1 //===-- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #define DEBUG_TYPE "arm-disassembler"
12 #include "llvm/MC/MCDisassembler.h"
13 #include "MCTargetDesc/ARMAddressingModes.h"
14 #include "MCTargetDesc/ARMBaseInfo.h"
15 #include "MCTargetDesc/ARMMCExpr.h"
16 #include "llvm/MC/MCContext.h"
17 #include "llvm/MC/MCExpr.h"
18 #include "llvm/MC/MCFixedLenDisassembler.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/MC/MCInstrDesc.h"
21 #include "llvm/MC/MCSubtargetInfo.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/LEB128.h"
25 #include "llvm/Support/MemoryObject.h"
26 #include "llvm/Support/TargetRegistry.h"
27 #include "llvm/Support/raw_ostream.h"
32 typedef MCDisassembler::DecodeStatus DecodeStatus;
35 // Handles the condition code status of instructions in IT blocks
39 // Returns the condition code for instruction in IT block
41 unsigned CC = ARMCC::AL;
47 // Advances the IT block state to the next T or E
48 void advanceITState() {
52 // Returns true if the current instruction is in an IT block
53 bool instrInITBlock() {
54 return !ITStates.empty();
57 // Returns true if current instruction is the last instruction in an IT block
58 bool instrLastInITBlock() {
59 return ITStates.size() == 1;
62 // Called when decoding an IT instruction. Sets the IT state for the following
63 // instructions that for the IT block. Firstcond and Mask correspond to the
64 // fields in the IT instruction encoding.
65 void setITState(char Firstcond, char Mask) {
66 // (3 - the number of trailing zeros) is the number of then / else.
67 unsigned CondBit0 = Firstcond & 1;
68 unsigned NumTZ = CountTrailingZeros_32(Mask);
69 unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf);
70 assert(NumTZ <= 3 && "Invalid IT mask!");
71 // push condition codes onto the stack the correct order for the pops
72 for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) {
73 bool T = ((Mask >> Pos) & 1) == CondBit0;
75 ITStates.push_back(CCBits);
77 ITStates.push_back(CCBits ^ 1);
79 ITStates.push_back(CCBits);
83 std::vector<unsigned char> ITStates;
88 /// ARMDisassembler - ARM disassembler for all ARM platforms.
89 class ARMDisassembler : public MCDisassembler {
91 /// Constructor - Initializes the disassembler.
93 ARMDisassembler(const MCSubtargetInfo &STI) :
100 /// getInstruction - See MCDisassembler.
101 DecodeStatus getInstruction(MCInst &instr,
103 const MemoryObject ®ion,
105 raw_ostream &vStream,
106 raw_ostream &cStream) const;
109 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
110 class ThumbDisassembler : public MCDisassembler {
112 /// Constructor - Initializes the disassembler.
114 ThumbDisassembler(const MCSubtargetInfo &STI) :
115 MCDisassembler(STI) {
118 ~ThumbDisassembler() {
121 /// getInstruction - See MCDisassembler.
122 DecodeStatus getInstruction(MCInst &instr,
124 const MemoryObject ®ion,
126 raw_ostream &vStream,
127 raw_ostream &cStream) const;
130 mutable ITStatus ITBlock;
131 DecodeStatus AddThumbPredicate(MCInst&) const;
132 void UpdateThumbVFPPredicate(MCInst&) const;
136 static bool Check(DecodeStatus &Out, DecodeStatus In) {
138 case MCDisassembler::Success:
139 // Out stays the same.
141 case MCDisassembler::SoftFail:
144 case MCDisassembler::Fail:
148 llvm_unreachable("Invalid DecodeStatus!");
152 // Forward declare these because the autogenerated code will reference them.
153 // Definitions are further down.
154 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
155 uint64_t Address, const void *Decoder);
156 static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
157 unsigned RegNo, uint64_t Address,
158 const void *Decoder);
159 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
160 uint64_t Address, const void *Decoder);
161 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
162 uint64_t Address, const void *Decoder);
163 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
164 uint64_t Address, const void *Decoder);
165 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
166 uint64_t Address, const void *Decoder);
167 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
168 uint64_t Address, const void *Decoder);
169 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
170 uint64_t Address, const void *Decoder);
171 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
174 const void *Decoder);
175 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
176 uint64_t Address, const void *Decoder);
177 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
178 uint64_t Address, const void *Decoder);
179 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
180 unsigned RegNo, uint64_t Address,
181 const void *Decoder);
183 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
184 uint64_t Address, const void *Decoder);
185 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
186 uint64_t Address, const void *Decoder);
187 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
188 uint64_t Address, const void *Decoder);
189 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
190 uint64_t Address, const void *Decoder);
191 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
192 uint64_t Address, const void *Decoder);
193 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
194 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
203 const void *Decoder);
204 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
205 uint64_t Address, const void *Decoder);
206 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
207 uint64_t Address, const void *Decoder);
208 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
209 uint64_t Address, const void *Decoder);
210 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
211 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
216 const void *Decoder);
217 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
218 uint64_t Address, const void *Decoder);
219 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
220 uint64_t Address, const void *Decoder);
221 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
222 uint64_t Address, const void *Decoder);
223 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
224 uint64_t Address, const void *Decoder);
225 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
226 uint64_t Address, const void *Decoder);
227 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
228 uint64_t Address, const void *Decoder);
229 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
230 uint64_t Address, const void *Decoder);
231 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
232 uint64_t Address, const void *Decoder);
233 static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
234 uint64_t Address, const void *Decoder);
235 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
236 uint64_t Address, const void *Decoder);
237 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
238 uint64_t Address, const void *Decoder);
239 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
240 uint64_t Address, const void *Decoder);
241 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
242 uint64_t Address, const void *Decoder);
243 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
244 uint64_t Address, const void *Decoder);
245 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
246 uint64_t Address, const void *Decoder);
247 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
248 uint64_t Address, const void *Decoder);
249 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
250 uint64_t Address, const void *Decoder);
251 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
252 uint64_t Address, const void *Decoder);
253 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
254 uint64_t Address, const void *Decoder);
255 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
256 uint64_t Address, const void *Decoder);
257 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
258 uint64_t Address, const void *Decoder);
259 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
260 uint64_t Address, const void *Decoder);
261 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
262 uint64_t Address, const void *Decoder);
263 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
264 uint64_t Address, const void *Decoder);
265 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
266 uint64_t Address, const void *Decoder);
267 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
268 uint64_t Address, const void *Decoder);
269 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
270 uint64_t Address, const void *Decoder);
271 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
272 uint64_t Address, const void *Decoder);
273 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
274 uint64_t Address, const void *Decoder);
275 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
276 uint64_t Address, const void *Decoder);
277 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
278 uint64_t Address, const void *Decoder);
279 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
280 uint64_t Address, const void *Decoder);
281 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
282 uint64_t Address, const void *Decoder);
283 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
284 uint64_t Address, const void *Decoder);
285 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
286 uint64_t Address, const void *Decoder);
287 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
288 uint64_t Address, const void *Decoder);
289 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
290 uint64_t Address, const void *Decoder);
291 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
292 uint64_t Address, const void *Decoder);
293 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
294 uint64_t Address, const void *Decoder);
295 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
296 uint64_t Address, const void *Decoder);
297 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
298 uint64_t Address, const void *Decoder);
299 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
300 uint64_t Address, const void *Decoder);
301 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
302 uint64_t Address, const void *Decoder);
303 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
304 uint64_t Address, const void *Decoder);
305 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
306 uint64_t Address, const void *Decoder);
307 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
308 uint64_t Address, const void *Decoder);
309 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
310 uint64_t Address, const void *Decoder);
311 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
312 const void *Decoder);
315 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
316 uint64_t Address, const void *Decoder);
317 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
318 uint64_t Address, const void *Decoder);
319 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
320 uint64_t Address, const void *Decoder);
321 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
322 uint64_t Address, const void *Decoder);
323 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
324 uint64_t Address, const void *Decoder);
325 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
326 uint64_t Address, const void *Decoder);
327 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
328 uint64_t Address, const void *Decoder);
329 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
330 uint64_t Address, const void *Decoder);
331 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
332 uint64_t Address, const void *Decoder);
333 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
334 uint64_t Address, const void *Decoder);
335 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
336 uint64_t Address, const void *Decoder);
337 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
338 uint64_t Address, const void *Decoder);
339 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
340 uint64_t Address, const void *Decoder);
341 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
342 uint64_t Address, const void *Decoder);
343 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
344 uint64_t Address, const void *Decoder);
345 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
346 uint64_t Address, const void *Decoder);
347 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
348 uint64_t Address, const void *Decoder);
349 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
350 uint64_t Address, const void *Decoder);
351 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
352 uint64_t Address, const void *Decoder);
353 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
354 uint64_t Address, const void *Decoder);
355 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
356 uint64_t Address, const void *Decoder);
357 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
358 uint64_t Address, const void *Decoder);
359 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
360 uint64_t Address, const void *Decoder);
361 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
362 uint64_t Address, const void *Decoder);
363 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
364 uint64_t Address, const void *Decoder);
365 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
366 uint64_t Address, const void *Decoder);
367 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
368 uint64_t Address, const void *Decoder);
369 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
370 uint64_t Address, const void *Decoder);
371 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
372 uint64_t Address, const void *Decoder);
373 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
374 uint64_t Address, const void *Decoder);
375 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
376 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
379 uint64_t Address, const void *Decoder);
380 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
381 uint64_t Address, const void *Decoder);
382 #include "ARMGenDisassemblerTables.inc"
384 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
385 return new ARMDisassembler(STI);
388 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
389 return new ThumbDisassembler(STI);
392 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
393 const MemoryObject &Region,
396 raw_ostream &cs) const {
401 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
402 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
404 // We want to read exactly 4 bytes of data.
405 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
407 return MCDisassembler::Fail;
410 // Encoded as a small-endian 32-bit word in the stream.
411 uint32_t insn = (bytes[3] << 24) |
416 // Calling the auto-generated decoder function.
417 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
419 if (result != MCDisassembler::Fail) {
424 // VFP and NEON instructions, similarly, are shared between ARM
427 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
428 if (result != MCDisassembler::Fail) {
434 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
436 if (result != MCDisassembler::Fail) {
438 // Add a fake predicate operand, because we share these instruction
439 // definitions with Thumb2 where these instructions are predicable.
440 if (!DecodePredicateOperand(MI, 0xE, Address, this))
441 return MCDisassembler::Fail;
446 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
448 if (result != MCDisassembler::Fail) {
450 // Add a fake predicate operand, because we share these instruction
451 // definitions with Thumb2 where these instructions are predicable.
452 if (!DecodePredicateOperand(MI, 0xE, Address, this))
453 return MCDisassembler::Fail;
458 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
460 if (result != MCDisassembler::Fail) {
462 // Add a fake predicate operand, because we share these instruction
463 // definitions with Thumb2 where these instructions are predicable.
464 if (!DecodePredicateOperand(MI, 0xE, Address, this))
465 return MCDisassembler::Fail;
472 return MCDisassembler::Fail;
476 extern const MCInstrDesc ARMInsts[];
479 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
480 /// immediate Value in the MCInst. The immediate Value has had any PC
481 /// adjustment made by the caller. If the instruction is a branch instruction
482 /// then isBranch is true, else false. If the getOpInfo() function was set as
483 /// part of the setupForSymbolicDisassembly() call then that function is called
484 /// to get any symbolic information at the Address for this instruction. If
485 /// that returns non-zero then the symbolic information it returns is used to
486 /// create an MCExpr and that is added as an operand to the MCInst. If
487 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
488 /// Value is done and if a symbol is found an MCExpr is created with that, else
489 /// an MCExpr with Value is created. This function returns true if it adds an
490 /// operand to the MCInst and false otherwise.
491 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
492 bool isBranch, uint64_t InstSize,
493 MCInst &MI, const void *Decoder) {
494 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
495 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
496 struct LLVMOpInfo1 SymbolicOp;
497 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
498 SymbolicOp.Value = Value;
499 void *DisInfo = Dis->getDisInfoBlock();
502 !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
503 // Clear SymbolicOp.Value from above and also all other fields.
504 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
505 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
508 uint64_t ReferenceType;
510 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
512 ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
513 const char *ReferenceName;
514 uint64_t SymbolValue = 0x00000000ffffffffULL & Value;
515 const char *Name = SymbolLookUp(DisInfo, SymbolValue, &ReferenceType,
516 Address, &ReferenceName);
518 SymbolicOp.AddSymbol.Name = Name;
519 SymbolicOp.AddSymbol.Present = true;
521 // For branches always create an MCExpr so it gets printed as hex address.
