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 "ARMGenInstrInfo.inc"
389 #include "ARMGenEDInfo.inc"
391 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
392 return new ARMDisassembler(STI);
395 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
396 return new ThumbDisassembler(STI);
399 const EDInstInfo *ARMDisassembler::getEDInfo() const {
403 const EDInstInfo *ThumbDisassembler::getEDInfo() const {
407 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
408 const MemoryObject &Region,
411 raw_ostream &cs) const {
416 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
417 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
419 // We want to read exactly 4 bytes of data.
420 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
422 return MCDisassembler::Fail;
425 // Encoded as a small-endian 32-bit word in the stream.
426 uint32_t insn = (bytes[3] << 24) |
431 // Calling the auto-generated decoder function.
432 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
434 if (result != MCDisassembler::Fail) {
439 // VFP and NEON instructions, similarly, are shared between ARM
442 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
443 if (result != MCDisassembler::Fail) {
449 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
451 if (result != MCDisassembler::Fail) {
453 // Add a fake predicate operand, because we share these instruction
454 // definitions with Thumb2 where these instructions are predicable.
455 if (!DecodePredicateOperand(MI, 0xE, Address, this))
456 return MCDisassembler::Fail;
461 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
463 if (result != MCDisassembler::Fail) {
465 // Add a fake predicate operand, because we share these instruction
466 // definitions with Thumb2 where these instructions are predicable.
467 if (!DecodePredicateOperand(MI, 0xE, Address, this))
468 return MCDisassembler::Fail;
473 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
475 if (result != MCDisassembler::Fail) {
477 // Add a fake predicate operand, because we share these instruction
478 // definitions with Thumb2 where these instructions are predicable.
479 if (!DecodePredicateOperand(MI, 0xE, Address, this))
480 return MCDisassembler::Fail;
487 return MCDisassembler::Fail;
491 extern const MCInstrDesc ARMInsts[];
494 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
495 /// immediate Value in the MCInst. The immediate Value has had any PC
496 /// adjustment made by the caller. If the instruction is a branch instruction
497 /// then isBranch is true, else false. If the getOpInfo() function was set as
498 /// part of the setupForSymbolicDisassembly() call then that function is called
499 /// to get any symbolic information at the Address for this instruction. If
500 /// that returns non-zero then the symbolic information it returns is used to
501 /// create an MCExpr and that is added as an operand to the MCInst. If
502 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
503 /// Value is done and if a symbol is found an MCExpr is created with that, else
504 /// an MCExpr with Value is created. This function returns true if it adds an
505 /// operand to the MCInst and false otherwise.
506 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
507 bool isBranch, uint64_t InstSize,
508 MCInst &MI, const void *Decoder) {
509 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
510 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
511 struct LLVMOpInfo1 SymbolicOp;
512 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
513 SymbolicOp.Value = Value;
514 void *DisInfo = Dis->getDisInfoBlock();
517 !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
518 // Clear SymbolicOp.Value from above and also all other fields.
519 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
520 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
523 uint64_t ReferenceType;
525 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
527 ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
528 const char *ReferenceName;
529 const char *Name = SymbolLookUp(DisInfo, Value, &ReferenceType, Address,
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 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1529 Inst.addOperand(MCOperand::CreateImm(imm));
1531 Inst.addOperand(MCOperand::CreateReg(0));
1532 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1533 Inst.addOperand(MCOperand::CreateImm(tmp));
1536 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1537 return MCDisassembler::Fail;
1542 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1543 uint64_t Address, const void *Decoder) {
1544 DecodeStatus S = MCDisassembler::Success;
1546 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1547 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1548 unsigned type = fieldFromInstruction(Val, 5, 2);
1549 unsigned imm = fieldFromInstruction(Val, 7, 5);
1550 unsigned U = fieldFromInstruction(Val, 12, 1);
1552 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1568 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1569 return MCDisassembler::Fail;
1570 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1571 return MCDisassembler::Fail;
1574 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1576 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1577 Inst.addOperand(MCOperand::CreateImm(shift));
1583 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1584 uint64_t Address, const void *Decoder) {
1585 DecodeStatus S = MCDisassembler::Success;
1587 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1588 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1589 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1590 unsigned type = fieldFromInstruction(Insn, 22, 1);
1591 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1592 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1593 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1594 unsigned W = fieldFromInstruction(Insn, 21, 1);
1595 unsigned P = fieldFromInstruction(Insn, 24, 1);
1596 unsigned Rt2 = Rt + 1;
1598 bool writeback = (W == 1) | (P == 0);
1600 // For {LD,ST}RD, Rt must be even, else undefined.
1601 switch (Inst.getOpcode()) {
1604 case ARM::STRD_POST:
1607 case ARM::LDRD_POST:
1608 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1613 switch (Inst.getOpcode()) {
1616 case ARM::STRD_POST:
1617 if (P == 0 && W == 1)
1618 S = MCDisassembler::SoftFail;
1620 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1621 S = MCDisassembler::SoftFail;
1622 if (type && Rm == 15)
1623 S = MCDisassembler::SoftFail;
1625 S = MCDisassembler::SoftFail;
1626 if (!type && fieldFromInstruction(Insn, 8, 4))
1627 S = MCDisassembler::SoftFail;
1631 case ARM::STRH_POST:
1633 S = MCDisassembler::SoftFail;
1634 if (writeback && (Rn == 15 || Rn == Rt))
1635 S = MCDisassembler::SoftFail;
1636 if (!type && Rm == 15)
1637 S = MCDisassembler::SoftFail;
1641 case ARM::LDRD_POST:
1642 if (type && Rn == 15){
1644 S = MCDisassembler::SoftFail;
1647 if (P == 0 && W == 1)
1648 S = MCDisassembler::SoftFail;
1649 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1650 S = MCDisassembler::SoftFail;
1651 if (!type && writeback && Rn == 15)
1652 S = MCDisassembler::SoftFail;
1653 if (writeback && (Rn == Rt || Rn == Rt2))
1654 S = MCDisassembler::SoftFail;
1658 case ARM::LDRH_POST:
1659 if (type && Rn == 15){
1661 S = MCDisassembler::SoftFail;
1665 S = MCDisassembler::SoftFail;
1666 if (!type && Rm == 15)
1667 S = MCDisassembler::SoftFail;
1668 if (!type && writeback && (Rn == 15 || Rn == Rt))
1669 S = MCDisassembler::SoftFail;
1672 case ARM::LDRSH_PRE:
1673 case ARM::LDRSH_POST:
1675 case ARM::LDRSB_PRE:
1676 case ARM::LDRSB_POST:
1677 if (type && Rn == 15){
1679 S = MCDisassembler::SoftFail;
1682 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1683 S = MCDisassembler::SoftFail;
1684 if (!type && (Rt == 15 || Rm == 15))
1685 S = MCDisassembler::SoftFail;
1686 if (!type && writeback && (Rn == 15 || Rn == Rt))
1687 S = MCDisassembler::SoftFail;
1693 if (writeback) { // Writeback
1695 U |= ARMII::IndexModePre << 9;
1697 U |= ARMII::IndexModePost << 9;
1699 // On stores, the writeback operand precedes Rt.
1700 switch (Inst.getOpcode()) {
1703 case ARM::STRD_POST:
1706 case ARM::STRH_POST:
1707 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1708 return MCDisassembler::Fail;
1715 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1716 return MCDisassembler::Fail;
1717 switch (Inst.getOpcode()) {
1720 case ARM::STRD_POST:
1723 case ARM::LDRD_POST:
1724 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1725 return MCDisassembler::Fail;
1732 // On loads, the writeback operand comes after Rt.
1733 switch (Inst.getOpcode()) {
1736 case ARM::LDRD_POST:
1739 case ARM::LDRH_POST:
1741 case ARM::LDRSH_PRE:
1742 case ARM::LDRSH_POST:
1744 case ARM::LDRSB_PRE:
1745 case ARM::LDRSB_POST:
1748 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1749 return MCDisassembler::Fail;
1756 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1757 return MCDisassembler::Fail;
1760 Inst.addOperand(MCOperand::CreateReg(0));
1761 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1763 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1764 return MCDisassembler::Fail;
1765 Inst.addOperand(MCOperand::CreateImm(U));
1768 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1769 return MCDisassembler::Fail;
1774 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1775 uint64_t Address, const void *Decoder) {
1776 DecodeStatus S = MCDisassembler::Success;
1778 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1779 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1796 Inst.addOperand(MCOperand::CreateImm(mode));
1797 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1798 return MCDisassembler::Fail;
1803 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1805 uint64_t Address, const void *Decoder) {
1806 DecodeStatus S = MCDisassembler::Success;
1808 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1809 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1810 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1813 switch (Inst.getOpcode()) {
1815 Inst.setOpcode(ARM::RFEDA);
1817 case ARM::LDMDA_UPD:
1818 Inst.setOpcode(ARM::RFEDA_UPD);
1821 Inst.setOpcode(ARM::RFEDB);
1823 case ARM::LDMDB_UPD:
1824 Inst.setOpcode(ARM::RFEDB_UPD);
1827 Inst.setOpcode(ARM::RFEIA);
1829 case ARM::LDMIA_UPD:
1830 Inst.setOpcode(ARM::RFEIA_UPD);
1833 Inst.setOpcode(ARM::RFEIB);
1835 case ARM::LDMIB_UPD:
1836 Inst.setOpcode(ARM::RFEIB_UPD);
1839 Inst.setOpcode(ARM::SRSDA);
1841 case ARM::STMDA_UPD:
1842 Inst.setOpcode(ARM::SRSDA_UPD);
1845 Inst.setOpcode(ARM::SRSDB);
1847 case ARM::STMDB_UPD:
1848 Inst.setOpcode(ARM::SRSDB_UPD);
1851 Inst.setOpcode(ARM::SRSIA);
1853 case ARM::STMIA_UPD:
1854 Inst.setOpcode(ARM::SRSIA_UPD);
1857 Inst.setOpcode(ARM::SRSIB);
1859 case ARM::STMIB_UPD:
1860 Inst.setOpcode(ARM::SRSIB_UPD);
1863 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1866 // For stores (which become SRS's, the only operand is the mode.
