ARMDisassembler.cpp revision 360660
1//===- ARMDisassembler.cpp - Disassembler for ARM/Thumb 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#include "ARMBaseInstrInfo.h" 10#include "MCTargetDesc/ARMAddressingModes.h" 11#include "MCTargetDesc/ARMBaseInfo.h" 12#include "MCTargetDesc/ARMMCTargetDesc.h" 13#include "TargetInfo/ARMTargetInfo.h" 14#include "Utils/ARMBaseInfo.h" 15#include "llvm/MC/MCContext.h" 16#include "llvm/MC/MCDisassembler/MCDisassembler.h" 17#include "llvm/MC/MCFixedLenDisassembler.h" 18#include "llvm/MC/MCInst.h" 19#include "llvm/MC/MCInstrDesc.h" 20#include "llvm/MC/MCSubtargetInfo.h" 21#include "llvm/MC/SubtargetFeature.h" 22#include "llvm/Support/Compiler.h" 23#include "llvm/Support/ErrorHandling.h" 24#include "llvm/Support/MathExtras.h" 25#include "llvm/Support/TargetRegistry.h" 26#include "llvm/Support/raw_ostream.h" 27#include <algorithm> 28#include <cassert> 29#include <cstdint> 30#include <vector> 31 32using namespace llvm; 33 34#define DEBUG_TYPE "arm-disassembler" 35 36using DecodeStatus = MCDisassembler::DecodeStatus; 37 38namespace { 39 40 // Handles the condition code status of instructions in IT blocks 41 class ITStatus 42 { 43 public: 44 // Returns the condition code for instruction in IT block 45 unsigned getITCC() { 46 unsigned CC = ARMCC::AL; 47 if (instrInITBlock()) 48 CC = ITStates.back(); 49 return CC; 50 } 51 52 // Advances the IT block state to the next T or E 53 void advanceITState() { 54 ITStates.pop_back(); 55 } 56 57 // Returns true if the current instruction is in an IT block 58 bool instrInITBlock() { 59 return !ITStates.empty(); 60 } 61 62 // Returns true if current instruction is the last instruction in an IT block 63 bool instrLastInITBlock() { 64 return ITStates.size() == 1; 65 } 66 67 // Called when decoding an IT instruction. Sets the IT state for 68 // the following instructions that for the IT block. Firstcond 69 // corresponds to the field in the IT instruction encoding; Mask 70 // is in the MCOperand format in which 1 means 'else' and 0 'then'. 71 void setITState(char Firstcond, char Mask) { 72 // (3 - the number of trailing zeros) is the number of then / else. 73 unsigned NumTZ = countTrailingZeros<uint8_t>(Mask); 74 unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf); 75 assert(NumTZ <= 3 && "Invalid IT mask!"); 76 // push condition codes onto the stack the correct order for the pops 77 for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) { 78 unsigned Else = (Mask >> Pos) & 1; 79 ITStates.push_back(CCBits ^ Else); 80 } 81 ITStates.push_back(CCBits); 82 } 83 84 private: 85 std::vector<unsigned char> ITStates; 86 }; 87 88 class VPTStatus 89 { 90 public: 91 unsigned getVPTPred() { 92 unsigned Pred = ARMVCC::None; 93 if (instrInVPTBlock()) 94 Pred = VPTStates.back(); 95 return Pred; 96 } 97 98 void advanceVPTState() { 99 VPTStates.pop_back(); 100 } 101 102 bool instrInVPTBlock() { 103 return !VPTStates.empty(); 104 } 105 106 bool instrLastInVPTBlock() { 107 return VPTStates.size() == 1; 108 } 109 110 void setVPTState(char Mask) { 111 // (3 - the number of trailing zeros) is the number of then / else. 112 unsigned NumTZ = countTrailingZeros<uint8_t>(Mask); 113 assert(NumTZ <= 3 && "Invalid VPT mask!"); 114 // push predicates onto the stack the correct order for the pops 115 for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) { 116 bool T = ((Mask >> Pos) & 1) == 0; 117 if (T) 118 VPTStates.push_back(ARMVCC::Then); 119 else 120 VPTStates.push_back(ARMVCC::Else); 121 } 122 VPTStates.push_back(ARMVCC::Then); 123 } 124 125 private: 126 SmallVector<unsigned char, 4> VPTStates; 127 }; 128 129/// ARM disassembler for all ARM platforms. 130class ARMDisassembler : public MCDisassembler { 131public: 132 ARMDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) : 133 MCDisassembler(STI, Ctx) { 134 } 135 136 ~ARMDisassembler() override = default; 137 138 DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, 139 ArrayRef<uint8_t> Bytes, uint64_t Address, 140 raw_ostream &VStream, 141 raw_ostream &CStream) const override; 142 143private: 144 DecodeStatus getARMInstruction(MCInst &Instr, uint64_t &Size, 145 ArrayRef<uint8_t> Bytes, uint64_t Address, 146 raw_ostream &VStream, 147 raw_ostream &CStream) const; 148 149 DecodeStatus getThumbInstruction(MCInst &Instr, uint64_t &Size, 150 ArrayRef<uint8_t> Bytes, uint64_t Address, 151 raw_ostream &VStream, 152 raw_ostream &CStream) const; 153 154 mutable ITStatus ITBlock; 155 mutable VPTStatus VPTBlock; 156 157 DecodeStatus AddThumbPredicate(MCInst&) const; 158 void UpdateThumbVFPPredicate(DecodeStatus &, MCInst&) const; 159}; 160 161} // end anonymous namespace 162 163static bool Check(DecodeStatus &Out, DecodeStatus In) { 164 switch (In) { 165 case MCDisassembler::Success: 166 // Out stays the same. 167 return true; 168 case MCDisassembler::SoftFail: 169 Out = In; 170 return true; 171 case MCDisassembler::Fail: 172 Out = In; 173 return false; 174 } 175 llvm_unreachable("Invalid DecodeStatus!"); 176} 177 178// Forward declare these because the autogenerated code will reference them. 179// Definitions are further down. 180static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo, 181 uint64_t Address, const void *Decoder); 182static DecodeStatus DecodeCLRMGPRRegisterClass(MCInst &Inst, unsigned RegNo, 183 uint64_t Address, const void *Decoder); 184static DecodeStatus DecodetGPROddRegisterClass(MCInst &Inst, unsigned RegNo, 185 uint64_t Address, const void *Decoder); 186static DecodeStatus DecodetGPREvenRegisterClass(MCInst &Inst, unsigned RegNo, 187 uint64_t Address, const void *Decoder); 188static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst, 189 unsigned RegNo, uint64_t Address, 190 const void *Decoder); 191static DecodeStatus DecodeGPRwithAPSRRegisterClass(MCInst &Inst, 192 unsigned RegNo, uint64_t Address, 193 const void *Decoder); 194static DecodeStatus DecodeGPRwithZRRegisterClass(MCInst &Inst, 195 unsigned RegNo, uint64_t Address, 196 const void *Decoder); 197static DecodeStatus DecodeGPRwithZRnospRegisterClass( 198 MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder); 199static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo, 200 uint64_t Address, const void *Decoder); 201static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo, 202 uint64_t Address, const void *Decoder); 203static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo, 204 uint64_t Address, const void *Decoder); 205static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo, 206 uint64_t Address, const void *Decoder); 207static DecodeStatus DecodeHPRRegisterClass(MCInst &Inst, unsigned RegNo, 208 uint64_t Address, const void *Decoder); 209static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo, 210 uint64_t Address, const void *Decoder); 211static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo, 212 uint64_t Address, const void *Decoder); 213static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo, 214 uint64_t Address, const void *Decoder); 215static DecodeStatus DecodeSPR_8RegisterClass(MCInst &Inst, unsigned RegNo, 216 uint64_t Address, const void *Decoder); 217static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst, 218 unsigned RegNo, 219 uint64_t Address, 220 const void *Decoder); 221static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo, 222 uint64_t Address, const void *Decoder); 223static DecodeStatus DecodeMQPRRegisterClass(MCInst &Inst, unsigned RegNo, 224 uint64_t Address, const void *Decoder); 225static DecodeStatus DecodeQQPRRegisterClass(MCInst &Inst, unsigned RegNo, 226 uint64_t Address, const void *Decoder); 227static DecodeStatus DecodeQQQQPRRegisterClass(MCInst &Inst, unsigned RegNo, 228 uint64_t Address, const void *Decoder); 229static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo, 230 uint64_t Address, const void *Decoder); 231static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst, 232 unsigned RegNo, uint64_t Address, 233 const void *Decoder); 234 235static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val, 236 uint64_t Address, const void *Decoder); 237static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val, 238 uint64_t Address, const void *Decoder); 239static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val, 240 uint64_t Address, const void *Decoder); 241static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val, 242 uint64_t Address, const void *Decoder); 243static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val, 244 uint64_t Address, const void *Decoder); 245 246static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn, 247 uint64_t Address, const void *Decoder); 248static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn, 249 uint64_t Address, const void *Decoder); 250static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst, 251 unsigned Insn, 252 uint64_t Address, 253 const void *Decoder); 254static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn, 255 uint64_t Address, const void *Decoder); 256static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn, 257 uint64_t Address, const void *Decoder); 258static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn, 259 uint64_t Address, const void *Decoder); 260static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn, 261 uint64_t Address, const void *Decoder); 262 263static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst, 264 unsigned Insn, 265 uint64_t Adddress, 266 const void *Decoder); 267static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn, 268 uint64_t Address, const void *Decoder); 269static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn, 270 uint64_t Address, const void *Decoder); 271static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn, 272 uint64_t Address, const void *Decoder); 273static DecodeStatus DecodeHINTInstruction(MCInst &Inst, unsigned Insn, 274 uint64_t Address, const void *Decoder); 275static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn, 276 uint64_t Address, const void *Decoder); 277static DecodeStatus DecodeTSTInstruction(MCInst &Inst, unsigned Insn, 278 uint64_t Address, const void *Decoder); 279static DecodeStatus DecodeSETPANInstruction(MCInst &Inst, unsigned Insn, 280 uint64_t Address, const void *Decoder); 281static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn, 282 uint64_t Address, const void *Decoder); 283static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val, 284 uint64_t Address, const void *Decoder); 285static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val, 286 uint64_t Address, const void *Decoder); 287static DecodeStatus DecodeAddrMode5FP16Operand(MCInst &Inst, unsigned Val, 288 uint64_t Address, const void *Decoder); 289static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val, 290 uint64_t Address, const void *Decoder); 291static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn, 292 uint64_t Address, const void *Decoder); 293static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn, 294 uint64_t Address, const void *Decoder); 295static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val, 296 uint64_t Address, const void *Decoder); 297static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Val, 298 uint64_t Address, const void *Decoder); 299static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Val, 300 uint64_t Address, const void *Decoder); 301static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Val, 302 uint64_t Address, const void *Decoder); 303static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Val, 304 uint64_t Address, const void *Decoder); 305static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val, 306 uint64_t Address, const void *Decoder); 307static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val, 308 uint64_t Address, const void *Decoder); 309static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val, 310 uint64_t Address, const void *Decoder); 311static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val, 312 uint64_t Address, const void *Decoder); 313static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val, 314 uint64_t Address, const void *Decoder); 315static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val, 316 uint64_t Address, const void *Decoder); 317static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val, 318 uint64_t Address, const void *Decoder); 319static DecodeStatus DecodeMVEModImmInstruction(MCInst &Inst,unsigned Val, 320 uint64_t Address, const void *Decoder); 321static DecodeStatus DecodeMVEVADCInstruction(MCInst &Inst, unsigned Insn, 322 uint64_t Address, const void *Decoder); 323static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val, 324 uint64_t Address, const void *Decoder); 325static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val, 326 uint64_t Address, const void *Decoder); 327static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val, 328 uint64_t Address, const void *Decoder); 329static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val, 330 uint64_t Address, const void *Decoder); 331static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val, 332 uint64_t Address, const void *Decoder); 333static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn, 334 uint64_t Address, const void *Decoder); 335static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn, 336 uint64_t Address, const void *Decoder); 337static DecodeStatus DecodeMveAddrModeRQ(MCInst &Inst, unsigned Insn, 338 uint64_t Address, const void *Decoder); 339template<int shift> 340static DecodeStatus DecodeMveAddrModeQ(MCInst &Inst, unsigned Insn, 341 uint64_t Address, const void *Decoder); 342static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn, 343 uint64_t Address, const void *Decoder); 344static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn, 345 uint64_t Address, const void *Decoder); 346static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Insn, 347 uint64_t Address, const void *Decoder); 348static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn, 349 uint64_t Address, const void *Decoder); 350static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Insn, 351 uint64_t Address, const void *Decoder); 352static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn, 353 uint64_t Address, const void *Decoder); 354static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn, 355 uint64_t Address, const void *Decoder); 356static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn, 357 uint64_t Address, const void *Decoder); 358static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn, 359 uint64_t Address, const void *Decoder); 360static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn, 361 uint64_t Address, const void *Decoder); 362static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn, 363 uint64_t Address, const void *Decoder); 364static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn, 365 uint64_t Address, const void *Decoder); 366static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn, 367 uint64_t Address, const void *Decoder); 368static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn, 369 uint64_t Address, const void *Decoder); 370static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn, 371 uint64_t Address, const void *Decoder); 372static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn, 373 uint64_t Address, const void *Decoder); 374static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn, 375 uint64_t Address, const void *Decoder); 376static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn, 377 uint64_t Address, const void *Decoder); 378static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn, 379 uint64_t Address, const void *Decoder); 380static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn, 381 uint64_t Address, const void *Decoder); 382static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn, 383 uint64_t Address, const void *Decoder); 384static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn, 385 uint64_t Address, const void *Decoder); 386static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn, 387 uint64_t Address, const void *Decoder); 388static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn, 389 uint64_t Address, const void *Decoder); 390static DecodeStatus DecodeVCVTImmOperand(MCInst &Inst, unsigned Insn, 391 uint64_t Address, const void *Decoder); 392static DecodeStatus DecodeNEONComplexLane64Instruction(MCInst &Inst, 393 unsigned Val, 394 uint64_t Address, 395 const void *Decoder); 396 397static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn, 398 uint64_t Address, const void *Decoder); 399static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val, 400 uint64_t Address, const void *Decoder); 401static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val, 402 uint64_t Address, const void *Decoder); 403static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val, 404 uint64_t Address, const void *Decoder); 405static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val, 406 uint64_t Address, const void *Decoder); 407static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val, 408 uint64_t Address, const void *Decoder); 409static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val, 410 uint64_t Address, const void *Decoder); 411static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val, 412 uint64_t Address, const void *Decoder); 413static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val, 414 uint64_t Address, const void *Decoder); 415static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val, 416 uint64_t Address, const void *Decoder); 417static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn, 418 uint64_t Address, const void* Decoder); 419static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn, 420 uint64_t Address, const void* Decoder); 421static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn, 422 uint64_t Address, const void* Decoder); 423static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn, 424 uint64_t Address, const void* Decoder); 425static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val, 426 uint64_t Address, const void *Decoder); 427static DecodeStatus DecodeT2Imm7S4(MCInst &Inst, unsigned Val, 428 uint64_t Address, const void *Decoder); 429static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val, 430 uint64_t Address, const void *Decoder); 431static DecodeStatus DecodeT2AddrModeImm7s4(MCInst &Inst, unsigned Val, 432 uint64_t Address, 433 const void *Decoder); 434static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val, 435 uint64_t Address, const void *Decoder); 436static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val, 437 uint64_t Address, const void *Decoder); 438template<int shift> 439static DecodeStatus DecodeT2Imm7(MCInst &Inst, unsigned Val, 440 uint64_t Address, const void *Decoder); 441static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val, 442 uint64_t Address, const void *Decoder); 443template<int shift> 444static DecodeStatus DecodeTAddrModeImm7(MCInst &Inst, unsigned Val, 445 uint64_t Address, const void *Decoder); 446template<int shift, int WriteBack> 447static DecodeStatus DecodeT2AddrModeImm7(MCInst &Inst, unsigned Val, 448 uint64_t Address, const void *Decoder); 449static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val, 450 uint64_t Address, const void *Decoder); 451static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn, 452 uint64_t Address, const void *Decoder); 453static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn, 454 uint64_t Address, const void *Decoder); 455static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn, 456 uint64_t Address, const void *Decoder); 457static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn, 458 uint64_t Address, const void *Decoder); 459static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val, 460 uint64_t Address, const void *Decoder); 461static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val, 462 uint64_t Address, const void *Decoder); 463static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val, 464 uint64_t Address, const void *Decoder); 465static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val, 466 uint64_t Address, const void *Decoder); 467static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val, 468 uint64_t Address, const void *Decoder); 469static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val, 470 uint64_t Address, const void *Decoder); 471static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val, 472 uint64_t Address, const void *Decoder); 473static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn, 474 uint64_t Address, const void *Decoder); 475static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn, 476 uint64_t Address, const void *Decoder); 477static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val, 478 uint64_t Address, const void *Decoder); 479static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val, 480 uint64_t Address, const void *Decoder); 481static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val, 482 uint64_t Address, const void *Decoder); 483 484static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val, 485 uint64_t Address, const void *Decoder); 486static DecodeStatus DecoderForMRRC2AndMCRR2(MCInst &Inst, unsigned Val, 487 uint64_t Address, const void *Decoder); 488static DecodeStatus DecodeForVMRSandVMSR(MCInst &Inst, unsigned Val, 489 uint64_t Address, const void *Decoder); 490 491template <bool isSigned, bool isNeg, bool zeroPermitted, int size> 492static DecodeStatus DecodeBFLabelOperand(MCInst &Inst, unsigned val, 493 uint64_t Address, const void *Decoder); 494static DecodeStatus DecodeBFAfterTargetOperand(MCInst &Inst, unsigned val, 495 uint64_t Address, 496 const void *Decoder); 497static DecodeStatus DecodePredNoALOperand(MCInst &Inst, unsigned Val, 498 uint64_t Address, 499 const void *Decoder); 500static DecodeStatus DecodeLOLoop(MCInst &Inst, unsigned Insn, uint64_t Address, 501 const void *Decoder); 502static DecodeStatus DecodeLongShiftOperand(MCInst &Inst, unsigned Val, 503 uint64_t Address, 504 const void *Decoder); 505static DecodeStatus DecodeVSCCLRM(MCInst &Inst, unsigned Insn, uint64_t Address, 506 const void *Decoder); 507static DecodeStatus DecodeVPTMaskOperand(MCInst &Inst, unsigned Val, 508 uint64_t Address, const void *Decoder); 509static DecodeStatus DecodeVpredROperand(MCInst &Inst, unsigned Val, 510 uint64_t Address, const void *Decoder); 511static DecodeStatus DecodeRestrictedIPredicateOperand(MCInst &Inst, unsigned Val, 512 uint64_t Address, 513 const void *Decoder); 514static DecodeStatus DecodeRestrictedSPredicateOperand(MCInst &Inst, unsigned Val, 515 uint64_t Address, 516 const void *Decoder); 517static DecodeStatus DecodeRestrictedUPredicateOperand(MCInst &Inst, unsigned Val, 518 uint64_t Address, 519 const void *Decoder); 520static DecodeStatus DecodeRestrictedFPPredicateOperand(MCInst &Inst, 521 unsigned Val, 522 uint64_t Address, 523 const void *Decoder); 524template<bool Writeback> 525static DecodeStatus DecodeVSTRVLDR_SYSREG(MCInst &Inst, unsigned Insn, 526 uint64_t Address, 527 const void *Decoder); 528template<int shift> 529static DecodeStatus DecodeMVE_MEM_1_pre(MCInst &Inst, unsigned Val, 530 uint64_t Address, const void *Decoder); 531template<int shift> 532static DecodeStatus DecodeMVE_MEM_2_pre(MCInst &Inst, unsigned Val, 533 uint64_t Address, const void *Decoder); 534template<int shift> 535static DecodeStatus DecodeMVE_MEM_3_pre(MCInst &Inst, unsigned Val, 536 uint64_t Address, const void *Decoder); 537template<unsigned MinLog, unsigned MaxLog> 538static DecodeStatus DecodePowerTwoOperand(MCInst &Inst, unsigned Val, 539 uint64_t Address, 540 const void *Decoder); 541template <int shift> 542static DecodeStatus DecodeExpandedImmOperand(MCInst &Inst, unsigned Val, 543 uint64_t Address, 544 const void *Decoder); 545template<unsigned start> 546static DecodeStatus DecodeMVEPairVectorIndexOperand(MCInst &Inst, unsigned Val, 547 uint64_t Address, 548 const void *Decoder); 549static DecodeStatus DecodeMVEVMOVQtoDReg(MCInst &Inst, unsigned Insn, 550 uint64_t Address, 551 const void *Decoder); 552static DecodeStatus DecodeMVEVMOVDRegtoQ(MCInst &Inst, unsigned Insn, 553 uint64_t Address, 554 const void *Decoder); 555static DecodeStatus DecodeMVEVCVTt1fp(MCInst &Inst, unsigned Insn, 556 uint64_t Address, const void *Decoder); 557typedef DecodeStatus OperandDecoder(MCInst &Inst, unsigned Val, 558 uint64_t Address, const void *Decoder); 559template<bool scalar, OperandDecoder predicate_decoder> 560static DecodeStatus DecodeMVEVCMP(MCInst &Inst, unsigned Insn, 561 uint64_t Address, const void *Decoder); 562static DecodeStatus DecodeMveVCTP(MCInst &Inst, unsigned Insn, 563 uint64_t Address, const void *Decoder); 564static DecodeStatus DecodeMVEOverlappingLongShift(MCInst &Inst, unsigned Insn, 565 uint64_t Address, 566 const void *Decoder); 567#include "ARMGenDisassemblerTables.inc" 568 569static MCDisassembler *createARMDisassembler(const Target &T, 570 const MCSubtargetInfo &STI, 571 MCContext &Ctx) { 572 return new ARMDisassembler(STI, Ctx); 573} 574 575// Post-decoding checks 576static DecodeStatus checkDecodedInstruction(MCInst &MI, uint64_t &Size, 577 uint64_t Address, raw_ostream &OS, 578 raw_ostream &CS, 579 uint32_t Insn, 580 DecodeStatus Result) { 581 switch (MI.getOpcode()) { 582 case ARM::HVC: { 583 // HVC is undefined if condition = 0xf otherwise upredictable 584 // if condition != 0xe 585 uint32_t Cond = (Insn >> 28) & 0xF; 586 if (Cond == 0xF) 587 return MCDisassembler::Fail; 588 if (Cond != 0xE) 589 return MCDisassembler::SoftFail; 590 return Result; 591 } 592 case ARM::t2ADDri: 593 case ARM::t2ADDri12: 594 case ARM::t2ADDrr: 595 case ARM::t2ADDrs: 596 case ARM::t2SUBri: 597 case ARM::t2SUBri12: 598 case ARM::t2SUBrr: 599 case ARM::t2SUBrs: 600 if (MI.getOperand(0).getReg() == ARM::SP && 601 MI.getOperand(1).getReg() != ARM::SP) 602 return MCDisassembler::SoftFail; 603 return Result; 604 default: return Result; 605 } 606} 607 608DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size, 609 ArrayRef<uint8_t> Bytes, 610 uint64_t Address, raw_ostream &OS, 611 raw_ostream &CS) const { 612 if (STI.getFeatureBits()[ARM::ModeThumb]) 613 return getThumbInstruction(MI, Size, Bytes, Address, OS, CS); 614 return getARMInstruction(MI, Size, Bytes, Address, OS, CS); 615} 616 617DecodeStatus ARMDisassembler::getARMInstruction(MCInst &MI, uint64_t &Size, 618 ArrayRef<uint8_t> Bytes, 619 uint64_t Address, 620 raw_ostream &OS, 621 raw_ostream &CS) const { 622 CommentStream = &CS; 623 624 assert(!STI.getFeatureBits()[ARM::ModeThumb] && 625 "Asked to disassemble an ARM instruction but Subtarget is in Thumb " 626 "mode!"); 627 628 // We want to read exactly 4 bytes of data. 629 if (Bytes.size() < 4) { 630 Size = 0; 631 return MCDisassembler::Fail; 632 } 633 634 // Encoded as a small-endian 32-bit word in the stream. 635 uint32_t Insn = 636 (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0); 637 638 // Calling the auto-generated decoder function. 639 DecodeStatus Result = 640 decodeInstruction(DecoderTableARM32, MI, Insn, Address, this, STI); 641 if (Result != MCDisassembler::Fail) { 642 Size = 4; 643 return checkDecodedInstruction(MI, Size, Address, OS, CS, Insn, Result); 644 } 645 646 struct DecodeTable { 647 const uint8_t *P; 648 bool DecodePred; 649 }; 650 651 const DecodeTable Tables[] = { 652 {DecoderTableVFP32, false}, {DecoderTableVFPV832, false}, 653 {DecoderTableNEONData32, true}, {DecoderTableNEONLoadStore32, true}, 654 {DecoderTableNEONDup32, true}, {DecoderTablev8NEON32, false}, 655 {DecoderTablev8Crypto32, false}, 656 }; 657 658 for (auto Table : Tables) { 659 Result = decodeInstruction(Table.P, MI, Insn, Address, this, STI); 660 if (Result != MCDisassembler::Fail) { 661 Size = 4; 662 // Add a fake predicate operand, because we share these instruction 663 // definitions with Thumb2 where these instructions are predicable. 