 } 1817 i1 = OPC_DIV, i2 = OPC_MFHI; 1818 goto do_hilo1; 1819 case INDEX_op_remu_i32: 1820 if (use_mips32r6_instructions) { 1821 tcg_out_opc_reg(s, OPC_MODU, a0, a1, a2); 1822 break; 1823 } 1824 i1 = OPC_DIVU, i2 = OPC_MFHI; 1825 goto do_hilo1; 1826 case INDEX_op_mul_i64: 1827 if (use_mips32r6_instructions) { 1828 tcg_out_opc_reg(s, OPC_DMUL, a0, a1, a2); 1829 break; 1830 } 1831 i1 = OPC_DMULT, i2 = OPC_MFLO; 1832 goto do_hilo1; 1833 case INDEX_op_mulsh_i64: 1834 if (use_mips32r6_instructions) { 1835 tcg_out_opc_reg(s, OPC_DMUH, a0, a1, a2); 1836 break; 1837 } 1838 i1 = OPC_DMULT, i2 = OPC_MFHI; 1839 goto do_hilo1; 1840 case INDEX_op_muluh_i64: 1841 if (use_mips32r6_instructions) { 1842 tcg_out_opc_reg(s, OPC_DMUHU, a0, a1, a2); 1843 break; 1844 } 1845 i1 = OPC_DMULTU, i2 = OPC_MFHI; 1846 goto do_hilo1; 1847 case INDEX_op_div_i64: 1848 if (use_mips32r6_instructions) { 1849 tcg_out_opc_reg(s, OPC_DDIV_R6, a0, a1, a2); 1850 break; 1851 } 1852 i1 = OPC_DDIV, i2 = OPC_MFLO; 1853 goto do_hilo1; 1854 case INDEX_op_divu_i64: 1855 if (use_mips32r6_instructions) { 1856 tcg_out_opc_reg(s, OPC_DDIVU_R6, a0, a1, a2); 1857 break; 1858 } 1859 i1 = OPC_DDIVU, i2 = OPC_MFLO; 1860 goto do_hilo1; 1861 case INDEX_op_rem_i64: 1862 if (use_mips32r6_instructions) { 1863 tcg_out_opc_reg(s, OPC_DMOD, a0, a1, a2); 1864 break; 1865 } 1866 i1 = OPC_DDIV, i2 = OPC_MFHI; 1867 goto do_hilo1; 1868 case INDEX_op_remu_i64: 1869 if (use_mips32r6_instructions) { 1870 tcg_out_opc_reg(s, OPC_DMODU, a0, a1, a2); 1871 break; 1872 } 1873 i1 = OPC_DDIVU, i2 = OPC_MFHI; 1874 do_hilo1: 1875 tcg_out_opc_reg(s, i1, 0, a1, a2); 1876 tcg_out_opc_reg(s, i2, a0, 0, 0); 1877 break; 1878 1879 case INDEX_op_muls2_i32: 1880 i1 = OPC_MULT; 1881 goto do_hilo2; 1882 case INDEX_op_mulu2_i32: 1883 i1 = OPC_MULTU; 1884 goto do_hilo2; 1885 case INDEX_op_muls2_i64: 1886 i1 = OPC_DMULT; 1887 goto do_hilo2; 1888 case INDEX_op_mulu2_i64: 1889 i1 = OPC_DMULTU; 1890 do_hilo2: 1891 tcg_out_opc_reg(s, i1, 0, a2, args[3]); 1892 tcg_out_opc_reg(s, OPC_MFLO, a0, 0, 0); 1893 tcg_out_opc_reg(s, OPC_MFHI, a1, 0, 0); 1894 break; 1895 1896 case INDEX_op_not_i32: 1897 case INDEX_op_not_i64: 1898 i1 = OPC_NOR; 1899 goto do_unary; 1900 case INDEX_op_ext8s_i32: 1901 case INDEX_op_ext8s_i64: 1902 i1 = OPC_SEB; 1903 goto do_unary; 1904 case INDEX_op_ext16s_i32: 1905 case INDEX_op_ext16s_i64: 1906 i1 = OPC_SEH; 1907 do_unary: 1908 tcg_out_opc_reg(s, i1, a0, TCG_REG_ZERO, a1); 1909 break; 1910 1911 case INDEX_op_bswap16_i32: 1912 case INDEX_op_bswap16_i64: 1913 tcg_out_bswap16(s, a0, a1, a2); 1914 break; 1915 case INDEX_op_bswap32_i32: 1916 tcg_out_bswap32(s, a0, a1, 0); 1917 break; 1918 case INDEX_op_bswap32_i64: 1919 tcg_out_bswap32(s, a0, a1, a2); 1920 break; 1921 case INDEX_op_bswap64_i64: 1922 tcg_out_bswap64(s, a0, a1); 1923 break; 1924 case INDEX_op_extrh_i64_i32: 1925 tcg_out_dsra(s, a0, a1, 32); 1926 break; 1927 case INDEX_op_ext32s_i64: 1928 case INDEX_op_ext_i32_i64: 1929 case INDEX_op_extrl_i64_i32: 1930 tcg_out_opc_sa(s, OPC_SLL, a0, a1, 