1 //===-- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #define DEBUG_TYPE "arm-disassembler"
12 #include "llvm/MC/MCDisassembler.h"
13 #include "MCTargetDesc/ARMAddressingModes.h"
14 #include "MCTargetDesc/ARMBaseInfo.h"
15 #include "MCTargetDesc/ARMMCExpr.h"
16 #include "llvm/MC/MCContext.h"
17 #include "llvm/MC/MCExpr.h"
18 #include "llvm/MC/MCFixedLenDisassembler.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/MC/MCInstrDesc.h"
21 #include "llvm/MC/MCSubtargetInfo.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/LEB128.h"
25 #include "llvm/Support/MemoryObject.h"
26 #include "llvm/Support/TargetRegistry.h"
27 #include "llvm/Support/raw_ostream.h"
32 typedef MCDisassembler::DecodeStatus DecodeStatus;
35 // Handles the condition code status of instructions in IT blocks
39 // Returns the condition code for instruction in IT block
41 unsigned CC = ARMCC::AL;
47 // Advances the IT block state to the next T or E
48 void advanceITState() {
52 // Returns true if the current instruction is in an IT block
53 bool instrInITBlock() {
54 return !ITStates.empty();
57 // Returns true if current instruction is the last instruction in an IT block
58 bool instrLastInITBlock() {
59 return ITStates.size() == 1;
62 // Called when decoding an IT instruction. Sets the IT state for the following
63 // instructions that for the IT block. Firstcond and Mask correspond to the
64 // fields in the IT instruction encoding.
65 void setITState(char Firstcond, char Mask) {
66 // (3 - the number of trailing zeros) is the number of then / else.
67 unsigned CondBit0 = Firstcond & 1;
68 unsigned NumTZ = CountTrailingZeros_32(Mask);
69 unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf);
70 assert(NumTZ <= 3 && "Invalid IT mask!");
71 // push condition codes onto the stack the correct order for the pops
72 for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) {
73 bool T = ((Mask >> Pos) & 1) == CondBit0;
75 ITStates.push_back(CCBits);
77 ITStates.push_back(CCBits ^ 1);
79 ITStates.push_back(CCBits);
83 std::vector<unsigned char> ITStates;
88 /// ARMDisassembler - ARM disassembler for all ARM platforms.
89 class ARMDisassembler : public MCDisassembler {
91 /// Constructor - Initializes the disassembler.
93 ARMDisassembler(const MCSubtargetInfo &STI) :
100 /// getInstruction - See MCDisassembler.
101 DecodeStatus getInstruction(MCInst &instr,
103 const MemoryObject ®ion,
105 raw_ostream &vStream,
106 raw_ostream &cStream) const;
109 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
110 class ThumbDisassembler : public MCDisassembler {
112 /// Constructor - Initializes the disassembler.
114 ThumbDisassembler(const MCSubtargetInfo &STI) :
115 MCDisassembler(STI) {
118 ~ThumbDisassembler() {
121 /// getInstruction - See MCDisassembler.
122 DecodeStatus getInstruction(MCInst &instr,
124 const MemoryObject ®ion,
126 raw_ostream &vStream,
127 raw_ostream &cStream) const;
130 mutable ITStatus ITBlock;
131 DecodeStatus AddThumbPredicate(MCInst&) const;
132 void UpdateThumbVFPPredicate(MCInst&) const;
136 static bool Check(DecodeStatus &Out, DecodeStatus In) {
138 case MCDisassembler::Success:
139 // Out stays the same.
141 case MCDisassembler::SoftFail:
144 case MCDisassembler::Fail:
148 llvm_unreachable("Invalid DecodeStatus!");
152 // Forward declare these because the autogenerated code will reference them.
153 // Definitions are further down.
154 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
155 uint64_t Address, const void *Decoder);
156 static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
157 unsigned RegNo, uint64_t Address,
158 const void *Decoder);
159 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
160 uint64_t Address, const void *Decoder);
161 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
162 uint64_t Address, const void *Decoder);
163 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
164 uint64_t Address, const void *Decoder);
165 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
166 uint64_t Address, const void *Decoder);
167 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
168 uint64_t Address, const void *Decoder);
169 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
170 uint64_t Address, const void *Decoder);
171 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
174 const void *Decoder);
175 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
176 uint64_t Address, const void *Decoder);
177 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
178 uint64_t Address, const void *Decoder);
179 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
180 unsigned RegNo, uint64_t Address,
181 const void *Decoder);
183 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
184 uint64_t Address, const void *Decoder);
185 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
186 uint64_t Address, const void *Decoder);
187 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
188 uint64_t Address, const void *Decoder);
189 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
190 uint64_t Address, const void *Decoder);
191 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
192 uint64_t Address, const void *Decoder);
193 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
194 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
203 const void *Decoder);
204 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
205 uint64_t Address, const void *Decoder);
206 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
207 uint64_t Address, const void *Decoder);
208 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
209 uint64_t Address, const void *Decoder);
210 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
211 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
216 const void *Decoder);
217 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
218 uint64_t Address, const void *Decoder);
219 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
220 uint64_t Address, const void *Decoder);
221 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
222 uint64_t Address, const void *Decoder);
223 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
224 uint64_t Address, const void *Decoder);
225 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
226 uint64_t Address, const void *Decoder);
227 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
228 uint64_t Address, const void *Decoder);
229 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
230 uint64_t Address, const void *Decoder);
231 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
232 uint64_t Address, const void *Decoder);
233 static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
234 uint64_t Address, const void *Decoder);
235 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
236 uint64_t Address, const void *Decoder);
237 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
238 uint64_t Address, const void *Decoder);
239 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
240 uint64_t Address, const void *Decoder);
241 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
242 uint64_t Address, const void *Decoder);
243 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
244 uint64_t Address, const void *Decoder);
245 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
246 uint64_t Address, const void *Decoder);
247 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
248 uint64_t Address, const void *Decoder);
249 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
250 uint64_t Address, const void *Decoder);
251 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
252 uint64_t Address, const void *Decoder);
253 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
254 uint64_t Address, const void *Decoder);
255 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
256 uint64_t Address, const void *Decoder);
257 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
258 uint64_t Address, const void *Decoder);
259 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
260 uint64_t Address, const void *Decoder);
261 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
262 uint64_t Address, const void *Decoder);
263 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
264 uint64_t Address, const void *Decoder);
265 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
266 uint64_t Address, const void *Decoder);
267 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
268 uint64_t Address, const void *Decoder);
269 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
270 uint64_t Address, const void *Decoder);
271 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
272 uint64_t Address, const void *Decoder);
273 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
274 uint64_t Address, const void *Decoder);
275 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
276 uint64_t Address, const void *Decoder);
277 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
278 uint64_t Address, const void *Decoder);
279 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
280 uint64_t Address, const void *Decoder);
281 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
282 uint64_t Address, const void *Decoder);
283 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
284 uint64_t Address, const void *Decoder);
285 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
286 uint64_t Address, const void *Decoder);
287 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
288 uint64_t Address, const void *Decoder);
289 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
290 uint64_t Address, const void *Decoder);
291 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
292 uint64_t Address, const void *Decoder);
293 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
294 uint64_t Address, const void *Decoder);
295 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
296 uint64_t Address, const void *Decoder);
297 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
298 uint64_t Address, const void *Decoder);
299 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
300 uint64_t Address, const void *Decoder);
301 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
302 uint64_t Address, const void *Decoder);
303 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
304 uint64_t Address, const void *Decoder);
305 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
306 uint64_t Address, const void *Decoder);
307 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
308 uint64_t Address, const void *Decoder);
309 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
310 uint64_t Address, const void *Decoder);
313 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
314 uint64_t Address, const void *Decoder);
315 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
316 uint64_t Address, const void *Decoder);
317 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
318 uint64_t Address, const void *Decoder);
319 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
320 uint64_t Address, const void *Decoder);
321 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
322 uint64_t Address, const void *Decoder);
323 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
324 uint64_t Address, const void *Decoder);
325 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
326 uint64_t Address, const void *Decoder);
327 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
328 uint64_t Address, const void *Decoder);
329 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
330 uint64_t Address, const void *Decoder);
331 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
332 uint64_t Address, const void *Decoder);
333 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
334 uint64_t Address, const void *Decoder);
335 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
336 uint64_t Address, const void *Decoder);
337 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
338 uint64_t Address, const void *Decoder);
339 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
340 uint64_t Address, const void *Decoder);
341 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
342 uint64_t Address, const void *Decoder);
343 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
344 uint64_t Address, const void *Decoder);
345 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
346 uint64_t Address, const void *Decoder);
347 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
348 uint64_t Address, const void *Decoder);
349 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
350 uint64_t Address, const void *Decoder);
351 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
352 uint64_t Address, const void *Decoder);
353 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
354 uint64_t Address, const void *Decoder);
355 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
356 uint64_t Address, const void *Decoder);
357 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
358 uint64_t Address, const void *Decoder);
359 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
360 uint64_t Address, const void *Decoder);
361 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
362 uint64_t Address, const void *Decoder);
363 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
364 uint64_t Address, const void *Decoder);
365 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
366 uint64_t Address, const void *Decoder);
367 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
368 uint64_t Address, const void *Decoder);
369 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
370 uint64_t Address, const void *Decoder);
371 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
372 uint64_t Address, const void *Decoder);
373 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
374 uint64_t Address, const void *Decoder);
376 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
377 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
379 uint64_t Address, const void *Decoder);
380 #include "ARMGenDisassemblerTables.inc"
382 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
383 return new ARMDisassembler(STI);
386 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
387 return new ThumbDisassembler(STI);
390 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
391 const MemoryObject &Region,
394 raw_ostream &cs) const {
399 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
400 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
402 // We want to read exactly 4 bytes of data.
403 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
405 return MCDisassembler::Fail;
408 // Encoded as a small-endian 32-bit word in the stream.
409 uint32_t insn = (bytes[3] << 24) |
414 // Calling the auto-generated decoder function.
415 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
417 if (result != MCDisassembler::Fail) {
422 // VFP and NEON instructions, similarly, are shared between ARM
425 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
426 if (result != MCDisassembler::Fail) {
432 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
434 if (result != MCDisassembler::Fail) {
436 // Add a fake predicate operand, because we share these instruction
437 // definitions with Thumb2 where these instructions are predicable.
438 if (!DecodePredicateOperand(MI, 0xE, Address, this))
439 return MCDisassembler::Fail;
444 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
446 if (result != MCDisassembler::Fail) {
448 // Add a fake predicate operand, because we share these instruction
449 // definitions with Thumb2 where these instructions are predicable.
450 if (!DecodePredicateOperand(MI, 0xE, Address, this))
451 return MCDisassembler::Fail;
456 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
458 if (result != MCDisassembler::Fail) {
460 // Add a fake predicate operand, because we share these instruction
461 // definitions with Thumb2 where these instructions are predicable.
462 if (!DecodePredicateOperand(MI, 0xE, Address, this))
463 return MCDisassembler::Fail;
470 return MCDisassembler::Fail;
474 extern const MCInstrDesc ARMInsts[];
477 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
478 /// immediate Value in the MCInst. The immediate Value has had any PC
479 /// adjustment made by the caller. If the instruction is a branch instruction
480 /// then isBranch is true, else false. If the getOpInfo() function was set as
481 /// part of the setupForSymbolicDisassembly() call then that function is called
482 /// to get any symbolic information at the Address for this instruction. If
483 /// that returns non-zero then the symbolic information it returns is used to
484 /// create an MCExpr and that is added as an operand to the MCInst. If
485 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
486 /// Value is done and if a symbol is found an MCExpr is created with that, else
487 /// an MCExpr with Value is created. This function returns true if it adds an
488 /// operand to the MCInst and false otherwise.
489 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
490 bool isBranch, uint64_t InstSize,
491 MCInst &MI, const void *Decoder) {
492 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
493 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
494 struct LLVMOpInfo1 SymbolicOp;
495 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
496 SymbolicOp.Value = Value;
497 void *DisInfo = Dis->getDisInfoBlock();
500 !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
501 // Clear SymbolicOp.Value from above and also all other fields.
502 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
503 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
506 uint64_t ReferenceType;
508 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
510 ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
511 const char *ReferenceName;
512 uint64_t SymbolValue = 0x00000000ffffffffULL & Value;
513 const char *Name = SymbolLookUp(DisInfo, SymbolValue, &ReferenceType,
514 Address, &ReferenceName);
516 SymbolicOp.AddSymbol.Name = Name;
517 SymbolicOp.AddSymbol.Present = true;
519 // For branches always create an MCExpr so it gets printed as hex address.
