| 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/MCDecoder.h" |
| 17 | #include "llvm/MC/MCDecoderOps.h" |
| 18 | #include "llvm/MC/MCDisassembler/MCDisassembler.h" |
| 19 | #include "llvm/MC/MCInst.h" |
| 20 | #include "llvm/MC/MCInstrDesc.h" |
| 21 | #include "llvm/MC/MCInstrInfo.h" |
| 22 | #include "llvm/MC/MCSubtargetInfo.h" |
| 23 | #include "llvm/MC/TargetRegistry.h" |
| 24 | #include "llvm/Support/Compiler.h" |
| 25 | #include "llvm/Support/ErrorHandling.h" |
| 26 | #include "llvm/Support/MathExtras.h" |
| 27 | #include "llvm/Support/raw_ostream.h" |
| 28 | #include "llvm/TargetParser/SubtargetFeature.h" |
| 29 | #include <algorithm> |
| 30 | #include <cassert> |
| 31 | #include <cstdint> |
| 32 | #include <vector> |
| 33 | |
| 34 | using namespace llvm; |
| 35 | using namespace llvm::MCD; |
| 36 | |
| 37 | #define DEBUG_TYPE "arm-disassembler" |
| 38 | |
| 39 | using DecodeStatus = MCDisassembler::DecodeStatus; |
| 40 | |
| 41 | namespace { |
| 42 | |
| 43 | // Handles the condition code status of instructions in IT blocks |
| 44 | class ITStatus { |
| 45 | public: |
| 46 | // Returns the condition code for instruction in IT block |
| 47 | unsigned getITCC() { |
| 48 | unsigned CC = ARMCC::AL; |
| 49 | if (instrInITBlock()) |
| 50 | CC = ITStates.back(); |
| 51 | return CC; |
| 52 | } |
| 53 | |
| 54 | // Advances the IT block state to the next T or E |
| 55 | void advanceITState() { ITStates.pop_back(); } |
| 56 | |
| 57 | // Returns true if the current instruction is in an IT block |
| 58 | bool instrInITBlock() { return !ITStates.empty(); } |
| 59 | |
| 60 | // Returns true if current instruction is the last instruction in an IT block |
| 61 | bool instrLastInITBlock() { return ITStates.size() == 1; } |
| 62 | |
| 63 | // Called when decoding an IT instruction. Sets the IT state for |
| 64 | // the following instructions that for the IT block. Firstcond |
| 65 | // corresponds to the field in the IT instruction encoding; Mask |
| 66 | // is in the MCOperand format in which 1 means 'else' and 0 'then'. |
| 67 | void setITState(char Firstcond, char Mask) { |
| 68 | // (3 - the number of trailing zeros) is the number of then / else. |
| 69 | unsigned NumTZ = llvm::countr_zero<uint8_t>(Val: Mask); |
| 70 | unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf); |
| 71 | assert(NumTZ <= 3 && "Invalid IT mask!" ); |
| 72 | // push condition codes onto the stack the correct order for the pops |
| 73 | for (unsigned Pos = NumTZ + 1; Pos <= 3; ++Pos) { |
| 74 | unsigned Else = (Mask >> Pos) & 1; |
| 75 | ITStates.push_back(x: CCBits ^ Else); |
| 76 | } |
| 77 | ITStates.push_back(x: CCBits); |
| 78 | } |
| 79 | |
| 80 | private: |
| 81 | std::vector<unsigned char> ITStates; |
| 82 | }; |
| 83 | |
| 84 | class VPTStatus { |
| 85 | public: |
| 86 | unsigned getVPTPred() { |
| 87 | unsigned Pred = ARMVCC::None; |
| 88 | if (instrInVPTBlock()) |
| 89 | Pred = VPTStates.back(); |
| 90 | return Pred; |
| 91 | } |
| 92 | |
| 93 | void advanceVPTState() { VPTStates.pop_back(); } |
| 94 | |
| 95 | bool instrInVPTBlock() { return !VPTStates.empty(); } |
| 96 | |
| 97 | bool instrLastInVPTBlock() { return VPTStates.size() == 1; } |
| 98 | |
| 99 | void setVPTState(char Mask) { |
| 100 | // (3 - the number of trailing zeros) is the number of then / else. |
| 101 | unsigned NumTZ = llvm::countr_zero<uint8_t>(Val: Mask); |
| 102 | assert(NumTZ <= 3 && "Invalid VPT mask!" ); |
| 103 | // push predicates onto the stack the correct order for the pops |
| 104 | for (unsigned Pos = NumTZ + 1; Pos <= 3; ++Pos) { |
| 105 | bool T = ((Mask >> Pos) & 1) == 0; |
| 106 | if (T) |
| 107 | VPTStates.push_back(Elt: ARMVCC::Then); |
| 108 | else |
| 109 | VPTStates.push_back(Elt: ARMVCC::Else); |
| 110 | } |
| 111 | VPTStates.push_back(Elt: ARMVCC::Then); |
| 112 | } |
| 113 | |
| 114 | private: |
| 115 | SmallVector<unsigned char, 4> VPTStates; |
| 116 | }; |
| 117 | |
| 118 | /// ARM disassembler for all ARM platforms. |
| 119 | class ARMDisassembler : public MCDisassembler { |
| 120 | public: |
| 121 | std::unique_ptr<const MCInstrInfo> MCII; |
| 122 | mutable ITStatus ITBlock; |
| 123 | mutable VPTStatus VPTBlock; |
| 124 | |
| 125 | ARMDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, |
| 126 | const MCInstrInfo *MCII) |
| 127 | : MCDisassembler(STI, Ctx), MCII(MCII) { |
| 128 | InstructionEndianness = STI.hasFeature(Feature: ARM::ModeBigEndianInstructions) |
| 129 | ? llvm::endianness::big |
| 130 | : llvm::endianness::little; |
| 131 | } |
| 132 | |
| 133 | ~ARMDisassembler() override = default; |
| 134 | |
| 135 | DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, |
| 136 | ArrayRef<uint8_t> Bytes, uint64_t Address, |
| 137 | raw_ostream &CStream) const override; |
| 138 | |
| 139 | uint64_t suggestBytesToSkip(ArrayRef<uint8_t> Bytes, |
| 140 | uint64_t Address) const override; |
| 141 | |
| 142 | private: |
| 143 | DecodeStatus getARMInstruction(MCInst &Instr, uint64_t &Size, |
| 144 | ArrayRef<uint8_t> Bytes, uint64_t Address, |
| 145 | raw_ostream &CStream) const; |
| 146 | |
| 147 | DecodeStatus getThumbInstruction(MCInst &Instr, uint64_t &Size, |
| 148 | ArrayRef<uint8_t> Bytes, uint64_t Address, |
| 149 | raw_ostream &CStream) const; |
| 150 | |
| 151 | bool isVectorPredicable(const MCInst &MI) const; |
| 152 | DecodeStatus checkThumbPredicate(MCInst &) const; |
| 153 | void UpdateThumbPredicate(DecodeStatus &S, MCInst &MI) const; |
| 154 | |
| 155 | llvm::endianness InstructionEndianness; |
| 156 | }; |
| 157 | |
| 158 | } // end anonymous namespace |
| 159 | |
| 160 | typedef DecodeStatus OperandDecoder(MCInst &Inst, unsigned Val, |
| 161 | uint64_t Address, |
| 162 | const MCDisassembler *Decoder); |
| 163 | |
| 164 | /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the |
| 165 | /// immediate Value in the MCInst. The immediate Value has had any PC |
| 166 | /// adjustment made by the caller. If the instruction is a branch instruction |
| 167 | /// then isBranch is true, else false. If the getOpInfo() function was set as |
| 168 | /// part of the setupForSymbolicDisassembly() call then that function is called |
| 169 | /// to get any symbolic information at the Address for this instruction. If |
| 170 | /// that returns non-zero then the symbolic information it returns is used to |
| 171 | /// create an MCExpr and that is added as an operand to the MCInst. If |
| 172 | /// getOpInfo() returns zero and isBranch is true then a symbol look up for |
| 173 | /// Value is done and if a symbol is found an MCExpr is created with that, else |
| 174 | /// an MCExpr with Value is created. This function returns true if it adds an |
| 175 | /// operand to the MCInst and false otherwise. |
| 176 | static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value, |
| 177 | bool isBranch, uint64_t InstSize, |
| 178 | MCInst &MI, |
| 179 | const MCDisassembler *Decoder) { |
| 180 | // FIXME: Does it make sense for value to be negative? |
| 181 | return Decoder->tryAddingSymbolicOperand(Inst&: MI, Value: (uint32_t)Value, Address, |
| 182 | IsBranch: isBranch, /*Offset=*/0, /*OpSize=*/0, |
| 183 | InstSize); |
| 184 | } |
| 185 | |
| 186 | /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being |
| 187 | /// referenced by a load instruction with the base register that is the Pc. |
| 188 | /// These can often be values in a literal pool near the Address of the |
| 189 | /// instruction. The Address of the instruction and its immediate Value are |
| 190 | /// used as a possible literal pool entry. The SymbolLookUp call back will |
| 191 | /// return the name of a symbol referenced by the literal pool's entry if |
| 192 | /// the referenced address is that of a symbol. Or it will return a pointer to |
| 193 | /// a literal 'C' string if the referenced address of the literal pool's entry |
| 194 | /// is an address into a section with 'C' string literals. |
| 195 | static void (uint64_t Address, int Value, |
| 196 | const MCDisassembler *Decoder) { |
| 197 | Decoder->tryAddingPcLoadReferenceComment(Value, Address); |
| 198 | } |
| 199 | |
| 200 | // Register class decoding functions. |
| 201 | |
| 202 | static const uint16_t GPRDecoderTable[] = { |
| 203 | ARM::R0, ARM::R1, ARM::R2, ARM::R3, |
| 204 | ARM::R4, ARM::R5, ARM::R6, ARM::R7, |
| 205 | ARM::R8, ARM::R9, ARM::R10, ARM::R11, |
| 206 | ARM::R12, ARM::SP, ARM::LR, ARM::PC |
| 207 | }; |
| 208 | |
| 209 | static const uint16_t CLRMGPRDecoderTable[] = { |
| 210 | ARM::R0, ARM::R1, ARM::R2, ARM::R3, |
| 211 | ARM::R4, ARM::R5, ARM::R6, ARM::R7, |
| 212 | ARM::R8, ARM::R9, ARM::R10, ARM::R11, |
| 213 | ARM::R12, 0, ARM::LR, ARM::APSR |
| 214 | }; |
| 215 | |
| 216 | static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 217 | uint64_t Address, |
| 218 | const MCDisassembler *Decoder) { |
| 219 | if (RegNo > 15) |
| 220 | return MCDisassembler::Fail; |
| 221 | |
| 222 | unsigned Register = GPRDecoderTable[RegNo]; |
| 223 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 224 | return MCDisassembler::Success; |
| 225 | } |
| 226 | |
| 227 | static DecodeStatus DecodeCLRMGPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 228 | uint64_t Address, |
| 229 | const MCDisassembler *Decoder) { |
| 230 | if (RegNo > 15) |
| 231 | return MCDisassembler::Fail; |
| 232 | |
| 233 | unsigned Register = CLRMGPRDecoderTable[RegNo]; |
| 234 | if (Register == 0) |
| 235 | return MCDisassembler::Fail; |
| 236 | |
| 237 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 238 | return MCDisassembler::Success; |
| 239 | } |
| 240 | |
| 241 | static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo, |
| 242 | uint64_t Address, |
| 243 | const MCDisassembler *Decoder) { |
| 244 | DecodeStatus S = MCDisassembler::Success; |
| 245 | |
| 246 | if (RegNo == 15) |
| 247 | S = MCDisassembler::SoftFail; |
| 248 | |
| 249 | Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder)); |
| 250 | |
| 251 | return S; |
| 252 | } |
| 253 | |
| 254 | static DecodeStatus DecodeGPRnospRegisterClass(MCInst &Inst, unsigned RegNo, |
| 255 | uint64_t Address, |
| 256 | const MCDisassembler *Decoder) { |
| 257 | DecodeStatus S = MCDisassembler::Success; |
| 258 | |
| 259 | if (RegNo == 13) |
| 260 | S = MCDisassembler::SoftFail; |
| 261 | |
| 262 | Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder)); |
| 263 | |
| 264 | return S; |
| 265 | } |
| 266 | |
| 267 | static DecodeStatus |
| 268 | DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, |
| 269 | const MCDisassembler *Decoder) { |
| 270 | DecodeStatus S = MCDisassembler::Success; |
| 271 | |
| 272 | if (RegNo == 15) |
| 273 | { |
| 274 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::APSR_NZCV)); |
| 275 | return MCDisassembler::Success; |
| 276 | } |
| 277 | |
| 278 | Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder)); |
| 279 | return S; |
| 280 | } |
| 281 | |
| 282 | static DecodeStatus |
| 283 | DecodeGPRwithZRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, |
| 284 | const MCDisassembler *Decoder) { |
| 285 | DecodeStatus S = MCDisassembler::Success; |
| 286 | |
| 287 | if (RegNo == 15) |
| 288 | { |
| 289 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::ZR)); |
| 290 | return MCDisassembler::Success; |
| 291 | } |
| 292 | |
| 293 | if (RegNo == 13) |
| 294 | Check(Out&: S, In: MCDisassembler::SoftFail); |
| 295 | |
| 296 | Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder)); |
| 297 | return S; |
| 298 | } |
| 299 | |
| 300 | static DecodeStatus |
| 301 | DecodeGPRwithZRnospRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, |
| 302 | const MCDisassembler *Decoder) { |
| 303 | DecodeStatus S = MCDisassembler::Success; |
| 304 | if (RegNo == 13) |
| 305 | return MCDisassembler::Fail; |
| 306 | Check(Out&: S, In: DecodeGPRwithZRRegisterClass(Inst, RegNo, Address, Decoder)); |
| 307 | return S; |
| 308 | } |
| 309 | |
| 310 | static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 311 | uint64_t Address, |
| 312 | const MCDisassembler *Decoder) { |
| 313 | if (RegNo > 7) |
| 314 | return MCDisassembler::Fail; |
| 315 | return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder); |
| 316 | } |
| 317 | |
| 318 | static const uint16_t GPRPairDecoderTable[] = { |
| 319 | ARM::R0_R1, ARM::R2_R3, ARM::R4_R5, ARM::R6_R7, |
| 320 | ARM::R8_R9, ARM::R10_R11, ARM::R12_SP |
| 321 | }; |
| 322 | |
| 323 | static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo, |
| 324 | uint64_t Address, |
| 325 | const MCDisassembler *Decoder) { |
| 326 | DecodeStatus S = MCDisassembler::Success; |
| 327 | |
| 328 | // According to the Arm ARM RegNo = 14 is undefined, but we return fail |
| 329 | // rather than SoftFail as there is no GPRPair table entry for index 7. |
| 330 | if (RegNo > 13) |
| 331 | return MCDisassembler::Fail; |
| 332 | |
| 333 | if (RegNo & 1) |
| 334 | S = MCDisassembler::SoftFail; |
| 335 | |
| 336 | unsigned RegisterPair = GPRPairDecoderTable[RegNo/2]; |
| 337 | Inst.addOperand(Op: MCOperand::createReg(Reg: RegisterPair)); |
| 338 | return S; |
| 339 | } |
| 340 | |
| 341 | static DecodeStatus |
| 342 | DecodeGPRPairnospRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, |
| 343 | const MCDisassembler *Decoder) { |
| 344 | if (RegNo > 13) |
| 345 | return MCDisassembler::Fail; |
| 346 | |
| 347 | unsigned RegisterPair = GPRPairDecoderTable[RegNo/2]; |
| 348 | Inst.addOperand(Op: MCOperand::createReg(Reg: RegisterPair)); |
| 349 | |
| 350 | if ((RegNo & 1) || RegNo > 10) |
| 351 | return MCDisassembler::SoftFail; |
| 352 | return MCDisassembler::Success; |
| 353 | } |
| 354 | |
| 355 | static DecodeStatus DecodeGPRspRegisterClass(MCInst &Inst, unsigned RegNo, |
| 356 | uint64_t Address, |
| 357 | const MCDisassembler *Decoder) { |
| 358 | if (RegNo != 13) |
| 359 | return MCDisassembler::Fail; |
| 360 | |
| 361 | unsigned Register = GPRDecoderTable[RegNo]; |
| 362 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 363 | return MCDisassembler::Success; |
| 364 | } |
| 365 | |
| 366 | static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 367 | uint64_t Address, |
| 368 | const MCDisassembler *Decoder) { |
| 369 | unsigned Register = 0; |
| 370 | switch (RegNo) { |
| 371 | case 0: |
| 372 | Register = ARM::R0; |
| 373 | break; |
| 374 | case 1: |
| 375 | Register = ARM::R1; |
| 376 | break; |
| 377 | case 2: |
| 378 | Register = ARM::R2; |
| 379 | break; |
| 380 | case 3: |
| 381 | Register = ARM::R3; |
| 382 | break; |
| 383 | case 9: |
| 384 | Register = ARM::R9; |
| 385 | break; |
| 386 | case 12: |
| 387 | Register = ARM::R12; |
| 388 | break; |
| 389 | default: |
| 390 | return MCDisassembler::Fail; |
| 391 | } |
| 392 | |
| 393 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 394 | return MCDisassembler::Success; |
| 395 | } |
| 396 | |
| 397 | static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 398 | uint64_t Address, |
| 399 | const MCDisassembler *Decoder) { |
| 400 | DecodeStatus S = MCDisassembler::Success; |
| 401 | |
| 402 | const FeatureBitset &featureBits = |
| 403 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 404 | |
| 405 | if ((RegNo == 13 && !featureBits[ARM::HasV8Ops]) || RegNo == 15) |
| 406 | S = MCDisassembler::SoftFail; |
| 407 | |
| 408 | Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder)); |
| 409 | return S; |
| 410 | } |
| 411 | |
| 412 | static const MCPhysReg SPRDecoderTable[] = { |
| 413 | ARM::S0, ARM::S1, ARM::S2, ARM::S3, |
| 414 | ARM::S4, ARM::S5, ARM::S6, ARM::S7, |
| 415 | ARM::S8, ARM::S9, ARM::S10, ARM::S11, |
| 416 | ARM::S12, ARM::S13, ARM::S14, ARM::S15, |
| 417 | ARM::S16, ARM::S17, ARM::S18, ARM::S19, |
| 418 | ARM::S20, ARM::S21, ARM::S22, ARM::S23, |
| 419 | ARM::S24, ARM::S25, ARM::S26, ARM::S27, |
| 420 | ARM::S28, ARM::S29, ARM::S30, ARM::S31 |
| 421 | }; |
| 422 | |
| 423 | static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 424 | uint64_t Address, |
| 425 | const MCDisassembler *Decoder) { |
| 426 | if (RegNo > 31) |
| 427 | return MCDisassembler::Fail; |
| 428 | |
| 429 | unsigned Register = SPRDecoderTable[RegNo]; |
| 430 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 431 | return MCDisassembler::Success; |
| 432 | } |
| 433 | |
| 434 | static DecodeStatus DecodeHPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 435 | uint64_t Address, |
| 436 | const MCDisassembler *Decoder) { |
| 437 | return DecodeSPRRegisterClass(Inst, RegNo, Address, Decoder); |
| 438 | } |
| 439 | |
| 440 | static const MCPhysReg DPRDecoderTable[] = { |
| 441 | ARM::D0, ARM::D1, ARM::D2, ARM::D3, |
| 442 | ARM::D4, ARM::D5, ARM::D6, ARM::D7, |
| 443 | ARM::D8, ARM::D9, ARM::D10, ARM::D11, |
| 444 | ARM::D12, ARM::D13, ARM::D14, ARM::D15, |
| 445 | ARM::D16, ARM::D17, ARM::D18, ARM::D19, |
| 446 | ARM::D20, ARM::D21, ARM::D22, ARM::D23, |
| 447 | ARM::D24, ARM::D25, ARM::D26, ARM::D27, |
| 448 | ARM::D28, ARM::D29, ARM::D30, ARM::D31 |
| 449 | }; |
| 450 | |
| 451 | // Does this instruction/subtarget permit use of registers d16-d31? |
| 452 | static bool PermitsD32(const MCInst &Inst, const MCDisassembler *Decoder) { |
| 453 | if (Inst.getOpcode() == ARM::VSCCLRMD || Inst.getOpcode() == ARM::VSCCLRMS) |
| 454 | return true; |
| 455 | const FeatureBitset &featureBits = |
| 456 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 457 | return featureBits[ARM::FeatureD32]; |
| 458 | } |
| 459 | |
| 460 | static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 461 | uint64_t Address, |
| 462 | const MCDisassembler *Decoder) { |
| 463 | if (RegNo > (PermitsD32(Inst, Decoder) ? 31u : 15u)) |
| 464 | return MCDisassembler::Fail; |
| 465 | |
| 466 | unsigned Register = DPRDecoderTable[RegNo]; |
| 467 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 468 | return MCDisassembler::Success; |
| 469 | } |
| 470 | |
| 471 | static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo, |
| 472 | uint64_t Address, |
| 473 | const MCDisassembler *Decoder) { |
| 474 | if (RegNo > 7) |
| 475 | return MCDisassembler::Fail; |
| 476 | return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder); |
| 477 | } |
| 478 | |
| 479 | static DecodeStatus DecodeSPR_8RegisterClass(MCInst &Inst, unsigned RegNo, |
| 480 | uint64_t Address, |
| 481 | const MCDisassembler *Decoder) { |
| 482 | if (RegNo > 15) |
| 483 | return MCDisassembler::Fail; |
| 484 | return DecodeSPRRegisterClass(Inst, RegNo, Address, Decoder); |
| 485 | } |
| 486 | |
| 487 | static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo, |
| 488 | uint64_t Address, |
| 489 | const MCDisassembler *Decoder) { |
| 490 | if (RegNo > 15) |
| 491 | return MCDisassembler::Fail; |
| 492 | return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder); |
| 493 | } |
| 494 | |
| 495 | static const MCPhysReg QPRDecoderTable[] = { |
| 496 | ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3, |
| 497 | ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7, |
| 498 | ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11, |
| 499 | ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15 |
| 500 | }; |
| 501 | |
| 502 | static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 503 | uint64_t Address, |
| 504 | const MCDisassembler *Decoder) { |
| 505 | if (RegNo > 31 || (RegNo & 1) != 0) |
| 506 | return MCDisassembler::Fail; |
| 507 | RegNo >>= 1; |
| 508 | |
| 509 | unsigned Register = QPRDecoderTable[RegNo]; |
| 510 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 511 | return MCDisassembler::Success; |
| 512 | } |
| 513 | |
| 514 | static const MCPhysReg DPairDecoderTable[] = { |
| 515 | ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6, |
| 516 | ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12, |
| 517 | ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18, |
| 518 | ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24, |
| 519 | ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30, |
| 520 | ARM::Q15 |
| 521 | }; |
| 522 | |
| 523 | static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo, |
| 524 | uint64_t Address, |
| 525 | const MCDisassembler *Decoder) { |
| 526 | if (RegNo > 30) |
| 527 | return MCDisassembler::Fail; |
| 528 | |
| 529 | unsigned Register = DPairDecoderTable[RegNo]; |
| 530 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 531 | return MCDisassembler::Success; |
| 532 | } |
| 533 | |
| 534 | static const MCPhysReg DPairSpacedDecoderTable[] = { |
| 535 | ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5, |
| 536 | ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9, |
| 537 | ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13, |
| 538 | ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17, |
| 539 | ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21, |
| 540 | ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25, |
| 541 | ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29, |
| 542 | ARM::D28_D30, ARM::D29_D31 |
| 543 | }; |
| 544 | |
| 545 | static DecodeStatus |
| 546 | DecodeDPairSpacedRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, |
| 547 | const MCDisassembler *Decoder) { |
| 548 | if (RegNo > 29) |
| 549 | return MCDisassembler::Fail; |
| 550 | |
| 551 | unsigned Register = DPairSpacedDecoderTable[RegNo]; |
| 552 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 553 | return MCDisassembler::Success; |
| 554 | } |
| 555 | |
| 556 | static DecodeStatus DecodeMQPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 557 | uint64_t Address, |
| 558 | const MCDisassembler *Decoder) { |
| 559 | if (RegNo > 7) |
| 560 | return MCDisassembler::Fail; |
| 561 | |
| 562 | unsigned Register = QPRDecoderTable[RegNo]; |
| 563 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 564 | return MCDisassembler::Success; |
| 565 | } |
| 566 | |
| 567 | static const MCPhysReg QQPRDecoderTable[] = { |
| 568 | ARM::Q0_Q1, ARM::Q1_Q2, ARM::Q2_Q3, ARM::Q3_Q4, |
| 569 | ARM::Q4_Q5, ARM::Q5_Q6, ARM::Q6_Q7 |
| 570 | }; |
| 571 | |
| 572 | static DecodeStatus DecodeMQQPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 573 | uint64_t Address, |
| 574 | const MCDisassembler *Decoder) { |
| 575 | if (RegNo > 6) |
| 576 | return MCDisassembler::Fail; |
| 577 | |
| 578 | unsigned Register = QQPRDecoderTable[RegNo]; |
| 579 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 580 | return MCDisassembler::Success; |
| 581 | } |
| 582 | |
| 583 | static const MCPhysReg QQQQPRDecoderTable[] = { |
| 584 | ARM::Q0_Q1_Q2_Q3, ARM::Q1_Q2_Q3_Q4, ARM::Q2_Q3_Q4_Q5, |
| 585 | ARM::Q3_Q4_Q5_Q6, ARM::Q4_Q5_Q6_Q7 |
| 586 | }; |
| 587 | |
| 588 | static DecodeStatus DecodeMQQQQPRRegisterClass(MCInst &Inst, unsigned RegNo, |
| 589 | uint64_t Address, |
| 590 | const MCDisassembler *Decoder) { |
| 591 | if (RegNo > 4) |
| 592 | return MCDisassembler::Fail; |
| 593 | |
| 594 | unsigned Register = QQQQPRDecoderTable[RegNo]; |
| 595 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 596 | return MCDisassembler::Success; |
| 597 | } |
| 598 | |
| 599 | // Operand decoding functions. |
| 600 | |
| 601 | static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val, |
| 602 | uint64_t Address, |
| 603 | const MCDisassembler *Decoder) { |
| 604 | DecodeStatus S = MCDisassembler::Success; |
| 605 | if (Val == 0xF) return MCDisassembler::Fail; |
| 606 | // AL predicate is not allowed on Thumb1 branches. |
| 607 | if (Inst.getOpcode() == ARM::tBcc && Val == 0xE) |
| 608 | return MCDisassembler::Fail; |
| 609 | const MCInstrInfo *MCII = |
| 610 | static_cast<const ARMDisassembler *>(Decoder)->MCII.get(); |
| 611 | if (Val != ARMCC::AL && !MCII->get(Opcode: Inst.getOpcode()).isPredicable()) |
| 612 | Check(Out&: S, In: MCDisassembler::SoftFail); |
| 613 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 614 | if (Val == ARMCC::AL) { |
| 615 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::NoRegister)); |
| 616 | } else |
| 617 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::CPSR)); |
| 618 | return S; |
| 619 | } |
| 620 | |
| 621 | // This overload is used to decode a `pred` operand that is not encoded into |
| 622 | // instruction. This is the case for almost all predicable Thumb instructions |
| 623 | // (exceptions are tBcc and t2Bcc). Some predicable Thumb instructions have ARM |
| 624 | // equivalents where they are not predicable (always executed). This function |
| 625 | // is used to decode `pred` operand of these ARM instructions, too. |
| 626 | static DecodeStatus DecodePredicateOperand(MCInst &Inst, |
| 627 | const MCDisassembler *Decoder) { |
| 628 | const auto *D = static_cast<const ARMDisassembler *>(Decoder); |
| 629 | unsigned CC = ARMCC::AL; |
| 630 | if (D->getSubtargetInfo().hasFeature(Feature: ARM::ModeThumb)) |
| 631 | CC = D->ITBlock.getITCC(); |
| 632 | MCRegister CondReg = CC == ARMCC::AL ? ARM::NoRegister : ARM::CPSR; |
| 633 | Inst.addOperand(Op: MCOperand::createImm(Val: CC)); |
| 634 | Inst.addOperand(Op: MCOperand::createReg(Reg: CondReg)); |
| 635 | return MCDisassembler::Success; |
| 636 | } |
| 637 | |
| 638 | static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val, |
| 639 | uint64_t Address, |
| 640 | const MCDisassembler *Decoder) { |
| 641 | if (Val) |
| 642 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::CPSR)); |
| 643 | else |
| 644 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::NoRegister)); |
| 645 | return MCDisassembler::Success; |
| 646 | } |
| 647 | |
| 648 | // This overload is called when decoding `s_cc_out` operand, which is not |
| 649 | // encoded into instruction. It is only used in Thumb1 instructions. |
| 650 | static DecodeStatus DecodeCCOutOperand(MCInst &Inst, |
| 651 | const MCDisassembler *Decoder) { |
| 652 | const auto *D = static_cast<const ARMDisassembler *>(Decoder); |
| 653 | // Thumb1 instructions define CPSR unless they are inside an IT block. |
| 654 | MCRegister CCR = D->ITBlock.instrInITBlock() ? ARM::NoRegister : ARM::CPSR; |
| 655 | Inst.addOperand(Op: MCOperand::createReg(Reg: CCR)); |
| 656 | return MCDisassembler::Success; |
| 657 | } |
| 658 | |
| 659 | static DecodeStatus DecodeVpredNOperand(MCInst &Inst, |
| 660 | const MCDisassembler *Decoder) { |
| 661 | const auto *D = static_cast<const ARMDisassembler *>(Decoder); |
| 662 | unsigned VCC = D->VPTBlock.getVPTPred(); |
| 663 | MCRegister CondReg = VCC == ARMVCC::None ? ARM::NoRegister : ARM::P0; |
| 664 | |
| 665 | Inst.addOperand(Op: MCOperand::createImm(Val: VCC)); // $cond |
| 666 | Inst.addOperand(Op: MCOperand::createReg(Reg: CondReg)); // $cond_reg |
| 667 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::NoRegister)); // $tp_reg |
| 668 | |
| 669 | return MCDisassembler::Success; |
| 670 | } |
| 671 | |
| 672 | static DecodeStatus DecodeVpredROperand(MCInst &Inst, |
| 673 | const MCDisassembler *Decoder) { |
| 674 | const auto *D = static_cast<const ARMDisassembler *>(Decoder); |
| 675 | unsigned VCC = D->VPTBlock.getVPTPred(); |
| 676 | MCRegister CondReg = VCC == ARMVCC::None ? ARM::NoRegister : ARM::P0; |
| 677 | |
| 678 | Inst.addOperand(Op: MCOperand::createImm(Val: VCC)); // $cond |
| 679 | Inst.addOperand(Op: MCOperand::createReg(Reg: CondReg)); // $cond_reg |
| 680 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::NoRegister)); // $tp_reg |
| 681 | |
| 682 | // The last sub-operand ($inactive) is tied to an output operand. |
| 683 | // The output operand has already been decoded, so just copy it. |
| 684 | const MCInstrDesc &MCID = D->MCII->get(Opcode: Inst.getOpcode()); |
| 685 | unsigned InactiveOpIdx = Inst.getNumOperands(); |
| 686 | int TiedOpIdx = MCID.getOperandConstraint(OpNum: InactiveOpIdx, Constraint: MCOI::TIED_TO); |
| 687 | assert(TiedOpIdx >= 0 && |
| 688 | "Inactive register in vpred_r is not tied to an output!" ); |
| 689 | |
| 690 | // Make a copy of the operand to ensure it is not invalidated when MI grows. |
| 691 | Inst.addOperand(Op: MCOperand(Inst.getOperand(i: TiedOpIdx))); // $inactive |
| 692 | |
| 693 | return MCDisassembler::Success; |
| 694 | } |
| 695 | |
| 696 | static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val, |
| 697 | uint64_t Address, |
| 698 | const MCDisassembler *Decoder) { |
| 699 | DecodeStatus S = MCDisassembler::Success; |
| 700 | |
| 701 | unsigned Rm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 4); |
| 702 | unsigned type = fieldFromInstruction(Insn: Val, StartBit: 5, NumBits: 2); |
| 703 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 7, NumBits: 5); |
| 704 | |
| 705 | // Register-immediate |
| 706 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 707 | return MCDisassembler::Fail; |
| 708 | |
| 709 | ARM_AM::ShiftOpc Shift = ARM_AM::lsl; |
| 710 | switch (type) { |
| 711 | case 0: |
| 712 | Shift = ARM_AM::lsl; |
| 713 | break; |
| 714 | case 1: |
| 715 | Shift = ARM_AM::lsr; |
| 716 | break; |
| 717 | case 2: |
| 718 | Shift = ARM_AM::asr; |
| 719 | break; |
| 720 | case 3: |
| 721 | Shift = ARM_AM::ror; |
| 722 | break; |
| 723 | } |
| 724 | |
| 725 | if (Shift == ARM_AM::ror && imm == 0) |
| 726 | Shift = ARM_AM::rrx; |
| 727 | |
| 728 | unsigned Op = Shift | (imm << 3); |
| 729 | Inst.addOperand(Op: MCOperand::createImm(Val: Op)); |
| 730 | |
| 731 | return S; |
| 732 | } |
| 733 | |
| 734 | static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val, |
| 735 | uint64_t Address, |
| 736 | const MCDisassembler *Decoder) { |
| 737 | DecodeStatus S = MCDisassembler::Success; |
| 738 | |
| 739 | unsigned Rm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 4); |
| 740 | unsigned type = fieldFromInstruction(Insn: Val, StartBit: 5, NumBits: 2); |
| 741 | unsigned Rs = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 4); |
| 742 | |
| 743 | // Register-register |
| 744 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 745 | return MCDisassembler::Fail; |
| 746 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rs, Address, Decoder))) |
| 747 | return MCDisassembler::Fail; |
| 748 | |
| 749 | ARM_AM::ShiftOpc Shift = ARM_AM::lsl; |
| 750 | switch (type) { |
| 751 | case 0: |
| 752 | Shift = ARM_AM::lsl; |
| 753 | break; |
| 754 | case 1: |
| 755 | Shift = ARM_AM::lsr; |
| 756 | break; |
| 757 | case 2: |
| 758 | Shift = ARM_AM::asr; |
| 759 | break; |
| 760 | case 3: |
| 761 | Shift = ARM_AM::ror; |
| 762 | break; |
| 763 | } |
| 764 | |
| 765 | Inst.addOperand(Op: MCOperand::createImm(Val: Shift)); |
| 766 | |
| 767 | return S; |
| 768 | } |
| 769 | |
| 770 | static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val, |
| 771 | uint64_t Address, |
| 772 | const MCDisassembler *Decoder) { |
| 773 | DecodeStatus S = MCDisassembler::Success; |
| 774 | |
| 775 | bool NeedDisjointWriteback = false; |
| 776 | MCRegister WritebackReg; |
| 777 | bool CLRM = false; |
| 778 | switch (Inst.getOpcode()) { |
| 779 | default: |
| 780 | break; |
| 781 | case ARM::LDMIA_UPD: |
| 782 | case ARM::LDMDB_UPD: |
| 783 | case ARM::LDMIB_UPD: |
| 784 | case ARM::LDMDA_UPD: |
| 785 | case ARM::t2LDMIA_UPD: |
| 786 | case ARM::t2LDMDB_UPD: |
| 787 | case ARM::t2STMIA_UPD: |
| 788 | case ARM::t2STMDB_UPD: |
| 789 | NeedDisjointWriteback = true; |
| 790 | WritebackReg = Inst.getOperand(i: 0).getReg(); |
| 791 | break; |
| 792 | case ARM::t2CLRM: |
| 793 | CLRM = true; |
| 794 | break; |
| 795 | } |
| 796 | |
| 797 | // Empty register lists are not allowed. |
| 798 | if (Val == 0) return MCDisassembler::Fail; |
| 799 | for (unsigned i = 0; i < 16; ++i) { |
| 800 | if (Val & (1 << i)) { |
| 801 | if (CLRM) { |
| 802 | if (!Check(Out&: S, In: DecodeCLRMGPRRegisterClass(Inst, RegNo: i, Address, Decoder))) { |
| 803 | return MCDisassembler::Fail; |
| 804 | } |
| 805 | } else { |
| 806 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: i, Address, Decoder))) |
| 807 | return MCDisassembler::Fail; |
| 808 | // Writeback not allowed if Rn is in the target list. |
| 809 | if (NeedDisjointWriteback && WritebackReg == Inst.end()[-1].getReg()) |
| 810 | Check(Out&: S, In: MCDisassembler::SoftFail); |
| 811 | } |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | return S; |
| 816 | } |
| 817 | |
| 818 | static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val, |
| 819 | uint64_t Address, |
| 820 | const MCDisassembler *Decoder) { |
| 821 | DecodeStatus S = MCDisassembler::Success; |
| 822 | |
| 823 | unsigned Vd = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 5); |
| 824 | unsigned regs = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 8); |
| 825 | |
| 826 | // In case of unpredictable encoding, tweak the operands. |
| 827 | if (regs == 0 || (Vd + regs) > 32) { |
| 828 | regs = Vd + regs > 32 ? 32 - Vd : regs; |
| 829 | regs = std::max( a: 1u, b: regs); |
| 830 | S = MCDisassembler::SoftFail; |
| 831 | } |
| 832 | |
| 833 | if (!Check(Out&: S, In: DecodeSPRRegisterClass(Inst, RegNo: Vd, Address, Decoder))) |
| 834 | return MCDisassembler::Fail; |
| 835 | for (unsigned i = 0; i < (regs - 1); ++i) { |
| 836 | if (!Check(Out&: S, In: DecodeSPRRegisterClass(Inst, RegNo: ++Vd, Address, Decoder))) |
| 837 | return MCDisassembler::Fail; |
| 838 | } |
| 839 | |
| 840 | return S; |
| 841 | } |
| 842 | |
| 843 | static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val, |
| 844 | uint64_t Address, |
| 845 | const MCDisassembler *Decoder) { |
| 846 | DecodeStatus S = MCDisassembler::Success; |