0); 1931 break; 1932 case INDEX_op_ext32u_i64: 1933 case INDEX_op_extu_i32_i64: 1934 tcg_out_ext32u(s, a0, a1); 1935 break; 1936 1937 case INDEX_op_sar_i32: 1938 i1 = OPC_SRAV, i2 = OPC_SRA; 1939 goto do_shift; 1940 case INDEX_op_shl_i32: 1941 i1 = OPC_SLLV, i2 = OPC_SLL; 1942 goto do_shift; 1943 case INDEX_op_shr_i32: 1944 i1 = OPC_SRLV, i2 = OPC_SRL; 1945 goto do_shift; 1946 case INDEX_op_rotr_i32: 1947 i1 = OPC_ROTRV, i2 = OPC_ROTR; 1948 do_shift: 1949 if (c2) { 1950 tcg_out_opc_sa(s, i2, a0, a1, a2); 1951 break; 1952 } 1953 do_shiftv: 1954 tcg_out_opc_reg(s, i1, a0, a2, a1); 1955 break; 1956 case INDEX_op_rotl_i32: 1957 if (c2) { 1958 tcg_out_opc_sa(s, OPC_ROTR, a0, a1, 32 - a2); 1959 } else { 1960 tcg_out_opc_reg(s, OPC_SUBU, TCG_TMP0, TCG_REG_ZERO, a2); 1961 tcg_out_opc_reg(s, OPC_ROTRV, a0, TCG_TMP0, a1); 1962 } 1963 break; 1964 case INDEX_op_sar_i64: 1965 if (c2) { 1966 tcg_out_dsra(s, a0, a1, a2); 1967 break; 1968 } 1969 i1 = OPC_DSRAV; 1970 goto do_shiftv; 1971 case INDEX_op_shl_i64: 1972 if (c2) { 1973 tcg_out_dsll(s, a0, a1, a2); 1974 break; 1975 } 1976 i1 = OPC_DSLLV; 1977 goto do_shiftv; 1978 case INDEX_op_shr_i64: 1979 if (c2) { 1980 tcg_out_dsrl(s, a0, a1, a2); 1981 break; 1982 } 1983 i1 = OPC_DSRLV; 1984 goto do_shiftv; 1985 case INDEX_op_rotr_i64: 1986 if (c2) { 1987 tcg_out_opc_sa64(s, OPC_DROTR, OPC_DROTR32, a0, a1, a2); 1988 break; 1989 } 1990 i1 = OPC_DROTRV; 1991 goto do_shiftv; 1992 case INDEX_op_rotl_i64: 1993 if (c2) { 1994 tcg_out_opc_sa64(s, OPC_DROTR, OPC_DROTR32, a0, a1, 64 - a2); 1995 } else { 1996 tcg_out_opc_reg(s, OPC_DSUBU, TCG_TMP0, TCG_REG_ZERO, a2); 1997 tcg_out_opc_reg(s, OPC_DROTRV, a0, TCG_TMP0, a1); 1998 } 1999 break; 2000 2001 case INDEX_op_clz_i32: 2002 tcg_out_clz(s, OPC_CLZ, OPC_CLZ_R6, 32, a0, a1, a2); 2003 break; 2004 case INDEX_op_clz_i64: 2005 tcg_out_clz(s, OPC_DCLZ, OPC_DCLZ_R6, 64, a0, a1, a2); 2006 break; 2007 2008 case INDEX_op_deposit_i32: 2009 tcg_out_opc_bf(s, OPC_INS, a0, a2, args[3] + args[4] - 1, args[3]); 2010 break; 2011 case INDEX_op_deposit_i64: 2012 tcg_out_opc_bf64(s, OPC_DINS, OPC_DINSM, OPC_DINSU, a0, a2, 2013 args[3] + args[4] - 1, args[3]); 2014 break; 2015 case INDEX_op_extract_i32: 2016 tcg_out_opc_bf(s, OPC_EXT, a0, a1, args[3] - 1, a2); 2017 break; 2018 case INDEX_op_extract_i64: 2019 tcg_out_opc_bf64(s, OPC_DEXT, OPC_DEXTM, OPC_DEXTU, a0, a1, 2020 args[3] - 1, a2); 2021 break; 2022 2023 case INDEX_op_brcond_i32: 2024 case INDEX_op_brcond_i64: 2025 tcg_out_brcond(s, a2, a0, a1, arg_label(args[3])); 2026 break; 2027 case INDEX_op_brcond2_i32: 2028 tcg_out_brcond2(s, args[4], a0, a1, a2, args[3], arg_label(args[5])); 2029 break; 2030 2031 case INDEX_op_movcond_i32: 2032 case INDEX_op_movcond_i64: 2033 tcg_out_movcond(s, args[5], a0, a1, a2, args[3], args[4]); 2034 break; 2035 2036 case INDEX_op_setcond_i32: 2037 case INDEX_op_setcond_i64: 2038 tcg_out_setcond(s, args[3], a0, a1, a2); 2039 break; 2040 case INDEX_op_setcond2_i32: 2041 tcg_out_setcond2(s, args[5], a0, a1, a2, args[3], args[4]); 