523 SymbolicOp.Value = Value;
525 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
526 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
527 if (!Name && !isBranch)
531 MCContext *Ctx = Dis->getMCContext();
532 const MCExpr *Add = NULL;
533 if (SymbolicOp.AddSymbol.Present) {
534 if (SymbolicOp.AddSymbol.Name) {
535 StringRef Name(SymbolicOp.AddSymbol.Name);
536 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
537 Add = MCSymbolRefExpr::Create(Sym, *Ctx);
539 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
543 const MCExpr *Sub = NULL;
544 if (SymbolicOp.SubtractSymbol.Present) {
545 if (SymbolicOp.SubtractSymbol.Name) {
546 StringRef Name(SymbolicOp.SubtractSymbol.Name);
547 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
548 Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
550 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
554 const MCExpr *Off = NULL;
555 if (SymbolicOp.Value != 0)
556 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
562 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
564 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
566 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
571 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
578 Expr = MCConstantExpr::Create(0, *Ctx);
581 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
582 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
583 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
584 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
585 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
586 MI.addOperand(MCOperand::CreateExpr(Expr));
588 llvm_unreachable("bad SymbolicOp.VariantKind");
593 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
594 /// referenced by a load instruction with the base register that is the Pc.
595 /// These can often be values in a literal pool near the Address of the
596 /// instruction. The Address of the instruction and its immediate Value are
597 /// used as a possible literal pool entry. The SymbolLookUp call back will
598 /// return the name of a symbol referenced by the literal pool's entry if
599 /// the referenced address is that of a symbol. Or it will return a pointer to
600 /// a literal 'C' string if the referenced address of the literal pool's entry
601 /// is an address into a section with 'C' string literals.
602 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
603 const void *Decoder) {
604 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
605 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
607 void *DisInfo = Dis->getDisInfoBlock();
608 uint64_t ReferenceType;
609 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
610 const char *ReferenceName;
611 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
612 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
613 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
614 (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
618 // Thumb1 instructions don't have explicit S bits. Rather, they
619 // implicitly set CPSR. Since it's not represented in the encoding, the
620 // auto-generated decoder won't inject the CPSR operand. We need to fix
621 // that as a post-pass.
622 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
623 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
624 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
625 MCInst::iterator I = MI.begin();
626 for (unsigned i = 0; i < NumOps; ++i, ++I) {
627 if (I == MI.end()) break;
628 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
629 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
630 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
635 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
638 // Most Thumb instructions don't have explicit predicates in the
639 // encoding, but rather get their predicates from IT context. We need
640 // to fix up the predicate operands using this context information as a
642 MCDisassembler::DecodeStatus
643 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
644 MCDisassembler::DecodeStatus S = Success;
646 // A few instructions actually have predicates encoded in them. Don't
647 // try to overwrite it if we're seeing one of those.
648 switch (MI.getOpcode()) {
659 // Some instructions (mostly conditional branches) are not
660 // allowed in IT blocks.
661 if (ITBlock.instrInITBlock())
670 // Some instructions (mostly unconditional branches) can
671 // only appears at the end of, or outside of, an IT.
672 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
679 // If we're in an IT block, base the predicate on that. Otherwise,
680 // assume a predicate of AL.
682 CC = ITBlock.getITCC();
685 if (ITBlock.instrInITBlock())
686 ITBlock.advanceITState();
688 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
689 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
690 MCInst::iterator I = MI.begin();
691 for (unsigned i = 0; i < NumOps; ++i, ++I) {
692 if (I == MI.end()) break;
693 if (OpInfo[i].isPredicate()) {
694 I = MI.insert(I, MCOperand::CreateImm(CC));
697 MI.insert(I, MCOperand::CreateReg(0));
699 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
704 I = MI.insert(I, MCOperand::CreateImm(CC));
707 MI.insert(I, MCOperand::CreateReg(0));
709 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
714 // Thumb VFP instructions are a special case. Because we share their
715 // encodings between ARM and Thumb modes, and they are predicable in ARM
716 // mode, the auto-generated decoder will give them an (incorrect)
717 // predicate operand. We need to rewrite these operands based on the IT
718 // context as a post-pass.
719 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
721 CC = ITBlock.getITCC();
722 if (ITBlock.instrInITBlock())
723 ITBlock.advanceITState();
725 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
726 MCInst::iterator I = MI.begin();
727 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
728 for (unsigned i = 0; i < NumOps; ++i, ++I) {
729 if (OpInfo[i].isPredicate() ) {
735 I->setReg(ARM::CPSR);
741 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
742 const MemoryObject &Region,
745 raw_ostream &cs) const {
750 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
751 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
753 // We want to read exactly 2 bytes of data.
754 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
756 return MCDisassembler::Fail;
759 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
760 DecodeStatus result = decodeInstruction(DecoderTableThumb16, MI, insn16,
762 if (result != MCDisassembler::Fail) {
764 Check(result, AddThumbPredicate(MI));
769 result = decodeInstruction(DecoderTableThumbSBit16, MI, insn16,
773 bool InITBlock = ITBlock.instrInITBlock();
774 Check(result, AddThumbPredicate(MI));
775 AddThumb1SBit(MI, InITBlock);
780 result = decodeInstruction(DecoderTableThumb216, MI, insn16,
782 if (result != MCDisassembler::Fail) {
785 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
786 // the Thumb predicate.
787 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
788 result = MCDisassembler::SoftFail;
790 Check(result, AddThumbPredicate(MI));
792 // If we find an IT instruction, we need to parse its condition
793 // code and mask operands so that we can apply them correctly
794 // to the subsequent instructions.
795 if (MI.getOpcode() == ARM::t2IT) {
797 unsigned Firstcond = MI.getOperand(0).getImm();
798 unsigned Mask = MI.getOperand(1).getImm();
799 ITBlock.setITState(Firstcond, Mask);
805 // We want to read exactly 4 bytes of data.
806 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
808 return MCDisassembler::Fail;
811 uint32_t insn32 = (bytes[3] << 8) |
816 result = decodeInstruction(DecoderTableThumb32, MI, insn32, Address,
818 if (result != MCDisassembler::Fail) {
820 bool InITBlock = ITBlock.instrInITBlock();
821 Check(result, AddThumbPredicate(MI));
822 AddThumb1SBit(MI, InITBlock);
827 result = decodeInstruction(DecoderTableThumb232, MI, insn32, Address,
829 if (result != MCDisassembler::Fail) {
831 Check(result, AddThumbPredicate(MI));
836 result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
837 if (result != MCDisassembler::Fail) {
839 UpdateThumbVFPPredicate(MI);
844 result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
846 if (result != MCDisassembler::Fail) {
848 Check(result, AddThumbPredicate(MI));
852 if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
854 uint32_t NEONLdStInsn = insn32;
855 NEONLdStInsn &= 0xF0FFFFFF;
856 NEONLdStInsn |= 0x04000000;
857 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
859 if (result != MCDisassembler::Fail) {
861 Check(result, AddThumbPredicate(MI));
866 if (fieldFromInstruction(insn32, 24, 4) == 0xF) {
868 uint32_t NEONDataInsn = insn32;
869 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
870 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
871 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
872 result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
874 if (result != MCDisassembler::Fail) {
876 Check(result, AddThumbPredicate(MI));
882 return MCDisassembler::Fail;
886 extern "C" void LLVMInitializeARMDisassembler() {
887 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
888 createARMDisassembler);
889 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
890 createThumbDisassembler);
893 static const uint16_t GPRDecoderTable[] = {
894 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
895 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
896 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
897 ARM::R12, ARM::SP, ARM::LR, ARM::PC
900 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
901 uint64_t Address, const void *Decoder) {
903 return MCDisassembler::Fail;
905 unsigned Register = GPRDecoderTable[RegNo];
906 Inst.addOperand(MCOperand::CreateReg(Register));
907 return MCDisassembler::Success;
911 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
912 uint64_t Address, const void *Decoder) {
913 DecodeStatus S = MCDisassembler::Success;
916 S = MCDisassembler::SoftFail;
918 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
923 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
924 uint64_t Address, const void *Decoder) {
926 return MCDisassembler::Fail;
927 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
930 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
931 uint64_t Address, const void *Decoder) {
932 unsigned Register = 0;
953 return MCDisassembler::Fail;
956 Inst.addOperand(MCOperand::CreateReg(Register));
957 return MCDisassembler::Success;
960 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
961 uint64_t Address, const void *Decoder) {
962 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
963 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
966 static const uint16_t SPRDecoderTable[] = {
967 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
968 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
969 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
970 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
971 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
972 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
973 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
974 ARM::S28, ARM::S29, ARM::S30, ARM::S31
977 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
978 uint64_t Address, const void *Decoder) {
980 return MCDisassembler::Fail;
982 unsigned Register = SPRDecoderTable[RegNo];
983 Inst.addOperand(MCOperand::CreateReg(Register));
984 return MCDisassembler::Success;
987 static const uint16_t DPRDecoderTable[] = {
988 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
989 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
990 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
991 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
992 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
993 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
994 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
995 ARM::D28, ARM::D29, ARM::D30, ARM::D31
998 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
999 uint64_t Address, const void *Decoder) {
1001 return MCDisassembler::Fail;
1003 unsigned Register = DPRDecoderTable[RegNo];
1004 Inst.addOperand(MCOperand::CreateReg(Register));
1005 return MCDisassembler::Success;
1008 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1009 uint64_t Address, const void *Decoder) {
1011 return MCDisassembler::Fail;
1012 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1016 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
1017 uint64_t Address, const void *Decoder) {
1019 return MCDisassembler::Fail;
1020 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1023 static const uint16_t QPRDecoderTable[] = {
1024 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1025 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1026 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1027 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1031 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1032 uint64_t Address, const void *Decoder) {
1034 return MCDisassembler::Fail;
1037 unsigned Register = QPRDecoderTable[RegNo];
1038 Inst.addOperand(MCOperand::CreateReg(Register));
1039 return MCDisassembler::Success;
1042 static const uint16_t DPairDecoderTable[] = {
1043 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1044 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1045 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1046 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1047 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1051 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1052 uint64_t Address, const void *Decoder) {
1054 return MCDisassembler::Fail;
1056 unsigned Register = DPairDecoderTable[RegNo];
1057 Inst.addOperand(MCOperand::CreateReg(Register));
1058 return MCDisassembler::Success;
1061 static const uint16_t DPairSpacedDecoderTable[] = {
1062 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1063 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1064 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1065 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1066 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1067 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1068 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1069 ARM::D28_D30, ARM::D29_D31
1072 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1075 const void *Decoder) {
1077 return MCDisassembler::Fail;
1079 unsigned Register = DPairSpacedDecoderTable[RegNo];
1080 Inst.addOperand(MCOperand::CreateReg(Register));
1081 return MCDisassembler::Success;
1084 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1085 uint64_t Address, const void *Decoder) {
1086 if (Val == 0xF) return MCDisassembler::Fail;
1087 // AL predicate is not allowed on Thumb1 branches.
1088 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1089 return MCDisassembler::Fail;
1090 Inst.addOperand(MCOperand::CreateImm(Val));
1091 if (Val == ARMCC::AL) {
1092 Inst.addOperand(MCOperand::CreateReg(0));
1094 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1095 return MCDisassembler::Success;
1098 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1099 uint64_t Address, const void *Decoder) {
1101 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1103 Inst.addOperand(MCOperand::CreateReg(0));
1104 return MCDisassembler::Success;
1107 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1108 uint64_t Address, const void *Decoder) {
1109 uint32_t imm = Val & 0xFF;
1110 uint32_t rot = (Val & 0xF00) >> 7;
1111 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1112 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1113 return MCDisassembler::Success;
1116 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1117 uint64_t Address, const void *Decoder) {
1118 DecodeStatus S = MCDisassembler::Success;
1120 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1121 unsigned type = fieldFromInstruction(Val, 5, 2);
1122 unsigned imm = fieldFromInstruction(Val, 7, 5);
1124 // Register-immediate
1125 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1126 return MCDisassembler::Fail;
1128 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1131 Shift = ARM_AM::lsl;
1134 Shift = ARM_AM::lsr;
1137 Shift = ARM_AM::asr;
1140 Shift = ARM_AM::ror;
1144 if (Shift == ARM_AM::ror && imm == 0)
1145 Shift = ARM_AM::rrx;
1147 unsigned Op = Shift | (imm << 3);
1148 Inst.addOperand(MCOperand::CreateImm(Op));
1153 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1154 uint64_t Address, const void *Decoder) {
1155 DecodeStatus S = MCDisassembler::Success;
1157 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1158 unsigned type = fieldFromInstruction(Val, 5, 2);
1159 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1161 // Register-register
1162 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1163 return MCDisassembler::Fail;
1164 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1165 return MCDisassembler::Fail;
1167 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1170 Shift = ARM_AM::lsl;
1173 Shift = ARM_AM::lsr;
1176 Shift = ARM_AM::asr;
1179 Shift = ARM_AM::ror;
1183 Inst.addOperand(MCOperand::CreateImm(Shift));
1188 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1189 uint64_t Address, const void *Decoder) {
1190 DecodeStatus S = MCDisassembler::Success;
1192 bool writebackLoad = false;
1193 unsigned writebackReg = 0;
1194 switch (Inst.getOpcode()) {
1197 case ARM::LDMIA_UPD:
1198 case ARM::LDMDB_UPD:
1199 case ARM::LDMIB_UPD:
1200 case ARM::LDMDA_UPD:
1201 case ARM::t2LDMIA_UPD:
1202 case ARM::t2LDMDB_UPD:
1203 writebackLoad = true;
1204 writebackReg = Inst.getOperand(0).getReg();
1208 // Empty register lists are not allowed.