1867 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1869 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1873 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1876 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1877 return MCDisassembler::Fail;
1878 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1879 return MCDisassembler::Fail; // Tied
1880 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1881 return MCDisassembler::Fail;
1882 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1883 return MCDisassembler::Fail;
1888 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1889 uint64_t Address, const void *Decoder) {
1890 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1891 unsigned M = fieldFromInstruction(Insn, 17, 1);
1892 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1893 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1895 DecodeStatus S = MCDisassembler::Success;
1897 // imod == '01' --> UNPREDICTABLE
1898 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1899 // return failure here. The '01' imod value is unprintable, so there's
1900 // nothing useful we could do even if we returned UNPREDICTABLE.
1902 if (imod == 1) return MCDisassembler::Fail;
1905 Inst.setOpcode(ARM::CPS3p);
1906 Inst.addOperand(MCOperand::CreateImm(imod));
1907 Inst.addOperand(MCOperand::CreateImm(iflags));
1908 Inst.addOperand(MCOperand::CreateImm(mode));
1909 } else if (imod && !M) {
1910 Inst.setOpcode(ARM::CPS2p);
1911 Inst.addOperand(MCOperand::CreateImm(imod));
1912 Inst.addOperand(MCOperand::CreateImm(iflags));
1913 if (mode) S = MCDisassembler::SoftFail;
1914 } else if (!imod && M) {
1915 Inst.setOpcode(ARM::CPS1p);
1916 Inst.addOperand(MCOperand::CreateImm(mode));
1917 if (iflags) S = MCDisassembler::SoftFail;
1919 // imod == '00' && M == '0' --> UNPREDICTABLE
1920 Inst.setOpcode(ARM::CPS1p);
1921 Inst.addOperand(MCOperand::CreateImm(mode));
1922 S = MCDisassembler::SoftFail;
1928 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1929 uint64_t Address, const void *Decoder) {
1930 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1931 unsigned M = fieldFromInstruction(Insn, 8, 1);
1932 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1933 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1935 DecodeStatus S = MCDisassembler::Success;
1937 // imod == '01' --> UNPREDICTABLE
1938 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1939 // return failure here. The '01' imod value is unprintable, so there's
1940 // nothing useful we could do even if we returned UNPREDICTABLE.
1942 if (imod == 1) return MCDisassembler::Fail;
1945 Inst.setOpcode(ARM::t2CPS3p);
1946 Inst.addOperand(MCOperand::CreateImm(imod));
1947 Inst.addOperand(MCOperand::CreateImm(iflags));
1948 Inst.addOperand(MCOperand::CreateImm(mode));
1949 } else if (imod && !M) {
1950 Inst.setOpcode(ARM::t2CPS2p);
1951 Inst.addOperand(MCOperand::CreateImm(imod));
1952 Inst.addOperand(MCOperand::CreateImm(iflags));
1953 if (mode) S = MCDisassembler::SoftFail;
1954 } else if (!imod && M) {
1955 Inst.setOpcode(ARM::t2CPS1p);
1956 Inst.addOperand(MCOperand::CreateImm(mode));
1957 if (iflags) S = MCDisassembler::SoftFail;
1959 // imod == '00' && M == '0' --> UNPREDICTABLE
1960 Inst.setOpcode(ARM::t2CPS1p);
1961 Inst.addOperand(MCOperand::CreateImm(mode));
1962 S = MCDisassembler::SoftFail;
1968 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1969 uint64_t Address, const void *Decoder) {
1970 DecodeStatus S = MCDisassembler::Success;
1972 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
1975 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
1976 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
1977 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1978 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
1980 if (Inst.getOpcode() == ARM::t2MOVTi16)
1981 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1982 return MCDisassembler::Fail;
1983 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1984 return MCDisassembler::Fail;
1986 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1987 Inst.addOperand(MCOperand::CreateImm(imm));
1992 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1993 uint64_t Address, const void *Decoder) {
1994 DecodeStatus S = MCDisassembler::Success;
1996 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1997 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2000 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2001 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2003 if (Inst.getOpcode() == ARM::MOVTi16)
2004 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2005 return MCDisassembler::Fail;
2006 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2007 return MCDisassembler::Fail;
2009 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2010 Inst.addOperand(MCOperand::CreateImm(imm));
2012 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2013 return MCDisassembler::Fail;
2018 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2019 uint64_t Address, const void *Decoder) {
2020 DecodeStatus S = MCDisassembler::Success;
2022 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2023 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2024 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2025 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2026 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2029 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2031 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2032 return MCDisassembler::Fail;
2033 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2034 return MCDisassembler::Fail;
2035 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2036 return MCDisassembler::Fail;
2037 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2038 return MCDisassembler::Fail;
2040 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2041 return MCDisassembler::Fail;
2046 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2047 uint64_t Address, const void *Decoder) {
2048 DecodeStatus S = MCDisassembler::Success;
2050 unsigned add = fieldFromInstruction(Val, 12, 1);
2051 unsigned imm = fieldFromInstruction(Val, 0, 12);
2052 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2054 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2055 return MCDisassembler::Fail;
2057 if (!add) imm *= -1;
2058 if (imm == 0 && !add) imm = INT32_MIN;
2059 Inst.addOperand(MCOperand::CreateImm(imm));
2061 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2066 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2067 uint64_t Address, const void *Decoder) {
2068 DecodeStatus S = MCDisassembler::Success;
2070 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2071 unsigned U = fieldFromInstruction(Val, 8, 1);
2072 unsigned imm = fieldFromInstruction(Val, 0, 8);
2074 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2075 return MCDisassembler::Fail;
2078 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2080 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2085 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2086 uint64_t Address, const void *Decoder) {
2087 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2091 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2092 uint64_t Address, const void *Decoder) {
2093 DecodeStatus S = MCDisassembler::Success;
2094 unsigned imm = (fieldFromInstruction(Insn, 0, 11) << 0) |
2095 (fieldFromInstruction(Insn, 11, 1) << 18) |
2096 (fieldFromInstruction(Insn, 13, 1) << 17) |
2097 (fieldFromInstruction(Insn, 16, 6) << 11) |
2098 (fieldFromInstruction(Insn, 26, 1) << 19);
2099 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<20>(imm<<1) + 4,
2100 true, 4, Inst, Decoder))
2101 Inst.addOperand(MCOperand::CreateImm(SignExtend32<20>(imm << 1)));
2106 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2107 uint64_t Address, const void *Decoder) {
2108 DecodeStatus S = MCDisassembler::Success;
