1 //===- AArch64Disassembler.cpp - Disassembler for AArch64 -------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "AArch64Disassembler.h" 14 #include "AArch64ExternalSymbolizer.h" 15 #include "AArch64Subtarget.h" 16 #include "MCTargetDesc/AArch64AddressingModes.h" 17 #include "Utils/AArch64BaseInfo.h" 18 #include "llvm/MC/MCInst.h" 19 #include "llvm/MC/MCFixedLenDisassembler.h" 20 #include "llvm/Support/Debug.h" 21 #include "llvm/Support/MemoryObject.h" 22 #include "llvm/Support/TargetRegistry.h" 23 #include "llvm/Support/ErrorHandling.h" 24 25 using namespace llvm; 26 27 #define DEBUG_TYPE "aarch64-disassembler" 28 29 // Pull DecodeStatus and its enum values into the global namespace. 30 typedef llvm::MCDisassembler::DecodeStatus DecodeStatus; 31 32 // Forward declare these because the autogenerated code will reference them. 33 // Definitions are further down. 34 static DecodeStatus DecodeFPR128RegisterClass(llvm::MCInst &Inst, 35 unsigned RegNo, uint64_t Address, 36 const void *Decoder); 37 static DecodeStatus DecodeFPR128_loRegisterClass(llvm::MCInst &Inst, 38 unsigned RegNo, 39 uint64_t Address, 40 const void *Decoder); 41 static DecodeStatus DecodeFPR64RegisterClass(llvm::MCInst &Inst, unsigned RegNo, 42 uint64_t Address, 43 const void *Decoder); 44 static DecodeStatus DecodeFPR32RegisterClass(llvm::MCInst &Inst, unsigned RegNo, 45 uint64_t Address, 46 const void *Decoder); 47 static DecodeStatus DecodeFPR16RegisterClass(llvm::MCInst &Inst, unsigned RegNo, 48 uint64_t Address, 49 const void *Decoder); 50 static DecodeStatus DecodeFPR8RegisterClass(llvm::MCInst &Inst, unsigned RegNo, 51 uint64_t Address, 52 const void *Decoder); 53 static DecodeStatus DecodeGPR64RegisterClass(llvm::MCInst &Inst, unsigned RegNo, 54 uint64_t Address, 55 const void *Decoder); 56 static DecodeStatus DecodeGPR64spRegisterClass(llvm::MCInst &Inst, 57 unsigned RegNo, uint64_t Address, 58 const void *Decoder); 59 static DecodeStatus DecodeGPR32RegisterClass(llvm::MCInst &Inst, unsigned RegNo, 60 uint64_t Address, 61 const void *Decoder); 62 static DecodeStatus DecodeGPR32spRegisterClass(llvm::MCInst &Inst, 63 unsigned RegNo, uint64_t Address, 64 const void *Decoder); 65 static DecodeStatus DecodeQQRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 66 uint64_t Address, 67 const void *Decoder); 68 static DecodeStatus DecodeQQQRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 69 uint64_t Address, 70 const void *Decoder); 71 static DecodeStatus DecodeQQQQRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 72 uint64_t Address, 73 const void *Decoder); 74 static DecodeStatus DecodeDDRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 75 uint64_t Address, 76 const void *Decoder); 77 static DecodeStatus DecodeDDDRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 78 uint64_t Address, 79 const void *Decoder); 80 static DecodeStatus DecodeDDDDRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 81 uint64_t Address, 82 const void *Decoder); 83 84 static DecodeStatus DecodeFixedPointScaleImm32(llvm::MCInst &Inst, unsigned Imm, 85 uint64_t Address, 86 const void *Decoder); 87 static DecodeStatus DecodeFixedPointScaleImm64(llvm::MCInst &Inst, unsigned Imm, 88 uint64_t Address, 89 const void *Decoder); 90 static DecodeStatus DecodePCRelLabel19(llvm::MCInst &Inst, unsigned Imm, 91 uint64_t Address, const void *Decoder); 92 static DecodeStatus DecodeMemExtend(llvm::MCInst &Inst, unsigned Imm, 93 uint64_t Address, const void *Decoder); 94 static DecodeStatus DecodeMRSSystemRegister(llvm::MCInst &Inst, unsigned Imm, 95 uint64_t Address, const void *Decoder); 96 static DecodeStatus DecodeMSRSystemRegister(llvm::MCInst &Inst, unsigned Imm, 97 uint64_t Address, const void *Decoder); 98 static DecodeStatus DecodeThreeAddrSRegInstruction(llvm::MCInst &Inst, 99 uint32_t insn, 100 uint64_t Address, 101 const void *Decoder); 102 static DecodeStatus DecodeMoveImmInstruction(llvm::MCInst &Inst, uint32_t insn, 103 uint64_t Address, 104 const void *Decoder); 105 static DecodeStatus DecodeUnsignedLdStInstruction(llvm::MCInst &Inst, 106 uint32_t insn, 107 uint64_t Address, 108 const void *Decoder); 109 static DecodeStatus DecodeSignedLdStInstruction(llvm::MCInst &Inst, 110 uint32_t insn, uint64_t Address, 111 const void *Decoder); 112 static DecodeStatus DecodeExclusiveLdStInstruction(llvm::MCInst &Inst, 113 uint32_t insn, 114 uint64_t Address, 115 const void *Decoder); 116 static DecodeStatus DecodePairLdStInstruction(llvm::MCInst &Inst, uint32_t insn, 117 uint64_t Address, 118 const void *Decoder); 119 static DecodeStatus DecodeAddSubERegInstruction(llvm::MCInst &Inst, 120 uint32_t insn, uint64_t Address, 121 const void *Decoder); 122 static DecodeStatus DecodeLogicalImmInstruction(llvm::MCInst &Inst, 123 uint32_t insn, uint64_t Address, 124 const void *Decoder); 125 static DecodeStatus DecodeModImmInstruction(llvm::MCInst &Inst, uint32_t insn, 126 uint64_t Address, 127 const void *Decoder); 128 static DecodeStatus DecodeModImmTiedInstruction(llvm::MCInst &Inst, 129 uint32_t insn, uint64_t Address, 130 const void *Decoder); 131 static DecodeStatus DecodeAdrInstruction(llvm::MCInst &Inst, uint32_t insn, 132 uint64_t Address, const void *Decoder); 133 static DecodeStatus DecodeBaseAddSubImm(llvm::MCInst &Inst, uint32_t insn, 134 uint64_t Address, const void *Decoder); 135 static DecodeStatus DecodeUnconditionalBranch(llvm::MCInst &Inst, uint32_t insn, 136 uint64_t Address, 137 const void *Decoder); 138 static DecodeStatus DecodeSystemPStateInstruction(llvm::MCInst &Inst, 139 uint32_t insn, 140 uint64_t Address, 141 const void *Decoder); 142 static DecodeStatus DecodeTestAndBranch(llvm::MCInst &Inst, uint32_t insn, 143 uint64_t Address, const void *Decoder); 144 145 static DecodeStatus DecodeFMOVLaneInstruction(llvm::MCInst &Inst, unsigned Insn, 146 uint64_t Address, 147 const void *Decoder); 148 static DecodeStatus DecodeVecShiftR64Imm(llvm::MCInst &Inst, unsigned Imm, 149 uint64_t Addr, const void *Decoder); 150 static DecodeStatus DecodeVecShiftR64ImmNarrow(llvm::MCInst &Inst, unsigned Imm, 151 uint64_t Addr, 152 const void *Decoder); 153 static DecodeStatus DecodeVecShiftR32Imm(llvm::MCInst &Inst, unsigned Imm, 154 uint64_t Addr, const void *Decoder); 155 static DecodeStatus DecodeVecShiftR32ImmNarrow(llvm::MCInst &Inst, unsigned Imm, 156 uint64_t Addr, 157 const void *Decoder); 158 static DecodeStatus DecodeVecShiftR16Imm(llvm::MCInst &Inst, unsigned Imm, 159 uint64_t Addr, const void *Decoder); 160 static DecodeStatus DecodeVecShiftR16ImmNarrow(llvm::MCInst &Inst, unsigned Imm, 161 uint64_t Addr, 162 const void *Decoder); 163 static DecodeStatus DecodeVecShiftR8Imm(llvm::MCInst &Inst, unsigned Imm, 164 uint64_t Addr, const void *Decoder); 165 static DecodeStatus DecodeVecShiftL64Imm(llvm::MCInst &Inst, unsigned Imm, 166 uint64_t Addr, const void *Decoder); 167 static DecodeStatus DecodeVecShiftL32Imm(llvm::MCInst &Inst, unsigned