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 "MCTargetDesc/ARMAddressingModes.h"
13 #include "MCTargetDesc/ARMMCExpr.h"
14 #include "MCTargetDesc/ARMBaseInfo.h"
15 #include "llvm/MC/EDInstInfo.h"
16 #include "llvm/MC/MCInst.h"
17 #include "llvm/MC/MCInstrDesc.h"
18 #include "llvm/MC/MCExpr.h"
19 #include "llvm/MC/MCContext.h"
20 #include "llvm/MC/MCDisassembler.h"
21 #include "llvm/MC/MCFixedLenDisassembler.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Support/MemoryObject.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/LEB128.h"
27 #include "llvm/Support/TargetRegistry.h"
28 #include "llvm/Support/raw_ostream.h"
33 typedef MCDisassembler::DecodeStatus DecodeStatus;
36 // Handles the condition code status of instructions in IT blocks
40 // Returns the condition code for instruction in IT block
42 unsigned CC = ARMCC::AL;
48 // Advances the IT block state to the next T or E
49 void advanceITState() {
53 // Returns true if the current instruction is in an IT block
54 bool instrInITBlock() {
55 return !ITStates.empty();
58 // Returns true if current instruction is the last instruction in an IT block
59 bool instrLastInITBlock() {
60 return ITStates.size() == 1;
63 // Called when decoding an IT instruction. Sets the IT state for the following
64 // instructions that for the IT block. Firstcond and Mask correspond to the
65 // fields in the IT instruction encoding.
66 void setITState(char Firstcond, char Mask) {
67 // (3 - the number of trailing zeros) is the number of then / else.
68 unsigned CondBit0 = Firstcond & 1;
69 unsigned NumTZ = CountTrailingZeros_32(Mask);
70 unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf);
71 assert(NumTZ <= 3 && "Invalid IT mask!");
72 // push condition codes onto the stack the correct order for the pops
73 for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) {
74 bool T = ((Mask >> Pos) & 1) == CondBit0;
76 ITStates.push_back(CCBits);
78 ITStates.push_back(CCBits ^ 1);
80 ITStates.push_back(CCBits);
84 std::vector<unsigned char> ITStates;
89 /// ARMDisassembler - ARM disassembler for all ARM platforms.
90 class ARMDisassembler : public MCDisassembler {
92 /// Constructor - Initializes the disassembler.
94 ARMDisassembler(const MCSubtargetInfo &STI) :
101 /// getInstruction - See MCDisassembler.
102 DecodeStatus getInstruction(MCInst &instr,
104 const MemoryObject ®ion,
106 raw_ostream &vStream,
107 raw_ostream &cStream) const;
109 /// getEDInfo - See MCDisassembler.
110 const EDInstInfo *getEDInfo() const;
114 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
115 class ThumbDisassembler : public MCDisassembler {
117 /// Constructor - Initializes the disassembler.
119 ThumbDisassembler(const MCSubtargetInfo &STI) :
120 MCDisassembler(STI) {
123 ~ThumbDisassembler() {
126 /// getInstruction - See MCDisassembler.
127 DecodeStatus getInstruction(MCInst &instr,
129 const MemoryObject ®ion,
131 raw_ostream &vStream,
132 raw_ostream &cStream) const;
134 /// getEDInfo - See MCDisassembler.
135 const EDInstInfo *getEDInfo() const;
137 mutable ITStatus ITBlock;
138 DecodeStatus AddThumbPredicate(MCInst&) const;
139 void UpdateThumbVFPPredicate(MCInst&) const;
143 static bool Check(DecodeStatus &Out, DecodeStatus In) {
145 case MCDisassembler::Success:
146 // Out stays the same.
148 case MCDisassembler::SoftFail:
151 case MCDisassembler::Fail:
155 llvm_unreachable("Invalid DecodeStatus!");
159 // Forward declare these because the autogenerated code will reference them.
160 // Definitions are further down.
161 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
162 uint64_t Address, const void *Decoder);
163 static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
164 unsigned RegNo, uint64_t Address,
165 const void *Decoder);
166 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
167 uint64_t Address, const void *Decoder);
168 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
169 uint64_t Address, const void *Decoder);
170 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
171 uint64_t Address, const void *Decoder);
172 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
173 uint64_t Address, const void *Decoder);
174 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
175 uint64_t Address, const void *Decoder);
176 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
177 uint64_t Address, const void *Decoder);
178 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
181 const void *Decoder);
182 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
183 uint64_t Address, const void *Decoder);
184 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
185 uint64_t Address, const void *Decoder);
186 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
187 unsigned RegNo, uint64_t Address,
188 const void *Decoder);
190 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
201 uint64_t Address, const void *Decoder);
203 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
204 uint64_t Address, const void *Decoder);
205 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
206 uint64_t Address, const void *Decoder);
207 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
210 const void *Decoder);
211 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
212 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
214 uint64_t Address, const void *Decoder);
215 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
216 uint64_t Address, const void *Decoder);
217 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
218 uint64_t Address, const void *Decoder);
220 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
223 const void *Decoder);
224 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
225 uint64_t Address, const void *Decoder);
226 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
227 uint64_t Address, const void *Decoder);
228 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
229 uint64_t Address, const void *Decoder);
230 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
231 uint64_t Address, const void *Decoder);
232 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
233 uint64_t Address, const void *Decoder);
234 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
235 uint64_t Address, const void *Decoder);
236 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
237 uint64_t Address, const void *Decoder);
238 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
239 uint64_t Address, const void *Decoder);
240 static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
241 uint64_t Address, const void *Decoder);
242 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
243 uint64_t Address, const void *Decoder);
244 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
245 uint64_t Address, const void *Decoder);
246 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
247 uint64_t Address, const void *Decoder);
248 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
249 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
251 uint64_t Address, const void *Decoder);
252 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
253 uint64_t Address, const void *Decoder);
254 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
255 uint64_t Address, const void *Decoder);
256 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
257 uint64_t Address, const void *Decoder);
258 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
259 uint64_t Address, const void *Decoder);
260 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
261 uint64_t Address, const void *Decoder);
262 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
263 uint64_t Address, const void *Decoder);
264 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
265 uint64_t Address, const void *Decoder);
266 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
267 uint64_t Address, const void *Decoder);
268 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
269 uint64_t Address, const void *Decoder);
270 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
271 uint64_t Address, const void *Decoder);
272 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
307 uint64_t Address, const void *Decoder);
308 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
309 uint64_t Address, const void *Decoder);
310 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
311 uint64_t Address, const void *Decoder);
312 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
313 uint64_t Address, const void *Decoder);
314 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
315 uint64_t Address, const void *Decoder);
316 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
317 uint64_t Address, const void *Decoder);
320 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
321 uint64_t Address, const void *Decoder);
322 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
323 uint64_t Address, const void *Decoder);
324 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
325 uint64_t Address, const void *Decoder);
326 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
327 uint64_t Address, const void *Decoder);
328 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
329 uint64_t Address, const void *Decoder);
330 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
331 uint64_t Address, const void *Decoder);
332 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
333 uint64_t Address, const void *Decoder);
334 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
335 uint64_t Address, const void *Decoder);
336 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
337 uint64_t Address, const void *Decoder);
338 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
339 uint64_t Address, const void *Decoder);
340 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
341 uint64_t Address, const void *Decoder);
342 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
343 uint64_t Address, const void *Decoder);
344 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
345 uint64_t Address, const void *Decoder);
346 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
347 uint64_t Address, const void *Decoder);
348 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
349 uint64_t Address, const void *Decoder);
350 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
351 uint64_t Address, const void *Decoder);
352 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
353 uint64_t Address, const void *Decoder);
354 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
355 uint64_t Address, const void *Decoder);
356 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
357 uint64_t Address, const void *Decoder);
358 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
359 uint64_t Address, const void *Decoder);
360 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
361 uint64_t Address, const void *Decoder);
362 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
363 uint64_t Address, const void *Decoder);
364 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
365 uint64_t Address, const void *Decoder);
366 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
367 uint64_t Address, const void *Decoder);
368 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
369 uint64_t Address, const void *Decoder);
370 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
371 uint64_t Address, const void *Decoder);
372 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
373 uint64_t Address, const void *Decoder);
374 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
375 uint64_t Address, const void *Decoder);
376 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
377 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
379 uint64_t Address, const void *Decoder);
380 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
381 uint64_t Address, const void *Decoder);
383 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
384 uint64_t Address, const void *Decoder);
385 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
386 uint64_t Address, const void *Decoder);
387 #include "ARMGenDisassemblerTables.inc"
388 #include "ARMGenEDInfo.inc"
390 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
391 return new ARMDisassembler(STI);
394 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
395 return new ThumbDisassembler(STI);
398 const EDInstInfo *ARMDisassembler::getEDInfo() const {
402 const EDInstInfo *ThumbDisassembler::getEDInfo() const {
406 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
407 const MemoryObject &Region,
410 raw_ostream &cs) const {
415 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
416 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
418 // We want to read exactly 4 bytes of data.
419 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
421 return MCDisassembler::Fail;
424 // Encoded as a small-endian 32-bit word in the stream.
425 uint32_t insn = (bytes[3] << 24) |
430 // Calling the auto-generated decoder function.
431 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
433 if (result != MCDisassembler::Fail) {
438 // VFP and NEON instructions, similarly, are shared between ARM
441 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
442 if (result != MCDisassembler::Fail) {
448 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
450 if (result != MCDisassembler::Fail) {
452 // Add a fake predicate operand, because we share these instruction
453 // definitions with Thumb2 where these instructions are predicable.
454 if (!DecodePredicateOperand(MI, 0xE, Address, this))
455 return MCDisassembler::Fail;
460 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
462 if (result != MCDisassembler::Fail) {
464 // Add a fake predicate operand, because we share these instruction
465 // definitions with Thumb2 where these instructions are predicable.
466 if (!DecodePredicateOperand(MI, 0xE, Address, this))
467 return MCDisassembler::Fail;
472 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
474 if (result != MCDisassembler::Fail) {
476 // Add a fake predicate operand, because we share these instruction
477 // definitions with Thumb2 where these instructions are predicable.
478 if (!DecodePredicateOperand(MI, 0xE, Address, this))
479 return MCDisassembler::Fail;
486 return MCDisassembler::Fail;
490 extern const MCInstrDesc ARMInsts[];
493 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
494 /// immediate Value in the MCInst. The immediate Value has had any PC
495 /// adjustment made by the caller. If the instruction is a branch instruction
496 /// then isBranch is true, else false. If the getOpInfo() function was set as
497 /// part of the setupForSymbolicDisassembly() call then that function is called
498 /// to get any symbolic information at the Address for this instruction. If
499 /// that returns non-zero then the symbolic information it returns is used to
500 /// create an MCExpr and that is added as an operand to the MCInst. If
501 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
502 /// Value is done and if a symbol is found an MCExpr is created with that, else
503 /// an MCExpr with Value is created. This function returns true if it adds an
504 /// operand to the MCInst and false otherwise.
505 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
506 bool isBranch, uint64_t InstSize,
507 MCInst &MI, const void *Decoder) {
508 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
509 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
510 struct LLVMOpInfo1 SymbolicOp;
511 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
512 SymbolicOp.Value = Value;
513 void *DisInfo = Dis->getDisInfoBlock();
516 !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
517 // Clear SymbolicOp.Value from above and also all other fields.
518 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
519 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
522 uint64_t ReferenceType;
524 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
526 ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
527 const char *ReferenceName;
528 uint64_t SymbolValue = 0x00000000ffffffffULL & Value;
529 const char *Name = SymbolLookUp(DisInfo, SymbolValue, &ReferenceType,
530 Address, &ReferenceName);
532 SymbolicOp.AddSymbol.Name = Name;
533 SymbolicOp.AddSymbol.Present = true;
535 // For branches always create an MCExpr so it gets printed as hex address.
537 SymbolicOp.Value = Value;
539 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
540 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
541 if (!Name && !isBranch)
545 MCContext *Ctx = Dis->getMCContext();
546 const MCExpr *Add = NULL;
547 if (SymbolicOp.AddSymbol.Present) {
548 if (SymbolicOp.AddSymbol.Name) {
549 StringRef Name(SymbolicOp.AddSymbol.Name);
550 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
551 Add = MCSymbolRefExpr::Create(Sym, *Ctx);
553 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
557 const MCExpr *Sub = NULL;
558 if (SymbolicOp.SubtractSymbol.Present) {
559 if (SymbolicOp.SubtractSymbol.Name) {
560 StringRef Name(SymbolicOp.SubtractSymbol.Name);
561 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
562 Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
564 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
568 const MCExpr *Off = NULL;
569 if (SymbolicOp.Value != 0)
570 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
576 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
578 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
580 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
585 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
592 Expr = MCConstantExpr::Create(0, *Ctx);
595 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
596 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
597 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
598 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
599 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
600 MI.addOperand(MCOperand::CreateExpr(Expr));
602 llvm_unreachable("bad SymbolicOp.VariantKind");
607 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
608 /// referenced by a load instruction with the base register that is the Pc.