521 SymbolicOp.Value = Value;
523 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
524 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
525 if (!Name && !isBranch)
529 MCContext *Ctx = Dis->getMCContext();
530 const MCExpr *Add = NULL;
531 if (SymbolicOp.AddSymbol.Present) {
532 if (SymbolicOp.AddSymbol.Name) {
533 StringRef Name(SymbolicOp.AddSymbol.Name);
534 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
535 Add = MCSymbolRefExpr::Create(Sym, *Ctx);
537 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
541 const MCExpr *Sub = NULL;
542 if (SymbolicOp.SubtractSymbol.Present) {
543 if (SymbolicOp.SubtractSymbol.Name) {
544 StringRef Name(SymbolicOp.SubtractSymbol.Name);
545 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
546 Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
548 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
552 const MCExpr *Off = NULL;
553 if (SymbolicOp.Value != 0)
554 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
560 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
562 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
564 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
569 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
576 Expr = MCConstantExpr::Create(0, *Ctx);
579 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
580 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
581 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
582 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
583 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
584 MI.addOperand(MCOperand::CreateExpr(Expr));
586 llvm_unreachable("bad SymbolicOp.VariantKind");
591 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
592 /// referenced by a load instruction with the base register that is the Pc.
593 /// These can often be values in a literal pool near the Address of the
594 /// instruction. The Address of the instruction and its immediate Value are
595 /// used as a possible literal pool entry. The SymbolLookUp call back will
596 /// return the name of a symbol referenced by the literal pool's entry if
597 /// the referenced address is that of a symbol. Or it will return a pointer to
598 /// a literal 'C' string if the referenced address of the literal pool's entry
599 /// is an address into a section with 'C' string literals.
600 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
601 const void *Decoder) {
602 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
603 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
605 void *DisInfo = Dis->getDisInfoBlock();
606 uint64_t ReferenceType;
607 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
608 const char *ReferenceName;
609 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
610 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
611 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
612 (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
616 // Thumb1 instructions don't have explicit S bits. Rather, they
617 // implicitly set CPSR. Since it's not represented in the encoding, the
618 // auto-generated decoder won't inject the CPSR operand. We need to fix
619 // that as a post-pass.
620 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
621 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
622 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
623 MCInst::iterator I = MI.begin();
624 for (unsigned i = 0; i < NumOps; ++i, ++I) {
625 if (I == MI.end()) break;
626 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
627 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
628 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
633 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
636 // Most Thumb instructions don't have explicit predicates in the
637 // encoding, but rather get their predicates from IT context. We need
638 // to fix up the predicate operands using this context information as a
640 MCDisassembler::DecodeStatus
641 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
642 MCDisassembler::DecodeStatus S = Success;
644 // A few instructions actually have predicates encoded in them. Don't
645 // try to overwrite it if we're seeing one of those.
646 switch (MI.getOpcode()) {
657 // Some instructions (mostly conditional branches) are not
658 // allowed in IT blocks.
659 if (ITBlock.instrInITBlock())
668 // Some instructions (mostly unconditional branches) can
669 // only appears at the end of, or outside of, an IT.
670 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
677 // If we're in an IT block, base the predicate on that. Otherwise,
678 // assume a predicate of AL.
680 CC = ITBlock.getITCC();
683 if (ITBlock.instrInITBlock())
684 ITBlock.advanceITState();
686 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
687 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
688 MCInst::iterator I = MI.begin();
689 for (unsigned i = 0; i < NumOps; ++i, ++I) {
690 if (I == MI.end()) break;
691 if (OpInfo[i].isPredicate()) {
692 I = MI.insert(I, MCOperand::CreateImm(CC));
695 MI.insert(I, MCOperand::CreateReg(0));
697 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
702 I = MI.insert(I, MCOperand::CreateImm(CC));
705 MI.insert(I, MCOperand::CreateReg(0));
707 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
712 // Thumb VFP instructions are a special case. Because we share their
713 // encodings between ARM and Thumb modes, and they are predicable in ARM
714 // mode, the auto-generated decoder will give them an (incorrect)
715 // predicate operand. We need to rewrite these operands based on the IT
716 // context as a post-pass.
717 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
719 CC = ITBlock.getITCC();
720 if (ITBlock.instrInITBlock())
721 ITBlock.advanceITState();
723 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
724 MCInst::iterator I = MI.begin();
725 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
726 for (unsigned i = 0; i < NumOps; ++i, ++I) {
727 if (OpInfo[i].isPredicate() ) {
733 I->setReg(ARM::CPSR);
739 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
740 const MemoryObject &Region,
743 raw_ostream &cs) const {
748 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
749 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
751 // We want to read exactly 2 bytes of data.
752 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
754 return MCDisassembler::Fail;
757 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
758 DecodeStatus result = decodeInstruction(DecoderTableThumb16, MI, insn16,
760 if (result != MCDisassembler::Fail) {
762 Check(result, AddThumbPredicate(MI));
767 result = decodeInstruction(DecoderTableThumbSBit16, MI, insn16,
771 bool InITBlock = ITBlock.instrInITBlock();
772 Check(result, AddThumbPredicate(MI));
773 AddThumb1SBit(MI, InITBlock);
778 result = decodeInstruction(DecoderTableThumb216, MI, insn16,
780 if (result != MCDisassembler::Fail) {
783 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
784 // the Thumb predicate.
785 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
786 result = MCDisassembler::SoftFail;
788 Check(result, AddThumbPredicate(MI));
790 // If we find an IT instruction, we need to parse its condition
791 // code and mask operands so that we can apply them correctly
792 // to the subsequent instructions.
793 if (MI.getOpcode() == ARM::t2IT) {
795 unsigned Firstcond = MI.getOperand(0).getImm();
796 unsigned Mask = MI.getOperand(1).getImm();
797 ITBlock.setITState(Firstcond, Mask);
803 // We want to read exactly 4 bytes of data.
804 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
806 return MCDisassembler::Fail;
809 uint32_t insn32 = (bytes[3] << 8) |
814 result = decodeInstruction(DecoderTableThumb32, MI, insn32, Address,
816 if (result != MCDisassembler::Fail) {
818 bool InITBlock = ITBlock.instrInITBlock();
819 Check(result, AddThumbPredicate(MI));
820 AddThumb1SBit(MI, InITBlock);
825 result = decodeInstruction(DecoderTableThumb232, MI, insn32, Address,
827 if (result != MCDisassembler::Fail) {
829 Check(result, AddThumbPredicate(MI));
834 result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
835 if (result != MCDisassembler::Fail) {
837 UpdateThumbVFPPredicate(MI);
842 result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
844 if (result != MCDisassembler::Fail) {
846 Check(result, AddThumbPredicate(MI));
850 if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
852 uint32_t NEONLdStInsn = insn32;
853 NEONLdStInsn &= 0xF0FFFFFF;
854 NEONLdStInsn |= 0x04000000;
855 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
857 if (result != MCDisassembler::Fail) {
859 Check(result, AddThumbPredicate(MI));
864 if (fieldFromInstruction(insn32, 24, 4) == 0xF) {
866 uint32_t NEONDataInsn = insn32;
867 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
868 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
869 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
870 result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
872 if (result != MCDisassembler::Fail) {
874 Check(result, AddThumbPredicate(MI));
880 return MCDisassembler::Fail;
884 extern "C" void LLVMInitializeARMDisassembler() {
885 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
886 createARMDisassembler);
887 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
888 createThumbDisassembler);
891 static const uint16_t GPRDecoderTable[] = {
892 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
893 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
894 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
895 ARM::R12, ARM::SP, ARM::LR, ARM::PC
898 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
899 uint64_t Address, const void *Decoder) {
901 return MCDisassembler::Fail;
903 unsigned Register = GPRDecoderTable[RegNo];
904 Inst.addOperand(MCOperand::CreateReg(Register));
905 return MCDisassembler::Success;
909 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
910 uint64_t Address, const void *Decoder) {
911 DecodeStatus S = MCDisassembler::Success;
914 S = MCDisassembler::SoftFail;
916 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
921 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
922 uint64_t Address, const void *Decoder) {
924 return MCDisassembler::Fail;
925 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
928 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
929 uint64_t Address, const void *Decoder) {
930 unsigned Register = 0;
951 return MCDisassembler::Fail;
954 Inst.addOperand(MCOperand::CreateReg(Register));
955 return MCDisassembler::Success;
958 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
959 uint64_t Address, const void *Decoder) {
960 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
961 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
964 static const uint16_t SPRDecoderTable[] = {
965 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
966 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
967 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
968 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
969 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
970 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
971 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
972 ARM::S28, ARM::S29, ARM::S30, ARM::S31
975 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
976 uint64_t Address, const void *Decoder) {
978 return MCDisassembler::Fail;
980 unsigned Register = SPRDecoderTable[RegNo];
981 Inst.addOperand(MCOperand::CreateReg(Register));
982 return MCDisassembler::Success;
985 static const uint16_t DPRDecoderTable[] = {
986 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
987 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
988 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
989 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
990 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
991 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
992 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
993 ARM::D28, ARM::D29, ARM::D30, ARM::D31
996 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
997 uint64_t Address, const void *Decoder) {
999 return MCDisassembler::Fail;
1001 unsigned Register = DPRDecoderTable[RegNo];
1002 Inst.addOperand(MCOperand::CreateReg(Register));
1003 return MCDisassembler::Success;
1006 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1007 uint64_t Address, const void *Decoder) {
1009 return MCDisassembler::Fail;
1010 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1014 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
1015 uint64_t Address, const void *Decoder) {
1017 return MCDisassembler::Fail;
1018 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1021 static const uint16_t QPRDecoderTable[] = {
1022 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1023 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1024 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1025 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1029 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1030 uint64_t Address, const void *Decoder) {
1032 return MCDisassembler::Fail;
1035 unsigned Register = QPRDecoderTable[RegNo];
1036 Inst.addOperand(MCOperand::CreateReg(Register));
1037 return MCDisassembler::Success;
1040 static const uint16_t DPairDecoderTable[] = {
1041 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1042 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1043 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1044 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1045 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1049 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1050 uint64_t Address, const void *Decoder) {
1052 return MCDisassembler::Fail;
1054 unsigned Register = DPairDecoderTable[RegNo];
1055 Inst.addOperand(MCOperand::CreateReg(Register));
1056 return MCDisassembler::Success;
1059 static const uint16_t DPairSpacedDecoderTable[] = {
1060 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1061 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1062 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1063 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1064 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1065 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1066 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1067 ARM::D28_D30, ARM::D29_D31
1070 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1073 const void *Decoder) {
1075 return MCDisassembler::Fail;
1077 unsigned Register = DPairSpacedDecoderTable[RegNo];
1078 Inst.addOperand(MCOperand::CreateReg(Register));
1079 return MCDisassembler::Success;
1082 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1083 uint64_t Address, const void *Decoder) {
1084 if (Val == 0xF) return MCDisassembler::Fail;
1085 // AL predicate is not allowed on Thumb1 branches.
1086 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1087 return MCDisassembler::Fail;
1088 Inst.addOperand(MCOperand::CreateImm(Val));
1089 if (Val == ARMCC::AL) {
1090 Inst.addOperand(MCOperand::CreateReg(0));
1092 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1093 return MCDisassembler::Success;
1096 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1097 uint64_t Address, const void *Decoder) {
1099 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1101 Inst.addOperand(MCOperand::CreateReg(0));
1102 return MCDisassembler::Success;
1105 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1106 uint64_t Address, const void *Decoder) {
1107 uint32_t imm = Val & 0xFF;
1108 uint32_t rot = (Val & 0xF00) >> 7;
1109 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1110 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1111 return MCDisassembler::Success;
1114 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1115 uint64_t Address, const void *Decoder) {
1116 DecodeStatus S = MCDisassembler::Success;
1118 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1119 unsigned type = fieldFromInstruction(Val, 5, 2);
1120 unsigned imm = fieldFromInstruction(Val, 7, 5);
1122 // Register-immediate
1123 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1124 return MCDisassembler::Fail;
1126 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1129 Shift = ARM_AM::lsl;
1132 Shift = ARM_AM::lsr;
1135 Shift = ARM_AM::asr;
1138 Shift = ARM_AM::ror;
1142 if (Shift == ARM_AM::ror && imm == 0)
1143 Shift = ARM_AM::rrx;
1145 unsigned Op = Shift | (imm << 3);
1146 Inst.addOperand(MCOperand::CreateImm(Op));
1151 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1152 uint64_t Address, const void *Decoder) {
1153 DecodeStatus S = MCDisassembler::Success;
1155 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1156 unsigned type = fieldFromInstruction(Val, 5, 2);
1157 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1159 // Register-register
1160 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1161 return MCDisassembler::Fail;
1162 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1163 return MCDisassembler::Fail;
1165 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1168 Shift = ARM_AM::lsl;
1171 Shift = ARM_AM::lsr;
1174 Shift = ARM_AM::asr;
1177 Shift = ARM_AM::ror;
1181 Inst.addOperand(MCOperand::CreateImm(Shift));
1186 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1187 uint64_t Address, const void *Decoder) {
1188 DecodeStatus S = MCDisassembler::Success;
1190 bool writebackLoad = false;
1191 unsigned writebackReg = 0;
1192 switch (Inst.getOpcode()) {
1195 case ARM::LDMIA_UPD:
1196 case ARM::LDMDB_UPD:
1197 case ARM::LDMIB_UPD:
1198 case ARM::LDMDA_UPD:
1199 case ARM::t2LDMIA_UPD:
1200 case ARM::t2LDMDB_UPD:
1201 writebackLoad = true;
1202 writebackReg = Inst.getOperand(0).getReg();
1206 // Empty register lists are not allowed.