2110 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2111 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2114 Inst.setOpcode(ARM::BLXi);
2115 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2116 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2117 true, 4, Inst, Decoder))
2118 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2122 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2123 true, 4, Inst, Decoder))
2124 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2125 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2126 return MCDisassembler::Fail;
2132 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2133 uint64_t Address, const void *Decoder) {
2134 DecodeStatus S = MCDisassembler::Success;
2136 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2137 unsigned align = fieldFromInstruction(Val, 4, 2);
2139 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2140 return MCDisassembler::Fail;
2142 Inst.addOperand(MCOperand::CreateImm(0));
2144 Inst.addOperand(MCOperand::CreateImm(4 << align));
2149 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2150 uint64_t Address, const void *Decoder) {
2151 DecodeStatus S = MCDisassembler::Success;
2153 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2154 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2155 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2156 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2157 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2158 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2160 // First output register
2161 switch (Inst.getOpcode()) {
2162 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2163 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2164 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2165 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2166 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2167 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2168 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2169 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2170 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2171 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2172 return MCDisassembler::Fail;
2177 case ARM::VLD2b16wb_fixed:
2178 case ARM::VLD2b16wb_register:
2179 case ARM::VLD2b32wb_fixed:
2180 case ARM::VLD2b32wb_register:
2181 case ARM::VLD2b8wb_fixed:
2182 case ARM::VLD2b8wb_register:
2183 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2184 return MCDisassembler::Fail;
2187 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2188 return MCDisassembler::Fail;
2191 // Second output register
2192 switch (Inst.getOpcode()) {
2196 case ARM::VLD3d8_UPD:
2197 case ARM::VLD3d16_UPD:
2198 case ARM::VLD3d32_UPD:
2202 case ARM::VLD4d8_UPD:
2203 case ARM::VLD4d16_UPD:
2204 case ARM::VLD4d32_UPD:
2205 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2206 return MCDisassembler::Fail;
2211 case ARM::VLD3q8_UPD:
2212 case ARM::VLD3q16_UPD:
2213 case ARM::VLD3q32_UPD:
2217 case ARM::VLD4q8_UPD:
2218 case ARM::VLD4q16_UPD:
2219 case ARM::VLD4q32_UPD:
2220 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2221 return MCDisassembler::Fail;
2226 // Third output register
2227 switch(Inst.getOpcode()) {
2231 case ARM::VLD3d8_UPD:
2232 case ARM::VLD3d16_UPD:
2233 case ARM::VLD3d32_UPD:
2237 case ARM::VLD4d8_UPD:
2238 case ARM::VLD4d16_UPD:
2239 case ARM::VLD4d32_UPD:
2240 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2241 return MCDisassembler::Fail;
2246 case ARM::VLD3q8_UPD:
2247 case ARM::VLD3q16_UPD:
2248 case ARM::VLD3q32_UPD:
2252 case ARM::VLD4q8_UPD:
2253 case ARM::VLD4q16_UPD:
2254 case ARM::VLD4q32_UPD:
2255 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2256 return MCDisassembler::Fail;
2262 // Fourth output register
2263 switch (Inst.getOpcode()) {
2267 case ARM::VLD4d8_UPD:
2268 case ARM::VLD4d16_UPD:
2269 case ARM::VLD4d32_UPD:
2270 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2271 return MCDisassembler::Fail;
2276 case ARM::VLD4q8_UPD:
2277 case ARM::VLD4q16_UPD:
2278 case ARM::VLD4q32_UPD:
2279 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2280 return MCDisassembler::Fail;
2286 // Writeback operand
2287 switch (Inst.getOpcode()) {
2288 case ARM::VLD1d8wb_fixed:
2289 case ARM::VLD1d16wb_fixed:
2290 case ARM::VLD1d32wb_fixed:
2291 case ARM::VLD1d64wb_fixed:
2292 case ARM::VLD1d8wb_register:
2293 case ARM::VLD1d16wb_register:
2294 case ARM::VLD1d32wb_register:
2295 case ARM::VLD1d64wb_register:
2296 case ARM::VLD1q8wb_fixed:
2297 case ARM::VLD1q16wb_fixed:
2298 case ARM::VLD1q32wb_fixed:
2299 case ARM::VLD1q64wb_fixed:
2300 case ARM::VLD1q8wb_register:
2301 case ARM::VLD1q16wb_register:
2302 case ARM::VLD1q32wb_register:
2303 case ARM::VLD1q64wb_register:
2304 case ARM::VLD1d8Twb_fixed:
2305 case ARM::VLD1d8Twb_register:
2306 case ARM::VLD1d16Twb_fixed:
2307 case ARM::VLD1d16Twb_register:
2308 case ARM::VLD1d32Twb_fixed:
2309 case ARM::VLD1d32Twb_register:
2310 case ARM::VLD1d64Twb_fixed:
2311 case ARM::VLD1d64Twb_register:
2312 case ARM::VLD1d8Qwb_fixed:
2313 case ARM::VLD1d8Qwb_register:
2314 case ARM::VLD1d16Qwb_fixed:
2315 case ARM::VLD1d16Qwb_register:
2316 case ARM::VLD1d32Qwb_fixed:
2317 case ARM::VLD1d32Qwb_register:
2318 case ARM::VLD1d64Qwb_fixed:
2319 case ARM::VLD1d64Qwb_register:
2320 case ARM::VLD2d8wb_fixed:
2321 case ARM::VLD2d16wb_fixed:
2322 case ARM::VLD2d32wb_fixed:
2323 case ARM::VLD2q8wb_fixed:
2324 case ARM::VLD2q16wb_fixed:
2325 case ARM::VLD2q32wb_fixed:
2326 case ARM::VLD2d8wb_register:
2327 case ARM::VLD2d16wb_register:
2328 case ARM::VLD2d32wb_register:
2329 case ARM::VLD2q8wb_register:
2330 case ARM::VLD2q16wb_register:
2331 case ARM::VLD2q32wb_register:
2332 case ARM::VLD2b8wb_fixed:
2333 case ARM::VLD2b16wb_fixed:
2334 case ARM::VLD2b32wb_fixed:
2335 case ARM::VLD2b8wb_register:
2336 case ARM::VLD2b16wb_register:
2337 case ARM::VLD2b32wb_register:
2338 Inst.addOperand(MCOperand::CreateImm(0));
2340 case ARM::VLD3d8_UPD:
2341 case ARM::VLD3d16_UPD:
2342 case ARM::VLD3d32_UPD:
2343 case ARM::VLD3q8_UPD:
2344 case ARM::VLD3q16_UPD:
2345 case ARM::VLD3q32_UPD:
2346 case ARM::VLD4d8_UPD:
2347 case ARM::VLD4d16_UPD:
2348 case ARM::VLD4d32_UPD:
2349 case ARM::VLD4q8_UPD:
2350 case ARM::VLD4q16_UPD:
2351 case ARM::VLD4q32_UPD:
2352 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2353 return MCDisassembler::Fail;
2359 // AddrMode6 Base (register+alignment)
2360 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2361 return MCDisassembler::Fail;
2363 // AddrMode6 Offset (register)
2364 switch (Inst.getOpcode()) {
2366 // The below have been updated to have explicit am6offset split
2367 // between fixed and register offset. For those instructions not
2368 // yet updated, we need to add an additional reg0 operand for the
2371 // The fixed offset encodes as Rm == 0xd, so we check for that.
2373 Inst.addOperand(MCOperand::CreateReg(0));
2376 // Fall through to handle the register offset variant.
2377 case ARM::VLD1d8wb_fixed:
2378 case ARM::VLD1d16wb_fixed:
2379 case ARM::VLD1d32wb_fixed:
2380 case ARM::VLD1d64wb_fixed:
2381 case ARM::VLD1d8Twb_fixed:
2382 case ARM::VLD1d16Twb_fixed:
2383 case ARM::VLD1d32Twb_fixed:
2384 case ARM::VLD1d64Twb_fixed:
2385 case ARM::VLD1d8Qwb_fixed:
2386 case ARM::VLD1d16Qwb_fixed:
2387 case ARM::VLD1d32Qwb_fixed:
2388 case ARM::VLD1d64Qwb_fixed:
2389 case ARM::VLD1d8wb_register:
2390 case ARM::VLD1d16wb_register:
2391 case ARM::VLD1d32wb_register:
2392 case ARM::VLD1d64wb_register:
2393 case ARM::VLD1q8wb_fixed:
2394 case ARM::VLD1q16wb_fixed:
2395 case ARM::VLD1q32wb_fixed:
2396 case ARM::VLD1q64wb_fixed:
2397 case ARM::VLD1q8wb_register:
2398 case ARM::VLD1q16wb_register:
2399 case ARM::VLD1q32wb_register:
2400 case ARM::VLD1q64wb_register:
2401 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2402 // variant encodes Rm == 0xf. Anything else is a register offset post-
2403 // increment and we need to add the register operand to the instruction.
