1 //===- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA -----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #define DEBUG_TYPE "arm-disassembler" 11 12 #include "ARM.h" 13 #include "ARMRegisterInfo.h" 14 #include "ARMSubtarget.h" 15 #include "MCTargetDesc/ARMAddressingModes.h" 16 #include "MCTargetDesc/ARMMCExpr.h" 17 #include "MCTargetDesc/ARMBaseInfo.h" 18 #include "llvm/MC/EDInstInfo.h" 19 #include "llvm/MC/MCInst.h" 20 #include "llvm/MC/MCExpr.h" 21 #include "llvm/MC/MCContext.h" 22 #include "llvm/MC/MCDisassembler.h" 23 #include "llvm/Support/Debug.h" 24 #include "llvm/Support/MemoryObject.h" 25 #include "llvm/Support/ErrorHandling.h" 26 #include "llvm/Support/TargetRegistry.h" 27 #include "llvm/Support/raw_ostream.h" 28 29 using namespace llvm; 30 31 typedef MCDisassembler::DecodeStatus DecodeStatus; 32 33 namespace { 34 /// ARMDisassembler - ARM disassembler for all ARM platforms. 35 class ARMDisassembler : public MCDisassembler { 36 public: 37 /// Constructor - Initializes the disassembler. 38 /// 39 ARMDisassembler(const MCSubtargetInfo &STI) : 40 MCDisassembler(STI) { 41 } 42 43 ~ARMDisassembler() { 44 } 45 46 /// getInstruction - See MCDisassembler. 47 DecodeStatus getInstruction(MCInst &instr, 48 uint64_t &size, 49 const MemoryObject ®ion, 50 uint64_t address, 51 raw_ostream &vStream, 52 raw_ostream &cStream) const; 53 54 /// getEDInfo - See MCDisassembler. 55 EDInstInfo *getEDInfo() const; 56 private: 57 }; 58 59 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms. 60 class ThumbDisassembler : public MCDisassembler { 61 public: 62 /// Constructor - Initializes the disassembler. 63 /// 64 ThumbDisassembler(const MCSubtargetInfo &STI) : 65 MCDisassembler(STI) { 66 } 67 68 ~ThumbDisassembler() { 69 } 70 71 /// getInstruction - See MCDisassembler. 72 DecodeStatus getInstruction(MCInst &instr, 73 uint64_t &size, 74 const MemoryObject ®ion, 75 uint64_t address, 76 raw_ostream &vStream, 77 raw_ostream &cStream) const; 78 79 /// getEDInfo - See MCDisassembler. 80 EDInstInfo *getEDInfo() const; 81 private: 82 mutable std::vector<unsigned> ITBlock; 83 DecodeStatus AddThumbPredicate(MCInst&) const; 84 void UpdateThumbVFPPredicate(MCInst&) const; 85 }; 86 } 87 88 static bool Check(DecodeStatus &Out, DecodeStatus In) { 89 switch (In) { 90 case MCDisassembler::Success: 91 // Out stays the same. 92 return true; 93 case MCDisassembler::SoftFail: 94 Out = In; 95 return true; 96 case MCDisassembler::Fail: 97 Out = In; 98 return false; 99 } 100 return false; 101 } 102 103 104 // Forward declare these because the autogenerated code will reference them. 105 // Definitions are further down. 106 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 107 uint64_t Address, const void *Decoder); 108 static DecodeStatus DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, 109 unsigned RegNo, uint64_t Address, 110 const void *Decoder); 111 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 112 uint64_t Address, const void *Decoder); 113 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 114 uint64_t Address, const void *Decoder); 115 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 116 uint64_t Address, const void *Decoder); 117 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 118 uint64_t Address, const void *Decoder); 119 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 120 uint64_t Address, const void *Decoder); 121 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo, 122 uint64_t Address, const void *Decoder); 123 static DecodeStatus DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, 124 unsigned RegNo, 125 uint64_t Address, 126 const void *Decoder); 127 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 128 uint64_t Address, const void *Decoder); 129 130 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val, 131 uint64_t Address, const void *Decoder); 132 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val, 133 uint64_t Address, const void *Decoder); 134 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val, 135 uint64_t Address, const void *Decoder); 136 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val, 137 uint64_t Address, const void *Decoder); 138 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val, 139 uint64_t Address, const void *Decoder); 140 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val, 141 uint64_t Address, const void *Decoder); 142 143 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Insn, 144 uint64_t Address, const void *Decoder); 145 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn, 146 uint64_t Address, const void *Decoder); 147 static DecodeStatus DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, 148 unsigned Insn, 149 uint64_t Address, 150 const void *Decoder); 151 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Insn, 152 uint64_t Address, const void *Decoder); 153 static DecodeStatus DecodeAddrMode3Instruction(llvm::MCInst &Inst,unsigned Insn, 154 uint64_t Address, const void *Decoder); 155 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Insn, 156 uint64_t Address, const void *Decoder); 157 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Insn, 158 uint64_t Address, const void *Decoder); 159 160 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst & Inst, 161 unsigned Insn, 162 uint64_t Adddress, 163 const void *Decoder); 164 static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn, 165 uint64_t Address, const void *Decoder); 166 static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn, 167 uint64_t Address, const void *Decoder); 168 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn, 169 uint64_t Address, const void *Decoder); 170 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn, 171 uint64_t Address, const void *Decoder); 172 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn, 173 uint64_t Address, const void *Decoder); 174 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val, 175 uint64_t Address, const void *Decoder); 176 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val, 177 uint64_t Address, const void *Decoder); 178 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val, 179 uint64_t Address, const void *Decoder); 180 static DecodeStatus DecodeBranchImmInstruction(llvm::MCInst &Inst,unsigned Insn, 181 uint64_t Address, const void *Decoder); 182 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val, 183 uint64_t Address, const void *Decoder); 184 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val, 185 uint64_t Address, const void *Decoder); 186 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Val, 187 uint64_t Address, const void *Decoder); 188 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Val, 189 uint64_t Address, const void *Decoder); 190 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Val, 191 uint64_t Address, const void *Decoder); 192 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Val, 193 uint64_t Address, const void *Decoder); 194 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Val, 195 uint64_t Address, const void *Decoder); 196 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Val, 197 uint64_t Address, const void *Decoder); 198 static DecodeStatus DecodeNEONModImmInstruction(llvm::MCInst &Inst,unsigned Val, 199 uint64_t Address, const void *Decoder); 200 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Val, 201 uint64_t Address, const void *Decoder); 202 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val, 203 uint64_t Address, const void *Decoder); 204 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val, 205 uint64_t Address, const void *Decoder); 206 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val, 207 uint64_t Address, const void *Decoder); 208 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val, 209 uint64_t Address, const void *Decoder); 210 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn, 211 uint64_t Address, const void *Decoder); 212 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn, 213 uint64_t Address, const void *Decoder); 214 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Insn, 215 uint64_t Address, const void *Decoder); 216 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn, 217 uint64_t Address, const void *Decoder); 218 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn, 219 uint64_t Address, const void *Decoder); 220 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn, 221 uint64_t Address, const void *Decoder); 222 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn, 223 uint64_t Address, const void *Decoder); 224 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn, 225 uint64_t Address, const void *Decoder); 226 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn, 227 uint64_t Address, const void *Decoder); 228 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn, 229 uint64_t Address, const void *Decoder); 230 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn, 231 uint64_t Address, const void *Decoder); 232 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn, 233 uint64_t Address, const void *Decoder); 234 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn, 235 uint64_t Address, const void *Decoder); 236 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn, 237 uint64_t Address, const void *Decoder); 238 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn, 239 uint64_t Address, const void *Decoder); 240 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn, 241 uint64_t Address, const void *Decoder); 242 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn, 243 uint64_t Address, const void *Decoder); 244 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn, 245 uint64_t Address, const void *Decoder); 246 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn, 247 uint64_t Address, const void *Decoder); 248 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn, 249 uint64_t Address, const void *Decoder); 250 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn, 251 uint64_t Address, const void *Decoder); 252 253 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn, 254 uint64_t Address, const void *Decoder); 255 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val, 256 uint64_t Address, const void *Decoder); 257 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val, 258 uint64_t Address, const void *Decoder); 259 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val, 260 uint64_t Address, const void *Decoder); 261 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val, 262 uint64_t Address, const void *Decoder); 263 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val, 264 uint64_t Address, const void *Decoder); 265 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val, 266 uint64_t Address, const void *Decoder); 267 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val, 268 uint64_t Address, const void *Decoder); 269 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val, 270 uint64_t Address, const void *Decoder); 271 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val, 272 uint64_t Address, const void *Decoder); 273 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val, 274 uint64_t Address, const void *Decoder); 275 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val, 276 uint64_t Address, const void *Decoder); 277 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val, 278 uint64_t Address, const void *Decoder); 279 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val, 280 uint64_t Address, const void *Decoder); 281 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val, 282 uint64_t Address, const void *Decoder); 283 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val, 284 uint64_t Address, const void *Decoder); 285 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn, 286 uint64_t Address, const void *Decoder); 287 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn, 288 uint64_t Address, const void *Decoder); 289 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn, 290 uint64_t Address, const void *Decoder); 291 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val, 292 uint64_t Address, const void *Decoder); 293 static DecodeStatus DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Val, 294 uint64_t Address, const void *Decoder); 295 static DecodeStatus DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val, 296 uint64_t Address, const void *Decoder); 297 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val, 298 uint64_t Address, const void *Decoder); 299 static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val, 300 uint64_t Address, const void *Decoder); 301 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val, 302 uint64_t Address, const void *Decoder); 303 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Val, 304 uint64_t Address, const void *Decoder); 305 static DecodeStatus DecodeT2LDRDPreInstruction(llvm::MCInst &Inst,unsigned Insn, 306 uint64_t Address, const void *Decoder); 307 static DecodeStatus DecodeT2STRDPreInstruction(llvm::MCInst &Inst,unsigned Insn, 308 uint64_t Address, const void *Decoder); 309 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, unsigned Val, 310 uint64_t Address, const void *Decoder); 311 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Val, 312 uint64_t Address, const void *Decoder); 313 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, unsigned Val, 314 uint64_t Address, const void *Decoder); 315 316 317 318 #include "ARMGenDisassemblerTables.inc" 319 #include "ARMGenInstrInfo.inc" 320 #include "ARMGenEDInfo.inc" 321 322 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) { 323 return new ARMDisassembler(STI); 324 } 325 326 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) { 327 return new ThumbDisassembler(STI); 328 } 329 330 EDInstInfo *ARMDisassembler::getEDInfo() const { 331 return instInfoARM; 332 } 333 334 EDInstInfo *ThumbDisassembler::getEDInfo() const { 335 return instInfoARM; 336 } 337 338 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size, 339 const MemoryObject &Region, 340 uint64_t Address, 341 raw_ostream &os, 342 raw_ostream &cs) const { 343 CommentStream = &cs; 344 345 uint8_t bytes[4]; 346 347 assert(!(STI.getFeatureBits() & ARM::ModeThumb) && 348 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!"); 349 350 // We want to read exactly 4 bytes of data. 351 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) { 352 Size = 0; 353 return MCDisassembler::Fail; 354 } 355 356 // Encoded as a small-endian 32-bit word in the stream. 357 uint32_t insn = (bytes[3] << 24) | 358 (bytes[2] << 16) | 359 (bytes[1] << 8) | 360 (bytes[0] << 0); 361 362 // Calling the auto-generated decoder function. 363 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI); 364 if (result != MCDisassembler::Fail) { 365 Size = 4; 366 return result; 367 } 368 369 // VFP and NEON instructions, similarly, are shared between ARM 370 // and Thumb modes. 371 MI.clear(); 372 result = decodeVFPInstruction32(MI, insn, Address, this, STI); 373 if (result != MCDisassembler::Fail) { 374 Size = 4; 375 return result; 376 } 377 378 MI.clear(); 379 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI); 380 if (result != MCDisassembler::Fail) { 381 Size = 4; 382 // Add a fake predicate operand, because we share these instruction 383 // definitions with Thumb2 where these instructions are predicable. 384 if (!DecodePredicateOperand(MI, 0xE, Address, this)) 385 return MCDisassembler::Fail; 386 return result; 387 } 388 389 MI.clear(); 390 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI); 391 if (result != MCDisassembler::Fail) { 392 Size = 4; 393 // Add a fake predicate operand, because we share these instruction 394 // definitions with Thumb2 where these instructions are predicable. 395 if (!DecodePredicateOperand(MI, 0xE, Address, this)) 396 return MCDisassembler::Fail; 397 return result; 398 } 399 400 MI.clear(); 401 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI); 402 if (result != MCDisassembler::Fail) { 403 Size = 4; 404 // Add a fake predicate operand, because we share these instruction 405 // definitions with Thumb2 where these instructions are predicable. 