1207 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1208 for (unsigned i = 0; i < 16; ++i) {
1209 if (Val & (1 << i)) {
1210 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1211 return MCDisassembler::Fail;
1212 // Writeback not allowed if Rn is in the target list.
1213 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1214 Check(S, MCDisassembler::SoftFail);
1221 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1222 uint64_t Address, const void *Decoder) {
1223 DecodeStatus S = MCDisassembler::Success;
1225 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1226 unsigned regs = fieldFromInstruction(Val, 0, 8);
1228 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1229 return MCDisassembler::Fail;
1230 for (unsigned i = 0; i < (regs - 1); ++i) {
1231 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1232 return MCDisassembler::Fail;
1238 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1239 uint64_t Address, const void *Decoder) {
1240 DecodeStatus S = MCDisassembler::Success;
1242 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1243 unsigned regs = fieldFromInstruction(Val, 0, 8);
1247 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1248 return MCDisassembler::Fail;
1249 for (unsigned i = 0; i < (regs - 1); ++i) {
1250 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1251 return MCDisassembler::Fail;
1257 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1258 uint64_t Address, const void *Decoder) {
1259 // This operand encodes a mask of contiguous zeros between a specified MSB
1260 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1261 // the mask of all bits LSB-and-lower, and then xor them to create
1262 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1263 // create the final mask.
1264 unsigned msb = fieldFromInstruction(Val, 5, 5);
1265 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1267 DecodeStatus S = MCDisassembler::Success;
1269 Check(S, MCDisassembler::SoftFail);
1270 // The check above will cause the warning for the "potentially undefined
1271 // instruction encoding" but we can't build a bad MCOperand value here
1272 // with a lsb > msb or else printing the MCInst will cause a crash.
1276 uint32_t msb_mask = 0xFFFFFFFF;
1277 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1278 uint32_t lsb_mask = (1U << lsb) - 1;
1280 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1284 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1285 uint64_t Address, const void *Decoder) {
1286 DecodeStatus S = MCDisassembler::Success;
1288 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1289 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1290 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1291 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1292 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1293 unsigned U = fieldFromInstruction(Insn, 23, 1);
1295 switch (Inst.getOpcode()) {
1296 case ARM::LDC_OFFSET:
1299 case ARM::LDC_OPTION:
1300 case ARM::LDCL_OFFSET:
1302 case ARM::LDCL_POST:
1303 case ARM::LDCL_OPTION:
1304 case ARM::STC_OFFSET:
1307 case ARM::STC_OPTION:
1308 case ARM::STCL_OFFSET:
1310 case ARM::STCL_POST:
1311 case ARM::STCL_OPTION:
1312 case ARM::t2LDC_OFFSET:
1313 case ARM::t2LDC_PRE:
1314 case ARM::t2LDC_POST:
1315 case ARM::t2LDC_OPTION:
1316 case ARM::t2LDCL_OFFSET:
1317 case ARM::t2LDCL_PRE:
1318 case ARM::t2LDCL_POST:
1319 case ARM::t2LDCL_OPTION:
1320 case ARM::t2STC_OFFSET:
1321 case ARM::t2STC_PRE:
1322 case ARM::t2STC_POST:
1323 case ARM::t2STC_OPTION:
1324 case ARM::t2STCL_OFFSET:
1325 case ARM::t2STCL_PRE:
1326 case ARM::t2STCL_POST:
1327 case ARM::t2STCL_OPTION:
1328 if (coproc == 0xA || coproc == 0xB)
1329 return MCDisassembler::Fail;
1335 Inst.addOperand(MCOperand::CreateImm(coproc));
1336 Inst.addOperand(MCOperand::CreateImm(CRd));
1337 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1338 return MCDisassembler::Fail;
1340 switch (Inst.getOpcode()) {
1341 case ARM::t2LDC2_OFFSET:
1342 case ARM::t2LDC2L_OFFSET:
1343 case ARM::t2LDC2_PRE:
1344 case ARM::t2LDC2L_PRE:
1345 case ARM::t2STC2_OFFSET:
1346 case ARM::t2STC2L_OFFSET:
1347 case ARM::t2STC2_PRE:
1348 case ARM::t2STC2L_PRE:
1349 case ARM::LDC2_OFFSET:
1350 case ARM::LDC2L_OFFSET:
1352 case ARM::LDC2L_PRE:
1353 case ARM::STC2_OFFSET:
1354 case ARM::STC2L_OFFSET:
1356 case ARM::STC2L_PRE:
1357 case ARM::t2LDC_OFFSET:
1358 case ARM::t2LDCL_OFFSET:
1359 case ARM::t2LDC_PRE:
1360 case ARM::t2LDCL_PRE:
1361 case ARM::t2STC_OFFSET:
1362 case ARM::t2STCL_OFFSET:
1363 case ARM::t2STC_PRE:
1364 case ARM::t2STCL_PRE:
1365 case ARM::LDC_OFFSET:
1366 case ARM::LDCL_OFFSET:
1369 case ARM::STC_OFFSET:
1370 case ARM::STCL_OFFSET:
1373 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1374 Inst.addOperand(MCOperand::CreateImm(imm));
1376 case ARM::t2LDC2_POST:
1377 case ARM::t2LDC2L_POST:
1378 case ARM::t2STC2_POST:
1379 case ARM::t2STC2L_POST:
1380 case ARM::LDC2_POST:
1381 case ARM::LDC2L_POST:
1382 case ARM::STC2_POST:
1383 case ARM::STC2L_POST:
1384 case ARM::t2LDC_POST:
1385 case ARM::t2LDCL_POST:
1386 case ARM::t2STC_POST:
1387 case ARM::t2STCL_POST:
1389 case ARM::LDCL_POST:
1391 case ARM::STCL_POST:
1395 // The 'option' variant doesn't encode 'U' in the immediate since
1396 // the immediate is unsigned [0,255].
1397 Inst.addOperand(MCOperand::CreateImm(imm));
1401 switch (Inst.getOpcode()) {
1402 case ARM::LDC_OFFSET:
1405 case ARM::LDC_OPTION:
1406 case ARM::LDCL_OFFSET:
1408 case ARM::LDCL_POST:
1409 case ARM::LDCL_OPTION:
1410 case ARM::STC_OFFSET:
1413 case ARM::STC_OPTION:
1414 case ARM::STCL_OFFSET:
1416 case ARM::STCL_POST:
1417 case ARM::STCL_OPTION:
1418 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1419 return MCDisassembler::Fail;
1429 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1430 uint64_t Address, const void *Decoder) {
1431 DecodeStatus S = MCDisassembler::Success;
1433 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1434 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1435 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1436 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1437 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1438 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1439 unsigned P = fieldFromInstruction(Insn, 24, 1);
1440 unsigned W = fieldFromInstruction(Insn, 21, 1);
1442 // On stores, the writeback operand precedes Rt.
1443 switch (Inst.getOpcode()) {
1444 case ARM::STR_POST_IMM:
1445 case ARM::STR_POST_REG:
1446 case ARM::STRB_POST_IMM:
1447 case ARM::STRB_POST_REG:
1448 case ARM::STRT_POST_REG:
1449 case ARM::STRT_POST_IMM:
1450 case ARM::STRBT_POST_REG:
1451 case ARM::STRBT_POST_IMM:
1452 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1453 return MCDisassembler::Fail;
1459 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1460 return MCDisassembler::Fail;
1462 // On loads, the writeback operand comes after Rt.
1463 switch (Inst.getOpcode()) {
1464 case ARM::LDR_POST_IMM:
1465 case ARM::LDR_POST_REG:
1466 case ARM::LDRB_POST_IMM:
1467 case ARM::LDRB_POST_REG:
1468 case ARM::LDRBT_POST_REG:
1469 case ARM::LDRBT_POST_IMM:
1470 case ARM::LDRT_POST_REG:
1471 case ARM::LDRT_POST_IMM:
1472 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1473 return MCDisassembler::Fail;
1479 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1480 return MCDisassembler::Fail;
1482 ARM_AM::AddrOpc Op = ARM_AM::add;
1483 if (!fieldFromInstruction(Insn, 23, 1))
1486 bool writeback = (P == 0) || (W == 1);
1487 unsigned idx_mode = 0;
1489 idx_mode = ARMII::IndexModePre;
1490 else if (!P && writeback)
1491 idx_mode = ARMII::IndexModePost;
1493 if (writeback && (Rn == 15 || Rn == Rt))
1494 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1497 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1498 return MCDisassembler::Fail;
1499 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1500 switch( fieldFromInstruction(Insn, 5, 2)) {
1514 return MCDisassembler::Fail;
1516 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1517 if (Opc == ARM_AM::ror && amt == 0)
1519 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1521 Inst.addOperand(MCOperand::CreateImm(imm));
1523 Inst.addOperand(MCOperand::CreateReg(0));
1524 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1525 Inst.addOperand(MCOperand::CreateImm(tmp));
1528 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1529 return MCDisassembler::Fail;
1534 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1535 uint64_t Address, const void *Decoder) {
1536 DecodeStatus S = MCDisassembler::Success;
1538 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1539 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1540 unsigned type = fieldFromInstruction(Val, 5, 2);
1541 unsigned imm = fieldFromInstruction(Val, 7, 5);
1542 unsigned U = fieldFromInstruction(Val, 12, 1);
1544 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1560 if (ShOp == ARM_AM::ror && imm == 0)
1563 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1564 return MCDisassembler::Fail;
1565 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1566 return MCDisassembler::Fail;
1569 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1571 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1572 Inst.addOperand(MCOperand::CreateImm(shift));
1578 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1579 uint64_t Address, const void *Decoder) {
1580 DecodeStatus S = MCDisassembler::Success;
1582 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1583 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1584 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1585 unsigned type = fieldFromInstruction(Insn, 22, 1);
1586 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1587 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1588 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1589 unsigned W = fieldFromInstruction(Insn, 21, 1);
1590 unsigned P = fieldFromInstruction(Insn, 24, 1);
1591 unsigned Rt2 = Rt + 1;
1593 bool writeback = (W == 1) | (P == 0);
1595 // For {LD,ST}RD, Rt must be even, else undefined.
1596 switch (Inst.getOpcode()) {
1599 case ARM::STRD_POST:
1602 case ARM::LDRD_POST:
1603 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1608 switch (Inst.getOpcode()) {
1611 case ARM::STRD_POST:
1612 if (P == 0 && W == 1)
1613 S = MCDisassembler::SoftFail;
1615 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1616 S = MCDisassembler::SoftFail;
1617 if (type && Rm == 15)
1618 S = MCDisassembler::SoftFail;
1620 S = MCDisassembler::SoftFail;
1621 if (!type && fieldFromInstruction(Insn, 8, 4))
1622 S = MCDisassembler::SoftFail;
1626 case ARM::STRH_POST:
1628 S = MCDisassembler::SoftFail;
1629 if (writeback && (Rn == 15 || Rn == Rt))
1630 S = MCDisassembler::SoftFail;
1631 if (!type && Rm == 15)
1632 S = MCDisassembler::SoftFail;
1636 case ARM::LDRD_POST:
1637 if (type && Rn == 15){
1639 S = MCDisassembler::SoftFail;
1642 if (P == 0 && W == 1)
1643 S = MCDisassembler::SoftFail;
1644 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1645 S = MCDisassembler::SoftFail;
1646 if (!type && writeback && Rn == 15)
1647 S = MCDisassembler::SoftFail;
1648 if (writeback && (Rn == Rt || Rn == Rt2))
1649 S = MCDisassembler::SoftFail;
1653 case ARM::LDRH_POST:
1654 if (type && Rn == 15){
1656 S = MCDisassembler::SoftFail;
1660 S = MCDisassembler::SoftFail;
1661 if (!type && Rm == 15)
1662 S = MCDisassembler::SoftFail;
1663 if (!type && writeback && (Rn == 15 || Rn == Rt))
1664 S = MCDisassembler::SoftFail;
1667 case ARM::LDRSH_PRE:
1668 case ARM::LDRSH_POST:
1670 case ARM::LDRSB_PRE:
1671 case ARM::LDRSB_POST:
1672 if (type && Rn == 15){
1674 S = MCDisassembler::SoftFail;
1677 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1678 S = MCDisassembler::SoftFail;
1679 if (!type && (Rt == 15 || Rm == 15))
1680 S = MCDisassembler::SoftFail;
1681 if (!type && writeback && (Rn == 15 || Rn == Rt))
1682 S = MCDisassembler::SoftFail;
1688 if (writeback) { // Writeback
1690 U |= ARMII::IndexModePre << 9;
1692 U |= ARMII::IndexModePost << 9;
1694 // On stores, the writeback operand precedes Rt.