2042 break; 2043 2044 case INDEX_op_qemu_ld_i32: 2045 tcg_out_qemu_ld(s, args, false); 2046 break; 2047 case INDEX_op_qemu_ld_i64: 2048 tcg_out_qemu_ld(s, args, true); 2049 break; 2050 case INDEX_op_qemu_st_i32: 2051 tcg_out_qemu_st(s, args, false); 2052 break; 2053 case INDEX_op_qemu_st_i64: 2054 tcg_out_qemu_st(s, args, true); 2055 break; 2056 2057 case INDEX_op_add2_i32: 2058 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], 2059 const_args[4], const_args[5], false); 2060 break; 2061 case INDEX_op_sub2_i32: 2062 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], 2063 const_args[4], const_args[5], true); 2064 break; 2065 2066 case INDEX_op_mb: 2067 tcg_out_mb(s, a0); 2068 break; 2069 case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ 2070 case INDEX_op_mov_i64: 2071 case INDEX_op_call: /* Always emitted via tcg_out_call. */ 2072 default: 2073 tcg_abort(); 2074 } 2075} 2076 2077static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op) 2078{ 2079 switch (op) { 2080 case INDEX_op_goto_ptr: 2081 return C_O0_I1(r); 2082 2083 case INDEX_op_ld8u_i32: 2084 case INDEX_op_ld8s_i32: 2085 case INDEX_op_ld16u_i32: 2086 case INDEX_op_ld16s_i32: 2087 case INDEX_op_ld_i32: 2088 case INDEX_op_not_i32: 2089 case INDEX_op_bswap16_i32: 2090 case INDEX_op_bswap32_i32: 2091 case INDEX_op_ext8s_i32: 2092 case INDEX_op_ext16s_i32: 2093 case INDEX_op_extract_i32: 2094 case INDEX_op_ld8u_i64: 2095 case INDEX_op_ld8s_i64: 2096 case INDEX_op_ld16u_i64: 2097 case INDEX_op_ld16s_i64: 2098 case INDEX_op_ld32s_i64: 2099 case INDEX_op_ld32u_i64: 2100 case INDEX_op_ld_i64: 2101 case INDEX_op_not_i64: 2102 case INDEX_op_bswap16_i64: 2103 case INDEX_op_bswap32_i64: 2104 case INDEX_op_bswap64_i64: 2105 case INDEX_op_ext8s_i64: 2106 case INDEX_op_ext16s_i64: 2107 case INDEX_op_ext32s_i64: 2108 case INDEX_op_ext32u_i64: 2109 case INDEX_op_ext_i32_i64: 2110 case INDEX_op_extu_i32_i64: 2111 case INDEX_op_extrl_i64_i32: 2112 case INDEX_op_extrh_i64_i32: 2113 case INDEX_op_extract_i64: 2114 return C_O1_I1(r, r); 2115 2116 case INDEX_op_st8_i32: 2117 case INDEX_op_st16_i32: 2118 case INDEX_op_st_i32: 2119 case INDEX_op_st8_i64: 2120 case INDEX_op_st16_i64: 2121 case INDEX_op_st32_i64: 2122 case INDEX_op_st_i64: 2123 return C_O0_I2(rZ, r); 2124 2125 case INDEX_op_add_i32: 2126 case INDEX_op_add_i64: 2127 return C_O1_I2(r, r, rJ); 2128 case INDEX_op_sub_i32: 2129 case INDEX_op_sub_i64: 2130 return C_O1_I2(r, rZ, rN); 2131 case INDEX_op_mul_i32: 2132 case INDEX_op_mulsh_i32: 2133 case INDEX_op_muluh_i32: 2134 case INDEX_op_div_i32: 2135 case INDEX_op_divu_i32: 2136 case INDEX_op_rem_i32: 2137 case INDEX_op_remu_i32: 2138 case INDEX_op_nor_i32: 2139 case INDEX_op_setcond_i32: 2140 case INDEX_op_mul_i64: 2141 case INDEX_op_mulsh_i64: 2142 case INDEX_op_muluh_i64: 2143 case INDEX_op_div_i64: 2144 case INDEX_op_divu_i64: 2145 case INDEX_op_rem_i64: 2146 case INDEX_op_remu_i64: 2147 case INDEX_op_nor_i64: 2148 case INDEX_op_setcond_i64: 2149 return C_O1_I2(r, rZ, rZ); 2150 case INDEX_op_muls2_i32: 