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 DecodeGPRwithAPSRRegisterClass(MCInst &Inst,
160 unsigned RegNo, uint64_t Address,
161 const void *Decoder);
162 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
163 uint64_t Address, const void *Decoder);
164 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
165 uint64_t Address, const void *Decoder);
166 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
167 uint64_t Address, const void *Decoder);
168 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
169 uint64_t Address, const void *Decoder);
170 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
171 uint64_t Address, const void *Decoder);
172 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
173 uint64_t Address, const void *Decoder);
174 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
177 const void *Decoder);
178 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
179 uint64_t Address, const void *Decoder);
180 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
181 uint64_t Address, const void *Decoder);
182 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
183 unsigned RegNo, uint64_t Address,
184 const void *Decoder);
186 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
188 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
197 uint64_t Address, const void *Decoder);
199 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
200 uint64_t Address, const void *Decoder);
201 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
202 uint64_t Address, const void *Decoder);
203 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
206 const void *Decoder);
207 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
208 uint64_t Address, const void *Decoder);
209 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
210 uint64_t Address, const void *Decoder);
211 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
212 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
214 uint64_t Address, const void *Decoder);
216 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
219 const void *Decoder);
220 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
221 uint64_t Address, const void *Decoder);
222 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
223 uint64_t Address, const void *Decoder);
224 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
225 uint64_t Address, const void *Decoder);
226 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
227 uint64_t Address, const void *Decoder);
228 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
229 uint64_t Address, const void *Decoder);
230 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
231 uint64_t Address, const void *Decoder);
232 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
233 uint64_t Address, const void *Decoder);
234 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
235 uint64_t Address, const void *Decoder);
236 static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
237 uint64_t Address, const void *Decoder);
238 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
239 uint64_t Address, const void *Decoder);
240 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
241 uint64_t Address, const void *Decoder);
242 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
243 uint64_t Address, const void *Decoder);
244 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
245 uint64_t Address, const void *Decoder);
246 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
247 uint64_t Address, const void *Decoder);
248 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
249 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
251 uint64_t Address, const void *Decoder);
252 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
253 uint64_t Address, const void *Decoder);
254 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
255 uint64_t Address, const void *Decoder);
256 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
257 uint64_t Address, const void *Decoder);
258 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
259 uint64_t Address, const void *Decoder);
260 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
261 uint64_t Address, const void *Decoder);
262 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
263 uint64_t Address, const void *Decoder);
264 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
265 uint64_t Address, const void *Decoder);
266 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
267 uint64_t Address, const void *Decoder);
268 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
269 uint64_t Address, const void *Decoder);
270 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
271 uint64_t Address, const void *Decoder);
272 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
307 uint64_t Address, const void *Decoder);
308 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
309 uint64_t Address, const void *Decoder);
310 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
311 uint64_t Address, const void *Decoder);
312 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
313 uint64_t Address, const void *Decoder);
314 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
315 const void *Decoder);
318 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
319 uint64_t Address, const void *Decoder);
320 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
321 uint64_t Address, const void *Decoder);
322 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
323 uint64_t Address, const void *Decoder);
324 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
325 uint64_t Address, const void *Decoder);
326 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
327 uint64_t Address, const void *Decoder);
328 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
329 uint64_t Address, const void *Decoder);
330 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
331 uint64_t Address, const void *Decoder);
332 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
333 uint64_t Address, const void *Decoder);
334 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
335 uint64_t Address, const void *Decoder);
336 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
337 uint64_t Address, const void *Decoder);
338 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
339 uint64_t Address, const void *Decoder);
340 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
341 uint64_t Address, const void *Decoder);
342 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
343 uint64_t Address, const void *Decoder);
344 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
345 uint64_t Address, const void *Decoder);
346 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
347 uint64_t Address, const void *Decoder);
348 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
349 uint64_t Address, const void *Decoder);
350 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
351 uint64_t Address, const void *Decoder);
352 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
353 uint64_t Address, const void *Decoder);
354 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
355 uint64_t Address, const void *Decoder);
356 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
357 uint64_t Address, const void *Decoder);
358 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
359 uint64_t Address, const void *Decoder);
360 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
361 uint64_t Address, const void *Decoder);
362 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
363 uint64_t Address, const void *Decoder);
364 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
365 uint64_t Address, const void *Decoder);
366 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
367 uint64_t Address, const void *Decoder);
368 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
369 uint64_t Address, const void *Decoder);
370 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
371 uint64_t Address, const void *Decoder);
372 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
373 uint64_t Address, const void *Decoder);
374 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
375 uint64_t Address, const void *Decoder);
376 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
377 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
379 uint64_t Address, const void *Decoder);
381 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
382 uint64_t Address, const void *Decoder);
383 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
384 uint64_t Address, const void *Decoder);
385 #include "ARMGenDisassemblerTables.inc"
387 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
388 return new ARMDisassembler(STI);
391 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
392 return new ThumbDisassembler(STI);
395 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
396 const MemoryObject &Region,
399 raw_ostream &cs) const {
404 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
405 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
407 // We want to read exactly 4 bytes of data.
