aarch64.isa revision 12538:001ad6b1e592
1// Copyright (c) 2011-2018 ARM Limited 2// All rights reserved 3// 4// The license below extends only to copyright in the software and shall 5// not be construed as granting a license to any other intellectual 6// property including but not limited to intellectual property relating 7// to a hardware implementation of the functionality of the software 8// licensed hereunder. You may use the software subject to the license 9// terms below provided that you ensure that this notice is replicated 10// unmodified and in its entirety in all distributions of the software, 11// modified or unmodified, in source code or in binary form. 12// 13// Redistribution and use in source and binary forms, with or without 14// modification, are permitted provided that the following conditions are 15// met: redistributions of source code must retain the above copyright 16// notice, this list of conditions and the following disclaimer; 17// redistributions in binary form must reproduce the above copyright 18// notice, this list of conditions and the following disclaimer in the 19// documentation and/or other materials provided with the distribution; 20// neither the name of the copyright holders nor the names of its 21// contributors may be used to endorse or promote products derived from 22// this software without specific prior written permission. 23// 24// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 27// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 28// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 30// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 34// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35// 36// Authors: Gabe Black 37// Thomas Grocutt 38// Mbou Eyole 39// Giacomo Gabrielli 40 41output header {{ 42namespace Aarch64 43{ 44 StaticInstPtr decodeDataProcImm(ExtMachInst machInst); 45 StaticInstPtr decodeBranchExcSys(ExtMachInst machInst); 46 StaticInstPtr decodeLoadsStores(ExtMachInst machInst); 47 StaticInstPtr decodeDataProcReg(ExtMachInst machInst); 48 49 template <typename DecoderFeatures> 50 StaticInstPtr decodeFpAdvSIMD(ExtMachInst machInst); 51 StaticInstPtr decodeFp(ExtMachInst machInst); 52 template <typename DecoderFeatures> 53 StaticInstPtr decodeAdvSIMD(ExtMachInst machInst); 54 StaticInstPtr decodeAdvSIMDScalar(ExtMachInst machInst); 55 56 StaticInstPtr decodeGem5Ops(ExtMachInst machInst); 57} 58}}; 59 60output decoder {{ 61namespace Aarch64 62{ 63 StaticInstPtr 64 decodeDataProcImm(ExtMachInst machInst) 65 { 66 IntRegIndex rd = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 67 IntRegIndex rdsp = makeSP(rd); 68 IntRegIndex rdzr = makeZero(rd); 69 IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 70 IntRegIndex rnsp = makeSP(rn); 71 72 uint8_t opc = bits(machInst, 30, 29); 73 bool sf = bits(machInst, 31); 74 bool n = bits(machInst, 22); 75 uint8_t immr = bits(machInst, 21, 16); 76 uint8_t imms = bits(machInst, 15, 10); 77 switch (bits(machInst, 25, 23)) { 78 case 0x0: 79 case 0x1: 80 { 81 uint64_t immlo = bits(machInst, 30, 29); 82 uint64_t immhi = bits(machInst, 23, 5); 83 uint64_t imm = (immlo << 0) | (immhi << 2); 84 if (bits(machInst, 31) == 0) 85 return new AdrXImm(machInst, rdzr, INTREG_ZERO, sext<21>(imm)); 86 else 87 return new AdrpXImm(machInst, rdzr, INTREG_ZERO, 88 sext<33>(imm << 12)); 89 } 90 case 0x2: 91 case 0x3: 92 { 93 uint32_t imm12 = bits(machInst, 21, 10); 94 uint8_t shift = bits(machInst, 23, 22); 95 uint32_t imm; 96 if (shift == 0x0) 97 imm = imm12 << 0; 98 else if (shift == 0x1) 99 imm = imm12 << 12; 100 else 101 return new Unknown64(machInst); 102 switch (opc) { 103 case 0x0: 104 return new AddXImm(machInst, rdsp, rnsp, imm); 105 case 0x1: 106 return new AddXImmCc(machInst, rdzr, rnsp, imm); 107 case 0x2: 108 return new SubXImm(machInst, rdsp, rnsp, imm); 109 case 0x3: 110 return new SubXImmCc(machInst, rdzr, rnsp, imm); 111 } 112 } 113 case 0x4: 114 { 115 if (!sf && n) 116 return new Unknown64(machInst); 117 // len = MSB(n:NOT(imms)), len < 1 is undefined. 118 uint8_t len = 0; 119 if (n) { 120 len = 6; 121 } else if (imms == 0x3f || imms == 0x3e) { 122 return new Unknown64(machInst); 123 } else { 124 len = findMsbSet(imms ^ 0x3f); 125 } 126 // Generate r, s, and size. 127 uint64_t r = bits(immr, len - 1, 0); 128 uint64_t s = bits(imms, len - 1, 0); 129 uint8_t size = 1 << len; 130 if (s == size - 1) 131 return new Unknown64(machInst); 132 // Generate the pattern with s 1s, rotated by r, with size bits. 133 uint64_t pattern = mask(s + 1); 134 if (r) { 135 pattern = (pattern >> r) | (pattern << (size - r)); 136 pattern &= mask(size); 137 } 138 uint8_t width = sf ? 64 : 32; 139 // Replicate that to fill up the immediate. 140 for (unsigned i = 1; i < (width / size); i *= 2) 141 pattern |= (pattern << (i * size)); 142 uint64_t imm = pattern; 143 144 switch (opc) { 145 case 0x0: 146 return new AndXImm(machInst, rdsp, rn, imm); 147 case 0x1: 148 return new OrrXImm(machInst, rdsp, rn, imm); 149 case 0x2: 150 return new EorXImm(machInst, rdsp, rn, imm); 151 case 0x3: 152 return new AndXImmCc(machInst, rdzr, rn, imm); 153 } 154 } 155 case 0x5: 156 { 157 IntRegIndex rd = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 158 IntRegIndex rdzr = makeZero(rd); 159 uint32_t imm16 = bits(machInst, 20, 5); 160 uint32_t hw = bits(machInst, 22, 21); 161 switch (opc) { 162 case 0x0: 163 return new Movn(machInst, rdzr, imm16, hw * 16); 164 case 0x1: 165 return new Unknown64(machInst); 166 case 0x2: 167 return new Movz(machInst, rdzr, imm16, hw * 16); 168 case 0x3: 169 return new Movk(machInst, rdzr, imm16, hw * 16); 170 } 171 } 172 case 0x6: 173 if ((sf != n) || (!sf && (bits(immr, 5) || bits(imms, 5)))) 174 return new Unknown64(machInst); 175 switch (opc) { 176 case 0x0: 177 return new Sbfm64(machInst, rdzr, rn, immr, imms); 178 case 0x1: 179 return new Bfm64(machInst, rdzr, rn, immr, imms); 180 case 0x2: 181 return new Ubfm64(machInst, rdzr, rn, immr, imms); 182 case 0x3: 183 return new Unknown64(machInst); 184 } 185 case 0x7: 186 { 187 IntRegIndex rm = (IntRegIndex)(uint8_t)bits(machInst, 20, 16); 188 if (opc || bits(machInst, 21)) 189 return new Unknown64(machInst); 190 else 191 return new Extr64(machInst, rdzr, rn, rm, imms); 192 } 193 } 194 return new FailUnimplemented("Unhandled Case8", machInst); 195 } 196} 197}}; 198 199output decoder {{ 200namespace Aarch64 201{ 202 StaticInstPtr 203 decodeBranchExcSys(ExtMachInst machInst) 204 { 205 switch (bits(machInst, 30, 29)) { 206 case 0x0: 207 { 208 int64_t imm = sext<26>(bits(machInst, 25, 0)) << 2; 209 if (bits(machInst, 31) == 0) 210 return new B64(machInst, imm); 211 else 212 return new Bl64(machInst, imm); 213 } 214 case 0x1: 215 { 216 IntRegIndex rt = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 217 if (bits(machInst, 25) == 0) { 218 int64_t imm = sext<19>(bits(machInst, 23, 5)) << 2; 219 if (bits(machInst, 24) == 0) 220 return new Cbz64(machInst, imm, rt); 221 else 222 return new Cbnz64(machInst, imm, rt); 223 } else { 224 uint64_t bitmask = 0x1; 225 bitmask <<= bits(machInst, 23, 19); 226 int64_t imm = sext<14>(bits(machInst, 18, 5)) << 2; 227 if (bits(machInst, 31)) 228 bitmask <<= 32; 229 if (bits(machInst, 24) == 0) 230 return new Tbz64(machInst, bitmask, imm, rt); 231 else 232 return new Tbnz64(machInst, bitmask, imm, rt); 233 } 234 } 235 case 0x2: 236 // bit 30:26=10101 237 if (bits(machInst, 31) == 0) { 238 if (bits(machInst, 25, 24) || bits(machInst, 4)) 239 return new Unknown64(machInst); 240 int64_t imm = sext<19>(bits(machInst, 23, 5)) << 2; 241 ConditionCode condCode = 242 (ConditionCode)(uint8_t)(bits(machInst, 3, 0)); 243 return new BCond64(machInst, imm, condCode); 244 } else if (bits(machInst, 25, 24) == 0x0) { 245 246 if (bits(machInst, 4, 2)) 247 return new Unknown64(machInst); 248 249 auto imm16 = bits(machInst, 20, 5); 250 uint8_t decVal = (bits(machInst, 1, 0) << 0) | 251 (bits(machInst, 23, 21) << 2); 252 253 switch (decVal) { 254 case 0x01: 255 return new Svc64(machInst, imm16); 256 case 0x02: 257 return new Hvc64(machInst, imm16); 258 case 0x03: 259 return new Smc64(machInst, imm16); 260 case 0x04: 261 return new Brk64(machInst, imm16); 262 case 0x08: 263 return new Hlt64(machInst, imm16); 264 case 0x15: 265 return new FailUnimplemented("dcps1", machInst); 266 case 0x16: 267 return new FailUnimplemented("dcps2", machInst); 268 case 0x17: 269 return new FailUnimplemented("dcps3", machInst); 270 default: 271 return new Unknown64(machInst); 272 } 273 } else if (bits(machInst, 25, 22) == 0x4) { 274 // bit 31:22=1101010100 275 bool l = bits(machInst, 21); 276 uint8_t op0 = bits(machInst, 20, 19); 277 uint8_t op1 = bits(machInst, 18, 16); 278 uint8_t crn = bits(machInst, 15, 12); 