609 /// These can often be values in a literal pool near the Address of the
610 /// instruction. The Address of the instruction and its immediate Value are
611 /// used as a possible literal pool entry. The SymbolLookUp call back will
612 /// return the name of a symbol referenced by the literal pool's entry if
613 /// the referenced address is that of a symbol. Or it will return a pointer to
614 /// a literal 'C' string if the referenced address of the literal pool's entry
615 /// is an address into a section with 'C' string literals.
616 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
617 const void *Decoder) {
618 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
619 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
621 void *DisInfo = Dis->getDisInfoBlock();
622 uint64_t ReferenceType;
623 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
624 const char *ReferenceName;
625 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
626 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
627 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
628 (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
632 // Thumb1 instructions don't have explicit S bits. Rather, they
633 // implicitly set CPSR. Since it's not represented in the encoding, the
634 // auto-generated decoder won't inject the CPSR operand. We need to fix
635 // that as a post-pass.
636 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
637 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
638 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
639 MCInst::iterator I = MI.begin();
640 for (unsigned i = 0; i < NumOps; ++i, ++I) {
641 if (I == MI.end()) break;
642 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
643 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
644 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
649 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
652 // Most Thumb instructions don't have explicit predicates in the
653 // encoding, but rather get their predicates from IT context. We need
654 // to fix up the predicate operands using this context information as a
656 MCDisassembler::DecodeStatus
657 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
658 MCDisassembler::DecodeStatus S = Success;
660 // A few instructions actually have predicates encoded in them. Don't
661 // try to overwrite it if we're seeing one of those.
662 switch (MI.getOpcode()) {
673 // Some instructions (mostly conditional branches) are not
674 // allowed in IT blocks.
675 if (ITBlock.instrInITBlock())
684 // Some instructions (mostly unconditional branches) can
685 // only appears at the end of, or outside of, an IT.
686 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
693 // If we're in an IT block, base the predicate on that. Otherwise,
694 // assume a predicate of AL.
696 CC = ITBlock.getITCC();
699 if (ITBlock.instrInITBlock())
700 ITBlock.advanceITState();
702 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
703 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
704 MCInst::iterator I = MI.begin();
705 for (unsigned i = 0; i < NumOps; ++i, ++I) {
706 if (I == MI.end()) break;
707 if (OpInfo[i].isPredicate()) {
708 I = MI.insert(I, MCOperand::CreateImm(CC));
711 MI.insert(I, MCOperand::CreateReg(0));
713 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
718 I = MI.insert(I, MCOperand::CreateImm(CC));
721 MI.insert(I, MCOperand::CreateReg(0));
723 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
728 // Thumb VFP instructions are a special case. Because we share their
729 // encodings between ARM and Thumb modes, and they are predicable in ARM
730 // mode, the auto-generated decoder will give them an (incorrect)
731 // predicate operand. We need to rewrite these operands based on the IT
732 // context as a post-pass.
733 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
735 CC = ITBlock.getITCC();
736 if (ITBlock.instrInITBlock())
737 ITBlock.advanceITState();
739 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
740 MCInst::iterator I = MI.begin();
741 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
742 for (unsigned i = 0; i < NumOps; ++i, ++I) {
743 if (OpInfo[i].isPredicate() ) {
749 I->setReg(ARM::CPSR);
755 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
756 const MemoryObject &Region,
759 raw_ostream &cs) const {
764 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
765 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
767 // We want to read exactly 2 bytes of data.
768 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
770 return MCDisassembler::Fail;
773 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
774 DecodeStatus result = decodeInstruction(DecoderTableThumb16, MI, insn16,
776 if (result != MCDisassembler::Fail) {
778 Check(result, AddThumbPredicate(MI));
783 result = decodeInstruction(DecoderTableThumbSBit16, MI, insn16,
787 bool InITBlock = ITBlock.instrInITBlock();
788 Check(result, AddThumbPredicate(MI));
789 AddThumb1SBit(MI, InITBlock);
794 result = decodeInstruction(DecoderTableThumb216, MI, insn16,
796 if (result != MCDisassembler::Fail) {
799 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
800 // the Thumb predicate.
801 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
802 result = MCDisassembler::SoftFail;
804 Check(result, AddThumbPredicate(MI));
806 // If we find an IT instruction, we need to parse its condition
807 // code and mask operands so that we can apply them correctly
808 // to the subsequent instructions.
809 if (MI.getOpcode() == ARM::t2IT) {
811 unsigned Firstcond = MI.getOperand(0).getImm();
812 unsigned Mask = MI.getOperand(1).getImm();
813 ITBlock.setITState(Firstcond, Mask);
819 // We want to read exactly 4 bytes of data.
820 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
822 return MCDisassembler::Fail;
825 uint32_t insn32 = (bytes[3] << 8) |
830 result = decodeInstruction(DecoderTableThumb32, MI, insn32, Address,
832 if (result != MCDisassembler::Fail) {
834 bool InITBlock = ITBlock.instrInITBlock();
835 Check(result, AddThumbPredicate(MI));
836 AddThumb1SBit(MI, InITBlock);
841 result = decodeInstruction(DecoderTableThumb232, MI, insn32, Address,
843 if (result != MCDisassembler::Fail) {
845 Check(result, AddThumbPredicate(MI));
850 result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
851 if (result != MCDisassembler::Fail) {
853 UpdateThumbVFPPredicate(MI);
858 result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
860 if (result != MCDisassembler::Fail) {
862 Check(result, AddThumbPredicate(MI));
866 if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
868 uint32_t NEONLdStInsn = insn32;
869 NEONLdStInsn &= 0xF0FFFFFF;
870 NEONLdStInsn |= 0x04000000;
871 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
873 if (result != MCDisassembler::Fail) {
875 Check(result, AddThumbPredicate(MI));
880 if (fieldFromInstruction(insn32, 24, 4) == 0xF) {
882 uint32_t NEONDataInsn = insn32;
883 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
884 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
885 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
886 result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
888 if (result != MCDisassembler::Fail) {
890 Check(result, AddThumbPredicate(MI));
896 return MCDisassembler::Fail;
900 extern "C" void LLVMInitializeARMDisassembler() {
901 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
902 createARMDisassembler);
903 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
904 createThumbDisassembler);
907 static const uint16_t GPRDecoderTable[] = {
908 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
909 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
910 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
911 ARM::R12, ARM::SP, ARM::LR, ARM::PC
914 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
915 uint64_t Address, const void *Decoder) {
917 return MCDisassembler::Fail;
919 unsigned Register = GPRDecoderTable[RegNo];
920 Inst.addOperand(MCOperand::CreateReg(Register));
921 return MCDisassembler::Success;
925 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
926 uint64_t Address, const void *Decoder) {
927 DecodeStatus S = MCDisassembler::Success;
930 S = MCDisassembler::SoftFail;
932 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
937 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
938 uint64_t Address, const void *Decoder) {
940 return MCDisassembler::Fail;
941 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
944 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
945 uint64_t Address, const void *Decoder) {
946 unsigned Register = 0;
967 return MCDisassembler::Fail;
970 Inst.addOperand(MCOperand::CreateReg(Register));
971 return MCDisassembler::Success;
974 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
975 uint64_t Address, const void *Decoder) {
976 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
977 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
980 static const uint16_t SPRDecoderTable[] = {
981 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
982 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
983 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
984 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
985 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
986 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
987 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
988 ARM::S28, ARM::S29, ARM::S30, ARM::S31
991 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
992 uint64_t Address, const void *Decoder) {
994 return MCDisassembler::Fail;
996 unsigned Register = SPRDecoderTable[RegNo];
997 Inst.addOperand(MCOperand::CreateReg(Register));
998 return MCDisassembler::Success;
1001 static const uint16_t DPRDecoderTable[] = {
1002 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
1003 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
1004 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
1005 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
1006 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
1007 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
1008 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
1009 ARM::D28, ARM::D29, ARM::D30, ARM::D31
1012 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
1013 uint64_t Address, const void *Decoder) {
1015 return MCDisassembler::Fail;
1017 unsigned Register = DPRDecoderTable[RegNo];
1018 Inst.addOperand(MCOperand::CreateReg(Register));
1019 return MCDisassembler::Success;
1022 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1023 uint64_t Address, const void *Decoder) {
1025 return MCDisassembler::Fail;
1026 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1030 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
1031 uint64_t Address, const void *Decoder) {
1033 return MCDisassembler::Fail;
1034 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1037 static const uint16_t QPRDecoderTable[] = {
1038 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1039 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1040 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1041 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1045 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1046 uint64_t Address, const void *Decoder) {
1048 return MCDisassembler::Fail;
1051 unsigned Register = QPRDecoderTable[RegNo];
1052 Inst.addOperand(MCOperand::CreateReg(Register));
1053 return MCDisassembler::Success;
1056 static const uint16_t DPairDecoderTable[] = {
1057 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1058 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1059 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1060 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1061 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1065 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1066 uint64_t Address, const void *Decoder) {
1068 return MCDisassembler::Fail;
1070 unsigned Register = DPairDecoderTable[RegNo];
1071 Inst.addOperand(MCOperand::CreateReg(Register));
1072 return MCDisassembler::Success;
1075 static const uint16_t DPairSpacedDecoderTable[] = {
1076 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1077 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1078 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1079 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1080 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1081 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1082 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1083 ARM::D28_D30, ARM::D29_D31
1086 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1089 const void *Decoder) {
1091 return MCDisassembler::Fail;
1093 unsigned Register = DPairSpacedDecoderTable[RegNo];
1094 Inst.addOperand(MCOperand::CreateReg(Register));
1095 return MCDisassembler::Success;
1098 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1099 uint64_t Address, const void *Decoder) {
1100 if (Val == 0xF) return MCDisassembler::Fail;
1101 // AL predicate is not allowed on Thumb1 branches.
1102 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1103 return MCDisassembler::Fail;
1104 Inst.addOperand(MCOperand::CreateImm(Val));
1105 if (Val == ARMCC::AL) {
1106 Inst.addOperand(MCOperand::CreateReg(0));
1108 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1109 return MCDisassembler::Success;
1112 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1113 uint64_t Address, const void *Decoder) {
1115 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1117 Inst.addOperand(MCOperand::CreateReg(0));
1118 return MCDisassembler::Success;
1121 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1122 uint64_t Address, const void *Decoder) {
1123 uint32_t imm = Val & 0xFF;
1124 uint32_t rot = (Val & 0xF00) >> 7;
1125 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1126 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1127 return MCDisassembler::Success;
1130 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1131 uint64_t Address, const void *Decoder) {
1132 DecodeStatus S = MCDisassembler::Success;
1134 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1135 unsigned type = fieldFromInstruction(Val, 5, 2);
1136 unsigned imm = fieldFromInstruction(Val, 7, 5);
1138 // Register-immediate
1139 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1140 return MCDisassembler::Fail;
1142 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1145 Shift = ARM_AM::lsl;
1148 Shift = ARM_AM::lsr;
1151 Shift = ARM_AM::asr;
1154 Shift = ARM_AM::ror;
1158 if (Shift == ARM_AM::ror && imm == 0)
1159 Shift = ARM_AM::rrx;
1161 unsigned Op = Shift | (imm << 3);
1162 Inst.addOperand(MCOperand::CreateImm(Op));
1167 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1168 uint64_t Address, const void *Decoder) {
1169 DecodeStatus S = MCDisassembler::Success;
1171 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1172 unsigned type = fieldFromInstruction(Val, 5, 2);
1173 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1175 // Register-register
1176 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1177 return MCDisassembler::Fail;
1178 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1179 return MCDisassembler::Fail;
1181 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1184 Shift = ARM_AM::lsl;
1187 Shift = ARM_AM::lsr;
1190 Shift = ARM_AM::asr;
1193 Shift = ARM_AM::ror;
1197 Inst.addOperand(MCOperand::CreateImm(Shift));
1202 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1203 uint64_t Address, const void *Decoder) {
1204 DecodeStatus S = MCDisassembler::Success;
1206 bool writebackLoad = false;
1207 unsigned writebackReg = 0;
1208 switch (Inst.getOpcode()) {
1211 case ARM::LDMIA_UPD:
1212 case ARM::LDMDB_UPD:
1213 case ARM::LDMIB_UPD:
1214 case ARM::LDMDA_UPD:
1215 case ARM::t2LDMIA_UPD:
1216 case ARM::t2LDMDB_UPD:
1217 writebackLoad = true;
1218 writebackReg = Inst.getOperand(0).getReg();
1222 // Empty register lists are not allowed.
1223 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1224 for (unsigned i = 0; i < 16; ++i) {
1225 if (Val & (1 << i)) {
1226 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1227 return MCDisassembler::Fail;
1228 // Writeback not allowed if Rn is in the target list.