408 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
410 return MCDisassembler::Fail;
413 // Encoded as a small-endian 32-bit word in the stream.
414 uint32_t insn = (bytes[3] << 24) |
419 // Calling the auto-generated decoder function.
420 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
422 if (result != MCDisassembler::Fail) {
427 // VFP and NEON instructions, similarly, are shared between ARM
430 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
431 if (result != MCDisassembler::Fail) {
437 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
439 if (result != MCDisassembler::Fail) {
441 // Add a fake predicate operand, because we share these instruction
442 // definitions with Thumb2 where these instructions are predicable.
443 if (!DecodePredicateOperand(MI, 0xE, Address, this))
444 return MCDisassembler::Fail;
449 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
451 if (result != MCDisassembler::Fail) {
453 // Add a fake predicate operand, because we share these instruction
454 // definitions with Thumb2 where these instructions are predicable.
455 if (!DecodePredicateOperand(MI, 0xE, Address, this))
456 return MCDisassembler::Fail;
461 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
463 if (result != MCDisassembler::Fail) {
465 // Add a fake predicate operand, because we share these instruction
466 // definitions with Thumb2 where these instructions are predicable.
467 if (!DecodePredicateOperand(MI, 0xE, Address, this))
468 return MCDisassembler::Fail;
475 return MCDisassembler::Fail;
479 extern const MCInstrDesc ARMInsts[];
482 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
483 /// immediate Value in the MCInst. The immediate Value has had any PC
484 /// adjustment made by the caller. If the instruction is a branch instruction
485 /// then isBranch is true, else false. If the getOpInfo() function was set as
486 /// part of the setupForSymbolicDisassembly() call then that function is called
487 /// to get any symbolic information at the Address for this instruction. If
488 /// that returns non-zero then the symbolic information it returns is used to
489 /// create an MCExpr and that is added as an operand to the MCInst. If
490 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
491 /// Value is done and if a symbol is found an MCExpr is created with that, else
492 /// an MCExpr with Value is created. This function returns true if it adds an
493 /// operand to the MCInst and false otherwise.
494 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
495 bool isBranch, uint64_t InstSize,
496 MCInst &MI, const void *Decoder) {
497 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
498 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
499 struct LLVMOpInfo1 SymbolicOp;
500 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
501 SymbolicOp.Value = Value;
502 void *DisInfo = Dis->getDisInfoBlock();
505 !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
506 // Clear SymbolicOp.Value from above and also all other fields.
507 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
508 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
511 uint64_t ReferenceType;
513 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
515 ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
516 const char *ReferenceName;
517 uint64_t SymbolValue = 0x00000000ffffffffULL & Value;
518 const char *Name = SymbolLookUp(DisInfo, SymbolValue, &ReferenceType,
519 Address, &ReferenceName);
521 SymbolicOp.AddSymbol.Name = Name;
522 SymbolicOp.AddSymbol.Present = true;
524 // For branches always create an MCExpr so it gets printed as hex address.
526 SymbolicOp.Value = Value;
528 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
529 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
530 if (!Name && !isBranch)
534 MCContext *Ctx = Dis->getMCContext();
535 const MCExpr *Add = NULL;
536 if (SymbolicOp.AddSymbol.Present) {
537 if (SymbolicOp.AddSymbol.Name) {
538 StringRef Name(SymbolicOp.AddSymbol.Name);
539 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
540 Add = MCSymbolRefExpr::Create(Sym, *Ctx);
542 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
546 const MCExpr *Sub = NULL;
547 if (SymbolicOp.SubtractSymbol.Present) {
548 if (SymbolicOp.SubtractSymbol.Name) {
549 StringRef Name(SymbolicOp.SubtractSymbol.Name);
550 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
551 Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
553 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
557 const MCExpr *Off = NULL;
558 if (SymbolicOp.Value != 0)
559 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
565 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
567 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
569 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
574 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
581 Expr = MCConstantExpr::Create(0, *Ctx);
584 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
585 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
586 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
587 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
588 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
589 MI.addOperand(MCOperand::CreateExpr(Expr));
591 llvm_unreachable("bad SymbolicOp.VariantKind");
596 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
597 /// referenced by a load instruction with the base register that is the Pc.