Imm, 168 uint64_t Addr, const void *Decoder); 169 static DecodeStatus DecodeVecShiftL16Imm(llvm::MCInst &Inst, unsigned Imm, 170 uint64_t Addr, const void *Decoder); 171 static DecodeStatus DecodeVecShiftL8Imm(llvm::MCInst &Inst, unsigned Imm, 172 uint64_t Addr, const void *Decoder); 173 174 static bool Check(DecodeStatus &Out, DecodeStatus In) { 175 switch (In) { 176 case MCDisassembler::Success: 177 // Out stays the same. 178 return true; 179 case MCDisassembler::SoftFail: 180 Out = In; 181 return true; 182 case MCDisassembler::Fail: 183 Out = In; 184 return false; 185 } 186 llvm_unreachable("Invalid DecodeStatus!"); 187 } 188 189 #include "AArch64GenDisassemblerTables.inc" 190 #include "AArch64GenInstrInfo.inc" 191 192 #define Success llvm::MCDisassembler::Success 193 #define Fail llvm::MCDisassembler::Fail 194 #define SoftFail llvm::MCDisassembler::SoftFail 195 196 static MCDisassembler *createAArch64Disassembler(const Target &T, 197 const MCSubtargetInfo &STI, 198 MCContext &Ctx) { 199 return new AArch64Disassembler(STI, Ctx); 200 } 201 202 DecodeStatus AArch64Disassembler::getInstruction(MCInst &MI, uint64_t &Size, 203 const MemoryObject &Region, 204 uint64_t Address, 205 raw_ostream &os, 206 raw_ostream &cs) const { 207 CommentStream = &cs; 208 209 uint8_t bytes[4]; 210 211 Size = 0; 212 // We want to read exactly 4 bytes of data. 213 if (Region.readBytes(Address, 4, (uint8_t *)bytes) == -1) 214 return Fail; 215 Size = 4; 216 217 // Encoded as a small-endian 32-bit word in the stream. 218 uint32_t insn = 219 (bytes[3] << 24) | (bytes[2] << 16) | (bytes[1] << 8) | (bytes[0] << 0); 220 221 // Calling the auto-generated decoder function. 222 return decodeInstruction(DecoderTable32, MI, insn, Address, this, STI); 223 } 224 225 static MCSymbolizer * 226 createAArch64ExternalSymbolizer(StringRef TT, LLVMOpInfoCallback GetOpInfo, 227 LLVMSymbolLookupCallback SymbolLookUp, 228 void *DisInfo, MCContext *Ctx, 229 MCRelocationInfo *RelInfo) { 230 return new llvm::AArch64ExternalSymbolizer( 231 *Ctx, 232 std::unique_ptr<MCRelocationInfo>(RelInfo), 233 GetOpInfo, SymbolLookUp, DisInfo); 234 } 235 236 extern "C" void LLVMInitializeAArch64Disassembler() { 237 TargetRegistry::RegisterMCDisassembler(TheAArch64leTarget, 238 createAArch64Disassembler); 239 TargetRegistry::RegisterMCDisassembler(TheAArch64beTarget, 240 createAArch64Disassembler); 241 TargetRegistry::RegisterMCSymbolizer(TheAArch64leTarget, 242 createAArch64ExternalSymbolizer); 243 TargetRegistry::RegisterMCSymbolizer(TheAArch64beTarget, 244 createAArch64ExternalSymbolizer); 245 246 TargetRegistry::RegisterMCDisassembler(TheARM64leTarget, 247 createAArch64Disassembler); 248 TargetRegistry::RegisterMCDisassembler(TheARM64beTarget, 249 createAArch64Disassembler); 250 TargetRegistry::RegisterMCSymbolizer(TheARM64leTarget, 251 createAArch64ExternalSymbolizer); 252 TargetRegistry::RegisterMCSymbolizer(TheARM64beTarget, 253 createAArch64ExternalSymbolizer); 254 } 255 256 static const unsigned FPR128DecoderTable[] = { 257 AArch64::Q0, AArch64::Q1, AArch64::Q2, AArch64::Q3, AArch64::Q4, 258 AArch64::Q5, AArch64::Q6, AArch64::Q7, AArch64::Q8, AArch64::Q9, 259 AArch64::Q10, AArch64::Q11, AArch64::Q12, AArch64::Q13, AArch64::Q14, 260 AArch64::Q15, AArch64::Q16, AArch64::Q17, AArch64::Q18, AArch64::Q19, 261 AArch64::Q20, AArch64::Q21, AArch64::Q22, AArch64::Q23, AArch64::Q24, 262 AArch64::Q25, AArch64::Q26, AArch64::Q27, AArch64::Q28, AArch64::Q29, 263 AArch64::Q30, AArch64::Q31 264 }; 265 266 static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo, 267 uint64_t Addr, 268 const void *Decoder) { 269 if (RegNo > 31) 270 return Fail; 271 272 unsigned Register = FPR128DecoderTable[RegNo]; 273 Inst.addOperand(MCOperand::CreateReg(Register)); 274 return Success; 275 } 276 277 static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo, 278 uint64_t Addr, 279 const void *Decoder) { 280 if (RegNo > 15) 281 return Fail; 282 return DecodeFPR128RegisterClass(Inst, RegNo, Addr, Decoder); 283 } 284 285 static const unsigned FPR64DecoderTable[] = { 286 AArch64::D0, AArch64::D1, AArch64::D2, AArch64::D3, AArch64::D4, 287 AArch64::D5, AArch64::D6, AArch64::D7, AArch64::D8, AArch64::D9, 288 AArch64::D10, AArch64::D11, AArch64::D12, AArch64::D13, AArch64::D14, 289 AArch64::D15, AArch64::D16, AArch64::D17, AArch64::D18, AArch64::D19, 290 AArch64::D20, AArch64::D21, AArch64::D22, AArch64::D23, AArch64::D24, 291 AArch64::D25, AArch64::D26, AArch64::D27, AArch64::D28, AArch64::D29, 292 AArch64::D30, AArch64::D31 293 }; 294 295 static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo, 296 uint64_t Addr, 297 const void *Decoder) { 298 if (RegNo > 31) 299 return Fail; 300 301 unsigned Register = FPR64DecoderTable[RegNo]; 302 Inst.addOperand(MCOperand::CreateReg(Register)); 303 return Success; 304 } 305 306 static const unsigned FPR32DecoderTable[] = { 307 AArch64::S0, AArch64::S1, AArch64::S2, AArch64::S3, AArch64::S4, 308 AArch64::S5, AArch64::S6, AArch64::S7, AArch64::S8, AArch64::S9, 309 AArch64::S10, AArch64::S11, AArch64::S12, AArch64::S13, AArch64::S14, 310 AArch64::S15, AArch64::S16, AArch64::S17, AArch64::S18, AArch64::S19, 311 AArch64::S20, AArch64::S21, AArch64::S22, AArch64::S23, AArch64::S24, 312 AArch64::S25, AArch64::S26, AArch64::S27, AArch64::S28, AArch64::S29, 313 AArch64::S30, AArch64::S31 314 }; 315 316 static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo, 317 uint64_t Addr, 318 const void *Decoder) { 319 if (RegNo > 31) 320 return Fail; 321 322 unsigned Register = FPR32DecoderTable[RegNo]; 323 Inst.addOperand(MCOperand::CreateReg(Register)); 324 return Success; 325 } 326 327 static const unsigned FPR16DecoderTable[] = { 328 AArch64::H0, AArch64::H1, AArch64::H2, AArch64::H3, AArch64::H4, 329 AArch64::H5, AArch64::H6, AArch64::H7, AArch64::H8, AArch64::H9, 330 AArch64::H10, AArch64::H11, AArch64::H12, AArch64::H13, AArch64::H14, 331 AArch64::H15, AArch64::H16, AArch64::H17, AArch64::H18, AArch64::H19, 332 AArch64::H20, AArch64::H21, AArch64::H22, AArch64::H23, AArch64::H24, 333 AArch64::H25, AArch64::H26, AArch64::H27, AArch64::H28, AArch64::H29, 334 AArch64::H30, AArch64::H31 335 }; 336 337 static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo, 338 uint64_t Addr, 339 const void *Decoder) { 340 if (RegNo > 31) 341 return Fail; 342 343 unsigned Register = FPR16DecoderTable[RegNo]; 344 Inst.addOperand(MCOperand::CreateReg(Register)); 345 return Success; 346 } 347 348 static const unsigned FPR8DecoderTable[] = { 349 AArch64::B0, AArch64::B1, AArch64::B2, AArch64::B3, AArch64::B4, 350 AArch64::B5, AArch64::B6, AArch64::B7, AArch64::B8, AArch64::B9, 351 AArch64::B10, AArch64::B11, AArch64::B12, AArch64::B13, AArch64::B14, 352 AArch64::B15, AArch64::B16, AArch64::B17, AArch64::B18, AArch64::B19, 353 AArch64::B20, AArch64::B21, AArch64::B22, AArch64::B23, AArch64::B24, 354 AArch64::B25, AArch64::B26, AArch64::B27, AArch64::B28, AArch64::B29, 