2404 if (Rm != 0xD && Rm != 0xF &&
2405 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2406 return MCDisassembler::Fail;
2408 case ARM::VLD2d8wb_fixed:
2409 case ARM::VLD2d16wb_fixed:
2410 case ARM::VLD2d32wb_fixed:
2411 case ARM::VLD2b8wb_fixed:
2412 case ARM::VLD2b16wb_fixed:
2413 case ARM::VLD2b32wb_fixed:
2414 case ARM::VLD2q8wb_fixed:
2415 case ARM::VLD2q16wb_fixed:
2416 case ARM::VLD2q32wb_fixed:
2423 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2424 uint64_t Address, const void *Decoder) {
2425 DecodeStatus S = MCDisassembler::Success;
2427 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2428 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2429 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2430 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2431 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2432 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2434 // Writeback Operand
2435 switch (Inst.getOpcode()) {
2436 case ARM::VST1d8wb_fixed:
2437 case ARM::VST1d16wb_fixed:
2438 case ARM::VST1d32wb_fixed:
2439 case ARM::VST1d64wb_fixed:
2440 case ARM::VST1d8wb_register:
2441 case ARM::VST1d16wb_register:
2442 case ARM::VST1d32wb_register:
2443 case ARM::VST1d64wb_register:
2444 case ARM::VST1q8wb_fixed:
2445 case ARM::VST1q16wb_fixed:
2446 case ARM::VST1q32wb_fixed:
2447 case ARM::VST1q64wb_fixed:
2448 case ARM::VST1q8wb_register:
2449 case ARM::VST1q16wb_register:
2450 case ARM::VST1q32wb_register:
2451 case ARM::VST1q64wb_register:
2452 case ARM::VST1d8Twb_fixed:
2453 case ARM::VST1d16Twb_fixed:
2454 case ARM::VST1d32Twb_fixed:
2455 case ARM::VST1d64Twb_fixed:
2456 case ARM::VST1d8Twb_register:
2457 case ARM::VST1d16Twb_register:
2458 case ARM::VST1d32Twb_register:
2459 case ARM::VST1d64Twb_register:
2460 case ARM::VST1d8Qwb_fixed:
2461 case ARM::VST1d16Qwb_fixed:
2462 case ARM::VST1d32Qwb_fixed:
2463 case ARM::VST1d64Qwb_fixed:
2464 case ARM::VST1d8Qwb_register:
2465 case ARM::VST1d16Qwb_register:
2466 case ARM::VST1d32Qwb_register:
2467 case ARM::VST1d64Qwb_register:
2468 case ARM::VST2d8wb_fixed:
2469 case ARM::VST2d16wb_fixed:
2470 case ARM::VST2d32wb_fixed:
2471 case ARM::VST2d8wb_register:
2472 case ARM::VST2d16wb_register:
2473 case ARM::VST2d32wb_register:
2474 case ARM::VST2q8wb_fixed:
2475 case ARM::VST2q16wb_fixed:
2476 case ARM::VST2q32wb_fixed:
2477 case ARM::VST2q8wb_register:
2478 case ARM::VST2q16wb_register:
2479 case ARM::VST2q32wb_register:
2480 case ARM::VST2b8wb_fixed:
2481 case ARM::VST2b16wb_fixed:
2482 case ARM::VST2b32wb_fixed:
2483 case ARM::VST2b8wb_register:
2484 case ARM::VST2b16wb_register:
2485 case ARM::VST2b32wb_register:
2487 return MCDisassembler::Fail;
2488 Inst.addOperand(MCOperand::CreateImm(0));
2490 case ARM::VST3d8_UPD:
2491 case ARM::VST3d16_UPD:
2492 case ARM::VST3d32_UPD:
2493 case ARM::VST3q8_UPD:
2494 case ARM::VST3q16_UPD:
2495 case ARM::VST3q32_UPD:
2496 case ARM::VST4d8_UPD:
2497 case ARM::VST4d16_UPD:
2498 case ARM::VST4d32_UPD:
2499 case ARM::VST4q8_UPD:
2500 case ARM::VST4q16_UPD:
2501 case ARM::VST4q32_UPD:
2502 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2503 return MCDisassembler::Fail;
2509 // AddrMode6 Base (register+alignment)
2510 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2511 return MCDisassembler::Fail;
2513 // AddrMode6 Offset (register)
2514 switch (Inst.getOpcode()) {
2517 Inst.addOperand(MCOperand::CreateReg(0));
2518 else if (Rm != 0xF) {
2519 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2520 return MCDisassembler::Fail;
2523 case ARM::VST1d8wb_fixed:
2524 case ARM::VST1d16wb_fixed:
2525 case ARM::VST1d32wb_fixed:
2526 case ARM::VST1d64wb_fixed:
2527 case ARM::VST1q8wb_fixed:
2528 case ARM::VST1q16wb_fixed:
2529 case ARM::VST1q32wb_fixed:
2530 case ARM::VST1q64wb_fixed:
2531 case ARM::VST1d8Twb_fixed:
2532 case ARM::VST1d16Twb_fixed:
2533 case ARM::VST1d32Twb_fixed:
2534 case ARM::VST1d64Twb_fixed:
2535 case ARM::VST1d8Qwb_fixed:
2536 case ARM::VST1d16Qwb_fixed:
2537 case ARM::VST1d32Qwb_fixed:
2538 case ARM::VST1d64Qwb_fixed:
2539 case ARM::VST2d8wb_fixed:
2540 case ARM::VST2d16wb_fixed:
2541 case ARM::VST2d32wb_fixed:
2542 case ARM::VST2q8wb_fixed:
2543 case ARM::VST2q16wb_fixed:
2544 case ARM::VST2q32wb_fixed:
2545 case ARM::VST2b8wb_fixed:
2546 case ARM::VST2b16wb_fixed:
2547 case ARM::VST2b32wb_fixed:
2552 // First input register
2553 switch (Inst.getOpcode()) {
2558 case ARM::VST1q16wb_fixed:
2559 case ARM::VST1q16wb_register:
2560 case ARM::VST1q32wb_fixed:
2561 case ARM::VST1q32wb_register:
2562 case ARM::VST1q64wb_fixed:
2563 case ARM::VST1q64wb_register:
2564 case ARM::VST1q8wb_fixed:
2565 case ARM::VST1q8wb_register:
2569 case ARM::VST2d16wb_fixed:
2570 case ARM::VST2d16wb_register:
2571 case ARM::VST2d32wb_fixed:
2572 case ARM::VST2d32wb_register:
2573 case ARM::VST2d8wb_fixed:
2574 case ARM::VST2d8wb_register:
2575 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2576 return MCDisassembler::Fail;
2581 case ARM::VST2b16wb_fixed:
2582 case ARM::VST2b16wb_register:
2583 case ARM::VST2b32wb_fixed:
2584 case ARM::VST2b32wb_register:
2585 case ARM::VST2b8wb_fixed:
2586 case ARM::VST2b8wb_register:
2587 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2588 return MCDisassembler::Fail;
2591 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2592 return MCDisassembler::Fail;
2595 // Second input register
2596 switch (Inst.getOpcode()) {
2600 case ARM::VST3d8_UPD:
2601 case ARM::VST3d16_UPD:
2602 case ARM::VST3d32_UPD:
2606 case ARM::VST4d8_UPD:
2607 case ARM::VST4d16_UPD:
2608 case ARM::VST4d32_UPD:
2609 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2610 return MCDisassembler::Fail;
2615 case ARM::VST3q8_UPD:
2616 case ARM::VST3q16_UPD:
2617 case ARM::VST3q32_UPD:
2621 case ARM::VST4q8_UPD:
2622 case ARM::VST4q16_UPD:
2623 case ARM::VST4q32_UPD:
2624 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2625 return MCDisassembler::Fail;
2631 // Third input register
2632 switch (Inst.getOpcode()) {
2636 case ARM::VST3d8_UPD:
2637 case ARM::VST3d16_UPD:
2638 case ARM::VST3d32_UPD:
2642 case ARM::VST4d8_UPD:
2643 case ARM::VST4d16_UPD:
2644 case ARM::VST4d32_UPD:
2645 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2646 return MCDisassembler::Fail;
2651 case ARM::VST3q8_UPD:
2652 case ARM::VST3q16_UPD:
2653 case ARM::VST3q32_UPD:
2657 case ARM::VST4q8_UPD:
2658 case ARM::VST4q16_UPD:
2659 case ARM::VST4q32_UPD:
2660 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2661 return MCDisassembler::Fail;
2667 // Fourth input register
2668 switch (Inst.getOpcode()) {
2672 case ARM::VST4d8_UPD:
2673 case ARM::VST4d16_UPD:
2674 case ARM::VST4d32_UPD:
2675 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2676 return MCDisassembler::Fail;
2681 case ARM::VST4q8_UPD:
2682 case ARM::VST4q16_UPD:
2683 case ARM::VST4q32_UPD:
2684 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2685 return MCDisassembler::Fail;
2694 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2695 uint64_t Address, const void *Decoder) {
2696 DecodeStatus S = MCDisassembler::Success;
2698 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2699 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2700 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2701 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2702 unsigned align = fieldFromInstruction(Insn, 4, 1);
2703 unsigned size = fieldFromInstruction(Insn, 6, 2);
2705 align *= (1 << size);
2707 switch (Inst.getOpcode()) {
2708 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2709 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2710 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2711 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2712 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2713 return MCDisassembler::Fail;
2716 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2717 return MCDisassembler::Fail;
2721 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2722 return MCDisassembler::Fail;
2725 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2726 return MCDisassembler::Fail;
2727 Inst.addOperand(MCOperand::CreateImm(align));
2729 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2730 // variant encodes Rm == 0xf. Anything else is a register offset post-
2731 // increment and we need to add the register operand to the instruction.