2151 case INDEX_op_mulu2_i32: 2152 case INDEX_op_muls2_i64: 2153 case INDEX_op_mulu2_i64: 2154 return C_O2_I2(r, r, r, r); 2155 case INDEX_op_and_i32: 2156 case INDEX_op_and_i64: 2157 return C_O1_I2(r, r, rIK); 2158 case INDEX_op_or_i32: 2159 case INDEX_op_xor_i32: 2160 case INDEX_op_or_i64: 2161 case INDEX_op_xor_i64: 2162 return C_O1_I2(r, r, rI); 2163 case INDEX_op_shl_i32: 2164 case INDEX_op_shr_i32: 2165 case INDEX_op_sar_i32: 2166 case INDEX_op_rotr_i32: 2167 case INDEX_op_rotl_i32: 2168 case INDEX_op_shl_i64: 2169 case INDEX_op_shr_i64: 2170 case INDEX_op_sar_i64: 2171 case INDEX_op_rotr_i64: 2172 case INDEX_op_rotl_i64: 2173 return C_O1_I2(r, r, ri); 2174 case INDEX_op_clz_i32: 2175 case INDEX_op_clz_i64: 2176 return C_O1_I2(r, r, rWZ); 2177 2178 case INDEX_op_deposit_i32: 2179 case INDEX_op_deposit_i64: 2180 return C_O1_I2(r, 0, rZ); 2181 case INDEX_op_brcond_i32: 2182 case INDEX_op_brcond_i64: 2183 return C_O0_I2(rZ, rZ); 2184 case INDEX_op_movcond_i32: 2185 case INDEX_op_movcond_i64: 2186 return (use_mips32r6_instructions 2187 ? C_O1_I4(r, rZ, rZ, rZ, rZ) 2188 : C_O1_I4(r, rZ, rZ, rZ, 0)); 2189 case INDEX_op_add2_i32: 2190 case INDEX_op_sub2_i32: 2191 return C_O2_I4(r, r, rZ, rZ, rN, rN); 2192 case INDEX_op_setcond2_i32: 2193 return C_O1_I4(r, rZ, rZ, rZ, rZ); 2194 case INDEX_op_brcond2_i32: 2195 return C_O0_I4(rZ, rZ, rZ, rZ); 2196 2197 case INDEX_op_qemu_ld_i32: 2198 return (TCG_TARGET_REG_BITS == 64 || TARGET_LONG_BITS == 32 2199 ? C_O1_I1(r, L) : C_O1_I2(r, L, L)); 2200 case INDEX_op_qemu_st_i32: 2201 return (TCG_TARGET_REG_BITS == 64 || TARGET_LONG_BITS == 32 2202 ? C_O0_I2(SZ, S) : C_O0_I3(SZ, S, S)); 2203 case INDEX_op_qemu_ld_i64: 2204 return (TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, L) 2205 : TARGET_LONG_BITS == 32 ? C_O2_I1(r, r, L) 2206 : C_O2_I2(r, r, L, L)); 2207 case INDEX_op_qemu_st_i64: 2208 return (TCG_TARGET_REG_BITS == 64 ? C_O0_I2(SZ, S) 2209 : TARGET_LONG_BITS == 32 ? C_O0_I3(SZ, SZ, S) 2210 : C_O0_I4(SZ, SZ, S, S)); 2211 2212 default: 2213 g_assert_not_reached(); 2214 } 2215} 2216 2217static const int tcg_target_callee_save_regs[] = { 2218 TCG_REG_S0, /* used for the global env (TCG_AREG0) */ 2219 TCG_REG_S1, 2220 TCG_REG_S2, 2221 TCG_REG_S3, 2222 TCG_REG_S4, 2223 TCG_REG_S5, 2224 TCG_REG_S6, 2225 TCG_REG_S7, 2226 TCG_REG_S8, 2227 TCG_REG_RA, /* should be last for ABI compliance */ 2228}; 2229 2230/* The Linux kernel doesn't provide any information about the available 2231 instruction set. Probe it using a signal handler. */ 2232 2233 2234#ifndef use_movnz_instructions 2235bool use_movnz_instructions = false; 2236#endif 2237 2238#ifndef use_mips32_instructions 2239bool use_mips32_instructions = false; 2240#endif 2241 2242#ifndef use_mips32r2_instructions 2243bool use_mips32r2_instructions = false; 2244#endif 2245 2246static volatile sig_atomic_t got_sigill; 2247 2248static void sigill_handler(int signo, siginfo_t *si, void *data) 2249{ 2250 /* Skip the faulty instruction */ 2251 ucontext_t *uc = (ucontext_t *)data; 