598 /// These can often be values in a literal pool near the Address of the
599 /// instruction. The Address of the instruction and its immediate Value are
600 /// used as a possible literal pool entry. The SymbolLookUp call back will
601 /// return the name of a symbol referenced by the literal pool's entry if
602 /// the referenced address is that of a symbol. Or it will return a pointer to
603 /// a literal 'C' string if the referenced address of the literal pool's entry
604 /// is an address into a section with 'C' string literals.
605 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
606 const void *Decoder) {
607 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
608 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
610 void *DisInfo = Dis->getDisInfoBlock();
611 uint64_t ReferenceType;
612 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
613 const char *ReferenceName;
614 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
615 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
616 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
617 (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
621 // Thumb1 instructions don't have explicit S bits. Rather, they
622 // implicitly set CPSR. Since it's not represented in the encoding, the
623 // auto-generated decoder won't inject the CPSR operand. We need to fix
624 // that as a post-pass.
625 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
626 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
627 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
628 MCInst::iterator I = MI.begin();
629 for (unsigned i = 0; i < NumOps; ++i, ++I) {
630 if (I == MI.end()) break;
631 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
632 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
633 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
638 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
641 // Most Thumb instructions don't have explicit predicates in the
642 // encoding, but rather get their predicates from IT context. We need
643 // to fix up the predicate operands using this context information as a
645 MCDisassembler::DecodeStatus
646 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
647 MCDisassembler::DecodeStatus S = Success;
649 // A few instructions actually have predicates encoded in them. Don't
650 // try to overwrite it if we're seeing one of those.
651 switch (MI.getOpcode()) {
662 // Some instructions (mostly conditional branches) are not
663 // allowed in IT blocks.
664 if (ITBlock.instrInITBlock())
673 // Some instructions (mostly unconditional branches) can
674 // only appears at the end of, or outside of, an IT.
675 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
682 // If we're in an IT block, base the predicate on that. Otherwise,
683 // assume a predicate of AL.
685 CC = ITBlock.getITCC();
688 if (ITBlock.instrInITBlock())
689 ITBlock.advanceITState();
691 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
692 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
693 MCInst::iterator I = MI.begin();
694 for (unsigned i = 0; i < NumOps; ++i, ++I) {
695 if (I == MI.end()) break;
696 if (OpInfo[i].isPredicate()) {
697 I = MI.insert(I, MCOperand::CreateImm(CC));
700 MI.insert(I, MCOperand::CreateReg(0));
702 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
707 I = MI.insert(I, MCOperand::CreateImm(CC));
710 MI.insert(I, MCOperand::CreateReg(0));
712 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
717 // Thumb VFP instructions are a special case. Because we share their
718 // encodings between ARM and Thumb modes, and they are predicable in ARM
719 // mode, the auto-generated decoder will give them an (incorrect)
720 // predicate operand. We need to rewrite these operands based on the IT
721 // context as a post-pass.
722 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
724 CC = ITBlock.getITCC();
725 if (ITBlock.instrInITBlock())
726 ITBlock.advanceITState();
728 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
729 MCInst::iterator I = MI.begin();
730 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
731 for (unsigned i = 0; i < NumOps; ++i, ++I) {
732 if (OpInfo[i].isPredicate() ) {
738 I->setReg(ARM::CPSR);
744 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
745 const MemoryObject &Region,
748 raw_ostream &cs) const {
753 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
754 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
756 // We want to read exactly 2 bytes of data.
757 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
759 return MCDisassembler::Fail;
762 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
763 DecodeStatus result = decodeInstruction(DecoderTableThumb16, MI, insn16,
765 if (result != MCDisassembler::Fail) {
767 Check(result, AddThumbPredicate(MI));
772 result = decodeInstruction(DecoderTableThumbSBit16, MI, insn16,
776 bool InITBlock = ITBlock.instrInITBlock();
777 Check(result, AddThumbPredicate(MI));
778 AddThumb1SBit(MI, InITBlock);
783 result = decodeInstruction(DecoderTableThumb216, MI, insn16,
785 if (result != MCDisassembler::Fail) {
788 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
789 // the Thumb predicate.