2732 if (Rm != 0xD && Rm != 0xF &&
2733 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2734 return MCDisassembler::Fail;
2739 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2740 uint64_t Address, const void *Decoder) {
2741 DecodeStatus S = MCDisassembler::Success;
2743 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2744 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2745 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2746 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2747 unsigned align = fieldFromInstruction(Insn, 4, 1);
2748 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2751 switch (Inst.getOpcode()) {
2752 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2753 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2754 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2755 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2756 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2757 return MCDisassembler::Fail;
2759 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2760 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2761 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2762 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2763 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2764 return MCDisassembler::Fail;
2767 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2768 return MCDisassembler::Fail;
2773 Inst.addOperand(MCOperand::CreateImm(0));
2775 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2776 return MCDisassembler::Fail;
2777 Inst.addOperand(MCOperand::CreateImm(align));
2779 if (Rm != 0xD && Rm != 0xF) {
2780 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2781 return MCDisassembler::Fail;
2787 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2788 uint64_t Address, const void *Decoder) {
2789 DecodeStatus S = MCDisassembler::Success;
2791 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2792 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2793 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2794 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2795 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2797 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2798 return MCDisassembler::Fail;
2799 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2800 return MCDisassembler::Fail;
2801 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2802 return MCDisassembler::Fail;
2804 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2805 return MCDisassembler::Fail;
2808 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2809 return MCDisassembler::Fail;
2810 Inst.addOperand(MCOperand::CreateImm(0));
2813 Inst.addOperand(MCOperand::CreateReg(0));
2814 else if (Rm != 0xF) {
2815 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2816 return MCDisassembler::Fail;
2822 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2823 uint64_t Address, const void *Decoder) {
2824 DecodeStatus S = MCDisassembler::Success;
2826 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2827 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2828 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2829 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2830 unsigned size = fieldFromInstruction(Insn, 6, 2);
2831 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2832 unsigned align = fieldFromInstruction(Insn, 4, 1);
2847 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2848 return MCDisassembler::Fail;
2849 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2850 return MCDisassembler::Fail;
2851 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2852 return MCDisassembler::Fail;
2853 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2854 return MCDisassembler::Fail;
2856 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2857 return MCDisassembler::Fail;
2860 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2861 return MCDisassembler::Fail;
2862 Inst.addOperand(MCOperand::CreateImm(align));
2865 Inst.addOperand(MCOperand::CreateReg(0));
2866 else if (Rm != 0xF) {
2867 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2868 return MCDisassembler::Fail;
2875 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2876 uint64_t Address, const void *Decoder) {
2877 DecodeStatus S = MCDisassembler::Success;
2879 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2880 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2881 unsigned imm = fieldFromInstruction(Insn, 0, 4);
2882 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2883 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2884 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2885 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2886 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2889 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2890 return MCDisassembler::Fail;
2892 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2893 return MCDisassembler::Fail;
2896 Inst.addOperand(MCOperand::CreateImm(imm));
2898 switch (Inst.getOpcode()) {
2899 case ARM::VORRiv4i16:
2900 case ARM::VORRiv2i32:
2901 case ARM::VBICiv4i16:
2902 case ARM::VBICiv2i32:
2903 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2904 return MCDisassembler::Fail;
2906 case ARM::VORRiv8i16:
2907 case ARM::VORRiv4i32:
2908 case ARM::VBICiv8i16:
2909 case ARM::VBICiv4i32:
2910 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2911 return MCDisassembler::Fail;
2920 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2921 uint64_t Address, const void *Decoder) {
2922 DecodeStatus S = MCDisassembler::Success;
2924 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2925 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2926 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2927 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2928 unsigned size = fieldFromInstruction(Insn, 18, 2);
2930 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2931 return MCDisassembler::Fail;
2932 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2933 return MCDisassembler::Fail;
2934 Inst.addOperand(MCOperand::CreateImm(8 << size));
2939 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2940 uint64_t Address, const void *Decoder) {
2941 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2942 return MCDisassembler::Success;
2945 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2946 uint64_t Address, const void *Decoder) {
2947 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2948 return MCDisassembler::Success;
2951 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2952 uint64_t Address, const void *Decoder) {
2953 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2954 return MCDisassembler::Success;
2957 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2958 uint64_t Address, const void *Decoder) {
2959 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2960 return MCDisassembler::Success;
2963 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2964 uint64_t Address, const void *Decoder) {
2965 DecodeStatus S = MCDisassembler::Success;
2967 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2968 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2969 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2970 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
2971 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2972 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2973 unsigned op = fieldFromInstruction(Insn, 6, 1);
2975 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2976 return MCDisassembler::Fail;
2978 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2979 return MCDisassembler::Fail; // Writeback
2982 switch (Inst.getOpcode()) {
2985 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
2986 return MCDisassembler::Fail;
2989 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
2990 return MCDisassembler::Fail;
2993 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2994 return MCDisassembler::Fail;
2999 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3000 uint64_t Address, const void *Decoder) {
3001 DecodeStatus S = MCDisassembler::Success;
3003 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3004 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3006 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3007 return MCDisassembler::Fail;
3009 switch(Inst.getOpcode()) {
3011 return MCDisassembler::Fail;
3013 break; // tADR does not explicitly represent the PC as an operand.
3015 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3019 Inst.addOperand(MCOperand::CreateImm(imm));
3023 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3024 uint64_t Address, const void *Decoder) {
3025 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3026 true, 2, Inst, Decoder))
3027 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3028 return MCDisassembler::Success;
3031 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3032 uint64_t Address, const void *Decoder) {
3033 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3034 true, 4, Inst, Decoder))
3035 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3036 return MCDisassembler::Success;
3039 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3040 uint64_t Address, const void *Decoder) {
3041 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<7>(Val<<1) + 4,
3042 true, 2, Inst, Decoder))
3043 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
3044 return MCDisassembler::Success;
3047 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3048 uint64_t Address, const void *Decoder) {
3049 DecodeStatus S = MCDisassembler::Success;
3051 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3052 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3054 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3055 return MCDisassembler::Fail;
3056 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3057 return MCDisassembler::Fail;
3062 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3063 uint64_t Address, const void *Decoder) {
3064 DecodeStatus S = MCDisassembler::Success;
3066 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3067 unsigned imm = fieldFromInstruction(Val, 3, 5);
3069 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3070 return MCDisassembler::Fail;
3071 Inst.addOperand(MCOperand::CreateImm(imm));
3076 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3077 uint64_t Address, const void *Decoder) {
3078 unsigned imm = Val << 2;
3080 Inst.addOperand(MCOperand::CreateImm(imm));
3081 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3083 return MCDisassembler::Success;
3086 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3087 uint64_t Address, const void *Decoder) {
3088 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3089 Inst.addOperand(MCOperand::CreateImm(Val));
3091 return MCDisassembler::Success;
3094 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3095 uint64_t Address, const void *Decoder) {
3096 DecodeStatus S = MCDisassembler::Success;
3098 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3099 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3100 unsigned imm = fieldFromInstruction(Val, 0, 2);
3102 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3103 return MCDisassembler::Fail;
3104 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3105 return MCDisassembler::Fail;
3106 Inst.addOperand(MCOperand::CreateImm(imm));
3111 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3112 uint64_t Address, const void *Decoder) {
3113 DecodeStatus S = MCDisassembler::Success;
3115 switch (Inst.getOpcode()) {
3121 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3122 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3123 return MCDisassembler::Fail;
3127 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3129 switch (Inst.getOpcode()) {
3131 Inst.setOpcode(ARM::t2LDRBpci);
3134 Inst.setOpcode(ARM::t2LDRHpci);
3137 Inst.setOpcode(ARM::t2LDRSHpci);
3140 Inst.setOpcode(ARM::t2LDRSBpci);
3143 Inst.setOpcode(ARM::t2PLDi12);
3144 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3147 return MCDisassembler::Fail;
3150 int imm = fieldFromInstruction(Insn, 0, 12);
3151 if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
3152 Inst.addOperand(MCOperand::CreateImm(imm));
3157 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3158 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3159 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3160 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3161 return MCDisassembler::Fail;
3166 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3167 uint64_t Address, const void *Decoder) {
3169 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3171 int imm = Val & 0xFF;
3173 if (!(Val & 0x100)) imm *= -1;
3174 Inst.addOperand(MCOperand::CreateImm(imm << 2));
3177 return MCDisassembler::Success;
3180 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3181 uint64_t Address, const void *Decoder) {
3182 DecodeStatus S = MCDisassembler::Success;
3184 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3185 unsigned imm = fieldFromInstruction(Val, 0, 9);
3187 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3188 return MCDisassembler::Fail;
3189 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3190 return MCDisassembler::Fail;
3195 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3196 uint64_t Address, const void *Decoder) {
3197 DecodeStatus S = MCDisassembler::Success;
3199 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3200 unsigned imm = fieldFromInstruction(Val, 0, 8);
3202 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3203 return MCDisassembler::Fail;
3205 Inst.addOperand(MCOperand::CreateImm(imm));
3210 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3211 uint64_t Address, const void *Decoder) {
3212 int imm = Val & 0xFF;
3215 else if (!(Val & 0x100))
3217 Inst.addOperand(MCOperand::CreateImm(imm));
3219 return MCDisassembler::Success;
3223 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3224 uint64_t Address, const void *Decoder) {
3225 DecodeStatus S = MCDisassembler::Success;
3227 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3228 unsigned imm = fieldFromInstruction(Val, 0, 9);
3230 // Some instructions always use an additive offset.