2252 uc->uc_mcontext.pc += 4; 2253 2254 got_sigill = 1; 2255} 2256 2257static void tcg_target_detect_isa(void) 2258{ 2259 struct sigaction sa_old, sa_new; 2260 2261 memset(&sa_new, 0, sizeof(sa_new)); 2262 sa_new.sa_flags = SA_SIGINFO; 2263 sa_new.sa_sigaction = sigill_handler; 2264 sigaction(SIGILL, &sa_new, &sa_old); 2265 2266 /* Probe for movn/movz, necessary to implement movcond. */ 2267#ifndef use_movnz_instructions 2268 got_sigill = 0; 2269 asm volatile(".set push\n" 2270 ".set mips32\n" 2271 "movn $zero, $zero, $zero\n" 2272 "movz $zero, $zero, $zero\n" 2273 ".set pop\n" 2274 : : : ); 2275 use_movnz_instructions = !got_sigill; 2276#endif 2277 2278 /* Probe for MIPS32 instructions. As no subsetting is allowed 2279 by the specification, it is only necessary to probe for one 2280 of the instructions. */ 2281#ifndef use_mips32_instructions 2282 got_sigill = 0; 2283 asm volatile(".set push\n" 2284 ".set mips32\n" 2285 "mul $zero, $zero\n" 2286 ".set pop\n" 2287 : : : ); 2288 use_mips32_instructions = !got_sigill; 2289#endif 2290 2291 /* Probe for MIPS32r2 instructions if MIPS32 instructions are 2292 available. As no subsetting is allowed by the specification, 2293 it is only necessary to probe for one of the instructions. */ 2294#ifndef use_mips32r2_instructions 2295 if (use_mips32_instructions) { 2296 got_sigill = 0; 2297 asm volatile(".set push\n" 2298 ".set mips32r2\n" 2299 "seb $zero, $zero\n" 2300 ".set pop\n" 2301 : : : ); 2302 use_mips32r2_instructions = !got_sigill; 2303 } 2304#endif 2305 2306 sigaction(SIGILL, &sa_old, NULL); 2307} 2308 2309static tcg_insn_unit *align_code_ptr(TCGContext *s) 2310{ 2311 uintptr_t p = (uintptr_t)s->code_ptr; 2312 if (p & 15) { 2313 p = (p + 15) & -16; 2314 s->code_ptr = (void *)p; 2315 } 2316 return s->code_ptr; 2317} 2318 2319/* Stack frame parameters. */ 2320#define REG_SIZE (TCG_TARGET_REG_BITS / 8) 2321#define SAVE_SIZE ((int)ARRAY_SIZE(tcg_target_callee_save_regs) * REG_SIZE) 2322#define TEMP_SIZE (CPU_TEMP_BUF_NLONGS * (int)sizeof(long)) 2323 2324#define FRAME_SIZE ((TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE + SAVE_SIZE \ 2325 + TCG_TARGET_STACK_ALIGN - 1) \ 2326 & -TCG_TARGET_STACK_ALIGN) 2327#define SAVE_OFS (TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE) 2328 2329/* We're expecting to be able to use an immediate for frame allocation. */ 2330QEMU_BUILD_BUG_ON(FRAME_SIZE > 0x7fff); 2331 2332/* Generate global QEMU prologue and epilogue code */ 2333static void tcg_target_qemu_prologue(TCGContext *s) 2334{ 2335 int i; 2336 2337 tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, TEMP_SIZE); 2338 2339 /* TB prologue */ 2340 tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_SP, TCG_REG_SP, -FRAME_SIZE); 2341 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { 2342 tcg_out_st(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], 2343 TCG_REG_SP, SAVE_OFS + i * REG_SIZE); 2344 } 2345 2346#ifndef CONFIG_SOFTMMU 2347 if (guest_base) { 2348 tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base); 2349 tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG); 2350 } 2351#endif 2352 2353 /* Call generated code */ 2354 tcg_out_opc_reg(s, OPC_JR, 0, tcg_target_call_iarg_regs[1], 0); 2355 /* delay slot */ 2356 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); 2357 2358 /* 2359 * Return path for goto_ptr. Set return value to 0, a-la exit_tb, 2360 * and fall through to the rest of the epilogue. 