1 //===- HexagonDisassembler.cpp - Disassembler for Hexagon ISA -------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #define DEBUG_TYPE "hexagon-disassembler" 10 11 #include "MCTargetDesc/HexagonBaseInfo.h" 12 #include "MCTargetDesc/HexagonMCChecker.h" 13 #include "MCTargetDesc/HexagonMCInstrInfo.h" 14 #include "MCTargetDesc/HexagonMCTargetDesc.h" 15 #include "TargetInfo/HexagonTargetInfo.h" 16 #include "llvm/ADT/ArrayRef.h" 17 #include "llvm/ADT/STLExtras.h" 18 #include "llvm/MC/MCContext.h" 19 #include "llvm/MC/MCDisassembler/MCDisassembler.h" 20 #include "llvm/MC/MCExpr.h" 21 #include "llvm/MC/MCFixedLenDisassembler.h" 22 #include "llvm/MC/MCInst.h" 23 #include "llvm/MC/MCInstrInfo.h" 24 #include "llvm/MC/MCRegisterInfo.h" 25 #include "llvm/MC/MCSubtargetInfo.h" 26 #include "llvm/Support/Endian.h" 27 #include "llvm/Support/MathExtras.h" 28 #include "llvm/Support/TargetRegistry.h" 29 #include "llvm/Support/raw_ostream.h" 30 #include <cassert> 31 #include <cstddef> 32 #include <cstdint> 33 #include <memory> 34 35 using namespace llvm; 36 using namespace Hexagon; 37 38 using DecodeStatus = MCDisassembler::DecodeStatus; 39 40 namespace { 41 42 /// Hexagon disassembler for all Hexagon platforms. 43 class HexagonDisassembler : public MCDisassembler { 44 public: 45 std::unique_ptr<MCInstrInfo const> const MCII; 46 std::unique_ptr<MCInst *> CurrentBundle; 47 mutable MCInst const *CurrentExtender; 48 49 HexagonDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, 50 MCInstrInfo const *MCII) 51 : MCDisassembler(STI, Ctx), MCII(MCII), CurrentBundle(new MCInst *), 52 CurrentExtender(nullptr) {} 53 54 DecodeStatus getSingleInstruction(MCInst &Instr, MCInst &MCB, 55 ArrayRef<uint8_t> Bytes, uint64_t Address, 56 raw_ostream &CStream, bool &Complete) const; 57 DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, 58 ArrayRef<uint8_t> Bytes, uint64_t Address, 59 raw_ostream &CStream) const override; 60 void remapInstruction(MCInst &Instr) const; 61 }; 62 63 static uint64_t fullValue(HexagonDisassembler const &Disassembler, MCInst &MI, 64 int64_t Value) { 65 MCInstrInfo MCII = *Disassembler.MCII; 66 if (!Disassembler.CurrentExtender || 67 MI.size() != HexagonMCInstrInfo::getExtendableOp(MCII, MI)) 68 return Value; 69 unsigned Alignment = HexagonMCInstrInfo::getExtentAlignment(MCII, MI); 70 uint32_t Lower6 = static_cast<uint32_t>(Value >> Alignment) & 0x3f; 71 int64_t Bits; 72 bool Success = 73 Disassembler.CurrentExtender->getOperand(0).getExpr()->evaluateAsAbsolute( 74 Bits); 75 assert(Success); 76 (void)Success; 77 uint64_t Upper26 = static_cast<uint64_t>(Bits); 78 uint64_t Operand = Upper26 | Lower6; 79 return Operand; 80 } 81 static HexagonDisassembler const &disassembler(void const *Decoder) { 82 return *static_cast<HexagonDisassembler const *>(Decoder); 83 } 84 template <size_t T> 85 static void signedDecoder(MCInst &MI, unsigned tmp, const void *Decoder) { 86 HexagonDisassembler const &Disassembler = disassembler(Decoder); 87 int64_t FullValue = fullValue(Disassembler, MI, SignExtend64<T>(tmp)); 88 int64_t Extended = SignExtend64<32>(FullValue); 89 HexagonMCInstrInfo::addConstant(MI, Extended, Disassembler.getContext()); 90 } 91 } 92 93 // Forward declare these because the auto-generated code will reference them. 94 // Definitions are further down. 95 96 static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo, 97 uint64_t Address, 98 const void *Decoder); 99 static DecodeStatus DecodeGeneralSubRegsRegisterClass(MCInst &Inst, 100 unsigned RegNo, 101 uint64_t Address, 102 const void *Decoder); 103 static DecodeStatus DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo, 104 uint64_t Address, 105 const void *Decoder); 106 static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo, 107 uint64_t Address, 108 const void *Decoder); 109 static DecodeStatus DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo, 110 uint64_t Address, 111 const void *Decoder); 112 static DecodeStatus 113 DecodeGeneralDoubleLow8RegsRegisterClass(MCInst &Inst, unsigned RegNo, 114 uint64_t Address, const void *Decoder); 115 static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo, 116 uint64_t Address, 117 const void *Decoder); 118 static DecodeStatus DecodeHvxVQRRegisterClass(MCInst &Inst, 119 unsigned RegNo, 120 uint64_t Address, 121 const void *Decoder); 122 static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo, 123 uint64_t Address, 124 const void *Decoder); 125 static DecodeStatus DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo, 126 uint64_t Address, 127 const void *Decoder); 128 static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo, 129 uint64_t Address, 130 const void *Decoder); 131 static DecodeStatus DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo, 132 uint64_t Address, 133 const void *Decoder); 134 static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo, 135 uint64_t Address, 136 const void *Decoder); 137 static DecodeStatus DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo, 138 uint64_t Address, 139 const void *Decoder); 140 static DecodeStatus DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo, 141 uint64_t Address, 142 const void *Decoder); 143 144 static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp, 145 uint64_t Address, const void *Decoder); 146 static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp, 147 uint64_t /*Address*/, const void *Decoder); 148 static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address, 149 const void *Decoder); 150 #include "HexagonDepDecoders.inc" 151 #include "HexagonGenDisassemblerTables.inc" 152 153 static MCDisassembler *createHexagonDisassembler(const Target &T, 154 const MCSubtargetInfo &STI, 155 MCContext &Ctx) { 156 return new HexagonDisassembler(STI, Ctx, T.createMCInstrInfo()); 157 } 158 159 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeHexagonDisassembler() { 160 TargetRegistry::RegisterMCDisassembler(getTheHexagonTarget(), 161 createHexagonDisassembler); 162 } 163 164 DecodeStatus HexagonDisassembler::getInstruction(MCInst &MI, uint64_t &Size, 165 ArrayRef<uint8_t> Bytes, 166 uint64_t Address, 167 raw_ostream &cs) const { 168 DecodeStatus Result = DecodeStatus::Success; 169 bool Complete = false; 170 Size = 0; 171 172 *CurrentBundle = &MI; 173 MI.setOpcode(Hexagon::BUNDLE); 174 MI.addOperand(MCOperand::createImm(0)); 175 while (Result == Success && !Complete) { 176 if (Bytes.size() < HEXAGON_INSTR_SIZE) 177 return MCDisassembler::Fail; 178 MCInst *Inst = new (getContext()) MCInst; 179 Result = getSingleInstruction(*Inst, MI, Bytes, Address, cs, Complete); 180 MI.addOperand(MCOperand::createInst(Inst)); 181 Size += HEXAGON_INSTR_SIZE; 182 Bytes = Bytes.slice(HEXAGON_INSTR_SIZE); 183 } 184 if (Result == MCDisassembler::Fail) 185 return Result; 186 if (Size > HEXAGON_MAX_PACKET_SIZE) 187 return MCDisassembler::Fail; 188 HexagonMCChecker Checker(getContext(), *MCII, STI, MI, 189 *getContext().getRegisterInfo(), false); 190 if (!Checker.check()) 191 return MCDisassembler::Fail; 192 remapInstruction(MI); 193 return MCDisassembler::Success; 194 } 195 196 void