1209 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1210 for (unsigned i = 0; i < 16; ++i) {
1211 if (Val & (1 << i)) {
1212 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1213 return MCDisassembler::Fail;
1214 // Writeback not allowed if Rn is in the target list.
1215 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1216 Check(S, MCDisassembler::SoftFail);
1223 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1224 uint64_t Address, const void *Decoder) {
1225 DecodeStatus S = MCDisassembler::Success;
1227 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1228 unsigned regs = fieldFromInstruction(Val, 0, 8);
1230 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1231 return MCDisassembler::Fail;
1232 for (unsigned i = 0; i < (regs - 1); ++i) {
1233 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1234 return MCDisassembler::Fail;
1240 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1241 uint64_t Address, const void *Decoder) {
1242 DecodeStatus S = MCDisassembler::Success;
1244 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1245 unsigned regs = fieldFromInstruction(Val, 0, 8);
1249 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1250 return MCDisassembler::Fail;
1251 for (unsigned i = 0; i < (regs - 1); ++i) {
1252 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1253 return MCDisassembler::Fail;
1259 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1260 uint64_t Address, const void *Decoder) {
1261 // This operand encodes a mask of contiguous zeros between a specified MSB
1262 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1263 // the mask of all bits LSB-and-lower, and then xor them to create
1264 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1265 // create the final mask.
1266 unsigned msb = fieldFromInstruction(Val, 5, 5);
1267 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1269 DecodeStatus S = MCDisassembler::Success;
1271 Check(S, MCDisassembler::SoftFail);
1272 // The check above will cause the warning for the "potentially undefined
1273 // instruction encoding" but we can't build a bad MCOperand value here
1274 // with a lsb > msb or else printing the MCInst will cause a crash.
1278 uint32_t msb_mask = 0xFFFFFFFF;
1279 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1280 uint32_t lsb_mask = (1U << lsb) - 1;
1282 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1286 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1287 uint64_t Address, const void *Decoder) {
1288 DecodeStatus S = MCDisassembler::Success;
1290 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1291 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1292 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1293 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1294 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1295 unsigned U = fieldFromInstruction(Insn, 23, 1);
1297 switch (Inst.getOpcode()) {
1298 case ARM::LDC_OFFSET:
1301 case ARM::LDC_OPTION:
1302 case ARM::LDCL_OFFSET:
1304 case ARM::LDCL_POST:
1305 case ARM::LDCL_OPTION:
1306 case ARM::STC_OFFSET:
1309 case ARM::STC_OPTION:
1310 case ARM::STCL_OFFSET:
1312 case ARM::STCL_POST:
1313 case ARM::STCL_OPTION:
1314 case ARM::t2LDC_OFFSET:
1315 case ARM::t2LDC_PRE:
1316 case ARM::t2LDC_POST:
1317 case ARM::t2LDC_OPTION:
1318 case ARM::t2LDCL_OFFSET:
1319 case ARM::t2LDCL_PRE:
1320 case ARM::t2LDCL_POST:
1321 case ARM::t2LDCL_OPTION:
1322 case ARM::t2STC_OFFSET:
1323 case ARM::t2STC_PRE:
1324 case ARM::t2STC_POST:
1325 case ARM::t2STC_OPTION:
1326 case ARM::t2STCL_OFFSET:
1327 case ARM::t2STCL_PRE:
1328 case ARM::t2STCL_POST:
1329 case ARM::t2STCL_OPTION:
1330 if (coproc == 0xA || coproc == 0xB)
1331 return MCDisassembler::Fail;
1337 Inst.addOperand(MCOperand::CreateImm(coproc));
1338 Inst.addOperand(MCOperand::CreateImm(CRd));
1339 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1340 return MCDisassembler::Fail;
1342 switch (Inst.getOpcode()) {
1343 case ARM::t2LDC2_OFFSET:
1344 case ARM::t2LDC2L_OFFSET:
1345 case ARM::t2LDC2_PRE:
1346 case ARM::t2LDC2L_PRE:
1347 case ARM::t2STC2_OFFSET:
1348 case ARM::t2STC2L_OFFSET:
1349 case ARM::t2STC2_PRE:
1350 case ARM::t2STC2L_PRE:
1351 case ARM::LDC2_OFFSET:
1352 case ARM::LDC2L_OFFSET:
1354 case ARM::LDC2L_PRE:
1355 case ARM::STC2_OFFSET:
1356 case ARM::STC2L_OFFSET:
1358 case ARM::STC2L_PRE:
1359 case ARM::t2LDC_OFFSET:
1360 case ARM::t2LDCL_OFFSET:
1361 case ARM::t2LDC_PRE:
1362 case ARM::t2LDCL_PRE:
1363 case ARM::t2STC_OFFSET:
1364 case ARM::t2STCL_OFFSET:
1365 case ARM::t2STC_PRE:
1366 case ARM::t2STCL_PRE:
1367 case ARM::LDC_OFFSET:
1368 case ARM::LDCL_OFFSET:
1371 case ARM::STC_OFFSET:
1372 case ARM::STCL_OFFSET:
1375 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1376 Inst.addOperand(MCOperand::CreateImm(imm));
1378 case ARM::t2LDC2_POST:
1379 case ARM::t2LDC2L_POST:
1380 case ARM::t2STC2_POST:
1381 case ARM::t2STC2L_POST:
1382 case ARM::LDC2_POST:
1383 case ARM::LDC2L_POST:
1384 case ARM::STC2_POST:
1385 case ARM::STC2L_POST:
1386 case ARM::t2LDC_POST:
1387 case ARM::t2LDCL_POST:
1388 case ARM::t2STC_POST:
1389 case ARM::t2STCL_POST:
1391 case ARM::LDCL_POST:
1393 case ARM::STCL_POST:
1397 // The 'option' variant doesn't encode 'U' in the immediate since
1398 // the immediate is unsigned [0,255].
1399 Inst.addOperand(MCOperand::CreateImm(imm));
1403 switch (Inst.getOpcode()) {
1404 case ARM::LDC_OFFSET:
1407 case ARM::LDC_OPTION:
1408 case ARM::LDCL_OFFSET:
1410 case ARM::LDCL_POST:
1411 case ARM::LDCL_OPTION:
1412 case ARM::STC_OFFSET:
1415 case ARM::STC_OPTION:
1416 case ARM::STCL_OFFSET:
1418 case ARM::STCL_POST:
1419 case ARM::STCL_OPTION:
1420 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1421 return MCDisassembler::Fail;
1431 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1432 uint64_t Address, const void *Decoder) {
1433 DecodeStatus S = MCDisassembler::Success;
1435 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1436 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1437 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1438 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1439 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1440 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1441 unsigned P = fieldFromInstruction(Insn, 24, 1);
1442 unsigned W = fieldFromInstruction(Insn, 21, 1);
1444 // On stores, the writeback operand precedes Rt.
1445 switch (Inst.getOpcode()) {
1446 case ARM::STR_POST_IMM:
1447 case ARM::STR_POST_REG:
1448 case ARM::STRB_POST_IMM:
1449 case ARM::STRB_POST_REG:
1450 case ARM::STRT_POST_REG:
1451 case ARM::STRT_POST_IMM:
1452 case ARM::STRBT_POST_REG:
1453 case ARM::STRBT_POST_IMM:
1454 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1455 return MCDisassembler::Fail;
1461 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1462 return MCDisassembler::Fail;
1464 // On loads, the writeback operand comes after Rt.
1465 switch (Inst.getOpcode()) {
1466 case ARM::LDR_POST_IMM:
1467 case ARM::LDR_POST_REG:
1468 case ARM::LDRB_POST_IMM:
1469 case ARM::LDRB_POST_REG:
1470 case ARM::LDRBT_POST_REG:
1471 case ARM::LDRBT_POST_IMM:
1472 case ARM::LDRT_POST_REG:
1473 case ARM::LDRT_POST_IMM:
1474 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1475 return MCDisassembler::Fail;
1481 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1482 return MCDisassembler::Fail;
1484 ARM_AM::AddrOpc Op = ARM_AM::add;
1485 if (!fieldFromInstruction(Insn, 23, 1))
1488 bool writeback = (P == 0) || (W == 1);
1489 unsigned idx_mode = 0;
1491 idx_mode = ARMII::IndexModePre;
1492 else if (!P && writeback)
1493 idx_mode = ARMII::IndexModePost;
1495 if (writeback && (Rn == 15 || Rn == Rt))
1496 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1499 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1500 return MCDisassembler::Fail;
1501 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1502 switch( fieldFromInstruction(Insn, 5, 2)) {
1516 return MCDisassembler::Fail;
1518 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1519 if (Opc == ARM_AM::ror && amt == 0)
1521 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1523 Inst.addOperand(MCOperand::CreateImm(imm));
1525 Inst.addOperand(MCOperand::CreateReg(0));
1526 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1527 Inst.addOperand(MCOperand::CreateImm(tmp));
1530 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1531 return MCDisassembler::Fail;
1536 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1537 uint64_t Address, const void *Decoder) {
1538 DecodeStatus S = MCDisassembler::Success;
1540 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1541 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1542 unsigned type = fieldFromInstruction(Val, 5, 2);
1543 unsigned imm = fieldFromInstruction(Val, 7, 5);
1544 unsigned U = fieldFromInstruction(Val, 12, 1);
1546 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1562 if (ShOp == ARM_AM::ror && imm == 0)
1565 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1566 return MCDisassembler::Fail;
1567 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1568 return MCDisassembler::Fail;
1571 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1573 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1574 Inst.addOperand(MCOperand::CreateImm(shift));
1580 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1581 uint64_t Address, const void *Decoder) {
1582 DecodeStatus S = MCDisassembler::Success;
1584 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1585 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1586 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1587 unsigned type = fieldFromInstruction(Insn, 22, 1);
1588 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1589 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1590 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1591 unsigned W = fieldFromInstruction(Insn, 21, 1);
1592 unsigned P = fieldFromInstruction(Insn, 24, 1);
1593 unsigned Rt2 = Rt + 1;
1595 bool writeback = (W == 1) | (P == 0);
1597 // For {LD,ST}RD, Rt must be even, else undefined.
1598 switch (Inst.getOpcode()) {
1601 case ARM::STRD_POST:
1604 case ARM::LDRD_POST:
1605 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1610 switch (Inst.getOpcode()) {
1613 case ARM::STRD_POST:
1614 if (P == 0 && W == 1)
1615 S = MCDisassembler::SoftFail;
1617 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1618 S = MCDisassembler::SoftFail;
1619 if (type && Rm == 15)
1620 S = MCDisassembler::SoftFail;
1622 S = MCDisassembler::SoftFail;
1623 if (!type && fieldFromInstruction(Insn, 8, 4))
1624 S = MCDisassembler::SoftFail;
1628 case ARM::STRH_POST:
1630 S = MCDisassembler::SoftFail;
1631 if (writeback && (Rn == 15 || Rn == Rt))
1632 S = MCDisassembler::SoftFail;
1633 if (!type && Rm == 15)
1634 S = MCDisassembler::SoftFail;
1638 case ARM::LDRD_POST:
1639 if (type && Rn == 15){
1641 S = MCDisassembler::SoftFail;
1644 if (P == 0 && W == 1)
1645 S = MCDisassembler::SoftFail;
1646 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1647 S = MCDisassembler::SoftFail;
1648 if (!type && writeback && Rn == 15)
1649 S = MCDisassembler::SoftFail;
1650 if (writeback && (Rn == Rt || Rn == Rt2))
1651 S = MCDisassembler::SoftFail;
1655 case ARM::LDRH_POST:
1656 if (type && Rn == 15){
1658 S = MCDisassembler::SoftFail;
1662 S = MCDisassembler::SoftFail;
1663 if (!type && Rm == 15)
1664 S = MCDisassembler::SoftFail;
1665 if (!type && writeback && (Rn == 15 || Rn == Rt))
1666 S = MCDisassembler::SoftFail;
1669 case ARM::LDRSH_PRE:
1670 case ARM::LDRSH_POST:
1672 case ARM::LDRSB_PRE:
1673 case ARM::LDRSB_POST:
1674 if (type && Rn == 15){
1676 S = MCDisassembler::SoftFail;
1679 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1680 S = MCDisassembler::SoftFail;
1681 if (!type && (Rt == 15 || Rm == 15))
1682 S = MCDisassembler::SoftFail;
1683 if (!type && writeback && (Rn == 15 || Rn == Rt))
1684 S = MCDisassembler::SoftFail;
1690 if (writeback) { // Writeback
1692 U |= ARMII::IndexModePre << 9;
1694 U |= ARMII::IndexModePost << 9;
1696 // On stores, the writeback operand precedes Rt.