1229 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1230 Check(S, MCDisassembler::SoftFail);
1237 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1238 uint64_t Address, const void *Decoder) {
1239 DecodeStatus S = MCDisassembler::Success;
1241 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1242 unsigned regs = fieldFromInstruction(Val, 0, 8);
1244 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1245 return MCDisassembler::Fail;
1246 for (unsigned i = 0; i < (regs - 1); ++i) {
1247 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1248 return MCDisassembler::Fail;
1254 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1255 uint64_t Address, const void *Decoder) {
1256 DecodeStatus S = MCDisassembler::Success;
1258 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1259 unsigned regs = fieldFromInstruction(Val, 0, 8);
1263 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1264 return MCDisassembler::Fail;
1265 for (unsigned i = 0; i < (regs - 1); ++i) {
1266 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1267 return MCDisassembler::Fail;
1273 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1274 uint64_t Address, const void *Decoder) {
1275 // This operand encodes a mask of contiguous zeros between a specified MSB
1276 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1277 // the mask of all bits LSB-and-lower, and then xor them to create
1278 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1279 // create the final mask.
1280 unsigned msb = fieldFromInstruction(Val, 5, 5);
1281 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1283 DecodeStatus S = MCDisassembler::Success;
1284 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1286 uint32_t msb_mask = 0xFFFFFFFF;
1287 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1288 uint32_t lsb_mask = (1U << lsb) - 1;
1290 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1294 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1295 uint64_t Address, const void *Decoder) {
1296 DecodeStatus S = MCDisassembler::Success;
1298 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1299 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1300 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1301 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1302 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1303 unsigned U = fieldFromInstruction(Insn, 23, 1);
1305 switch (Inst.getOpcode()) {
1306 case ARM::LDC_OFFSET:
1309 case ARM::LDC_OPTION:
1310 case ARM::LDCL_OFFSET:
1312 case ARM::LDCL_POST:
1313 case ARM::LDCL_OPTION:
1314 case ARM::STC_OFFSET:
1317 case ARM::STC_OPTION:
1318 case ARM::STCL_OFFSET:
1320 case ARM::STCL_POST:
1321 case ARM::STCL_OPTION:
1322 case ARM::t2LDC_OFFSET:
1323 case ARM::t2LDC_PRE:
1324 case ARM::t2LDC_POST:
1325 case ARM::t2LDC_OPTION:
1326 case ARM::t2LDCL_OFFSET:
1327 case ARM::t2LDCL_PRE:
1328 case ARM::t2LDCL_POST:
1329 case ARM::t2LDCL_OPTION:
1330 case ARM::t2STC_OFFSET:
1331 case ARM::t2STC_PRE:
1332 case ARM::t2STC_POST:
1333 case ARM::t2STC_OPTION:
1334 case ARM::t2STCL_OFFSET:
1335 case ARM::t2STCL_PRE:
1336 case ARM::t2STCL_POST:
1337 case ARM::t2STCL_OPTION:
1338 if (coproc == 0xA || coproc == 0xB)
1339 return MCDisassembler::Fail;
1345 Inst.addOperand(MCOperand::CreateImm(coproc));
1346 Inst.addOperand(MCOperand::CreateImm(CRd));
1347 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1348 return MCDisassembler::Fail;
1350 switch (Inst.getOpcode()) {
1351 case ARM::t2LDC2_OFFSET:
1352 case ARM::t2LDC2L_OFFSET:
1353 case ARM::t2LDC2_PRE:
1354 case ARM::t2LDC2L_PRE:
1355 case ARM::t2STC2_OFFSET:
1356 case ARM::t2STC2L_OFFSET:
1357 case ARM::t2STC2_PRE:
1358 case ARM::t2STC2L_PRE:
1359 case ARM::LDC2_OFFSET:
1360 case ARM::LDC2L_OFFSET:
1362 case ARM::LDC2L_PRE:
1363 case ARM::STC2_OFFSET:
1364 case ARM::STC2L_OFFSET:
1366 case ARM::STC2L_PRE:
1367 case ARM::t2LDC_OFFSET:
1368 case ARM::t2LDCL_OFFSET:
1369 case ARM::t2LDC_PRE:
1370 case ARM::t2LDCL_PRE:
1371 case ARM::t2STC_OFFSET:
1372 case ARM::t2STCL_OFFSET:
1373 case ARM::t2STC_PRE:
1374 case ARM::t2STCL_PRE:
1375 case ARM::LDC_OFFSET:
1376 case ARM::LDCL_OFFSET:
1379 case ARM::STC_OFFSET:
1380 case ARM::STCL_OFFSET:
1383 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1384 Inst.addOperand(MCOperand::CreateImm(imm));
1386 case ARM::t2LDC2_POST:
1387 case ARM::t2LDC2L_POST:
1388 case ARM::t2STC2_POST:
1389 case ARM::t2STC2L_POST:
1390 case ARM::LDC2_POST:
1391 case ARM::LDC2L_POST:
1392 case ARM::STC2_POST:
1393 case ARM::STC2L_POST:
1394 case ARM::t2LDC_POST:
1395 case ARM::t2LDCL_POST:
1396 case ARM::t2STC_POST:
1397 case ARM::t2STCL_POST:
1399 case ARM::LDCL_POST:
1401 case ARM::STCL_POST:
1405 // The 'option' variant doesn't encode 'U' in the immediate since
1406 // the immediate is unsigned [0,255].
1407 Inst.addOperand(MCOperand::CreateImm(imm));
1411 switch (Inst.getOpcode()) {
1412 case ARM::LDC_OFFSET:
1415 case ARM::LDC_OPTION:
1416 case ARM::LDCL_OFFSET:
1418 case ARM::LDCL_POST:
1419 case ARM::LDCL_OPTION:
1420 case ARM::STC_OFFSET:
1423 case ARM::STC_OPTION:
1424 case ARM::STCL_OFFSET:
1426 case ARM::STCL_POST:
1427 case ARM::STCL_OPTION:
1428 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1429 return MCDisassembler::Fail;
1439 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1440 uint64_t Address, const void *Decoder) {
1441 DecodeStatus S = MCDisassembler::Success;
1443 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1444 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1445 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1446 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1447 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1448 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1449 unsigned P = fieldFromInstruction(Insn, 24, 1);
1450 unsigned W = fieldFromInstruction(Insn, 21, 1);
1452 // On stores, the writeback operand precedes Rt.
1453 switch (Inst.getOpcode()) {
1454 case ARM::STR_POST_IMM:
1455 case ARM::STR_POST_REG:
1456 case ARM::STRB_POST_IMM:
1457 case ARM::STRB_POST_REG:
1458 case ARM::STRT_POST_REG:
1459 case ARM::STRT_POST_IMM:
1460 case ARM::STRBT_POST_REG:
1461 case ARM::STRBT_POST_IMM:
1462 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1463 return MCDisassembler::Fail;
1469 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1470 return MCDisassembler::Fail;
1472 // On loads, the writeback operand comes after Rt.
1473 switch (Inst.getOpcode()) {
1474 case ARM::LDR_POST_IMM:
1475 case ARM::LDR_POST_REG:
1476 case ARM::LDRB_POST_IMM:
1477 case ARM::LDRB_POST_REG:
1478 case ARM::LDRBT_POST_REG:
1479 case ARM::LDRBT_POST_IMM:
1480 case ARM::LDRT_POST_REG:
1481 case ARM::LDRT_POST_IMM:
1482 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1483 return MCDisassembler::Fail;
1489 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1490 return MCDisassembler::Fail;
1492 ARM_AM::AddrOpc Op = ARM_AM::add;
1493 if (!fieldFromInstruction(Insn, 23, 1))
1496 bool writeback = (P == 0) || (W == 1);
1497 unsigned idx_mode = 0;
1499 idx_mode = ARMII::IndexModePre;
1500 else if (!P && writeback)
1501 idx_mode = ARMII::IndexModePost;
1503 if (writeback && (Rn == 15 || Rn == Rt))
1504 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1507 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1508 return MCDisassembler::Fail;
1509 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1510 switch( fieldFromInstruction(Insn, 5, 2)) {
1524 return MCDisassembler::Fail;
1526 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1527 if (Opc == ARM_AM::ror && amt == 0)
1529 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1531 Inst.addOperand(MCOperand::CreateImm(imm));
1533 Inst.addOperand(MCOperand::CreateReg(0));
1534 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1535 Inst.addOperand(MCOperand::CreateImm(tmp));
1538 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1539 return MCDisassembler::Fail;
1544 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1545 uint64_t Address, const void *Decoder) {
1546 DecodeStatus S = MCDisassembler::Success;
1548 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1549 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1550 unsigned type = fieldFromInstruction(Val, 5, 2);
1551 unsigned imm = fieldFromInstruction(Val, 7, 5);
1552 unsigned U = fieldFromInstruction(Val, 12, 1);
1554 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1570 if (ShOp == ARM_AM::ror && imm == 0)
1573 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1574 return MCDisassembler::Fail;
1575 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1576 return MCDisassembler::Fail;
1579 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1581 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1582 Inst.addOperand(MCOperand::CreateImm(shift));
1588 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1589 uint64_t Address, const void *Decoder) {
1590 DecodeStatus S = MCDisassembler::Success;
1592 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1593 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1594 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1595 unsigned type = fieldFromInstruction(Insn, 22, 1);
1596 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1597 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1598 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1599 unsigned W = fieldFromInstruction(Insn, 21, 1);
1600 unsigned P = fieldFromInstruction(Insn, 24, 1);
1601 unsigned Rt2 = Rt + 1;
1603 bool writeback = (W == 1) | (P == 0);
1605 // For {LD,ST}RD, Rt must be even, else undefined.
1606 switch (Inst.getOpcode()) {
1609 case ARM::STRD_POST:
1612 case ARM::LDRD_POST:
1613 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1618 switch (Inst.getOpcode()) {
1621 case ARM::STRD_POST:
1622 if (P == 0 && W == 1)
1623 S = MCDisassembler::SoftFail;
1625 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1626 S = MCDisassembler::SoftFail;
1627 if (type && Rm == 15)
1628 S = MCDisassembler::SoftFail;
1630 S = MCDisassembler::SoftFail;
1631 if (!type && fieldFromInstruction(Insn, 8, 4))
1632 S = MCDisassembler::SoftFail;
1636 case ARM::STRH_POST:
1638 S = MCDisassembler::SoftFail;
1639 if (writeback && (Rn == 15 || Rn == Rt))
1640 S = MCDisassembler::SoftFail;
1641 if (!type && Rm == 15)
1642 S = MCDisassembler::SoftFail;
1646 case ARM::LDRD_POST:
1647 if (type && Rn == 15){
1649 S = MCDisassembler::SoftFail;
1652 if (P == 0 && W == 1)
1653 S = MCDisassembler::SoftFail;
1654 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1655 S = MCDisassembler::SoftFail;
1656 if (!type && writeback && Rn == 15)
1657 S = MCDisassembler::SoftFail;
1658 if (writeback && (Rn == Rt || Rn == Rt2))
1659 S = MCDisassembler::SoftFail;
1663 case ARM::LDRH_POST:
1664 if (type && Rn == 15){
1666 S = MCDisassembler::SoftFail;
1670 S = MCDisassembler::SoftFail;
1671 if (!type && Rm == 15)
1672 S = MCDisassembler::SoftFail;
1673 if (!type && writeback && (Rn == 15 || Rn == Rt))
1674 S = MCDisassembler::SoftFail;
1677 case ARM::LDRSH_PRE:
1678 case ARM::LDRSH_POST:
1680 case ARM::LDRSB_PRE:
1681 case ARM::LDRSB_POST:
1682 if (type && Rn == 15){
1684 S = MCDisassembler::SoftFail;
1687 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1688 S = MCDisassembler::SoftFail;
1689 if (!type && (Rt == 15 || Rm == 15))
1690 S = MCDisassembler::SoftFail;
1691 if (!type && writeback && (Rn == 15 || Rn == Rt))
1692 S = MCDisassembler::SoftFail;
1698 if (writeback) { // Writeback
1700 U |= ARMII::IndexModePre << 9;
1702 U |= ARMII::IndexModePost << 9;
1704 // On stores, the writeback operand precedes Rt.
1705 switch (Inst.getOpcode()) {
1708 case ARM::STRD_POST:
1711 case ARM::STRH_POST:
1712 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1713 return MCDisassembler::Fail;
1720 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1721 return MCDisassembler::Fail;
1722 switch (Inst.getOpcode()) {
1725 case ARM::STRD_POST:
1728 case ARM::LDRD_POST:
1729 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1730 return MCDisassembler::Fail;
1737 // On loads, the writeback operand comes after Rt.