1695 switch (Inst.getOpcode()) {
1698 case ARM::STRD_POST:
1701 case ARM::STRH_POST:
1702 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1703 return MCDisassembler::Fail;
1710 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1711 return MCDisassembler::Fail;
1712 switch (Inst.getOpcode()) {
1715 case ARM::STRD_POST:
1718 case ARM::LDRD_POST:
1719 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1720 return MCDisassembler::Fail;
1727 // On loads, the writeback operand comes after Rt.
1728 switch (Inst.getOpcode()) {
1731 case ARM::LDRD_POST:
1734 case ARM::LDRH_POST:
1736 case ARM::LDRSH_PRE:
1737 case ARM::LDRSH_POST:
1739 case ARM::LDRSB_PRE:
1740 case ARM::LDRSB_POST:
1743 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1744 return MCDisassembler::Fail;
1751 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1752 return MCDisassembler::Fail;
1755 Inst.addOperand(MCOperand::CreateReg(0));
1756 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1758 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1759 return MCDisassembler::Fail;
1760 Inst.addOperand(MCOperand::CreateImm(U));
1763 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1764 return MCDisassembler::Fail;
1769 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1770 uint64_t Address, const void *Decoder) {
1771 DecodeStatus S = MCDisassembler::Success;
1773 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1774 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1791 Inst.addOperand(MCOperand::CreateImm(mode));
1792 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1793 return MCDisassembler::Fail;
1798 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1800 uint64_t Address, const void *Decoder) {
1801 DecodeStatus S = MCDisassembler::Success;
1803 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1804 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1805 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1808 switch (Inst.getOpcode()) {
1810 Inst.setOpcode(ARM::RFEDA);
1812 case ARM::LDMDA_UPD:
1813 Inst.setOpcode(ARM::RFEDA_UPD);
1816 Inst.setOpcode(ARM::RFEDB);
1818 case ARM::LDMDB_UPD:
1819 Inst.setOpcode(ARM::RFEDB_UPD);
1822 Inst.setOpcode(ARM::RFEIA);
1824 case ARM::LDMIA_UPD:
1825 Inst.setOpcode(ARM::RFEIA_UPD);
1828 Inst.setOpcode(ARM::RFEIB);
1830 case ARM::LDMIB_UPD:
1831 Inst.setOpcode(ARM::RFEIB_UPD);
1834 Inst.setOpcode(ARM::SRSDA);
1836 case ARM::STMDA_UPD:
1837 Inst.setOpcode(ARM::SRSDA_UPD);
1840 Inst.setOpcode(ARM::SRSDB);
1842 case ARM::STMDB_UPD:
1843 Inst.setOpcode(ARM::SRSDB_UPD);
1846 Inst.setOpcode(ARM::SRSIA);
1848 case ARM::STMIA_UPD:
1849 Inst.setOpcode(ARM::SRSIA_UPD);
1852 Inst.setOpcode(ARM::SRSIB);
1854 case ARM::STMIB_UPD:
1855 Inst.setOpcode(ARM::SRSIB_UPD);
1858 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1861 // For stores (which become SRS's, the only operand is the mode.
1862 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1864 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1868 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1871 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1872 return MCDisassembler::Fail;
1873 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1874 return MCDisassembler::Fail; // Tied
1875 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1876 return MCDisassembler::Fail;
1877 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1878 return MCDisassembler::Fail;
1883 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1884 uint64_t Address, const void *Decoder) {
1885 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1886 unsigned M = fieldFromInstruction(Insn, 17, 1);
1887 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1888 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1890 DecodeStatus S = MCDisassembler::Success;
1892 // imod == '01' --> UNPREDICTABLE
1893 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1894 // return failure here. The '01' imod value is unprintable, so there's
1895 // nothing useful we could do even if we returned UNPREDICTABLE.
1897 if (imod == 1) return MCDisassembler::Fail;
1900 Inst.setOpcode(ARM::CPS3p);
1901 Inst.addOperand(MCOperand::CreateImm(imod));
1902 Inst.addOperand(MCOperand::CreateImm(iflags));
1903 Inst.addOperand(MCOperand::CreateImm(mode));
1904 } else if (imod && !M) {
1905 Inst.setOpcode(ARM::CPS2p);
1906 Inst.addOperand(MCOperand::CreateImm(imod));
1907 Inst.addOperand(MCOperand::CreateImm(iflags));
1908 if (mode) S = MCDisassembler::SoftFail;
1909 } else if (!imod && M) {
1910 Inst.setOpcode(ARM::CPS1p);
1911 Inst.addOperand(MCOperand::CreateImm(mode));
1912 if (iflags) S = MCDisassembler::SoftFail;
1914 // imod == '00' && M == '0' --> UNPREDICTABLE
1915 Inst.setOpcode(ARM::CPS1p);
1916 Inst.addOperand(MCOperand::CreateImm(mode));
1917 S = MCDisassembler::SoftFail;
1923 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1924 uint64_t Address, const void *Decoder) {
1925 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1926 unsigned M = fieldFromInstruction(Insn, 8, 1);
1927 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1928 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1930 DecodeStatus S = MCDisassembler::Success;
1932 // imod == '01' --> UNPREDICTABLE
1933 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1934 // return failure here. The '01' imod value is unprintable, so there's
1935 // nothing useful we could do even if we returned UNPREDICTABLE.
1937 if (imod == 1) return MCDisassembler::Fail;
1940 Inst.setOpcode(ARM::t2CPS3p);
1941 Inst.addOperand(MCOperand::CreateImm(imod));
1942 Inst.addOperand(MCOperand::CreateImm(iflags));
1943 Inst.addOperand(MCOperand::CreateImm(mode));
1944 } else if (imod && !M) {
1945 Inst.setOpcode(ARM::t2CPS2p);
1946 Inst.addOperand(MCOperand::CreateImm(imod));
1947 Inst.addOperand(MCOperand::CreateImm(iflags));
1948 if (mode) S = MCDisassembler::SoftFail;
1949 } else if (!imod && M) {
1950 Inst.setOpcode(ARM::t2CPS1p);
1951 Inst.addOperand(MCOperand::CreateImm(mode));
1952 if (iflags) S = MCDisassembler::SoftFail;
1954 // imod == '00' && M == '0' --> UNPREDICTABLE
1955 Inst.setOpcode(ARM::t2CPS1p);
1956 Inst.addOperand(MCOperand::CreateImm(mode));
1957 S = MCDisassembler::SoftFail;
1963 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1964 uint64_t Address, const void *Decoder) {
1965 DecodeStatus S = MCDisassembler::Success;
1967 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
1970 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
1971 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
1972 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1973 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
1975 if (Inst.getOpcode() == ARM::t2MOVTi16)
1976 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1977 return MCDisassembler::Fail;
1978 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1979 return MCDisassembler::Fail;
1981 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1982 Inst.addOperand(MCOperand::CreateImm(imm));
1987 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1988 uint64_t Address, const void *Decoder) {
1989 DecodeStatus S = MCDisassembler::Success;
1991 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1992 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1995 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
1996 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1998 if (Inst.getOpcode() == ARM::MOVTi16)
1999 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2000 return MCDisassembler::Fail;
2001 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2002 return MCDisassembler::Fail;
2004 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2005 Inst.addOperand(MCOperand::CreateImm(imm));
2007 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2008 return MCDisassembler::Fail;
2013 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2014 uint64_t Address, const void *Decoder) {
2015 DecodeStatus S = MCDisassembler::Success;
2017 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2018 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2019 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2020 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2021 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2024 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2026 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2027 return MCDisassembler::Fail;
2028 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2029 return MCDisassembler::Fail;
2030 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2031 return MCDisassembler::Fail;
2032 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2033 return MCDisassembler::Fail;
2035 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2036 return MCDisassembler::Fail;
2041 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2042 uint64_t Address, const void *Decoder) {
2043 DecodeStatus S = MCDisassembler::Success;
2045 unsigned add = fieldFromInstruction(Val, 12, 1);
2046 unsigned imm = fieldFromInstruction(Val, 0, 12);
2047 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2049 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2050 return MCDisassembler::Fail;
2052 if (!add) imm *= -1;
2053 if (imm == 0 && !add) imm = INT32_MIN;
2054 Inst.addOperand(MCOperand::CreateImm(imm));
2056 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2061 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2062 uint64_t Address, const void *Decoder) {
2063 DecodeStatus S = MCDisassembler::Success;
2065 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2066 unsigned U = fieldFromInstruction(Val, 8, 1);
2067 unsigned imm = fieldFromInstruction(Val, 0, 8);
2069 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2070 return MCDisassembler::Fail;
2073 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2075 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2080 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2081 uint64_t Address, const void *Decoder) {
2082 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2086 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2087 uint64_t Address, const void *Decoder) {
2088 DecodeStatus Status = MCDisassembler::Success;
2090 // Note the J1 and J2 values are from the encoded instruction. So here
2091 // change them to I1 and I2 values via as documented:
2092 // I1 = NOT(J1 EOR S);
2093 // I2 = NOT(J2 EOR S);
2094 // and build the imm32 with one trailing zero as documented:
2095 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2096 unsigned S = fieldFromInstruction(Insn, 26, 1);
2097 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2098 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2099 unsigned I1 = !(J1 ^ S);
2100 unsigned I2 = !(J2 ^ S);
2101 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2102 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2103 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2104 int imm32 = SignExtend32<24>(tmp << 1);
2105 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2106 true, 4, Inst, Decoder))
2107 Inst.addOperand(MCOperand::CreateImm(imm32));
2113 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2114 uint64_t Address, const void *Decoder) {
2115 DecodeStatus S = MCDisassembler::Success;
2117 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2118 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2121 Inst.setOpcode(ARM::BLXi);
2122 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2123 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2124 true, 4, Inst, Decoder))
2125 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2129 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2130 true, 4, Inst, Decoder))
2131 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2132 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2133 return MCDisassembler::Fail;
2139 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2140 uint64_t Address, const void *Decoder) {
2141 DecodeStatus S = MCDisassembler::Success;
2143 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2144 unsigned align = fieldFromInstruction(Val, 4, 2);
2146 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2147 return MCDisassembler::Fail;
2149 Inst.addOperand(MCOperand::CreateImm(0));
2151 Inst.addOperand(MCOperand::CreateImm(4 << align));
2156 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2157 uint64_t Address, const void *Decoder) {
2158 DecodeStatus S = MCDisassembler::Success;
2160 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2161 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2162 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2163 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2164 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2165 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2167 // First output register
2168 switch (Inst.getOpcode()) {
2169 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2170 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2171 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2172 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2173 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2174 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2175 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2176 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2177 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2178 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2179 return MCDisassembler::Fail;
2184 case ARM::VLD2b16wb_fixed:
2185 case ARM::VLD2b16wb_register:
2186 case ARM::VLD2b32wb_fixed:
2187 case ARM::VLD2b32wb_register:
2188 case ARM::VLD2b8wb_fixed:
2189 case ARM::VLD2b8wb_register:
2190 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2191 return MCDisassembler::Fail;
2194 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2195 return MCDisassembler::Fail;
2198 // Second output register
2199 switch (Inst.getOpcode()) {
2203 case ARM::VLD3d8_UPD:
2204 case ARM::VLD3d16_UPD:
2205 case ARM::VLD3d32_UPD:
2209 case ARM::VLD4d8_UPD:
2210 case ARM::VLD4d16_UPD:
2211 case ARM::VLD4d32_UPD:
2212 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2213 return MCDisassembler::Fail;
2218 case ARM::VLD3q8_UPD:
2219 case ARM::VLD3q16_UPD:
2220 case ARM::VLD3q32_UPD:
2224 case ARM::VLD4q8_UPD:
2225 case ARM::VLD4q16_UPD:
2226 case ARM::VLD4q32_UPD:
2227 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2228 return MCDisassembler::Fail;
2233 // Third output register
2234 switch(Inst.getOpcode()) {
2238 case ARM::VLD3d8_UPD:
2239 case ARM::VLD3d16_UPD:
2240 case ARM::VLD3d32_UPD:
2244 case ARM::VLD4d8_UPD:
2245 case ARM::VLD4d16_UPD:
2246 case ARM::VLD4d32_UPD:
2247 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2248 return MCDisassembler::Fail;
2253 case ARM::VLD3q8_UPD:
2254 case ARM::VLD3q16_UPD:
2255 case ARM::VLD3q32_UPD:
2259 case ARM::VLD4q8_UPD:
2260 case ARM::VLD4q16_UPD:
2261 case ARM::VLD4q32_UPD:
2262 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2263 return MCDisassembler::Fail;
2269 // Fourth output register
2270 switch (Inst.getOpcode()) {
2274 case ARM::VLD4d8_UPD:
2275 case ARM::VLD4d16_UPD:
2276 case ARM::VLD4d32_UPD:
2277 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2278 return MCDisassembler::Fail;
2283 case ARM::VLD4q8_UPD:
2284 case ARM::VLD4q16_UPD:
2285 case ARM::VLD4q32_UPD:
2286 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2287 return MCDisassembler::Fail;
2293 // Writeback operand
2294 switch (Inst.getOpcode()) {
2295 case ARM::VLD1d8wb_fixed:
2296 case ARM::VLD1d16wb_fixed:
2297 case ARM::VLD1d32wb_fixed:
2298 case ARM::VLD1d64wb_fixed:
2299 case ARM::VLD1d8wb_register:
2300 case ARM::VLD1d16wb_register:
2301 case ARM::VLD1d32wb_register:
2302 case ARM::VLD1d64wb_register:
2303 case ARM::VLD1q8wb_fixed:
2304 case ARM::VLD1q16wb_fixed:
2305 case ARM::VLD1q32wb_fixed:
2306 case ARM::VLD1q64wb_fixed:
2307 case ARM::VLD1q8wb_register:
2308 case ARM::VLD1q16wb_register:
2309 case ARM::VLD1q32wb_register:
2310 case ARM::VLD1q64wb_register:
2311 case ARM::VLD1d8Twb_fixed:
2312 case ARM::VLD1d8Twb_register:
2313 case ARM::VLD1d16Twb_fixed:
2314 case ARM::VLD1d16Twb_register:
2315 case ARM::VLD1d32Twb_fixed:
2316 case ARM::VLD1d32Twb_register:
2317 case ARM::VLD1d64Twb_fixed:
2318 case ARM::VLD1d64Twb_register:
2319 case ARM::VLD1d8Qwb_fixed:
2320 case ARM::VLD1d8Qwb_register:
2321 case ARM::VLD1d16Qwb_fixed:
2322 case ARM::VLD1d16Qwb_register:
2323 case ARM::VLD1d32Qwb_fixed:
2324 case ARM::VLD1d32Qwb_register:
2325 case ARM::VLD1d64Qwb_fixed:
2326 case ARM::VLD1d64Qwb_register:
2327 case ARM::VLD2d8wb_fixed:
2328 case ARM::VLD2d16wb_fixed:
2329 case ARM::VLD2d32wb_fixed:
2330 case ARM::VLD2q8wb_fixed:
2331 case ARM::VLD2q16wb_fixed:
2332 case ARM::VLD2q32wb_fixed:
2333 case ARM::VLD2d8wb_register:
2334 case ARM::VLD2d16wb_register:
2335 case ARM::VLD2d32wb_register:
2336 case ARM::VLD2q8wb_register:
2337 case ARM::VLD2q16wb_register:
2338 case ARM::VLD2q32wb_register:
2339 case ARM::VLD2b8wb_fixed:
2340 case ARM::VLD2b16wb_fixed:
2341 case ARM::VLD2b32wb_fixed:
2342 case ARM::VLD2b8wb_register:
2343 case ARM::VLD2b16wb_register:
2344 case ARM::VLD2b32wb_register:
2345 Inst.addOperand(MCOperand::CreateImm(0));
2347 case ARM::VLD3d8_UPD:
2348 case ARM::VLD3d16_UPD:
2349 case ARM::VLD3d32_UPD:
2350 case ARM::VLD3q8_UPD:
2351 case ARM::VLD3q16_UPD:
2352 case ARM::VLD3q32_UPD:
2353 case ARM::VLD4d8_UPD:
2354 case ARM::VLD4d16_UPD:
2355 case ARM::VLD4d32_UPD:
2356 case ARM::VLD4q8_UPD:
2357 case ARM::VLD4q16_UPD:
2358 case ARM::VLD4q32_UPD:
2359 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2360 return MCDisassembler::Fail;
2366 // AddrMode6 Base (register+alignment)
2367 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2368 return MCDisassembler::Fail;
2370 // AddrMode6 Offset (register)
2371 switch (Inst.getOpcode()) {
2373 // The below have been updated to have explicit am6offset split
2374 // between fixed and register offset. For those instructions not
2375 // yet updated, we need to add an additional reg0 operand for the
2378 // The fixed offset encodes as Rm == 0xd, so we check for that.