664 if (Table.DecodePred && !DecodePredicateOperand(MI, 0xE, Address, this)) 665 return MCDisassembler::Fail; 666 return Result; 667 } 668 } 669 670 Result = 671 decodeInstruction(DecoderTableCoProc32, MI, Insn, Address, this, STI); 672 if (Result != MCDisassembler::Fail) { 673 Size = 4; 674 return checkDecodedInstruction(MI, Size, Address, OS, CS, Insn, Result); 675 } 676 677 Size = 4; 678 return MCDisassembler::Fail; 679} 680 681namespace llvm { 682 683extern const MCInstrDesc ARMInsts[]; 684 685} // end namespace llvm 686 687/// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the 688/// immediate Value in the MCInst. The immediate Value has had any PC 689/// adjustment made by the caller. If the instruction is a branch instruction 690/// then isBranch is true, else false. If the getOpInfo() function was set as 691/// part of the setupForSymbolicDisassembly() call then that function is called 692/// to get any symbolic information at the Address for this instruction. If 693/// that returns non-zero then the symbolic information it returns is used to 694/// create an MCExpr and that is added as an operand to the MCInst. If 695/// getOpInfo() returns zero and isBranch is true then a symbol look up for 696/// Value is done and if a symbol is found an MCExpr is created with that, else 697/// an MCExpr with Value is created. This function returns true if it adds an 698/// operand to the MCInst and false otherwise. 699static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value, 700 bool isBranch, uint64_t InstSize, 701 MCInst &MI, const void *Decoder) { 702 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder); 703 // FIXME: Does it make sense for value to be negative? 704 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch, 705 /* Offset */ 0, InstSize); 706} 707 708/// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being 709/// referenced by a load instruction with the base register that is the Pc. 710/// These can often be values in a literal pool near the Address of the 711/// instruction. The Address of the instruction and its immediate Value are 712/// used as a possible literal pool entry. The SymbolLookUp call back will 713/// return the name of a symbol referenced by the literal pool's entry if 714/// the referenced address is that of a symbol. Or it will return a pointer to 715/// a literal 'C' string if the referenced address of the literal pool's entry 716/// is an address into a section with 'C' string literals. 717static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value, 718 const void *Decoder) { 719 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder); 720 Dis->tryAddingPcLoadReferenceComment(Value, Address); 721} 722 723// Thumb1 instructions don't have explicit S bits. Rather, they 724// implicitly set CPSR. Since it's not represented in the encoding, the 725// auto-generated decoder won't inject the CPSR operand. We need to fix 726// that as a post-pass. 727static void AddThumb1SBit(MCInst &MI, bool InITBlock) { 728 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo; 729 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands; 730 MCInst::iterator I = MI.begin(); 731 for (unsigned i = 0; i < NumOps; ++i, ++I) { 732 if (I == MI.end()) break; 733 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) { 734 if (i > 0 && OpInfo[i-1].isPredicate()) continue; 735 MI.insert(I, MCOperand::createReg(InITBlock ? 0 : ARM::CPSR)); 736 return; 737 } 738 } 739 740 MI.insert(I, MCOperand::createReg(InITBlock ? 0 : ARM::CPSR)); 741} 742 743static bool isVectorPredicable(unsigned Opcode) { 744 const MCOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo; 745 unsigned short NumOps = ARMInsts[Opcode].NumOperands; 746 for (unsigned i = 0; i < NumOps; ++i) { 747 if (ARM::isVpred(OpInfo[i].OperandType)) 748 return true; 749 } 750 return false; 751} 752 753// Most Thumb instructions don't have explicit predicates in the 754// encoding, but rather get their predicates from IT context. We need 755// to fix up the predicate operands using this context information as a 756// post-pass. 757MCDisassembler::DecodeStatus 758ARMDisassembler::AddThumbPredicate(MCInst &MI) const { 759 MCDisassembler::DecodeStatus S = Success; 760 761 const FeatureBitset &FeatureBits = getSubtargetInfo().getFeatureBits(); 762 763 // A few instructions actually have predicates encoded in them. Don't 764 // try to overwrite it if we're seeing one of those. 765 switch (MI.getOpcode()) { 766 case ARM::tBcc: 767 case ARM::t2Bcc: 768 case ARM::tCBZ: 769 case ARM::tCBNZ: 770 case ARM::tCPS: 771 case ARM::t2CPS3p: 772 case ARM::t2CPS2p: 773 case ARM::t2CPS1p: 774 case ARM::t2CSEL: 775 case ARM::t2CSINC: 776 case ARM::t2CSINV: 777 case ARM::t2CSNEG: 778 case ARM::tMOVSr: 779 case ARM::tSETEND: 780 // Some instructions (mostly conditional branches) are not 781 // allowed in IT blocks. 782 if (ITBlock.instrInITBlock()) 783 S = SoftFail; 784 else 785 return Success; 786 break; 787 case ARM::t2HINT: 788 if (MI.getOperand(0).getImm() == 0x10 && (FeatureBits[ARM::FeatureRAS]) != 0) 789 S = SoftFail; 790 break; 791 case ARM::tB: 792 case ARM::t2B: 793 case ARM::t2TBB: 794 case ARM::t2TBH: 795 // Some instructions (mostly unconditional branches) can 796 // only appears at the end of, or outside of, an IT. 797 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock()) 798 S = SoftFail; 799 break; 800 default: 801 break; 802 } 803 804 // Warn on non-VPT predicable instruction in a VPT block and a VPT 805 // predicable instruction in an IT block 806 if ((!isVectorPredicable(MI.getOpcode()) && VPTBlock.instrInVPTBlock()) || 807 (isVectorPredicable(MI.getOpcode()) && ITBlock.instrInITBlock())) 808 S = SoftFail; 809 810 // If we're in an IT/VPT block, base the predicate on that. Otherwise, 811 // assume a predicate of AL. 812 unsigned CC = ARMCC::AL; 813 unsigned VCC = ARMVCC::None; 814 if (ITBlock.instrInITBlock()) { 815 CC = ITBlock.getITCC(); 816 ITBlock.advanceITState(); 817 } else if (VPTBlock.instrInVPTBlock()) { 818 VCC = VPTBlock.getVPTPred(); 819 VPTBlock.advanceVPTState(); 820 } 821 822 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo; 823 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands; 824 825 MCInst::iterator CCI = MI.begin(); 826 for (unsigned i = 0; i < NumOps; ++i, ++CCI) { 827 if (OpInfo[i].isPredicate() || CCI == MI.end()) break; 828 } 829 830 if (ARMInsts[MI.getOpcode()].isPredicable()) { 831 CCI = MI.insert(CCI, MCOperand::createImm(CC)); 832 ++CCI; 833 if (CC == ARMCC::AL) 834 MI.insert(CCI, MCOperand::createReg(0)); 835 else 836 MI.insert(CCI, MCOperand::createReg(ARM::CPSR)); 837 } else if (CC != ARMCC::AL) { 838 Check(S, SoftFail); 839 } 840 841 MCInst::iterator VCCI = MI.begin(); 842 unsigned VCCPos; 843 for (VCCPos = 0; VCCPos < NumOps; ++VCCPos, ++VCCI) { 844 if (ARM::isVpred(OpInfo[VCCPos].OperandType) || VCCI == MI.end()) break; 845 } 846 847 if (isVectorPredicable(MI.getOpcode())) { 848 VCCI = MI.insert(VCCI, MCOperand::createImm(VCC)); 849 ++VCCI; 850 if (VCC == ARMVCC::None) 851 MI.insert(VCCI, MCOperand::createReg(0)); 852 else 853 MI.insert(VCCI, MCOperand::createReg(ARM::P0)); 854 if (OpInfo[VCCPos].OperandType == ARM::OPERAND_VPRED_R) { 855 int TiedOp = ARMInsts[MI.getOpcode()].getOperandConstraint( 856 VCCPos + 2, MCOI::TIED_TO); 857 assert(TiedOp >= 0 && 858 "Inactive register in vpred_r is not tied to an output!"); 859 MI.insert(VCCI, MI.getOperand(TiedOp)); 860 } 861 } else if (VCC != ARMVCC::None) { 862 Check(S, SoftFail); 863 } 864 865 return S; 866} 867 868// Thumb VFP instructions are a special case. Because we share their 869// encodings between ARM and Thumb modes, and they are predicable in ARM 870// mode, the auto-generated decoder will give them an (incorrect) 871// predicate operand. We need to rewrite these operands based on the IT 872// context as a post-pass. 873void ARMDisassembler::UpdateThumbVFPPredicate( 874 DecodeStatus &S, MCInst &MI) const { 875 unsigned CC; 876 CC = ITBlock.getITCC(); 877 if (CC == 0xF) 878 CC = ARMCC::AL; 879 if (ITBlock.instrInITBlock()) 880 ITBlock.advanceITState(); 881 else if (VPTBlock.instrInVPTBlock()) { 882 CC = VPTBlock.getVPTPred(); 883 VPTBlock.advanceVPTState(); 884 } 885 886 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo; 887 MCInst::iterator I = MI.begin(); 888 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands; 889 for (unsigned i = 0; i < NumOps; ++i, ++I) { 890 if (OpInfo[i].isPredicate() ) { 891 if (CC != ARMCC::AL && !ARMInsts[MI.getOpcode()].isPredicable()) 892 Check(S, SoftFail); 893 I->setImm(CC); 894 ++I; 895 if (CC == ARMCC::AL) 896 I->setReg(0); 897 else 898 I->setReg(ARM::CPSR); 899 return; 900 } 901 } 902} 903 904DecodeStatus ARMDisassembler::getThumbInstruction(MCInst &MI, uint64_t &Size, 905 ArrayRef<uint8_t> Bytes, 906 uint64_t Address, 907 raw_ostream &OS, 908 raw_ostream &CS) const { 909 CommentStream = &CS; 910 911 assert(STI.getFeatureBits()[ARM::ModeThumb] && 912 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!"); 913 914 // We want to read exactly 2 bytes of data. 915 if (Bytes.size() < 2) { 916 Size = 0; 917 return MCDisassembler::Fail; 918 } 919 920 uint16_t Insn16 = (Bytes[1] << 8) | Bytes[0]; 921 DecodeStatus Result = 922 decodeInstruction(DecoderTableThumb16, MI, Insn16, Address, this, STI); 923 if (Result != MCDisassembler::Fail) { 924 Size = 2; 925 Check(Result, AddThumbPredicate(MI)); 926 return Result; 927 } 928 929 Result = decodeInstruction(DecoderTableThumbSBit16, MI, Insn16, Address, this, 930 STI); 931 if (Result) { 932 Size = 2; 933 bool InITBlock = ITBlock.instrInITBlock(); 934 Check(Result, AddThumbPredicate(MI)); 935 AddThumb1SBit(MI, InITBlock); 936 return Result; 937 } 938 939 Result = 940 decodeInstruction(DecoderTableThumb216, MI, Insn16, Address, this, STI); 941 if (Result != MCDisassembler::Fail) { 942 Size = 2; 943 944 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add 945 // the Thumb predicate. 946 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock()) 947 Result = MCDisassembler::SoftFail; 948 949 Check(Result, AddThumbPredicate(MI)); 950 951 // If we find an IT instruction, we need to parse its condition 952 // code and mask operands so that we can apply them correctly 953 // to the subsequent instructions. 954 if (MI.getOpcode() == ARM::t2IT) { 955 unsigned Firstcond = MI.getOperand(0).getImm(); 956 unsigned Mask = MI.getOperand(1).getImm(); 957 ITBlock.setITState(Firstcond, Mask); 958 959 // An IT instruction that would give a 'NV' predicate is unpredictable. 960 if (Firstcond == ARMCC::AL && !isPowerOf2_32(Mask)) 961 CS << "unpredictable IT predicate sequence"; 962 } 963 964 return Result; 965 } 966 967 // We want to read exactly 4 bytes of data. 968 if (Bytes.size() < 4) { 969 Size = 0; 970 return MCDisassembler::Fail; 971 } 972 973 uint32_t Insn32 = 974 (Bytes[3] << 8) | (Bytes[2] << 0) | (Bytes[1] << 24) | (Bytes[0] << 16); 975 976 Result = 977 decodeInstruction(DecoderTableMVE32, MI, Insn32, Address, this, STI); 978 if (Result != MCDisassembler::Fail) { 979 Size = 4; 980 981 // Nested VPT blocks are UNPREDICTABLE. Must be checked before we add 982 // the VPT predicate. 983 if (isVPTOpcode(MI.getOpcode()) && VPTBlock.instrInVPTBlock()) 984 Result = MCDisassembler::SoftFail; 985 986 Check(Result, AddThumbPredicate(MI)); 987 988 if (isVPTOpcode(MI.getOpcode())) { 989 unsigned Mask = MI.getOperand(0).getImm(); 990 VPTBlock.setVPTState(Mask); 991 } 992 993 return Result; 994 } 995 996 Result = 997 decodeInstruction(DecoderTableThumb32, MI, Insn32, Address, this, STI); 998 if (Result != MCDisassembler::Fail) { 999 Size = 4; 1000 bool InITBlock = ITBlock.instrInITBlock(); 1001 Check(Result, AddThumbPredicate(MI)); 1002 AddThumb1SBit(MI, InITBlock); 1003 return Result; 1004 } 1005 1006 Result = 1007 decodeInstruction(DecoderTableThumb232, MI, Insn32, Address, this, STI); 1008 if (Result != MCDisassembler::Fail) { 1009 Size = 4; 1010 Check(Result, AddThumbPredicate(MI)); 1011 return checkDecodedInstruction(MI, Size, Address, OS, CS, Insn32, Result); 1012 } 1013 1014 if (fieldFromInstruction(Insn32, 28, 4) == 0xE) { 1015 Result = 1016 decodeInstruction(DecoderTableVFP32, MI, Insn32, Address, this, STI); 1017 if (Result != MCDisassembler::Fail) { 1018 Size = 4; 1019 UpdateThumbVFPPredicate(Result, MI); 1020 return Result; 1021 } 1022 } 1023 1024 Result = 1025 decodeInstruction(DecoderTableVFPV832, MI, Insn32, Address, this, STI); 1026 if (Result != MCDisassembler::Fail) { 1027 Size = 4; 1028 return Result; 1029 } 1030 1031 if (fieldFromInstruction(Insn32, 28, 4) == 0xE) { 1032 Result = decodeInstruction(DecoderTableNEONDup32, MI, Insn32, Address, this, 1033 STI); 1034 if (Result != MCDisassembler::Fail) { 1035 Size = 4; 1036 Check(Result, AddThumbPredicate(MI)); 1037 return Result; 1038 } 1039 } 1040 1041 if (fieldFromInstruction(Insn32, 24, 8) == 0xF9) { 1042 uint32_t NEONLdStInsn = Insn32; 1043 NEONLdStInsn &= 0xF0FFFFFF; 1044 NEONLdStInsn |= 0x04000000; 1045 Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn, 1046 Address, this, STI); 1047 if (Result != MCDisassembler::Fail) { 1048 Size = 4; 1049 Check(Result, AddThumbPredicate(MI)); 1050 return Result; 1051 } 1052 } 1053 1054 if (fieldFromInstruction(Insn32, 24, 4) == 0xF) { 1055 uint32_t NEONDataInsn = Insn32; 1056 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24 1057 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24 1058 NEONDataInsn |= 0x12000000; // Set bits 28 and 25 1059 Result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn, 1060 Address, this, STI); 1061 if (Result != MCDisassembler::Fail) { 1062 Size = 4; 1063 Check(Result, AddThumbPredicate(MI)); 1064 return Result; 1065 } 1066 1067 uint32_t NEONCryptoInsn = Insn32; 1068 NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24 1069 NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >> 4; // Move bit 28 to bit 24 1070 NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25 1071 Result = decodeInstruction(DecoderTablev8Crypto32, MI, NEONCryptoInsn, 1072 Address, this, STI); 1073 if (Result != MCDisassembler::Fail) { 1074 Size = 4; 1075 return Result; 1076 } 1077 1078 uint32_t NEONv8Insn = Insn32; 1079 NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26 1080 Result = decodeInstruction(DecoderTablev8NEON32, MI, NEONv8Insn, Address, 1081 this, STI); 1082 if (Result != MCDisassembler::Fail) { 1083 Size = 4; 1084 return Result; 1085 } 1086 } 1087 1088 Result = 1089 decodeInstruction(DecoderTableThumb2CoProc32, MI, Insn32, Address, this, STI); 1090 if (Result != MCDisassembler::Fail) { 1091 Size = 4; 1092 Check(Result, AddThumbPredicate(MI)); 1093 return Result; 1094 } 1095 1096 Size = 0; 1097 return MCDisassembler::Fail; 1098} 1099 1100extern "C" void LLVMInitializeARMDisassembler() { 1101 TargetRegistry::RegisterMCDisassembler(getTheARMLETarget(), 1102 createARMDisassembler); 1103 TargetRegistry::RegisterMCDisassembler(getTheARMBETarget(), 1104 createARMDisassembler); 1105 TargetRegistry::RegisterMCDisassembler(getTheThumbLETarget(), 1106 createARMDisassembler); 1107 TargetRegistry::RegisterMCDisassembler(getTheThumbBETarget(), 1108 createARMDisassembler); 1109} 1110 1111static const uint16_t GPRDecoderTable[] = { 1112 ARM::R0, ARM::R1, ARM::R2, ARM::R3, 1113 ARM::R4, ARM::R5, ARM::R6, ARM::R7, 1114 ARM::R8, ARM::R9, ARM::R10, ARM::R11, 1115 ARM::R12, ARM::SP, ARM::LR, ARM::PC 1116}; 1117 1118static const uint16_t CLRMGPRDecoderTable[] = { 1119 ARM::R0, ARM::R1, ARM::R2, ARM::R3, 1120 ARM::R4, ARM::R5, ARM::R6, ARM::R7, 1121 ARM::R8, ARM::R9, ARM::R10, ARM::R11, 1122 ARM::R12, 0, ARM::LR, ARM::APSR 1123}; 1124 1125static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo, 1126 uint64_t Address, const void *Decoder) { 1127 if (RegNo > 15) 1128 return MCDisassembler::Fail; 1129 1130 unsigned Register = GPRDecoderTable[RegNo]; 1131 Inst.addOperand(MCOperand::createReg(Register)); 1132 return MCDisassembler::Success; 1133} 1134 1135static DecodeStatus DecodeCLRMGPRRegisterClass(MCInst &Inst, unsigned RegNo, 1136 uint64_t Address, 1137 const void *Decoder) { 1138 if (RegNo > 15) 1139 return MCDisassembler::Fail; 1140 1141 unsigned Register = CLRMGPRDecoderTable[RegNo]; 1142 if (Register == 0) 1143 return MCDisassembler::Fail; 1144 1145 Inst.addOperand(MCOperand::createReg(Register)); 1146 return MCDisassembler::Success; 1147} 1148 1149static DecodeStatus 1150DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo, 1151 uint64_t Address, const void *Decoder) { 1152 DecodeStatus S = MCDisassembler::Success; 1153 1154 if (RegNo == 15) 1155 S = MCDisassembler::SoftFail; 1156 1157 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder)); 1158 1159 return S; 1160} 1161 1162static DecodeStatus 1163DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo, 1164 uint64_t Address, const void *Decoder) { 1165 DecodeStatus S = MCDisassembler::Success; 1166 1167 if (RegNo == 15) 1168 { 1169 Inst.addOperand(MCOperand::createReg(ARM::APSR_NZCV)); 1170 return MCDisassembler::Success; 1171 } 1172 1173 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder)); 1174 return S; 1175} 1176 1177static DecodeStatus 1178DecodeGPRwithZRRegisterClass(MCInst &Inst, unsigned RegNo, 1179 uint64_t Address, const void *Decoder) { 1180 DecodeStatus S = MCDisassembler::Success; 1181 1182 if (RegNo == 15) 1183 { 1184 Inst.addOperand(MCOperand::createReg(ARM::ZR)); 1185 return MCDisassembler::Success; 1186 } 1187 1188 if (RegNo == 13) 1189 Check(S, MCDisassembler::SoftFail); 1190 1191 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder)); 1192 return S; 1193} 1194 1195static DecodeStatus 1196DecodeGPRwithZRnospRegisterClass(MCInst &Inst, unsigned RegNo, 1197 uint64_t Address, const void *Decoder) { 1198 DecodeStatus S = MCDisassembler::Success; 1199 if (RegNo == 13) 1200 return MCDisassembler::Fail; 1201 Check(S, DecodeGPRwithZRRegisterClass(Inst, RegNo, Address, Decoder)); 1202 return S; 1203} 1204 1205static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo, 1206 uint64_t Address, const void *Decoder) { 1207 if (RegNo > 7) 1208 return MCDisassembler::Fail; 1209 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder); 1210} 1211 1212static const uint16_t GPRPairDecoderTable[] = { 1213 ARM::R0_R1, ARM::R2_R3, ARM::R4_R5, ARM::R6_R7, 1214 ARM::R8_R9, ARM::R10_R11, ARM::R12_SP 1215}; 1216 1217static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo, 1218 uint64_t Address, const void *Decoder) { 1219 DecodeStatus S = MCDisassembler::Success; 1220 1221 if (RegNo > 13) 1222 return MCDisassembler::Fail; 1223 1224 if ((RegNo & 1) || RegNo == 0xe) 1225 S = MCDisassembler::SoftFail; 1226 1227 unsigned RegisterPair = GPRPairDecoderTable[RegNo/2]; 1228 Inst.addOperand(MCOperand::createReg(RegisterPair)); 1229 return S; 1230} 1231 1232static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo, 1233 uint64_t Address, const void *Decoder) { 1234 unsigned Register = 0; 1235 switch (RegNo) { 1236 case 0: 1237 Register = ARM::R0; 1238 break; 1239 case 1: 1240 Register = ARM::R1; 1241 break; 1242 case 2: 1243 Register = ARM::R2; 1244 break; 1245 case 3: 1246 Register = ARM::R3; 1247 break; 1248 case 9: 1249 Register = ARM::R9; 1250 break; 1251 case 12: 1252 Register = ARM::R12; 1253 break; 1254 default: 1255 return MCDisassembler::Fail; 1256 } 1257 1258 Inst.addOperand(MCOperand::createReg(Register)); 1259 return MCDisassembler::Success; 1260} 1261 1262static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo, 1263 uint64_t Address, const void *Decoder) { 1264 DecodeStatus S = MCDisassembler::Success; 1265 1266 const FeatureBitset &featureBits = 1267 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits(); 1268 1269 if ((RegNo == 13 && !featureBits[ARM::HasV8Ops]) || RegNo == 15) 1270 S = MCDisassembler::SoftFail; 1271 1272 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder)); 1273 return S; 1274} 1275 1276static const uint16_t SPRDecoderTable[] = { 1277 ARM::S0, ARM::S1, ARM::S2, ARM::S3, 1278 ARM::S4, ARM::S5, ARM::S6, ARM::S7, 1279 ARM::S8, ARM::S9, ARM::S10, ARM::S11, 1280 ARM::S12, ARM::S13, ARM::S14, ARM::S15, 1281 ARM::S16, ARM::S17, ARM::S18, ARM::S19, 1282 ARM::S20, ARM::S21, ARM::S22, ARM::S23, 1283 ARM::S24, ARM::S25, ARM::S26, ARM::S27, 1284 ARM::S28, ARM::S29, ARM::S30, ARM::S31 1285}; 1286 1287static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo, 1288 uint64_t Address, const void *Decoder) { 1289 if (RegNo > 31) 1290 return MCDisassembler::Fail; 1291 1292 unsigned Register = SPRDecoderTable[RegNo]; 1293 Inst.addOperand(MCOperand::createReg(Register)); 1294 return MCDisassembler::Success; 1295} 1296 1297static DecodeStatus DecodeHPRRegisterClass(MCInst &Inst, unsigned RegNo, 1298 uint64_t Address, const void *Decoder) { 1299 return DecodeSPRRegisterClass(Inst, RegNo, Address, Decoder); 1300} 1301 1302static const uint16_t DPRDecoderTable[] = { 1303 ARM::D0, ARM::D1, ARM::D2, ARM::D3, 1304 ARM::D4, ARM::D5, ARM::D6, ARM::D7, 1305 ARM::D8, ARM::D9, ARM::D10, ARM::D11, 1306 ARM::D12, ARM::D13, ARM::D14, ARM::D15, 1307 ARM::D16, ARM::D17, ARM::D18, ARM::D19, 1308 ARM::D20, ARM::D21, ARM::D22, ARM::D23, 1309 ARM::D24, ARM::D25, ARM::D26, ARM::D27, 1310 ARM::D28, ARM::D29, ARM::D30, ARM::D31 1311}; 1312 1313static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo, 1314 uint64_t Address, const void *Decoder) { 1315 const FeatureBitset &featureBits = 1316 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits(); 1317 1318 bool hasD32 = featureBits[ARM::FeatureD32]; 1319 1320 if (RegNo > 31 || (!hasD32 && RegNo > 15)) 1321 return MCDisassembler::Fail; 1322 1323 unsigned Register = DPRDecoderTable[RegNo]; 1324 Inst.addOperand(MCOperand::createReg(Register)); 1325 return MCDisassembler::Success; 1326} 1327 1328static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo, 1329 uint64_t Address, const void *Decoder) { 1330 if (RegNo > 7) 1331 return MCDisassembler::Fail; 1332 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder); 1333} 1334 1335static DecodeStatus DecodeSPR_8RegisterClass(MCInst &Inst, unsigned RegNo, 1336 uint64_t Address, const void *Decoder) { 1337 if (RegNo > 15) 1338 return MCDisassembler::Fail; 1339 return DecodeSPRRegisterClass(Inst, RegNo, Address, Decoder); 1340} 1341 1342static DecodeStatus 1343DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo, 1344 uint64_t Address, const void *Decoder) { 1345 if (RegNo > 15) 1346 return MCDisassembler::Fail; 1347 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder); 1348} 1349 1350static const uint16_t QPRDecoderTable[] = { 1351 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3, 1352 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7, 1353 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11, 1354 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15 1355}; 1356 1357static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo, 1358 uint64_t Address, const void *Decoder) { 1359 if (RegNo > 31 || (RegNo & 1) != 0) 1360 return MCDisassembler::Fail; 1361 RegNo >>= 1; 1362 1363 unsigned Register = QPRDecoderTable[RegNo]; 1364 Inst.addOperand(MCOperand::createReg(Register)); 1365 return MCDisassembler::Success; 1366} 1367 1368static const uint16_t DPairDecoderTable[] = { 1369 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6, 1370 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12, 1371 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18, 1372 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24, 1373 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30, 1374 ARM::Q15 1375}; 1376 1377static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo, 1378 uint64_t Address, const void *Decoder) { 1379 if (RegNo > 30) 1380 return MCDisassembler::Fail; 1381 1382 unsigned Register = DPairDecoderTable[RegNo]; 1383 Inst.addOperand(MCOperand::createReg(Register)); 1384 return MCDisassembler::Success; 1385} 1386 1387static const uint16_t DPairSpacedDecoderTable[] = { 1388 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5, 1389 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9, 1390 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13, 1391 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17, 1392 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21, 1393 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25, 1394 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29, 1395 ARM::D28_D30, ARM::D29_D31 1396}; 1397 1398static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst, 1399 unsigned RegNo, 1400 uint64_t Address, 1401 const void *Decoder) { 1402 if (RegNo > 29) 1403 return MCDisassembler::Fail; 1404 1405 unsigned Register = DPairSpacedDecoderTable[RegNo]; 1406 Inst.addOperand(MCOperand::createReg(Register)); 1407 return MCDisassembler::Success; 1408} 1409 1410static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val, 1411 uint64_t Address, const void *Decoder) { 1412 DecodeStatus S = MCDisassembler::Success; 1413 if (Val == 0xF) return MCDisassembler::Fail; 1414 // AL predicate is not allowed on Thumb1 branches. 1415 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE) 1416 return MCDisassembler::Fail; 1417 if (Val != ARMCC::AL && !ARMInsts[Inst.getOpcode()].isPredicable()) 1418 Check(S, MCDisassembler::SoftFail); 1419 Inst.addOperand(MCOperand::createImm(Val)); 1420 if (Val == ARMCC::AL) { 1421 Inst.addOperand(MCOperand::createReg(0)); 1422 } else 1423 Inst.addOperand(MCOperand::createReg(ARM::CPSR)); 1424 return S; 1425} 1426 1427static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val, 1428 uint64_t Address, const void *Decoder) { 1429 if (Val) 1430 Inst.addOperand(MCOperand::createReg(ARM::CPSR)); 1431 else 1432 Inst.addOperand(MCOperand::createReg(0)); 1433 return MCDisassembler::Success; 1434} 1435 1436static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val, 1437 uint64_t Address, const void *Decoder) { 1438 DecodeStatus S = MCDisassembler::Success; 1439 1440 unsigned Rm = fieldFromInstruction(Val, 0, 4); 1441 unsigned type = fieldFromInstruction(Val, 5, 2); 1442 unsigned imm = fieldFromInstruction(Val, 7, 5); 1443 1444 // Register-immediate 1445 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))) 1446 return MCDisassembler::Fail; 1447 1448 ARM_AM::ShiftOpc Shift = ARM_AM::lsl; 1449 switch (type) { 1450 case 0: 1451 Shift = ARM_AM::lsl; 1452 break; 1453 case 1: 1454 Shift = ARM_AM::lsr; 1455 break; 1456 case 2: 1457 Shift = ARM_AM::asr; 1458 break; 1459 case 3: 1460 Shift = ARM_AM::ror; 1461 break; 1462 } 1463 1464 if (Shift == ARM_AM::ror && imm == 0) 1465 Shift = ARM_AM::rrx; 1466 1467 unsigned Op = Shift | (imm << 3); 1468 Inst.addOperand(MCOperand::createImm(Op)); 1469 1470 return S; 1471} 1472 1473static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val, 1474 uint64_t Address, const void *Decoder) { 1475 DecodeStatus S = MCDisassembler::Success; 1476 1477 unsigned Rm = fieldFromInstruction(Val, 0, 4); 1478 unsigned type = fieldFromInstruction(Val, 5, 2); 1479 unsigned Rs = fieldFromInstruction(Val, 8, 4); 1480 1481 // Register-register 1482 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder))) 1483 return MCDisassembler::Fail; 1484 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder))) 1485 return MCDisassembler::Fail; 1486 1487 ARM_AM::ShiftOpc Shift = ARM_AM::lsl; 1488 switch (type) { 1489 case 0: 1490 Shift = ARM_AM::lsl; 1491 break; 1492 case 1: 1493 Shift = ARM_AM::lsr; 1494 break; 1495 case 2: 1496 Shift = ARM_AM::asr; 1497 break; 1498 case 3: 1499 Shift = ARM_AM::ror; 1500 break; 1501 } 1502 1503 Inst.addOperand(MCOperand::createImm(Shift)); 1504 1505 return S; 1506} 1507 1508static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val, 1509 uint64_t Address, const void *Decoder) { 1510 DecodeStatus S = MCDisassembler::Success; 1511 1512 bool NeedDisjointWriteback = false; 1513 unsigned WritebackReg = 0; 1514 bool CLRM = false; 1515 switch (Inst.getOpcode()) { 1516 default: 1517 break; 1518 case ARM::LDMIA_UPD: 1519 case ARM::LDMDB_UPD: 1520 case ARM::LDMIB_UPD: 1521 case ARM::LDMDA_UPD: 1522 case ARM::t2LDMIA_UPD: 1523 case ARM::t2LDMDB_UPD: 1524 case ARM::t2STMIA_UPD: 1525 case ARM::t2STMDB_UPD: 1526 NeedDisjointWriteback = true; 1527 WritebackReg = Inst.getOperand(0).getReg(); 1528 break; 1529 case ARM::t2CLRM: 1530 CLRM = true; 1531 break; 1532 } 1533 1534 // Empty register lists are not allowed. 