1738 switch (Inst.getOpcode()) {
1741 case ARM::LDRD_POST:
1744 case ARM::LDRH_POST:
1746 case ARM::LDRSH_PRE:
1747 case ARM::LDRSH_POST:
1749 case ARM::LDRSB_PRE:
1750 case ARM::LDRSB_POST:
1753 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1754 return MCDisassembler::Fail;
1761 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1762 return MCDisassembler::Fail;
1765 Inst.addOperand(MCOperand::CreateReg(0));
1766 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1768 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1769 return MCDisassembler::Fail;
1770 Inst.addOperand(MCOperand::CreateImm(U));
1773 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1774 return MCDisassembler::Fail;
1779 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1780 uint64_t Address, const void *Decoder) {
1781 DecodeStatus S = MCDisassembler::Success;
1783 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1784 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1801 Inst.addOperand(MCOperand::CreateImm(mode));
1802 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1803 return MCDisassembler::Fail;
1808 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1810 uint64_t Address, const void *Decoder) {
1811 DecodeStatus S = MCDisassembler::Success;
1813 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1814 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1815 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1818 switch (Inst.getOpcode()) {
1820 Inst.setOpcode(ARM::RFEDA);
1822 case ARM::LDMDA_UPD:
1823 Inst.setOpcode(ARM::RFEDA_UPD);
1826 Inst.setOpcode(ARM::RFEDB);
1828 case ARM::LDMDB_UPD:
1829 Inst.setOpcode(ARM::RFEDB_UPD);
1832 Inst.setOpcode(ARM::RFEIA);
1834 case ARM::LDMIA_UPD:
1835 Inst.setOpcode(ARM::RFEIA_UPD);
1838 Inst.setOpcode(ARM::RFEIB);
1840 case ARM::LDMIB_UPD:
1841 Inst.setOpcode(ARM::RFEIB_UPD);
1844 Inst.setOpcode(ARM::SRSDA);
1846 case ARM::STMDA_UPD:
1847 Inst.setOpcode(ARM::SRSDA_UPD);
1850 Inst.setOpcode(ARM::SRSDB);
1852 case ARM::STMDB_UPD:
1853 Inst.setOpcode(ARM::SRSDB_UPD);
1856 Inst.setOpcode(ARM::SRSIA);
1858 case ARM::STMIA_UPD:
1859 Inst.setOpcode(ARM::SRSIA_UPD);
1862 Inst.setOpcode(ARM::SRSIB);
1864 case ARM::STMIB_UPD:
1865 Inst.setOpcode(ARM::SRSIB_UPD);
1868 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1871 // For stores (which become SRS's, the only operand is the mode.
1872 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1874 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1878 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1881 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1882 return MCDisassembler::Fail;
1883 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1884 return MCDisassembler::Fail; // Tied
1885 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1886 return MCDisassembler::Fail;
1887 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1888 return MCDisassembler::Fail;
1893 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1894 uint64_t Address, const void *Decoder) {
1895 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1896 unsigned M = fieldFromInstruction(Insn, 17, 1);
1897 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1898 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1900 DecodeStatus S = MCDisassembler::Success;
1902 // imod == '01' --> UNPREDICTABLE
1903 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1904 // return failure here. The '01' imod value is unprintable, so there's
1905 // nothing useful we could do even if we returned UNPREDICTABLE.
1907 if (imod == 1) return MCDisassembler::Fail;
1910 Inst.setOpcode(ARM::CPS3p);
1911 Inst.addOperand(MCOperand::CreateImm(imod));
1912 Inst.addOperand(MCOperand::CreateImm(iflags));
1913 Inst.addOperand(MCOperand::CreateImm(mode));
1914 } else if (imod && !M) {
1915 Inst.setOpcode(ARM::CPS2p);
1916 Inst.addOperand(MCOperand::CreateImm(imod));
1917 Inst.addOperand(MCOperand::CreateImm(iflags));
1918 if (mode) S = MCDisassembler::SoftFail;
1919 } else if (!imod && M) {
1920 Inst.setOpcode(ARM::CPS1p);
1921 Inst.addOperand(MCOperand::CreateImm(mode));
1922 if (iflags) S = MCDisassembler::SoftFail;
1924 // imod == '00' && M == '0' --> UNPREDICTABLE
1925 Inst.setOpcode(ARM::CPS1p);
1926 Inst.addOperand(MCOperand::CreateImm(mode));
1927 S = MCDisassembler::SoftFail;
1933 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1934 uint64_t Address, const void *Decoder) {
1935 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1936 unsigned M = fieldFromInstruction(Insn, 8, 1);
1937 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1938 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1940 DecodeStatus S = MCDisassembler::Success;
1942 // imod == '01' --> UNPREDICTABLE
1943 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1944 // return failure here. The '01' imod value is unprintable, so there's
1945 // nothing useful we could do even if we returned UNPREDICTABLE.
1947 if (imod == 1) return MCDisassembler::Fail;
1950 Inst.setOpcode(ARM::t2CPS3p);
1951 Inst.addOperand(MCOperand::CreateImm(imod));
1952 Inst.addOperand(MCOperand::CreateImm(iflags));
1953 Inst.addOperand(MCOperand::CreateImm(mode));
1954 } else if (imod && !M) {
1955 Inst.setOpcode(ARM::t2CPS2p);
1956 Inst.addOperand(MCOperand::CreateImm(imod));
1957 Inst.addOperand(MCOperand::CreateImm(iflags));
1958 if (mode) S = MCDisassembler::SoftFail;
1959 } else if (!imod && M) {
1960 Inst.setOpcode(ARM::t2CPS1p);
1961 Inst.addOperand(MCOperand::CreateImm(mode));
1962 if (iflags) S = MCDisassembler::SoftFail;
1964 // imod == '00' && M == '0' --> UNPREDICTABLE
1965 Inst.setOpcode(ARM::t2CPS1p);
1966 Inst.addOperand(MCOperand::CreateImm(mode));
1967 S = MCDisassembler::SoftFail;
1973 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1974 uint64_t Address, const void *Decoder) {
1975 DecodeStatus S = MCDisassembler::Success;
1977 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
1980 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
1981 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
1982 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1983 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
1985 if (Inst.getOpcode() == ARM::t2MOVTi16)
1986 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1987 return MCDisassembler::Fail;
1988 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1989 return MCDisassembler::Fail;
1991 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1992 Inst.addOperand(MCOperand::CreateImm(imm));
1997 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1998 uint64_t Address, const void *Decoder) {
1999 DecodeStatus S = MCDisassembler::Success;
2001 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2002 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2005 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2006 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2008 if (Inst.getOpcode() == ARM::MOVTi16)
2009 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2010 return MCDisassembler::Fail;
2011 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2012 return MCDisassembler::Fail;
2014 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2015 Inst.addOperand(MCOperand::CreateImm(imm));
2017 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2018 return MCDisassembler::Fail;
2023 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2024 uint64_t Address, const void *Decoder) {
2025 DecodeStatus S = MCDisassembler::Success;
2027 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2028 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2029 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2030 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2031 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2034 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2036 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2037 return MCDisassembler::Fail;
2038 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2039 return MCDisassembler::Fail;
2040 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2041 return MCDisassembler::Fail;
2042 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2043 return MCDisassembler::Fail;
2045 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2046 return MCDisassembler::Fail;
2051 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2052 uint64_t Address, const void *Decoder) {
2053 DecodeStatus S = MCDisassembler::Success;
2055 unsigned add = fieldFromInstruction(Val, 12, 1);
2056 unsigned imm = fieldFromInstruction(Val, 0, 12);
2057 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2059 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2060 return MCDisassembler::Fail;
2062 if (!add) imm *= -1;
2063 if (imm == 0 && !add) imm = INT32_MIN;
2064 Inst.addOperand(MCOperand::CreateImm(imm));
2066 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2071 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2072 uint64_t Address, const void *Decoder) {
2073 DecodeStatus S = MCDisassembler::Success;
2075 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2076 unsigned U = fieldFromInstruction(Val, 8, 1);
2077 unsigned imm = fieldFromInstruction(Val, 0, 8);
2079 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2080 return MCDisassembler::Fail;
2083 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2085 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2090 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2091 uint64_t Address, const void *Decoder) {
2092 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2096 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2097 uint64_t Address, const void *Decoder) {
2098 DecodeStatus S = MCDisassembler::Success;
2099 unsigned imm = (fieldFromInstruction(Insn, 0, 11) << 0) |
2100 (fieldFromInstruction(Insn, 11, 1) << 18) |
2101 (fieldFromInstruction(Insn, 13, 1) << 17) |
2102 (fieldFromInstruction(Insn, 16, 6) << 11) |
2103 (fieldFromInstruction(Insn, 26, 1) << 19);
2104 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<20>(imm<<1) + 4,
2105 true, 4, Inst, Decoder))
2106 Inst.addOperand(MCOperand::CreateImm(SignExtend32<20>(imm << 1)));
2111 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2112 uint64_t Address, const void *Decoder) {
2113 DecodeStatus S = MCDisassembler::Success;
2115 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2116 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2119 Inst.setOpcode(ARM::BLXi);
2120 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2121 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2122 true, 4, Inst, Decoder))
2123 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2127 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2128 true, 4, Inst, Decoder))
2129 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2130 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2131 return MCDisassembler::Fail;
2137 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2138 uint64_t Address, const void *Decoder) {
2139 DecodeStatus S = MCDisassembler::Success;
2141 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2142 unsigned align = fieldFromInstruction(Val, 4, 2);
2144 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2145 return MCDisassembler::Fail;
2147 Inst.addOperand(MCOperand::CreateImm(0));
2149 Inst.addOperand(MCOperand::CreateImm(4 << align));
2154 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2155 uint64_t Address, const void *Decoder) {
2156 DecodeStatus S = MCDisassembler::Success;
2158 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2159 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2160 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2161 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2162 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2163 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2165 // First output register
2166 switch (Inst.getOpcode()) {
2167 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2168 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2169 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2170 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2171 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2172 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2173 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2174 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2175 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2176 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2177 return MCDisassembler::Fail;
2182 case ARM::VLD2b16wb_fixed:
2183 case ARM::VLD2b16wb_register:
2184 case ARM::VLD2b32wb_fixed:
2185 case ARM::VLD2b32wb_register:
2186 case ARM::VLD2b8wb_fixed:
2187 case ARM::VLD2b8wb_register:
2188 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2189 return MCDisassembler::Fail;
2192 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2193 return MCDisassembler::Fail;
2196 // Second output register
2197 switch (Inst.getOpcode()) {
2201 case ARM::VLD3d8_UPD:
2202 case ARM::VLD3d16_UPD:
2203 case ARM::VLD3d32_UPD:
2207 case ARM::VLD4d8_UPD:
2208 case ARM::VLD4d16_UPD:
2209 case ARM::VLD4d32_UPD:
2210 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2211 return MCDisassembler::Fail;
2216 case ARM::VLD3q8_UPD:
2217 case ARM::VLD3q16_UPD:
2218 case ARM::VLD3q32_UPD:
2222 case ARM::VLD4q8_UPD:
2223 case ARM::VLD4q16_UPD:
2224 case ARM::VLD4q32_UPD:
2225 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2226 return MCDisassembler::Fail;
2231 // Third output register
2232 switch(Inst.getOpcode()) {
2236 case ARM::VLD3d8_UPD:
2237 case ARM::VLD3d16_UPD:
2238 case ARM::VLD3d32_UPD:
2242 case ARM::VLD4d8_UPD:
2243 case ARM::VLD4d16_UPD:
2244 case ARM::VLD4d32_UPD:
2245 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2246 return MCDisassembler::Fail;
2251 case ARM::VLD3q8_UPD:
2252 case ARM::VLD3q16_UPD:
2253 case ARM::VLD3q32_UPD:
2257 case ARM::VLD4q8_UPD:
2258 case ARM::VLD4q16_UPD:
2259 case ARM::VLD4q32_UPD:
2260 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2261 return MCDisassembler::Fail;
2267 // Fourth output register
2268 switch (Inst.getOpcode()) {
2272 case ARM::VLD4d8_UPD:
2273 case ARM::VLD4d16_UPD:
2274 case ARM::VLD4d32_UPD:
2275 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2276 return MCDisassembler::Fail;
2281 case ARM::VLD4q8_UPD:
2282 case ARM::VLD4q16_UPD:
2283 case ARM::VLD4q32_UPD:
2284 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2285 return MCDisassembler::Fail;
2291 // Writeback operand
2292 switch (Inst.getOpcode()) {
2293 case ARM::VLD1d8wb_fixed:
2294 case ARM::VLD1d16wb_fixed:
2295 case ARM::VLD1d32wb_fixed:
2296 case ARM::VLD1d64wb_fixed:
2297 case ARM::VLD1d8wb_register:
2298 case ARM::VLD1d16wb_register:
2299 case ARM::VLD1d32wb_register:
2300 case ARM::VLD1d64wb_register:
2301 case ARM::VLD1q8wb_fixed:
2302 case ARM::VLD1q16wb_fixed:
2303 case ARM::VLD1q32wb_fixed:
2304 case ARM::VLD1q64wb_fixed:
2305 case ARM::VLD1q8wb_register:
2306 case ARM::VLD1q16wb_register:
2307 case ARM::VLD1q32wb_register:
2308 case ARM::VLD1q64wb_register:
2309 case ARM::VLD1d8Twb_fixed:
2310 case ARM::VLD1d8Twb_register:
2311 case ARM::VLD1d16Twb_fixed:
2312 case ARM::VLD1d16Twb_register:
2313 case ARM::VLD1d32Twb_fixed:
2314 case ARM::VLD1d32Twb_register:
2315 case ARM::VLD1d64Twb_fixed:
2316 case ARM::VLD1d64Twb_register:
2317 case ARM::VLD1d8Qwb_fixed:
2318 case ARM::VLD1d8Qwb_register:
2319 case ARM::VLD1d16Qwb_fixed:
2320 case ARM::VLD1d16Qwb_register:
2321 case ARM::VLD1d32Qwb_fixed:
2322 case ARM::VLD1d32Qwb_register:
2323 case ARM::VLD1d64Qwb_fixed:
2324 case ARM::VLD1d64Qwb_register:
2325 case ARM::VLD2d8wb_fixed:
2326 case ARM::VLD2d16wb_fixed:
2327 case ARM::VLD2d32wb_fixed:
2328 case ARM::VLD2q8wb_fixed:
2329 case ARM::VLD2q16wb_fixed:
2330 case ARM::VLD2q32wb_fixed:
2331 case ARM::VLD2d8wb_register:
2332 case ARM::VLD2d16wb_register:
2333 case ARM::VLD2d32wb_register:
2334 case ARM::VLD2q8wb_register:
2335 case ARM::VLD2q16wb_register:
2336 case ARM::VLD2q32wb_register:
2337 case ARM::VLD2b8wb_fixed:
2338 case ARM::VLD2b16wb_fixed:
2339 case ARM::VLD2b32wb_fixed:
2340 case ARM::VLD2b8wb_register:
2341 case ARM::VLD2b16wb_register:
2342 case ARM::VLD2b32wb_register:
2343 Inst.addOperand(MCOperand::CreateImm(0));
2345 case ARM::VLD3d8_UPD:
2346 case ARM::VLD3d16_UPD:
2347 case ARM::VLD3d32_UPD:
2348 case ARM::VLD3q8_UPD:
2349 case ARM::VLD3q16_UPD:
2350 case ARM::VLD3q32_UPD:
2351 case ARM::VLD4d8_UPD:
2352 case ARM::VLD4d16_UPD:
2353 case ARM::VLD4d32_UPD:
2354 case ARM::VLD4q8_UPD:
2355 case ARM::VLD4q16_UPD:
2356 case ARM::VLD4q32_UPD:
2357 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2358 return MCDisassembler::Fail;
2364 // AddrMode6 Base (register+alignment)
2365 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2366 return MCDisassembler::Fail;
2368 // AddrMode6 Offset (register)
2369 switch (Inst.getOpcode()) {
2371 // The below have been updated to have explicit am6offset split
2372 // between fixed and register offset. For those instructions not
2373 // yet updated, we need to add an additional reg0 operand for the
2376 // The fixed offset encodes as Rm == 0xd, so we check for that.