| 847 | |
| 848 | unsigned Vd = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 5); |
| 849 | unsigned regs = fieldFromInstruction(Insn: Val, StartBit: 1, NumBits: 7); |
| 850 | |
| 851 | // In case of unpredictable encoding, tweak the operands. |
| 852 | unsigned MaxReg = PermitsD32(Inst, Decoder) ? 32 : 16; |
| 853 | if (regs == 0 || (Vd + regs) > MaxReg) { |
| 854 | regs = Vd + regs > MaxReg ? MaxReg - Vd : regs; |
| 855 | regs = std::max( a: 1u, b: regs); |
| 856 | regs = std::min(a: MaxReg, b: regs); |
| 857 | S = MCDisassembler::SoftFail; |
| 858 | } |
| 859 | |
| 860 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Vd, Address, Decoder))) |
| 861 | return MCDisassembler::Fail; |
| 862 | for (unsigned i = 0; i < (regs - 1); ++i) { |
| 863 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: ++Vd, Address, Decoder))) |
| 864 | return MCDisassembler::Fail; |
| 865 | } |
| 866 | |
| 867 | return S; |
| 868 | } |
| 869 | |
| 870 | static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val, |
| 871 | uint64_t Address, |
| 872 | const MCDisassembler *Decoder) { |
| 873 | // This operand encodes a mask of contiguous zeros between a specified MSB |
| 874 | // and LSB. To decode it, we create the mask of all bits MSB-and-lower, |
| 875 | // the mask of all bits LSB-and-lower, and then xor them to create |
| 876 | // the mask of that's all ones on [msb, lsb]. Finally we not it to |
| 877 | // create the final mask. |
| 878 | unsigned msb = fieldFromInstruction(Insn: Val, StartBit: 5, NumBits: 5); |
| 879 | unsigned lsb = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 5); |
| 880 | |
| 881 | DecodeStatus S = MCDisassembler::Success; |
| 882 | if (lsb > msb) { |
| 883 | Check(Out&: S, In: MCDisassembler::SoftFail); |
| 884 | // The check above will cause the warning for the "potentially undefined |
| 885 | // instruction encoding" but we can't build a bad MCOperand value here |
| 886 | // with a lsb > msb or else printing the MCInst will cause a crash. |
| 887 | lsb = msb; |
| 888 | } |
| 889 | |
| 890 | uint32_t msb_mask = 0xFFFFFFFF; |
| 891 | if (msb != 31) msb_mask = (1U << (msb+1)) - 1; |
| 892 | uint32_t lsb_mask = (1U << lsb) - 1; |
| 893 | |
| 894 | Inst.addOperand(Op: MCOperand::createImm(Val: ~(msb_mask ^ lsb_mask))); |
| 895 | return S; |
| 896 | } |
| 897 | |
| 898 | static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn, |
| 899 | uint64_t Address, |
| 900 | const MCDisassembler *Decoder) { |
| 901 | DecodeStatus S = MCDisassembler::Success; |
| 902 | |
| 903 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 904 | unsigned CRd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 905 | unsigned coproc = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 906 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 907 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 908 | unsigned U = fieldFromInstruction(Insn, StartBit: 23, NumBits: 1); |
| 909 | const FeatureBitset &featureBits = |
| 910 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 911 | |
| 912 | switch (Inst.getOpcode()) { |
| 913 | case ARM::LDC_OFFSET: |
| 914 | case ARM::LDC_PRE: |
| 915 | case ARM::LDC_POST: |
| 916 | case ARM::LDC_OPTION: |
| 917 | case ARM::LDCL_OFFSET: |
| 918 | case ARM::LDCL_PRE: |
| 919 | case ARM::LDCL_POST: |
| 920 | case ARM::LDCL_OPTION: |
| 921 | case ARM::STC_OFFSET: |
| 922 | case ARM::STC_PRE: |
| 923 | case ARM::STC_POST: |
| 924 | case ARM::STC_OPTION: |
| 925 | case ARM::STCL_OFFSET: |
| 926 | case ARM::STCL_PRE: |
| 927 | case ARM::STCL_POST: |
| 928 | case ARM::STCL_OPTION: |
| 929 | case ARM::t2LDC_OFFSET: |
| 930 | case ARM::t2LDC_PRE: |
| 931 | case ARM::t2LDC_POST: |
| 932 | case ARM::t2LDC_OPTION: |
| 933 | case ARM::t2LDCL_OFFSET: |
| 934 | case ARM::t2LDCL_PRE: |
| 935 | case ARM::t2LDCL_POST: |
| 936 | case ARM::t2LDCL_OPTION: |
| 937 | case ARM::t2STC_OFFSET: |
| 938 | case ARM::t2STC_PRE: |
| 939 | case ARM::t2STC_POST: |
| 940 | case ARM::t2STC_OPTION: |
| 941 | case ARM::t2STCL_OFFSET: |
| 942 | case ARM::t2STCL_PRE: |
| 943 | case ARM::t2STCL_POST: |
| 944 | case ARM::t2STCL_OPTION: |
| 945 | case ARM::t2LDC2_OFFSET: |
| 946 | case ARM::t2LDC2L_OFFSET: |
| 947 | case ARM::t2LDC2_PRE: |
| 948 | case ARM::t2LDC2L_PRE: |
| 949 | case ARM::t2STC2_OFFSET: |
| 950 | case ARM::t2STC2L_OFFSET: |
| 951 | case ARM::t2STC2_PRE: |
| 952 | case ARM::t2STC2L_PRE: |
| 953 | case ARM::LDC2_OFFSET: |
| 954 | case ARM::LDC2L_OFFSET: |
| 955 | case ARM::LDC2_PRE: |
| 956 | case ARM::LDC2L_PRE: |
| 957 | case ARM::STC2_OFFSET: |
| 958 | case ARM::STC2L_OFFSET: |
| 959 | case ARM::STC2_PRE: |
| 960 | case ARM::STC2L_PRE: |
| 961 | case ARM::t2LDC2_OPTION: |
| 962 | case ARM::t2STC2_OPTION: |
| 963 | case ARM::t2LDC2_POST: |
| 964 | case ARM::t2LDC2L_POST: |
| 965 | case ARM::t2STC2_POST: |
| 966 | case ARM::t2STC2L_POST: |
| 967 | case ARM::LDC2_POST: |
| 968 | case ARM::LDC2L_POST: |
| 969 | case ARM::STC2_POST: |
| 970 | case ARM::STC2L_POST: |
| 971 | if (coproc == 0xA || coproc == 0xB || |
| 972 | (featureBits[ARM::HasV8_1MMainlineOps] && |
| 973 | (coproc == 0x8 || coproc == 0x9 || coproc == 0xA || coproc == 0xB || |
| 974 | coproc == 0xE || coproc == 0xF))) |
| 975 | return MCDisassembler::Fail; |
| 976 | break; |
| 977 | default: |
| 978 | break; |
| 979 | } |
| 980 | |
| 981 | if (featureBits[ARM::HasV8Ops] && (coproc != 14)) |
| 982 | return MCDisassembler::Fail; |
| 983 | |
| 984 | Inst.addOperand(Op: MCOperand::createImm(Val: coproc)); |
| 985 | Inst.addOperand(Op: MCOperand::createImm(Val: CRd)); |
| 986 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 987 | return MCDisassembler::Fail; |
| 988 | |
| 989 | switch (Inst.getOpcode()) { |
| 990 | case ARM::t2LDC2_OFFSET: |
| 991 | case ARM::t2LDC2L_OFFSET: |
| 992 | case ARM::t2LDC2_PRE: |
| 993 | case ARM::t2LDC2L_PRE: |
| 994 | case ARM::t2STC2_OFFSET: |
| 995 | case ARM::t2STC2L_OFFSET: |
| 996 | case ARM::t2STC2_PRE: |
| 997 | case ARM::t2STC2L_PRE: |
| 998 | case ARM::LDC2_OFFSET: |
| 999 | case ARM::LDC2L_OFFSET: |
| 1000 | case ARM::LDC2_PRE: |
| 1001 | case ARM::LDC2L_PRE: |
| 1002 | case ARM::STC2_OFFSET: |
| 1003 | case ARM::STC2L_OFFSET: |
| 1004 | case ARM::STC2_PRE: |
| 1005 | case ARM::STC2L_PRE: |
| 1006 | case ARM::t2LDC_OFFSET: |
| 1007 | case ARM::t2LDCL_OFFSET: |
| 1008 | case ARM::t2LDC_PRE: |
| 1009 | case ARM::t2LDCL_PRE: |
| 1010 | case ARM::t2STC_OFFSET: |
| 1011 | case ARM::t2STCL_OFFSET: |
| 1012 | case ARM::t2STC_PRE: |
| 1013 | case ARM::t2STCL_PRE: |
| 1014 | case ARM::LDC_OFFSET: |
| 1015 | case ARM::LDCL_OFFSET: |
| 1016 | case ARM::LDC_PRE: |
| 1017 | case ARM::LDCL_PRE: |
| 1018 | case ARM::STC_OFFSET: |
| 1019 | case ARM::STCL_OFFSET: |
| 1020 | case ARM::STC_PRE: |
| 1021 | case ARM::STCL_PRE: |
| 1022 | imm = ARM_AM::getAM5Opc(Opc: U ? ARM_AM::add : ARM_AM::sub, Offset: imm); |
| 1023 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 1024 | break; |
| 1025 | case ARM::t2LDC2_POST: |
| 1026 | case ARM::t2LDC2L_POST: |
| 1027 | case ARM::t2STC2_POST: |
| 1028 | case ARM::t2STC2L_POST: |
| 1029 | case ARM::LDC2_POST: |
| 1030 | case ARM::LDC2L_POST: |
| 1031 | case ARM::STC2_POST: |
| 1032 | case ARM::STC2L_POST: |
| 1033 | case ARM::t2LDC_POST: |
| 1034 | case ARM::t2LDCL_POST: |
| 1035 | case ARM::t2STC_POST: |
| 1036 | case ARM::t2STCL_POST: |
| 1037 | case ARM::LDC_POST: |
| 1038 | case ARM::LDCL_POST: |
| 1039 | case ARM::STC_POST: |
| 1040 | case ARM::STCL_POST: |
| 1041 | imm |= U << 8; |
| 1042 | [[fallthrough]]; |
| 1043 | default: |
| 1044 | // The 'option' variant doesn't encode 'U' in the immediate since |
| 1045 | // the immediate is unsigned [0,255]. |
| 1046 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 1047 | break; |
| 1048 | } |
| 1049 | |
| 1050 | switch (Inst.getOpcode()) { |
| 1051 | case ARM::LDC_OFFSET: |
| 1052 | case ARM::LDC_PRE: |
| 1053 | case ARM::LDC_POST: |
| 1054 | case ARM::LDC_OPTION: |
| 1055 | case ARM::LDCL_OFFSET: |
| 1056 | case ARM::LDCL_PRE: |
| 1057 | case ARM::LDCL_POST: |
| 1058 | case ARM::LDCL_OPTION: |
| 1059 | case ARM::STC_OFFSET: |
| 1060 | case ARM::STC_PRE: |
| 1061 | case ARM::STC_POST: |
| 1062 | case ARM::STC_OPTION: |
| 1063 | case ARM::STCL_OFFSET: |
| 1064 | case ARM::STCL_PRE: |
| 1065 | case ARM::STCL_POST: |
| 1066 | case ARM::STCL_OPTION: |
| 1067 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 1068 | return MCDisassembler::Fail; |
| 1069 | break; |
| 1070 | case ARM::t2LDC2L_OFFSET: |
| 1071 | case ARM::t2LDC2L_OPTION: |
| 1072 | case ARM::t2LDC2L_POST: |
| 1073 | case ARM::t2LDC2L_PRE: |
| 1074 | case ARM::t2LDC2_OFFSET: |
| 1075 | case ARM::t2LDC2_OPTION: |
| 1076 | case ARM::t2LDC2_POST: |
| 1077 | case ARM::t2LDC2_PRE: |
| 1078 | case ARM::t2LDCL_OFFSET: |
| 1079 | case ARM::t2LDCL_OPTION: |
| 1080 | case ARM::t2LDCL_POST: |
| 1081 | case ARM::t2LDCL_PRE: |
| 1082 | case ARM::t2LDC_OFFSET: |
| 1083 | case ARM::t2LDC_OPTION: |
| 1084 | case ARM::t2LDC_POST: |
| 1085 | case ARM::t2LDC_PRE: |
| 1086 | case ARM::t2STC2L_OFFSET: |
| 1087 | case ARM::t2STC2L_OPTION: |
| 1088 | case ARM::t2STC2L_POST: |
| 1089 | case ARM::t2STC2L_PRE: |
| 1090 | case ARM::t2STC2_OFFSET: |
| 1091 | case ARM::t2STC2_OPTION: |
| 1092 | case ARM::t2STC2_POST: |
| 1093 | case ARM::t2STC2_PRE: |
| 1094 | case ARM::t2STCL_OFFSET: |
| 1095 | case ARM::t2STCL_OPTION: |
| 1096 | case ARM::t2STCL_POST: |
| 1097 | case ARM::t2STCL_PRE: |
| 1098 | case ARM::t2STC_OFFSET: |
| 1099 | case ARM::t2STC_OPTION: |
| 1100 | case ARM::t2STC_POST: |
| 1101 | case ARM::t2STC_PRE: |
| 1102 | DecodePredicateOperand(Inst, Decoder); |
| 1103 | break; |
| 1104 | default: |
| 1105 | break; |
| 1106 | } |
| 1107 | |
| 1108 | return S; |
| 1109 | } |
| 1110 | |
| 1111 | static DecodeStatus |
| 1112 | DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 1113 | const MCDisassembler *Decoder) { |
| 1114 | DecodeStatus S = MCDisassembler::Success; |
| 1115 | |
| 1116 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 1117 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 1118 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 1119 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 12); |
| 1120 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 1121 | unsigned reg = fieldFromInstruction(Insn, StartBit: 25, NumBits: 1); |
| 1122 | unsigned P = fieldFromInstruction(Insn, StartBit: 24, NumBits: 1); |
| 1123 | unsigned W = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 1124 | |
| 1125 | // On stores, the writeback operand precedes Rt. |
| 1126 | switch (Inst.getOpcode()) { |
| 1127 | case ARM::STR_POST_IMM: |
| 1128 | case ARM::STR_POST_REG: |
| 1129 | case ARM::STRB_POST_IMM: |
| 1130 | case ARM::STRB_POST_REG: |
| 1131 | case ARM::STRT_POST_REG: |
| 1132 | case ARM::STRT_POST_IMM: |
| 1133 | case ARM::STRBT_POST_REG: |
| 1134 | case ARM::STRBT_POST_IMM: |
| 1135 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1136 | return MCDisassembler::Fail; |
| 1137 | break; |
| 1138 | default: |
| 1139 | break; |
| 1140 | } |
| 1141 | |
| 1142 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 1143 | return MCDisassembler::Fail; |
| 1144 | |
| 1145 | // On loads, the writeback operand comes after Rt. |
| 1146 | switch (Inst.getOpcode()) { |
| 1147 | case ARM::LDR_POST_IMM: |
| 1148 | case ARM::LDR_POST_REG: |
| 1149 | case ARM::LDRB_POST_IMM: |
| 1150 | case ARM::LDRB_POST_REG: |
| 1151 | case ARM::LDRBT_POST_REG: |
| 1152 | case ARM::LDRBT_POST_IMM: |
| 1153 | case ARM::LDRT_POST_REG: |
| 1154 | case ARM::LDRT_POST_IMM: |
| 1155 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1156 | return MCDisassembler::Fail; |
| 1157 | break; |
| 1158 | default: |
| 1159 | break; |
| 1160 | } |
| 1161 | |
| 1162 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1163 | return MCDisassembler::Fail; |
| 1164 | |
| 1165 | ARM_AM::AddrOpc Op = ARM_AM::add; |
| 1166 | if (!fieldFromInstruction(Insn, StartBit: 23, NumBits: 1)) |
| 1167 | Op = ARM_AM::sub; |
| 1168 | |
| 1169 | bool writeback = (P == 0) || (W == 1); |
| 1170 | unsigned idx_mode = 0; |
| 1171 | if (P && writeback) |
| 1172 | idx_mode = ARMII::IndexModePre; |
| 1173 | else if (!P && writeback) |
| 1174 | idx_mode = ARMII::IndexModePost; |
| 1175 | |
| 1176 | if (writeback && (Rn == 15 || Rn == Rt)) |
| 1177 | S = MCDisassembler::SoftFail; // UNPREDICTABLE |
| 1178 | |
| 1179 | if (reg) { |
| 1180 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 1181 | return MCDisassembler::Fail; |
| 1182 | ARM_AM::ShiftOpc Opc = ARM_AM::lsl; |
| 1183 | switch( fieldFromInstruction(Insn, StartBit: 5, NumBits: 2)) { |
| 1184 | case 0: |
| 1185 | Opc = ARM_AM::lsl; |
| 1186 | break; |
| 1187 | case 1: |
| 1188 | Opc = ARM_AM::lsr; |
| 1189 | break; |
| 1190 | case 2: |
| 1191 | Opc = ARM_AM::asr; |
| 1192 | break; |
| 1193 | case 3: |
| 1194 | Opc = ARM_AM::ror; |
| 1195 | break; |
| 1196 | default: |
| 1197 | return MCDisassembler::Fail; |
| 1198 | } |
| 1199 | unsigned amt = fieldFromInstruction(Insn, StartBit: 7, NumBits: 5); |
| 1200 | if (Opc == ARM_AM::ror && amt == 0) |
| 1201 | Opc = ARM_AM::rrx; |
| 1202 | unsigned imm = ARM_AM::getAM2Opc(Opc: Op, Imm12: amt, SO: Opc, IdxMode: idx_mode); |
| 1203 | |
| 1204 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 1205 | } else { |
| 1206 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 1207 | unsigned tmp = ARM_AM::getAM2Opc(Opc: Op, Imm12: imm, SO: ARM_AM::lsl, IdxMode: idx_mode); |
| 1208 | Inst.addOperand(Op: MCOperand::createImm(Val: tmp)); |
| 1209 | } |
| 1210 | |
| 1211 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 1212 | return MCDisassembler::Fail; |
| 1213 | |
| 1214 | return S; |
| 1215 | } |
| 1216 | |
| 1217 | static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val, |
| 1218 | uint64_t Address, |
| 1219 | const MCDisassembler *Decoder) { |
| 1220 | DecodeStatus S = MCDisassembler::Success; |
| 1221 | |
| 1222 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 13, NumBits: 4); |
| 1223 | unsigned Rm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 4); |
| 1224 | unsigned type = fieldFromInstruction(Insn: Val, StartBit: 5, NumBits: 2); |
| 1225 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 7, NumBits: 5); |
| 1226 | unsigned U = fieldFromInstruction(Insn: Val, StartBit: 12, NumBits: 1); |
| 1227 | |
| 1228 | ARM_AM::ShiftOpc ShOp = ARM_AM::lsl; |
| 1229 | switch (type) { |
| 1230 | case 0: |
| 1231 | ShOp = ARM_AM::lsl; |
| 1232 | break; |
| 1233 | case 1: |
| 1234 | ShOp = ARM_AM::lsr; |
| 1235 | break; |
| 1236 | case 2: |
| 1237 | ShOp = ARM_AM::asr; |
| 1238 | break; |
| 1239 | case 3: |
| 1240 | ShOp = ARM_AM::ror; |
| 1241 | break; |
| 1242 | } |
| 1243 | |
| 1244 | if (ShOp == ARM_AM::ror && imm == 0) |
| 1245 | ShOp = ARM_AM::rrx; |
| 1246 | |
| 1247 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1248 | return MCDisassembler::Fail; |
| 1249 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 1250 | return MCDisassembler::Fail; |
| 1251 | unsigned shift; |
| 1252 | if (U) |
| 1253 | shift = ARM_AM::getAM2Opc(Opc: ARM_AM::add, Imm12: imm, SO: ShOp); |
| 1254 | else |
| 1255 | shift = ARM_AM::getAM2Opc(Opc: ARM_AM::sub, Imm12: imm, SO: ShOp); |
| 1256 | Inst.addOperand(Op: MCOperand::createImm(Val: shift)); |
| 1257 | |
| 1258 | return S; |
| 1259 | } |
| 1260 | |
| 1261 | static DecodeStatus DecodeTSBInstruction(MCInst &Inst, unsigned Insn, |
| 1262 | uint64_t Address, |
| 1263 | const MCDisassembler *Decoder) { |
| 1264 | if (Inst.getOpcode() != ARM::TSB && Inst.getOpcode() != ARM::t2TSB) |
| 1265 | return MCDisassembler::Fail; |
| 1266 | |
| 1267 | // The "csync" operand is not encoded into the "tsb" instruction (as this is |
| 1268 | // the only available operand), but LLVM expects the instruction to have one |
| 1269 | // operand, so we need to add the csync when decoding. |
| 1270 | Inst.addOperand(Op: MCOperand::createImm(Val: ARM_TSB::CSYNC)); |
| 1271 | if (Inst.getOpcode() == ARM::t2TSB) |
| 1272 | DecodePredicateOperand(Inst, Decoder); |
| 1273 | return MCDisassembler::Success; |
| 1274 | } |
| 1275 | |
| 1276 | static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn, |
| 1277 | uint64_t Address, |
| 1278 | const MCDisassembler *Decoder) { |
| 1279 | DecodeStatus S = MCDisassembler::Success; |
| 1280 | |
| 1281 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 1282 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 1283 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 1284 | unsigned type = fieldFromInstruction(Insn, StartBit: 22, NumBits: 1); |
| 1285 | unsigned imm = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 1286 | unsigned U = ((~fieldFromInstruction(Insn, StartBit: 23, NumBits: 1)) & 1) << 8; |
| 1287 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 1288 | unsigned W = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 1289 | unsigned P = fieldFromInstruction(Insn, StartBit: 24, NumBits: 1); |
| 1290 | unsigned Rt2 = Rt + 1; |
| 1291 | |
| 1292 | bool writeback = (W == 1) | (P == 0); |
| 1293 | |
| 1294 | // For {LD,ST}RD, Rt must be even, else undefined. |
| 1295 | switch (Inst.getOpcode()) { |
| 1296 | case ARM::STRD: |
| 1297 | case ARM::STRD_PRE: |
| 1298 | case ARM::STRD_POST: |
| 1299 | case ARM::LDRD: |
| 1300 | case ARM::LDRD_PRE: |
| 1301 | case ARM::LDRD_POST: |
| 1302 | if (Rt & 0x1) S = MCDisassembler::SoftFail; |
| 1303 | break; |
| 1304 | default: |
| 1305 | break; |
| 1306 | } |
| 1307 | switch (Inst.getOpcode()) { |
| 1308 | case ARM::STRD: |
| 1309 | case ARM::STRD_PRE: |
| 1310 | case ARM::STRD_POST: |
| 1311 | if (P == 0 && W == 1) |
| 1312 | S = MCDisassembler::SoftFail; |
| 1313 | |
| 1314 | if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2)) |
| 1315 | S = MCDisassembler::SoftFail; |
| 1316 | if (type && Rm == 15) |
| 1317 | S = MCDisassembler::SoftFail; |
| 1318 | if (Rt2 == 15) |
| 1319 | S = MCDisassembler::SoftFail; |
| 1320 | if (!type && fieldFromInstruction(Insn, StartBit: 8, NumBits: 4)) |
| 1321 | S = MCDisassembler::SoftFail; |
| 1322 | break; |
| 1323 | case ARM::STRH: |
| 1324 | case ARM::STRH_PRE: |
| 1325 | case ARM::STRH_POST: |
| 1326 | if (Rt == 15) |
| 1327 | S = MCDisassembler::SoftFail; |
| 1328 | if (writeback && (Rn == 15 || Rn == Rt)) |
| 1329 | S = MCDisassembler::SoftFail; |
| 1330 | if (!type && Rm == 15) |
| 1331 | S = MCDisassembler::SoftFail; |
| 1332 | break; |
| 1333 | case ARM::LDRD: |
| 1334 | case ARM::LDRD_PRE: |
| 1335 | case ARM::LDRD_POST: |
| 1336 | if (type && Rn == 15) { |
| 1337 | if (Rt2 == 15) |
| 1338 | S = MCDisassembler::SoftFail; |
| 1339 | break; |
| 1340 | } |
| 1341 | if (P == 0 && W == 1) |
| 1342 | S = MCDisassembler::SoftFail; |
| 1343 | if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2)) |
| 1344 | S = MCDisassembler::SoftFail; |
| 1345 | if (!type && writeback && Rn == 15) |
| 1346 | S = MCDisassembler::SoftFail; |
| 1347 | if (writeback && (Rn == Rt || Rn == Rt2)) |
| 1348 | S = MCDisassembler::SoftFail; |
| 1349 | break; |
| 1350 | case ARM::LDRH: |
| 1351 | case ARM::LDRH_PRE: |
| 1352 | case ARM::LDRH_POST: |
| 1353 | if (type && Rn == 15) { |
| 1354 | if (Rt == 15) |
| 1355 | S = MCDisassembler::SoftFail; |
| 1356 | break; |
| 1357 | } |
| 1358 | if (Rt == 15) |
| 1359 | S = MCDisassembler::SoftFail; |
| 1360 | if (!type && Rm == 15) |
| 1361 | S = MCDisassembler::SoftFail; |
| 1362 | if (!type && writeback && (Rn == 15 || Rn == Rt)) |
| 1363 | S = MCDisassembler::SoftFail; |
| 1364 | break; |
| 1365 | case ARM::LDRSH: |
| 1366 | case ARM::LDRSH_PRE: |
| 1367 | case ARM::LDRSH_POST: |
| 1368 | case ARM::LDRSB: |
| 1369 | case ARM::LDRSB_PRE: |
| 1370 | case ARM::LDRSB_POST: |
| 1371 | if (type && Rn == 15) { |
| 1372 | if (Rt == 15) |
| 1373 | S = MCDisassembler::SoftFail; |
| 1374 | break; |
| 1375 | } |
| 1376 | if (type && (Rt == 15 || (writeback && Rn == Rt))) |
| 1377 | S = MCDisassembler::SoftFail; |
| 1378 | if (!type && (Rt == 15 || Rm == 15)) |
| 1379 | S = MCDisassembler::SoftFail; |
| 1380 | if (!type && writeback && (Rn == 15 || Rn == Rt)) |
| 1381 | S = MCDisassembler::SoftFail; |
| 1382 | break; |
| 1383 | default: |
| 1384 | break; |
| 1385 | } |
| 1386 | |
| 1387 | if (writeback) { // Writeback |
| 1388 | if (P) |
| 1389 | U |= ARMII::IndexModePre << 9; |
| 1390 | else |
| 1391 | U |= ARMII::IndexModePost << 9; |
| 1392 | |
| 1393 | // On stores, the writeback operand precedes Rt. |
| 1394 | switch (Inst.getOpcode()) { |
| 1395 | case ARM::STRD: |
| 1396 | case ARM::STRD_PRE: |
| 1397 | case ARM::STRD_POST: |
| 1398 | case ARM::STRH: |
| 1399 | case ARM::STRH_PRE: |
| 1400 | case ARM::STRH_POST: |
| 1401 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1402 | return MCDisassembler::Fail; |
| 1403 | break; |
| 1404 | default: |
| 1405 | break; |
| 1406 | } |
| 1407 | } |
| 1408 | |
| 1409 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 1410 | return MCDisassembler::Fail; |
| 1411 | switch (Inst.getOpcode()) { |
| 1412 | case ARM::STRD: |
| 1413 | case ARM::STRD_PRE: |
| 1414 | case ARM::STRD_POST: |
| 1415 | case ARM::LDRD: |
| 1416 | case ARM::LDRD_PRE: |
| 1417 | case ARM::LDRD_POST: |
| 1418 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt+1, Address, Decoder))) |
| 1419 | return MCDisassembler::Fail; |
| 1420 | break; |
| 1421 | default: |
| 1422 | break; |
| 1423 | } |
| 1424 | |
| 1425 | if (writeback) { |
| 1426 | // On loads, the writeback operand comes after Rt. |
| 1427 | switch (Inst.getOpcode()) { |
| 1428 | case ARM::LDRD: |
| 1429 | case ARM::LDRD_PRE: |
| 1430 | case ARM::LDRD_POST: |
| 1431 | case ARM::LDRH: |
| 1432 | case ARM::LDRH_PRE: |
| 1433 | case ARM::LDRH_POST: |
| 1434 | case ARM::LDRSH: |
| 1435 | case ARM::LDRSH_PRE: |
| 1436 | case ARM::LDRSH_POST: |
| 1437 | case ARM::LDRSB: |
| 1438 | case ARM::LDRSB_PRE: |
| 1439 | case ARM::LDRSB_POST: |
| 1440 | case ARM::LDRHTr: |
| 1441 | case ARM::LDRSBTr: |
| 1442 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1443 | return MCDisassembler::Fail; |
| 1444 | break; |
| 1445 | default: |
| 1446 | break; |
| 1447 | } |
| 1448 | } |
| 1449 | |
| 1450 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1451 | return MCDisassembler::Fail; |
| 1452 | |
| 1453 | if (type) { |
| 1454 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 1455 | Inst.addOperand(Op: MCOperand::createImm(Val: U | (imm << 4) | Rm)); |
| 1456 | } else { |
| 1457 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 1458 | return MCDisassembler::Fail; |
| 1459 | Inst.addOperand(Op: MCOperand::createImm(Val: U)); |
| 1460 | } |
| 1461 | |
| 1462 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 1463 | return MCDisassembler::Fail; |
| 1464 | |
| 1465 | return S; |
| 1466 | } |
| 1467 | |
| 1468 | static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn, |
| 1469 | uint64_t Address, |
| 1470 | const MCDisassembler *Decoder) { |
| 1471 | DecodeStatus S = MCDisassembler::Success; |
| 1472 | |
| 1473 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 1474 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1475 | return MCDisassembler::Fail; |
| 1476 | |
| 1477 | return S; |
| 1478 | } |
| 1479 | |
| 1480 | static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn, |
| 1481 | uint64_t Address, |
| 1482 | const MCDisassembler *Decoder) { |
| 1483 | unsigned imod = fieldFromInstruction(Insn, StartBit: 18, NumBits: 2); |
| 1484 | unsigned M = fieldFromInstruction(Insn, StartBit: 17, NumBits: 1); |
| 1485 | unsigned iflags = fieldFromInstruction(Insn, StartBit: 6, NumBits: 3); |
| 1486 | unsigned mode = fieldFromInstruction(Insn, StartBit: 0, NumBits: 5); |
| 1487 | |
| 1488 | DecodeStatus S = MCDisassembler::Success; |
| 1489 | |
| 1490 | // This decoder is called from multiple location that do not check |
| 1491 | // the full encoding is valid before they do. |
| 1492 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) != 0 || |
| 1493 | fieldFromInstruction(Insn, StartBit: 16, NumBits: 1) != 0 || |
| 1494 | fieldFromInstruction(Insn, StartBit: 20, NumBits: 8) != 0x10) |
| 1495 | return MCDisassembler::Fail; |
| 1496 | |
| 1497 | // imod == '01' --> UNPREDICTABLE |
| 1498 | // NOTE: Even though this is technically UNPREDICTABLE, we choose to |
| 1499 | // return failure here. The '01' imod value is unprintable, so there's |
| 1500 | // nothing useful we could do even if we returned UNPREDICTABLE. |
| 1501 | |
| 1502 | if (imod == 1) return MCDisassembler::Fail; |
| 1503 | |
| 1504 | if (imod && M) { |
| 1505 | Inst.setOpcode(ARM::CPS3p); |
| 1506 | Inst.addOperand(Op: MCOperand::createImm(Val: imod)); |
| 1507 | Inst.addOperand(Op: MCOperand::createImm(Val: iflags)); |
| 1508 | Inst.addOperand(Op: MCOperand::createImm(Val: mode)); |
| 1509 | } else if (imod && !M) { |
| 1510 | Inst.setOpcode(ARM::CPS2p); |
| 1511 | Inst.addOperand(Op: MCOperand::createImm(Val: imod)); |
| 1512 | Inst.addOperand(Op: MCOperand::createImm(Val: iflags)); |
| 1513 | if (mode) S = MCDisassembler::SoftFail; |
| 1514 | } else if (!imod && M) { |
| 1515 | Inst.setOpcode(ARM::CPS1p); |
| 1516 | Inst.addOperand(Op: MCOperand::createImm(Val: mode)); |
| 1517 | if (iflags) S = MCDisassembler::SoftFail; |
| 1518 | } else { |
| 1519 | // imod == '00' && M == '0' --> UNPREDICTABLE |
| 1520 | Inst.setOpcode(ARM::CPS1p); |
| 1521 | Inst.addOperand(Op: MCOperand::createImm(Val: mode)); |
| 1522 | S = MCDisassembler::SoftFail; |
| 1523 | } |
| 1524 | |
| 1525 | return S; |
| 1526 | } |
| 1527 | |
| 1528 | static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn, |
| 1529 | uint64_t Address, |
| 1530 | const MCDisassembler *Decoder) { |
| 1531 | DecodeStatus S = MCDisassembler::Success; |
| 1532 | |
| 1533 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 1534 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 1535 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 1536 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 1537 | |
| 1538 | if (pred == 0xF) |
| 1539 | return DecodeCPSInstruction(Inst, Insn, Address, Decoder); |
| 1540 | |
| 1541 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 1542 | return MCDisassembler::Fail; |
| 1543 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 1544 | return MCDisassembler::Fail; |
| 1545 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1546 | return MCDisassembler::Fail; |
| 1547 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 1548 | return MCDisassembler::Fail; |
| 1549 | return S; |
| 1550 | } |
| 1551 | |
| 1552 | static DecodeStatus |
| 1553 | DecodeMemMultipleWritebackInstruction(MCInst &Inst, unsigned Insn, |
| 1554 | uint64_t Address, |
| 1555 | const MCDisassembler *Decoder) { |
| 1556 | DecodeStatus S = MCDisassembler::Success; |
| 1557 | |
| 1558 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 1559 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 1560 | unsigned reglist = fieldFromInstruction(Insn, StartBit: 0, NumBits: 16); |
| 1561 | |
| 1562 | if (pred == 0xF) { |
| 1563 | // Ambiguous with RFE and SRS |
| 1564 | switch (Inst.getOpcode()) { |
| 1565 | case ARM::LDMDA: |
| 1566 | Inst.setOpcode(ARM::RFEDA); |
| 1567 | break; |
| 1568 | case ARM::LDMDA_UPD: |
| 1569 | Inst.setOpcode(ARM::RFEDA_UPD); |
| 1570 | break; |
| 1571 | case ARM::LDMDB: |
| 1572 | Inst.setOpcode(ARM::RFEDB); |
| 1573 | break; |
| 1574 | case ARM::LDMDB_UPD: |
| 1575 | Inst.setOpcode(ARM::RFEDB_UPD); |
| 1576 | break; |
| 1577 | case ARM::LDMIA: |
| 1578 | Inst.setOpcode(ARM::RFEIA); |
| 1579 | break; |
| 1580 | case ARM::LDMIA_UPD: |
| 1581 | Inst.setOpcode(ARM::RFEIA_UPD); |
| 1582 | break; |
| 1583 | case ARM::LDMIB: |
| 1584 | Inst.setOpcode(ARM::RFEIB); |
| 1585 | break; |
| 1586 | case ARM::LDMIB_UPD: |
| 1587 | Inst.setOpcode(ARM::RFEIB_UPD); |
| 1588 | break; |
| 1589 | case ARM::STMDA: |
| 1590 | Inst.setOpcode(ARM::SRSDA); |
| 1591 | break; |
| 1592 | case ARM::STMDA_UPD: |
| 1593 | Inst.setOpcode(ARM::SRSDA_UPD); |
| 1594 | break; |
| 1595 | case ARM::STMDB: |
| 1596 | Inst.setOpcode(ARM::SRSDB); |
| 1597 | break; |
| 1598 | case ARM::STMDB_UPD: |
| 1599 | Inst.setOpcode(ARM::SRSDB_UPD); |
| 1600 | break; |
| 1601 | case ARM::STMIA: |
| 1602 | Inst.setOpcode(ARM::SRSIA); |
| 1603 | break; |
| 1604 | case ARM::STMIA_UPD: |
| 1605 | Inst.setOpcode(ARM::SRSIA_UPD); |
| 1606 | break; |
| 1607 | case ARM::STMIB: |
| 1608 | Inst.setOpcode(ARM::SRSIB); |
| 1609 | break; |
| 1610 | case ARM::STMIB_UPD: |
| 1611 | Inst.setOpcode(ARM::SRSIB_UPD); |
| 1612 | break; |
| 1613 | default: |
| 1614 | return MCDisassembler::Fail; |
| 1615 | } |
| 1616 | |
| 1617 | // For stores (which become SRS's, the only operand is the mode. |
| 1618 | if (fieldFromInstruction(Insn, StartBit: 20, NumBits: 1) == 0) { |
| 1619 | // Check SRS encoding constraints |
| 1620 | if (!(fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) == 1 && |
| 1621 | fieldFromInstruction(Insn, StartBit: 20, NumBits: 1) == 0)) |
| 1622 | return MCDisassembler::Fail; |
| 1623 | |
| 1624 | Inst.addOperand( |
| 1625 | Op: MCOperand::createImm(Val: fieldFromInstruction(Insn, StartBit: 0, NumBits: 4))); |
| 1626 | return S; |
| 1627 | } |
| 1628 | |
| 1629 | return DecodeRFEInstruction(Inst, Insn, Address, Decoder); |
| 1630 | } |
| 1631 | |
| 1632 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1633 | return MCDisassembler::Fail; |
| 1634 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1635 | return MCDisassembler::Fail; // Tied |
| 1636 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 1637 | return MCDisassembler::Fail; |
| 1638 | if (!Check(Out&: S, In: DecodeRegListOperand(Inst, Val: reglist, Address, Decoder))) |
| 1639 | return MCDisassembler::Fail; |
| 1640 | |
| 1641 | return S; |
| 1642 | } |
| 1643 | |
| 1644 | // Check for UNPREDICTABLE predicated ESB instruction |
| 1645 | static DecodeStatus DecodeHINTInstruction(MCInst &Inst, unsigned Insn, |
| 1646 | uint64_t Address, |
| 1647 | const MCDisassembler *Decoder) { |
| 1648 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 1649 | unsigned imm8 = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 1650 | const FeatureBitset &FeatureBits = |
| 1651 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 1652 | |
| 1653 | DecodeStatus S = MCDisassembler::Success; |
| 1654 | |
| 1655 | Inst.addOperand(Op: MCOperand::createImm(Val: imm8)); |
| 1656 | |
| 1657 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 1658 | return MCDisassembler::Fail; |
| 1659 | |
| 1660 | // ESB is unpredictable if pred != AL. Without the RAS extension, it is a NOP, |
| 1661 | // so all predicates should be allowed. |
| 1662 | if (imm8 == 0x10 && pred != 0xe && ((FeatureBits[ARM::FeatureRAS]) != 0)) |
| 1663 | S = MCDisassembler::SoftFail; |
| 1664 | |
| 1665 | return S; |
| 1666 | } |
| 1667 | |
| 1668 | static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn, |
| 1669 | uint64_t Address, |
| 1670 | const MCDisassembler *Decoder) { |
| 1671 | unsigned imod = fieldFromInstruction(Insn, StartBit: 9, NumBits: 2); |
| 1672 | unsigned M = fieldFromInstruction(Insn, StartBit: 8, NumBits: 1); |
| 1673 | unsigned iflags = fieldFromInstruction(Insn, StartBit: 5, NumBits: 3); |
| 1674 | unsigned mode = fieldFromInstruction(Insn, StartBit: 0, NumBits: 5); |
| 1675 | |
| 1676 | DecodeStatus S = MCDisassembler::Success; |
| 1677 | |
| 1678 | // imod == '01' --> UNPREDICTABLE |
| 1679 | // NOTE: Even though this is technically UNPREDICTABLE, we choose to |
| 1680 | // return failure here. The '01' imod value is unprintable, so there's |
| 1681 | // nothing useful we could do even if we returned UNPREDICTABLE. |
| 1682 | |
| 1683 | if (imod == 1) return MCDisassembler::Fail; |
| 1684 | |
| 1685 | if (imod && M) { |
| 1686 | Inst.setOpcode(ARM::t2CPS3p); |
| 1687 | Inst.addOperand(Op: MCOperand::createImm(Val: imod)); |
| 1688 | Inst.addOperand(Op: MCOperand::createImm(Val: iflags)); |
| 1689 | Inst.addOperand(Op: MCOperand::createImm(Val: mode)); |
| 1690 | } else if (imod && !M) { |
| 1691 | Inst.setOpcode(ARM::t2CPS2p); |
| 1692 | Inst.addOperand(Op: MCOperand::createImm(Val: imod)); |
| 1693 | Inst.addOperand(Op: MCOperand::createImm(Val: iflags)); |
| 1694 | if (mode) S = MCDisassembler::SoftFail; |
| 1695 | } else if (!imod && M) { |
| 1696 | Inst.setOpcode(ARM::t2CPS1p); |
| 1697 | Inst.addOperand(Op: MCOperand::createImm(Val: mode)); |
| 1698 | if (iflags) S = MCDisassembler::SoftFail; |
| 1699 | } else { |
| 1700 | // imod == '00' && M == '0' --> this is a HINT instruction |
| 1701 | int imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 1702 | // HINT are defined only for immediate in [0..4] |
| 1703 | if(imm > 4) return MCDisassembler::Fail; |
| 1704 | Inst.setOpcode(ARM::t2HINT); |
| 1705 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 1706 | DecodePredicateOperand(Inst, Decoder); |
| 1707 | } |
| 1708 | |
| 1709 | return S; |
| 1710 | } |
| 1711 | |
| 1712 | static DecodeStatus |
| 1713 | DecodeT2HintSpaceInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 1714 | const MCDisassembler *Decoder) { |
| 1715 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 1716 | |
| 1717 | unsigned Opcode = ARM::t2HINT; |
| 1718 | |
| 1719 | if (imm == 0x0D) { |
| 1720 | Opcode = ARM::t2PACBTI; |
| 1721 | } else if (imm == 0x1D) { |
| 1722 | Opcode = ARM::t2PAC; |