1535 if (Val == 0) return MCDisassembler::Fail; 1536 for (unsigned i = 0; i < 16; ++i) { 1537 if (Val & (1 << i)) { 1538 if (CLRM) { 1539 if (!Check(S, DecodeCLRMGPRRegisterClass(Inst, i, Address, Decoder))) { 1540 return MCDisassembler::Fail; 1541 } 1542 } else { 1543 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder))) 1544 return MCDisassembler::Fail; 1545 // Writeback not allowed if Rn is in the target list. 1546 if (NeedDisjointWriteback && WritebackReg == Inst.end()[-1].getReg()) 1547 Check(S, MCDisassembler::SoftFail); 1548 } 1549 } 1550 } 1551 1552 return S; 1553} 1554 1555static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val, 1556 uint64_t Address, const void *Decoder) { 1557 DecodeStatus S = MCDisassembler::Success; 1558 1559 unsigned Vd = fieldFromInstruction(Val, 8, 5); 1560 unsigned regs = fieldFromInstruction(Val, 0, 8); 1561 1562 // In case of unpredictable encoding, tweak the operands. 1563 if (regs == 0 || (Vd + regs) > 32) { 1564 regs = Vd + regs > 32 ? 32 - Vd : regs; 1565 regs = std::max( 1u, regs); 1566 S = MCDisassembler::SoftFail; 1567 } 1568 1569 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder))) 1570 return MCDisassembler::Fail; 1571 for (unsigned i = 0; i < (regs - 1); ++i) { 1572 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder))) 1573 return MCDisassembler::Fail; 1574 } 1575 1576 return S; 1577} 1578 1579static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val, 1580 uint64_t Address, const void *Decoder) { 1581 DecodeStatus S = MCDisassembler::Success; 1582 1583 unsigned Vd = fieldFromInstruction(Val, 8, 5); 1584 unsigned regs = fieldFromInstruction(Val, 1, 7); 1585 1586 // In case of unpredictable encoding, tweak the operands. 1587 if (regs == 0 || regs > 16 || (Vd + regs) > 32) { 1588 regs = Vd + regs > 32 ? 32 - Vd : regs; 1589 regs = std::max( 1u, regs); 1590 regs = std::min(16u, regs); 1591 S = MCDisassembler::SoftFail; 1592 } 1593 1594 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder))) 1595 return MCDisassembler::Fail; 1596 for (unsigned i = 0; i < (regs - 1); ++i) { 1597 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder))) 1598 return MCDisassembler::Fail; 1599 } 1600 1601 return S; 1602} 1603 1604static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val, 1605 uint64_t Address, const void *Decoder) { 1606 // This operand encodes a mask of contiguous zeros between a specified MSB 1607 // and LSB. To decode it, we create the mask of all bits MSB-and-lower, 1608 // the mask of all bits LSB-and-lower, and then xor them to create 1609 // the mask of that's all ones on [msb, lsb]. Finally we not it to 1610 // create the final mask. 1611 unsigned msb = fieldFromInstruction(Val, 5, 5); 1612 unsigned lsb = fieldFromInstruction(Val, 0, 5); 1613 1614 DecodeStatus S = MCDisassembler::Success; 1615 if (lsb > msb) { 1616 Check(S, MCDisassembler::SoftFail); 1617 // The check above will cause the warning for the "potentially undefined 1618 // instruction encoding" but we can't build a bad MCOperand value here 1619 // with a lsb > msb or else printing the MCInst will cause a crash. 1620 lsb = msb; 1621 } 1622 1623 uint32_t msb_mask = 0xFFFFFFFF; 1624 if (msb != 31) msb_mask = (1U << (msb+1)) - 1; 1625 uint32_t lsb_mask = (1U << lsb) - 1; 1626 1627 Inst.addOperand(MCOperand::createImm(~(msb_mask ^ lsb_mask))); 1628 return S; 1629} 1630 1631static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn, 1632 uint64_t Address, const void *Decoder) { 1633 DecodeStatus S = MCDisassembler::Success; 1634 1635 unsigned pred = fieldFromInstruction(Insn, 28, 4); 1636 unsigned CRd = fieldFromInstruction(Insn, 12, 4); 1637 unsigned coproc = fieldFromInstruction(Insn, 8, 4); 1638 unsigned imm = fieldFromInstruction(Insn, 0, 8); 1639 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 1640 unsigned U = fieldFromInstruction(Insn, 23, 1); 1641 const FeatureBitset &featureBits = 1642 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits(); 1643 1644 switch (Inst.getOpcode()) { 1645 case ARM::LDC_OFFSET: 1646 case ARM::LDC_PRE: 1647 case ARM::LDC_POST: 1648 case ARM::LDC_OPTION: 1649 case ARM::LDCL_OFFSET: 1650 case ARM::LDCL_PRE: 1651 case ARM::LDCL_POST: 1652 case ARM::LDCL_OPTION: 1653 case ARM::STC_OFFSET: 1654 case ARM::STC_PRE: 1655 case ARM::STC_POST: 1656 case ARM::STC_OPTION: 1657 case ARM::STCL_OFFSET: 1658 case ARM::STCL_PRE: 1659 case ARM::STCL_POST: 1660 case ARM::STCL_OPTION: 1661 case ARM::t2LDC_OFFSET: 1662 case ARM::t2LDC_PRE: 1663 case ARM::t2LDC_POST: 1664 case ARM::t2LDC_OPTION: 1665 case ARM::t2LDCL_OFFSET: 1666 case ARM::t2LDCL_PRE: 1667 case ARM::t2LDCL_POST: 1668 case ARM::t2LDCL_OPTION: 1669 case ARM::t2STC_OFFSET: 1670 case ARM::t2STC_PRE: 1671 case ARM::t2STC_POST: 1672 case ARM::t2STC_OPTION: 1673 case ARM::t2STCL_OFFSET: 1674 case ARM::t2STCL_PRE: 1675 case ARM::t2STCL_POST: 1676 case ARM::t2STCL_OPTION: 1677 case ARM::t2LDC2_OFFSET: 1678 case ARM::t2LDC2L_OFFSET: 1679 case ARM::t2LDC2_PRE: 1680 case ARM::t2LDC2L_PRE: 1681 case ARM::t2STC2_OFFSET: 1682 case ARM::t2STC2L_OFFSET: 1683 case ARM::t2STC2_PRE: 1684 case ARM::t2STC2L_PRE: 1685 case ARM::LDC2_OFFSET: 1686 case ARM::LDC2L_OFFSET: 1687 case ARM::LDC2_PRE: 1688 case ARM::LDC2L_PRE: 1689 case ARM::STC2_OFFSET: 1690 case ARM::STC2L_OFFSET: 1691 case ARM::STC2_PRE: 1692 case ARM::STC2L_PRE: 1693 case ARM::t2LDC2_OPTION: 1694 case ARM::t2STC2_OPTION: 1695 case ARM::t2LDC2_POST: 1696 case ARM::t2LDC2L_POST: 1697 case ARM::t2STC2_POST: 1698 case ARM::t2STC2L_POST: 1699 case ARM::LDC2_POST: 1700 case ARM::LDC2L_POST: 1701 case ARM::STC2_POST: 1702 case ARM::STC2L_POST: 1703 if (coproc == 0xA || coproc == 0xB || 1704 (featureBits[ARM::HasV8_1MMainlineOps] && 1705 (coproc == 0x8 || coproc == 0x9 || coproc == 0xA || coproc == 0xB || 1706 coproc == 0xE || coproc == 0xF))) 1707 return MCDisassembler::Fail; 1708 break; 1709 default: 1710 break; 1711 } 1712 1713 if (featureBits[ARM::HasV8Ops] && (coproc != 14)) 1714 return MCDisassembler::Fail; 1715 1716 Inst.addOperand(MCOperand::createImm(coproc)); 1717 Inst.addOperand(MCOperand::createImm(CRd)); 1718 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1719 return MCDisassembler::Fail; 1720 1721 switch (Inst.getOpcode()) { 1722 case ARM::t2LDC2_OFFSET: 1723 case ARM::t2LDC2L_OFFSET: 1724 case ARM::t2LDC2_PRE: 1725 case ARM::t2LDC2L_PRE: 1726 case ARM::t2STC2_OFFSET: 1727 case ARM::t2STC2L_OFFSET: 1728 case ARM::t2STC2_PRE: 1729 case ARM::t2STC2L_PRE: 1730 case ARM::LDC2_OFFSET: 1731 case ARM::LDC2L_OFFSET: 1732 case ARM::LDC2_PRE: 1733 case ARM::LDC2L_PRE: 1734 case ARM::STC2_OFFSET: 1735 case ARM::STC2L_OFFSET: 1736 case ARM::STC2_PRE: 1737 case ARM::STC2L_PRE: 1738 case ARM::t2LDC_OFFSET: 1739 case ARM::t2LDCL_OFFSET: 1740 case ARM::t2LDC_PRE: 1741 case ARM::t2LDCL_PRE: 1742 case ARM::t2STC_OFFSET: 1743 case ARM::t2STCL_OFFSET: 1744 case ARM::t2STC_PRE: 1745 case ARM::t2STCL_PRE: 1746 case ARM::LDC_OFFSET: 1747 case ARM::LDCL_OFFSET: 1748 case ARM::LDC_PRE: 1749 case ARM::LDCL_PRE: 1750 case ARM::STC_OFFSET: 1751 case ARM::STCL_OFFSET: 1752 case ARM::STC_PRE: 1753 case ARM::STCL_PRE: 1754 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm); 1755 Inst.addOperand(MCOperand::createImm(imm)); 1756 break; 1757 case ARM::t2LDC2_POST: 1758 case ARM::t2LDC2L_POST: 1759 case ARM::t2STC2_POST: 1760 case ARM::t2STC2L_POST: 1761 case ARM::LDC2_POST: 1762 case ARM::LDC2L_POST: 1763 case ARM::STC2_POST: 1764 case ARM::STC2L_POST: 1765 case ARM::t2LDC_POST: 1766 case ARM::t2LDCL_POST: 1767 case ARM::t2STC_POST: 1768 case ARM::t2STCL_POST: 1769 case ARM::LDC_POST: 1770 case ARM::LDCL_POST: 1771 case ARM::STC_POST: 1772 case ARM::STCL_POST: 1773 imm |= U << 8; 1774 LLVM_FALLTHROUGH; 1775 default: 1776 // The 'option' variant doesn't encode 'U' in the immediate since 1777 // the immediate is unsigned [0,255]. 1778 Inst.addOperand(MCOperand::createImm(imm)); 1779 break; 1780 } 1781 1782 switch (Inst.getOpcode()) { 1783 case ARM::LDC_OFFSET: 1784 case ARM::LDC_PRE: 1785 case ARM::LDC_POST: 1786 case ARM::LDC_OPTION: 1787 case ARM::LDCL_OFFSET: 1788 case ARM::LDCL_PRE: 1789 case ARM::LDCL_POST: 1790 case ARM::LDCL_OPTION: 1791 case ARM::STC_OFFSET: 1792 case ARM::STC_PRE: 1793 case ARM::STC_POST: 1794 case ARM::STC_OPTION: 1795 case ARM::STCL_OFFSET: 1796 case ARM::STCL_PRE: 1797 case ARM::STCL_POST: 1798 case ARM::STCL_OPTION: 1799 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 1800 return MCDisassembler::Fail; 1801 break; 1802 default: 1803 break; 1804 } 1805 1806 return S; 1807} 1808 1809static DecodeStatus 1810DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn, 1811 uint64_t Address, const void *Decoder) { 1812 DecodeStatus S = MCDisassembler::Success; 1813 1814 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 1815 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 1816 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 1817 unsigned imm = fieldFromInstruction(Insn, 0, 12); 1818 unsigned pred = fieldFromInstruction(Insn, 28, 4); 1819 unsigned reg = fieldFromInstruction(Insn, 25, 1); 1820 unsigned P = fieldFromInstruction(Insn, 24, 1); 1821 unsigned W = fieldFromInstruction(Insn, 21, 1); 1822 1823 // On stores, the writeback operand precedes Rt. 1824 switch (Inst.getOpcode()) { 1825 case ARM::STR_POST_IMM: 1826 case ARM::STR_POST_REG: 1827 case ARM::STRB_POST_IMM: 1828 case ARM::STRB_POST_REG: 1829 case ARM::STRT_POST_REG: 1830 case ARM::STRT_POST_IMM: 1831 case ARM::STRBT_POST_REG: 1832 case ARM::STRBT_POST_IMM: 1833 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1834 return MCDisassembler::Fail; 1835 break; 1836 default: 1837 break; 1838 } 1839 1840 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 1841 return MCDisassembler::Fail; 1842 1843 // On loads, the writeback operand comes after Rt. 1844 switch (Inst.getOpcode()) { 1845 case ARM::LDR_POST_IMM: 1846 case ARM::LDR_POST_REG: 1847 case ARM::LDRB_POST_IMM: 1848 case ARM::LDRB_POST_REG: 1849 case ARM::LDRBT_POST_REG: 1850 case ARM::LDRBT_POST_IMM: 1851 case ARM::LDRT_POST_REG: 1852 case ARM::LDRT_POST_IMM: 1853 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1854 return MCDisassembler::Fail; 1855 break; 1856 default: 1857 break; 1858 } 1859 1860 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1861 return MCDisassembler::Fail; 1862 1863 ARM_AM::AddrOpc Op = ARM_AM::add; 1864 if (!fieldFromInstruction(Insn, 23, 1)) 1865 Op = ARM_AM::sub; 1866 1867 bool writeback = (P == 0) || (W == 1); 1868 unsigned idx_mode = 0; 1869 if (P && writeback) 1870 idx_mode = ARMII::IndexModePre; 1871 else if (!P && writeback) 1872 idx_mode = ARMII::IndexModePost; 1873 1874 if (writeback && (Rn == 15 || Rn == Rt)) 1875 S = MCDisassembler::SoftFail; // UNPREDICTABLE 1876 1877 if (reg) { 1878 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder))) 1879 return MCDisassembler::Fail; 1880 ARM_AM::ShiftOpc Opc = ARM_AM::lsl; 1881 switch( fieldFromInstruction(Insn, 5, 2)) { 1882 case 0: 1883 Opc = ARM_AM::lsl; 1884 break; 1885 case 1: 1886 Opc = ARM_AM::lsr; 1887 break; 1888 case 2: 1889 Opc = ARM_AM::asr; 1890 break; 1891 case 3: 1892 Opc = ARM_AM::ror; 1893 break; 1894 default: 1895 return MCDisassembler::Fail; 1896 } 1897 unsigned amt = fieldFromInstruction(Insn, 7, 5); 1898 if (Opc == ARM_AM::ror && amt == 0) 1899 Opc = ARM_AM::rrx; 1900 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode); 1901 1902 Inst.addOperand(MCOperand::createImm(imm)); 1903 } else { 1904 Inst.addOperand(MCOperand::createReg(0)); 1905 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode); 1906 Inst.addOperand(MCOperand::createImm(tmp)); 1907 } 1908 1909 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 1910 return MCDisassembler::Fail; 1911 1912 return S; 1913} 1914 1915static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val, 1916 uint64_t Address, const void *Decoder) { 1917 DecodeStatus S = MCDisassembler::Success; 1918 1919 unsigned Rn = fieldFromInstruction(Val, 13, 4); 1920 unsigned Rm = fieldFromInstruction(Val, 0, 4); 1921 unsigned type = fieldFromInstruction(Val, 5, 2); 1922 unsigned imm = fieldFromInstruction(Val, 7, 5); 1923 unsigned U = fieldFromInstruction(Val, 12, 1); 1924 1925 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl; 1926 switch (type) { 1927 case 0: 1928 ShOp = ARM_AM::lsl; 1929 break; 1930 case 1: 1931 ShOp = ARM_AM::lsr; 1932 break; 1933 case 2: 1934 ShOp = ARM_AM::asr; 1935 break; 1936 case 3: 1937 ShOp = ARM_AM::ror; 1938 break; 1939 } 1940 1941 if (ShOp == ARM_AM::ror && imm == 0) 1942 ShOp = ARM_AM::rrx; 1943 1944 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1945 return MCDisassembler::Fail; 1946 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 1947 return MCDisassembler::Fail; 1948 unsigned shift; 1949 if (U) 1950 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp); 1951 else 1952 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp); 1953 Inst.addOperand(MCOperand::createImm(shift)); 1954 1955 return S; 1956} 1957 1958static DecodeStatus 1959DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn, 1960 uint64_t Address, const void *Decoder) { 1961 DecodeStatus S = MCDisassembler::Success; 1962 1963 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 1964 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 1965 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 1966 unsigned type = fieldFromInstruction(Insn, 22, 1); 1967 unsigned imm = fieldFromInstruction(Insn, 8, 4); 1968 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8; 1969 unsigned pred = fieldFromInstruction(Insn, 28, 4); 1970 unsigned W = fieldFromInstruction(Insn, 21, 1); 1971 unsigned P = fieldFromInstruction(Insn, 24, 1); 1972 unsigned Rt2 = Rt + 1; 1973 1974 bool writeback = (W == 1) | (P == 0); 1975 1976 // For {LD,ST}RD, Rt must be even, else undefined. 1977 switch (Inst.getOpcode()) { 1978 case ARM::STRD: 1979 case ARM::STRD_PRE: 1980 case ARM::STRD_POST: 1981 case ARM::LDRD: 1982 case ARM::LDRD_PRE: 1983 case ARM::LDRD_POST: 1984 if (Rt & 0x1) S = MCDisassembler::SoftFail; 1985 break; 1986 default: 1987 break; 1988 } 1989 switch (Inst.getOpcode()) { 1990 case ARM::STRD: 1991 case ARM::STRD_PRE: 1992 case ARM::STRD_POST: 1993 if (P == 0 && W == 1) 1994 S = MCDisassembler::SoftFail; 1995 1996 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2)) 1997 S = MCDisassembler::SoftFail; 1998 if (type && Rm == 15) 1999 S = MCDisassembler::SoftFail; 2000 if (Rt2 == 15) 2001 S = MCDisassembler::SoftFail; 2002 if (!type && fieldFromInstruction(Insn, 8, 4)) 2003 S = MCDisassembler::SoftFail; 2004 break; 2005 case ARM::STRH: 2006 case ARM::STRH_PRE: 2007 case ARM::STRH_POST: 2008 if (Rt == 15) 2009 S = MCDisassembler::SoftFail; 2010 if (writeback && (Rn == 15 || Rn == Rt)) 2011 S = MCDisassembler::SoftFail; 2012 if (!type && Rm == 15) 2013 S = MCDisassembler::SoftFail; 2014 break; 2015 case ARM::LDRD: 2016 case ARM::LDRD_PRE: 2017 case ARM::LDRD_POST: 2018 if (type && Rn == 15) { 2019 if (Rt2 == 15) 2020 S = MCDisassembler::SoftFail; 2021 break; 2022 } 2023 if (P == 0 && W == 1) 2024 S = MCDisassembler::SoftFail; 2025 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2)) 2026 S = MCDisassembler::SoftFail; 2027 if (!type && writeback && Rn == 15) 2028 S = MCDisassembler::SoftFail; 2029 if (writeback && (Rn == Rt || Rn == Rt2)) 2030 S = MCDisassembler::SoftFail; 2031 break; 2032 case ARM::LDRH: 2033 case ARM::LDRH_PRE: 2034 case ARM::LDRH_POST: 2035 if (type && Rn == 15) { 2036 if (Rt == 15) 2037 S = MCDisassembler::SoftFail; 2038 break; 2039 } 2040 if (Rt == 15) 2041 S = MCDisassembler::SoftFail; 2042 if (!type && Rm == 15) 2043 S = MCDisassembler::SoftFail; 2044 if (!type && writeback && (Rn == 15 || Rn == Rt)) 2045 S = MCDisassembler::SoftFail; 2046 break; 2047 case ARM::LDRSH: 2048 case ARM::LDRSH_PRE: 2049 case ARM::LDRSH_POST: 2050 case ARM::LDRSB: 2051 case ARM::LDRSB_PRE: 2052 case ARM::LDRSB_POST: 2053 if (type && Rn == 15) { 2054 if (Rt == 15) 2055 S = MCDisassembler::SoftFail; 2056 break; 2057 } 2058 if (type && (Rt == 15 || (writeback && Rn == Rt))) 2059 S = MCDisassembler::SoftFail; 2060 if (!type && (Rt == 15 || Rm == 15)) 2061 S = MCDisassembler::SoftFail; 2062 if (!type && writeback && (Rn == 15 || Rn == Rt)) 2063 S = MCDisassembler::SoftFail; 2064 break; 2065 default: 2066 break; 2067 } 2068 2069 if (writeback) { // Writeback 2070 if (P) 2071 U |= ARMII::IndexModePre << 9; 2072 else 2073 U |= ARMII::IndexModePost << 9; 2074 2075 // On stores, the writeback operand precedes Rt. 2076 switch (Inst.getOpcode()) { 2077 case ARM::STRD: 2078 case ARM::STRD_PRE: 2079 case ARM::STRD_POST: 2080 case ARM::STRH: 2081 case ARM::STRH_PRE: 2082 case ARM::STRH_POST: 2083 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2084 return MCDisassembler::Fail; 2085 break; 2086 default: 2087 break; 2088 } 2089 } 2090 2091 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 2092 return MCDisassembler::Fail; 2093 switch (Inst.getOpcode()) { 2094 case ARM::STRD: 2095 case ARM::STRD_PRE: 2096 case ARM::STRD_POST: 2097 case ARM::LDRD: 2098 case ARM::LDRD_PRE: 2099 case ARM::LDRD_POST: 2100 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder))) 2101 return MCDisassembler::Fail; 2102 break; 2103 default: 2104 break; 2105 } 2106 2107 if (writeback) { 2108 // On loads, the writeback operand comes after Rt. 2109 switch (Inst.getOpcode()) { 2110 case ARM::LDRD: 2111 case ARM::LDRD_PRE: 2112 case ARM::LDRD_POST: 2113 case ARM::LDRH: 2114 case ARM::LDRH_PRE: 2115 case ARM::LDRH_POST: 2116 case ARM::LDRSH: 2117 case ARM::LDRSH_PRE: 2118 case ARM::LDRSH_POST: 2119 case ARM::LDRSB: 2120 case ARM::LDRSB_PRE: 2121 case ARM::LDRSB_POST: 2122 case ARM::LDRHTr: 2123 case ARM::LDRSBTr: 2124 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2125 return MCDisassembler::Fail; 2126 break; 2127 default: 2128 break; 2129 } 2130 } 2131 2132 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2133 return MCDisassembler::Fail; 2134 2135 if (type) { 2136 Inst.addOperand(MCOperand::createReg(0)); 2137 Inst.addOperand(MCOperand::createImm(U | (imm << 4) | Rm)); 2138 } else { 2139 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2140 return MCDisassembler::Fail; 2141 Inst.addOperand(MCOperand::createImm(U)); 2142 } 2143 2144 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 2145 return MCDisassembler::Fail; 2146 2147 return S; 2148} 2149 2150static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn, 2151 uint64_t Address, const void *Decoder) { 2152 DecodeStatus S = MCDisassembler::Success; 2153 2154 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 2155 unsigned mode = fieldFromInstruction(Insn, 23, 2); 2156 2157 switch (mode) { 2158 case 0: 2159 mode = ARM_AM::da; 2160 break; 2161 case 1: 2162 mode = ARM_AM::ia; 2163 break; 2164 case 2: 2165 mode = ARM_AM::db; 2166 break; 2167 case 3: 2168 mode = ARM_AM::ib; 2169 break; 2170 } 2171 2172 Inst.addOperand(MCOperand::createImm(mode)); 2173 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2174 return MCDisassembler::Fail; 2175 2176 return S; 2177} 2178 2179static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn, 2180 uint64_t Address, const void *Decoder) { 2181 DecodeStatus S = MCDisassembler::Success; 2182 2183 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 2184 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 2185 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 2186 unsigned pred = fieldFromInstruction(Insn, 28, 4); 2187 2188 if (pred == 0xF) 2189 return DecodeCPSInstruction(Inst, Insn, Address, Decoder); 2190 2191 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder))) 2192 return MCDisassembler::Fail; 2193 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder))) 2194 return MCDisassembler::Fail; 2195 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 2196 return MCDisassembler::Fail; 2197 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 2198 return MCDisassembler::Fail; 2199 return S; 2200} 2201 2202static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst, 2203 unsigned Insn, 2204 uint64_t Address, const void *Decoder) { 2205 DecodeStatus S = MCDisassembler::Success; 2206 2207 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 2208 unsigned pred = fieldFromInstruction(Insn, 28, 4); 2209 unsigned reglist = fieldFromInstruction(Insn, 0, 16); 2210 2211 if (pred == 0xF) { 2212 // Ambiguous with RFE and SRS 2213 switch (Inst.getOpcode()) { 2214 case ARM::LDMDA: 2215 Inst.setOpcode(ARM::RFEDA); 2216 break; 2217 case ARM::LDMDA_UPD: 2218 Inst.setOpcode(ARM::RFEDA_UPD); 2219 break; 2220 case ARM::LDMDB: 2221 Inst.setOpcode(ARM::RFEDB); 2222 break; 2223 case ARM::LDMDB_UPD: 2224 Inst.setOpcode(ARM::RFEDB_UPD); 2225 break; 2226 case ARM::LDMIA: 2227 Inst.setOpcode(ARM::RFEIA); 2228 break; 2229 case ARM::LDMIA_UPD: 2230 Inst.setOpcode(ARM::RFEIA_UPD); 2231 break; 2232 case ARM::LDMIB: 2233 Inst.setOpcode(ARM::RFEIB); 2234 break; 2235 case ARM::LDMIB_UPD: 2236 Inst.setOpcode(ARM::RFEIB_UPD); 2237 break; 2238 case ARM::STMDA: 2239 Inst.setOpcode(ARM::SRSDA); 2240 break; 2241 case ARM::STMDA_UPD: 2242 Inst.setOpcode(ARM::SRSDA_UPD); 2243 break; 2244 case ARM::STMDB: 2245 Inst.setOpcode(ARM::SRSDB); 2246 break; 2247 case ARM::STMDB_UPD: 2248 Inst.setOpcode(ARM::SRSDB_UPD); 2249 break; 2250 case ARM::STMIA: 2251 Inst.setOpcode(ARM::SRSIA); 2252 break; 2253 case ARM::STMIA_UPD: 2254 Inst.setOpcode(ARM::SRSIA_UPD); 2255 break; 2256 case ARM::STMIB: 2257 Inst.setOpcode(ARM::SRSIB); 2258 break; 2259 case ARM::STMIB_UPD: 2260 Inst.setOpcode(ARM::SRSIB_UPD); 2261 break; 2262 default: 2263 return MCDisassembler::Fail; 2264 } 2265 2266 // For stores (which become SRS's, the only operand is the mode. 2267 if (fieldFromInstruction(Insn, 20, 1) == 0) { 2268 // Check SRS encoding constraints 2269 if (!(fieldFromInstruction(Insn, 22, 1) == 1 && 2270 fieldFromInstruction(Insn, 20, 1) == 0)) 2271 return MCDisassembler::Fail; 2272 2273 Inst.addOperand( 2274 MCOperand::createImm(fieldFromInstruction(Insn, 0, 4))); 2275 return S; 2276 } 2277 2278 return DecodeRFEInstruction(Inst, Insn, Address, Decoder); 2279 } 2280 2281 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2282 return MCDisassembler::Fail; 2283 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2284 return MCDisassembler::Fail; // Tied 2285 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 2286 return MCDisassembler::Fail; 2287 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder))) 2288 return MCDisassembler::Fail; 2289 2290 return S; 2291} 2292 2293// Check for UNPREDICTABLE predicated ESB instruction 2294static DecodeStatus DecodeHINTInstruction(MCInst &Inst, unsigned Insn, 2295 uint64_t Address, const void *Decoder) { 2296 unsigned pred = fieldFromInstruction(Insn, 28, 4); 2297 unsigned imm8 = fieldFromInstruction(Insn, 0, 8); 2298 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder); 2299 const FeatureBitset &FeatureBits = Dis->getSubtargetInfo().getFeatureBits(); 2300 2301 DecodeStatus S = MCDisassembler::Success; 2302 2303 Inst.addOperand(MCOperand::createImm(imm8)); 2304 2305 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 2306 return MCDisassembler::Fail; 2307 2308 // ESB is unpredictable if pred != AL. Without the RAS extension, it is a NOP, 2309 // so all predicates should be allowed. 2310 if (imm8 == 0x10 && pred != 0xe && ((FeatureBits[ARM::FeatureRAS]) != 0)) 2311 S = MCDisassembler::SoftFail; 2312 2313 return S; 2314} 2315 2316static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn, 2317 uint64_t Address, const void *Decoder) { 2318 unsigned imod = fieldFromInstruction(Insn, 18, 2); 2319 unsigned M = fieldFromInstruction(Insn, 17, 1); 2320 unsigned iflags = fieldFromInstruction(Insn, 6, 3); 2321 unsigned mode = fieldFromInstruction(Insn, 0, 5); 2322 2323 DecodeStatus S = MCDisassembler::Success; 2324 2325 // This decoder is called from multiple location that do not check 2326 // the full encoding is valid before they do. 2327 if (fieldFromInstruction(Insn, 5, 1) != 0 || 2328 fieldFromInstruction(Insn, 16, 1) != 0 || 2329 fieldFromInstruction(Insn, 20, 8) != 0x10) 2330 return MCDisassembler::Fail; 2331 2332 // imod == '01' --> UNPREDICTABLE 2333 // NOTE: Even though this is technically UNPREDICTABLE, we choose to 2334 // return failure here. The '01' imod value is unprintable, so there's 2335 // nothing useful we could do even if we returned UNPREDICTABLE. 2336 2337 if (imod == 1) return MCDisassembler::Fail; 2338 2339 if (imod && M) { 2340 Inst.setOpcode(ARM::CPS3p); 2341 Inst.addOperand(MCOperand::createImm(imod)); 2342 Inst.addOperand(MCOperand::createImm(iflags)); 2343 Inst.addOperand(MCOperand::createImm(mode)); 2344 } else if (imod && !M) { 2345 Inst.setOpcode(ARM::CPS2p); 2346 Inst.addOperand(MCOperand::createImm(imod)); 2347 Inst.addOperand(MCOperand::createImm(iflags)); 2348 if (mode) S = MCDisassembler::SoftFail; 2349 } else if (!imod && M) { 2350 Inst.setOpcode(ARM::CPS1p); 2351 Inst.addOperand(MCOperand::createImm(mode)); 2352 if (iflags) S = MCDisassembler::SoftFail; 2353 } else { 2354 // imod == '00' && M == '0' --> UNPREDICTABLE 2355 Inst.setOpcode(ARM::CPS1p); 2356 Inst.addOperand(MCOperand::createImm(mode)); 2357 S = MCDisassembler::SoftFail; 2358 } 2359 2360 return S; 2361} 2362 2363static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn, 2364 uint64_t Address, const void *Decoder) { 2365 unsigned imod = fieldFromInstruction(Insn, 9, 2); 2366 unsigned M = fieldFromInstruction(Insn, 8, 1); 2367 unsigned iflags = fieldFromInstruction(Insn, 5, 3); 2368 unsigned mode = fieldFromInstruction(Insn, 0, 5); 2369 2370 DecodeStatus S = MCDisassembler::Success; 2371 2372 // imod == '01' --> UNPREDICTABLE 2373 // NOTE: Even though this is technically UNPREDICTABLE, we choose to 2374 // return failure here. The '01' imod value is unprintable, so there's 2375 // nothing useful we could do even if we returned UNPREDICTABLE. 