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#include "../tcg-ldst.c.inc" 28#include "../tcg-pool.c.inc" 29 30#if TCG_TARGET_REG_BITS == 32 31# define LO_OFF (HOST_BIG_ENDIAN * 4) 32# define HI_OFF (4 - LO_OFF) 33#else 34/* Assert at compile-time that these values are never used for 64-bit. */ 35# define LO_OFF ({ qemu_build_not_reached(); 0; }) 36# define HI_OFF ({ qemu_build_not_reached(); 0; }) 37#endif 38 39#ifdef CONFIG_DEBUG_TCG 40static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { 41 "zero", 42 "at", 43 "v0", 44 "v1", 45 "a0", 46 "a1", 47 "a2", 48 "a3", 49 "t0", 50 "t1", 51 "t2", 52 "t3", 53 "t4", 54 "t5", 55 "t6", 56 "t7", 57 "s0", 58 "s1", 59 "s2", 60 "s3", 61 "s4", 62 "s5", 63 "s6", 64 "s7", 65 "t8", 66 "t9", 67 "k0", 68 "k1", 69 "gp", 70 "sp", 71 "s8", 72 "ra", 73}; 74#endif 75 76#define TCG_TMP0 TCG_REG_AT 77#define TCG_TMP1 TCG_REG_T9 78#define TCG_TMP2 TCG_REG_T8 79#define TCG_TMP3 TCG_REG_T7 80 81#ifndef CONFIG_SOFTMMU 82#define TCG_GUEST_BASE_REG TCG_REG_S7 83#endif 84#if TCG_TARGET_REG_BITS == 64 85#define TCG_REG_TB TCG_REG_S6 86#else 87#define TCG_REG_TB (qemu_build_not_reached(), TCG_REG_ZERO) 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 TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot) 138{ 139 tcg_debug_assert(kind == TCG_CALL_RET_NORMAL); 140 tcg_debug_assert(slot >= 0 && slot <= 1); 141 return TCG_REG_V0 + slot; 142} 143 144static const tcg_insn_unit *tb_ret_addr; 145static const tcg_insn_unit *bswap32_addr; 146static const tcg_insn_unit *bswap32u_addr; 147static const tcg_insn_unit *bswap64_addr; 148 149static bool reloc_pc16(tcg_insn_unit *src_rw, const tcg_insn_unit *target) 150{ 151 /* Let the compiler perform the right-shift as part of the arithmetic. */ 152 const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); 153 ptrdiff_t disp = target - (src_rx + 1); 154 if (disp == (int16_t)disp) { 155 *src_rw = deposit32(*src_rw, 0, 16, disp); 156 return true; 157 } 158 return false; 159} 160 161static bool patch_reloc(tcg_insn_unit *code_ptr, int type, 162 intptr_t value, intptr_t addend) 163{ 164 value += addend; 165 switch (type) { 166 case R_MIPS_PC16: 167 return reloc_pc16(code_ptr, (const tcg_insn_unit *)value); 168 case R_MIPS_16: 169 if (value != (int16_t)value) { 170 return false; 171 } 172 *code_ptr = deposit32(*code_ptr, 0, 16, value); 173 return true; 174 } 175 g_assert_not_reached(); 176} 177 178#define TCG_CT_CONST_ZERO 0x100 179#define TCG_CT_CONST_U16 0x200 /* Unsigned 16-bit: 0 - 0xffff. */ 180#define TCG_CT_CONST_S16 0x400 /* Signed 16-bit: -32768 - 32767 */ 181#define TCG_CT_CONST_P2M1 0x800 /* Power of 2 minus 1. */ 182#define TCG_CT_CONST_N16 0x1000 /* "Negatable" 16-bit: -32767 - 32767 */ 183#define TCG_CT_CONST_WSZ 0x2000 /* word size */ 184 185#define ALL_GENERAL_REGS 0xffffffffu 186 187static bool is_p2m1(tcg_target_long val) 188{ 189 return val && ((val + 1) & val) == 0; 190} 191 192/* test if a constant matches the constraint */ 193static bool tcg_target_const_match(int64_t val, TCGType type, int ct) 194{ 195 if (ct & TCG_CT_CONST) { 196 return 1; 197 } else if ((ct & TCG_CT_CONST_ZERO) && val == 0) { 198 return 1; 199 } else if ((ct & TCG_CT_CONST_U16) && val == (uint16_t)val) { 200 return 1; 201 } else if ((ct & TCG_CT_CONST_S16) && val == (int16_t)val) { 202 return 1; 203 } else if ((ct & TCG_CT_CONST_N16) && val >= -32767 && val <= 32767) { 204 return 1; 205 } else if ((ct & TCG_CT_CONST_P2M1) 206 && use_mips32r2_instructions && is_p2m1(val)) { 207 return 1; 208 } else if ((ct & TCG_CT_CONST_WSZ) 209 && val == (type == TCG_TYPE_I32 ? 32 : 64)) { 210 return 1; 211 } 212 return 0; 213} 214 215/* instruction opcodes */ 216typedef enum { 217 OPC_J = 002 << 26, 218 OPC_JAL = 003 << 26, 219 OPC_BEQ = 004 << 26, 220 OPC_BNE = 005 << 26, 221 OPC_BLEZ = 006 << 26, 222 OPC_BGTZ = 007 << 26, 223 OPC_ADDIU = 011 << 26, 224 OPC_SLTI = 012 << 26, 225 OPC_SLTIU = 013 << 26, 226 OPC_ANDI = 014 << 26, 227 OPC_ORI = 015 << 26, 228 OPC_XORI = 016 << 26, 229 OPC_LUI = 017 << 26, 230 OPC_BNEL = 025 << 26, 231 OPC_BNEZALC_R6 = 030 << 26, 232 OPC_DADDIU = 031 << 26, 233 OPC_LDL = 032 << 26, 234 OPC_LDR = 033 << 26, 235 OPC_LB = 040 << 26, 236 OPC_LH = 041 << 26, 237 OPC_LWL = 042 << 26, 238 OPC_LW = 043 << 26, 239 OPC_LBU = 044 << 26, 240 OPC_LHU = 045 << 26, 241 OPC_LWR = 046 << 26, 242 OPC_LWU = 047 << 26, 243 OPC_SB = 050 << 26, 244 OPC_SH = 051 << 26, 245 OPC_SWL = 052 << 26, 246 OPC_SW = 053 << 26, 247 OPC_SDL = 054 << 26, 248 OPC_SDR = 055 << 26, 249 OPC_SWR = 056 << 26, 250 OPC_LD = 067 << 26, 251 OPC_SD = 077 << 26, 252 253 OPC_SPECIAL = 000 << 26, 254 OPC_SLL = OPC_SPECIAL | 000, 255 OPC_SRL = OPC_SPECIAL | 002, 256 OPC_ROTR = OPC_SPECIAL | 002 | (1 << 21), 257 OPC_SRA = OPC_SPECIAL | 003, 258 OPC_SLLV = OPC_SPECIAL | 004, 259 OPC_SRLV = OPC_SPECIAL | 006, 260 OPC_ROTRV = OPC_SPECIAL | 006 | 0100, 261 OPC_SRAV = OPC_SPECIAL | 007, 262 OPC_JR_R5 = OPC_SPECIAL | 010, 263 OPC_JALR = OPC_SPECIAL | 011, 264 OPC_MOVZ = OPC_SPECIAL | 012, 265 OPC_MOVN = OPC_SPECIAL | 013, 266 OPC_SYNC = OPC_SPECIAL | 017, 267 OPC_MFHI = OPC_SPECIAL | 020, 268 OPC_MFLO = OPC_SPECIAL | 022, 269 OPC_DSLLV = OPC_SPECIAL | 024, 270 OPC_DSRLV = OPC_SPECIAL | 026, 271 OPC_DROTRV = OPC_SPECIAL | 026 | 0100, 272 OPC_DSRAV = OPC_SPECIAL | 027, 273 OPC_MULT = OPC_SPECIAL | 030, 274 OPC_MUL_R6 = OPC_SPECIAL | 030 | 0200, 275 OPC_MUH = OPC_SPECIAL | 030 | 0300, 276 OPC_MULTU = OPC_SPECIAL | 031, 277 OPC_MULU = OPC_SPECIAL | 031 | 0200, 278 OPC_MUHU = OPC_SPECIAL | 031 | 0300, 279 OPC_DIV = OPC_SPECIAL | 032, 280 OPC_DIV_R6 = OPC_SPECIAL | 032 | 0200, 281 OPC_MOD = OPC_SPECIAL | 032 | 0300, 282 OPC_DIVU = OPC_SPECIAL | 033, 283 OPC_DIVU_R6 = OPC_SPECIAL | 033 | 0200, 284 OPC_MODU = OPC_SPECIAL | 033 | 0300, 285 OPC_DMULT = OPC_SPECIAL | 034, 286 OPC_DMUL = OPC_SPECIAL | 034 | 0200, 287 OPC_DMUH = OPC_SPECIAL | 034 | 0300, 288 OPC_DMULTU = OPC_SPECIAL | 035, 289 OPC_DMULU = OPC_SPECIAL | 035 | 0200, 290 OPC_DMUHU = OPC_SPECIAL | 035 | 0300, 291 OPC_DDIV = OPC_SPECIAL | 036, 292 OPC_DDIV_R6 = OPC_SPECIAL | 036 | 0200, 293 OPC_DMOD = OPC_SPECIAL | 036 | 0300, 294 OPC_DDIVU = OPC_SPECIAL | 037, 295 OPC_DDIVU_R6 = OPC_SPECIAL | 037 | 0200, 296 OPC_DMODU = OPC_SPECIAL | 037 | 0300, 297 OPC_ADDU = OPC_SPECIAL | 041, 298 OPC_SUBU = OPC_SPECIAL | 043, 299 OPC_AND = OPC_SPECIAL | 044, 300 OPC_OR = OPC_SPECIAL | 045, 301 OPC_XOR = OPC_SPECIAL | 046, 302 OPC_NOR = OPC_SPECIAL | 047, 303 OPC_SLT = OPC_SPECIAL | 052, 304 OPC_SLTU = OPC_SPECIAL | 053, 305 OPC_DADDU = OPC_SPECIAL | 055, 306 OPC_DSUBU = OPC_SPECIAL | 057, 307 OPC_SELEQZ = OPC_SPECIAL | 065, 308 OPC_SELNEZ = OPC_SPECIAL | 067, 309 OPC_DSLL = OPC_SPECIAL | 070, 310 OPC_DSRL = OPC_SPECIAL | 072, 311 OPC_DROTR = OPC_SPECIAL | 072 | (1 << 21), 312 OPC_DSRA = OPC_SPECIAL | 073, 313 OPC_DSLL32 = OPC_SPECIAL | 074, 314 OPC_DSRL32 = OPC_SPECIAL | 076, 315 OPC_DROTR32 = OPC_SPECIAL | 076 | (1 << 21), 316 OPC_DSRA32 = OPC_SPECIAL | 077, 317 OPC_CLZ_R6 = OPC_SPECIAL | 0120, 318 OPC_DCLZ_R6 = OPC_SPECIAL | 0122, 319 320 OPC_REGIMM = 001 << 26, 321 OPC_BLTZ = OPC_REGIMM | (000 << 16), 322 OPC_BGEZ = OPC_REGIMM | (001 << 16), 323 324 OPC_SPECIAL2 = 034 << 26, 325 OPC_MUL_R5 = OPC_SPECIAL2 | 002, 326 OPC_CLZ = OPC_SPECIAL2 | 040, 327 OPC_DCLZ = OPC_SPECIAL2 | 044, 328 329 OPC_SPECIAL3 = 037 << 26, 330 OPC_EXT = OPC_SPECIAL3 | 000, 331 OPC_DEXTM = OPC_SPECIAL3 | 001, 332 OPC_DEXTU = OPC_SPECIAL3 | 002, 333 OPC_DEXT = OPC_SPECIAL3 | 003, 334 OPC_INS = OPC_SPECIAL3 | 004, 335 OPC_DINSM = OPC_SPECIAL3 | 005, 336 OPC_DINSU = OPC_SPECIAL3 | 006, 337 OPC_DINS = OPC_SPECIAL3 | 007, 338 OPC_WSBH = OPC_SPECIAL3 | 00240, 339 OPC_DSBH = OPC_SPECIAL3 | 00244, 340 OPC_DSHD = OPC_SPECIAL3 | 00544, 341 OPC_SEB = OPC_SPECIAL3 | 02040, 342 OPC_SEH = OPC_SPECIAL3 | 03040, 343 344 /* MIPS r6 doesn't have JR, JALR should be used instead */ 345 OPC_JR = use_mips32r6_instructions ? OPC_JALR : OPC_JR_R5, 346 347 /* 348 * MIPS r6 replaces MUL with an alternative encoding which is 349 * backwards-compatible at the assembly level. 