1697 switch (Inst.getOpcode()) {
1700 case ARM::STRD_POST:
1703 case ARM::STRH_POST:
1704 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1705 return MCDisassembler::Fail;
1712 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1713 return MCDisassembler::Fail;
1714 switch (Inst.getOpcode()) {
1717 case ARM::STRD_POST:
1720 case ARM::LDRD_POST:
1721 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1722 return MCDisassembler::Fail;
1729 // On loads, the writeback operand comes after Rt.
1730 switch (Inst.getOpcode()) {
1733 case ARM::LDRD_POST:
1736 case ARM::LDRH_POST:
1738 case ARM::LDRSH_PRE:
1739 case ARM::LDRSH_POST:
1741 case ARM::LDRSB_PRE:
1742 case ARM::LDRSB_POST:
1745 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1746 return MCDisassembler::Fail;
1753 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1754 return MCDisassembler::Fail;
1757 Inst.addOperand(MCOperand::CreateReg(0));
1758 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1760 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1761 return MCDisassembler::Fail;
1762 Inst.addOperand(MCOperand::CreateImm(U));
1765 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1766 return MCDisassembler::Fail;
1771 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1772 uint64_t Address, const void *Decoder) {
1773 DecodeStatus S = MCDisassembler::Success;
1775 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1776 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1793 Inst.addOperand(MCOperand::CreateImm(mode));
1794 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1795 return MCDisassembler::Fail;
1800 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1802 uint64_t Address, const void *Decoder) {
1803 DecodeStatus S = MCDisassembler::Success;
1805 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1806 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1807 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1810 switch (Inst.getOpcode()) {
1812 Inst.setOpcode(ARM::RFEDA);
1814 case ARM::LDMDA_UPD:
1815 Inst.setOpcode(ARM::RFEDA_UPD);
1818 Inst.setOpcode(ARM::RFEDB);
1820 case ARM::LDMDB_UPD:
1821 Inst.setOpcode(ARM::RFEDB_UPD);
1824 Inst.setOpcode(ARM::RFEIA);
1826 case ARM::LDMIA_UPD:
1827 Inst.setOpcode(ARM::RFEIA_UPD);
1830 Inst.setOpcode(ARM::RFEIB);
1832 case ARM::LDMIB_UPD:
1833 Inst.setOpcode(ARM::RFEIB_UPD);
1836 Inst.setOpcode(ARM::SRSDA);
1838 case ARM::STMDA_UPD:
1839 Inst.setOpcode(ARM::SRSDA_UPD);
1842 Inst.setOpcode(ARM::SRSDB);
1844 case ARM::STMDB_UPD:
1845 Inst.setOpcode(ARM::SRSDB_UPD);
1848 Inst.setOpcode(ARM::SRSIA);
1850 case ARM::STMIA_UPD:
1851 Inst.setOpcode(ARM::SRSIA_UPD);
1854 Inst.setOpcode(ARM::SRSIB);
1856 case ARM::STMIB_UPD:
1857 Inst.setOpcode(ARM::SRSIB_UPD);
1860 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1863 // For stores (which become SRS's, the only operand is the mode.
1864 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1866 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1870 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1873 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1874 return MCDisassembler::Fail;
1875 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1876 return MCDisassembler::Fail; // Tied
1877 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1878 return MCDisassembler::Fail;
1879 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1880 return MCDisassembler::Fail;
1885 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1886 uint64_t Address, const void *Decoder) {
1887 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1888 unsigned M = fieldFromInstruction(Insn, 17, 1);
1889 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1890 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1892 DecodeStatus S = MCDisassembler::Success;
1894 // imod == '01' --> UNPREDICTABLE
1895 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1896 // return failure here. The '01' imod value is unprintable, so there's
1897 // nothing useful we could do even if we returned UNPREDICTABLE.
1899 if (imod == 1) return MCDisassembler::Fail;
1902 Inst.setOpcode(ARM::CPS3p);
1903 Inst.addOperand(MCOperand::CreateImm(imod));
1904 Inst.addOperand(MCOperand::CreateImm(iflags));
1905 Inst.addOperand(MCOperand::CreateImm(mode));
1906 } else if (imod && !M) {
1907 Inst.setOpcode(ARM::CPS2p);
1908 Inst.addOperand(MCOperand::CreateImm(imod));
1909 Inst.addOperand(MCOperand::CreateImm(iflags));
1910 if (mode) S = MCDisassembler::SoftFail;
1911 } else if (!imod && M) {
1912 Inst.setOpcode(ARM::CPS1p);
1913 Inst.addOperand(MCOperand::CreateImm(mode));
1914 if (iflags) S = MCDisassembler::SoftFail;
1916 // imod == '00' && M == '0' --> UNPREDICTABLE
1917 Inst.setOpcode(ARM::CPS1p);
1918 Inst.addOperand(MCOperand::CreateImm(mode));
1919 S = MCDisassembler::SoftFail;
1925 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1926 uint64_t Address, const void *Decoder) {
1927 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1928 unsigned M = fieldFromInstruction(Insn, 8, 1);
1929 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1930 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1932 DecodeStatus S = MCDisassembler::Success;
1934 // imod == '01' --> UNPREDICTABLE
1935 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1936 // return failure here. The '01' imod value is unprintable, so there's
1937 // nothing useful we could do even if we returned UNPREDICTABLE.
1939 if (imod == 1) return MCDisassembler::Fail;
1942 Inst.setOpcode(ARM::t2CPS3p);
1943 Inst.addOperand(MCOperand::CreateImm(imod));
1944 Inst.addOperand(MCOperand::CreateImm(iflags));
1945 Inst.addOperand(MCOperand::CreateImm(mode));
1946 } else if (imod && !M) {
1947 Inst.setOpcode(ARM::t2CPS2p);
1948 Inst.addOperand(MCOperand::CreateImm(imod));
1949 Inst.addOperand(MCOperand::CreateImm(iflags));
1950 if (mode) S = MCDisassembler::SoftFail;
1951 } else if (!imod && M) {
1952 Inst.setOpcode(ARM::t2CPS1p);
1953 Inst.addOperand(MCOperand::CreateImm(mode));
1954 if (iflags) S = MCDisassembler::SoftFail;
1956 // imod == '00' && M == '0' --> this is a HINT instruction
1957 int imm = fieldFromInstruction(Insn, 0, 8);
1958 // HINT are defined only for immediate in [0..4]
1959 if(imm > 4) return MCDisassembler::Fail;
1960 Inst.setOpcode(ARM::t2HINT);
1961 Inst.addOperand(MCOperand::CreateImm(imm));
1967 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1968 uint64_t Address, const void *Decoder) {
1969 DecodeStatus S = MCDisassembler::Success;
1971 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
1974 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
1975 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
1976 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1977 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
1979 if (Inst.getOpcode() == ARM::t2MOVTi16)
1980 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1981 return MCDisassembler::Fail;
1982 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1983 return MCDisassembler::Fail;
1985 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1986 Inst.addOperand(MCOperand::CreateImm(imm));
1991 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1992 uint64_t Address, const void *Decoder) {
1993 DecodeStatus S = MCDisassembler::Success;
1995 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1996 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1999 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2000 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2002 if (Inst.getOpcode() == ARM::MOVTi16)
2003 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2004 return MCDisassembler::Fail;
2006 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2007 return MCDisassembler::Fail;
2009 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2010 Inst.addOperand(MCOperand::CreateImm(imm));
2012 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2013 return MCDisassembler::Fail;
2018 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2019 uint64_t Address, const void *Decoder) {
2020 DecodeStatus S = MCDisassembler::Success;
2022 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2023 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2024 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2025 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2026 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2029 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2031 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2032 return MCDisassembler::Fail;
2033 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2034 return MCDisassembler::Fail;
2035 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2036 return MCDisassembler::Fail;
2037 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2038 return MCDisassembler::Fail;
2040 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2041 return MCDisassembler::Fail;
2046 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2047 uint64_t Address, const void *Decoder) {
2048 DecodeStatus S = MCDisassembler::Success;
2050 unsigned add = fieldFromInstruction(Val, 12, 1);
2051 unsigned imm = fieldFromInstruction(Val, 0, 12);
2052 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2054 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2055 return MCDisassembler::Fail;
2057 if (!add) imm *= -1;
2058 if (imm == 0 && !add) imm = INT32_MIN;
2059 Inst.addOperand(MCOperand::CreateImm(imm));
2061 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2066 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2067 uint64_t Address, const void *Decoder) {
2068 DecodeStatus S = MCDisassembler::Success;
2070 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2071 unsigned U = fieldFromInstruction(Val, 8, 1);
2072 unsigned imm = fieldFromInstruction(Val, 0, 8);
2074 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2075 return MCDisassembler::Fail;
2078 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2080 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2085 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2086 uint64_t Address, const void *Decoder) {
2087 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2091 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2092 uint64_t Address, const void *Decoder) {
2093 DecodeStatus Status = MCDisassembler::Success;
2095 // Note the J1 and J2 values are from the encoded instruction. So here
2096 // change them to I1 and I2 values via as documented:
2097 // I1 = NOT(J1 EOR S);
2098 // I2 = NOT(J2 EOR S);
2099 // and build the imm32 with one trailing zero as documented:
2100 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2101 unsigned S = fieldFromInstruction(Insn, 26, 1);
2102 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2103 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2104 unsigned I1 = !(J1 ^ S);
2105 unsigned I2 = !(J2 ^ S);
2106 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2107 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2108 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2109 int imm32 = SignExtend32<24>(tmp << 1);
2110 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2111 true, 4, Inst, Decoder))
2112 Inst.addOperand(MCOperand::CreateImm(imm32));
2118 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2119 uint64_t Address, const void *Decoder) {
2120 DecodeStatus S = MCDisassembler::Success;
2122 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2123 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2126 Inst.setOpcode(ARM::BLXi);
2127 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2128 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2129 true, 4, Inst, Decoder))
2130 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2134 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2135 true, 4, Inst, Decoder))
2136 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2137 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2138 return MCDisassembler::Fail;
2144 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2145 uint64_t Address, const void *Decoder) {
2146 DecodeStatus S = MCDisassembler::Success;
2148 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2149 unsigned align = fieldFromInstruction(Val, 4, 2);
2151 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2152 return MCDisassembler::Fail;
2154 Inst.addOperand(MCOperand::CreateImm(0));
2156 Inst.addOperand(MCOperand::CreateImm(4 << align));
2161 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2162 uint64_t Address, const void *Decoder) {
2163 DecodeStatus S = MCDisassembler::Success;
2165 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2166 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2167 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2168 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2169 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2170 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2172 // First output register
2173 switch (Inst.getOpcode()) {
2174 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2175 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2176 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2177 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2178 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2179 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2180 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2181 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2182 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2183 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2184 return MCDisassembler::Fail;
2189 case ARM::VLD2b16wb_fixed:
2190 case ARM::VLD2b16wb_register:
2191 case ARM::VLD2b32wb_fixed:
2192 case ARM::VLD2b32wb_register:
2193 case ARM::VLD2b8wb_fixed:
2194 case ARM::VLD2b8wb_register:
2195 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2196 return MCDisassembler::Fail;
2199 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2200 return MCDisassembler::Fail;
2203 // Second output register
2204 switch (Inst.getOpcode()) {
2208 case ARM::VLD3d8_UPD:
2209 case ARM::VLD3d16_UPD:
2210 case ARM::VLD3d32_UPD:
2214 case ARM::VLD4d8_UPD:
2215 case ARM::VLD4d16_UPD:
2216 case ARM::VLD4d32_UPD:
2217 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2218 return MCDisassembler::Fail;
2223 case ARM::VLD3q8_UPD:
2224 case ARM::VLD3q16_UPD:
2225 case ARM::VLD3q32_UPD:
2229 case ARM::VLD4q8_UPD:
2230 case ARM::VLD4q16_UPD:
2231 case ARM::VLD4q32_UPD:
2232 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2233 return MCDisassembler::Fail;
2238 // Third output register
2239 switch(Inst.getOpcode()) {
2243 case ARM::VLD3d8_UPD:
2244 case ARM::VLD3d16_UPD:
2245 case ARM::VLD3d32_UPD:
2249 case ARM::VLD4d8_UPD:
2250 case ARM::VLD4d16_UPD:
2251 case ARM::VLD4d32_UPD:
2252 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2253 return MCDisassembler::Fail;
2258 case ARM::VLD3q8_UPD:
2259 case ARM::VLD3q16_UPD:
2260 case ARM::VLD3q32_UPD:
2264 case ARM::VLD4q8_UPD:
2265 case ARM::VLD4q16_UPD:
2266 case ARM::VLD4q32_UPD:
2267 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2268 return MCDisassembler::Fail;
2274 // Fourth output register
2275 switch (Inst.getOpcode()) {
2279 case ARM::VLD4d8_UPD:
2280 case ARM::VLD4d16_UPD:
2281 case ARM::VLD4d32_UPD:
2282 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2283 return MCDisassembler::Fail;
2288 case ARM::VLD4q8_UPD:
2289 case ARM::VLD4q16_UPD:
2290 case ARM::VLD4q32_UPD:
2291 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2292 return MCDisassembler::Fail;
2298 // Writeback operand
2299 switch (Inst.getOpcode()) {
2300 case ARM::VLD1d8wb_fixed:
2301 case ARM::VLD1d16wb_fixed:
2302 case ARM::VLD1d32wb_fixed:
2303 case ARM::VLD1d64wb_fixed:
2304 case ARM::VLD1d8wb_register:
2305 case ARM::VLD1d16wb_register:
2306 case ARM::VLD1d32wb_register:
2307 case ARM::VLD1d64wb_register:
2308 case ARM::VLD1q8wb_fixed:
2309 case ARM::VLD1q16wb_fixed:
2310 case ARM::VLD1q32wb_fixed:
2311 case ARM::VLD1q64wb_fixed:
2312 case ARM::VLD1q8wb_register:
2313 case ARM::VLD1q16wb_register:
2314 case ARM::VLD1q32wb_register:
2315 case ARM::VLD1q64wb_register:
2316 case ARM::VLD1d8Twb_fixed:
2317 case ARM::VLD1d8Twb_register:
2318 case ARM::VLD1d16Twb_fixed:
2319 case ARM::VLD1d16Twb_register:
2320 case ARM::VLD1d32Twb_fixed:
2321 case ARM::VLD1d32Twb_register:
2322 case ARM::VLD1d64Twb_fixed:
2323 case ARM::VLD1d64Twb_register:
2324 case ARM::VLD1d8Qwb_fixed:
2325 case ARM::VLD1d8Qwb_register:
2326 case ARM::VLD1d16Qwb_fixed:
2327 case ARM::VLD1d16Qwb_register:
2328 case ARM::VLD1d32Qwb_fixed:
2329 case ARM::VLD1d32Qwb_register:
2330 case ARM::VLD1d64Qwb_fixed:
2331 case ARM::VLD1d64Qwb_register:
2332 case ARM::VLD2d8wb_fixed:
2333 case ARM::VLD2d16wb_fixed:
2334 case ARM::VLD2d32wb_fixed:
2335 case ARM::VLD2q8wb_fixed:
2336 case ARM::VLD2q16wb_fixed:
2337 case ARM::VLD2q32wb_fixed:
2338 case ARM::VLD2d8wb_register:
2339 case ARM::VLD2d16wb_register:
2340 case ARM::VLD2d32wb_register:
2341 case ARM::VLD2q8wb_register:
2342 case ARM::VLD2q16wb_register:
2343 case ARM::VLD2q32wb_register:
2344 case ARM::VLD2b8wb_fixed:
2345 case ARM::VLD2b16wb_fixed:
2346 case ARM::VLD2b32wb_fixed:
2347 case ARM::VLD2b8wb_register:
2348 case ARM::VLD2b16wb_register:
2349 case ARM::VLD2b32wb_register:
2350 Inst.addOperand(MCOperand::CreateImm(0));
2352 case ARM::VLD3d8_UPD:
2353 case ARM::VLD3d16_UPD:
2354 case ARM::VLD3d32_UPD:
2355 case ARM::VLD3q8_UPD:
2356 case ARM::VLD3q16_UPD:
2357 case ARM::VLD3q32_UPD:
2358 case ARM::VLD4d8_UPD:
2359 case ARM::VLD4d16_UPD:
2360 case ARM::VLD4d32_UPD:
2361 case ARM::VLD4q8_UPD:
2362 case ARM::VLD4q16_UPD:
2363 case ARM::VLD4q32_UPD:
2364 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2365 return MCDisassembler::Fail;
2371 // AddrMode6 Base (register+alignment)
2372 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2373 return MCDisassembler::Fail;
2375 // AddrMode6 Offset (register)
2376 switch (Inst.getOpcode()) {
2378 // The below have been updated to have explicit am6offset split
2379 // between fixed and register offset. For those instructions not
2380 // yet updated, we need to add an additional reg0 operand for the
2383 // The fixed offset encodes as Rm == 0xd, so we check for that.