2376 2377 if (imod == 1) return MCDisassembler::Fail; 2378 2379 if (imod && M) { 2380 Inst.setOpcode(ARM::t2CPS3p); 2381 Inst.addOperand(MCOperand::createImm(imod)); 2382 Inst.addOperand(MCOperand::createImm(iflags)); 2383 Inst.addOperand(MCOperand::createImm(mode)); 2384 } else if (imod && !M) { 2385 Inst.setOpcode(ARM::t2CPS2p); 2386 Inst.addOperand(MCOperand::createImm(imod)); 2387 Inst.addOperand(MCOperand::createImm(iflags)); 2388 if (mode) S = MCDisassembler::SoftFail; 2389 } else if (!imod && M) { 2390 Inst.setOpcode(ARM::t2CPS1p); 2391 Inst.addOperand(MCOperand::createImm(mode)); 2392 if (iflags) S = MCDisassembler::SoftFail; 2393 } else { 2394 // imod == '00' && M == '0' --> this is a HINT instruction 2395 int imm = fieldFromInstruction(Insn, 0, 8); 2396 // HINT are defined only for immediate in [0..4] 2397 if(imm > 4) return MCDisassembler::Fail; 2398 Inst.setOpcode(ARM::t2HINT); 2399 Inst.addOperand(MCOperand::createImm(imm)); 2400 } 2401 2402 return S; 2403} 2404 2405static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn, 2406 uint64_t Address, const void *Decoder) { 2407 DecodeStatus S = MCDisassembler::Success; 2408 2409 unsigned Rd = fieldFromInstruction(Insn, 8, 4); 2410 unsigned imm = 0; 2411 2412 imm |= (fieldFromInstruction(Insn, 0, 8) << 0); 2413 imm |= (fieldFromInstruction(Insn, 12, 3) << 8); 2414 imm |= (fieldFromInstruction(Insn, 16, 4) << 12); 2415 imm |= (fieldFromInstruction(Insn, 26, 1) << 11); 2416 2417 if (Inst.getOpcode() == ARM::t2MOVTi16) 2418 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder))) 2419 return MCDisassembler::Fail; 2420 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder))) 2421 return MCDisassembler::Fail; 2422 2423 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder)) 2424 Inst.addOperand(MCOperand::createImm(imm)); 2425 2426 return S; 2427} 2428 2429static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn, 2430 uint64_t Address, const void *Decoder) { 2431 DecodeStatus S = MCDisassembler::Success; 2432 2433 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 2434 unsigned pred = fieldFromInstruction(Insn, 28, 4); 2435 unsigned imm = 0; 2436 2437 imm |= (fieldFromInstruction(Insn, 0, 12) << 0); 2438 imm |= (fieldFromInstruction(Insn, 16, 4) << 12); 2439 2440 if (Inst.getOpcode() == ARM::MOVTi16) 2441 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder))) 2442 return MCDisassembler::Fail; 2443 2444 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder))) 2445 return MCDisassembler::Fail; 2446 2447 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder)) 2448 Inst.addOperand(MCOperand::createImm(imm)); 2449 2450 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 2451 return MCDisassembler::Fail; 2452 2453 return S; 2454} 2455 2456static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn, 2457 uint64_t Address, const void *Decoder) { 2458 DecodeStatus S = MCDisassembler::Success; 2459 2460 unsigned Rd = fieldFromInstruction(Insn, 16, 4); 2461 unsigned Rn = fieldFromInstruction(Insn, 0, 4); 2462 unsigned Rm = fieldFromInstruction(Insn, 8, 4); 2463 unsigned Ra = fieldFromInstruction(Insn, 12, 4); 2464 unsigned pred = fieldFromInstruction(Insn, 28, 4); 2465 2466 if (pred == 0xF) 2467 return DecodeCPSInstruction(Inst, Insn, Address, Decoder); 2468 2469 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder))) 2470 return MCDisassembler::Fail; 2471 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 2472 return MCDisassembler::Fail; 2473 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder))) 2474 return MCDisassembler::Fail; 2475 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder))) 2476 return MCDisassembler::Fail; 2477 2478 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 2479 return MCDisassembler::Fail; 2480 2481 return S; 2482} 2483 2484static DecodeStatus DecodeTSTInstruction(MCInst &Inst, unsigned Insn, 2485 uint64_t Address, const void *Decoder) { 2486 DecodeStatus S = MCDisassembler::Success; 2487 2488 unsigned Pred = fieldFromInstruction(Insn, 28, 4); 2489 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 2490 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 2491 2492 if (Pred == 0xF) 2493 return DecodeSETPANInstruction(Inst, Insn, Address, Decoder); 2494 2495 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2496 return MCDisassembler::Fail; 2497 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2498 return MCDisassembler::Fail; 2499 if (!Check(S, DecodePredicateOperand(Inst, Pred, Address, Decoder))) 2500 return MCDisassembler::Fail; 2501 2502 return S; 2503} 2504 2505static DecodeStatus DecodeSETPANInstruction(MCInst &Inst, unsigned Insn, 2506 uint64_t Address, const void *Decoder) { 2507 DecodeStatus S = MCDisassembler::Success; 2508 2509 unsigned Imm = fieldFromInstruction(Insn, 9, 1); 2510 2511 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder); 2512 const FeatureBitset &FeatureBits = Dis->getSubtargetInfo().getFeatureBits(); 2513 2514 if (!FeatureBits[ARM::HasV8_1aOps] || 2515 !FeatureBits[ARM::HasV8Ops]) 2516 return MCDisassembler::Fail; 2517 2518 // Decoder can be called from DecodeTST, which does not check the full 2519 // encoding is valid. 2520 if (fieldFromInstruction(Insn, 20,12) != 0xf11 || 2521 fieldFromInstruction(Insn, 4,4) != 0) 2522 return MCDisassembler::Fail; 2523 if (fieldFromInstruction(Insn, 10,10) != 0 || 2524 fieldFromInstruction(Insn, 0,4) != 0) 2525 S = MCDisassembler::SoftFail; 2526 2527 Inst.setOpcode(ARM::SETPAN); 2528 Inst.addOperand(MCOperand::createImm(Imm)); 2529 2530 return S; 2531} 2532 2533static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val, 2534 uint64_t Address, const void *Decoder) { 2535 DecodeStatus S = MCDisassembler::Success; 2536 2537 unsigned add = fieldFromInstruction(Val, 12, 1); 2538 unsigned imm = fieldFromInstruction(Val, 0, 12); 2539 unsigned Rn = fieldFromInstruction(Val, 13, 4); 2540 2541 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2542 return MCDisassembler::Fail; 2543 2544 if (!add) imm *= -1; 2545 if (imm == 0 && !add) imm = INT32_MIN; 2546 Inst.addOperand(MCOperand::createImm(imm)); 2547 if (Rn == 15) 2548 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder); 2549 2550 return S; 2551} 2552 2553static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val, 2554 uint64_t Address, const void *Decoder) { 2555 DecodeStatus S = MCDisassembler::Success; 2556 2557 unsigned Rn = fieldFromInstruction(Val, 9, 4); 2558 // U == 1 to add imm, 0 to subtract it. 2559 unsigned U = fieldFromInstruction(Val, 8, 1); 2560 unsigned imm = fieldFromInstruction(Val, 0, 8); 2561 2562 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2563 return MCDisassembler::Fail; 2564 2565 if (U) 2566 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5Opc(ARM_AM::add, imm))); 2567 else 2568 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm))); 2569 2570 return S; 2571} 2572 2573static DecodeStatus DecodeAddrMode5FP16Operand(MCInst &Inst, unsigned Val, 2574 uint64_t Address, const void *Decoder) { 2575 DecodeStatus S = MCDisassembler::Success; 2576 2577 unsigned Rn = fieldFromInstruction(Val, 9, 4); 2578 // U == 1 to add imm, 0 to subtract it. 2579 unsigned U = fieldFromInstruction(Val, 8, 1); 2580 unsigned imm = fieldFromInstruction(Val, 0, 8); 2581 2582 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2583 return MCDisassembler::Fail; 2584 2585 if (U) 2586 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5FP16Opc(ARM_AM::add, imm))); 2587 else 2588 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5FP16Opc(ARM_AM::sub, imm))); 2589 2590 return S; 2591} 2592 2593static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val, 2594 uint64_t Address, const void *Decoder) { 2595 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder); 2596} 2597 2598static DecodeStatus 2599DecodeT2BInstruction(MCInst &Inst, unsigned Insn, 2600 uint64_t Address, const void *Decoder) { 2601 DecodeStatus Status = MCDisassembler::Success; 2602 2603 // Note the J1 and J2 values are from the encoded instruction. So here 2604 // change them to I1 and I2 values via as documented: 2605 // I1 = NOT(J1 EOR S); 2606 // I2 = NOT(J2 EOR S); 2607 // and build the imm32 with one trailing zero as documented: 2608 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32); 2609 unsigned S = fieldFromInstruction(Insn, 26, 1); 2610 unsigned J1 = fieldFromInstruction(Insn, 13, 1); 2611 unsigned J2 = fieldFromInstruction(Insn, 11, 1); 2612 unsigned I1 = !(J1 ^ S); 2613 unsigned I2 = !(J2 ^ S); 2614 unsigned imm10 = fieldFromInstruction(Insn, 16, 10); 2615 unsigned imm11 = fieldFromInstruction(Insn, 0, 11); 2616 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11; 2617 int imm32 = SignExtend32<25>(tmp << 1); 2618 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4, 2619 true, 4, Inst, Decoder)) 2620 Inst.addOperand(MCOperand::createImm(imm32)); 2621 2622 return Status; 2623} 2624 2625static DecodeStatus 2626DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn, 2627 uint64_t Address, const void *Decoder) { 2628 DecodeStatus S = MCDisassembler::Success; 2629 2630 unsigned pred = fieldFromInstruction(Insn, 28, 4); 2631 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2; 2632 2633 if (pred == 0xF) { 2634 Inst.setOpcode(ARM::BLXi); 2635 imm |= fieldFromInstruction(Insn, 24, 1) << 1; 2636 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8, 2637 true, 4, Inst, Decoder)) 2638 Inst.addOperand(MCOperand::createImm(SignExtend32<26>(imm))); 2639 return S; 2640 } 2641 2642 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8, 2643 true, 4, Inst, Decoder)) 2644 Inst.addOperand(MCOperand::createImm(SignExtend32<26>(imm))); 2645 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 2646 return MCDisassembler::Fail; 2647 2648 return S; 2649} 2650 2651static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val, 2652 uint64_t Address, const void *Decoder) { 2653 DecodeStatus S = MCDisassembler::Success; 2654 2655 unsigned Rm = fieldFromInstruction(Val, 0, 4); 2656 unsigned align = fieldFromInstruction(Val, 4, 2); 2657 2658 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2659 return MCDisassembler::Fail; 2660 if (!align) 2661 Inst.addOperand(MCOperand::createImm(0)); 2662 else 2663 Inst.addOperand(MCOperand::createImm(4 << align)); 2664 2665 return S; 2666} 2667 2668static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn, 2669 uint64_t Address, const void *Decoder) { 2670 DecodeStatus S = MCDisassembler::Success; 2671 2672 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 2673 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 2674 unsigned wb = fieldFromInstruction(Insn, 16, 4); 2675 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 2676 Rn |= fieldFromInstruction(Insn, 4, 2) << 4; 2677 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 2678 2679 // First output register 2680 switch (Inst.getOpcode()) { 2681 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8: 2682 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register: 2683 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register: 2684 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register: 2685 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register: 2686 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8: 2687 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register: 2688 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register: 2689 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register: 2690 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder))) 2691 return MCDisassembler::Fail; 2692 break; 2693 case ARM::VLD2b16: 2694 case ARM::VLD2b32: 2695 case ARM::VLD2b8: 2696 case ARM::VLD2b16wb_fixed: 2697 case ARM::VLD2b16wb_register: 2698 case ARM::VLD2b32wb_fixed: 2699 case ARM::VLD2b32wb_register: 2700 case ARM::VLD2b8wb_fixed: 2701 case ARM::VLD2b8wb_register: 2702 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder))) 2703 return MCDisassembler::Fail; 2704 break; 2705 default: 2706 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2707 return MCDisassembler::Fail; 2708 } 2709 2710 // Second output register 2711 switch (Inst.getOpcode()) { 2712 case ARM::VLD3d8: 2713 case ARM::VLD3d16: 2714 case ARM::VLD3d32: 2715 case ARM::VLD3d8_UPD: 2716 case ARM::VLD3d16_UPD: 2717 case ARM::VLD3d32_UPD: 2718 case ARM::VLD4d8: 2719 case ARM::VLD4d16: 2720 case ARM::VLD4d32: 2721 case ARM::VLD4d8_UPD: 2722 case ARM::VLD4d16_UPD: 2723 case ARM::VLD4d32_UPD: 2724 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder))) 2725 return MCDisassembler::Fail; 2726 break; 2727 case ARM::VLD3q8: 2728 case ARM::VLD3q16: 2729 case ARM::VLD3q32: 2730 case ARM::VLD3q8_UPD: 2731 case ARM::VLD3q16_UPD: 2732 case ARM::VLD3q32_UPD: 2733 case ARM::VLD4q8: 2734 case ARM::VLD4q16: 2735 case ARM::VLD4q32: 2736 case ARM::VLD4q8_UPD: 2737 case ARM::VLD4q16_UPD: 2738 case ARM::VLD4q32_UPD: 2739 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder))) 2740 return MCDisassembler::Fail; 2741 break; 2742 default: 2743 break; 2744 } 2745 2746 // Third output register 2747 switch(Inst.getOpcode()) { 2748 case ARM::VLD3d8: 2749 case ARM::VLD3d16: 2750 case ARM::VLD3d32: 2751 case ARM::VLD3d8_UPD: 2752 case ARM::VLD3d16_UPD: 2753 case ARM::VLD3d32_UPD: 2754 case ARM::VLD4d8: 2755 case ARM::VLD4d16: 2756 case ARM::VLD4d32: 2757 case ARM::VLD4d8_UPD: 2758 case ARM::VLD4d16_UPD: 2759 case ARM::VLD4d32_UPD: 2760 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder))) 2761 return MCDisassembler::Fail; 2762 break; 2763 case ARM::VLD3q8: 2764 case ARM::VLD3q16: 2765 case ARM::VLD3q32: 2766 case ARM::VLD3q8_UPD: 2767 case ARM::VLD3q16_UPD: 2768 case ARM::VLD3q32_UPD: 2769 case ARM::VLD4q8: 2770 case ARM::VLD4q16: 2771 case ARM::VLD4q32: 2772 case ARM::VLD4q8_UPD: 2773 case ARM::VLD4q16_UPD: 2774 case ARM::VLD4q32_UPD: 2775 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder))) 2776 return MCDisassembler::Fail; 2777 break; 2778 default: 2779 break; 2780 } 2781 2782 // Fourth output register 2783 switch (Inst.getOpcode()) { 2784 case ARM::VLD4d8: 2785 case ARM::VLD4d16: 2786 case ARM::VLD4d32: 2787 case ARM::VLD4d8_UPD: 2788 case ARM::VLD4d16_UPD: 2789 case ARM::VLD4d32_UPD: 2790 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder))) 2791 return MCDisassembler::Fail; 2792 break; 2793 case ARM::VLD4q8: 2794 case ARM::VLD4q16: 2795 case ARM::VLD4q32: 2796 case ARM::VLD4q8_UPD: 2797 case ARM::VLD4q16_UPD: 2798 case ARM::VLD4q32_UPD: 2799 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder))) 2800 return MCDisassembler::Fail; 2801 break; 2802 default: 2803 break; 2804 } 2805 2806 // Writeback operand 2807 switch (Inst.getOpcode()) { 2808 case ARM::VLD1d8wb_fixed: 2809 case ARM::VLD1d16wb_fixed: 2810 case ARM::VLD1d32wb_fixed: 2811 case ARM::VLD1d64wb_fixed: 2812 case ARM::VLD1d8wb_register: 2813 case ARM::VLD1d16wb_register: 2814 case ARM::VLD1d32wb_register: 2815 case ARM::VLD1d64wb_register: 2816 case ARM::VLD1q8wb_fixed: 2817 case ARM::VLD1q16wb_fixed: 2818 case ARM::VLD1q32wb_fixed: 2819 case ARM::VLD1q64wb_fixed: 2820 case ARM::VLD1q8wb_register: 2821 case ARM::VLD1q16wb_register: 2822 case ARM::VLD1q32wb_register: 2823 case ARM::VLD1q64wb_register: 2824 case ARM::VLD1d8Twb_fixed: 2825 case ARM::VLD1d8Twb_register: 2826 case ARM::VLD1d16Twb_fixed: 2827 case ARM::VLD1d16Twb_register: 2828 case ARM::VLD1d32Twb_fixed: 2829 case ARM::VLD1d32Twb_register: 2830 case ARM::VLD1d64Twb_fixed: 2831 case ARM::VLD1d64Twb_register: 2832 case ARM::VLD1d8Qwb_fixed: 2833 case ARM::VLD1d8Qwb_register: 2834 case ARM::VLD1d16Qwb_fixed: 2835 case ARM::VLD1d16Qwb_register: 2836 case ARM::VLD1d32Qwb_fixed: 2837 case ARM::VLD1d32Qwb_register: 2838 case ARM::VLD1d64Qwb_fixed: 2839 case ARM::VLD1d64Qwb_register: 2840 case ARM::VLD2d8wb_fixed: 2841 case ARM::VLD2d16wb_fixed: 2842 case ARM::VLD2d32wb_fixed: 2843 case ARM::VLD2q8wb_fixed: 2844 case ARM::VLD2q16wb_fixed: 2845 case ARM::VLD2q32wb_fixed: 2846 case ARM::VLD2d8wb_register: 2847 case ARM::VLD2d16wb_register: 2848 case ARM::VLD2d32wb_register: 2849 case ARM::VLD2q8wb_register: 2850 case ARM::VLD2q16wb_register: 2851 case ARM::VLD2q32wb_register: 2852 case ARM::VLD2b8wb_fixed: 2853 case ARM::VLD2b16wb_fixed: 2854 case ARM::VLD2b32wb_fixed: 2855 case ARM::VLD2b8wb_register: 2856 case ARM::VLD2b16wb_register: 2857 case ARM::VLD2b32wb_register: 2858 Inst.addOperand(MCOperand::createImm(0)); 2859 break; 2860 case ARM::VLD3d8_UPD: 2861 case ARM::VLD3d16_UPD: 2862 case ARM::VLD3d32_UPD: 2863 case ARM::VLD3q8_UPD: 2864 case ARM::VLD3q16_UPD: 2865 case ARM::VLD3q32_UPD: 2866 case ARM::VLD4d8_UPD: 2867 case ARM::VLD4d16_UPD: 2868 case ARM::VLD4d32_UPD: 2869 case ARM::VLD4q8_UPD: 2870 case ARM::VLD4q16_UPD: 2871 case ARM::VLD4q32_UPD: 2872 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder))) 2873 return MCDisassembler::Fail; 2874 break; 2875 default: 2876 break; 2877 } 2878 2879 // AddrMode6 Base (register+alignment) 2880 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder))) 2881 return MCDisassembler::Fail; 2882 2883 // AddrMode6 Offset (register) 2884 switch (Inst.getOpcode()) { 2885 default: 2886 // The below have been updated to have explicit am6offset split 2887 // between fixed and register offset. For those instructions not 2888 // yet updated, we need to add an additional reg0 operand for the 2889 // fixed variant. 2890 // 2891 // The fixed offset encodes as Rm == 0xd, so we check for that. 2892 if (Rm == 0xd) { 2893 Inst.addOperand(MCOperand::createReg(0)); 2894 break; 2895 } 2896 // Fall through to handle the register offset variant. 2897 LLVM_FALLTHROUGH; 2898 case ARM::VLD1d8wb_fixed: 2899 case ARM::VLD1d16wb_fixed: 2900 case ARM::VLD1d32wb_fixed: 2901 case ARM::VLD1d64wb_fixed: 2902 case ARM::VLD1d8Twb_fixed: 2903 case ARM::VLD1d16Twb_fixed: 2904 case ARM::VLD1d32Twb_fixed: 2905 case ARM::VLD1d64Twb_fixed: 2906 case ARM::VLD1d8Qwb_fixed: 2907 case ARM::VLD1d16Qwb_fixed: 2908 case ARM::VLD1d32Qwb_fixed: 2909 case ARM::VLD1d64Qwb_fixed: 2910 case ARM::VLD1d8wb_register: 2911 case ARM::VLD1d16wb_register: 2912 case ARM::VLD1d32wb_register: 2913 case ARM::VLD1d64wb_register: 2914 case ARM::VLD1q8wb_fixed: 2915 case ARM::VLD1q16wb_fixed: 2916 case ARM::VLD1q32wb_fixed: 2917 case ARM::VLD1q64wb_fixed: 2918 case ARM::VLD1q8wb_register: 2919 case ARM::VLD1q16wb_register: 2920 case ARM::VLD1q32wb_register: 2921 case ARM::VLD1q64wb_register: 2922 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback 2923 // variant encodes Rm == 0xf. Anything else is a register offset post- 2924 // increment and we need to add the register operand to the instruction. 2925 if (Rm != 0xD && Rm != 0xF && 2926 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2927 return MCDisassembler::Fail; 2928 break; 2929 case ARM::VLD2d8wb_fixed: 2930 case ARM::VLD2d16wb_fixed: 2931 case ARM::VLD2d32wb_fixed: 2932 case ARM::VLD2b8wb_fixed: 2933 case ARM::VLD2b16wb_fixed: 2934 case ARM::VLD2b32wb_fixed: 2935 case ARM::VLD2q8wb_fixed: 2936 case ARM::VLD2q16wb_fixed: 2937 case ARM::VLD2q32wb_fixed: 2938 break; 2939 } 2940 2941 return S; 2942} 2943 2944static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Insn, 2945 uint64_t Address, const void *Decoder) { 2946 unsigned type = fieldFromInstruction(Insn, 8, 4); 2947 unsigned align = fieldFromInstruction(Insn, 4, 2); 2948 if (type == 6 && (align & 2)) return MCDisassembler::Fail; 2949 if (type == 7 && (align & 2)) return MCDisassembler::Fail; 2950 if (type == 10 && align == 3) return MCDisassembler::Fail; 2951 2952 unsigned load = fieldFromInstruction(Insn, 21, 1); 2953 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) 2954 : DecodeVSTInstruction(Inst, Insn, Address, Decoder); 2955} 2956 2957static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Insn, 2958 uint64_t Address, const void *Decoder) { 2959 unsigned size = fieldFromInstruction(Insn, 6, 2); 2960 if (size == 3) return MCDisassembler::Fail; 2961 2962 unsigned type = fieldFromInstruction(Insn, 8, 4); 2963 unsigned align = fieldFromInstruction(Insn, 4, 2); 2964 if (type == 8 && align == 3) return MCDisassembler::Fail; 2965 if (type == 9 && align == 3) return MCDisassembler::Fail; 2966 2967 unsigned load = fieldFromInstruction(Insn, 21, 1); 2968 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) 2969 : DecodeVSTInstruction(Inst, Insn, Address, Decoder); 2970} 2971 2972static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Insn, 2973 uint64_t Address, const void *Decoder) { 2974 unsigned size = fieldFromInstruction(Insn, 6, 2); 2975 if (size == 3) return MCDisassembler::Fail; 2976 2977 unsigned align = fieldFromInstruction(Insn, 4, 2); 2978 if (align & 2) return MCDisassembler::Fail; 2979 2980 unsigned load = fieldFromInstruction(Insn, 21, 1); 2981 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) 2982 : DecodeVSTInstruction(Inst, Insn, Address, Decoder); 2983} 2984 2985static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Insn, 2986 uint64_t Address, const void *Decoder) { 2987 unsigned size = fieldFromInstruction(Insn, 6, 2); 2988 if (size == 3) return MCDisassembler::Fail; 2989 2990 unsigned load = fieldFromInstruction(Insn, 21, 1); 2991 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) 2992 : DecodeVSTInstruction(Inst, Insn, Address, Decoder); 2993} 2994 2995static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn, 2996 uint64_t Address, const void *Decoder) { 2997 DecodeStatus S = MCDisassembler::Success; 2998 2999 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 3000 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 3001 unsigned wb = fieldFromInstruction(Insn, 16, 4); 3002 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 3003 Rn |= fieldFromInstruction(Insn, 4, 2) << 4; 3004 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 3005 3006 // Writeback Operand 3007 switch (Inst.getOpcode()) { 3008 case ARM::VST1d8wb_fixed: 3009 case ARM::VST1d16wb_fixed: 3010 case ARM::VST1d32wb_fixed: 3011 case ARM::VST1d64wb_fixed: 3012 case ARM::VST1d8wb_register: 3013 case ARM::VST1d16wb_register: 3014 case ARM::VST1d32wb_register: 3015 case ARM::VST1d64wb_register: 3016 case ARM::VST1q8wb_fixed: 3017 case ARM::VST1q16wb_fixed: 3018 case ARM::VST1q32wb_fixed: 3019 case ARM::VST1q64wb_fixed: 3020 case ARM::VST1q8wb_register: 3021 case ARM::VST1q16wb_register: 3022 case ARM::VST1q32wb_register: 3023 case ARM::VST1q64wb_register: 3024 case ARM::VST1d8Twb_fixed: 3025 case ARM::VST1d16Twb_fixed: 3026 case ARM::VST1d32Twb_fixed: 3027 case ARM::VST1d64Twb_fixed: 3028 case ARM::VST1d8Twb_register: 3029 case ARM::VST1d16Twb_register: 3030 case ARM::VST1d32Twb_register: 3031 case ARM::VST1d64Twb_register: 3032 case ARM::VST1d8Qwb_fixed: 3033 case ARM::VST1d16Qwb_fixed: 3034 case ARM::VST1d32Qwb_fixed: 3035 case ARM::VST1d64Qwb_fixed: 3036 case ARM::VST1d8Qwb_register: 3037 case ARM::VST1d16Qwb_register: 3038 case ARM::VST1d32Qwb_register: 3039 case ARM::VST1d64Qwb_register: 3040 case ARM::VST2d8wb_fixed: 3041 case ARM::VST2d16wb_fixed: 3042 case ARM::VST2d32wb_fixed: 3043 case ARM::VST2d8wb_register: 3044 case ARM::VST2d16wb_register: 3045 case ARM::VST2d32wb_register: 3046 case ARM::VST2q8wb_fixed: 3047 case ARM::VST2q16wb_fixed: 3048 case ARM::VST2q32wb_fixed: 3049 case ARM::VST2q8wb_register: 3050 case ARM::VST2q16wb_register: 3051 case ARM::VST2q32wb_register: 3052 case ARM::VST2b8wb_fixed: 3053 case ARM::VST2b16wb_fixed: 3054 case ARM::VST2b32wb_fixed: 3055 case ARM::VST2b8wb_register: 3056 case ARM::VST2b16wb_register: 3057 case ARM::VST2b32wb_register: 3058 if (Rm == 0xF) 3059 return MCDisassembler::Fail; 3060 Inst.addOperand(MCOperand::createImm(0)); 3061 break; 3062 case ARM::VST3d8_UPD: 3063 case ARM::VST3d16_UPD: 3064 case ARM::VST3d32_UPD: 3065 case ARM::VST3q8_UPD: 3066 case ARM::VST3q16_UPD: 3067 case ARM::VST3q32_UPD: 3068 case ARM::VST4d8_UPD: 3069 case ARM::VST4d16_UPD: 3070 case ARM::VST4d32_UPD: 3071 case ARM::VST4q8_UPD: 3072 case ARM::VST4q16_UPD: 3073 case ARM::VST4q32_UPD: 3074 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder))) 3075 return MCDisassembler::Fail; 3076 break; 3077 default: 3078 break; 3079 } 3080 3081 // AddrMode6 Base (register+alignment) 3082 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder))) 3083 return MCDisassembler::Fail; 3084 3085 // AddrMode6 Offset (register) 3086 switch (Inst.getOpcode()) { 3087 default: 3088 if (Rm == 0xD) 3089 Inst.addOperand(MCOperand::createReg(0)); 3090 else if (Rm != 0xF) { 3091 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3092 return MCDisassembler::Fail; 3093 } 3094 break; 3095 case ARM::VST1d8wb_fixed: 3096 case ARM::VST1d16wb_fixed: 3097 case ARM::VST1d32wb_fixed: 3098 case ARM::VST1d64wb_fixed: 3099 case ARM::VST1q8wb_fixed: 3100 case ARM::VST1q16wb_fixed: 3101 case ARM::VST1q32wb_fixed: 3102 case ARM::VST1q64wb_fixed: 3103 case ARM::VST1d8Twb_fixed: 3104 case ARM::VST1d16Twb_fixed: 3105 case ARM::VST1d32Twb_fixed: 3106 case ARM::VST1d64Twb_fixed: 3107 case ARM::VST1d8Qwb_fixed: 3108 case ARM::VST1d16Qwb_fixed: 3109 case ARM::VST1d32Qwb_fixed: 3110 case ARM::VST1d64Qwb_fixed: 3111 case ARM::VST2d8wb_fixed: 3112 case ARM::VST2d16wb_fixed: 3113 case ARM::VST2d32wb_fixed: 3114 case ARM::VST2q8wb_fixed: 3115 case ARM::VST2q16wb_fixed: 3116 case ARM::VST2q32wb_fixed: 3117 case ARM::VST2b8wb_fixed: 3118 case ARM::VST2b16wb_fixed: 3119 case ARM::VST2b32wb_fixed: 3120 break; 3121 } 3122 3123 // First input register 3124 switch (Inst.getOpcode()) { 3125 case ARM::VST1q16: 3126 case ARM::VST1q32: 3127 case ARM::VST1q64: 3128 case ARM::VST1q8: 3129 case ARM::VST1q16wb_fixed: 3130 case ARM::VST1q16wb_register: 3131 case ARM::VST1q32wb_fixed: 3132 case ARM::VST1q32wb_register: 3133 case ARM::VST1q64wb_fixed: 3134 case ARM::VST1q64wb_register: 3135 case ARM::VST1q8wb_fixed: 3136 case ARM::VST1q8wb_register: 3137 case ARM::VST2d16: 3138 case ARM::VST2d32: 3139 case ARM::VST2d8: 3140 case ARM::VST2d16wb_fixed: 3141 case ARM::VST2d16wb_register: 3142 case ARM::VST2d32wb_fixed: 3143 case ARM::VST2d32wb_register: 3144 case ARM::VST2d8wb_fixed: 3145 case ARM::VST2d8wb_register: 3146 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder))) 3147 return MCDisassembler::Fail; 3148 break; 3149 case ARM::VST2b16: 3150 case ARM::VST2b32: 3151 case ARM::VST2b8: 3152 case ARM::VST2b16wb_fixed: 3153 case ARM::VST2b16wb_register: 3154 case ARM::VST2b32wb_fixed: 3155 case ARM::VST2b32wb_register: 3156 case ARM::VST2b8wb_fixed: 3157 case ARM::VST2b8wb_register: 3158 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder))) 3159 return MCDisassembler::Fail; 3160 break; 3161 default: 3162 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3163 return MCDisassembler::Fail; 3164 } 3165 3166 // Second input register 3167 switch (Inst.getOpcode()) { 3168 case ARM::VST3d8: 3169 case ARM::VST3d16: 3170 case ARM::VST3d32: 3171 case ARM::VST3d8_UPD: 3172 case ARM::VST3d16_UPD: 3173 case ARM::VST3d32_UPD: 3174 case ARM::VST4d8: 3175 case ARM::VST4d16: 3176 case ARM::VST4d32: 3177 case ARM::VST4d8_UPD: 3178 case ARM::VST4d16_UPD: 3179 case ARM::VST4d32_UPD: 3180 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder))) 3181 return MCDisassembler::Fail; 3182 break; 3183 case ARM::VST3q8: 3184 case ARM::VST3q16: 3185 case ARM::VST3q32: 3186 case ARM::VST3q8_UPD: 3187 case ARM::VST3q16_UPD: 3188 case ARM::VST3q32_UPD: 3189 case ARM::VST4q8: 3190 case ARM::VST4q16: 3191 case ARM::VST4q32: 3192 case ARM::VST4q8_UPD: 3193 case ARM::VST4q16_UPD: 3194 case ARM::VST4q32_UPD: 3195 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder))) 3196 return MCDisassembler::Fail; 3197 break; 3198 default: 3199 break; 3200 } 3201 3202 // Third input register 3203 switch (Inst.getOpcode()) { 3204 case ARM::VST3d8: 3205 case ARM::VST3d16: 3206 case ARM::VST3d32: 3207 case ARM::VST3d8_UPD: 3208 case ARM::VST3d16_UPD: 3209 case ARM::VST3d32_UPD: 3210 case ARM::VST4d8: 3211 case ARM::VST4d16: 3212 case ARM::VST4d32: 3213 case ARM::VST4d8_UPD: 3214 case ARM::VST4d16_UPD: 3215 case ARM::VST4d32_UPD: 3216 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder))) 3217 return MCDisassembler::Fail; 3218 break; 3219 case ARM::VST3q8: 3220 case ARM::VST3q16: 3221 case ARM::VST3q32: 3222 case ARM::VST3q8_UPD: 3223 case ARM::VST3q16_UPD: 3224 case ARM::VST3q32_UPD: 3225 case ARM::VST4q8: 3226 case ARM::VST4q16: 3227 case ARM::VST4q32: 3228 case ARM::VST4q8_UPD: 3229 case ARM::VST4q16_UPD: 3230 case ARM::VST4q32_UPD: 3231 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder))) 3232 return MCDisassembler::Fail; 3233 break; 3234 default: 3235 break; 3236 } 3237 3238 // Fourth input register 3239 switch (Inst.getOpcode()) { 3240 case ARM::VST4d8: 3241 case ARM::VST4d16: 3242 case ARM::VST4d32: 3243 case ARM::VST4d8_UPD: 3244 case ARM::VST4d16_UPD: 3245 case ARM::VST4d32_UPD: 3246 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder))) 3247 return MCDisassembler::Fail; 3248 break; 3249 case ARM::VST4q8: 3250 case ARM::VST4q16: 3251 case ARM::VST4q32: 3252 case ARM::VST4q8_UPD: 3253 case ARM::VST4q16_UPD: 3254 case ARM::VST4q32_UPD: 3255 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder))) 3256 return MCDisassembler::Fail; 3257 break; 3258 default: 3259 break; 3260 } 3261 3262 return S; 3263} 3264 3265static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn, 3266 uint64_t Address, const void *Decoder) { 3267 DecodeStatus S = MCDisassembler::Success; 3268 3269 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 3270 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 3271 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 3272 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 3273 unsigned align = fieldFromInstruction(Insn, 4, 1); 3274 unsigned size = fieldFromInstruction(Insn, 6, 2); 3275 3276 if (size == 0 && align == 1) 3277 return MCDisassembler::Fail; 3278 align *= (1 << size); 3279 3280 switch (Inst.getOpcode()) { 3281 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8: 3282 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register: 3283 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register: 3284 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register: 3285 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder))) 3286 return MCDisassembler::Fail; 3287 break; 3288 default: 3289 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3290 return MCDisassembler::Fail; 3291 break; 3292 } 3293 if (Rm != 0xF) { 3294 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3295 return MCDisassembler::Fail; 3296 } 3297 3298 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3299 return MCDisassembler::Fail; 3300 Inst.addOperand(MCOperand::createImm(align)); 3301 3302 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback 3303 // variant encodes Rm == 0xf. Anything else is a register offset post- 3304 // increment and we need to add the register operand to the instruction. 