350 */ 351 OPC_MUL = use_mips32r6_instructions ? OPC_MUL_R6 : OPC_MUL_R5, 352 353 /* MIPS r6 introduced names for weaker variants of SYNC. These are 354 backward compatible to previous architecture revisions. */ 355 OPC_SYNC_WMB = OPC_SYNC | 0x04 << 6, 356 OPC_SYNC_MB = OPC_SYNC | 0x10 << 6, 357 OPC_SYNC_ACQUIRE = OPC_SYNC | 0x11 << 6, 358 OPC_SYNC_RELEASE = OPC_SYNC | 0x12 << 6, 359 OPC_SYNC_RMB = OPC_SYNC | 0x13 << 6, 360 361 /* Aliases for convenience. */ 362 ALIAS_PADD = sizeof(void *) == 4 ? OPC_ADDU : OPC_DADDU, 363 ALIAS_PADDI = sizeof(void *) == 4 ? OPC_ADDIU : OPC_DADDIU, 364} MIPSInsn; 365 366/* 367 * Type reg 368 */ 369static void tcg_out_opc_reg(TCGContext *s, MIPSInsn opc, 370 TCGReg rd, TCGReg rs, TCGReg rt) 371{ 372 int32_t inst; 373 374 inst = opc; 375 inst |= (rs & 0x1F) << 21; 376 inst |= (rt & 0x1F) << 16; 377 inst |= (rd & 0x1F) << 11; 378 tcg_out32(s, inst); 379} 380 381/* 382 * Type immediate 383 */ 384static void tcg_out_opc_imm(TCGContext *s, MIPSInsn opc, 385 TCGReg rt, TCGReg rs, TCGArg imm) 386{ 387 int32_t inst; 388 389 inst = opc; 390 inst |= (rs & 0x1F) << 21; 391 inst |= (rt & 0x1F) << 16; 392 inst |= (imm & 0xffff); 393 tcg_out32(s, inst); 394} 395 396/* 397 * Type bitfield 398 */ 399static void tcg_out_opc_bf(TCGContext *s, MIPSInsn opc, TCGReg rt, 400 TCGReg rs, int msb, int lsb) 401{ 402 int32_t inst; 403 404 inst = opc; 405 inst |= (rs & 0x1F) << 21; 406 inst |= (rt & 0x1F) << 16; 407 inst |= (msb & 0x1F) << 11; 408 inst |= (lsb & 0x1F) << 6; 409 tcg_out32(s, inst); 410} 411 412static void tcg_out_opc_bf64(TCGContext *s, MIPSInsn opc, MIPSInsn opm, 413 MIPSInsn oph, TCGReg rt, TCGReg rs, 414 int msb, int lsb) 415{ 416 if (lsb >= 32) { 417 opc = oph; 418 msb -= 32; 419 lsb -= 32; 420 } else if (msb >= 32) { 421 opc = opm; 422 msb -= 32; 423 } 424 tcg_out_opc_bf(s, opc, rt, rs, msb, lsb); 425} 426 427/* 428 * Type branch 429 */ 430static void tcg_out_opc_br(TCGContext *s, MIPSInsn opc, TCGReg rt, TCGReg rs) 431{ 432 tcg_out_opc_imm(s, opc, rt, rs, 0); 433} 434 435/* 436 * Type sa 437 */ 438static void tcg_out_opc_sa(TCGContext *s, MIPSInsn opc, 439 TCGReg rd, TCGReg rt, TCGArg sa) 440{ 441 int32_t inst; 442 443 inst = opc; 444 inst |= (rt & 0x1F) << 16; 445 inst |= (rd & 0x1F) << 11; 446 inst |= (sa & 0x1F) << 6; 447 tcg_out32(s, inst); 448 449} 450 451static void tcg_out_opc_sa64(TCGContext *s, MIPSInsn opc1, MIPSInsn opc2, 452 TCGReg rd, TCGReg rt, TCGArg sa) 453{ 454 int32_t inst; 455 456 inst = (sa & 32 ? opc2 : opc1); 457 inst |= (rt & 0x1F) << 16; 458 inst |= (rd & 0x1F) << 11; 459 inst |= (sa & 0x1F) << 6; 460 tcg_out32(s, inst); 461} 462 463/* 464 * Type jump. 465 * Returns true if the branch was in range and the insn was emitted. 466 */ 467static bool tcg_out_opc_jmp(TCGContext *s, MIPSInsn opc, const void *target) 468{ 469 uintptr_t dest = (uintptr_t)target; 470 uintptr_t from = (uintptr_t)tcg_splitwx_to_rx(s->code_ptr) + 4; 471 int32_t inst; 472 473 /* The pc-region branch happens within the 256MB region of 474 the delay slot (thus the +4). */ 475 if ((from ^ dest) & -(1 << 28)) { 476 return false; 477 } 478 tcg_debug_assert((dest & 3) == 0); 479 480 inst = opc; 481 inst |= (dest >> 2) & 0x3ffffff; 482 tcg_out32(s, inst); 483 return true; 484} 485 486static void tcg_out_nop(TCGContext *s) 487{ 488 tcg_out32(s, 0); 489} 490 491static void tcg_out_nop_fill(tcg_insn_unit *p, int count) 492{ 493 memset(p, 0, count * sizeof(tcg_insn_unit)); 494} 495 496static void tcg_out_dsll(TCGContext *s, TCGReg rd, TCGReg rt, TCGArg sa) 497{ 498 tcg_out_opc_sa64(s, OPC_DSLL, OPC_DSLL32, rd, rt, sa); 499} 500 501static void tcg_out_dsrl(TCGContext *s, TCGReg rd, TCGReg rt, TCGArg sa) 502{ 503 tcg_out_opc_sa64(s, OPC_DSRL, OPC_DSRL32, rd, rt, sa); 504} 505 506static void tcg_out_dsra(TCGContext *s, TCGReg rd, TCGReg rt, TCGArg sa) 507{ 508 tcg_out_opc_sa64(s, OPC_DSRA, OPC_DSRA32, rd, rt, sa); 509} 510 511static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg) 512{ 513 /* Simple reg-reg move, optimising out the 'do nothing' case */ 514 if (ret != arg) { 515 tcg_out_opc_reg(s, OPC_OR, ret, arg, TCG_REG_ZERO); 516 } 517 return true; 518} 519 520static bool tcg_out_movi_one(TCGContext *s, TCGReg ret, tcg_target_long arg) 521{ 522 if (arg == (int16_t)arg) { 523 tcg_out_opc_imm(s, OPC_ADDIU, ret, TCG_REG_ZERO, arg); 524 return true; 525 } 526 if (arg == (uint16_t)arg) { 527 tcg_out_opc_imm(s, OPC_ORI, ret, TCG_REG_ZERO, arg); 528 return true; 529 } 530 if (arg == (int32_t)arg && (arg & 0xffff) == 0) { 531 tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16); 532 return true; 533 } 534 return false; 535} 536 537static bool tcg_out_movi_two(TCGContext *s, TCGReg ret, tcg_target_long arg) 538{ 539 /* 540 * All signed 32-bit constants are loadable with two immediates, 541 * and everything else requires more work. 542 */ 543 if (arg == (int32_t)arg) { 544 if (!tcg_out_movi_one(s, ret, arg)) { 545 tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16); 546 tcg_out_opc_imm(s, OPC_ORI, ret, ret, arg & 0xffff); 547 } 548 return true; 549 } 550 return false; 551} 552 553static void tcg_out_movi_pool(TCGContext *s, TCGReg ret, 554 tcg_target_long arg, TCGReg tbreg) 555{ 556 new_pool_label(s, arg, R_MIPS_16, s->code_ptr, tcg_tbrel_diff(s, NULL)); 557 tcg_out_opc_imm(s, OPC_LD, ret, tbreg, 0); 558} 559 560static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret, 561 tcg_target_long arg, TCGReg tbreg) 562{ 563 tcg_target_long tmp; 564 int sh, lo; 565 566 if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) { 567 arg = (int32_t)arg; 568 } 569 570 /* Load all 32-bit constants. */ 571 if (tcg_out_movi_two(s, ret, arg)) { 572 return; 573 } 574 assert(TCG_TARGET_REG_BITS == 64); 575 576 /* Load addresses within 2GB of TB with 1 or 3 insns. */ 577 tmp = tcg_tbrel_diff(s, (void *)arg); 578 if (tmp == (int16_t)tmp) { 579 tcg_out_opc_imm(s, OPC_DADDIU, ret, tbreg, tmp); 580 return; 581 } 582 if (tcg_out_movi_two(s, ret, tmp)) { 583 tcg_out_opc_reg(s, OPC_DADDU, ret, ret, tbreg); 584 return; 585 } 586 587 /* 588 * Load bitmasks with a right-shift. This is good for things 589 * like 0x0fff_ffff_ffff_fff0: ADDUI r,0,0xff00 + DSRL r,r,4. 590 * or similarly using LUI. For this to work, bit 31 must be set. 591 */ 592 if (arg > 0 && (int32_t)arg < 0) { 593 sh = clz64(arg); 594 if (tcg_out_movi_one(s, ret, arg << sh)) { 595 tcg_out_dsrl(s, ret, ret, sh); 596 return; 597 } 598 } 599 600 /* 601 * Load slightly larger constants using left-shift. 602 * Limit this sequence to 3 insns to avoid too much expansion. 603 */ 604 sh = ctz64(arg); 605 if (sh && tcg_out_movi_two(s, ret, arg >> sh)) { 606 tcg_out_dsll(s, ret, ret, sh); 607 return; 608 } 609 610 /* 611 * Load slightly larger constants using left-shift and add/or. 612 * Prefer addi with a negative immediate when that would produce 613 * a larger shift. For this to work, bits 15 and 16 must be set. 614 */ 615 lo = arg & 0xffff; 616 if (lo) { 617 if ((arg & 0x18000) == 0x18000) { 618 lo = (int16_t)arg; 619 } 620 tmp = arg - lo; 621 sh = ctz64(tmp); 622 tmp >>= sh; 623 if (tcg_out_movi_one(s, ret, tmp)) { 624 tcg_out_dsll(s, ret, ret, sh); 625 tcg_out_opc_imm(s, lo < 0 ? OPC_DADDIU : OPC_ORI, ret, ret, lo); 626 return; 627 } 628 } 629 630 /* Otherwise, put 64-bit constants into the constant pool. */ 631 tcg_out_movi_pool(s, ret, arg, tbreg); 632} 633 634static void tcg_out_movi(TCGContext *s, TCGType type, 635 TCGReg ret, tcg_target_long arg) 636{ 637 TCGReg tbreg = TCG_TARGET_REG_BITS == 64 ? TCG_REG_TB : 0; 638 tcg_out_movi_int(s, type, ret, arg, tbreg); 639} 640 641static void tcg_out_ext8s(TCGContext *s, TCGType type, TCGReg rd, TCGReg rs) 642{ 643 tcg_debug_assert(TCG_TARGET_HAS_ext8s_i32); 644 tcg_out_opc_reg(s, OPC_SEB, rd, TCG_REG_ZERO, rs); 645} 646 647static void tcg_out_ext8u(TCGContext *s, TCGReg rd, TCGReg rs) 648{ 649 tcg_out_opc_imm(s, OPC_ANDI, rd, rs, 0xff); 650} 651 652static void tcg_out_ext16s(TCGContext *s, TCGType type, TCGReg rd, TCGReg rs) 653{ 654 tcg_debug_assert(TCG_TARGET_HAS_ext16s_i32); 655 tcg_out_opc_reg(s, OPC_SEH, rd, TCG_REG_ZERO, rs); 656} 657 658static void tcg_out_ext16u(TCGContext *s, TCGReg rd, TCGReg rs) 659{ 660 tcg_out_opc_imm(s, OPC_ANDI, rd, rs, 0xffff); 661} 662 663static void tcg_out_ext32s(TCGContext *s, TCGReg rd, TCGReg rs) 664{ 665 tcg_debug_assert(TCG_TARGET_REG_BITS == 64); 666 tcg_out_opc_sa(s, OPC_SLL, rd, rs, 0); 667} 668 669static void tcg_out_exts_i32_i64(TCGContext *s, TCGReg rd, TCGReg rs) 670{ 671 if (rd != rs) { 672 tcg_out_ext32s(s, rd, rs); 673 } 674} 675 676static void tcg_out_extu_i32_i64(TCGContext *s, TCGReg rd, TCGReg rs) 677{ 678 tcg_out_ext32u(s, rd, rs); 679} 680 681static void tcg_out_extrl_i64_i32(TCGContext *s, TCGReg rd, TCGReg rs) 682{ 683 tcg_out_ext32s(s, rd, rs); 684} 685 686static bool tcg_out_xchg(TCGContext *s, TCGType type, TCGReg r1, TCGReg r2) 687{ 688 return false; 689} 690 691static void tcg_out_addi_ptr(TCGContext *s, TCGReg rd, TCGReg rs, 692 tcg_target_long imm) 693{ 694 /* This function is only used for passing structs by reference. */ 695 g_assert_not_reached(); 696} 697 698static void tcg_out_bswap16(TCGContext *s, TCGReg ret, TCGReg arg, int flags) 699{ 700 /* ret and arg can't be register tmp0 */ 701 tcg_debug_assert(ret != TCG_TMP0); 702 tcg_debug_assert(arg != TCG_TMP0); 703 704 /* With arg = abcd: */ 705 if (use_mips32r2_instructions) { 706 tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg); /* badc */ 707 if (flags & TCG_BSWAP_OS) { 708 tcg_out_opc_reg(s, OPC_SEH, ret, 0, ret); /* ssdc */ 709 } else if ((flags & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) { 710 tcg_out_opc_imm(s, OPC_ANDI, ret, ret, 0xffff); /* 00dc */ 711 } 712 return; 713 } 714 715 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP0, arg, 8); /* 0abc */ 716 if (!