2361 */ 2362 tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr); 2363 tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_V0, TCG_REG_ZERO); 2364 2365 /* TB epilogue */ 2366 tb_ret_addr = tcg_splitwx_to_rx(s->code_ptr); 2367 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { 2368 tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], 2369 TCG_REG_SP, SAVE_OFS + i * REG_SIZE); 2370 } 2371 2372 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2373 /* delay slot */ 2374 tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE); 2375 2376 if (use_mips32r2_instructions) { 2377 return; 2378 } 2379 2380 /* Bswap subroutines: Input in TCG_TMP0, output in TCG_TMP3; 2381 clobbers TCG_TMP1, TCG_TMP2. */ 2382 2383 /* 2384 * bswap32 -- 32-bit swap (signed result for mips64). a0 = abcd. 2385 */ 2386 bswap32_addr = tcg_splitwx_to_rx(align_code_ptr(s)); 2387 /* t3 = (ssss)d000 */ 2388 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP3, TCG_TMP0, 24); 2389 /* t1 = 000a */ 2390 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP1, TCG_TMP0, 24); 2391 /* t2 = 00c0 */ 2392 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP0, 0xff00); 2393 /* t3 = d00a */ 2394 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2395 /* t1 = 0abc */ 2396 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP1, TCG_TMP0, 8); 2397 /* t2 = 0c00 */ 2398 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP2, TCG_TMP2, 8); 2399 /* t1 = 00b0 */ 2400 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2401 /* t3 = dc0a */ 2402 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2403 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2404 /* t3 = dcba -- delay slot */ 2405 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2406 2407 if (TCG_TARGET_REG_BITS == 32) { 2408 return; 2409 } 2410 2411 /* 2412 * bswap32u -- unsigned 32-bit swap. a0 = ....abcd. 2413 */ 2414 bswap32u_addr = tcg_splitwx_to_rx(align_code_ptr(s)); 2415 /* t1 = (0000)000d */ 2416 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP0, 0xff); 2417 /* t3 = 000a */ 2418 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP3, TCG_TMP0, 24); 2419 /* t1 = (0000)d000 */ 2420 tcg_out_dsll(s, TCG_TMP1, TCG_TMP1, 24); 2421 /* t2 = 00c0 */ 2422 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP0, 0xff00); 2423 /* t3 = d00a */ 2424 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2425 /* t1 = 0abc */ 2426 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP1, TCG_TMP0, 8); 2427 /* t2 = 0c00 */ 2428 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP2, TCG_TMP2, 8); 2429 /* t1 = 00b0 */ 2430 