279 uint8_t crm = bits(machInst, 11, 8); 280 uint8_t op2 = bits(machInst, 7, 5); 281 IntRegIndex rt = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 282 switch (op0) { 283 case 0x0: 284 if (rt != 0x1f || l) 285 return new Unknown64(machInst); 286 if (crn == 0x2 && op1 == 0x3) { 287 switch (op2) { 288 case 0x0: 289 return new NopInst(machInst); 290 case 0x1: 291 return new YieldInst(machInst); 292 case 0x2: 293 return new WfeInst(machInst); 294 case 0x3: 295 return new WfiInst(machInst); 296 case 0x4: 297 return new SevInst(machInst); 298 case 0x5: 299 return new SevlInst(machInst); 300 default: 301 return new Unknown64(machInst); 302 } 303 } else if (crn == 0x3 && op1 == 0x3) { 304 switch (op2) { 305 case 0x2: 306 return new Clrex64(machInst); 307 case 0x4: 308 return new Dsb64(machInst); 309 case 0x5: 310 return new Dmb64(machInst); 311 case 0x6: 312 return new Isb64(machInst); 313 default: 314 return new Unknown64(machInst); 315 } 316 } else if (crn == 0x4) { 317 // MSR immediate 318 switch (op1 << 3 | op2) { 319 case 0x5: 320 // SP 321 return new MsrSP64(machInst, 322 (IntRegIndex) MISCREG_SPSEL, 323 INTREG_ZERO, 324 crm & 0x1); 325 case 0x1e: 326 // DAIFSet 327 return new MsrDAIFSet64( 328 machInst, 329 (IntRegIndex) MISCREG_DAIF, 330 INTREG_ZERO, 331 crm); 332 case 0x1f: 333 // DAIFClr 334 return new MsrDAIFClr64( 335 machInst, 336 (IntRegIndex) MISCREG_DAIF, 337 INTREG_ZERO, 338 crm); 339 default: 340 return new Unknown64(machInst); 341 } 342 } else { 343 return new Unknown64(machInst); 344 } 345 break; 346 case 0x1: 347 case 0x2: 348 case 0x3: 349 { 350 // bit 31:22=1101010100, 20:19=11 351 bool read = l; 352 MiscRegIndex miscReg = 353 decodeAArch64SysReg(op0, op1, crn, crm, op2); 354 if (read) { 355 if ((miscReg == MISCREG_DC_CIVAC_Xt) || 356 (miscReg == MISCREG_DC_CVAC_Xt) || 357 (miscReg == MISCREG_DC_IVAC_Xt) || 358 (miscReg == MISCREG_DC_ZVA_Xt)) { 359 return new Unknown64(machInst); 360 } 361 } 362 // Check for invalid registers 363 if (miscReg == MISCREG_UNKNOWN) { 364 return new Unknown64(machInst); 365 } else if (miscRegInfo[miscReg][MISCREG_IMPLEMENTED]) { 366 if (miscReg == MISCREG_NZCV) { 367 if (read) 368 return new MrsNZCV64(machInst, rt, (IntRegIndex) miscReg); 369 else 370 return new MsrNZCV64(machInst, (IntRegIndex) miscReg, rt); 371 } 372 uint32_t iss = msrMrs64IssBuild(read, op0, op1, crn, crm, op2, rt); 373 if (read) { 374 StaticInstPtr si = new Mrs64(machInst, rt, miscReg, iss); 375 if (miscRegInfo[miscReg][MISCREG_UNVERIFIABLE]) 376 si->setFlag(StaticInst::IsUnverifiable); 377 return si; 378 } else { 379 switch (miscReg) { 380 case MISCREG_DC_ZVA_Xt: 381 return new Dczva(machInst, rt, miscReg, iss); 382 case MISCREG_DC_CVAU_Xt: 383 return new Dccvau(machInst, rt, miscReg, iss); 384 case MISCREG_DC_CVAC_Xt: 385 return new Dccvac(machInst, rt, miscReg, iss); 386 case MISCREG_DC_CIVAC_Xt: 387 return new Dccivac(machInst, rt, miscReg, iss); 388 case MISCREG_DC_IVAC_Xt: 389 return new Dcivac(machInst, rt, miscReg, iss); 390 default: 391 return new Msr64(machInst, miscReg, rt, iss); 392 } 393 } 394 } else if (miscRegInfo[miscReg][MISCREG_WARN_NOT_FAIL]) { 395 std::string full_mnem = csprintf("%s %s", 396 read ? "mrs" : "msr", miscRegName[miscReg]); 397 return new WarnUnimplemented(read ? "mrs" : "msr", 398 machInst, full_mnem); 399 } else { 400 return new FailUnimplemented(read ? "mrs" : "msr", 401 machInst, 402 csprintf("%s %s", 403 read ? "mrs" : "msr", 404 miscRegName[miscReg])); 405 } 406 } 407 break; 408 } 409 } else if (bits(machInst, 25) == 0x1) { 410 uint8_t opc = bits(machInst, 24, 21); 411 uint8_t op2 = bits(machInst, 20, 16); 412 uint8_t op3 = bits(machInst, 15, 10); 413 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 414 uint8_t op4 = bits(machInst, 4, 0); 415 if (op2 != 0x1f || op3 != 0x0 || op4 != 0x0) 416 return new Unknown64(machInst); 417 switch (opc) { 418 case 0x0: 419 return new Br64(machInst, rn); 420 case 0x1: 421 return new Blr64(machInst, rn); 422 case 0x2: 423 return new Ret64(machInst, rn); 424 case 0x4: 425 if (rn != 0x1f) 426 return new Unknown64(machInst); 427 return new Eret64(machInst); 428 case 0x5: 429 if (rn != 0x1f) 430 return new Unknown64(machInst); 431 return new FailUnimplemented("dret", machInst); 432 } 433 } 434 default: 435 return new Unknown64(machInst); 436 } 437 return new FailUnimplemented("Unhandled Case7", machInst); 438 } 439} 440}}; 441 442output decoder {{ 443namespace Aarch64 444{ 445 StaticInstPtr 446 decodeLoadsStores(ExtMachInst machInst) 447 { 448 // bit 27,25=10 449 switch (bits(machInst, 29, 28)) { 450 case 0x0: 451 if (bits(machInst, 26) == 0) { 452 if (bits(machInst, 24) != 0) 453 return new Unknown64(machInst); 454 IntRegIndex rt = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 455 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 456 IntRegIndex rnsp = makeSP(rn); 457 IntRegIndex rt2 = (IntRegIndex)(uint8_t)bits(machInst, 14, 10); 458 IntRegIndex rs = (IntRegIndex)(uint8_t)bits(machInst, 20, 16); 459 uint8_t opc = (bits(machInst, 15) << 0) | 460 (bits(machInst, 23, 21) << 1); 461 uint8_t size = bits(machInst, 31, 30); 462 switch (opc) { 463 case 0x0: 464 switch (size) { 465 case 0x0: 466 return new STXRB64(machInst, rt, rnsp, rs); 467 case 0x1: 468 return new STXRH64(machInst, rt, rnsp, rs); 469 case 0x2: 470 return new STXRW64(machInst, rt, rnsp, rs); 471 case 0x3: 472 return new STXRX64(machInst, rt, rnsp, rs); 473 } 474 case 0x1: 475 switch (size) { 476 case 0x0: 477 return new STLXRB64(machInst, rt, rnsp, rs); 478 case 0x1: 479 return new STLXRH64(machInst, rt, rnsp, rs); 480 case 0x2: 481 return new STLXRW64(machInst, rt, rnsp, rs); 482 case 0x3: 483 return new STLXRX64(machInst, rt, rnsp, rs); 484 } 485 case 0x2: 486 switch (size) { 487 case 0x0: 488 case 0x1: 489 return new Unknown64(machInst); 490 case 0x2: 491 return new STXPW64(machInst, rs, rt, rt2, rnsp); 492 case 0x3: 493 return new STXPX64(machInst, rs, rt, rt2, rnsp); 494 } 495 496 case 0x3: 497 switch (size) { 498 case 0x0: 499 case 0x1: 500 return new Unknown64(machInst); 501 case 0x2: 502 return new STLXPW64(machInst, rs, rt, rt2, rnsp); 503 case 0x3: 504 return new STLXPX64(machInst, rs, rt, rt2, rnsp); 505 } 506 507 case 0x4: 508 switch (size) { 509 case 0x0: 510 return new LDXRB64(machInst, rt, rnsp, rs); 511 case 0x1: 512 return new LDXRH64(machInst, rt, rnsp, rs); 513 case 0x2: 514 return new LDXRW64(machInst, rt, rnsp, rs); 515 case 0x3: 516 return new LDXRX64(machInst, rt, rnsp, rs); 517 } 518 case 0x5: 519 switch (size) { 520 case 0x0: 521 return new LDAXRB64(machInst, rt, rnsp, rs); 522 case 0x1: 523 return new LDAXRH64(machInst, rt, rnsp, rs); 524 case 0x2: 525 return new LDAXRW64(machInst, rt, rnsp, rs); 526 case 0x3: 527 return new LDAXRX64(machInst, rt, rnsp, rs); 528 } 529 case 0x6: 530 switch (size) { 531 case 0x0: 532 case 0x1: 533 return new Unknown64(machInst); 534 case 0x2: 535 return new LDXPW64(machInst, rt, rt2, rnsp); 536 case 0x3: 537 return new LDXPX64(machInst, rt, rt2, rnsp); 538 } 539 540 case 0x7: 541 switch (size) { 542 case 0x0: 543 case 0x1: 544 return new Unknown64(machInst); 545 case 0x2: 546 return new LDAXPW64(machInst, rt, rt2, rnsp); 547 case 0x3: 548 return new LDAXPX64(machInst, rt, rt2, rnsp); 549 } 550 551 case 0x9: 552 switch (size) { 553 case 0x0: 554 return new STLRB64(machInst, rt, rnsp); 555 case 0x1: 556 return new STLRH64(machInst, rt, rnsp); 557 case 0x2: 558 return new STLRW64(machInst, rt, rnsp); 559 case 0x3: 560 return new STLRX64(machInst, rt, rnsp); 561 } 562 case 0xd: 563 switch (size) { 564 case 0x0: 565 return new LDARB64(machInst, rt, rnsp); 566 case 0x1: 567 return new LDARH64(machInst, rt, rnsp); 568 case 0x2: 569 return new LDARW64(machInst, rt, rnsp); 570 case 0x3: 571 return new LDARX64(machInst, rt, rnsp); 572 } 573 default: 574 return new Unknown64(machInst); 575 } 576 } else if (bits(machInst, 31)) { 577 return new Unknown64(machInst); 578 } else { 579 return decodeNeonMem(machInst); 580 } 581 case 0x1: 582 { 583 if (bits(machInst, 24) != 0) 584 return new Unknown64(machInst); 585 uint8_t switchVal = (bits(machInst, 26) << 0) | 586 (bits(machInst, 31, 30) << 1); 587 int64_t imm = sext<19>(bits(machInst, 23, 5)) << 2; 588 IntRegIndex rt = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 589 switch (switchVal) { 590 case 0x0: 591 return new LDRWL64_LIT(machInst, rt, imm); 592 case 0x1: 593 return new LDRSFP64_LIT(machInst, rt, imm); 594 case 0x2: 595 return new LDRXL64_LIT(machInst, rt, imm); 596 case 0x3: 597 return new LDRDFP64_LIT(machInst, rt, imm); 598 case 0x4: 599 return new LDRSWL64_LIT(machInst, rt, imm); 600 case 0x5: 601 return new BigFpMemLit("ldr", machInst, rt, imm); 602 case 0x6: 603 return new PRFM64_LIT(machInst, rt, imm); 604 default: 605 return new Unknown64(machInst); 606 } 607 } 608 case 0x2: 609 { 610 uint8_t opc = bits(machInst, 31, 30); 611 if (opc >= 3) 612 return new Unknown64(machInst); 613 uint32_t size = 0; 614 bool fp = bits(machInst, 26); 615 bool load = bits(machInst, 22); 616 if (fp) { 617 size = 4 << opc; 618 } else { 619 if ((opc == 1) && !load) 620 return new Unknown64(machInst); 621 size = (opc == 0 || opc == 1) ? 