3231 switch (Inst.getOpcode()) {
3246 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3247 return MCDisassembler::Fail;
3248 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3249 return MCDisassembler::Fail;
3254 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3255 uint64_t Address, const void *Decoder) {
3256 DecodeStatus S = MCDisassembler::Success;
3258 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3259 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3260 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3261 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3263 unsigned load = fieldFromInstruction(Insn, 20, 1);
3266 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3267 return MCDisassembler::Fail;
3270 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3271 return MCDisassembler::Fail;
3274 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3275 return MCDisassembler::Fail;
3278 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3279 return MCDisassembler::Fail;
3284 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3285 uint64_t Address, const void *Decoder) {
3286 DecodeStatus S = MCDisassembler::Success;
3288 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3289 unsigned imm = fieldFromInstruction(Val, 0, 12);
3291 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3292 return MCDisassembler::Fail;
3293 Inst.addOperand(MCOperand::CreateImm(imm));
3299 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3300 uint64_t Address, const void *Decoder) {
3301 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3303 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3304 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3305 Inst.addOperand(MCOperand::CreateImm(imm));
3307 return MCDisassembler::Success;
3310 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3311 uint64_t Address, const void *Decoder) {
3312 DecodeStatus S = MCDisassembler::Success;
3314 if (Inst.getOpcode() == ARM::tADDrSP) {
3315 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3316 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3318 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3319 return MCDisassembler::Fail;
3320 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3321 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3322 return MCDisassembler::Fail;
3323 } else if (Inst.getOpcode() == ARM::tADDspr) {
3324 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3326 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3327 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3328 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3329 return MCDisassembler::Fail;
3335 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3336 uint64_t Address, const void *Decoder) {
3337 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3338 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3340 Inst.addOperand(MCOperand::CreateImm(imod));
3341 Inst.addOperand(MCOperand::CreateImm(flags));
3343 return MCDisassembler::Success;
3346 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3347 uint64_t Address, const void *Decoder) {
3348 DecodeStatus S = MCDisassembler::Success;
3349 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3350 unsigned add = fieldFromInstruction(Insn, 4, 1);
3352 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3353 return MCDisassembler::Fail;
3354 Inst.addOperand(MCOperand::CreateImm(add));
3359 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3360 uint64_t Address, const void *Decoder) {
3361 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3362 // Note only one trailing zero not two. Also the J1 and J2 values are from
3363 // the encoded instruction. So here change to I1 and I2 values via:
3364 // I1 = NOT(J1 EOR S);
3365 // I2 = NOT(J2 EOR S);
3366 // and build the imm32 with two trailing zeros as documented:
3367 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3368 unsigned S = (Val >> 23) & 1;
3369 unsigned J1 = (Val >> 22) & 1;
3370 unsigned J2 = (Val >> 21) & 1;
3371 unsigned I1 = !(J1 ^ S);
3372 unsigned I2 = !(J2 ^ S);
3373 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3374 int imm32 = SignExtend32<25>(tmp << 1);
3376 if (!tryAddingSymbolicOperand(Address,
3377 (Address & ~2u) + imm32 + 4,
3378 true, 4, Inst, Decoder))
3379 Inst.addOperand(MCOperand::CreateImm(imm32));
3380 return MCDisassembler::Success;
3383 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3384 uint64_t Address, const void *Decoder) {
3385 if (Val == 0xA || Val == 0xB)
3386 return MCDisassembler::Fail;
3388 Inst.addOperand(MCOperand::CreateImm(Val));
3389 return MCDisassembler::Success;
3393 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3394 uint64_t Address, const void *Decoder) {
3395 DecodeStatus S = MCDisassembler::Success;
3397 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3398 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3400 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3401 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3402 return MCDisassembler::Fail;
3403 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3404 return MCDisassembler::Fail;
3409 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3410 uint64_t Address, const void *Decoder) {
3411 DecodeStatus S = MCDisassembler::Success;
3413 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3414 if (pred == 0xE || pred == 0xF) {
3415 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3418 return MCDisassembler::Fail;
3420 Inst.setOpcode(ARM::t2DSB);
3423 Inst.setOpcode(ARM::t2DMB);
3426 Inst.setOpcode(ARM::t2ISB);
3430 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3431 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3434 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3435 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3436 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3437 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3438 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3440 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3441 return MCDisassembler::Fail;
3442 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3443 return MCDisassembler::Fail;
3448 // Decode a shifted immediate operand. These basically consist
3449 // of an 8-bit value, and a 4-bit directive that specifies either
3450 // a splat operation or a rotation.
3451 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3452 uint64_t Address, const void *Decoder) {
3453 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3455 unsigned byte = fieldFromInstruction(Val, 8, 2);
3456 unsigned imm = fieldFromInstruction(Val, 0, 8);
3459 Inst.addOperand(MCOperand::CreateImm(imm));
3462 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3465 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3468 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3473 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3474 unsigned rot = fieldFromInstruction(Val, 7, 5);
3475 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3476 Inst.addOperand(MCOperand::CreateImm(imm));
3479 return MCDisassembler::Success;
3483 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3484 uint64_t Address, const void *Decoder){
3485 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3486 true, 2, Inst, Decoder))
3487 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3488 return MCDisassembler::Success;
3491 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3492 uint64_t Address, const void *Decoder){
3493 // Val is passed in as S:J1:J2:imm10:imm11
3494 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3495 // the encoded instruction. So here change to I1 and I2 values via:
3496 // I1 = NOT(J1 EOR S);
3497 // I2 = NOT(J2 EOR S);
3498 // and build the imm32 with one trailing zero as documented:
3499 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3500 unsigned S = (Val >> 23) & 1;
3501 unsigned J1 = (Val >> 22) & 1;
3502 unsigned J2 = (Val >> 21) & 1;
3503 unsigned I1 = !(J1 ^ S);
3504 unsigned I2 = !(J2 ^ S);
3505 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3506 int imm32 = SignExtend32<25>(tmp << 1);
3508 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3509 true, 4, Inst, Decoder))
3510 Inst.addOperand(MCOperand::CreateImm(imm32));
3511 return MCDisassembler::Success;
3514 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3515 uint64_t Address, const void *Decoder) {
3517 return MCDisassembler::Fail;
3519 Inst.addOperand(MCOperand::CreateImm(Val));
3520 return MCDisassembler::Success;
3523 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3524 uint64_t Address, const void *Decoder) {
3525 if (!Val) return MCDisassembler::Fail;
3526 Inst.addOperand(MCOperand::CreateImm(Val));
3527 return MCDisassembler::Success;
3530 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3531 uint64_t Address, const void *Decoder) {
3532 DecodeStatus S = MCDisassembler::Success;
3534 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3535 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3536 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3538 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3540 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3541 return MCDisassembler::Fail;
3542 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3543 return MCDisassembler::Fail;
3544 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3545 return MCDisassembler::Fail;
3546 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3547 return MCDisassembler::Fail;
3553 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3554 uint64_t Address, const void *Decoder){
3555 DecodeStatus S = MCDisassembler::Success;
3557 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3558 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3559 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3560 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3562 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3563 return MCDisassembler::Fail;
3565 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3566 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3568 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3569 return MCDisassembler::Fail;
3570 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3571 return MCDisassembler::Fail;
3572 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3573 return MCDisassembler::Fail;
3574 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3575 return MCDisassembler::Fail;
3580 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3581 uint64_t Address, const void *Decoder) {
3582 DecodeStatus S = MCDisassembler::Success;
3584 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3585 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3586 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3587 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3588 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3589 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3591 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3593 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3594 return MCDisassembler::Fail;
3595 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3596 return MCDisassembler::Fail;
3597 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3598 return MCDisassembler::Fail;
3599 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3600 return MCDisassembler::Fail;
3605 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3606 uint64_t Address, const void *Decoder) {
3607 DecodeStatus S = MCDisassembler::Success;
3609 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3610 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3611 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3612 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3613 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3614 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3615 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3617 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3618 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3620 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3621 return MCDisassembler::Fail;
3622 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3623 return MCDisassembler::Fail;
3624 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3625 return MCDisassembler::Fail;
3626 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3627 return MCDisassembler::Fail;
3633 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3634 uint64_t Address, const void *Decoder) {
3635 DecodeStatus S = MCDisassembler::Success;