2378 Inst.addOperand(MCOperand::CreateReg(0));
2381 // Fall through to handle the register offset variant.
2382 case ARM::VLD1d8wb_fixed:
2383 case ARM::VLD1d16wb_fixed:
2384 case ARM::VLD1d32wb_fixed:
2385 case ARM::VLD1d64wb_fixed:
2386 case ARM::VLD1d8Twb_fixed:
2387 case ARM::VLD1d16Twb_fixed:
2388 case ARM::VLD1d32Twb_fixed:
2389 case ARM::VLD1d64Twb_fixed:
2390 case ARM::VLD1d8Qwb_fixed:
2391 case ARM::VLD1d16Qwb_fixed:
2392 case ARM::VLD1d32Qwb_fixed:
2393 case ARM::VLD1d64Qwb_fixed:
2394 case ARM::VLD1d8wb_register:
2395 case ARM::VLD1d16wb_register:
2396 case ARM::VLD1d32wb_register:
2397 case ARM::VLD1d64wb_register:
2398 case ARM::VLD1q8wb_fixed:
2399 case ARM::VLD1q16wb_fixed:
2400 case ARM::VLD1q32wb_fixed:
2401 case ARM::VLD1q64wb_fixed:
2402 case ARM::VLD1q8wb_register:
2403 case ARM::VLD1q16wb_register:
2404 case ARM::VLD1q32wb_register:
2405 case ARM::VLD1q64wb_register:
2406 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2407 // variant encodes Rm == 0xf. Anything else is a register offset post-
2408 // increment and we need to add the register operand to the instruction.
2409 if (Rm != 0xD && Rm != 0xF &&
2410 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2411 return MCDisassembler::Fail;
2413 case ARM::VLD2d8wb_fixed:
2414 case ARM::VLD2d16wb_fixed:
2415 case ARM::VLD2d32wb_fixed:
2416 case ARM::VLD2b8wb_fixed:
2417 case ARM::VLD2b16wb_fixed:
2418 case ARM::VLD2b32wb_fixed:
2419 case ARM::VLD2q8wb_fixed:
2420 case ARM::VLD2q16wb_fixed:
2421 case ARM::VLD2q32wb_fixed:
2428 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2429 uint64_t Address, const void *Decoder) {
2430 DecodeStatus S = MCDisassembler::Success;
2432 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2433 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2434 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2435 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2436 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2437 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2439 // Writeback Operand
2440 switch (Inst.getOpcode()) {
2441 case ARM::VST1d8wb_fixed:
2442 case ARM::VST1d16wb_fixed:
2443 case ARM::VST1d32wb_fixed:
2444 case ARM::VST1d64wb_fixed:
2445 case ARM::VST1d8wb_register:
2446 case ARM::VST1d16wb_register:
2447 case ARM::VST1d32wb_register:
2448 case ARM::VST1d64wb_register:
2449 case ARM::VST1q8wb_fixed:
2450 case ARM::VST1q16wb_fixed:
2451 case ARM::VST1q32wb_fixed:
2452 case ARM::VST1q64wb_fixed:
2453 case ARM::VST1q8wb_register:
2454 case ARM::VST1q16wb_register:
2455 case ARM::VST1q32wb_register:
2456 case ARM::VST1q64wb_register:
2457 case ARM::VST1d8Twb_fixed:
2458 case ARM::VST1d16Twb_fixed:
2459 case ARM::VST1d32Twb_fixed:
2460 case ARM::VST1d64Twb_fixed:
2461 case ARM::VST1d8Twb_register:
2462 case ARM::VST1d16Twb_register:
2463 case ARM::VST1d32Twb_register:
2464 case ARM::VST1d64Twb_register:
2465 case ARM::VST1d8Qwb_fixed:
2466 case ARM::VST1d16Qwb_fixed:
2467 case ARM::VST1d32Qwb_fixed:
2468 case ARM::VST1d64Qwb_fixed:
2469 case ARM::VST1d8Qwb_register:
2470 case ARM::VST1d16Qwb_register:
2471 case ARM::VST1d32Qwb_register:
2472 case ARM::VST1d64Qwb_register:
2473 case ARM::VST2d8wb_fixed:
2474 case ARM::VST2d16wb_fixed:
2475 case ARM::VST2d32wb_fixed:
2476 case ARM::VST2d8wb_register:
2477 case ARM::VST2d16wb_register:
2478 case ARM::VST2d32wb_register:
2479 case ARM::VST2q8wb_fixed:
2480 case ARM::VST2q16wb_fixed:
2481 case ARM::VST2q32wb_fixed:
2482 case ARM::VST2q8wb_register:
2483 case ARM::VST2q16wb_register:
2484 case ARM::VST2q32wb_register:
2485 case ARM::VST2b8wb_fixed:
2486 case ARM::VST2b16wb_fixed:
2487 case ARM::VST2b32wb_fixed:
2488 case ARM::VST2b8wb_register:
2489 case ARM::VST2b16wb_register:
2490 case ARM::VST2b32wb_register:
2492 return MCDisassembler::Fail;
2493 Inst.addOperand(MCOperand::CreateImm(0));
2495 case ARM::VST3d8_UPD:
2496 case ARM::VST3d16_UPD:
2497 case ARM::VST3d32_UPD:
2498 case ARM::VST3q8_UPD:
2499 case ARM::VST3q16_UPD:
2500 case ARM::VST3q32_UPD:
2501 case ARM::VST4d8_UPD:
2502 case ARM::VST4d16_UPD:
2503 case ARM::VST4d32_UPD:
2504 case ARM::VST4q8_UPD:
2505 case ARM::VST4q16_UPD:
2506 case ARM::VST4q32_UPD:
2507 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2508 return MCDisassembler::Fail;
2514 // AddrMode6 Base (register+alignment)
2515 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2516 return MCDisassembler::Fail;
2518 // AddrMode6 Offset (register)
2519 switch (Inst.getOpcode()) {
2522 Inst.addOperand(MCOperand::CreateReg(0));
2523 else if (Rm != 0xF) {
2524 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2525 return MCDisassembler::Fail;
2528 case ARM::VST1d8wb_fixed:
2529 case ARM::VST1d16wb_fixed:
2530 case ARM::VST1d32wb_fixed:
2531 case ARM::VST1d64wb_fixed:
2532 case ARM::VST1q8wb_fixed:
2533 case ARM::VST1q16wb_fixed:
2534 case ARM::VST1q32wb_fixed:
2535 case ARM::VST1q64wb_fixed:
2536 case ARM::VST1d8Twb_fixed:
2537 case ARM::VST1d16Twb_fixed:
2538 case ARM::VST1d32Twb_fixed:
2539 case ARM::VST1d64Twb_fixed:
2540 case ARM::VST1d8Qwb_fixed:
2541 case ARM::VST1d16Qwb_fixed:
2542 case ARM::VST1d32Qwb_fixed:
2543 case ARM::VST1d64Qwb_fixed:
2544 case ARM::VST2d8wb_fixed:
2545 case ARM::VST2d16wb_fixed:
2546 case ARM::VST2d32wb_fixed:
2547 case ARM::VST2q8wb_fixed:
2548 case ARM::VST2q16wb_fixed:
2549 case ARM::VST2q32wb_fixed:
2550 case ARM::VST2b8wb_fixed:
2551 case ARM::VST2b16wb_fixed:
2552 case ARM::VST2b32wb_fixed:
2557 // First input register
2558 switch (Inst.getOpcode()) {
2563 case ARM::VST1q16wb_fixed:
2564 case ARM::VST1q16wb_register:
2565 case ARM::VST1q32wb_fixed:
2566 case ARM::VST1q32wb_register:
2567 case ARM::VST1q64wb_fixed:
2568 case ARM::VST1q64wb_register:
2569 case ARM::VST1q8wb_fixed:
2570 case ARM::VST1q8wb_register:
2574 case ARM::VST2d16wb_fixed:
2575 case ARM::VST2d16wb_register:
2576 case ARM::VST2d32wb_fixed:
2577 case ARM::VST2d32wb_register:
2578 case ARM::VST2d8wb_fixed:
2579 case ARM::VST2d8wb_register:
2580 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2581 return MCDisassembler::Fail;
2586 case ARM::VST2b16wb_fixed:
2587 case ARM::VST2b16wb_register:
2588 case ARM::VST2b32wb_fixed:
2589 case ARM::VST2b32wb_register:
2590 case ARM::VST2b8wb_fixed:
2591 case ARM::VST2b8wb_register:
2592 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2593 return MCDisassembler::Fail;
2596 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2597 return MCDisassembler::Fail;
2600 // Second input register
2601 switch (Inst.getOpcode()) {
2605 case ARM::VST3d8_UPD:
2606 case ARM::VST3d16_UPD:
2607 case ARM::VST3d32_UPD:
2611 case ARM::VST4d8_UPD:
2612 case ARM::VST4d16_UPD:
2613 case ARM::VST4d32_UPD:
2614 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2615 return MCDisassembler::Fail;
2620 case ARM::VST3q8_UPD:
2621 case ARM::VST3q16_UPD:
2622 case ARM::VST3q32_UPD:
2626 case ARM::VST4q8_UPD:
2627 case ARM::VST4q16_UPD:
2628 case ARM::VST4q32_UPD:
2629 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2630 return MCDisassembler::Fail;
2636 // Third input register
2637 switch (Inst.getOpcode()) {
2641 case ARM::VST3d8_UPD:
2642 case ARM::VST3d16_UPD:
2643 case ARM::VST3d32_UPD:
2647 case ARM::VST4d8_UPD:
2648 case ARM::VST4d16_UPD:
2649 case ARM::VST4d32_UPD:
2650 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2651 return MCDisassembler::Fail;
2656 case ARM::VST3q8_UPD:
2657 case ARM::VST3q16_UPD:
2658 case ARM::VST3q32_UPD:
2662 case ARM::VST4q8_UPD:
2663 case ARM::VST4q16_UPD:
2664 case ARM::VST4q32_UPD:
2665 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2666 return MCDisassembler::Fail;
2672 // Fourth input register
2673 switch (Inst.getOpcode()) {
2677 case ARM::VST4d8_UPD:
2678 case ARM::VST4d16_UPD:
2679 case ARM::VST4d32_UPD:
2680 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2681 return MCDisassembler::Fail;
2686 case ARM::VST4q8_UPD:
2687 case ARM::VST4q16_UPD:
2688 case ARM::VST4q32_UPD:
2689 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2690 return MCDisassembler::Fail;
2699 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2700 uint64_t Address, const void *Decoder) {
2701 DecodeStatus S = MCDisassembler::Success;
2703 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2704 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2705 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2706 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2707 unsigned align = fieldFromInstruction(Insn, 4, 1);
2708 unsigned size = fieldFromInstruction(Insn, 6, 2);
2710 if (size == 0 && align == 1)
2711 return MCDisassembler::Fail;
2712 align *= (1 << size);
2714 switch (Inst.getOpcode()) {
2715 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2716 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2717 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2718 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2719 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2720 return MCDisassembler::Fail;
2723 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2724 return MCDisassembler::Fail;
2728 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2729 return MCDisassembler::Fail;
2732 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2733 return MCDisassembler::Fail;
2734 Inst.addOperand(MCOperand::CreateImm(align));
2736 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2737 // variant encodes Rm == 0xf. Anything else is a register offset post-
2738 // increment and we need to add the register operand to the instruction.