HexagonDisassembler::remapInstruction(MCInst &Instr) const { 197 for (auto I: HexagonMCInstrInfo::bundleInstructions(Instr)) { 198 auto &MI = const_cast<MCInst &>(*I.getInst()); 199 switch (MI.getOpcode()) { 200 case Hexagon::S2_allocframe: 201 if (MI.getOperand(0).getReg() == Hexagon::R29) { 202 MI.setOpcode(Hexagon::S6_allocframe_to_raw); 203 MI.erase(MI.begin () + 1); 204 MI.erase(MI.begin ()); 205 } 206 break; 207 case Hexagon::L2_deallocframe: 208 if (MI.getOperand(0).getReg() == Hexagon::D15 && 209 MI.getOperand(1).getReg() == Hexagon::R30) { 210 MI.setOpcode(L6_deallocframe_map_to_raw); 211 MI.erase(MI.begin () + 1); 212 MI.erase(MI.begin ()); 213 } 214 break; 215 case Hexagon::L4_return: 216 if (MI.getOperand(0).getReg() == Hexagon::D15 && 217 MI.getOperand(1).getReg() == Hexagon::R30) { 218 MI.setOpcode(L6_return_map_to_raw); 219 MI.erase(MI.begin () + 1); 220 MI.erase(MI.begin ()); 221 } 222 break; 223 case Hexagon::L4_return_t: 224 if (MI.getOperand(0).getReg() == Hexagon::D15 && 225 MI.getOperand(2).getReg() == Hexagon::R30) { 226 MI.setOpcode(L4_return_map_to_raw_t); 227 MI.erase(MI.begin () + 2); 228 MI.erase(MI.begin ()); 229 } 230 break; 231 case Hexagon::L4_return_f: 232 if (MI.getOperand(0).getReg() == Hexagon::D15 && 233 MI.getOperand(2).getReg() == Hexagon::R30) { 234 MI.setOpcode(L4_return_map_to_raw_f); 235 MI.erase(MI.begin () + 2); 236 MI.erase(MI.begin ()); 237 } 238 break; 239 case Hexagon::L4_return_tnew_pt: 240 if (MI.getOperand(0).getReg() == Hexagon::D15 && 241 MI.getOperand(2).getReg() == Hexagon::R30) { 242 MI.setOpcode(L4_return_map_to_raw_tnew_pt); 243 MI.erase(MI.begin () + 2); 244 MI.erase(MI.begin ()); 245 } 246 break; 247 case Hexagon::L4_return_fnew_pt: 248 if (MI.getOperand(0).getReg() == Hexagon::D15 && 249 MI.getOperand(2).getReg() == Hexagon::R30) { 250 MI.setOpcode(L4_return_map_to_raw_fnew_pt); 251 MI.erase(MI.begin () + 2); 252 MI.erase(MI.begin ()); 253 } 254 break; 255 case Hexagon::L4_return_tnew_pnt: 256 if (MI.getOperand(0).getReg() == Hexagon::D15 && 257 MI.getOperand(2).getReg() == Hexagon::R30) { 258 MI.setOpcode(L4_return_map_to_raw_tnew_pnt); 259 MI.erase(MI.begin () + 2); 260 MI.erase(MI.begin ()); 261 } 262 break; 263 case Hexagon::L4_return_fnew_pnt: 264 if (MI.getOperand(0).getReg() == Hexagon::D15 && 265 MI.getOperand(2).getReg() == Hexagon::R30) { 266 MI.setOpcode(L4_return_map_to_raw_fnew_pnt); 267 MI.erase(MI.begin () + 2); 268 MI.erase(MI.begin ()); 269 } 270 break; 271 } 272 } 273 } 274 275 static void adjustDuplex(MCInst &MI, MCContext &Context) { 276 switch (MI.getOpcode()) { 277 case Hexagon::SA1_setin1: 278 MI.insert(MI.begin() + 1, 279 MCOperand::createExpr(MCConstantExpr::create(-1, Context))); 280 break; 281 case Hexagon::SA1_dec: 282 MI.insert(MI.begin() + 2, 283 MCOperand::createExpr(MCConstantExpr::create(-1, Context))); 284 break; 285 default: 286 break; 287 } 288 } 289 290 DecodeStatus HexagonDisassembler::getSingleInstruction(MCInst &MI, MCInst &MCB, 291 ArrayRef<uint8_t> Bytes, 292 uint64_t Address, 293 raw_ostream &cs, 294 bool &Complete) const { 295 assert(Bytes.size() >= HEXAGON_INSTR_SIZE); 296 297 uint32_t Instruction = support::endian::read32le(Bytes.data()); 298 299 auto BundleSize = HexagonMCInstrInfo::bundleSize(MCB); 300 if ((Instruction & HexagonII::INST_PARSE_MASK) == 301 HexagonII::INST_PARSE_LOOP_END) { 302 if (BundleSize == 0) 303 HexagonMCInstrInfo::setInnerLoop(MCB); 304 else if (BundleSize == 1) 305 HexagonMCInstrInfo::setOuterLoop(MCB); 306 else 307 return DecodeStatus::Fail; 308 } 309 310 CurrentExtender = HexagonMCInstrInfo::extenderForIndex( 311 MCB, HexagonMCInstrInfo::bundleSize(MCB)); 312 313 DecodeStatus Result = DecodeStatus::Fail; 314 if ((Instruction & HexagonII::INST_PARSE_MASK) == 315 HexagonII::INST_PARSE_DUPLEX) { 316 unsigned duplexIClass; 317 uint8_t const *DecodeLow, *DecodeHigh; 318 duplexIClass = ((Instruction >> 28) & 0xe) | ((Instruction >> 13) & 0x1); 319 switch (duplexIClass) { 320 default: 321 return MCDisassembler::Fail; 322 case 0: 323 DecodeLow = DecoderTableSUBINSN_L132; 324 DecodeHigh = DecoderTableSUBINSN_L132; 325 break; 326 case 1: 327 DecodeLow = DecoderTableSUBINSN_L232; 328 DecodeHigh = DecoderTableSUBINSN_L132; 329 break; 330 case 2: 331 DecodeLow = DecoderTableSUBINSN_L232; 332 DecodeHigh = DecoderTableSUBINSN_L232; 333 break; 334 case 3: 335 DecodeLow = DecoderTableSUBINSN_A32; 336 DecodeHigh = DecoderTableSUBINSN_A32; 337 break; 338 case 4: 339 DecodeLow = DecoderTableSUBINSN_L132; 340 DecodeHigh = DecoderTableSUBINSN_A32; 341 break; 342 case 5: 343 DecodeLow = DecoderTableSUBINSN_L232; 344 DecodeHigh = DecoderTableSUBINSN_A32; 345 break; 346 case 6: 347 DecodeLow = DecoderTableSUBINSN_S132; 348 DecodeHigh = DecoderTableSUBINSN_A32; 349 break; 350 case 7: 351 DecodeLow = DecoderTableSUBINSN_S232; 352 DecodeHigh = DecoderTableSUBINSN_A32; 353 break; 354 case 8: 355 DecodeLow = DecoderTableSUBINSN_S132; 356 DecodeHigh = DecoderTableSUBINSN_L132; 357 break; 358 case 9: 359 DecodeLow = DecoderTableSUBINSN_S132; 360 DecodeHigh = DecoderTableSUBINSN_L232; 361 break; 362 case 10: 363 DecodeLow = DecoderTableSUBINSN_S132; 364 DecodeHigh = DecoderTableSUBINSN_S132; 365 break; 366 case 11: 367 DecodeLow = DecoderTableSUBINSN_S232; 368 DecodeHigh = DecoderTableSUBINSN_S132; 369 break; 370 case 12: 371 DecodeLow = DecoderTableSUBINSN_S232; 372 DecodeHigh = DecoderTableSUBINSN_L132; 373 break; 374 case 13: 375 DecodeLow = DecoderTableSUBINSN_S232; 376 DecodeHigh = DecoderTableSUBINSN_L232; 377 break; 378 case 14: 379 DecodeLow = DecoderTableSUBINSN_S232; 380 DecodeHigh = DecoderTableSUBINSN_S232; 381 break; 382 } 383 MI.setOpcode(Hexagon::DuplexIClass0 + duplexIClass); 384 MCInst *MILow = new (getContext()) MCInst; 385 MCInst *MIHigh = new (getContext()) MCInst; 386 auto TmpExtender = CurrentExtender; 387 CurrentExtender = 388 nullptr; // constant extenders in duplex must always be in slot 1 389 Result = decodeInstruction(DecodeLow, *MILow, Instruction & 0x1fff, Address, 390 this, STI); 391 CurrentExtender = TmpExtender; 392 if (Result != DecodeStatus::Success) 393 return DecodeStatus::Fail; 394 adjustDuplex(*MILow, getContext()); 395 Result = decodeInstruction( 396 DecodeHigh, *MIHigh, (Instruction >> 16) & 0x1fff, Address, this, STI); 397 if (Result != DecodeStatus::Success) 398 return DecodeStatus::Fail; 399 adjustDuplex(*MIHigh, getContext()); 400 MCOperand OPLow = MCOperand::createInst(MILow); 401 MCOperand OPHigh = MCOperand::createInst(MIHigh); 402 MI.addOperand(OPLow); 403 MI.addOperand(OPHigh); 404 Complete = true; 405 } else { 406 if ((Instruction & HexagonII::INST_PARSE_MASK) == 407 HexagonII::INST_PARSE_PACKET_END) 408 Complete = true; 409 410 if (CurrentExtender != nullptr) 411 Result = decodeInstruction(DecoderTableMustExtend32, MI, Instruction, 412 Address, this, STI); 413 414 if (Result != MCDisassembler::Success) 415 Result = decodeInstruction(DecoderTable32, MI, Instruction, Address, this, 416 STI); 417 418 if (Result != MCDisassembler::Success && 419 STI.getFeatureBits()[Hexagon::ExtensionHVX]) 420 Result = decodeInstruction(DecoderTableEXT_mmvec32, MI, Instruction, 