| 1723 | } else if (imm == 0x2D) { |
| 1724 | Opcode = ARM::t2AUT; |
| 1725 | } else if (imm == 0x0F) { |
| 1726 | Opcode = ARM::t2BTI; |
| 1727 | } |
| 1728 | |
| 1729 | Inst.setOpcode(Opcode); |
| 1730 | if (Opcode == ARM::t2HINT) { |
| 1731 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 1732 | DecodePredicateOperand(Inst, Decoder); |
| 1733 | } |
| 1734 | |
| 1735 | return MCDisassembler::Success; |
| 1736 | } |
| 1737 | |
| 1738 | static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn, |
| 1739 | uint64_t Address, |
| 1740 | const MCDisassembler *Decoder) { |
| 1741 | DecodeStatus S = MCDisassembler::Success; |
| 1742 | |
| 1743 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 1744 | unsigned imm = 0; |
| 1745 | |
| 1746 | imm |= (fieldFromInstruction(Insn, StartBit: 0, NumBits: 8) << 0); |
| 1747 | imm |= (fieldFromInstruction(Insn, StartBit: 12, NumBits: 3) << 8); |
| 1748 | imm |= (fieldFromInstruction(Insn, StartBit: 16, NumBits: 4) << 12); |
| 1749 | imm |= (fieldFromInstruction(Insn, StartBit: 26, NumBits: 1) << 11); |
| 1750 | |
| 1751 | if (Inst.getOpcode() == ARM::t2MOVTi16) |
| 1752 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 1753 | return MCDisassembler::Fail; |
| 1754 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 1755 | return MCDisassembler::Fail; |
| 1756 | |
| 1757 | if (!tryAddingSymbolicOperand(Address, Value: imm, isBranch: false, InstSize: 4, MI&: Inst, Decoder)) |
| 1758 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 1759 | |
| 1760 | DecodePredicateOperand(Inst, Decoder); |
| 1761 | return S; |
| 1762 | } |
| 1763 | |
| 1764 | static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn, |
| 1765 | uint64_t Address, |
| 1766 | const MCDisassembler *Decoder) { |
| 1767 | DecodeStatus S = MCDisassembler::Success; |
| 1768 | |
| 1769 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 1770 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 1771 | unsigned imm = 0; |
| 1772 | |
| 1773 | imm |= (fieldFromInstruction(Insn, StartBit: 0, NumBits: 12) << 0); |
| 1774 | imm |= (fieldFromInstruction(Insn, StartBit: 16, NumBits: 4) << 12); |
| 1775 | |
| 1776 | if (Inst.getOpcode() == ARM::MOVTi16) |
| 1777 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 1778 | return MCDisassembler::Fail; |
| 1779 | |
| 1780 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 1781 | return MCDisassembler::Fail; |
| 1782 | |
| 1783 | if (!tryAddingSymbolicOperand(Address, Value: imm, isBranch: false, InstSize: 4, MI&: Inst, Decoder)) |
| 1784 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 1785 | |
| 1786 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 1787 | return MCDisassembler::Fail; |
| 1788 | |
| 1789 | return S; |
| 1790 | } |
| 1791 | |
| 1792 | static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn, |
| 1793 | uint64_t Address, |
| 1794 | const MCDisassembler *Decoder) { |
| 1795 | DecodeStatus S = MCDisassembler::Success; |
| 1796 | |
| 1797 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 1798 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 1799 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 1800 | unsigned Ra = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 1801 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 1802 | |
| 1803 | if (pred == 0xF) |
| 1804 | return DecodeCPSInstruction(Inst, Insn, Address, Decoder); |
| 1805 | |
| 1806 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 1807 | return MCDisassembler::Fail; |
| 1808 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1809 | return MCDisassembler::Fail; |
| 1810 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 1811 | return MCDisassembler::Fail; |
| 1812 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Ra, Address, Decoder))) |
| 1813 | return MCDisassembler::Fail; |
| 1814 | |
| 1815 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 1816 | return MCDisassembler::Fail; |
| 1817 | |
| 1818 | return S; |
| 1819 | } |
| 1820 | |
| 1821 | static DecodeStatus DecodeSETPANInstruction(MCInst &Inst, unsigned Insn, |
| 1822 | uint64_t Address, |
| 1823 | const MCDisassembler *Decoder) { |
| 1824 | DecodeStatus S = MCDisassembler::Success; |
| 1825 | |
| 1826 | unsigned Imm = fieldFromInstruction(Insn, StartBit: 9, NumBits: 1); |
| 1827 | |
| 1828 | const FeatureBitset &FeatureBits = |
| 1829 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 1830 | |
| 1831 | if (!FeatureBits[ARM::HasV8_1aOps] || |
| 1832 | !FeatureBits[ARM::HasV8Ops]) |
| 1833 | return MCDisassembler::Fail; |
| 1834 | |
| 1835 | // Decoder can be called from DecodeTST, which does not check the full |
| 1836 | // encoding is valid. |
| 1837 | if (fieldFromInstruction(Insn, StartBit: 20,NumBits: 12) != 0xf11 || |
| 1838 | fieldFromInstruction(Insn, StartBit: 4,NumBits: 4) != 0) |
| 1839 | return MCDisassembler::Fail; |
| 1840 | if (fieldFromInstruction(Insn, StartBit: 10,NumBits: 10) != 0 || |
| 1841 | fieldFromInstruction(Insn, StartBit: 0,NumBits: 4) != 0) |
| 1842 | S = MCDisassembler::SoftFail; |
| 1843 | |
| 1844 | Inst.setOpcode(ARM::SETPAN); |
| 1845 | Inst.addOperand(Op: MCOperand::createImm(Val: Imm)); |
| 1846 | |
| 1847 | return S; |
| 1848 | } |
| 1849 | |
| 1850 | static DecodeStatus DecodeTSTInstruction(MCInst &Inst, unsigned Insn, |
| 1851 | uint64_t Address, |
| 1852 | const MCDisassembler *Decoder) { |
| 1853 | DecodeStatus S = MCDisassembler::Success; |
| 1854 | |
| 1855 | unsigned Pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 1856 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 1857 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 1858 | |
| 1859 | if (Pred == 0xF) |
| 1860 | return DecodeSETPANInstruction(Inst, Insn, Address, Decoder); |
| 1861 | |
| 1862 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1863 | return MCDisassembler::Fail; |
| 1864 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 1865 | return MCDisassembler::Fail; |
| 1866 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: Pred, Address, Decoder))) |
| 1867 | return MCDisassembler::Fail; |
| 1868 | |
| 1869 | return S; |
| 1870 | } |
| 1871 | |
| 1872 | static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val, |
| 1873 | uint64_t Address, |
| 1874 | const MCDisassembler *Decoder) { |
| 1875 | DecodeStatus S = MCDisassembler::Success; |
| 1876 | |
| 1877 | unsigned add = fieldFromInstruction(Insn: Val, StartBit: 12, NumBits: 1); |
| 1878 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 12); |
| 1879 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 13, NumBits: 4); |
| 1880 | |
| 1881 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1882 | return MCDisassembler::Fail; |
| 1883 | |
| 1884 | if (!add) imm *= -1; |
| 1885 | if (imm == 0 && !add) imm = INT32_MIN; |
| 1886 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 1887 | if (Rn == 15) |
| 1888 | tryAddingPcLoadReferenceComment(Address, Value: Address + imm + 8, Decoder); |
| 1889 | |
| 1890 | return S; |
| 1891 | } |
| 1892 | |
| 1893 | static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val, |
| 1894 | uint64_t Address, |
| 1895 | const MCDisassembler *Decoder) { |
| 1896 | DecodeStatus S = MCDisassembler::Success; |
| 1897 | |
| 1898 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 9, NumBits: 4); |
| 1899 | // U == 1 to add imm, 0 to subtract it. |
| 1900 | unsigned U = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 1); |
| 1901 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 8); |
| 1902 | |
| 1903 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1904 | return MCDisassembler::Fail; |
| 1905 | |
| 1906 | if (U) |
| 1907 | Inst.addOperand(Op: MCOperand::createImm(Val: ARM_AM::getAM5Opc(Opc: ARM_AM::add, Offset: imm))); |
| 1908 | else |
| 1909 | Inst.addOperand(Op: MCOperand::createImm(Val: ARM_AM::getAM5Opc(Opc: ARM_AM::sub, Offset: imm))); |
| 1910 | |
| 1911 | return S; |
| 1912 | } |
| 1913 | |
| 1914 | static DecodeStatus DecodeAddrMode5FP16Operand(MCInst &Inst, unsigned Val, |
| 1915 | uint64_t Address, |
| 1916 | const MCDisassembler *Decoder) { |
| 1917 | DecodeStatus S = MCDisassembler::Success; |
| 1918 | |
| 1919 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 9, NumBits: 4); |
| 1920 | // U == 1 to add imm, 0 to subtract it. |
| 1921 | unsigned U = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 1); |
| 1922 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 8); |
| 1923 | |
| 1924 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 1925 | return MCDisassembler::Fail; |
| 1926 | |
| 1927 | if (U) |
| 1928 | Inst.addOperand(Op: MCOperand::createImm(Val: ARM_AM::getAM5FP16Opc(Opc: ARM_AM::add, Offset: imm))); |
| 1929 | else |
| 1930 | Inst.addOperand(Op: MCOperand::createImm(Val: ARM_AM::getAM5FP16Opc(Opc: ARM_AM::sub, Offset: imm))); |
| 1931 | |
| 1932 | return S; |
| 1933 | } |
| 1934 | |
| 1935 | static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val, |
| 1936 | uint64_t Address, |
| 1937 | const MCDisassembler *Decoder) { |
| 1938 | return DecodeGPRRegisterClass(Inst, RegNo: Val, Address, Decoder); |
| 1939 | } |
| 1940 | |
| 1941 | static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn, |
| 1942 | uint64_t Address, |
| 1943 | const MCDisassembler *Decoder) { |
| 1944 | DecodeStatus Status = MCDisassembler::Success; |
| 1945 | |
| 1946 | // Note the J1 and J2 values are from the encoded instruction. So here |
| 1947 | // change them to I1 and I2 values via as documented: |
| 1948 | // I1 = NOT(J1 EOR S); |
| 1949 | // I2 = NOT(J2 EOR S); |
| 1950 | // and build the imm32 with one trailing zero as documented: |
| 1951 | // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32); |
| 1952 | unsigned S = fieldFromInstruction(Insn, StartBit: 26, NumBits: 1); |
| 1953 | unsigned J1 = fieldFromInstruction(Insn, StartBit: 13, NumBits: 1); |
| 1954 | unsigned J2 = fieldFromInstruction(Insn, StartBit: 11, NumBits: 1); |
| 1955 | unsigned I1 = !(J1 ^ S); |
| 1956 | unsigned I2 = !(J2 ^ S); |
| 1957 | unsigned imm10 = fieldFromInstruction(Insn, StartBit: 16, NumBits: 10); |
| 1958 | unsigned imm11 = fieldFromInstruction(Insn, StartBit: 0, NumBits: 11); |
| 1959 | unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11; |
| 1960 | int imm32 = SignExtend32<25>(X: tmp << 1); |
| 1961 | if (!tryAddingSymbolicOperand(Address, Value: Address + imm32 + 4, |
| 1962 | isBranch: true, InstSize: 4, MI&: Inst, Decoder)) |
| 1963 | Inst.addOperand(Op: MCOperand::createImm(Val: imm32)); |
| 1964 | |
| 1965 | DecodePredicateOperand(Inst, Decoder); |
| 1966 | return Status; |
| 1967 | } |
| 1968 | |
| 1969 | static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn, |
| 1970 | uint64_t Address, |
| 1971 | const MCDisassembler *Decoder) { |
| 1972 | DecodeStatus S = MCDisassembler::Success; |
| 1973 | |
| 1974 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 1975 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 24) << 2; |
| 1976 | |
| 1977 | if (pred == 0xF) { |
| 1978 | Inst.setOpcode(ARM::BLXi); |
| 1979 | imm |= fieldFromInstruction(Insn, StartBit: 24, NumBits: 1) << 1; |
| 1980 | if (!tryAddingSymbolicOperand(Address, Value: Address + SignExtend32<26>(X: imm) + 8, |
| 1981 | isBranch: true, InstSize: 4, MI&: Inst, Decoder)) |
| 1982 | Inst.addOperand(Op: MCOperand::createImm(Val: SignExtend32<26>(X: imm))); |
| 1983 | return S; |
| 1984 | } |
| 1985 | |
| 1986 | if (!tryAddingSymbolicOperand(Address, Value: Address + SignExtend32<26>(X: imm) + 8, |
| 1987 | isBranch: true, InstSize: 4, MI&: Inst, Decoder)) |
| 1988 | Inst.addOperand(Op: MCOperand::createImm(Val: SignExtend32<26>(X: imm))); |
| 1989 | |
| 1990 | // We already have BL_pred for BL w/ predicate, no need to add addition |
| 1991 | // predicate opreands for BL |
| 1992 | if (Inst.getOpcode() != ARM::BL) |
| 1993 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 1994 | return MCDisassembler::Fail; |
| 1995 | |
| 1996 | return S; |
| 1997 | } |
| 1998 | |
| 1999 | static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val, |
| 2000 | uint64_t Address, |
| 2001 | const MCDisassembler *Decoder) { |
| 2002 | DecodeStatus S = MCDisassembler::Success; |
| 2003 | |
| 2004 | unsigned Rm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 4); |
| 2005 | unsigned align = fieldFromInstruction(Insn: Val, StartBit: 4, NumBits: 2); |
| 2006 | |
| 2007 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 2008 | return MCDisassembler::Fail; |
| 2009 | if (!align) |
| 2010 | Inst.addOperand(Op: MCOperand::createImm(Val: 0)); |
| 2011 | else |
| 2012 | Inst.addOperand(Op: MCOperand::createImm(Val: 4 << align)); |
| 2013 | |
| 2014 | return S; |
| 2015 | } |
| 2016 | |
| 2017 | static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn, |
| 2018 | uint64_t Address, |
| 2019 | const MCDisassembler *Decoder) { |
| 2020 | DecodeStatus S = MCDisassembler::Success; |
| 2021 | |
| 2022 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 2023 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 2024 | unsigned wb = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 2025 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 2026 | Rn |= fieldFromInstruction(Insn, StartBit: 4, NumBits: 2) << 4; |
| 2027 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2028 | |
| 2029 | // First output register |
| 2030 | switch (Inst.getOpcode()) { |
| 2031 | case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8: |
| 2032 | case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register: |
| 2033 | case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register: |
| 2034 | case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register: |
| 2035 | case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register: |
| 2036 | case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8: |
| 2037 | case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register: |
| 2038 | case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register: |
| 2039 | case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register: |
| 2040 | if (!Check(Out&: S, In: DecodeDPairRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2041 | return MCDisassembler::Fail; |
| 2042 | break; |
| 2043 | case ARM::VLD2b16: |
| 2044 | case ARM::VLD2b32: |
| 2045 | case ARM::VLD2b8: |
| 2046 | case ARM::VLD2b16wb_fixed: |
| 2047 | case ARM::VLD2b16wb_register: |
| 2048 | case ARM::VLD2b32wb_fixed: |
| 2049 | case ARM::VLD2b32wb_register: |
| 2050 | case ARM::VLD2b8wb_fixed: |
| 2051 | case ARM::VLD2b8wb_register: |
| 2052 | if (!Check(Out&: S, In: DecodeDPairSpacedRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2053 | return MCDisassembler::Fail; |
| 2054 | break; |
| 2055 | default: |
| 2056 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2057 | return MCDisassembler::Fail; |
| 2058 | } |
| 2059 | |
| 2060 | // Second output register |
| 2061 | switch (Inst.getOpcode()) { |
| 2062 | case ARM::VLD3d8: |
| 2063 | case ARM::VLD3d16: |
| 2064 | case ARM::VLD3d32: |
| 2065 | case ARM::VLD3d8_UPD: |
| 2066 | case ARM::VLD3d16_UPD: |
| 2067 | case ARM::VLD3d32_UPD: |
| 2068 | case ARM::VLD4d8: |
| 2069 | case ARM::VLD4d16: |
| 2070 | case ARM::VLD4d32: |
| 2071 | case ARM::VLD4d8_UPD: |
| 2072 | case ARM::VLD4d16_UPD: |
| 2073 | case ARM::VLD4d32_UPD: |
| 2074 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+1)%32, Address, Decoder))) |
| 2075 | return MCDisassembler::Fail; |
| 2076 | break; |
| 2077 | case ARM::VLD3q8: |
| 2078 | case ARM::VLD3q16: |
| 2079 | case ARM::VLD3q32: |
| 2080 | case ARM::VLD3q8_UPD: |
| 2081 | case ARM::VLD3q16_UPD: |
| 2082 | case ARM::VLD3q32_UPD: |
| 2083 | case ARM::VLD4q8: |
| 2084 | case ARM::VLD4q16: |
| 2085 | case ARM::VLD4q32: |
| 2086 | case ARM::VLD4q8_UPD: |
| 2087 | case ARM::VLD4q16_UPD: |
| 2088 | case ARM::VLD4q32_UPD: |
| 2089 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+2)%32, Address, Decoder))) |
| 2090 | return MCDisassembler::Fail; |
| 2091 | break; |
| 2092 | default: |
| 2093 | break; |
| 2094 | } |
| 2095 | |
| 2096 | // Third output register |
| 2097 | switch(Inst.getOpcode()) { |
| 2098 | case ARM::VLD3d8: |
| 2099 | case ARM::VLD3d16: |
| 2100 | case ARM::VLD3d32: |
| 2101 | case ARM::VLD3d8_UPD: |
| 2102 | case ARM::VLD3d16_UPD: |
| 2103 | case ARM::VLD3d32_UPD: |
| 2104 | case ARM::VLD4d8: |
| 2105 | case ARM::VLD4d16: |
| 2106 | case ARM::VLD4d32: |
| 2107 | case ARM::VLD4d8_UPD: |
| 2108 | case ARM::VLD4d16_UPD: |
| 2109 | case ARM::VLD4d32_UPD: |
| 2110 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+2)%32, Address, Decoder))) |
| 2111 | return MCDisassembler::Fail; |
| 2112 | break; |
| 2113 | case ARM::VLD3q8: |
| 2114 | case ARM::VLD3q16: |
| 2115 | case ARM::VLD3q32: |
| 2116 | case ARM::VLD3q8_UPD: |
| 2117 | case ARM::VLD3q16_UPD: |
| 2118 | case ARM::VLD3q32_UPD: |
| 2119 | case ARM::VLD4q8: |
| 2120 | case ARM::VLD4q16: |
| 2121 | case ARM::VLD4q32: |
| 2122 | case ARM::VLD4q8_UPD: |
| 2123 | case ARM::VLD4q16_UPD: |
| 2124 | case ARM::VLD4q32_UPD: |
| 2125 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+4)%32, Address, Decoder))) |
| 2126 | return MCDisassembler::Fail; |
| 2127 | break; |
| 2128 | default: |
| 2129 | break; |
| 2130 | } |
| 2131 | |
| 2132 | // Fourth output register |
| 2133 | switch (Inst.getOpcode()) { |
| 2134 | case ARM::VLD4d8: |
| 2135 | case ARM::VLD4d16: |
| 2136 | case ARM::VLD4d32: |
| 2137 | case ARM::VLD4d8_UPD: |
| 2138 | case ARM::VLD4d16_UPD: |
| 2139 | case ARM::VLD4d32_UPD: |
| 2140 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+3)%32, Address, Decoder))) |
| 2141 | return MCDisassembler::Fail; |
| 2142 | break; |
| 2143 | case ARM::VLD4q8: |
| 2144 | case ARM::VLD4q16: |
| 2145 | case ARM::VLD4q32: |
| 2146 | case ARM::VLD4q8_UPD: |
| 2147 | case ARM::VLD4q16_UPD: |
| 2148 | case ARM::VLD4q32_UPD: |
| 2149 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+6)%32, Address, Decoder))) |
| 2150 | return MCDisassembler::Fail; |
| 2151 | break; |
| 2152 | default: |
| 2153 | break; |
| 2154 | } |
| 2155 | |
| 2156 | // Writeback operand |
| 2157 | switch (Inst.getOpcode()) { |
| 2158 | case ARM::VLD1d8wb_fixed: |
| 2159 | case ARM::VLD1d16wb_fixed: |
| 2160 | case ARM::VLD1d32wb_fixed: |
| 2161 | case ARM::VLD1d64wb_fixed: |
| 2162 | case ARM::VLD1d8wb_register: |
| 2163 | case ARM::VLD1d16wb_register: |
| 2164 | case ARM::VLD1d32wb_register: |
| 2165 | case ARM::VLD1d64wb_register: |
| 2166 | case ARM::VLD1q8wb_fixed: |
| 2167 | case ARM::VLD1q16wb_fixed: |
| 2168 | case ARM::VLD1q32wb_fixed: |
| 2169 | case ARM::VLD1q64wb_fixed: |
| 2170 | case ARM::VLD1q8wb_register: |
| 2171 | case ARM::VLD1q16wb_register: |
| 2172 | case ARM::VLD1q32wb_register: |
| 2173 | case ARM::VLD1q64wb_register: |
| 2174 | case ARM::VLD1d8Twb_fixed: |
| 2175 | case ARM::VLD1d8Twb_register: |
| 2176 | case ARM::VLD1d16Twb_fixed: |
| 2177 | case ARM::VLD1d16Twb_register: |
| 2178 | case ARM::VLD1d32Twb_fixed: |
| 2179 | case ARM::VLD1d32Twb_register: |
| 2180 | case ARM::VLD1d64Twb_fixed: |
| 2181 | case ARM::VLD1d64Twb_register: |
| 2182 | case ARM::VLD1d8Qwb_fixed: |
| 2183 | case ARM::VLD1d8Qwb_register: |
| 2184 | case ARM::VLD1d16Qwb_fixed: |
| 2185 | case ARM::VLD1d16Qwb_register: |
| 2186 | case ARM::VLD1d32Qwb_fixed: |
| 2187 | case ARM::VLD1d32Qwb_register: |
| 2188 | case ARM::VLD1d64Qwb_fixed: |
| 2189 | case ARM::VLD1d64Qwb_register: |
| 2190 | case ARM::VLD2d8wb_fixed: |
| 2191 | case ARM::VLD2d16wb_fixed: |
| 2192 | case ARM::VLD2d32wb_fixed: |
| 2193 | case ARM::VLD2q8wb_fixed: |
| 2194 | case ARM::VLD2q16wb_fixed: |
| 2195 | case ARM::VLD2q32wb_fixed: |
| 2196 | case ARM::VLD2d8wb_register: |
| 2197 | case ARM::VLD2d16wb_register: |
| 2198 | case ARM::VLD2d32wb_register: |
| 2199 | case ARM::VLD2q8wb_register: |
| 2200 | case ARM::VLD2q16wb_register: |
| 2201 | case ARM::VLD2q32wb_register: |
| 2202 | case ARM::VLD2b8wb_fixed: |
| 2203 | case ARM::VLD2b16wb_fixed: |
| 2204 | case ARM::VLD2b32wb_fixed: |
| 2205 | case ARM::VLD2b8wb_register: |
| 2206 | case ARM::VLD2b16wb_register: |
| 2207 | case ARM::VLD2b32wb_register: |
| 2208 | Inst.addOperand(Op: MCOperand::createImm(Val: 0)); |
| 2209 | break; |
| 2210 | case ARM::VLD3d8_UPD: |
| 2211 | case ARM::VLD3d16_UPD: |
| 2212 | case ARM::VLD3d32_UPD: |
| 2213 | case ARM::VLD3q8_UPD: |
| 2214 | case ARM::VLD3q16_UPD: |
| 2215 | case ARM::VLD3q32_UPD: |
| 2216 | case ARM::VLD4d8_UPD: |
| 2217 | case ARM::VLD4d16_UPD: |
| 2218 | case ARM::VLD4d32_UPD: |
| 2219 | case ARM::VLD4q8_UPD: |
| 2220 | case ARM::VLD4q16_UPD: |
| 2221 | case ARM::VLD4q32_UPD: |
| 2222 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: wb, Address, Decoder))) |
| 2223 | return MCDisassembler::Fail; |
| 2224 | break; |
| 2225 | default: |
| 2226 | break; |
| 2227 | } |
| 2228 | |
| 2229 | // AddrMode6 Base (register+alignment) |
| 2230 | if (!Check(Out&: S, In: DecodeAddrMode6Operand(Inst, Val: Rn, Address, Decoder))) |
| 2231 | return MCDisassembler::Fail; |
| 2232 | |
| 2233 | // AddrMode6 Offset (register) |
| 2234 | switch (Inst.getOpcode()) { |
| 2235 | default: |
| 2236 | // The below have been updated to have explicit am6offset split |
| 2237 | // between fixed and register offset. For those instructions not |
| 2238 | // yet updated, we need to add an additional reg0 operand for the |
| 2239 | // fixed variant. |
| 2240 | // |
| 2241 | // The fixed offset encodes as Rm == 0xd, so we check for that. |
| 2242 | if (Rm == 0xd) { |
| 2243 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 2244 | break; |
| 2245 | } |
| 2246 | // Fall through to handle the register offset variant. |
| 2247 | [[fallthrough]]; |
| 2248 | case ARM::VLD1d8wb_fixed: |
| 2249 | case ARM::VLD1d16wb_fixed: |
| 2250 | case ARM::VLD1d32wb_fixed: |
| 2251 | case ARM::VLD1d64wb_fixed: |
| 2252 | case ARM::VLD1d8Twb_fixed: |
| 2253 | case ARM::VLD1d16Twb_fixed: |
| 2254 | case ARM::VLD1d32Twb_fixed: |
| 2255 | case ARM::VLD1d64Twb_fixed: |
| 2256 | case ARM::VLD1d8Qwb_fixed: |
| 2257 | case ARM::VLD1d16Qwb_fixed: |
| 2258 | case ARM::VLD1d32Qwb_fixed: |
| 2259 | case ARM::VLD1d64Qwb_fixed: |
| 2260 | case ARM::VLD1d8wb_register: |
| 2261 | case ARM::VLD1d16wb_register: |
| 2262 | case ARM::VLD1d32wb_register: |
| 2263 | case ARM::VLD1d64wb_register: |
| 2264 | case ARM::VLD1q8wb_fixed: |
| 2265 | case ARM::VLD1q16wb_fixed: |
| 2266 | case ARM::VLD1q32wb_fixed: |
| 2267 | case ARM::VLD1q64wb_fixed: |
| 2268 | case ARM::VLD1q8wb_register: |
| 2269 | case ARM::VLD1q16wb_register: |
| 2270 | case ARM::VLD1q32wb_register: |
| 2271 | case ARM::VLD1q64wb_register: |
| 2272 | // The fixed offset post-increment encodes Rm == 0xd. The no-writeback |
| 2273 | // variant encodes Rm == 0xf. Anything else is a register offset post- |
| 2274 | // increment and we need to add the register operand to the instruction. |
| 2275 | if (Rm != 0xD && Rm != 0xF && |
| 2276 | !Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 2277 | return MCDisassembler::Fail; |
| 2278 | break; |
| 2279 | case ARM::VLD2d8wb_fixed: |
| 2280 | case ARM::VLD2d16wb_fixed: |
| 2281 | case ARM::VLD2d32wb_fixed: |
| 2282 | case ARM::VLD2b8wb_fixed: |
| 2283 | case ARM::VLD2b16wb_fixed: |
| 2284 | case ARM::VLD2b32wb_fixed: |
| 2285 | case ARM::VLD2q8wb_fixed: |
| 2286 | case ARM::VLD2q16wb_fixed: |
| 2287 | case ARM::VLD2q32wb_fixed: |
| 2288 | break; |
| 2289 | } |
| 2290 | |
| 2291 | DecodePredicateOperand(Inst, Decoder); |
| 2292 | return S; |
| 2293 | } |
| 2294 | |
| 2295 | static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn, |
| 2296 | uint64_t Address, |
| 2297 | const MCDisassembler *Decoder) { |
| 2298 | DecodeStatus S = MCDisassembler::Success; |
| 2299 | |
| 2300 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 2301 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 2302 | unsigned wb = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 2303 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 2304 | Rn |= fieldFromInstruction(Insn, StartBit: 4, NumBits: 2) << 4; |
| 2305 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2306 | |
| 2307 | // Writeback Operand |
| 2308 | switch (Inst.getOpcode()) { |
| 2309 | case ARM::VST1d8wb_fixed: |
| 2310 | case ARM::VST1d16wb_fixed: |
| 2311 | case ARM::VST1d32wb_fixed: |
| 2312 | case ARM::VST1d64wb_fixed: |
| 2313 | case ARM::VST1d8wb_register: |
| 2314 | case ARM::VST1d16wb_register: |
| 2315 | case ARM::VST1d32wb_register: |
| 2316 | case ARM::VST1d64wb_register: |
| 2317 | case ARM::VST1q8wb_fixed: |
| 2318 | case ARM::VST1q16wb_fixed: |
| 2319 | case ARM::VST1q32wb_fixed: |
| 2320 | case ARM::VST1q64wb_fixed: |
| 2321 | case ARM::VST1q8wb_register: |
| 2322 | case ARM::VST1q16wb_register: |
| 2323 | case ARM::VST1q32wb_register: |
| 2324 | case ARM::VST1q64wb_register: |
| 2325 | case ARM::VST1d8Twb_fixed: |
| 2326 | case ARM::VST1d16Twb_fixed: |
| 2327 | case ARM::VST1d32Twb_fixed: |
| 2328 | case ARM::VST1d64Twb_fixed: |
| 2329 | case ARM::VST1d8Twb_register: |
| 2330 | case ARM::VST1d16Twb_register: |
| 2331 | case ARM::VST1d32Twb_register: |
| 2332 | case ARM::VST1d64Twb_register: |
| 2333 | case ARM::VST1d8Qwb_fixed: |
| 2334 | case ARM::VST1d16Qwb_fixed: |
| 2335 | case ARM::VST1d32Qwb_fixed: |
| 2336 | case ARM::VST1d64Qwb_fixed: |
| 2337 | case ARM::VST1d8Qwb_register: |
| 2338 | case ARM::VST1d16Qwb_register: |
| 2339 | case ARM::VST1d32Qwb_register: |
| 2340 | case ARM::VST1d64Qwb_register: |
| 2341 | case ARM::VST2d8wb_fixed: |
| 2342 | case ARM::VST2d16wb_fixed: |
| 2343 | case ARM::VST2d32wb_fixed: |
| 2344 | case ARM::VST2d8wb_register: |
| 2345 | case ARM::VST2d16wb_register: |
| 2346 | case ARM::VST2d32wb_register: |
| 2347 | case ARM::VST2q8wb_fixed: |
| 2348 | case ARM::VST2q16wb_fixed: |
| 2349 | case ARM::VST2q32wb_fixed: |
| 2350 | case ARM::VST2q8wb_register: |
| 2351 | case ARM::VST2q16wb_register: |
| 2352 | case ARM::VST2q32wb_register: |
| 2353 | case ARM::VST2b8wb_fixed: |
| 2354 | case ARM::VST2b16wb_fixed: |
| 2355 | case ARM::VST2b32wb_fixed: |
| 2356 | case ARM::VST2b8wb_register: |
| 2357 | case ARM::VST2b16wb_register: |
| 2358 | case ARM::VST2b32wb_register: |
| 2359 | if (Rm == 0xF) |
| 2360 | return MCDisassembler::Fail; |
| 2361 | Inst.addOperand(Op: MCOperand::createImm(Val: 0)); |
| 2362 | break; |
| 2363 | case ARM::VST3d8_UPD: |
| 2364 | case ARM::VST3d16_UPD: |
| 2365 | case ARM::VST3d32_UPD: |
| 2366 | case ARM::VST3q8_UPD: |
| 2367 | case ARM::VST3q16_UPD: |
| 2368 | case ARM::VST3q32_UPD: |
| 2369 | case ARM::VST4d8_UPD: |
| 2370 | case ARM::VST4d16_UPD: |
| 2371 | case ARM::VST4d32_UPD: |
| 2372 | case ARM::VST4q8_UPD: |
| 2373 | case ARM::VST4q16_UPD: |
| 2374 | case ARM::VST4q32_UPD: |
| 2375 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: wb, Address, Decoder))) |
| 2376 | return MCDisassembler::Fail; |
| 2377 | break; |
| 2378 | default: |
| 2379 | break; |
| 2380 | } |
| 2381 | |
| 2382 | // AddrMode6 Base (register+alignment) |
| 2383 | if (!Check(Out&: S, In: DecodeAddrMode6Operand(Inst, Val: Rn, Address, Decoder))) |
| 2384 | return MCDisassembler::Fail; |
| 2385 | |
| 2386 | // AddrMode6 Offset (register) |
| 2387 | switch (Inst.getOpcode()) { |
| 2388 | default: |
| 2389 | if (Rm == 0xD) |
| 2390 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 2391 | else if (Rm != 0xF) { |
| 2392 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 2393 | return MCDisassembler::Fail; |
| 2394 | } |
| 2395 | break; |
| 2396 | case ARM::VST1d8wb_fixed: |
| 2397 | case ARM::VST1d16wb_fixed: |
| 2398 | case ARM::VST1d32wb_fixed: |
| 2399 | case ARM::VST1d64wb_fixed: |
| 2400 | case ARM::VST1q8wb_fixed: |
| 2401 | case ARM::VST1q16wb_fixed: |
| 2402 | case ARM::VST1q32wb_fixed: |
| 2403 | case ARM::VST1q64wb_fixed: |
| 2404 | case ARM::VST1d8Twb_fixed: |
| 2405 | case ARM::VST1d16Twb_fixed: |
| 2406 | case ARM::VST1d32Twb_fixed: |
| 2407 | case ARM::VST1d64Twb_fixed: |
| 2408 | case ARM::VST1d8Qwb_fixed: |
| 2409 | case ARM::VST1d16Qwb_fixed: |
| 2410 | case ARM::VST1d32Qwb_fixed: |
| 2411 | case ARM::VST1d64Qwb_fixed: |
| 2412 | case ARM::VST2d8wb_fixed: |
| 2413 | case ARM::VST2d16wb_fixed: |
| 2414 | case ARM::VST2d32wb_fixed: |
| 2415 | case ARM::VST2q8wb_fixed: |
| 2416 | case ARM::VST2q16wb_fixed: |
| 2417 | case ARM::VST2q32wb_fixed: |
| 2418 | case ARM::VST2b8wb_fixed: |
| 2419 | case ARM::VST2b16wb_fixed: |
| 2420 | case ARM::VST2b32wb_fixed: |
| 2421 | break; |
| 2422 | } |
| 2423 | |
| 2424 | // First input register |
| 2425 | switch (Inst.getOpcode()) { |
| 2426 | case ARM::VST1q16: |
| 2427 | case ARM::VST1q32: |
| 2428 | case ARM::VST1q64: |
| 2429 | case ARM::VST1q8: |
| 2430 | case ARM::VST1q16wb_fixed: |
| 2431 | case ARM::VST1q16wb_register: |
| 2432 | case ARM::VST1q32wb_fixed: |
| 2433 | case ARM::VST1q32wb_register: |
| 2434 | case ARM::VST1q64wb_fixed: |
| 2435 | case ARM::VST1q64wb_register: |
| 2436 | case ARM::VST1q8wb_fixed: |
| 2437 | case ARM::VST1q8wb_register: |
| 2438 | case ARM::VST2d16: |
| 2439 | case ARM::VST2d32: |
| 2440 | case ARM::VST2d8: |
| 2441 | case ARM::VST2d16wb_fixed: |
| 2442 | case ARM::VST2d16wb_register: |
| 2443 | case ARM::VST2d32wb_fixed: |
| 2444 | case ARM::VST2d32wb_register: |
| 2445 | case ARM::VST2d8wb_fixed: |
| 2446 | case ARM::VST2d8wb_register: |
| 2447 | if (!Check(Out&: S, In: DecodeDPairRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2448 | return MCDisassembler::Fail; |
| 2449 | break; |
| 2450 | case ARM::VST2b16: |
| 2451 | case ARM::VST2b32: |
| 2452 | case ARM::VST2b8: |
| 2453 | case ARM::VST2b16wb_fixed: |
| 2454 | case ARM::VST2b16wb_register: |
| 2455 | case ARM::VST2b32wb_fixed: |
| 2456 | case ARM::VST2b32wb_register: |
| 2457 | case ARM::VST2b8wb_fixed: |
| 2458 | case ARM::VST2b8wb_register: |
| 2459 | if (!Check(Out&: S, In: DecodeDPairSpacedRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2460 | return MCDisassembler::Fail; |
| 2461 | break; |
| 2462 | default: |
| 2463 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2464 | return MCDisassembler::Fail; |
| 2465 | } |
| 2466 | |
| 2467 | // Second input register |
| 2468 | switch (Inst.getOpcode()) { |
| 2469 | case ARM::VST3d8: |
| 2470 | case ARM::VST3d16: |
| 2471 | case ARM::VST3d32: |
| 2472 | case ARM::VST3d8_UPD: |
| 2473 | case ARM::VST3d16_UPD: |
| 2474 | case ARM::VST3d32_UPD: |
| 2475 | case ARM::VST4d8: |
| 2476 | case ARM::VST4d16: |
| 2477 | case ARM::VST4d32: |
| 2478 | case ARM::VST4d8_UPD: |
| 2479 | case ARM::VST4d16_UPD: |
| 2480 | case ARM::VST4d32_UPD: |
| 2481 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+1)%32, Address, Decoder))) |
| 2482 | return MCDisassembler::Fail; |
| 2483 | break; |
| 2484 | case ARM::VST3q8: |
| 2485 | case ARM::VST3q16: |
| 2486 | case ARM::VST3q32: |
| 2487 | case ARM::VST3q8_UPD: |
| 2488 | case ARM::VST3q16_UPD: |
| 2489 | case ARM::VST3q32_UPD: |
| 2490 | case ARM::VST4q8: |
| 2491 | case ARM::VST4q16: |
| 2492 | case ARM::VST4q32: |
| 2493 | case ARM::VST4q8_UPD: |
| 2494 | case ARM::VST4q16_UPD: |
| 2495 | case ARM::VST4q32_UPD: |
| 2496 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+2)%32, Address, Decoder))) |
| 2497 | return MCDisassembler::Fail; |
| 2498 | break; |
| 2499 | default: |
| 2500 | break; |
| 2501 | } |
| 2502 | |
| 2503 | // Third input register |
| 2504 | switch (Inst.getOpcode()) { |
| 2505 | case ARM::VST3d8: |
| 2506 | case ARM::VST3d16: |
| 2507 | case ARM::VST3d32: |
| 2508 | case ARM::VST3d8_UPD: |
| 2509 | case ARM::VST3d16_UPD: |
| 2510 | case ARM::VST3d32_UPD: |
| 2511 | case ARM::VST4d8: |
| 2512 | case ARM::VST4d16: |
| 2513 | case ARM::VST4d32: |
| 2514 | case ARM::VST4d8_UPD: |
| 2515 | case ARM::VST4d16_UPD: |
| 2516 | case ARM::VST4d32_UPD: |
| 2517 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+2)%32, Address, Decoder))) |
| 2518 | return MCDisassembler::Fail; |
| 2519 | break; |
| 2520 | case ARM::VST3q8: |
| 2521 | case ARM::VST3q16: |
| 2522 | case ARM::VST3q32: |
| 2523 | case ARM::VST3q8_UPD: |
| 2524 | case ARM::VST3q16_UPD: |
| 2525 | case ARM::VST3q32_UPD: |
| 2526 | case ARM::VST4q8: |
| 2527 | case ARM::VST4q16: |
| 2528 | case ARM::VST4q32: |
| 2529 | case ARM::VST4q8_UPD: |
| 2530 | case ARM::VST4q16_UPD: |
| 2531 | case ARM::VST4q32_UPD: |
| 2532 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+4)%32, Address, Decoder))) |
| 2533 | return MCDisassembler::Fail; |
| 2534 | break; |
| 2535 | default: |
| 2536 | break; |
| 2537 | } |
| 2538 | |
| 2539 | // Fourth input register |
| 2540 | switch (Inst.getOpcode()) { |
| 2541 | case ARM::VST4d8: |
| 2542 | case ARM::VST4d16: |
| 2543 | case ARM::VST4d32: |
| 2544 | case ARM::VST4d8_UPD: |
| 2545 | case ARM::VST4d16_UPD: |
| 2546 | case ARM::VST4d32_UPD: |
| 2547 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+3)%32, Address, Decoder))) |
| 2548 | return MCDisassembler::Fail; |
| 2549 | break; |
| 2550 | case ARM::VST4q8: |
| 2551 | case ARM::VST4q16: |
| 2552 | case ARM::VST4q32: |
| 2553 | case ARM::VST4q8_UPD: |
| 2554 | case ARM::VST4q16_UPD: |
| 2555 | case ARM::VST4q32_UPD: |
| 2556 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+6)%32, Address, Decoder))) |
| 2557 | return MCDisassembler::Fail; |
| 2558 | break; |
| 2559 | default: |
| 2560 | break; |
| 2561 | } |
| 2562 | |
| 2563 | DecodePredicateOperand(Inst, Decoder); |