3305 if (Rm != 0xD && Rm != 0xF && 3306 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3307 return MCDisassembler::Fail; 3308 3309 return S; 3310} 3311 3312static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn, 3313 uint64_t Address, const void *Decoder) { 3314 DecodeStatus S = MCDisassembler::Success; 3315 3316 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 3317 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 3318 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 3319 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 3320 unsigned align = fieldFromInstruction(Insn, 4, 1); 3321 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2); 3322 align *= 2*size; 3323 3324 switch (Inst.getOpcode()) { 3325 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8: 3326 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register: 3327 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register: 3328 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register: 3329 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder))) 3330 return MCDisassembler::Fail; 3331 break; 3332 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2: 3333 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register: 3334 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register: 3335 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register: 3336 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder))) 3337 return MCDisassembler::Fail; 3338 break; 3339 default: 3340 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3341 return MCDisassembler::Fail; 3342 break; 3343 } 3344 3345 if (Rm != 0xF) 3346 Inst.addOperand(MCOperand::createImm(0)); 3347 3348 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3349 return MCDisassembler::Fail; 3350 Inst.addOperand(MCOperand::createImm(align)); 3351 3352 if (Rm != 0xD && Rm != 0xF) { 3353 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3354 return MCDisassembler::Fail; 3355 } 3356 3357 return S; 3358} 3359 3360static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn, 3361 uint64_t Address, const void *Decoder) { 3362 DecodeStatus S = MCDisassembler::Success; 3363 3364 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 3365 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 3366 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 3367 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 3368 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1; 3369 3370 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3371 return MCDisassembler::Fail; 3372 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder))) 3373 return MCDisassembler::Fail; 3374 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder))) 3375 return MCDisassembler::Fail; 3376 if (Rm != 0xF) { 3377 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3378 return MCDisassembler::Fail; 3379 } 3380 3381 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3382 return MCDisassembler::Fail; 3383 Inst.addOperand(MCOperand::createImm(0)); 3384 3385 if (Rm == 0xD) 3386 Inst.addOperand(MCOperand::createReg(0)); 3387 else if (Rm != 0xF) { 3388 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3389 return MCDisassembler::Fail; 3390 } 3391 3392 return S; 3393} 3394 3395static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn, 3396 uint64_t Address, const void *Decoder) { 3397 DecodeStatus S = MCDisassembler::Success; 3398 3399 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 3400 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 3401 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 3402 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 3403 unsigned size = fieldFromInstruction(Insn, 6, 2); 3404 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1; 3405 unsigned align = fieldFromInstruction(Insn, 4, 1); 3406 3407 if (size == 0x3) { 3408 if (align == 0) 3409 return MCDisassembler::Fail; 3410 align = 16; 3411 } else { 3412 if (size == 2) { 3413 align *= 8; 3414 } else { 3415 size = 1 << size; 3416 align *= 4*size; 3417 } 3418 } 3419 3420 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3421 return MCDisassembler::Fail; 3422 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder))) 3423 return MCDisassembler::Fail; 3424 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder))) 3425 return MCDisassembler::Fail; 3426 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder))) 3427 return MCDisassembler::Fail; 3428 if (Rm != 0xF) { 3429 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3430 return MCDisassembler::Fail; 3431 } 3432 3433 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3434 return MCDisassembler::Fail; 3435 Inst.addOperand(MCOperand::createImm(align)); 3436 3437 if (Rm == 0xD) 3438 Inst.addOperand(MCOperand::createReg(0)); 3439 else if (Rm != 0xF) { 3440 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3441 return MCDisassembler::Fail; 3442 } 3443 3444 return S; 3445} 3446 3447static DecodeStatus 3448DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn, 3449 uint64_t Address, const void *Decoder) { 3450 DecodeStatus S = MCDisassembler::Success; 3451 3452 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 3453 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 3454 unsigned imm = fieldFromInstruction(Insn, 0, 4); 3455 imm |= fieldFromInstruction(Insn, 16, 3) << 4; 3456 imm |= fieldFromInstruction(Insn, 24, 1) << 7; 3457 imm |= fieldFromInstruction(Insn, 8, 4) << 8; 3458 imm |= fieldFromInstruction(Insn, 5, 1) << 12; 3459 unsigned Q = fieldFromInstruction(Insn, 6, 1); 3460 3461 if (Q) { 3462 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder))) 3463 return MCDisassembler::Fail; 3464 } else { 3465 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3466 return MCDisassembler::Fail; 3467 } 3468 3469 Inst.addOperand(MCOperand::createImm(imm)); 3470 3471 switch (Inst.getOpcode()) { 3472 case ARM::VORRiv4i16: 3473 case ARM::VORRiv2i32: 3474 case ARM::VBICiv4i16: 3475 case ARM::VBICiv2i32: 3476 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3477 return MCDisassembler::Fail; 3478 break; 3479 case ARM::VORRiv8i16: 3480 case ARM::VORRiv4i32: 3481 case ARM::VBICiv8i16: 3482 case ARM::VBICiv4i32: 3483 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder))) 3484 return MCDisassembler::Fail; 3485 break; 3486 default: 3487 break; 3488 } 3489 3490 return S; 3491} 3492 3493static DecodeStatus 3494DecodeMVEModImmInstruction(MCInst &Inst, unsigned Insn, 3495 uint64_t Address, const void *Decoder) { 3496 DecodeStatus S = MCDisassembler::Success; 3497 3498 unsigned Qd = ((fieldFromInstruction(Insn, 22, 1) << 3) | 3499 fieldFromInstruction(Insn, 13, 3)); 3500 unsigned cmode = fieldFromInstruction(Insn, 8, 4); 3501 unsigned imm = fieldFromInstruction(Insn, 0, 4); 3502 imm |= fieldFromInstruction(Insn, 16, 3) << 4; 3503 imm |= fieldFromInstruction(Insn, 28, 1) << 7; 3504 imm |= cmode << 8; 3505 imm |= fieldFromInstruction(Insn, 5, 1) << 12; 3506 3507 if (cmode == 0xF && Inst.getOpcode() == ARM::MVE_VMVNimmi32) 3508 return MCDisassembler::Fail; 3509 3510 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder))) 3511 return MCDisassembler::Fail; 3512 3513 Inst.addOperand(MCOperand::createImm(imm)); 3514 3515 Inst.addOperand(MCOperand::createImm(ARMVCC::None)); 3516 Inst.addOperand(MCOperand::createReg(0)); 3517 Inst.addOperand(MCOperand::createImm(0)); 3518 3519 return S; 3520} 3521 3522static DecodeStatus DecodeMVEVADCInstruction(MCInst &Inst, unsigned Insn, 3523 uint64_t Address, const void *Decoder) { 3524 DecodeStatus S = MCDisassembler::Success; 3525 3526 unsigned Qd = fieldFromInstruction(Insn, 13, 3); 3527 Qd |= fieldFromInstruction(Insn, 22, 1) << 3; 3528 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder))) 3529 return MCDisassembler::Fail; 3530 Inst.addOperand(MCOperand::createReg(ARM::FPSCR_NZCV)); 3531 3532 unsigned Qn = fieldFromInstruction(Insn, 17, 3); 3533 Qn |= fieldFromInstruction(Insn, 7, 1) << 3; 3534 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qn, Address, Decoder))) 3535 return MCDisassembler::Fail; 3536 unsigned Qm = fieldFromInstruction(Insn, 1, 3); 3537 Qm |= fieldFromInstruction(Insn, 5, 1) << 3; 3538 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qm, Address, Decoder))) 3539 return MCDisassembler::Fail; 3540 if (!fieldFromInstruction(Insn, 12, 1)) // I bit clear => need input FPSCR 3541 Inst.addOperand(MCOperand::createReg(ARM::FPSCR_NZCV)); 3542 Inst.addOperand(MCOperand::createImm(Qd)); 3543 3544 return S; 3545} 3546 3547static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn, 3548 uint64_t Address, const void *Decoder) { 3549 DecodeStatus S = MCDisassembler::Success; 3550 3551 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 3552 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 3553 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 3554 Rm |= fieldFromInstruction(Insn, 5, 1) << 4; 3555 unsigned size = fieldFromInstruction(Insn, 18, 2); 3556 3557 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder))) 3558 return MCDisassembler::Fail; 3559 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder))) 3560 return MCDisassembler::Fail; 3561 Inst.addOperand(MCOperand::createImm(8 << size)); 3562 3563 return S; 3564} 3565 3566static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val, 3567 uint64_t Address, const void *Decoder) { 3568 Inst.addOperand(MCOperand::createImm(8 - Val)); 3569 return MCDisassembler::Success; 3570} 3571 3572static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val, 3573 uint64_t Address, const void *Decoder) { 3574 Inst.addOperand(MCOperand::createImm(16 - Val)); 3575 return MCDisassembler::Success; 3576} 3577 3578static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val, 3579 uint64_t Address, const void *Decoder) { 3580 Inst.addOperand(MCOperand::createImm(32 - Val)); 3581 return MCDisassembler::Success; 3582} 3583 3584static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val, 3585 uint64_t Address, const void *Decoder) { 3586 Inst.addOperand(MCOperand::createImm(64 - Val)); 3587 return MCDisassembler::Success; 3588} 3589 3590static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn, 3591 uint64_t Address, const void *Decoder) { 3592 DecodeStatus S = MCDisassembler::Success; 3593 3594 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 3595 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 3596 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 3597 Rn |= fieldFromInstruction(Insn, 7, 1) << 4; 3598 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 3599 Rm |= fieldFromInstruction(Insn, 5, 1) << 4; 3600 unsigned op = fieldFromInstruction(Insn, 6, 1); 3601 3602 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3603 return MCDisassembler::Fail; 3604 if (op) { 3605 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3606 return MCDisassembler::Fail; // Writeback 3607 } 3608 3609 switch (Inst.getOpcode()) { 3610 case ARM::VTBL2: 3611 case ARM::VTBX2: 3612 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder))) 3613 return MCDisassembler::Fail; 3614 break; 3615 default: 3616 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder))) 3617 return MCDisassembler::Fail; 3618 } 3619 3620 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder))) 3621 return MCDisassembler::Fail; 3622 3623 return S; 3624} 3625 3626static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn, 3627 uint64_t Address, const void *Decoder) { 3628 DecodeStatus S = MCDisassembler::Success; 3629 3630 unsigned dst = fieldFromInstruction(Insn, 8, 3); 3631 unsigned imm = fieldFromInstruction(Insn, 0, 8); 3632 3633 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder))) 3634 return MCDisassembler::Fail; 3635 3636 switch(Inst.getOpcode()) { 3637 default: 3638 return MCDisassembler::Fail; 3639 case ARM::tADR: 3640 break; // tADR does not explicitly represent the PC as an operand. 3641 case ARM::tADDrSPi: 3642 Inst.addOperand(MCOperand::createReg(ARM::SP)); 3643 break; 3644 } 3645 3646 Inst.addOperand(MCOperand::createImm(imm)); 3647 return S; 3648} 3649 3650static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val, 3651 uint64_t Address, const void *Decoder) { 3652 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4, 3653 true, 2, Inst, Decoder)) 3654 Inst.addOperand(MCOperand::createImm(SignExtend32<12>(Val << 1))); 3655 return MCDisassembler::Success; 3656} 3657 3658static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val, 3659 uint64_t Address, const void *Decoder) { 3660 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4, 3661 true, 4, Inst, Decoder)) 3662 Inst.addOperand(MCOperand::createImm(SignExtend32<21>(Val))); 3663 return MCDisassembler::Success; 3664} 3665 3666static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val, 3667 uint64_t Address, const void *Decoder) { 3668 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4, 3669 true, 2, Inst, Decoder)) 3670 Inst.addOperand(MCOperand::createImm(Val << 1)); 3671 return MCDisassembler::Success; 3672} 3673 3674static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val, 3675 uint64_t Address, const void *Decoder) { 3676 DecodeStatus S = MCDisassembler::Success; 3677 3678 unsigned Rn = fieldFromInstruction(Val, 0, 3); 3679 unsigned Rm = fieldFromInstruction(Val, 3, 3); 3680 3681 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder))) 3682 return MCDisassembler::Fail; 3683 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder))) 3684 return MCDisassembler::Fail; 3685 3686 return S; 3687} 3688 3689static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val, 3690 uint64_t Address, const void *Decoder) { 3691 DecodeStatus S = MCDisassembler::Success; 3692 3693 unsigned Rn = fieldFromInstruction(Val, 0, 3); 3694 unsigned imm = fieldFromInstruction(Val, 3, 5); 3695 3696 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder))) 3697 return MCDisassembler::Fail; 3698 Inst.addOperand(MCOperand::createImm(imm)); 3699 3700 return S; 3701} 3702 3703static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val, 3704 uint64_t Address, const void *Decoder) { 3705 unsigned imm = Val << 2; 3706 3707 Inst.addOperand(MCOperand::createImm(imm)); 3708 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder); 3709 3710 return MCDisassembler::Success; 3711} 3712 3713static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val, 3714 uint64_t Address, const void *Decoder) { 3715 Inst.addOperand(MCOperand::createReg(ARM::SP)); 3716 Inst.addOperand(MCOperand::createImm(Val)); 3717 3718 return MCDisassembler::Success; 3719} 3720 3721static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val, 3722 uint64_t Address, const void *Decoder) { 3723 DecodeStatus S = MCDisassembler::Success; 3724 3725 unsigned Rn = fieldFromInstruction(Val, 6, 4); 3726 unsigned Rm = fieldFromInstruction(Val, 2, 4); 3727 unsigned imm = fieldFromInstruction(Val, 0, 2); 3728 3729 // Thumb stores cannot use PC as dest register. 3730 switch (Inst.getOpcode()) { 3731 case ARM::t2STRHs: 3732 case ARM::t2STRBs: 3733 case ARM::t2STRs: 3734 if (Rn == 15) 3735 return MCDisassembler::Fail; 3736 break; 3737 default: 3738 break; 3739 } 3740 3741 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3742 return MCDisassembler::Fail; 3743 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))) 3744 return MCDisassembler::Fail; 3745 Inst.addOperand(MCOperand::createImm(imm)); 3746 3747 return S; 3748} 3749 3750static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn, 3751 uint64_t Address, const void *Decoder) { 3752 DecodeStatus S = MCDisassembler::Success; 3753 3754 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 3755 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 3756 3757 const FeatureBitset &featureBits = 3758 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits(); 3759 3760 bool hasMP = featureBits[ARM::FeatureMP]; 3761 bool hasV7Ops = featureBits[ARM::HasV7Ops]; 3762 3763 if (Rn == 15) { 3764 switch (Inst.getOpcode()) { 3765 case ARM::t2LDRBs: 3766 Inst.setOpcode(ARM::t2LDRBpci); 3767 break; 3768 case ARM::t2LDRHs: 3769 Inst.setOpcode(ARM::t2LDRHpci); 3770 break; 3771 case ARM::t2LDRSHs: 3772 Inst.setOpcode(ARM::t2LDRSHpci); 3773 break; 3774 case ARM::t2LDRSBs: 3775 Inst.setOpcode(ARM::t2LDRSBpci); 3776 break; 3777 case ARM::t2LDRs: 3778 Inst.setOpcode(ARM::t2LDRpci); 3779 break; 3780 case ARM::t2PLDs: 3781 Inst.setOpcode(ARM::t2PLDpci); 3782 break; 3783 case ARM::t2PLIs: 3784 Inst.setOpcode(ARM::t2PLIpci); 3785 break; 3786 default: 3787 return MCDisassembler::Fail; 3788 } 3789 3790 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); 3791 } 3792 3793 if (Rt == 15) { 3794 switch (Inst.getOpcode()) { 3795 case ARM::t2LDRSHs: 3796 return MCDisassembler::Fail; 3797 case ARM::t2LDRHs: 3798 Inst.setOpcode(ARM::t2PLDWs); 3799 break; 3800 case ARM::t2LDRSBs: 3801 Inst.setOpcode(ARM::t2PLIs); 3802 break; 3803 default: 3804 break; 3805 } 3806 } 3807 3808 switch (Inst.getOpcode()) { 3809 case ARM::t2PLDs: 3810 break; 3811 case ARM::t2PLIs: 3812 if (!hasV7Ops) 3813 return MCDisassembler::Fail; 3814 break; 3815 case ARM::t2PLDWs: 3816 if (!hasV7Ops || !hasMP) 3817 return MCDisassembler::Fail; 3818 break; 3819 default: 3820 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 3821 return MCDisassembler::Fail; 3822 } 3823 3824 unsigned addrmode = fieldFromInstruction(Insn, 4, 2); 3825 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2; 3826 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6; 3827 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder))) 3828 return MCDisassembler::Fail; 3829 3830 return S; 3831} 3832 3833static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn, 3834 uint64_t Address, const void* Decoder) { 3835 DecodeStatus S = MCDisassembler::Success; 3836 3837 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 3838 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 3839 unsigned U = fieldFromInstruction(Insn, 9, 1); 3840 unsigned imm = fieldFromInstruction(Insn, 0, 8); 3841 imm |= (U << 8); 3842 imm |= (Rn << 9); 3843 unsigned add = fieldFromInstruction(Insn, 9, 1); 3844 3845 const FeatureBitset &featureBits = 3846 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits(); 3847 3848 bool hasMP = featureBits[ARM::FeatureMP]; 3849 bool hasV7Ops = featureBits[ARM::HasV7Ops]; 3850 3851 if (Rn == 15) { 3852 switch (Inst.getOpcode()) { 3853 case ARM::t2LDRi8: 3854 Inst.setOpcode(ARM::t2LDRpci); 3855 break; 3856 case ARM::t2LDRBi8: 3857 Inst.setOpcode(ARM::t2LDRBpci); 3858 break; 3859 case ARM::t2LDRSBi8: 3860 Inst.setOpcode(ARM::t2LDRSBpci); 3861 break; 3862 case ARM::t2LDRHi8: 3863 Inst.setOpcode(ARM::t2LDRHpci); 3864 break; 3865 case ARM::t2LDRSHi8: 3866 Inst.setOpcode(ARM::t2LDRSHpci); 3867 break; 3868 case ARM::t2PLDi8: 3869 Inst.setOpcode(ARM::t2PLDpci); 3870 break; 3871 case ARM::t2PLIi8: 3872 Inst.setOpcode(ARM::t2PLIpci); 3873 break; 3874 default: 3875 return MCDisassembler::Fail; 3876 } 3877 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); 3878 } 3879 3880 if (Rt == 15) { 3881 switch (Inst.getOpcode()) { 3882 case ARM::t2LDRSHi8: 3883 return MCDisassembler::Fail; 3884 case ARM::t2LDRHi8: 3885 if (!add) 3886 Inst.setOpcode(ARM::t2PLDWi8); 3887 break; 3888 case ARM::t2LDRSBi8: 3889 Inst.setOpcode(ARM::t2PLIi8); 3890 break; 3891 default: 3892 break; 3893 } 3894 } 3895 3896 switch (Inst.getOpcode()) { 3897 case ARM::t2PLDi8: 3898 break; 3899 case ARM::t2PLIi8: 3900 if (!hasV7Ops) 3901 return MCDisassembler::Fail; 3902 break; 3903 case ARM::t2PLDWi8: 3904 if (!hasV7Ops || !hasMP) 3905 return MCDisassembler::Fail; 3906 break; 3907 default: 3908 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 3909 return MCDisassembler::Fail; 3910 } 3911 3912 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder))) 3913 return MCDisassembler::Fail; 3914 return S; 3915} 3916 3917static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn, 3918 uint64_t Address, const void* Decoder) { 3919 DecodeStatus S = MCDisassembler::Success; 3920 3921 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 3922 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 3923 unsigned imm = fieldFromInstruction(Insn, 0, 12); 3924 imm |= (Rn << 13); 3925 3926 const FeatureBitset &featureBits = 3927 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits(); 3928 3929 bool hasMP = featureBits[ARM::FeatureMP]; 3930 bool hasV7Ops = featureBits[ARM::HasV7Ops]; 3931 3932 if (Rn == 15) { 3933 switch (Inst.getOpcode()) { 3934 case ARM::t2LDRi12: 3935 Inst.setOpcode(ARM::t2LDRpci); 3936 break; 3937 case ARM::t2LDRHi12: 3938 Inst.setOpcode(ARM::t2LDRHpci); 3939 break; 3940 case ARM::t2LDRSHi12: 3941 Inst.setOpcode(ARM::t2LDRSHpci); 3942 break; 3943 case ARM::t2LDRBi12: 3944 Inst.setOpcode(ARM::t2LDRBpci); 3945 break; 3946 case ARM::t2LDRSBi12: 3947 Inst.setOpcode(ARM::t2LDRSBpci); 3948 break; 3949 case ARM::t2PLDi12: 3950 Inst.setOpcode(ARM::t2PLDpci); 3951 break; 3952 case ARM::t2PLIi12: 3953 Inst.setOpcode(ARM::t2PLIpci); 3954 break; 3955 default: 3956 return MCDisassembler::Fail; 3957 } 3958 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); 3959 } 3960 3961 if (Rt == 15) { 3962 switch (Inst.getOpcode()) { 3963 case ARM::t2LDRSHi12: 3964 return MCDisassembler::Fail; 3965 case ARM::t2LDRHi12: 3966 Inst.setOpcode(ARM::t2PLDWi12); 3967 break; 3968 case ARM::t2LDRSBi12: 3969 Inst.setOpcode(ARM::t2PLIi12); 3970 break; 3971 default: 3972 break; 3973 } 3974 } 3975 3976 switch (Inst.getOpcode()) { 3977 case ARM::t2PLDi12: 3978 break; 3979 case ARM::t2PLIi12: 3980 if (!hasV7Ops) 3981 return MCDisassembler::Fail; 3982 break; 3983 case ARM::t2PLDWi12: 3984 if (!hasV7Ops || !hasMP) 3985 return MCDisassembler::Fail; 3986 break; 3987 default: 3988 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 3989 return MCDisassembler::Fail; 3990 } 3991 3992 if (!Check(S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder))) 3993 return MCDisassembler::Fail; 3994 return S; 3995} 3996 3997static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn, 3998 uint64_t Address, const void* Decoder) { 3999 DecodeStatus S = MCDisassembler::Success; 4000 4001 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4002 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 4003 unsigned imm = fieldFromInstruction(Insn, 0, 8); 4004 imm |= (Rn << 9); 4005 4006 if (Rn == 15) { 4007 switch (Inst.getOpcode()) { 4008 case ARM::t2LDRT: 4009 Inst.setOpcode(ARM::t2LDRpci); 4010 break; 4011 case ARM::t2LDRBT: 4012 Inst.setOpcode(ARM::t2LDRBpci); 4013 break; 4014 case ARM::t2LDRHT: 4015 Inst.setOpcode(ARM::t2LDRHpci); 4016 break; 4017 case ARM::t2LDRSBT: 4018 Inst.setOpcode(ARM::t2LDRSBpci); 4019 break; 4020 case ARM::t2LDRSHT: 4021 Inst.setOpcode(ARM::t2LDRSHpci); 4022 break; 4023 default: 4024 return MCDisassembler::Fail; 4025 } 4026 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); 4027 } 4028 4029 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder))) 4030 return MCDisassembler::Fail; 4031 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder))) 4032 return MCDisassembler::Fail; 4033 return S; 4034} 4035 4036static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn, 4037 uint64_t Address, const void* Decoder) { 4038 DecodeStatus S = MCDisassembler::Success; 4039 4040 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 4041 unsigned U = fieldFromInstruction(Insn, 23, 1); 4042 int imm = fieldFromInstruction(Insn, 0, 12); 4043 4044 const FeatureBitset &featureBits = 4045 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits(); 4046 4047 bool hasV7Ops = featureBits[ARM::HasV7Ops]; 4048 4049 if (Rt == 15) { 4050 switch (Inst.getOpcode()) { 4051 case ARM::t2LDRBpci: 4052 case ARM::t2LDRHpci: 4053 Inst.setOpcode(ARM::t2PLDpci); 4054 break; 4055 case ARM::t2LDRSBpci: 4056 Inst.setOpcode(ARM::t2PLIpci); 4057 break; 4058 case ARM::t2LDRSHpci: 4059 return MCDisassembler::Fail; 4060 default: 4061 break; 4062 } 4063 } 4064 4065 switch(Inst.getOpcode()) { 4066 case ARM::t2PLDpci: 4067 break; 4068 case ARM::t2PLIpci: 4069 if (!hasV7Ops) 4070 return MCDisassembler::Fail; 4071 break; 4072 default: 4073 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 4074 return MCDisassembler::Fail; 4075 } 4076 4077 if (!U) { 4078 // Special case for #-0. 4079 if (imm == 0) 4080 imm = INT32_MIN; 4081 else 4082 imm = -imm; 4083 } 4084 Inst.addOperand(MCOperand::createImm(imm)); 4085 4086 return S; 4087} 4088 4089static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val, 4090 uint64_t Address, const void *Decoder) { 4091 if (Val == 0) 4092 Inst.addOperand(MCOperand::createImm(INT32_MIN)); 4093 else { 4094 int imm = Val & 0xFF; 4095 4096 if (!(Val & 0x100)) imm *= -1; 4097 Inst.addOperand(MCOperand::createImm(imm * 4)); 4098 } 4099 4100 return MCDisassembler::Success; 4101} 4102 4103static DecodeStatus DecodeT2Imm7S4(MCInst &Inst, unsigned Val, uint64_t Address, 4104 const void *Decoder) { 4105 if (Val == 0) 4106 Inst.addOperand(MCOperand::createImm(INT32_MIN)); 4107 else { 4108 int imm = Val & 0x7F; 4109 4110 if (!