(flags & TCG_BSWAP_IZ)) { 717 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP0, TCG_TMP0, 0x00ff); /* 000c */ 718 } 719 if (flags & TCG_BSWAP_OS) { 720 tcg_out_opc_sa(s, OPC_SLL, ret, arg, 24); /* d000 */ 721 tcg_out_opc_sa(s, OPC_SRA, ret, ret, 16); /* ssd0 */ 722 } else { 723 tcg_out_opc_sa(s, OPC_SLL, ret, arg, 8); /* bcd0 */ 724 if (flags & TCG_BSWAP_OZ) { 725 tcg_out_opc_imm(s, OPC_ANDI, ret, ret, 0xff00); /* 00d0 */ 726 } 727 } 728 tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_TMP0); /* ssdc */ 729} 730 731static void tcg_out_bswap_subr(TCGContext *s, const tcg_insn_unit *sub) 732{ 733 if (!tcg_out_opc_jmp(s, OPC_JAL, sub)) { 734 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP1, (uintptr_t)sub); 735 tcg_out_opc_reg(s, OPC_JALR, TCG_REG_RA, TCG_TMP1, 0); 736 } 737} 738 739static void tcg_out_bswap32(TCGContext *s, TCGReg ret, TCGReg arg, int flags) 740{ 741 if (use_mips32r2_instructions) { 742 tcg_out_opc_reg(s, OPC_WSBH, ret, 0, arg); 743 tcg_out_opc_sa(s, OPC_ROTR, ret, ret, 16); 744 if (flags & TCG_BSWAP_OZ) { 745 tcg_out_opc_bf(s, OPC_DEXT, ret, ret, 31, 0); 746 } 747 } else { 748 if (flags & TCG_BSWAP_OZ) { 749 tcg_out_bswap_subr(s, bswap32u_addr); 750 } else { 751 tcg_out_bswap_subr(s, bswap32_addr); 752 } 753 /* delay slot -- never omit the insn, like tcg_out_mov might. */ 754 tcg_out_opc_reg(s, OPC_OR, TCG_TMP0, arg, TCG_REG_ZERO); 755 tcg_out_mov(s, TCG_TYPE_I32, ret, TCG_TMP3); 756 } 757} 758 759static void tcg_out_bswap64(TCGContext *s, TCGReg ret, TCGReg arg) 760{ 761 if (use_mips32r2_instructions) { 762 tcg_out_opc_reg(s, OPC_DSBH, ret, 0, arg); 763 tcg_out_opc_reg(s, OPC_DSHD, ret, 0, ret); 764 } else { 765 tcg_out_bswap_subr(s, bswap64_addr); 766 /* delay slot -- never omit the insn, like tcg_out_mov might. */ 767 tcg_out_opc_reg(s, OPC_OR, TCG_TMP0, arg, TCG_REG_ZERO); 768 tcg_out_mov(s, TCG_TYPE_I32, ret, TCG_TMP3); 769 } 770} 771 772static void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg) 773{ 774 tcg_debug_assert(TCG_TARGET_REG_BITS == 64); 775 if (use_mips32r2_instructions) { 776 tcg_out_opc_bf(s, OPC_DEXT, ret, arg, 31, 0); 777 } else { 778 tcg_out_dsll(s, ret, arg, 32); 779 tcg_out_dsrl(s, ret, ret, 32); 780 } 781} 782 783static void tcg_out_ldst(TCGContext *s, MIPSInsn opc, TCGReg data, 784 TCGReg addr, intptr_t ofs) 785{ 786 int16_t lo = ofs; 787 if (ofs != lo) { 788 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, ofs - lo); 789 if (addr != TCG_REG_ZERO) { 790 tcg_out_opc_reg(s, ALIAS_PADD, TCG_TMP0, TCG_TMP0, addr); 791 } 792 addr = TCG_TMP0; 793 } 794 tcg_out_opc_imm(s, opc, data, addr, lo); 795} 796 797static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, 798 TCGReg arg1, intptr_t arg2) 799{ 800 MIPSInsn opc = OPC_LD; 801 if (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32) { 802 opc = OPC_LW; 803 } 804 tcg_out_ldst(s, opc, arg, arg1, arg2); 805} 806 807static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, 808 TCGReg arg1, intptr_t arg2) 809{ 810 MIPSInsn opc = OPC_SD; 811 if (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32) { 812 opc = OPC_SW; 813 } 814 tcg_out_ldst(s, opc, arg, arg1, arg2); 815} 816 817static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, 818 TCGReg base, intptr_t ofs) 819{ 820 if (val == 0) { 821 tcg_out_st(s, type, TCG_REG_ZERO, base, ofs); 822 return true; 823 } 824 return false; 825} 826 827static void tcg_out_addsub2(TCGContext *s, TCGReg rl, TCGReg rh, TCGReg al, 828 TCGReg ah, TCGArg bl, TCGArg bh, bool cbl, 829 bool cbh, bool is_sub) 830{ 831 TCGReg th = TCG_TMP1; 832 833 /* If we have a negative constant such that negating it would 834 make the high part zero, we can (usually) eliminate one insn. */ 835 if (cbl && cbh && bh == -1 && bl != 0) { 836 bl = -bl; 837 bh = 0; 838 is_sub = !is_sub; 839 } 840 841 /* By operating on the high part first, we get to use the final 842 carry operation to move back from the temporary. */ 843 if (!cbh) { 844 tcg_out_opc_reg(s, (is_sub ? OPC_SUBU : OPC_ADDU), th, ah, bh); 845 } else if (bh != 0 || ah == rl) { 846 tcg_out_opc_imm(s, OPC_ADDIU, th, ah, (is_sub ? -bh : bh)); 847 } else { 848 th = ah; 849 } 850 851 /* Note that tcg optimization should eliminate the bl == 0 case. */ 852 if (is_sub) { 853 if (cbl) { 854 tcg_out_opc_imm(s, OPC_SLTIU, TCG_TMP0, al, bl); 855 tcg_out_opc_imm(s, OPC_ADDIU, rl, al, -bl); 856 } else { 857 tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, al, bl); 858 tcg_out_opc_reg(s, OPC_SUBU, rl, al, bl); 859 } 860 tcg_out_opc_reg(s, OPC_SUBU, rh, th, TCG_TMP0); 861 } else { 862 if (cbl) { 863 tcg_out_opc_imm(s, OPC_ADDIU, rl, al, bl); 864 tcg_out_opc_imm(s, OPC_SLTIU, TCG_TMP0, rl, bl); 865 } else if (rl == al && rl == bl) { 866 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP0, al, TCG_TARGET_REG_BITS - 1); 867 tcg_out_opc_reg(s, OPC_ADDU, rl, al, bl); 868 } else { 869 tcg_out_opc_reg(s, OPC_ADDU, rl, al, bl); 870 tcg_out_opc_reg(s, OPC_SLTU, TCG_TMP0, rl, (rl == bl ? al : bl)); 871 } 872 tcg_out_opc_reg(s, OPC_ADDU, rh, th, TCG_TMP0); 873 } 874} 875 876/* Bit 0 set if inversion required; bit 1 set if swapping required. */ 877#define MIPS_CMP_INV 1 878#define MIPS_CMP_SWAP 2 879 880static const uint8_t mips_cmp_map[16] = { 881 [TCG_COND_LT] = 0, 882 [TCG_COND_LTU] = 0, 883 [TCG_COND_GE] = MIPS_CMP_INV, 884 [TCG_COND_GEU] = MIPS_CMP_INV, 885 [TCG_COND_LE] = MIPS_CMP_INV | MIPS_CMP_SWAP, 886 [TCG_COND_LEU] = MIPS_CMP_INV | MIPS_CMP_SWAP, 887 [TCG_COND_GT] = MIPS_CMP_SWAP, 888 [TCG_COND_GTU] = MIPS_CMP_SWAP, 889}; 890 891static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret, 892 TCGReg arg1, TCGReg arg2) 893{ 894 MIPSInsn s_opc = OPC_SLTU; 895 int cmp_map; 896 897 switch (cond) { 898 case TCG_COND_EQ: 899 if (arg2 != 0) { 900 tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); 901 arg1 = ret; 902 } 903 tcg_out_opc_imm(s, OPC_SLTIU, ret, arg1, 1); 904 break; 905 906 case TCG_COND_NE: 907 if (arg2 != 0) { 908 tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2); 909 arg1 = ret; 910 } 911 tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, arg1); 912 break; 913 914 case TCG_COND_LT: 915 case TCG_COND_GE: 916 case TCG_COND_LE: 917 case TCG_COND_GT: 918 s_opc = OPC_SLT; 919 /* FALLTHRU */ 920 921 case TCG_COND_LTU: 922 case TCG_COND_GEU: 923 case TCG_COND_LEU: 924 case TCG_COND_GTU: 925 cmp_map = mips_cmp_map[cond]; 926 if (cmp_map & MIPS_CMP_SWAP) { 927 TCGReg t = arg1; 928 arg1 = arg2; 929 arg2 = t; 930 } 931 tcg_out_opc_reg(s, s_opc, ret, arg1, arg2); 932 if (cmp_map & MIPS_CMP_INV) { 933 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); 934 } 935 break; 936 937 default: 938 g_assert_not_reached(); 939 break; 940 } 941} 942 943static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1, 944 TCGReg arg2, TCGLabel *l) 945{ 946 static const MIPSInsn b_zero[16] = { 947 [TCG_COND_LT] = OPC_BLTZ, 948 [TCG_COND_GT] = OPC_BGTZ, 949 [TCG_COND_LE] = OPC_BLEZ, 950 [TCG_COND_GE] = OPC_BGEZ, 951 }; 952 953 MIPSInsn s_opc = OPC_SLTU; 954 MIPSInsn b_opc; 955 int cmp_map; 956 957 switch (cond) { 958 case TCG_COND_EQ: 959 b_opc = OPC_BEQ; 960 break; 961 case TCG_COND_NE: 962 b_opc = OPC_BNE; 963 break; 964 965 case TCG_COND_LT: 966 case TCG_COND_GT: 967 case TCG_COND_LE: 968 case TCG_COND_GE: 969 if (arg2 == 0) { 970 b_opc = b_zero[cond]; 971 arg2 = arg1; 972 arg1 = 0; 973 break; 974 } 975 s_opc = OPC_SLT; 976 /* FALLTHRU */ 977 978 case TCG_COND_LTU: 979 case TCG_COND_GTU: 980 case TCG_COND_LEU: 981 case TCG_COND_GEU: 982 cmp_map = mips_cmp_map[cond]; 983 if (cmp_map & MIPS_CMP_SWAP) { 984 TCGReg t = arg1; 985 arg1 = arg2; 986 arg2 = t; 987 } 988 tcg_out_opc_reg(s, s_opc, TCG_TMP0, arg1, arg2); 989 b_opc = (cmp_map & MIPS_CMP_INV ? OPC_BEQ : OPC_BNE); 990 arg1 = TCG_TMP0; 991 arg2 = TCG_REG_ZERO; 992 break; 993 994 default: 995 g_assert_not_reached(); 996 break; 997 } 998 999 tcg_out_opc_br(s, b_opc, arg1, arg2); 1000 tcg_out_reloc(s, s->code_ptr - 1, R_MIPS_PC16, l, 0); 1001 tcg_out_nop(s); 1002} 1003 1004static TCGReg tcg_out_reduce_eq2(TCGContext *s, TCGReg tmp0, TCGReg tmp1, 1005 TCGReg al, TCGReg ah, 1006 TCGReg bl, TCGReg bh) 1007{ 1008 /* Merge highpart comparison into AH. */ 1009 if (bh != 0) { 1010 if (ah != 0) { 1011 tcg_out_opc_reg(s, OPC_XOR, tmp0, ah, bh); 1012 ah = tmp0; 1013 } else { 1014 ah = bh; 1015 } 1016 } 1017 /* Merge lowpart comparison into AL. */ 1018 if (bl != 0) { 1019 if (al != 0) { 1020 tcg_out_opc_reg(s, OPC_XOR, tmp1, al, bl); 1021 al = tmp1; 1022 } else { 1023 al = bl; 1024 } 1025 } 1026 /* Merge high and low part comparisons into AL. */ 1027 if (ah != 0) { 1028 if (al != 0) { 1029 tcg_out_opc_reg(s, OPC_OR, tmp0, ah, al); 1030 al = tmp0; 1031 } else { 1032 al = ah; 1033 } 1034 } 1035 return al; 1036} 1037 1038static void tcg_out_setcond2(TCGContext *s, TCGCond cond, TCGReg ret, 1039 TCGReg al, TCGReg ah, TCGReg bl, TCGReg bh) 1040{ 1041 TCGReg tmp0 = TCG_TMP0; 1042 TCGReg tmp1 = ret; 1043 1044 tcg_debug_assert(ret != TCG_TMP0); 1045 if (ret == ah || ret == bh) { 1046 tcg_debug_assert(ret != TCG_TMP1); 1047 tmp1 = TCG_TMP1; 1048 } 1049 1050 switch (cond) { 1051 case TCG_COND_EQ: 1052 case TCG_COND_NE: 1053 tmp1 = tcg_out_reduce_eq2(s, tmp0, tmp1, al, ah, bl, bh); 1054 tcg_out_setcond(s, cond, ret, tmp1, TCG_REG_ZERO); 1055 break; 1056 1057 default: 1058 tcg_out_setcond(s, TCG_COND_EQ, tmp0, ah, bh); 1059 tcg_out_setcond(s, tcg_unsigned_cond(cond), tmp1, al, bl); 1060 tcg_out_opc_reg(s, OPC_AND, tmp1, tmp1, tmp0); 1061 tcg_out_setcond(s, tcg_high_cond(cond), tmp0, ah, bh); 1062 tcg_out_opc_reg(s, OPC_OR, ret, tmp1, tmp0); 1063 break; 1064 } 1065} 1066 1067static void tcg_out_brcond2(TCGContext *s, TCGCond cond, TCGReg al, TCGReg ah, 1068 TCGReg bl, TCGReg bh, TCGLabel *l) 1069{ 1070 TCGCond b_cond = TCG_COND_NE; 1071 TCGReg tmp = TCG_TMP1; 1072 1073 /* With branches, we emit between 4 and 9 insns with 2 or 3 branches. 