2739 if (Rm != 0xD && Rm != 0xF &&
2740 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2741 return MCDisassembler::Fail;
2746 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2747 uint64_t Address, const void *Decoder) {
2748 DecodeStatus S = MCDisassembler::Success;
2750 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2751 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2752 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2753 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2754 unsigned align = fieldFromInstruction(Insn, 4, 1);
2755 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2758 switch (Inst.getOpcode()) {
2759 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2760 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2761 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2762 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2763 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2764 return MCDisassembler::Fail;
2766 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2767 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2768 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2769 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2770 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2771 return MCDisassembler::Fail;
2774 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2775 return MCDisassembler::Fail;
2780 Inst.addOperand(MCOperand::CreateImm(0));
2782 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2783 return MCDisassembler::Fail;
2784 Inst.addOperand(MCOperand::CreateImm(align));
2786 if (Rm != 0xD && Rm != 0xF) {
2787 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2788 return MCDisassembler::Fail;
2794 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2795 uint64_t Address, const void *Decoder) {
2796 DecodeStatus S = MCDisassembler::Success;
2798 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2799 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2800 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2801 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2802 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2804 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2805 return MCDisassembler::Fail;
2806 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2807 return MCDisassembler::Fail;
2808 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2809 return MCDisassembler::Fail;
2811 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2812 return MCDisassembler::Fail;
2815 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2816 return MCDisassembler::Fail;
2817 Inst.addOperand(MCOperand::CreateImm(0));
2820 Inst.addOperand(MCOperand::CreateReg(0));
2821 else if (Rm != 0xF) {
2822 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2823 return MCDisassembler::Fail;
2829 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2830 uint64_t Address, const void *Decoder) {
2831 DecodeStatus S = MCDisassembler::Success;
2833 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2834 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2835 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2836 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2837 unsigned size = fieldFromInstruction(Insn, 6, 2);
2838 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2839 unsigned align = fieldFromInstruction(Insn, 4, 1);
2843 return MCDisassembler::Fail;
2856 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2857 return MCDisassembler::Fail;
2858 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2859 return MCDisassembler::Fail;
2860 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2861 return MCDisassembler::Fail;
2862 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2863 return MCDisassembler::Fail;
2865 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2866 return MCDisassembler::Fail;
2869 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2870 return MCDisassembler::Fail;
2871 Inst.addOperand(MCOperand::CreateImm(align));
2874 Inst.addOperand(MCOperand::CreateReg(0));
2875 else if (Rm != 0xF) {
2876 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2877 return MCDisassembler::Fail;
2884 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2885 uint64_t Address, const void *Decoder) {
2886 DecodeStatus S = MCDisassembler::Success;
2888 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2889 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2890 unsigned imm = fieldFromInstruction(Insn, 0, 4);
2891 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2892 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2893 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2894 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2895 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2898 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2899 return MCDisassembler::Fail;
2901 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2902 return MCDisassembler::Fail;
2905 Inst.addOperand(MCOperand::CreateImm(imm));
2907 switch (Inst.getOpcode()) {
2908 case ARM::VORRiv4i16:
2909 case ARM::VORRiv2i32:
2910 case ARM::VBICiv4i16:
2911 case ARM::VBICiv2i32:
2912 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2913 return MCDisassembler::Fail;
2915 case ARM::VORRiv8i16:
2916 case ARM::VORRiv4i32:
2917 case ARM::VBICiv8i16:
2918 case ARM::VBICiv4i32:
2919 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2920 return MCDisassembler::Fail;
2929 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2930 uint64_t Address, const void *Decoder) {
2931 DecodeStatus S = MCDisassembler::Success;
2933 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2934 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2935 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2936 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2937 unsigned size = fieldFromInstruction(Insn, 18, 2);
2939 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2940 return MCDisassembler::Fail;
2941 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2942 return MCDisassembler::Fail;
2943 Inst.addOperand(MCOperand::CreateImm(8 << size));
2948 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2949 uint64_t Address, const void *Decoder) {
2950 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2951 return MCDisassembler::Success;
2954 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2955 uint64_t Address, const void *Decoder) {
2956 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2957 return MCDisassembler::Success;
2960 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2961 uint64_t Address, const void *Decoder) {
2962 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2963 return MCDisassembler::Success;
2966 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2967 uint64_t Address, const void *Decoder) {
2968 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2969 return MCDisassembler::Success;
2972 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2973 uint64_t Address, const void *Decoder) {
2974 DecodeStatus S = MCDisassembler::Success;
2976 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2977 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2978 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2979 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
2980 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2981 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2982 unsigned op = fieldFromInstruction(Insn, 6, 1);
2984 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2985 return MCDisassembler::Fail;
2987 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2988 return MCDisassembler::Fail; // Writeback
2991 switch (Inst.getOpcode()) {
2994 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
2995 return MCDisassembler::Fail;
2998 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
2999 return MCDisassembler::Fail;
3002 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3003 return MCDisassembler::Fail;
3008 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3009 uint64_t Address, const void *Decoder) {
3010 DecodeStatus S = MCDisassembler::Success;
3012 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3013 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3015 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3016 return MCDisassembler::Fail;
3018 switch(Inst.getOpcode()) {
3020 return MCDisassembler::Fail;
3022 break; // tADR does not explicitly represent the PC as an operand.
3024 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3028 Inst.addOperand(MCOperand::CreateImm(imm));
3032 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3033 uint64_t Address, const void *Decoder) {
3034 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3035 true, 2, Inst, Decoder))
3036 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3037 return MCDisassembler::Success;
3040 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3041 uint64_t Address, const void *Decoder) {
3042 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3043 true, 4, Inst, Decoder))
3044 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3045 return MCDisassembler::Success;
3048 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3049 uint64_t Address, const void *Decoder) {
3050 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<7>(Val<<1) + 4,
3051 true, 2, Inst, Decoder))
3052 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
3053 return MCDisassembler::Success;
3056 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3057 uint64_t Address, const void *Decoder) {
3058 DecodeStatus S = MCDisassembler::Success;
3060 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3061 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3063 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3064 return MCDisassembler::Fail;
3065 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3066 return MCDisassembler::Fail;
3071 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3072 uint64_t Address, const void *Decoder) {
3073 DecodeStatus S = MCDisassembler::Success;
3075 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3076 unsigned imm = fieldFromInstruction(Val, 3, 5);
3078 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3079 return MCDisassembler::Fail;
3080 Inst.addOperand(MCOperand::CreateImm(imm));
3085 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3086 uint64_t Address, const void *Decoder) {
3087 unsigned imm = Val << 2;
3089 Inst.addOperand(MCOperand::CreateImm(imm));
3090 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3092 return MCDisassembler::Success;
3095 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3096 uint64_t Address, const void *Decoder) {
3097 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3098 Inst.addOperand(MCOperand::CreateImm(Val));
3100 return MCDisassembler::Success;
3103 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3104 uint64_t Address, const void *Decoder) {
3105 DecodeStatus S = MCDisassembler::Success;
3107 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3108 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3109 unsigned imm = fieldFromInstruction(Val, 0, 2);
3111 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3112 return MCDisassembler::Fail;
3113 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3114 return MCDisassembler::Fail;
3115 Inst.addOperand(MCOperand::CreateImm(imm));
3120 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3121 uint64_t Address, const void *Decoder) {
3122 DecodeStatus S = MCDisassembler::Success;
3124 switch (Inst.getOpcode()) {
3130 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3131 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3132 return MCDisassembler::Fail;
3136 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3138 switch (Inst.getOpcode()) {
3140 Inst.setOpcode(ARM::t2LDRBpci);
3143 Inst.setOpcode(ARM::t2LDRHpci);
3146 Inst.setOpcode(ARM::t2LDRSHpci);
3149 Inst.setOpcode(ARM::t2LDRSBpci);
3152 Inst.setOpcode(ARM::t2PLDi12);
3153 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3156 return MCDisassembler::Fail;
3159 int imm = fieldFromInstruction(Insn, 0, 12);
3160 if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
3161 Inst.addOperand(MCOperand::CreateImm(imm));
3166 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3167 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3168 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3169 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3170 return MCDisassembler::Fail;
3175 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3176 uint64_t Address, const void *Decoder) {
3178 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3180 int imm = Val & 0xFF;
3182 if (!(Val & 0x100)) imm *= -1;
3183 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3186 return MCDisassembler::Success;
3189 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3190 uint64_t Address, const void *Decoder) {
3191 DecodeStatus S = MCDisassembler::Success;
3193 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3194 unsigned imm = fieldFromInstruction(Val, 0, 9);
3196 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3197 return MCDisassembler::Fail;
3198 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3199 return MCDisassembler::Fail;
3204 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3205 uint64_t Address, const void *Decoder) {
3206 DecodeStatus S = MCDisassembler::Success;
3208 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3209 unsigned imm = fieldFromInstruction(Val, 0, 8);
3211 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3212 return MCDisassembler::Fail;
3214 Inst.addOperand(MCOperand::CreateImm(imm));
3219 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3220 uint64_t Address, const void *Decoder) {
3221 int imm = Val & 0xFF;
3224 else if (!(Val & 0x100))
3226 Inst.addOperand(MCOperand::CreateImm(imm));
3228 return MCDisassembler::Success;
3232 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3233 uint64_t Address, const void *Decoder) {
3234 DecodeStatus S = MCDisassembler::Success;
3236 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3237 unsigned imm = fieldFromInstruction(Val, 0, 9);
3239 // Some instructions always use an additive offset.