4 : 8; 622 } 623 uint8_t type = bits(machInst, 24, 23); 624 int64_t imm = sext<7>(bits(machInst, 21, 15)) * size; 625 626 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 627 IntRegIndex rt = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 628 IntRegIndex rt2 = (IntRegIndex)(uint8_t)bits(machInst, 14, 10); 629 630 bool noAlloc = (type == 0); 631 bool signExt = !noAlloc && !fp && opc == 1; 632 PairMemOp::AddrMode mode; 633 const char *mnemonic = NULL; 634 switch (type) { 635 case 0x0: 636 case 0x2: 637 mode = PairMemOp::AddrMd_Offset; 638 break; 639 case 0x1: 640 mode = PairMemOp::AddrMd_PostIndex; 641 break; 642 case 0x3: 643 mode = PairMemOp::AddrMd_PreIndex; 644 break; 645 default: 646 return new Unknown64(machInst); 647 } 648 if (load) { 649 if (noAlloc) 650 mnemonic = "ldnp"; 651 else if (signExt) 652 mnemonic = "ldpsw"; 653 else 654 mnemonic = "ldp"; 655 } else { 656 if (noAlloc) 657 mnemonic = "stnp"; 658 else 659 mnemonic = "stp"; 660 } 661 662 return new LdpStp(mnemonic, machInst, size, fp, load, noAlloc, 663 signExt, false, false, imm, mode, rn, rt, rt2); 664 } 665 // bit 29:27=111, 25=0 666 case 0x3: 667 { 668 uint8_t switchVal = (bits(machInst, 23, 22) << 0) | 669 (bits(machInst, 26) << 2) | 670 (bits(machInst, 31, 30) << 3); 671 if (bits(machInst, 24) == 1) { 672 uint64_t imm12 = bits(machInst, 21, 10); 673 IntRegIndex rt = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 674 IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 675 IntRegIndex rnsp = makeSP(rn); 676 switch (switchVal) { 677 case 0x00: 678 return new STRB64_IMM(machInst, rt, rnsp, imm12); 679 case 0x01: 680 return new LDRB64_IMM(machInst, rt, rnsp, imm12); 681 case 0x02: 682 return new LDRSBX64_IMM(machInst, rt, rnsp, imm12); 683 case 0x03: 684 return new LDRSBW64_IMM(machInst, rt, rnsp, imm12); 685 case 0x04: 686 return new STRBFP64_IMM(machInst, rt, rnsp, imm12); 687 case 0x05: 688 return new LDRBFP64_IMM(machInst, rt, rnsp, imm12); 689 case 0x06: 690 return new BigFpMemImm("str", machInst, false, 691 rt, rnsp, imm12 << 4); 692 case 0x07: 693 return new BigFpMemImm("ldr", machInst, true, 694 rt, rnsp, imm12 << 4); 695 case 0x08: 696 return new STRH64_IMM(machInst, rt, rnsp, imm12 << 1); 697 case 0x09: 698 return new LDRH64_IMM(machInst, rt, rnsp, imm12 << 1); 699 case 0x0a: 700 return new LDRSHX64_IMM(machInst, rt, rnsp, imm12 << 1); 701 case 0x0b: 702 return new LDRSHW64_IMM(machInst, rt, rnsp, imm12 << 1); 703 case 0x0c: 704 return new STRHFP64_IMM(machInst, rt, rnsp, imm12 << 1); 705 case 0x0d: 706 return new LDRHFP64_IMM(machInst, rt, rnsp, imm12 << 1); 707 case 0x10: 708 return new STRW64_IMM(machInst, rt, rnsp, imm12 << 2); 709 case 0x11: 710 return new LDRW64_IMM(machInst, rt, rnsp, imm12 << 2); 711 case 0x12: 712 return new LDRSW64_IMM(machInst, rt, rnsp, imm12 << 2); 713 case 0x14: 714 return new STRSFP64_IMM(machInst, rt, rnsp, imm12 << 2); 715 case 0x15: 716 return new LDRSFP64_IMM(machInst, rt, rnsp, imm12 << 2); 717 case 0x18: 718 return new STRX64_IMM(machInst, rt, rnsp, imm12 << 3); 719 case 0x19: 720 return new LDRX64_IMM(machInst, rt, rnsp, imm12 << 3); 721 case 0x1a: 722 return new PRFM64_IMM(machInst, rt, rnsp, imm12 << 3); 723 case 0x1c: 724 return new STRDFP64_IMM(machInst, rt, rnsp, imm12 << 3); 725 case 0x1d: 726 return new LDRDFP64_IMM(machInst, rt, rnsp, imm12 << 3); 727 default: 728 return new Unknown64(machInst); 729 } 730 } else if (bits(machInst, 21) == 1) { 731 if (bits(machInst, 11, 10) != 0x2) 732 return new Unknown64(machInst); 733 if (!bits(machInst, 14)) 734 return new Unknown64(machInst); 735 IntRegIndex rt = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 736 IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 737 IntRegIndex rnsp = makeSP(rn); 738 IntRegIndex rm = (IntRegIndex)(uint32_t)bits(machInst, 20, 16); 739 ArmExtendType type = 740 (ArmExtendType)(uint32_t)bits(machInst, 15, 13); 741 uint8_t s = bits(machInst, 12); 742 switch (switchVal) { 743 case 0x00: 744 return new STRB64_REG(machInst, rt, rnsp, rm, type, 0); 745 case 0x01: 746 return new LDRB64_REG(machInst, rt, rnsp, rm, type, 0); 747 case 0x02: 748 return new LDRSBX64_REG(machInst, rt, rnsp, rm, type, 0); 749 case 0x03: 750 return new LDRSBW64_REG(machInst, rt, rnsp, rm, type, 0); 751 case 0x04: 752 return new STRBFP64_REG(machInst, rt, rnsp, rm, type, 0); 753 case 0x05: 754 return new LDRBFP64_REG(machInst, rt, rnsp, rm, type, 0); 755 case 0x6: 756 return new BigFpMemReg("str", machInst, false, 757 rt, rnsp, rm, type, s * 4); 758 case 0x7: 759 return new BigFpMemReg("ldr", machInst, true, 760 rt, rnsp, rm, type, s * 4); 761 case 0x08: 762 return new STRH64_REG(machInst, rt, rnsp, rm, type, s); 763 case 0x09: 764 return new LDRH64_REG(machInst, rt, rnsp, rm, type, s); 765 case 0x0a: 766 return new LDRSHX64_REG(machInst, rt, rnsp, rm, type, s); 767 case 0x0b: 768 return new LDRSHW64_REG(machInst, rt, rnsp, rm, type, s); 769 case 0x0c: 770 return new STRHFP64_REG(machInst, rt, rnsp, rm, type, s); 771 case 0x0d: 772 return new LDRHFP64_REG(machInst, rt, rnsp, rm, type, s); 773 case 0x10: 774 return new STRW64_REG(machInst, rt, rnsp, rm, type, s * 2); 775 case 0x11: 776 return new LDRW64_REG(machInst, rt, rnsp, rm, type, s * 2); 777 case 0x12: 778 return new LDRSW64_REG(machInst, rt, rnsp, rm, type, s * 2); 779 case 0x14: 780 return new STRSFP64_REG(machInst, rt, rnsp, rm, type, s * 2); 781 case 0x15: 782 return new LDRSFP64_REG(machInst, rt, rnsp, rm, type, s * 2); 783 case 0x18: 784 return new STRX64_REG(machInst, rt, rnsp, rm, type, s * 3); 785 case 0x19: 786 return new LDRX64_REG(machInst, rt, rnsp, rm, type, s * 3); 787 case 0x1a: 788 return new PRFM64_REG(machInst, rt, rnsp, rm, type, s * 3); 789 case 0x1c: 790 return new STRDFP64_REG(machInst, rt, rnsp, rm, type, s * 3); 791 case 0x1d: 792 return new LDRDFP64_REG(machInst, rt, rnsp, rm, type, s * 3); 793 default: 794 return new Unknown64(machInst); 795 } 796 } else { 797 // bit 29:27=111, 25:24=00, 21=0 798 switch (bits(machInst, 11, 10)) { 799 case 0x0: 800 { 801 IntRegIndex rt = 802 (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 803 IntRegIndex rn = 804 (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 805 IntRegIndex rnsp = makeSP(rn); 806 uint64_t imm = sext<9>(bits(machInst, 20, 12)); 807 switch (switchVal) { 808 case 0x00: 809 return new STURB64_IMM(machInst, rt, rnsp, imm); 810 case 0x01: 811 return new LDURB64_IMM(machInst, rt, rnsp, imm); 812 case 0x02: 813 return new LDURSBX64_IMM(machInst, rt, rnsp, imm); 814 case 0x03: 815 return new LDURSBW64_IMM(machInst, rt, rnsp, imm); 816 case 0x04: 817 return new STURBFP64_IMM(machInst, rt, rnsp, imm); 818 case 0x05: 819 return new LDURBFP64_IMM(machInst, rt, rnsp, imm); 820 case 0x06: 821 return new BigFpMemImm("stur", machInst, false, 822 rt, rnsp, imm); 823 case 0x07: 824 return new BigFpMemImm("ldur", machInst, true, 825 rt, rnsp, imm); 826 case 0x08: 827 return new STURH64_IMM(machInst, rt, rnsp, imm); 828 case 0x09: 829 return new LDURH64_IMM(machInst, rt, rnsp, imm); 830 case 0x0a: 831 return new LDURSHX64_IMM(machInst, rt, rnsp, imm); 832 case 0x0b: 833 return new LDURSHW64_IMM(machInst, rt, rnsp, imm); 834 case 0x0c: 835 return new STURHFP64_IMM(machInst, rt, rnsp, imm); 836 case 0x0d: 837 return new LDURHFP64_IMM(machInst, rt, rnsp, imm); 838 case 0x10: 839 return new STURW64_IMM(machInst, rt, rnsp, imm); 840 case 0x11: 841 return new LDURW64_IMM(machInst, rt, rnsp, imm); 842 case 0x12: 843 return new LDURSW64_IMM(machInst, rt, rnsp, imm); 844 case 0x14: 845 return new STURSFP64_IMM(machInst, rt, rnsp, imm); 846 case 0x15: 847 return new LDURSFP64_IMM(machInst, rt, rnsp, imm); 848 case 0x18: 849 return new STURX64_IMM(machInst, rt, rnsp, imm); 850 case 0x19: 851 return new LDURX64_IMM(machInst, rt, rnsp, imm); 852 case 0x1a: 853 return new PRFUM64_IMM(machInst, rt, rnsp, imm); 854 case 0x1c: 855 return new STURDFP64_IMM(machInst, rt, rnsp, imm); 856 case 0x1d: 857 return new LDURDFP64_IMM(machInst, rt, rnsp, imm); 858 default: 859 return new Unknown64(machInst); 860 } 861 } 862 // bit 29:27=111, 25:24=00, 21=0, 11:10=01 863 case 0x1: 864 { 865 IntRegIndex rt = 866 (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 867 IntRegIndex rn = 868 (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 