3637 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3638 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3639 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3640 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3641 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3642 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3644 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3646 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3647 return MCDisassembler::Fail;
3648 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3649 return MCDisassembler::Fail;
3650 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3651 return MCDisassembler::Fail;
3652 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3653 return MCDisassembler::Fail;
3658 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3659 uint64_t Address, const void *Decoder) {
3660 DecodeStatus S = MCDisassembler::Success;
3662 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3663 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3664 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3665 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3666 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3667 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3669 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3671 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3672 return MCDisassembler::Fail;
3673 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3674 return MCDisassembler::Fail;
3675 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3676 return MCDisassembler::Fail;
3677 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3678 return MCDisassembler::Fail;
3683 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3684 uint64_t Address, const void *Decoder) {
3685 DecodeStatus S = MCDisassembler::Success;
3687 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3688 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3689 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3690 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3691 unsigned size = fieldFromInstruction(Insn, 10, 2);
3697 return MCDisassembler::Fail;
3699 if (fieldFromInstruction(Insn, 4, 1))
3700 return MCDisassembler::Fail; // UNDEFINED
3701 index = fieldFromInstruction(Insn, 5, 3);
3704 if (fieldFromInstruction(Insn, 5, 1))
3705 return MCDisassembler::Fail; // UNDEFINED
3706 index = fieldFromInstruction(Insn, 6, 2);
3707 if (fieldFromInstruction(Insn, 4, 1))
3711 if (fieldFromInstruction(Insn, 6, 1))
3712 return MCDisassembler::Fail; // UNDEFINED
3713 index = fieldFromInstruction(Insn, 7, 1);
3714 if (fieldFromInstruction(Insn, 4, 2) != 0)
3718 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3719 return MCDisassembler::Fail;
3720 if (Rm != 0xF) { // Writeback
3721 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3722 return MCDisassembler::Fail;
3724 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3725 return MCDisassembler::Fail;
3726 Inst.addOperand(MCOperand::CreateImm(align));
3729 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3730 return MCDisassembler::Fail;
3732 Inst.addOperand(MCOperand::CreateReg(0));
3735 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3736 return MCDisassembler::Fail;
3737 Inst.addOperand(MCOperand::CreateImm(index));
3742 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3743 uint64_t Address, const void *Decoder) {
3744 DecodeStatus S = MCDisassembler::Success;
3746 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3747 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3748 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3749 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3750 unsigned size = fieldFromInstruction(Insn, 10, 2);
3756 return MCDisassembler::Fail;
3758 if (fieldFromInstruction(Insn, 4, 1))
3759 return MCDisassembler::Fail; // UNDEFINED
3760 index = fieldFromInstruction(Insn, 5, 3);
3763 if (fieldFromInstruction(Insn, 5, 1))
3764 return MCDisassembler::Fail; // UNDEFINED
3765 index = fieldFromInstruction(Insn, 6, 2);
3766 if (fieldFromInstruction(Insn, 4, 1))
3770 if (fieldFromInstruction(Insn, 6, 1))
3771 return MCDisassembler::Fail; // UNDEFINED
3772 index = fieldFromInstruction(Insn, 7, 1);
3773 if (fieldFromInstruction(Insn, 4, 2) != 0)
3777 if (Rm != 0xF) { // Writeback
3778 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3779 return MCDisassembler::Fail;
3781 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3782 return MCDisassembler::Fail;
3783 Inst.addOperand(MCOperand::CreateImm(align));
3786 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3787 return MCDisassembler::Fail;
3789 Inst.addOperand(MCOperand::CreateReg(0));
3792 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3793 return MCDisassembler::Fail;
3794 Inst.addOperand(MCOperand::CreateImm(index));
3800 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3801 uint64_t Address, const void *Decoder) {
3802 DecodeStatus S = MCDisassembler::Success;
3804 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3805 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3806 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3807 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3808 unsigned size = fieldFromInstruction(Insn, 10, 2);
3815 return MCDisassembler::Fail;
3817 index = fieldFromInstruction(Insn, 5, 3);
3818 if (fieldFromInstruction(Insn, 4, 1))
3822 index = fieldFromInstruction(Insn, 6, 2);
3823 if (fieldFromInstruction(Insn, 4, 1))
3825 if (fieldFromInstruction(Insn, 5, 1))
3829 if (fieldFromInstruction(Insn, 5, 1))
3830 return MCDisassembler::Fail; // UNDEFINED
3831 index = fieldFromInstruction(Insn, 7, 1);
3832 if (fieldFromInstruction(Insn, 4, 1) != 0)
3834 if (fieldFromInstruction(Insn, 6, 1))
3839 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3840 return MCDisassembler::Fail;
3841 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3842 return MCDisassembler::Fail;
3843 if (Rm != 0xF) { // Writeback
3844 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3845 return MCDisassembler::Fail;
3847 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3848 return MCDisassembler::Fail;
3849 Inst.addOperand(MCOperand::CreateImm(align));
3852 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3853 return MCDisassembler::Fail;
3855 Inst.addOperand(MCOperand::CreateReg(0));
3858 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3859 return MCDisassembler::Fail;
3860 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3861 return MCDisassembler::Fail;
3862 Inst.addOperand(MCOperand::CreateImm(index));
3867 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3868 uint64_t Address, const void *Decoder) {
3869 DecodeStatus S = MCDisassembler::Success;
3871 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3872 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3873 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3874 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3875 unsigned size = fieldFromInstruction(Insn, 10, 2);
3882 return MCDisassembler::Fail;
3884 index = fieldFromInstruction(Insn, 5, 3);
3885 if (fieldFromInstruction(Insn, 4, 1))
3889 index = fieldFromInstruction(Insn, 6, 2);
3890 if (fieldFromInstruction(Insn, 4, 1))
3892 if (fieldFromInstruction(Insn, 5, 1))
3896 if (fieldFromInstruction(Insn, 5, 1))
3897 return MCDisassembler::Fail; // UNDEFINED
3898 index = fieldFromInstruction(Insn, 7, 1);
3899 if (fieldFromInstruction(Insn, 4, 1) != 0)
3901 if (fieldFromInstruction(Insn, 6, 1))
3906 if (Rm != 0xF) { // Writeback
3907 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3908 return MCDisassembler::Fail;
3910 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3911 return MCDisassembler::Fail;
3912 Inst.addOperand(MCOperand::CreateImm(align));
3915 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3916 return MCDisassembler::Fail;
3918 Inst.addOperand(MCOperand::CreateReg(0));
3921 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3922 return MCDisassembler::Fail;
3923 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3924 return MCDisassembler::Fail;
3925 Inst.addOperand(MCOperand::CreateImm(index));
3931 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3932 uint64_t Address, const void *Decoder) {
3933 DecodeStatus S = MCDisassembler::Success;
3935 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3936 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3937 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3938 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3939 unsigned size = fieldFromInstruction(Insn, 10, 2);
3946 return MCDisassembler::Fail;
3948 if (fieldFromInstruction(Insn, 4, 1))
3949 return MCDisassembler::Fail; // UNDEFINED
3950 index = fieldFromInstruction(Insn, 5, 3);
3953 if (fieldFromInstruction(Insn, 4, 1))
3954 return MCDisassembler::Fail; // UNDEFINED
3955 index = fieldFromInstruction(Insn, 6, 2);
3956 if (fieldFromInstruction(Insn, 5, 1))
3960 if (fieldFromInstruction(Insn, 4, 2))
3961 return MCDisassembler::Fail; // UNDEFINED
3962 index = fieldFromInstruction(Insn, 7, 1);
3963 if (fieldFromInstruction(Insn, 6, 1))
3968 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3969 return MCDisassembler::Fail;
3970 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3971 return MCDisassembler::Fail;
3972 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3973 return MCDisassembler::Fail;
3975 if (Rm != 0xF) { // Writeback
3976 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3977 return MCDisassembler::Fail;
3979 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3980 return MCDisassembler::Fail;
3981 Inst.addOperand(MCOperand::CreateImm(align));
3984 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3985 return MCDisassembler::Fail;
3987 Inst.addOperand(MCOperand::CreateReg(0));
3990 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3991 return MCDisassembler::Fail;
3992 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3993 return MCDisassembler::Fail;
3994 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3995 return MCDisassembler::Fail;
3996 Inst.addOperand(MCOperand::CreateImm(index));
4001 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4002 uint64_t Address, const void *Decoder) {
4003 DecodeStatus S = MCDisassembler::Success;
4005 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4006 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4007 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4008 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4009 unsigned size = fieldFromInstruction(Insn, 10, 2);
4016 return MCDisassembler::Fail;
4018 if (fieldFromInstruction(Insn, 4, 1))
4019 return MCDisassembler::Fail; // UNDEFINED
4020 index = fieldFromInstruction(Insn, 5, 3);
4023 if (fieldFromInstruction(Insn, 4, 1))
4024 return MCDisassembler::Fail; // UNDEFINED
4025 index = fieldFromInstruction(Insn, 6, 2);
4026 if (fieldFromInstruction(Insn, 5, 1))
4030 if (fieldFromInstruction(Insn, 4, 2))
4031 return MCDisassembler::Fail; // UNDEFINED
4032 index = fieldFromInstruction(Insn, 7, 1);
4033 if (fieldFromInstruction(Insn, 6, 1))
4038 if (Rm != 0xF) { // Writeback
4039 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4040 return MCDisassembler::Fail;
4042 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4043 return MCDisassembler::Fail;
4044 Inst.addOperand(MCOperand::CreateImm(align));
4047 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4048 return MCDisassembler::Fail;
4050 Inst.addOperand(MCOperand::CreateReg(0));
4053 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4054 return MCDisassembler::Fail;
4055 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4056 return MCDisassembler::Fail;
4057 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4058 return MCDisassembler::Fail;
4059 Inst.addOperand(MCOperand::CreateImm(index));
4065 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4066 uint64_t Address, const void *Decoder) {
4067 DecodeStatus S = MCDisassembler::Success;
4069 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4070 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4071 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4072 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4073 unsigned size = fieldFromInstruction(Insn, 10, 2);
4080 return MCDisassembler::Fail;
4082 if (fieldFromInstruction(Insn, 4, 1))
4084 index = fieldFromInstruction(Insn, 5, 3);
4087 if (fieldFromInstruction(Insn, 4, 1))
4089 index = fieldFromInstruction(Insn, 6, 2);
4090 if (fieldFromInstruction(Insn, 5, 1))
4094 if (fieldFromInstruction(Insn, 4, 2))
4095 align = 4 << fieldFromInstruction(Insn, 4, 2);
4096 index = fieldFromInstruction(Insn, 7, 1);
4097 if (fieldFromInstruction(Insn, 6, 1))
4102 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4103 return MCDisassembler::Fail;
4104 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4105 return MCDisassembler::Fail;
4106 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4107 return MCDisassembler::Fail;