3240 switch (Inst.getOpcode()) {
3255 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3256 return MCDisassembler::Fail;
3257 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3258 return MCDisassembler::Fail;
3263 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3264 uint64_t Address, const void *Decoder) {
3265 DecodeStatus S = MCDisassembler::Success;
3267 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3268 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3269 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3270 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3272 unsigned load = fieldFromInstruction(Insn, 20, 1);
3275 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3276 return MCDisassembler::Fail;
3279 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3280 return MCDisassembler::Fail;
3283 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3284 return MCDisassembler::Fail;
3287 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3288 return MCDisassembler::Fail;
3293 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3294 uint64_t Address, const void *Decoder) {
3295 DecodeStatus S = MCDisassembler::Success;
3297 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3298 unsigned imm = fieldFromInstruction(Val, 0, 12);
3300 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3301 return MCDisassembler::Fail;
3302 Inst.addOperand(MCOperand::CreateImm(imm));
3308 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3309 uint64_t Address, const void *Decoder) {
3310 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3312 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3313 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3314 Inst.addOperand(MCOperand::CreateImm(imm));
3316 return MCDisassembler::Success;
3319 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3320 uint64_t Address, const void *Decoder) {
3321 DecodeStatus S = MCDisassembler::Success;
3323 if (Inst.getOpcode() == ARM::tADDrSP) {
3324 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3325 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3327 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3328 return MCDisassembler::Fail;
3329 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3330 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3331 return MCDisassembler::Fail;
3332 } else if (Inst.getOpcode() == ARM::tADDspr) {
3333 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3335 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3336 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3337 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3338 return MCDisassembler::Fail;
3344 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3345 uint64_t Address, const void *Decoder) {
3346 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3347 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3349 Inst.addOperand(MCOperand::CreateImm(imod));
3350 Inst.addOperand(MCOperand::CreateImm(flags));
3352 return MCDisassembler::Success;
3355 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3356 uint64_t Address, const void *Decoder) {
3357 DecodeStatus S = MCDisassembler::Success;
3358 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3359 unsigned add = fieldFromInstruction(Insn, 4, 1);
3361 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3362 return MCDisassembler::Fail;
3363 Inst.addOperand(MCOperand::CreateImm(add));
3368 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3369 uint64_t Address, const void *Decoder) {
3370 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3371 // Note only one trailing zero not two. Also the J1 and J2 values are from
3372 // the encoded instruction. So here change to I1 and I2 values via:
3373 // I1 = NOT(J1 EOR S);
3374 // I2 = NOT(J2 EOR S);
3375 // and build the imm32 with two trailing zeros as documented:
3376 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3377 unsigned S = (Val >> 23) & 1;
3378 unsigned J1 = (Val >> 22) & 1;
3379 unsigned J2 = (Val >> 21) & 1;
3380 unsigned I1 = !(J1 ^ S);
3381 unsigned I2 = !(J2 ^ S);
3382 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3383 int imm32 = SignExtend32<25>(tmp << 1);
3385 if (!tryAddingSymbolicOperand(Address,
3386 (Address & ~2u) + imm32 + 4,
3387 true, 4, Inst, Decoder))
3388 Inst.addOperand(MCOperand::CreateImm(imm32));
3389 return MCDisassembler::Success;
3392 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3393 uint64_t Address, const void *Decoder) {
3394 if (Val == 0xA || Val == 0xB)
3395 return MCDisassembler::Fail;
3397 Inst.addOperand(MCOperand::CreateImm(Val));
3398 return MCDisassembler::Success;
3402 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3403 uint64_t Address, const void *Decoder) {
3404 DecodeStatus S = MCDisassembler::Success;
3406 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3407 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3409 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3410 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3411 return MCDisassembler::Fail;
3412 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3413 return MCDisassembler::Fail;
3418 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3419 uint64_t Address, const void *Decoder) {
3420 DecodeStatus S = MCDisassembler::Success;
3422 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3423 if (pred == 0xE || pred == 0xF) {
3424 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3427 return MCDisassembler::Fail;
3429 Inst.setOpcode(ARM::t2DSB);
3432 Inst.setOpcode(ARM::t2DMB);
3435 Inst.setOpcode(ARM::t2ISB);
3439 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3440 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3443 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3444 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3445 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3446 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3447 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3449 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3450 return MCDisassembler::Fail;
3451 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3452 return MCDisassembler::Fail;
3457 // Decode a shifted immediate operand. These basically consist
3458 // of an 8-bit value, and a 4-bit directive that specifies either
3459 // a splat operation or a rotation.
3460 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3461 uint64_t Address, const void *Decoder) {
3462 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3464 unsigned byte = fieldFromInstruction(Val, 8, 2);
3465 unsigned imm = fieldFromInstruction(Val, 0, 8);
3468 Inst.addOperand(MCOperand::CreateImm(imm));
3471 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3474 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3477 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3482 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3483 unsigned rot = fieldFromInstruction(Val, 7, 5);
3484 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3485 Inst.addOperand(MCOperand::CreateImm(imm));
3488 return MCDisassembler::Success;
3492 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3493 uint64_t Address, const void *Decoder){
3494 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3495 true, 2, Inst, Decoder))
3496 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3497 return MCDisassembler::Success;
3500 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3501 uint64_t Address, const void *Decoder){
3502 // Val is passed in as S:J1:J2:imm10:imm11
3503 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3504 // the encoded instruction. So here change to I1 and I2 values via:
3505 // I1 = NOT(J1 EOR S);
3506 // I2 = NOT(J2 EOR S);
3507 // and build the imm32 with one trailing zero as documented:
3508 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3509 unsigned S = (Val >> 23) & 1;
3510 unsigned J1 = (Val >> 22) & 1;
3511 unsigned J2 = (Val >> 21) & 1;
3512 unsigned I1 = !(J1 ^ S);
3513 unsigned I2 = !(J2 ^ S);
3514 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3515 int imm32 = SignExtend32<25>(tmp << 1);
3517 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3518 true, 4, Inst, Decoder))
3519 Inst.addOperand(MCOperand::CreateImm(imm32));
3520 return MCDisassembler::Success;
3523 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3524 uint64_t Address, const void *Decoder) {
3526 return MCDisassembler::Fail;
3528 Inst.addOperand(MCOperand::CreateImm(Val));
3529 return MCDisassembler::Success;
3532 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3533 uint64_t Address, const void *Decoder) {
3534 if (!Val) return MCDisassembler::Fail;
3535 Inst.addOperand(MCOperand::CreateImm(Val));
3536 return MCDisassembler::Success;
3539 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3540 uint64_t Address, const void *Decoder) {
3541 DecodeStatus S = MCDisassembler::Success;
3543 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3544 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3545 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3547 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3549 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3550 return MCDisassembler::Fail;
3551 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3552 return MCDisassembler::Fail;
3553 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3554 return MCDisassembler::Fail;
3555 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3556 return MCDisassembler::Fail;
3562 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3563 uint64_t Address, const void *Decoder){
3564 DecodeStatus S = MCDisassembler::Success;
3566 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3567 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3568 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3569 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3571 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3572 return MCDisassembler::Fail;
3574 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3575 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3577 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3578 return MCDisassembler::Fail;
3579 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3580 return MCDisassembler::Fail;
3581 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3582 return MCDisassembler::Fail;
3583 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3584 return MCDisassembler::Fail;
3589 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3590 uint64_t Address, const void *Decoder) {
3591 DecodeStatus S = MCDisassembler::Success;
3593 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3594 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3595 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3596 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3597 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3598 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3600 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3602 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3603 return MCDisassembler::Fail;
3604 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3605 return MCDisassembler::Fail;
3606 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3607 return MCDisassembler::Fail;
3608 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3609 return MCDisassembler::Fail;
3614 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3615 uint64_t Address, const void *Decoder) {
3616 DecodeStatus S = MCDisassembler::Success;
3618 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3619 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3620 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3621 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3622 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3623 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3624 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3626 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3627 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3629 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3630 return MCDisassembler::Fail;
3631 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3632 return MCDisassembler::Fail;
3633 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3634 return MCDisassembler::Fail;
3635 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3636 return MCDisassembler::Fail;
3642 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3643 uint64_t Address, const void *Decoder) {
3644 DecodeStatus S = MCDisassembler::Success;
3646 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3647 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3648 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3649 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3650 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3651 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3653 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3655 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3656 return MCDisassembler::Fail;
3657 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3658 return MCDisassembler::Fail;
3659 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3660 return MCDisassembler::Fail;
3661 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3662 return MCDisassembler::Fail;
3667 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3668 uint64_t Address, const void *Decoder) {
3669 DecodeStatus S = MCDisassembler::Success;
3671 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3672 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3673 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3674 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3675 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3676 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3678 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3680 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3681 return MCDisassembler::Fail;
3682 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3683 return MCDisassembler::Fail;
3684 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3685 return MCDisassembler::Fail;
3686 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3687 return MCDisassembler::Fail;
3692 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3693 uint64_t Address, const void *Decoder) {
3694 DecodeStatus S = MCDisassembler::Success;
3696 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3697 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3698 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3699 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3700 unsigned size = fieldFromInstruction(Insn, 10, 2);
3706 return MCDisassembler::Fail;
3708 if (fieldFromInstruction(Insn, 4, 1))
3709 return MCDisassembler::Fail; // UNDEFINED
3710 index = fieldFromInstruction(Insn, 5, 3);
3713 if (fieldFromInstruction(Insn, 5, 1))
3714 return MCDisassembler::Fail; // UNDEFINED
3715 index = fieldFromInstruction(Insn, 6, 2);
3716 if (fieldFromInstruction(Insn, 4, 1))
3720 if (fieldFromInstruction(Insn, 6, 1))
3721 return MCDisassembler::Fail; // UNDEFINED
3722 index = fieldFromInstruction(Insn, 7, 1);
3724 switch (fieldFromInstruction(Insn, 4, 2)) {
3730 return MCDisassembler::Fail;
3735 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3736 return MCDisassembler::Fail;
3737 if (Rm != 0xF) { // Writeback
3738 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3739 return MCDisassembler::Fail;
3741 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3742 return MCDisassembler::Fail;
3743 Inst.addOperand(MCOperand::CreateImm(align));
3746 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3747 return MCDisassembler::Fail;
3749 Inst.addOperand(MCOperand::CreateReg(0));
3752 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3753 return MCDisassembler::Fail;
3754 Inst.addOperand(MCOperand::CreateImm(index));
3759 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3760 uint64_t Address, const void *Decoder) {
3761 DecodeStatus S = MCDisassembler::Success;
3763 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3764 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3765 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3766 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3767 unsigned size = fieldFromInstruction(Insn, 10, 2);
3773 return MCDisassembler::Fail;
3775 if (fieldFromInstruction(Insn, 4, 1))
3776 return MCDisassembler::Fail; // UNDEFINED
3777 index = fieldFromInstruction(Insn, 5, 3);
3780 if (fieldFromInstruction(Insn, 5, 1))
3781 return MCDisassembler::Fail; // UNDEFINED
3782 index = fieldFromInstruction(Insn, 6, 2);
3783 if (fieldFromInstruction(Insn, 4, 1))
3787 if (fieldFromInstruction(Insn, 6, 1))
3788 return MCDisassembler::Fail; // UNDEFINED
3789 index = fieldFromInstruction(Insn, 7, 1);
3791 switch (fieldFromInstruction(Insn, 4, 2)) {
3797 return MCDisassembler::Fail;
3802 if (Rm != 0xF) { // Writeback
3803 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3804 return MCDisassembler::Fail;
3806 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3807 return MCDisassembler::Fail;
3808 Inst.addOperand(MCOperand::CreateImm(align));
3811 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3812 return MCDisassembler::Fail;
3814 Inst.addOperand(MCOperand::CreateReg(0));
3817 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3818 return MCDisassembler::Fail;
3819 Inst.addOperand(MCOperand::CreateImm(index));
3825 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3826 uint64_t Address, const void *Decoder) {
3827 DecodeStatus S = MCDisassembler::Success;
3829 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3830 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3831 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3832 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3833 unsigned size = fieldFromInstruction(Insn, 10, 2);
3840 return MCDisassembler::Fail;
3842 index = fieldFromInstruction(Insn, 5, 3);
3843 if (fieldFromInstruction(Insn, 4, 1))
3847 index = fieldFromInstruction(Insn, 6, 2);
3848 if (fieldFromInstruction(Insn, 4, 1))
3850 if (fieldFromInstruction(Insn, 5, 1))
3854 if (fieldFromInstruction(Insn, 5, 1))
3855 return MCDisassembler::Fail; // UNDEFINED
3856 index = fieldFromInstruction(Insn, 7, 1);
3857 if (fieldFromInstruction(Insn, 4, 1) != 0)
3859 if (fieldFromInstruction(Insn, 6, 1))
3864 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3865 return MCDisassembler::Fail;
3866 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3867 return MCDisassembler::Fail;
3868 if (Rm != 0xF) { // Writeback
3869 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3870 return MCDisassembler::Fail;
3872 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3873 return MCDisassembler::Fail;
3874 Inst.addOperand(MCOperand::CreateImm(align));
3877 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3878 return MCDisassembler::Fail;
3880 Inst.addOperand(MCOperand::CreateReg(0));
3883 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3884 return MCDisassembler::Fail;
3885 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3886 return MCDisassembler::Fail;
3887 Inst.addOperand(MCOperand::CreateImm(index));