406 if (!DecodePredicateOperand(MI, 0xE, Address, this)) 407 return MCDisassembler::Fail; 408 return result; 409 } 410 411 MI.clear(); 412 413 Size = 0; 414 return MCDisassembler::Fail; 415 } 416 417 namespace llvm { 418 extern MCInstrDesc ARMInsts[]; 419 } 420 421 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the 422 /// immediate Value in the MCInst. The immediate Value has had any PC 423 /// adjustment made by the caller. If the instruction is a branch instruction 424 /// then isBranch is true, else false. If the getOpInfo() function was set as 425 /// part of the setupForSymbolicDisassembly() call then that function is called 426 /// to get any symbolic information at the Address for this instruction. If 427 /// that returns non-zero then the symbolic information it returns is used to 428 /// create an MCExpr and that is added as an operand to the MCInst. If 429 /// getOpInfo() returns zero and isBranch is true then a symbol look up for 430 /// Value is done and if a symbol is found an MCExpr is created with that, else 431 /// an MCExpr with Value is created. This function returns true if it adds an 432 /// operand to the MCInst and false otherwise. 433 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value, 434 bool isBranch, uint64_t InstSize, 435 MCInst &MI, const void *Decoder) { 436 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder); 437 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback(); 438 if (!getOpInfo) 439 return false; 440 441 struct LLVMOpInfo1 SymbolicOp; 442 SymbolicOp.Value = Value; 443 void *DisInfo = Dis->getDisInfoBlock(); 444 if (!getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) { 445 if (isBranch) { 446 LLVMSymbolLookupCallback SymbolLookUp = 447 Dis->getLLVMSymbolLookupCallback(); 448 if (SymbolLookUp) { 449 uint64_t ReferenceType; 450 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch; 451 const char *ReferenceName; 452 const char *Name = SymbolLookUp(DisInfo, Value, &ReferenceType, Address, 453 &ReferenceName); 454 if (Name) { 455 SymbolicOp.AddSymbol.Name = Name; 456 SymbolicOp.AddSymbol.Present = true; 457 SymbolicOp.Value = 0; 458 } 459 else { 460 SymbolicOp.Value = Value; 461 } 462 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub) 463 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName; 464 } 465 else { 466 return false; 467 } 468 } 469 else { 470 return false; 471 } 472 } 473 474 MCContext *Ctx = Dis->getMCContext(); 475 const MCExpr *Add = NULL; 476 if (SymbolicOp.AddSymbol.Present) { 477 if (SymbolicOp.AddSymbol.Name) { 478 StringRef Name(SymbolicOp.AddSymbol.Name); 479 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name); 480 Add = MCSymbolRefExpr::Create(Sym, *Ctx); 481 } else { 482 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx); 483 } 484 } 485 486 const MCExpr *Sub = NULL; 487 if (SymbolicOp.SubtractSymbol.Present) { 488 if (SymbolicOp.SubtractSymbol.Name) { 489 StringRef Name(SymbolicOp.SubtractSymbol.Name); 490 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name); 491 Sub = MCSymbolRefExpr::Create(Sym, *Ctx); 492 } else { 493 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx); 494 } 495 } 496 497 const MCExpr *Off = NULL; 498 if (SymbolicOp.Value != 0) 499 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx); 500 501 const MCExpr *Expr; 502 if (Sub) { 503 const MCExpr *LHS; 504 if (Add) 505 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx); 506 else 507 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx); 508 if (Off != 0) 509 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx); 510 else 511 Expr = LHS; 512 } else if (Add) { 513 if (Off != 0) 514 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx); 515 else 516 Expr = Add; 517 } else { 518 if (Off != 0) 519 Expr = Off; 520 else 521 Expr = MCConstantExpr::Create(0, *Ctx); 522 } 523 524 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16) 525 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx))); 526 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16) 527 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx))); 528 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None) 529 MI.addOperand(MCOperand::CreateExpr(Expr)); 530 else 531 assert(0 && "bad SymbolicOp.VariantKind"); 532 533 return true; 534 } 535 536 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being 537 /// referenced by a load instruction with the base register that is the Pc. 538 /// These can often be values in a literal pool near the Address of the 539 /// instruction. The Address of the instruction and its immediate Value are 540 /// used as a possible literal pool entry. The SymbolLookUp call back will 541 /// return the name of a symbol referenced by the the literal pool's entry if 542 /// the referenced address is that of a symbol. Or it will return a pointer to 543 /// a literal 'C' string if the referenced address of the literal pool's entry 544 /// is an address into a section with 'C' string literals. 545 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value, 546 const void *Decoder) { 547 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder); 548 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback(); 549 if (SymbolLookUp) { 550 void *DisInfo = Dis->getDisInfoBlock(); 551 uint64_t ReferenceType; 552 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load; 553 const char *ReferenceName; 554 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName); 555 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr || 556 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr) 557 (*Dis->CommentStream) << "literal pool for: " << ReferenceName; 558 } 559 } 560 561 // Thumb1 instructions don't have explicit S bits. Rather, they 562 // implicitly set CPSR. Since it's not represented in the encoding, the 563 // auto-generated decoder won't inject the CPSR operand. We need to fix 564 // that as a post-pass. 565 static void AddThumb1SBit(MCInst &MI, bool InITBlock) { 566 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo; 567 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands; 568 MCInst::iterator I = MI.begin(); 569 for (unsigned i = 0; i < NumOps; ++i, ++I) { 570 if (I == MI.end()) break; 571 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) { 572 if (i > 0 && OpInfo[i-1].isPredicate()) continue; 573 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR)); 574 return; 575 } 576 } 577 578 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR)); 579 } 580 581 // Most Thumb instructions don't have explicit predicates in the 582 // encoding, but rather get their predicates from IT context. We need 583 // to fix up the predicate operands using this context information as a 584 // post-pass. 585 MCDisassembler::DecodeStatus 586 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const { 587 MCDisassembler::DecodeStatus S = Success; 588 589 // A few instructions actually have predicates encoded in them. Don't 590 // try to overwrite it if we're seeing one of those. 591 switch (MI.getOpcode()) { 592 case ARM::tBcc: 593 case ARM::t2Bcc: 594 case ARM::tCBZ: 595 case ARM::tCBNZ: 596 case ARM::tCPS: 597 case ARM::t2CPS3p: 598 case ARM::t2CPS2p: 599 case ARM::t2CPS1p: 600 case ARM::tMOVSr: 601 case ARM::tSETEND: 602 // Some instructions (mostly conditional branches) are not 603 // allowed in IT blocks. 604 if (!ITBlock.empty()) 605 S = SoftFail; 606 else 607 return Success; 608 break; 609 case ARM::tB: 610 case ARM::t2B: 611 case ARM::t2TBB: 612 case ARM::t2TBH: 613 // Some instructions (mostly unconditional branches) can 614 // only appears at the end of, or outside of, an IT. 615 if (ITBlock.size() > 1) 616 S = SoftFail; 617 break; 618 default: 619 break; 620 } 621 622 // If we're in an IT block, base the predicate on that. Otherwise, 623 // assume a predicate of AL. 624 unsigned CC; 625 if (!ITBlock.empty()) { 626 CC = ITBlock.back(); 627 if (CC == 0xF) 628 CC = ARMCC::AL; 629 ITBlock.pop_back(); 630 } else 631 CC = ARMCC::AL; 632 633 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo; 634 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands; 635 MCInst::iterator I = MI.begin(); 636 for (unsigned i = 0; i < NumOps; ++i, ++I) { 637 if (I == MI.end()) break; 638 if (OpInfo[i].isPredicate()) { 639 I = MI.insert(I, MCOperand::CreateImm(CC)); 640 ++I; 641 if (CC == ARMCC::AL) 642 MI.insert(I, MCOperand::CreateReg(0)); 643 else 644 MI.insert(I, MCOperand::CreateReg(ARM::CPSR)); 645 return S; 646 } 647 } 648 649 I = MI.insert(I, MCOperand::CreateImm(CC)); 650 ++I; 651 if (CC == ARMCC::AL) 652 MI.insert(I, MCOperand::CreateReg(0)); 653 else 654 MI.insert(I, MCOperand::CreateReg(ARM::CPSR)); 655 656 return S; 657 } 658 659 // Thumb VFP instructions are a special case. Because we share their 660 // encodings between ARM and Thumb modes, and they are predicable in ARM 661 // mode, the auto-generated decoder will give them an (incorrect) 662 // predicate operand. We need to rewrite these operands based on the IT 663 // context as a post-pass. 664 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const { 665 unsigned CC; 666 if (!ITBlock.empty()) { 667 CC = ITBlock.back(); 668 ITBlock.pop_back(); 669 } else 670 CC = ARMCC::AL; 671 672 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo; 673 MCInst::iterator I = MI.begin(); 674 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands; 675 for (unsigned i = 0; i < NumOps; ++i, ++I) { 676 if (OpInfo[i].isPredicate() ) { 677 I->setImm(CC); 678 ++I; 679 if (CC == ARMCC::AL) 680 I->setReg(0); 681 else 682 I->setReg(ARM::CPSR); 683 return; 684 } 685 } 686 } 687 688 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size, 689 const MemoryObject &Region, 690 uint64_t Address, 691 raw_ostream &os, 692 raw_ostream &cs) const { 693 CommentStream = &cs; 694 695 uint8_t bytes[4]; 696 697 assert((STI.getFeatureBits() & ARM::ModeThumb) && 698 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!"); 699 700 // We want to read exactly 2 bytes of data. 701 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) { 702 Size = 0; 703 return MCDisassembler::Fail; 704 } 705 706 uint16_t insn16 = (bytes[1] << 8) | bytes[0]; 707 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI); 708 if (result != MCDisassembler::Fail) { 709 Size = 2; 710 Check(result, AddThumbPredicate(MI)); 711 return result; 712 } 713 714 MI.clear(); 715 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI); 716 if (result) { 717 Size = 2; 718 bool InITBlock = !ITBlock.empty(); 719 Check(result, AddThumbPredicate(MI)); 720 AddThumb1SBit(MI, InITBlock); 721 return result; 722 } 723 724 MI.clear(); 725 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI); 726 if (result != MCDisassembler::Fail) { 727 Size = 2; 728 729 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add 730 // the Thumb predicate. 731 if (MI.getOpcode() == ARM::t2IT && !ITBlock.empty()) 732 result = MCDisassembler::SoftFail; 733 734 Check(result, AddThumbPredicate(MI)); 735 736 // If we find an IT instruction, we need to parse its condition 737 // code and mask operands so that we can apply them correctly 738 // to the subsequent instructions. 739 if (MI.getOpcode() == ARM::t2IT) { 740 741 // (3 - the number of trailing zeros) is the number of then / else. 742 unsigned firstcond = MI.getOperand(0).getImm(); 743 unsigned Mask = MI.getOperand(1).getImm(); 744 unsigned CondBit0 = Mask >> 4 & 1; 745 unsigned NumTZ = CountTrailingZeros_32(Mask); 746 assert(NumTZ <= 3 && "Invalid IT mask!"); 747 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) { 748 bool T = ((Mask >> Pos) & 1) == CondBit0; 749 if (T) 750 ITBlock.insert(ITBlock.begin(), firstcond); 751 else 752 ITBlock.insert(ITBlock.begin(), firstcond ^ 1); 753 } 754 755 ITBlock.push_back(firstcond); 756 } 757 758 return result; 759 } 760 761 // We want to read exactly 4 bytes of data. 762 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) { 763 Size = 0; 764 return MCDisassembler::Fail; 765 } 766 767 uint32_t insn32 = (bytes[3] << 8) | 768 (bytes[2] << 0) | 769 (bytes[1] << 24) | 770 (bytes[0] << 16); 771 MI.clear(); 772 result = decodeThumbInstruction32(MI, insn32, Address, this, STI); 773 if (result != MCDisassembler::Fail) { 774 Size = 4; 775 bool InITBlock = ITBlock.size(); 776 Check(result, AddThumbPredicate(MI)); 777 AddThumb1SBit(MI, InITBlock); 778 return result; 779 } 780 781 MI.clear(); 782 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI); 783 if (result != MCDisassembler::Fail) { 784 Size = 4; 785 Check(result, AddThumbPredicate(MI)); 786 return result; 787 } 788 789 MI.clear(); 790 result = decodeVFPInstruction32(MI, insn32, Address, this, STI); 791 if (result != MCDisassembler::Fail) { 792 Size = 4; 793 UpdateThumbVFPPredicate(MI); 794 return result; 795 } 796 797 MI.clear(); 798 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI); 799 if (result != MCDisassembler::Fail) { 800 Size = 4; 801 Check(result, AddThumbPredicate(MI)); 802 return result; 803 } 804 805 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) { 806 MI.clear(); 807 uint32_t NEONLdStInsn = insn32; 808 NEONLdStInsn &= 0xF0FFFFFF; 809 NEONLdStInsn |= 0x04000000; 810 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI); 811 if (result != MCDisassembler::Fail) { 812 Size = 4; 813 Check(result, AddThumbPredicate(MI)); 814 return result; 815 } 816 } 817 818 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) { 819 MI.clear(); 820 uint32_t NEONDataInsn = insn32; 821 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24 822 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24 823 NEONDataInsn |= 0x12000000; // Set bits 28 and 25 824 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI); 825 if (result != MCDisassembler::Fail) { 826 Size = 4; 827 Check(result, AddThumbPredicate(MI)); 828 return result; 829 } 830 } 831 832 Size = 0; 833 return MCDisassembler::Fail; 834 } 835 836 837 extern "C" void LLVMInitializeARMDisassembler() { 838 TargetRegistry::RegisterMCDisassembler(TheARMTarget, 839 createARMDisassembler); 840 TargetRegistry::RegisterMCDisassembler(TheThumbTarget, 841 createThumbDisassembler); 842 } 843 844 static const unsigned GPRDecoderTable[] = { 845 ARM::R0, ARM::R1, ARM::R2, ARM::R3, 846 ARM::R4, ARM::R5, ARM::R6, ARM::R7, 847 ARM::R8, ARM::R9, ARM::R10, ARM::R11, 848 ARM::R12, ARM::SP, ARM::LR, ARM::PC 849 }; 850 851 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 852 uint64_t Address, const void *Decoder) { 853 if (RegNo > 15) 854 return MCDisassembler::Fail; 855 856 unsigned Register = GPRDecoderTable[RegNo]; 857 Inst.addOperand(MCOperand::CreateReg(Register)); 858 return MCDisassembler::Success; 859 } 860 861 static DecodeStatus 862 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 863 uint64_t Address, const void *Decoder) { 864 if (RegNo == 15) return MCDisassembler::Fail; 865 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder); 866 } 867 868 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 869 uint64_t Address, const void *Decoder) { 870 if (RegNo > 7) 871 return MCDisassembler::Fail; 872 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder); 873 } 874 875 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 876 uint64_t Address, const void *Decoder) { 877 unsigned Register = 0; 878 switch (RegNo) { 879 case 0: 880 Register = ARM::R0; 881 break; 882 case 1: 883 Register = ARM::R1; 884 break; 885 case 2: 886 Register = ARM::R2; 887 break; 888 case 3: 889 Register = ARM::R3; 890 break; 891 case 9: 892 Register = ARM::R9; 893 break; 894 case 12: 895 Register = ARM::R12; 896 break; 897 default: 898 return MCDisassembler::Fail; 899 } 900 901 Inst.addOperand(MCOperand::CreateReg(Register)); 902 return MCDisassembler::Success; 903 } 904 905 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 906 uint64_t Address, const void *Decoder) { 907 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail; 908 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder); 909 } 910 911 static const unsigned SPRDecoderTable[] = { 912 ARM::S0, ARM::S1, ARM::S2, ARM::S3, 913 ARM::S4, ARM::S5, ARM::S6, ARM::S7, 914 ARM::S8, ARM::S9, ARM::S10, ARM::S11, 915 ARM::S12, ARM::S13, ARM::S14, ARM::S15, 916 ARM::S16, ARM::S17, ARM::S18, ARM::S19, 917 ARM::S20, ARM::S21, ARM::S22, ARM::S23, 918 ARM::S24, ARM::S25, ARM::S26, ARM::S27, 919 ARM::S28, ARM::S29, ARM::S30, ARM::S31 920 }; 921 922 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 923 uint64_t Address, const void *Decoder) { 924 if (RegNo > 31) 925 return MCDisassembler::Fail; 926 927 unsigned Register = SPRDecoderTable[RegNo]; 928 Inst.addOperand(MCOperand::CreateReg(Register)); 929 return MCDisassembler::Success; 930 } 931 932 static const unsigned DPRDecoderTable[] = { 933 ARM::D0, ARM::D1, ARM::D2, ARM::D3, 934 ARM::D4, ARM::D5, ARM::D6, ARM::D7, 935 ARM::D8, ARM::D9, ARM::D10, ARM::D11, 936 ARM::D12, ARM::D13, ARM::D14, ARM::D15, 937 ARM::D16, ARM::D17, ARM::D18, ARM::D19, 938 ARM::D20, ARM::D21, ARM::D22, ARM::D23, 939 ARM::D24, ARM::D25, ARM::D26, ARM::D27, 940 ARM::D28, ARM::D29, ARM::D30, ARM::D31 941 }; 942 943 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 944 uint64_t Address, const void *Decoder) { 945 if (RegNo > 31) 946 return MCDisassembler::Fail; 947 948 unsigned Register = DPRDecoderTable[RegNo]; 949 Inst.addOperand(MCOperand::CreateReg(Register)); 950 return MCDisassembler::Success; 951 } 952 953 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo, 954 uint64_t Address, const void *Decoder) { 955 if (RegNo > 7) 956 return MCDisassembler::Fail; 957 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder); 958 } 959 960 static DecodeStatus 961 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo, 962 uint64_t Address, const void *Decoder) { 963 if (RegNo > 15) 964 return MCDisassembler::Fail; 965 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder); 966 } 967 968 static const unsigned QPRDecoderTable[] = { 969 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3, 970 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7, 971 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11, 972 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15 973 }; 974 975 976 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo, 977 uint64_t Address, const void *Decoder) { 978 if (RegNo > 31) 979 return MCDisassembler::Fail; 980 RegNo >>= 1; 981 982 unsigned Register = QPRDecoderTable[RegNo]; 983 Inst.addOperand(MCOperand::CreateReg(Register)); 984 return MCDisassembler::Success; 985 } 986 987 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val, 988 uint64_t Address, const void *Decoder) { 989 if (Val == 0xF) return MCDisassembler::Fail; 990 // AL predicate is not allowed on Thumb1 branches. 