869 IntRegIndex rnsp = makeSP(rn); 870 uint64_t imm = sext<9>(bits(machInst, 20, 12)); 871 switch (switchVal) { 872 case 0x00: 873 return new STRB64_POST(machInst, rt, rnsp, imm); 874 case 0x01: 875 return new LDRB64_POST(machInst, rt, rnsp, imm); 876 case 0x02: 877 return new LDRSBX64_POST(machInst, rt, rnsp, imm); 878 case 0x03: 879 return new LDRSBW64_POST(machInst, rt, rnsp, imm); 880 case 0x04: 881 return new STRBFP64_POST(machInst, rt, rnsp, imm); 882 case 0x05: 883 return new LDRBFP64_POST(machInst, rt, rnsp, imm); 884 case 0x06: 885 return new BigFpMemPost("str", machInst, false, 886 rt, rnsp, imm); 887 case 0x07: 888 return new BigFpMemPost("ldr", machInst, true, 889 rt, rnsp, imm); 890 case 0x08: 891 return new STRH64_POST(machInst, rt, rnsp, imm); 892 case 0x09: 893 return new LDRH64_POST(machInst, rt, rnsp, imm); 894 case 0x0a: 895 return new LDRSHX64_POST(machInst, rt, rnsp, imm); 896 case 0x0b: 897 return new LDRSHW64_POST(machInst, rt, rnsp, imm); 898 case 0x0c: 899 return new STRHFP64_POST(machInst, rt, rnsp, imm); 900 case 0x0d: 901 return new LDRHFP64_POST(machInst, rt, rnsp, imm); 902 case 0x10: 903 return new STRW64_POST(machInst, rt, rnsp, imm); 904 case 0x11: 905 return new LDRW64_POST(machInst, rt, rnsp, imm); 906 case 0x12: 907 return new LDRSW64_POST(machInst, rt, rnsp, imm); 908 case 0x14: 909 return new STRSFP64_POST(machInst, rt, rnsp, imm); 910 case 0x15: 911 return new LDRSFP64_POST(machInst, rt, rnsp, imm); 912 case 0x18: 913 return new STRX64_POST(machInst, rt, rnsp, imm); 914 case 0x19: 915 return new LDRX64_POST(machInst, rt, rnsp, imm); 916 case 0x1c: 917 return new STRDFP64_POST(machInst, rt, rnsp, imm); 918 case 0x1d: 919 return new LDRDFP64_POST(machInst, rt, rnsp, imm); 920 default: 921 return new Unknown64(machInst); 922 } 923 } 924 case 0x2: 925 { 926 IntRegIndex rt = 927 (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 928 IntRegIndex rn = 929 (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 930 IntRegIndex rnsp = makeSP(rn); 931 uint64_t imm = sext<9>(bits(machInst, 20, 12)); 932 switch (switchVal) { 933 case 0x00: 934 return new STTRB64_IMM(machInst, rt, rnsp, imm); 935 case 0x01: 936 return new LDTRB64_IMM(machInst, rt, rnsp, imm); 937 case 0x02: 938 return new LDTRSBX64_IMM(machInst, rt, rnsp, imm); 939 case 0x03: 940 return new LDTRSBW64_IMM(machInst, rt, rnsp, imm); 941 case 0x08: 942 return new STTRH64_IMM(machInst, rt, rnsp, imm); 943 case 0x09: 944 return new LDTRH64_IMM(machInst, rt, rnsp, imm); 945 case 0x0a: 946 return new LDTRSHX64_IMM(machInst, rt, rnsp, imm); 947 case 0x0b: 948 return new LDTRSHW64_IMM(machInst, rt, rnsp, imm); 949 case 0x10: 950 return new STTRW64_IMM(machInst, rt, rnsp, imm); 951 case 0x11: 952 return new LDTRW64_IMM(machInst, rt, rnsp, imm); 953 case 0x12: 954 return new LDTRSW64_IMM(machInst, rt, rnsp, imm); 955 case 0x18: 956 return new STTRX64_IMM(machInst, rt, rnsp, imm); 957 case 0x19: 958 return new LDTRX64_IMM(machInst, rt, rnsp, imm); 959 default: 960 return new Unknown64(machInst); 961 } 962 } 963 case 0x3: 964 { 965 IntRegIndex rt = 966 (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 967 IntRegIndex rn = 968 (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 969 IntRegIndex rnsp = makeSP(rn); 970 uint64_t imm = sext<9>(bits(machInst, 20, 12)); 971 switch (switchVal) { 972 case 0x00: 973 return new STRB64_PRE(machInst, rt, rnsp, imm); 974 case 0x01: 975 return new LDRB64_PRE(machInst, rt, rnsp, imm); 976 case 0x02: 977 return new LDRSBX64_PRE(machInst, rt, rnsp, imm); 978 case 0x03: 979 return new LDRSBW64_PRE(machInst, rt, rnsp, imm); 980 case 0x04: 981 return new STRBFP64_PRE(machInst, rt, rnsp, imm); 982 case 0x05: 983 return new LDRBFP64_PRE(machInst, rt, rnsp, imm); 984 case 0x06: 985 return new BigFpMemPre("str", machInst, false, 986 rt, rnsp, imm); 987 case 0x07: 988 return new BigFpMemPre("ldr", machInst, true, 989 rt, rnsp, imm); 990 case 0x08: 991 return new STRH64_PRE(machInst, rt, rnsp, imm); 992 case 0x09: 993 return new LDRH64_PRE(machInst, rt, rnsp, imm); 994 case 0x0a: 995 return new LDRSHX64_PRE(machInst, rt, rnsp, imm); 996 case 0x0b: 997 return new LDRSHW64_PRE(machInst, rt, rnsp, imm); 998 case 0x0c: 999 return new STRHFP64_PRE(machInst, rt, rnsp, imm); 1000 case 0x0d: 1001 return new LDRHFP64_PRE(machInst, rt, rnsp, imm); 1002 case 0x10: 1003 return new STRW64_PRE(machInst, rt, rnsp, imm); 1004 case 0x11: 1005 return new LDRW64_PRE(machInst, rt, rnsp, imm); 1006 case 0x12: 1007 return new LDRSW64_PRE(machInst, rt, rnsp, imm); 1008 case 0x14: 1009 return new STRSFP64_PRE(machInst, rt, rnsp, imm); 1010 case 0x15: 1011 return new LDRSFP64_PRE(machInst, rt, rnsp, imm); 1012 case 0x18: 1013 return new STRX64_PRE(machInst, rt, rnsp, imm); 1014 case 0x19: 1015 return new LDRX64_PRE(machInst, rt, rnsp, imm); 1016 case 0x1c: 1017 return new STRDFP64_PRE(machInst, rt, rnsp, imm); 1018 case 0x1d: 1019 return new LDRDFP64_PRE(machInst, rt, rnsp, imm); 1020 default: 1021 return new Unknown64(machInst); 1022 } 1023 } 1024 } 1025 } 1026 } 1027 } 1028 return new FailUnimplemented("Unhandled Case1", machInst); 1029 } 1030} 1031}}; 1032 1033output decoder {{ 1034namespace Aarch64 1035{ 1036 StaticInstPtr 1037 decodeDataProcReg(ExtMachInst machInst) 1038 { 1039 uint8_t switchVal = (bits(machInst, 28) << 1) | 1040 (bits(machInst, 24) << 0); 1041 switch (switchVal) { 1042 case 0x0: 1043 { 1044 uint8_t switchVal = (bits(machInst, 21) << 0) | 1045 (bits(machInst, 30, 29) << 1); 1046 ArmShiftType type = (ArmShiftType)(uint8_t)bits(machInst, 23, 22); 1047 uint8_t imm6 = bits(machInst, 15, 10); 1048 bool sf = bits(machInst, 31); 1049 if (!sf && (imm6 & 0x20)) 1050 return new Unknown64(machInst); 1051 IntRegIndex rd = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 1052 IntRegIndex rdzr = makeZero(rd); 1053 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 1054 IntRegIndex rm = (IntRegIndex)(uint8_t)bits(machInst, 20, 16); 1055 1056 switch (switchVal) { 1057 case 0x0: 1058 return new AndXSReg(machInst, rdzr, rn, rm, imm6, type); 1059 case 0x1: 1060 return new BicXSReg(machInst, rdzr, rn, rm, imm6, type); 1061 case 0x2: 1062 return new OrrXSReg(machInst, rdzr, rn, rm, imm6, type); 1063 case 0x3: 1064 return new OrnXSReg(machInst, rdzr, rn, rm, imm6, type); 1065 case 0x4: 1066 return new EorXSReg(machInst, rdzr, rn, rm, imm6, type); 1067 case 0x5: 1068 return new EonXSReg(machInst, rdzr, rn, rm, imm6, type); 1069 case 0x6: 1070 return new AndXSRegCc(machInst, rdzr, rn, rm, imm6, type); 1071 case 0x7: 1072 return new BicXSRegCc(machInst, rdzr, rn, rm, imm6, type); 1073 } 1074 } 1075 case 0x1: 1076 { 1077 uint8_t switchVal = bits(machInst, 30, 29); 1078 if (bits(machInst, 21) == 0) { 1079 ArmShiftType type = 1080 (ArmShiftType)(uint8_t)bits(machInst, 23, 22); 1081 if (type == ROR) 1082 return new Unknown64(machInst); 1083 uint8_t imm6 = bits(machInst, 15, 10); 1084 if (!bits(machInst, 31) && bits(imm6, 5)) 1085 return new Unknown64(machInst); 1086 IntRegIndex rd = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 1087 IntRegIndex rdzr = makeZero(rd); 1088 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 1089 IntRegIndex rm = (IntRegIndex)(uint8_t)bits(machInst, 20, 16); 1090 switch (switchVal) { 1091 case 0x0: 1092 return new AddXSReg(machInst, rdzr, rn, rm, imm6, type); 1093 case 0x1: 1094 return new AddXSRegCc(machInst, rdzr, rn, rm, imm6, type); 1095 case 0x2: 1096 return new SubXSReg(machInst, rdzr, rn, rm, imm6, type); 1097 case 0x3: 1098 return new SubXSRegCc(machInst, rdzr, rn, rm, imm6, type); 1099 } 1100 } else { 1101 if (bits(machInst, 23, 22) != 0 || bits(machInst, 12, 10) > 0x4) 1102 return new Unknown64(machInst); 1103 ArmExtendType type = 1104 (ArmExtendType)(uint8_t)bits(machInst, 15, 13); 1105 uint8_t imm3 = bits(machInst, 12, 10); 1106 IntRegIndex rd = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 1107 IntRegIndex rdsp = makeSP(rd); 1108 IntRegIndex rdzr = makeZero(rd); 1109 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 1110 IntRegIndex rnsp = makeSP(rn); 1111 IntRegIndex rm = (IntRegIndex)(uint8_t)bits(machInst, 20, 16); 1112 1113 switch (switchVal) { 1114 case 0x0: 1115 return new AddXEReg(machInst, rdsp, rnsp, rm, type, imm3); 1116 case 0x1: 1117 return new AddXERegCc(machInst, rdzr, rnsp, rm, type, imm3); 1118 case 0x2: 1119 return new SubXEReg(machInst, rdsp, rnsp, rm, type, imm3); 1120 case 0x3: 1121 return new SubXERegCc(machInst, rdzr, rnsp, rm, type, imm3); 1122 } 1123 } 1124 } 1125 case 0x2: 1126 { 1127 if (bits(machInst, 21) == 1) 1128 return new Unknown64(machInst); 1129 IntRegIndex rd = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 1130 IntRegIndex rdzr = makeZero(rd); 1131 