2380 Inst.addOperand(MCOperand::CreateReg(0));
2383 // Fall through to handle the register offset variant.
2384 case ARM::VLD1d8wb_fixed:
2385 case ARM::VLD1d16wb_fixed:
2386 case ARM::VLD1d32wb_fixed:
2387 case ARM::VLD1d64wb_fixed:
2388 case ARM::VLD1d8Twb_fixed:
2389 case ARM::VLD1d16Twb_fixed:
2390 case ARM::VLD1d32Twb_fixed:
2391 case ARM::VLD1d64Twb_fixed:
2392 case ARM::VLD1d8Qwb_fixed:
2393 case ARM::VLD1d16Qwb_fixed:
2394 case ARM::VLD1d32Qwb_fixed:
2395 case ARM::VLD1d64Qwb_fixed:
2396 case ARM::VLD1d8wb_register:
2397 case ARM::VLD1d16wb_register:
2398 case ARM::VLD1d32wb_register:
2399 case ARM::VLD1d64wb_register:
2400 case ARM::VLD1q8wb_fixed:
2401 case ARM::VLD1q16wb_fixed:
2402 case ARM::VLD1q32wb_fixed:
2403 case ARM::VLD1q64wb_fixed:
2404 case ARM::VLD1q8wb_register:
2405 case ARM::VLD1q16wb_register:
2406 case ARM::VLD1q32wb_register:
2407 case ARM::VLD1q64wb_register:
2408 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2409 // variant encodes Rm == 0xf. Anything else is a register offset post-
2410 // increment and we need to add the register operand to the instruction.
2411 if (Rm != 0xD && Rm != 0xF &&
2412 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2413 return MCDisassembler::Fail;
2415 case ARM::VLD2d8wb_fixed:
2416 case ARM::VLD2d16wb_fixed:
2417 case ARM::VLD2d32wb_fixed:
2418 case ARM::VLD2b8wb_fixed:
2419 case ARM::VLD2b16wb_fixed:
2420 case ARM::VLD2b32wb_fixed:
2421 case ARM::VLD2q8wb_fixed:
2422 case ARM::VLD2q16wb_fixed:
2423 case ARM::VLD2q32wb_fixed:
2430 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2431 uint64_t Address, const void *Decoder) {
2432 DecodeStatus S = MCDisassembler::Success;
2434 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2435 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2436 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2437 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2438 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2439 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2441 // Writeback Operand
2442 switch (Inst.getOpcode()) {
2443 case ARM::VST1d8wb_fixed:
2444 case ARM::VST1d16wb_fixed:
2445 case ARM::VST1d32wb_fixed:
2446 case ARM::VST1d64wb_fixed:
2447 case ARM::VST1d8wb_register:
2448 case ARM::VST1d16wb_register:
2449 case ARM::VST1d32wb_register:
2450 case ARM::VST1d64wb_register:
2451 case ARM::VST1q8wb_fixed:
2452 case ARM::VST1q16wb_fixed:
2453 case ARM::VST1q32wb_fixed:
2454 case ARM::VST1q64wb_fixed:
2455 case ARM::VST1q8wb_register:
2456 case ARM::VST1q16wb_register:
2457 case ARM::VST1q32wb_register:
2458 case ARM::VST1q64wb_register:
2459 case ARM::VST1d8Twb_fixed:
2460 case ARM::VST1d16Twb_fixed:
2461 case ARM::VST1d32Twb_fixed:
2462 case ARM::VST1d64Twb_fixed:
2463 case ARM::VST1d8Twb_register:
2464 case ARM::VST1d16Twb_register:
2465 case ARM::VST1d32Twb_register:
2466 case ARM::VST1d64Twb_register:
2467 case ARM::VST1d8Qwb_fixed:
2468 case ARM::VST1d16Qwb_fixed:
2469 case ARM::VST1d32Qwb_fixed:
2470 case ARM::VST1d64Qwb_fixed:
2471 case ARM::VST1d8Qwb_register:
2472 case ARM::VST1d16Qwb_register:
2473 case ARM::VST1d32Qwb_register:
2474 case ARM::VST1d64Qwb_register:
2475 case ARM::VST2d8wb_fixed:
2476 case ARM::VST2d16wb_fixed:
2477 case ARM::VST2d32wb_fixed:
2478 case ARM::VST2d8wb_register:
2479 case ARM::VST2d16wb_register:
2480 case ARM::VST2d32wb_register:
2481 case ARM::VST2q8wb_fixed:
2482 case ARM::VST2q16wb_fixed:
2483 case ARM::VST2q32wb_fixed:
2484 case ARM::VST2q8wb_register:
2485 case ARM::VST2q16wb_register:
2486 case ARM::VST2q32wb_register:
2487 case ARM::VST2b8wb_fixed:
2488 case ARM::VST2b16wb_fixed:
2489 case ARM::VST2b32wb_fixed:
2490 case ARM::VST2b8wb_register:
2491 case ARM::VST2b16wb_register:
2492 case ARM::VST2b32wb_register:
2494 return MCDisassembler::Fail;
2495 Inst.addOperand(MCOperand::CreateImm(0));
2497 case ARM::VST3d8_UPD:
2498 case ARM::VST3d16_UPD:
2499 case ARM::VST3d32_UPD:
2500 case ARM::VST3q8_UPD:
2501 case ARM::VST3q16_UPD:
2502 case ARM::VST3q32_UPD:
2503 case ARM::VST4d8_UPD:
2504 case ARM::VST4d16_UPD:
2505 case ARM::VST4d32_UPD:
2506 case ARM::VST4q8_UPD:
2507 case ARM::VST4q16_UPD:
2508 case ARM::VST4q32_UPD:
2509 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2510 return MCDisassembler::Fail;
2516 // AddrMode6 Base (register+alignment)
2517 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2518 return MCDisassembler::Fail;
2520 // AddrMode6 Offset (register)
2521 switch (Inst.getOpcode()) {
2524 Inst.addOperand(MCOperand::CreateReg(0));
2525 else if (Rm != 0xF) {
2526 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2527 return MCDisassembler::Fail;
2530 case ARM::VST1d8wb_fixed:
2531 case ARM::VST1d16wb_fixed:
2532 case ARM::VST1d32wb_fixed:
2533 case ARM::VST1d64wb_fixed:
2534 case ARM::VST1q8wb_fixed:
2535 case ARM::VST1q16wb_fixed:
2536 case ARM::VST1q32wb_fixed:
2537 case ARM::VST1q64wb_fixed:
2538 case ARM::VST1d8Twb_fixed:
2539 case ARM::VST1d16Twb_fixed:
2540 case ARM::VST1d32Twb_fixed:
2541 case ARM::VST1d64Twb_fixed:
2542 case ARM::VST1d8Qwb_fixed:
2543 case ARM::VST1d16Qwb_fixed:
2544 case ARM::VST1d32Qwb_fixed:
2545 case ARM::VST1d64Qwb_fixed:
2546 case ARM::VST2d8wb_fixed:
2547 case ARM::VST2d16wb_fixed:
2548 case ARM::VST2d32wb_fixed:
2549 case ARM::VST2q8wb_fixed:
2550 case ARM::VST2q16wb_fixed:
2551 case ARM::VST2q32wb_fixed:
2552 case ARM::VST2b8wb_fixed:
2553 case ARM::VST2b16wb_fixed:
2554 case ARM::VST2b32wb_fixed:
2559 // First input register
2560 switch (Inst.getOpcode()) {
2565 case ARM::VST1q16wb_fixed:
2566 case ARM::VST1q16wb_register:
2567 case ARM::VST1q32wb_fixed:
2568 case ARM::VST1q32wb_register:
2569 case ARM::VST1q64wb_fixed:
2570 case ARM::VST1q64wb_register:
2571 case ARM::VST1q8wb_fixed:
2572 case ARM::VST1q8wb_register:
2576 case ARM::VST2d16wb_fixed:
2577 case ARM::VST2d16wb_register:
2578 case ARM::VST2d32wb_fixed:
2579 case ARM::VST2d32wb_register:
2580 case ARM::VST2d8wb_fixed:
2581 case ARM::VST2d8wb_register:
2582 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2583 return MCDisassembler::Fail;
2588 case ARM::VST2b16wb_fixed:
2589 case ARM::VST2b16wb_register:
2590 case ARM::VST2b32wb_fixed:
2591 case ARM::VST2b32wb_register:
2592 case ARM::VST2b8wb_fixed:
2593 case ARM::VST2b8wb_register:
2594 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2595 return MCDisassembler::Fail;
2598 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2599 return MCDisassembler::Fail;
2602 // Second input register
2603 switch (Inst.getOpcode()) {
2607 case ARM::VST3d8_UPD:
2608 case ARM::VST3d16_UPD:
2609 case ARM::VST3d32_UPD:
2613 case ARM::VST4d8_UPD:
2614 case ARM::VST4d16_UPD:
2615 case ARM::VST4d32_UPD:
2616 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2617 return MCDisassembler::Fail;
2622 case ARM::VST3q8_UPD:
2623 case ARM::VST3q16_UPD:
2624 case ARM::VST3q32_UPD:
2628 case ARM::VST4q8_UPD:
2629 case ARM::VST4q16_UPD:
2630 case ARM::VST4q32_UPD:
2631 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2632 return MCDisassembler::Fail;
2638 // Third input register
2639 switch (Inst.getOpcode()) {
2643 case ARM::VST3d8_UPD:
2644 case ARM::VST3d16_UPD:
2645 case ARM::VST3d32_UPD:
2649 case ARM::VST4d8_UPD:
2650 case ARM::VST4d16_UPD:
2651 case ARM::VST4d32_UPD:
2652 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2653 return MCDisassembler::Fail;
2658 case ARM::VST3q8_UPD:
2659 case ARM::VST3q16_UPD:
2660 case ARM::VST3q32_UPD:
2664 case ARM::VST4q8_UPD:
2665 case ARM::VST4q16_UPD:
2666 case ARM::VST4q32_UPD:
2667 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2668 return MCDisassembler::Fail;
2674 // Fourth input register
2675 switch (Inst.getOpcode()) {
2679 case ARM::VST4d8_UPD:
2680 case ARM::VST4d16_UPD:
2681 case ARM::VST4d32_UPD:
2682 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2683 return MCDisassembler::Fail;
2688 case ARM::VST4q8_UPD:
2689 case ARM::VST4q16_UPD:
2690 case ARM::VST4q32_UPD:
2691 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2692 return MCDisassembler::Fail;
2701 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2702 uint64_t Address, const void *Decoder) {
2703 DecodeStatus S = MCDisassembler::Success;
2705 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2706 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2707 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2708 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2709 unsigned align = fieldFromInstruction(Insn, 4, 1);
2710 unsigned size = fieldFromInstruction(Insn, 6, 2);
2712 if (size == 0 && align == 1)
2713 return MCDisassembler::Fail;
2714 align *= (1 << size);
2716 switch (Inst.getOpcode()) {
2717 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2718 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2719 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2720 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2721 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2722 return MCDisassembler::Fail;
2725 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2726 return MCDisassembler::Fail;
2730 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2731 return MCDisassembler::Fail;
2734 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2735 return MCDisassembler::Fail;
2736 Inst.addOperand(MCOperand::CreateImm(align));
2738 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2739 // variant encodes Rm == 0xf. Anything else is a register offset post-
2740 // increment and we need to add the register operand to the instruction.