355 AArch64::B30, AArch64::B31 356 }; 357 358 static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo, 359 uint64_t Addr, 360 const void *Decoder) { 361 if (RegNo > 31) 362 return Fail; 363 364 unsigned Register = FPR8DecoderTable[RegNo]; 365 Inst.addOperand(MCOperand::CreateReg(Register)); 366 return Success; 367 } 368 369 static const unsigned GPR64DecoderTable[] = { 370 AArch64::X0, AArch64::X1, AArch64::X2, AArch64::X3, AArch64::X4, 371 AArch64::X5, AArch64::X6, AArch64::X7, AArch64::X8, AArch64::X9, 372 AArch64::X10, AArch64::X11, AArch64::X12, AArch64::X13, AArch64::X14, 373 AArch64::X15, AArch64::X16, AArch64::X17, AArch64::X18, AArch64::X19, 374 AArch64::X20, AArch64::X21, AArch64::X22, AArch64::X23, AArch64::X24, 375 AArch64::X25, AArch64::X26, AArch64::X27, AArch64::X28, AArch64::FP, 376 AArch64::LR, AArch64::XZR 377 }; 378 379 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo, 380 uint64_t Addr, 381 const void *Decoder) { 382 if (RegNo > 31) 383 return Fail; 384 385 unsigned Register = GPR64DecoderTable[RegNo]; 386 Inst.addOperand(MCOperand::CreateReg(Register)); 387 return Success; 388 } 389 390 static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo, 391 uint64_t Addr, 392 const void *Decoder) { 393 if (RegNo > 31) 394 return Fail; 395 unsigned Register = GPR64DecoderTable[RegNo]; 396 if (Register == AArch64::XZR) 397 Register = AArch64::SP; 398 Inst.addOperand(MCOperand::CreateReg(Register)); 399 return Success; 400 } 401 402 static const unsigned GPR32DecoderTable[] = { 403 AArch64::W0, AArch64::W1, AArch64::W2, AArch64::W3, AArch64::W4, 404 AArch64::W5, AArch64::W6, AArch64::W7, AArch64::W8, AArch64::W9, 405 AArch64::W10, AArch64::W11, AArch64::W12, AArch64::W13, AArch64::W14, 406 AArch64::W15, AArch64::W16, AArch64::W17, AArch64::W18, AArch64::W19, 407 AArch64::W20, AArch64::W21, AArch64::W22, AArch64::W23, AArch64::W24, 408 AArch64::W25, AArch64::W26, AArch64::W27, AArch64::W28, AArch64::W29, 409 AArch64::W30, AArch64::WZR 410 }; 411 412 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo, 413 uint64_t Addr, 414 const void *Decoder) { 415 if (RegNo > 31) 416 return Fail; 417 418 unsigned Register = GPR32DecoderTable[RegNo]; 419 Inst.addOperand(MCOperand::CreateReg(Register)); 420 return Success; 421 } 422 423 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo, 424 uint64_t Addr, 425 const void *Decoder) { 426 if (RegNo > 31) 427 return Fail; 428 429 unsigned Register = GPR32DecoderTable[RegNo]; 430 if (Register == AArch64::WZR) 431 Register = AArch64::WSP; 432 Inst.addOperand(MCOperand::CreateReg(Register)); 433 return Success; 434 } 435 436 static const unsigned VectorDecoderTable[] = { 437 AArch64::Q0, AArch64::Q1, AArch64::Q2, AArch64::Q3, AArch64::Q4, 438 AArch64::Q5, AArch64::Q6, AArch64::Q7, AArch64::Q8, AArch64::Q9, 439 AArch64::Q10, AArch64::Q11, AArch64::Q12, AArch64::Q13, AArch64::Q14, 440 AArch64::Q15, AArch64::Q16, AArch64::Q17, AArch64::Q18, AArch64::Q19, 441 AArch64::Q20, AArch64::Q21, AArch64::Q22, AArch64::Q23, AArch64::Q24, 442 AArch64::Q25, AArch64::Q26, AArch64::Q27, AArch64::Q28, AArch64::Q29, 443 AArch64::Q30, AArch64::Q31 444 }; 445 446 static DecodeStatus DecodeVectorRegisterClass(MCInst &Inst, unsigned RegNo, 447 uint64_t Addr, 448 const void *Decoder) { 449 if (RegNo > 31) 450 return Fail; 451 452 unsigned Register = VectorDecoderTable[RegNo]; 453 Inst.addOperand(MCOperand::CreateReg(Register)); 454 return Success; 455 } 456 457 static const unsigned QQDecoderTable[] = { 458 AArch64::Q0_Q1, AArch64::Q1_Q2, AArch64::Q2_Q3, AArch64::Q3_Q4, 459 AArch64::Q4_Q5, AArch64::Q5_Q6, AArch64::Q6_Q7, AArch64::Q7_Q8, 460 AArch64::Q8_Q9, AArch64::Q9_Q10, AArch64::Q10_Q11, AArch64::Q11_Q12, 461 AArch64::Q12_Q13, AArch64::Q13_Q14, AArch64::Q14_Q15, AArch64::Q15_Q16, 462 AArch64::Q16_Q17, AArch64::Q17_Q18, AArch64::Q18_Q19, AArch64::Q19_Q20, 463 AArch64::Q20_Q21, AArch64::Q21_Q22, AArch64::Q22_Q23, AArch64::Q23_Q24, 464 AArch64::Q24_Q25, AArch64::Q25_Q26, AArch64::Q26_Q27, AArch64::Q27_Q28, 465 AArch64::Q28_Q29, AArch64::Q29_Q30, AArch64::Q30_Q31, AArch64::Q31_Q0 466 }; 467 468 static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo, 469 uint64_t Addr, const void *Decoder) { 470 if (RegNo > 31) 471 return Fail; 472 unsigned Register = QQDecoderTable[RegNo]; 473 Inst.addOperand(MCOperand::CreateReg(Register)); 474 return Success; 475 } 476 477 static const unsigned QQQDecoderTable[] = { 478 AArch64::Q0_Q1_Q2, AArch64::Q1_Q2_Q3, AArch64::Q2_Q3_Q4, 479 AArch64::Q3_Q4_Q5, AArch64::Q4_Q5_Q6, AArch64::Q5_Q6_Q7, 480 AArch64::Q6_Q7_Q8, AArch64::Q7_Q8_Q9, AArch64::Q8_Q9_Q10, 481 AArch64::Q9_Q10_Q11, AArch64::Q10_Q11_Q12, AArch64::Q11_Q12_Q13, 482 AArch64::Q12_Q13_Q14, AArch64::Q13_Q14_Q15, AArch64::Q14_Q15_Q16, 483 AArch64::Q15_Q16_Q17, AArch64::Q16_Q17_Q18, AArch64::Q17_Q18_Q19, 484 AArch64::Q18_Q19_Q20, AArch64::Q19_Q20_Q21, AArch64::Q20_Q21_Q22, 485 AArch64::Q21_Q22_Q23, AArch64::Q22_Q23_Q24, AArch64::Q23_Q24_Q25, 486 AArch64::Q24_Q25_Q26, AArch64::Q25_Q26_Q27, AArch64::Q26_Q27_Q28, 487 AArch64::Q27_Q28_Q29, AArch64::Q28_Q29_Q30, AArch64::Q29_Q30_Q31, 488 AArch64::Q30_Q31_Q0, AArch64::Q31_Q0_Q1 489 }; 490 491 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo, 492 uint64_t Addr, const void *Decoder) { 493 if (RegNo > 31) 494 return Fail; 495 unsigned Register = QQQDecoderTable[RegNo]; 496 Inst.addOperand(MCOperand::CreateReg(Register)); 497 return Success; 498 } 499 500 static const unsigned QQQQDecoderTable[] = { 501 AArch64::Q0_Q1_Q2_Q3, AArch64::Q1_Q2_Q3_Q4, AArch64::Q2_Q3_Q4_Q5, 502 AArch64::Q3_Q4_Q5_Q6, AArch64::Q4_Q5_Q6_Q7, AArch64::Q5_Q6_Q7_Q8, 503 AArch64::Q6_Q7_Q8_Q9, AArch64::Q7_Q8_Q9_Q10, AArch64::Q8_Q9_Q10_Q11, 504 AArch64::Q9_Q10_Q11_Q12, AArch64::Q10_Q11_Q12_Q13, AArch64::Q11_Q12_Q13_Q14, 505 AArch64::Q12_Q13_Q14_Q15, AArch64::Q13_Q14_Q15_Q16, AArch64::Q14_Q15_Q16_Q17, 506 AArch64::Q15_Q16_Q17_Q18, AArch64::Q16_Q17_Q18_Q19, AArch64::Q17_Q18_Q19_Q20, 507 AArch64::Q18_Q19_Q20_Q21, AArch64::Q19_Q20_Q21_Q22, AArch64::Q20_Q21_Q22_Q23, 508 AArch64::Q21_Q22_Q23_Q24, AArch64::Q22_Q23_Q24_Q25, AArch64::Q23_Q24_Q25_Q26, 509 AArch64::Q24_Q25_Q26_Q27, AArch64::Q25_Q26_Q27_Q28, AArch64::Q26_Q27_Q28_Q29, 510 AArch64::Q27_Q28_Q29_Q30, AArch64::Q28_Q29_Q30_Q31, AArch64::Q29_Q30_Q31_Q0, 511 AArch64::Q30_Q31_Q0_Q1, AArch64::Q31_Q0_Q1_Q2 512 }; 513 514 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo, 515 uint64_t Addr, 516 const void *Decoder) { 517 if (RegNo > 31) 518 return Fail; 519 unsigned Register = QQQQDecoderTable[RegNo]; 520 Inst.addOperand(MCOperand::CreateReg(Register)); 521 return Success; 522 } 523 524 static const unsigned DDDecoderTable[] = { 525 AArch64::D0_D1, AArch64::D1_D2, AArch64::D2_D3, AArch64::D3_D4, 526 AArch64::D4_D5, AArch64::D5_D6, AArch64::D6_D7, AArch64::D7_D8, 527 AArch64::D8_D9, AArch64::D9_D10, AArch64::D10_D11, AArch64::D11_D12, 528 AArch64::D12_D13, AArch64::D13_D14, AArch64::D14_D15, AArch64::D15_D16, 529 