1074 With setcond, we emit between 3 and 10 insns and only 1 branch, 1075 which ought to get better branch prediction. */ 1076 switch (cond) { 1077 case TCG_COND_EQ: 1078 case TCG_COND_NE: 1079 b_cond = cond; 1080 tmp = tcg_out_reduce_eq2(s, TCG_TMP0, TCG_TMP1, al, ah, bl, bh); 1081 break; 1082 1083 default: 1084 /* Minimize code size by preferring a compare not requiring INV. */ 1085 if (mips_cmp_map[cond] & MIPS_CMP_INV) { 1086 cond = tcg_invert_cond(cond); 1087 b_cond = TCG_COND_EQ; 1088 } 1089 tcg_out_setcond2(s, cond, tmp, al, ah, bl, bh); 1090 break; 1091 } 1092 1093 tcg_out_brcond(s, b_cond, tmp, TCG_REG_ZERO, l); 1094} 1095 1096static void tcg_out_movcond(TCGContext *s, TCGCond cond, TCGReg ret, 1097 TCGReg c1, TCGReg c2, TCGReg v1, TCGReg v2) 1098{ 1099 bool eqz = false; 1100 1101 /* If one of the values is zero, put it last to match SEL*Z instructions */ 1102 if (use_mips32r6_instructions && v1 == 0) { 1103 v1 = v2; 1104 v2 = 0; 1105 cond = tcg_invert_cond(cond); 1106 } 1107 1108 switch (cond) { 1109 case TCG_COND_EQ: 1110 eqz = true; 1111 /* FALLTHRU */ 1112 case TCG_COND_NE: 1113 if (c2 != 0) { 1114 tcg_out_opc_reg(s, OPC_XOR, TCG_TMP0, c1, c2); 1115 c1 = TCG_TMP0; 1116 } 1117 break; 1118 1119 default: 1120 /* Minimize code size by preferring a compare not requiring INV. */ 1121 if (mips_cmp_map[cond] & MIPS_CMP_INV) { 1122 cond = tcg_invert_cond(cond); 1123 eqz = true; 1124 } 1125 tcg_out_setcond(s, cond, TCG_TMP0, c1, c2); 1126 c1 = TCG_TMP0; 1127 break; 1128 } 1129 1130 if (use_mips32r6_instructions) { 1131 MIPSInsn m_opc_t = eqz ? OPC_SELEQZ : OPC_SELNEZ; 1132 MIPSInsn m_opc_f = eqz ? OPC_SELNEZ : OPC_SELEQZ; 1133 1134 if (v2 != 0) { 1135 tcg_out_opc_reg(s, m_opc_f, TCG_TMP1, v2, c1); 1136 } 1137 tcg_out_opc_reg(s, m_opc_t, ret, v1, c1); 1138 if (v2 != 0) { 1139 tcg_out_opc_reg(s, OPC_OR, ret, ret, TCG_TMP1); 1140 } 1141 } else { 1142 MIPSInsn m_opc = eqz ? OPC_MOVZ : OPC_MOVN; 1143 1144 tcg_out_opc_reg(s, m_opc, ret, v1, c1); 1145 1146 /* This should be guaranteed via constraints */ 1147 tcg_debug_assert(v2 == ret); 1148 } 1149} 1150 1151static void tcg_out_call_int(TCGContext *s, const tcg_insn_unit *arg, bool tail) 1152{ 1153 /* 1154 * Note that __mips_abicalls requires the called function's address 1155 * to be loaded into $25 (t9), even if a direct branch is in range. 1156 * 1157 * For n64, always drop the pointer into the constant pool. 1158 * We can re-use helper addresses often and do not want any 1159 * of the longer sequences tcg_out_movi may try. 1160 */ 1161 if (sizeof(uintptr_t) == 8) { 1162 tcg_out_movi_pool(s, TCG_REG_T9, (uintptr_t)arg, TCG_REG_TB); 1163 } else { 1164 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_T9, (uintptr_t)arg); 1165 } 1166 1167 /* But do try a direct branch, allowing the cpu better insn prefetch. */ 1168 if (tail) { 1169 if (!tcg_out_opc_jmp(s, OPC_J, arg)) { 1170 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_T9, 0); 1171 } 1172 } else { 1173 if (!tcg_out_opc_jmp(s, OPC_JAL, arg)) { 1174 tcg_out_opc_reg(s, OPC_JALR, TCG_REG_RA, TCG_REG_T9, 0); 1175 } 1176 } 1177} 1178 1179static void tcg_out_call(TCGContext *s, const tcg_insn_unit *arg, 1180 const TCGHelperInfo *info) 1181{ 1182 tcg_out_call_int(s, arg, false); 1183 tcg_out_nop(s); 1184} 1185 1186/* We have four temps, we might as well expose three of them. */ 1187static const TCGLdstHelperParam ldst_helper_param = { 1188 .ntmp = 3, .tmp = { TCG_TMP0, TCG_TMP1, TCG_TMP2 } 1189}; 1190 1191static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l) 1192{ 1193 const tcg_insn_unit *tgt_rx = tcg_splitwx_to_rx(s->code_ptr); 1194 MemOp opc = get_memop(l->oi); 1195 1196 /* resolve label address */ 1197 if (!reloc_pc16(l->label_ptr[0], tgt_rx) 1198 || (l->label_ptr[1] && !reloc_pc16(l->label_ptr[1], tgt_rx))) { 1199 return false; 1200 } 1201 1202 tcg_out_ld_helper_args(s, l, &ldst_helper_param); 1203 1204 tcg_out_call_int(s, qemu_ld_helpers[opc & MO_SSIZE], false); 1205 /* delay slot */ 1206 tcg_out_nop(s); 1207 1208 tcg_out_ld_helper_ret(s, l, true, &ldst_helper_param); 1209 1210 tcg_out_opc_br(s, OPC_BEQ, TCG_REG_ZERO, TCG_REG_ZERO); 1211 if (!reloc_pc16(s->code_ptr - 1, l->raddr)) { 1212 return false; 1213 } 1214 1215 /* delay slot */ 1216 tcg_out_nop(s); 1217 return true; 1218} 1219 1220static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) 1221{ 1222 const tcg_insn_unit *tgt_rx = tcg_splitwx_to_rx(s->code_ptr); 1223 MemOp opc = get_memop(l->oi); 1224 1225 /* resolve label address */ 1226 if (!reloc_pc16(l->label_ptr[0], tgt_rx) 1227 || (l->label_ptr[1] && !reloc_pc16(l->label_ptr[1], tgt_rx))) { 1228 return false; 1229 } 1230 1231 tcg_out_st_helper_args(s, l, &ldst_helper_param); 1232 1233 tcg_out_call_int(s, qemu_st_helpers[opc & MO_SIZE], false); 1234 /* delay slot */ 1235 tcg_out_nop(s); 1236 1237 tcg_out_opc_br(s, OPC_BEQ, TCG_REG_ZERO, TCG_REG_ZERO); 1238 if (!reloc_pc16(s->code_ptr - 1, l->raddr)) { 1239 return false; 1240 } 1241 1242 /* delay slot */ 1243 tcg_out_nop(s); 1244 return true; 1245} 1246 1247typedef struct { 1248 TCGReg base; 1249 TCGAtomAlign aa; 1250} HostAddress; 1251 1252bool tcg_target_has_memory_bswap(MemOp memop) 1253{ 1254 return false; 1255} 1256 1257/* We expect to use a 16-bit negative offset from ENV. */ 1258#define MIN_TLB_MASK_TABLE_OFS -32768 1259 1260/* 1261 * For softmmu, perform the TLB load and compare. 1262 * For useronly, perform any required alignment tests. 1263 * In both cases, return a TCGLabelQemuLdst structure if the slow path 1264 * is required and fill in @h with the host address for the fast path. 1265 */ 1266static TCGLabelQemuLdst *prepare_host_addr(TCGContext *s, HostAddress *h, 1267 TCGReg addrlo, TCGReg addrhi, 1268 MemOpIdx oi, bool is_ld) 1269{ 1270 TCGType addr_type = s->addr_type; 1271 TCGLabelQemuLdst *ldst = NULL; 1272 MemOp opc = get_memop(oi); 1273 MemOp a_bits; 1274 unsigned s_bits = opc & MO_SIZE; 1275 unsigned a_mask; 1276 TCGReg base; 1277 1278 h->aa = atom_and_align_for_opc(s, opc, MO_ATOM_IFALIGN, false); 1279 a_bits = h->aa.align; 1280 a_mask = (1 << a_bits) - 1; 1281 1282#ifdef CONFIG_SOFTMMU 1283 unsigned s_mask = (1 << s_bits) - 1; 1284 int mem_index = get_mmuidx(oi); 1285 int fast_off = tlb_mask_table_ofs(s, mem_index); 1286 int mask_off = fast_off + offsetof(CPUTLBDescFast, mask); 1287 int table_off = fast_off + offsetof(CPUTLBDescFast, table); 1288 int add_off = offsetof(CPUTLBEntry, addend); 1289 int cmp_off = is_ld ? offsetof(CPUTLBEntry, addr_read) 1290 : offsetof(CPUTLBEntry, addr_write); 1291 1292 ldst = new_ldst_label(s); 1293 ldst->is_ld = is_ld; 1294 ldst->oi = oi; 1295 ldst->addrlo_reg = addrlo; 1296 ldst->addrhi_reg = addrhi; 1297 1298 /* Load tlb_mask[mmu_idx] and tlb_table[mmu_idx]. */ 1299 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP0, TCG_AREG0, mask_off); 1300 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP1, TCG_AREG0, table_off); 1301 1302 /* Extract the TLB index from the address into TMP3. */ 1303 if (TCG_TARGET_REG_BITS == 32 || addr_type == TCG_TYPE_I32) { 1304 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP3, addrlo, 1305 s->page_bits - CPU_TLB_ENTRY_BITS); 1306 } else { 1307 tcg_out_dsrl(s, TCG_TMP3, addrlo, 1308 s->page_bits - CPU_TLB_ENTRY_BITS); 1309 } 1310 tcg_out_opc_reg(s, OPC_AND, TCG_TMP3, TCG_TMP3, TCG_TMP0); 1311 1312 /* Add the tlb_table pointer, creating the CPUTLBEntry address in TMP3. */ 1313 tcg_out_opc_reg(s, ALIAS_PADD, TCG_TMP3, TCG_TMP3, TCG_TMP1); 1314 1315 if (TCG_TARGET_REG_BITS == 32 || addr_type == TCG_TYPE_I32) { 1316 /* Load the (low half) tlb comparator. */ 1317 tcg_out_ld(s, TCG_TYPE_I32, TCG_TMP0, TCG_TMP3, 1318 cmp_off + HOST_BIG_ENDIAN * 4); 1319 } else { 1320 tcg_out_ld(s, TCG_TYPE_I64, TCG_TMP0, TCG_TMP3, cmp_off); 1321 } 1322 1323 if (TCG_TARGET_REG_BITS == 64 || addr_type == TCG_TYPE_I32) { 1324 /* Load the tlb addend for the fast path. */ 1325 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP3, TCG_TMP3, add_off); 1326 } 1327 1328 /* 1329 * Mask the page bits, keeping the alignment bits to compare against. 1330 * For unaligned accesses, compare against the end of the access to 1331 * verify that it does not cross a page boundary. 