2741 if (Rm != 0xD && Rm != 0xF &&
2742 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2743 return MCDisassembler::Fail;
2748 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2749 uint64_t Address, const void *Decoder) {
2750 DecodeStatus S = MCDisassembler::Success;
2752 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2753 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2754 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2755 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2756 unsigned align = fieldFromInstruction(Insn, 4, 1);
2757 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2760 switch (Inst.getOpcode()) {
2761 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2762 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2763 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2764 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2765 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2766 return MCDisassembler::Fail;
2768 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2769 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2770 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2771 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2772 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2773 return MCDisassembler::Fail;
2776 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2777 return MCDisassembler::Fail;
2782 Inst.addOperand(MCOperand::CreateImm(0));
2784 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2785 return MCDisassembler::Fail;
2786 Inst.addOperand(MCOperand::CreateImm(align));
2788 if (Rm != 0xD && Rm != 0xF) {
2789 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2790 return MCDisassembler::Fail;
2796 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2797 uint64_t Address, const void *Decoder) {
2798 DecodeStatus S = MCDisassembler::Success;
2800 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2801 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2802 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2803 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2804 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2806 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2807 return MCDisassembler::Fail;
2808 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2809 return MCDisassembler::Fail;
2810 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2811 return MCDisassembler::Fail;
2813 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2814 return MCDisassembler::Fail;
2817 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2818 return MCDisassembler::Fail;
2819 Inst.addOperand(MCOperand::CreateImm(0));
2822 Inst.addOperand(MCOperand::CreateReg(0));
2823 else if (Rm != 0xF) {
2824 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2825 return MCDisassembler::Fail;
2831 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2832 uint64_t Address, const void *Decoder) {
2833 DecodeStatus S = MCDisassembler::Success;
2835 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2836 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2837 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2838 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2839 unsigned size = fieldFromInstruction(Insn, 6, 2);
2840 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2841 unsigned align = fieldFromInstruction(Insn, 4, 1);
2845 return MCDisassembler::Fail;
2858 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2859 return MCDisassembler::Fail;
2860 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2861 return MCDisassembler::Fail;
2862 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2863 return MCDisassembler::Fail;
2864 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2865 return MCDisassembler::Fail;
2867 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2868 return MCDisassembler::Fail;
2871 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2872 return MCDisassembler::Fail;
2873 Inst.addOperand(MCOperand::CreateImm(align));
2876 Inst.addOperand(MCOperand::CreateReg(0));
2877 else if (Rm != 0xF) {
2878 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2879 return MCDisassembler::Fail;
2886 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2887 uint64_t Address, const void *Decoder) {
2888 DecodeStatus S = MCDisassembler::Success;
2890 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2891 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2892 unsigned imm = fieldFromInstruction(Insn, 0, 4);
2893 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2894 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2895 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2896 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2897 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2900 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2901 return MCDisassembler::Fail;
2903 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2904 return MCDisassembler::Fail;
2907 Inst.addOperand(MCOperand::CreateImm(imm));
2909 switch (Inst.getOpcode()) {
2910 case ARM::VORRiv4i16:
2911 case ARM::VORRiv2i32:
2912 case ARM::VBICiv4i16:
2913 case ARM::VBICiv2i32:
2914 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2915 return MCDisassembler::Fail;
2917 case ARM::VORRiv8i16:
2918 case ARM::VORRiv4i32:
2919 case ARM::VBICiv8i16:
2920 case ARM::VBICiv4i32:
2921 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2922 return MCDisassembler::Fail;
2931 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2932 uint64_t Address, const void *Decoder) {
2933 DecodeStatus S = MCDisassembler::Success;
2935 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2936 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2937 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2938 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2939 unsigned size = fieldFromInstruction(Insn, 18, 2);
2941 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2942 return MCDisassembler::Fail;
2943 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2944 return MCDisassembler::Fail;
2945 Inst.addOperand(MCOperand::CreateImm(8 << size));
2950 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2951 uint64_t Address, const void *Decoder) {
2952 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2953 return MCDisassembler::Success;
2956 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2957 uint64_t Address, const void *Decoder) {
2958 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2959 return MCDisassembler::Success;
2962 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2963 uint64_t Address, const void *Decoder) {
2964 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2965 return MCDisassembler::Success;
2968 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2969 uint64_t Address, const void *Decoder) {
2970 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2971 return MCDisassembler::Success;
2974 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2975 uint64_t Address, const void *Decoder) {
2976 DecodeStatus S = MCDisassembler::Success;
2978 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2979 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2980 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2981 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
2982 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2983 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2984 unsigned op = fieldFromInstruction(Insn, 6, 1);
2986 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2987 return MCDisassembler::Fail;
2989 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2990 return MCDisassembler::Fail; // Writeback
2993 switch (Inst.getOpcode()) {
2996 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
2997 return MCDisassembler::Fail;
3000 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3001 return MCDisassembler::Fail;
3004 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3005 return MCDisassembler::Fail;
3010 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3011 uint64_t Address, const void *Decoder) {
3012 DecodeStatus S = MCDisassembler::Success;
3014 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3015 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3017 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3018 return MCDisassembler::Fail;
3020 switch(Inst.getOpcode()) {
3022 return MCDisassembler::Fail;
3024 break; // tADR does not explicitly represent the PC as an operand.
3026 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3030 Inst.addOperand(MCOperand::CreateImm(imm));
3034 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3035 uint64_t Address, const void *Decoder) {
3036 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3037 true, 2, Inst, Decoder))
3038 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3039 return MCDisassembler::Success;
3042 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3043 uint64_t Address, const void *Decoder) {
3044 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3045 true, 4, Inst, Decoder))
3046 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3047 return MCDisassembler::Success;
3050 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3051 uint64_t Address, const void *Decoder) {
3052 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3053 true, 2, Inst, Decoder))
3054 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3055 return MCDisassembler::Success;
3058 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3059 uint64_t Address, const void *Decoder) {
3060 DecodeStatus S = MCDisassembler::Success;
3062 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3063 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3065 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3066 return MCDisassembler::Fail;
3067 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3068 return MCDisassembler::Fail;
3073 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3074 uint64_t Address, const void *Decoder) {
3075 DecodeStatus S = MCDisassembler::Success;
3077 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3078 unsigned imm = fieldFromInstruction(Val, 3, 5);
3080 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3081 return MCDisassembler::Fail;
3082 Inst.addOperand(MCOperand::CreateImm(imm));
3087 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3088 uint64_t Address, const void *Decoder) {
3089 unsigned imm = Val << 2;
3091 Inst.addOperand(MCOperand::CreateImm(imm));
3092 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3094 return MCDisassembler::Success;
3097 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3098 uint64_t Address, const void *Decoder) {
3099 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3100 Inst.addOperand(MCOperand::CreateImm(Val));
3102 return MCDisassembler::Success;
3105 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3106 uint64_t Address, const void *Decoder) {
3107 DecodeStatus S = MCDisassembler::Success;
3109 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3110 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3111 unsigned imm = fieldFromInstruction(Val, 0, 2);
3113 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3114 return MCDisassembler::Fail;
3115 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3116 return MCDisassembler::Fail;
3117 Inst.addOperand(MCOperand::CreateImm(imm));
3122 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3123 uint64_t Address, const void *Decoder) {
3124 DecodeStatus S = MCDisassembler::Success;
3126 switch (Inst.getOpcode()) {
3132 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3133 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3134 return MCDisassembler::Fail;
3138 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3140 switch (Inst.getOpcode()) {
3142 Inst.setOpcode(ARM::t2LDRBpci);
3145 Inst.setOpcode(ARM::t2LDRHpci);
3148 Inst.setOpcode(ARM::t2LDRSHpci);
3151 Inst.setOpcode(ARM::t2LDRSBpci);
3154 Inst.setOpcode(ARM::t2PLDi12);
3155 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3158 return MCDisassembler::Fail;
3161 int imm = fieldFromInstruction(Insn, 0, 12);
3162 if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
3163 Inst.addOperand(MCOperand::CreateImm(imm));
3168 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3169 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3170 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3171 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3172 return MCDisassembler::Fail;
3177 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3178 uint64_t Address, const void *Decoder) {
3180 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3182 int imm = Val & 0xFF;
3184 if (!(Val & 0x100)) imm *= -1;
3185 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3188 return MCDisassembler::Success;
3191 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3192 uint64_t Address, const void *Decoder) {
3193 DecodeStatus S = MCDisassembler::Success;
3195 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3196 unsigned imm = fieldFromInstruction(Val, 0, 9);
3198 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3199 return MCDisassembler::Fail;
3200 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3201 return MCDisassembler::Fail;
3206 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3207 uint64_t Address, const void *Decoder) {
3208 DecodeStatus S = MCDisassembler::Success;
3210 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3211 unsigned imm = fieldFromInstruction(Val, 0, 8);
3213 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3214 return MCDisassembler::Fail;
3216 Inst.addOperand(MCOperand::CreateImm(imm));
3221 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3222 uint64_t Address, const void *Decoder) {
3223 int imm = Val & 0xFF;
3226 else if (!(Val & 0x100))
3228 Inst.addOperand(MCOperand::CreateImm(imm));
3230 return MCDisassembler::Success;
3234 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3235 uint64_t Address, const void *Decoder) {
3236 DecodeStatus S = MCDisassembler::Success;
3238 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3239 unsigned imm = fieldFromInstruction(Val, 0, 9);
3241 // Some instructions always use an additive offset.