AArch64::D16_D17, AArch64::D17_D18, AArch64::D18_D19, AArch64::D19_D20, 530 AArch64::D20_D21, AArch64::D21_D22, AArch64::D22_D23, AArch64::D23_D24, 531 AArch64::D24_D25, AArch64::D25_D26, AArch64::D26_D27, AArch64::D27_D28, 532 AArch64::D28_D29, AArch64::D29_D30, AArch64::D30_D31, AArch64::D31_D0 533 }; 534 535 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo, 536 uint64_t Addr, const void *Decoder) { 537 if (RegNo > 31) 538 return Fail; 539 unsigned Register = DDDecoderTable[RegNo]; 540 Inst.addOperand(MCOperand::CreateReg(Register)); 541 return Success; 542 } 543 544 static const unsigned DDDDecoderTable[] = { 545 AArch64::D0_D1_D2, AArch64::D1_D2_D3, AArch64::D2_D3_D4, 546 AArch64::D3_D4_D5, AArch64::D4_D5_D6, AArch64::D5_D6_D7, 547 AArch64::D6_D7_D8, AArch64::D7_D8_D9, AArch64::D8_D9_D10, 548 AArch64::D9_D10_D11, AArch64::D10_D11_D12, AArch64::D11_D12_D13, 549 AArch64::D12_D13_D14, AArch64::D13_D14_D15, AArch64::D14_D15_D16, 550 AArch64::D15_D16_D17, AArch64::D16_D17_D18, AArch64::D17_D18_D19, 551 AArch64::D18_D19_D20, AArch64::D19_D20_D21, AArch64::D20_D21_D22, 552 AArch64::D21_D22_D23, AArch64::D22_D23_D24, AArch64::D23_D24_D25, 553 AArch64::D24_D25_D26, AArch64::D25_D26_D27, AArch64::D26_D27_D28, 554 AArch64::D27_D28_D29, AArch64::D28_D29_D30, AArch64::D29_D30_D31, 555 AArch64::D30_D31_D0, AArch64::D31_D0_D1 556 }; 557 558 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo, 559 uint64_t Addr, const void *Decoder) { 560 if (RegNo > 31) 561 return Fail; 562 unsigned Register = DDDDecoderTable[RegNo]; 563 Inst.addOperand(MCOperand::CreateReg(Register)); 564 return Success; 565 } 566 567 static const unsigned DDDDDecoderTable[] = { 568 AArch64::D0_D1_D2_D3, AArch64::D1_D2_D3_D4, AArch64::D2_D3_D4_D5, 569 AArch64::D3_D4_D5_D6, AArch64::D4_D5_D6_D7, AArch64::D5_D6_D7_D8, 570 AArch64::D6_D7_D8_D9, AArch64::D7_D8_D9_D10, AArch64::D8_D9_D10_D11, 571 AArch64::D9_D10_D11_D12, AArch64::D10_D11_D12_D13, AArch64::D11_D12_D13_D14, 572 AArch64::D12_D13_D14_D15, AArch64::D13_D14_D15_D16, AArch64::D14_D15_D16_D17, 573 AArch64::D15_D16_D17_D18, AArch64::D16_D17_D18_D19, AArch64::D17_D18_D19_D20, 574 AArch64::D18_D19_D20_D21, AArch64::D19_D20_D21_D22, AArch64::D20_D21_D22_D23, 575 AArch64::D21_D22_D23_D24, AArch64::D22_D23_D24_D25, AArch64::D23_D24_D25_D26, 576 AArch64::D24_D25_D26_D27, AArch64::D25_D26_D27_D28, AArch64::D26_D27_D28_D29, 577 AArch64::D27_D28_D29_D30, AArch64::D28_D29_D30_D31, AArch64::D29_D30_D31_D0, 578 AArch64::D30_D31_D0_D1, AArch64::D31_D0_D1_D2 579 }; 580 581 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo, 582 uint64_t Addr, 583 const void *Decoder) { 584 if (RegNo > 31) 585 return Fail; 586 unsigned Register = DDDDDecoderTable[RegNo]; 587 Inst.addOperand(MCOperand::CreateReg(Register)); 588 return Success; 589 } 590 591 static DecodeStatus DecodeFixedPointScaleImm32(llvm::MCInst &Inst, unsigned Imm, 592 uint64_t Addr, 593 const void *Decoder) { 594 // scale{5} is asserted as 1 in tblgen. 595 Imm |= 0x20; 596 Inst.addOperand(MCOperand::CreateImm(64 - Imm)); 597 return Success; 598 } 599 600 static DecodeStatus DecodeFixedPointScaleImm64(llvm::MCInst &Inst, unsigned Imm, 601 uint64_t Addr, 602 const void *Decoder) { 603 Inst.addOperand(MCOperand::CreateImm(64 - Imm)); 604 return Success; 605 } 606 607 static DecodeStatus DecodePCRelLabel19(llvm::MCInst &Inst, unsigned Imm, 608 uint64_t Addr, const void *Decoder) { 609 int64_t ImmVal = Imm; 610 const AArch64Disassembler *Dis = 611 static_cast<const AArch64Disassembler *>(Decoder); 612 613 // Sign-extend 19-bit immediate. 614 if (ImmVal & (1 << (19 - 1))) 615 ImmVal |= ~((1LL << 19) - 1); 616 617 if (!Dis->tryAddingSymbolicOperand(Inst, ImmVal << 2, Addr, 618 Inst.getOpcode() != AArch64::LDRXl, 0, 4)) 619 Inst.addOperand(MCOperand::CreateImm(ImmVal)); 620 return Success; 621 } 622 623 static DecodeStatus DecodeMemExtend(llvm::MCInst &Inst, unsigned Imm, 624 uint64_t Address, const void *Decoder) { 625 Inst.addOperand(MCOperand::CreateImm((Imm >> 1) & 1)); 626 Inst.addOperand(MCOperand::CreateImm(Imm & 1)); 627 return Success; 628 } 629 630 static DecodeStatus DecodeMRSSystemRegister(llvm::MCInst &Inst, unsigned Imm, 631 uint64_t Address, 632 const void *Decoder) { 633 const AArch64Disassembler *Dis = 634 static_cast<const AArch64Disassembler *>(Decoder); 635 const MCSubtargetInfo &STI = Dis->getSubtargetInfo(); 636 637 Imm |= 0x8000; 638 Inst.addOperand(MCOperand::CreateImm(Imm)); 639 640 bool ValidNamed; 641 (void)AArch64SysReg::MRSMapper(STI.getFeatureBits()) 642 .toString(Imm, ValidNamed); 643 644 return ValidNamed ? Success : Fail; 645 } 646 647 static DecodeStatus DecodeMSRSystemRegister(llvm::MCInst &Inst, unsigned Imm, 648 uint64_t Address, 649 const void *Decoder) { 650 const AArch64Disassembler *Dis = 651 static_cast<const AArch64Disassembler *>(Decoder); 652 const MCSubtargetInfo &STI = Dis->getSubtargetInfo(); 653 654 Imm |= 0x8000; 655 Inst.addOperand(MCOperand::CreateImm(Imm)); 656 657 bool ValidNamed; 658 (void)AArch64SysReg::MSRMapper(STI.getFeatureBits()) 659 .toString(Imm, ValidNamed); 660 661 return ValidNamed ? Success : Fail; 662 } 663 664 static DecodeStatus DecodeFMOVLaneInstruction(llvm::MCInst &Inst, unsigned Insn, 665 uint64_t Address, 666 const void *Decoder) { 667 // This decoder exists to add the dummy Lane operand to the MCInst, which must 668 // be 1 in assembly but has no other real manifestation. 669 unsigned Rd = fieldFromInstruction(Insn, 0, 5); 670 unsigned Rn = fieldFromInstruction(Insn, 5, 5); 671 unsigned IsToVec = fieldFromInstruction(Insn, 16, 1); 672 673 if (IsToVec) { 674 DecodeFPR128RegisterClass(Inst, Rd, Address, Decoder); 675 DecodeGPR64RegisterClass(Inst, Rn, Address, Decoder); 676 } else { 677 DecodeGPR64RegisterClass(Inst, Rd, Address, Decoder); 678 DecodeFPR128RegisterClass(Inst, Rn, Address, Decoder); 679 } 680 681 // Add the lane 682 Inst.addOperand(MCOperand::CreateImm(1)); 683 684 return Success; 685 } 686 687 static DecodeStatus DecodeVecShiftRImm(llvm::MCInst &Inst, unsigned Imm, 688 unsigned Add) { 689 Inst.addOperand(MCOperand::CreateImm(Add - Imm)); 690 return Success; 691 } 692 693 static DecodeStatus DecodeVecShiftLImm(llvm::MCInst &Inst, unsigned Imm, 694 unsigned Add) { 695 Inst.addOperand(MCOperand::CreateImm((Imm + Add) & (Add - 1))); 696 return Success; 697 } 698 699 static DecodeStatus DecodeVecShiftR64Imm(llvm::MCInst &Inst, unsigned Imm, 700 uint64_t Addr, const void *Decoder) { 701 return DecodeVecShiftRImm(Inst, Imm, 64); 702 } 703 704 static DecodeStatus DecodeVecShiftR64ImmNarrow(llvm::MCInst &Inst, unsigned Imm, 705 uint64_t Addr, 706 const void *Decoder) { 707 return DecodeVecShiftRImm(Inst, Imm | 0x20, 64); 708 } 709 710 static DecodeStatus DecodeVecShiftR32Imm(llvm::MCInst &Inst, unsigned Imm, 711 uint64_t Addr, const void *Decoder) { 712 return DecodeVecShiftRImm(Inst, Imm, 32); 713 } 714 715 static DecodeStatus DecodeVecShiftR32ImmNarrow(llvm::MCInst &Inst, unsigned Imm, 716 uint64_t Addr, 717 const void *Decoder) { 718 return DecodeVecShiftRImm(Inst, Imm | 0x10, 32); 719 } 720 721 static DecodeStatus DecodeVecShiftR16Imm(llvm::MCInst &Inst, unsigned Imm, 722 uint64_t Addr, const void *Decoder) { 723 return DecodeVecShiftRImm(Inst, Imm, 16); 724 } 725 726 static DecodeStatus DecodeVecShiftR16ImmNarrow(llvm::MCInst &Inst, unsigned Imm, 727 uint64_t Addr, 728 const void *Decoder) { 729 return DecodeVecShiftRImm(Inst, Imm | 0x8, 16); 730 } 731 732 static DecodeStatus DecodeVecShiftR8Imm(llvm::MCInst &Inst, unsigned Imm, 733 uint64_t Addr, const void *Decoder) { 734 return DecodeVecShiftRImm(Inst, Imm, 8); 735 } 736 737 static DecodeStatus DecodeVecShiftL64Imm(llvm::MCInst &Inst, unsigned Imm, 738 uint64_t Addr, const void *Decoder) { 739 return DecodeVecShiftLImm(Inst, Imm, 64); 740 } 741 742 static DecodeStatus DecodeVecShiftL32Imm(llvm::MCInst &Inst, unsigned Imm, 743 uint64_t Addr, const void *Decoder) { 744 return DecodeVecShiftLImm(Inst, Imm, 32); 745 } 746 747 static DecodeStatus DecodeVecShiftL16Imm(llvm::MCInst &Inst, unsigned Imm, 748 uint64_t Addr, const void *Decoder) { 749 return DecodeVecShiftLImm(Inst, Imm, 16); 750 } 751 752 static DecodeStatus DecodeVecShiftL8Imm(llvm::MCInst &Inst, unsigned Imm, 753 uint64_t Addr, const void *Decoder) { 754 return DecodeVecShiftLImm(Inst, Imm, 8); 755 } 756 757 static DecodeStatus DecodeThreeAddrSRegInstruction(llvm::MCInst &Inst, 758 uint32_t insn, uint64_t Addr, 759 const void *Decoder) { 760 unsigned Rd = fieldFromInstruction(insn, 0, 5); 761 unsigned Rn = fieldFromInstruction(insn, 5, 5); 762 unsigned Rm = fieldFromInstruction(insn, 16, 5); 763 unsigned shiftHi = fieldFromInstruction(insn, 22, 2); 764 unsigned shiftLo = fieldFromInstruction(insn, 10, 6); 765 unsigned shift = (shiftHi << 6) | shiftLo; 766 switch (Inst.getOpcode()) { 767 default: 768 return Fail; 769 case AArch64::ADDWrs: 770 case AArch64::ADDSWrs: 771 case AArch64::SUBWrs: 772 case AArch64::SUBSWrs: 773 // if shift == '11' then ReservedValue() 774 if (shiftHi == 0x3) 775 return Fail; 776 // Deliberate fallthrough 777 case AArch64::ANDWrs: 778 case AArch64::ANDSWrs: 779 case AArch64::BICWrs: 780 case AArch64::BICSWrs: 781 case AArch64::ORRWrs: 782 case AArch64::ORNWrs: 783 case AArch64::EORWrs: 784 case AArch64::EONWrs: { 785 // if sf == '0' and imm6<5> == '1' then ReservedValue() 786 if (shiftLo >> 5 == 1) 787 return Fail; 788 DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); 789 DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder); 790 DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); 791 break; 792 } 793 case AArch64::ADDXrs: 794 case AArch64::ADDSXrs: 795 case AArch64::SUBXrs: 796 case AArch64::SUBSXrs: 797 // if shift == '11' then ReservedValue() 798 if (shiftHi == 0x3) 799 return Fail; 800 // Deliberate fallthrough 801 case AArch64::ANDXrs: 802 case AArch64::ANDSXrs: 803 case AArch64::BICXrs: 804 case AArch64::BICSXrs: 805 case AArch64::ORRXrs: 806 case AArch64::ORNXrs: 807 case AArch64::EORXrs: 808 case AArch64::EONXrs: 809 DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); 810 DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder); 811 DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder); 812 break; 813 } 814 815 Inst.addOperand(MCOperand::CreateImm(shift)); 816 return Success; 817 } 818 819 static DecodeStatus DecodeMoveImmInstruction(llvm::MCInst &Inst, uint32_t insn, 820 uint64_t Addr, 821 const void *Decoder) { 822 unsigned Rd = fieldFromInstruction(insn, 0, 5); 823 unsigned imm = fieldFromInstruction(insn, 5, 16); 824 unsigned shift = fieldFromInstruction(insn, 21, 2); 825 shift <<= 4; 826 switch (Inst.getOpcode()) { 827 default: 828 return Fail; 829 case AArch64::MOVZWi: 830 case AArch64::MOVNWi: 831 case AArch64::MOVKWi: 832 if (shift & (1U << 5)) 833 return Fail; 834 DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); 835 break; 836 case AArch64::MOVZXi: 837 case AArch64::MOVNXi: 838 case AArch64::MOVKXi: 839 DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); 840 break; 841 } 842 843 if (Inst.getOpcode() == AArch64::MOVKWi || 844 Inst.getOpcode() == AArch64::MOVKXi) 845 Inst.addOperand(Inst.getOperand(0)); 846 847 Inst.addOperand(MCOperand::CreateImm(imm)); 848 Inst.addOperand(MCOperand::CreateImm(shift)); 849 return Success; 850 } 851 852 static DecodeStatus DecodeUnsignedLdStInstruction(llvm::MCInst &Inst, 853 uint32_t insn, uint64_t Addr, 854 const void *Decoder) { 855 unsigned Rt = fieldFromInstruction(insn, 0, 5); 856 unsigned Rn = fieldFromInstruction(insn, 5, 5); 857 unsigned offset = fieldFromInstruction(insn, 10, 12); 858 const AArch64Disassembler *Dis = 859 static_cast<const AArch64Disassembler *>(Decoder); 860 861 switch (Inst.getOpcode()) { 862 default: 863 return Fail; 864 case AArch64::PRFMui: 865 // Rt is an immediate in prefetch. 866 Inst.addOperand(MCOperand::CreateImm(Rt)); 867 break; 868 case AArch64::STRBBui: 869 case AArch64::LDRBBui: 870 case AArch64::LDRSBWui: 871 case AArch64::STRHHui: 872 case AArch64::LDRHHui: 873 case AArch64::LDRSHWui: 874 case AArch64::STRWui: 875 case AArch64::LDRWui: 876 DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); 877 break; 878 case AArch64::LDRSBXui: 879 case AArch64::LDRSHXui: 880 case AArch64::LDRSWui: 881 case AArch64::STRXui: 882 case AArch64::LDRXui: 883 DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); 884 break; 885 case AArch64::LDRQui: 886 case AArch64::STRQui: 887 DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder); 888 break; 889 case AArch64::LDRDui: 890 case AArch64::STRDui: 891 DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder); 892 break; 893 case AArch64::LDRSui: 894 case AArch64::STRSui: 895 DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder); 896 break; 897 case AArch64::LDRHui: 898 case AArch64::STRHui: 899 DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder); 900 break; 901 case AArch64::LDRBui: 902 case AArch64::STRBui: 903 DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder); 904 break; 905 } 906 907 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 908 if (!Dis->tryAddingSymbolicOperand(Inst, offset, Addr, Fail, 0, 4)) 909 Inst.addOperand(MCOperand::CreateImm(offset)); 910 return Success; 911 } 912 913 static DecodeStatus DecodeSignedLdStInstruction(llvm::MCInst &Inst, 914 uint32_t insn, uint64_t Addr, 915 const void *Decoder) { 916 unsigned Rt = fieldFromInstruction(insn, 0, 5); 917 unsigned Rn = fieldFromInstruction(insn, 5, 5); 918 int64_t offset = fieldFromInstruction(insn, 12, 9); 919 920 // offset is a 9-bit signed immediate, so sign extend it to 921 // fill the unsigned. 922 if (offset & (1 << (9 - 1))) 923 offset |= ~((1LL << 9) - 1); 924 925 // First operand is always the writeback to the address register, if needed. 