991 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE) 992 return MCDisassembler::Fail; 993 Inst.addOperand(MCOperand::CreateImm(Val)); 994 if (Val == ARMCC::AL) { 995 Inst.addOperand(MCOperand::CreateReg(0)); 996 } else 997 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR)); 998 return MCDisassembler::Success; 999 } 1000 1001 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val, 1002 uint64_t Address, const void *Decoder) { 1003 if (Val) 1004 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR)); 1005 else 1006 Inst.addOperand(MCOperand::CreateReg(0)); 1007 return MCDisassembler::Success; 1008 } 1009 1010 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val, 1011 uint64_t Address, const void *Decoder) { 1012 uint32_t imm = Val & 0xFF; 1013 uint32_t rot = (Val & 0xF00) >> 7; 1014 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F)); 1015 Inst.addOperand(MCOperand::CreateImm(rot_imm)); 1016 return MCDisassembler::Success; 1017 } 1018 1019 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val, 1020 uint64_t Address, const void *Decoder) { 1021 DecodeStatus S = MCDisassembler::Success; 1022 1023 unsigned Rm = fieldFromInstruction32(Val, 0, 4); 1024 unsigned type = fieldFromInstruction32(Val, 5, 2); 1025 unsigned imm = fieldFromInstruction32(Val, 7, 5); 1026 1027 // Register-immediate 1028 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 1029 return MCDisassembler::Fail; 1030 1031 ARM_AM::ShiftOpc Shift = ARM_AM::lsl; 1032 switch (type) { 1033 case 0: 1034 Shift = ARM_AM::lsl; 1035 break; 1036 case 1: 1037 Shift = ARM_AM::lsr; 1038 break; 1039 case 2: 1040 Shift = ARM_AM::asr; 1041 break; 1042 case 3: 1043 Shift = ARM_AM::ror; 1044 break; 1045 } 1046 1047 if (Shift == ARM_AM::ror && imm == 0) 1048 Shift = ARM_AM::rrx; 1049 1050 unsigned Op = Shift | (imm << 3); 1051 Inst.addOperand(MCOperand::CreateImm(Op)); 1052 1053 return S; 1054 } 1055 1056 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val, 1057 uint64_t Address, const void *Decoder) { 1058 DecodeStatus S = MCDisassembler::Success; 1059 1060 unsigned Rm = fieldFromInstruction32(Val, 0, 4); 1061 unsigned type = fieldFromInstruction32(Val, 5, 2); 1062 unsigned Rs = fieldFromInstruction32(Val, 8, 4); 1063 1064 // Register-register 1065 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder))) 1066 return MCDisassembler::Fail; 1067 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder))) 1068 return MCDisassembler::Fail; 1069 1070 ARM_AM::ShiftOpc Shift = ARM_AM::lsl; 1071 switch (type) { 1072 case 0: 1073 Shift = ARM_AM::lsl; 1074 break; 1075 case 1: 1076 Shift = ARM_AM::lsr; 1077 break; 1078 case 2: 1079 Shift = ARM_AM::asr; 1080 break; 1081 case 3: 1082 Shift = ARM_AM::ror; 1083 break; 1084 } 1085 1086 Inst.addOperand(MCOperand::CreateImm(Shift)); 1087 1088 return S; 1089 } 1090 1091 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val, 1092 uint64_t Address, const void *Decoder) { 1093 DecodeStatus S = MCDisassembler::Success; 1094 1095 bool writebackLoad = false; 1096 unsigned writebackReg = 0; 1097 switch (Inst.getOpcode()) { 1098 default: 1099 break; 1100 case ARM::LDMIA_UPD: 1101 case ARM::LDMDB_UPD: 1102 case ARM::LDMIB_UPD: 1103 case ARM::LDMDA_UPD: 1104 case ARM::t2LDMIA_UPD: 1105 case ARM::t2LDMDB_UPD: 1106 writebackLoad = true; 1107 writebackReg = Inst.getOperand(0).getReg(); 1108 break; 1109 } 1110 1111 // Empty register lists are not allowed. 1112 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail; 1113 for (unsigned i = 0; i < 16; ++i) { 1114 if (Val & (1 << i)) { 1115 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder))) 1116 return MCDisassembler::Fail; 1117 // Writeback not allowed if Rn is in the target list. 1118 if (writebackLoad && writebackReg == Inst.end()[-1].getReg()) 1119 Check(S, MCDisassembler::SoftFail); 1120 } 1121 } 1122 1123 return S; 1124 } 1125 1126 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val, 1127 uint64_t Address, const void *Decoder) { 1128 DecodeStatus S = MCDisassembler::Success; 1129 1130 unsigned Vd = fieldFromInstruction32(Val, 8, 4); 1131 unsigned regs = Val & 0xFF; 1132 1133 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder))) 1134 return MCDisassembler::Fail; 1135 for (unsigned i = 0; i < (regs - 1); ++i) { 1136 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder))) 1137 return MCDisassembler::Fail; 1138 } 1139 1140 return S; 1141 } 1142 1143 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val, 1144 uint64_t Address, const void *Decoder) { 1145 DecodeStatus S = MCDisassembler::Success; 1146 1147 unsigned Vd = fieldFromInstruction32(Val, 8, 4); 1148 unsigned regs = (Val & 0xFF) / 2; 1149 1150 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder))) 1151 return MCDisassembler::Fail; 1152 for (unsigned i = 0; i < (regs - 1); ++i) { 1153 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder))) 1154 return MCDisassembler::Fail; 1155 } 1156 1157 return S; 1158 } 1159 1160 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val, 1161 uint64_t Address, const void *Decoder) { 1162 // This operand encodes a mask of contiguous zeros between a specified MSB 1163 // and LSB. To decode it, we create the mask of all bits MSB-and-lower, 1164 // the mask of all bits LSB-and-lower, and then xor them to create 1165 // the mask of that's all ones on [msb, lsb]. Finally we not it to 1166 // create the final mask. 1167 unsigned msb = fieldFromInstruction32(Val, 5, 5); 1168 unsigned lsb = fieldFromInstruction32(Val, 0, 5); 1169 1170 DecodeStatus S = MCDisassembler::Success; 1171 if (lsb > msb) Check(S, MCDisassembler::SoftFail); 1172 1173 uint32_t msb_mask = 0xFFFFFFFF; 1174 if (msb != 31) msb_mask = (1U << (msb+1)) - 1; 1175 uint32_t lsb_mask = (1U << lsb) - 1; 1176 1177 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask))); 1178 return S; 1179 } 1180 1181 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn, 1182 uint64_t Address, const void *Decoder) { 1183 DecodeStatus S = MCDisassembler::Success; 1184 1185 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 1186 unsigned CRd = fieldFromInstruction32(Insn, 12, 4); 1187 unsigned coproc = fieldFromInstruction32(Insn, 8, 4); 1188 unsigned imm = fieldFromInstruction32(Insn, 0, 8); 1189 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 1190 unsigned U = fieldFromInstruction32(Insn, 23, 1); 1191 1192 switch (Inst.getOpcode()) { 1193 case ARM::LDC_OFFSET: 1194 case ARM::LDC_PRE: 1195 case ARM::LDC_POST: 1196 case ARM::LDC_OPTION: 1197 case ARM::LDCL_OFFSET: 1198 case ARM::LDCL_PRE: 1199 case ARM::LDCL_POST: 1200 case ARM::LDCL_OPTION: 1201 case ARM::STC_OFFSET: 1202 case ARM::STC_PRE: 1203 case ARM::STC_POST: 1204 case ARM::STC_OPTION: 1205 case ARM::STCL_OFFSET: 1206 case ARM::STCL_PRE: 1207 case ARM::STCL_POST: 1208 case ARM::STCL_OPTION: 1209 case ARM::t2LDC_OFFSET: 1210 case ARM::t2LDC_PRE: 1211 case ARM::t2LDC_POST: 1212 case ARM::t2LDC_OPTION: 1213 case ARM::t2LDCL_OFFSET: 1214 case ARM::t2LDCL_PRE: 1215 case ARM::t2LDCL_POST: 1216 case ARM::t2LDCL_OPTION: 1217 case ARM::t2STC_OFFSET: 1218 case ARM::t2STC_PRE: 1219 case ARM::t2STC_POST: 1220 case ARM::t2STC_OPTION: 1221 case ARM::t2STCL_OFFSET: 1222 case ARM::t2STCL_PRE: 1223 case ARM::t2STCL_POST: 1224 case ARM::t2STCL_OPTION: 1225 if (coproc == 0xA || coproc == 0xB) 1226 return MCDisassembler::Fail; 1227 break; 1228 default: 1229 break; 1230 } 1231 1232 Inst.addOperand(MCOperand::CreateImm(coproc)); 1233 Inst.addOperand(MCOperand::CreateImm(CRd)); 1234 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1235 return MCDisassembler::Fail; 1236 1237 switch (Inst.getOpcode()) { 1238 case ARM::t2LDC2_OFFSET: 1239 case ARM::t2LDC2L_OFFSET: 1240 case ARM::t2LDC2_PRE: 1241 case ARM::t2LDC2L_PRE: 1242 case ARM::t2STC2_OFFSET: 1243 case ARM::t2STC2L_OFFSET: 1244 case ARM::t2STC2_PRE: 1245 case ARM::t2STC2L_PRE: 1246 case ARM::LDC2_OFFSET: 1247 case ARM::LDC2L_OFFSET: 1248 case ARM::LDC2_PRE: 1249 case ARM::LDC2L_PRE: 1250 case ARM::STC2_OFFSET: 1251 case ARM::STC2L_OFFSET: 1252 case ARM::STC2_PRE: 1253 case ARM::STC2L_PRE: 1254 case ARM::t2LDC_OFFSET: 1255 case ARM::t2LDCL_OFFSET: 1256 case ARM::t2LDC_PRE: 1257 case ARM::t2LDCL_PRE: 1258 case ARM::t2STC_OFFSET: 1259 case ARM::t2STCL_OFFSET: 1260 case ARM::t2STC_PRE: 1261 case ARM::t2STCL_PRE: 1262 case ARM::LDC_OFFSET: 1263 case ARM::LDCL_OFFSET: 1264 case ARM::LDC_PRE: 1265 case ARM::LDCL_PRE: 1266 case ARM::STC_OFFSET: 1267 case ARM::STCL_OFFSET: 1268 case ARM::STC_PRE: 1269 case ARM::STCL_PRE: 1270 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm); 1271 Inst.addOperand(MCOperand::CreateImm(imm)); 1272 break; 1273 case ARM::t2LDC2_POST: 1274 case ARM::t2LDC2L_POST: 1275 case ARM::t2STC2_POST: 1276 case ARM::t2STC2L_POST: 1277 case ARM::LDC2_POST: 1278 case ARM::LDC2L_POST: 1279 case ARM::STC2_POST: 1280 case ARM::STC2L_POST: 1281 case ARM::t2LDC_POST: 1282 case ARM::t2LDCL_POST: 1283 case ARM::t2STC_POST: 1284 case ARM::t2STCL_POST: 1285 case ARM::LDC_POST: 1286 case ARM::LDCL_POST: 1287 case ARM::STC_POST: 1288 case ARM::STCL_POST: 1289 imm |= U << 8; 1290 // fall through. 1291 default: 1292 // The 'option' variant doesn't encode 'U' in the immediate since 1293 // the immediate is unsigned [0,255]. 1294 Inst.addOperand(MCOperand::CreateImm(imm)); 1295 break; 1296 } 1297 1298 switch (Inst.getOpcode()) { 1299 case ARM::LDC_OFFSET: 1300 case ARM::LDC_PRE: 1301 case ARM::LDC_POST: 1302 case ARM::LDC_OPTION: 1303 case ARM::LDCL_OFFSET: 1304 case ARM::LDCL_PRE: 1305 case ARM::LDCL_POST: 1306 case ARM::LDCL_OPTION: 1307 case ARM::STC_OFFSET: 1308 case ARM::STC_PRE: 1309 case ARM::STC_POST: 1310 case ARM::STC_OPTION: 1311 case ARM::STCL_OFFSET: 1312 case ARM::STCL_PRE: 1313 case ARM::STCL_POST: 1314 case ARM::STCL_OPTION: 1315 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 1316 return MCDisassembler::Fail; 1317 break; 1318 default: 1319 break; 1320 } 1321 1322 return S; 1323 } 1324 1325 static DecodeStatus 1326 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn, 1327 uint64_t Address, const void *Decoder) { 1328 DecodeStatus S = MCDisassembler::Success; 1329 1330 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 1331 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 1332 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 1333 unsigned imm = fieldFromInstruction32(Insn, 0, 12); 1334 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 1335 unsigned reg = fieldFromInstruction32(Insn, 25, 1); 1336 unsigned P = fieldFromInstruction32(Insn, 24, 1); 1337 unsigned W = fieldFromInstruction32(Insn, 21, 1); 1338 1339 // On stores, the writeback operand precedes Rt. 1340 switch (Inst.getOpcode()) { 1341 case ARM::STR_POST_IMM: 1342 case ARM::STR_POST_REG: 1343 case ARM::STRB_POST_IMM: 1344 case ARM::STRB_POST_REG: 1345 case ARM::STRT_POST_REG: 1346 case ARM::STRT_POST_IMM: 1347 case ARM::STRBT_POST_REG: 1348 case ARM::STRBT_POST_IMM: 1349 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1350 return MCDisassembler::Fail; 1351 break; 1352 default: 1353 break; 1354 } 1355 1356 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 1357 return MCDisassembler::Fail; 1358 1359 // On loads, the writeback operand comes after Rt. 1360 switch (Inst.getOpcode()) { 1361 case ARM::LDR_POST_IMM: 1362 case ARM::LDR_POST_REG: 1363 case ARM::LDRB_POST_IMM: 1364 case ARM::LDRB_POST_REG: 1365 case ARM::LDRBT_POST_REG: 1366 case ARM::LDRBT_POST_IMM: 1367 case ARM::LDRT_POST_REG: 1368 case ARM::LDRT_POST_IMM: 1369 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1370 return MCDisassembler::Fail; 1371 break; 1372 default: 1373 break; 1374 } 1375 1376 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1377 return MCDisassembler::Fail; 1378 1379 ARM_AM::AddrOpc Op = ARM_AM::add; 1380 if (!fieldFromInstruction32(Insn, 23, 1)) 1381 Op = ARM_AM::sub; 1382 1383 bool writeback = (P == 0) || (W == 1); 1384 unsigned idx_mode = 0; 1385 if (P && writeback) 1386 idx_mode = ARMII::IndexModePre; 1387 else if (!P && writeback) 1388 idx_mode = ARMII::IndexModePost; 1389 1390 if (writeback && (Rn == 15 || Rn == Rt)) 1391 S = MCDisassembler::SoftFail; // UNPREDICTABLE 1392 1393 if (reg) { 1394 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder))) 1395 return MCDisassembler::Fail; 1396 ARM_AM::ShiftOpc Opc = ARM_AM::lsl; 1397 switch( fieldFromInstruction32(Insn, 5, 2)) { 1398 case 0: 1399 Opc = ARM_AM::lsl; 1400 break; 1401 case 1: 1402 Opc = ARM_AM::lsr; 1403 break; 1404 case 2: 1405 Opc = ARM_AM::asr; 1406 break; 1407 case 3: 1408 Opc = ARM_AM::ror; 1409 break; 1410 default: 1411 return MCDisassembler::Fail; 1412 } 1413 unsigned amt = fieldFromInstruction32(Insn, 7, 5); 1414 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode); 1415 1416 Inst.addOperand(MCOperand::CreateImm(imm)); 1417 } else { 1418 Inst.addOperand(MCOperand::CreateReg(0)); 1419 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode); 1420 Inst.addOperand(MCOperand::CreateImm(tmp)); 1421 } 1422 1423 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 1424 return MCDisassembler::Fail; 1425 1426 return S; 1427 } 1428 1429 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val, 1430 uint64_t Address, const void *Decoder) { 1431 DecodeStatus S = MCDisassembler::Success; 1432 1433 unsigned Rn = fieldFromInstruction32(Val, 13, 4); 1434 unsigned Rm = fieldFromInstruction32(Val, 0, 4); 1435 unsigned type = fieldFromInstruction32(Val, 5, 2); 1436 unsigned imm = fieldFromInstruction32(Val, 7, 5); 1437 unsigned U = fieldFromInstruction32(Val, 12, 1); 1438 1439 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl; 1440 switch (type) { 1441 case 0: 1442 ShOp = ARM_AM::lsl; 1443 break; 1444 case 1: 1445 ShOp = ARM_AM::lsr; 1446 break; 1447 case 2: 1448 ShOp = ARM_AM::asr; 1449 break; 1450 case 3: 1451 ShOp = ARM_AM::ror; 1452 break; 1453 } 1454 1455 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1456 return MCDisassembler::Fail; 1457 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 1458 return MCDisassembler::Fail; 1459 unsigned shift; 1460 if (U) 1461 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp); 1462 else 1463 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp); 1464 Inst.addOperand(MCOperand::CreateImm(shift)); 1465 1466 return S; 1467 } 1468 1469 static DecodeStatus 1470 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn, 1471 uint64_t Address, const void *Decoder) { 1472 DecodeStatus S = MCDisassembler::Success; 1473 1474 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 1475 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 1476 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 1477 unsigned type = fieldFromInstruction32(Insn, 22, 1); 1478 unsigned imm = fieldFromInstruction32(Insn, 8, 4); 1479 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8; 1480 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 1481 unsigned W = fieldFromInstruction32(Insn, 21, 1); 1482 unsigned P = fieldFromInstruction32(Insn, 24, 1); 1483 1484 bool writeback = (W == 1) | (P == 0); 1485 1486 // For {LD,ST}RD, Rt must be even, else undefined. 