3242 switch (Inst.getOpcode()) {
3257 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3258 return MCDisassembler::Fail;
3259 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3260 return MCDisassembler::Fail;
3265 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3266 uint64_t Address, const void *Decoder) {
3267 DecodeStatus S = MCDisassembler::Success;
3269 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3270 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3271 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3272 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3274 unsigned load = fieldFromInstruction(Insn, 20, 1);
3277 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3278 return MCDisassembler::Fail;
3281 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3282 return MCDisassembler::Fail;
3285 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3286 return MCDisassembler::Fail;
3289 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3290 return MCDisassembler::Fail;
3295 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3296 uint64_t Address, const void *Decoder) {
3297 DecodeStatus S = MCDisassembler::Success;
3299 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3300 unsigned imm = fieldFromInstruction(Val, 0, 12);
3302 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3303 return MCDisassembler::Fail;
3304 Inst.addOperand(MCOperand::CreateImm(imm));
3310 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3311 uint64_t Address, const void *Decoder) {
3312 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3314 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3315 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3316 Inst.addOperand(MCOperand::CreateImm(imm));
3318 return MCDisassembler::Success;
3321 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3322 uint64_t Address, const void *Decoder) {
3323 DecodeStatus S = MCDisassembler::Success;
3325 if (Inst.getOpcode() == ARM::tADDrSP) {
3326 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3327 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3329 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3330 return MCDisassembler::Fail;
3331 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3332 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3333 return MCDisassembler::Fail;
3334 } else if (Inst.getOpcode() == ARM::tADDspr) {
3335 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3337 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3338 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3339 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3340 return MCDisassembler::Fail;
3346 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3347 uint64_t Address, const void *Decoder) {
3348 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3349 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3351 Inst.addOperand(MCOperand::CreateImm(imod));
3352 Inst.addOperand(MCOperand::CreateImm(flags));
3354 return MCDisassembler::Success;
3357 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3358 uint64_t Address, const void *Decoder) {
3359 DecodeStatus S = MCDisassembler::Success;
3360 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3361 unsigned add = fieldFromInstruction(Insn, 4, 1);
3363 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3364 return MCDisassembler::Fail;
3365 Inst.addOperand(MCOperand::CreateImm(add));
3370 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3371 uint64_t Address, const void *Decoder) {
3372 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3373 // Note only one trailing zero not two. Also the J1 and J2 values are from
3374 // the encoded instruction. So here change to I1 and I2 values via:
3375 // I1 = NOT(J1 EOR S);
3376 // I2 = NOT(J2 EOR S);
3377 // and build the imm32 with two trailing zeros as documented:
3378 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3379 unsigned S = (Val >> 23) & 1;
3380 unsigned J1 = (Val >> 22) & 1;
3381 unsigned J2 = (Val >> 21) & 1;
3382 unsigned I1 = !(J1 ^ S);
3383 unsigned I2 = !(J2 ^ S);
3384 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3385 int imm32 = SignExtend32<25>(tmp << 1);
3387 if (!tryAddingSymbolicOperand(Address,
3388 (Address & ~2u) + imm32 + 4,
3389 true, 4, Inst, Decoder))
3390 Inst.addOperand(MCOperand::CreateImm(imm32));
3391 return MCDisassembler::Success;
3394 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3395 uint64_t Address, const void *Decoder) {
3396 if (Val == 0xA || Val == 0xB)
3397 return MCDisassembler::Fail;
3399 Inst.addOperand(MCOperand::CreateImm(Val));
3400 return MCDisassembler::Success;
3404 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3405 uint64_t Address, const void *Decoder) {
3406 DecodeStatus S = MCDisassembler::Success;
3408 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3409 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3411 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3412 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3413 return MCDisassembler::Fail;
3414 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3415 return MCDisassembler::Fail;
3420 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3421 uint64_t Address, const void *Decoder) {
3422 DecodeStatus S = MCDisassembler::Success;
3424 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3425 if (pred == 0xE || pred == 0xF) {
3426 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3429 return MCDisassembler::Fail;
3431 Inst.setOpcode(ARM::t2DSB);
3434 Inst.setOpcode(ARM::t2DMB);
3437 Inst.setOpcode(ARM::t2ISB);
3441 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3442 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3445 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3446 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3447 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3448 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3449 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3451 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3452 return MCDisassembler::Fail;
3453 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3454 return MCDisassembler::Fail;
3459 // Decode a shifted immediate operand. These basically consist
3460 // of an 8-bit value, and a 4-bit directive that specifies either
3461 // a splat operation or a rotation.
3462 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3463 uint64_t Address, const void *Decoder) {
3464 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3466 unsigned byte = fieldFromInstruction(Val, 8, 2);
3467 unsigned imm = fieldFromInstruction(Val, 0, 8);
3470 Inst.addOperand(MCOperand::CreateImm(imm));
3473 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3476 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3479 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3484 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3485 unsigned rot = fieldFromInstruction(Val, 7, 5);
3486 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3487 Inst.addOperand(MCOperand::CreateImm(imm));
3490 return MCDisassembler::Success;
3494 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3495 uint64_t Address, const void *Decoder){
3496 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3497 true, 2, Inst, Decoder))
3498 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3499 return MCDisassembler::Success;
3502 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3503 uint64_t Address, const void *Decoder){
3504 // Val is passed in as S:J1:J2:imm10:imm11
3505 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3506 // the encoded instruction. So here change to I1 and I2 values via:
3507 // I1 = NOT(J1 EOR S);
3508 // I2 = NOT(J2 EOR S);
3509 // and build the imm32 with one trailing zero as documented:
3510 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3511 unsigned S = (Val >> 23) & 1;
3512 unsigned J1 = (Val >> 22) & 1;
3513 unsigned J2 = (Val >> 21) & 1;
3514 unsigned I1 = !(J1 ^ S);
3515 unsigned I2 = !(J2 ^ S);
3516 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3517 int imm32 = SignExtend32<25>(tmp << 1);
3519 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3520 true, 4, Inst, Decoder))
3521 Inst.addOperand(MCOperand::CreateImm(imm32));
3522 return MCDisassembler::Success;
3525 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3526 uint64_t Address, const void *Decoder) {
3528 return MCDisassembler::Fail;
3530 Inst.addOperand(MCOperand::CreateImm(Val));
3531 return MCDisassembler::Success;
3534 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3535 uint64_t Address, const void *Decoder) {
3536 if (!Val) return MCDisassembler::Fail;
3537 Inst.addOperand(MCOperand::CreateImm(Val));
3538 return MCDisassembler::Success;
3541 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3542 uint64_t Address, const void *Decoder) {
3543 DecodeStatus S = MCDisassembler::Success;
3545 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3546 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3547 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3549 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3551 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3552 return MCDisassembler::Fail;
3553 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3554 return MCDisassembler::Fail;
3555 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3556 return MCDisassembler::Fail;
3557 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3558 return MCDisassembler::Fail;
3564 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3565 uint64_t Address, const void *Decoder){
3566 DecodeStatus S = MCDisassembler::Success;
3568 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3569 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3570 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3571 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3573 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3574 return MCDisassembler::Fail;
3576 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3577 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3579 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3580 return MCDisassembler::Fail;
3581 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3582 return MCDisassembler::Fail;
3583 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3584 return MCDisassembler::Fail;
3585 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3586 return MCDisassembler::Fail;
3591 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3592 uint64_t Address, const void *Decoder) {
3593 DecodeStatus S = MCDisassembler::Success;
3595 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3596 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3597 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3598 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3599 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3600 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3602 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3604 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3605 return MCDisassembler::Fail;
3606 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3607 return MCDisassembler::Fail;
3608 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3609 return MCDisassembler::Fail;
3610 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3611 return MCDisassembler::Fail;
3616 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3617 uint64_t Address, const void *Decoder) {
3618 DecodeStatus S = MCDisassembler::Success;
3620 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3621 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3622 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3623 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3624 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3625 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3626 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3628 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3629 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3631 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3632 return MCDisassembler::Fail;
3633 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3634 return MCDisassembler::Fail;
3635 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3636 return MCDisassembler::Fail;
3637 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3638 return MCDisassembler::Fail;
3644 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3645 uint64_t Address, const void *Decoder) {
3646 DecodeStatus S = MCDisassembler::Success;
3648 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3649 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3650 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3651 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3652 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3653 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3655 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3657 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3658 return MCDisassembler::Fail;
3659 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3660 return MCDisassembler::Fail;
3661 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3662 return MCDisassembler::Fail;
3663 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3664 return MCDisassembler::Fail;
3669 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3670 uint64_t Address, const void *Decoder) {
3671 DecodeStatus S = MCDisassembler::Success;
3673 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3674 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3675 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3676 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3677 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3678 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3680 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3682 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3683 return MCDisassembler::Fail;
3684 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3685 return MCDisassembler::Fail;
3686 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3687 return MCDisassembler::Fail;
3688 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3689 return MCDisassembler::Fail;
3694 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3695 uint64_t Address, const void *Decoder) {
3696 DecodeStatus S = MCDisassembler::Success;
3698 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3699 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3700 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3701 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3702 unsigned size = fieldFromInstruction(Insn, 10, 2);
3708 return MCDisassembler::Fail;
3710 if (fieldFromInstruction(Insn, 4, 1))
3711 return MCDisassembler::Fail; // UNDEFINED
3712 index = fieldFromInstruction(Insn, 5, 3);
3715 if (fieldFromInstruction(Insn, 5, 1))
3716 return MCDisassembler::Fail; // UNDEFINED
3717 index = fieldFromInstruction(Insn, 6, 2);
3718 if (fieldFromInstruction(Insn, 4, 1))
3722 if (fieldFromInstruction(Insn, 6, 1))
3723 return MCDisassembler::Fail; // UNDEFINED
3724 index = fieldFromInstruction(Insn, 7, 1);
3726 switch (fieldFromInstruction(Insn, 4, 2)) {
3732 return MCDisassembler::Fail;
3737 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3738 return MCDisassembler::Fail;
3739 if (Rm != 0xF) { // Writeback
3740 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3741 return MCDisassembler::Fail;
3743 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3744 return MCDisassembler::Fail;
3745 Inst.addOperand(MCOperand::CreateImm(align));
3748 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3749 return MCDisassembler::Fail;
3751 Inst.addOperand(MCOperand::CreateReg(0));
3754 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3755 return MCDisassembler::Fail;
3756 Inst.addOperand(MCOperand::CreateImm(index));
3761 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3762 uint64_t Address, const void *Decoder) {
3763 DecodeStatus S = MCDisassembler::Success;
3765 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3766 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3767 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3768 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3769 unsigned size = fieldFromInstruction(Insn, 10, 2);
3775 return MCDisassembler::Fail;
3777 if (fieldFromInstruction(Insn, 4, 1))
3778 return MCDisassembler::Fail; // UNDEFINED
3779 index = fieldFromInstruction(Insn, 5, 3);
3782 if (fieldFromInstruction(Insn, 5, 1))
3783 return MCDisassembler::Fail; // UNDEFINED
3784 index = fieldFromInstruction(Insn, 6, 2);
3785 if (fieldFromInstruction(Insn, 4, 1))
3789 if (fieldFromInstruction(Insn, 6, 1))
3790 return MCDisassembler::Fail; // UNDEFINED
3791 index = fieldFromInstruction(Insn, 7, 1);
3793 switch (fieldFromInstruction(Insn, 4, 2)) {
3799 return MCDisassembler::Fail;
3804 if (Rm != 0xF) { // Writeback
3805 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3806 return MCDisassembler::Fail;
3808 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3809 return MCDisassembler::Fail;
3810 Inst.addOperand(MCOperand::CreateImm(align));
3813 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3814 return MCDisassembler::Fail;
3816 Inst.addOperand(MCOperand::CreateReg(0));
3819 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3820 return MCDisassembler::Fail;
3821 Inst.addOperand(MCOperand::CreateImm(index));
3827 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3828 uint64_t Address, const void *Decoder) {
3829 DecodeStatus S = MCDisassembler::Success;
3831 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3832 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3833 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3834 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3835 unsigned size = fieldFromInstruction(Insn, 10, 2);
3842 return MCDisassembler::Fail;
3844 index = fieldFromInstruction(Insn, 5, 3);
3845 if (fieldFromInstruction(Insn, 4, 1))
3849 index = fieldFromInstruction(Insn, 6, 2);
3850 if (fieldFromInstruction(Insn, 4, 1))
3852 if (fieldFromInstruction(Insn, 5, 1))
3856 if (fieldFromInstruction(Insn, 5, 1))
3857 return MCDisassembler::Fail; // UNDEFINED
3858 index = fieldFromInstruction(Insn, 7, 1);
3859 if (fieldFromInstruction(Insn, 4, 1) != 0)
3861 if (fieldFromInstruction(Insn, 6, 1))
3866 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3867 return MCDisassembler::Fail;
3868 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3869 return MCDisassembler::Fail;
3870 if (Rm != 0xF) { // Writeback
3871 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3872 return MCDisassembler::Fail;
3874 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3875 return MCDisassembler::Fail;
3876 Inst.addOperand(MCOperand::CreateImm(align));
3879 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3880 return MCDisassembler::Fail;
3882 Inst.addOperand(MCOperand::CreateReg(0));
3885 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3886 return MCDisassembler::Fail;
3887 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3888 return MCDisassembler::Fail;
3889 Inst.addOperand(MCOperand::CreateImm(index));