(Val & 0x80)) 4111 imm *= -1; 4112 Inst.addOperand(MCOperand::createImm(imm * 4)); 4113 } 4114 4115 return MCDisassembler::Success; 4116} 4117 4118static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val, 4119 uint64_t Address, const void *Decoder) { 4120 DecodeStatus S = MCDisassembler::Success; 4121 4122 unsigned Rn = fieldFromInstruction(Val, 9, 4); 4123 unsigned imm = fieldFromInstruction(Val, 0, 9); 4124 4125 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4126 return MCDisassembler::Fail; 4127 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder))) 4128 return MCDisassembler::Fail; 4129 4130 return S; 4131} 4132 4133static DecodeStatus DecodeT2AddrModeImm7s4(MCInst &Inst, unsigned Val, 4134 uint64_t Address, 4135 const void *Decoder) { 4136 DecodeStatus S = MCDisassembler::Success; 4137 4138 unsigned Rn = fieldFromInstruction(Val, 8, 4); 4139 unsigned imm = fieldFromInstruction(Val, 0, 8); 4140 4141 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 4142 return MCDisassembler::Fail; 4143 if (!Check(S, DecodeT2Imm7S4(Inst, imm, Address, Decoder))) 4144 return MCDisassembler::Fail; 4145 4146 return S; 4147} 4148 4149static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val, 4150 uint64_t Address, const void *Decoder) { 4151 DecodeStatus S = MCDisassembler::Success; 4152 4153 unsigned Rn = fieldFromInstruction(Val, 8, 4); 4154 unsigned imm = fieldFromInstruction(Val, 0, 8); 4155 4156 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 4157 return MCDisassembler::Fail; 4158 4159 Inst.addOperand(MCOperand::createImm(imm)); 4160 4161 return S; 4162} 4163 4164static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val, 4165 uint64_t Address, const void *Decoder) { 4166 int imm = Val & 0xFF; 4167 if (Val == 0) 4168 imm = INT32_MIN; 4169 else if (!(Val & 0x100)) 4170 imm *= -1; 4171 Inst.addOperand(MCOperand::createImm(imm)); 4172 4173 return MCDisassembler::Success; 4174} 4175 4176template<int shift> 4177static DecodeStatus DecodeT2Imm7(MCInst &Inst, unsigned Val, 4178 uint64_t Address, const void *Decoder) { 4179 int imm = Val & 0x7F; 4180 if (Val == 0) 4181 imm = INT32_MIN; 4182 else if (!(Val & 0x80)) 4183 imm *= -1; 4184 if (imm != INT32_MIN) 4185 imm *= (1U << shift); 4186 Inst.addOperand(MCOperand::createImm(imm)); 4187 4188 return MCDisassembler::Success; 4189} 4190 4191static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val, 4192 uint64_t Address, const void *Decoder) { 4193 DecodeStatus S = MCDisassembler::Success; 4194 4195 unsigned Rn = fieldFromInstruction(Val, 9, 4); 4196 unsigned imm = fieldFromInstruction(Val, 0, 9); 4197 4198 // Thumb stores cannot use PC as dest register. 4199 switch (Inst.getOpcode()) { 4200 case ARM::t2STRT: 4201 case ARM::t2STRBT: 4202 case ARM::t2STRHT: 4203 case ARM::t2STRi8: 4204 case ARM::t2STRHi8: 4205 case ARM::t2STRBi8: 4206 if (Rn == 15) 4207 return MCDisassembler::Fail; 4208 break; 4209 default: 4210 break; 4211 } 4212 4213 // Some instructions always use an additive offset. 4214 switch (Inst.getOpcode()) { 4215 case ARM::t2LDRT: 4216 case ARM::t2LDRBT: 4217 case ARM::t2LDRHT: 4218 case ARM::t2LDRSBT: 4219 case ARM::t2LDRSHT: 4220 case ARM::t2STRT: 4221 case ARM::t2STRBT: 4222 case ARM::t2STRHT: 4223 imm |= 0x100; 4224 break; 4225 default: 4226 break; 4227 } 4228 4229 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4230 return MCDisassembler::Fail; 4231 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder))) 4232 return MCDisassembler::Fail; 4233 4234 return S; 4235} 4236 4237template<int shift> 4238static DecodeStatus DecodeTAddrModeImm7(MCInst &Inst, unsigned Val, 4239 uint64_t Address, 4240 const void *Decoder) { 4241 DecodeStatus S = MCDisassembler::Success; 4242 4243 unsigned Rn = fieldFromInstruction(Val, 8, 3); 4244 unsigned imm = fieldFromInstruction(Val, 0, 8); 4245 4246 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder))) 4247 return MCDisassembler::Fail; 4248 if (!Check(S, DecodeT2Imm7<shift>(Inst, imm, Address, Decoder))) 4249 return MCDisassembler::Fail; 4250 4251 return S; 4252} 4253 4254template<int shift, int WriteBack> 4255static DecodeStatus DecodeT2AddrModeImm7(MCInst &Inst, unsigned Val, 4256 uint64_t Address, 4257 const void *Decoder) { 4258 DecodeStatus S = MCDisassembler::Success; 4259 4260 unsigned Rn = fieldFromInstruction(Val, 8, 4); 4261 unsigned imm = fieldFromInstruction(Val, 0, 8); 4262 if (WriteBack) { 4263 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder))) 4264 return MCDisassembler::Fail; 4265 } else if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 4266 return MCDisassembler::Fail; 4267 if (!Check(S, DecodeT2Imm7<shift>(Inst, imm, Address, Decoder))) 4268 return MCDisassembler::Fail; 4269 4270 return S; 4271} 4272 4273static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn, 4274 uint64_t Address, const void *Decoder) { 4275 DecodeStatus S = MCDisassembler::Success; 4276 4277 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 4278 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4279 unsigned addr = fieldFromInstruction(Insn, 0, 8); 4280 addr |= fieldFromInstruction(Insn, 9, 1) << 8; 4281 addr |= Rn << 9; 4282 unsigned load = fieldFromInstruction(Insn, 20, 1); 4283 4284 if (Rn == 15) { 4285 switch (Inst.getOpcode()) { 4286 case ARM::t2LDR_PRE: 4287 case ARM::t2LDR_POST: 4288 Inst.setOpcode(ARM::t2LDRpci); 4289 break; 4290 case ARM::t2LDRB_PRE: 4291 case ARM::t2LDRB_POST: 4292 Inst.setOpcode(ARM::t2LDRBpci); 4293 break; 4294 case ARM::t2LDRH_PRE: 4295 case ARM::t2LDRH_POST: 4296 Inst.setOpcode(ARM::t2LDRHpci); 4297 break; 4298 case ARM::t2LDRSB_PRE: 4299 case ARM::t2LDRSB_POST: 4300 if (Rt == 15) 4301 Inst.setOpcode(ARM::t2PLIpci); 4302 else 4303 Inst.setOpcode(ARM::t2LDRSBpci); 4304 break; 4305 case ARM::t2LDRSH_PRE: 4306 case ARM::t2LDRSH_POST: 4307 Inst.setOpcode(ARM::t2LDRSHpci); 4308 break; 4309 default: 4310 return MCDisassembler::Fail; 4311 } 4312 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); 4313 } 4314 4315 if (!load) { 4316 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4317 return MCDisassembler::Fail; 4318 } 4319 4320 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 4321 return MCDisassembler::Fail; 4322 4323 if (load) { 4324 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4325 return MCDisassembler::Fail; 4326 } 4327 4328 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder))) 4329 return MCDisassembler::Fail; 4330 4331 return S; 4332} 4333 4334static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val, 4335 uint64_t Address, const void *Decoder) { 4336 DecodeStatus S = MCDisassembler::Success; 4337 4338 unsigned Rn = fieldFromInstruction(Val, 13, 4); 4339 unsigned imm = fieldFromInstruction(Val, 0, 12); 4340 4341 // Thumb stores cannot use PC as dest register. 4342 switch (Inst.getOpcode()) { 4343 case ARM::t2STRi12: 4344 case ARM::t2STRBi12: 4345 case ARM::t2STRHi12: 4346 if (Rn == 15) 4347 return MCDisassembler::Fail; 4348 break; 4349 default: 4350 break; 4351 } 4352 4353 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4354 return MCDisassembler::Fail; 4355 Inst.addOperand(MCOperand::createImm(imm)); 4356 4357 return S; 4358} 4359 4360static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn, 4361 uint64_t Address, const void *Decoder) { 4362 unsigned imm = fieldFromInstruction(Insn, 0, 7); 4363 4364 Inst.addOperand(MCOperand::createReg(ARM::SP)); 4365 Inst.addOperand(MCOperand::createReg(ARM::SP)); 4366 Inst.addOperand(MCOperand::createImm(imm)); 4367 4368 return MCDisassembler::Success; 4369} 4370 4371static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn, 4372 uint64_t Address, const void *Decoder) { 4373 DecodeStatus S = MCDisassembler::Success; 4374 4375 if (Inst.getOpcode() == ARM::tADDrSP) { 4376 unsigned Rdm = fieldFromInstruction(Insn, 0, 3); 4377 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3; 4378 4379 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder))) 4380 return MCDisassembler::Fail; 4381 Inst.addOperand(MCOperand::createReg(ARM::SP)); 4382 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder))) 4383 return MCDisassembler::Fail; 4384 } else if (Inst.getOpcode() == ARM::tADDspr) { 4385 unsigned Rm = fieldFromInstruction(Insn, 3, 4); 4386 4387 Inst.addOperand(MCOperand::createReg(ARM::SP)); 4388 Inst.addOperand(MCOperand::createReg(ARM::SP)); 4389 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 4390 return MCDisassembler::Fail; 4391 } 4392 4393 return S; 4394} 4395 4396static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn, 4397 uint64_t Address, const void *Decoder) { 4398 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2; 4399 unsigned flags = fieldFromInstruction(Insn, 0, 3); 4400 4401 Inst.addOperand(MCOperand::createImm(imod)); 4402 Inst.addOperand(MCOperand::createImm(flags)); 4403 4404 return MCDisassembler::Success; 4405} 4406 4407static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn, 4408 uint64_t Address, const void *Decoder) { 4409 DecodeStatus S = MCDisassembler::Success; 4410 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 4411 unsigned add = fieldFromInstruction(Insn, 4, 1); 4412 4413 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder))) 4414 return MCDisassembler::Fail; 4415 Inst.addOperand(MCOperand::createImm(add)); 4416 4417 return S; 4418} 4419 4420static DecodeStatus DecodeMveAddrModeRQ(MCInst &Inst, unsigned Insn, 4421 uint64_t Address, const void *Decoder) { 4422 DecodeStatus S = MCDisassembler::Success; 4423 unsigned Rn = fieldFromInstruction(Insn, 3, 4); 4424 unsigned Qm = fieldFromInstruction(Insn, 0, 3); 4425 4426 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 4427 return MCDisassembler::Fail; 4428 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qm, Address, Decoder))) 4429 return MCDisassembler::Fail; 4430 4431 return S; 4432} 4433 4434template<int shift> 4435static DecodeStatus DecodeMveAddrModeQ(MCInst &Inst, unsigned Insn, 4436 uint64_t Address, const void *Decoder) { 4437 DecodeStatus S = MCDisassembler::Success; 4438 unsigned Qm = fieldFromInstruction(Insn, 8, 3); 4439 int imm = fieldFromInstruction(Insn, 0, 7); 4440 4441 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qm, Address, Decoder))) 4442 return MCDisassembler::Fail; 4443 4444 if(!fieldFromInstruction(Insn, 7, 1)) { 4445 if (imm == 0) 4446 imm = INT32_MIN; // indicate -0 4447 else 4448 imm *= -1; 4449 } 4450 if (imm != INT32_MIN) 4451 imm *= (1U << shift); 4452 Inst.addOperand(MCOperand::createImm(imm)); 4453 4454 return S; 4455} 4456 4457static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val, 4458 uint64_t Address, const void *Decoder) { 4459 // Val is passed in as S:J1:J2:imm10H:imm10L:'0' 4460 // Note only one trailing zero not two. Also the J1 and J2 values are from 4461 // the encoded instruction. So here change to I1 and I2 values via: 4462 // I1 = NOT(J1 EOR S); 4463 // I2 = NOT(J2 EOR S); 4464 // and build the imm32 with two trailing zeros as documented: 4465 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32); 4466 unsigned S = (Val >> 23) & 1; 4467 unsigned J1 = (Val >> 22) & 1; 4468 unsigned J2 = (Val >> 21) & 1; 4469 unsigned I1 = !(J1 ^ S); 4470 unsigned I2 = !(J2 ^ S); 4471 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21); 4472 int imm32 = SignExtend32<25>(tmp << 1); 4473 4474 if (!tryAddingSymbolicOperand(Address, 4475 (Address & ~2u) + imm32 + 4, 4476 true, 4, Inst, Decoder)) 4477 Inst.addOperand(MCOperand::createImm(imm32)); 4478 return MCDisassembler::Success; 4479} 4480 4481static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val, 4482 uint64_t Address, const void *Decoder) { 4483 if (Val == 0xA || Val == 0xB) 4484 return MCDisassembler::Fail; 4485 4486 const FeatureBitset &featureBits = 4487 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits(); 4488 4489 if (!isValidCoprocessorNumber(Val, featureBits)) 4490 return MCDisassembler::Fail; 4491 4492 Inst.addOperand(MCOperand::createImm(Val)); 4493 return MCDisassembler::Success; 4494} 4495 4496static DecodeStatus 4497DecodeThumbTableBranch(MCInst &Inst, unsigned Insn, 4498 uint64_t Address, const void *Decoder) { 4499 DecodeStatus S = MCDisassembler::Success; 4500 4501 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4502 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 4503 4504 if (Rn == ARM::SP) S = MCDisassembler::SoftFail; 4505 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4506 return MCDisassembler::Fail; 4507 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))) 4508 return MCDisassembler::Fail; 4509 return S; 4510} 4511 4512static DecodeStatus 4513DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn, 4514 uint64_t Address, const void *Decoder) { 4515 DecodeStatus S = MCDisassembler::Success; 4516 4517 unsigned pred = fieldFromInstruction(Insn, 22, 4); 4518 if (pred == 0xE || pred == 0xF) { 4519 unsigned opc = fieldFromInstruction(Insn, 4, 28); 4520 switch (opc) { 4521 default: 4522 return MCDisassembler::Fail; 4523 case 0xf3bf8f4: 4524 Inst.setOpcode(ARM::t2DSB); 4525 break; 4526 case 0xf3bf8f5: 4527 Inst.setOpcode(ARM::t2DMB); 4528 break; 4529 case 0xf3bf8f6: 4530 Inst.setOpcode(ARM::t2ISB); 4531 break; 4532 } 4533 4534 unsigned imm = fieldFromInstruction(Insn, 0, 4); 4535 return DecodeMemBarrierOption(Inst, imm, Address, Decoder); 4536 } 4537 4538 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1; 4539 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19; 4540 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18; 4541 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12; 4542 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20; 4543 4544 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder))) 4545 return MCDisassembler::Fail; 4546 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 4547 return MCDisassembler::Fail; 4548 4549 return S; 4550} 4551 4552// Decode a shifted immediate operand. These basically consist 4553// of an 8-bit value, and a 4-bit directive that specifies either 4554// a splat operation or a rotation. 4555static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val, 4556 uint64_t Address, const void *Decoder) { 4557 unsigned ctrl = fieldFromInstruction(Val, 10, 2); 4558 if (ctrl == 0) { 4559 unsigned byte = fieldFromInstruction(Val, 8, 2); 4560 unsigned imm = fieldFromInstruction(Val, 0, 8); 4561 switch (byte) { 4562 case 0: 4563 Inst.addOperand(MCOperand::createImm(imm)); 4564 break; 4565 case 1: 4566 Inst.addOperand(MCOperand::createImm((imm << 16) | imm)); 4567 break; 4568 case 2: 4569 Inst.addOperand(MCOperand::createImm((imm << 24) | (imm << 8))); 4570 break; 4571 case 3: 4572 Inst.addOperand(MCOperand::createImm((imm << 24) | (imm << 16) | 4573 (imm << 8) | imm)); 4574 break; 4575 } 4576 } else { 4577 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80; 4578 unsigned rot = fieldFromInstruction(Val, 7, 5); 4579 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31)); 4580 Inst.addOperand(MCOperand::createImm(imm)); 4581 } 4582 4583 return MCDisassembler::Success; 4584} 4585 4586static DecodeStatus 4587DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val, 4588 uint64_t Address, const void *Decoder) { 4589 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4, 4590 true, 2, Inst, Decoder)) 4591 Inst.addOperand(MCOperand::createImm(SignExtend32<9>(Val << 1))); 4592 return MCDisassembler::Success; 4593} 4594 4595static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val, 4596 uint64_t Address, 4597 const void *Decoder) { 4598 // Val is passed in as S:J1:J2:imm10:imm11 4599 // Note no trailing zero after imm11. Also the J1 and J2 values are from 4600 // the encoded instruction. So here change to I1 and I2 values via: 4601 // I1 = NOT(J1 EOR S); 4602 // I2 = NOT(J2 EOR S); 4603 // and build the imm32 with one trailing zero as documented: 4604 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32); 4605 unsigned S = (Val >> 23) & 1; 4606 unsigned J1 = (Val >> 22) & 1; 4607 unsigned J2 = (Val >> 21) & 1; 4608 unsigned I1 = !(J1 ^ S); 4609 unsigned I2 = !(J2 ^ S); 4610 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21); 4611 int imm32 = SignExtend32<25>(tmp << 1); 4612 4613 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4, 4614 true, 4, Inst, Decoder)) 4615 Inst.addOperand(MCOperand::createImm(imm32)); 4616 return MCDisassembler::Success; 4617} 4618 4619static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val, 4620 uint64_t Address, const void *Decoder) { 4621 if (Val & ~0xf) 4622 return MCDisassembler::Fail; 4623 4624 Inst.addOperand(MCOperand::createImm(Val)); 4625 return MCDisassembler::Success; 4626} 4627 4628static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val, 4629 uint64_t Address, const void *Decoder) { 4630 if (Val & ~0xf) 4631 return MCDisassembler::Fail; 4632 4633 Inst.addOperand(MCOperand::createImm(Val)); 4634 return MCDisassembler::Success; 4635} 4636 4637static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val, 4638 uint64_t Address, const void *Decoder) { 4639 DecodeStatus S = MCDisassembler::Success; 4640 const FeatureBitset &FeatureBits = 4641 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits(); 4642 4643 if (FeatureBits[ARM::FeatureMClass]) { 4644 unsigned ValLow = Val & 0xff; 4645 4646 // Validate the SYSm value first. 4647 switch (ValLow) { 4648 case 0: // apsr 4649 case 1: // iapsr 4650 case 2: // eapsr 4651 case 3: // xpsr 4652 case 5: // ipsr 4653 case 6: // epsr 4654 case 7: // iepsr 4655 case 8: // msp 4656 case 9: // psp 4657 case 16: // primask 4658 case 20: // control 4659 break; 4660 case 17: // basepri 4661 case 18: // basepri_max 4662 case 19: // faultmask 4663 if (!(FeatureBits[ARM::HasV7Ops])) 4664 // Values basepri, basepri_max and faultmask are only valid for v7m. 4665 return MCDisassembler::Fail; 4666 break; 4667 case 0x8a: // msplim_ns 4668 case 0x8b: // psplim_ns 4669 case 0x91: // basepri_ns 4670 case 0x93: // faultmask_ns 4671 if (!(FeatureBits[ARM::HasV8MMainlineOps])) 4672 return MCDisassembler::Fail; 4673 LLVM_FALLTHROUGH; 4674 case 10: // msplim 4675 case 11: // psplim 4676 case 0x88: // msp_ns 4677 case 0x89: // psp_ns 4678 case 0x90: // primask_ns 4679 case 0x94: // control_ns 4680 case 0x98: // sp_ns 4681 if (!(FeatureBits[ARM::Feature8MSecExt])) 4682 return MCDisassembler::Fail; 4683 break; 4684 default: 4685 // Architecturally defined as unpredictable 4686 S = MCDisassembler::SoftFail; 4687 break; 4688 } 4689 4690 if (Inst.getOpcode() == ARM::t2MSR_M) { 4691 unsigned Mask = fieldFromInstruction(Val, 10, 2); 4692 if (!(FeatureBits[ARM::HasV7Ops])) { 4693 // The ARMv6-M MSR bits {11-10} can be only 0b10, other values are 4694 // unpredictable. 4695 if (Mask != 2) 4696 S = MCDisassembler::SoftFail; 4697 } 4698 else { 4699 // The ARMv7-M architecture stores an additional 2-bit mask value in 4700 // MSR bits {11-10}. The mask is used only with apsr, iapsr, eapsr and 4701 // xpsr, it has to be 0b10 in other cases. Bit mask{1} indicates if 4702 // the NZCVQ bits should be moved by the instruction. Bit mask{0} 4703 // indicates the move for the GE{3:0} bits, the mask{0} bit can be set 4704 // only if the processor includes the DSP extension. 4705 if (Mask == 0 || (Mask != 2 && ValLow > 3) || 4706 (!(FeatureBits[ARM::FeatureDSP]) && (Mask & 1))) 4707 S = MCDisassembler::SoftFail; 4708 } 4709 } 4710 } else { 4711 // A/R class 4712 if (Val == 0) 4713 return MCDisassembler::Fail; 4714 } 4715 Inst.addOperand(MCOperand::createImm(Val)); 4716 return S; 4717} 4718 4719static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Val, 4720 uint64_t Address, const void *Decoder) { 4721 unsigned R = fieldFromInstruction(Val, 5, 1); 4722 unsigned SysM = fieldFromInstruction(Val, 0, 5); 4723 4724 // The table of encodings for these banked registers comes from B9.2.3 of the 4725 // ARM ARM. There are patterns, but nothing regular enough to make this logic 4726 // neater. So by fiat, these values are UNPREDICTABLE: 4727 if (!ARMBankedReg::lookupBankedRegByEncoding((R << 5) | SysM)) 4728 return MCDisassembler::Fail; 4729 4730 Inst.addOperand(MCOperand::createImm(Val)); 4731 return MCDisassembler::Success; 4732} 4733 4734static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn, 4735 uint64_t Address, const void *Decoder) { 4736 DecodeStatus S = MCDisassembler::Success; 4737 4738 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 4739 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4740 unsigned pred = fieldFromInstruction(Insn, 28, 4); 4741 4742 if (Rn == 0xF) 4743 S = MCDisassembler::SoftFail; 4744 4745 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder))) 4746 return MCDisassembler::Fail; 4747 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4748 return MCDisassembler::Fail; 4749 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 4750 return MCDisassembler::Fail; 4751 4752 return S; 4753} 4754 4755static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn, 4756 uint64_t Address, 4757 const void *Decoder) { 4758 DecodeStatus S = MCDisassembler::Success; 4759 4760 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 4761 unsigned Rt = fieldFromInstruction(Insn, 0, 4); 4762 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4763 unsigned pred = fieldFromInstruction(Insn, 28, 4); 4764 4765 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder))) 4766 return MCDisassembler::Fail; 4767 4768 if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1) 4769 S = MCDisassembler::SoftFail; 4770 4771 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder))) 4772 return MCDisassembler::Fail; 4773 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4774 return MCDisassembler::Fail; 4775 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 4776 return MCDisassembler::Fail; 4777 4778 return S; 4779} 4780 4781static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn, 4782 uint64_t Address, const void *Decoder) { 4783 DecodeStatus S = MCDisassembler::Success; 4784 4785 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4786 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 4787 unsigned imm = fieldFromInstruction(Insn, 0, 12); 4788 imm |= fieldFromInstruction(Insn, 16, 4) << 13; 4789 imm |= fieldFromInstruction(Insn, 23, 1) << 12; 4790 unsigned pred = fieldFromInstruction(Insn, 28, 4); 4791 4792 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; 4793 4794 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 4795 return MCDisassembler::Fail; 4796 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4797 return MCDisassembler::Fail; 4798 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder))) 4799 return MCDisassembler::Fail; 4800 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 4801 return MCDisassembler::Fail; 4802 4803 return S; 4804} 4805 4806static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn, 4807 uint64_t Address, const void *Decoder) { 4808 DecodeStatus S = MCDisassembler::Success; 4809 4810 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4811 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 4812 unsigned imm = fieldFromInstruction(Insn, 0, 12); 4813 imm |= fieldFromInstruction(Insn, 16, 4) << 13; 4814 imm |= fieldFromInstruction(Insn, 23, 1) << 12; 4815 unsigned pred = fieldFromInstruction(Insn, 28, 4); 4816 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 4817 4818 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; 4819 if (Rm == 0xF) S = MCDisassembler::SoftFail; 4820 4821 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 4822 return MCDisassembler::Fail; 4823 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4824 return MCDisassembler::Fail; 4825 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder))) 4826 return MCDisassembler::Fail; 4827 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 4828 return MCDisassembler::Fail; 4829 4830 return S; 4831} 4832 4833static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn, 4834 uint64_t Address, const void *Decoder) { 4835 DecodeStatus S = MCDisassembler::Success; 4836 4837 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4838 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 4839 unsigned imm = fieldFromInstruction(Insn, 0, 12); 4840 imm |= fieldFromInstruction(Insn, 16, 4) << 13; 4841 imm |= fieldFromInstruction(Insn, 23, 1) << 12; 4842 unsigned pred = fieldFromInstruction(Insn, 28, 4); 4843 4844 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; 4845 4846 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4847 return MCDisassembler::Fail; 4848 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 4849 return MCDisassembler::Fail; 4850 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder))) 4851 return MCDisassembler::Fail; 4852 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 4853 return MCDisassembler::Fail; 4854 4855 return S; 4856} 4857 4858static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn, 4859 uint64_t Address, const void *Decoder) { 4860 DecodeStatus S = MCDisassembler::Success; 4861 4862 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4863 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 4864 unsigned imm = fieldFromInstruction(Insn, 0, 12); 4865 imm |= fieldFromInstruction(Insn, 16, 4) << 13; 4866 imm |= fieldFromInstruction(Insn, 23, 1) << 12; 4867 unsigned pred = fieldFromInstruction(Insn, 28, 4); 4868 4869 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; 4870 4871 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4872 return MCDisassembler::Fail; 4873 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 4874 return MCDisassembler::Fail; 4875 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder))) 4876 return MCDisassembler::Fail; 4877 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 4878 return MCDisassembler::Fail; 4879 4880 return S; 4881} 4882 4883static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn, 4884 uint64_t Address, const void *Decoder) { 4885 DecodeStatus S = MCDisassembler::Success; 4886 4887 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4888 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 4889 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 4890 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 4891 unsigned size = fieldFromInstruction(Insn, 10, 2); 4892 4893 unsigned align = 0; 4894 unsigned index = 0; 4895 switch (size) { 4896 default: 4897 return MCDisassembler::Fail; 4898 case 0: 4899 if (fieldFromInstruction(Insn, 4, 1)) 4900 return MCDisassembler::Fail; // UNDEFINED 4901 index = fieldFromInstruction(Insn, 5, 3); 4902 break; 4903 case 1: 4904 if (fieldFromInstruction(Insn, 5, 1)) 4905 return MCDisassembler::Fail; // UNDEFINED 4906 index = fieldFromInstruction(Insn, 6, 2); 4907 if (fieldFromInstruction(Insn, 4, 1)) 4908 align = 2; 4909 break; 4910 case 2: 4911 if (fieldFromInstruction(Insn, 6, 1)) 4912 return MCDisassembler::Fail; // UNDEFINED 4913 index = fieldFromInstruction(Insn, 7, 1); 4914 4915 switch (fieldFromInstruction(Insn, 4, 2)) { 4916 case 0 : 4917 align = 0; break; 4918 case 3: 4919 align = 4; break; 4920 default: 4921 return MCDisassembler::Fail; 4922 } 4923 break; 4924 } 4925 4926 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 4927 return MCDisassembler::Fail; 4928 if (Rm != 0xF) { // Writeback 4929 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4930 return MCDisassembler::Fail; 4931 } 4932 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4933 return MCDisassembler::Fail; 4934 Inst.addOperand(MCOperand::createImm(align)); 4935 if (Rm != 0xF) { 4936 if (Rm != 0xD) { 4937 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 4938 return MCDisassembler::Fail; 4939 } else 4940 