1487 switch (Inst.getOpcode()) { 1488 case ARM::STRD: 1489 case ARM::STRD_PRE: 1490 case ARM::STRD_POST: 1491 case ARM::LDRD: 1492 case ARM::LDRD_PRE: 1493 case ARM::LDRD_POST: 1494 if (Rt & 0x1) return MCDisassembler::Fail; 1495 break; 1496 default: 1497 break; 1498 } 1499 1500 if (writeback) { // Writeback 1501 if (P) 1502 U |= ARMII::IndexModePre << 9; 1503 else 1504 U |= ARMII::IndexModePost << 9; 1505 1506 // On stores, the writeback operand precedes Rt. 1507 switch (Inst.getOpcode()) { 1508 case ARM::STRD: 1509 case ARM::STRD_PRE: 1510 case ARM::STRD_POST: 1511 case ARM::STRH: 1512 case ARM::STRH_PRE: 1513 case ARM::STRH_POST: 1514 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1515 return MCDisassembler::Fail; 1516 break; 1517 default: 1518 break; 1519 } 1520 } 1521 1522 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 1523 return MCDisassembler::Fail; 1524 switch (Inst.getOpcode()) { 1525 case ARM::STRD: 1526 case ARM::STRD_PRE: 1527 case ARM::STRD_POST: 1528 case ARM::LDRD: 1529 case ARM::LDRD_PRE: 1530 case ARM::LDRD_POST: 1531 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder))) 1532 return MCDisassembler::Fail; 1533 break; 1534 default: 1535 break; 1536 } 1537 1538 if (writeback) { 1539 // On loads, the writeback operand comes after Rt. 1540 switch (Inst.getOpcode()) { 1541 case ARM::LDRD: 1542 case ARM::LDRD_PRE: 1543 case ARM::LDRD_POST: 1544 case ARM::LDRH: 1545 case ARM::LDRH_PRE: 1546 case ARM::LDRH_POST: 1547 case ARM::LDRSH: 1548 case ARM::LDRSH_PRE: 1549 case ARM::LDRSH_POST: 1550 case ARM::LDRSB: 1551 case ARM::LDRSB_PRE: 1552 case ARM::LDRSB_POST: 1553 case ARM::LDRHTr: 1554 case ARM::LDRSBTr: 1555 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1556 return MCDisassembler::Fail; 1557 break; 1558 default: 1559 break; 1560 } 1561 } 1562 1563 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1564 return MCDisassembler::Fail; 1565 1566 if (type) { 1567 Inst.addOperand(MCOperand::CreateReg(0)); 1568 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm)); 1569 } else { 1570 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 1571 return MCDisassembler::Fail; 1572 Inst.addOperand(MCOperand::CreateImm(U)); 1573 } 1574 1575 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 1576 return MCDisassembler::Fail; 1577 1578 return S; 1579 } 1580 1581 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn, 1582 uint64_t Address, const void *Decoder) { 1583 DecodeStatus S = MCDisassembler::Success; 1584 1585 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 1586 unsigned mode = fieldFromInstruction32(Insn, 23, 2); 1587 1588 switch (mode) { 1589 case 0: 1590 mode = ARM_AM::da; 1591 break; 1592 case 1: 1593 mode = ARM_AM::ia; 1594 break; 1595 case 2: 1596 mode = ARM_AM::db; 1597 break; 1598 case 3: 1599 mode = ARM_AM::ib; 1600 break; 1601 } 1602 1603 Inst.addOperand(MCOperand::CreateImm(mode)); 1604 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1605 return MCDisassembler::Fail; 1606 1607 return S; 1608 } 1609 1610 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst, 1611 unsigned Insn, 1612 uint64_t Address, const void *Decoder) { 1613 DecodeStatus S = MCDisassembler::Success; 1614 1615 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 1616 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 1617 unsigned reglist = fieldFromInstruction32(Insn, 0, 16); 1618 1619 if (pred == 0xF) { 1620 switch (Inst.getOpcode()) { 1621 case ARM::LDMDA: 1622 Inst.setOpcode(ARM::RFEDA); 1623 break; 1624 case ARM::LDMDA_UPD: 1625 Inst.setOpcode(ARM::RFEDA_UPD); 1626 break; 1627 case ARM::LDMDB: 1628 Inst.setOpcode(ARM::RFEDB); 1629 break; 1630 case ARM::LDMDB_UPD: 1631 Inst.setOpcode(ARM::RFEDB_UPD); 1632 break; 1633 case ARM::LDMIA: 1634 Inst.setOpcode(ARM::RFEIA); 1635 break; 1636 case ARM::LDMIA_UPD: 1637 Inst.setOpcode(ARM::RFEIA_UPD); 1638 break; 1639 case ARM::LDMIB: 1640 Inst.setOpcode(ARM::RFEIB); 1641 break; 1642 case ARM::LDMIB_UPD: 1643 Inst.setOpcode(ARM::RFEIB_UPD); 1644 break; 1645 case ARM::STMDA: 1646 Inst.setOpcode(ARM::SRSDA); 1647 break; 1648 case ARM::STMDA_UPD: 1649 Inst.setOpcode(ARM::SRSDA_UPD); 1650 break; 1651 case ARM::STMDB: 1652 Inst.setOpcode(ARM::SRSDB); 1653 break; 1654 case ARM::STMDB_UPD: 1655 Inst.setOpcode(ARM::SRSDB_UPD); 1656 break; 1657 case ARM::STMIA: 1658 Inst.setOpcode(ARM::SRSIA); 1659 break; 1660 case ARM::STMIA_UPD: 1661 Inst.setOpcode(ARM::SRSIA_UPD); 1662 break; 1663 case ARM::STMIB: 1664 Inst.setOpcode(ARM::SRSIB); 1665 break; 1666 case ARM::STMIB_UPD: 1667 Inst.setOpcode(ARM::SRSIB_UPD); 1668 break; 1669 default: 1670 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail; 1671 } 1672 1673 // For stores (which become SRS's, the only operand is the mode. 1674 if (fieldFromInstruction32(Insn, 20, 1) == 0) { 1675 Inst.addOperand( 1676 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4))); 1677 return S; 1678 } 1679 1680 return DecodeRFEInstruction(Inst, Insn, Address, Decoder); 1681 } 1682 1683 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1684 return MCDisassembler::Fail; 1685 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1686 return MCDisassembler::Fail; // Tied 1687 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 1688 return MCDisassembler::Fail; 1689 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder))) 1690 return MCDisassembler::Fail; 1691 1692 return S; 1693 } 1694 1695 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn, 1696 uint64_t Address, const void *Decoder) { 1697 unsigned imod = fieldFromInstruction32(Insn, 18, 2); 1698 unsigned M = fieldFromInstruction32(Insn, 17, 1); 1699 unsigned iflags = fieldFromInstruction32(Insn, 6, 3); 1700 unsigned mode = fieldFromInstruction32(Insn, 0, 5); 1701 1702 DecodeStatus S = MCDisassembler::Success; 1703 1704 // imod == '01' --> UNPREDICTABLE 1705 // NOTE: Even though this is technically UNPREDICTABLE, we choose to 1706 // return failure here. The '01' imod value is unprintable, so there's 1707 // nothing useful we could do even if we returned UNPREDICTABLE. 1708 1709 if (imod == 1) return MCDisassembler::Fail; 1710 1711 if (imod && M) { 1712 Inst.setOpcode(ARM::CPS3p); 1713 Inst.addOperand(MCOperand::CreateImm(imod)); 1714 Inst.addOperand(MCOperand::CreateImm(iflags)); 1715 Inst.addOperand(MCOperand::CreateImm(mode)); 1716 } else if (imod && !M) { 1717 Inst.setOpcode(ARM::CPS2p); 1718 Inst.addOperand(MCOperand::CreateImm(imod)); 1719 Inst.addOperand(MCOperand::CreateImm(iflags)); 1720 if (mode) S = MCDisassembler::SoftFail; 1721 } else if (!imod && M) { 1722 Inst.setOpcode(ARM::CPS1p); 1723 Inst.addOperand(MCOperand::CreateImm(mode)); 1724 if (iflags) S = MCDisassembler::SoftFail; 1725 } else { 1726 // imod == '00' && M == '0' --> UNPREDICTABLE 1727 Inst.setOpcode(ARM::CPS1p); 1728 Inst.addOperand(MCOperand::CreateImm(mode)); 1729 S = MCDisassembler::SoftFail; 1730 } 1731 1732 return S; 1733 } 1734 1735 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn, 1736 uint64_t Address, const void *Decoder) { 1737 unsigned imod = fieldFromInstruction32(Insn, 9, 2); 1738 unsigned M = fieldFromInstruction32(Insn, 8, 1); 1739 unsigned iflags = fieldFromInstruction32(Insn, 5, 3); 1740 unsigned mode = fieldFromInstruction32(Insn, 0, 5); 1741 1742 DecodeStatus S = MCDisassembler::Success; 1743 1744 // imod == '01' --> UNPREDICTABLE 1745 // NOTE: Even though this is technically UNPREDICTABLE, we choose to 1746 // return failure here. The '01' imod value is unprintable, so there's 1747 // nothing useful we could do even if we returned UNPREDICTABLE. 1748 1749 if (imod == 1) return MCDisassembler::Fail; 1750 1751 if (imod && M) { 1752 Inst.setOpcode(ARM::t2CPS3p); 1753 Inst.addOperand(MCOperand::CreateImm(imod)); 1754 Inst.addOperand(MCOperand::CreateImm(iflags)); 1755 Inst.addOperand(MCOperand::CreateImm(mode)); 1756 } else if (imod && !M) { 1757 Inst.setOpcode(ARM::t2CPS2p); 1758 Inst.addOperand(MCOperand::CreateImm(imod)); 1759 Inst.addOperand(MCOperand::CreateImm(iflags)); 1760 if (mode) S = MCDisassembler::SoftFail; 1761 } else if (!imod && M) { 1762 Inst.setOpcode(ARM::t2CPS1p); 1763 Inst.addOperand(MCOperand::CreateImm(mode)); 1764 if (iflags) S = MCDisassembler::SoftFail; 1765 } else { 1766 // imod == '00' && M == '0' --> UNPREDICTABLE 1767 Inst.setOpcode(ARM::t2CPS1p); 1768 Inst.addOperand(MCOperand::CreateImm(mode)); 1769 S = MCDisassembler::SoftFail; 1770 } 1771 1772 return S; 1773 } 1774 1775 static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn, 1776 uint64_t Address, const void *Decoder) { 1777 DecodeStatus S = MCDisassembler::Success; 1778 1779 unsigned Rd = fieldFromInstruction32(Insn, 8, 4); 1780 unsigned imm = 0; 1781 1782 imm |= (fieldFromInstruction32(Insn, 0, 8) << 0); 1783 imm |= (fieldFromInstruction32(Insn, 12, 3) << 8); 1784 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12); 1785 imm |= (fieldFromInstruction32(Insn, 26, 1) << 11); 1786 1787 if (Inst.getOpcode() == ARM::t2MOVTi16) 1788 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder))) 1789 return MCDisassembler::Fail; 1790 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder))) 1791 return MCDisassembler::Fail; 1792 1793 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder)) 1794 Inst.addOperand(MCOperand::CreateImm(imm)); 1795 1796 return S; 1797 } 1798 1799 static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn, 1800 uint64_t Address, const void *Decoder) { 1801 DecodeStatus S = MCDisassembler::Success; 1802 1803 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 1804 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 1805 unsigned imm = 0; 1806 1807 imm |= (fieldFromInstruction32(Insn, 0, 12) << 0); 1808 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12); 1809 1810 if (Inst.getOpcode() == ARM::MOVTi16) 1811 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder))) 1812 return MCDisassembler::Fail; 1813 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder))) 1814 return MCDisassembler::Fail; 1815 1816 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder)) 1817 Inst.addOperand(MCOperand::CreateImm(imm)); 1818 1819 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 1820 return MCDisassembler::Fail; 1821 1822 return S; 1823 } 1824 1825 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn, 1826 uint64_t Address, const void *Decoder) { 1827 DecodeStatus S = MCDisassembler::Success; 1828 1829 unsigned Rd = fieldFromInstruction32(Insn, 16, 4); 1830 unsigned Rn = fieldFromInstruction32(Insn, 0, 4); 1831 unsigned Rm = fieldFromInstruction32(Insn, 8, 4); 1832 unsigned Ra = fieldFromInstruction32(Insn, 12, 4); 1833 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 1834 1835 if (pred == 0xF) 1836 return DecodeCPSInstruction(Inst, Insn, Address, Decoder); 1837 1838 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder))) 1839 return MCDisassembler::Fail; 1840 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 1841 return MCDisassembler::Fail; 1842 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder))) 1843 return MCDisassembler::Fail; 1844 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder))) 1845 return MCDisassembler::Fail; 1846 1847 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 1848 return MCDisassembler::Fail; 1849 1850 return S; 1851 } 1852 1853 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val, 1854 uint64_t Address, const void *Decoder) { 1855 DecodeStatus S = MCDisassembler::Success; 1856 1857 unsigned add = fieldFromInstruction32(Val, 12, 1); 1858 unsigned imm = fieldFromInstruction32(Val, 0, 12); 1859 unsigned Rn = fieldFromInstruction32(Val, 13, 4); 1860 1861 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1862 return MCDisassembler::Fail; 1863 1864 if (!add) imm *= -1; 1865 if (imm == 0 && !add) imm = INT32_MIN; 1866 Inst.addOperand(MCOperand::CreateImm(imm)); 1867 if (Rn == 15) 1868 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder); 1869 1870 return S; 1871 } 1872 1873 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val, 1874 uint64_t Address, const void *Decoder) { 1875 DecodeStatus S = MCDisassembler::Success; 1876 1877 unsigned Rn = fieldFromInstruction32(Val, 9, 4); 1878 unsigned U = fieldFromInstruction32(Val, 8, 1); 1879 unsigned imm = fieldFromInstruction32(Val, 0, 8); 1880 1881 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 1882 return MCDisassembler::Fail; 1883 1884 if (U) 1885 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm))); 1886 else 1887 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm))); 1888 1889 return S; 1890 } 1891 1892 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val, 1893 uint64_t Address, const void *Decoder) { 1894 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder); 1895 } 1896 1897 static DecodeStatus 1898 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn, 1899 uint64_t Address, const void *Decoder) { 1900 DecodeStatus S = MCDisassembler::Success; 1901 1902 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 1903 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2; 1904 1905 if (pred == 0xF) { 1906 Inst.setOpcode(ARM::BLXi); 1907 imm |= fieldFromInstruction32(Insn, 24, 1) << 1; 1908 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm))); 1909 return S; 1910 } 1911 1912 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8, true, 1913 4, Inst, Decoder)) 1914 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm))); 1915 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 1916 return MCDisassembler::Fail; 1917 1918 return S; 1919 } 1920 1921 1922 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val, 1923 uint64_t Address, const void *Decoder) { 1924 Inst.addOperand(MCOperand::CreateImm(64 - Val)); 1925 return MCDisassembler::Success; 1926 } 1927 1928 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val, 1929 uint64_t Address, const void *Decoder) { 1930 DecodeStatus S = MCDisassembler::Success; 1931 1932 unsigned Rm = fieldFromInstruction32(Val, 0, 4); 1933 unsigned align = fieldFromInstruction32(Val, 4, 2); 1934 1935 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 1936 return MCDisassembler::Fail; 1937 if (!align) 1938 Inst.addOperand(MCOperand::CreateImm(0)); 1939 else 1940 Inst.addOperand(MCOperand::CreateImm(4 << align)); 1941 1942 return S; 1943 } 1944 1945 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn, 1946 uint64_t Address, const void *Decoder) { 1947 DecodeStatus S = MCDisassembler::Success; 1948 1949 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 1950 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 1951 unsigned wb = fieldFromInstruction32(Insn, 16, 4); 1952 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 1953 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4; 1954 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 1955 1956 // First output register 1957 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 1958 return MCDisassembler::Fail; 1959 1960 // Second output register 1961 switch (Inst.getOpcode()) { 1962 case ARM::VLD1q8: 1963 case ARM::VLD1q16: 1964 case ARM::VLD1q32: 1965 case ARM::VLD1q64: 1966 case ARM::VLD1q8_UPD: 1967 case ARM::VLD1q16_UPD: 1968 case ARM::VLD1q32_UPD: 1969 case ARM::VLD1q64_UPD: 1970 case ARM::VLD1d8T: 1971 case ARM::VLD1d16T: 1972 case ARM::VLD1d32T: 1973 case ARM::VLD1d64T: 1974 case ARM::VLD1d8T_UPD: 1975 case ARM::VLD1d16T_UPD: 1976 case ARM::VLD1d32T_UPD: 1977 case ARM::VLD1d64T_UPD: 1978 case ARM::VLD1d8Q: 1979 case ARM::VLD1d16Q: 1980 case ARM::VLD1d32Q: 1981 case ARM::VLD1d64Q: 1982 case ARM::VLD1d8Q_UPD: 1983 case ARM::VLD1d16Q_UPD: 1984 case ARM::VLD1d32Q_UPD: 1985 case ARM::VLD1d64Q_UPD: 1986 case ARM::VLD2d8: 1987 case ARM::VLD2d16: 1988 case ARM::VLD2d32: 1989 case ARM::VLD2d8_UPD: 1990 case ARM::VLD2d16_UPD: 1991 case ARM::VLD2d32_UPD: 1992 case ARM::VLD2q8: 1993 case ARM::VLD2q16: 1994 case ARM::VLD2q32: 1995 case ARM::VLD2q8_UPD: 1996 case ARM::VLD2q16_UPD: 1997 case ARM::VLD2q32_UPD: 1998 case ARM::VLD3d8: 1999 case ARM::VLD3d16: 2000 case ARM::VLD3d32: 2001 case ARM::VLD3d8_UPD: 2002 case ARM::VLD3d16_UPD: 2003 case ARM::VLD3d32_UPD: 2004 case ARM::VLD4d8: 2005 case ARM::VLD4d16: 2006 case ARM::VLD4d32: 2007 case ARM::VLD4d8_UPD: 2008 case ARM::VLD4d16_UPD: 2009 case ARM::VLD4d32_UPD: 2010 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder))) 2011 return MCDisassembler::Fail; 2012 break; 2013 case ARM::VLD2b8: 2014 case ARM::VLD2b16: 2015 case ARM::VLD2b32: 2016 case ARM::VLD2b8_UPD: 2017 case ARM::VLD2b16_UPD: 2018 case ARM::VLD2b32_UPD: 2019 case ARM::VLD3q8: 2020 case ARM::VLD3q16: 2021 case ARM::VLD3q32: 2022 case ARM::VLD3q8_UPD: 2023 case