| 2564 | return S; |
| 2565 | } |
| 2566 | |
| 2567 | static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Insn, |
| 2568 | uint64_t Address, |
| 2569 | const MCDisassembler *Decoder) { |
| 2570 | unsigned type = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 2571 | unsigned align = fieldFromInstruction(Insn, StartBit: 4, NumBits: 2); |
| 2572 | if (type == 6 && (align & 2)) return MCDisassembler::Fail; |
| 2573 | if (type == 7 && (align & 2)) return MCDisassembler::Fail; |
| 2574 | if (type == 10 && align == 3) return MCDisassembler::Fail; |
| 2575 | |
| 2576 | unsigned load = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 2577 | return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) |
| 2578 | : DecodeVSTInstruction(Inst, Insn, Address, Decoder); |
| 2579 | } |
| 2580 | |
| 2581 | static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Insn, |
| 2582 | uint64_t Address, |
| 2583 | const MCDisassembler *Decoder) { |
| 2584 | unsigned size = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 2585 | if (size == 3) return MCDisassembler::Fail; |
| 2586 | |
| 2587 | unsigned type = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 2588 | unsigned align = fieldFromInstruction(Insn, StartBit: 4, NumBits: 2); |
| 2589 | if (type == 8 && align == 3) return MCDisassembler::Fail; |
| 2590 | if (type == 9 && align == 3) return MCDisassembler::Fail; |
| 2591 | |
| 2592 | unsigned load = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 2593 | return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) |
| 2594 | : DecodeVSTInstruction(Inst, Insn, Address, Decoder); |
| 2595 | } |
| 2596 | |
| 2597 | static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Insn, |
| 2598 | uint64_t Address, |
| 2599 | const MCDisassembler *Decoder) { |
| 2600 | unsigned size = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 2601 | if (size == 3) return MCDisassembler::Fail; |
| 2602 | |
| 2603 | unsigned align = fieldFromInstruction(Insn, StartBit: 4, NumBits: 2); |
| 2604 | if (align & 2) return MCDisassembler::Fail; |
| 2605 | |
| 2606 | unsigned load = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 2607 | return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) |
| 2608 | : DecodeVSTInstruction(Inst, Insn, Address, Decoder); |
| 2609 | } |
| 2610 | |
| 2611 | static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Insn, |
| 2612 | uint64_t Address, |
| 2613 | const MCDisassembler *Decoder) { |
| 2614 | unsigned size = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 2615 | if (size == 3) return MCDisassembler::Fail; |
| 2616 | |
| 2617 | unsigned load = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 2618 | return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) |
| 2619 | : DecodeVSTInstruction(Inst, Insn, Address, Decoder); |
| 2620 | } |
| 2621 | |
| 2622 | static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn, |
| 2623 | uint64_t Address, |
| 2624 | const MCDisassembler *Decoder) { |
| 2625 | DecodeStatus S = MCDisassembler::Success; |
| 2626 | |
| 2627 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 2628 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 2629 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 2630 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2631 | unsigned align = fieldFromInstruction(Insn, StartBit: 4, NumBits: 1); |
| 2632 | unsigned size = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 2633 | |
| 2634 | if (size == 0 && align == 1) |
| 2635 | return MCDisassembler::Fail; |
| 2636 | align *= (1 << size); |
| 2637 | |
| 2638 | switch (Inst.getOpcode()) { |
| 2639 | case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8: |
| 2640 | case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register: |
| 2641 | case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register: |
| 2642 | case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register: |
| 2643 | if (!Check(Out&: S, In: DecodeDPairRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2644 | return MCDisassembler::Fail; |
| 2645 | break; |
| 2646 | default: |
| 2647 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2648 | return MCDisassembler::Fail; |
| 2649 | break; |
| 2650 | } |
| 2651 | if (Rm != 0xF) { |
| 2652 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 2653 | return MCDisassembler::Fail; |
| 2654 | } |
| 2655 | |
| 2656 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 2657 | return MCDisassembler::Fail; |
| 2658 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 2659 | |
| 2660 | // The fixed offset post-increment encodes Rm == 0xd. The no-writeback |
| 2661 | // variant encodes Rm == 0xf. Anything else is a register offset post- |
| 2662 | // increment and we need to add the register operand to the instruction. |
| 2663 | if (Rm != 0xD && Rm != 0xF && |
| 2664 | !Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 2665 | return MCDisassembler::Fail; |
| 2666 | |
| 2667 | DecodePredicateOperand(Inst, Decoder); |
| 2668 | return S; |
| 2669 | } |
| 2670 | |
| 2671 | static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn, |
| 2672 | uint64_t Address, |
| 2673 | const MCDisassembler *Decoder) { |
| 2674 | DecodeStatus S = MCDisassembler::Success; |
| 2675 | |
| 2676 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 2677 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 2678 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 2679 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2680 | unsigned align = fieldFromInstruction(Insn, StartBit: 4, NumBits: 1); |
| 2681 | unsigned size = 1 << fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 2682 | align *= 2*size; |
| 2683 | |
| 2684 | switch (Inst.getOpcode()) { |
| 2685 | case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8: |
| 2686 | case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register: |
| 2687 | case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register: |
| 2688 | case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register: |
| 2689 | if (!Check(Out&: S, In: DecodeDPairRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2690 | return MCDisassembler::Fail; |
| 2691 | break; |
| 2692 | case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2: |
| 2693 | case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register: |
| 2694 | case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register: |
| 2695 | case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register: |
| 2696 | if (!Check(Out&: S, In: DecodeDPairSpacedRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2697 | return MCDisassembler::Fail; |
| 2698 | break; |
| 2699 | default: |
| 2700 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2701 | return MCDisassembler::Fail; |
| 2702 | break; |
| 2703 | } |
| 2704 | |
| 2705 | if (Rm != 0xF) |
| 2706 | Inst.addOperand(Op: MCOperand::createImm(Val: 0)); |
| 2707 | |
| 2708 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 2709 | return MCDisassembler::Fail; |
| 2710 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 2711 | |
| 2712 | if (Rm != 0xD && Rm != 0xF) { |
| 2713 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 2714 | return MCDisassembler::Fail; |
| 2715 | } |
| 2716 | |
| 2717 | DecodePredicateOperand(Inst, Decoder); |
| 2718 | return S; |
| 2719 | } |
| 2720 | |
| 2721 | static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn, |
| 2722 | uint64_t Address, |
| 2723 | const MCDisassembler *Decoder) { |
| 2724 | DecodeStatus S = MCDisassembler::Success; |
| 2725 | |
| 2726 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 2727 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 2728 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 2729 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2730 | unsigned inc = fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) + 1; |
| 2731 | |
| 2732 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2733 | return MCDisassembler::Fail; |
| 2734 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+inc)%32, Address, Decoder))) |
| 2735 | return MCDisassembler::Fail; |
| 2736 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+2*inc)%32, Address, Decoder))) |
| 2737 | return MCDisassembler::Fail; |
| 2738 | if (Rm != 0xF) { |
| 2739 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 2740 | return MCDisassembler::Fail; |
| 2741 | } |
| 2742 | |
| 2743 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 2744 | return MCDisassembler::Fail; |
| 2745 | Inst.addOperand(Op: MCOperand::createImm(Val: 0)); |
| 2746 | |
| 2747 | if (Rm == 0xD) |
| 2748 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 2749 | else if (Rm != 0xF) { |
| 2750 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 2751 | return MCDisassembler::Fail; |
| 2752 | } |
| 2753 | |
| 2754 | DecodePredicateOperand(Inst, Decoder); |
| 2755 | return S; |
| 2756 | } |
| 2757 | |
| 2758 | static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn, |
| 2759 | uint64_t Address, |
| 2760 | const MCDisassembler *Decoder) { |
| 2761 | DecodeStatus S = MCDisassembler::Success; |
| 2762 | |
| 2763 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 2764 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 2765 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 2766 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2767 | unsigned size = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 2768 | unsigned inc = fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) + 1; |
| 2769 | unsigned align = fieldFromInstruction(Insn, StartBit: 4, NumBits: 1); |
| 2770 | |
| 2771 | if (size == 0x3) { |
| 2772 | if (align == 0) |
| 2773 | return MCDisassembler::Fail; |
| 2774 | align = 16; |
| 2775 | } else { |
| 2776 | if (size == 2) { |
| 2777 | align *= 8; |
| 2778 | } else { |
| 2779 | size = 1 << size; |
| 2780 | align *= 4*size; |
| 2781 | } |
| 2782 | } |
| 2783 | |
| 2784 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2785 | return MCDisassembler::Fail; |
| 2786 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+inc)%32, Address, Decoder))) |
| 2787 | return MCDisassembler::Fail; |
| 2788 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+2*inc)%32, Address, Decoder))) |
| 2789 | return MCDisassembler::Fail; |
| 2790 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: (Rd+3*inc)%32, Address, Decoder))) |
| 2791 | return MCDisassembler::Fail; |
| 2792 | if (Rm != 0xF) { |
| 2793 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 2794 | return MCDisassembler::Fail; |
| 2795 | } |
| 2796 | |
| 2797 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 2798 | return MCDisassembler::Fail; |
| 2799 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 2800 | |
| 2801 | if (Rm == 0xD) |
| 2802 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 2803 | else if (Rm != 0xF) { |
| 2804 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 2805 | return MCDisassembler::Fail; |
| 2806 | } |
| 2807 | |
| 2808 | DecodePredicateOperand(Inst, Decoder); |
| 2809 | return S; |
| 2810 | } |
| 2811 | |
| 2812 | static DecodeStatus DecodeVMOVModImmInstruction(MCInst &Inst, unsigned Insn, |
| 2813 | uint64_t Address, |
| 2814 | const MCDisassembler *Decoder) { |
| 2815 | DecodeStatus S = MCDisassembler::Success; |
| 2816 | |
| 2817 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 2818 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 2819 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2820 | imm |= fieldFromInstruction(Insn, StartBit: 16, NumBits: 3) << 4; |
| 2821 | imm |= fieldFromInstruction(Insn, StartBit: 24, NumBits: 1) << 7; |
| 2822 | imm |= fieldFromInstruction(Insn, StartBit: 8, NumBits: 4) << 8; |
| 2823 | imm |= fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 12; |
| 2824 | unsigned Q = fieldFromInstruction(Insn, StartBit: 6, NumBits: 1); |
| 2825 | |
| 2826 | if (Q) { |
| 2827 | if (!Check(Out&: S, In: DecodeQPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2828 | return MCDisassembler::Fail; |
| 2829 | } else { |
| 2830 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2831 | return MCDisassembler::Fail; |
| 2832 | } |
| 2833 | |
| 2834 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 2835 | |
| 2836 | switch (Inst.getOpcode()) { |
| 2837 | case ARM::VORRiv4i16: |
| 2838 | case ARM::VORRiv2i32: |
| 2839 | case ARM::VBICiv4i16: |
| 2840 | case ARM::VBICiv2i32: |
| 2841 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2842 | return MCDisassembler::Fail; |
| 2843 | break; |
| 2844 | case ARM::VORRiv8i16: |
| 2845 | case ARM::VORRiv4i32: |
| 2846 | case ARM::VBICiv8i16: |
| 2847 | case ARM::VBICiv4i32: |
| 2848 | if (!Check(Out&: S, In: DecodeQPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2849 | return MCDisassembler::Fail; |
| 2850 | break; |
| 2851 | default: |
| 2852 | break; |
| 2853 | } |
| 2854 | |
| 2855 | DecodePredicateOperand(Inst, Decoder); |
| 2856 | return S; |
| 2857 | } |
| 2858 | |
| 2859 | static DecodeStatus DecodeMVEModImmInstruction(MCInst &Inst, unsigned Insn, |
| 2860 | uint64_t Address, |
| 2861 | const MCDisassembler *Decoder) { |
| 2862 | DecodeStatus S = MCDisassembler::Success; |
| 2863 | |
| 2864 | unsigned Qd = ((fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 3) | |
| 2865 | fieldFromInstruction(Insn, StartBit: 13, NumBits: 3)); |
| 2866 | unsigned cmode = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 2867 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2868 | imm |= fieldFromInstruction(Insn, StartBit: 16, NumBits: 3) << 4; |
| 2869 | imm |= fieldFromInstruction(Insn, StartBit: 28, NumBits: 1) << 7; |
| 2870 | imm |= cmode << 8; |
| 2871 | imm |= fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 12; |
| 2872 | |
| 2873 | if (cmode == 0xF && Inst.getOpcode() == ARM::MVE_VMVNimmi32) |
| 2874 | return MCDisassembler::Fail; |
| 2875 | |
| 2876 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qd, Address, Decoder))) |
| 2877 | return MCDisassembler::Fail; |
| 2878 | |
| 2879 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 2880 | |
| 2881 | Check(Out&: S, In: DecodeVpredROperand(Inst, Decoder)); |
| 2882 | return S; |
| 2883 | } |
| 2884 | |
| 2885 | static DecodeStatus DecodeMVEVADCInstruction(MCInst &Inst, unsigned Insn, |
| 2886 | uint64_t Address, |
| 2887 | const MCDisassembler *Decoder) { |
| 2888 | DecodeStatus S = MCDisassembler::Success; |
| 2889 | |
| 2890 | unsigned Qd = fieldFromInstruction(Insn, StartBit: 13, NumBits: 3); |
| 2891 | Qd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 3; |
| 2892 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qd, Address, Decoder))) |
| 2893 | return MCDisassembler::Fail; |
| 2894 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::FPSCR_NZCV)); |
| 2895 | |
| 2896 | unsigned Qn = fieldFromInstruction(Insn, StartBit: 17, NumBits: 3); |
| 2897 | Qn |= fieldFromInstruction(Insn, StartBit: 7, NumBits: 1) << 3; |
| 2898 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qn, Address, Decoder))) |
| 2899 | return MCDisassembler::Fail; |
| 2900 | unsigned Qm = fieldFromInstruction(Insn, StartBit: 1, NumBits: 3); |
| 2901 | Qm |= fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 3; |
| 2902 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qm, Address, Decoder))) |
| 2903 | return MCDisassembler::Fail; |
| 2904 | if (!fieldFromInstruction(Insn, StartBit: 12, NumBits: 1)) // I bit clear => need input FPSCR |
| 2905 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::FPSCR_NZCV)); |
| 2906 | |
| 2907 | Check(Out&: S, In: DecodeVpredROperand(Inst, Decoder)); |
| 2908 | return S; |
| 2909 | } |
| 2910 | |
| 2911 | static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn, |
| 2912 | uint64_t Address, |
| 2913 | const MCDisassembler *Decoder) { |
| 2914 | DecodeStatus S = MCDisassembler::Success; |
| 2915 | |
| 2916 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 2917 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 2918 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2919 | Rm |= fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 4; |
| 2920 | unsigned size = fieldFromInstruction(Insn, StartBit: 18, NumBits: 2); |
| 2921 | |
| 2922 | if (!Check(Out&: S, In: DecodeQPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2923 | return MCDisassembler::Fail; |
| 2924 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 2925 | return MCDisassembler::Fail; |
| 2926 | Inst.addOperand(Op: MCOperand::createImm(Val: 8 << size)); |
| 2927 | |
| 2928 | DecodePredicateOperand(Inst, Decoder); |
| 2929 | return S; |
| 2930 | } |
| 2931 | |
| 2932 | static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val, |
| 2933 | uint64_t Address, |
| 2934 | const MCDisassembler *Decoder) { |
| 2935 | Inst.addOperand(Op: MCOperand::createImm(Val: 8 - Val)); |
| 2936 | return MCDisassembler::Success; |
| 2937 | } |
| 2938 | |
| 2939 | static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val, |
| 2940 | uint64_t Address, |
| 2941 | const MCDisassembler *Decoder) { |
| 2942 | Inst.addOperand(Op: MCOperand::createImm(Val: 16 - Val)); |
| 2943 | return MCDisassembler::Success; |
| 2944 | } |
| 2945 | |
| 2946 | static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val, |
| 2947 | uint64_t Address, |
| 2948 | const MCDisassembler *Decoder) { |
| 2949 | Inst.addOperand(Op: MCOperand::createImm(Val: 32 - Val)); |
| 2950 | return MCDisassembler::Success; |
| 2951 | } |
| 2952 | |
| 2953 | static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val, |
| 2954 | uint64_t Address, |
| 2955 | const MCDisassembler *Decoder) { |
| 2956 | Inst.addOperand(Op: MCOperand::createImm(Val: 64 - Val)); |
| 2957 | return MCDisassembler::Success; |
| 2958 | } |
| 2959 | |
| 2960 | static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn, |
| 2961 | uint64_t Address, |
| 2962 | const MCDisassembler *Decoder) { |
| 2963 | DecodeStatus S = MCDisassembler::Success; |
| 2964 | |
| 2965 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 2966 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 2967 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 2968 | Rn |= fieldFromInstruction(Insn, StartBit: 7, NumBits: 1) << 4; |
| 2969 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 2970 | Rm |= fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 4; |
| 2971 | unsigned op = fieldFromInstruction(Insn, StartBit: 6, NumBits: 1); |
| 2972 | |
| 2973 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2974 | return MCDisassembler::Fail; |
| 2975 | if (op) { |
| 2976 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 2977 | return MCDisassembler::Fail; // Writeback |
| 2978 | } |
| 2979 | |
| 2980 | switch (Inst.getOpcode()) { |
| 2981 | case ARM::VTBL2: |
| 2982 | case ARM::VTBX2: |
| 2983 | if (!Check(Out&: S, In: DecodeDPairRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 2984 | return MCDisassembler::Fail; |
| 2985 | break; |
| 2986 | default: |
| 2987 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 2988 | return MCDisassembler::Fail; |
| 2989 | } |
| 2990 | |
| 2991 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 2992 | return MCDisassembler::Fail; |
| 2993 | |
| 2994 | DecodePredicateOperand(Inst, Decoder); |
| 2995 | return S; |
| 2996 | } |
| 2997 | |
| 2998 | static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn, |
| 2999 | uint64_t Address, |
| 3000 | const MCDisassembler *Decoder) { |
| 3001 | DecodeStatus S = MCDisassembler::Success; |
| 3002 | |
| 3003 | unsigned dst = fieldFromInstruction(Insn, StartBit: 8, NumBits: 3); |
| 3004 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 3005 | |
| 3006 | if (!Check(Out&: S, In: DecodetGPRRegisterClass(Inst, RegNo: dst, Address, Decoder))) |
| 3007 | return MCDisassembler::Fail; |
| 3008 | |
| 3009 | switch(Inst.getOpcode()) { |
| 3010 | default: |
| 3011 | return MCDisassembler::Fail; |
| 3012 | case ARM::tADR: |
| 3013 | break; // tADR does not explicitly represent the PC as an operand. |
| 3014 | case ARM::tADDrSPi: |
| 3015 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::SP)); |
| 3016 | break; |
| 3017 | } |
| 3018 | |
| 3019 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3020 | DecodePredicateOperand(Inst, Decoder); |
| 3021 | return S; |
| 3022 | } |
| 3023 | |
| 3024 | static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val, |
| 3025 | uint64_t Address, |
| 3026 | const MCDisassembler *Decoder) { |
| 3027 | if (!tryAddingSymbolicOperand(Address, Value: Address + SignExtend32<12>(X: Val<<1) + 4, |
| 3028 | isBranch: true, InstSize: 2, MI&: Inst, Decoder)) |
| 3029 | Inst.addOperand(Op: MCOperand::createImm(Val: SignExtend32<12>(X: Val << 1))); |
| 3030 | return MCDisassembler::Success; |
| 3031 | } |
| 3032 | |
| 3033 | static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val, |
| 3034 | uint64_t Address, |
| 3035 | const MCDisassembler *Decoder) { |
| 3036 | if (!tryAddingSymbolicOperand(Address, Value: Address + SignExtend32<21>(X: Val) + 4, |
| 3037 | isBranch: true, InstSize: 4, MI&: Inst, Decoder)) |
| 3038 | Inst.addOperand(Op: MCOperand::createImm(Val: SignExtend32<21>(X: Val))); |
| 3039 | return MCDisassembler::Success; |
| 3040 | } |
| 3041 | |
| 3042 | static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val, |
| 3043 | uint64_t Address, |
| 3044 | const MCDisassembler *Decoder) { |
| 3045 | if (!tryAddingSymbolicOperand(Address, Value: Address + (Val<<1) + 4, |
| 3046 | isBranch: true, InstSize: 2, MI&: Inst, Decoder)) |
| 3047 | Inst.addOperand(Op: MCOperand::createImm(Val: Val << 1)); |
| 3048 | return MCDisassembler::Success; |
| 3049 | } |
| 3050 | |
| 3051 | static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val, |
| 3052 | uint64_t Address, |
| 3053 | const MCDisassembler *Decoder) { |
| 3054 | DecodeStatus S = MCDisassembler::Success; |
| 3055 | |
| 3056 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 3); |
| 3057 | unsigned Rm = fieldFromInstruction(Insn: Val, StartBit: 3, NumBits: 3); |
| 3058 | |
| 3059 | if (!Check(Out&: S, In: DecodetGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3060 | return MCDisassembler::Fail; |
| 3061 | if (!Check(Out&: S, In: DecodetGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 3062 | return MCDisassembler::Fail; |
| 3063 | |
| 3064 | return S; |
| 3065 | } |
| 3066 | |
| 3067 | static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val, |
| 3068 | uint64_t Address, |
| 3069 | const MCDisassembler *Decoder) { |
| 3070 | DecodeStatus S = MCDisassembler::Success; |
| 3071 | |
| 3072 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 3); |
| 3073 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 3, NumBits: 5); |
| 3074 | |
| 3075 | if (!Check(Out&: S, In: DecodetGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3076 | return MCDisassembler::Fail; |
| 3077 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3078 | |
| 3079 | return S; |
| 3080 | } |
| 3081 | |
| 3082 | static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val, |
| 3083 | uint64_t Address, |
| 3084 | const MCDisassembler *Decoder) { |
| 3085 | unsigned imm = Val << 2; |
| 3086 | |
| 3087 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3088 | tryAddingPcLoadReferenceComment(Address, Value: (Address & ~2u) + imm + 4, Decoder); |
| 3089 | |
| 3090 | return MCDisassembler::Success; |
| 3091 | } |
| 3092 | |
| 3093 | static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val, |
| 3094 | uint64_t Address, |
| 3095 | const MCDisassembler *Decoder) { |
| 3096 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::SP)); |
| 3097 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 3098 | |
| 3099 | return MCDisassembler::Success; |
| 3100 | } |
| 3101 | |
| 3102 | static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val, |
| 3103 | uint64_t Address, |
| 3104 | const MCDisassembler *Decoder) { |
| 3105 | DecodeStatus S = MCDisassembler::Success; |
| 3106 | |
| 3107 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 6, NumBits: 4); |
| 3108 | unsigned Rm = fieldFromInstruction(Insn: Val, StartBit: 2, NumBits: 4); |
| 3109 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 2); |
| 3110 | |
| 3111 | // Thumb stores cannot use PC as dest register. |
| 3112 | switch (Inst.getOpcode()) { |
| 3113 | case ARM::t2STRHs: |
| 3114 | case ARM::t2STRBs: |
| 3115 | case ARM::t2STRs: |
| 3116 | if (Rn == 15) |
| 3117 | return MCDisassembler::Fail; |
| 3118 | break; |
| 3119 | default: |
| 3120 | break; |
| 3121 | } |
| 3122 | |
| 3123 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3124 | return MCDisassembler::Fail; |
| 3125 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 3126 | return MCDisassembler::Fail; |
| 3127 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3128 | |
| 3129 | return S; |
| 3130 | } |
| 3131 | |
| 3132 | static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn, |
| 3133 | uint64_t Address, |
| 3134 | const MCDisassembler *Decoder) { |
| 3135 | DecodeStatus S = MCDisassembler::Success; |
| 3136 | |
| 3137 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 3138 | unsigned U = fieldFromInstruction(Insn, StartBit: 23, NumBits: 1); |
| 3139 | int imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 12); |
| 3140 | |
| 3141 | const FeatureBitset &featureBits = |
| 3142 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 3143 | |
| 3144 | bool hasV7Ops = featureBits[ARM::HasV7Ops]; |
| 3145 | |
| 3146 | if (Rt == 15) { |
| 3147 | switch (Inst.getOpcode()) { |
| 3148 | case ARM::t2LDRBpci: |
| 3149 | case ARM::t2LDRHpci: |
| 3150 | Inst.setOpcode(ARM::t2PLDpci); |
| 3151 | break; |
| 3152 | case ARM::t2LDRSBpci: |
| 3153 | Inst.setOpcode(ARM::t2PLIpci); |
| 3154 | break; |
| 3155 | case ARM::t2LDRSHpci: |
| 3156 | return MCDisassembler::Fail; |
| 3157 | default: |
| 3158 | break; |
| 3159 | } |
| 3160 | } |
| 3161 | |
| 3162 | switch(Inst.getOpcode()) { |
| 3163 | case ARM::t2PLDpci: |
| 3164 | break; |
| 3165 | case ARM::t2PLIpci: |
| 3166 | if (!hasV7Ops) |
| 3167 | return MCDisassembler::Fail; |
| 3168 | break; |
| 3169 | default: |
| 3170 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 3171 | return MCDisassembler::Fail; |
| 3172 | } |
| 3173 | |
| 3174 | if (!U) { |
| 3175 | // Special case for #-0. |
| 3176 | if (imm == 0) |
| 3177 | imm = INT32_MIN; |
| 3178 | else |
| 3179 | imm = -imm; |
| 3180 | } |
| 3181 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3182 | |
| 3183 | DecodePredicateOperand(Inst, Decoder); |
| 3184 | return S; |
| 3185 | } |
| 3186 | |
| 3187 | static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn, |
| 3188 | uint64_t Address, |
| 3189 | const MCDisassembler *Decoder) { |
| 3190 | DecodeStatus S = MCDisassembler::Success; |
| 3191 | |
| 3192 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 3193 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 3194 | |
| 3195 | const FeatureBitset &featureBits = |
| 3196 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 3197 | |
| 3198 | bool hasMP = featureBits[ARM::FeatureMP]; |
| 3199 | bool hasV7Ops = featureBits[ARM::HasV7Ops]; |
| 3200 | |
| 3201 | if (Rn == 15) { |
| 3202 | switch (Inst.getOpcode()) { |
| 3203 | case ARM::t2LDRBs: |
| 3204 | Inst.setOpcode(ARM::t2LDRBpci); |
| 3205 | break; |
| 3206 | case ARM::t2LDRHs: |
| 3207 | Inst.setOpcode(ARM::t2LDRHpci); |
| 3208 | break; |
| 3209 | case ARM::t2LDRSHs: |
| 3210 | Inst.setOpcode(ARM::t2LDRSHpci); |
| 3211 | break; |
| 3212 | case ARM::t2LDRSBs: |
| 3213 | Inst.setOpcode(ARM::t2LDRSBpci); |
| 3214 | break; |
| 3215 | case ARM::t2LDRs: |
| 3216 | Inst.setOpcode(ARM::t2LDRpci); |
| 3217 | break; |
| 3218 | case ARM::t2PLDs: |
| 3219 | Inst.setOpcode(ARM::t2PLDpci); |
| 3220 | break; |
| 3221 | case ARM::t2PLIs: |
| 3222 | Inst.setOpcode(ARM::t2PLIpci); |
| 3223 | break; |
| 3224 | default: |
| 3225 | return MCDisassembler::Fail; |
| 3226 | } |
| 3227 | |
| 3228 | return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); |
| 3229 | } |
| 3230 | |
| 3231 | if (Rt == 15) { |
| 3232 | switch (Inst.getOpcode()) { |
| 3233 | case ARM::t2LDRSHs: |
| 3234 | return MCDisassembler::Fail; |
| 3235 | case ARM::t2LDRHs: |
| 3236 | Inst.setOpcode(ARM::t2PLDWs); |
| 3237 | break; |
| 3238 | case ARM::t2LDRSBs: |
| 3239 | Inst.setOpcode(ARM::t2PLIs); |
| 3240 | break; |
| 3241 | default: |
| 3242 | break; |
| 3243 | } |
| 3244 | } |
| 3245 | |
| 3246 | switch (Inst.getOpcode()) { |
| 3247 | case ARM::t2PLDs: |
| 3248 | break; |
| 3249 | case ARM::t2PLIs: |
| 3250 | if (!hasV7Ops) |
| 3251 | return MCDisassembler::Fail; |
| 3252 | break; |
| 3253 | case ARM::t2PLDWs: |
| 3254 | if (!hasV7Ops || !hasMP) |
| 3255 | return MCDisassembler::Fail; |
| 3256 | break; |
| 3257 | default: |
| 3258 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 3259 | return MCDisassembler::Fail; |
| 3260 | } |
| 3261 | |
| 3262 | unsigned addrmode = fieldFromInstruction(Insn, StartBit: 4, NumBits: 2); |
| 3263 | addrmode |= fieldFromInstruction(Insn, StartBit: 0, NumBits: 4) << 2; |
| 3264 | addrmode |= fieldFromInstruction(Insn, StartBit: 16, NumBits: 4) << 6; |
| 3265 | if (!Check(Out&: S, In: DecodeT2AddrModeSOReg(Inst, Val: addrmode, Address, Decoder))) |
| 3266 | return MCDisassembler::Fail; |
| 3267 | |
| 3268 | DecodePredicateOperand(Inst, Decoder); |
| 3269 | return S; |
| 3270 | } |
| 3271 | |
| 3272 | static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val, uint64_t Address, |
| 3273 | const MCDisassembler *Decoder) { |
| 3274 | int imm = Val & 0xFF; |
| 3275 | if (Val == 0) |
| 3276 | imm = INT32_MIN; |
| 3277 | else if (!(Val & 0x100)) |
| 3278 | imm *= -1; |
| 3279 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3280 | |
| 3281 | return MCDisassembler::Success; |
| 3282 | } |
| 3283 | |
| 3284 | static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val, |
| 3285 | uint64_t Address, |
| 3286 | const MCDisassembler *Decoder) { |
| 3287 | DecodeStatus S = MCDisassembler::Success; |
| 3288 | |
| 3289 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 9, NumBits: 4); |
| 3290 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 9); |
| 3291 | |
| 3292 | // Thumb stores cannot use PC as dest register. |
| 3293 | switch (Inst.getOpcode()) { |
| 3294 | case ARM::t2STRT: |
| 3295 | case ARM::t2STRBT: |
| 3296 | case ARM::t2STRHT: |
| 3297 | case ARM::t2STRi8: |
| 3298 | case ARM::t2STRHi8: |
| 3299 | case ARM::t2STRBi8: |
| 3300 | if (Rn == 15) |
| 3301 | return MCDisassembler::Fail; |
| 3302 | break; |
| 3303 | default: |
| 3304 | break; |
| 3305 | } |
| 3306 | |
| 3307 | // Some instructions always use an additive offset. |
| 3308 | switch (Inst.getOpcode()) { |
| 3309 | case ARM::t2LDRT: |
| 3310 | case ARM::t2LDRBT: |
| 3311 | case ARM::t2LDRHT: |
| 3312 | case ARM::t2LDRSBT: |
| 3313 | case ARM::t2LDRSHT: |
| 3314 | case ARM::t2STRT: |
| 3315 | case ARM::t2STRBT: |
| 3316 | case ARM::t2STRHT: |
| 3317 | imm |= 0x100; |
| 3318 | break; |
| 3319 | default: |
| 3320 | break; |
| 3321 | } |
| 3322 | |
| 3323 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3324 | return MCDisassembler::Fail; |
| 3325 | if (!Check(Out&: S, In: DecodeT2Imm8(Inst, Val: imm, Address, Decoder))) |
| 3326 | return MCDisassembler::Fail; |
| 3327 | |
| 3328 | return S; |
| 3329 | } |
| 3330 | |
| 3331 | static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn, |
| 3332 | uint64_t Address, |
| 3333 | const MCDisassembler *Decoder) { |
| 3334 | DecodeStatus S = MCDisassembler::Success; |
| 3335 | |
| 3336 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 3337 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 3338 | unsigned U = fieldFromInstruction(Insn, StartBit: 9, NumBits: 1); |
| 3339 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 3340 | imm |= (U << 8); |
| 3341 | imm |= (Rn << 9); |
| 3342 | unsigned add = fieldFromInstruction(Insn, StartBit: 9, NumBits: 1); |
| 3343 | |
| 3344 | const FeatureBitset &featureBits = |
| 3345 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 3346 | |
| 3347 | bool hasMP = featureBits[ARM::FeatureMP]; |
| 3348 | bool hasV7Ops = featureBits[ARM::HasV7Ops]; |
| 3349 | |
| 3350 | if (Rn == 15) { |
| 3351 | switch (Inst.getOpcode()) { |
| 3352 | case ARM::t2LDRi8: |
| 3353 | Inst.setOpcode(ARM::t2LDRpci); |
| 3354 | break; |
| 3355 | case ARM::t2LDRBi8: |
| 3356 | Inst.setOpcode(ARM::t2LDRBpci); |
| 3357 | break; |
| 3358 | case ARM::t2LDRSBi8: |
| 3359 | Inst.setOpcode(ARM::t2LDRSBpci); |
| 3360 | break; |
| 3361 | case ARM::t2LDRHi8: |
| 3362 | Inst.setOpcode(ARM::t2LDRHpci); |
| 3363 | break; |
| 3364 | case ARM::t2LDRSHi8: |
| 3365 | Inst.setOpcode(ARM::t2LDRSHpci); |
| 3366 | break; |
| 3367 | case ARM::t2PLDi8: |
| 3368 | Inst.setOpcode(ARM::t2PLDpci); |
| 3369 | break; |
| 3370 | case ARM::t2PLIi8: |
| 3371 | Inst.setOpcode(ARM::t2PLIpci); |
| 3372 | break; |
| 3373 | default: |
| 3374 | return MCDisassembler::Fail; |
| 3375 | } |
| 3376 | return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); |
| 3377 | } |
| 3378 | |
| 3379 | if (Rt == 15) { |
| 3380 | switch (Inst.getOpcode()) { |
| 3381 | case ARM::t2LDRSHi8: |
| 3382 | return MCDisassembler::Fail; |
| 3383 | case ARM::t2LDRHi8: |
| 3384 | if (!add) |