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2431 /* t3 = dc0a */ 2432 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2433 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2434 /* t3 = dcba -- delay slot */ 2435 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2436 2437 /* 2438 * bswap64 -- 64-bit swap. a0 = abcdefgh 2439 */ 2440 bswap64_addr = tcg_splitwx_to_rx(align_code_ptr(s)); 2441 /* t3 = h0000000 */ 2442 tcg_out_dsll(s, TCG_TMP3, TCG_TMP0, 56); 2443 /* t1 = 0000000a */ 2444 tcg_out_dsrl(s, TCG_TMP1, TCG_TMP0, 56); 2445 2446 /* t2 = 000000g0 */ 2447 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP0, 0xff00); 2448 /* t3 = h000000a */ 2449 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2450 /* t1 = 00000abc */ 2451 tcg_out_dsrl(s, TCG_TMP1, TCG_TMP0, 40); 2452 /* t2 = 0g000000 */ 2453 tcg_out_dsll(s, TCG_TMP2, TCG_TMP2, 40); 2454 /* t1 = 000000b0 */ 2455 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2456 2457 /* t3 = hg00000a */ 2458 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2459 /* t2 = 0000abcd */ 2460 tcg_out_dsrl(s, TCG_TMP2, TCG_TMP0, 32); 2461 /* t3 = hg0000ba */ 2462 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2463 2464 /* t1 = 000000c0 */ 2465 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP2, 0xff00); 2466 /* t2 = 0000000d */ 2467 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP2, 0x00ff); 2468 /* t1 = 00000c00 */ 2469 tcg_out_dsll(s, TCG_TMP1, TCG_TMP1, 8); 2470 /* t2 = 0000d000 */ 2471 tcg_out_dsll(s, TCG_TMP2, TCG_TMP2, 24); 2472 2473 /* t3 = hg000cba */ 2474 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2475 /* t1 = 00abcdef */ 2476 tcg_out_dsrl(s, TCG_TMP1, TCG_TMP0, 16); 2477 /* t3 = hg00dcba */ 2478 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2479 2480 /* t2 = 0000000f */ 2481 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP1, 0x00ff); 2482 /* t1 = 000000e0 */ 2483 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2484 /* t2 = 00f00000 */ 2485 tcg_out_dsll(s, TCG_TMP2, TCG_TMP2, 40); 2486 /* t1 = 000e0000 */ 2487 tcg_out_dsll(s, TCG_TMP1, TCG_TMP1, 24); 2488 2489 /* t3 = hgf0dcba */ 2490 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2491 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2492 /* t3 = hgfedcba -- delay slot */ 2493 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2494} 2495 2496static void tcg_target_init(TCGContext *s) 2497{ 2498 tcg_target_detect_isa(); 2499 tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffff; 2500 if (TCG_TARGET_REG_BITS == 64) { 2501 tcg_target_available_regs[TCG_TYPE_I64] = 0xffffffff; 2502 } 2503 2504 tcg_target_call_clobber_regs = 0; 2505 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_V0); 2506 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_V1); 2507 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A0); 2508 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A1); 2509 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A2); 2510 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A3); 