ARM::VLD3q16_UPD: 2024 case ARM::VLD3q32_UPD: 2025 case ARM::VLD4q8: 2026 case ARM::VLD4q16: 2027 case ARM::VLD4q32: 2028 case ARM::VLD4q8_UPD: 2029 case ARM::VLD4q16_UPD: 2030 case ARM::VLD4q32_UPD: 2031 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder))) 2032 return MCDisassembler::Fail; 2033 default: 2034 break; 2035 } 2036 2037 // Third output register 2038 switch(Inst.getOpcode()) { 2039 case ARM::VLD1d8T: 2040 case ARM::VLD1d16T: 2041 case ARM::VLD1d32T: 2042 case ARM::VLD1d64T: 2043 case ARM::VLD1d8T_UPD: 2044 case ARM::VLD1d16T_UPD: 2045 case ARM::VLD1d32T_UPD: 2046 case ARM::VLD1d64T_UPD: 2047 case ARM::VLD1d8Q: 2048 case ARM::VLD1d16Q: 2049 case ARM::VLD1d32Q: 2050 case ARM::VLD1d64Q: 2051 case ARM::VLD1d8Q_UPD: 2052 case ARM::VLD1d16Q_UPD: 2053 case ARM::VLD1d32Q_UPD: 2054 case ARM::VLD1d64Q_UPD: 2055 case ARM::VLD2q8: 2056 case ARM::VLD2q16: 2057 case ARM::VLD2q32: 2058 case ARM::VLD2q8_UPD: 2059 case ARM::VLD2q16_UPD: 2060 case ARM::VLD2q32_UPD: 2061 case ARM::VLD3d8: 2062 case ARM::VLD3d16: 2063 case ARM::VLD3d32: 2064 case ARM::VLD3d8_UPD: 2065 case ARM::VLD3d16_UPD: 2066 case ARM::VLD3d32_UPD: 2067 case ARM::VLD4d8: 2068 case ARM::VLD4d16: 2069 case ARM::VLD4d32: 2070 case ARM::VLD4d8_UPD: 2071 case ARM::VLD4d16_UPD: 2072 case ARM::VLD4d32_UPD: 2073 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder))) 2074 return MCDisassembler::Fail; 2075 break; 2076 case ARM::VLD3q8: 2077 case ARM::VLD3q16: 2078 case ARM::VLD3q32: 2079 case ARM::VLD3q8_UPD: 2080 case ARM::VLD3q16_UPD: 2081 case ARM::VLD3q32_UPD: 2082 case ARM::VLD4q8: 2083 case ARM::VLD4q16: 2084 case ARM::VLD4q32: 2085 case ARM::VLD4q8_UPD: 2086 case ARM::VLD4q16_UPD: 2087 case ARM::VLD4q32_UPD: 2088 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder))) 2089 return MCDisassembler::Fail; 2090 break; 2091 default: 2092 break; 2093 } 2094 2095 // Fourth output register 2096 switch (Inst.getOpcode()) { 2097 case ARM::VLD1d8Q: 2098 case ARM::VLD1d16Q: 2099 case ARM::VLD1d32Q: 2100 case ARM::VLD1d64Q: 2101 case ARM::VLD1d8Q_UPD: 2102 case ARM::VLD1d16Q_UPD: 2103 case ARM::VLD1d32Q_UPD: 2104 case ARM::VLD1d64Q_UPD: 2105 case ARM::VLD2q8: 2106 case ARM::VLD2q16: 2107 case ARM::VLD2q32: 2108 case ARM::VLD2q8_UPD: 2109 case ARM::VLD2q16_UPD: 2110 case ARM::VLD2q32_UPD: 2111 case ARM::VLD4d8: 2112 case ARM::VLD4d16: 2113 case ARM::VLD4d32: 2114 case ARM::VLD4d8_UPD: 2115 case ARM::VLD4d16_UPD: 2116 case ARM::VLD4d32_UPD: 2117 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder))) 2118 return MCDisassembler::Fail; 2119 break; 2120 case ARM::VLD4q8: 2121 case ARM::VLD4q16: 2122 case ARM::VLD4q32: 2123 case ARM::VLD4q8_UPD: 2124 case ARM::VLD4q16_UPD: 2125 case ARM::VLD4q32_UPD: 2126 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder))) 2127 return MCDisassembler::Fail; 2128 break; 2129 default: 2130 break; 2131 } 2132 2133 // Writeback operand 2134 switch (Inst.getOpcode()) { 2135 case ARM::VLD1d8_UPD: 2136 case ARM::VLD1d16_UPD: 2137 case ARM::VLD1d32_UPD: 2138 case ARM::VLD1d64_UPD: 2139 case ARM::VLD1q8_UPD: 2140 case ARM::VLD1q16_UPD: 2141 case ARM::VLD1q32_UPD: 2142 case ARM::VLD1q64_UPD: 2143 case ARM::VLD1d8T_UPD: 2144 case ARM::VLD1d16T_UPD: 2145 case ARM::VLD1d32T_UPD: 2146 case ARM::VLD1d64T_UPD: 2147 case ARM::VLD1d8Q_UPD: 2148 case ARM::VLD1d16Q_UPD: 2149 case ARM::VLD1d32Q_UPD: 2150 case ARM::VLD1d64Q_UPD: 2151 case ARM::VLD2d8_UPD: 2152 case ARM::VLD2d16_UPD: 2153 case ARM::VLD2d32_UPD: 2154 case ARM::VLD2q8_UPD: 2155 case ARM::VLD2q16_UPD: 2156 case ARM::VLD2q32_UPD: 2157 case ARM::VLD2b8_UPD: 2158 case ARM::VLD2b16_UPD: 2159 case ARM::VLD2b32_UPD: 2160 case ARM::VLD3d8_UPD: 2161 case ARM::VLD3d16_UPD: 2162 case ARM::VLD3d32_UPD: 2163 case ARM::VLD3q8_UPD: 2164 case ARM::VLD3q16_UPD: 2165 case ARM::VLD3q32_UPD: 2166 case ARM::VLD4d8_UPD: 2167 case ARM::VLD4d16_UPD: 2168 case ARM::VLD4d32_UPD: 2169 case ARM::VLD4q8_UPD: 2170 case ARM::VLD4q16_UPD: 2171 case ARM::VLD4q32_UPD: 2172 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder))) 2173 return MCDisassembler::Fail; 2174 break; 2175 default: 2176 break; 2177 } 2178 2179 // AddrMode6 Base (register+alignment) 2180 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder))) 2181 return MCDisassembler::Fail; 2182 2183 // AddrMode6 Offset (register) 2184 if (Rm == 0xD) 2185 Inst.addOperand(MCOperand::CreateReg(0)); 2186 else if (Rm != 0xF) { 2187 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2188 return MCDisassembler::Fail; 2189 } 2190 2191 return S; 2192 } 2193 2194 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn, 2195 uint64_t Address, const void *Decoder) { 2196 DecodeStatus S = MCDisassembler::Success; 2197 2198 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 2199 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 2200 unsigned wb = fieldFromInstruction32(Insn, 16, 4); 2201 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 2202 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4; 2203 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 2204 2205 // Writeback Operand 2206 switch (Inst.getOpcode()) { 2207 case ARM::VST1d8_UPD: 2208 case ARM::VST1d16_UPD: 2209 case ARM::VST1d32_UPD: 2210 case ARM::VST1d64_UPD: 2211 case ARM::VST1q8_UPD: 2212 case ARM::VST1q16_UPD: 2213 case ARM::VST1q32_UPD: 2214 case ARM::VST1q64_UPD: 2215 case ARM::VST1d8T_UPD: 2216 case ARM::VST1d16T_UPD: 2217 case ARM::VST1d32T_UPD: 2218 case ARM::VST1d64T_UPD: 2219 case ARM::VST1d8Q_UPD: 2220 case ARM::VST1d16Q_UPD: 2221 case ARM::VST1d32Q_UPD: 2222 case ARM::VST1d64Q_UPD: 2223 case ARM::VST2d8_UPD: 2224 case ARM::VST2d16_UPD: 2225 case ARM::VST2d32_UPD: 2226 case ARM::VST2q8_UPD: 2227 case ARM::VST2q16_UPD: 2228 case ARM::VST2q32_UPD: 2229 case ARM::VST2b8_UPD: 2230 case ARM::VST2b16_UPD: 2231 case ARM::VST2b32_UPD: 2232 case ARM::VST3d8_UPD: 2233 case ARM::VST3d16_UPD: 2234 case ARM::VST3d32_UPD: 2235 case ARM::VST3q8_UPD: 2236 case ARM::VST3q16_UPD: 2237 case ARM::VST3q32_UPD: 2238 case ARM::VST4d8_UPD: 2239 case ARM::VST4d16_UPD: 2240 case ARM::VST4d32_UPD: 2241 case ARM::VST4q8_UPD: 2242 case ARM::VST4q16_UPD: 2243 case ARM::VST4q32_UPD: 2244 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder))) 2245 return MCDisassembler::Fail; 2246 break; 2247 default: 2248 break; 2249 } 2250 2251 // AddrMode6 Base (register+alignment) 2252 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder))) 2253 return MCDisassembler::Fail; 2254 2255 // AddrMode6 Offset (register) 2256 if (Rm == 0xD) 2257 Inst.addOperand(MCOperand::CreateReg(0)); 2258 else if (Rm != 0xF) { 2259 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2260 return MCDisassembler::Fail; 2261 } 2262 2263 // First input register 2264 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2265 return MCDisassembler::Fail; 2266 2267 // Second input register 2268 switch (Inst.getOpcode()) { 2269 case ARM::VST1q8: 2270 case ARM::VST1q16: 2271 case ARM::VST1q32: 2272 case ARM::VST1q64: 2273 case ARM::VST1q8_UPD: 2274 case ARM::VST1q16_UPD: 2275 case ARM::VST1q32_UPD: 2276 case ARM::VST1q64_UPD: 2277 case ARM::VST1d8T: 2278 case ARM::VST1d16T: 2279 case ARM::VST1d32T: 2280 case ARM::VST1d64T: 2281 case ARM::VST1d8T_UPD: 2282 case ARM::VST1d16T_UPD: 2283 case ARM::VST1d32T_UPD: 2284 case ARM::VST1d64T_UPD: 2285 case ARM::VST1d8Q: 2286 case ARM::VST1d16Q: 2287 case ARM::VST1d32Q: 2288 case ARM::VST1d64Q: 2289 case ARM::VST1d8Q_UPD: 2290 case ARM::VST1d16Q_UPD: 2291 case ARM::VST1d32Q_UPD: 2292 case ARM::VST1d64Q_UPD: 2293 case ARM::VST2d8: 2294 case ARM::VST2d16: 2295 case ARM::VST2d32: 2296 case ARM::VST2d8_UPD: 2297 case ARM::VST2d16_UPD: 2298 case ARM::VST2d32_UPD: 2299 case ARM::VST2q8: 2300 case ARM::VST2q16: 2301 case ARM::VST2q32: 2302 case ARM::VST2q8_UPD: 2303 case ARM::VST2q16_UPD: 2304 case ARM::VST2q32_UPD: 2305 case ARM::VST3d8: 2306 case ARM::VST3d16: 2307 case ARM::VST3d32: 2308 case ARM::VST3d8_UPD: 2309 case ARM::VST3d16_UPD: 2310 case ARM::VST3d32_UPD: 2311 case ARM::VST4d8: 2312 case ARM::VST4d16: 2313 case ARM::VST4d32: 2314 case ARM::VST4d8_UPD: 2315 case ARM::VST4d16_UPD: 2316 case ARM::VST4d32_UPD: 2317 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder))) 2318 return MCDisassembler::Fail; 2319 break; 2320 case ARM::VST2b8: 2321 case ARM::VST2b16: 2322 case ARM::VST2b32: 2323 case ARM::VST2b8_UPD: 2324 case ARM::VST2b16_UPD: 2325 case ARM::VST2b32_UPD: 2326 case ARM::VST3q8: 2327 case ARM::VST3q16: 2328 case ARM::VST3q32: 2329 case ARM::VST3q8_UPD: 2330 case ARM::VST3q16_UPD: 2331 case ARM::VST3q32_UPD: 2332 case ARM::VST4q8: 2333 case ARM::VST4q16: 2334 case ARM::VST4q32: 2335 case ARM::VST4q8_UPD: 2336 case ARM::VST4q16_UPD: 2337 case ARM::VST4q32_UPD: 2338 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder))) 2339 return MCDisassembler::Fail; 2340 break; 2341 default: 2342 break; 2343 } 2344 2345 // Third input register 2346 switch (Inst.getOpcode()) { 2347 case ARM::VST1d8T: 2348 case ARM::VST1d16T: 2349 case ARM::VST1d32T: 2350 case ARM::VST1d64T: 2351 case ARM::VST1d8T_UPD: 2352 case ARM::VST1d16T_UPD: 2353 case ARM::VST1d32T_UPD: 2354 case ARM::VST1d64T_UPD: 2355 case ARM::VST1d8Q: 2356 case ARM::VST1d16Q: 2357 case ARM::VST1d32Q: 2358 case ARM::VST1d64Q: 2359 case ARM::VST1d8Q_UPD: 2360 case ARM::VST1d16Q_UPD: 2361 case ARM::VST1d32Q_UPD: 2362 case ARM::VST1d64Q_UPD: 2363 case ARM::VST2q8: 2364 case ARM::VST2q16: 2365 case ARM::VST2q32: 2366 case ARM::VST2q8_UPD: 2367 case ARM::VST2q16_UPD: 2368 case ARM::VST2q32_UPD: 2369 case ARM::VST3d8: 2370 case ARM::VST3d16: 2371 case ARM::VST3d32: 2372 case ARM::VST3d8_UPD: 2373 case ARM::VST3d16_UPD: 2374 case ARM::VST3d32_UPD: 2375 case ARM::VST4d8: 2376 case ARM::VST4d16: 2377 case ARM::VST4d32: 2378 case ARM::VST4d8_UPD: 2379 case ARM::VST4d16_UPD: 2380 case ARM::VST4d32_UPD: 2381 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder))) 2382 return MCDisassembler::Fail; 2383 break; 2384 case ARM::VST3q8: 2385 case ARM::VST3q16: 2386 case ARM::VST3q32: 2387 case ARM::VST3q8_UPD: 2388 case ARM::VST3q16_UPD: 2389 case ARM::VST3q32_UPD: 2390 case ARM::VST4q8: 2391 case ARM::VST4q16: 2392 case ARM::VST4q32: 2393 case ARM::VST4q8_UPD: 2394 case ARM::VST4q16_UPD: 2395 case ARM::VST4q32_UPD: 2396 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder))) 2397 return MCDisassembler::Fail; 2398 break; 2399 default: 2400 break; 2401 } 2402 2403 // Fourth input register 2404 switch (Inst.getOpcode()) { 2405 case ARM::VST1d8Q: 2406 case ARM::VST1d16Q: 2407 case ARM::VST1d32Q: 2408 case ARM::VST1d64Q: 2409 case ARM::VST1d8Q_UPD: 2410 case ARM::VST1d16Q_UPD: 2411 case ARM::VST1d32Q_UPD: 2412 case ARM::VST1d64Q_UPD: 2413 case ARM::VST2q8: 2414 case ARM::VST2q16: 2415 case ARM::VST2q32: 2416 case ARM::VST2q8_UPD: 2417 case ARM::VST2q16_UPD: 2418 case ARM::VST2q32_UPD: 2419 case ARM::VST4d8: 2420 case ARM::VST4d16: 2421 case ARM::VST4d32: 2422 case ARM::VST4d8_UPD: 2423 case ARM::VST4d16_UPD: 2424 case ARM::VST4d32_UPD: 2425 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder))) 2426 return MCDisassembler::Fail; 2427 break; 2428 case ARM::VST4q8: 2429 case ARM::VST4q16: 2430 case ARM::VST4q32: 2431 case ARM::VST4q8_UPD: 2432 case ARM::VST4q16_UPD: 2433 case ARM::VST4q32_UPD: 2434 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder))) 2435 return MCDisassembler::Fail; 2436 break; 2437 default: 2438 break; 2439 } 2440 2441 return S; 2442 } 2443 2444 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn, 2445 uint64_t Address, const void *Decoder) { 2446 DecodeStatus S = MCDisassembler::Success; 2447 2448 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 2449 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 2450 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 2451 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 2452 unsigned align = fieldFromInstruction32(Insn, 4, 1); 2453 unsigned size = fieldFromInstruction32(Insn, 6, 2); 2454 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1; 2455 2456 align *= (1 << size); 2457 2458 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2459 return MCDisassembler::Fail; 2460 if (regs == 2) { 2461 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder))) 2462 return MCDisassembler::Fail; 2463 } 2464 if (Rm != 0xF) { 2465 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2466 return MCDisassembler::Fail; 2467 } 2468 2469 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2470 return MCDisassembler::Fail; 2471 Inst.addOperand(MCOperand::CreateImm(align)); 2472 2473 if (Rm == 0xD) 2474 Inst.addOperand(MCOperand::CreateReg(0)); 2475 else if (Rm != 0xF) { 2476 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2477 return MCDisassembler::Fail; 2478 } 2479 2480 return S; 2481 } 2482 2483 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn, 2484 uint64_t Address, const void *Decoder) { 2485 DecodeStatus S = MCDisassembler::Success; 2486 2487 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 2488 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 2489 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 2490 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 2491 unsigned align = fieldFromInstruction32(Insn, 4, 1); 2492 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2); 2493 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1; 2494 align *= 2*size; 2495 2496 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2497 return MCDisassembler::Fail; 2498 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder))) 2499 return MCDisassembler::Fail; 2500 if (Rm != 0xF) { 2501 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2502 return MCDisassembler::Fail; 2503 } 2504 2505 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2506 return MCDisassembler::Fail; 2507 Inst.addOperand(MCOperand::CreateImm(align)); 2508 2509 if (Rm == 0xD) 2510 Inst.addOperand(MCOperand::CreateReg(0)); 2511 else if (Rm != 0xF) { 2512 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2513 return MCDisassembler::Fail; 2514 } 2515 2516 return S; 2517 } 2518 2519 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn, 2520 uint64_t Address, const void *Decoder) { 2521 DecodeStatus S = MCDisassembler::Success; 2522 2523 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 2524 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 2525 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 2526 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 2527 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1; 2528 2529 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2530 return MCDisassembler::Fail; 2531 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder))) 2532 return MCDisassembler::Fail; 2533 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder))) 2534 return MCDisassembler::Fail; 2535 if (Rm != 0xF) { 2536 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2537 return MCDisassembler::Fail; 2538 } 2539 2540 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2541 return MCDisassembler::Fail; 2542 Inst.addOperand(MCOperand::CreateImm(0)); 2543 2544 if (Rm == 0xD) 2545 Inst.addOperand(MCOperand::CreateReg(0)); 2546 else if (Rm != 0xF) { 2547 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2548 return MCDisassembler::Fail; 2549 } 2550 2551 return S; 2552 } 2553 2554 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn, 2555 uint64_t Address, const void *Decoder) { 2556 DecodeStatus S = MCDisassembler::Success; 2557 2558 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 2559 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 2560 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 2561 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 2562 unsigned size = fieldFromInstruction32(Insn, 6, 2); 2563 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1; 2564 unsigned align = fieldFromInstruction32(Insn, 4, 1); 2565 2566 if (size == 0x3) { 2567 size = 4; 2568 align = 16; 2569 } else { 2570 if (size == 2) { 2571 size = 1 << size; 2572 align *= 8; 2573 } else { 2574 size = 1 << size; 2575 align *= 4*size; 2576 } 2577 } 2578 2579 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2580 return MCDisassembler::Fail; 2581 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder))) 2582 return MCDisassembler::Fail; 2583 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder))) 2584 return MCDisassembler::Fail; 2585 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder))) 2586 return MCDisassembler::Fail; 2587 if (Rm != 0xF) { 2588 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2589 return MCDisassembler::Fail; 2590 } 2591 2592 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2593 return MCDisassembler::Fail; 