421 Address, this, STI); 422 423 } 424 425 switch (MI.getOpcode()) { 426 case Hexagon::J4_cmpeqn1_f_jumpnv_nt: 427 case Hexagon::J4_cmpeqn1_f_jumpnv_t: 428 case Hexagon::J4_cmpeqn1_fp0_jump_nt: 429 case Hexagon::J4_cmpeqn1_fp0_jump_t: 430 case Hexagon::J4_cmpeqn1_fp1_jump_nt: 431 case Hexagon::J4_cmpeqn1_fp1_jump_t: 432 case Hexagon::J4_cmpeqn1_t_jumpnv_nt: 433 case Hexagon::J4_cmpeqn1_t_jumpnv_t: 434 case Hexagon::J4_cmpeqn1_tp0_jump_nt: 435 case Hexagon::J4_cmpeqn1_tp0_jump_t: 436 case Hexagon::J4_cmpeqn1_tp1_jump_nt: 437 case Hexagon::J4_cmpeqn1_tp1_jump_t: 438 case Hexagon::J4_cmpgtn1_f_jumpnv_nt: 439 case Hexagon::J4_cmpgtn1_f_jumpnv_t: 440 case Hexagon::J4_cmpgtn1_fp0_jump_nt: 441 case Hexagon::J4_cmpgtn1_fp0_jump_t: 442 case Hexagon::J4_cmpgtn1_fp1_jump_nt: 443 case Hexagon::J4_cmpgtn1_fp1_jump_t: 444 case Hexagon::J4_cmpgtn1_t_jumpnv_nt: 445 case Hexagon::J4_cmpgtn1_t_jumpnv_t: 446 case Hexagon::J4_cmpgtn1_tp0_jump_nt: 447 case Hexagon::J4_cmpgtn1_tp0_jump_t: 448 case Hexagon::J4_cmpgtn1_tp1_jump_nt: 449 case Hexagon::J4_cmpgtn1_tp1_jump_t: 450 MI.insert(MI.begin() + 1, 451 MCOperand::createExpr(MCConstantExpr::create(-1, getContext()))); 452 break; 453 default: 454 break; 455 } 456 457 if (HexagonMCInstrInfo::isNewValue(*MCII, MI)) { 458 unsigned OpIndex = HexagonMCInstrInfo::getNewValueOp(*MCII, MI); 459 MCOperand &MCO = MI.getOperand(OpIndex); 460 assert(MCO.isReg() && "New value consumers must be registers"); 461 unsigned Register = 462 getContext().getRegisterInfo()->getEncodingValue(MCO.getReg()); 463 if ((Register & 0x6) == 0) 464 // HexagonPRM 10.11 Bit 1-2 == 0 is reserved 465 return MCDisassembler::Fail; 466 unsigned Lookback = (Register & 0x6) >> 1; 467 unsigned Offset = 1; 468 bool Vector = HexagonMCInstrInfo::isVector(*MCII, MI); 469 bool PrevVector = false; 470 auto Instructions = HexagonMCInstrInfo::bundleInstructions(**CurrentBundle); 471 auto i = Instructions.end() - 1; 472 for (auto n = Instructions.begin() - 1;; --i, ++Offset) { 473 if (i == n) 474 // Couldn't find producer 475 return MCDisassembler::Fail; 476 bool CurrentVector = HexagonMCInstrInfo::isVector(*MCII, *i->getInst()); 477 if (Vector && !CurrentVector) 478 // Skip scalars when calculating distances for vectors 479 ++Lookback; 480 if (HexagonMCInstrInfo::isImmext(*i->getInst()) && (Vector == PrevVector)) 481 ++Lookback; 482 PrevVector = CurrentVector; 483 if (Offset == Lookback) 484 break; 485 } 486 auto const &Inst = *i->getInst(); 487 bool SubregBit = (Register & 0x1) != 0; 488 if (HexagonMCInstrInfo::hasNewValue2(*MCII, Inst)) { 489 // If subreg bit is set we're selecting the second produced newvalue 490 unsigned Producer = SubregBit ? 491 HexagonMCInstrInfo::getNewValueOperand(*MCII, Inst).getReg() : 492 HexagonMCInstrInfo::getNewValueOperand2(*MCII, Inst).getReg(); 493 assert(Producer != Hexagon::NoRegister); 494 MCO.setReg(Producer); 495 } else if (HexagonMCInstrInfo::hasNewValue(*MCII, Inst)) { 496 unsigned Producer = 497 HexagonMCInstrInfo::getNewValueOperand(*MCII, Inst).getReg(); 498 if (Producer >= Hexagon::W0 && Producer <= Hexagon::W15) 499 Producer = ((Producer - Hexagon::W0) << 1) + SubregBit + Hexagon::V0; 500 else if (SubregBit) 501 // Hexagon PRM 10.11 New-value operands 502 // Nt[0] is reserved and should always be encoded as zero. 503 return MCDisassembler::Fail; 504 assert(Producer != Hexagon::NoRegister); 505 MCO.setReg(Producer); 506 } else 507 return MCDisassembler::Fail; 508 } 509 510 if (CurrentExtender != nullptr) { 511 MCInst const &Inst = HexagonMCInstrInfo::isDuplex(*MCII, MI) 512 ? *MI.getOperand(1).getInst() 513 : MI; 514 if (!HexagonMCInstrInfo::isExtendable(*MCII, Inst) && 515 !HexagonMCInstrInfo::isExtended(*MCII, Inst)) 516 return MCDisassembler::Fail; 517 } 518 return Result; 519 } 520 521 static DecodeStatus DecodeRegisterClass(MCInst &Inst, unsigned RegNo, 522 ArrayRef<MCPhysReg> Table) { 523 if (RegNo < Table.size()) { 524 Inst.addOperand(MCOperand::createReg(Table[RegNo])); 525 return MCDisassembler::Success; 526 } 527 528 return MCDisassembler::Fail; 529 } 530 531 static DecodeStatus DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo, 532 uint64_t Address, 533 const void *Decoder) { 534 return DecodeIntRegsRegisterClass(Inst, RegNo, Address, Decoder); 535 } 536 537 static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo, 538 uint64_t Address, 539 const void *Decoder) { 540 static const MCPhysReg IntRegDecoderTable[] = { 541 Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3, Hexagon::R4, 542 Hexagon::R5, Hexagon::R6, Hexagon::R7, Hexagon::R8, Hexagon::R9, 543 Hexagon::R10, Hexagon::R11, Hexagon::R12, Hexagon::R13, Hexagon::R14, 544 Hexagon::R15, Hexagon::R16, Hexagon::R17, Hexagon::R18, Hexagon::R19, 545 Hexagon::R20, Hexagon::R21, Hexagon::R22, Hexagon::R23, Hexagon::R24, 546 Hexagon::R25, Hexagon::R26, Hexagon::R27, Hexagon::R28, Hexagon::R29, 547 Hexagon::R30, Hexagon::R31}; 548 549 return DecodeRegisterClass(Inst, RegNo, IntRegDecoderTable); 550 } 551 552 static DecodeStatus DecodeGeneralSubRegsRegisterClass(MCInst &Inst, 553 unsigned RegNo, 554 uint64_t Address, 555 const void *Decoder) { 556 static const MCPhysReg GeneralSubRegDecoderTable[] = { 557 Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3, 558 Hexagon::R4, Hexagon::R5, Hexagon::R6, Hexagon::R7, 559 Hexagon::R16, Hexagon::R17, Hexagon::R18, Hexagon::R19, 560 Hexagon::R20, Hexagon::R21, Hexagon::R22, Hexagon::R23, 561 }; 562 563 return DecodeRegisterClass(Inst, RegNo, GeneralSubRegDecoderTable); 564 } 565 566 static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo, 567 uint64_t /*Address*/, 568 const void *Decoder) { 569 static const MCPhysReg HvxVRDecoderTable[] = { 570 Hexagon::V0, Hexagon::V1, Hexagon::V2, Hexagon::V3, Hexagon::V4, 571 Hexagon::V5, Hexagon::V6, Hexagon::V7, Hexagon::V8, Hexagon::V9, 572 Hexagon::V10, Hexagon::V11, Hexagon::V12, Hexagon::V13, Hexagon::V14, 573 Hexagon::V15, Hexagon::V16, Hexagon::V17, Hexagon::V18, Hexagon::V19, 574 Hexagon::V20, Hexagon::V21, Hexagon::V22, Hexagon::V23, Hexagon::V24, 575 Hexagon::V25, Hexagon::V26, Hexagon::V27, Hexagon::V28, Hexagon::V29, 576 Hexagon::V30, Hexagon::V31}; 577 578 return DecodeRegisterClass(Inst, RegNo, HvxVRDecoderTable); 579 } 580 581 static DecodeStatus DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo, 582 uint64_t /*Address*/, 583 const void *Decoder) { 584 static const MCPhysReg DoubleRegDecoderTable[] = { 585 Hexagon::D0, Hexagon::D1, Hexagon::D2, Hexagon::D3, 586 Hexagon::D4, Hexagon::D5, Hexagon::D6, Hexagon::D7, 587 Hexagon::D8, Hexagon::D9, Hexagon::D10, Hexagon::D11, 588 Hexagon::D12, Hexagon::D13, Hexagon::D14, Hexagon::D15}; 589 590 return DecodeRegisterClass(Inst, RegNo >> 1, DoubleRegDecoderTable); 591 } 592 593 static DecodeStatus DecodeGeneralDoubleLow8RegsRegisterClass( 594 MCInst &Inst, unsigned RegNo, uint64_t /*Address*/, const void *Decoder) { 595 static const MCPhysReg GeneralDoubleLow8RegDecoderTable[] = { 596 Hexagon::D0, Hexagon::D1, Hexagon::D2, Hexagon::D3, 597 Hexagon::D8, Hexagon::D9, Hexagon::D10, Hexagon::D11}; 598 599 return