790 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
791 result = MCDisassembler::SoftFail;
793 Check(result, AddThumbPredicate(MI));
795 // If we find an IT instruction, we need to parse its condition
796 // code and mask operands so that we can apply them correctly
797 // to the subsequent instructions.
798 if (MI.getOpcode() == ARM::t2IT) {
800 unsigned Firstcond = MI.getOperand(0).getImm();
801 unsigned Mask = MI.getOperand(1).getImm();
802 ITBlock.setITState(Firstcond, Mask);
808 // We want to read exactly 4 bytes of data.
809 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
811 return MCDisassembler::Fail;
814 uint32_t insn32 = (bytes[3] << 8) |
819 result = decodeInstruction(DecoderTableThumb32, MI, insn32, Address,
821 if (result != MCDisassembler::Fail) {
823 bool InITBlock = ITBlock.instrInITBlock();
824 Check(result, AddThumbPredicate(MI));
825 AddThumb1SBit(MI, InITBlock);
830 result = decodeInstruction(DecoderTableThumb232, MI, insn32, Address,
832 if (result != MCDisassembler::Fail) {
834 Check(result, AddThumbPredicate(MI));
839 result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
840 if (result != MCDisassembler::Fail) {
842 UpdateThumbVFPPredicate(MI);
847 result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
849 if (result != MCDisassembler::Fail) {
851 Check(result, AddThumbPredicate(MI));
855 if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
857 uint32_t NEONLdStInsn = insn32;
858 NEONLdStInsn &= 0xF0FFFFFF;
859 NEONLdStInsn |= 0x04000000;
860 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
862 if (result != MCDisassembler::Fail) {
864 Check(result, AddThumbPredicate(MI));
869 if (fieldFromInstruction(insn32, 24, 4) == 0xF) {
871 uint32_t NEONDataInsn = insn32;
872 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
873 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
874 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
875 result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
877 if (result != MCDisassembler::Fail) {
879 Check(result, AddThumbPredicate(MI));
885 return MCDisassembler::Fail;
889 extern "C" void LLVMInitializeARMDisassembler() {
890 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
891 createARMDisassembler);
892 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
893 createThumbDisassembler);
896 static const uint16_t GPRDecoderTable[] = {
897 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
898 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
899 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
900 ARM::R12, ARM::SP, ARM::LR, ARM::PC
903 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
904 uint64_t Address, const void *Decoder) {
906 return MCDisassembler::Fail;
908 unsigned Register = GPRDecoderTable[RegNo];
909 Inst.addOperand(MCOperand::CreateReg(Register));
910 return MCDisassembler::Success;
914 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
915 uint64_t Address, const void *Decoder) {
916 DecodeStatus S = MCDisassembler::Success;
919 S = MCDisassembler::SoftFail;
921 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
927 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
928 uint64_t Address, const void *Decoder) {
929 DecodeStatus S = MCDisassembler::Success;
933 Inst.addOperand(MCOperand::CreateReg(ARM::APSR_NZCV));
934 return MCDisassembler::Success;
937 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
941 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
942 uint64_t Address, const void *Decoder) {
944 return MCDisassembler::Fail;
945 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
948 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
949 uint64_t Address, const void *Decoder) {
950 unsigned Register = 0;
971 return MCDisassembler::Fail;
974 Inst.addOperand(MCOperand::CreateReg(Register));
975 return MCDisassembler::Success;
978 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
979 uint64_t Address, const void *Decoder) {
980 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
981 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
984 static const uint16_t SPRDecoderTable[] = {
985 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
986 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
987 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
988 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
989 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
990 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
991 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
992 ARM::S28, ARM::S29, ARM::S30, ARM::S31
995 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
996 uint64_t Address, const void *Decoder) {
998 return MCDisassembler::Fail;
1000 unsigned Register = SPRDecoderTable[RegNo];
1001 Inst.addOperand(MCOperand::CreateReg(Register));
1002 return MCDisassembler::Success;
1005 static const uint16_t DPRDecoderTable[] = {
1006 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
1007 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
1008 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
1009 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
1010 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
1011 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
1012 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
1013 ARM::D28, ARM::D29, ARM::D30, ARM::D31
1016 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
1017 uint64_t Address, const void *Decoder) {
1019 return MCDisassembler::Fail;
1021 unsigned Register = DPRDecoderTable[RegNo];