1332 */ 1333 tcg_out_movi(s, addr_type, TCG_TMP1, s->page_mask | a_mask); 1334 if (a_mask < s_mask) { 1335 if (TCG_TARGET_REG_BITS == 32 || addr_type == TCG_TYPE_I32) { 1336 tcg_out_opc_imm(s, OPC_ADDIU, TCG_TMP2, addrlo, s_mask - a_mask); 1337 } else { 1338 tcg_out_opc_imm(s, OPC_DADDIU, TCG_TMP2, addrlo, s_mask - a_mask); 1339 } 1340 tcg_out_opc_reg(s, OPC_AND, TCG_TMP1, TCG_TMP1, TCG_TMP2); 1341 } else { 1342 tcg_out_opc_reg(s, OPC_AND, TCG_TMP1, TCG_TMP1, addrlo); 1343 } 1344 1345 /* Zero extend a 32-bit guest address for a 64-bit host. */ 1346 if (TCG_TARGET_REG_BITS == 64 && addr_type == TCG_TYPE_I32) { 1347 tcg_out_ext32u(s, TCG_TMP2, addrlo); 1348 addrlo = TCG_TMP2; 1349 } 1350 1351 ldst->label_ptr[0] = s->code_ptr; 1352 tcg_out_opc_br(s, OPC_BNE, TCG_TMP1, TCG_TMP0); 1353 1354 /* Load and test the high half tlb comparator. */ 1355 if (TCG_TARGET_REG_BITS == 32 && addr_type != TCG_TYPE_I32) { 1356 /* delay slot */ 1357 tcg_out_ldst(s, OPC_LW, TCG_TMP0, TCG_TMP3, cmp_off + HI_OFF); 1358 1359 /* Load the tlb addend for the fast path. */ 1360 tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP3, TCG_TMP3, add_off); 1361 1362 ldst->label_ptr[1] = s->code_ptr; 1363 tcg_out_opc_br(s, OPC_BNE, addrhi, TCG_TMP0); 1364 } 1365 1366 /* delay slot */ 1367 base = TCG_TMP3; 1368 tcg_out_opc_reg(s, ALIAS_PADD, base, TCG_TMP3, addrlo); 1369#else 1370 if (a_mask && (use_mips32r6_instructions || a_bits != s_bits)) { 1371 ldst = new_ldst_label(s); 1372 1373 ldst->is_ld = is_ld; 1374 ldst->oi = oi; 1375 ldst->addrlo_reg = addrlo; 1376 ldst->addrhi_reg = addrhi; 1377 1378 /* We are expecting a_bits to max out at 7, much lower than ANDI. */ 1379 tcg_debug_assert(a_bits < 16); 1380 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP0, addrlo, a_mask); 1381 1382 ldst->label_ptr[0] = s->code_ptr; 1383 if (use_mips32r6_instructions) { 1384 tcg_out_opc_br(s, OPC_BNEZALC_R6, TCG_REG_ZERO, TCG_TMP0); 1385 } else { 1386 tcg_out_opc_br(s, OPC_BNEL, TCG_TMP0, TCG_REG_ZERO); 1387 tcg_out_nop(s); 1388 } 1389 } 1390 1391 base = addrlo; 1392 if (TCG_TARGET_REG_BITS == 64 && addr_type == TCG_TYPE_I32) { 1393 tcg_out_ext32u(s, TCG_REG_A0, base); 1394 base = TCG_REG_A0; 1395 } 1396 if (guest_base) { 1397 if (guest_base == (int16_t)guest_base) { 1398 tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_A0, base, guest_base); 1399 } else { 1400 tcg_out_opc_reg(s, ALIAS_PADD, TCG_REG_A0, base, 1401 TCG_GUEST_BASE_REG); 1402 } 1403 base = TCG_REG_A0; 1404 } 1405#endif 1406 1407 h->base = base; 1408 return ldst; 1409} 1410 1411static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg lo, TCGReg hi, 1412 TCGReg base, MemOp opc, TCGType type) 1413{ 1414 switch (opc & MO_SSIZE) { 1415 case MO_UB: 1416 tcg_out_opc_imm(s, OPC_LBU, lo, base, 0); 1417 break; 1418 case MO_SB: 1419 tcg_out_opc_imm(s, OPC_LB, lo, base, 0); 1420 break; 1421 case MO_UW: 1422 tcg_out_opc_imm(s, OPC_LHU, lo, base, 0); 1423 break; 1424 case MO_SW: 1425 tcg_out_opc_imm(s, OPC_LH, lo, base, 0); 1426 break; 1427 case MO_UL: 1428 if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I64) { 1429 tcg_out_opc_imm(s, OPC_LWU, lo, base, 0); 1430 break; 1431 } 1432 /* FALLTHRU */ 1433 case MO_SL: 1434 tcg_out_opc_imm(s, OPC_LW, lo, base, 0); 1435 break; 1436 case MO_UQ: 1437 /* Prefer to load from offset 0 first, but allow for overlap. */ 1438 if (TCG_TARGET_REG_BITS == 64) { 1439 tcg_out_opc_imm(s, OPC_LD, lo, base, 0); 1440 } else if (HOST_BIG_ENDIAN ? hi != base : lo == base) { 1441 tcg_out_opc_imm(s, OPC_LW, hi, base, HI_OFF); 1442 tcg_out_opc_imm(s, OPC_LW, lo, base, LO_OFF); 1443 } else { 1444 tcg_out_opc_imm(s, OPC_LW, lo, base, LO_OFF); 1445 tcg_out_opc_imm(s, OPC_LW, hi, base, HI_OFF); 1446 } 1447 break; 1448 default: 1449 g_assert_not_reached(); 1450 } 1451} 1452 1453static void tcg_out_qemu_ld_unalign(TCGContext *s, TCGReg lo, TCGReg hi, 1454 TCGReg base, MemOp opc, TCGType type) 1455{ 1456 const MIPSInsn lw1 = HOST_BIG_ENDIAN ? OPC_LWL : OPC_LWR; 1457 const MIPSInsn lw2 = HOST_BIG_ENDIAN ? OPC_LWR : OPC_LWL; 1458 const MIPSInsn ld1 = HOST_BIG_ENDIAN ? OPC_LDL : OPC_LDR; 1459 const MIPSInsn ld2 = HOST_BIG_ENDIAN ? OPC_LDR : OPC_LDL; 1460 bool sgn = opc & MO_SIGN; 1461 1462 switch (opc & MO_SIZE) { 1463 case MO_16: 1464 if (HOST_BIG_ENDIAN) { 1465 tcg_out_opc_imm(s, sgn ? OPC_LB : OPC_LBU, TCG_TMP0, base, 0); 1466 tcg_out_opc_imm(s, OPC_LBU, lo, base, 1); 1467 if (use_mips32r2_instructions) { 1468 tcg_out_opc_bf(s, OPC_INS, lo, TCG_TMP0, 31, 8); 1469 } else { 1470 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP0, TCG_TMP0, 8); 1471 tcg_out_opc_reg(s, OPC_OR, lo, lo, TCG_TMP0); 1472 } 1473 } else if (use_mips32r2_instructions && lo != base) { 1474 tcg_out_opc_imm(s, OPC_LBU, lo, base, 0); 1475 tcg_out_opc_imm(s, sgn ? OPC_LB : OPC_LBU, TCG_TMP0, base, 1); 1476 tcg_out_opc_bf(s, OPC_INS, lo, TCG_TMP0, 31, 8); 1477 } else { 1478 tcg_out_opc_imm(s, OPC_LBU, TCG_TMP0, base, 0); 1479 tcg_out_opc_imm(s, sgn ? OPC_LB : OPC_LBU, TCG_TMP1, base, 1); 1480 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP1, TCG_TMP1, 8); 1481 tcg_out_opc_reg(s, OPC_OR, lo, TCG_TMP0, TCG_TMP1); 1482 } 1483 break; 1484 1485 case MO_32: 1486 tcg_out_opc_imm(s, lw1, lo, base, 0); 1487 tcg_out_opc_imm(s, lw2, lo, base, 3); 1488 if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I64 && !sgn) { 1489 tcg_out_ext32u(s, lo, lo); 1490 } 1491 break; 1492 1493 case MO_64: 1494 if (TCG_TARGET_REG_BITS == 64) { 1495 tcg_out_opc_imm(s, ld1, lo, base, 0); 1496 tcg_out_opc_imm(s, ld2, lo, base, 7); 1497 } else { 1498 tcg_out_opc_imm(s, lw1, HOST_BIG_ENDIAN ? hi : lo, base, 0 + 0); 1499 tcg_out_opc_imm(s, lw2, HOST_BIG_ENDIAN ? hi : lo, base, 0 + 3); 1500 tcg_out_opc_imm(s, lw1, HOST_BIG_ENDIAN ? lo : hi, base, 4 + 0); 1501 tcg_out_opc_imm(s, lw2, HOST_BIG_ENDIAN ? lo : hi, base, 4 + 3); 1502 } 1503 break; 1504 1505 default: 1506 g_assert_not_reached(); 1507 } 1508} 1509 1510static void tcg_out_qemu_ld(TCGContext *s, TCGReg datalo, TCGReg datahi, 1511 TCGReg addrlo, TCGReg addrhi, 1512 MemOpIdx oi, TCGType data_type) 1513{ 1514 MemOp opc = get_memop(oi); 1515 TCGLabelQemuLdst *ldst; 1516 HostAddress h; 1517 1518 ldst = prepare_host_addr(s, &h, addrlo, addrhi, oi, true); 1519 1520 if (use_mips32r6_instructions || h.aa.align >= (opc & MO_SIZE)) { 1521 tcg_out_qemu_ld_direct(s, datalo, datahi, h.base, opc, data_type); 1522 } else { 1523 tcg_out_qemu_ld_unalign(s, datalo, datahi, h.base, opc, data_type); 1524 } 1525 1526 if (ldst) { 1527 ldst->type = data_type; 1528 ldst->datalo_reg = datalo; 1529 ldst->datahi_reg = datahi; 1530 ldst->raddr = tcg_splitwx_to_rx(s->code_ptr); 1531 } 1532} 1533 1534static void tcg_out_qemu_st_direct(TCGContext *s, TCGReg lo, TCGReg hi, 1535 TCGReg base, MemOp opc) 1536{ 1537 switch (opc & MO_SIZE) { 1538 case MO_8: 1539 tcg_out_opc_imm(s, OPC_SB, lo, base, 0); 1540 break; 1541 case MO_16: 1542 tcg_out_opc_imm(s, OPC_SH, lo, base, 0); 1543 break; 1544 case MO_32: 1545 tcg_out_opc_imm(s, OPC_SW, lo, base, 0); 1546 break; 1547 case MO_64: 1548 if (TCG_TARGET_REG_BITS == 64) { 1549 tcg_out_opc_imm(s, OPC_SD, lo, base, 0); 1550 } else { 1551 tcg_out_opc_imm(s, OPC_SW, HOST_BIG_ENDIAN ? hi : lo, base, 0); 1552 tcg_out_opc_imm(s, OPC_SW, HOST_BIG_ENDIAN ? lo : hi, base, 4); 1553 } 1554 break; 1555 default: 1556 g_assert_not_reached(); 1557 } 1558} 1559 1560static void tcg_out_qemu_st_unalign(TCGContext *s, TCGReg lo, TCGReg hi, 1561 TCGReg base, MemOp opc) 1562{ 1563 const MIPSInsn sw1 = HOST_BIG_ENDIAN ? OPC_SWL : OPC_SWR; 1564 const MIPSInsn sw2 = HOST_BIG_ENDIAN ? OPC_SWR : OPC_SWL; 1565 const MIPSInsn sd1 = HOST_BIG_ENDIAN ? OPC_SDL : OPC_SDR; 1566 const MIPSInsn sd2 = HOST_BIG_ENDIAN ? OPC_SDR : OPC_SDL; 1567 1568 switch (opc & MO_SIZE) { 1569 case MO_16: 1570 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP0, lo, 8); 1571 tcg_out_opc_imm(s, OPC_SB, HOST_BIG_ENDIAN ? TCG_TMP0 : lo, base, 0); 1572 tcg_out_opc_imm(s, OPC_SB, HOST_BIG_ENDIAN ? lo : TCG_TMP0, base, 1); 1573 break; 1574 1575 case MO_32: 1576 tcg_out_opc_imm(s, sw1, lo, base, 0); 1577 tcg_out_opc_imm(s, sw2, lo, base, 3); 1578 break; 1579 1580 case MO_64: 1581 if (TCG_TARGET_REG_BITS == 64) { 1582 tcg_out_opc_imm(s, sd1, lo, base, 0); 1583 tcg_out_opc_imm(s, sd2, lo, base, 7); 1584 } else { 1585 tcg_out_opc_imm(s, sw1, HOST_BIG_ENDIAN ? hi : lo, base, 0 + 0); 1586 tcg_out_opc_imm(s, sw2, HOST_BIG_ENDIAN ? hi : lo, base, 0 + 3); 1587 tcg_out_opc_imm(s, sw1, HOST_BIG_ENDIAN ? lo : hi, base, 4 + 0); 1588 tcg_out_opc_imm(s, sw2, HOST_BIG_ENDIAN ? lo : hi, base, 4 + 3); 1589 } 1590 break; 1591 1592 default: 1593 g_assert_not_reached(); 1594 } 1595} 1596 1597static void tcg_out_qemu_st(TCGContext *s, TCGReg datalo, TCGReg datahi, 1598 TCGReg addrlo, TCGReg addrhi, 1599 MemOpIdx oi, TCGType data_type) 1600{ 1601 MemOp opc = get_memop(oi); 1602 TCGLabelQemuLdst *ldst; 1603 HostAddress h; 1604 1605 ldst = prepare_host_addr(s, &h, addrlo, addrhi, oi, false); 1606 1607 if (use_mips32r6_instructions || h.aa.align >= (opc & MO_SIZE)) { 1608 tcg_out_qemu_st_direct(s, datalo, datahi, h.base, opc); 1609 } else { 1610 tcg_out_qemu_st_unalign(s, datalo, datahi, h.base, opc); 1611 } 1612 1613 if (ldst) { 1614 ldst->type = data_type; 1615 ldst->datalo_reg = datalo; 1616 ldst->datahi_reg = datahi; 1617 ldst->raddr = tcg_splitwx_to_rx(s->code_ptr); 1618 } 1619} 1620 1621static void tcg_out_mb(TCGContext *s, TCGArg a0) 1622{ 1623 static const MIPSInsn sync[] = { 1624 /* Note that SYNC_MB is a slightly weaker than SYNC 0, 1625 as the former is an ordering barrier and the latter 1626 is a completion barrier. */ 1627 [0 ... TCG_MO_ALL] = OPC_SYNC_MB, 1628 [TCG_MO_LD_LD] = OPC_SYNC_RMB, 1629 [TCG_MO_ST_ST] = OPC_SYNC_WMB, 1630 [TCG_MO_LD_ST] = OPC_SYNC_RELEASE, 1631 [TCG_MO_LD_ST | TCG_MO_ST_ST] = OPC_SYNC_RELEASE, 1632 [TCG_MO_LD_ST | TCG_MO_LD_LD] = OPC_SYNC_ACQUIRE, 1633 }; 1634 tcg_out32(s, sync[a0 & TCG_MO_ALL]); 1635} 1636 1637static void tcg_out_clz(TCGContext *s, MIPSInsn opcv2, MIPSInsn opcv6, 1638 int width, TCGReg a0, TCGReg a1, TCGArg a2) 1639{ 1640 if (use_mips32r6_instructions) { 