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 1132 IntRegIndex rm = (IntRegIndex)(uint8_t)bits(machInst, 20, 16); 1133 switch (bits(machInst, 23, 22)) { 1134 case 0x0: 1135 { 1136 if (bits(machInst, 15, 10)) 1137 return new Unknown64(machInst); 1138 uint8_t switchVal = bits(machInst, 30, 29); 1139 switch (switchVal) { 1140 case 0x0: 1141 return new AdcXSReg(machInst, rdzr, rn, rm, 0, LSL); 1142 case 0x1: 1143 return new AdcXSRegCc(machInst, rdzr, rn, rm, 0, LSL); 1144 case 0x2: 1145 return new SbcXSReg(machInst, rdzr, rn, rm, 0, LSL); 1146 case 0x3: 1147 return new SbcXSRegCc(machInst, rdzr, rn, rm, 0, LSL); 1148 } 1149 } 1150 case 0x1: 1151 { 1152 if ((bits(machInst, 4) == 1) || 1153 (bits(machInst, 10) == 1) || 1154 (bits(machInst, 29) == 0)) { 1155 return new Unknown64(machInst); 1156 } 1157 ConditionCode cond = 1158 (ConditionCode)(uint8_t)bits(machInst, 15, 12); 1159 uint8_t flags = bits(machInst, 3, 0); 1160 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 1161 if (bits(machInst, 11) == 0) { 1162 IntRegIndex rm = 1163 (IntRegIndex)(uint8_t)bits(machInst, 20, 16); 1164 if (bits(machInst, 30) == 0) { 1165 return new CcmnReg64(machInst, rn, rm, cond, flags); 1166 } else { 1167 return new CcmpReg64(machInst, rn, rm, cond, flags); 1168 } 1169 } else { 1170 uint8_t imm5 = bits(machInst, 20, 16); 1171 if (bits(machInst, 30) == 0) { 1172 return new CcmnImm64(machInst, rn, imm5, cond, flags); 1173 } else { 1174 return new CcmpImm64(machInst, rn, imm5, cond, flags); 1175 } 1176 } 1177 } 1178 case 0x2: 1179 { 1180 if (bits(machInst, 29) == 1 || 1181 bits(machInst, 11) == 1) { 1182 return new Unknown64(machInst); 1183 } 1184 uint8_t switchVal = (bits(machInst, 10) << 0) | 1185 (bits(machInst, 30) << 1); 1186 IntRegIndex rd = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 1187 IntRegIndex rdzr = makeZero(rd); 1188 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 1189 IntRegIndex rm = (IntRegIndex)(uint8_t)bits(machInst, 20, 16); 1190 ConditionCode cond = 1191 (ConditionCode)(uint8_t)bits(machInst, 15, 12); 1192 switch (switchVal) { 1193 case 0x0: 1194 return new Csel64(machInst, rdzr, rn, rm, cond); 1195 case 0x1: 1196 return new Csinc64(machInst, rdzr, rn, rm, cond); 1197 case 0x2: 1198 return new Csinv64(machInst, rdzr, rn, rm, cond); 1199 case 0x3: 1200 return new Csneg64(machInst, rdzr, rn, rm, cond); 1201 } 1202 } 1203 case 0x3: 1204 if (bits(machInst, 30) == 0) { 1205 if (bits(machInst, 29) != 0) 1206 return new Unknown64(machInst); 1207 uint8_t switchVal = bits(machInst, 15, 10); 1208 switch (switchVal) { 1209 case 0x2: 1210 return new Udiv64(machInst, rdzr, rn, rm); 1211 case 0x3: 1212 return new Sdiv64(machInst, rdzr, rn, rm); 1213 case 0x8: 1214 return new Lslv64(machInst, rdzr, rn, rm); 1215 case 0x9: 1216 return new Lsrv64(machInst, rdzr, rn, rm); 1217 case 0xa: 1218 return new Asrv64(machInst, rdzr, rn, rm); 1219 case 0xb: 1220 return new Rorv64(machInst, rdzr, rn, rm); 1221 case 0x10: 1222 return new Crc32b64(machInst, rdzr, rn, rm); 1223 case 0x11: 1224 return new Crc32h64(machInst, rdzr, rn, rm); 1225 case 0x12: 1226 return new Crc32w64(machInst, rdzr, rn, rm); 1227 case 0x13: 1228 return new Crc32x64(machInst, rdzr, rn, rm); 1229 case 0x14: 1230 return new Crc32cb64(machInst, rdzr, rn, rm); 1231 case 0x15: 1232 return new Crc32ch64(machInst, rdzr, rn, rm); 1233 case 0x16: 1234 return new Crc32cw64(machInst, rdzr, rn, rm); 1235 case 0x17: 1236 return new Crc32cx64(machInst, rdzr, rn, rm); 1237 default: 1238 return new Unknown64(machInst); 1239 } 1240 } else { 1241 if (bits(machInst, 20, 16) != 0 || 1242 bits(machInst, 29) != 0) { 1243 return new Unknown64(machInst); 1244 } 1245 uint8_t switchVal = bits(machInst, 15, 10); 1246 switch (switchVal) { 1247 case 0x0: 1248 return new Rbit64(machInst, rdzr, rn); 1249 case 0x1: 1250 return new Rev1664(machInst, rdzr, rn); 1251 case 0x2: 1252 if (bits(machInst, 31) == 0) 1253 return new Rev64(machInst, rdzr, rn); 1254 else 1255 return new Rev3264(machInst, rdzr, rn); 1256 case 0x3: 1257 if (bits(machInst, 31) != 1) 1258 return new Unknown64(machInst); 1259 return new Rev64(machInst, rdzr, rn); 1260 case 0x4: 1261 return new Clz64(machInst, rdzr, rn); 1262 case 0x5: 1263 return new Cls64(machInst, rdzr, rn); 1264 } 1265 } 1266 } 1267 } 1268 case 0x3: 1269 { 1270 if (bits(machInst, 30, 29) != 0x0 || 1271 (bits(machInst, 23, 21) != 0 && bits(machInst, 31) == 0)) 1272 return new Unknown64(machInst); 1273 IntRegIndex rd = (IntRegIndex)(uint8_t)bits(machInst, 4, 0); 1274 IntRegIndex rdzr = makeZero(rd); 1275 IntRegIndex rn = (IntRegIndex)(uint8_t)bits(machInst, 9, 5); 1276 IntRegIndex ra = (IntRegIndex)(uint8_t)bits(machInst, 14, 10); 1277 IntRegIndex rm = (IntRegIndex)(uint8_t)bits(machInst, 20, 16); 1278 switch (bits(machInst, 23, 21)) { 1279 case 0x0: 1280 if (bits(machInst, 15) == 0) 1281 return new Madd64(machInst, rdzr, ra, rn, rm); 1282 else 1283 return new Msub64(machInst, rdzr, ra, rn, rm); 1284 case 0x1: 1285 if (bits(machInst, 15) == 0) 1286 return new Smaddl64(machInst, rdzr, ra, rn, rm); 1287 else 1288 return new Smsubl64(machInst, rdzr, ra, rn, rm); 1289 case 0x2: 1290 if (bits(machInst, 15) != 0) 1291 return new Unknown64(machInst); 1292 return new Smulh64(machInst, rdzr, rn, rm); 1293 case 0x5: 1294 if (bits(machInst, 15) == 0) 1295 return new Umaddl64(machInst, rdzr, ra, rn, rm); 1296 else 1297 return new Umsubl64(machInst, rdzr, ra, rn, rm); 1298 case 0x6: 1299 if (bits(machInst, 15) != 0) 1300 return new Unknown64(machInst); 1301 return new Umulh64(machInst, rdzr, rn, rm); 1302 default: 1303 return new Unknown64(machInst); 1304 } 1305 } 1306 } 1307 return new FailUnimplemented("Unhandled Case2", machInst); 1308 } 1309} 1310}}; 1311 1312output decoder {{ 1313namespace Aarch64 1314{ 1315 template <typename DecoderFeatures> 1316 StaticInstPtr 1317 decodeAdvSIMD(ExtMachInst machInst) 1318 { 1319 if (bits(machInst, 24) == 1) { 1320 if (bits(machInst, 10) == 0) { 1321 return decodeNeonIndexedElem<DecoderFeatures>(machInst); 1322 } else if (bits(machInst, 23) == 1) { 1323 return new Unknown64(machInst); 1324 } else { 1325 if (bits(machInst, 22, 19)) { 1326 return decodeNeonShiftByImm(machInst); 1327 } else { 1328 return decodeNeonModImm(machInst); 1329 } 1330 } 1331 } else if (bits(machInst, 21) == 1) { 1332 if (bits(machInst, 10) == 1) { 1333 return decodeNeon3Same<DecoderFeatures>(machInst); 1334 } else if (bits(machInst, 11) == 0) { 1335 return decodeNeon3Diff(machInst); 1336 } else if (bits(machInst, 20, 17) == 0x0) { 1337 return decodeNeon2RegMisc(machInst); 1338 } else if (bits(machInst, 20, 17) == 0x8) { 1339 return decodeNeonAcrossLanes(machInst); 1340 } else { 1341 return new Unknown64(machInst); 1342 } 1343 } else if (bits(machInst, 24) || 1344 bits(machInst, 21) || 1345 bits(machInst, 15)) { 1346 return new Unknown64(machInst); 1347 } else if (bits(machInst, 10) == 1) { 1348 if (bits(machInst, 23, 22)) 1349 return new Unknown64(machInst); 1350 return decodeNeonCopy(machInst); 1351 } else if (bits(machInst, 29) == 1) { 1352 return decodeNeonExt(machInst); 1353 } else if (bits(machInst, 11) == 1) { 1354 return decodeNeonZipUzpTrn(machInst); 1355 } else if (bits(machInst, 23, 22) == 0x0) { 1356 return decodeNeonTblTbx(machInst); 1357 } else { 1358 return new Unknown64(machInst); 1359 } 1360 return new FailUnimplemented("Unhandled Case3", machInst); 1361 } 1362} 1363}}; 1364 1365 1366output decoder {{ 1367namespace Aarch64 1368{ 1369 StaticInstPtr 1370 // bit 30=0, 28:25=1111 1371 decodeFp(ExtMachInst machInst) 1372 { 1373 if (bits(machInst, 24) == 1) { 1374 if (bits(machInst, 31) || bits(machInst, 29)) 1375 return new Unknown64(machInst); 1376 IntRegIndex rd = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 1377 IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 1378 IntRegIndex rm = (IntRegIndex)(uint32_t)bits(machInst, 20, 16); 1379 IntRegIndex ra = (IntRegIndex)(uint32_t)bits(machInst, 14, 10); 1380 uint8_t switchVal = (bits(machInst, 23, 21) << 1) | 1381 (bits(machInst, 15) << 0); 1382 switch (switchVal) { 1383 case 0x0: // FMADD Sd = Sa + Sn*Sm 1384 return new FMAddS(machInst, rd, rn, rm, ra); 1385 case 0x1: // FMSUB Sd = Sa + (-Sn)*Sm 1386 return new FMSubS(machInst, rd, rn, rm, ra); 1387 case 0x2: // FNMADD Sd = (-Sa) + (-Sn)*Sm 1388 return new FNMAddS(machInst, rd, rn, rm, ra); 1389 case 0x3: // FNMSUB Sd = (-Sa) + Sn*Sm 1390 return new FNMSubS(machInst, rd, rn, rm, ra); 1391 case 0x4: // FMADD Dd = Da + Dn*Dm 1392 return new FMAddD(machInst, rd, rn, rm, ra); 1393 case 0x5: // FMSUB Dd = Da + (-Dn)*Dm 1394 return new FMSubD(machInst, rd, rn, rm, ra); 1395 case 0x6: // FNMADD Dd = (-Da) + (-Dn)*Dm 1396 return new FNMAddD(machInst, rd, rn, rm, ra); 1397 case 0x7: // FNMSUB Dd = (-Da) + Dn*Dm 1398 return new FNMSubD(machInst, rd, rn, rm, ra); 1399 default: 1400 return new Unknown64(machInst); 1401 } 1402 } else if (bits(machInst, 21) == 0) { 1403 bool s = bits(machInst, 29); 1404 if (s) 1405 return new Unknown64(machInst); 1406 uint8_t switchVal = bits(machInst, 20, 16); 1407 uint8_t type = bits(machInst, 23, 22); 1408 uint8_t scale = bits(machInst, 15, 10); 1409 IntRegIndex rd = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 1410 IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 1411 if (bits(machInst, 18, 17) == 3 && scale != 0) 1412 return new Unknown64(machInst); 1413 // 30:24=0011110, 21=0 1414 switch (switchVal) { 1415 case 0x00: 1416 return new FailUnimplemented("fcvtns", machInst); 1417 case 0x01: 1418 return new FailUnimplemented("fcvtnu", machInst); 1419 case 0x02: 1420 switch ( (bits(machInst, 31) << 2) | type ) { 1421 case 0: // SCVTF Sd = convertFromInt(Wn/(2^fbits)) 1422 return new FcvtSFixedFpSW(machInst, rd, rn, scale); 1423 case 1: // SCVTF Dd = convertFromInt(Wn/(2^fbits)) 1424 return new FcvtSFixedFpDW(machInst, rd, rn, scale); 1425 case 4: // SCVTF Sd = convertFromInt(Xn/(2^fbits)) 1426 return new FcvtSFixedFpSX(machInst, rd, rn, scale); 1427 case 5: // SCVTF Dd = convertFromInt(Xn/(2^fbits)) 1428 return new FcvtSFixedFpDX(machInst, rd, rn, scale); 1429 default: 1430 return new Unknown64(machInst); 1431 } 1432 case 0x03: 1433 switch ( (bits(machInst, 31) << 2) | type ) { 1434 case 0: // UCVTF Sd = convertFromInt(Wn/(2^fbits)) 1435 return new FcvtUFixedFpSW(machInst, rd, rn, scale); 1436 case 1: // UCVTF Dd = convertFromInt(Wn/(2^fbits)) 1437 return new FcvtUFixedFpDW(machInst, rd, rn, scale); 1438 case 4: // UCVTF Sd = convertFromInt(Xn/(2^fbits)) 1439 return new FcvtUFixedFpSX(machInst, rd, rn, scale); 1440 case 5: // UCVTF Dd = convertFromInt(Xn/(2^fbits)) 1441 return new FcvtUFixedFpDX(machInst, rd, rn, scale); 1442 default: 1443 return new Unknown64(machInst); 1444 } 1445 case 0x04: 1446 return new FailUnimplemented("fcvtas", machInst); 1447 case 0x05: 1448 return new FailUnimplemented("fcvtau", machInst); 1449 case 0x08: 1450 return new FailUnimplemented("fcvtps", machInst); 1451 case 0x09: 1452 return new FailUnimplemented("fcvtpu", machInst); 1453 case 0x0e: 1454 return new FailUnimplemented("fmov elem. to 64", machInst); 1455 case 0x0f: 1456 return new FailUnimplemented("fmov 64 bit", machInst); 1457 case 0x10: 1458 return new FailUnimplemented("fcvtms", machInst); 1459 case 0x11: 1460 return new FailUnimplemented("fcvtmu", machInst); 1461 case 0x18: 1462 switch ( (bits(machInst, 31) << 2) | type ) { 1463 case 0: // FCVTZS Wd = convertToIntExactTowardZero(Sn*(2^fbits)) 1464 return new FcvtFpSFixedSW(machInst, rd, rn, scale); 1465 case 1: // FCVTZS Wd = convertToIntExactTowardZero(Dn*(2^fbits)) 1466 return new FcvtFpSFixedDW(machInst, rd, rn, scale); 1467 case 4: // FCVTZS Xd = convertToIntExactTowardZero(Sn*(2^fbits)) 1468 return new FcvtFpSFixedSX(machInst, rd, rn, scale); 1469 case 5: // FCVTZS Xd = convertToIntExactTowardZero(Dn*(2^fbits)) 1470 return new FcvtFpSFixedDX(machInst, rd, rn, scale); 1471 default: 1472 return new Unknown64(machInst); 1473 } 1474 case 0x19: 1475 switch ( (bits(machInst, 31) << 2) | type ) { 1476 case 0: // FCVTZU Wd = convertToIntExactTowardZero(Sn*(2^fbits)) 1477 return new FcvtFpUFixedSW(machInst, rd, rn, scale); 1478 case 1: // FCVTZU Wd = convertToIntExactTowardZero(Dn*(2^fbits)) 1479 return new FcvtFpUFixedDW(machInst, rd, rn, scale); 1480 case 4: // FCVTZU Xd = convertToIntExactTowardZero(Sn*(2^fbits)) 1481 return new FcvtFpUFixedSX(machInst, rd, rn, scale); 1482 case 5: // FCVTZU Xd = convertToIntExactTowardZero(Dn*(2^fbits)) 1483 return new FcvtFpUFixedDX(machInst, rd, rn, scale); 1484 default: 1485 return new Unknown64(machInst); 1486 } 1487 } 1488 } else { 1489 // 30=0, 28:24=11110, 21=1 1490 uint8_t type = bits(machInst, 23, 22); 1491 uint8_t imm8 = bits(machInst, 20, 13); 1492 IntRegIndex rd = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 1493 IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 1494 switch (bits(machInst, 11, 10)) { 1495 case 0x0: 1496 if (bits(machInst, 12) == 1) { 1497 if (bits(machInst, 31) || 1498 bits(machInst, 29) || 1499 bits(machInst, 9, 5)) { 1500 return new Unknown64(machInst); 1501 } 1502 // 31:29=000, 28:24=11110, 21=1, 12:10=100 1503 if (type == 0) { 1504 // FMOV S[d] = imm8<7>:NOT(imm8<6>):Replicate(imm8<6>,5) 1505 // :imm8<5:0>:Zeros(19) 1506 uint32_t imm = vfp_modified_imm(imm8, false); 1507 return new FmovImmS(machInst, rd, imm); 1508 } else if (type == 1) { 1509 // FMOV D[d] = imm8<7>:NOT(imm8<6>):Replicate(imm8<6>,8) 1510 // :imm8<5:0>:Zeros(48) 1511 uint64_t imm = vfp_modified_imm(imm8, true); 1512 return new FmovImmD(machInst, rd, imm); 1513 } else { 1514 return new Unknown64(machInst); 1515 } 1516 } else if (bits(machInst, 13) == 1) { 1517 if (bits(machInst, 31) || 1518 bits(machInst, 29) || 1519 bits(machInst, 15, 14) || 1520 bits(machInst, 23) || 1521 bits(machInst, 2, 0)) { 1522 return new Unknown64(machInst); 1523 } 1524 uint8_t switchVal = (bits(machInst, 4, 3) << 0) | 1525 (bits(machInst, 22) << 2); 1526 IntRegIndex rm = (IntRegIndex)(uint32_t) 1527 bits(machInst, 20, 16); 1528 // 28:23=000111100, 21=1, 15:10=001000, 2:0=000 1529 switch (switchVal) { 1530 case 0x0: 1531 // FCMP flags = compareQuiet(Sn,Sm) 1532 return new FCmpRegS(machInst, rn, rm); 1533 case 0x1: 1534 // FCMP flags = compareQuiet(Sn,0.0) 1535 return new FCmpImmS(machInst, rn, 0); 1536 case 0x2: 1537 // FCMPE flags = compareSignaling(Sn,Sm) 1538 return new FCmpERegS(machInst, rn, rm); 1539 case 0x3: 1540 // FCMPE flags = compareSignaling(Sn,0.0) 1541 return new FCmpEImmS(machInst, rn, 0); 1542 case 0x4: 1543 // FCMP flags = compareQuiet(Dn,Dm) 1544 return new FCmpRegD(machInst, rn, rm); 1545 case 0x5: 1546 // FCMP flags = compareQuiet(Dn,0.0) 1547 return new FCmpImmD(machInst, rn, 0); 1548 case 0x6: 1549 // FCMPE flags = compareSignaling(Dn,Dm) 1550 return new FCmpERegD(machInst, rn, rm); 1551 case 0x7: 1552 // FCMPE flags = compareSignaling(Dn,0.0) 1553 return new FCmpEImmD(machInst, rn, 0); 1554 default: 1555 return new Unknown64(machInst); 1556 } 1557 } else if (bits(machInst, 14) == 1) { 1558 if (bits(machInst, 31) || bits(machInst, 29)) 1559 return new Unknown64(machInst); 1560 uint8_t opcode = bits(machInst, 20, 15); 1561 // Bits 31:24=00011110, 21=1, 14:10=10000 1562 switch (opcode) { 1563 case 0x0: 1564 if (type == 0) 1565 // FMOV Sd = Sn 1566 return new FmovRegS(machInst, rd, rn); 1567 else if (type == 1) 1568 // FMOV Dd = Dn 1569 return new FmovRegD(machInst, rd, rn); 1570 break; 1571 case 0x1: 1572 if (type == 0) 1573 // FABS Sd = abs(Sn) 1574 return new FAbsS(machInst, rd, rn); 1575 else if (type == 1) 1576 // FABS Dd = abs(Dn) 1577 return new FAbsD(machInst, rd, rn); 1578 break; 1579 case 0x2: 1580 if (type == 0) 1581 // FNEG Sd = -Sn 1582 return new FNegS(machInst, rd, rn); 1583 else if (type == 1) 1584 // FNEG Dd = -Dn 1585 return new FNegD(machInst, rd, rn); 1586 break; 1587 case 0x3: 1588 if (type == 0) 1589 // FSQRT Sd = sqrt(Sn) 1590 return new FSqrtS(machInst, rd, rn); 1591 else if (type == 1) 1592 // FSQRT Dd = sqrt(Dn) 1593 return new FSqrtD(machInst, rd, rn); 1594 break; 1595 case 0x4: 1596 if (type == 1) 1597 // FCVT Sd = convertFormat(Dn) 1598 return new FcvtFpDFpS(machInst, rd, rn); 1599 else if (type == 3) 1600 // FCVT Sd = convertFormat(Hn) 1601 return new FcvtFpHFpS(machInst, rd, rn); 1602 break; 1603 case 0x5: 1604 if (type == 0) 1605 // FCVT Dd = convertFormat(Sn) 1606 return new FCvtFpSFpD(machInst, rd, rn); 1607 else if (type == 3) 1608 // FCVT Dd = convertFormat(Hn) 1609 return new FcvtFpHFpD(machInst, rd, rn); 1610 break; 1611 case 0x7: 1612 if (type == 0) 1613 // FCVT Hd = convertFormat(Sn) 1614 return new FcvtFpSFpH(machInst, rd, rn); 1615 else if (type == 1) 1616 // FCVT Hd = convertFormat(Dn) 1617 return new FcvtFpDFpH(machInst, rd, rn); 1618 break; 1619 case 0x8: 1620 if (type == 0) // FRINTN Sd = roundToIntegralTiesToEven(Sn) 1621 return new FRIntNS(machInst, rd, rn); 1622 else if (type == 1) // FRINTN Dd = roundToIntegralTiesToEven(Dn) 1623 return new FRIntND(machInst, rd, rn); 1624 break; 1625 case 0x9: 1626 if (type == 0) // FRINTP Sd = roundToIntegralTowardPlusInf(Sn) 1627 return new FRIntPS(machInst, rd, rn); 1628 else if (type == 1) // FRINTP Dd = roundToIntegralTowardPlusInf(Dn) 1629 return new FRIntPD(machInst, rd, rn); 1630 break; 1631 case 0xa: 1632 if (type == 0) // FRINTM Sd = roundToIntegralTowardMinusInf(Sn) 1633 return new FRIntMS(machInst, rd, rn); 1634 else if (type == 1) // FRINTM Dd = roundToIntegralTowardMinusInf(Dn) 1635 return new FRIntMD(machInst, rd, rn); 