Inst.addOperand(MCOperand::createReg(0)); 4941 } 4942 4943 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 4944 return MCDisassembler::Fail; 4945 Inst.addOperand(MCOperand::createImm(index)); 4946 4947 return S; 4948} 4949 4950static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn, 4951 uint64_t Address, const void *Decoder) { 4952 DecodeStatus S = MCDisassembler::Success; 4953 4954 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 4955 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 4956 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 4957 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 4958 unsigned size = fieldFromInstruction(Insn, 10, 2); 4959 4960 unsigned align = 0; 4961 unsigned index = 0; 4962 switch (size) { 4963 default: 4964 return MCDisassembler::Fail; 4965 case 0: 4966 if (fieldFromInstruction(Insn, 4, 1)) 4967 return MCDisassembler::Fail; // UNDEFINED 4968 index = fieldFromInstruction(Insn, 5, 3); 4969 break; 4970 case 1: 4971 if (fieldFromInstruction(Insn, 5, 1)) 4972 return MCDisassembler::Fail; // UNDEFINED 4973 index = fieldFromInstruction(Insn, 6, 2); 4974 if (fieldFromInstruction(Insn, 4, 1)) 4975 align = 2; 4976 break; 4977 case 2: 4978 if (fieldFromInstruction(Insn, 6, 1)) 4979 return MCDisassembler::Fail; // UNDEFINED 4980 index = fieldFromInstruction(Insn, 7, 1); 4981 4982 switch (fieldFromInstruction(Insn, 4, 2)) { 4983 case 0: 4984 align = 0; break; 4985 case 3: 4986 align = 4; break; 4987 default: 4988 return MCDisassembler::Fail; 4989 } 4990 break; 4991 } 4992 4993 if (Rm != 0xF) { // Writeback 4994 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4995 return MCDisassembler::Fail; 4996 } 4997 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 4998 return MCDisassembler::Fail; 4999 Inst.addOperand(MCOperand::createImm(align)); 5000 if (Rm != 0xF) { 5001 if (Rm != 0xD) { 5002 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 5003 return MCDisassembler::Fail; 5004 } else 5005 Inst.addOperand(MCOperand::createReg(0)); 5006 } 5007 5008 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5009 return MCDisassembler::Fail; 5010 Inst.addOperand(MCOperand::createImm(index)); 5011 5012 return S; 5013} 5014 5015static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn, 5016 uint64_t Address, const void *Decoder) { 5017 DecodeStatus S = MCDisassembler::Success; 5018 5019 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5020 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 5021 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 5022 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 5023 unsigned size = fieldFromInstruction(Insn, 10, 2); 5024 5025 unsigned align = 0; 5026 unsigned index = 0; 5027 unsigned inc = 1; 5028 switch (size) { 5029 default: 5030 return MCDisassembler::Fail; 5031 case 0: 5032 index = fieldFromInstruction(Insn, 5, 3); 5033 if (fieldFromInstruction(Insn, 4, 1)) 5034 align = 2; 5035 break; 5036 case 1: 5037 index = fieldFromInstruction(Insn, 6, 2); 5038 if (fieldFromInstruction(Insn, 4, 1)) 5039 align = 4; 5040 if (fieldFromInstruction(Insn, 5, 1)) 5041 inc = 2; 5042 break; 5043 case 2: 5044 if (fieldFromInstruction(Insn, 5, 1)) 5045 return MCDisassembler::Fail; // UNDEFINED 5046 index = fieldFromInstruction(Insn, 7, 1); 5047 if (fieldFromInstruction(Insn, 4, 1) != 0) 5048 align = 8; 5049 if (fieldFromInstruction(Insn, 6, 1)) 5050 inc = 2; 5051 break; 5052 } 5053 5054 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5055 return MCDisassembler::Fail; 5056 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 5057 return MCDisassembler::Fail; 5058 if (Rm != 0xF) { // Writeback 5059 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5060 return MCDisassembler::Fail; 5061 } 5062 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5063 return MCDisassembler::Fail; 5064 Inst.addOperand(MCOperand::createImm(align)); 5065 if (Rm != 0xF) { 5066 if (Rm != 0xD) { 5067 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 5068 return MCDisassembler::Fail; 5069 } else 5070 Inst.addOperand(MCOperand::createReg(0)); 5071 } 5072 5073 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5074 return MCDisassembler::Fail; 5075 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 5076 return MCDisassembler::Fail; 5077 Inst.addOperand(MCOperand::createImm(index)); 5078 5079 return S; 5080} 5081 5082static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn, 5083 uint64_t Address, const void *Decoder) { 5084 DecodeStatus S = MCDisassembler::Success; 5085 5086 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5087 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 5088 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 5089 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 5090 unsigned size = fieldFromInstruction(Insn, 10, 2); 5091 5092 unsigned align = 0; 5093 unsigned index = 0; 5094 unsigned inc = 1; 5095 switch (size) { 5096 default: 5097 return MCDisassembler::Fail; 5098 case 0: 5099 index = fieldFromInstruction(Insn, 5, 3); 5100 if (fieldFromInstruction(Insn, 4, 1)) 5101 align = 2; 5102 break; 5103 case 1: 5104 index = fieldFromInstruction(Insn, 6, 2); 5105 if (fieldFromInstruction(Insn, 4, 1)) 5106 align = 4; 5107 if (fieldFromInstruction(Insn, 5, 1)) 5108 inc = 2; 5109 break; 5110 case 2: 5111 if (fieldFromInstruction(Insn, 5, 1)) 5112 return MCDisassembler::Fail; // UNDEFINED 5113 index = fieldFromInstruction(Insn, 7, 1); 5114 if (fieldFromInstruction(Insn, 4, 1) != 0) 5115 align = 8; 5116 if (fieldFromInstruction(Insn, 6, 1)) 5117 inc = 2; 5118 break; 5119 } 5120 5121 if (Rm != 0xF) { // Writeback 5122 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5123 return MCDisassembler::Fail; 5124 } 5125 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5126 return MCDisassembler::Fail; 5127 Inst.addOperand(MCOperand::createImm(align)); 5128 if (Rm != 0xF) { 5129 if (Rm != 0xD) { 5130 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 5131 return MCDisassembler::Fail; 5132 } else 5133 Inst.addOperand(MCOperand::createReg(0)); 5134 } 5135 5136 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5137 return MCDisassembler::Fail; 5138 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 5139 return MCDisassembler::Fail; 5140 Inst.addOperand(MCOperand::createImm(index)); 5141 5142 return S; 5143} 5144 5145static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn, 5146 uint64_t Address, const void *Decoder) { 5147 DecodeStatus S = MCDisassembler::Success; 5148 5149 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5150 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 5151 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 5152 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 5153 unsigned size = fieldFromInstruction(Insn, 10, 2); 5154 5155 unsigned align = 0; 5156 unsigned index = 0; 5157 unsigned inc = 1; 5158 switch (size) { 5159 default: 5160 return MCDisassembler::Fail; 5161 case 0: 5162 if (fieldFromInstruction(Insn, 4, 1)) 5163 return MCDisassembler::Fail; // UNDEFINED 5164 index = fieldFromInstruction(Insn, 5, 3); 5165 break; 5166 case 1: 5167 if (fieldFromInstruction(Insn, 4, 1)) 5168 return MCDisassembler::Fail; // UNDEFINED 5169 index = fieldFromInstruction(Insn, 6, 2); 5170 if (fieldFromInstruction(Insn, 5, 1)) 5171 inc = 2; 5172 break; 5173 case 2: 5174 if (fieldFromInstruction(Insn, 4, 2)) 5175 return MCDisassembler::Fail; // UNDEFINED 5176 index = fieldFromInstruction(Insn, 7, 1); 5177 if (fieldFromInstruction(Insn, 6, 1)) 5178 inc = 2; 5179 break; 5180 } 5181 5182 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5183 return MCDisassembler::Fail; 5184 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 5185 return MCDisassembler::Fail; 5186 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 5187 return MCDisassembler::Fail; 5188 5189 if (Rm != 0xF) { // Writeback 5190 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5191 return MCDisassembler::Fail; 5192 } 5193 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5194 return MCDisassembler::Fail; 5195 Inst.addOperand(MCOperand::createImm(align)); 5196 if (Rm != 0xF) { 5197 if (Rm != 0xD) { 5198 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 5199 return MCDisassembler::Fail; 5200 } else 5201 Inst.addOperand(MCOperand::createReg(0)); 5202 } 5203 5204 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5205 return MCDisassembler::Fail; 5206 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 5207 return MCDisassembler::Fail; 5208 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 5209 return MCDisassembler::Fail; 5210 Inst.addOperand(MCOperand::createImm(index)); 5211 5212 return S; 5213} 5214 5215static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn, 5216 uint64_t Address, const void *Decoder) { 5217 DecodeStatus S = MCDisassembler::Success; 5218 5219 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5220 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 5221 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 5222 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 5223 unsigned size = fieldFromInstruction(Insn, 10, 2); 5224 5225 unsigned align = 0; 5226 unsigned index = 0; 5227 unsigned inc = 1; 5228 switch (size) { 5229 default: 5230 return MCDisassembler::Fail; 5231 case 0: 5232 if (fieldFromInstruction(Insn, 4, 1)) 5233 return MCDisassembler::Fail; // UNDEFINED 5234 index = fieldFromInstruction(Insn, 5, 3); 5235 break; 5236 case 1: 5237 if (fieldFromInstruction(Insn, 4, 1)) 5238 return MCDisassembler::Fail; // UNDEFINED 5239 index = fieldFromInstruction(Insn, 6, 2); 5240 if (fieldFromInstruction(Insn, 5, 1)) 5241 inc = 2; 5242 break; 5243 case 2: 5244 if (fieldFromInstruction(Insn, 4, 2)) 5245 return MCDisassembler::Fail; // UNDEFINED 5246 index = fieldFromInstruction(Insn, 7, 1); 5247 if (fieldFromInstruction(Insn, 6, 1)) 5248 inc = 2; 5249 break; 5250 } 5251 5252 if (Rm != 0xF) { // Writeback 5253 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5254 return MCDisassembler::Fail; 5255 } 5256 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5257 return MCDisassembler::Fail; 5258 Inst.addOperand(MCOperand::createImm(align)); 5259 if (Rm != 0xF) { 5260 if (Rm != 0xD) { 5261 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 5262 return MCDisassembler::Fail; 5263 } else 5264 Inst.addOperand(MCOperand::createReg(0)); 5265 } 5266 5267 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5268 return MCDisassembler::Fail; 5269 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 5270 return MCDisassembler::Fail; 5271 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 5272 return MCDisassembler::Fail; 5273 Inst.addOperand(MCOperand::createImm(index)); 5274 5275 return S; 5276} 5277 5278static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn, 5279 uint64_t Address, const void *Decoder) { 5280 DecodeStatus S = MCDisassembler::Success; 5281 5282 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5283 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 5284 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 5285 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 5286 unsigned size = fieldFromInstruction(Insn, 10, 2); 5287 5288 unsigned align = 0; 5289 unsigned index = 0; 5290 unsigned inc = 1; 5291 switch (size) { 5292 default: 5293 return MCDisassembler::Fail; 5294 case 0: 5295 if (fieldFromInstruction(Insn, 4, 1)) 5296 align = 4; 5297 index = fieldFromInstruction(Insn, 5, 3); 5298 break; 5299 case 1: 5300 if (fieldFromInstruction(Insn, 4, 1)) 5301 align = 8; 5302 index = fieldFromInstruction(Insn, 6, 2); 5303 if (fieldFromInstruction(Insn, 5, 1)) 5304 inc = 2; 5305 break; 5306 case 2: 5307 switch (fieldFromInstruction(Insn, 4, 2)) { 5308 case 0: 5309 align = 0; break; 5310 case 3: 5311 return MCDisassembler::Fail; 5312 default: 5313 align = 4 << fieldFromInstruction(Insn, 4, 2); break; 5314 } 5315 5316 index = fieldFromInstruction(Insn, 7, 1); 5317 if (fieldFromInstruction(Insn, 6, 1)) 5318 inc = 2; 5319 break; 5320 } 5321 5322 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5323 return MCDisassembler::Fail; 5324 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 5325 return MCDisassembler::Fail; 5326 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 5327 return MCDisassembler::Fail; 5328 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder))) 5329 return MCDisassembler::Fail; 5330 5331 if (Rm != 0xF) { // Writeback 5332 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5333 return MCDisassembler::Fail; 5334 } 5335 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5336 return MCDisassembler::Fail; 5337 Inst.addOperand(MCOperand::createImm(align)); 5338 if (Rm != 0xF) { 5339 if (Rm != 0xD) { 5340 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 5341 return MCDisassembler::Fail; 5342 } else 5343 Inst.addOperand(MCOperand::createReg(0)); 5344 } 5345 5346 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5347 return MCDisassembler::Fail; 5348 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 5349 return MCDisassembler::Fail; 5350 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 5351 return MCDisassembler::Fail; 5352 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder))) 5353 return MCDisassembler::Fail; 5354 Inst.addOperand(MCOperand::createImm(index)); 5355 5356 return S; 5357} 5358 5359static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn, 5360 uint64_t Address, const void *Decoder) { 5361 DecodeStatus S = MCDisassembler::Success; 5362 5363 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5364 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 5365 unsigned Rd = fieldFromInstruction(Insn, 12, 4); 5366 Rd |= fieldFromInstruction(Insn, 22, 1) << 4; 5367 unsigned size = fieldFromInstruction(Insn, 10, 2); 5368 5369 unsigned align = 0; 5370 unsigned index = 0; 5371 unsigned inc = 1; 5372 switch (size) { 5373 default: 5374 return MCDisassembler::Fail; 5375 case 0: 5376 if (fieldFromInstruction(Insn, 4, 1)) 5377 align = 4; 5378 index = fieldFromInstruction(Insn, 5, 3); 5379 break; 5380 case 1: 5381 if (fieldFromInstruction(Insn, 4, 1)) 5382 align = 8; 5383 index = fieldFromInstruction(Insn, 6, 2); 5384 if (fieldFromInstruction(Insn, 5, 1)) 5385 inc = 2; 5386 break; 5387 case 2: 5388 switch (fieldFromInstruction(Insn, 4, 2)) { 5389 case 0: 5390 align = 0; break; 5391 case 3: 5392 return MCDisassembler::Fail; 5393 default: 5394 align = 4 << fieldFromInstruction(Insn, 4, 2); break; 5395 } 5396 5397 index = fieldFromInstruction(Insn, 7, 1); 5398 if (fieldFromInstruction(Insn, 6, 1)) 5399 inc = 2; 5400 break; 5401 } 5402 5403 if (Rm != 0xF) { // Writeback 5404 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5405 return MCDisassembler::Fail; 5406 } 5407 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 5408 return MCDisassembler::Fail; 5409 Inst.addOperand(MCOperand::createImm(align)); 5410 if (Rm != 0xF) { 5411 if (Rm != 0xD) { 5412 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 5413 return MCDisassembler::Fail; 5414 } else 5415 Inst.addOperand(MCOperand::createReg(0)); 5416 } 5417 5418 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 5419 return MCDisassembler::Fail; 5420 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 5421 return MCDisassembler::Fail; 5422 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 5423 return MCDisassembler::Fail; 5424 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder))) 5425 return MCDisassembler::Fail; 5426 Inst.addOperand(MCOperand::createImm(index)); 5427 5428 return S; 5429} 5430 5431static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn, 5432 uint64_t Address, const void *Decoder) { 5433 DecodeStatus S = MCDisassembler::Success; 5434 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 5435 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4); 5436 unsigned Rm = fieldFromInstruction(Insn, 5, 1); 5437 unsigned pred = fieldFromInstruction(Insn, 28, 4); 5438 Rm |= fieldFromInstruction(Insn, 0, 4) << 1; 5439 5440 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F) 5441 S = MCDisassembler::SoftFail; 5442 5443 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder))) 5444 return MCDisassembler::Fail; 5445 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder))) 5446 return MCDisassembler::Fail; 5447 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder))) 5448 return MCDisassembler::Fail; 5449 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder))) 5450 return MCDisassembler::Fail; 5451 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 5452 return MCDisassembler::Fail; 5453 5454 return S; 5455} 5456 5457static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn, 5458 uint64_t Address, const void *Decoder) { 5459 DecodeStatus S = MCDisassembler::Success; 5460 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 5461 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4); 5462 unsigned Rm = fieldFromInstruction(Insn, 5, 1); 5463 unsigned pred = fieldFromInstruction(Insn, 28, 4); 5464 Rm |= fieldFromInstruction(Insn, 0, 4) << 1; 5465 5466 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F) 5467 S = MCDisassembler::SoftFail; 5468 5469 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder))) 5470 return MCDisassembler::Fail; 5471 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder))) 5472 return MCDisassembler::Fail; 5473 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder))) 5474 return MCDisassembler::Fail; 5475 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder))) 5476 return MCDisassembler::Fail; 5477 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 5478 return MCDisassembler::Fail; 5479 5480 return S; 5481} 5482 5483static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn, 5484 uint64_t Address, const void *Decoder) { 5485 DecodeStatus S = MCDisassembler::Success; 5486 unsigned pred = fieldFromInstruction(Insn, 4, 4); 5487 unsigned mask = fieldFromInstruction(Insn, 0, 4); 5488 5489 if (pred == 0xF) { 5490 pred = 0xE; 5491 S = MCDisassembler::SoftFail; 5492 } 5493 5494 if (mask == 0x0) 5495 return MCDisassembler::Fail; 5496 5497 // IT masks are encoded as a sequence of replacement low-order bits 5498 // for the condition code. So if the low bit of the starting 5499 // condition code is 1, then we have to flip all the bits above the 5500 // terminating bit (which is the lowest 1 bit). 5501 if (pred & 1) { 5502 unsigned LowBit = mask & -mask; 5503 unsigned BitsAboveLowBit = 0xF & (-LowBit << 1); 5504 mask ^= BitsAboveLowBit; 5505 } 5506 5507 Inst.addOperand(MCOperand::createImm(pred)); 5508 Inst.addOperand(MCOperand::createImm(mask)); 5509 return S; 5510} 5511 5512static DecodeStatus 5513DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn, 5514 uint64_t Address, const void *Decoder) { 5515 DecodeStatus S = MCDisassembler::Success; 5516 5517 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 5518 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4); 5519 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5520 unsigned addr = fieldFromInstruction(Insn, 0, 8); 5521 unsigned W = fieldFromInstruction(Insn, 21, 1); 5522 unsigned U = fieldFromInstruction(Insn, 23, 1); 5523 unsigned P = fieldFromInstruction(Insn, 24, 1); 5524 bool writeback = (W == 1) | (P == 0); 5525 5526 addr |= (U << 8) | (Rn << 9); 5527 5528 if (writeback && (Rn == Rt || Rn == Rt2)) 5529 Check(S, MCDisassembler::SoftFail); 5530 if (Rt == Rt2) 5531 Check(S, MCDisassembler::SoftFail); 5532 5533 // Rt 5534 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder))) 5535 return MCDisassembler::Fail; 5536 // Rt2 5537 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder))) 5538 return MCDisassembler::Fail; 5539 // Writeback operand 5540 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder))) 5541 return MCDisassembler::Fail; 5542 // addr 5543 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder))) 5544 return MCDisassembler::Fail; 5545 5546 return S; 5547} 5548 5549static DecodeStatus 5550DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn, 5551 uint64_t Address, const void *Decoder) { 5552 DecodeStatus S = MCDisassembler::Success; 5553 5554 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 5555 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4); 5556 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5557 unsigned addr = fieldFromInstruction(Insn, 0, 8); 5558 unsigned W = fieldFromInstruction(Insn, 21, 1); 5559 unsigned U = fieldFromInstruction(Insn, 23, 1); 5560 unsigned P = fieldFromInstruction(Insn, 24, 1); 5561 bool writeback = (W == 1) | (P == 0); 5562 5563 addr |= (U << 8) | (Rn << 9); 5564 5565 if (writeback && (Rn == Rt || Rn == Rt2)) 5566 Check(S, MCDisassembler::SoftFail); 5567 5568 // Writeback operand 5569 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder))) 5570 return MCDisassembler::Fail; 5571 // Rt 5572 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder))) 5573 return MCDisassembler::Fail; 5574 // Rt2 5575 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder))) 5576 return MCDisassembler::Fail; 5577 // addr 5578 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder))) 5579 return MCDisassembler::Fail; 5580 5581 return S; 5582} 5583 5584static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn, 5585 uint64_t Address, const void *Decoder) { 5586 unsigned sign1 = fieldFromInstruction(Insn, 21, 1); 5587 unsigned sign2 = fieldFromInstruction(Insn, 23, 1); 5588 if (sign1 != sign2) return MCDisassembler::Fail; 5589 5590 unsigned Val = fieldFromInstruction(Insn, 0, 8); 5591 Val |= fieldFromInstruction(Insn, 12, 3) << 8; 5592 Val |= fieldFromInstruction(Insn, 26, 1) << 11; 5593 Val |= sign1 << 12; 5594 Inst.addOperand(MCOperand::createImm(SignExtend32<13>(Val))); 5595 5596 return MCDisassembler::Success; 5597} 5598 5599static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val, 5600 uint64_t Address, 5601 const void *Decoder) { 5602 DecodeStatus S = MCDisassembler::Success; 5603 5604 // Shift of "asr #32" is not allowed in Thumb2 mode. 5605 if (Val == 0x20) S = MCDisassembler::Fail; 5606 Inst.addOperand(MCOperand::createImm(Val)); 5607 return S; 5608} 5609 5610static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn, 5611 uint64_t Address, const void *Decoder) { 5612 unsigned Rt = fieldFromInstruction(Insn, 12, 4); 5613 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4); 5614 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5615 unsigned pred = fieldFromInstruction(Insn, 28, 4); 5616 5617 if (pred == 0xF) 5618 return DecodeCPSInstruction(Inst, Insn, Address, Decoder); 5619 5620 DecodeStatus S = MCDisassembler::Success; 5621 5622 if (Rt == Rn || Rn == Rt2) 5623 S = MCDisassembler::SoftFail; 5624 5625 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder))) 5626 return MCDisassembler::Fail; 5627 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder))) 5628 return MCDisassembler::Fail; 5629 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 5630 return MCDisassembler::Fail; 5631 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 5632 return MCDisassembler::Fail; 5633 5634 return S; 5635} 5636 5637static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn, 5638 uint64_t Address, const void *Decoder) { 5639 const FeatureBitset &featureBits = 5640 ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits(); 5641 bool hasFullFP16 = featureBits[ARM::FeatureFullFP16]; 5642 5643 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0); 5644 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4); 5645 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0); 5646 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4); 5647 unsigned imm = fieldFromInstruction(Insn, 16, 6); 5648 unsigned cmode = fieldFromInstruction(Insn, 8, 4); 5649 unsigned op = fieldFromInstruction(Insn, 5, 1); 5650 5651 DecodeStatus S = MCDisassembler::Success; 5652 5653 // If the top 3 bits of imm are clear, this is a VMOV (immediate) 5654 if (!(imm & 0x38)) { 5655 if (cmode == 0xF) { 5656 if (op == 1) return MCDisassembler::Fail; 5657 Inst.setOpcode(ARM::VMOVv2f32); 5658 } 5659 if (hasFullFP16) { 5660 if (cmode == 0xE) { 5661 if (op == 1) { 5662 Inst.setOpcode(ARM::VMOVv1i64); 5663 } else { 5664 Inst.setOpcode(ARM::VMOVv8i8); 5665 } 5666 } 5667 if (cmode == 0xD) { 5668 if (op == 1) { 5669 Inst.setOpcode(ARM::VMVNv2i32); 5670 } else { 5671 Inst.setOpcode(ARM::VMOVv2i32); 5672 } 5673 } 5674 if (cmode == 0xC) { 5675 if (op == 1) { 5676 Inst.setOpcode(ARM::VMVNv2i32); 5677 } else { 5678 Inst.setOpcode(ARM::VMOVv2i32); 5679 } 5680 } 5681 } 5682 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder); 5683 } 5684 5685 if (!(imm & 0x20)) return MCDisassembler::Fail; 5686 5687 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder))) 5688 return MCDisassembler::Fail; 5689 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder))) 5690 return MCDisassembler::Fail; 5691 Inst.addOperand(MCOperand::createImm(64 - imm)); 5692 5693 return S; 5694} 5695 5696static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn, 5697 uint64_t Address, const void *Decoder) { 5698 const FeatureBitset &featureBits = 5699 ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits(); 5700 bool hasFullFP16 = featureBits[ARM::FeatureFullFP16]; 5701 5702 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0); 5703 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4); 5704 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0); 5705 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4); 5706 unsigned imm = fieldFromInstruction(Insn, 16, 6); 5707 unsigned cmode = fieldFromInstruction(Insn, 8, 4); 5708 unsigned op = fieldFromInstruction(Insn, 5, 1); 5709 5710 DecodeStatus S = MCDisassembler::Success; 5711 5712 // If the top 3 bits of imm are clear, this is a VMOV (immediate) 5713 if (!(imm & 0x38)) { 5714 if (cmode == 0xF) { 5715 if (op == 1) return MCDisassembler::Fail; 5716 Inst.setOpcode(ARM::VMOVv4f32); 5717 } 5718 if (hasFullFP16) { 5719 if (cmode == 0xE) { 5720 if (op == 1) { 5721 Inst.setOpcode(ARM::VMOVv2i64); 5722 } else { 5723 Inst.setOpcode(ARM::VMOVv16i8); 5724 } 5725 } 5726 if (cmode == 0xD) { 5727 if (op == 1) { 5728 Inst.setOpcode(ARM::VMVNv4i32); 5729 } else { 5730 Inst.setOpcode(ARM::VMOVv4i32); 5731 } 5732 } 5733 if (cmode == 0xC) { 5734 if (op == 1) { 5735 Inst.setOpcode(ARM::VMVNv4i32); 5736 } else { 5737 Inst.setOpcode(ARM::VMOVv4i32); 5738 } 5739 } 5740 } 5741 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder); 5742 } 5743 5744 if (!(imm & 0x20)) return MCDisassembler::Fail; 5745 5746 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder))) 5747 return MCDisassembler::Fail; 5748 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder))) 5749 return MCDisassembler::Fail; 5750 Inst.addOperand(MCOperand::createImm(64 - imm)); 5751 5752 return S; 5753} 5754 5755static DecodeStatus DecodeNEONComplexLane64Instruction(MCInst &Inst, 5756 unsigned Insn, 5757 uint64_t Address, 5758 const void *Decoder) { 5759 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0); 5760 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4); 5761 unsigned Vn = (fieldFromInstruction(Insn, 16, 4) << 0); 5762 Vn |= (fieldFromInstruction(Insn, 7, 1) << 4); 5763 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0); 5764 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4); 5765 unsigned q = (fieldFromInstruction(Insn, 6, 1) << 0); 5766 unsigned rotate = (fieldFromInstruction(Insn, 20, 2) << 0); 5767 5768 DecodeStatus S = MCDisassembler::Success; 5769 5770 auto DestRegDecoder = q ? DecodeQPRRegisterClass : DecodeDPRRegisterClass; 5771 5772 if (!Check(S, DestRegDecoder(Inst, Vd, Address, Decoder))) 5773 return MCDisassembler::Fail; 5774 if (!Check(S, DestRegDecoder(Inst, Vd, Address, Decoder))) 5775 return MCDisassembler::Fail; 5776 if (!Check(S, DestRegDecoder(Inst, Vn, Address, Decoder))) 5777 return MCDisassembler::Fail; 5778 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder))) 5779 return MCDisassembler::Fail; 5780 // The lane index does not have any bits in the encoding, because it can only 5781 // be 0. 