2385 Inst.addOperand(MCOperand::CreateReg(0));
2388 // Fall through to handle the register offset variant.
2389 case ARM::VLD1d8wb_fixed:
2390 case ARM::VLD1d16wb_fixed:
2391 case ARM::VLD1d32wb_fixed:
2392 case ARM::VLD1d64wb_fixed:
2393 case ARM::VLD1d8Twb_fixed:
2394 case ARM::VLD1d16Twb_fixed:
2395 case ARM::VLD1d32Twb_fixed:
2396 case ARM::VLD1d64Twb_fixed:
2397 case ARM::VLD1d8Qwb_fixed:
2398 case ARM::VLD1d16Qwb_fixed:
2399 case ARM::VLD1d32Qwb_fixed:
2400 case ARM::VLD1d64Qwb_fixed:
2401 case ARM::VLD1d8wb_register:
2402 case ARM::VLD1d16wb_register:
2403 case ARM::VLD1d32wb_register:
2404 case ARM::VLD1d64wb_register:
2405 case ARM::VLD1q8wb_fixed:
2406 case ARM::VLD1q16wb_fixed:
2407 case ARM::VLD1q32wb_fixed:
2408 case ARM::VLD1q64wb_fixed:
2409 case ARM::VLD1q8wb_register:
2410 case ARM::VLD1q16wb_register:
2411 case ARM::VLD1q32wb_register:
2412 case ARM::VLD1q64wb_register:
2413 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2414 // variant encodes Rm == 0xf. Anything else is a register offset post-
2415 // increment and we need to add the register operand to the instruction.
2416 if (Rm != 0xD && Rm != 0xF &&
2417 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2418 return MCDisassembler::Fail;
2420 case ARM::VLD2d8wb_fixed:
2421 case ARM::VLD2d16wb_fixed:
2422 case ARM::VLD2d32wb_fixed:
2423 case ARM::VLD2b8wb_fixed:
2424 case ARM::VLD2b16wb_fixed:
2425 case ARM::VLD2b32wb_fixed:
2426 case ARM::VLD2q8wb_fixed:
2427 case ARM::VLD2q16wb_fixed:
2428 case ARM::VLD2q32wb_fixed:
2435 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2436 uint64_t Address, const void *Decoder) {
2437 DecodeStatus S = MCDisassembler::Success;
2439 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2440 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2441 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2442 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2443 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2444 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2446 // Writeback Operand
2447 switch (Inst.getOpcode()) {
2448 case ARM::VST1d8wb_fixed:
2449 case ARM::VST1d16wb_fixed:
2450 case ARM::VST1d32wb_fixed:
2451 case ARM::VST1d64wb_fixed:
2452 case ARM::VST1d8wb_register:
2453 case ARM::VST1d16wb_register:
2454 case ARM::VST1d32wb_register:
2455 case ARM::VST1d64wb_register:
2456 case ARM::VST1q8wb_fixed:
2457 case ARM::VST1q16wb_fixed:
2458 case ARM::VST1q32wb_fixed:
2459 case ARM::VST1q64wb_fixed:
2460 case ARM::VST1q8wb_register:
2461 case ARM::VST1q16wb_register:
2462 case ARM::VST1q32wb_register:
2463 case ARM::VST1q64wb_register:
2464 case ARM::VST1d8Twb_fixed:
2465 case ARM::VST1d16Twb_fixed:
2466 case ARM::VST1d32Twb_fixed:
2467 case ARM::VST1d64Twb_fixed:
2468 case ARM::VST1d8Twb_register:
2469 case ARM::VST1d16Twb_register:
2470 case ARM::VST1d32Twb_register:
2471 case ARM::VST1d64Twb_register:
2472 case ARM::VST1d8Qwb_fixed:
2473 case ARM::VST1d16Qwb_fixed:
2474 case ARM::VST1d32Qwb_fixed:
2475 case ARM::VST1d64Qwb_fixed:
2476 case ARM::VST1d8Qwb_register:
2477 case ARM::VST1d16Qwb_register:
2478 case ARM::VST1d32Qwb_register:
2479 case ARM::VST1d64Qwb_register:
2480 case ARM::VST2d8wb_fixed:
2481 case ARM::VST2d16wb_fixed:
2482 case ARM::VST2d32wb_fixed:
2483 case ARM::VST2d8wb_register:
2484 case ARM::VST2d16wb_register:
2485 case ARM::VST2d32wb_register:
2486 case ARM::VST2q8wb_fixed:
2487 case ARM::VST2q16wb_fixed:
2488 case ARM::VST2q32wb_fixed:
2489 case ARM::VST2q8wb_register:
2490 case ARM::VST2q16wb_register:
2491 case ARM::VST2q32wb_register:
2492 case ARM::VST2b8wb_fixed:
2493 case ARM::VST2b16wb_fixed:
2494 case ARM::VST2b32wb_fixed:
2495 case ARM::VST2b8wb_register:
2496 case ARM::VST2b16wb_register:
2497 case ARM::VST2b32wb_register:
2499 return MCDisassembler::Fail;
2500 Inst.addOperand(MCOperand::CreateImm(0));
2502 case ARM::VST3d8_UPD:
2503 case ARM::VST3d16_UPD:
2504 case ARM::VST3d32_UPD:
2505 case ARM::VST3q8_UPD:
2506 case ARM::VST3q16_UPD:
2507 case ARM::VST3q32_UPD:
2508 case ARM::VST4d8_UPD:
2509 case ARM::VST4d16_UPD:
2510 case ARM::VST4d32_UPD:
2511 case ARM::VST4q8_UPD:
2512 case ARM::VST4q16_UPD:
2513 case ARM::VST4q32_UPD:
2514 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2515 return MCDisassembler::Fail;
2521 // AddrMode6 Base (register+alignment)
2522 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2523 return MCDisassembler::Fail;
2525 // AddrMode6 Offset (register)
2526 switch (Inst.getOpcode()) {
2529 Inst.addOperand(MCOperand::CreateReg(0));
2530 else if (Rm != 0xF) {
2531 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2532 return MCDisassembler::Fail;
2535 case ARM::VST1d8wb_fixed:
2536 case ARM::VST1d16wb_fixed:
2537 case ARM::VST1d32wb_fixed:
2538 case ARM::VST1d64wb_fixed:
2539 case ARM::VST1q8wb_fixed:
2540 case ARM::VST1q16wb_fixed:
2541 case ARM::VST1q32wb_fixed:
2542 case ARM::VST1q64wb_fixed:
2543 case ARM::VST1d8Twb_fixed:
2544 case ARM::VST1d16Twb_fixed:
2545 case ARM::VST1d32Twb_fixed:
2546 case ARM::VST1d64Twb_fixed:
2547 case ARM::VST1d8Qwb_fixed:
2548 case ARM::VST1d16Qwb_fixed:
2549 case ARM::VST1d32Qwb_fixed:
2550 case ARM::VST1d64Qwb_fixed:
2551 case ARM::VST2d8wb_fixed:
2552 case ARM::VST2d16wb_fixed:
2553 case ARM::VST2d32wb_fixed:
2554 case ARM::VST2q8wb_fixed:
2555 case ARM::VST2q16wb_fixed:
2556 case ARM::VST2q32wb_fixed:
2557 case ARM::VST2b8wb_fixed:
2558 case ARM::VST2b16wb_fixed:
2559 case ARM::VST2b32wb_fixed:
2564 // First input register
2565 switch (Inst.getOpcode()) {
2570 case ARM::VST1q16wb_fixed:
2571 case ARM::VST1q16wb_register:
2572 case ARM::VST1q32wb_fixed:
2573 case ARM::VST1q32wb_register:
2574 case ARM::VST1q64wb_fixed:
2575 case ARM::VST1q64wb_register:
2576 case ARM::VST1q8wb_fixed:
2577 case ARM::VST1q8wb_register:
2581 case ARM::VST2d16wb_fixed:
2582 case ARM::VST2d16wb_register:
2583 case ARM::VST2d32wb_fixed:
2584 case ARM::VST2d32wb_register:
2585 case ARM::VST2d8wb_fixed:
2586 case ARM::VST2d8wb_register:
2587 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2588 return MCDisassembler::Fail;
2593 case ARM::VST2b16wb_fixed:
2594 case ARM::VST2b16wb_register:
2595 case ARM::VST2b32wb_fixed:
2596 case ARM::VST2b32wb_register:
2597 case ARM::VST2b8wb_fixed:
2598 case ARM::VST2b8wb_register:
2599 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2600 return MCDisassembler::Fail;
2603 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2604 return MCDisassembler::Fail;
2607 // Second input register
2608 switch (Inst.getOpcode()) {
2612 case ARM::VST3d8_UPD:
2613 case ARM::VST3d16_UPD:
2614 case ARM::VST3d32_UPD:
2618 case ARM::VST4d8_UPD:
2619 case ARM::VST4d16_UPD:
2620 case ARM::VST4d32_UPD:
2621 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2622 return MCDisassembler::Fail;
2627 case ARM::VST3q8_UPD:
2628 case ARM::VST3q16_UPD:
2629 case ARM::VST3q32_UPD:
2633 case ARM::VST4q8_UPD:
2634 case ARM::VST4q16_UPD:
2635 case ARM::VST4q32_UPD:
2636 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2637 return MCDisassembler::Fail;
2643 // Third input register
2644 switch (Inst.getOpcode()) {
2648 case ARM::VST3d8_UPD:
2649 case ARM::VST3d16_UPD:
2650 case ARM::VST3d32_UPD:
2654 case ARM::VST4d8_UPD:
2655 case ARM::VST4d16_UPD:
2656 case ARM::VST4d32_UPD:
2657 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2658 return MCDisassembler::Fail;
2663 case ARM::VST3q8_UPD:
2664 case ARM::VST3q16_UPD:
2665 case ARM::VST3q32_UPD:
2669 case ARM::VST4q8_UPD:
2670 case ARM::VST4q16_UPD:
2671 case ARM::VST4q32_UPD:
2672 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2673 return MCDisassembler::Fail;
2679 // Fourth input register
2680 switch (Inst.getOpcode()) {
2684 case ARM::VST4d8_UPD:
2685 case ARM::VST4d16_UPD:
2686 case ARM::VST4d32_UPD:
2687 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2688 return MCDisassembler::Fail;
2693 case ARM::VST4q8_UPD:
2694 case ARM::VST4q16_UPD:
2695 case ARM::VST4q32_UPD:
2696 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2697 return MCDisassembler::Fail;
2706 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2707 uint64_t Address, const void *Decoder) {
2708 DecodeStatus S = MCDisassembler::Success;
2710 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2711 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2712 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2713 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2714 unsigned align = fieldFromInstruction(Insn, 4, 1);
2715 unsigned size = fieldFromInstruction(Insn, 6, 2);
2717 if (size == 0 && align == 1)
2718 return MCDisassembler::Fail;
2719 align *= (1 << size);
2721 switch (Inst.getOpcode()) {
2722 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2723 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2724 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2725 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2726 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2727 return MCDisassembler::Fail;
2730 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2731 return MCDisassembler::Fail;
2735 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2736 return MCDisassembler::Fail;
2739 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2740 return MCDisassembler::Fail;
2741 Inst.addOperand(MCOperand::CreateImm(align));
2743 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2744 // variant encodes Rm == 0xf. Anything else is a register offset post-
2745 // increment and we need to add the register operand to the instruction.