| 3385 | Inst.setOpcode(ARM::t2PLDWi8); |
| 3386 | break; |
| 3387 | case ARM::t2LDRSBi8: |
| 3388 | Inst.setOpcode(ARM::t2PLIi8); |
| 3389 | break; |
| 3390 | default: |
| 3391 | break; |
| 3392 | } |
| 3393 | } |
| 3394 | |
| 3395 | switch (Inst.getOpcode()) { |
| 3396 | case ARM::t2PLDi8: |
| 3397 | break; |
| 3398 | case ARM::t2PLIi8: |
| 3399 | if (!hasV7Ops) |
| 3400 | return MCDisassembler::Fail; |
| 3401 | break; |
| 3402 | case ARM::t2PLDWi8: |
| 3403 | if (!hasV7Ops || !hasMP) |
| 3404 | return MCDisassembler::Fail; |
| 3405 | break; |
| 3406 | default: |
| 3407 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 3408 | return MCDisassembler::Fail; |
| 3409 | } |
| 3410 | |
| 3411 | if (!Check(Out&: S, In: DecodeT2AddrModeImm8(Inst, Val: imm, Address, Decoder))) |
| 3412 | return MCDisassembler::Fail; |
| 3413 | DecodePredicateOperand(Inst, Decoder); |
| 3414 | return S; |
| 3415 | } |
| 3416 | |
| 3417 | static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val, |
| 3418 | uint64_t Address, |
| 3419 | const MCDisassembler *Decoder) { |
| 3420 | DecodeStatus S = MCDisassembler::Success; |
| 3421 | |
| 3422 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 13, NumBits: 4); |
| 3423 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 12); |
| 3424 | |
| 3425 | // Thumb stores cannot use PC as dest register. |
| 3426 | switch (Inst.getOpcode()) { |
| 3427 | case ARM::t2STRi12: |
| 3428 | case ARM::t2STRBi12: |
| 3429 | case ARM::t2STRHi12: |
| 3430 | if (Rn == 15) |
| 3431 | return MCDisassembler::Fail; |
| 3432 | break; |
| 3433 | default: |
| 3434 | break; |
| 3435 | } |
| 3436 | |
| 3437 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3438 | return MCDisassembler::Fail; |
| 3439 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3440 | |
| 3441 | return S; |
| 3442 | } |
| 3443 | |
| 3444 | static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn, |
| 3445 | uint64_t Address, |
| 3446 | const MCDisassembler *Decoder) { |
| 3447 | DecodeStatus S = MCDisassembler::Success; |
| 3448 | |
| 3449 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 3450 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 3451 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 12); |
| 3452 | imm |= (Rn << 13); |
| 3453 | |
| 3454 | const FeatureBitset &featureBits = |
| 3455 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 3456 | |
| 3457 | bool hasMP = featureBits[ARM::FeatureMP]; |
| 3458 | bool hasV7Ops = featureBits[ARM::HasV7Ops]; |
| 3459 | |
| 3460 | if (Rn == 15) { |
| 3461 | switch (Inst.getOpcode()) { |
| 3462 | case ARM::t2LDRi12: |
| 3463 | Inst.setOpcode(ARM::t2LDRpci); |
| 3464 | break; |
| 3465 | case ARM::t2LDRHi12: |
| 3466 | Inst.setOpcode(ARM::t2LDRHpci); |
| 3467 | break; |
| 3468 | case ARM::t2LDRSHi12: |
| 3469 | Inst.setOpcode(ARM::t2LDRSHpci); |
| 3470 | break; |
| 3471 | case ARM::t2LDRBi12: |
| 3472 | Inst.setOpcode(ARM::t2LDRBpci); |
| 3473 | break; |
| 3474 | case ARM::t2LDRSBi12: |
| 3475 | Inst.setOpcode(ARM::t2LDRSBpci); |
| 3476 | break; |
| 3477 | case ARM::t2PLDi12: |
| 3478 | Inst.setOpcode(ARM::t2PLDpci); |
| 3479 | break; |
| 3480 | case ARM::t2PLIi12: |
| 3481 | Inst.setOpcode(ARM::t2PLIpci); |
| 3482 | break; |
| 3483 | default: |
| 3484 | return MCDisassembler::Fail; |
| 3485 | } |
| 3486 | return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); |
| 3487 | } |
| 3488 | |
| 3489 | if (Rt == 15) { |
| 3490 | switch (Inst.getOpcode()) { |
| 3491 | case ARM::t2LDRSHi12: |
| 3492 | return MCDisassembler::Fail; |
| 3493 | case ARM::t2LDRHi12: |
| 3494 | Inst.setOpcode(ARM::t2PLDWi12); |
| 3495 | break; |
| 3496 | case ARM::t2LDRSBi12: |
| 3497 | Inst.setOpcode(ARM::t2PLIi12); |
| 3498 | break; |
| 3499 | default: |
| 3500 | break; |
| 3501 | } |
| 3502 | } |
| 3503 | |
| 3504 | switch (Inst.getOpcode()) { |
| 3505 | case ARM::t2PLDi12: |
| 3506 | break; |
| 3507 | case ARM::t2PLIi12: |
| 3508 | if (!hasV7Ops) |
| 3509 | return MCDisassembler::Fail; |
| 3510 | break; |
| 3511 | case ARM::t2PLDWi12: |
| 3512 | if (!hasV7Ops || !hasMP) |
| 3513 | return MCDisassembler::Fail; |
| 3514 | break; |
| 3515 | default: |
| 3516 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 3517 | return MCDisassembler::Fail; |
| 3518 | } |
| 3519 | |
| 3520 | if (!Check(Out&: S, In: DecodeT2AddrModeImm12(Inst, Val: imm, Address, Decoder))) |
| 3521 | return MCDisassembler::Fail; |
| 3522 | DecodePredicateOperand(Inst, Decoder); |
| 3523 | return S; |
| 3524 | } |
| 3525 | |
| 3526 | static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 3527 | const MCDisassembler *Decoder) { |
| 3528 | DecodeStatus S = MCDisassembler::Success; |
| 3529 | |
| 3530 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 3531 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 3532 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 3533 | imm |= (Rn << 9); |
| 3534 | |
| 3535 | if (Rn == 15) { |
| 3536 | switch (Inst.getOpcode()) { |
| 3537 | case ARM::t2LDRT: |
| 3538 | Inst.setOpcode(ARM::t2LDRpci); |
| 3539 | break; |
| 3540 | case ARM::t2LDRBT: |
| 3541 | Inst.setOpcode(ARM::t2LDRBpci); |
| 3542 | break; |
| 3543 | case ARM::t2LDRHT: |
| 3544 | Inst.setOpcode(ARM::t2LDRHpci); |
| 3545 | break; |
| 3546 | case ARM::t2LDRSBT: |
| 3547 | Inst.setOpcode(ARM::t2LDRSBpci); |
| 3548 | break; |
| 3549 | case ARM::t2LDRSHT: |
| 3550 | Inst.setOpcode(ARM::t2LDRSHpci); |
| 3551 | break; |
| 3552 | default: |
| 3553 | return MCDisassembler::Fail; |
| 3554 | } |
| 3555 | return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); |
| 3556 | } |
| 3557 | |
| 3558 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 3559 | return MCDisassembler::Fail; |
| 3560 | if (!Check(Out&: S, In: DecodeT2AddrModeImm8(Inst, Val: imm, Address, Decoder))) |
| 3561 | return MCDisassembler::Fail; |
| 3562 | DecodePredicateOperand(Inst, Decoder); |
| 3563 | return S; |
| 3564 | } |
| 3565 | |
| 3566 | static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val, uint64_t Address, |
| 3567 | const MCDisassembler *Decoder) { |
| 3568 | if (Val == 0) |
| 3569 | Inst.addOperand(Op: MCOperand::createImm(INT32_MIN)); |
| 3570 | else { |
| 3571 | int imm = Val & 0xFF; |
| 3572 | |
| 3573 | if (!(Val & 0x100)) imm *= -1; |
| 3574 | Inst.addOperand(Op: MCOperand::createImm(Val: imm * 4)); |
| 3575 | } |
| 3576 | |
| 3577 | return MCDisassembler::Success; |
| 3578 | } |
| 3579 | |
| 3580 | static DecodeStatus DecodeT2Imm7S4(MCInst &Inst, unsigned Val, uint64_t Address, |
| 3581 | const MCDisassembler *Decoder) { |
| 3582 | if (Val == 0) |
| 3583 | Inst.addOperand(Op: MCOperand::createImm(INT32_MIN)); |
| 3584 | else { |
| 3585 | int imm = Val & 0x7F; |
| 3586 | |
| 3587 | if (!(Val & 0x80)) |
| 3588 | imm *= -1; |
| 3589 | Inst.addOperand(Op: MCOperand::createImm(Val: imm * 4)); |
| 3590 | } |
| 3591 | |
| 3592 | return MCDisassembler::Success; |
| 3593 | } |
| 3594 | |
| 3595 | static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val, |
| 3596 | uint64_t Address, |
| 3597 | const MCDisassembler *Decoder) { |
| 3598 | DecodeStatus S = MCDisassembler::Success; |
| 3599 | |
| 3600 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 9, NumBits: 4); |
| 3601 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 9); |
| 3602 | |
| 3603 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3604 | return MCDisassembler::Fail; |
| 3605 | if (!Check(Out&: S, In: DecodeT2Imm8S4(Inst, Val: imm, Address, Decoder))) |
| 3606 | return MCDisassembler::Fail; |
| 3607 | |
| 3608 | return S; |
| 3609 | } |
| 3610 | |
| 3611 | static DecodeStatus DecodeT2AddrModeImm7s4(MCInst &Inst, unsigned Val, |
| 3612 | uint64_t Address, |
| 3613 | const MCDisassembler *Decoder) { |
| 3614 | DecodeStatus S = MCDisassembler::Success; |
| 3615 | |
| 3616 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 4); |
| 3617 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 8); |
| 3618 | |
| 3619 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3620 | return MCDisassembler::Fail; |
| 3621 | if (!Check(Out&: S, In: DecodeT2Imm7S4(Inst, Val: imm, Address, Decoder))) |
| 3622 | return MCDisassembler::Fail; |
| 3623 | |
| 3624 | return S; |
| 3625 | } |
| 3626 | |
| 3627 | static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst, unsigned Val, |
| 3628 | uint64_t Address, |
| 3629 | const MCDisassembler *Decoder) { |
| 3630 | DecodeStatus S = MCDisassembler::Success; |
| 3631 | |
| 3632 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 4); |
| 3633 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 8); |
| 3634 | |
| 3635 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3636 | return MCDisassembler::Fail; |
| 3637 | |
| 3638 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3639 | |
| 3640 | return S; |
| 3641 | } |
| 3642 | |
| 3643 | template <int shift> |
| 3644 | static DecodeStatus DecodeT2Imm7(MCInst &Inst, unsigned Val, uint64_t Address, |
| 3645 | const MCDisassembler *Decoder) { |
| 3646 | int imm = Val & 0x7F; |
| 3647 | if (Val == 0) |
| 3648 | imm = INT32_MIN; |
| 3649 | else if (!(Val & 0x80)) |
| 3650 | imm *= -1; |
| 3651 | if (imm != INT32_MIN) |
| 3652 | imm *= (1U << shift); |
| 3653 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3654 | |
| 3655 | return MCDisassembler::Success; |
| 3656 | } |
| 3657 | |
| 3658 | template <int shift> |
| 3659 | static DecodeStatus DecodeTAddrModeImm7(MCInst &Inst, unsigned Val, |
| 3660 | uint64_t Address, |
| 3661 | const MCDisassembler *Decoder) { |
| 3662 | DecodeStatus S = MCDisassembler::Success; |
| 3663 | |
| 3664 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 3); |
| 3665 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 8); |
| 3666 | |
| 3667 | if (!Check(Out&: S, In: DecodetGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3668 | return MCDisassembler::Fail; |
| 3669 | if (!Check(S, DecodeT2Imm7<shift>(Inst, imm, Address, Decoder))) |
| 3670 | return MCDisassembler::Fail; |
| 3671 | |
| 3672 | return S; |
| 3673 | } |
| 3674 | |
| 3675 | template <int shift, int WriteBack> |
| 3676 | static DecodeStatus DecodeT2AddrModeImm7(MCInst &Inst, unsigned Val, |
| 3677 | uint64_t Address, |
| 3678 | const MCDisassembler *Decoder) { |
| 3679 | DecodeStatus S = MCDisassembler::Success; |
| 3680 | |
| 3681 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 4); |
| 3682 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 8); |
| 3683 | if (WriteBack) { |
| 3684 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3685 | return MCDisassembler::Fail; |
| 3686 | } else if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3687 | return MCDisassembler::Fail; |
| 3688 | if (!Check(S, DecodeT2Imm7<shift>(Inst, imm, Address, Decoder))) |
| 3689 | return MCDisassembler::Fail; |
| 3690 | |
| 3691 | return S; |
| 3692 | } |
| 3693 | |
| 3694 | static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn, |
| 3695 | uint64_t Address, |
| 3696 | const MCDisassembler *Decoder) { |
| 3697 | DecodeStatus S = MCDisassembler::Success; |
| 3698 | |
| 3699 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 3700 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 3701 | unsigned addr = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 3702 | addr |= fieldFromInstruction(Insn, StartBit: 9, NumBits: 1) << 8; |
| 3703 | addr |= Rn << 9; |
| 3704 | unsigned load = fieldFromInstruction(Insn, StartBit: 20, NumBits: 1); |
| 3705 | |
| 3706 | if (Rn == 15) { |
| 3707 | switch (Inst.getOpcode()) { |
| 3708 | case ARM::t2LDR_PRE: |
| 3709 | case ARM::t2LDR_POST: |
| 3710 | Inst.setOpcode(ARM::t2LDRpci); |
| 3711 | break; |
| 3712 | case ARM::t2LDRB_PRE: |
| 3713 | case ARM::t2LDRB_POST: |
| 3714 | Inst.setOpcode(ARM::t2LDRBpci); |
| 3715 | break; |
| 3716 | case ARM::t2LDRH_PRE: |
| 3717 | case ARM::t2LDRH_POST: |
| 3718 | Inst.setOpcode(ARM::t2LDRHpci); |
| 3719 | break; |
| 3720 | case ARM::t2LDRSB_PRE: |
| 3721 | case ARM::t2LDRSB_POST: |
| 3722 | if (Rt == 15) |
| 3723 | Inst.setOpcode(ARM::t2PLIpci); |
| 3724 | else |
| 3725 | Inst.setOpcode(ARM::t2LDRSBpci); |
| 3726 | break; |
| 3727 | case ARM::t2LDRSH_PRE: |
| 3728 | case ARM::t2LDRSH_POST: |
| 3729 | Inst.setOpcode(ARM::t2LDRSHpci); |
| 3730 | break; |
| 3731 | default: |
| 3732 | return MCDisassembler::Fail; |
| 3733 | } |
| 3734 | return DecodeT2LoadLabel(Inst, Insn, Address, Decoder); |
| 3735 | } |
| 3736 | |
| 3737 | if (!load) { |
| 3738 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3739 | return MCDisassembler::Fail; |
| 3740 | } |
| 3741 | |
| 3742 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 3743 | return MCDisassembler::Fail; |
| 3744 | |
| 3745 | if (load) { |
| 3746 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3747 | return MCDisassembler::Fail; |
| 3748 | } |
| 3749 | |
| 3750 | if (!Check(Out&: S, In: DecodeT2AddrModeImm8(Inst, Val: addr, Address, Decoder))) |
| 3751 | return MCDisassembler::Fail; |
| 3752 | |
| 3753 | DecodePredicateOperand(Inst, Decoder); |
| 3754 | return S; |
| 3755 | } |
| 3756 | |
| 3757 | static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn, |
| 3758 | uint64_t Address, |
| 3759 | const MCDisassembler *Decoder) { |
| 3760 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 7); |
| 3761 | |
| 3762 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::SP)); |
| 3763 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::SP)); |
| 3764 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3765 | |
| 3766 | DecodePredicateOperand(Inst, Decoder); |
| 3767 | return MCDisassembler::Success; |
| 3768 | } |
| 3769 | |
| 3770 | static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn, |
| 3771 | uint64_t Address, |
| 3772 | const MCDisassembler *Decoder) { |
| 3773 | DecodeStatus S = MCDisassembler::Success; |
| 3774 | |
| 3775 | if (Inst.getOpcode() == ARM::tADDrSP) { |
| 3776 | unsigned Rdm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 3); |
| 3777 | Rdm |= fieldFromInstruction(Insn, StartBit: 7, NumBits: 1) << 3; |
| 3778 | |
| 3779 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rdm, Address, Decoder))) |
| 3780 | return MCDisassembler::Fail; |
| 3781 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::SP)); |
| 3782 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rdm, Address, Decoder))) |
| 3783 | return MCDisassembler::Fail; |
| 3784 | } else if (Inst.getOpcode() == ARM::tADDspr) { |
| 3785 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 3, NumBits: 4); |
| 3786 | |
| 3787 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::SP)); |
| 3788 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::SP)); |
| 3789 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 3790 | return MCDisassembler::Fail; |
| 3791 | } |
| 3792 | |
| 3793 | DecodePredicateOperand(Inst, Decoder); |
| 3794 | return S; |
| 3795 | } |
| 3796 | |
| 3797 | static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn, |
| 3798 | uint64_t Address, |
| 3799 | const MCDisassembler *Decoder) { |
| 3800 | unsigned imod = fieldFromInstruction(Insn, StartBit: 4, NumBits: 1) | 0x2; |
| 3801 | unsigned flags = fieldFromInstruction(Insn, StartBit: 0, NumBits: 3); |
| 3802 | |
| 3803 | Inst.addOperand(Op: MCOperand::createImm(Val: imod)); |
| 3804 | Inst.addOperand(Op: MCOperand::createImm(Val: flags)); |
| 3805 | |
| 3806 | return MCDisassembler::Success; |
| 3807 | } |
| 3808 | |
| 3809 | static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn, |
| 3810 | uint64_t Address, |
| 3811 | const MCDisassembler *Decoder) { |
| 3812 | DecodeStatus S = MCDisassembler::Success; |
| 3813 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 3814 | unsigned add = fieldFromInstruction(Insn, StartBit: 4, NumBits: 1); |
| 3815 | |
| 3816 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 3817 | return MCDisassembler::Fail; |
| 3818 | Inst.addOperand(Op: MCOperand::createImm(Val: add)); |
| 3819 | |
| 3820 | return S; |
| 3821 | } |
| 3822 | |
| 3823 | static DecodeStatus DecodeMveAddrModeRQ(MCInst &Inst, unsigned Insn, |
| 3824 | uint64_t Address, |
| 3825 | const MCDisassembler *Decoder) { |
| 3826 | DecodeStatus S = MCDisassembler::Success; |
| 3827 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 3, NumBits: 4); |
| 3828 | unsigned Qm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 3); |
| 3829 | |
| 3830 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3831 | return MCDisassembler::Fail; |
| 3832 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qm, Address, Decoder))) |
| 3833 | return MCDisassembler::Fail; |
| 3834 | |
| 3835 | return S; |
| 3836 | } |
| 3837 | |
| 3838 | template <int shift> |
| 3839 | static DecodeStatus DecodeMveAddrModeQ(MCInst &Inst, unsigned Insn, |
| 3840 | uint64_t Address, |
| 3841 | const MCDisassembler *Decoder) { |
| 3842 | DecodeStatus S = MCDisassembler::Success; |
| 3843 | unsigned Qm = fieldFromInstruction(Insn, StartBit: 8, NumBits: 3); |
| 3844 | int imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 7); |
| 3845 | |
| 3846 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qm, Address, Decoder))) |
| 3847 | return MCDisassembler::Fail; |
| 3848 | |
| 3849 | if(!fieldFromInstruction(Insn, StartBit: 7, NumBits: 1)) { |
| 3850 | if (imm == 0) |
| 3851 | imm = INT32_MIN; // indicate -0 |
| 3852 | else |
| 3853 | imm *= -1; |
| 3854 | } |
| 3855 | if (imm != INT32_MIN) |
| 3856 | imm *= (1U << shift); |
| 3857 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3858 | |
| 3859 | return S; |
| 3860 | } |
| 3861 | |
| 3862 | static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val, |
| 3863 | uint64_t Address, |
| 3864 | const MCDisassembler *Decoder) { |
| 3865 | // Val is passed in as S:J1:J2:imm10H:imm10L:'0' |
| 3866 | // Note only one trailing zero not two. Also the J1 and J2 values are from |
| 3867 | // the encoded instruction. So here change to I1 and I2 values via: |
| 3868 | // I1 = NOT(J1 EOR S); |
| 3869 | // I2 = NOT(J2 EOR S); |
| 3870 | // and build the imm32 with two trailing zeros as documented: |
| 3871 | // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32); |
| 3872 | unsigned S = (Val >> 23) & 1; |
| 3873 | unsigned J1 = (Val >> 22) & 1; |
| 3874 | unsigned J2 = (Val >> 21) & 1; |
| 3875 | unsigned I1 = !(J1 ^ S); |
| 3876 | unsigned I2 = !(J2 ^ S); |
| 3877 | unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21); |
| 3878 | int imm32 = SignExtend32<25>(X: tmp << 1); |
| 3879 | |
| 3880 | if (!tryAddingSymbolicOperand(Address, |
| 3881 | Value: (Address & ~2u) + imm32 + 4, |
| 3882 | isBranch: true, InstSize: 4, MI&: Inst, Decoder)) |
| 3883 | Inst.addOperand(Op: MCOperand::createImm(Val: imm32)); |
| 3884 | return MCDisassembler::Success; |
| 3885 | } |
| 3886 | |
| 3887 | static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val, |
| 3888 | uint64_t Address, |
| 3889 | const MCDisassembler *Decoder) { |
| 3890 | if (Val == 0xA || Val == 0xB) |
| 3891 | return MCDisassembler::Fail; |
| 3892 | |
| 3893 | const FeatureBitset &featureBits = |
| 3894 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 3895 | |
| 3896 | if (!isValidCoprocessorNumber(Num: Val, featureBits)) |
| 3897 | return MCDisassembler::Fail; |
| 3898 | |
| 3899 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 3900 | return MCDisassembler::Success; |
| 3901 | } |
| 3902 | |
| 3903 | static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Insn, |
| 3904 | uint64_t Address, |
| 3905 | const MCDisassembler *Decoder) { |
| 3906 | const FeatureBitset &FeatureBits = |
| 3907 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 3908 | DecodeStatus S = MCDisassembler::Success; |
| 3909 | |
| 3910 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 3911 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 3912 | |
| 3913 | if (Rn == 13 && !FeatureBits[ARM::HasV8Ops]) S = MCDisassembler::SoftFail; |
| 3914 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 3915 | return MCDisassembler::Fail; |
| 3916 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 3917 | return MCDisassembler::Fail; |
| 3918 | DecodePredicateOperand(Inst, Decoder); |
| 3919 | return S; |
| 3920 | } |
| 3921 | |
| 3922 | static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val, |
| 3923 | uint64_t Address, |
| 3924 | const MCDisassembler *Decoder) { |
| 3925 | if (Val & ~0xf) |
| 3926 | return MCDisassembler::Fail; |
| 3927 | |
| 3928 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 3929 | return MCDisassembler::Success; |
| 3930 | } |
| 3931 | |
| 3932 | static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn, |
| 3933 | uint64_t Address, |
| 3934 | const MCDisassembler *Decoder) { |
| 3935 | DecodeStatus S = MCDisassembler::Success; |
| 3936 | |
| 3937 | unsigned pred = fieldFromInstruction(Insn, StartBit: 22, NumBits: 4); |
| 3938 | if (pred == 0xE || pred == 0xF) { |
| 3939 | unsigned opc = fieldFromInstruction(Insn, StartBit: 4, NumBits: 28); |
| 3940 | switch (opc) { |
| 3941 | default: |
| 3942 | return MCDisassembler::Fail; |
| 3943 | case 0xf3bf8f4: |
| 3944 | Inst.setOpcode(ARM::t2DSB); |
| 3945 | break; |
| 3946 | case 0xf3bf8f5: |
| 3947 | Inst.setOpcode(ARM::t2DMB); |
| 3948 | break; |
| 3949 | case 0xf3bf8f6: |
| 3950 | Inst.setOpcode(ARM::t2ISB); |
| 3951 | break; |
| 3952 | } |
| 3953 | |
| 3954 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 3955 | return DecodeMemBarrierOption(Inst, Val: imm, Address, Decoder); |
| 3956 | } |
| 3957 | |
| 3958 | unsigned brtarget = fieldFromInstruction(Insn, StartBit: 0, NumBits: 11) << 1; |
| 3959 | brtarget |= fieldFromInstruction(Insn, StartBit: 11, NumBits: 1) << 19; |
| 3960 | brtarget |= fieldFromInstruction(Insn, StartBit: 13, NumBits: 1) << 18; |
| 3961 | brtarget |= fieldFromInstruction(Insn, StartBit: 16, NumBits: 6) << 12; |
| 3962 | brtarget |= fieldFromInstruction(Insn, StartBit: 26, NumBits: 1) << 20; |
| 3963 | |
| 3964 | if (!Check(Out&: S, In: DecodeT2BROperand(Inst, Val: brtarget, Address, Decoder))) |
| 3965 | return MCDisassembler::Fail; |
| 3966 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 3967 | return MCDisassembler::Fail; |
| 3968 | |
| 3969 | return S; |
| 3970 | } |
| 3971 | |
| 3972 | // Decode a shifted immediate operand. These basically consist |
| 3973 | // of an 8-bit value, and a 4-bit directive that specifies either |
| 3974 | // a splat operation or a rotation. |
| 3975 | static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val, uint64_t Address, |
| 3976 | const MCDisassembler *Decoder) { |
| 3977 | unsigned ctrl = fieldFromInstruction(Insn: Val, StartBit: 10, NumBits: 2); |
| 3978 | if (ctrl == 0) { |
| 3979 | unsigned byte = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 2); |
| 3980 | unsigned imm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 8); |
| 3981 | switch (byte) { |
| 3982 | case 0: |
| 3983 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 3984 | break; |
| 3985 | case 1: |
| 3986 | Inst.addOperand(Op: MCOperand::createImm(Val: (imm << 16) | imm)); |
| 3987 | break; |
| 3988 | case 2: |
| 3989 | Inst.addOperand(Op: MCOperand::createImm(Val: (imm << 24) | (imm << 8))); |
| 3990 | break; |
| 3991 | case 3: |
| 3992 | Inst.addOperand(Op: MCOperand::createImm(Val: (imm << 24) | (imm << 16) | |
| 3993 | (imm << 8) | imm)); |
| 3994 | break; |
| 3995 | } |
| 3996 | } else { |
| 3997 | unsigned unrot = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 7) | 0x80; |
| 3998 | unsigned rot = fieldFromInstruction(Insn: Val, StartBit: 7, NumBits: 5); |
| 3999 | unsigned imm = llvm::rotr<uint32_t>(V: unrot, R: rot); |
| 4000 | Inst.addOperand(Op: MCOperand::createImm(Val: imm)); |
| 4001 | } |
| 4002 | |
| 4003 | return MCDisassembler::Success; |
| 4004 | } |
| 4005 | |
| 4006 | static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val, |
| 4007 | uint64_t Address, |
| 4008 | const MCDisassembler *Decoder) { |
| 4009 | if (!tryAddingSymbolicOperand(Address, Value: Address + SignExtend32<9>(X: Val<<1) + 4, |
| 4010 | isBranch: true, InstSize: 2, MI&: Inst, Decoder)) |
| 4011 | Inst.addOperand(Op: MCOperand::createImm(Val: SignExtend32<9>(X: Val << 1))); |
| 4012 | return MCDisassembler::Success; |
| 4013 | } |
| 4014 | |
| 4015 | static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val, |
| 4016 | uint64_t Address, |
| 4017 | const MCDisassembler *Decoder) { |
| 4018 | // Val is passed in as S:J1:J2:imm10:imm11 |
| 4019 | // Note no trailing zero after imm11. Also the J1 and J2 values are from |
| 4020 | // the encoded instruction. So here change to I1 and I2 values via: |
| 4021 | // I1 = NOT(J1 EOR S); |
| 4022 | // I2 = NOT(J2 EOR S); |
| 4023 | // and build the imm32 with one trailing zero as documented: |
| 4024 | // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32); |
| 4025 | unsigned S = (Val >> 23) & 1; |
| 4026 | unsigned J1 = (Val >> 22) & 1; |
| 4027 | unsigned J2 = (Val >> 21) & 1; |
| 4028 | unsigned I1 = !(J1 ^ S); |
| 4029 | unsigned I2 = !(J2 ^ S); |
| 4030 | unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21); |
| 4031 | int imm32 = SignExtend32<25>(X: tmp << 1); |
| 4032 | |
| 4033 | if (!tryAddingSymbolicOperand(Address, Value: Address + imm32 + 4, |
| 4034 | isBranch: true, InstSize: 4, MI&: Inst, Decoder)) |
| 4035 | Inst.addOperand(Op: MCOperand::createImm(Val: imm32)); |
| 4036 | return MCDisassembler::Success; |
| 4037 | } |
| 4038 | |
| 4039 | static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val, |
| 4040 | uint64_t Address, |
| 4041 | const MCDisassembler *Decoder) { |
| 4042 | if (Val & ~0xf) |
| 4043 | return MCDisassembler::Fail; |
| 4044 | |
| 4045 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 4046 | return MCDisassembler::Success; |
| 4047 | } |
| 4048 | |
| 4049 | static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val, uint64_t Address, |
| 4050 | const MCDisassembler *Decoder) { |
| 4051 | DecodeStatus S = MCDisassembler::Success; |
| 4052 | const FeatureBitset &FeatureBits = |
| 4053 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 4054 | |
| 4055 | if (FeatureBits[ARM::FeatureMClass]) { |
| 4056 | unsigned ValLow = Val & 0xff; |
| 4057 | |
| 4058 | // Validate the SYSm value first. |
| 4059 | switch (ValLow) { |
| 4060 | case 0: // apsr |
| 4061 | case 1: // iapsr |
| 4062 | case 2: // eapsr |
| 4063 | case 3: // xpsr |
| 4064 | case 5: // ipsr |
| 4065 | case 6: // epsr |
| 4066 | case 7: // iepsr |
| 4067 | case 8: // msp |
| 4068 | case 9: // psp |
| 4069 | case 16: // primask |
| 4070 | case 20: // control |
| 4071 | break; |
| 4072 | case 17: // basepri |
| 4073 | case 18: // basepri_max |
| 4074 | case 19: // faultmask |
| 4075 | if (!(FeatureBits[ARM::HasV7Ops])) |
| 4076 | // Values basepri, basepri_max and faultmask are only valid for v7m. |
| 4077 | return MCDisassembler::Fail; |
| 4078 | break; |
| 4079 | case 0x8a: // msplim_ns |
| 4080 | case 0x8b: // psplim_ns |
| 4081 | case 0x91: // basepri_ns |
| 4082 | case 0x93: // faultmask_ns |
| 4083 | if (!(FeatureBits[ARM::HasV8MMainlineOps])) |
| 4084 | return MCDisassembler::Fail; |
| 4085 | [[fallthrough]]; |
| 4086 | case 10: // msplim |
| 4087 | case 11: // psplim |
| 4088 | case 0x88: // msp_ns |
| 4089 | case 0x89: // psp_ns |
| 4090 | case 0x90: // primask_ns |
| 4091 | case 0x94: // control_ns |
| 4092 | case 0x98: // sp_ns |
| 4093 | if (!(FeatureBits[ARM::Feature8MSecExt])) |
| 4094 | return MCDisassembler::Fail; |
| 4095 | break; |
| 4096 | case 0x20: // pac_key_p_0 |
| 4097 | case 0x21: // pac_key_p_1 |
| 4098 | case 0x22: // pac_key_p_2 |
| 4099 | case 0x23: // pac_key_p_3 |
| 4100 | case 0x24: // pac_key_u_0 |
| 4101 | case 0x25: // pac_key_u_1 |
| 4102 | case 0x26: // pac_key_u_2 |
| 4103 | case 0x27: // pac_key_u_3 |
| 4104 | case 0xa0: // pac_key_p_0_ns |
| 4105 | case 0xa1: // pac_key_p_1_ns |
| 4106 | case 0xa2: // pac_key_p_2_ns |
| 4107 | case 0xa3: // pac_key_p_3_ns |
| 4108 | case 0xa4: // pac_key_u_0_ns |
| 4109 | case 0xa5: // pac_key_u_1_ns |
| 4110 | case 0xa6: // pac_key_u_2_ns |
| 4111 | case 0xa7: // pac_key_u_3_ns |
| 4112 | if (!(FeatureBits[ARM::FeaturePACBTI])) |
| 4113 | return MCDisassembler::Fail; |
| 4114 | break; |
| 4115 | default: |
| 4116 | // Architecturally defined as unpredictable |
| 4117 | S = MCDisassembler::SoftFail; |
| 4118 | break; |
| 4119 | } |
| 4120 | |
| 4121 | if (Inst.getOpcode() == ARM::t2MSR_M) { |
| 4122 | unsigned Mask = fieldFromInstruction(Insn: Val, StartBit: 10, NumBits: 2); |
| 4123 | if (!(FeatureBits[ARM::HasV7Ops])) { |
| 4124 | // The ARMv6-M MSR bits {11-10} can be only 0b10, other values are |
| 4125 | // unpredictable. |
| 4126 | if (Mask != 2) |
| 4127 | S = MCDisassembler::SoftFail; |
| 4128 | } |
| 4129 | else { |
| 4130 | // The ARMv7-M architecture stores an additional 2-bit mask value in |
| 4131 | // MSR bits {11-10}. The mask is used only with apsr, iapsr, eapsr and |
| 4132 | // xpsr, it has to be 0b10 in other cases. Bit mask{1} indicates if |
| 4133 | // the NZCVQ bits should be moved by the instruction. Bit mask{0} |
| 4134 | // indicates the move for the GE{3:0} bits, the mask{0} bit can be set |
| 4135 | // only if the processor includes the DSP extension. |
| 4136 | if (Mask == 0 || (Mask != 2 && ValLow > 3) || |
| 4137 | (!(FeatureBits[ARM::FeatureDSP]) && (Mask & 1))) |
| 4138 | S = MCDisassembler::SoftFail; |
| 4139 | } |
| 4140 | } |
| 4141 | } else { |
| 4142 | // A/R class |
| 4143 | if (Val == 0) |
| 4144 | return MCDisassembler::Fail; |
| 4145 | } |
| 4146 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 4147 | return S; |
| 4148 | } |
| 4149 | |
| 4150 | static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Val, |
| 4151 | uint64_t Address, |
| 4152 | const MCDisassembler *Decoder) { |
| 4153 | unsigned R = fieldFromInstruction(Insn: Val, StartBit: 5, NumBits: 1); |
| 4154 | unsigned SysM = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 5); |
| 4155 | |
| 4156 | // The table of encodings for these banked registers comes from B9.2.3 of the |
| 4157 | // ARM ARM. There are patterns, but nothing regular enough to make this logic |
| 4158 | // neater. So by fiat, these values are UNPREDICTABLE: |
| 4159 | if (!ARMBankedReg::lookupBankedRegByEncoding(Encoding: (R << 5) | SysM)) |
| 4160 | return MCDisassembler::Fail; |
| 4161 | |
| 4162 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 4163 | return MCDisassembler::Success; |
| 4164 | } |
| 4165 | |
| 4166 | static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn, |
| 4167 | uint64_t Address, |
| 4168 | const MCDisassembler *Decoder) { |
| 4169 | DecodeStatus S = MCDisassembler::Success; |
| 4170 | |
| 4171 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4172 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4173 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 4174 | |
| 4175 | if (Rn == 0xF) |
| 4176 | S = MCDisassembler::SoftFail; |
| 4177 | |
| 4178 | if (!Check(Out&: S, In: DecodeGPRPairRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 4179 | return MCDisassembler::Fail; |
| 4180 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4181 | return MCDisassembler::Fail; |
| 4182 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 4183 | return MCDisassembler::Fail; |
| 4184 | |
| 4185 | return S; |
| 4186 | } |
| 4187 | |
| 4188 | static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn, |
| 4189 | uint64_t Address, |
| 4190 | const MCDisassembler *Decoder) { |
| 4191 | DecodeStatus S = MCDisassembler::Success; |
| 4192 | |
| 4193 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4194 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4195 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4196 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 4197 | |
| 4198 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4199 | return MCDisassembler::Fail; |
| 4200 | |
| 4201 | if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1) |
| 4202 | S = MCDisassembler::SoftFail; |
| 4203 | |
| 4204 | if (!Check(Out&: S, In: DecodeGPRPairRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 4205 | return MCDisassembler::Fail; |
| 4206 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4207 | return MCDisassembler::Fail; |
| 4208 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 4209 | return MCDisassembler::Fail; |
| 4210 | |
| 4211 | return S; |
| 4212 | } |
| 4213 | |
| 4214 | static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn, |
| 4215 | uint64_t Address, |
| 4216 | const MCDisassembler *Decoder) { |
| 4217 | DecodeStatus S = MCDisassembler::Success; |
| 4218 | |
| 4219 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4220 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4221 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 12); |
| 4222 | imm |= fieldFromInstruction(Insn, StartBit: 16, NumBits: 4) << 13; |
| 4223 | imm |= fieldFromInstruction(Insn, StartBit: 23, NumBits: 1) << 12; |
| 4224 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 4225 | |
| 4226 | if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; |
| 4227 | |
| 4228 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 4229 | return MCDisassembler::Fail; |
| 4230 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4231 | return MCDisassembler::Fail; |
| 4232 | if (!Check(Out&: S, In: DecodeAddrModeImm12Operand(Inst, Val: imm, Address, Decoder))) |