1641 if (a2 == width) { 1642 tcg_out_opc_reg(s, opcv6, a0, a1, 0); 1643 } else { 1644 tcg_out_opc_reg(s, opcv6, TCG_TMP0, a1, 0); 1645 tcg_out_movcond(s, TCG_COND_EQ, a0, a1, 0, a2, TCG_TMP0); 1646 } 1647 } else { 1648 if (a2 == width) { 1649 tcg_out_opc_reg(s, opcv2, a0, a1, a1); 1650 } else if (a0 == a2) { 1651 tcg_out_opc_reg(s, opcv2, TCG_TMP0, a1, a1); 1652 tcg_out_opc_reg(s, OPC_MOVN, a0, TCG_TMP0, a1); 1653 } else if (a0 != a1) { 1654 tcg_out_opc_reg(s, opcv2, a0, a1, a1); 1655 tcg_out_opc_reg(s, OPC_MOVZ, a0, a2, a1); 1656 } else { 1657 tcg_out_opc_reg(s, opcv2, TCG_TMP0, a1, a1); 1658 tcg_out_opc_reg(s, OPC_MOVZ, TCG_TMP0, a2, a1); 1659 tcg_out_mov(s, TCG_TYPE_REG, a0, TCG_TMP0); 1660 } 1661 } 1662} 1663 1664static void tcg_out_exit_tb(TCGContext *s, uintptr_t a0) 1665{ 1666 TCGReg base = TCG_REG_ZERO; 1667 int16_t lo = 0; 1668 1669 if (a0) { 1670 intptr_t ofs; 1671 if (TCG_TARGET_REG_BITS == 64) { 1672 ofs = tcg_tbrel_diff(s, (void *)a0); 1673 lo = ofs; 1674 if (ofs == lo) { 1675 base = TCG_REG_TB; 1676 } else { 1677 base = TCG_REG_V0; 1678 tcg_out_movi(s, TCG_TYPE_PTR, base, ofs - lo); 1679 tcg_out_opc_reg(s, ALIAS_PADD, base, base, TCG_REG_TB); 1680 } 1681 } else { 1682 ofs = a0; 1683 lo = ofs; 1684 base = TCG_REG_V0; 1685 tcg_out_movi(s, TCG_TYPE_PTR, base, ofs - lo); 1686 } 1687 } 1688 if (!tcg_out_opc_jmp(s, OPC_J, tb_ret_addr)) { 1689 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, (uintptr_t)tb_ret_addr); 1690 tcg_out_opc_reg(s, OPC_JR, 0, TCG_TMP0, 0); 1691 } 1692 /* delay slot */ 1693 tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_V0, base, lo); 1694} 1695 1696static void tcg_out_goto_tb(TCGContext *s, int which) 1697{ 1698 intptr_t ofs = get_jmp_target_addr(s, which); 1699 TCGReg base, dest; 1700 1701 /* indirect jump method */ 1702 if (TCG_TARGET_REG_BITS == 64) { 1703 dest = TCG_REG_TB; 1704 base = TCG_REG_TB; 1705 ofs = tcg_tbrel_diff(s, (void *)ofs); 1706 } else { 1707 dest = TCG_TMP0; 1708 base = TCG_REG_ZERO; 1709 } 1710 tcg_out_ld(s, TCG_TYPE_PTR, dest, base, ofs); 1711 tcg_out_opc_reg(s, OPC_JR, 0, dest, 0); 1712 /* delay slot */ 1713 tcg_out_nop(s); 1714 1715 set_jmp_reset_offset(s, which); 1716 if (TCG_TARGET_REG_BITS == 64) { 1717 /* For the unlinked case, need to reset TCG_REG_TB. */ 1718 tcg_out_ldst(s, ALIAS_PADDI, TCG_REG_TB, TCG_REG_TB, 1719 -tcg_current_code_size(s)); 1720 } 1721} 1722 1723void tb_target_set_jmp_target(const TranslationBlock *tb, int n, 1724 uintptr_t jmp_rx, uintptr_t jmp_rw) 1725{ 1726 /* Always indirect, nothing to do */ 1727} 1728 1729static void tcg_out_op(TCGContext *s, TCGOpcode opc, 1730 const TCGArg args[TCG_MAX_OP_ARGS], 1731 const int const_args[TCG_MAX_OP_ARGS]) 1732{ 1733 MIPSInsn i1, i2; 1734 TCGArg a0, a1, a2; 1735 int c2; 1736 1737 /* 1738 * Note that many operands use the constraint set "rZ". 1739 * We make use of the fact that 0 is the ZERO register, 1740 * and hence such cases need not check for const_args. 1741 */ 1742 a0 = args[0]; 1743 a1 = args[1]; 1744 a2 = args[2]; 1745 c2 = const_args[2]; 1746 1747 switch (opc) { 1748 case INDEX_op_goto_ptr: 1749 /* jmp to the given host address (could be epilogue) */ 1750 tcg_out_opc_reg(s, OPC_JR, 0, a0, 0); 1751 if (TCG_TARGET_REG_BITS == 64) { 1752 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_TB, a0); 1753 } else { 1754 tcg_out_nop(s); 1755 } 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 do_unary: 1988 tcg_out_opc_reg(s, i1, a0, TCG_REG_ZERO, a1); 1989 break; 1990 1991 case INDEX_op_bswap16_i32: 1992 case INDEX_op_bswap16_i64: 1993 tcg_out_bswap16(s, a0, a1, a2); 1994 break; 1995 case INDEX_op_bswap32_i32: 1996 tcg_out_bswap32(s, a0, a1, 0); 1997 break; 1998 case INDEX_op_bswap32_i64: 1999 tcg_out_bswap32(s, a0, a1, a2); 2000 break; 2001 case INDEX_op_bswap64_i64: 2002 tcg_out_bswap64(s, a0, a1); 2003 break; 2004 case INDEX_op_extrh_i64_i32: 2005 tcg_out_dsra(s, a0, a1, 32); 2006 break; 2007 2008 case INDEX_op_sar_i32: 2009 i1 = OPC_SRAV, i2 = OPC_SRA; 2010 goto do_shift; 2011 case INDEX_op_shl_i32: 2012 i1 = OPC_SLLV, i2 = OPC_SLL; 2013 goto do_shift; 2014 case INDEX_op_shr_i32: 2015 i1 = OPC_SRLV, i2 = OPC_SRL; 2016 goto do_shift; 2017 case INDEX_op_rotr_i32: 2018 i1 = OPC_ROTRV, i2 = OPC_ROTR; 2019 do_shift: 2020 if (c2) { 2021 tcg_out_opc_sa(s, i2, a0, a1, a2); 2022 break; 2023 } 2024 do_shiftv: 2025 tcg_out_opc_reg(s, i1, a0, a2, a1); 2026 break; 2027 case INDEX_op_rotl_i32: 2028 if (c2) { 2029 tcg_out_opc_sa(s, OPC_ROTR, a0, a1, 32 - a2); 2030 } else { 2031 tcg_out_opc_reg(s, OPC_SUBU, TCG_TMP0, TCG_REG_ZERO, a2); 2032 tcg_out_opc_reg(s, OPC_ROTRV, a0, TCG_TMP0, a1); 2033 } 2034 break; 2035 case INDEX_op_sar_i64: 2036 if (c2) { 2037 tcg_out_dsra(s, a0, a1, a2); 2038 break; 2039 } 2040 i1 = OPC_DSRAV; 2041 goto do_shiftv; 2042 case INDEX_op_shl_i64: 2043 if (c2) { 2044 tcg_out_dsll(s, a0, a1, a2); 2045 break; 2046 } 2047 i1 = OPC_DSLLV; 2048 goto do_shiftv; 2049 case INDEX_op_shr_i64: 2050 if (c2) { 2051 tcg_out_dsrl(s, a0, a1, a2); 2052 break; 2053 } 2054 i1 = OPC_DSRLV; 2055 goto do_shiftv; 2056 case INDEX_op_rotr_i64: 2057 if (c2) { 2058 tcg_out_opc_sa64(s, OPC_DROTR, OPC_DROTR32, a0, a1, a2); 2059 break; 2060 } 2061 i1 = OPC_DROTRV; 2062 goto do_shiftv; 2063 case INDEX_op_rotl_i64: 2064 if (c2) { 2065 tcg_out_opc_sa64(s, OPC_DROTR, OPC_DROTR32, a0, a1, 64 - a2); 2066 } else { 2067 tcg_out_opc_reg(s, OPC_DSUBU, TCG_TMP0, TCG_REG_ZERO, a2); 2068 tcg_out_opc_reg(s, OPC_DROTRV, a0, TCG_TMP0, a1); 2069 } 2070 break; 2071 2072 case INDEX_op_clz_i32: 2073 tcg_out_clz(s, OPC_CLZ, OPC_CLZ_R6, 32, a0, a1, a2); 2074 break; 2075 case INDEX_op_clz_i64: 2076 tcg_out_clz(s, OPC_DCLZ, OPC_DCLZ_R6, 64, a0, a1, a2); 2077 break; 2078 2079 case INDEX_op_deposit_i32: 2080 tcg_out_opc_bf(s, OPC_INS, a0, a2, args[3] + args[4] - 1, args[3]); 2081 break; 2082 case INDEX_op_deposit_i64: 2083 tcg_out_opc_bf64(s, OPC_DINS, OPC_DINSM, OPC_DINSU, a0, a2, 2084 args[3] + args[4] - 1, args[3]); 2085 break; 2086 case INDEX_op_extract_i32: 2087 tcg_out_opc_bf(s, OPC_EXT, a0, a1, args[3] - 1, a2); 2088 break; 2089 case INDEX_op_extract_i64: 2090 tcg_out_opc_bf64(s, OPC_DEXT, OPC_DEXTM, OPC_DEXTU, a0, a1, 2091 args[3] - 1, a2); 2092 break; 2093 2094 case INDEX_op_brcond_i32: 2095 case INDEX_op_brcond_i64: 2096 tcg_out_brcond(s, a2, a0, a1, arg_label(args[3])); 2097 break; 2098 case INDEX_op_brcond2_i32: 2099 tcg_out_brcond2(s, args[4], a0, a1, a2, args[3], arg_label(args[5])); 2100 break; 2101 2102 case INDEX_op_movcond_i32: 2103 case INDEX_op_movcond_i64: 2104 tcg_out_movcond(s, args[5], a0, a1, a2, args[3], args[4]); 2105 break; 2106 2107 case INDEX_op_setcond_i32: 2108 case INDEX_op_setcond_i64: 2109 tcg_out_setcond(s, args[3], a0, a1, a2); 2110 break; 2111 case INDEX_op_setcond2_i32: 2112 tcg_out_setcond2(s, args[5], a0, a1, a2, args[3], args[4]); 2113 break; 2114 2115 case INDEX_op_qemu_ld_a64_i32: 2116 if (TCG_TARGET_REG_BITS == 32) { 2117 tcg_out_qemu_ld(s, a0, 0, a1, a2, args[3], TCG_TYPE_I32); 2118 break; 2119 } 2120 /* fall through */ 2121 case INDEX_op_qemu_ld_a32_i32: 2122 tcg_out_qemu_ld(s, a0, 0, a1, 0, a2, TCG_TYPE_I32); 2123 break; 2124 case INDEX_op_qemu_ld_a32_i64: 2125 if (TCG_TARGET_REG_BITS == 64) { 2126 tcg_out_qemu_ld(s, a0, 0, a1, 0, a2, TCG_TYPE_I64); 2127 } else { 2128 tcg_out_qemu_ld(s, a0, a1, a2, 0, args[3], TCG_TYPE_I64); 2129 } 2130 break; 2131 case INDEX_op_qemu_ld_a64_i64: 2132 if (TCG_TARGET_REG_BITS == 64) { 2133 tcg_out_qemu_ld(s, a0, 0, a1, 0, a2, TCG_TYPE_I64); 2134 } else { 2135 tcg_out_qemu_ld(s, a0, a1, a2, args[3], args[4], TCG_TYPE_I64); 2136 } 2137 break; 2138 2139 case INDEX_op_qemu_st_a64_i32: 2140 if (TCG_TARGET_REG_BITS == 32) { 2141 tcg_out_qemu_st(s, a0, 0, a1, a2, args[3], TCG_TYPE_I32); 2142 break; 2143 } 2144 /* fall through */ 2145 case INDEX_op_qemu_st_a32_i32: 2146 tcg_out_qemu_st(s, a0, 0, a1, 0, a2, TCG_TYPE_I32); 2147 break; 2148 case INDEX_op_qemu_st_a32_i64: 2149 if (TCG_TARGET_REG_BITS == 64) { 2150 tcg_out_qemu_st(s, a0, 0, a1, 0, a2, TCG_TYPE_I64); 2151 } else { 2152 tcg_out_qemu_st(s, a0, a1, a2, 0, args[3], TCG_TYPE_I64); 2153 } 2154 break; 2155 case INDEX_op_qemu_st_a64_i64: 2156 if (TCG_TARGET_REG_BITS == 64) { 2157 tcg_out_qemu_st(s, a0, 0, a1, 0, a2, TCG_TYPE_I64); 2158 } else { 2159 tcg_out_qemu_st(s, a0, a1, a2, args[3], args[4], TCG_TYPE_I64); 2160 } 2161 break; 2162 2163 case INDEX_op_add2_i32: 2164 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], 2165 const_args[4], const_args[5], false); 2166 break; 2167 case INDEX_op_sub2_i32: 2168 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], 2169 const_args[4], const_args[5], true); 2170 break; 2171 2172 case INDEX_op_mb: 2173 tcg_out_mb(s, a0); 2174 break; 2175 case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ 2176 case INDEX_op_mov_i64: 2177 case INDEX_op_call: /* Always emitted via tcg_out_call. */ 2178 case INDEX_op_exit_tb: /* Always emitted via tcg_out_exit_tb. */ 2179 case INDEX_op_goto_tb: /* Always emitted via tcg_out_goto_tb. */ 2180 case INDEX_op_ext8s_i32: /* Always emitted via tcg_reg_alloc_op. */ 2181 case INDEX_op_ext8s_i64: 2182 case INDEX_op_ext8u_i32: 2183 case INDEX_op_ext8u_i64: 2184 case INDEX_op_ext16s_i32: 2185 case INDEX_op_ext16s_i64: 