2511 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T0); 2512 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T1); 2513 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T2); 2514 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T3); 2515 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T4); 2516 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T5); 2517 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T6); 2518 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T7); 2519 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T8); 2520 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T9); 2521 2522 s->reserved_regs = 0; 2523 tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO); /* zero register */ 2524 tcg_regset_set_reg(s->reserved_regs, TCG_REG_K0); /* kernel use only */ 2525 tcg_regset_set_reg(s->reserved_regs, TCG_REG_K1); /* kernel use only */ 2526 tcg_regset_set_reg(s->reserved_regs, TCG_TMP0); /* internal use */ 2527 tcg_regset_set_reg(s->reserved_regs, TCG_TMP1); /* internal use */ 2528 tcg_regset_set_reg(s->reserved_regs, TCG_TMP2); /* internal use */ 2529 tcg_regset_set_reg(s->reserved_regs, TCG_TMP3); /* internal use */ 2530 tcg_regset_set_reg(s->reserved_regs, TCG_REG_RA); /* return address */ 2531 tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP); /* stack pointer */ 2532 tcg_regset_set_reg(s->reserved_regs, TCG_REG_GP); /* global pointer */ 2533} 2534 2535typedef struct { 2536 DebugFrameHeader h; 2537 uint8_t fde_def_cfa[4]; 2538 uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2]; 2539} DebugFrame; 2540 2541#define ELF_HOST_MACHINE EM_MIPS 2542/* GDB doesn't appear to require proper setting of ELF_HOST_FLAGS, 2543 which is good because they're really quite complicated for MIPS. */ 2544 2545static const DebugFrame debug_frame = { 2546 .h.cie.len = sizeof(DebugFrameCIE) - 4, /* length after .len member */ 2547 .h.cie.id = -1, 2548 .h.cie.version = 1, 2549 .h.cie.code_align = 1, 2550 .h.cie.data_align = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */ 2551 .h.cie.return_column = TCG_REG_RA, 2552 2553 /* Total FDE size does not include the "len" member. */ 2554 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), 2555 2556 .fde_def_cfa = { 2557 12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */ 2558 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ 2559 (FRAME_SIZE >> 7) 2560 }, 2561 .fde_reg_ofs = { 2562 0x80 + 16, 9, /* DW_CFA_offset, s0, -72 */ 2563 0x80 + 17, 8, /* DW_CFA_offset, s2, -64 */ 2564 0x80 + 18, 7, /* DW_CFA_offset, s3, -56 */ 2565 0x80 + 19, 6, /* DW_CFA_offset, s4, -48 */ 2566 0x80 + 20, 5, /* DW_CFA_offset, s5, -40 */ 2567 0x80 + 21, 4, /* DW_CFA_offset, s6, -32 */ 2568 0x80 + 22, 3, /* DW_CFA_offset, s7, -24 */ 2569 0x80 + 30, 2, /* DW_CFA_offset, s8, -16 */ 2570 0x80 + 31, 1, /* DW_CFA_offset, ra, -8 */ 2571 } 2572}; 2573 2574void tcg_register_jit(const void *buf, size_t buf_size) 2575{ 2576 tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); 2577} 2578