3892 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3893 uint64_t Address, const void *Decoder) {
3894 DecodeStatus S = MCDisassembler::Success;
3896 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3897 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3898 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3899 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3900 unsigned size = fieldFromInstruction(Insn, 10, 2);
3907 return MCDisassembler::Fail;
3909 index = fieldFromInstruction(Insn, 5, 3);
3910 if (fieldFromInstruction(Insn, 4, 1))
3914 index = fieldFromInstruction(Insn, 6, 2);
3915 if (fieldFromInstruction(Insn, 4, 1))
3917 if (fieldFromInstruction(Insn, 5, 1))
3921 if (fieldFromInstruction(Insn, 5, 1))
3922 return MCDisassembler::Fail; // UNDEFINED
3923 index = fieldFromInstruction(Insn, 7, 1);
3924 if (fieldFromInstruction(Insn, 4, 1) != 0)
3926 if (fieldFromInstruction(Insn, 6, 1))
3931 if (Rm != 0xF) { // Writeback
3932 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3933 return MCDisassembler::Fail;
3935 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3936 return MCDisassembler::Fail;
3937 Inst.addOperand(MCOperand::CreateImm(align));
3940 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3941 return MCDisassembler::Fail;
3943 Inst.addOperand(MCOperand::CreateReg(0));
3946 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3947 return MCDisassembler::Fail;
3948 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3949 return MCDisassembler::Fail;
3950 Inst.addOperand(MCOperand::CreateImm(index));
3956 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3957 uint64_t Address, const void *Decoder) {
3958 DecodeStatus S = MCDisassembler::Success;
3960 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3961 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3962 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3963 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3964 unsigned size = fieldFromInstruction(Insn, 10, 2);
3971 return MCDisassembler::Fail;
3973 if (fieldFromInstruction(Insn, 4, 1))
3974 return MCDisassembler::Fail; // UNDEFINED
3975 index = fieldFromInstruction(Insn, 5, 3);
3978 if (fieldFromInstruction(Insn, 4, 1))
3979 return MCDisassembler::Fail; // UNDEFINED
3980 index = fieldFromInstruction(Insn, 6, 2);
3981 if (fieldFromInstruction(Insn, 5, 1))
3985 if (fieldFromInstruction(Insn, 4, 2))
3986 return MCDisassembler::Fail; // UNDEFINED
3987 index = fieldFromInstruction(Insn, 7, 1);
3988 if (fieldFromInstruction(Insn, 6, 1))
3993 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3994 return MCDisassembler::Fail;
3995 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3996 return MCDisassembler::Fail;
3997 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3998 return MCDisassembler::Fail;
4000 if (Rm != 0xF) { // Writeback
4001 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4002 return MCDisassembler::Fail;
4004 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4005 return MCDisassembler::Fail;
4006 Inst.addOperand(MCOperand::CreateImm(align));
4009 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4010 return MCDisassembler::Fail;
4012 Inst.addOperand(MCOperand::CreateReg(0));
4015 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4016 return MCDisassembler::Fail;
4017 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4018 return MCDisassembler::Fail;
4019 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4020 return MCDisassembler::Fail;
4021 Inst.addOperand(MCOperand::CreateImm(index));
4026 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4027 uint64_t Address, const void *Decoder) {
4028 DecodeStatus S = MCDisassembler::Success;
4030 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4031 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4032 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4033 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4034 unsigned size = fieldFromInstruction(Insn, 10, 2);
4041 return MCDisassembler::Fail;
4043 if (fieldFromInstruction(Insn, 4, 1))
4044 return MCDisassembler::Fail; // UNDEFINED
4045 index = fieldFromInstruction(Insn, 5, 3);
4048 if (fieldFromInstruction(Insn, 4, 1))
4049 return MCDisassembler::Fail; // UNDEFINED
4050 index = fieldFromInstruction(Insn, 6, 2);
4051 if (fieldFromInstruction(Insn, 5, 1))
4055 if (fieldFromInstruction(Insn, 4, 2))
4056 return MCDisassembler::Fail; // UNDEFINED
4057 index = fieldFromInstruction(Insn, 7, 1);
4058 if (fieldFromInstruction(Insn, 6, 1))
4063 if (Rm != 0xF) { // Writeback
4064 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4065 return MCDisassembler::Fail;
4067 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4068 return MCDisassembler::Fail;
4069 Inst.addOperand(MCOperand::CreateImm(align));
4072 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4073 return MCDisassembler::Fail;
4075 Inst.addOperand(MCOperand::CreateReg(0));
4078 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4079 return MCDisassembler::Fail;
4080 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4081 return MCDisassembler::Fail;
4082 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4083 return MCDisassembler::Fail;
4084 Inst.addOperand(MCOperand::CreateImm(index));
4090 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4091 uint64_t Address, const void *Decoder) {
4092 DecodeStatus S = MCDisassembler::Success;
4094 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4095 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4096 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4097 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4098 unsigned size = fieldFromInstruction(Insn, 10, 2);
4105 return MCDisassembler::Fail;
4107 if (fieldFromInstruction(Insn, 4, 1))
4109 index = fieldFromInstruction(Insn, 5, 3);
4112 if (fieldFromInstruction(Insn, 4, 1))
4114 index = fieldFromInstruction(Insn, 6, 2);
4115 if (fieldFromInstruction(Insn, 5, 1))
4119 switch (fieldFromInstruction(Insn, 4, 2)) {
4123 return MCDisassembler::Fail;
4125 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4128 index = fieldFromInstruction(Insn, 7, 1);
4129 if (fieldFromInstruction(Insn, 6, 1))
4134 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4135 return MCDisassembler::Fail;
4136 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4137 return MCDisassembler::Fail;
4138 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4139 return MCDisassembler::Fail;
4140 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4141 return MCDisassembler::Fail;
4143 if (Rm != 0xF) { // Writeback
4144 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4145 return MCDisassembler::Fail;
4147 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4148 return MCDisassembler::Fail;
4149 Inst.addOperand(MCOperand::CreateImm(align));
4152 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4153 return MCDisassembler::Fail;
4155 Inst.addOperand(MCOperand::CreateReg(0));
4158 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4159 return MCDisassembler::Fail;
4160 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4161 return MCDisassembler::Fail;
4162 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4163 return MCDisassembler::Fail;
4164 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4165 return MCDisassembler::Fail;
4166 Inst.addOperand(MCOperand::CreateImm(index));
4171 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4172 uint64_t Address, const void *Decoder) {
4173 DecodeStatus S = MCDisassembler::Success;
4175 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4176 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4177 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4178 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4179 unsigned size = fieldFromInstruction(Insn, 10, 2);
4186 return MCDisassembler::Fail;
4188 if (fieldFromInstruction(Insn, 4, 1))
4190 index = fieldFromInstruction(Insn, 5, 3);
4193 if (fieldFromInstruction(Insn, 4, 1))
4195 index = fieldFromInstruction(Insn, 6, 2);
4196 if (fieldFromInstruction(Insn, 5, 1))
4200 switch (fieldFromInstruction(Insn, 4, 2)) {
4204 return MCDisassembler::Fail;
4206 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4209 index = fieldFromInstruction(Insn, 7, 1);
4210 if (fieldFromInstruction(Insn, 6, 1))
4215 if (Rm != 0xF) { // Writeback
4216 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4217 return MCDisassembler::Fail;
4219 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4220 return MCDisassembler::Fail;
4221 Inst.addOperand(MCOperand::CreateImm(align));
4224 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4225 return MCDisassembler::Fail;
4227 Inst.addOperand(MCOperand::CreateReg(0));
4230 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4231 return MCDisassembler::Fail;
4232 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4233 return MCDisassembler::Fail;
4234 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4235 return MCDisassembler::Fail;
4236 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4237 return MCDisassembler::Fail;
4238 Inst.addOperand(MCOperand::CreateImm(index));
4243 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4244 uint64_t Address, const void *Decoder) {
4245 DecodeStatus S = MCDisassembler::Success;
4246 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4247 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4248 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4249 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4250 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4252 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4253 S = MCDisassembler::SoftFail;
4255 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4256 return MCDisassembler::Fail;
4257 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4258 return MCDisassembler::Fail;
4259 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4260 return MCDisassembler::Fail;
4261 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4262 return MCDisassembler::Fail;
4263 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4264 return MCDisassembler::Fail;
4269 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4270 uint64_t Address, const void *Decoder) {
4271 DecodeStatus S = MCDisassembler::Success;
4272 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4273 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4274 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4275 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4276 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4278 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4279 S = MCDisassembler::SoftFail;
4281 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4282 return MCDisassembler::Fail;
4283 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4284 return MCDisassembler::Fail;
4285 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4286 return MCDisassembler::Fail;
4287 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4288 return MCDisassembler::Fail;
4289 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4290 return MCDisassembler::Fail;
4295 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4296 uint64_t Address, const void *Decoder) {
4297 DecodeStatus S = MCDisassembler::Success;
4298 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4299 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4303 S = MCDisassembler::SoftFail;
4308 S = MCDisassembler::SoftFail;
4311 Inst.addOperand(MCOperand::CreateImm(pred));
4312 Inst.addOperand(MCOperand::CreateImm(mask));
4317 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4318 uint64_t Address, const void *Decoder) {
4319 DecodeStatus S = MCDisassembler::Success;
4321 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4322 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4323 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4324 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4325 unsigned W = fieldFromInstruction(Insn, 21, 1);
4326 unsigned U = fieldFromInstruction(Insn, 23, 1);
4327 unsigned P = fieldFromInstruction(Insn, 24, 1);
4328 bool writeback = (W == 1) | (P == 0);
4330 addr |= (U << 8) | (Rn << 9);
4332 if (writeback && (Rn == Rt || Rn == Rt2))
4333 Check(S, MCDisassembler::SoftFail);
4335 Check(S, MCDisassembler::SoftFail);
4338 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4339 return MCDisassembler::Fail;
4341 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4342 return MCDisassembler::Fail;
4343 // Writeback operand
4344 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4345 return MCDisassembler::Fail;
4347 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4348 return MCDisassembler::Fail;
4354 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4355 uint64_t Address, const void *Decoder) {
4356 DecodeStatus S = MCDisassembler::Success;
4358 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4359 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4360 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4361 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4362 unsigned W = fieldFromInstruction(Insn, 21, 1);
4363 unsigned U = fieldFromInstruction(Insn, 23, 1);
4364 unsigned P = fieldFromInstruction(Insn, 24, 1);
4365 bool writeback = (W == 1) | (P == 0);
4367 addr |= (U << 8) | (Rn << 9);
4369 if (writeback && (Rn == Rt || Rn == Rt2))
4370 Check(S, MCDisassembler::SoftFail);
4372 // Writeback operand
4373 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4374 return MCDisassembler::Fail;
4376 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4377 return MCDisassembler::Fail;
4379 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4380 return MCDisassembler::Fail;
4382 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4383 return MCDisassembler::Fail;
4388 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4389 uint64_t Address, const void *Decoder) {
4390 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4391 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4392 if (sign1 != sign2) return MCDisassembler::Fail;
4394 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4395 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4396 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4398 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4400 return MCDisassembler::Success;
4403 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4405 const void *Decoder) {
4406 DecodeStatus S = MCDisassembler::Success;
4408 // Shift of "asr #32" is not allowed in Thumb2 mode.
4409 if (Val == 0x20) S = MCDisassembler::SoftFail;
4410 Inst.addOperand(MCOperand::CreateImm(Val));
4414 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4415 uint64_t Address, const void *Decoder) {
4416 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4417 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4418 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4419 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4422 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4424 DecodeStatus S = MCDisassembler::Success;
4426 if (Rt == Rn || Rn == Rt2)
4427 S = MCDisassembler::SoftFail;
4429 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4430 return MCDisassembler::Fail;
4431 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4432 return MCDisassembler::Fail;
4433 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4434 return MCDisassembler::Fail;
4435 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4436 return MCDisassembler::Fail;
4441 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4442 uint64_t Address, const void *Decoder) {
4443 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4444 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4445 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4446 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4447 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4448 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4450 DecodeStatus S = MCDisassembler::Success;
4452 // VMOVv2f32 is ambiguous with these decodings.
4453 if (!(imm & 0x38) && cmode == 0xF) {
4454 Inst.setOpcode(ARM::VMOVv2f32);
4455 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4458 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4460 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4461 return MCDisassembler::Fail;
4462 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4463 return MCDisassembler::Fail;
4464 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4469 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4470 uint64_t Address, const void *Decoder) {
4471 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4472 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4473 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4474 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4475 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4476 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4478 DecodeStatus S = MCDisassembler::Success;
4480 // VMOVv4f32 is ambiguous with these decodings.
4481 if (!(imm & 0x38) && cmode == 0xF) {
4482 Inst.setOpcode(ARM::VMOVv4f32);
4483 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4486 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4488 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4489 return MCDisassembler::Fail;
4490 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4491 return MCDisassembler::Fail;
4492 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4497 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4498 uint64_t Address, const void *Decoder) {
4499 DecodeStatus S = MCDisassembler::Success;
4501 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4502 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4503 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4504 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4505 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4507 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4508 S = MCDisassembler::SoftFail;
4510 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4511 return MCDisassembler::Fail;
4512 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4513 return MCDisassembler::Fail;
4514 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4515 return MCDisassembler::Fail;
4516 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4517 return MCDisassembler::Fail;
4518 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4519 return MCDisassembler::Fail;
4524 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4525 uint64_t Address, const void *Decoder) {
4527 DecodeStatus S = MCDisassembler::Success;
4529 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4530 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4531 unsigned cop = fieldFromInstruction(Val, 8, 4);
4532 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4533 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4535 if ((cop & ~0x1) == 0xa)
4536 return MCDisassembler::Fail;
4539 S = MCDisassembler::SoftFail;
4541 Inst.addOperand(MCOperand::CreateImm(cop));
4542 Inst.addOperand(MCOperand::CreateImm(opc1));
4543 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4544 return MCDisassembler::Fail;
4545 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4546 return MCDisassembler::Fail;
4547 Inst.addOperand(MCOperand::CreateImm(CRm));