2746 if (Rm != 0xD && Rm != 0xF &&
2747 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2748 return MCDisassembler::Fail;
2753 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2754 uint64_t Address, const void *Decoder) {
2755 DecodeStatus S = MCDisassembler::Success;
2757 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2758 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2759 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2760 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2761 unsigned align = fieldFromInstruction(Insn, 4, 1);
2762 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2765 switch (Inst.getOpcode()) {
2766 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2767 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2768 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2769 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2770 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2771 return MCDisassembler::Fail;
2773 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2774 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2775 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2776 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2777 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2778 return MCDisassembler::Fail;
2781 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2782 return MCDisassembler::Fail;
2787 Inst.addOperand(MCOperand::CreateImm(0));
2789 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2790 return MCDisassembler::Fail;
2791 Inst.addOperand(MCOperand::CreateImm(align));
2793 if (Rm != 0xD && Rm != 0xF) {
2794 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2795 return MCDisassembler::Fail;
2801 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2802 uint64_t Address, const void *Decoder) {
2803 DecodeStatus S = MCDisassembler::Success;
2805 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2806 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2807 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2808 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2809 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2811 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2812 return MCDisassembler::Fail;
2813 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2814 return MCDisassembler::Fail;
2815 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2816 return MCDisassembler::Fail;
2818 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2819 return MCDisassembler::Fail;
2822 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2823 return MCDisassembler::Fail;
2824 Inst.addOperand(MCOperand::CreateImm(0));
2827 Inst.addOperand(MCOperand::CreateReg(0));
2828 else if (Rm != 0xF) {
2829 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2830 return MCDisassembler::Fail;
2836 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2837 uint64_t Address, const void *Decoder) {
2838 DecodeStatus S = MCDisassembler::Success;
2840 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2841 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2842 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2843 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2844 unsigned size = fieldFromInstruction(Insn, 6, 2);
2845 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2846 unsigned align = fieldFromInstruction(Insn, 4, 1);
2850 return MCDisassembler::Fail;
2863 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2864 return MCDisassembler::Fail;
2865 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2866 return MCDisassembler::Fail;
2867 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2868 return MCDisassembler::Fail;
2869 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2870 return MCDisassembler::Fail;
2872 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2873 return MCDisassembler::Fail;
2876 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2877 return MCDisassembler::Fail;
2878 Inst.addOperand(MCOperand::CreateImm(align));
2881 Inst.addOperand(MCOperand::CreateReg(0));
2882 else if (Rm != 0xF) {
2883 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2884 return MCDisassembler::Fail;
2891 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2892 uint64_t Address, const void *Decoder) {
2893 DecodeStatus S = MCDisassembler::Success;
2895 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2896 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2897 unsigned imm = fieldFromInstruction(Insn, 0, 4);
2898 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2899 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2900 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2901 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2902 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2905 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2906 return MCDisassembler::Fail;
2908 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2909 return MCDisassembler::Fail;
2912 Inst.addOperand(MCOperand::CreateImm(imm));
2914 switch (Inst.getOpcode()) {
2915 case ARM::VORRiv4i16:
2916 case ARM::VORRiv2i32:
2917 case ARM::VBICiv4i16:
2918 case ARM::VBICiv2i32:
2919 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2920 return MCDisassembler::Fail;
2922 case ARM::VORRiv8i16:
2923 case ARM::VORRiv4i32:
2924 case ARM::VBICiv8i16:
2925 case ARM::VBICiv4i32:
2926 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2927 return MCDisassembler::Fail;
2936 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2937 uint64_t Address, const void *Decoder) {
2938 DecodeStatus S = MCDisassembler::Success;
2940 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2941 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2942 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2943 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2944 unsigned size = fieldFromInstruction(Insn, 18, 2);
2946 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2947 return MCDisassembler::Fail;
2948 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2949 return MCDisassembler::Fail;
2950 Inst.addOperand(MCOperand::CreateImm(8 << size));
2955 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2956 uint64_t Address, const void *Decoder) {
2957 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2958 return MCDisassembler::Success;
2961 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2962 uint64_t Address, const void *Decoder) {
2963 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2964 return MCDisassembler::Success;
2967 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2968 uint64_t Address, const void *Decoder) {
2969 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2970 return MCDisassembler::Success;
2973 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2974 uint64_t Address, const void *Decoder) {
2975 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2976 return MCDisassembler::Success;
2979 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2980 uint64_t Address, const void *Decoder) {
2981 DecodeStatus S = MCDisassembler::Success;
2983 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2984 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2985 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2986 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
2987 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2988 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2989 unsigned op = fieldFromInstruction(Insn, 6, 1);
2991 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2992 return MCDisassembler::Fail;
2994 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2995 return MCDisassembler::Fail; // Writeback
2998 switch (Inst.getOpcode()) {
3001 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3002 return MCDisassembler::Fail;
3005 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3006 return MCDisassembler::Fail;
3009 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3010 return MCDisassembler::Fail;
3015 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3016 uint64_t Address, const void *Decoder) {
3017 DecodeStatus S = MCDisassembler::Success;
3019 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3020 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3022 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3023 return MCDisassembler::Fail;
3025 switch(Inst.getOpcode()) {
3027 return MCDisassembler::Fail;
3029 break; // tADR does not explicitly represent the PC as an operand.
3031 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3035 Inst.addOperand(MCOperand::CreateImm(imm));
3039 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3040 uint64_t Address, const void *Decoder) {
3041 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3042 true, 2, Inst, Decoder))
3043 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3044 return MCDisassembler::Success;
3047 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3048 uint64_t Address, const void *Decoder) {
3049 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3050 true, 4, Inst, Decoder))
3051 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3052 return MCDisassembler::Success;
3055 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3056 uint64_t Address, const void *Decoder) {
3057 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3058 true, 2, Inst, Decoder))
3059 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3060 return MCDisassembler::Success;
3063 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3064 uint64_t Address, const void *Decoder) {
3065 DecodeStatus S = MCDisassembler::Success;
3067 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3068 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3070 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3071 return MCDisassembler::Fail;
3072 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3073 return MCDisassembler::Fail;
3078 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3079 uint64_t Address, const void *Decoder) {
3080 DecodeStatus S = MCDisassembler::Success;
3082 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3083 unsigned imm = fieldFromInstruction(Val, 3, 5);
3085 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3086 return MCDisassembler::Fail;
3087 Inst.addOperand(MCOperand::CreateImm(imm));
3092 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3093 uint64_t Address, const void *Decoder) {
3094 unsigned imm = Val << 2;
3096 Inst.addOperand(MCOperand::CreateImm(imm));
3097 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3099 return MCDisassembler::Success;
3102 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3103 uint64_t Address, const void *Decoder) {
3104 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3105 Inst.addOperand(MCOperand::CreateImm(Val));
3107 return MCDisassembler::Success;
3110 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3111 uint64_t Address, const void *Decoder) {
3112 DecodeStatus S = MCDisassembler::Success;
3114 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3115 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3116 unsigned imm = fieldFromInstruction(Val, 0, 2);
3118 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3119 return MCDisassembler::Fail;
3120 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3121 return MCDisassembler::Fail;
3122 Inst.addOperand(MCOperand::CreateImm(imm));
3127 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3128 uint64_t Address, const void *Decoder) {
3129 DecodeStatus S = MCDisassembler::Success;
3131 switch (Inst.getOpcode()) {
3137 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3138 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3139 return MCDisassembler::Fail;
3143 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3145 switch (Inst.getOpcode()) {
3147 Inst.setOpcode(ARM::t2LDRBpci);
3150 Inst.setOpcode(ARM::t2LDRHpci);
3153 Inst.setOpcode(ARM::t2LDRSHpci);
3156 Inst.setOpcode(ARM::t2LDRSBpci);
3159 Inst.setOpcode(ARM::t2PLDi12);
3160 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3163 return MCDisassembler::Fail;
3166 int imm = fieldFromInstruction(Insn, 0, 12);
3167 if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
3168 Inst.addOperand(MCOperand::CreateImm(imm));
3173 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3174 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3175 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3176 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3177 return MCDisassembler::Fail;
3182 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3183 uint64_t Address, const void *Decoder) {
3185 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3187 int imm = Val & 0xFF;
3189 if (!(Val & 0x100)) imm *= -1;
3190 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3193 return MCDisassembler::Success;
3196 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3197 uint64_t Address, const void *Decoder) {
3198 DecodeStatus S = MCDisassembler::Success;
3200 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3201 unsigned imm = fieldFromInstruction(Val, 0, 9);
3203 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3204 return MCDisassembler::Fail;
3205 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3206 return MCDisassembler::Fail;
3211 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3212 uint64_t Address, const void *Decoder) {
3213 DecodeStatus S = MCDisassembler::Success;
3215 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3216 unsigned imm = fieldFromInstruction(Val, 0, 8);
3218 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3219 return MCDisassembler::Fail;
3221 Inst.addOperand(MCOperand::CreateImm(imm));
3226 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3227 uint64_t Address, const void *Decoder) {
3228 int imm = Val & 0xFF;
3231 else if (!(Val & 0x100))
3233 Inst.addOperand(MCOperand::CreateImm(imm));
3235 return MCDisassembler::Success;
3239 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3240 uint64_t Address, const void *Decoder) {
3241 DecodeStatus S = MCDisassembler::Success;
3243 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3244 unsigned imm = fieldFromInstruction(Val, 0, 9);
3246 // Some instructions always use an additive offset.