| 4233 | return MCDisassembler::Fail; |
| 4234 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 4235 | return MCDisassembler::Fail; |
| 4236 | |
| 4237 | return S; |
| 4238 | } |
| 4239 | |
| 4240 | static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn, |
| 4241 | uint64_t Address, |
| 4242 | const MCDisassembler *Decoder) { |
| 4243 | DecodeStatus S = MCDisassembler::Success; |
| 4244 | |
| 4245 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4246 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4247 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 12); |
| 4248 | imm |= fieldFromInstruction(Insn, StartBit: 16, NumBits: 4) << 13; |
| 4249 | imm |= fieldFromInstruction(Insn, StartBit: 23, NumBits: 1) << 12; |
| 4250 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 4251 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4252 | |
| 4253 | if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; |
| 4254 | if (Rm == 0xF) S = MCDisassembler::SoftFail; |
| 4255 | |
| 4256 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 4257 | return MCDisassembler::Fail; |
| 4258 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4259 | return MCDisassembler::Fail; |
| 4260 | if (!Check(Out&: S, In: DecodeSORegMemOperand(Inst, Val: imm, Address, Decoder))) |
| 4261 | return MCDisassembler::Fail; |
| 4262 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 4263 | return MCDisassembler::Fail; |
| 4264 | |
| 4265 | return S; |
| 4266 | } |
| 4267 | |
| 4268 | static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn, |
| 4269 | uint64_t Address, |
| 4270 | const MCDisassembler *Decoder) { |
| 4271 | DecodeStatus S = MCDisassembler::Success; |
| 4272 | |
| 4273 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4274 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4275 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 12); |
| 4276 | imm |= fieldFromInstruction(Insn, StartBit: 16, NumBits: 4) << 13; |
| 4277 | imm |= fieldFromInstruction(Insn, StartBit: 23, NumBits: 1) << 12; |
| 4278 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 4279 | |
| 4280 | if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; |
| 4281 | |
| 4282 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4283 | return MCDisassembler::Fail; |
| 4284 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 4285 | return MCDisassembler::Fail; |
| 4286 | if (!Check(Out&: S, In: DecodeAddrModeImm12Operand(Inst, Val: imm, Address, Decoder))) |
| 4287 | return MCDisassembler::Fail; |
| 4288 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 4289 | return MCDisassembler::Fail; |
| 4290 | |
| 4291 | return S; |
| 4292 | } |
| 4293 | |
| 4294 | static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn, |
| 4295 | uint64_t Address, |
| 4296 | const MCDisassembler *Decoder) { |
| 4297 | DecodeStatus S = MCDisassembler::Success; |
| 4298 | |
| 4299 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4300 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4301 | unsigned imm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 12); |
| 4302 | imm |= fieldFromInstruction(Insn, StartBit: 16, NumBits: 4) << 13; |
| 4303 | imm |= fieldFromInstruction(Insn, StartBit: 23, NumBits: 1) << 12; |
| 4304 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 4305 | |
| 4306 | if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; |
| 4307 | |
| 4308 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4309 | return MCDisassembler::Fail; |
| 4310 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 4311 | return MCDisassembler::Fail; |
| 4312 | if (!Check(Out&: S, In: DecodeSORegMemOperand(Inst, Val: imm, Address, Decoder))) |
| 4313 | return MCDisassembler::Fail; |
| 4314 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 4315 | return MCDisassembler::Fail; |
| 4316 | |
| 4317 | return S; |
| 4318 | } |
| 4319 | |
| 4320 | static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4321 | const MCDisassembler *Decoder) { |
| 4322 | DecodeStatus S = MCDisassembler::Success; |
| 4323 | |
| 4324 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4325 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4326 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4327 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 4328 | unsigned size = fieldFromInstruction(Insn, StartBit: 10, NumBits: 2); |
| 4329 | |
| 4330 | unsigned align = 0; |
| 4331 | unsigned index = 0; |
| 4332 | switch (size) { |
| 4333 | default: |
| 4334 | return MCDisassembler::Fail; |
| 4335 | case 0: |
| 4336 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4337 | return MCDisassembler::Fail; // UNDEFINED |
| 4338 | index = fieldFromInstruction(Insn, StartBit: 5, NumBits: 3); |
| 4339 | break; |
| 4340 | case 1: |
| 4341 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4342 | return MCDisassembler::Fail; // UNDEFINED |
| 4343 | index = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 4344 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4345 | align = 2; |
| 4346 | break; |
| 4347 | case 2: |
| 4348 | if (fieldFromInstruction(Insn, StartBit: 6, NumBits: 1)) |
| 4349 | return MCDisassembler::Fail; // UNDEFINED |
| 4350 | index = fieldFromInstruction(Insn, StartBit: 7, NumBits: 1); |
| 4351 | |
| 4352 | switch (fieldFromInstruction(Insn, StartBit: 4, NumBits: 2)) { |
| 4353 | case 0 : |
| 4354 | align = 0; break; |
| 4355 | case 3: |
| 4356 | align = 4; break; |
| 4357 | default: |
| 4358 | return MCDisassembler::Fail; |
| 4359 | } |
| 4360 | break; |
| 4361 | } |
| 4362 | |
| 4363 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4364 | return MCDisassembler::Fail; |
| 4365 | if (Rm != 0xF) { // Writeback |
| 4366 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4367 | return MCDisassembler::Fail; |
| 4368 | } |
| 4369 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4370 | return MCDisassembler::Fail; |
| 4371 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 4372 | if (Rm != 0xF) { |
| 4373 | if (Rm != 0xD) { |
| 4374 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 4375 | return MCDisassembler::Fail; |
| 4376 | } else |
| 4377 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 4378 | } |
| 4379 | |
| 4380 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4381 | return MCDisassembler::Fail; |
| 4382 | Inst.addOperand(Op: MCOperand::createImm(Val: index)); |
| 4383 | |
| 4384 | DecodePredicateOperand(Inst, Decoder); |
| 4385 | return S; |
| 4386 | } |
| 4387 | |
| 4388 | static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4389 | const MCDisassembler *Decoder) { |
| 4390 | DecodeStatus S = MCDisassembler::Success; |
| 4391 | |
| 4392 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4393 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4394 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4395 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 4396 | unsigned size = fieldFromInstruction(Insn, StartBit: 10, NumBits: 2); |
| 4397 | |
| 4398 | unsigned align = 0; |
| 4399 | unsigned index = 0; |
| 4400 | switch (size) { |
| 4401 | default: |
| 4402 | return MCDisassembler::Fail; |
| 4403 | case 0: |
| 4404 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4405 | return MCDisassembler::Fail; // UNDEFINED |
| 4406 | index = fieldFromInstruction(Insn, StartBit: 5, NumBits: 3); |
| 4407 | break; |
| 4408 | case 1: |
| 4409 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4410 | return MCDisassembler::Fail; // UNDEFINED |
| 4411 | index = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 4412 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4413 | align = 2; |
| 4414 | break; |
| 4415 | case 2: |
| 4416 | if (fieldFromInstruction(Insn, StartBit: 6, NumBits: 1)) |
| 4417 | return MCDisassembler::Fail; // UNDEFINED |
| 4418 | index = fieldFromInstruction(Insn, StartBit: 7, NumBits: 1); |
| 4419 | |
| 4420 | switch (fieldFromInstruction(Insn, StartBit: 4, NumBits: 2)) { |
| 4421 | case 0: |
| 4422 | align = 0; break; |
| 4423 | case 3: |
| 4424 | align = 4; break; |
| 4425 | default: |
| 4426 | return MCDisassembler::Fail; |
| 4427 | } |
| 4428 | break; |
| 4429 | } |
| 4430 | |
| 4431 | if (Rm != 0xF) { // Writeback |
| 4432 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4433 | return MCDisassembler::Fail; |
| 4434 | } |
| 4435 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4436 | return MCDisassembler::Fail; |
| 4437 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 4438 | if (Rm != 0xF) { |
| 4439 | if (Rm != 0xD) { |
| 4440 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 4441 | return MCDisassembler::Fail; |
| 4442 | } else |
| 4443 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 4444 | } |
| 4445 | |
| 4446 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4447 | return MCDisassembler::Fail; |
| 4448 | Inst.addOperand(Op: MCOperand::createImm(Val: index)); |
| 4449 | |
| 4450 | DecodePredicateOperand(Inst, Decoder); |
| 4451 | return S; |
| 4452 | } |
| 4453 | |
| 4454 | static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4455 | const MCDisassembler *Decoder) { |
| 4456 | DecodeStatus S = MCDisassembler::Success; |
| 4457 | |
| 4458 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4459 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4460 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4461 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 4462 | unsigned size = fieldFromInstruction(Insn, StartBit: 10, NumBits: 2); |
| 4463 | |
| 4464 | unsigned align = 0; |
| 4465 | unsigned index = 0; |
| 4466 | unsigned inc = 1; |
| 4467 | switch (size) { |
| 4468 | default: |
| 4469 | return MCDisassembler::Fail; |
| 4470 | case 0: |
| 4471 | index = fieldFromInstruction(Insn, StartBit: 5, NumBits: 3); |
| 4472 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4473 | align = 2; |
| 4474 | break; |
| 4475 | case 1: |
| 4476 | index = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 4477 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4478 | align = 4; |
| 4479 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4480 | inc = 2; |
| 4481 | break; |
| 4482 | case 2: |
| 4483 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4484 | return MCDisassembler::Fail; // UNDEFINED |
| 4485 | index = fieldFromInstruction(Insn, StartBit: 7, NumBits: 1); |
| 4486 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1) != 0) |
| 4487 | align = 8; |
| 4488 | if (fieldFromInstruction(Insn, StartBit: 6, NumBits: 1)) |
| 4489 | inc = 2; |
| 4490 | break; |
| 4491 | } |
| 4492 | |
| 4493 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4494 | return MCDisassembler::Fail; |
| 4495 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+inc, Address, Decoder))) |
| 4496 | return MCDisassembler::Fail; |
| 4497 | if (Rm != 0xF) { // Writeback |
| 4498 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4499 | return MCDisassembler::Fail; |
| 4500 | } |
| 4501 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4502 | return MCDisassembler::Fail; |
| 4503 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 4504 | if (Rm != 0xF) { |
| 4505 | if (Rm != 0xD) { |
| 4506 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 4507 | return MCDisassembler::Fail; |
| 4508 | } else |
| 4509 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 4510 | } |
| 4511 | |
| 4512 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4513 | return MCDisassembler::Fail; |
| 4514 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+inc, Address, Decoder))) |
| 4515 | return MCDisassembler::Fail; |
| 4516 | Inst.addOperand(Op: MCOperand::createImm(Val: index)); |
| 4517 | |
| 4518 | DecodePredicateOperand(Inst, Decoder); |
| 4519 | return S; |
| 4520 | } |
| 4521 | |
| 4522 | static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4523 | const MCDisassembler *Decoder) { |
| 4524 | DecodeStatus S = MCDisassembler::Success; |
| 4525 | |
| 4526 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4527 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4528 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4529 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 4530 | unsigned size = fieldFromInstruction(Insn, StartBit: 10, NumBits: 2); |
| 4531 | |
| 4532 | unsigned align = 0; |
| 4533 | unsigned index = 0; |
| 4534 | unsigned inc = 1; |
| 4535 | switch (size) { |
| 4536 | default: |
| 4537 | return MCDisassembler::Fail; |
| 4538 | case 0: |
| 4539 | index = fieldFromInstruction(Insn, StartBit: 5, NumBits: 3); |
| 4540 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4541 | align = 2; |
| 4542 | break; |
| 4543 | case 1: |
| 4544 | index = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 4545 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4546 | align = 4; |
| 4547 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4548 | inc = 2; |
| 4549 | break; |
| 4550 | case 2: |
| 4551 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4552 | return MCDisassembler::Fail; // UNDEFINED |
| 4553 | index = fieldFromInstruction(Insn, StartBit: 7, NumBits: 1); |
| 4554 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1) != 0) |
| 4555 | align = 8; |
| 4556 | if (fieldFromInstruction(Insn, StartBit: 6, NumBits: 1)) |
| 4557 | inc = 2; |
| 4558 | break; |
| 4559 | } |
| 4560 | |
| 4561 | if (Rm != 0xF) { // Writeback |
| 4562 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4563 | return MCDisassembler::Fail; |
| 4564 | } |
| 4565 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4566 | return MCDisassembler::Fail; |
| 4567 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 4568 | if (Rm != 0xF) { |
| 4569 | if (Rm != 0xD) { |
| 4570 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 4571 | return MCDisassembler::Fail; |
| 4572 | } else |
| 4573 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 4574 | } |
| 4575 | |
| 4576 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4577 | return MCDisassembler::Fail; |
| 4578 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+inc, Address, Decoder))) |
| 4579 | return MCDisassembler::Fail; |
| 4580 | Inst.addOperand(Op: MCOperand::createImm(Val: index)); |
| 4581 | |
| 4582 | DecodePredicateOperand(Inst, Decoder); |
| 4583 | return S; |
| 4584 | } |
| 4585 | |
| 4586 | static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4587 | const MCDisassembler *Decoder) { |
| 4588 | DecodeStatus S = MCDisassembler::Success; |
| 4589 | |
| 4590 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4591 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4592 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4593 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 4594 | unsigned size = fieldFromInstruction(Insn, StartBit: 10, NumBits: 2); |
| 4595 | |
| 4596 | unsigned align = 0; |
| 4597 | unsigned index = 0; |
| 4598 | unsigned inc = 1; |
| 4599 | switch (size) { |
| 4600 | default: |
| 4601 | return MCDisassembler::Fail; |
| 4602 | case 0: |
| 4603 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4604 | return MCDisassembler::Fail; // UNDEFINED |
| 4605 | index = fieldFromInstruction(Insn, StartBit: 5, NumBits: 3); |
| 4606 | break; |
| 4607 | case 1: |
| 4608 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4609 | return MCDisassembler::Fail; // UNDEFINED |
| 4610 | index = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 4611 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4612 | inc = 2; |
| 4613 | break; |
| 4614 | case 2: |
| 4615 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 2)) |
| 4616 | return MCDisassembler::Fail; // UNDEFINED |
| 4617 | index = fieldFromInstruction(Insn, StartBit: 7, NumBits: 1); |
| 4618 | if (fieldFromInstruction(Insn, StartBit: 6, NumBits: 1)) |
| 4619 | inc = 2; |
| 4620 | break; |
| 4621 | } |
| 4622 | |
| 4623 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4624 | return MCDisassembler::Fail; |
| 4625 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+inc, Address, Decoder))) |
| 4626 | return MCDisassembler::Fail; |
| 4627 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+2*inc, Address, Decoder))) |
| 4628 | return MCDisassembler::Fail; |
| 4629 | |
| 4630 | if (Rm != 0xF) { // Writeback |
| 4631 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4632 | return MCDisassembler::Fail; |
| 4633 | } |
| 4634 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4635 | return MCDisassembler::Fail; |
| 4636 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 4637 | if (Rm != 0xF) { |
| 4638 | if (Rm != 0xD) { |
| 4639 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 4640 | return MCDisassembler::Fail; |
| 4641 | } else |
| 4642 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 4643 | } |
| 4644 | |
| 4645 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4646 | return MCDisassembler::Fail; |
| 4647 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+inc, Address, Decoder))) |
| 4648 | return MCDisassembler::Fail; |
| 4649 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+2*inc, Address, Decoder))) |
| 4650 | return MCDisassembler::Fail; |
| 4651 | Inst.addOperand(Op: MCOperand::createImm(Val: index)); |
| 4652 | |
| 4653 | DecodePredicateOperand(Inst, Decoder); |
| 4654 | return S; |
| 4655 | } |
| 4656 | |
| 4657 | static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4658 | const MCDisassembler *Decoder) { |
| 4659 | DecodeStatus S = MCDisassembler::Success; |
| 4660 | |
| 4661 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4662 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4663 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4664 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 4665 | unsigned size = fieldFromInstruction(Insn, StartBit: 10, NumBits: 2); |
| 4666 | |
| 4667 | unsigned align = 0; |
| 4668 | unsigned index = 0; |
| 4669 | unsigned inc = 1; |
| 4670 | switch (size) { |
| 4671 | default: |
| 4672 | return MCDisassembler::Fail; |
| 4673 | case 0: |
| 4674 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4675 | return MCDisassembler::Fail; // UNDEFINED |
| 4676 | index = fieldFromInstruction(Insn, StartBit: 5, NumBits: 3); |
| 4677 | break; |
| 4678 | case 1: |
| 4679 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4680 | return MCDisassembler::Fail; // UNDEFINED |
| 4681 | index = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 4682 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4683 | inc = 2; |
| 4684 | break; |
| 4685 | case 2: |
| 4686 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 2)) |
| 4687 | return MCDisassembler::Fail; // UNDEFINED |
| 4688 | index = fieldFromInstruction(Insn, StartBit: 7, NumBits: 1); |
| 4689 | if (fieldFromInstruction(Insn, StartBit: 6, NumBits: 1)) |
| 4690 | inc = 2; |
| 4691 | break; |
| 4692 | } |
| 4693 | |
| 4694 | if (Rm != 0xF) { // Writeback |
| 4695 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4696 | return MCDisassembler::Fail; |
| 4697 | } |
| 4698 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4699 | return MCDisassembler::Fail; |
| 4700 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 4701 | if (Rm != 0xF) { |
| 4702 | if (Rm != 0xD) { |
| 4703 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 4704 | return MCDisassembler::Fail; |
| 4705 | } else |
| 4706 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 4707 | } |
| 4708 | |
| 4709 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4710 | return MCDisassembler::Fail; |
| 4711 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+inc, Address, Decoder))) |
| 4712 | return MCDisassembler::Fail; |
| 4713 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+2*inc, Address, Decoder))) |
| 4714 | return MCDisassembler::Fail; |
| 4715 | Inst.addOperand(Op: MCOperand::createImm(Val: index)); |
| 4716 | |
| 4717 | DecodePredicateOperand(Inst, Decoder); |
| 4718 | return S; |
| 4719 | } |
| 4720 | |
| 4721 | static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4722 | const MCDisassembler *Decoder) { |
| 4723 | DecodeStatus S = MCDisassembler::Success; |
| 4724 | |
| 4725 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4726 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4727 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4728 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 4729 | unsigned size = fieldFromInstruction(Insn, StartBit: 10, NumBits: 2); |
| 4730 | |
| 4731 | unsigned align = 0; |
| 4732 | unsigned index = 0; |
| 4733 | unsigned inc = 1; |
| 4734 | switch (size) { |
| 4735 | default: |
| 4736 | return MCDisassembler::Fail; |
| 4737 | case 0: |
| 4738 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4739 | align = 4; |
| 4740 | index = fieldFromInstruction(Insn, StartBit: 5, NumBits: 3); |
| 4741 | break; |
| 4742 | case 1: |
| 4743 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4744 | align = 8; |
| 4745 | index = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 4746 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4747 | inc = 2; |
| 4748 | break; |
| 4749 | case 2: |
| 4750 | switch (fieldFromInstruction(Insn, StartBit: 4, NumBits: 2)) { |
| 4751 | case 0: |
| 4752 | align = 0; break; |
| 4753 | case 3: |
| 4754 | return MCDisassembler::Fail; |
| 4755 | default: |
| 4756 | align = 4 << fieldFromInstruction(Insn, StartBit: 4, NumBits: 2); break; |
| 4757 | } |
| 4758 | |
| 4759 | index = fieldFromInstruction(Insn, StartBit: 7, NumBits: 1); |
| 4760 | if (fieldFromInstruction(Insn, StartBit: 6, NumBits: 1)) |
| 4761 | inc = 2; |
| 4762 | break; |
| 4763 | } |
| 4764 | |
| 4765 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4766 | return MCDisassembler::Fail; |
| 4767 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+inc, Address, Decoder))) |
| 4768 | return MCDisassembler::Fail; |
| 4769 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+2*inc, Address, Decoder))) |
| 4770 | return MCDisassembler::Fail; |
| 4771 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+3*inc, Address, Decoder))) |
| 4772 | return MCDisassembler::Fail; |
| 4773 | |
| 4774 | if (Rm != 0xF) { // Writeback |
| 4775 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4776 | return MCDisassembler::Fail; |
| 4777 | } |
| 4778 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4779 | return MCDisassembler::Fail; |
| 4780 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 4781 | if (Rm != 0xF) { |
| 4782 | if (Rm != 0xD) { |
| 4783 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 4784 | return MCDisassembler::Fail; |
| 4785 | } else |
| 4786 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 4787 | } |
| 4788 | |
| 4789 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4790 | return MCDisassembler::Fail; |
| 4791 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+inc, Address, Decoder))) |
| 4792 | return MCDisassembler::Fail; |
| 4793 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+2*inc, Address, Decoder))) |
| 4794 | return MCDisassembler::Fail; |
| 4795 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+3*inc, Address, Decoder))) |
| 4796 | return MCDisassembler::Fail; |
| 4797 | Inst.addOperand(Op: MCOperand::createImm(Val: index)); |
| 4798 | |
| 4799 | DecodePredicateOperand(Inst, Decoder); |
| 4800 | return S; |
| 4801 | } |
| 4802 | |
| 4803 | static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4804 | const MCDisassembler *Decoder) { |
| 4805 | DecodeStatus S = MCDisassembler::Success; |
| 4806 | |
| 4807 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4808 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4809 | unsigned Rd = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4810 | Rd |= fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4; |
| 4811 | unsigned size = fieldFromInstruction(Insn, StartBit: 10, NumBits: 2); |
| 4812 | |
| 4813 | unsigned align = 0; |
| 4814 | unsigned index = 0; |
| 4815 | unsigned inc = 1; |
| 4816 | switch (size) { |
| 4817 | default: |
| 4818 | return MCDisassembler::Fail; |
| 4819 | case 0: |
| 4820 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4821 | align = 4; |
| 4822 | index = fieldFromInstruction(Insn, StartBit: 5, NumBits: 3); |
| 4823 | break; |
| 4824 | case 1: |
| 4825 | if (fieldFromInstruction(Insn, StartBit: 4, NumBits: 1)) |
| 4826 | align = 8; |
| 4827 | index = fieldFromInstruction(Insn, StartBit: 6, NumBits: 2); |
| 4828 | if (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1)) |
| 4829 | inc = 2; |
| 4830 | break; |
| 4831 | case 2: |
| 4832 | switch (fieldFromInstruction(Insn, StartBit: 4, NumBits: 2)) { |
| 4833 | case 0: |
| 4834 | align = 0; break; |
| 4835 | case 3: |
| 4836 | return MCDisassembler::Fail; |
| 4837 | default: |
| 4838 | align = 4 << fieldFromInstruction(Insn, StartBit: 4, NumBits: 2); break; |
| 4839 | } |
| 4840 | |
| 4841 | index = fieldFromInstruction(Insn, StartBit: 7, NumBits: 1); |
| 4842 | if (fieldFromInstruction(Insn, StartBit: 6, NumBits: 1)) |
| 4843 | inc = 2; |
| 4844 | break; |
| 4845 | } |
| 4846 | |
| 4847 | if (Rm != 0xF) { // Writeback |
| 4848 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4849 | return MCDisassembler::Fail; |
| 4850 | } |
| 4851 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4852 | return MCDisassembler::Fail; |
| 4853 | Inst.addOperand(Op: MCOperand::createImm(Val: align)); |
| 4854 | if (Rm != 0xF) { |
| 4855 | if (Rm != 0xD) { |
| 4856 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 4857 | return MCDisassembler::Fail; |
| 4858 | } else |
| 4859 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 4860 | } |
| 4861 | |
| 4862 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd, Address, Decoder))) |
| 4863 | return MCDisassembler::Fail; |
| 4864 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+inc, Address, Decoder))) |
| 4865 | return MCDisassembler::Fail; |
| 4866 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+2*inc, Address, Decoder))) |
| 4867 | return MCDisassembler::Fail; |
| 4868 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Rd+3*inc, Address, Decoder))) |
| 4869 | return MCDisassembler::Fail; |
| 4870 | Inst.addOperand(Op: MCOperand::createImm(Val: index)); |
| 4871 | |
| 4872 | DecodePredicateOperand(Inst, Decoder); |
| 4873 | return S; |
| 4874 | } |
| 4875 | |
| 4876 | static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4877 | const MCDisassembler *Decoder) { |
| 4878 | DecodeStatus S = MCDisassembler::Success; |
| 4879 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4880 | unsigned Rt2 = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4881 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 5, NumBits: 1); |
| 4882 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 4883 | Rm |= fieldFromInstruction(Insn, StartBit: 0, NumBits: 4) << 1; |
| 4884 | |
| 4885 | if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F) |
| 4886 | S = MCDisassembler::SoftFail; |
| 4887 | |
| 4888 | if (!Check(Out&: S, In: DecodeSPRRegisterClass(Inst, RegNo: Rm , Address, Decoder))) |
| 4889 | return MCDisassembler::Fail; |
| 4890 | if (!Check(Out&: S, In: DecodeSPRRegisterClass(Inst, RegNo: Rm+1, Address, Decoder))) |
| 4891 | return MCDisassembler::Fail; |
| 4892 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt , Address, Decoder))) |
| 4893 | return MCDisassembler::Fail; |
| 4894 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt2 , Address, Decoder))) |
| 4895 | return MCDisassembler::Fail; |
| 4896 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 4897 | return MCDisassembler::Fail; |
| 4898 | |
| 4899 | return S; |
| 4900 | } |
| 4901 | |
| 4902 | static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4903 | const MCDisassembler *Decoder) { |
| 4904 | DecodeStatus S = MCDisassembler::Success; |
| 4905 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4906 | unsigned Rt2 = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4907 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 5, NumBits: 1); |
| 4908 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 4909 | Rm |= fieldFromInstruction(Insn, StartBit: 0, NumBits: 4) << 1; |
| 4910 | |
| 4911 | if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F) |
| 4912 | S = MCDisassembler::SoftFail; |
| 4913 | |
| 4914 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt , Address, Decoder))) |
| 4915 | return MCDisassembler::Fail; |
| 4916 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt2 , Address, Decoder))) |
| 4917 | return MCDisassembler::Fail; |
| 4918 | if (!Check(Out&: S, In: DecodeSPRRegisterClass(Inst, RegNo: Rm , Address, Decoder))) |
| 4919 | return MCDisassembler::Fail; |
| 4920 | if (!Check(Out&: S, In: DecodeSPRRegisterClass(Inst, RegNo: Rm+1, Address, Decoder))) |
| 4921 | return MCDisassembler::Fail; |
| 4922 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 4923 | return MCDisassembler::Fail; |
| 4924 | |
| 4925 | return S; |
| 4926 | } |
| 4927 | |
| 4928 | static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 4929 | const MCDisassembler *Decoder) { |
| 4930 | DecodeStatus S = MCDisassembler::Success; |
| 4931 | unsigned pred = fieldFromInstruction(Insn, StartBit: 4, NumBits: 4); |
| 4932 | unsigned mask = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 4933 | |
| 4934 | if (pred == 0xF) { |
| 4935 | pred = 0xE; |
| 4936 | S = MCDisassembler::SoftFail; |
| 4937 | } |
| 4938 | |
| 4939 | if (mask == 0x0) |
| 4940 | return MCDisassembler::Fail; |
| 4941 | |
| 4942 | // IT masks are encoded as a sequence of replacement low-order bits |
| 4943 | // for the condition code. So if the low bit of the starting |
| 4944 | // condition code is 1, then we have to flip all the bits above the |
| 4945 | // terminating bit (which is the lowest 1 bit). |
| 4946 | if (pred & 1) { |
| 4947 | unsigned LowBit = mask & -mask; |
| 4948 | unsigned BitsAboveLowBit = 0xF & (-LowBit << 1); |
| 4949 | mask ^= BitsAboveLowBit; |
| 4950 | } |
| 4951 | |
| 4952 | Inst.addOperand(Op: MCOperand::createImm(Val: pred)); |
| 4953 | Inst.addOperand(Op: MCOperand::createImm(Val: mask)); |
| 4954 | return S; |
| 4955 | } |
| 4956 | |
| 4957 | static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn, |
| 4958 | uint64_t Address, |
| 4959 | const MCDisassembler *Decoder) { |
| 4960 | DecodeStatus S = MCDisassembler::Success; |
| 4961 | |
| 4962 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 4963 | unsigned Rt2 = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 4964 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 4965 | unsigned addr = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 4966 | unsigned W = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 4967 | unsigned U = fieldFromInstruction(Insn, StartBit: 23, NumBits: 1); |
| 4968 | unsigned P = fieldFromInstruction(Insn, StartBit: 24, NumBits: 1); |
| 4969 | bool writeback = (W == 1) | (P == 0); |
| 4970 | |
| 4971 | addr |= (U << 8) | (Rn << 9); |
| 4972 | |
| 4973 | if (writeback && (Rn == Rt || Rn == Rt2)) |
| 4974 | Check(Out&: S, In: MCDisassembler::SoftFail); |
| 4975 | if (Rt == Rt2) |
| 4976 | Check(Out&: S, In: MCDisassembler::SoftFail); |
| 4977 | |
| 4978 | // Rt |
| 4979 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 4980 | return MCDisassembler::Fail; |
| 4981 | // Rt2 |
| 4982 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rt2, Address, Decoder))) |
| 4983 | return MCDisassembler::Fail; |
| 4984 | // Writeback operand |
| 4985 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 4986 | return MCDisassembler::Fail; |
| 4987 | // addr |
| 4988 | if (!Check(Out&: S, In: DecodeT2AddrModeImm8s4(Inst, Val: addr, Address, Decoder))) |
| 4989 | return MCDisassembler::Fail; |
| 4990 | |
| 4991 | DecodePredicateOperand(Inst, Decoder); |
| 4992 | return S; |
| 4993 | } |
| 4994 | |
| 4995 | static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn, |
| 4996 | uint64_t Address, |
| 4997 | const MCDisassembler *Decoder) { |
| 4998 | DecodeStatus S = MCDisassembler::Success; |
| 4999 | |
| 5000 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 5001 | unsigned Rt2 = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 5002 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 5003 | unsigned addr = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 5004 | unsigned W = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 5005 | unsigned U = fieldFromInstruction(Insn, StartBit: 23, NumBits: 1); |
| 5006 | unsigned P = fieldFromInstruction(Insn, StartBit: 24, NumBits: 1); |
| 5007 | bool writeback = (W == 1) | (P == 0); |
| 5008 | |
| 5009 | addr |= (U << 8) | (Rn << 9); |
| 5010 | |
| 5011 | if (writeback && (Rn == Rt || Rn == Rt2)) |
| 5012 | Check(Out&: S, In: MCDisassembler::SoftFail); |
| 5013 | |
| 5014 | // Writeback operand |
| 5015 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 5016 | return MCDisassembler::Fail; |
| 5017 | // Rt |
| 5018 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 5019 | return MCDisassembler::Fail; |
| 5020 | // Rt2 |
| 5021 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rt2, Address, Decoder))) |
| 5022 | return MCDisassembler::Fail; |
| 5023 | // addr |
| 5024 | if (!Check(Out&: S, In: DecodeT2AddrModeImm8s4(Inst, Val: addr, Address, Decoder))) |