DecodeRegisterClass(Inst, RegNo, GeneralDoubleLow8RegDecoderTable); 600 } 601 602 static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo, 603 uint64_t /*Address*/, 604 const void *Decoder) { 605 static const MCPhysReg HvxWRDecoderTable[] = { 606 Hexagon::W0, Hexagon::W1, Hexagon::W2, Hexagon::W3, 607 Hexagon::W4, Hexagon::W5, Hexagon::W6, Hexagon::W7, 608 Hexagon::W8, Hexagon::W9, Hexagon::W10, Hexagon::W11, 609 Hexagon::W12, Hexagon::W13, Hexagon::W14, Hexagon::W15}; 610 611 return (DecodeRegisterClass(Inst, RegNo >> 1, HvxWRDecoderTable)); 612 } 613 614 LLVM_ATTRIBUTE_UNUSED // Suppress warning temporarily. 615 static DecodeStatus DecodeHvxVQRRegisterClass(MCInst &Inst, 616 unsigned RegNo, 617 uint64_t /*Address*/, 618 const void *Decoder) { 619 static const MCPhysReg HvxVQRDecoderTable[] = { 620 Hexagon::VQ0, Hexagon::VQ1, Hexagon::VQ2, Hexagon::VQ3, 621 Hexagon::VQ4, Hexagon::VQ5, Hexagon::VQ6, Hexagon::VQ7}; 622 623 return DecodeRegisterClass(Inst, RegNo >> 2, HvxVQRDecoderTable); 624 } 625 626 static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo, 627 uint64_t /*Address*/, 628 const void *Decoder) { 629 static const MCPhysReg PredRegDecoderTable[] = {Hexagon::P0, Hexagon::P1, 630 Hexagon::P2, Hexagon::P3}; 631 632 return DecodeRegisterClass(Inst, RegNo, PredRegDecoderTable); 633 } 634 635 static DecodeStatus DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo, 636 uint64_t /*Address*/, 637 const void *Decoder) { 638 static const MCPhysReg HvxQRDecoderTable[] = {Hexagon::Q0, Hexagon::Q1, 639 Hexagon::Q2, Hexagon::Q3}; 640 641 return DecodeRegisterClass(Inst, RegNo, HvxQRDecoderTable); 642 } 643 644 static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo, 645 uint64_t /*Address*/, 646 const void *Decoder) { 647 using namespace Hexagon; 648 649 static const MCPhysReg CtrlRegDecoderTable[] = { 650 /* 0 */ SA0, LC0, SA1, LC1, 651 /* 4 */ P3_0, C5, M0, M1, 652 /* 8 */ USR, PC, UGP, GP, 653 /* 12 */ CS0, CS1, UPCYCLELO, UPCYCLEHI, 654 /* 16 */ FRAMELIMIT, FRAMEKEY, PKTCOUNTLO, PKTCOUNTHI, 655 /* 20 */ 0, 0, 0, 0, 656 /* 24 */ 0, 0, 0, 0, 657 /* 28 */ 0, 0, UTIMERLO, UTIMERHI 658 }; 659 660 if (RegNo >= array_lengthof(CtrlRegDecoderTable)) 661 return MCDisassembler::Fail; 662 663 static_assert(NoRegister == 0, "Expecting NoRegister to be 0"); 664 if (CtrlRegDecoderTable[RegNo] == NoRegister) 665 return MCDisassembler::Fail; 666 667 unsigned Register = CtrlRegDecoderTable[RegNo]; 668 Inst.addOperand(MCOperand::createReg(Register)); 669 return MCDisassembler::Success; 670 } 671 672 static DecodeStatus DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo, 673 uint64_t /*Address*/, 674 const void *Decoder) { 675 using namespace Hexagon; 676 677 static const MCPhysReg CtrlReg64DecoderTable[] = { 678 /* 0 */ C1_0, 0, C3_2, 0, 679 /* 4 */ C5_4, 0, C7_6, 0, 680 /* 8 */ C9_8, 0, C11_10, 0, 681 /* 12 */ CS, 0, UPCYCLE, 0, 682 /* 16 */ C17_16, 0, PKTCOUNT, 0, 683 /* 20 */ 0, 0, 0, 0, 684 /* 24 */ 0, 0, 0, 0, 685 /* 28 */ 0, 0, UTIMER, 0 686 }; 687 688 if (RegNo >= array_lengthof(CtrlReg64DecoderTable)) 689 return MCDisassembler::Fail; 690 691 static_assert(NoRegister == 0, "Expecting NoRegister to be 0"); 692 if (CtrlReg64DecoderTable[RegNo] == NoRegister) 693 return MCDisassembler::Fail; 694 695 unsigned Register = CtrlReg64DecoderTable[RegNo]; 696 Inst.addOperand(MCOperand::createReg(Register)); 697 return MCDisassembler::Success; 698 } 699 700 static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo, 701 uint64_t /*Address*/, 702 const void *Decoder) { 703 unsigned Register = 