2186 case INDEX_op_ext32s_i64: 2187 case INDEX_op_ext32u_i64: 2188 case INDEX_op_ext_i32_i64: 2189 case INDEX_op_extu_i32_i64: 2190 case INDEX_op_extrl_i64_i32: 2191 default: 2192 g_assert_not_reached(); 2193 } 2194} 2195 2196static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op) 2197{ 2198 switch (op) { 2199 case INDEX_op_goto_ptr: 2200 return C_O0_I1(r); 2201 2202 case INDEX_op_ld8u_i32: 2203 case INDEX_op_ld8s_i32: 2204 case INDEX_op_ld16u_i32: 2205 case INDEX_op_ld16s_i32: 2206 case INDEX_op_ld_i32: 2207 case INDEX_op_not_i32: 2208 case INDEX_op_bswap16_i32: 2209 case INDEX_op_bswap32_i32: 2210 case INDEX_op_ext8s_i32: 2211 case INDEX_op_ext16s_i32: 2212 case INDEX_op_extract_i32: 2213 case INDEX_op_ld8u_i64: 2214 case INDEX_op_ld8s_i64: 2215 case INDEX_op_ld16u_i64: 2216 case INDEX_op_ld16s_i64: 2217 case INDEX_op_ld32s_i64: 2218 case INDEX_op_ld32u_i64: 2219 case INDEX_op_ld_i64: 2220 case INDEX_op_not_i64: 2221 case INDEX_op_bswap16_i64: 2222 case INDEX_op_bswap32_i64: 2223 case INDEX_op_bswap64_i64: 2224 case INDEX_op_ext8s_i64: 2225 case INDEX_op_ext16s_i64: 2226 case INDEX_op_ext32s_i64: 2227 case INDEX_op_ext32u_i64: 2228 case INDEX_op_ext_i32_i64: 2229 case INDEX_op_extu_i32_i64: 2230 case INDEX_op_extrl_i64_i32: 2231 case INDEX_op_extrh_i64_i32: 2232 case INDEX_op_extract_i64: 2233 return C_O1_I1(r, r); 2234 2235 case INDEX_op_st8_i32: 2236 case INDEX_op_st16_i32: 2237 case INDEX_op_st_i32: 2238 case INDEX_op_st8_i64: 2239 case INDEX_op_st16_i64: 2240 case INDEX_op_st32_i64: 2241 case INDEX_op_st_i64: 2242 return C_O0_I2(rZ, r); 2243 2244 case INDEX_op_add_i32: 2245 case INDEX_op_add_i64: 2246 return C_O1_I2(r, r, rJ); 2247 case INDEX_op_sub_i32: 2248 case INDEX_op_sub_i64: 2249 return C_O1_I2(r, rZ, rN); 2250 case INDEX_op_mul_i32: 2251 case INDEX_op_mulsh_i32: 2252 case INDEX_op_muluh_i32: 2253 case INDEX_op_div_i32: 2254 case INDEX_op_divu_i32: 2255 case INDEX_op_rem_i32: 2256 case INDEX_op_remu_i32: 2257 case INDEX_op_nor_i32: 2258 case INDEX_op_setcond_i32: 2259 case INDEX_op_mul_i64: 2260 case INDEX_op_mulsh_i64: 2261 case INDEX_op_muluh_i64: 2262 case INDEX_op_div_i64: 2263 case INDEX_op_divu_i64: 2264 case INDEX_op_rem_i64: 2265 case INDEX_op_remu_i64: 2266 case INDEX_op_nor_i64: 2267 case INDEX_op_setcond_i64: 2268 return C_O1_I2(r, rZ, rZ); 2269 case INDEX_op_muls2_i32: 2270 case INDEX_op_mulu2_i32: 2271 case INDEX_op_muls2_i64: 2272 case INDEX_op_mulu2_i64: 2273 return C_O2_I2(r, r, r, r); 2274 case INDEX_op_and_i32: 2275 case INDEX_op_and_i64: 2276 return C_O1_I2(r, r, rIK); 2277 case INDEX_op_or_i32: 2278 case INDEX_op_xor_i32: 2279 case INDEX_op_or_i64: 2280 case INDEX_op_xor_i64: 2281 return C_O1_I2(r, r, rI); 2282 case INDEX_op_shl_i32: 2283 case INDEX_op_shr_i32: 2284 case INDEX_op_sar_i32: 2285 case INDEX_op_rotr_i32: 2286 case INDEX_op_rotl_i32: 2287 case INDEX_op_shl_i64: 2288 case INDEX_op_shr_i64: 2289 case INDEX_op_sar_i64: 2290 case INDEX_op_rotr_i64: 2291 case INDEX_op_rotl_i64: 2292 return C_O1_I2(r, r, ri); 2293 case INDEX_op_clz_i32: 2294 case INDEX_op_clz_i64: 2295 return C_O1_I2(r, r, rWZ); 2296 2297 case INDEX_op_deposit_i32: 2298 case INDEX_op_deposit_i64: 2299 return C_O1_I2(r, 0, rZ); 2300 case INDEX_op_brcond_i32: 2301 case INDEX_op_brcond_i64: 2302 return C_O0_I2(rZ, rZ); 2303 case INDEX_op_movcond_i32: 2304 case INDEX_op_movcond_i64: 2305 return (use_mips32r6_instructions 2306 ? C_O1_I4(r, rZ, rZ, rZ, rZ) 2307 : C_O1_I4(r, rZ, rZ, rZ, 0)); 2308 case INDEX_op_add2_i32: 2309 case INDEX_op_sub2_i32: 2310 return C_O2_I4(r, r, rZ, rZ, rN, rN); 2311 case INDEX_op_setcond2_i32: 2312 return C_O1_I4(r, rZ, rZ, rZ, rZ); 2313 case INDEX_op_brcond2_i32: 2314 return C_O0_I4(rZ, rZ, rZ, rZ); 2315 2316 case INDEX_op_qemu_ld_a32_i32: 2317 return C_O1_I1(r, r); 2318 case INDEX_op_qemu_ld_a64_i32: 2319 return TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, r) : C_O1_I2(r, r, r); 2320 case INDEX_op_qemu_st_a32_i32: 2321 return C_O0_I2(rZ, r); 2322 case INDEX_op_qemu_st_a64_i32: 2323 return TCG_TARGET_REG_BITS == 64 ? C_O0_I2(rZ, r) : C_O0_I3(rZ, r, r); 2324 case INDEX_op_qemu_ld_a32_i64: 2325 return TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, r) : C_O2_I1(r, r, r); 2326 case INDEX_op_qemu_ld_a64_i64: 2327 return TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, r) : C_O2_I2(r, r, r, r); 2328 case INDEX_op_qemu_st_a32_i64: 2329 return TCG_TARGET_REG_BITS == 64 ? C_O0_I2(rZ, r) : C_O0_I3(rZ, rZ, r); 2330 case INDEX_op_qemu_st_a64_i64: 2331 return (TCG_TARGET_REG_BITS == 64 ? C_O0_I2(rZ, r) 2332 : C_O0_I4(rZ, rZ, r, r)); 2333 2334 default: 2335 g_assert_not_reached(); 2336 } 2337} 2338 2339static const int tcg_target_callee_save_regs[] = { 2340 TCG_REG_S0, 2341 TCG_REG_S1, 2342 TCG_REG_S2, 2343 TCG_REG_S3, 2344 TCG_REG_S4, 2345 TCG_REG_S5, 2346 TCG_REG_S6, /* used for the tb base (TCG_REG_TB) */ 2347 TCG_REG_S7, /* used for guest_base */ 2348 TCG_REG_S8, /* used for the global env (TCG_AREG0) */ 2349 TCG_REG_RA, /* should be last for ABI compliance */ 2350}; 2351 2352/* The Linux kernel doesn't provide any information about the available 2353 instruction set. Probe it using a signal handler. */ 2354 2355 2356#ifndef use_movnz_instructions 2357bool use_movnz_instructions = false; 2358#endif 2359 2360#ifndef use_mips32_instructions 2361bool use_mips32_instructions = false; 2362#endif 2363 2364#ifndef use_mips32r2_instructions 2365bool use_mips32r2_instructions = false; 2366#endif 2367 2368static volatile sig_atomic_t got_sigill; 2369 2370static void sigill_handler(int signo, siginfo_t *si, void *data) 2371{ 2372 /* Skip the faulty instruction */ 2373 ucontext_t *uc = (ucontext_t *)data; 2374 uc->uc_mcontext.pc += 4; 2375 2376 got_sigill = 1; 2377} 2378 2379static void tcg_target_detect_isa(void) 2380{ 2381 struct sigaction sa_old, sa_new; 2382 2383 memset(&sa_new, 0, sizeof(sa_new)); 2384 sa_new.sa_flags = SA_SIGINFO; 2385 sa_new.sa_sigaction = sigill_handler; 2386 sigaction(SIGILL, &sa_new, &sa_old); 2387 2388 /* Probe for movn/movz, necessary to implement movcond. */ 2389#ifndef use_movnz_instructions 2390 got_sigill = 0; 2391 asm volatile(".set push\n" 2392 ".set mips32\n" 2393 "movn $zero, $zero, $zero\n" 2394 "movz $zero, $zero, $zero\n" 2395 ".set pop\n" 2396 : : : ); 2397 use_movnz_instructions = !got_sigill; 2398#endif 2399 2400 /* Probe for MIPS32 instructions. As no subsetting is allowed 2401 by the specification, it is only necessary to probe for one 2402 of the instructions. */ 2403#ifndef use_mips32_instructions 2404 got_sigill = 0; 2405 asm volatile(".set push\n" 2406 ".set mips32\n" 2407 "mul $zero, $zero\n" 2408 ".set pop\n" 2409 : : : ); 2410 use_mips32_instructions = !got_sigill; 2411#endif 2412 2413 /* Probe for MIPS32r2 instructions if MIPS32 instructions are 2414 available. As no subsetting is allowed by the specification, 2415 it is only necessary to probe for one of the instructions. */ 2416#ifndef use_mips32r2_instructions 2417 if (use_mips32_instructions) { 2418 got_sigill = 0; 2419 asm volatile(".set push\n" 2420 ".set mips32r2\n" 2421 "seb $zero, $zero\n" 2422 ".set pop\n" 2423 : : : ); 2424 use_mips32r2_instructions = !got_sigill; 2425 } 2426#endif 2427 2428 sigaction(SIGILL, &sa_old, NULL); 2429} 2430 2431static tcg_insn_unit *align_code_ptr(TCGContext *s) 2432{ 2433 uintptr_t p = (uintptr_t)s->code_ptr; 2434 if (p & 15) { 2435 p = (p + 15) & -16; 2436 s->code_ptr = (void *)p; 2437 } 2438 return s->code_ptr; 2439} 2440 2441/* Stack frame parameters. */ 2442#define REG_SIZE (TCG_TARGET_REG_BITS / 8) 2443#define SAVE_SIZE ((int)ARRAY_SIZE(tcg_target_callee_save_regs) * REG_SIZE) 2444#define TEMP_SIZE (CPU_TEMP_BUF_NLONGS * (int)sizeof(long)) 2445 2446#define FRAME_SIZE ((TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE + SAVE_SIZE \ 2447 + TCG_TARGET_STACK_ALIGN - 1) \ 2448 & -TCG_TARGET_STACK_ALIGN) 2449#define SAVE_OFS (TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE) 2450 2451/* We're expecting to be able to use an immediate for frame allocation. */ 2452QEMU_BUILD_BUG_ON(FRAME_SIZE > 0x7fff); 2453 2454/* Generate global QEMU prologue and epilogue code */ 2455static void tcg_target_qemu_prologue(TCGContext *s) 2456{ 2457 int i; 2458 2459 tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, TEMP_SIZE); 2460 2461 /* TB prologue */ 2462 tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_SP, TCG_REG_SP, -FRAME_SIZE); 2463 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { 2464 tcg_out_st(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], 2465 TCG_REG_SP, SAVE_OFS + i * REG_SIZE); 2466 } 2467 2468#ifndef CONFIG_SOFTMMU 2469 if (guest_base != (int16_t)guest_base) { 2470 /* 2471 * The function call abi for n32 and n64 will have loaded $25 (t9) 2472 * with the address of the prologue, so we can use that instead 2473 * of TCG_REG_TB. 2474 */ 2475#if TCG_TARGET_REG_BITS == 64 && !defined(__mips_abicalls) 2476# error "Unknown mips abi" 2477#endif 2478 tcg_out_movi_int(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base, 2479 TCG_TARGET_REG_BITS == 64 ? TCG_REG_T9 : 0); 2480 tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG); 2481 } 2482#endif 2483 2484 if (TCG_TARGET_REG_BITS == 64) { 2485 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_TB, tcg_target_call_iarg_regs[1]); 2486 } 2487 2488 /* Call generated code */ 2489 tcg_out_opc_reg(s, OPC_JR, 0, tcg_target_call_iarg_regs[1], 0); 2490 /* delay slot */ 2491 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); 2492 2493 /* 2494 * Return path for goto_ptr. Set return value to 0, a-la exit_tb, 2495 * and fall through to the rest of the epilogue. 