3247 switch (Inst.getOpcode()) {
3262 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3263 return MCDisassembler::Fail;
3264 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3265 return MCDisassembler::Fail;
3270 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3271 uint64_t Address, const void *Decoder) {
3272 DecodeStatus S = MCDisassembler::Success;
3274 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3275 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3276 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3277 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3279 unsigned load = fieldFromInstruction(Insn, 20, 1);
3282 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3283 return MCDisassembler::Fail;
3286 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3287 return MCDisassembler::Fail;
3290 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3291 return MCDisassembler::Fail;
3294 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3295 return MCDisassembler::Fail;
3300 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3301 uint64_t Address, const void *Decoder) {
3302 DecodeStatus S = MCDisassembler::Success;
3304 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3305 unsigned imm = fieldFromInstruction(Val, 0, 12);
3307 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3308 return MCDisassembler::Fail;
3309 Inst.addOperand(MCOperand::CreateImm(imm));
3315 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3316 uint64_t Address, const void *Decoder) {
3317 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3319 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3320 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3321 Inst.addOperand(MCOperand::CreateImm(imm));
3323 return MCDisassembler::Success;
3326 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3327 uint64_t Address, const void *Decoder) {
3328 DecodeStatus S = MCDisassembler::Success;
3330 if (Inst.getOpcode() == ARM::tADDrSP) {
3331 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3332 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3334 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3335 return MCDisassembler::Fail;
3336 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3337 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3338 return MCDisassembler::Fail;
3339 } else if (Inst.getOpcode() == ARM::tADDspr) {
3340 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3342 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3343 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3344 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3345 return MCDisassembler::Fail;
3351 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3352 uint64_t Address, const void *Decoder) {
3353 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3354 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3356 Inst.addOperand(MCOperand::CreateImm(imod));
3357 Inst.addOperand(MCOperand::CreateImm(flags));
3359 return MCDisassembler::Success;
3362 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3363 uint64_t Address, const void *Decoder) {
3364 DecodeStatus S = MCDisassembler::Success;
3365 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3366 unsigned add = fieldFromInstruction(Insn, 4, 1);
3368 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3369 return MCDisassembler::Fail;
3370 Inst.addOperand(MCOperand::CreateImm(add));
3375 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3376 uint64_t Address, const void *Decoder) {
3377 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3378 // Note only one trailing zero not two. Also the J1 and J2 values are from
3379 // the encoded instruction. So here change to I1 and I2 values via:
3380 // I1 = NOT(J1 EOR S);
3381 // I2 = NOT(J2 EOR S);
3382 // and build the imm32 with two trailing zeros as documented:
3383 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3384 unsigned S = (Val >> 23) & 1;
3385 unsigned J1 = (Val >> 22) & 1;
3386 unsigned J2 = (Val >> 21) & 1;
3387 unsigned I1 = !(J1 ^ S);
3388 unsigned I2 = !(J2 ^ S);
3389 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3390 int imm32 = SignExtend32<25>(tmp << 1);
3392 if (!tryAddingSymbolicOperand(Address,
3393 (Address & ~2u) + imm32 + 4,
3394 true, 4, Inst, Decoder))
3395 Inst.addOperand(MCOperand::CreateImm(imm32));
3396 return MCDisassembler::Success;
3399 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3400 uint64_t Address, const void *Decoder) {
3401 if (Val == 0xA || Val == 0xB)
3402 return MCDisassembler::Fail;
3404 Inst.addOperand(MCOperand::CreateImm(Val));
3405 return MCDisassembler::Success;
3409 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3410 uint64_t Address, const void *Decoder) {
3411 DecodeStatus S = MCDisassembler::Success;
3413 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3414 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3416 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3417 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3418 return MCDisassembler::Fail;
3419 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3420 return MCDisassembler::Fail;
3425 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3426 uint64_t Address, const void *Decoder) {
3427 DecodeStatus S = MCDisassembler::Success;
3429 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3430 if (pred == 0xE || pred == 0xF) {
3431 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3434 return MCDisassembler::Fail;
3436 Inst.setOpcode(ARM::t2DSB);
3439 Inst.setOpcode(ARM::t2DMB);
3442 Inst.setOpcode(ARM::t2ISB);
3446 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3447 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3450 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3451 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3452 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3453 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3454 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3456 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3457 return MCDisassembler::Fail;
3458 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3459 return MCDisassembler::Fail;
3464 // Decode a shifted immediate operand. These basically consist
3465 // of an 8-bit value, and a 4-bit directive that specifies either
3466 // a splat operation or a rotation.
3467 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3468 uint64_t Address, const void *Decoder) {
3469 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3471 unsigned byte = fieldFromInstruction(Val, 8, 2);
3472 unsigned imm = fieldFromInstruction(Val, 0, 8);
3475 Inst.addOperand(MCOperand::CreateImm(imm));
3478 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3481 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3484 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3489 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3490 unsigned rot = fieldFromInstruction(Val, 7, 5);
3491 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3492 Inst.addOperand(MCOperand::CreateImm(imm));
3495 return MCDisassembler::Success;
3499 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3500 uint64_t Address, const void *Decoder){
3501 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3502 true, 2, Inst, Decoder))
3503 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3504 return MCDisassembler::Success;
3507 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3508 uint64_t Address, const void *Decoder){
3509 // Val is passed in as S:J1:J2:imm10:imm11
3510 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3511 // the encoded instruction. So here change to I1 and I2 values via:
3512 // I1 = NOT(J1 EOR S);
3513 // I2 = NOT(J2 EOR S);
3514 // and build the imm32 with one trailing zero as documented:
3515 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3516 unsigned S = (Val >> 23) & 1;
3517 unsigned J1 = (Val >> 22) & 1;
3518 unsigned J2 = (Val >> 21) & 1;
3519 unsigned I1 = !(J1 ^ S);
3520 unsigned I2 = !(J2 ^ S);
3521 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3522 int imm32 = SignExtend32<25>(tmp << 1);
3524 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3525 true, 4, Inst, Decoder))
3526 Inst.addOperand(MCOperand::CreateImm(imm32));
3527 return MCDisassembler::Success;
3530 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3531 uint64_t Address, const void *Decoder) {
3533 return MCDisassembler::Fail;
3535 Inst.addOperand(MCOperand::CreateImm(Val));
3536 return MCDisassembler::Success;
3539 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3540 uint64_t Address, const void *Decoder) {
3541 if (!Val) return MCDisassembler::Fail;
3542 Inst.addOperand(MCOperand::CreateImm(Val));
3543 return MCDisassembler::Success;
3546 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3547 uint64_t Address, const void *Decoder) {
3548 DecodeStatus S = MCDisassembler::Success;
3550 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3551 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3552 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3554 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3556 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3557 return MCDisassembler::Fail;
3558 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3559 return MCDisassembler::Fail;
3560 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3561 return MCDisassembler::Fail;
3562 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3563 return MCDisassembler::Fail;
3569 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3570 uint64_t Address, const void *Decoder){
3571 DecodeStatus S = MCDisassembler::Success;
3573 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3574 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3575 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3576 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3578 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
3579 return MCDisassembler::Fail;
3581 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3582 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3584 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3585 return MCDisassembler::Fail;
3586 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3587 return MCDisassembler::Fail;
3588 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3589 return MCDisassembler::Fail;
3590 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3591 return MCDisassembler::Fail;
3596 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3597 uint64_t Address, const void *Decoder) {
3598 DecodeStatus S = MCDisassembler::Success;
3600 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3601 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3602 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3603 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3604 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3605 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3607 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3609 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3610 return MCDisassembler::Fail;
3611 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3612 return MCDisassembler::Fail;
3613 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3614 return MCDisassembler::Fail;
3615 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3616 return MCDisassembler::Fail;
3621 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3622 uint64_t Address, const void *Decoder) {
3623 DecodeStatus S = MCDisassembler::Success;
3625 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3626 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3627 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3628 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3629 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3630 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3631 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3633 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3634 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3636 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3637 return MCDisassembler::Fail;
3638 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3639 return MCDisassembler::Fail;
3640 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3641 return MCDisassembler::Fail;
3642 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3643 return MCDisassembler::Fail;
3649 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3650 uint64_t Address, const void *Decoder) {
3651 DecodeStatus S = MCDisassembler::Success;
3653 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3654 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3655 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3656 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3657 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3658 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3660 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3662 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3663 return MCDisassembler::Fail;
3664 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3665 return MCDisassembler::Fail;
3666 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3667 return MCDisassembler::Fail;
3668 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3669 return MCDisassembler::Fail;
3674 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3675 uint64_t Address, const void *Decoder) {
3676 DecodeStatus S = MCDisassembler::Success;
3678 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3679 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3680 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3681 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3682 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3683 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3685 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3687 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3688 return MCDisassembler::Fail;
3689 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3690 return MCDisassembler::Fail;
3691 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3692 return MCDisassembler::Fail;
3693 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3694 return MCDisassembler::Fail;
3699 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3700 uint64_t Address, const void *Decoder) {
3701 DecodeStatus S = MCDisassembler::Success;
3703 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3704 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3705 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3706 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3707 unsigned size = fieldFromInstruction(Insn, 10, 2);
3713 return MCDisassembler::Fail;
3715 if (fieldFromInstruction(Insn, 4, 1))
3716 return MCDisassembler::Fail; // UNDEFINED
3717 index = fieldFromInstruction(Insn, 5, 3);
3720 if (fieldFromInstruction(Insn, 5, 1))
3721 return MCDisassembler::Fail; // UNDEFINED
3722 index = fieldFromInstruction(Insn, 6, 2);
3723 if (fieldFromInstruction(Insn, 4, 1))
3727 if (fieldFromInstruction(Insn, 6, 1))
3728 return MCDisassembler::Fail; // UNDEFINED
3729 index = fieldFromInstruction(Insn, 7, 1);
3731 switch (fieldFromInstruction(Insn, 4, 2)) {
3737 return MCDisassembler::Fail;
3742 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3743 return MCDisassembler::Fail;
3744 if (Rm != 0xF) { // Writeback
3745 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3746 return MCDisassembler::Fail;
3748 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3749 return MCDisassembler::Fail;
3750 Inst.addOperand(MCOperand::CreateImm(align));
3753 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3754 return MCDisassembler::Fail;
3756 Inst.addOperand(MCOperand::CreateReg(0));
3759 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3760 return MCDisassembler::Fail;
3761 Inst.addOperand(MCOperand::CreateImm(index));
3766 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3767 uint64_t Address, const void *Decoder) {
3768 DecodeStatus S = MCDisassembler::Success;
3770 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3771 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3772 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3773 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3774 unsigned size = fieldFromInstruction(Insn, 10, 2);
3780 return MCDisassembler::Fail;
3782 if (fieldFromInstruction(Insn, 4, 1))
3783 return MCDisassembler::Fail; // UNDEFINED
3784 index = fieldFromInstruction(Insn, 5, 3);
3787 if (fieldFromInstruction(Insn, 5, 1))
3788 return MCDisassembler::Fail; // UNDEFINED
3789 index = fieldFromInstruction(Insn, 6, 2);
3790 if (fieldFromInstruction(Insn, 4, 1))
3794 if (fieldFromInstruction(Insn, 6, 1))
3795 return MCDisassembler::Fail; // UNDEFINED
3796 index = fieldFromInstruction(Insn, 7, 1);
3798 switch (fieldFromInstruction(Insn, 4, 2)) {
3804 return MCDisassembler::Fail;
3809 if (Rm != 0xF) { // Writeback
3810 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3811 return MCDisassembler::Fail;
3813 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3814 return MCDisassembler::Fail;
3815 Inst.addOperand(MCOperand::CreateImm(align));
3818 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3819 return MCDisassembler::Fail;
3821 Inst.addOperand(MCOperand::CreateReg(0));
3824 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3825 return MCDisassembler::Fail;
3826 Inst.addOperand(MCOperand::CreateImm(index));
3832 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3833 uint64_t Address, const void *Decoder) {
3834 DecodeStatus S = MCDisassembler::Success;
3836 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3837 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3838 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3839 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3840 unsigned size = fieldFromInstruction(Insn, 10, 2);
3847 return MCDisassembler::Fail;
3849 index = fieldFromInstruction(Insn, 5, 3);
3850 if (fieldFromInstruction(Insn, 4, 1))
3854 index = fieldFromInstruction(Insn, 6, 2);
3855 if (fieldFromInstruction(Insn, 4, 1))
3857 if (fieldFromInstruction(Insn, 5, 1))
3861 if (fieldFromInstruction(Insn, 5, 1))
3862 return MCDisassembler::Fail; // UNDEFINED
3863 index = fieldFromInstruction(Insn, 7, 1);
3864 if (fieldFromInstruction(Insn, 4, 1) != 0)
3866 if (fieldFromInstruction(Insn, 6, 1))
3871 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3872 return MCDisassembler::Fail;
3873 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3874 return MCDisassembler::Fail;
3875 if (Rm != 0xF) { // Writeback
3876 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3877 return MCDisassembler::Fail;
3879 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3880 return MCDisassembler::Fail;
3881 Inst.addOperand(MCOperand::CreateImm(align));
3884 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3885 return MCDisassembler::Fail;
3887 Inst.addOperand(MCOperand::CreateReg(0));
3890 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3891 return MCDisassembler::Fail;
3892 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3893 return MCDisassembler::Fail;
3894 Inst.addOperand(MCOperand::CreateImm(index));
3899 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3900 uint64_t Address, const void *Decoder) {
3901 DecodeStatus S = MCDisassembler::Success;