4108 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4109 return MCDisassembler::Fail;
4111 if (Rm != 0xF) { // Writeback
4112 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4113 return MCDisassembler::Fail;
4115 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4116 return MCDisassembler::Fail;
4117 Inst.addOperand(MCOperand::CreateImm(align));
4120 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4121 return MCDisassembler::Fail;
4123 Inst.addOperand(MCOperand::CreateReg(0));
4126 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4127 return MCDisassembler::Fail;
4128 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4129 return MCDisassembler::Fail;
4130 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4131 return MCDisassembler::Fail;
4132 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4133 return MCDisassembler::Fail;
4134 Inst.addOperand(MCOperand::CreateImm(index));
4139 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4140 uint64_t Address, const void *Decoder) {
4141 DecodeStatus S = MCDisassembler::Success;
4143 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4144 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4145 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4146 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4147 unsigned size = fieldFromInstruction(Insn, 10, 2);
4154 return MCDisassembler::Fail;
4156 if (fieldFromInstruction(Insn, 4, 1))
4158 index = fieldFromInstruction(Insn, 5, 3);
4161 if (fieldFromInstruction(Insn, 4, 1))
4163 index = fieldFromInstruction(Insn, 6, 2);
4164 if (fieldFromInstruction(Insn, 5, 1))
4168 if (fieldFromInstruction(Insn, 4, 2))
4169 align = 4 << fieldFromInstruction(Insn, 4, 2);
4170 index = fieldFromInstruction(Insn, 7, 1);
4171 if (fieldFromInstruction(Insn, 6, 1))
4176 if (Rm != 0xF) { // Writeback
4177 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4178 return MCDisassembler::Fail;
4180 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4181 return MCDisassembler::Fail;
4182 Inst.addOperand(MCOperand::CreateImm(align));
4185 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4186 return MCDisassembler::Fail;
4188 Inst.addOperand(MCOperand::CreateReg(0));
4191 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4192 return MCDisassembler::Fail;
4193 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4194 return MCDisassembler::Fail;
4195 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4196 return MCDisassembler::Fail;
4197 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4198 return MCDisassembler::Fail;
4199 Inst.addOperand(MCOperand::CreateImm(index));
4204 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4205 uint64_t Address, const void *Decoder) {
4206 DecodeStatus S = MCDisassembler::Success;
4207 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4208 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4209 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4210 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4211 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4213 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4214 S = MCDisassembler::SoftFail;
4216 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4217 return MCDisassembler::Fail;
4218 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4219 return MCDisassembler::Fail;
4220 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4221 return MCDisassembler::Fail;
4222 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4223 return MCDisassembler::Fail;
4224 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4225 return MCDisassembler::Fail;
4230 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4231 uint64_t Address, const void *Decoder) {
4232 DecodeStatus S = MCDisassembler::Success;
4233 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4234 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4235 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4236 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4237 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4239 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4240 S = MCDisassembler::SoftFail;
4242 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4243 return MCDisassembler::Fail;
4244 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4245 return MCDisassembler::Fail;
4246 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4247 return MCDisassembler::Fail;
4248 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4249 return MCDisassembler::Fail;
4250 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4251 return MCDisassembler::Fail;
4256 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4257 uint64_t Address, const void *Decoder) {
4258 DecodeStatus S = MCDisassembler::Success;
4259 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4260 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4264 S = MCDisassembler::SoftFail;
4269 S = MCDisassembler::SoftFail;
4272 Inst.addOperand(MCOperand::CreateImm(pred));
4273 Inst.addOperand(MCOperand::CreateImm(mask));
4278 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4279 uint64_t Address, const void *Decoder) {
4280 DecodeStatus S = MCDisassembler::Success;
4282 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4283 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4284 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4285 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4286 unsigned W = fieldFromInstruction(Insn, 21, 1);
4287 unsigned U = fieldFromInstruction(Insn, 23, 1);
4288 unsigned P = fieldFromInstruction(Insn, 24, 1);
4289 bool writeback = (W == 1) | (P == 0);
4291 addr |= (U << 8) | (Rn << 9);
4293 if (writeback && (Rn == Rt || Rn == Rt2))
4294 Check(S, MCDisassembler::SoftFail);
4296 Check(S, MCDisassembler::SoftFail);
4299 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4300 return MCDisassembler::Fail;
4302 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4303 return MCDisassembler::Fail;
4304 // Writeback operand
4305 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4306 return MCDisassembler::Fail;
4308 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4309 return MCDisassembler::Fail;
4315 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4316 uint64_t Address, const void *Decoder) {
4317 DecodeStatus S = MCDisassembler::Success;
4319 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4320 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4321 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4322 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4323 unsigned W = fieldFromInstruction(Insn, 21, 1);
4324 unsigned U = fieldFromInstruction(Insn, 23, 1);
4325 unsigned P = fieldFromInstruction(Insn, 24, 1);
4326 bool writeback = (W == 1) | (P == 0);
4328 addr |= (U << 8) | (Rn << 9);
4330 if (writeback && (Rn == Rt || Rn == Rt2))
4331 Check(S, MCDisassembler::SoftFail);
4333 // Writeback operand
4334 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4335 return MCDisassembler::Fail;
4337 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4338 return MCDisassembler::Fail;
4340 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4341 return MCDisassembler::Fail;
4343 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4344 return MCDisassembler::Fail;
4349 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4350 uint64_t Address, const void *Decoder) {
4351 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4352 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4353 if (sign1 != sign2) return MCDisassembler::Fail;
4355 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4356 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4357 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4359 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4361 return MCDisassembler::Success;
4364 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4366 const void *Decoder) {
4367 DecodeStatus S = MCDisassembler::Success;
4369 // Shift of "asr #32" is not allowed in Thumb2 mode.
4370 if (Val == 0x20) S = MCDisassembler::SoftFail;
4371 Inst.addOperand(MCOperand::CreateImm(Val));
4375 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4376 uint64_t Address, const void *Decoder) {
4377 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4378 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4379 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4380 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4383 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4385 DecodeStatus S = MCDisassembler::Success;
4387 if (Rt == Rn || Rn == Rt2)
4388 S = MCDisassembler::SoftFail;
4390 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4391 return MCDisassembler::Fail;
4392 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4393 return MCDisassembler::Fail;
4394 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4395 return MCDisassembler::Fail;
4396 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4397 return MCDisassembler::Fail;
4402 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4403 uint64_t Address, const void *Decoder) {
4404 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4405 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4406 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4407 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4408 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4409 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4411 DecodeStatus S = MCDisassembler::Success;
4413 // VMOVv2f32 is ambiguous with these decodings.
4414 if (!(imm & 0x38) && cmode == 0xF) {
4415 Inst.setOpcode(ARM::VMOVv2f32);
4416 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4419 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4421 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4422 return MCDisassembler::Fail;
4423 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4424 return MCDisassembler::Fail;
4425 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4430 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4431 uint64_t Address, const void *Decoder) {
4432 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4433 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4434 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4435 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4436 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4437 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4439 DecodeStatus S = MCDisassembler::Success;
4441 // VMOVv4f32 is ambiguous with these decodings.
4442 if (!(imm & 0x38) && cmode == 0xF) {
4443 Inst.setOpcode(ARM::VMOVv4f32);
4444 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4447 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4449 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4450 return MCDisassembler::Fail;
4451 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4452 return MCDisassembler::Fail;
4453 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4458 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4459 uint64_t Address, const void *Decoder) {
4460 DecodeStatus S = MCDisassembler::Success;
4462 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4463 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4464 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4465 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4466 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4468 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4469 S = MCDisassembler::SoftFail;
4471 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4472 return MCDisassembler::Fail;
4473 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4474 return MCDisassembler::Fail;
4475 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4476 return MCDisassembler::Fail;
4477 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4478 return MCDisassembler::Fail;
4479 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4480 return MCDisassembler::Fail;
4485 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4486 uint64_t Address, const void *Decoder) {
4488 DecodeStatus S = MCDisassembler::Success;
4490 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4491 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4492 unsigned cop = fieldFromInstruction(Val, 8, 4);
4493 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4494 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4496 if ((cop & ~0x1) == 0xa)
4497 return MCDisassembler::Fail;
4500 S = MCDisassembler::SoftFail;
4502 Inst.addOperand(MCOperand::CreateImm(cop));
4503 Inst.addOperand(MCOperand::CreateImm(opc1));
4504 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4505 return MCDisassembler::Fail;
4506 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4507 return MCDisassembler::Fail;
4508 Inst.addOperand(MCOperand::CreateImm(CRm));