5782 Inst.addOperand(MCOperand::createImm(0)); 5783 Inst.addOperand(MCOperand::createImm(rotate)); 5784 5785 return S; 5786} 5787 5788static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val, 5789 uint64_t Address, const void *Decoder) { 5790 DecodeStatus S = MCDisassembler::Success; 5791 5792 unsigned Rn = fieldFromInstruction(Val, 16, 4); 5793 unsigned Rt = fieldFromInstruction(Val, 12, 4); 5794 unsigned Rm = fieldFromInstruction(Val, 0, 4); 5795 Rm |= (fieldFromInstruction(Val, 23, 1) << 4); 5796 unsigned Cond = fieldFromInstruction(Val, 28, 4); 5797 5798 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt) 5799 S = MCDisassembler::SoftFail; 5800 5801 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder))) 5802 return MCDisassembler::Fail; 5803 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 5804 return MCDisassembler::Fail; 5805 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder))) 5806 return MCDisassembler::Fail; 5807 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder))) 5808 return MCDisassembler::Fail; 5809 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder))) 5810 return MCDisassembler::Fail; 5811 5812 return S; 5813} 5814 5815static DecodeStatus DecoderForMRRC2AndMCRR2(MCInst &Inst, unsigned Val, 5816 uint64_t Address, const void *Decoder) { 5817 DecodeStatus S = MCDisassembler::Success; 5818 5819 unsigned CRm = fieldFromInstruction(Val, 0, 4); 5820 unsigned opc1 = fieldFromInstruction(Val, 4, 4); 5821 unsigned cop = fieldFromInstruction(Val, 8, 4); 5822 unsigned Rt = fieldFromInstruction(Val, 12, 4); 5823 unsigned Rt2 = fieldFromInstruction(Val, 16, 4); 5824 5825 if ((cop & ~0x1) == 0xa) 5826 return MCDisassembler::Fail; 5827 5828 if (Rt == Rt2) 5829 S = MCDisassembler::SoftFail; 5830 5831 // We have to check if the instruction is MRRC2 5832 // or MCRR2 when constructing the operands for 5833 // Inst. Reason is because MRRC2 stores to two 5834 // registers so it's tablegen desc has has two 5835 // outputs whereas MCRR doesn't store to any 5836 // registers so all of it's operands are listed 5837 // as inputs, therefore the operand order for 5838 // MRRC2 needs to be [Rt, Rt2, cop, opc1, CRm] 5839 // and MCRR2 operand order is [cop, opc1, Rt, Rt2, CRm] 5840 5841 if (Inst.getOpcode() == ARM::MRRC2) { 5842 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder))) 5843 return MCDisassembler::Fail; 5844 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder))) 5845 return MCDisassembler::Fail; 5846 } 5847 Inst.addOperand(MCOperand::createImm(cop)); 5848 Inst.addOperand(MCOperand::createImm(opc1)); 5849 if (Inst.getOpcode() == ARM::MCRR2) { 5850 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder))) 5851 return MCDisassembler::Fail; 5852 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder))) 5853 return MCDisassembler::Fail; 5854 } 5855 Inst.addOperand(MCOperand::createImm(CRm)); 5856 5857 return S; 5858} 5859 5860static DecodeStatus DecodeForVMRSandVMSR(MCInst &Inst, unsigned Val, 5861 uint64_t Address, 5862 const void *Decoder) { 5863 const FeatureBitset &featureBits = 5864 ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits(); 5865 DecodeStatus S = MCDisassembler::Success; 5866 5867 // Add explicit operand for the destination sysreg, for cases where 5868 // we have to model it for code generation purposes. 5869 switch (Inst.getOpcode()) { 5870 case ARM::VMSR_FPSCR_NZCVQC: 5871 Inst.addOperand(MCOperand::createReg(ARM::FPSCR_NZCV)); 5872 break; 5873 case ARM::VMSR_P0: 5874 Inst.addOperand(MCOperand::createReg(ARM::VPR)); 5875 break; 5876 } 5877 5878 if (Inst.getOpcode() != ARM::FMSTAT) { 5879 unsigned Rt = fieldFromInstruction(Val, 12, 4); 5880 5881 if (featureBits[ARM::ModeThumb] && !featureBits[ARM::HasV8Ops]) { 5882 if (Rt == 13 || Rt == 15) 5883 S = MCDisassembler::SoftFail; 5884 Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)); 5885 } else 5886 Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)); 5887 } 5888 5889 // Add explicit operand for the source sysreg, similarly to above. 5890 switch (Inst.getOpcode()) { 5891 case ARM::VMRS_FPSCR_NZCVQC: 5892 Inst.addOperand(MCOperand::createReg(ARM::FPSCR_NZCV)); 5893 break; 5894 case ARM::VMRS_P0: 5895 Inst.addOperand(MCOperand::createReg(ARM::VPR)); 5896 break; 5897 } 5898 5899 if (featureBits[ARM::ModeThumb]) { 5900 Inst.addOperand(MCOperand::createImm(ARMCC::AL)); 5901 Inst.addOperand(MCOperand::createReg(0)); 5902 } else { 5903 unsigned pred = fieldFromInstruction(Val, 28, 4); 5904 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 5905 return MCDisassembler::Fail; 5906 } 5907 5908 return S; 5909} 5910 5911template <bool isSigned, bool isNeg, bool zeroPermitted, int size> 5912static DecodeStatus DecodeBFLabelOperand(MCInst &Inst, unsigned Val, 5913 uint64_t Address, 5914 const void *Decoder) { 5915 DecodeStatus S = MCDisassembler::Success; 5916 if (Val == 0 && !zeroPermitted) 5917 S = MCDisassembler::Fail; 5918 5919 uint64_t DecVal; 5920 if (isSigned) 5921 DecVal = SignExtend32<size + 1>(Val << 1); 5922 else 5923 DecVal = (Val << 1); 5924 5925 if (!tryAddingSymbolicOperand(Address, Address + DecVal + 4, true, 4, Inst, 5926 Decoder)) 5927 Inst.addOperand(MCOperand::createImm(isNeg ? -DecVal : DecVal)); 5928 return S; 5929} 5930 5931static DecodeStatus DecodeBFAfterTargetOperand(MCInst &Inst, unsigned Val, 5932 uint64_t Address, 5933 const void *Decoder) { 5934 5935 uint64_t LocImm = Inst.getOperand(0).getImm(); 5936 Val = LocImm + (2 << Val); 5937 if (!tryAddingSymbolicOperand(Address, Address + Val + 4, true, 4, Inst, 5938 Decoder)) 5939 Inst.addOperand(MCOperand::createImm(Val)); 5940 return MCDisassembler::Success; 5941} 5942 5943static DecodeStatus DecodePredNoALOperand(MCInst &Inst, unsigned Val, 5944 uint64_t Address, 5945 const void *Decoder) { 5946 if (Val >= ARMCC::AL) // also exclude the non-condition NV 5947 return MCDisassembler::Fail; 5948 Inst.addOperand(MCOperand::createImm(Val)); 5949 return MCDisassembler::Success; 5950} 5951 5952static DecodeStatus DecodeLOLoop(MCInst &Inst, unsigned Insn, uint64_t Address, 5953 const void *Decoder) { 5954 DecodeStatus S = MCDisassembler::Success; 5955 5956 if (Inst.getOpcode() == ARM::MVE_LCTP) 5957 return S; 5958 5959 unsigned Imm = fieldFromInstruction(Insn, 11, 1) | 5960 fieldFromInstruction(Insn, 1, 10) << 1; 5961 switch (Inst.getOpcode()) { 5962 case ARM::t2LEUpdate: 5963 case ARM::MVE_LETP: 5964 Inst.addOperand(MCOperand::createReg(ARM::LR)); 5965 Inst.addOperand(MCOperand::createReg(ARM::LR)); 5966 LLVM_FALLTHROUGH; 5967 case ARM::t2LE: 5968 if (!Check(S, DecodeBFLabelOperand<false, true, true, 11>( 5969 Inst, Imm, Address, Decoder))) 5970 return MCDisassembler::Fail; 5971 break; 5972 case ARM::t2WLS: 5973 case ARM::MVE_WLSTP_8: 5974 case ARM::MVE_WLSTP_16: 5975 case ARM::MVE_WLSTP_32: 5976 case ARM::MVE_WLSTP_64: 5977 Inst.addOperand(MCOperand::createReg(ARM::LR)); 5978 if (!Check(S, 5979 DecoderGPRRegisterClass(Inst, fieldFromInstruction(Insn, 16, 4), 5980 Address, Decoder)) || 5981 !Check(S, DecodeBFLabelOperand<false, false, true, 11>( 5982 Inst, Imm, Address, Decoder))) 5983 return MCDisassembler::Fail; 5984 break; 5985 case ARM::t2DLS: 5986 case ARM::MVE_DLSTP_8: 5987 case ARM::MVE_DLSTP_16: 5988 case ARM::MVE_DLSTP_32: 5989 case ARM::MVE_DLSTP_64: 5990 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 5991 if (Rn == 0xF) { 5992 // Enforce all the rest of the instruction bits in LCTP, which 5993 // won't have been reliably checked based on LCTP's own tablegen 5994 // record, because we came to this decode by a roundabout route. 5995 uint32_t CanonicalLCTP = 0xF00FE001, SBZMask = 0x00300FFE; 5996 if ((Insn & ~SBZMask) != CanonicalLCTP) 5997 return MCDisassembler::Fail; // a mandatory bit is wrong: hard fail 5998 if (Insn != CanonicalLCTP) 5999 Check(S, MCDisassembler::SoftFail); // an SBZ bit is wrong: soft fail 6000 6001 Inst.setOpcode(ARM::MVE_LCTP); 6002 } else { 6003 Inst.addOperand(MCOperand::createReg(ARM::LR)); 6004 if (!Check(S, DecoderGPRRegisterClass(Inst, 6005 fieldFromInstruction(Insn, 16, 4), 6006 Address, Decoder))) 6007 return MCDisassembler::Fail; 6008 } 6009 break; 6010 } 6011 return S; 6012} 6013 6014static DecodeStatus DecodeLongShiftOperand(MCInst &Inst, unsigned Val, 6015 uint64_t Address, 6016 const void *Decoder) { 6017 DecodeStatus S = MCDisassembler::Success; 6018 6019 if (Val == 0) 6020 Val = 32; 6021 6022 Inst.addOperand(MCOperand::createImm(Val)); 6023 6024 return S; 6025} 6026 6027static DecodeStatus DecodetGPROddRegisterClass(MCInst &Inst, unsigned RegNo, 6028 uint64_t Address, const void *Decoder) { 6029 if ((RegNo) + 1 > 11) 6030 return MCDisassembler::Fail; 6031 6032 unsigned Register = GPRDecoderTable[(RegNo) + 1]; 6033 Inst.addOperand(MCOperand::createReg(Register)); 6034 return MCDisassembler::Success; 6035} 6036 6037static DecodeStatus DecodetGPREvenRegisterClass(MCInst &Inst, unsigned RegNo, 6038 uint64_t Address, const void *Decoder) { 6039 if ((RegNo) > 14) 6040 return MCDisassembler::Fail; 6041 6042 unsigned Register = GPRDecoderTable[(RegNo)]; 6043 Inst.addOperand(MCOperand::createReg(Register)); 6044 return MCDisassembler::Success; 6045} 6046 6047static DecodeStatus DecodeVSCCLRM(MCInst &Inst, unsigned Insn, uint64_t Address, 6048 const void *Decoder) { 6049 DecodeStatus S = MCDisassembler::Success; 6050 6051 Inst.addOperand(MCOperand::createImm(ARMCC::AL)); 6052 Inst.addOperand(MCOperand::createReg(0)); 6053 if (Inst.getOpcode() == ARM::VSCCLRMD) { 6054 unsigned reglist = (fieldFromInstruction(Insn, 1, 7) << 1) | 6055 (fieldFromInstruction(Insn, 12, 4) << 8) | 6056 (fieldFromInstruction(Insn, 22, 1) << 12); 6057 if (!Check(S, DecodeDPRRegListOperand(Inst, reglist, Address, Decoder))) { 6058 return MCDisassembler::Fail; 6059 } 6060 } else { 6061 unsigned reglist = fieldFromInstruction(Insn, 0, 8) | 6062 (fieldFromInstruction(Insn, 22, 1) << 8) | 6063 (fieldFromInstruction(Insn, 12, 4) << 9); 6064 if (!Check(S, DecodeSPRRegListOperand(Inst, reglist, Address, Decoder))) { 6065 return MCDisassembler::Fail; 6066 } 6067 } 6068 Inst.addOperand(MCOperand::createReg(ARM::VPR)); 6069 6070 return S; 6071} 6072 6073static DecodeStatus DecodeMQPRRegisterClass(MCInst &Inst, unsigned RegNo, 6074 uint64_t Address, 6075 const void *Decoder) { 6076 if (RegNo > 7) 6077 return MCDisassembler::Fail; 6078 6079 unsigned Register = QPRDecoderTable[RegNo]; 6080 Inst.addOperand(MCOperand::createReg(Register)); 6081 return MCDisassembler::Success; 6082} 6083 6084static const uint16_t QQPRDecoderTable[] = { 6085 ARM::Q0_Q1, ARM::Q1_Q2, ARM::Q2_Q3, ARM::Q3_Q4, 6086 ARM::Q4_Q5, ARM::Q5_Q6, ARM::Q6_Q7 6087}; 6088 6089static DecodeStatus DecodeQQPRRegisterClass(MCInst &Inst, unsigned RegNo, 6090 uint64_t Address, 6091 const void *Decoder) { 6092 if (RegNo > 6) 6093 return MCDisassembler::Fail; 6094 6095 unsigned Register = QQPRDecoderTable[RegNo]; 6096 Inst.addOperand(MCOperand::createReg(Register)); 6097 return MCDisassembler::Success; 6098} 6099 6100static const uint16_t QQQQPRDecoderTable[] = { 6101 ARM::Q0_Q1_Q2_Q3, ARM::Q1_Q2_Q3_Q4, ARM::Q2_Q3_Q4_Q5, 6102 ARM::Q3_Q4_Q5_Q6, ARM::Q4_Q5_Q6_Q7 6103}; 6104 6105static DecodeStatus DecodeQQQQPRRegisterClass(MCInst &Inst, unsigned RegNo, 6106 uint64_t Address, 6107 const void *Decoder) { 6108 if (RegNo > 4) 6109 return MCDisassembler::Fail; 6110 6111 unsigned Register = QQQQPRDecoderTable[RegNo]; 6112 Inst.addOperand(MCOperand::createReg(Register)); 6113 return MCDisassembler::Success; 6114} 6115 6116static DecodeStatus DecodeVPTMaskOperand(MCInst &Inst, unsigned Val, 6117 uint64_t Address, 6118 const void *Decoder) { 6119 DecodeStatus S = MCDisassembler::Success; 6120 6121 // Parse VPT mask and encode it in the MCInst as an immediate with the same 6122 // format as the it_mask. That is, from the second 'e|t' encode 'e' as 1 and 6123 // 't' as 0 and finish with a 1. 6124 unsigned Imm = 0; 6125 // We always start with a 't'. 6126 unsigned CurBit = 0; 6127 for (int i = 3; i >= 0; --i) { 6128 // If the bit we are looking at is not the same as last one, invert the 6129 // CurBit, if it is the same leave it as is. 6130 CurBit ^= (Val >> i) & 1U; 6131 6132 // Encode the CurBit at the right place in the immediate. 6133 Imm |= (CurBit << i); 6134 6135 // If we are done, finish the encoding with a 1. 6136 if ((Val & ~(~0U << i)) == 0) { 6137 Imm |= 1U << i; 6138 break; 6139 } 6140 } 6141 6142 Inst.addOperand(MCOperand::createImm(Imm)); 6143 6144 return S; 6145} 6146 6147static DecodeStatus DecodeVpredROperand(MCInst &Inst, unsigned RegNo, 6148 uint64_t Address, const void *Decoder) { 6149 // The vpred_r operand type includes an MQPR register field derived 6150 // from the encoding. But we don't actually want to add an operand 6151 // to the MCInst at this stage, because AddThumbPredicate will do it 6152 // later, and will infer the register number from the TIED_TO 6153 // constraint. So this is a deliberately empty decoder method that 6154 // will inhibit the auto-generated disassembly code from adding an 6155 // operand at all. 6156 return MCDisassembler::Success; 6157} 6158 6159static DecodeStatus DecodeRestrictedIPredicateOperand(MCInst &Inst, 6160 unsigned Val, 6161 uint64_t Address, 6162 const void *Decoder) { 6163 Inst.addOperand(MCOperand::createImm((Val & 0x1) == 0 ? ARMCC::EQ : ARMCC::NE)); 6164 return MCDisassembler::Success; 6165} 6166 6167static DecodeStatus DecodeRestrictedSPredicateOperand(MCInst &Inst, 6168 unsigned Val, 6169 uint64_t Address, 6170 const void *Decoder) { 6171 unsigned Code; 6172 switch (Val & 0x3) { 6173 case 0: 6174 Code = ARMCC::GE; 6175 break; 6176 case 1: 6177 Code = ARMCC::LT; 6178 break; 6179 case 2: 6180 Code = ARMCC::GT; 6181 break; 6182 case 3: 6183 Code = ARMCC::LE; 6184 break; 6185 } 6186 Inst.addOperand(MCOperand::createImm(Code)); 6187 return MCDisassembler::Success; 6188} 6189 6190static DecodeStatus DecodeRestrictedUPredicateOperand(MCInst &Inst, 6191 unsigned Val, 6192 uint64_t Address, 6193 const void *Decoder) { 6194 Inst.addOperand(MCOperand::createImm((Val & 0x1) == 0 ? ARMCC::HS : ARMCC::HI)); 6195 return MCDisassembler::Success; 6196} 6197 6198static DecodeStatus DecodeRestrictedFPPredicateOperand(MCInst &Inst, unsigned Val, 6199 uint64_t Address, 6200 const void *Decoder) { 6201 unsigned Code; 6202 switch (Val) { 6203 default: 6204 return MCDisassembler::Fail; 6205 case 0: 6206 Code = ARMCC::EQ; 6207 break; 6208 case 1: 6209 Code = ARMCC::NE; 6210 break; 6211 case 4: 6212 Code = ARMCC::GE; 6213 break; 6214 case 5: 6215 Code = ARMCC::LT; 6216 break; 6217 case 6: 6218 Code = ARMCC::GT; 6219 break; 6220 case 7: 6221 Code = ARMCC::LE; 6222 break; 6223 } 6224 6225 Inst.addOperand(MCOperand::createImm(Code)); 6226 return MCDisassembler::Success; 6227} 6228 6229static DecodeStatus DecodeVCVTImmOperand(MCInst &Inst, unsigned Val, 6230 uint64_t Address, const void *Decoder) { 6231 DecodeStatus S = MCDisassembler::Success; 6232 6233 unsigned DecodedVal = 64 - Val; 6234 6235 switch (Inst.getOpcode()) { 6236 case ARM::MVE_VCVTf16s16_fix: 6237 case ARM::MVE_VCVTs16f16_fix: 6238 case ARM::MVE_VCVTf16u16_fix: 6239 case ARM::MVE_VCVTu16f16_fix: 6240 if (DecodedVal > 16) 6241 return MCDisassembler::Fail; 6242 break; 6243 case ARM::MVE_VCVTf32s32_fix: 6244 case ARM::MVE_VCVTs32f32_fix: 6245 case ARM::MVE_VCVTf32u32_fix: 6246 case ARM::MVE_VCVTu32f32_fix: 6247 if (DecodedVal > 32) 6248 return MCDisassembler::Fail; 6249 break; 6250 } 6251 6252 Inst.addOperand(MCOperand::createImm(64 - Val)); 6253 6254 return S; 6255} 6256 6257static unsigned FixedRegForVSTRVLDR_SYSREG(unsigned Opcode) { 6258 switch (Opcode) { 6259 case ARM::VSTR_P0_off: 6260 case ARM::VSTR_P0_pre: 6261 case ARM::VSTR_P0_post: 6262 case ARM::VLDR_P0_off: 6263 case ARM::VLDR_P0_pre: 6264 case ARM::VLDR_P0_post: 6265 return ARM::P0; 6266 default: 6267 return 0; 6268 } 6269} 6270 6271template<bool Writeback> 6272static DecodeStatus DecodeVSTRVLDR_SYSREG(MCInst &Inst, unsigned Val, 6273 uint64_t Address, 6274 const void *Decoder) { 6275 switch (Inst.getOpcode()) { 6276 case ARM::VSTR_FPSCR_pre: 6277 case ARM::VSTR_FPSCR_NZCVQC_pre: 6278 case ARM::VLDR_FPSCR_pre: 6279 case ARM::VLDR_FPSCR_NZCVQC_pre: 6280 case ARM::VSTR_FPSCR_off: 6281 case ARM::VSTR_FPSCR_NZCVQC_off: 6282 case ARM::VLDR_FPSCR_off: 6283 case ARM::VLDR_FPSCR_NZCVQC_off: 6284 case ARM::VSTR_FPSCR_post: 6285 case ARM::VSTR_FPSCR_NZCVQC_post: 6286 case ARM::VLDR_FPSCR_post: 6287 case ARM::VLDR_FPSCR_NZCVQC_post: 6288 const FeatureBitset &featureBits = 6289 ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits(); 6290 6291 if (!featureBits[ARM::HasMVEIntegerOps] && !featureBits[ARM::FeatureVFP2]) 6292 return MCDisassembler::Fail; 6293 } 6294 6295 DecodeStatus S = MCDisassembler::Success; 6296 if (unsigned Sysreg = FixedRegForVSTRVLDR_SYSREG(Inst.getOpcode())) 6297 Inst.addOperand(MCOperand::createReg(Sysreg)); 6298 unsigned Rn = fieldFromInstruction(Val, 16, 4); 6299 unsigned addr = fieldFromInstruction(Val, 0, 7) | 6300 (fieldFromInstruction(Val, 23, 1) << 7) | (Rn << 8); 6301 6302 if (Writeback) { 6303 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 6304 return MCDisassembler::Fail; 6305 } 6306 if (!Check(S, DecodeT2AddrModeImm7s4(Inst, addr, Address, Decoder))) 6307 return MCDisassembler::Fail; 6308 6309 Inst.addOperand(MCOperand::createImm(ARMCC::AL)); 6310 Inst.addOperand(MCOperand::createReg(0)); 6311 6312 return S; 6313} 6314 6315static inline DecodeStatus DecodeMVE_MEM_pre( 6316 MCInst &Inst, unsigned Val, uint64_t Address, const void *Decoder, 6317 unsigned Rn, OperandDecoder RnDecoder, OperandDecoder AddrDecoder) { 6318 DecodeStatus S = MCDisassembler::Success; 6319 6320 unsigned Qd = fieldFromInstruction(Val, 13, 3); 6321 unsigned addr = fieldFromInstruction(Val, 0, 7) | 6322 (fieldFromInstruction(Val, 23, 1) << 7) | (Rn << 8); 6323 6324 if (!Check(S, RnDecoder(Inst, Rn, Address, Decoder))) 6325 return MCDisassembler::Fail; 6326 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder))) 6327 return MCDisassembler::Fail; 6328 if (!Check(S, AddrDecoder(Inst, addr, Address, Decoder))) 6329 return MCDisassembler::Fail; 6330 6331 return S; 6332} 6333 6334template <int shift> 6335static DecodeStatus DecodeMVE_MEM_1_pre(MCInst &Inst, unsigned Val, 6336 uint64_t Address, const void *Decoder) { 6337 return DecodeMVE_MEM_pre(Inst, Val, Address, Decoder, 6338 fieldFromInstruction(Val, 16, 3), 6339 DecodetGPRRegisterClass, 6340 DecodeTAddrModeImm7<shift>); 6341} 6342 6343template <int shift> 6344static DecodeStatus DecodeMVE_MEM_2_pre(MCInst &Inst, unsigned Val, 6345 uint64_t Address, const void *Decoder) { 6346 return DecodeMVE_MEM_pre(Inst, Val, Address, Decoder, 6347 fieldFromInstruction(Val, 16, 4), 6348 DecoderGPRRegisterClass, 6349 DecodeT2AddrModeImm7<shift,1>); 6350} 6351 6352template <int shift> 6353static DecodeStatus DecodeMVE_MEM_3_pre(MCInst &Inst, unsigned Val, 6354 uint64_t Address, const void *Decoder) { 6355 return DecodeMVE_MEM_pre(Inst, Val, Address, Decoder, 6356 fieldFromInstruction(Val, 17, 3), 6357 DecodeMQPRRegisterClass, 6358 DecodeMveAddrModeQ<shift>); 6359} 6360 6361template<unsigned MinLog, unsigned MaxLog> 6362static DecodeStatus DecodePowerTwoOperand(MCInst &Inst, unsigned Val, 6363 uint64_t Address, 6364 const void *Decoder) { 6365 DecodeStatus S = MCDisassembler::Success; 6366 6367 if (Val < MinLog || Val > MaxLog) 6368 return MCDisassembler::Fail; 6369 6370 Inst.addOperand(MCOperand::createImm(1LL << Val)); 6371 return S; 6372} 6373 6374template <int shift> 6375static DecodeStatus DecodeExpandedImmOperand(MCInst &Inst, unsigned Val, 6376 uint64_t Address, 6377 const void *Decoder) { 6378 Val <<= shift; 6379 6380 Inst.addOperand(MCOperand::createImm(Val)); 6381 return MCDisassembler::Success; 6382} 6383 6384template<unsigned start> 6385static DecodeStatus DecodeMVEPairVectorIndexOperand(MCInst &Inst, unsigned Val, 6386 uint64_t Address, 6387 const void *Decoder) { 6388 DecodeStatus S = MCDisassembler::Success; 6389 6390 Inst.addOperand(MCOperand::createImm(start + Val)); 6391 6392 return S; 6393} 6394 6395static DecodeStatus DecodeMVEVMOVQtoDReg(MCInst &Inst, unsigned Insn, 6396 uint64_t Address, const void *Decoder) { 6397 DecodeStatus S = MCDisassembler::Success; 6398 unsigned Rt = fieldFromInstruction(Insn, 0, 4); 6399 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4); 6400 unsigned Qd = ((fieldFromInstruction(Insn, 22, 1) << 3) | 6401 fieldFromInstruction(Insn, 13, 3)); 6402 unsigned index = fieldFromInstruction(Insn, 4, 1); 6403 6404 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 6405 return MCDisassembler::Fail; 6406 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2, Address, Decoder))) 6407 return MCDisassembler::Fail; 6408 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder))) 6409 return MCDisassembler::Fail; 6410 if (!Check(S, DecodeMVEPairVectorIndexOperand<2>(Inst, index, Address, Decoder))) 6411 return MCDisassembler::Fail; 6412 if (!Check(S, DecodeMVEPairVectorIndexOperand<0>(Inst, index, Address, Decoder))) 6413 return MCDisassembler::Fail; 6414 6415 return S; 6416} 6417 6418static DecodeStatus DecodeMVEVMOVDRegtoQ(MCInst &Inst, unsigned Insn, 6419 uint64_t Address, const void *Decoder) { 6420 DecodeStatus S = MCDisassembler::Success; 6421 unsigned Rt = fieldFromInstruction(Insn, 0, 4); 6422 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4); 6423 unsigned Qd = ((fieldFromInstruction(Insn, 22, 1) << 3) | 6424 fieldFromInstruction(Insn, 13, 3)); 6425 unsigned index = fieldFromInstruction(Insn, 4, 1); 6426 6427 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder))) 6428 return MCDisassembler::Fail; 6429 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder))) 6430 return MCDisassembler::Fail; 6431 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 6432 return MCDisassembler::Fail; 6433 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2, Address, Decoder))) 6434 return MCDisassembler::Fail; 6435 if (!Check(S, DecodeMVEPairVectorIndexOperand<2>(Inst, index, Address, Decoder))) 6436 return MCDisassembler::Fail; 6437 if (!Check(S, DecodeMVEPairVectorIndexOperand<0>(Inst, index, Address, Decoder))) 6438 return MCDisassembler::Fail; 6439 6440 return S; 6441} 6442 6443static DecodeStatus DecodeMVEOverlappingLongShift( 6444 MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder) { 6445 DecodeStatus S = MCDisassembler::Success; 6446 6447 unsigned RdaLo = fieldFromInstruction(Insn, 17, 3) << 1; 6448 unsigned RdaHi = fieldFromInstruction(Insn, 9, 3) << 1; 6449 unsigned Rm = fieldFromInstruction(Insn, 12, 4); 6450 6451 if (RdaHi == 14) { 6452 // This value of RdaHi (really indicating pc, because RdaHi has to 6453 // be an odd-numbered register, so the low bit will be set by the 6454 // decode function below) indicates that we must decode as SQRSHR 6455 // or UQRSHL, which both have a single Rda register field with all 6456 // four bits. 6457 unsigned Rda = fieldFromInstruction(Insn, 16, 4); 6458 6459 switch (Inst.getOpcode()) { 6460 case ARM::MVE_ASRLr: 6461 case ARM::MVE_SQRSHRL: 6462 Inst.setOpcode(ARM::MVE_SQRSHR); 6463 break; 6464 case ARM::MVE_LSLLr: 6465 case ARM::MVE_UQRSHLL: 6466 Inst.setOpcode(ARM::MVE_UQRSHL); 6467 break; 6468 default: 6469 llvm_unreachable("Unexpected starting opcode!"); 6470 } 6471 6472 // Rda as output parameter 6473 if (!Check(S, DecoderGPRRegisterClass(Inst, Rda, Address, Decoder))) 6474 return MCDisassembler::Fail; 6475 6476 // Rda again as input parameter 6477 if (!Check(S, DecoderGPRRegisterClass(Inst, Rda, Address, Decoder))) 6478 return MCDisassembler::Fail; 6479 6480 // Rm, the amount to shift by 6481 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))) 6482 return MCDisassembler::Fail; 6483 6484 return S; 6485 } 6486 6487 // Otherwise, we decode as whichever opcode our caller has already 6488 // put into Inst. Those all look the same: 6489 6490 // RdaLo,RdaHi as output parameters 6491 if (!Check(S, DecodetGPREvenRegisterClass(Inst, RdaLo, Address, Decoder))) 6492 return MCDisassembler::Fail; 6493 if (!Check(S, DecodetGPROddRegisterClass(Inst, RdaHi, Address, Decoder))) 6494 return MCDisassembler::Fail; 6495 6496 // RdaLo,RdaHi again as input parameters 6497 if (!Check(S, DecodetGPREvenRegisterClass(Inst, RdaLo, Address, Decoder))) 6498 return MCDisassembler::Fail; 6499 if (!Check(S, DecodetGPROddRegisterClass(Inst, RdaHi, Address, Decoder))) 6500 return MCDisassembler::Fail; 6501 6502 // Rm, the amount to shift by 6503 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))) 6504 return MCDisassembler::Fail; 6505 6506 return S; 6507} 6508 6509static DecodeStatus DecodeMVEVCVTt1fp(MCInst &Inst, unsigned Insn, uint64_t Address, 6510 const void *Decoder) { 6511 DecodeStatus S = MCDisassembler::Success; 6512 unsigned Qd = ((fieldFromInstruction(Insn, 22, 1) << 3) | 6513 fieldFromInstruction(Insn, 13, 3)); 6514 unsigned Qm = ((fieldFromInstruction(Insn, 5, 1) << 3) | 6515 fieldFromInstruction(Insn, 1, 3)); 6516 unsigned imm6 = fieldFromInstruction(Insn, 16, 6); 6517 6518 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder))) 6519 return MCDisassembler::Fail; 6520 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qm, Address, Decoder))) 6521 return MCDisassembler::Fail; 6522 if (!Check(S, DecodeVCVTImmOperand(Inst, imm6, Address, Decoder))) 6523 return MCDisassembler::Fail; 6524 6525 return S; 6526} 6527 6528template<bool scalar, OperandDecoder predicate_decoder> 6529static DecodeStatus DecodeMVEVCMP(MCInst &Inst, unsigned Insn, uint64_t Address, 6530 const void *Decoder) { 6531 DecodeStatus S = MCDisassembler::Success; 6532 Inst.addOperand(MCOperand::createReg(ARM::VPR)); 6533 unsigned Qn = fieldFromInstruction(Insn, 17, 3); 6534 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qn, Address, Decoder))) 6535 return MCDisassembler::Fail; 6536 6537 unsigned fc; 6538 6539 if (scalar) { 6540 fc = fieldFromInstruction(Insn, 12, 1) << 2 | 6541 fieldFromInstruction(Insn, 7, 1) | 6542 fieldFromInstruction(Insn, 5, 1) << 1; 6543 unsigned Rm = fieldFromInstruction(Insn, 0, 4); 6544 if (!Check(S, DecodeGPRwithZRRegisterClass(Inst, Rm, Address, Decoder))) 6545 return MCDisassembler::Fail; 6546 } else { 6547 fc = fieldFromInstruction(Insn, 12, 1) << 2 | 6548 fieldFromInstruction(Insn, 7, 1) | 6549 fieldFromInstruction(Insn, 0, 1) << 1; 6550 unsigned Qm = fieldFromInstruction(Insn, 5, 1) << 4 | 6551 fieldFromInstruction(Insn, 1, 3); 6552 if (!Check(S, DecodeMQPRRegisterClass(Inst, Qm, Address, Decoder))) 6553 return MCDisassembler::Fail; 6554 } 6555 6556 if (!Check(S, predicate_decoder(Inst, fc, Address, Decoder))) 6557 return MCDisassembler::Fail; 6558 6559 Inst.addOperand(MCOperand::createImm(ARMVCC::None)); 6560 Inst.addOperand(MCOperand::createReg(0)); 6561 Inst.addOperand(MCOperand::createImm(0)); 6562 6563 return S; 6564} 6565 6566static DecodeStatus DecodeMveVCTP(MCInst &Inst, unsigned Insn, uint64_t Address, 6567 const void *Decoder) { 6568 DecodeStatus S = MCDisassembler::Success; 6569 Inst.addOperand(MCOperand::createReg(ARM::VPR)); 6570 unsigned Rn = fieldFromInstruction(Insn, 16, 4); 6571 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder))) 6572 return MCDisassembler::Fail; 6573 return S; 6574} 6575