3903 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3904 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3905 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3906 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3907 unsigned size = fieldFromInstruction(Insn, 10, 2);
3914 return MCDisassembler::Fail;
3916 index = fieldFromInstruction(Insn, 5, 3);
3917 if (fieldFromInstruction(Insn, 4, 1))
3921 index = fieldFromInstruction(Insn, 6, 2);
3922 if (fieldFromInstruction(Insn, 4, 1))
3924 if (fieldFromInstruction(Insn, 5, 1))
3928 if (fieldFromInstruction(Insn, 5, 1))
3929 return MCDisassembler::Fail; // UNDEFINED
3930 index = fieldFromInstruction(Insn, 7, 1);
3931 if (fieldFromInstruction(Insn, 4, 1) != 0)
3933 if (fieldFromInstruction(Insn, 6, 1))
3938 if (Rm != 0xF) { // Writeback
3939 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3940 return MCDisassembler::Fail;
3942 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3943 return MCDisassembler::Fail;
3944 Inst.addOperand(MCOperand::CreateImm(align));
3947 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3948 return MCDisassembler::Fail;
3950 Inst.addOperand(MCOperand::CreateReg(0));
3953 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3954 return MCDisassembler::Fail;
3955 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3956 return MCDisassembler::Fail;
3957 Inst.addOperand(MCOperand::CreateImm(index));
3963 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3964 uint64_t Address, const void *Decoder) {
3965 DecodeStatus S = MCDisassembler::Success;
3967 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3968 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3969 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3970 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3971 unsigned size = fieldFromInstruction(Insn, 10, 2);
3978 return MCDisassembler::Fail;
3980 if (fieldFromInstruction(Insn, 4, 1))
3981 return MCDisassembler::Fail; // UNDEFINED
3982 index = fieldFromInstruction(Insn, 5, 3);
3985 if (fieldFromInstruction(Insn, 4, 1))
3986 return MCDisassembler::Fail; // UNDEFINED
3987 index = fieldFromInstruction(Insn, 6, 2);
3988 if (fieldFromInstruction(Insn, 5, 1))
3992 if (fieldFromInstruction(Insn, 4, 2))
3993 return MCDisassembler::Fail; // UNDEFINED
3994 index = fieldFromInstruction(Insn, 7, 1);
3995 if (fieldFromInstruction(Insn, 6, 1))
4000 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4001 return MCDisassembler::Fail;
4002 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4003 return MCDisassembler::Fail;
4004 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4005 return MCDisassembler::Fail;
4007 if (Rm != 0xF) { // Writeback
4008 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4009 return MCDisassembler::Fail;
4011 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4012 return MCDisassembler::Fail;
4013 Inst.addOperand(MCOperand::CreateImm(align));
4016 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4017 return MCDisassembler::Fail;
4019 Inst.addOperand(MCOperand::CreateReg(0));
4022 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4023 return MCDisassembler::Fail;
4024 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4025 return MCDisassembler::Fail;
4026 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4027 return MCDisassembler::Fail;
4028 Inst.addOperand(MCOperand::CreateImm(index));
4033 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4034 uint64_t Address, const void *Decoder) {
4035 DecodeStatus S = MCDisassembler::Success;
4037 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4038 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4039 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4040 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4041 unsigned size = fieldFromInstruction(Insn, 10, 2);
4048 return MCDisassembler::Fail;
4050 if (fieldFromInstruction(Insn, 4, 1))
4051 return MCDisassembler::Fail; // UNDEFINED
4052 index = fieldFromInstruction(Insn, 5, 3);
4055 if (fieldFromInstruction(Insn, 4, 1))
4056 return MCDisassembler::Fail; // UNDEFINED
4057 index = fieldFromInstruction(Insn, 6, 2);
4058 if (fieldFromInstruction(Insn, 5, 1))
4062 if (fieldFromInstruction(Insn, 4, 2))
4063 return MCDisassembler::Fail; // UNDEFINED
4064 index = fieldFromInstruction(Insn, 7, 1);
4065 if (fieldFromInstruction(Insn, 6, 1))
4070 if (Rm != 0xF) { // Writeback
4071 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4072 return MCDisassembler::Fail;
4074 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4075 return MCDisassembler::Fail;
4076 Inst.addOperand(MCOperand::CreateImm(align));
4079 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4080 return MCDisassembler::Fail;
4082 Inst.addOperand(MCOperand::CreateReg(0));
4085 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4086 return MCDisassembler::Fail;
4087 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4088 return MCDisassembler::Fail;
4089 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4090 return MCDisassembler::Fail;
4091 Inst.addOperand(MCOperand::CreateImm(index));
4097 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4098 uint64_t Address, const void *Decoder) {
4099 DecodeStatus S = MCDisassembler::Success;
4101 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4102 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4103 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4104 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4105 unsigned size = fieldFromInstruction(Insn, 10, 2);
4112 return MCDisassembler::Fail;
4114 if (fieldFromInstruction(Insn, 4, 1))
4116 index = fieldFromInstruction(Insn, 5, 3);
4119 if (fieldFromInstruction(Insn, 4, 1))
4121 index = fieldFromInstruction(Insn, 6, 2);
4122 if (fieldFromInstruction(Insn, 5, 1))
4126 switch (fieldFromInstruction(Insn, 4, 2)) {
4130 return MCDisassembler::Fail;
4132 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4135 index = fieldFromInstruction(Insn, 7, 1);
4136 if (fieldFromInstruction(Insn, 6, 1))
4141 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4142 return MCDisassembler::Fail;
4143 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4144 return MCDisassembler::Fail;
4145 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4146 return MCDisassembler::Fail;
4147 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4148 return MCDisassembler::Fail;
4150 if (Rm != 0xF) { // Writeback
4151 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4152 return MCDisassembler::Fail;
4154 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4155 return MCDisassembler::Fail;
4156 Inst.addOperand(MCOperand::CreateImm(align));
4159 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4160 return MCDisassembler::Fail;
4162 Inst.addOperand(MCOperand::CreateReg(0));
4165 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4166 return MCDisassembler::Fail;
4167 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4168 return MCDisassembler::Fail;
4169 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4170 return MCDisassembler::Fail;
4171 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4172 return MCDisassembler::Fail;
4173 Inst.addOperand(MCOperand::CreateImm(index));
4178 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4179 uint64_t Address, const void *Decoder) {
4180 DecodeStatus S = MCDisassembler::Success;
4182 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4183 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4184 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4185 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4186 unsigned size = fieldFromInstruction(Insn, 10, 2);
4193 return MCDisassembler::Fail;
4195 if (fieldFromInstruction(Insn, 4, 1))
4197 index = fieldFromInstruction(Insn, 5, 3);
4200 if (fieldFromInstruction(Insn, 4, 1))
4202 index = fieldFromInstruction(Insn, 6, 2);
4203 if (fieldFromInstruction(Insn, 5, 1))
4207 switch (fieldFromInstruction(Insn, 4, 2)) {
4211 return MCDisassembler::Fail;
4213 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4216 index = fieldFromInstruction(Insn, 7, 1);
4217 if (fieldFromInstruction(Insn, 6, 1))
4222 if (Rm != 0xF) { // Writeback
4223 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4224 return MCDisassembler::Fail;
4226 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4227 return MCDisassembler::Fail;
4228 Inst.addOperand(MCOperand::CreateImm(align));
4231 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4232 return MCDisassembler::Fail;
4234 Inst.addOperand(MCOperand::CreateReg(0));
4237 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4238 return MCDisassembler::Fail;
4239 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4240 return MCDisassembler::Fail;
4241 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4242 return MCDisassembler::Fail;
4243 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4244 return MCDisassembler::Fail;
4245 Inst.addOperand(MCOperand::CreateImm(index));
4250 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4251 uint64_t Address, const void *Decoder) {
4252 DecodeStatus S = MCDisassembler::Success;
4253 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4254 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4255 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4256 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4257 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4259 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4260 S = MCDisassembler::SoftFail;
4262 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4263 return MCDisassembler::Fail;
4264 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4265 return MCDisassembler::Fail;
4266 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4267 return MCDisassembler::Fail;
4268 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4269 return MCDisassembler::Fail;
4270 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4271 return MCDisassembler::Fail;
4276 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4277 uint64_t Address, const void *Decoder) {
4278 DecodeStatus S = MCDisassembler::Success;
4279 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4280 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4281 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4282 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4283 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4285 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4286 S = MCDisassembler::SoftFail;
4288 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4289 return MCDisassembler::Fail;
4290 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4291 return MCDisassembler::Fail;
4292 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4293 return MCDisassembler::Fail;
4294 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4295 return MCDisassembler::Fail;
4296 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4297 return MCDisassembler::Fail;
4302 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4303 uint64_t Address, const void *Decoder) {
4304 DecodeStatus S = MCDisassembler::Success;
4305 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4306 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4310 S = MCDisassembler::SoftFail;
4315 S = MCDisassembler::SoftFail;
4318 Inst.addOperand(MCOperand::CreateImm(pred));
4319 Inst.addOperand(MCOperand::CreateImm(mask));
4324 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4325 uint64_t Address, const void *Decoder) {
4326 DecodeStatus S = MCDisassembler::Success;
4328 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4329 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4330 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4331 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4332 unsigned W = fieldFromInstruction(Insn, 21, 1);
4333 unsigned U = fieldFromInstruction(Insn, 23, 1);
4334 unsigned P = fieldFromInstruction(Insn, 24, 1);
4335 bool writeback = (W == 1) | (P == 0);
4337 addr |= (U << 8) | (Rn << 9);
4339 if (writeback && (Rn == Rt || Rn == Rt2))
4340 Check(S, MCDisassembler::SoftFail);
4342 Check(S, MCDisassembler::SoftFail);
4345 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4346 return MCDisassembler::Fail;
4348 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4349 return MCDisassembler::Fail;
4350 // Writeback operand
4351 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4352 return MCDisassembler::Fail;
4354 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4355 return MCDisassembler::Fail;
4361 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4362 uint64_t Address, const void *Decoder) {
4363 DecodeStatus S = MCDisassembler::Success;
4365 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4366 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4367 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4368 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4369 unsigned W = fieldFromInstruction(Insn, 21, 1);
4370 unsigned U = fieldFromInstruction(Insn, 23, 1);
4371 unsigned P = fieldFromInstruction(Insn, 24, 1);
4372 bool writeback = (W == 1) | (P == 0);
4374 addr |= (U << 8) | (Rn << 9);
4376 if (writeback && (Rn == Rt || Rn == Rt2))
4377 Check(S, MCDisassembler::SoftFail);
4379 // Writeback operand
4380 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4381 return MCDisassembler::Fail;
4383 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4384 return MCDisassembler::Fail;
4386 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4387 return MCDisassembler::Fail;
4389 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4390 return MCDisassembler::Fail;
4395 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4396 uint64_t Address, const void *Decoder) {
4397 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4398 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4399 if (sign1 != sign2) return MCDisassembler::Fail;
4401 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4402 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4403 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4405 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4407 return MCDisassembler::Success;
4410 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4412 const void *Decoder) {
4413 DecodeStatus S = MCDisassembler::Success;
4415 // Shift of "asr #32" is not allowed in Thumb2 mode.
4416 if (Val == 0x20) S = MCDisassembler::SoftFail;
4417 Inst.addOperand(MCOperand::CreateImm(Val));
4421 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4422 uint64_t Address, const void *Decoder) {
4423 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4424 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4425 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4426 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4429 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4431 DecodeStatus S = MCDisassembler::Success;
4433 if (Rt == Rn || Rn == Rt2)
4434 S = MCDisassembler::SoftFail;
4436 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4437 return MCDisassembler::Fail;
4438 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4439 return MCDisassembler::Fail;
4440 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4441 return MCDisassembler::Fail;
4442 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4443 return MCDisassembler::Fail;
4448 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4449 uint64_t Address, const void *Decoder) {
4450 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4451 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4452 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4453 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4454 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4455 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4457 DecodeStatus S = MCDisassembler::Success;
4459 // VMOVv2f32 is ambiguous with these decodings.
4460 if (!(imm & 0x38) && cmode == 0xF) {
4461 Inst.setOpcode(ARM::VMOVv2f32);
4462 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4465 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4467 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4468 return MCDisassembler::Fail;
4469 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4470 return MCDisassembler::Fail;
4471 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4476 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4477 uint64_t Address, const void *Decoder) {
4478 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4479 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4480 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4481 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4482 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4483 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4485 DecodeStatus S = MCDisassembler::Success;
4487 // VMOVv4f32 is ambiguous with these decodings.
4488 if (!(imm & 0x38) && cmode == 0xF) {
4489 Inst.setOpcode(ARM::VMOVv4f32);
4490 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4493 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4495 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4496 return MCDisassembler::Fail;
4497 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4498 return MCDisassembler::Fail;
4499 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4504 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
4505 const void *Decoder)
4507 unsigned Imm = fieldFromInstruction(Insn, 0, 3);
4508 if (Imm > 4) return MCDisassembler::Fail;
4509 Inst.addOperand(MCOperand::CreateImm(Imm));
4510 return MCDisassembler::Success;
4513 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4514 uint64_t Address, const void *Decoder) {
4515 DecodeStatus S = MCDisassembler::Success;
4517 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4518 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4519 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4520 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4521 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4523 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4524 S = MCDisassembler::SoftFail;
4526 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4527 return MCDisassembler::Fail;
4528 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4529 return MCDisassembler::Fail;
4530 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4531 return MCDisassembler::Fail;
4532 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4533 return MCDisassembler::Fail;
4534 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4535 return MCDisassembler::Fail;
4540 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4541 uint64_t Address, const void *Decoder) {
4543 DecodeStatus S = MCDisassembler::Success;
4545 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4546 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4547 unsigned cop = fieldFromInstruction(Val, 8, 4);
4548 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4549 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4551 if ((cop & ~0x1) == 0xa)
4552 return MCDisassembler::Fail;
4555 S = MCDisassembler::SoftFail;
4557 Inst.addOperand(MCOperand::CreateImm(cop));
4558 Inst.addOperand(MCOperand::CreateImm(opc1));
4559 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4560 return MCDisassembler::Fail;
4561 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4562 return MCDisassembler::Fail;
4563 Inst.addOperand(MCOperand::CreateImm(CRm));