2594 Inst.addOperand(MCOperand::CreateImm(align)); 2595 2596 if (Rm == 0xD) 2597 Inst.addOperand(MCOperand::CreateReg(0)); 2598 else if (Rm != 0xF) { 2599 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 2600 return MCDisassembler::Fail; 2601 } 2602 2603 return S; 2604 } 2605 2606 static DecodeStatus 2607 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn, 2608 uint64_t Address, const void *Decoder) { 2609 DecodeStatus S = MCDisassembler::Success; 2610 2611 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 2612 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 2613 unsigned imm = fieldFromInstruction32(Insn, 0, 4); 2614 imm |= fieldFromInstruction32(Insn, 16, 3) << 4; 2615 imm |= fieldFromInstruction32(Insn, 24, 1) << 7; 2616 imm |= fieldFromInstruction32(Insn, 8, 4) << 8; 2617 imm |= fieldFromInstruction32(Insn, 5, 1) << 12; 2618 unsigned Q = fieldFromInstruction32(Insn, 6, 1); 2619 2620 if (Q) { 2621 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder))) 2622 return MCDisassembler::Fail; 2623 } else { 2624 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2625 return MCDisassembler::Fail; 2626 } 2627 2628 Inst.addOperand(MCOperand::CreateImm(imm)); 2629 2630 switch (Inst.getOpcode()) { 2631 case ARM::VORRiv4i16: 2632 case ARM::VORRiv2i32: 2633 case ARM::VBICiv4i16: 2634 case ARM::VBICiv2i32: 2635 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2636 return MCDisassembler::Fail; 2637 break; 2638 case ARM::VORRiv8i16: 2639 case ARM::VORRiv4i32: 2640 case ARM::VBICiv8i16: 2641 case ARM::VBICiv4i32: 2642 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder))) 2643 return MCDisassembler::Fail; 2644 break; 2645 default: 2646 break; 2647 } 2648 2649 return S; 2650 } 2651 2652 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn, 2653 uint64_t Address, const void *Decoder) { 2654 DecodeStatus S = MCDisassembler::Success; 2655 2656 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 2657 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 2658 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 2659 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4; 2660 unsigned size = fieldFromInstruction32(Insn, 18, 2); 2661 2662 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder))) 2663 return MCDisassembler::Fail; 2664 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder))) 2665 return MCDisassembler::Fail; 2666 Inst.addOperand(MCOperand::CreateImm(8 << size)); 2667 2668 return S; 2669 } 2670 2671 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val, 2672 uint64_t Address, const void *Decoder) { 2673 Inst.addOperand(MCOperand::CreateImm(8 - Val)); 2674 return MCDisassembler::Success; 2675 } 2676 2677 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val, 2678 uint64_t Address, const void *Decoder) { 2679 Inst.addOperand(MCOperand::CreateImm(16 - Val)); 2680 return MCDisassembler::Success; 2681 } 2682 2683 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val, 2684 uint64_t Address, const void *Decoder) { 2685 Inst.addOperand(MCOperand::CreateImm(32 - Val)); 2686 return MCDisassembler::Success; 2687 } 2688 2689 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val, 2690 uint64_t Address, const void *Decoder) { 2691 Inst.addOperand(MCOperand::CreateImm(64 - Val)); 2692 return MCDisassembler::Success; 2693 } 2694 2695 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn, 2696 uint64_t Address, const void *Decoder) { 2697 DecodeStatus S = MCDisassembler::Success; 2698 2699 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 2700 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 2701 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 2702 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4; 2703 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 2704 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4; 2705 unsigned op = fieldFromInstruction32(Insn, 6, 1); 2706 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1; 2707 2708 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2709 return MCDisassembler::Fail; 2710 if (op) { 2711 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 2712 return MCDisassembler::Fail; // Writeback 2713 } 2714 2715 for (unsigned i = 0; i < length; ++i) { 2716 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder))) 2717 return MCDisassembler::Fail; 2718 } 2719 2720 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder))) 2721 return MCDisassembler::Fail; 2722 2723 return S; 2724 } 2725 2726 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn, 2727 uint64_t Address, const void *Decoder) { 2728 DecodeStatus S = MCDisassembler::Success; 2729 2730 unsigned dst = fieldFromInstruction16(Insn, 8, 3); 2731 unsigned imm = fieldFromInstruction16(Insn, 0, 8); 2732 2733 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder))) 2734 return MCDisassembler::Fail; 2735 2736 switch(Inst.getOpcode()) { 2737 default: 2738 return MCDisassembler::Fail; 2739 case ARM::tADR: 2740 break; // tADR does not explicitly represent the PC as an operand. 2741 case ARM::tADDrSPi: 2742 Inst.addOperand(MCOperand::CreateReg(ARM::SP)); 2743 break; 2744 } 2745 2746 Inst.addOperand(MCOperand::CreateImm(imm)); 2747 return S; 2748 } 2749 2750 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val, 2751 uint64_t Address, const void *Decoder) { 2752 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1))); 2753 return MCDisassembler::Success; 2754 } 2755 2756 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val, 2757 uint64_t Address, const void *Decoder) { 2758 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val))); 2759 return MCDisassembler::Success; 2760 } 2761 2762 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val, 2763 uint64_t Address, const void *Decoder) { 2764 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1))); 2765 return MCDisassembler::Success; 2766 } 2767 2768 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val, 2769 uint64_t Address, const void *Decoder) { 2770 DecodeStatus S = MCDisassembler::Success; 2771 2772 unsigned Rn = fieldFromInstruction32(Val, 0, 3); 2773 unsigned Rm = fieldFromInstruction32(Val, 3, 3); 2774 2775 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder))) 2776 return MCDisassembler::Fail; 2777 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder))) 2778 return MCDisassembler::Fail; 2779 2780 return S; 2781 } 2782 2783 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val, 2784 uint64_t Address, const void *Decoder) { 2785 DecodeStatus S = MCDisassembler::Success; 2786 2787 unsigned Rn = fieldFromInstruction32(Val, 0, 3); 2788 unsigned imm = fieldFromInstruction32(Val, 3, 5); 2789 2790 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder))) 2791 return MCDisassembler::Fail; 2792 Inst.addOperand(MCOperand::CreateImm(imm)); 2793 2794 return S; 2795 } 2796 2797 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val, 2798 uint64_t Address, const void *Decoder) { 2799 unsigned imm = Val << 2; 2800 2801 Inst.addOperand(MCOperand::CreateImm(imm)); 2802 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder); 2803 2804 return MCDisassembler::Success; 2805 } 2806 2807 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val, 2808 uint64_t Address, const void *Decoder) { 2809 Inst.addOperand(MCOperand::CreateReg(ARM::SP)); 2810 Inst.addOperand(MCOperand::CreateImm(Val)); 2811 2812 return MCDisassembler::Success; 2813 } 2814 2815 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val, 2816 uint64_t Address, const void *Decoder) { 2817 DecodeStatus S = MCDisassembler::Success; 2818 2819 unsigned Rn = fieldFromInstruction32(Val, 6, 4); 2820 unsigned Rm = fieldFromInstruction32(Val, 2, 4); 2821 unsigned imm = fieldFromInstruction32(Val, 0, 2); 2822 2823 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2824 return MCDisassembler::Fail; 2825 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))) 2826 return MCDisassembler::Fail; 2827 Inst.addOperand(MCOperand::CreateImm(imm)); 2828 2829 return S; 2830 } 2831 2832 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn, 2833 uint64_t Address, const void *Decoder) { 2834 DecodeStatus S = MCDisassembler::Success; 2835 2836 switch (Inst.getOpcode()) { 2837 case ARM::t2PLDs: 2838 case ARM::t2PLDWs: 2839 case ARM::t2PLIs: 2840 break; 2841 default: { 2842 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 2843 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder))) 2844 return MCDisassembler::Fail; 2845 } 2846 } 2847 2848 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 2849 if (Rn == 0xF) { 2850 switch (Inst.getOpcode()) { 2851 case ARM::t2LDRBs: 2852 Inst.setOpcode(ARM::t2LDRBpci); 2853 break; 2854 case ARM::t2LDRHs: 2855 Inst.setOpcode(ARM::t2LDRHpci); 2856 break; 2857 case ARM::t2LDRSHs: 2858 Inst.setOpcode(ARM::t2LDRSHpci); 2859 break; 2860 case ARM::t2LDRSBs: 2861 Inst.setOpcode(ARM::t2LDRSBpci); 2862 break; 2863 case ARM::t2PLDs: 2864 Inst.setOpcode(ARM::t2PLDi12); 2865 Inst.addOperand(MCOperand::CreateReg(ARM::PC)); 2866 break; 2867 default: 2868 return MCDisassembler::Fail; 2869 } 2870 2871 int imm = fieldFromInstruction32(Insn, 0, 12); 2872 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1; 2873 Inst.addOperand(MCOperand::CreateImm(imm)); 2874 2875 return S; 2876 } 2877 2878 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2); 2879 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2; 2880 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6; 2881 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder))) 2882 return MCDisassembler::Fail; 2883 2884 return S; 2885 } 2886 2887 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val, 2888 uint64_t Address, const void *Decoder) { 2889 int imm = Val & 0xFF; 2890 if (!(Val & 0x100)) imm *= -1; 2891 Inst.addOperand(MCOperand::CreateImm(imm << 2)); 2892 2893 return MCDisassembler::Success; 2894 } 2895 2896 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val, 2897 uint64_t Address, const void *Decoder) { 2898 DecodeStatus S = MCDisassembler::Success; 2899 2900 unsigned Rn = fieldFromInstruction32(Val, 9, 4); 2901 unsigned imm = fieldFromInstruction32(Val, 0, 9); 2902 2903 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2904 return MCDisassembler::Fail; 2905 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder))) 2906 return MCDisassembler::Fail; 2907 2908 return S; 2909 } 2910 2911 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val, 2912 uint64_t Address, const void *Decoder) { 2913 DecodeStatus S = MCDisassembler::Success; 2914 2915 unsigned Rn = fieldFromInstruction32(Val, 8, 4); 2916 unsigned imm = fieldFromInstruction32(Val, 0, 8); 2917 2918 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) 2919 return MCDisassembler::Fail; 2920 2921 Inst.addOperand(MCOperand::CreateImm(imm)); 2922 2923 return S; 2924 } 2925 2926 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val, 2927 uint64_t Address, const void *Decoder) { 2928 int imm = Val & 0xFF; 2929 if (Val == 0) 2930 imm = INT32_MIN; 2931 else if (!(Val & 0x100)) 2932 imm *= -1; 2933 Inst.addOperand(MCOperand::CreateImm(imm)); 2934 2935 return MCDisassembler::Success; 2936 } 2937 2938 2939 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val, 2940 uint64_t Address, const void *Decoder) { 2941 DecodeStatus S = MCDisassembler::Success; 2942 2943 unsigned Rn = fieldFromInstruction32(Val, 9, 4); 2944 unsigned imm = fieldFromInstruction32(Val, 0, 9); 2945 2946 // Some instructions always use an additive offset. 2947 switch (Inst.getOpcode()) { 2948 case ARM::t2LDRT: 2949 case ARM::t2LDRBT: 2950 case ARM::t2LDRHT: 2951 case ARM::t2LDRSBT: 2952 case ARM::t2LDRSHT: 2953 case ARM::t2STRT: 2954 case ARM::t2STRBT: 2955 case ARM::t2STRHT: 2956 imm |= 0x100; 2957 break; 2958 default: 2959 break; 2960 } 2961 2962 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2963 return MCDisassembler::Fail; 2964 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder))) 2965 return MCDisassembler::Fail; 2966 2967 return S; 2968 } 2969 2970 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn, 2971 uint64_t Address, const void *Decoder) { 2972 DecodeStatus S = MCDisassembler::Success; 2973 2974 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 2975 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 2976 unsigned addr = fieldFromInstruction32(Insn, 0, 8); 2977 addr |= fieldFromInstruction32(Insn, 9, 1) << 8; 2978 addr |= Rn << 9; 2979 unsigned load = fieldFromInstruction32(Insn, 20, 1); 2980 2981 if (!load) { 2982 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2983 return MCDisassembler::Fail; 2984 } 2985 2986 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder))) 2987 return MCDisassembler::Fail; 2988 2989 if (load) { 2990 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 2991 return MCDisassembler::Fail; 2992 } 2993 2994 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder))) 2995 return MCDisassembler::Fail; 2996 2997 return S; 2998 } 2999 3000 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val, 3001 uint64_t Address, const void *Decoder) { 3002 DecodeStatus S = MCDisassembler::Success; 3003 3004 unsigned Rn = fieldFromInstruction32(Val, 13, 4); 3005 unsigned imm = fieldFromInstruction32(Val, 0, 12); 3006 3007 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3008 return MCDisassembler::Fail; 3009 Inst.addOperand(MCOperand::CreateImm(imm)); 3010 3011 return S; 3012 } 3013 3014 3015 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn, 3016 uint64_t Address, const void *Decoder) { 3017 unsigned imm = fieldFromInstruction16(Insn, 0, 7); 3018 3019 Inst.addOperand(MCOperand::CreateReg(ARM::SP)); 3020 Inst.addOperand(MCOperand::CreateReg(ARM::SP)); 3021 Inst.addOperand(MCOperand::CreateImm(imm)); 3022 3023 return MCDisassembler::Success; 3024 } 3025 3026 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn, 3027 uint64_t Address, const void *Decoder) { 3028 DecodeStatus S = MCDisassembler::Success; 3029 3030 if (Inst.getOpcode() == ARM::tADDrSP) { 3031 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3); 3032 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3; 3033 3034 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder))) 3035 return MCDisassembler::Fail; 3036 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder))) 3037 return MCDisassembler::Fail; 3038 Inst.addOperand(MCOperand::CreateReg(ARM::SP)); 3039 } else if (Inst.getOpcode() == ARM::tADDspr) { 3040 unsigned Rm = fieldFromInstruction16(Insn, 3, 4); 3041 3042 Inst.addOperand(MCOperand::CreateReg(ARM::SP)); 3043 Inst.addOperand(MCOperand::CreateReg(ARM::SP)); 3044 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3045 return MCDisassembler::Fail; 3046 } 3047 3048 return S; 3049 } 3050 3051 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn, 3052 uint64_t Address, const void *Decoder) { 3053 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2; 3054 unsigned flags = fieldFromInstruction16(Insn, 0, 3); 3055 3056 Inst.addOperand(MCOperand::CreateImm(imod)); 3057 Inst.addOperand(MCOperand::CreateImm(flags)); 3058 3059 return MCDisassembler::Success; 3060 } 3061 3062 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn, 3063 uint64_t Address, const void *Decoder) { 3064 DecodeStatus S = MCDisassembler::Success; 3065 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3066 unsigned add = fieldFromInstruction32(Insn, 4, 1); 3067 3068 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3069 return MCDisassembler::Fail; 3070 Inst.addOperand(MCOperand::CreateImm(add)); 3071 3072 return S; 3073 } 3074 3075 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val, 3076 uint64_t Address, const void *Decoder) { 3077 if (!tryAddingSymbolicOperand(Address, 3078 (Address & ~2u) + SignExtend32<22>(Val << 1) + 4, 3079 true, 4, Inst, Decoder)) 3080 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1))); 3081 return MCDisassembler::Success; 3082 } 3083 3084 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val, 3085 uint64_t Address, const void *Decoder) { 3086 if (Val == 0xA || Val == 0xB) 3087 return MCDisassembler::Fail; 3088 3089 Inst.addOperand(MCOperand::CreateImm(Val)); 3090 return MCDisassembler::Success; 3091 } 3092 3093 static DecodeStatus 3094 DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Insn, 3095 uint64_t Address, const void *Decoder) { 3096 DecodeStatus S = MCDisassembler::Success; 3097 3098 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3099 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3100 3101 if (Rn == ARM::SP) S = MCDisassembler::SoftFail; 3102 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3103 return MCDisassembler::Fail; 3104 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))) 3105 return MCDisassembler::Fail; 3106 return S; 3107 } 3108 3109 static DecodeStatus 3110 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn, 3111 uint64_t Address, const void *Decoder) { 3112 DecodeStatus S = MCDisassembler::Success; 3113 3114 unsigned pred = fieldFromInstruction32(Insn, 22, 4); 3115 if (pred == 0xE || pred == 0xF) { 3116 unsigned opc = fieldFromInstruction32(Insn, 4, 28); 3117 switch (opc) { 3118 default: 3119 return MCDisassembler::Fail; 3120 case 0xf3bf8f4: 3121 Inst.setOpcode(ARM::t2DSB); 3122 break; 3123 case 0xf3bf8f5: 3124 Inst.setOpcode(ARM::t2DMB); 3125 break; 3126 case 0xf3bf8f6: 3127 Inst.setOpcode(ARM::t2ISB); 3128 break; 3129 } 3130 3131 unsigned imm = fieldFromInstruction32(Insn, 0, 4); 3132 return DecodeMemBarrierOption(Inst, imm, Address, Decoder); 3133 } 3134 3135 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1; 3136 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19; 3137 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18; 3138 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12; 3139 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20; 3140 3141 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder))) 3142 return MCDisassembler::Fail; 3143 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 3144 return MCDisassembler::Fail; 3145 3146 return S; 3147 } 3148 3149 // Decode a shifted immediate operand. These basically consist 3150 // of an 8-bit value, and a 4-bit directive that specifies either 3151 // a splat operation or a rotation. 