| 5025 | return MCDisassembler::Fail; |
| 5026 | |
| 5027 | DecodePredicateOperand(Inst, Decoder); |
| 5028 | return S; |
| 5029 | } |
| 5030 | |
| 5031 | static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn, uint64_t Address, |
| 5032 | const MCDisassembler *Decoder) { |
| 5033 | unsigned sign1 = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 5034 | unsigned sign2 = fieldFromInstruction(Insn, StartBit: 23, NumBits: 1); |
| 5035 | if (sign1 != sign2) return MCDisassembler::Fail; |
| 5036 | const unsigned Rd = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 5037 | assert(Inst.getNumOperands() == 0 && "We should receive an empty Inst" ); |
| 5038 | DecodeStatus S = DecoderGPRRegisterClass(Inst, RegNo: Rd, Address, Decoder); |
| 5039 | |
| 5040 | unsigned Val = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 5041 | Val |= fieldFromInstruction(Insn, StartBit: 12, NumBits: 3) << 8; |
| 5042 | Val |= fieldFromInstruction(Insn, StartBit: 26, NumBits: 1) << 11; |
| 5043 | // If sign, then it is decreasing the address. |
| 5044 | if (sign1) { |
| 5045 | // Following ARMv7 Architecture Manual, when the offset |
| 5046 | // is zero, it is decoded as a subw, not as a adr.w |
| 5047 | if (!Val) { |
| 5048 | Inst.setOpcode(ARM::t2SUBri12); |
| 5049 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::PC)); |
| 5050 | } else |
| 5051 | Val = -Val; |
| 5052 | } |
| 5053 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 5054 | DecodePredicateOperand(Inst, Decoder); |
| 5055 | return S; |
| 5056 | } |
| 5057 | |
| 5058 | static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val, |
| 5059 | uint64_t Address, |
| 5060 | const MCDisassembler *Decoder) { |
| 5061 | DecodeStatus S = MCDisassembler::Success; |
| 5062 | |
| 5063 | // Shift of "asr #32" is not allowed in Thumb2 mode. |
| 5064 | if (Val == 0x20) S = MCDisassembler::Fail; |
| 5065 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 5066 | return S; |
| 5067 | } |
| 5068 | |
| 5069 | static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 5070 | const MCDisassembler *Decoder) { |
| 5071 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 5072 | unsigned Rt2 = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 5073 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 5074 | unsigned pred = fieldFromInstruction(Insn, StartBit: 28, NumBits: 4); |
| 5075 | |
| 5076 | if (pred == 0xF) |
| 5077 | return DecodeCPSInstruction(Inst, Insn, Address, Decoder); |
| 5078 | |
| 5079 | DecodeStatus S = MCDisassembler::Success; |
| 5080 | |
| 5081 | if (Rt == Rn || Rn == Rt2) |
| 5082 | S = MCDisassembler::SoftFail; |
| 5083 | |
| 5084 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 5085 | return MCDisassembler::Fail; |
| 5086 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rt2, Address, Decoder))) |
| 5087 | return MCDisassembler::Fail; |
| 5088 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 5089 | return MCDisassembler::Fail; |
| 5090 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 5091 | return MCDisassembler::Fail; |
| 5092 | |
| 5093 | return S; |
| 5094 | } |
| 5095 | |
| 5096 | static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 5097 | const MCDisassembler *Decoder) { |
| 5098 | const FeatureBitset &featureBits = |
| 5099 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 5100 | bool hasFullFP16 = featureBits[ARM::FeatureFullFP16]; |
| 5101 | |
| 5102 | unsigned Vd = (fieldFromInstruction(Insn, StartBit: 12, NumBits: 4) << 0); |
| 5103 | Vd |= (fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4); |
| 5104 | unsigned Vm = (fieldFromInstruction(Insn, StartBit: 0, NumBits: 4) << 0); |
| 5105 | Vm |= (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 4); |
| 5106 | unsigned imm = fieldFromInstruction(Insn, StartBit: 16, NumBits: 6); |
| 5107 | unsigned cmode = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 5108 | unsigned op = fieldFromInstruction(Insn, StartBit: 5, NumBits: 1); |
| 5109 | |
| 5110 | DecodeStatus S = MCDisassembler::Success; |
| 5111 | |
| 5112 | // If the top 3 bits of imm are clear, this is a VMOV (immediate) |
| 5113 | if (!(imm & 0x38)) { |
| 5114 | if (cmode == 0xF) { |
| 5115 | if (op == 1) return MCDisassembler::Fail; |
| 5116 | Inst.setOpcode(ARM::VMOVv2f32); |
| 5117 | } |
| 5118 | if (hasFullFP16) { |
| 5119 | if (cmode == 0xE) { |
| 5120 | if (op == 1) { |
| 5121 | Inst.setOpcode(ARM::VMOVv1i64); |
| 5122 | } else { |
| 5123 | Inst.setOpcode(ARM::VMOVv8i8); |
| 5124 | } |
| 5125 | } |
| 5126 | if (cmode == 0xD) { |
| 5127 | if (op == 1) { |
| 5128 | Inst.setOpcode(ARM::VMVNv2i32); |
| 5129 | } else { |
| 5130 | Inst.setOpcode(ARM::VMOVv2i32); |
| 5131 | } |
| 5132 | } |
| 5133 | if (cmode == 0xC) { |
| 5134 | if (op == 1) { |
| 5135 | Inst.setOpcode(ARM::VMVNv2i32); |
| 5136 | } else { |
| 5137 | Inst.setOpcode(ARM::VMOVv2i32); |
| 5138 | } |
| 5139 | } |
| 5140 | } |
| 5141 | return DecodeVMOVModImmInstruction(Inst, Insn, Address, Decoder); |
| 5142 | } |
| 5143 | |
| 5144 | if (!(imm & 0x20)) return MCDisassembler::Fail; |
| 5145 | |
| 5146 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Vd, Address, Decoder))) |
| 5147 | return MCDisassembler::Fail; |
| 5148 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Vm, Address, Decoder))) |
| 5149 | return MCDisassembler::Fail; |
| 5150 | Inst.addOperand(Op: MCOperand::createImm(Val: 64 - imm)); |
| 5151 | |
| 5152 | DecodePredicateOperand(Inst, Decoder); |
| 5153 | return S; |
| 5154 | } |
| 5155 | |
| 5156 | static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 5157 | const MCDisassembler *Decoder) { |
| 5158 | const FeatureBitset &featureBits = |
| 5159 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 5160 | bool hasFullFP16 = featureBits[ARM::FeatureFullFP16]; |
| 5161 | |
| 5162 | unsigned Vd = (fieldFromInstruction(Insn, StartBit: 12, NumBits: 4) << 0); |
| 5163 | Vd |= (fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4); |
| 5164 | unsigned Vm = (fieldFromInstruction(Insn, StartBit: 0, NumBits: 4) << 0); |
| 5165 | Vm |= (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 4); |
| 5166 | unsigned imm = fieldFromInstruction(Insn, StartBit: 16, NumBits: 6); |
| 5167 | unsigned cmode = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 5168 | unsigned op = fieldFromInstruction(Insn, StartBit: 5, NumBits: 1); |
| 5169 | |
| 5170 | DecodeStatus S = MCDisassembler::Success; |
| 5171 | |
| 5172 | // If the top 3 bits of imm are clear, this is a VMOV (immediate) |
| 5173 | if (!(imm & 0x38)) { |
| 5174 | if (cmode == 0xF) { |
| 5175 | if (op == 1) return MCDisassembler::Fail; |
| 5176 | Inst.setOpcode(ARM::VMOVv4f32); |
| 5177 | } |
| 5178 | if (hasFullFP16) { |
| 5179 | if (cmode == 0xE) { |
| 5180 | if (op == 1) { |
| 5181 | Inst.setOpcode(ARM::VMOVv2i64); |
| 5182 | } else { |
| 5183 | Inst.setOpcode(ARM::VMOVv16i8); |
| 5184 | } |
| 5185 | } |
| 5186 | if (cmode == 0xD) { |
| 5187 | if (op == 1) { |
| 5188 | Inst.setOpcode(ARM::VMVNv4i32); |
| 5189 | } else { |
| 5190 | Inst.setOpcode(ARM::VMOVv4i32); |
| 5191 | } |
| 5192 | } |
| 5193 | if (cmode == 0xC) { |
| 5194 | if (op == 1) { |
| 5195 | Inst.setOpcode(ARM::VMVNv4i32); |
| 5196 | } else { |
| 5197 | Inst.setOpcode(ARM::VMOVv4i32); |
| 5198 | } |
| 5199 | } |
| 5200 | } |
| 5201 | return DecodeVMOVModImmInstruction(Inst, Insn, Address, Decoder); |
| 5202 | } |
| 5203 | |
| 5204 | if (!(imm & 0x20)) return MCDisassembler::Fail; |
| 5205 | |
| 5206 | if (!Check(Out&: S, In: DecodeQPRRegisterClass(Inst, RegNo: Vd, Address, Decoder))) |
| 5207 | return MCDisassembler::Fail; |
| 5208 | if (!Check(Out&: S, In: DecodeQPRRegisterClass(Inst, RegNo: Vm, Address, Decoder))) |
| 5209 | return MCDisassembler::Fail; |
| 5210 | Inst.addOperand(Op: MCOperand::createImm(Val: 64 - imm)); |
| 5211 | |
| 5212 | DecodePredicateOperand(Inst, Decoder); |
| 5213 | return S; |
| 5214 | } |
| 5215 | |
| 5216 | static DecodeStatus |
| 5217 | DecodeNEONComplexLane64Instruction(MCInst &Inst, unsigned Insn, |
| 5218 | uint64_t Address, |
| 5219 | const MCDisassembler *Decoder) { |
| 5220 | unsigned Vd = (fieldFromInstruction(Insn, StartBit: 12, NumBits: 4) << 0); |
| 5221 | Vd |= (fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 4); |
| 5222 | unsigned Vn = (fieldFromInstruction(Insn, StartBit: 16, NumBits: 4) << 0); |
| 5223 | Vn |= (fieldFromInstruction(Insn, StartBit: 7, NumBits: 1) << 4); |
| 5224 | unsigned Vm = (fieldFromInstruction(Insn, StartBit: 0, NumBits: 4) << 0); |
| 5225 | Vm |= (fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 4); |
| 5226 | unsigned q = (fieldFromInstruction(Insn, StartBit: 6, NumBits: 1) << 0); |
| 5227 | unsigned rotate = (fieldFromInstruction(Insn, StartBit: 20, NumBits: 2) << 0); |
| 5228 | |
| 5229 | DecodeStatus S = MCDisassembler::Success; |
| 5230 | |
| 5231 | auto DestRegDecoder = q ? DecodeQPRRegisterClass : DecodeDPRRegisterClass; |
| 5232 | |
| 5233 | if (!Check(Out&: S, In: DestRegDecoder(Inst, Vd, Address, Decoder))) |
| 5234 | return MCDisassembler::Fail; |
| 5235 | if (!Check(Out&: S, In: DestRegDecoder(Inst, Vd, Address, Decoder))) |
| 5236 | return MCDisassembler::Fail; |
| 5237 | if (!Check(Out&: S, In: DestRegDecoder(Inst, Vn, Address, Decoder))) |
| 5238 | return MCDisassembler::Fail; |
| 5239 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: Vm, Address, Decoder))) |
| 5240 | return MCDisassembler::Fail; |
| 5241 | // The lane index does not have any bits in the encoding, because it can only |
| 5242 | // be 0. |
| 5243 | Inst.addOperand(Op: MCOperand::createImm(Val: 0)); |
| 5244 | Inst.addOperand(Op: MCOperand::createImm(Val: rotate)); |
| 5245 | |
| 5246 | return S; |
| 5247 | } |
| 5248 | |
| 5249 | static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val, uint64_t Address, |
| 5250 | const MCDisassembler *Decoder) { |
| 5251 | DecodeStatus S = MCDisassembler::Success; |
| 5252 | |
| 5253 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 16, NumBits: 4); |
| 5254 | unsigned Rt = fieldFromInstruction(Insn: Val, StartBit: 12, NumBits: 4); |
| 5255 | unsigned Rm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 4); |
| 5256 | Rm |= (fieldFromInstruction(Insn: Val, StartBit: 23, NumBits: 1) << 4); |
| 5257 | unsigned Cond = fieldFromInstruction(Insn: Val, StartBit: 28, NumBits: 4); |
| 5258 | |
| 5259 | if (fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 4) != 0 || Rn == Rt) |
| 5260 | S = MCDisassembler::SoftFail; |
| 5261 | |
| 5262 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 5263 | return MCDisassembler::Fail; |
| 5264 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 5265 | return MCDisassembler::Fail; |
| 5266 | if (!Check(Out&: S, In: DecodeAddrMode7Operand(Inst, Val: Rn, Address, Decoder))) |
| 5267 | return MCDisassembler::Fail; |
| 5268 | if (!Check(Out&: S, In: DecodePostIdxReg(Inst, Insn: Rm, Address, Decoder))) |
| 5269 | return MCDisassembler::Fail; |
| 5270 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: Cond, Address, Decoder))) |
| 5271 | return MCDisassembler::Fail; |
| 5272 | |
| 5273 | return S; |
| 5274 | } |
| 5275 | |
| 5276 | static DecodeStatus DecoderForMRRC2AndMCRR2(MCInst &Inst, unsigned Val, |
| 5277 | uint64_t Address, |
| 5278 | const MCDisassembler *Decoder) { |
| 5279 | DecodeStatus S = MCDisassembler::Success; |
| 5280 | |
| 5281 | unsigned CRm = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 4); |
| 5282 | unsigned opc1 = fieldFromInstruction(Insn: Val, StartBit: 4, NumBits: 4); |
| 5283 | unsigned cop = fieldFromInstruction(Insn: Val, StartBit: 8, NumBits: 4); |
| 5284 | unsigned Rt = fieldFromInstruction(Insn: Val, StartBit: 12, NumBits: 4); |
| 5285 | unsigned Rt2 = fieldFromInstruction(Insn: Val, StartBit: 16, NumBits: 4); |
| 5286 | |
| 5287 | if ((cop & ~0x1) == 0xa) |
| 5288 | return MCDisassembler::Fail; |
| 5289 | |
| 5290 | if (Rt == Rt2) |
| 5291 | S = MCDisassembler::SoftFail; |
| 5292 | |
| 5293 | // We have to check if the instruction is MRRC2 |
| 5294 | // or MCRR2 when constructing the operands for |
| 5295 | // Inst. Reason is because MRRC2 stores to two |
| 5296 | // registers so it's tablegen desc has two |
| 5297 | // outputs whereas MCRR doesn't store to any |
| 5298 | // registers so all of it's operands are listed |
| 5299 | // as inputs, therefore the operand order for |
| 5300 | // MRRC2 needs to be [Rt, Rt2, cop, opc1, CRm] |
| 5301 | // and MCRR2 operand order is [cop, opc1, Rt, Rt2, CRm] |
| 5302 | |
| 5303 | if (Inst.getOpcode() == ARM::MRRC2) { |
| 5304 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 5305 | return MCDisassembler::Fail; |
| 5306 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rt2, Address, Decoder))) |
| 5307 | return MCDisassembler::Fail; |
| 5308 | } |
| 5309 | Inst.addOperand(Op: MCOperand::createImm(Val: cop)); |
| 5310 | Inst.addOperand(Op: MCOperand::createImm(Val: opc1)); |
| 5311 | if (Inst.getOpcode() == ARM::MCRR2) { |
| 5312 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 5313 | return MCDisassembler::Fail; |
| 5314 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rt2, Address, Decoder))) |
| 5315 | return MCDisassembler::Fail; |
| 5316 | } |
| 5317 | Inst.addOperand(Op: MCOperand::createImm(Val: CRm)); |
| 5318 | |
| 5319 | return S; |
| 5320 | } |
| 5321 | |
| 5322 | static DecodeStatus DecodeForVMRSandVMSR(MCInst &Inst, unsigned Val, |
| 5323 | uint64_t Address, |
| 5324 | const MCDisassembler *Decoder) { |
| 5325 | const FeatureBitset &featureBits = |
| 5326 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 5327 | DecodeStatus S = MCDisassembler::Success; |
| 5328 | |
| 5329 | // Add explicit operand for the destination sysreg, for cases where |
| 5330 | // we have to model it for code generation purposes. |
| 5331 | switch (Inst.getOpcode()) { |
| 5332 | case ARM::VMSR_FPSCR_NZCVQC: |
| 5333 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::FPSCR_NZCV)); |
| 5334 | break; |
| 5335 | case ARM::VMSR_P0: |
| 5336 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::VPR)); |
| 5337 | break; |
| 5338 | } |
| 5339 | |
| 5340 | if (Inst.getOpcode() != ARM::FMSTAT) { |
| 5341 | unsigned Rt = fieldFromInstruction(Insn: Val, StartBit: 12, NumBits: 4); |
| 5342 | |
| 5343 | if (featureBits[ARM::ModeThumb] && !featureBits[ARM::HasV8Ops]) { |
| 5344 | if (Rt == 13 || Rt == 15) |
| 5345 | S = MCDisassembler::SoftFail; |
| 5346 | Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder)); |
| 5347 | } else |
| 5348 | Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rt, Address, Decoder)); |
| 5349 | } |
| 5350 | |
| 5351 | // Add explicit operand for the source sysreg, similarly to above. |
| 5352 | switch (Inst.getOpcode()) { |
| 5353 | case ARM::VMRS_FPSCR_NZCVQC: |
| 5354 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::FPSCR_NZCV)); |
| 5355 | break; |
| 5356 | case ARM::VMRS_P0: |
| 5357 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::VPR)); |
| 5358 | break; |
| 5359 | } |
| 5360 | |
| 5361 | if (featureBits[ARM::ModeThumb]) { |
| 5362 | Inst.addOperand(Op: MCOperand::createImm(Val: ARMCC::AL)); |
| 5363 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 5364 | } else { |
| 5365 | unsigned pred = fieldFromInstruction(Insn: Val, StartBit: 28, NumBits: 4); |
| 5366 | if (!Check(Out&: S, In: DecodePredicateOperand(Inst, Val: pred, Address, Decoder))) |
| 5367 | return MCDisassembler::Fail; |
| 5368 | } |
| 5369 | |
| 5370 | return S; |
| 5371 | } |
| 5372 | |
| 5373 | template <bool isSigned, bool isNeg, bool zeroPermitted, int size> |
| 5374 | static DecodeStatus DecodeBFLabelOperand(MCInst &Inst, unsigned Val, |
| 5375 | uint64_t Address, |
| 5376 | const MCDisassembler *Decoder) { |
| 5377 | DecodeStatus S = MCDisassembler::Success; |
| 5378 | if (Val == 0 && !zeroPermitted) |
| 5379 | S = MCDisassembler::Fail; |
| 5380 | |
| 5381 | uint64_t DecVal; |
| 5382 | if (isSigned) |
| 5383 | DecVal = SignExtend32<size + 1>(Val << 1); |
| 5384 | else |
| 5385 | DecVal = (Val << 1); |
| 5386 | |
| 5387 | if (!tryAddingSymbolicOperand(Address, Value: Address + DecVal + 4, isBranch: true, InstSize: 4, MI&: Inst, |
| 5388 | Decoder)) |
| 5389 | Inst.addOperand(Op: MCOperand::createImm(Val: isNeg ? -DecVal : DecVal)); |
| 5390 | return S; |
| 5391 | } |
| 5392 | |
| 5393 | static DecodeStatus DecodeBFAfterTargetOperand(MCInst &Inst, unsigned Val, |
| 5394 | uint64_t Address, |
| 5395 | const MCDisassembler *Decoder) { |
| 5396 | |
| 5397 | uint64_t LocImm = Inst.getOperand(i: 0).getImm(); |
| 5398 | Val = LocImm + (2 << Val); |
| 5399 | if (!tryAddingSymbolicOperand(Address, Value: Address + Val + 4, isBranch: true, InstSize: 4, MI&: Inst, |
| 5400 | Decoder)) |
| 5401 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 5402 | return MCDisassembler::Success; |
| 5403 | } |
| 5404 | |
| 5405 | static DecodeStatus DecodePredNoALOperand(MCInst &Inst, unsigned Val, |
| 5406 | uint64_t Address, |
| 5407 | const MCDisassembler *Decoder) { |
| 5408 | if (Val >= ARMCC::AL) // also exclude the non-condition NV |
| 5409 | return MCDisassembler::Fail; |
| 5410 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 5411 | return MCDisassembler::Success; |
| 5412 | } |
| 5413 | |
| 5414 | static DecodeStatus DecodeLOLoop(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 5415 | const MCDisassembler *Decoder) { |
| 5416 | DecodeStatus S = MCDisassembler::Success; |
| 5417 | |
| 5418 | if (Inst.getOpcode() == ARM::MVE_LCTP) { |
| 5419 | DecodePredicateOperand(Inst, Decoder); |
| 5420 | return S; |
| 5421 | } |
| 5422 | |
| 5423 | unsigned Imm = fieldFromInstruction(Insn, StartBit: 11, NumBits: 1) | |
| 5424 | fieldFromInstruction(Insn, StartBit: 1, NumBits: 10) << 1; |
| 5425 | switch (Inst.getOpcode()) { |
| 5426 | case ARM::t2LEUpdate: |
| 5427 | case ARM::MVE_LETP: |
| 5428 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::LR)); |
| 5429 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::LR)); |
| 5430 | [[fallthrough]]; |
| 5431 | case ARM::t2LE: |
| 5432 | if (!Check(Out&: S, In: DecodeBFLabelOperand<false, true, true, 11>( |
| 5433 | Inst, Val: Imm, Address, Decoder))) |
| 5434 | return MCDisassembler::Fail; |
| 5435 | break; |
| 5436 | case ARM::t2WLS: |
| 5437 | case ARM::MVE_WLSTP_8: |
| 5438 | case ARM::MVE_WLSTP_16: |
| 5439 | case ARM::MVE_WLSTP_32: |
| 5440 | case ARM::MVE_WLSTP_64: |
| 5441 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::LR)); |
| 5442 | if (!Check(Out&: S, |
| 5443 | In: DecoderGPRRegisterClass(Inst, RegNo: fieldFromInstruction(Insn, StartBit: 16, NumBits: 4), |
| 5444 | Address, Decoder)) || |
| 5445 | !Check(Out&: S, In: DecodeBFLabelOperand<false, false, true, 11>( |
| 5446 | Inst, Val: Imm, Address, Decoder))) |
| 5447 | return MCDisassembler::Fail; |
| 5448 | break; |
| 5449 | case ARM::t2DLS: |
| 5450 | case ARM::MVE_DLSTP_8: |
| 5451 | case ARM::MVE_DLSTP_16: |
| 5452 | case ARM::MVE_DLSTP_32: |
| 5453 | case ARM::MVE_DLSTP_64: |
| 5454 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 5455 | if (Rn == 0xF) { |
| 5456 | // Enforce all the rest of the instruction bits in LCTP, which |
| 5457 | // won't have been reliably checked based on LCTP's own tablegen |
| 5458 | // record, because we came to this decode by a roundabout route. |
| 5459 | uint32_t CanonicalLCTP = 0xF00FE001, SBZMask = 0x00300FFE; |
| 5460 | if ((Insn & ~SBZMask) != CanonicalLCTP) |
| 5461 | return MCDisassembler::Fail; // a mandatory bit is wrong: hard fail |
| 5462 | if (Insn != CanonicalLCTP) |
| 5463 | Check(Out&: S, In: MCDisassembler::SoftFail); // an SBZ bit is wrong: soft fail |
| 5464 | |
| 5465 | Inst.setOpcode(ARM::MVE_LCTP); |
| 5466 | DecodePredicateOperand(Inst, Decoder); |
| 5467 | } else { |
| 5468 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::LR)); |
| 5469 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, |
| 5470 | RegNo: fieldFromInstruction(Insn, StartBit: 16, NumBits: 4), |
| 5471 | Address, Decoder))) |
| 5472 | return MCDisassembler::Fail; |
| 5473 | } |
| 5474 | break; |
| 5475 | } |
| 5476 | return S; |
| 5477 | } |
| 5478 | |
| 5479 | static DecodeStatus DecodeLongShiftOperand(MCInst &Inst, unsigned Val, |
| 5480 | uint64_t Address, |
| 5481 | const MCDisassembler *Decoder) { |
| 5482 | DecodeStatus S = MCDisassembler::Success; |
| 5483 | |
| 5484 | if (Val == 0) |
| 5485 | Val = 32; |
| 5486 | |
| 5487 | Inst.addOperand(Op: MCOperand::createImm(Val)); |
| 5488 | |
| 5489 | return S; |
| 5490 | } |
| 5491 | |
| 5492 | static DecodeStatus DecodetGPROddRegisterClass(MCInst &Inst, unsigned RegNo, |
| 5493 | uint64_t Address, |
| 5494 | const MCDisassembler *Decoder) { |
| 5495 | if ((RegNo) + 1 > 11) |
| 5496 | return MCDisassembler::Fail; |
| 5497 | |
| 5498 | unsigned Register = GPRDecoderTable[(RegNo) + 1]; |
| 5499 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 5500 | return MCDisassembler::Success; |
| 5501 | } |
| 5502 | |
| 5503 | static DecodeStatus DecodetGPREvenRegisterClass(MCInst &Inst, unsigned RegNo, |
| 5504 | uint64_t Address, |
| 5505 | const MCDisassembler *Decoder) { |
| 5506 | if ((RegNo) > 14) |
| 5507 | return MCDisassembler::Fail; |
| 5508 | |
| 5509 | unsigned Register = GPRDecoderTable[(RegNo)]; |
| 5510 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 5511 | return MCDisassembler::Success; |
| 5512 | } |
| 5513 | |
| 5514 | static DecodeStatus |
| 5515 | DecodeGPRwithAPSR_NZCVnospRegisterClass(MCInst &Inst, unsigned RegNo, |
| 5516 | uint64_t Address, |
| 5517 | const MCDisassembler *Decoder) { |
| 5518 | if (RegNo == 15) { |
| 5519 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::APSR_NZCV)); |
| 5520 | return MCDisassembler::Success; |
| 5521 | } |
| 5522 | |
| 5523 | unsigned Register = GPRDecoderTable[RegNo]; |
| 5524 | Inst.addOperand(Op: MCOperand::createReg(Reg: Register)); |
| 5525 | |
| 5526 | if (RegNo == 13) |
| 5527 | return MCDisassembler::SoftFail; |
| 5528 | |
| 5529 | return MCDisassembler::Success; |
| 5530 | } |
| 5531 | |
| 5532 | static DecodeStatus DecodeVSCCLRM(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 5533 | const MCDisassembler *Decoder) { |
| 5534 | DecodeStatus S = MCDisassembler::Success; |
| 5535 | |
| 5536 | Inst.addOperand(Op: MCOperand::createImm(Val: ARMCC::AL)); |
| 5537 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 5538 | unsigned regs = fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 5539 | if (regs == 0) { |
| 5540 | // Register list contains only VPR |
| 5541 | } else if (Inst.getOpcode() == ARM::VSCCLRMD) { |
| 5542 | unsigned reglist = regs | (fieldFromInstruction(Insn, StartBit: 12, NumBits: 4) << 8) | |
| 5543 | (fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 12); |
| 5544 | if (!Check(Out&: S, In: DecodeDPRRegListOperand(Inst, Val: reglist, Address, Decoder))) { |
| 5545 | return MCDisassembler::Fail; |
| 5546 | } |
| 5547 | } else { |
| 5548 | unsigned Vd = (fieldFromInstruction(Insn, StartBit: 12, NumBits: 4) << 1) | |
| 5549 | fieldFromInstruction(Insn, StartBit: 22, NumBits: 1); |
| 5550 | // Registers past s31 are permitted and treated as being half of a d |
| 5551 | // register, though both halves of each d register must be present. |
| 5552 | unsigned max_reg = Vd + regs; |
| 5553 | if (max_reg > 64 || (max_reg > 32 && (max_reg & 1))) |
| 5554 | S = MCDisassembler::SoftFail; |
| 5555 | unsigned max_sreg = std::min(a: 32u, b: max_reg); |
| 5556 | unsigned max_dreg = std::min(a: 32u, b: max_reg / 2); |
| 5557 | for (unsigned i = Vd; i < max_sreg; ++i) |
| 5558 | if (!Check(Out&: S, In: DecodeSPRRegisterClass(Inst, RegNo: i, Address, Decoder))) |
| 5559 | return MCDisassembler::Fail; |
| 5560 | for (unsigned i = 16; i < max_dreg; ++i) |
| 5561 | if (!Check(Out&: S, In: DecodeDPRRegisterClass(Inst, RegNo: i, Address, Decoder))) |
| 5562 | return MCDisassembler::Fail; |
| 5563 | } |
| 5564 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::VPR)); |
| 5565 | |
| 5566 | return S; |
| 5567 | } |
| 5568 | |
| 5569 | static DecodeStatus DecodeVPTMaskOperand(MCInst &Inst, unsigned Val, |
| 5570 | uint64_t Address, |
| 5571 | const MCDisassembler *Decoder) { |
| 5572 | DecodeStatus S = MCDisassembler::Success; |
| 5573 | |
| 5574 | // Parse VPT mask and encode it in the MCInst as an immediate with the same |
| 5575 | // format as the it_mask. That is, from the second 'e|t' encode 'e' as 1 and |
| 5576 | // 't' as 0 and finish with a 1. |
| 5577 | unsigned Imm = 0; |
| 5578 | // We always start with a 't'. |
| 5579 | unsigned CurBit = 0; |
| 5580 | for (int i = 3; i >= 0; --i) { |
| 5581 | // If the bit we are looking at is not the same as last one, invert the |
| 5582 | // CurBit, if it is the same leave it as is. |
| 5583 | CurBit ^= (Val >> i) & 1U; |
| 5584 | |
| 5585 | // Encode the CurBit at the right place in the immediate. |
| 5586 | Imm |= (CurBit << i); |
| 5587 | |
| 5588 | // If we are done, finish the encoding with a 1. |
| 5589 | if ((Val & ~(~0U << i)) == 0) { |
| 5590 | Imm |= 1U << i; |
| 5591 | break; |
| 5592 | } |
| 5593 | } |
| 5594 | |
| 5595 | Inst.addOperand(Op: MCOperand::createImm(Val: Imm)); |
| 5596 | |
| 5597 | return S; |
| 5598 | } |
| 5599 | |
| 5600 | static DecodeStatus |
| 5601 | DecodeRestrictedIPredicateOperand(MCInst &Inst, unsigned Val, uint64_t Address, |
| 5602 | const MCDisassembler *Decoder) { |
| 5603 | Inst.addOperand(Op: MCOperand::createImm(Val: (Val & 0x1) == 0 ? ARMCC::EQ : ARMCC::NE)); |
| 5604 | return MCDisassembler::Success; |
| 5605 | } |
| 5606 | |
| 5607 | static DecodeStatus |
| 5608 | DecodeRestrictedSPredicateOperand(MCInst &Inst, unsigned Val, uint64_t Address, |
| 5609 | const MCDisassembler *Decoder) { |
| 5610 | unsigned Code; |
| 5611 | switch (Val & 0x3) { |
| 5612 | case 0: |
| 5613 | Code = ARMCC::GE; |
| 5614 | break; |
| 5615 | case 1: |
| 5616 | Code = ARMCC::LT; |
| 5617 | break; |
| 5618 | case 2: |
| 5619 | Code = ARMCC::GT; |
| 5620 | break; |
| 5621 | case 3: |
| 5622 | Code = ARMCC::LE; |
| 5623 | break; |
| 5624 | } |
| 5625 | Inst.addOperand(Op: MCOperand::createImm(Val: Code)); |
| 5626 | return MCDisassembler::Success; |
| 5627 | } |
| 5628 | |
| 5629 | static DecodeStatus |
| 5630 | DecodeRestrictedUPredicateOperand(MCInst &Inst, unsigned Val, uint64_t Address, |
| 5631 | const MCDisassembler *Decoder) { |
| 5632 | Inst.addOperand(Op: MCOperand::createImm(Val: (Val & 0x1) == 0 ? ARMCC::HS : ARMCC::HI)); |
| 5633 | return MCDisassembler::Success; |
| 5634 | } |
| 5635 | |
| 5636 | static DecodeStatus |
| 5637 | DecodeRestrictedFPPredicateOperand(MCInst &Inst, unsigned Val, uint64_t Address, |
| 5638 | const MCDisassembler *Decoder) { |
| 5639 | unsigned Code; |
| 5640 | switch (Val) { |
| 5641 | default: |
| 5642 | return MCDisassembler::Fail; |
| 5643 | case 0: |
| 5644 | Code = ARMCC::EQ; |
| 5645 | break; |
| 5646 | case 1: |
| 5647 | Code = ARMCC::NE; |
| 5648 | break; |
| 5649 | case 4: |
| 5650 | Code = ARMCC::GE; |
| 5651 | break; |
| 5652 | case 5: |
| 5653 | Code = ARMCC::LT; |
| 5654 | break; |
| 5655 | case 6: |
| 5656 | Code = ARMCC::GT; |
| 5657 | break; |
| 5658 | case 7: |
| 5659 | Code = ARMCC::LE; |
| 5660 | break; |
| 5661 | } |
| 5662 | |
| 5663 | Inst.addOperand(Op: MCOperand::createImm(Val: Code)); |
| 5664 | return MCDisassembler::Success; |
| 5665 | } |
| 5666 | |
| 5667 | static DecodeStatus DecodeVCVTImmOperand(MCInst &Inst, unsigned Val, |
| 5668 | uint64_t Address, |
| 5669 | const MCDisassembler *Decoder) { |
| 5670 | DecodeStatus S = MCDisassembler::Success; |
| 5671 | |
| 5672 | unsigned DecodedVal = 64 - Val; |
| 5673 | |
| 5674 | switch (Inst.getOpcode()) { |
| 5675 | case ARM::MVE_VCVTf16s16_fix: |
| 5676 | case ARM::MVE_VCVTs16f16_fix: |
| 5677 | case ARM::MVE_VCVTf16u16_fix: |
| 5678 | case ARM::MVE_VCVTu16f16_fix: |
| 5679 | if (DecodedVal > 16) |
| 5680 | return MCDisassembler::Fail; |
| 5681 | break; |
| 5682 | case ARM::MVE_VCVTf32s32_fix: |
| 5683 | case ARM::MVE_VCVTs32f32_fix: |
| 5684 | case ARM::MVE_VCVTf32u32_fix: |
| 5685 | case ARM::MVE_VCVTu32f32_fix: |
| 5686 | if (DecodedVal > 32) |
| 5687 | return MCDisassembler::Fail; |
| 5688 | break; |
| 5689 | } |
| 5690 | |
| 5691 | Inst.addOperand(Op: MCOperand::createImm(Val: 64 - Val)); |
| 5692 | |
| 5693 | return S; |
| 5694 | } |
| 5695 | |
| 5696 | static unsigned FixedRegForVSTRVLDR_SYSREG(unsigned Opcode) { |
| 5697 | switch (Opcode) { |
| 5698 | case ARM::VSTR_P0_off: |
| 5699 | case ARM::VSTR_P0_pre: |
| 5700 | case ARM::VSTR_P0_post: |
| 5701 | case ARM::VLDR_P0_off: |
| 5702 | case ARM::VLDR_P0_pre: |
| 5703 | case ARM::VLDR_P0_post: |
| 5704 | return ARM::P0; |
| 5705 | case ARM::VSTR_FPSCR_NZCVQC_off: |
| 5706 | case ARM::VSTR_FPSCR_NZCVQC_pre: |
| 5707 | case ARM::VSTR_FPSCR_NZCVQC_post: |
| 5708 | case ARM::VLDR_FPSCR_NZCVQC_off: |
| 5709 | case ARM::VLDR_FPSCR_NZCVQC_pre: |
| 5710 | case ARM::VLDR_FPSCR_NZCVQC_post: |
| 5711 | return ARM::FPSCR; |
| 5712 | default: |
| 5713 | return 0; |
| 5714 | } |
| 5715 | } |
| 5716 | |
| 5717 | template <bool Writeback> |
| 5718 | static DecodeStatus DecodeVSTRVLDR_SYSREG(MCInst &Inst, unsigned Val, |
| 5719 | uint64_t Address, |
| 5720 | const MCDisassembler *Decoder) { |
| 5721 | switch (Inst.getOpcode()) { |
| 5722 | case ARM::VSTR_FPSCR_pre: |
| 5723 | case ARM::VSTR_FPSCR_NZCVQC_pre: |
| 5724 | case ARM::VLDR_FPSCR_pre: |
| 5725 | case ARM::VLDR_FPSCR_NZCVQC_pre: |
| 5726 | case ARM::VSTR_FPSCR_off: |
| 5727 | case ARM::VSTR_FPSCR_NZCVQC_off: |
| 5728 | case ARM::VLDR_FPSCR_off: |
| 5729 | case ARM::VLDR_FPSCR_NZCVQC_off: |
| 5730 | case ARM::VSTR_FPSCR_post: |
| 5731 | case ARM::VSTR_FPSCR_NZCVQC_post: |
| 5732 | case ARM::VLDR_FPSCR_post: |
| 5733 | case ARM::VLDR_FPSCR_NZCVQC_post: |
| 5734 | const FeatureBitset &featureBits = |
| 5735 | Decoder->getSubtargetInfo().getFeatureBits(); |
| 5736 | |
| 5737 | if (!featureBits[ARM::HasMVEIntegerOps] && !featureBits[ARM::FeatureVFP2]) |
| 5738 | return MCDisassembler::Fail; |
| 5739 | } |
| 5740 | |
| 5741 | DecodeStatus S = MCDisassembler::Success; |
| 5742 | if (unsigned Sysreg = FixedRegForVSTRVLDR_SYSREG(Opcode: Inst.getOpcode())) |
| 5743 | Inst.addOperand(Op: MCOperand::createReg(Reg: Sysreg)); |
| 5744 | unsigned Rn = fieldFromInstruction(Insn: Val, StartBit: 16, NumBits: 4); |
| 5745 | unsigned addr = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 7) | |
| 5746 | (fieldFromInstruction(Insn: Val, StartBit: 23, NumBits: 1) << 7) | (Rn << 8); |
| 5747 | |
| 5748 | if (Writeback) { |
| 5749 | if (!Check(Out&: S, In: DecodeGPRnopcRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 5750 | return MCDisassembler::Fail; |
| 5751 | } |
| 5752 | if (!Check(Out&: S, In: DecodeT2AddrModeImm7s4(Inst, Val: addr, Address, Decoder))) |
| 5753 | return MCDisassembler::Fail; |
| 5754 | |
| 5755 | Inst.addOperand(Op: MCOperand::createImm(Val: ARMCC::AL)); |
| 5756 | Inst.addOperand(Op: MCOperand::createReg(Reg: 0)); |
| 5757 | |
| 5758 | return S; |
| 5759 | } |
| 5760 | |
| 5761 | static inline DecodeStatus |
| 5762 | DecodeMVE_MEM_pre(MCInst &Inst, unsigned Val, uint64_t Address, |
| 5763 | const MCDisassembler *Decoder, unsigned Rn, |
| 5764 | OperandDecoder RnDecoder, OperandDecoder AddrDecoder) { |
| 5765 | DecodeStatus S = MCDisassembler::Success; |
| 5766 | |
| 5767 | unsigned Qd = fieldFromInstruction(Insn: Val, StartBit: 13, NumBits: 3); |
| 5768 | unsigned addr = fieldFromInstruction(Insn: Val, StartBit: 0, NumBits: 7) | |
| 5769 | (fieldFromInstruction(Insn: Val, StartBit: 23, NumBits: 1) << 7) | (Rn << 8); |
| 5770 | |
| 5771 | if (!Check(Out&: S, In: RnDecoder(Inst, Rn, Address, Decoder))) |
| 5772 | return MCDisassembler::Fail; |
| 5773 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qd, Address, Decoder))) |
| 5774 | return MCDisassembler::Fail; |
| 5775 | if (!Check(Out&: S, In: AddrDecoder(Inst, addr, Address, Decoder))) |
| 5776 | return MCDisassembler::Fail; |
| 5777 | |
| 5778 | Check(Out&: S, In: DecodeVpredNOperand(Inst, Decoder)); |
| 5779 | return S; |
| 5780 | } |
| 5781 | |
| 5782 | template <int shift> |
| 5783 | static DecodeStatus DecodeMVE_MEM_1_pre(MCInst &Inst, unsigned Val, |
| 5784 | uint64_t Address, |
| 5785 | const MCDisassembler *Decoder) { |
| 5786 | return DecodeMVE_MEM_pre(Inst, Val, Address, Decoder, |
| 5787 | fieldFromInstruction(Insn: Val, StartBit: 16, NumBits: 3), |
| 5788 | DecodetGPRRegisterClass, |
| 5789 | DecodeTAddrModeImm7<shift>); |
| 5790 | } |
| 5791 | |
| 5792 | template <int shift> |
| 5793 | static DecodeStatus DecodeMVE_MEM_2_pre(MCInst &Inst, unsigned Val, |
| 5794 | uint64_t Address, |
| 5795 | const MCDisassembler *Decoder) { |
| 5796 | return DecodeMVE_MEM_pre(Inst, Val, Address, Decoder, |
| 5797 | fieldFromInstruction(Insn: Val, StartBit: 16, NumBits: 4), |
| 5798 | DecoderGPRRegisterClass, |
| 5799 | DecodeT2AddrModeImm7<shift,1>); |
| 5800 | } |
| 5801 | |
| 5802 | template <int shift> |
| 5803 | static DecodeStatus DecodeMVE_MEM_3_pre(MCInst &Inst, unsigned Val, |
| 5804 | uint64_t Address, |
| 5805 | const MCDisassembler *Decoder) { |
| 5806 | return DecodeMVE_MEM_pre(Inst, Val, Address, Decoder, |
| 5807 | fieldFromInstruction(Insn: Val, StartBit: 17, NumBits: 3), |
| 5808 | DecodeMQPRRegisterClass, |
| 5809 | DecodeMveAddrModeQ<shift>); |
| 5810 | } |
| 5811 | |