1636 break; 1637 case 0xb: 1638 if (type == 0) // FRINTZ Sd = roundToIntegralTowardZero(Sn) 1639 return new FRIntZS(machInst, rd, rn); 1640 else if (type == 1) // FRINTZ Dd = roundToIntegralTowardZero(Dn) 1641 return new FRIntZD(machInst, rd, rn); 1642 break; 1643 case 0xc: 1644 if (type == 0) // FRINTA Sd = roundToIntegralTiesToAway(Sn) 1645 return new FRIntAS(machInst, rd, rn); 1646 else if (type == 1) // FRINTA Dd = roundToIntegralTiesToAway(Dn) 1647 return new FRIntAD(machInst, rd, rn); 1648 break; 1649 case 0xe: 1650 if (type == 0) // FRINTX Sd = roundToIntegralExact(Sn) 1651 return new FRIntXS(machInst, rd, rn); 1652 else if (type == 1) // FRINTX Dd = roundToIntegralExact(Dn) 1653 return new FRIntXD(machInst, rd, rn); 1654 break; 1655 case 0xf: 1656 if (type == 0) // FRINTI Sd = roundToIntegral(Sn) 1657 return new FRIntIS(machInst, rd, rn); 1658 else if (type == 1) // FRINTI Dd = roundToIntegral(Dn) 1659 return new FRIntID(machInst, rd, rn); 1660 break; 1661 default: 1662 return new Unknown64(machInst); 1663 } 1664 return new Unknown64(machInst); 1665 } else if (bits(machInst, 15) == 1) { 1666 return new Unknown64(machInst); 1667 } else { 1668 if (bits(machInst, 29)) 1669 return new Unknown64(machInst); 1670 uint8_t rmode = bits(machInst, 20, 19); 1671 uint8_t switchVal1 = bits(machInst, 18, 16); 1672 uint8_t switchVal2 = (type << 1) | bits(machInst, 31); 1673 // 30:24=0011110, 21=1, 15:10=000000 1674 switch (switchVal1) { 1675 case 0x0: 1676 switch ((switchVal2 << 2) | rmode) { 1677 case 0x0: //FCVTNS Wd = convertToIntExactTiesToEven(Sn) 1678 return new FcvtFpSIntWSN(machInst, rd, rn); 1679 case 0x1: //FCVTPS Wd = convertToIntExactTowardPlusInf(Sn) 1680 return new FcvtFpSIntWSP(machInst, rd, rn); 1681 case 0x2: //FCVTMS Wd = convertToIntExactTowardMinusInf(Sn) 1682 return new FcvtFpSIntWSM(machInst, rd, rn); 1683 case 0x3: //FCVTZS Wd = convertToIntExactTowardZero(Sn) 1684 return new FcvtFpSIntWSZ(machInst, rd, rn); 1685 case 0x4: //FCVTNS Xd = convertToIntExactTiesToEven(Sn) 1686 return new FcvtFpSIntXSN(machInst, rd, rn); 1687 case 0x5: //FCVTPS Xd = convertToIntExactTowardPlusInf(Sn) 1688 return new FcvtFpSIntXSP(machInst, rd, rn); 1689 case 0x6: //FCVTMS Xd = convertToIntExactTowardMinusInf(Sn) 1690 return new FcvtFpSIntXSM(machInst, rd, rn); 1691 case 0x7: //FCVTZS Xd = convertToIntExactTowardZero(Sn) 1692 return new FcvtFpSIntXSZ(machInst, rd, rn); 1693 case 0x8: //FCVTNS Wd = convertToIntExactTiesToEven(Dn) 1694 return new FcvtFpSIntWDN(machInst, rd, rn); 1695 case 0x9: //FCVTPS Wd = convertToIntExactTowardPlusInf(Dn) 1696 return new FcvtFpSIntWDP(machInst, rd, rn); 1697 case 0xA: //FCVTMS Wd = convertToIntExactTowardMinusInf(Dn) 1698 return new FcvtFpSIntWDM(machInst, rd, rn); 1699 case 0xB: //FCVTZS Wd = convertToIntExactTowardZero(Dn) 1700 return new FcvtFpSIntWDZ(machInst, rd, rn); 1701 case 0xC: //FCVTNS Xd = convertToIntExactTiesToEven(Dn) 1702 return new FcvtFpSIntXDN(machInst, rd, rn); 1703 case 0xD: //FCVTPS Xd = convertToIntExactTowardPlusInf(Dn) 1704 return new FcvtFpSIntXDP(machInst, rd, rn); 1705 case 0xE: //FCVTMS Xd = convertToIntExactTowardMinusInf(Dn) 1706 return new FcvtFpSIntXDM(machInst, rd, rn); 1707 case 0xF: //FCVTZS Xd = convertToIntExactTowardZero(Dn) 1708 return new FcvtFpSIntXDZ(machInst, rd, rn); 1709 default: 1710 return new Unknown64(machInst); 1711 } 1712 case 0x1: 1713 switch ((switchVal2 << 2) | rmode) { 1714 case 0x0: //FCVTNU Wd = convertToIntExactTiesToEven(Sn) 1715 return new FcvtFpUIntWSN(machInst, rd, rn); 1716 case 0x1: //FCVTPU Wd = convertToIntExactTowardPlusInf(Sn) 1717 return new FcvtFpUIntWSP(machInst, rd, rn); 1718 case 0x2: //FCVTMU Wd = convertToIntExactTowardMinusInf(Sn) 1719 return new FcvtFpUIntWSM(machInst, rd, rn); 1720 case 0x3: //FCVTZU Wd = convertToIntExactTowardZero(Sn) 1721 return new FcvtFpUIntWSZ(machInst, rd, rn); 1722 case 0x4: //FCVTNU Xd = convertToIntExactTiesToEven(Sn) 1723 return new FcvtFpUIntXSN(machInst, rd, rn); 1724 case 0x5: //FCVTPU Xd = convertToIntExactTowardPlusInf(Sn) 1725 return new FcvtFpUIntXSP(machInst, rd, rn); 1726 case 0x6: //FCVTMU Xd = convertToIntExactTowardMinusInf(Sn) 1727 return new FcvtFpUIntXSM(machInst, rd, rn); 1728 case 0x7: //FCVTZU Xd = convertToIntExactTowardZero(Sn) 1729 return new FcvtFpUIntXSZ(machInst, rd, rn); 1730 case 0x8: //FCVTNU Wd = convertToIntExactTiesToEven(Dn) 1731 return new FcvtFpUIntWDN(machInst, rd, rn); 1732 case 0x9: //FCVTPU Wd = convertToIntExactTowardPlusInf(Dn) 1733 return new FcvtFpUIntWDP(machInst, rd, rn); 1734 case 0xA: //FCVTMU Wd = convertToIntExactTowardMinusInf(Dn) 1735 return new FcvtFpUIntWDM(machInst, rd, rn); 1736 case 0xB: //FCVTZU Wd = convertToIntExactTowardZero(Dn) 1737 return new FcvtFpUIntWDZ(machInst, rd, rn); 1738 case 0xC: //FCVTNU Xd = convertToIntExactTiesToEven(Dn) 1739 return new FcvtFpUIntXDN(machInst, rd, rn); 1740 case 0xD: //FCVTPU Xd = convertToIntExactTowardPlusInf(Dn) 1741 return new FcvtFpUIntXDP(machInst, rd, rn); 1742 case 0xE: //FCVTMU Xd = convertToIntExactTowardMinusInf(Dn) 1743 return new FcvtFpUIntXDM(machInst, rd, rn); 1744 case 0xF: //FCVTZU Xd = convertToIntExactTowardZero(Dn) 1745 return new FcvtFpUIntXDZ(machInst, rd, rn); 1746 default: 1747 return new Unknown64(machInst); 1748 } 1749 case 0x2: 1750 if (rmode != 0) 1751 return new Unknown64(machInst); 1752 switch (switchVal2) { 1753 case 0: // SCVTF Sd = convertFromInt(Wn) 1754 return new FcvtWSIntFpS(machInst, rd, rn); 1755 case 1: // SCVTF Sd = convertFromInt(Xn) 1756 return new FcvtXSIntFpS(machInst, rd, rn); 1757 case 2: // SCVTF Dd = convertFromInt(Wn) 1758 return new FcvtWSIntFpD(machInst, rd, rn); 1759 case 3: // SCVTF Dd = convertFromInt(Xn) 1760 return new FcvtXSIntFpD(machInst, rd, rn); 1761 default: 1762 return new Unknown64(machInst); 1763 } 1764 case 0x3: 1765 switch (switchVal2) { 1766 case 0: // UCVTF Sd = convertFromInt(Wn) 1767 return new FcvtWUIntFpS(machInst, rd, rn); 1768 case 1: // UCVTF Sd = convertFromInt(Xn) 1769 return new FcvtXUIntFpS(machInst, rd, rn); 1770 case 2: // UCVTF Dd = convertFromInt(Wn) 1771 return new FcvtWUIntFpD(machInst, rd, rn); 1772 case 3: // UCVTF Dd = convertFromInt(Xn) 1773 return new FcvtXUIntFpD(machInst, rd, rn); 1774 default: 1775 return new Unknown64(machInst); 1776 } 1777 case 0x4: 1778 if (rmode != 0) 1779 return new Unknown64(machInst); 1780 switch (switchVal2) { 1781 case 0: // FCVTAS Wd = convertToIntExactTiesToAway(Sn) 1782 return new FcvtFpSIntWSA(machInst, rd, rn); 1783 case 1: // FCVTAS Xd = convertToIntExactTiesToAway(Sn) 1784 return new FcvtFpSIntXSA(machInst, rd, rn); 1785 case 2: // FCVTAS Wd = convertToIntExactTiesToAway(Dn) 1786 return new FcvtFpSIntWDA(machInst, rd, rn); 1787 case 3: // FCVTAS Wd = convertToIntExactTiesToAway(Dn) 1788 return new FcvtFpSIntXDA(machInst, rd, rn); 1789 default: 1790 return new Unknown64(machInst); 1791 } 1792 case 0x5: 1793 switch (switchVal2) { 1794 case 0: // FCVTAU Wd = convertToIntExactTiesToAway(Sn) 1795 return new FcvtFpUIntWSA(machInst, rd, rn); 1796 case 1: // FCVTAU Xd = convertToIntExactTiesToAway(Sn) 1797 return new FcvtFpUIntXSA(machInst, rd, rn); 1798 case 2: // FCVTAU Wd = convertToIntExactTiesToAway(Dn) 1799 return new FcvtFpUIntWDA(machInst, rd, rn); 1800 case 3: // FCVTAU Xd = convertToIntExactTiesToAway(Dn) 1801 return new FcvtFpUIntXDA(machInst, rd, rn); 1802 default: 1803 return new Unknown64(machInst); 1804 } 1805 case 0x06: 1806 switch (switchVal2) { 1807 case 0: // FMOV Wd = Sn 1808 if (rmode != 0) 1809 return new Unknown64(machInst); 1810 return new FmovRegCoreW(machInst, rd, rn); 1811 case 3: // FMOV Xd = Dn 1812 if (rmode != 0) 1813 return new Unknown64(machInst); 1814 return new FmovRegCoreX(machInst, rd, rn); 1815 case 5: // FMOV Xd = Vn<127:64> 1816 if (rmode != 1) 1817 return new Unknown64(machInst); 1818 return new FmovURegCoreX(machInst, rd, rn); 1819 default: 1820 return new Unknown64(machInst); 1821 } 1822 break; 1823 case 0x07: 1824 switch (switchVal2) { 1825 case 0: // FMOV Sd = Wn 1826 if (rmode != 0) 1827 return new Unknown64(machInst); 1828 return new FmovCoreRegW(machInst, rd, rn); 1829 case 3: // FMOV Xd = Dn 1830 if (rmode != 0) 1831 return new Unknown64(machInst); 1832 return new FmovCoreRegX(machInst, rd, rn); 1833 case 5: // FMOV Xd = Vn<127:64> 1834 if (rmode != 1) 1835 return new Unknown64(machInst); 1836 return new FmovUCoreRegX(machInst, rd, rn); 1837 default: 1838 return new Unknown64(machInst); 1839 } 1840 break; 1841 default: // Warning! missing cases in switch statement above, that still need to be added 1842 return new Unknown64(machInst); 1843 } 1844 } 1845 case 0x1: 1846 { 1847 if (bits(machInst, 31) || 1848 bits(machInst, 29) || 1849 bits(machInst, 23)) { 1850 return