1022 Inst.addOperand(MCOperand::CreateReg(Register));
1023 return MCDisassembler::Success;
1026 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1027 uint64_t Address, const void *Decoder) {
1029 return MCDisassembler::Fail;
1030 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1034 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
1035 uint64_t Address, const void *Decoder) {
1037 return MCDisassembler::Fail;
1038 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1041 static const uint16_t QPRDecoderTable[] = {
1042 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1043 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1044 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1045 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1049 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1050 uint64_t Address, const void *Decoder) {
1052 return MCDisassembler::Fail;
1055 unsigned Register = QPRDecoderTable[RegNo];
1056 Inst.addOperand(MCOperand::CreateReg(Register));
1057 return MCDisassembler::Success;
1060 static const uint16_t DPairDecoderTable[] = {
1061 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1062 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1063 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1064 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1065 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1069 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1070 uint64_t Address, const void *Decoder) {
1072 return MCDisassembler::Fail;
1074 unsigned Register = DPairDecoderTable[RegNo];
1075 Inst.addOperand(MCOperand::CreateReg(Register));
1076 return MCDisassembler::Success;
1079 static const uint16_t DPairSpacedDecoderTable[] = {
1080 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1081 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1082 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1083 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1084 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1085 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1086 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1087 ARM::D28_D30, ARM::D29_D31
1090 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1093 const void *Decoder) {
1095 return MCDisassembler::Fail;
1097 unsigned Register = DPairSpacedDecoderTable[RegNo];
1098 Inst.addOperand(MCOperand::CreateReg(Register));
1099 return MCDisassembler::Success;
1102 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1103 uint64_t Address, const void *Decoder) {
1104 if (Val == 0xF) return MCDisassembler::Fail;
1105 // AL predicate is not allowed on Thumb1 branches.
1106 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1107 return MCDisassembler::Fail;
1108 Inst.addOperand(MCOperand::CreateImm(Val));
1109 if (Val == ARMCC::AL) {
1110 Inst.addOperand(MCOperand::CreateReg(0));
1112 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1113 return MCDisassembler::Success;
1116 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1117 uint64_t Address, const void *Decoder) {
1119 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1121 Inst.addOperand(MCOperand::CreateReg(0));
1122 return MCDisassembler::Success;
1125 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1126 uint64_t Address, const void *Decoder) {
1127 uint32_t imm = Val & 0xFF;
1128 uint32_t rot = (Val & 0xF00) >> 7;
1129 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1130 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1131 return MCDisassembler::Success;
1134 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1135 uint64_t Address, const void *Decoder) {
1136 DecodeStatus S = MCDisassembler::Success;
1138 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1139 unsigned type = fieldFromInstruction(Val, 5, 2);
1140 unsigned imm = fieldFromInstruction(Val, 7, 5);
1142 // Register-immediate
1143 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1144 return MCDisassembler::Fail;
1146 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1149 Shift = ARM_AM::lsl;
1152 Shift = ARM_AM::lsr;
1155 Shift = ARM_AM::asr;
1158 Shift = ARM_AM::ror;
1162 if (Shift == ARM_AM::ror && imm == 0)
1163 Shift = ARM_AM::rrx;
1165 unsigned Op = Shift | (imm << 3);
1166 Inst.addOperand(MCOperand::CreateImm(Op));
1171 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1172 uint64_t Address, const void *Decoder) {
1173 DecodeStatus S = MCDisassembler::Success;
1175 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1176 unsigned type = fieldFromInstruction(Val, 5, 2);
1177 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1179 // Register-register
1180 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1181 return MCDisassembler::Fail;
1182 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1183 return MCDisassembler::Fail;
1185 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1188 Shift = ARM_AM::lsl;
1191 Shift = ARM_AM::lsr;
1194 Shift = ARM_AM::asr;
1197 Shift = ARM_AM::ror;
1201 Inst.addOperand(MCOperand::CreateImm(Shift));
1206 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1207 uint64_t Address, const void *Decoder) {
1208 DecodeStatus S = MCDisassembler::Success;
1210 bool writebackLoad = false;
1211 unsigned writebackReg = 0;
1212 switch (Inst.getOpcode()) {
1215 case ARM::LDMIA_UPD:
1216 case ARM::LDMDB_UPD:
1217 case ARM::LDMIB_UPD:
1218 case ARM::LDMDA_UPD:
1219 case ARM::t2LDMIA_UPD:
1220 case ARM::t2LDMDB_UPD:
1221 writebackLoad = true;
1222 writebackReg = Inst.getOperand(0).getReg();
1226 // Empty register lists are not allowed.