926 switch (Inst.getOpcode()) { 927 default: 928 break; 929 case AArch64::LDRSBWpre: 930 case AArch64::LDRSHWpre: 931 case AArch64::STRBBpre: 932 case AArch64::LDRBBpre: 933 case AArch64::STRHHpre: 934 case AArch64::LDRHHpre: 935 case AArch64::STRWpre: 936 case AArch64::LDRWpre: 937 case AArch64::LDRSBWpost: 938 case AArch64::LDRSHWpost: 939 case AArch64::STRBBpost: 940 case AArch64::LDRBBpost: 941 case AArch64::STRHHpost: 942 case AArch64::LDRHHpost: 943 case AArch64::STRWpost: 944 case AArch64::LDRWpost: 945 case AArch64::LDRSBXpre: 946 case AArch64::LDRSHXpre: 947 case AArch64::STRXpre: 948 case AArch64::LDRSWpre: 949 case AArch64::LDRXpre: 950 case AArch64::LDRSBXpost: 951 case AArch64::LDRSHXpost: 952 case AArch64::STRXpost: 953 case AArch64::LDRSWpost: 954 case AArch64::LDRXpost: 955 case AArch64::LDRQpre: 956 case AArch64::STRQpre: 957 case AArch64::LDRQpost: 958 case AArch64::STRQpost: 959 case AArch64::LDRDpre: 960 case AArch64::STRDpre: 961 case AArch64::LDRDpost: 962 case AArch64::STRDpost: 963 case AArch64::LDRSpre: 964 case AArch64::STRSpre: 965 case AArch64::LDRSpost: 966 case AArch64::STRSpost: 967 case AArch64::LDRHpre: 968 case AArch64::STRHpre: 969 case AArch64::LDRHpost: 970 case AArch64::STRHpost: 971 case AArch64::LDRBpre: 972 case AArch64::STRBpre: 973 case AArch64::LDRBpost: 974 case AArch64::STRBpost: 975 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 976 break; 977 } 978 979 switch (Inst.getOpcode()) { 980 default: 981 return Fail; 982 case AArch64::PRFUMi: 983 // Rt is an immediate in prefetch. 984 Inst.addOperand(MCOperand::CreateImm(Rt)); 985 break; 986 case AArch64::STURBBi: 987 case AArch64::LDURBBi: 988 case AArch64::LDURSBWi: 989 case AArch64::STURHHi: 990 case AArch64::LDURHHi: 991 case AArch64::LDURSHWi: 992 case AArch64::STURWi: 993 case AArch64::LDURWi: 994 case AArch64::LDTRSBWi: 995 case AArch64::LDTRSHWi: 996 case AArch64::STTRWi: 997 case AArch64::LDTRWi: 998 case AArch64::STTRHi: 999 case AArch64::LDTRHi: 1000 case AArch64::LDTRBi: 1001 case AArch64::STTRBi: 1002 case AArch64::LDRSBWpre: 1003 case AArch64::LDRSHWpre: 1004 case AArch64::STRBBpre: 1005 case AArch64::LDRBBpre: 1006 case AArch64::STRHHpre: 1007 case AArch64::LDRHHpre: 1008 case AArch64::STRWpre: 1009 case AArch64::LDRWpre: 1010 case AArch64::LDRSBWpost: 1011 case AArch64::LDRSHWpost: 1012 case AArch64::STRBBpost: 1013 case AArch64::LDRBBpost: 1014 case AArch64::STRHHpost: 1015 case AArch64::LDRHHpost: 1016 case AArch64::STRWpost: 1017 case AArch64::LDRWpost: 1018 DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); 1019 break; 1020 case AArch64::LDURSBXi: 1021 case AArch64::LDURSHXi: 1022 case AArch64::LDURSWi: 1023 case AArch64::STURXi: 1024 case AArch64::LDURXi: 1025 case AArch64::LDTRSBXi: 1026 case AArch64::LDTRSHXi: 1027 case AArch64::LDTRSWi: 1028 case AArch64::STTRXi: 1029 case AArch64::LDTRXi: 1030 case AArch64::LDRSBXpre: 1031 case AArch64::LDRSHXpre: 1032 case AArch64::STRXpre: 1033 case AArch64::LDRSWpre: 1034 case AArch64::LDRXpre: 1035 case AArch64::LDRSBXpost: 1036 case AArch64::LDRSHXpost: 1037 case AArch64::STRXpost: 1038 case AArch64::LDRSWpost: 1039 case AArch64::LDRXpost: 1040 DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); 1041 break; 1042 case AArch64::LDURQi: 1043 case AArch64::STURQi: 1044 case AArch64::LDRQpre: 1045 case AArch64::STRQpre: 1046 case AArch64::LDRQpost: 1047 case AArch64::STRQpost: 1048 DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder); 1049 break; 1050 case AArch64::LDURDi: 1051 case AArch64::STURDi: 1052 case AArch64::LDRDpre: 1053 case AArch64::STRDpre: 1054 case AArch64::LDRDpost: 1055 case AArch64::STRDpost: 1056 DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder); 1057 break; 1058 case AArch64::LDURSi: 1059 case AArch64::STURSi: 1060 case AArch64::LDRSpre: 1061 case AArch64::STRSpre: 1062 case AArch64::LDRSpost: 1063 case AArch64::STRSpost: 1064 DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder); 1065 break; 1066 case AArch64::LDURHi: 1067 case AArch64::STURHi: 1068 case AArch64::LDRHpre: 1069 case AArch64::STRHpre: 1070 case AArch64::LDRHpost: 1071 case AArch64::STRHpost: 1072 DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder); 1073 break; 1074 case AArch64::LDURBi: 1075 case AArch64::STURBi: 1076 case AArch64::LDRBpre: 1077 case AArch64::STRBpre: 1078 case AArch64::LDRBpost: 1079 case AArch64::STRBpost: 1080 DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder); 1081 break; 1082 } 1083 1084 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 1085 Inst.addOperand(MCOperand::CreateImm(offset)); 1086 1087 bool IsLoad = fieldFromInstruction(insn, 22, 1); 1088 bool IsIndexed = fieldFromInstruction(insn, 10, 2) != 0; 1089 bool IsFP = fieldFromInstruction(insn, 26, 1); 1090 1091 // Cannot write back to a transfer register (but xzr != sp). 1092 if (IsLoad && IsIndexed && !IsFP && Rn != 31 && Rt == Rn) 1093 return SoftFail; 1094 1095 return Success; 1096 } 1097 1098 static DecodeStatus DecodeExclusiveLdStInstruction(llvm::MCInst &Inst, 1099 uint32_t insn, uint64_t Addr, 1100 const void *Decoder) { 1101 unsigned Rt = fieldFromInstruction(insn, 0, 5); 1102 unsigned Rn = fieldFromInstruction(insn, 5, 5); 1103 unsigned Rt2 = fieldFromInstruction(insn, 10, 5); 1104 unsigned Rs = fieldFromInstruction(insn, 16, 5); 1105 1106 unsigned Opcode = Inst.getOpcode(); 1107 switch (Opcode) { 1108 default: 1109 return Fail; 1110 case AArch64::STLXRW: 1111 case AArch64::STLXRB: 1112 case AArch64::STLXRH: 1113 case AArch64::STXRW: 1114 case AArch64::STXRB: 1115 case AArch64::STXRH: 1116 DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder); 1117 // FALLTHROUGH 1118 case AArch64::LDARW: 1119 case AArch64::LDARB: 1120 case AArch64::LDARH: 1121 case AArch64::LDAXRW: 1122 case AArch64::LDAXRB: 1123 case AArch64::LDAXRH: 1124 case AArch64::LDXRW: 1125 case AArch64::LDXRB: 1126 case AArch64::LDXRH: 1127 case AArch64::STLRW: 1128 case AArch64::STLRB: 1129 case AArch64::STLRH: 1130 DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); 1131 break; 1132 case AArch64::STLXRX: 1133 case AArch64::STXRX: 1134 DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder); 1135 // FALLTHROUGH 1136 case AArch64::LDARX: 1137 case AArch64::LDAXRX: 1138 case AArch64::LDXRX: 1139 case AArch64::STLRX: 1140 DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); 1141 break; 1142 case AArch64::STLXPW: 1143 case AArch64::STXPW: 1144 DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder); 1145 // FALLTHROUGH 1146 case AArch64::LDAXPW: 1147 case AArch64::LDXPW: 1148 DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); 1149 DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder); 1150 break; 1151 case AArch64::STLXPX: 1152 case AArch64::STXPX: 1153 DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder); 1154 // FALLTHROUGH 1155 case AArch64::LDAXPX: 1156 case AArch64::LDXPX: 1157 DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); 1158 DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder); 1159 break; 1160 } 1161 1162 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 1163 1164 // You shouldn't load to the same register twice in an instruction... 