3152 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val, 3153 uint64_t Address, const void *Decoder) { 3154 unsigned ctrl = fieldFromInstruction32(Val, 10, 2); 3155 if (ctrl == 0) { 3156 unsigned byte = fieldFromInstruction32(Val, 8, 2); 3157 unsigned imm = fieldFromInstruction32(Val, 0, 8); 3158 switch (byte) { 3159 case 0: 3160 Inst.addOperand(MCOperand::CreateImm(imm)); 3161 break; 3162 case 1: 3163 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm)); 3164 break; 3165 case 2: 3166 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8))); 3167 break; 3168 case 3: 3169 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) | 3170 (imm << 8) | imm)); 3171 break; 3172 } 3173 } else { 3174 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80; 3175 unsigned rot = fieldFromInstruction32(Val, 7, 5); 3176 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31)); 3177 Inst.addOperand(MCOperand::CreateImm(imm)); 3178 } 3179 3180 return MCDisassembler::Success; 3181 } 3182 3183 static DecodeStatus 3184 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val, 3185 uint64_t Address, const void *Decoder){ 3186 Inst.addOperand(MCOperand::CreateImm(Val << 1)); 3187 return MCDisassembler::Success; 3188 } 3189 3190 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val, 3191 uint64_t Address, const void *Decoder){ 3192 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1))); 3193 return MCDisassembler::Success; 3194 } 3195 3196 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val, 3197 uint64_t Address, const void *Decoder) { 3198 switch (Val) { 3199 default: 3200 return MCDisassembler::Fail; 3201 case 0xF: // SY 3202 case 0xE: // ST 3203 case 0xB: // ISH 3204 case 0xA: // ISHST 3205 case 0x7: // NSH 3206 case 0x6: // NSHST 3207 case 0x3: // OSH 3208 case 0x2: // OSHST 3209 break; 3210 } 3211 3212 Inst.addOperand(MCOperand::CreateImm(Val)); 3213 return MCDisassembler::Success; 3214 } 3215 3216 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val, 3217 uint64_t Address, const void *Decoder) { 3218 if (!Val) return MCDisassembler::Fail; 3219 Inst.addOperand(MCOperand::CreateImm(Val)); 3220 return MCDisassembler::Success; 3221 } 3222 3223 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn, 3224 uint64_t Address, const void *Decoder) { 3225 DecodeStatus S = MCDisassembler::Success; 3226 3227 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 3228 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3229 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 3230 3231 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail; 3232 3233 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 3234 return MCDisassembler::Fail; 3235 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder))) 3236 return MCDisassembler::Fail; 3237 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3238 return MCDisassembler::Fail; 3239 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 3240 return MCDisassembler::Fail; 3241 3242 return S; 3243 } 3244 3245 3246 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn, 3247 uint64_t Address, const void *Decoder){ 3248 DecodeStatus S = MCDisassembler::Success; 3249 3250 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 3251 unsigned Rt = fieldFromInstruction32(Insn, 0, 4); 3252 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3253 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 3254 3255 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder))) 3256 return MCDisassembler::Fail; 3257 3258 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail; 3259 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail; 3260 3261 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 3262 return MCDisassembler::Fail; 3263 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder))) 3264 return MCDisassembler::Fail; 3265 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3266 return MCDisassembler::Fail; 3267 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 3268 return MCDisassembler::Fail; 3269 3270 return S; 3271 } 3272 3273 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn, 3274 uint64_t Address, const void *Decoder) { 3275 DecodeStatus S = MCDisassembler::Success; 3276 3277 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3278 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 3279 unsigned imm = fieldFromInstruction32(Insn, 0, 12); 3280 imm |= fieldFromInstruction32(Insn, 16, 4) << 13; 3281 imm |= fieldFromInstruction32(Insn, 23, 1) << 12; 3282 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 3283 3284 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; 3285 3286 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 3287 return MCDisassembler::Fail; 3288 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3289 return MCDisassembler::Fail; 3290 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder))) 3291 return MCDisassembler::Fail; 3292 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 3293 return MCDisassembler::Fail; 3294 3295 return S; 3296 } 3297 3298 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn, 3299 uint64_t Address, const void *Decoder) { 3300 DecodeStatus S = MCDisassembler::Success; 3301 3302 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3303 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 3304 unsigned imm = fieldFromInstruction32(Insn, 0, 12); 3305 imm |= fieldFromInstruction32(Insn, 16, 4) << 13; 3306 imm |= fieldFromInstruction32(Insn, 23, 1) << 12; 3307 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 3308 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3309 3310 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; 3311 if (Rm == 0xF) S = MCDisassembler::SoftFail; 3312 3313 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 3314 return MCDisassembler::Fail; 3315 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3316 return MCDisassembler::Fail; 3317 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder))) 3318 return MCDisassembler::Fail; 3319 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 3320 return MCDisassembler::Fail; 3321 3322 return S; 3323 } 3324 3325 3326 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn, 3327 uint64_t Address, const void *Decoder) { 3328 DecodeStatus S = MCDisassembler::Success; 3329 3330 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3331 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 3332 unsigned imm = fieldFromInstruction32(Insn, 0, 12); 3333 imm |= fieldFromInstruction32(Insn, 16, 4) << 13; 3334 imm |= fieldFromInstruction32(Insn, 23, 1) << 12; 3335 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 3336 3337 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; 3338 3339 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3340 return MCDisassembler::Fail; 3341 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 3342 return MCDisassembler::Fail; 3343 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder))) 3344 return MCDisassembler::Fail; 3345 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 3346 return MCDisassembler::Fail; 3347 3348 return S; 3349 } 3350 3351 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn, 3352 uint64_t Address, const void *Decoder) { 3353 DecodeStatus S = MCDisassembler::Success; 3354 3355 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3356 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 3357 unsigned imm = fieldFromInstruction32(Insn, 0, 12); 3358 imm |= fieldFromInstruction32(Insn, 16, 4) << 13; 3359 imm |= fieldFromInstruction32(Insn, 23, 1) << 12; 3360 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 3361 3362 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail; 3363 3364 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3365 return MCDisassembler::Fail; 3366 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))) 3367 return MCDisassembler::Fail; 3368 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder))) 3369 return MCDisassembler::Fail; 3370 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 3371 return MCDisassembler::Fail; 3372 3373 return S; 3374 } 3375 3376 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn, 3377 uint64_t Address, const void *Decoder) { 3378 DecodeStatus S = MCDisassembler::Success; 3379 3380 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3381 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3382 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 3383 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 3384 unsigned size = fieldFromInstruction32(Insn, 10, 2); 3385 3386 unsigned align = 0; 3387 unsigned index = 0; 3388 switch (size) { 3389 default: 3390 return MCDisassembler::Fail; 3391 case 0: 3392 if (fieldFromInstruction32(Insn, 4, 1)) 3393 return MCDisassembler::Fail; // UNDEFINED 3394 index = fieldFromInstruction32(Insn, 5, 3); 3395 break; 3396 case 1: 3397 if (fieldFromInstruction32(Insn, 5, 1)) 3398 return MCDisassembler::Fail; // UNDEFINED 3399 index = fieldFromInstruction32(Insn, 6, 2); 3400 if (fieldFromInstruction32(Insn, 4, 1)) 3401 align = 2; 3402 break; 3403 case 2: 3404 if (fieldFromInstruction32(Insn, 6, 1)) 3405 return MCDisassembler::Fail; // UNDEFINED 3406 index = fieldFromInstruction32(Insn, 7, 1); 3407 if (fieldFromInstruction32(Insn, 4, 2) != 0) 3408 align = 4; 3409 } 3410 3411 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3412 return MCDisassembler::Fail; 3413 if (Rm != 0xF) { // Writeback 3414 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3415 return MCDisassembler::Fail; 3416 } 3417 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3418 return MCDisassembler::Fail; 3419 Inst.addOperand(MCOperand::CreateImm(align)); 3420 if (Rm != 0xF) { 3421 if (Rm != 0xD) { 3422 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3423 return MCDisassembler::Fail; 3424 } else 3425 Inst.addOperand(MCOperand::CreateReg(0)); 3426 } 3427 3428 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3429 return MCDisassembler::Fail; 3430 Inst.addOperand(MCOperand::CreateImm(index)); 3431 3432 return S; 3433 } 3434 3435 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn, 3436 uint64_t Address, const void *Decoder) { 3437 DecodeStatus S = MCDisassembler::Success; 3438 3439 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3440 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3441 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 3442 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 3443 unsigned size = fieldFromInstruction32(Insn, 10, 2); 3444 3445 unsigned align = 0; 3446 unsigned index = 0; 3447 switch (size) { 3448 default: 3449 return MCDisassembler::Fail; 3450 case 0: 3451 if (fieldFromInstruction32(Insn, 4, 1)) 3452 return MCDisassembler::Fail; // UNDEFINED 3453 index = fieldFromInstruction32(Insn, 5, 3); 3454 break; 3455 case 1: 3456 if (fieldFromInstruction32(Insn, 5, 1)) 3457 return MCDisassembler::Fail; // UNDEFINED 3458 index = fieldFromInstruction32(Insn, 6, 2); 3459 if (fieldFromInstruction32(Insn, 4, 1)) 3460 align = 2; 3461 break; 3462 case 2: 3463 if (fieldFromInstruction32(Insn, 6, 1)) 3464 return MCDisassembler::Fail; // UNDEFINED 3465 index = fieldFromInstruction32(Insn, 7, 1); 3466 if (fieldFromInstruction32(Insn, 4, 2) != 0) 3467 align = 4; 3468 } 3469 3470 if (Rm != 0xF) { // Writeback 3471 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3472 return MCDisassembler::Fail; 3473 } 3474 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3475 return MCDisassembler::Fail; 3476 Inst.addOperand(MCOperand::CreateImm(align)); 3477 if (Rm != 0xF) { 3478 if (Rm != 0xD) { 3479 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3480 return MCDisassembler::Fail; 3481 } else 3482 Inst.addOperand(MCOperand::CreateReg(0)); 3483 } 3484 3485 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3486 return MCDisassembler::Fail; 3487 Inst.addOperand(MCOperand::CreateImm(index)); 3488 3489 return S; 3490 } 3491 3492 3493 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn, 3494 uint64_t Address, const void *Decoder) { 3495 DecodeStatus S = MCDisassembler::Success; 3496 3497 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3498 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3499 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 3500 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 3501 unsigned size = fieldFromInstruction32(Insn, 10, 2); 3502 3503 unsigned align = 0; 3504 unsigned index = 0; 3505 unsigned inc = 1; 3506 switch (size) { 3507 default: 3508 return MCDisassembler::Fail; 3509 case 0: 3510 index = fieldFromInstruction32(Insn, 5, 3); 3511 if (fieldFromInstruction32(Insn, 4, 1)) 3512 align = 2; 3513 break; 3514 case 1: 3515 index = fieldFromInstruction32(Insn, 6, 2); 3516 if (fieldFromInstruction32(Insn, 4, 1)) 3517 align = 4; 3518 if (fieldFromInstruction32(Insn, 5, 1)) 3519 inc = 2; 3520 break; 3521 case 2: 3522 if (fieldFromInstruction32(Insn, 5, 1)) 3523 return MCDisassembler::Fail; // UNDEFINED 3524 index = fieldFromInstruction32(Insn, 7, 1); 3525 if (fieldFromInstruction32(Insn, 4, 1) != 0) 3526 align = 8; 3527 if (fieldFromInstruction32(Insn, 6, 1)) 3528 inc = 2; 3529 break; 3530 } 3531 3532 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3533 return MCDisassembler::Fail; 3534 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 3535 return MCDisassembler::Fail; 3536 if (Rm != 0xF) { // Writeback 3537 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3538 return MCDisassembler::Fail; 3539 } 3540 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3541 return MCDisassembler::Fail; 3542 Inst.addOperand(MCOperand::CreateImm(align)); 3543 if (Rm != 0xF) { 3544 if (Rm != 0xD) { 3545 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3546 return MCDisassembler::Fail; 3547 } else 3548 Inst.addOperand(MCOperand::CreateReg(0)); 3549 } 3550 3551 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3552 return MCDisassembler::Fail; 3553 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 3554 return MCDisassembler::Fail; 3555 Inst.addOperand(MCOperand::CreateImm(index)); 3556 3557 return S; 3558 } 3559 3560 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn, 3561 uint64_t Address, const void *Decoder) { 3562 DecodeStatus S = MCDisassembler::Success; 3563 3564 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3565 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3566 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 3567 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 3568 unsigned size = fieldFromInstruction32(Insn, 10, 2); 3569 3570 unsigned align = 0; 3571 unsigned index = 0; 3572 unsigned inc = 1; 3573 switch (size) { 3574 default: 3575 return MCDisassembler::Fail; 3576 case 0: 3577 index = fieldFromInstruction32(Insn, 5, 3); 3578 if (fieldFromInstruction32(Insn, 4, 1)) 3579 align = 2; 3580 break; 3581 case 1: 3582 index = fieldFromInstruction32(Insn, 6, 2); 3583 if (fieldFromInstruction32(Insn, 4, 1)) 3584 align = 4; 3585 if (fieldFromInstruction32(Insn, 5, 1)) 3586 inc = 2; 3587 break; 3588 case 2: 3589 if (fieldFromInstruction32(Insn, 5, 1)) 3590 return MCDisassembler::Fail; // UNDEFINED 3591 index = fieldFromInstruction32(Insn, 7, 1); 3592 if (fieldFromInstruction32(Insn, 4, 1) != 0) 3593 align = 8; 3594 if (fieldFromInstruction32(Insn, 6, 1)) 3595 inc = 2; 3596 break; 3597 } 3598 3599 if (Rm != 0xF) { // Writeback 3600 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3601 return MCDisassembler::Fail; 3602 } 3603 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3604 return MCDisassembler::Fail; 3605 Inst.addOperand(MCOperand::CreateImm(align)); 3606 if (Rm != 0xF) { 3607 if (Rm != 0xD) { 3608 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3609 return MCDisassembler::Fail; 3610 } else 3611 Inst.addOperand(MCOperand::CreateReg(0)); 3612 } 3613 3614 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3615 return MCDisassembler::Fail; 3616 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 3617 return MCDisassembler::Fail; 3618 Inst.addOperand(MCOperand::CreateImm(index)); 3619 3620 return S; 3621 } 3622 3623 3624 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn, 3625 uint64_t Address, const void *Decoder) { 3626 DecodeStatus S = MCDisassembler::Success; 3627 3628 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3629 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3630 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 3631 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 3632 unsigned size = fieldFromInstruction32(Insn, 10, 2); 3633 3634 unsigned align = 0; 3635 unsigned index = 0; 3636 unsigned inc = 1; 3637 switch (size) { 3638 default: 3639 return MCDisassembler::Fail; 3640 case 0: 3641 if (fieldFromInstruction32(Insn, 4, 1)) 3642 return MCDisassembler::Fail; // UNDEFINED 3643 index = fieldFromInstruction32(Insn, 5, 3); 3644 break; 3645 case 1: 3646 if (fieldFromInstruction32(Insn, 4, 1)) 3647 return MCDisassembler::Fail; // UNDEFINED 3648 index = fieldFromInstruction32(Insn, 6, 2); 3649 if (fieldFromInstruction32(Insn, 5, 1)) 3650 inc = 2; 3651 break; 3652 case 2: 3653 if (fieldFromInstruction32(Insn, 4, 2)) 3654 return MCDisassembler::Fail; // UNDEFINED 3655 index = fieldFromInstruction32(Insn, 7, 1); 3656 if (fieldFromInstruction32(Insn, 6, 1)) 3657 inc = 2; 3658 break; 3659 } 3660 3661 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3662 return MCDisassembler::Fail; 3663 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 3664 return MCDisassembler::Fail; 3665 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 3666 return MCDisassembler::Fail; 3667 3668 if (Rm != 0xF) { // Writeback 3669 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3670 return MCDisassembler::Fail; 3671 } 3672 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3673 return MCDisassembler::Fail; 3674 Inst.addOperand(MCOperand::CreateImm(align)); 3675 if (Rm != 0xF) { 3676 if (Rm != 0xD) { 3677 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3678 return MCDisassembler::Fail; 3679 } else 3680 Inst.addOperand(MCOperand::CreateReg(0)); 3681 } 3682 3683 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3684 return MCDisassembler::Fail; 3685 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 3686 return MCDisassembler::Fail; 3687 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 3688 return MCDisassembler::Fail; 3689 Inst.addOperand(MCOperand::CreateImm(index)); 3690 3691 return S; 3692 } 3693 3694 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn, 3695 uint64_t Address, const void *Decoder) { 3696 DecodeStatus S = MCDisassembler::Success; 3697 3698 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3699 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3700 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 3701 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 3702 unsigned size = fieldFromInstruction32(Insn, 10, 2); 3703 3704 unsigned align = 0; 3705 unsigned index = 0; 3706 unsigned inc = 1; 3707 switch (size) { 3708 default: 3709 return MCDisassembler::Fail; 3710 case 0: 3711 if (fieldFromInstruction32(Insn, 4, 1)) 3712 return MCDisassembler::Fail; // UNDEFINED 3713 index = fieldFromInstruction32(Insn, 5, 3); 3714 break; 3715 case 1: 3716 if (fieldFromInstruction32(Insn, 4, 1)) 3717 return MCDisassembler::Fail; // UNDEFINED 3718 index = fieldFromInstruction32(Insn, 6, 2); 3719 if (fieldFromInstruction32(Insn, 5, 1)) 3720 inc = 2; 3721 break; 3722 case 2: 3723 if (fieldFromInstruction32(Insn, 4, 2)) 3724 return MCDisassembler::Fail; // UNDEFINED 3725 index = fieldFromInstruction32(Insn, 7, 1); 3726 if (fieldFromInstruction32(Insn, 6, 1)) 3727 inc = 2; 3728 break; 3729 } 3730 3731 if (Rm != 0xF) { // Writeback 3732 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3733 return MCDisassembler::Fail; 3734 } 3735 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3736 return MCDisassembler::Fail; 3737 Inst.addOperand(MCOperand::CreateImm(align)); 3738 if (Rm != 0xF) { 3739 if (Rm != 0xD) { 3740 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3741 return MCDisassembler::Fail; 3742 } else 3743 Inst.addOperand(MCOperand::CreateReg(0)); 3744 } 3745 3746 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3747 return MCDisassembler::Fail; 3748 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 3749 return MCDisassembler::Fail; 3750 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 3751 return MCDisassembler::Fail; 3752 Inst.addOperand(MCOperand::CreateImm(index)); 3753 3754 return S; 3755 } 3756 3757 3758 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn, 3759 uint64_t Address, const void *Decoder) { 3760 DecodeStatus S = MCDisassembler::Success; 3761 3762 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3763 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3764 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 3765 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 3766 unsigned size = fieldFromInstruction32(Insn, 10, 2); 3767 3768 unsigned align = 0; 3769 unsigned index = 0; 3770 unsigned inc = 1; 3771 switch (size) { 3772 default: 3773 return MCDisassembler::Fail; 3774 case 0: 3775 if (fieldFromInstruction32(Insn, 4, 1)) 3776 align = 4; 3777 index = fieldFromInstruction32(Insn, 5, 3); 3778 break; 3779 case 1: 3780 if (fieldFromInstruction32(Insn, 4, 1)) 3781 align = 8; 3782 index = fieldFromInstruction32(Insn, 6, 2); 3783 if (fieldFromInstruction32(Insn, 5, 1)) 3784 inc = 2; 3785 break; 3786 case 2: 3787 if (fieldFromInstruction32(Insn, 4, 2)) 3788 align = 4 << fieldFromInstruction32(Insn, 4, 2); 3789 index = fieldFromInstruction32(Insn, 7, 1); 3790 if (fieldFromInstruction32(Insn, 6, 1)) 3791 inc = 2; 3792 break; 3793 } 3794 3795 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3796 return MCDisassembler::Fail; 3797 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 3798 return MCDisassembler::Fail; 3799 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 3800 return MCDisassembler::Fail; 3801 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder))) 3802 return MCDisassembler::Fail; 3803 3804 if (Rm != 0xF) { // Writeback 3805 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3806 return MCDisassembler::Fail; 3807 } 3808 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3809 return MCDisassembler::Fail; 3810 Inst.addOperand(MCOperand::CreateImm(align)); 3811 if (Rm != 0xF) { 3812 if (Rm != 0xD) { 3813 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3814 return MCDisassembler::Fail; 3815 } else 3816 Inst.addOperand(MCOperand::CreateReg(0)); 3817 } 3818 3819 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3820 return MCDisassembler::Fail; 3821 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 3822 return MCDisassembler::Fail; 3823 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 3824 return MCDisassembler::Fail; 3825 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder))) 3826 return MCDisassembler::Fail; 3827 Inst.addOperand(MCOperand::CreateImm(index)); 3828 3829 return S; 3830 } 3831 3832 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn, 3833 uint64_t Address, const void *Decoder) { 3834 DecodeStatus S = MCDisassembler::Success; 3835 3836 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3837 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3838 unsigned Rd = fieldFromInstruction32(Insn, 12, 4); 3839 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4; 3840 unsigned size = fieldFromInstruction32(Insn, 10, 2); 3841 3842 unsigned align = 0; 3843 unsigned index = 0; 3844 unsigned inc = 1; 3845 switch (size) { 3846 default: 3847 return MCDisassembler::Fail; 3848 case 0: 3849 if (fieldFromInstruction32(Insn, 4, 1)) 3850 align = 4; 3851 index = fieldFromInstruction32(Insn, 5, 3); 3852 break; 3853 case 1: 3854 if (fieldFromInstruction32(Insn, 4, 1)) 3855 align = 8; 3856 index = fieldFromInstruction32(Insn, 6, 2); 3857 if (fieldFromInstruction32(Insn, 5, 1)) 3858 inc = 2; 3859 break; 3860 case 2: 3861 if (fieldFromInstruction32(Insn, 4, 2)) 3862 align = 4 << fieldFromInstruction32(Insn, 4, 2); 3863 index = fieldFromInstruction32(Insn, 7, 1); 3864 if (fieldFromInstruction32(Insn, 6, 1)) 3865 inc = 2; 3866 break; 3867 } 3868 3869 if (Rm != 0xF) { // Writeback 3870 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3871 return MCDisassembler::Fail; 3872 } 3873 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))) 3874 return MCDisassembler::Fail; 3875 Inst.addOperand(MCOperand::CreateImm(align)); 3876 if (Rm != 0xF) { 3877 if (Rm != 0xD) { 3878 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))) 3879 return MCDisassembler::Fail; 3880 } else 3881 Inst.addOperand(MCOperand::CreateReg(0)); 3882 } 3883 3884 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder))) 3885 return MCDisassembler::Fail; 3886 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder))) 3887 return MCDisassembler::Fail; 3888 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder))) 3889 return MCDisassembler::Fail; 3890 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder))) 3891 return MCDisassembler::Fail; 3892 Inst.addOperand(MCOperand::CreateImm(index)); 3893 3894 return S; 3895 } 3896 3897 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn, 3898 uint64_t Address, const void *Decoder) { 3899 DecodeStatus S = MCDisassembler::Success; 3900 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 3901 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4); 3902 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3903 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 3904 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4; 3905 3906 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F) 3907 S = MCDisassembler::SoftFail; 3908 3909 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder))) 3910 return MCDisassembler::Fail; 3911 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder))) 3912 return MCDisassembler::Fail; 3913 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder))) 3914 return MCDisassembler::Fail; 3915 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder))) 3916 return MCDisassembler::Fail; 3917 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 3918 return MCDisassembler::Fail; 3919 3920 return S; 3921 } 3922 3923 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn, 3924 uint64_t Address, const void *Decoder) { 3925 DecodeStatus S = MCDisassembler::Success; 3926 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 3927 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4); 3928 unsigned Rm = fieldFromInstruction32(Insn, 0, 4); 3929 unsigned pred = fieldFromInstruction32(Insn, 28, 4); 3930 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4; 3931 3932 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F) 3933 S = MCDisassembler::SoftFail; 3934 3935 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder))) 3936 return MCDisassembler::Fail; 3937 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder))) 3938 return MCDisassembler::Fail; 3939 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder))) 3940 return MCDisassembler::Fail; 3941 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder))) 3942 return MCDisassembler::Fail; 3943 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) 3944 return MCDisassembler::Fail; 3945 3946 return S; 3947 } 3948 3949 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn, 3950 uint64_t Address, const void *Decoder) { 3951 DecodeStatus S = MCDisassembler::Success; 3952 unsigned pred = fieldFromInstruction16(Insn, 4, 4); 3953 // The InstPrinter needs to have the low bit of the predicate in 3954 // the mask operand to be able to print it properly. 3955 unsigned mask = fieldFromInstruction16(Insn, 0, 5); 3956 3957 if (pred == 0xF) { 3958 pred = 0xE; 3959 S = MCDisassembler::SoftFail; 3960 } 3961 3962 if ((mask & 0xF) == 0) { 3963 // Preserve the high bit of the mask, which is the low bit of 3964 // the predicate. 3965 mask &= 0x10; 3966 mask |= 0x8; 3967 S = MCDisassembler::SoftFail; 3968 } 3969 3970 Inst.addOperand(MCOperand::CreateImm(pred)); 3971 Inst.addOperand(MCOperand::CreateImm(mask)); 3972 return S; 3973 } 3974 3975 static DecodeStatus 3976 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn, 3977 uint64_t Address, const void *Decoder) { 3978 DecodeStatus S = MCDisassembler::Success; 3979 3980 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 3981 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4); 3982 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 3983 unsigned addr = fieldFromInstruction32(Insn, 0, 8); 3984 unsigned W = fieldFromInstruction32(Insn, 21, 1); 3985 unsigned U = fieldFromInstruction32(Insn, 23, 1); 3986 unsigned P = fieldFromInstruction32(Insn, 24, 1); 3987 bool writeback = (W == 1) | (P == 0); 3988 3989 addr |= (U << 8) | (Rn << 9); 3990 3991 if (writeback && (Rn == Rt || Rn == Rt2)) 3992 Check(S, MCDisassembler::SoftFail); 3993 if (Rt == Rt2) 3994 Check(S, MCDisassembler::SoftFail); 3995 3996 // Rt 3997 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder))) 3998 return MCDisassembler::Fail; 3999 // Rt2 4000 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder))) 4001 return MCDisassembler::Fail; 4002 // Writeback operand 4003 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder))) 4004 return MCDisassembler::Fail; 4005 // addr 4006 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder))) 4007 return MCDisassembler::Fail; 4008 4009 return S; 4010 } 4011 4012 static DecodeStatus 4013 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn, 4014 uint64_t Address, const void *Decoder) { 4015 DecodeStatus S = MCDisassembler::Success; 4016 4017 unsigned Rt = fieldFromInstruction32(Insn, 12, 4); 4018 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4); 4019 unsigned Rn = fieldFromInstruction32(Insn, 16, 4); 4020 unsigned addr = fieldFromInstruction32(Insn, 0, 8); 4021 unsigned W = fieldFromInstruction32(Insn, 21, 1); 4022 unsigned U = fieldFromInstruction32(Insn, 23, 1); 4023 unsigned P = fieldFromInstruction32(Insn, 24, 1); 4024 bool writeback = (W == 1) | (P == 0); 4025 4026 addr |= (U << 8) | (Rn << 9); 4027 4028 if (writeback && (Rn == Rt || Rn == Rt2)) 4029 Check(S, MCDisassembler::SoftFail); 4030 4031 // Writeback operand 4032 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder))) 4033 return MCDisassembler::Fail; 4034 // Rt 4035 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder))) 4036 return MCDisassembler::Fail; 4037 // Rt2 4038 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder))) 4039 return MCDisassembler::Fail; 4040 // addr 4041 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder))) 4042 return MCDisassembler::Fail; 4043 4044 return S; 4045 } 4046 4047 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn, 4048 uint64_t Address, const void *Decoder) { 4049 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1); 4050 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1); 4051 if (sign1 != sign2) return MCDisassembler::Fail; 4052 4053 unsigned Val = fieldFromInstruction32(Insn, 0, 8); 4054 Val |= fieldFromInstruction32(Insn, 12, 3) << 8; 4055 Val |= fieldFromInstruction32(Insn, 26, 1) << 11; 4056 Val |= sign1 << 12; 4057 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val))); 4058 4059 return MCDisassembler::Success; 4060 } 4061 4062 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, uint32_t Val, 4063 uint64_t Address, 4064 const void *Decoder) { 4065 DecodeStatus S = MCDisassembler::Success; 4066 4067 // Shift of "asr #32" is not allowed in Thumb2 mode. 4068 if (Val == 0x20) S = MCDisassembler::SoftFail; 4069 Inst.addOperand(MCOperand::CreateImm(Val)); 4070 return S; 4071 } 4072 4073