0; 704 switch (RegNo) { 705 case 0: 706 Register = Hexagon::M0; 707 break; 708 case 1: 709 Register = Hexagon::M1; 710 break; 711 default: 712 return MCDisassembler::Fail; 713 } 714 Inst.addOperand(MCOperand::createReg(Register)); 715 return MCDisassembler::Success; 716 } 717 718 static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp, 719 uint64_t /*Address*/, 720 const void *Decoder) { 721 HexagonDisassembler const &Disassembler = disassembler(Decoder); 722 int64_t FullValue = fullValue(Disassembler, MI, tmp); 723 assert(FullValue >= 0 && "Negative in unsigned decoder"); 724 HexagonMCInstrInfo::addConstant(MI, FullValue, Disassembler.getContext()); 725 return MCDisassembler::Success; 726 } 727 728 static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp, 729 uint64_t /*Address*/, const void *Decoder) { 730 HexagonDisassembler const &Disassembler = disassembler(Decoder); 731 unsigned Bits = HexagonMCInstrInfo::getExtentBits(*Disassembler.MCII, MI); 732 tmp = SignExtend64(tmp, Bits); 733 signedDecoder<32>(MI, tmp, Decoder); 734 return MCDisassembler::Success; 735 } 736 737 // custom decoder for various jump/call immediates 738 static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address, 739 const void *Decoder) { 740 HexagonDisassembler const &Disassembler = disassembler(Decoder); 741 unsigned Bits = HexagonMCInstrInfo::getExtentBits(*Disassembler.MCII, MI); 742 // r13_2 is not extendable, so if there are no extent bits, it's r13_2 743 if (Bits == 0) 744 Bits = 15; 745 uint64_t FullValue = fullValue(Disassembler, MI, SignExtend64(tmp, Bits)); 746 uint32_t Extended = FullValue + Address; 747 if (!Disassembler.tryAddingSymbolicOperand(MI, Extended, Address, true, 0, 4)) 748 HexagonMCInstrInfo::addConstant(MI, Extended, Disassembler.getContext()); 749 return MCDisassembler::Success; 750 } 751 752 static DecodeStatus DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo, 753 uint64_t /*Address*/, 754 const void *Decoder) { 755 using namespace Hexagon; 756 757 static const MCPhysReg GuestRegDecoderTable[] = { 758 /* 0 */ GELR, GSR, GOSP, G3, 759 /* 4 */ G4, G5, G6, G7, 760 /* 8 */ G8, G9, G10, G11, 761 /* 12 */ G12, G13, G14, G15, 762 /* 16 */ GPMUCNT4, GPMUCNT5, GPMUCNT6, GPMUCNT7, 763 /* 20 */ G20, G21, G22, G23, 764 /* 24 */ GPCYCLELO, GPCYCLEHI, GPMUCNT0, GPMUCNT1, 765 /* 28 */ GPMUCNT2, GPMUCNT3, G30, G31 766 }; 767 768 if (RegNo >= array_lengthof(GuestRegDecoderTable)) 769 return MCDisassembler::Fail; 770 if (GuestRegDecoderTable[RegNo] == Hexagon::NoRegister) 771 return MCDisassembler::Fail; 772 773 unsigned Register = GuestRegDecoderTable[RegNo]; 774 Inst.addOperand(MCOperand::createReg(Register)); 775 return MCDisassembler::Success; 776 } 777 778 static DecodeStatus DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo, 779 uint64_t /*Address*/, 780 const void *Decoder) { 781 using namespace Hexagon; 782 783 static const MCPhysReg GuestReg64DecoderTable[] = { 784 /* 0 */ G1_0, 0, G3_2, 0, 785 /* 4 */ G5_4, 0, G7_6, 0, 786 /* 8 */ G9_8, 0, G11_10, 0, 787 /* 12 */ G13_12, 0, G15_14, 0, 788 /* 16 */ G17_16, 0, G19_18, 0, 789 /* 20 */ G21_20, 0, G23_22, 0, 790 /* 24 */ G25_24, 0, G27_26, 0, 791 /* 28 */ G29_28, 0, G31_30, 0 792 }; 793 794 if (RegNo >= array_lengthof(GuestReg64DecoderTable)) 795 return MCDisassembler::Fail; 796 if (GuestReg64DecoderTable[RegNo] == Hexagon::NoRegister) 797 return MCDisassembler::Fail; 798 799 unsigned Register = GuestReg64DecoderTable[RegNo]; 800 Inst.addOperand(MCOperand::createReg(Register)); 801 return MCDisassembler::Success; 802 } 803