new Unknown64(machInst); 1851 } 1852 IntRegIndex rm = (IntRegIndex)(uint32_t) bits(machInst, 20, 16); 1853 IntRegIndex rn = (IntRegIndex)(uint32_t) bits(machInst, 9, 5); 1854 uint8_t imm = (IntRegIndex)(uint32_t) bits(machInst, 3, 0); 1855 ConditionCode cond = 1856 (ConditionCode)(uint8_t)(bits(machInst, 15, 12)); 1857 uint8_t switchVal = (bits(machInst, 4) << 0) | 1858 (bits(machInst, 22) << 1); 1859 // 31:23=000111100, 21=1, 11:10=01 1860 switch (switchVal) { 1861 case 0x0: 1862 // FCCMP flags = if cond the compareQuiet(Sn,Sm) else #nzcv 1863 return new FCCmpRegS(machInst, rn, rm, cond, imm); 1864 case 0x1: 1865 // FCCMP flags = if cond then compareSignaling(Sn,Sm) 1866 // else #nzcv 1867 return new FCCmpERegS(machInst, rn, rm, cond, imm); 1868 case 0x2: 1869 // FCCMP flags = if cond then compareQuiet(Dn,Dm) else #nzcv 1870 return new FCCmpRegD(machInst, rn, rm, cond, imm); 1871 case 0x3: 1872 // FCCMP flags = if cond then compareSignaling(Dn,Dm) 1873 // else #nzcv 1874 return new FCCmpERegD(machInst, rn, rm, cond, imm); 1875 default: 1876 return new Unknown64(machInst); 1877 } 1878 } 1879 case 0x2: 1880 { 1881 if (bits(machInst, 31) || 1882 bits(machInst, 29) || 1883 bits(machInst, 23)) { 1884 return new Unknown64(machInst); 1885 } 1886 IntRegIndex rd = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 1887 IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 1888 IntRegIndex rm = (IntRegIndex)(uint32_t)bits(machInst, 20, 16); 1889 uint8_t switchVal = (bits(machInst, 15, 12) << 0) | 1890 (bits(machInst, 22) << 4); 1891 switch (switchVal) { 1892 case 0x00: // FMUL Sd = Sn * Sm 1893 return new FMulS(machInst, rd, rn, rm); 1894 case 0x10: // FMUL Dd = Dn * Dm 1895 return new FMulD(machInst, rd, rn, rm); 1896 case 0x01: // FDIV Sd = Sn / Sm 1897 return new FDivS(machInst, rd, rn, rm); 1898 case 0x11: // FDIV Dd = Dn / Dm 1899 return new FDivD(machInst, rd, rn, rm); 1900 case 0x02: // FADD Sd = Sn + Sm 1901 return new FAddS(machInst, rd, rn, rm); 1902 case 0x12: // FADD Dd = Dn + Dm 1903 return new FAddD(machInst, rd, rn, rm); 1904 case 0x03: // FSUB Sd = Sn - Sm 1905 return new FSubS(machInst, rd, rn, rm); 1906 case 0x13: // FSUB Dd = Dn - Dm 1907 return new FSubD(machInst, rd, rn, rm); 1908 case 0x04: // FMAX Sd = max(Sn, Sm) 1909 return new FMaxS(machInst, rd, rn, rm); 1910 case 0x14: // FMAX Dd = max(Dn, Dm) 1911 return new FMaxD(machInst, rd, rn, rm); 1912 case 0x05: // FMIN Sd = min(Sn, Sm) 1913 return new FMinS(machInst, rd, rn, rm); 1914 case 0x15: // FMIN Dd = min(Dn, Dm) 1915 return new FMinD(machInst, rd, rn, rm); 1916 case 0x06: // FMAXNM Sd = maxNum(Sn, Sm) 1917 return new FMaxNMS(machInst, rd, rn, rm); 1918 case 0x16: // FMAXNM Dd = maxNum(Dn, Dm) 1919 return new FMaxNMD(machInst, rd, rn, rm); 1920 case 0x07: // FMINNM Sd = minNum(Sn, Sm) 1921 return new FMinNMS(machInst, rd, rn, rm); 1922 case 0x17: // FMINNM Dd = minNum(Dn, Dm) 1923 return new FMinNMD(machInst, rd, rn, rm); 1924 case 0x08: // FNMUL Sd = -(Sn * Sm) 1925 return new FNMulS(machInst, rd, rn, rm); 1926 case 0x18: // FNMUL Dd = -(Dn * Dm) 1927 return new FNMulD(machInst, rd, rn, rm); 1928 default: 1929 return new Unknown64(machInst); 1930 } 1931 } 1932 case 0x3: 1933 { 1934 if (bits(machInst, 31) || bits(machInst, 29)) 1935 return new Unknown64(machInst); 1936 uint8_t type = bits(machInst, 23, 22); 1937 IntRegIndex rd = (IntRegIndex)(uint32_t)bits(machInst, 4, 0); 1938 IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 9, 5); 1939 IntRegIndex rm = (IntRegIndex)(uint32_t)bits(machInst, 20, 16); 1940 ConditionCode cond = 1941 (ConditionCode)(uint8_t)(bits(machInst, 15, 12)); 1942 if (type == 0) // FCSEL Sd = if cond then Sn else Sm 1943 return new FCSelS(machInst, rd, rn, rm, cond); 1944 else if (type == 1) // FCSEL Dd = if cond then Dn else Dm 1945 return new FCSelD(machInst, rd, rn, rm, cond); 1946 else 1947 return new Unknown64(machInst); 1948 } 1949 } 1950 } 1951 return new FailUnimplemented("Unhandled Case4", machInst); 1952 } 1953} 1954}}; 1955 1956output decoder {{ 1957namespace Aarch64 1958{ 1959 StaticInstPtr 1960 decodeAdvSIMDScalar(ExtMachInst machInst) 1961 { 1962 if (bits(machInst, 24) == 1) { 1963 if (bits(machInst, 10) == 0) { 1964 return decodeNeonScIndexedElem(machInst); 1965 } else if (bits(machInst, 23) == 0) { 1966 return decodeNeonScShiftByImm(machInst); 1967 } 1968 } else if (bits(machInst, 21) == 1) { 1969 if (bits(machInst, 10) == 1) { 1970 return decodeNeonSc3Same(machInst); 1971 } else if (bits(machInst, 11) == 0) { 1972 return decodeNeonSc3Diff(machInst); 1973 } else if (bits(machInst, 20, 17) == 0x0) { 1974 return decodeNeonSc2RegMisc(machInst); 1975 } else if (bits(machInst, 20, 17) == 0x8) { 1976 return decodeNeonScPwise(machInst); 1977 } else { 1978 return new Unknown64(machInst); 1979 } 1980 } else if (bits(machInst, 23, 22) == 0 && 1981 bits(machInst, 15) == 0 && 1982 bits(machInst, 10) == 1) { 1983 return decodeNeonScCopy(machInst); 1984 } else { 1985 return new Unknown64(machInst); 1986 } 1987 return new FailUnimplemented("Unhandled Case6", machInst); 1988 } 1989} 1990}}; 1991 1992output decoder {{ 1993namespace Aarch64 1994{ 1995 template <typename DecoderFeatures> 1996 StaticInstPtr 1997 decodeFpAdvSIMD(ExtMachInst machInst) 1998 { 1999 2000 if (bits(machInst, 28) == 0) { 2001 if (bits(machInst, 31) == 0) { 2002 return decodeAdvSIMD<DecoderFeatures>(machInst); 2003 } else { 2004 return new Unknown64(machInst); 2005 } 2006 } else if (bits(machInst, 30) == 0) { 2007 return decodeFp(machInst); 2008 } else if (bits(machInst, 31) == 0) { 2009 return decodeAdvSIMDScalar(machInst); 2010 } else { 2011 return new Unknown64(machInst); 2012 } 2013 } 2014} 2015}}; 2016 2017let {{ 2018 decoder_output =''' 2019namespace Aarch64 2020{''' 2021 for decoderFlavour, type_dict in decoders.iteritems(): 2022 decoder_output +=''' 2023template StaticInstPtr decodeFpAdvSIMD<%(df)sDecoder>(ExtMachInst machInst); 2024''' % { "df" : decoderFlavour } 2025 decoder_output +=''' 2026}''' 2027}}; 2028 2029output decoder {{ 2030namespace Aarch64 2031{ 2032 StaticInstPtr 2033 decodeGem5Ops(ExtMachInst machInst) 2034 { 2035 const uint32_t m5func = bits(machInst, 23, 16); 2036 switch (m5func) { 2037 case M5OP_ARM: return new Arm(machInst); 2038 case M5OP_QUIESCE: return new Quiesce(machInst); 2039 case M5OP_QUIESCE_NS: return new QuiesceNs64(machInst); 2040 case M5OP_QUIESCE_CYCLE: return new QuiesceCycles64(machInst); 2041 case M5OP_QUIESCE_TIME: return new QuiesceTime64(machInst); 2042 case M5OP_RPNS: return new Rpns64(machInst); 2043 case M5OP_WAKE_CPU: return new WakeCPU64(machInst); 2044 case M5OP_DEPRECATED1: return new Deprecated_ivlb(machInst); 2045 case M5OP_DEPRECATED2: return new Deprecated_ivle(machInst); 2046 case M5OP_DEPRECATED3: return new Deprecated_exit (machInst); 2047 case M5OP_EXIT: return new M5exit64(machInst); 2048 case M5OP_FAIL: return new M5fail64(machInst); 2049 case M5OP_LOAD_SYMBOL: return new Loadsymbol(machInst); 2050 case M5OP_INIT_PARAM: return new Initparam64(machInst); 2051 case M5OP_RESET_STATS: return new Resetstats64(machInst); 2052 case M5OP_DUMP_STATS: return new Dumpstats64(machInst); 2053 case M5OP_DUMP_RESET_STATS: return new Dumpresetstats64(machInst); 2054 case M5OP_CHECKPOINT: return new M5checkpoint64(machInst); 2055 case M5OP_WRITE_FILE: return new M5writefile64(machInst); 2056 case M5OP_READ_FILE: return new M5readfile64(machInst); 2057 case M5OP_DEBUG_BREAK: return new M5break(machInst); 2058 case M5OP_SWITCH_CPU: return new M5switchcpu(machInst); 2059 case M5OP_ADD_SYMBOL: return new M5addsymbol64(machInst); 2060 case M5OP_PANIC: return new M5panic(machInst); 2061 case M5OP_WORK_BEGIN: return new M5workbegin64(machInst); 2062 case M5OP_WORK_END: return new M5workend64(machInst); 2063 default: return new Unknown64(machInst); 2064 } 2065 } 2066} 2067}}; 2068 2069def format Aarch64() {{ 2070 decode_block = ''' 2071 { 2072 using namespace Aarch64; 2073 if (bits(machInst, 27) == 0x0) { 2074 if (bits(machInst, 28) == 0x0) 2075 return new Unknown64(machInst); 2076 else if (bits(machInst, 26) == 0) 2077 // bit 28:26=100 2078 return decodeDataProcImm(machInst); 2079 else 2080 // bit 28:26=101 2081 return decodeBranchExcSys(machInst); 2082 } else if (bits(machInst, 25) == 0) { 2083 // bit 27=1, 25=0 2084 return decodeLoadsStores(machInst); 2085 } else if (bits(machInst, 26) == 0) { 2086 // bit 27:25=101 2087 return decodeDataProcReg(machInst); 2088 } else if (bits(machInst, 24) == 1 && 2089 bits(machInst, 31, 28) == 0xF) { 2090 return decodeGem5Ops(machInst); 2091 } else { 2092 // bit 27:25=111 2093 switch(decoderFlavour){ 2094 default: 2095 return decodeFpAdvSIMD<GenericDecoder>(machInst); 2096 } 2097 } 2098 } 2099 ''' 2100}}; 2101