| 5812 | template <unsigned MinLog, unsigned MaxLog> |
| 5813 | static DecodeStatus DecodePowerTwoOperand(MCInst &Inst, unsigned Val, |
| 5814 | uint64_t Address, |
| 5815 | const MCDisassembler *Decoder) { |
| 5816 | DecodeStatus S = MCDisassembler::Success; |
| 5817 | |
| 5818 | if (Val < MinLog || Val > MaxLog) |
| 5819 | return MCDisassembler::Fail; |
| 5820 | |
| 5821 | Inst.addOperand(Op: MCOperand::createImm(Val: 1LL << Val)); |
| 5822 | return S; |
| 5823 | } |
| 5824 | |
| 5825 | template <unsigned start> |
| 5826 | static DecodeStatus |
| 5827 | DecodeMVEPairVectorIndexOperand(MCInst &Inst, unsigned Val, uint64_t Address, |
| 5828 | const MCDisassembler *Decoder) { |
| 5829 | DecodeStatus S = MCDisassembler::Success; |
| 5830 | |
| 5831 | Inst.addOperand(Op: MCOperand::createImm(Val: start + Val)); |
| 5832 | |
| 5833 | return S; |
| 5834 | } |
| 5835 | |
| 5836 | static DecodeStatus DecodeMVEVMOVQtoDReg(MCInst &Inst, unsigned Insn, |
| 5837 | uint64_t Address, |
| 5838 | const MCDisassembler *Decoder) { |
| 5839 | DecodeStatus S = MCDisassembler::Success; |
| 5840 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 5841 | unsigned Rt2 = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 5842 | unsigned Qd = ((fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 3) | |
| 5843 | fieldFromInstruction(Insn, StartBit: 13, NumBits: 3)); |
| 5844 | unsigned index = fieldFromInstruction(Insn, StartBit: 4, NumBits: 1); |
| 5845 | |
| 5846 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 5847 | return MCDisassembler::Fail; |
| 5848 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt2, Address, Decoder))) |
| 5849 | return MCDisassembler::Fail; |
| 5850 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qd, Address, Decoder))) |
| 5851 | return MCDisassembler::Fail; |
| 5852 | if (!Check(Out&: S, In: DecodeMVEPairVectorIndexOperand<2>(Inst, Val: index, Address, Decoder))) |
| 5853 | return MCDisassembler::Fail; |
| 5854 | if (!Check(Out&: S, In: DecodeMVEPairVectorIndexOperand<0>(Inst, Val: index, Address, Decoder))) |
| 5855 | return MCDisassembler::Fail; |
| 5856 | |
| 5857 | DecodePredicateOperand(Inst, Decoder); |
| 5858 | return S; |
| 5859 | } |
| 5860 | |
| 5861 | static DecodeStatus DecodeMVEVMOVDRegtoQ(MCInst &Inst, unsigned Insn, |
| 5862 | uint64_t Address, |
| 5863 | const MCDisassembler *Decoder) { |
| 5864 | DecodeStatus S = MCDisassembler::Success; |
| 5865 | unsigned Rt = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 5866 | unsigned Rt2 = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 5867 | unsigned Qd = ((fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 3) | |
| 5868 | fieldFromInstruction(Insn, StartBit: 13, NumBits: 3)); |
| 5869 | unsigned index = fieldFromInstruction(Insn, StartBit: 4, NumBits: 1); |
| 5870 | |
| 5871 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qd, Address, Decoder))) |
| 5872 | return MCDisassembler::Fail; |
| 5873 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qd, Address, Decoder))) |
| 5874 | return MCDisassembler::Fail; |
| 5875 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt, Address, Decoder))) |
| 5876 | return MCDisassembler::Fail; |
| 5877 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rt2, Address, Decoder))) |
| 5878 | return MCDisassembler::Fail; |
| 5879 | if (!Check(Out&: S, In: DecodeMVEPairVectorIndexOperand<2>(Inst, Val: index, Address, Decoder))) |
| 5880 | return MCDisassembler::Fail; |
| 5881 | if (!Check(Out&: S, In: DecodeMVEPairVectorIndexOperand<0>(Inst, Val: index, Address, Decoder))) |
| 5882 | return MCDisassembler::Fail; |
| 5883 | |
| 5884 | DecodePredicateOperand(Inst, Decoder); |
| 5885 | return S; |
| 5886 | } |
| 5887 | |
| 5888 | static DecodeStatus |
| 5889 | DecodeMVEOverlappingLongShift(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 5890 | const MCDisassembler *Decoder) { |
| 5891 | DecodeStatus S = MCDisassembler::Success; |
| 5892 | |
| 5893 | unsigned RdaLo = fieldFromInstruction(Insn, StartBit: 17, NumBits: 3) << 1; |
| 5894 | unsigned RdaHi = fieldFromInstruction(Insn, StartBit: 9, NumBits: 3) << 1; |
| 5895 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 12, NumBits: 4); |
| 5896 | |
| 5897 | if (RdaHi == 14) { |
| 5898 | // This value of RdaHi (really indicating pc, because RdaHi has to |
| 5899 | // be an odd-numbered register, so the low bit will be set by the |
| 5900 | // decode function below) indicates that we must decode as SQRSHR |
| 5901 | // or UQRSHL, which both have a single Rda register field with all |
| 5902 | // four bits. |
| 5903 | unsigned Rda = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 5904 | |
| 5905 | switch (Inst.getOpcode()) { |
| 5906 | case ARM::MVE_ASRLr: |
| 5907 | case ARM::MVE_SQRSHRL: |
| 5908 | Inst.setOpcode(ARM::MVE_SQRSHR); |
| 5909 | break; |
| 5910 | case ARM::MVE_LSLLr: |
| 5911 | case ARM::MVE_UQRSHLL: |
| 5912 | Inst.setOpcode(ARM::MVE_UQRSHL); |
| 5913 | break; |
| 5914 | default: |
| 5915 | llvm_unreachable("Unexpected starting opcode!" ); |
| 5916 | } |
| 5917 | |
| 5918 | // Rda as output parameter |
| 5919 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rda, Address, Decoder))) |
| 5920 | return MCDisassembler::Fail; |
| 5921 | |
| 5922 | // Rda again as input parameter |
| 5923 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rda, Address, Decoder))) |
| 5924 | return MCDisassembler::Fail; |
| 5925 | |
| 5926 | // Rm, the amount to shift by |
| 5927 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 5928 | return MCDisassembler::Fail; |
| 5929 | |
| 5930 | DecodePredicateOperand(Inst, Decoder); |
| 5931 | |
| 5932 | if (fieldFromInstruction (Insn, StartBit: 6, NumBits: 3) != 4) |
| 5933 | return MCDisassembler::SoftFail; |
| 5934 | |
| 5935 | if (Rda == Rm) |
| 5936 | return MCDisassembler::SoftFail; |
| 5937 | |
| 5938 | return S; |
| 5939 | } |
| 5940 | |
| 5941 | // Otherwise, we decode as whichever opcode our caller has already |
| 5942 | // put into Inst. Those all look the same: |
| 5943 | |
| 5944 | // RdaLo,RdaHi as output parameters |
| 5945 | if (!Check(Out&: S, In: DecodetGPREvenRegisterClass(Inst, RegNo: RdaLo, Address, Decoder))) |
| 5946 | return MCDisassembler::Fail; |
| 5947 | if (!Check(Out&: S, In: DecodetGPROddRegisterClass(Inst, RegNo: RdaHi, Address, Decoder))) |
| 5948 | return MCDisassembler::Fail; |
| 5949 | |
| 5950 | // RdaLo,RdaHi again as input parameters |
| 5951 | if (!Check(Out&: S, In: DecodetGPREvenRegisterClass(Inst, RegNo: RdaLo, Address, Decoder))) |
| 5952 | return MCDisassembler::Fail; |
| 5953 | if (!Check(Out&: S, In: DecodetGPROddRegisterClass(Inst, RegNo: RdaHi, Address, Decoder))) |
| 5954 | return MCDisassembler::Fail; |
| 5955 | |
| 5956 | // Rm, the amount to shift by |
| 5957 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 5958 | return MCDisassembler::Fail; |
| 5959 | |
| 5960 | if (Inst.getOpcode() == ARM::MVE_SQRSHRL || |
| 5961 | Inst.getOpcode() == ARM::MVE_UQRSHLL) { |
| 5962 | unsigned Saturate = fieldFromInstruction(Insn, StartBit: 7, NumBits: 1); |
| 5963 | // Saturate, the bit position for saturation |
| 5964 | Inst.addOperand(Op: MCOperand::createImm(Val: Saturate)); |
| 5965 | } |
| 5966 | |
| 5967 | DecodePredicateOperand(Inst, Decoder); |
| 5968 | return S; |
| 5969 | } |
| 5970 | |
| 5971 | static DecodeStatus DecodeMVEVCVTt1fp(MCInst &Inst, unsigned Insn, |
| 5972 | uint64_t Address, |
| 5973 | const MCDisassembler *Decoder) { |
| 5974 | DecodeStatus S = MCDisassembler::Success; |
| 5975 | unsigned Qd = ((fieldFromInstruction(Insn, StartBit: 22, NumBits: 1) << 3) | |
| 5976 | fieldFromInstruction(Insn, StartBit: 13, NumBits: 3)); |
| 5977 | unsigned Qm = ((fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 3) | |
| 5978 | fieldFromInstruction(Insn, StartBit: 1, NumBits: 3)); |
| 5979 | unsigned imm6 = fieldFromInstruction(Insn, StartBit: 16, NumBits: 6); |
| 5980 | |
| 5981 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qd, Address, Decoder))) |
| 5982 | return MCDisassembler::Fail; |
| 5983 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qm, Address, Decoder))) |
| 5984 | return MCDisassembler::Fail; |
| 5985 | if (!Check(Out&: S, In: DecodeVCVTImmOperand(Inst, Val: imm6, Address, Decoder))) |
| 5986 | return MCDisassembler::Fail; |
| 5987 | Check(Out&: S, In: DecodeVpredROperand(Inst, Decoder)); |
| 5988 | return S; |
| 5989 | } |
| 5990 | |
| 5991 | template <bool scalar, OperandDecoder predicate_decoder> |
| 5992 | static DecodeStatus DecodeMVEVCMP(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 5993 | const MCDisassembler *Decoder) { |
| 5994 | DecodeStatus S = MCDisassembler::Success; |
| 5995 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::VPR)); |
| 5996 | unsigned Qn = fieldFromInstruction(Insn, StartBit: 17, NumBits: 3); |
| 5997 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qn, Address, Decoder))) |
| 5998 | return MCDisassembler::Fail; |
| 5999 | |
| 6000 | unsigned fc; |
| 6001 | |
| 6002 | if (scalar) { |
| 6003 | fc = fieldFromInstruction(Insn, StartBit: 12, NumBits: 1) << 2 | |
| 6004 | fieldFromInstruction(Insn, StartBit: 7, NumBits: 1) | |
| 6005 | fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 1; |
| 6006 | unsigned Rm = fieldFromInstruction(Insn, StartBit: 0, NumBits: 4); |
| 6007 | if (!Check(Out&: S, In: DecodeGPRwithZRRegisterClass(Inst, RegNo: Rm, Address, Decoder))) |
| 6008 | return MCDisassembler::Fail; |
| 6009 | } else { |
| 6010 | fc = fieldFromInstruction(Insn, StartBit: 12, NumBits: 1) << 2 | |
| 6011 | fieldFromInstruction(Insn, StartBit: 7, NumBits: 1) | |
| 6012 | fieldFromInstruction(Insn, StartBit: 0, NumBits: 1) << 1; |
| 6013 | unsigned Qm = fieldFromInstruction(Insn, StartBit: 5, NumBits: 1) << 4 | |
| 6014 | fieldFromInstruction(Insn, StartBit: 1, NumBits: 3); |
| 6015 | if (!Check(Out&: S, In: DecodeMQPRRegisterClass(Inst, RegNo: Qm, Address, Decoder))) |
| 6016 | return MCDisassembler::Fail; |
| 6017 | } |
| 6018 | |
| 6019 | if (!Check(Out&: S, In: predicate_decoder(Inst, fc, Address, Decoder))) |
| 6020 | return MCDisassembler::Fail; |
| 6021 | |
| 6022 | Check(Out&: S, In: DecodeVpredNOperand(Inst, Decoder)); |
| 6023 | return S; |
| 6024 | } |
| 6025 | |
| 6026 | static DecodeStatus DecodeMveVCTP(MCInst &Inst, unsigned Insn, uint64_t Address, |
| 6027 | const MCDisassembler *Decoder) { |
| 6028 | DecodeStatus S = MCDisassembler::Success; |
| 6029 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::VPR)); |
| 6030 | unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 6031 | if (!Check(Out&: S, In: DecoderGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 6032 | return MCDisassembler::Fail; |
| 6033 | Check(Out&: S, In: DecodeVpredNOperand(Inst, Decoder)); |
| 6034 | return S; |
| 6035 | } |
| 6036 | |
| 6037 | static DecodeStatus DecodeMVEVPNOT(MCInst &Inst, unsigned Insn, |
| 6038 | uint64_t Address, |
| 6039 | const MCDisassembler *Decoder) { |
| 6040 | DecodeStatus S = MCDisassembler::Success; |
| 6041 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::VPR)); |
| 6042 | Inst.addOperand(Op: MCOperand::createReg(Reg: ARM::VPR)); |
| 6043 | Check(Out&: S, In: DecodeVpredNOperand(Inst, Decoder)); |
| 6044 | return S; |
| 6045 | } |
| 6046 | |
| 6047 | static DecodeStatus DecodeT2AddSubSPImm(MCInst &Inst, unsigned Insn, |
| 6048 | uint64_t Address, |
| 6049 | const MCDisassembler *Decoder) { |
| 6050 | const unsigned Rd = fieldFromInstruction(Insn, StartBit: 8, NumBits: 4); |
| 6051 | const unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 6052 | const unsigned Imm12 = fieldFromInstruction(Insn, StartBit: 26, NumBits: 1) << 11 | |
| 6053 | fieldFromInstruction(Insn, StartBit: 12, NumBits: 3) << 8 | |
| 6054 | fieldFromInstruction(Insn, StartBit: 0, NumBits: 8); |
| 6055 | const unsigned TypeT3 = fieldFromInstruction(Insn, StartBit: 25, NumBits: 1); |
| 6056 | unsigned sign1 = fieldFromInstruction(Insn, StartBit: 21, NumBits: 1); |
| 6057 | unsigned sign2 = fieldFromInstruction(Insn, StartBit: 23, NumBits: 1); |
| 6058 | unsigned S = fieldFromInstruction(Insn, StartBit: 20, NumBits: 1); |
| 6059 | if (sign1 != sign2) |
| 6060 | return MCDisassembler::Fail; |
| 6061 | |
| 6062 | // T3 does a zext of imm12, where T2 does a ThumbExpandImm (T2SOImm) |
| 6063 | DecodeStatus DS = MCDisassembler::Success; |
| 6064 | if ((!Check(Out&: DS, |
| 6065 | In: DecodeGPRspRegisterClass(Inst, RegNo: Rd, Address, Decoder))) || // dst |
| 6066 | (!Check(Out&: DS, In: DecodeGPRspRegisterClass(Inst, RegNo: Rn, Address, Decoder)))) |
| 6067 | return MCDisassembler::Fail; |
| 6068 | if (TypeT3) { |
| 6069 | Inst.setOpcode(sign1 ? ARM::t2SUBspImm12 : ARM::t2ADDspImm12); |
| 6070 | Inst.addOperand(Op: MCOperand::createImm(Val: Imm12)); // zext imm12 |
| 6071 | DecodePredicateOperand(Inst, Decoder); |
| 6072 | } else { |
| 6073 | Inst.setOpcode(sign1 ? ARM::t2SUBspImm : ARM::t2ADDspImm); |
| 6074 | if (!Check(Out&: DS, In: DecodeT2SOImm(Inst, Val: Imm12, Address, Decoder))) // imm12 |
| 6075 | return MCDisassembler::Fail; |
| 6076 | DecodePredicateOperand(Inst, Decoder); |
| 6077 | if (!Check(Out&: DS, In: DecodeCCOutOperand(Inst, Val: S, Address, Decoder))) // cc_out |
| 6078 | return MCDisassembler::Fail; |
| 6079 | } |
| 6080 | |
| 6081 | return DS; |
| 6082 | } |
| 6083 | |
| 6084 | static DecodeStatus DecodeLazyLoadStoreMul(MCInst &Inst, unsigned Insn, |
| 6085 | uint64_t Address, |
| 6086 | const MCDisassembler *Decoder) { |
| 6087 | DecodeStatus S = MCDisassembler::Success; |
| 6088 | |
| 6089 | const unsigned Rn = fieldFromInstruction(Insn, StartBit: 16, NumBits: 4); |
| 6090 | // Adding Rn, holding memory location to save/load to/from, the only argument |
| 6091 | // that is being encoded. |
| 6092 | // '$Rn' in the assembly. |
| 6093 | if (!Check(Out&: S, In: DecodeGPRRegisterClass(Inst, RegNo: Rn, Address, Decoder))) |
| 6094 | return MCDisassembler::Fail; |
| 6095 | // An optional predicate, '$p' in the assembly. |
| 6096 | DecodePredicateOperand(Inst, Decoder); |
| 6097 | // An immediate that represents a floating point registers list. '$regs' in |
| 6098 | // the assembly. |
| 6099 | Inst.addOperand(Op: MCOperand::createImm(Val: 0)); // Arbitrary value, has no effect. |
| 6100 | |
| 6101 | return S; |
| 6102 | } |
| 6103 | |
| 6104 | #include "ARMGenDisassemblerTables.inc" |
| 6105 | |
| 6106 | // Post-decoding checks |
| 6107 | static DecodeStatus checkDecodedInstruction(MCInst &MI, uint64_t &Size, |
| 6108 | uint64_t Address, raw_ostream &CS, |
| 6109 | uint32_t Insn, |
| 6110 | DecodeStatus Result) { |
| 6111 | switch (MI.getOpcode()) { |
| 6112 | case ARM::HVC: { |
| 6113 | // HVC is undefined if condition = 0xf otherwise upredictable |
| 6114 | // if condition != 0xe |
| 6115 | uint32_t Cond = (Insn >> 28) & 0xF; |
| 6116 | if (Cond == 0xF) |
| 6117 | return MCDisassembler::Fail; |
| 6118 | if (Cond != 0xE) |
| 6119 | return MCDisassembler::SoftFail; |
| 6120 | return Result; |
| 6121 | } |
| 6122 | case ARM::t2ADDri: |
| 6123 | case ARM::t2ADDri12: |
| 6124 | case ARM::t2ADDrr: |
| 6125 | case ARM::t2ADDrs: |
| 6126 | case ARM::t2SUBri: |
| 6127 | case ARM::t2SUBri12: |
| 6128 | case ARM::t2SUBrr: |
| 6129 | case ARM::t2SUBrs: |
| 6130 | if (MI.getOperand(i: 0).getReg() == ARM::SP && |
| 6131 | MI.getOperand(i: 1).getReg() != ARM::SP) |
| 6132 | return MCDisassembler::SoftFail; |
| 6133 | return Result; |
| 6134 | default: return Result; |
| 6135 | } |
| 6136 | } |
| 6137 | |
| 6138 | uint64_t ARMDisassembler::suggestBytesToSkip(ArrayRef<uint8_t> Bytes, |
| 6139 | uint64_t Address) const { |
| 6140 | // In Arm state, instructions are always 4 bytes wide, so there's no |
| 6141 | // point in skipping any smaller number of bytes if an instruction |
| 6142 | // can't be decoded. |
| 6143 | if (!STI.hasFeature(Feature: ARM::ModeThumb)) |
| 6144 | return 4; |
| 6145 | |
| 6146 | // In a Thumb instruction stream, a halfword is a standalone 2-byte |
| 6147 | // instruction if and only if its value is less than 0xE800. |
| 6148 | // Otherwise, it's the first halfword of a 4-byte instruction. |
| 6149 | // |
| 6150 | // So, if we can see the upcoming halfword, we can judge on that |
| 6151 | // basis, and maybe skip a whole 4-byte instruction that we don't |
| 6152 | // know how to decode, without accidentally trying to interpret its |
| 6153 | // second half as something else. |
| 6154 | // |
| 6155 | // If we don't have the instruction data available, we just have to |
| 6156 | // recommend skipping the minimum sensible distance, which is 2 |
| 6157 | // bytes. |
| 6158 | if (Bytes.size() < 2) |
| 6159 | return 2; |
| 6160 | |
| 6161 | uint16_t Insn16 = llvm::support::endian::read<uint16_t>( |
| 6162 | memory: Bytes.data(), endian: InstructionEndianness); |
| 6163 | return Insn16 < 0xE800 ? 2 : 4; |
| 6164 | } |
| 6165 | |
| 6166 | DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size, |
| 6167 | ArrayRef<uint8_t> Bytes, |
| 6168 | uint64_t Address, |
| 6169 | raw_ostream &CS) const { |
| 6170 | DecodeStatus S; |
| 6171 | if (STI.hasFeature(Feature: ARM::ModeThumb)) |
| 6172 | S = getThumbInstruction(Instr&: MI, Size, Bytes, Address, CStream&: CS); |
| 6173 | else |
| 6174 | S = getARMInstruction(Instr&: MI, Size, Bytes, Address, CStream&: CS); |
| 6175 | if (S == DecodeStatus::Fail) |
| 6176 | return S; |
| 6177 | |
| 6178 | // Verify that the decoded instruction has the correct number of operands. |
| 6179 | const MCInstrDesc &MCID = MCII->get(Opcode: MI.getOpcode()); |
| 6180 | if (!MCID.isVariadic() && MI.getNumOperands() != MCID.getNumOperands()) { |
| 6181 | reportFatalInternalError(reason: MCII->getName(Opcode: MI.getOpcode()) + ": expected " + |
| 6182 | Twine(MCID.getNumOperands()) + " operands, got " + |
| 6183 | Twine(MI.getNumOperands()) + "\n" ); |
| 6184 | } |
| 6185 | |
| 6186 | return S; |
| 6187 | } |
| 6188 | |
| 6189 | DecodeStatus ARMDisassembler::getARMInstruction(MCInst &MI, uint64_t &Size, |
| 6190 | ArrayRef<uint8_t> Bytes, |
| 6191 | uint64_t Address, |
| 6192 | raw_ostream &CS) const { |
| 6193 | CommentStream = &CS; |
| 6194 | |
| 6195 | assert(!STI.hasFeature(ARM::ModeThumb) && |
| 6196 | "Asked to disassemble an ARM instruction but Subtarget is in Thumb " |
| 6197 | "mode!" ); |
| 6198 | |
| 6199 | // We want to read exactly 4 bytes of data. |
| 6200 | if (Bytes.size() < 4) { |
| 6201 | Size = 0; |
| 6202 | return MCDisassembler::Fail; |
| 6203 | } |
| 6204 | |
| 6205 | // Encoded as a 32-bit word in the stream. |
| 6206 | uint32_t Insn = llvm::support::endian::read<uint32_t>(memory: Bytes.data(), |
| 6207 | endian: InstructionEndianness); |
| 6208 | |
| 6209 | // Calling the auto-generated decoder function. |
| 6210 | DecodeStatus Result = |
| 6211 | decodeInstruction(DecodeTable: DecoderTableARM32, MI, insn: Insn, Address, DisAsm: this, STI); |
| 6212 | if (Result != MCDisassembler::Fail) { |
| 6213 | Size = 4; |
| 6214 | return checkDecodedInstruction(MI, Size, Address, CS, Insn, Result); |
| 6215 | } |
| 6216 | |
| 6217 | const uint8_t *Tables[] = { |
| 6218 | DecoderTableVFP32, DecoderTableVFPV832, |
| 6219 | DecoderTableNEONData32, DecoderTableNEONLoadStore32, |
| 6220 | DecoderTableNEONDup32, DecoderTablev8NEON32, |
| 6221 | DecoderTablev8Crypto32, |
| 6222 | }; |
| 6223 | |
| 6224 | for (const uint8_t *Table : Tables) { |
| 6225 | Result = decodeInstruction(DecodeTable: Table, MI, insn: Insn, Address, DisAsm: this, STI); |
| 6226 | if (Result != MCDisassembler::Fail) { |
| 6227 | Size = 4; |
| 6228 | return Result; |
| 6229 | } |
| 6230 | } |
| 6231 | |
| 6232 | Result = |
| 6233 | decodeInstruction(DecodeTable: DecoderTableCoProc32, MI, insn: Insn, Address, DisAsm: this, STI); |
| 6234 | if (Result != MCDisassembler::Fail) { |
| 6235 | Size = 4; |
| 6236 | return checkDecodedInstruction(MI, Size, Address, CS, Insn, Result); |
| 6237 | } |
| 6238 | |
| 6239 | Size = 4; |
| 6240 | return MCDisassembler::Fail; |
| 6241 | } |
| 6242 | |
| 6243 | bool ARMDisassembler::isVectorPredicable(const MCInst &MI) const { |
| 6244 | const MCInstrDesc &MCID = MCII->get(Opcode: MI.getOpcode()); |
| 6245 | for (unsigned i = 0; i < MCID.NumOperands; ++i) { |
| 6246 | if (ARM::isVpred(op: MCID.operands()[i].OperandType)) |
| 6247 | return true; |
| 6248 | } |
| 6249 | return false; |
| 6250 | } |
| 6251 | |
| 6252 | // Most Thumb instructions don't have explicit predicates in the encoding, |
| 6253 | // but rather get their predicates from IT context. Here, we check that the |
| 6254 | // decoded instruction is allowed to have the decoded predicate and advance |
| 6255 | // IT/VPT block states. |
| 6256 | MCDisassembler::DecodeStatus |
| 6257 | ARMDisassembler::checkThumbPredicate(MCInst &MI) const { |
| 6258 | MCDisassembler::DecodeStatus S = Success; |
| 6259 | |
| 6260 | const FeatureBitset &FeatureBits = getSubtargetInfo().getFeatureBits(); |
| 6261 | |
| 6262 | switch (MI.getOpcode()) { |
| 6263 | case ARM::tBcc: |
| 6264 | case ARM::t2Bcc: |
| 6265 | case ARM::tCBZ: |
| 6266 | case ARM::tCBNZ: |
| 6267 | case ARM::tCPS: |
| 6268 | case ARM::t2CPS3p: |
| 6269 | case ARM::t2CPS2p: |
| 6270 | case ARM::t2CPS1p: |
| 6271 | case ARM::t2CSEL: |
| 6272 | case ARM::t2CSINC: |
| 6273 | case ARM::t2CSINV: |
| 6274 | case ARM::t2CSNEG: |
| 6275 | case ARM::tMOVSr: |
| 6276 | case ARM::tSETEND: |
| 6277 | // Some instructions (mostly conditional branches) are not |
| 6278 | // allowed in IT blocks. |
| 6279 | if (ITBlock.instrInITBlock()) |
| 6280 | S = SoftFail; |
| 6281 | else |
| 6282 | return Success; |
| 6283 | break; |
| 6284 | case ARM::t2HINT: |
| 6285 | if (MI.getOperand(i: 0).getImm() == 0x10 && (FeatureBits[ARM::FeatureRAS]) != 0) |
| 6286 | S = SoftFail; |
| 6287 | break; |
| 6288 | case ARM::tB: |
| 6289 | case ARM::t2B: |
| 6290 | case ARM::t2TBB: |
| 6291 | case ARM::t2TBH: |
| 6292 | // Some instructions (mostly unconditional branches) can |
| 6293 | // only appears at the end of, or outside of, an IT. |
| 6294 | if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock()) |
| 6295 | S = SoftFail; |
| 6296 | break; |
| 6297 | default: |
| 6298 | break; |
| 6299 | } |
| 6300 | |
| 6301 | // Warn on non-VPT predicable instruction in a VPT block and a VPT |
| 6302 | // predicable instruction in an IT block |
| 6303 | if ((!isVectorPredicable(MI) && VPTBlock.instrInVPTBlock()) || |
| 6304 | (isVectorPredicable(MI) && ITBlock.instrInITBlock())) |
| 6305 | S = SoftFail; |
| 6306 | |
| 6307 | if (ITBlock.instrInITBlock()) |
| 6308 | ITBlock.advanceITState(); |
| 6309 | else if (VPTBlock.instrInVPTBlock()) |
| 6310 | VPTBlock.advanceVPTState(); |
| 6311 | |
| 6312 | return S; |
| 6313 | } |
| 6314 | |
| 6315 | // Thumb VFP and some NEON instructions are a special case. Because we share |
| 6316 | // their encodings between ARM and Thumb modes, and they are predicable in ARM |
| 6317 | // mode, the auto-generated decoder will give them an (incorrect) |
| 6318 | // predicate operand. We need to rewrite these operands based on the IT |
| 6319 | // context as a post-pass. |
| 6320 | void ARMDisassembler::UpdateThumbPredicate(DecodeStatus &S, MCInst &MI) const { |
| 6321 | unsigned CC; |
| 6322 | CC = ITBlock.getITCC(); |
| 6323 | if (CC == 0xF) |
| 6324 | CC = ARMCC::AL; |
| 6325 | if (ITBlock.instrInITBlock()) |
| 6326 | ITBlock.advanceITState(); |
| 6327 | else if (VPTBlock.instrInVPTBlock()) { |
| 6328 | CC = VPTBlock.getVPTPred(); |
| 6329 | VPTBlock.advanceVPTState(); |
| 6330 | } |
| 6331 | |
| 6332 | const MCInstrDesc &MCID = MCII->get(Opcode: MI.getOpcode()); |
| 6333 | ArrayRef<MCOperandInfo> OpInfo = MCID.operands(); |
| 6334 | MCInst::iterator I = MI.begin(); |
| 6335 | unsigned short NumOps = MCID.NumOperands; |
| 6336 | for (unsigned i = 0; i < NumOps; ++i, ++I) { |
| 6337 | if (OpInfo[i].isPredicate() ) { |
| 6338 | if (CC != ARMCC::AL && !MCID.isPredicable()) |
| 6339 | Check(Out&: S, In: SoftFail); |
| 6340 | I->setImm(CC); |
| 6341 | ++I; |
| 6342 | if (CC == ARMCC::AL) |
| 6343 | I->setReg(ARM::NoRegister); |
| 6344 | else |
| 6345 | I->setReg(ARM::CPSR); |
| 6346 | return; |
| 6347 | } |
| 6348 | } |
| 6349 | } |
| 6350 | |
| 6351 | DecodeStatus ARMDisassembler::getThumbInstruction(MCInst &MI, uint64_t &Size, |
| 6352 | ArrayRef<uint8_t> Bytes, |
| 6353 | uint64_t Address, |
| 6354 | raw_ostream &CS) const { |
| 6355 | CommentStream = &CS; |
| 6356 | |
| 6357 | assert(STI.hasFeature(ARM::ModeThumb) && |
| 6358 | "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!" ); |
| 6359 | |
| 6360 | // We want to read exactly 2 bytes of data. |
| 6361 | if (Bytes.size() < 2) { |
| 6362 | Size = 0; |
| 6363 | return MCDisassembler::Fail; |
| 6364 | } |
| 6365 | |
| 6366 | uint16_t Insn16 = llvm::support::endian::read<uint16_t>( |
| 6367 | memory: Bytes.data(), endian: InstructionEndianness); |
| 6368 | DecodeStatus Result = |
| 6369 | decodeInstruction(DecodeTable: DecoderTableThumb16, MI, insn: Insn16, Address, DisAsm: this, STI); |
| 6370 | if (Result != MCDisassembler::Fail) { |
| 6371 | Size = 2; |
| 6372 | Check(Out&: Result, In: checkThumbPredicate(MI)); |
| 6373 | return Result; |
| 6374 | } |
| 6375 | |
| 6376 | Result = decodeInstruction(DecodeTable: DecoderTableThumbSBit16, MI, insn: Insn16, Address, DisAsm: this, |
| 6377 | STI); |
| 6378 | if (Result) { |
| 6379 | Size = 2; |
| 6380 | Check(Out&: Result, In: checkThumbPredicate(MI)); |
| 6381 | return Result; |
| 6382 | } |
| 6383 | |
| 6384 | Result = |
| 6385 | decodeInstruction(DecodeTable: DecoderTableThumb216, MI, insn: Insn16, Address, DisAsm: this, STI); |
| 6386 | if (Result != MCDisassembler::Fail) { |
| 6387 | Size = 2; |
| 6388 | |
| 6389 | // Nested IT blocks are UNPREDICTABLE. Must be checked before we add |
| 6390 | // the Thumb predicate. |
| 6391 | if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock()) |
| 6392 | Result = MCDisassembler::SoftFail; |
| 6393 | |
| 6394 | Check(Out&: Result, In: checkThumbPredicate(MI)); |
| 6395 | |
| 6396 | // If we find an IT instruction, we need to parse its condition |
| 6397 | // code and mask operands so that we can apply them correctly |
| 6398 | // to the subsequent instructions. |
| 6399 | if (MI.getOpcode() == ARM::t2IT) { |
| 6400 | unsigned Firstcond = MI.getOperand(i: 0).getImm(); |
| 6401 | unsigned Mask = MI.getOperand(i: 1).getImm(); |
| 6402 | ITBlock.setITState(Firstcond, Mask); |
| 6403 | |
| 6404 | // An IT instruction that would give a 'NV' predicate is unpredictable. |
| 6405 | if (Firstcond == ARMCC::AL && !isPowerOf2_32(Value: Mask)) |
| 6406 | CS << "unpredictable IT predicate sequence" ; |
| 6407 | } |
| 6408 | |
| 6409 | return Result; |
| 6410 | } |
| 6411 | |
| 6412 | // We want to read exactly 4 bytes of data. |
| 6413 | if (Bytes.size() < 4) { |
| 6414 | Size = 0; |
| 6415 | return MCDisassembler::Fail; |
| 6416 | } |
| 6417 | |
| 6418 | uint32_t Insn32 = |
| 6419 | (uint32_t(Insn16) << 16) | llvm::support::endian::read<uint16_t>( |
| 6420 | memory: Bytes.data() + 2, endian: InstructionEndianness); |
| 6421 | |
| 6422 | Result = |
| 6423 | decodeInstruction(DecodeTable: DecoderTableMVE32, MI, insn: Insn32, Address, DisAsm: this, STI); |
| 6424 | if (Result != MCDisassembler::Fail) { |
| 6425 | Size = 4; |
| 6426 | |
| 6427 | // Nested VPT blocks are UNPREDICTABLE. Must be checked before we add |
| 6428 | // the VPT predicate. |
| 6429 | if (isVPTOpcode(Opc: MI.getOpcode()) && VPTBlock.instrInVPTBlock()) |
| 6430 | Result = MCDisassembler::SoftFail; |
| 6431 | |
| 6432 | Check(Out&: Result, In: checkThumbPredicate(MI)); |
| 6433 | |
| 6434 | if (isVPTOpcode(Opc: MI.getOpcode())) { |
| 6435 | unsigned Mask = MI.getOperand(i: 0).getImm(); |
| 6436 | VPTBlock.setVPTState(Mask); |
| 6437 | } |
| 6438 | |
| 6439 | return Result; |
| 6440 | } |
| 6441 | |
| 6442 | Result = |
| 6443 | decodeInstruction(DecodeTable: DecoderTableThumb32, MI, insn: Insn32, Address, DisAsm: this, STI); |
| 6444 | if (Result != MCDisassembler::Fail) { |
| 6445 | Size = 4; |
| 6446 | Check(Out&: Result, In: checkThumbPredicate(MI)); |
| 6447 | return Result; |
| 6448 | } |
| 6449 | |
| 6450 | Result = |
| 6451 | decodeInstruction(DecodeTable: DecoderTableThumb232, MI, insn: Insn32, Address, DisAsm: this, STI); |
| 6452 | if (Result != MCDisassembler::Fail) { |
| 6453 | Size = 4; |
| 6454 | Check(Out&: Result, In: checkThumbPredicate(MI)); |
| 6455 | return checkDecodedInstruction(MI, Size, Address, CS, Insn: Insn32, Result); |
| 6456 | } |
| 6457 | |
| 6458 | if (fieldFromInstruction(Insn: Insn32, StartBit: 28, NumBits: 4) == 0xE) { |
| 6459 | Result = |
| 6460 | decodeInstruction(DecodeTable: DecoderTableVFP32, MI, insn: Insn32, Address, DisAsm: this, STI); |
| 6461 | if (Result != MCDisassembler::Fail) { |
| 6462 | Size = 4; |
| 6463 | UpdateThumbPredicate(S&: Result, MI); |
| 6464 | return Result; |
| 6465 | } |
| 6466 | } |
| 6467 | |
| 6468 | Result = |
| 6469 | decodeInstruction(DecodeTable: DecoderTableVFPV832, MI, insn: Insn32, Address, DisAsm: this, STI); |
| 6470 | if (Result != MCDisassembler::Fail) { |
| 6471 | Size = 4; |
| 6472 | return Result; |
| 6473 | } |
| 6474 | |
| 6475 | if (fieldFromInstruction(Insn: Insn32, StartBit: 28, NumBits: 4) == 0xE) { |
| 6476 | Result = decodeInstruction(DecodeTable: DecoderTableNEONDup32, MI, insn: Insn32, Address, DisAsm: this, |
| 6477 | STI); |
| 6478 | if (Result != MCDisassembler::Fail) { |
| 6479 | Size = 4; |
| 6480 | UpdateThumbPredicate(S&: Result, MI); |
| 6481 | return Result; |
| 6482 | } |
| 6483 | } |
| 6484 | |
| 6485 | if (fieldFromInstruction(Insn: Insn32, StartBit: 24, NumBits: 8) == 0xF9) { |
| 6486 | uint32_t NEONLdStInsn = Insn32; |
| 6487 | NEONLdStInsn &= 0xF0FFFFFF; |
| 6488 | NEONLdStInsn |= 0x04000000; |
| 6489 | Result = decodeInstruction(DecodeTable: DecoderTableNEONLoadStore32, MI, insn: NEONLdStInsn, |
| 6490 | Address, DisAsm: this, STI); |
| 6491 | if (Result != MCDisassembler::Fail) { |
| 6492 | Size = 4; |
| 6493 | Check(Out&: Result, In: checkThumbPredicate(MI)); |
| 6494 | return Result; |
| 6495 | } |
| 6496 | } |
| 6497 | |
| 6498 | if (fieldFromInstruction(Insn: Insn32, StartBit: 24, NumBits: 4) == 0xF) { |
| 6499 | uint32_t NEONDataInsn = Insn32; |
| 6500 | NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24 |
| 6501 | NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24 |
| 6502 | NEONDataInsn |= 0x12000000; // Set bits 28 and 25 |
| 6503 | Result = decodeInstruction(DecodeTable: DecoderTableNEONData32, MI, insn: NEONDataInsn, |
| 6504 | Address, DisAsm: this, STI); |
| 6505 | if (Result != MCDisassembler::Fail) { |
| 6506 | Size = 4; |
| 6507 | Check(Out&: Result, In: checkThumbPredicate(MI)); |
| 6508 | return Result; |
| 6509 | } |
| 6510 | |
| 6511 | uint32_t NEONCryptoInsn = Insn32; |
| 6512 | NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24 |
| 6513 | NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >> 4; // Move bit 28 to bit 24 |
| 6514 | NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25 |
| 6515 | Result = decodeInstruction(DecodeTable: DecoderTablev8Crypto32, MI, insn: NEONCryptoInsn, |
| 6516 | Address, DisAsm: this, STI); |
| 6517 | if (Result != MCDisassembler::Fail) { |
| 6518 | Size = 4; |
| 6519 | return Result; |
| 6520 | } |
| 6521 | |
| 6522 | uint32_t NEONv8Insn = Insn32; |
| 6523 | NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26 |
| 6524 | Result = decodeInstruction(DecodeTable: DecoderTablev8NEON32, MI, insn: NEONv8Insn, Address, |
| 6525 | DisAsm: this, STI); |
| 6526 | if (Result != MCDisassembler::Fail) { |
| 6527 | Size = 4; |
| 6528 | return Result; |
| 6529 | } |
| 6530 | } |
| 6531 | |
| 6532 | uint32_t Coproc = fieldFromInstruction(Insn: Insn32, StartBit: 8, NumBits: 4); |
| 6533 | const uint8_t *DecoderTable = ARM::isCDECoproc(Coproc, STI) |
| 6534 | ? DecoderTableThumb2CDE32 |
| 6535 | : DecoderTableThumb2CoProc32; |
| 6536 | Result = |
| 6537 | decodeInstruction(DecodeTable: DecoderTable, MI, insn: Insn32, Address, DisAsm: this, STI); |
| 6538 | if (Result != MCDisassembler::Fail) { |
| 6539 | Size = 4; |
| 6540 | Check(Out&: Result, In: checkThumbPredicate(MI)); |
| 6541 | return Result; |
| 6542 | } |
| 6543 | |
| 6544 | // Advance IT state to prevent next instruction inheriting |
| 6545 | // the wrong IT state. |
| 6546 | if (ITBlock.instrInITBlock()) |
| 6547 | ITBlock.advanceITState(); |
| 6548 | Size = 0; |
| 6549 | return MCDisassembler::Fail; |
| 6550 | } |
| 6551 | |
| 6552 | static MCDisassembler *createARMDisassembler(const Target &T, |
| 6553 | const MCSubtargetInfo &STI, |
| 6554 | MCContext &Ctx) { |
| 6555 | return new ARMDisassembler(STI, Ctx, T.createMCInstrInfo()); |
| 6556 | } |
| 6557 | |
| 6558 | extern "C" LLVM_ABI LLVM_EXTERNAL_VISIBILITY void |
| 6559 | LLVMInitializeARMDisassembler() { |
| 6560 | TargetRegistry::RegisterMCDisassembler(T&: getTheARMLETarget(), |
| 6561 | Fn: createARMDisassembler); |
| 6562 | TargetRegistry::RegisterMCDisassembler(T&: getTheARMBETarget(), |
| 6563 | Fn: createARMDisassembler); |
| 6564 | TargetRegistry::RegisterMCDisassembler(T&: getTheThumbLETarget(), |
| 6565 | Fn: createARMDisassembler); |
| 6566 | TargetRegistry::RegisterMCDisassembler(T&: getTheThumbBETarget(), |
| 6567 | Fn: createARMDisassembler); |
| 6568 | } |
| 6569 | |