3894 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3895 uint64_t Address, const void *Decoder) {
3896 DecodeStatus S = MCDisassembler::Success;
3898 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3899 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3900 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3901 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3902 unsigned size = fieldFromInstruction(Insn, 10, 2);
3909 return MCDisassembler::Fail;
3911 index = fieldFromInstruction(Insn, 5, 3);
3912 if (fieldFromInstruction(Insn, 4, 1))
3916 index = fieldFromInstruction(Insn, 6, 2);
3917 if (fieldFromInstruction(Insn, 4, 1))
3919 if (fieldFromInstruction(Insn, 5, 1))
3923 if (fieldFromInstruction(Insn, 5, 1))
3924 return MCDisassembler::Fail; // UNDEFINED
3925 index = fieldFromInstruction(Insn, 7, 1);
3926 if (fieldFromInstruction(Insn, 4, 1) != 0)
3928 if (fieldFromInstruction(Insn, 6, 1))
3933 if (Rm != 0xF) { // Writeback
3934 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3935 return MCDisassembler::Fail;
3937 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3938 return MCDisassembler::Fail;
3939 Inst.addOperand(MCOperand::CreateImm(align));
3942 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3943 return MCDisassembler::Fail;
3945 Inst.addOperand(MCOperand::CreateReg(0));
3948 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3949 return MCDisassembler::Fail;
3950 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3951 return MCDisassembler::Fail;
3952 Inst.addOperand(MCOperand::CreateImm(index));
3958 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3959 uint64_t Address, const void *Decoder) {
3960 DecodeStatus S = MCDisassembler::Success;
3962 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3963 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3964 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3965 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3966 unsigned size = fieldFromInstruction(Insn, 10, 2);
3973 return MCDisassembler::Fail;
3975 if (fieldFromInstruction(Insn, 4, 1))
3976 return MCDisassembler::Fail; // UNDEFINED
3977 index = fieldFromInstruction(Insn, 5, 3);
3980 if (fieldFromInstruction(Insn, 4, 1))
3981 return MCDisassembler::Fail; // UNDEFINED
3982 index = fieldFromInstruction(Insn, 6, 2);
3983 if (fieldFromInstruction(Insn, 5, 1))
3987 if (fieldFromInstruction(Insn, 4, 2))
3988 return MCDisassembler::Fail; // UNDEFINED
3989 index = fieldFromInstruction(Insn, 7, 1);
3990 if (fieldFromInstruction(Insn, 6, 1))
3995 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3996 return MCDisassembler::Fail;
3997 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3998 return MCDisassembler::Fail;
3999 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4000 return MCDisassembler::Fail;
4002 if (Rm != 0xF) { // Writeback
4003 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4004 return MCDisassembler::Fail;
4006 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4007 return MCDisassembler::Fail;
4008 Inst.addOperand(MCOperand::CreateImm(align));
4011 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4012 return MCDisassembler::Fail;
4014 Inst.addOperand(MCOperand::CreateReg(0));
4017 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4018 return MCDisassembler::Fail;
4019 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4020 return MCDisassembler::Fail;
4021 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4022 return MCDisassembler::Fail;
4023 Inst.addOperand(MCOperand::CreateImm(index));
4028 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4029 uint64_t Address, const void *Decoder) {
4030 DecodeStatus S = MCDisassembler::Success;
4032 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4033 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4034 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4035 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4036 unsigned size = fieldFromInstruction(Insn, 10, 2);
4043 return MCDisassembler::Fail;
4045 if (fieldFromInstruction(Insn, 4, 1))
4046 return MCDisassembler::Fail; // UNDEFINED
4047 index = fieldFromInstruction(Insn, 5, 3);
4050 if (fieldFromInstruction(Insn, 4, 1))
4051 return MCDisassembler::Fail; // UNDEFINED
4052 index = fieldFromInstruction(Insn, 6, 2);
4053 if (fieldFromInstruction(Insn, 5, 1))
4057 if (fieldFromInstruction(Insn, 4, 2))
4058 return MCDisassembler::Fail; // UNDEFINED
4059 index = fieldFromInstruction(Insn, 7, 1);
4060 if (fieldFromInstruction(Insn, 6, 1))
4065 if (Rm != 0xF) { // Writeback
4066 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4067 return MCDisassembler::Fail;
4069 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4070 return MCDisassembler::Fail;
4071 Inst.addOperand(MCOperand::CreateImm(align));
4074 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4075 return MCDisassembler::Fail;
4077 Inst.addOperand(MCOperand::CreateReg(0));
4080 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4081 return MCDisassembler::Fail;
4082 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4083 return MCDisassembler::Fail;
4084 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4085 return MCDisassembler::Fail;
4086 Inst.addOperand(MCOperand::CreateImm(index));
4092 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4093 uint64_t Address, const void *Decoder) {
4094 DecodeStatus S = MCDisassembler::Success;
4096 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4097 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4098 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4099 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4100 unsigned size = fieldFromInstruction(Insn, 10, 2);
4107 return MCDisassembler::Fail;
4109 if (fieldFromInstruction(Insn, 4, 1))
4111 index = fieldFromInstruction(Insn, 5, 3);
4114 if (fieldFromInstruction(Insn, 4, 1))
4116 index = fieldFromInstruction(Insn, 6, 2);
4117 if (fieldFromInstruction(Insn, 5, 1))
4121 switch (fieldFromInstruction(Insn, 4, 2)) {
4125 return MCDisassembler::Fail;
4127 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4130 index = fieldFromInstruction(Insn, 7, 1);
4131 if (fieldFromInstruction(Insn, 6, 1))
4136 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4137 return MCDisassembler::Fail;
4138 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4139 return MCDisassembler::Fail;
4140 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4141 return MCDisassembler::Fail;
4142 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4143 return MCDisassembler::Fail;
4145 if (Rm != 0xF) { // Writeback
4146 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4147 return MCDisassembler::Fail;
4149 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4150 return MCDisassembler::Fail;
4151 Inst.addOperand(MCOperand::CreateImm(align));
4154 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4155 return MCDisassembler::Fail;
4157 Inst.addOperand(MCOperand::CreateReg(0));
4160 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4161 return MCDisassembler::Fail;
4162 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4163 return MCDisassembler::Fail;
4164 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4165 return MCDisassembler::Fail;
4166 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4167 return MCDisassembler::Fail;
4168 Inst.addOperand(MCOperand::CreateImm(index));
4173 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4174 uint64_t Address, const void *Decoder) {
4175 DecodeStatus S = MCDisassembler::Success;
4177 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4178 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4179 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4180 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4181 unsigned size = fieldFromInstruction(Insn, 10, 2);
4188 return MCDisassembler::Fail;
4190 if (fieldFromInstruction(Insn, 4, 1))
4192 index = fieldFromInstruction(Insn, 5, 3);
4195 if (fieldFromInstruction(Insn, 4, 1))
4197 index = fieldFromInstruction(Insn, 6, 2);
4198 if (fieldFromInstruction(Insn, 5, 1))
4202 switch (fieldFromInstruction(Insn, 4, 2)) {
4206 return MCDisassembler::Fail;
4208 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4211 index = fieldFromInstruction(Insn, 7, 1);
4212 if (fieldFromInstruction(Insn, 6, 1))
4217 if (Rm != 0xF) { // Writeback
4218 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4219 return MCDisassembler::Fail;
4221 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4222 return MCDisassembler::Fail;
4223 Inst.addOperand(MCOperand::CreateImm(align));
4226 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4227 return MCDisassembler::Fail;
4229 Inst.addOperand(MCOperand::CreateReg(0));
4232 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4233 return MCDisassembler::Fail;
4234 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4235 return MCDisassembler::Fail;
4236 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4237 return MCDisassembler::Fail;
4238 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4239 return MCDisassembler::Fail;
4240 Inst.addOperand(MCOperand::CreateImm(index));
4245 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4246 uint64_t Address, const void *Decoder) {
4247 DecodeStatus S = MCDisassembler::Success;
4248 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4249 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4250 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4251 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4252 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4254 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4255 S = MCDisassembler::SoftFail;
4257 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4258 return MCDisassembler::Fail;
4259 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4260 return MCDisassembler::Fail;
4261 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4262 return MCDisassembler::Fail;
4263 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4264 return MCDisassembler::Fail;
4265 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4266 return MCDisassembler::Fail;
4271 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4272 uint64_t Address, const void *Decoder) {
4273 DecodeStatus S = MCDisassembler::Success;
4274 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4275 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4276 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4277 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4278 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4280 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4281 S = MCDisassembler::SoftFail;
4283 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4284 return MCDisassembler::Fail;
4285 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4286 return MCDisassembler::Fail;
4287 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4288 return MCDisassembler::Fail;
4289 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4290 return MCDisassembler::Fail;
4291 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4292 return MCDisassembler::Fail;
4297 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4298 uint64_t Address, const void *Decoder) {
4299 DecodeStatus S = MCDisassembler::Success;
4300 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4301 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4305 S = MCDisassembler::SoftFail;
4310 S = MCDisassembler::SoftFail;
4313 Inst.addOperand(MCOperand::CreateImm(pred));
4314 Inst.addOperand(MCOperand::CreateImm(mask));
4319 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4320 uint64_t Address, const void *Decoder) {
4321 DecodeStatus S = MCDisassembler::Success;
4323 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4324 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4325 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4326 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4327 unsigned W = fieldFromInstruction(Insn, 21, 1);
4328 unsigned U = fieldFromInstruction(Insn, 23, 1);
4329 unsigned P = fieldFromInstruction(Insn, 24, 1);
4330 bool writeback = (W == 1) | (P == 0);
4332 addr |= (U << 8) | (Rn << 9);
4334 if (writeback && (Rn == Rt || Rn == Rt2))
4335 Check(S, MCDisassembler::SoftFail);
4337 Check(S, MCDisassembler::SoftFail);
4340 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4341 return MCDisassembler::Fail;
4343 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4344 return MCDisassembler::Fail;
4345 // Writeback operand
4346 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4347 return MCDisassembler::Fail;
4349 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4350 return MCDisassembler::Fail;
4356 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4357 uint64_t Address, const void *Decoder) {
4358 DecodeStatus S = MCDisassembler::Success;
4360 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4361 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4362 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4363 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4364 unsigned W = fieldFromInstruction(Insn, 21, 1);
4365 unsigned U = fieldFromInstruction(Insn, 23, 1);
4366 unsigned P = fieldFromInstruction(Insn, 24, 1);
4367 bool writeback = (W == 1) | (P == 0);
4369 addr |= (U << 8) | (Rn << 9);
4371 if (writeback && (Rn == Rt || Rn == Rt2))
4372 Check(S, MCDisassembler::SoftFail);
4374 // Writeback operand
4375 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4376 return MCDisassembler::Fail;
4378 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4379 return MCDisassembler::Fail;
4381 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4382 return MCDisassembler::Fail;
4384 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4385 return MCDisassembler::Fail;
4390 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4391 uint64_t Address, const void *Decoder) {
4392 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4393 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4394 if (sign1 != sign2) return MCDisassembler::Fail;
4396 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4397 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4398 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4400 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4402 return MCDisassembler::Success;
4405 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4407 const void *Decoder) {
4408 DecodeStatus S = MCDisassembler::Success;
4410 // Shift of "asr #32" is not allowed in Thumb2 mode.
4411 if (Val == 0x20) S = MCDisassembler::SoftFail;
4412 Inst.addOperand(MCOperand::CreateImm(Val));
4416 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4417 uint64_t Address, const void *Decoder) {
4418 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4419 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4420 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4421 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4424 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4426 DecodeStatus S = MCDisassembler::Success;
4428 if (Rt == Rn || Rn == Rt2)
4429 S = MCDisassembler::SoftFail;
4431 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4432 return MCDisassembler::Fail;
4433 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4434 return MCDisassembler::Fail;
4435 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4436 return MCDisassembler::Fail;
4437 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4438 return MCDisassembler::Fail;
4443 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4444 uint64_t Address, const void *Decoder) {
4445 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4446 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4447 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4448 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4449 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4450 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4452 DecodeStatus S = MCDisassembler::Success;
4454 // VMOVv2f32 is ambiguous with these decodings.
4455 if (!(imm & 0x38) && cmode == 0xF) {
4456 Inst.setOpcode(ARM::VMOVv2f32);
4457 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4460 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4462 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4463 return MCDisassembler::Fail;
4464 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4465 return MCDisassembler::Fail;
4466 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4471 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4472 uint64_t Address, const void *Decoder) {
4473 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4474 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4475 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4476 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4477 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4478 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4480 DecodeStatus S = MCDisassembler::Success;
4482 // VMOVv4f32 is ambiguous with these decodings.
4483 if (!(imm & 0x38) && cmode == 0xF) {
4484 Inst.setOpcode(ARM::VMOVv4f32);
4485 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4488 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4490 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4491 return MCDisassembler::Fail;
4492 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4493 return MCDisassembler::Fail;
4494 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4499 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4500 uint64_t Address, const void *Decoder) {
4501 DecodeStatus S = MCDisassembler::Success;
4503 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4504 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4505 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4506 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4507 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4509 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4510 S = MCDisassembler::SoftFail;
4512 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4513 return MCDisassembler::Fail;
4514 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4515 return MCDisassembler::Fail;
4516 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4517 return MCDisassembler::Fail;
4518 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4519 return MCDisassembler::Fail;
4520 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4521 return MCDisassembler::Fail;
4526 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4527 uint64_t Address, const void *Decoder) {
4529 DecodeStatus S = MCDisassembler::Success;
4531 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4532 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4533 unsigned cop = fieldFromInstruction(Val, 8, 4);
4534 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4535 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4537 if ((cop & ~0x1) == 0xa)
4538 return MCDisassembler::Fail;
4541 S = MCDisassembler::SoftFail;
4543 Inst.addOperand(MCOperand::CreateImm(cop));
4544 Inst.addOperand(MCOperand::CreateImm(opc1));
4545 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4546 return MCDisassembler::Fail;
4547 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4548 return MCDisassembler::Fail;
4549 Inst.addOperand(MCOperand::CreateImm(CRm));