1165 if ((Opcode == AArch64::LDAXPW || Opcode == AArch64::LDXPW || 1166 Opcode == AArch64::LDAXPX || Opcode == AArch64::LDXPX) && 1167 Rt == Rt2) 1168 return SoftFail; 1169 1170 return Success; 1171 } 1172 1173 static DecodeStatus DecodePairLdStInstruction(llvm::MCInst &Inst, uint32_t insn, 1174 uint64_t Addr, 1175 const void *Decoder) { 1176 unsigned Rt = fieldFromInstruction(insn, 0, 5); 1177 unsigned Rn = fieldFromInstruction(insn, 5, 5); 1178 unsigned Rt2 = fieldFromInstruction(insn, 10, 5); 1179 int64_t offset = fieldFromInstruction(insn, 15, 7); 1180 bool IsLoad = fieldFromInstruction(insn, 22, 1); 1181 1182 // offset is a 7-bit signed immediate, so sign extend it to 1183 // fill the unsigned. 1184 if (offset & (1 << (7 - 1))) 1185 offset |= ~((1LL << 7) - 1); 1186 1187 unsigned Opcode = Inst.getOpcode(); 1188 bool NeedsDisjointWritebackTransfer = false; 1189 1190 // First operand is always writeback of base register. 1191 switch (Opcode) { 1192 default: 1193 break; 1194 case AArch64::LDPXpost: 1195 case AArch64::STPXpost: 1196 case AArch64::LDPSWpost: 1197 case AArch64::LDPXpre: 1198 case AArch64::STPXpre: 1199 case AArch64::LDPSWpre: 1200 case AArch64::LDPWpost: 1201 case AArch64::STPWpost: 1202 case AArch64::LDPWpre: 1203 case AArch64::STPWpre: 1204 case AArch64::LDPQpost: 1205 case AArch64::STPQpost: 1206 case AArch64::LDPQpre: 1207 case AArch64::STPQpre: 1208 case AArch64::LDPDpost: 1209 case AArch64::STPDpost: 1210 case AArch64::LDPDpre: 1211 case AArch64::STPDpre: 1212 case AArch64::LDPSpost: 1213 case AArch64::STPSpost: 1214 case AArch64::LDPSpre: 1215 case AArch64::STPSpre: 1216 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 1217 break; 1218 } 1219 1220 switch (Opcode) { 1221 default: 1222 return Fail; 1223 case AArch64::LDPXpost: 1224 case AArch64::STPXpost: 1225 case AArch64::LDPSWpost: 1226 case AArch64::LDPXpre: 1227 case AArch64::STPXpre: 1228 case AArch64::LDPSWpre: 1229 NeedsDisjointWritebackTransfer = true; 1230 // Fallthrough 1231 case AArch64::LDNPXi: 1232 case AArch64::STNPXi: 1233 case AArch64::LDPXi: 1234 case AArch64::STPXi: 1235 case AArch64::LDPSWi: 1236 DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); 1237 DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder); 1238 break; 1239 case AArch64::LDPWpost: 1240 case AArch64::STPWpost: 1241 case AArch64::LDPWpre: 1242 case AArch64::STPWpre: 1243 NeedsDisjointWritebackTransfer = true; 1244 // Fallthrough 1245 case AArch64::LDNPWi: 1246 case AArch64::STNPWi: 1247 case AArch64::LDPWi: 1248 case AArch64::STPWi: 1249 DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); 1250 DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder); 1251 break; 1252 case AArch64::LDNPQi: 1253 case AArch64::STNPQi: 1254 case AArch64::LDPQpost: 1255 case AArch64::STPQpost: 1256 case AArch64::LDPQi: 1257 case AArch64::STPQi: 1258 case AArch64::LDPQpre: 1259 case AArch64::STPQpre: 1260 DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder); 1261 DecodeFPR128RegisterClass(Inst, Rt2, Addr, Decoder); 1262 break; 1263 case AArch64::LDNPDi: 1264 case AArch64::STNPDi: 1265 case AArch64::LDPDpost: 1266 case AArch64::STPDpost: 1267 case AArch64::LDPDi: 1268 case AArch64::STPDi: 1269 case AArch64::LDPDpre: 1270 case AArch64::STPDpre: 1271 DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder); 1272 DecodeFPR64RegisterClass(Inst, Rt2, Addr, Decoder); 1273 break; 1274 case AArch64::LDNPSi: 1275 case AArch64::STNPSi: 1276 case AArch64::LDPSpost: 1277 case AArch64::STPSpost: 1278 case AArch64::LDPSi: 1279 case AArch64::STPSi: 1280 case AArch64::LDPSpre: 1281 case AArch64::STPSpre: 1282 DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder); 1283 DecodeFPR32RegisterClass(Inst, Rt2, Addr, Decoder); 1284 break; 1285 } 1286 1287 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 1288 Inst.addOperand(MCOperand::CreateImm(offset)); 1289 1290 // You shouldn't load to the same register twice in an instruction... 1291 if (IsLoad && Rt == Rt2) 1292 return SoftFail; 1293 1294 // ... or do any operation that writes-back to a transfer register. But note 1295 // that "stp xzr, xzr, [sp], #4" is fine because xzr and sp are different. 1296 if (NeedsDisjointWritebackTransfer && Rn != 31 && (Rt == Rn || Rt2 == Rn)) 1297 return SoftFail; 1298 1299 return Success; 1300 } 1301 1302 static DecodeStatus DecodeAddSubERegInstruction(llvm::MCInst &Inst, 1303 uint32_t insn, uint64_t Addr, 1304 const void *Decoder) { 1305 unsigned Rd = fieldFromInstruction(insn, 0, 5); 1306 unsigned Rn = fieldFromInstruction(insn, 5, 5); 1307 unsigned Rm = fieldFromInstruction(insn, 16, 5); 1308 unsigned extend = fieldFromInstruction(insn, 10, 6); 1309 1310 unsigned shift = extend & 0x7; 1311 if (shift > 4) 1312 return Fail; 1313 1314 switch (Inst.getOpcode()) { 1315 default: 1316 return Fail; 1317 case AArch64::ADDWrx: 1318 case AArch64::SUBWrx: 1319 DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder); 1320 DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder); 1321 DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); 1322 break; 1323 case AArch64::ADDSWrx: 1324 case AArch64::SUBSWrx: 1325 DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); 1326 DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder); 1327 DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); 1328 break; 1329 case AArch64::ADDXrx: 1330 case AArch64::SUBXrx: 1331 DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder); 1332 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 1333 DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); 1334 break; 1335 case AArch64::ADDSXrx: 1336 case AArch64::SUBSXrx: 1337 DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); 1338 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 1339 DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); 1340 break; 1341 case AArch64::ADDXrx64: 1342 case AArch64::SUBXrx64: 1343 DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder); 1344 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 1345 DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder); 1346 break; 1347 case AArch64::SUBSXrx64: 1348 case AArch64::ADDSXrx64: 1349 DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); 1350 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 1351 DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder); 1352 break; 1353 } 1354 1355 Inst.addOperand(MCOperand::CreateImm(extend)); 1356 return Success; 1357 } 1358 1359 static DecodeStatus DecodeLogicalImmInstruction(llvm::MCInst &Inst, 1360 uint32_t insn, uint64_t Addr, 1361 const void *Decoder) { 1362 unsigned Rd = fieldFromInstruction(insn, 0, 5); 1363 unsigned Rn = fieldFromInstruction(insn, 5, 5); 1364 unsigned Datasize = fieldFromInstruction(insn, 31, 1); 1365 unsigned imm; 1366 1367 if (Datasize) { 1368 if (Inst.getOpcode() == AArch64::ANDSXri) 1369 DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); 1370 else 1371 DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder); 1372 DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder); 1373 imm = fieldFromInstruction(insn, 10, 13); 1374 if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64)) 1375 return Fail; 1376 } else { 1377 if (Inst.getOpcode() == AArch64::ANDSWri) 1378 DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); 1379 else 1380 DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder); 1381 DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder); 1382 imm = fieldFromInstruction(insn, 10, 12); 1383 if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 32)) 1384 return Fail; 1385 } 1386 Inst.addOperand(MCOperand::CreateImm(imm)); 1387 return Success; 1388 } 1389 1390 static DecodeStatus DecodeModImmInstruction(llvm::MCInst &Inst, uint32_t insn, 1391 uint64_t Addr, 1392 const void *Decoder) { 1393 unsigned Rd = fieldFromInstruction(insn, 0, 5); 1394 unsigned cmode = fieldFromInstruction(insn, 12, 4); 1395 unsigned imm = fieldFromInstruction(insn, 16, 3) << 5; 1396 imm |= fieldFromInstruction(insn, 5, 5); 1397 1398 if (Inst.getOpcode() == AArch64::MOVID) 1399 DecodeFPR64RegisterClass(Inst, Rd, Addr, Decoder); 1400 else 1401 DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder); 1402 1403 Inst.addOperand(MCOperand::CreateImm(imm)); 1404 1405 switch (Inst.getOpcode()) { 1406 default: 1407 break; 1408 case AArch64::MOVIv4i16: 1409 case AArch64::MOVIv8i16: 1410 case AArch64::MVNIv4i16: 1411 case AArch64::MVNIv8i16: 1412 case AArch64::MOVIv2i32: 1413 case AArch64::MOVIv4i32: 1414 case AArch64::MVNIv2i32: 1415 case AArch64::MVNIv4i32: 1416 Inst.addOperand(MCOperand::CreateImm((cmode & 6) << 2)); 1417 break; 1418 case AArch64::MOVIv2s_msl: 1419 case AArch64::MOVIv4s_msl: 1420 case AArch64::MVNIv2s_msl: 1421 case AArch64::MVNIv4s_msl: 1422 Inst.addOperand(MCOperand::CreateImm(cmode & 1 ? 0x110 : 0x108)); 1423 break; 1424 } 1425 1426 return Success; 1427 } 1428 1429 static DecodeStatus DecodeModImmTiedInstruction(llvm::MCInst &Inst, 1430 uint32_t insn, uint64_t Addr, 1431 const void *Decoder) { 1432 unsigned Rd = fieldFromInstruction(insn, 0, 5); 1433 unsigned cmode = fieldFromInstruction(insn, 12, 4); 1434 unsigned imm = fieldFromInstruction(insn, 16, 3) << 5; 1435 imm |= fieldFromInstruction(insn, 5, 5); 1436 1437 // Tied operands added twice. 1438 DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder); 1439 DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder); 1440 1441 Inst.addOperand(MCOperand::CreateImm(imm)); 1442 Inst.addOperand(MCOperand::CreateImm((cmode & 6) << 2)); 1443 1444 return Success; 1445 } 1446 1447 static DecodeStatus DecodeAdrInstruction(llvm::MCInst &Inst, uint32_t insn, 1448 uint64_t Addr, const void *Decoder) { 1449 unsigned Rd = fieldFromInstruction(insn, 0, 5); 1450 int64_t imm = fieldFromInstruction(insn, 5, 19) << 2; 1451 imm |= fieldFromInstruction(insn, 29, 2); 1452 const AArch64Disassembler *Dis = 1453 static_cast<const AArch64Disassembler *>(Decoder); 1454 1455 // Sign-extend the 21-bit immediate. 1456 if (imm & (1 << (21 - 1))) 1457 imm |= ~((1LL << 21) - 1); 1458 1459 DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); 1460 if (!Dis->tryAddingSymbolicOperand(Inst, imm, Addr, Fail, 0, 4)) 1461 Inst.addOperand(MCOperand::CreateImm(imm)); 1462 1463 return Success; 1464 } 1465 1466 static DecodeStatus DecodeBaseAddSubImm(llvm::MCInst &Inst, uint32_t insn, 1467 uint64_t Addr, const void *Decoder) { 1468 unsigned Rd = fieldFromInstruction(insn, 0, 5); 1469 unsigned Rn = fieldFromInstruction(insn, 5, 5); 1470 unsigned Imm = fieldFromInstruction(insn, 10, 14); 1471 unsigned S = fieldFromInstruction(insn, 29, 1); 1472 unsigned Datasize = fieldFromInstruction(insn, 31, 1); 1473 1474 unsigned ShifterVal = (Imm >> 12) & 3; 1475 unsigned ImmVal = Imm & 0xFFF; 1476 const AArch64Disassembler *Dis = 1477 static_cast<const AArch64Disassembler *>(Decoder); 1478 1479 if (ShifterVal != 0 && ShifterVal != 1) 1480 return Fail; 1481 1482 if (Datasize) { 1483 if (Rd == 31 && !S) 1484 DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder); 1485 else 1486 DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); 1487 DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); 1488 } else { 1489 if (Rd == 31 && !S) 1490 DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder); 1491 else 1492 DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); 1493 DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder); 1494 } 1495 1496 if (!Dis->tryAddingSymbolicOperand(Inst, Imm, Addr, Fail, 0, 4)) 1497 Inst.addOperand(MCOperand::CreateImm(ImmVal)); 1498 Inst.addOperand(MCOperand::CreateImm(12 * ShifterVal)); 1499 return Success; 1500 } 1501 1502 static DecodeStatus DecodeUnconditionalBranch(llvm::MCInst &Inst, uint32_t insn, 1503 uint64_t Addr, 1504 const void *Decoder) { 1505 int64_t imm = fieldFromInstruction(insn, 0, 26); 1506 const AArch64Disassembler *Dis = 1507 static_cast<const AArch64Disassembler *>(Decoder); 1508 1509 // Sign-extend the 26-bit immediate. 1510 if (imm & (1 << (26 - 1))) 1511 imm |= ~((1LL << 26) - 1); 1512 1513 if (!Dis->tryAddingSymbolicOperand(Inst, imm << 2, Addr, true, 0, 4)) 1514 Inst.addOperand(MCOperand::CreateImm(imm)); 1515 1516 return Success; 1517 } 1518 1519 static DecodeStatus DecodeSystemPStateInstruction(llvm::MCInst &Inst, 1520 uint32_t insn, uint64_t Addr, 1521 const void *Decoder) { 1522 uint64_t op1 = fieldFromInstruction(insn, 16, 3); 1523 uint64_t op2 = fieldFromInstruction(insn, 5, 3); 1524 uint64_t crm = fieldFromInstruction(insn, 8, 4); 1525 1526 uint64_t pstate_field = (op1 << 3) | op2; 1527 1528 Inst.addOperand(MCOperand::CreateImm(pstate_field)); 1529 Inst.addOperand(MCOperand::CreateImm(crm)); 1530 1531 bool ValidNamed; 1532 (void)AArch64PState::PStateMapper().toString(pstate_field, ValidNamed); 1533 1534 return ValidNamed ? Success : Fail; 1535 } 1536 1537 static DecodeStatus DecodeTestAndBranch(llvm::MCInst &Inst, uint32_t insn, 1538 uint64_t Addr, const void *Decoder) { 1539 uint64_t Rt = fieldFromInstruction(insn, 0, 5); 1540 uint64_t bit = fieldFromInstruction(insn, 31, 1) << 5; 1541 bit |= fieldFromInstruction(insn, 19, 5); 1542 int64_t dst = fieldFromInstruction(insn, 5, 14); 1543 const AArch64Disassembler *Dis = 1544 static_cast<const AArch64Disassembler *>(Decoder); 1545 1546 // Sign-extend 14-bit immediate. 1547 if (dst & (1 << (14 - 1))) 1548 dst |= ~((1LL << 14) - 1); 1549 1550 if (fieldFromInstruction(insn, 31, 1) == 0) 1551 DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); 1552 else 1553 DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); 1554 Inst.addOperand(MCOperand::CreateImm(bit)); 1555 if (!Dis->tryAddingSymbolicOperand(Inst, dst << 2, Addr, true, 0, 4)) 1556 Inst.addOperand(MCOperand::CreateImm(dst)); 1557 1558 return Success; 1559 } 1560