2496 */ 2497 tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr); 2498 tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_V0, TCG_REG_ZERO); 2499 2500 /* TB epilogue */ 2501 tb_ret_addr = tcg_splitwx_to_rx(s->code_ptr); 2502 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { 2503 tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], 2504 TCG_REG_SP, SAVE_OFS + i * REG_SIZE); 2505 } 2506 2507 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2508 /* delay slot */ 2509 tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE); 2510 2511 if (use_mips32r2_instructions) { 2512 return; 2513 } 2514 2515 /* Bswap subroutines: Input in TCG_TMP0, output in TCG_TMP3; 2516 clobbers TCG_TMP1, TCG_TMP2. */ 2517 2518 /* 2519 * bswap32 -- 32-bit swap (signed result for mips64). a0 = abcd. 2520 */ 2521 bswap32_addr = tcg_splitwx_to_rx(align_code_ptr(s)); 2522 /* t3 = (ssss)d000 */ 2523 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP3, TCG_TMP0, 24); 2524 /* t1 = 000a */ 2525 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP1, TCG_TMP0, 24); 2526 /* t2 = 00c0 */ 2527 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP0, 0xff00); 2528 /* t3 = d00a */ 2529 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2530 /* t1 = 0abc */ 2531 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP1, TCG_TMP0, 8); 2532 /* t2 = 0c00 */ 2533 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP2, TCG_TMP2, 8); 2534 /* t1 = 00b0 */ 2535 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2536 /* t3 = dc0a */ 2537 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2538 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2539 /* t3 = dcba -- delay slot */ 2540 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2541 2542 if (TCG_TARGET_REG_BITS == 32) { 2543 return; 2544 } 2545 2546 /* 2547 * bswap32u -- unsigned 32-bit swap. a0 = ....abcd. 2548 */ 2549 bswap32u_addr = tcg_splitwx_to_rx(align_code_ptr(s)); 2550 /* t1 = (0000)000d */ 2551 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP0, 0xff); 2552 /* t3 = 000a */ 2553 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP3, TCG_TMP0, 24); 2554 /* t1 = (0000)d000 */ 2555 tcg_out_dsll(s, TCG_TMP1, TCG_TMP1, 24); 2556 /* t2 = 00c0 */ 2557 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP0, 0xff00); 2558 /* t3 = d00a */ 2559 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2560 /* t1 = 0abc */ 2561 tcg_out_opc_sa(s, OPC_SRL, TCG_TMP1, TCG_TMP0, 8); 2562 /* t2 = 0c00 */ 2563 tcg_out_opc_sa(s, OPC_SLL, TCG_TMP2, TCG_TMP2, 8); 2564 /* t1 = 00b0 */ 2565 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2566 /* t3 = dc0a */ 2567 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2568 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2569 /* t3 = dcba -- delay slot */ 2570 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2571 2572 /* 2573 * bswap64 -- 64-bit swap. a0 = abcdefgh 2574 */ 2575 bswap64_addr = tcg_splitwx_to_rx(align_code_ptr(s)); 2576 /* t3 = h0000000 */ 2577 tcg_out_dsll(s, TCG_TMP3, TCG_TMP0, 56); 2578 /* t1 = 0000000a */ 2579 tcg_out_dsrl(s, TCG_TMP1, TCG_TMP0, 56); 2580 2581 /* t2 = 000000g0 */ 2582 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP0, 0xff00); 2583 /* t3 = h000000a */ 2584 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2585 /* t1 = 00000abc */ 2586 tcg_out_dsrl(s, TCG_TMP1, TCG_TMP0, 40); 2587 /* t2 = 0g000000 */ 2588 tcg_out_dsll(s, TCG_TMP2, TCG_TMP2, 40); 2589 /* t1 = 000000b0 */ 2590 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2591 2592 /* t3 = hg00000a */ 2593 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2594 /* t2 = 0000abcd */ 2595 tcg_out_dsrl(s, TCG_TMP2, TCG_TMP0, 32); 2596 /* t3 = hg0000ba */ 2597 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2598 2599 /* t1 = 000000c0 */ 2600 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP2, 0xff00); 2601 /* t2 = 0000000d */ 2602 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP2, 0x00ff); 2603 /* t1 = 00000c00 */ 2604 tcg_out_dsll(s, TCG_TMP1, TCG_TMP1, 8); 2605 /* t2 = 0000d000 */ 2606 tcg_out_dsll(s, TCG_TMP2, TCG_TMP2, 24); 2607 2608 /* t3 = hg000cba */ 2609 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2610 /* t1 = 00abcdef */ 2611 tcg_out_dsrl(s, TCG_TMP1, TCG_TMP0, 16); 2612 /* t3 = hg00dcba */ 2613 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2614 2615 /* t2 = 0000000f */ 2616 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP2, TCG_TMP1, 0x00ff); 2617 /* t1 = 000000e0 */ 2618 tcg_out_opc_imm(s, OPC_ANDI, TCG_TMP1, TCG_TMP1, 0xff00); 2619 /* t2 = 00f00000 */ 2620 tcg_out_dsll(s, TCG_TMP2, TCG_TMP2, 40); 2621 /* t1 = 000e0000 */ 2622 tcg_out_dsll(s, TCG_TMP1, TCG_TMP1, 24); 2623 2624 /* t3 = hgf0dcba */ 2625 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP2); 2626 tcg_out_opc_reg(s, OPC_JR, 0, TCG_REG_RA, 0); 2627 /* t3 = hgfedcba -- delay slot */ 2628 tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1); 2629} 2630 2631static void tcg_target_init(TCGContext *s) 2632{ 2633 tcg_target_detect_isa(); 2634 tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffff; 2635 if (TCG_TARGET_REG_BITS == 64) { 2636 tcg_target_available_regs[TCG_TYPE_I64] = 0xffffffff; 2637 } 2638 2639 tcg_target_call_clobber_regs = 0; 2640 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_V0); 2641 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_V1); 2642 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A0); 2643 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A1); 2644 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A2); 2645 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_A3); 2646 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T0); 2647 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T1); 2648 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T2); 2649 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T3); 2650 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T4); 2651 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T5); 2652 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T6); 2653 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T7); 2654 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T8); 2655 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_T9); 2656 2657 s->reserved_regs = 0; 2658 tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO); /* zero register */ 2659 tcg_regset_set_reg(s->reserved_regs, TCG_REG_K0); /* kernel use only */ 2660 tcg_regset_set_reg(s->reserved_regs, TCG_REG_K1); /* kernel use only */ 2661 tcg_regset_set_reg(s->reserved_regs, TCG_TMP0); /* internal use */ 2662 tcg_regset_set_reg(s->reserved_regs, TCG_TMP1); /* internal use */ 2663 tcg_regset_set_reg(s->reserved_regs, TCG_TMP2); /* internal use */ 2664 tcg_regset_set_reg(s->reserved_regs, TCG_TMP3); /* internal use */ 2665 tcg_regset_set_reg(s->reserved_regs, TCG_REG_RA); /* return address */ 2666 tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP); /* stack pointer */ 2667 tcg_regset_set_reg(s->reserved_regs, TCG_REG_GP); /* global pointer */ 2668 if (TCG_TARGET_REG_BITS == 64) { 2669 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TB); /* tc->tc_ptr */ 2670 } 2671} 2672 2673typedef struct { 2674 DebugFrameHeader h; 2675 uint8_t fde_def_cfa[4]; 2676 uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2]; 2677} DebugFrame; 2678 2679#define ELF_HOST_MACHINE EM_MIPS 2680/* GDB doesn't appear to require proper setting of ELF_HOST_FLAGS, 2681 which is good because they're really quite complicated for MIPS. */ 2682 2683static const DebugFrame debug_frame = { 2684 .h.cie.len = sizeof(DebugFrameCIE) - 4, /* length after .len member */ 2685 .h.cie.id = -1, 2686 .h.cie.version = 1, 2687 .h.cie.code_align = 1, 2688 .h.cie.data_align = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */ 2689 .h.cie.return_column = TCG_REG_RA, 2690 2691 /* Total FDE size does not include the "len" member. */ 2692 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), 2693 2694 .fde_def_cfa = { 2695 12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */ 2696 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ 2697 (FRAME_SIZE >> 7) 2698 }, 2699 .fde_reg_ofs = { 2700 0x80 + 16, 9, /* DW_CFA_offset, s0, -72 */ 2701 0x80 + 17, 8, /* DW_CFA_offset, s2, -64 */ 2702 0x80 + 18, 7, /* DW_CFA_offset, s3, -56 */ 2703 0x80 + 19, 6, /* DW_CFA_offset, s4, -48 */ 2704 0x80 + 20, 5, /* DW_CFA_offset, s5, -40 */ 2705 0x80 + 21, 4, /* DW_CFA_offset, s6, -32 */ 2706 0x80 + 22, 3, /* DW_CFA_offset, s7, -24 */ 2707 0x80 + 30, 2, /* DW_CFA_offset, s8, -16 */ 2708 0x80 + 31, 1, /* DW_CFA_offset, ra, -8 */ 2709 } 2710}; 2711 2712void tcg_register_jit(const void *buf, size_t buf_size) 2713{ 2714 tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); 2715} 2716