1227 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1228 for (unsigned i = 0; i < 16; ++i) {
1229 if (Val & (1 << i)) {
1230 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1231 return MCDisassembler::Fail;
1232 // Writeback not allowed if Rn is in the target list.
1233 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1234 Check(S, MCDisassembler::SoftFail);
1241 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1242 uint64_t Address, const void *Decoder) {
1243 DecodeStatus S = MCDisassembler::Success;
1245 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1246 unsigned regs = fieldFromInstruction(Val, 0, 8);
1248 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1249 return MCDisassembler::Fail;
1250 for (unsigned i = 0; i < (regs - 1); ++i) {
1251 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1252 return MCDisassembler::Fail;
1258 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1259 uint64_t Address, const void *Decoder) {
1260 DecodeStatus S = MCDisassembler::Success;
1262 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1263 unsigned regs = fieldFromInstruction(Val, 0, 8);
1267 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1268 return MCDisassembler::Fail;
1269 for (unsigned i = 0; i < (regs - 1); ++i) {
1270 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1271 return MCDisassembler::Fail;
1277 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1278 uint64_t Address, const void *Decoder) {
1279 // This operand encodes a mask of contiguous zeros between a specified MSB
1280 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1281 // the mask of all bits LSB-and-lower, and then xor them to create
1282 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1283 // create the final mask.
1284 unsigned msb = fieldFromInstruction(Val, 5, 5);
1285 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1287 DecodeStatus S = MCDisassembler::Success;
1289 Check(S, MCDisassembler::SoftFail);
1290 // The check above will cause the warning for the "potentially undefined
1291 // instruction encoding" but we can't build a bad MCOperand value here
1292 // with a lsb > msb or else printing the MCInst will cause a crash.
1296 uint32_t msb_mask = 0xFFFFFFFF;
1297 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1298 uint32_t lsb_mask = (1U << lsb) - 1;
1300 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1304 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1305 uint64_t Address, const void *Decoder) {
1306 DecodeStatus S = MCDisassembler::Success;
1308 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1309 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1310 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1311 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1312 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1313 unsigned U = fieldFromInstruction(Insn, 23, 1);
1315 switch (Inst.getOpcode()) {
1316 case ARM::LDC_OFFSET:
1319 case ARM::LDC_OPTION:
1320 case ARM::LDCL_OFFSET:
1322 case ARM::LDCL_POST:
1323 case ARM::LDCL_OPTION:
1324 case ARM::STC_OFFSET:
1327 case ARM::STC_OPTION:
1328 case ARM::STCL_OFFSET:
1330 case ARM::STCL_POST:
1331 case ARM::STCL_OPTION:
1332 case ARM::t2LDC_OFFSET:
1333 case ARM::t2LDC_PRE:
1334 case ARM::t2LDC_POST:
1335 case ARM::t2LDC_OPTION:
1336 case ARM::t2LDCL_OFFSET:
1337 case ARM::t2LDCL_PRE:
1338 case ARM::t2LDCL_POST:
1339 case ARM::t2LDCL_OPTION:
1340 case ARM::t2STC_OFFSET:
1341 case ARM::t2STC_PRE:
1342 case ARM::t2STC_POST:
1343 case ARM::t2STC_OPTION:
1344 case ARM::t2STCL_OFFSET:
1345 case ARM::t2STCL_PRE:
1346 case ARM::t2STCL_POST:
1347 case ARM::t2STCL_OPTION:
1348 if (coproc == 0xA || coproc == 0xB)
1349 return MCDisassembler::Fail;
1355 Inst.addOperand(MCOperand::CreateImm(coproc));
1356 Inst.addOperand(MCOperand::CreateImm(CRd));
1357 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1358 return MCDisassembler::Fail;
1360 switch (Inst.getOpcode()) {
1361 case ARM::t2LDC2_OFFSET:
1362 case ARM::t2LDC2L_OFFSET:
1363 case ARM::t2LDC2_PRE:
1364 case ARM::t2LDC2L_PRE:
1365 case ARM::t2STC2_OFFSET:
1366 case ARM::t2STC2L_OFFSET:
1367 case ARM::t2STC2_PRE:
1368 case ARM::t2STC2L_PRE:
1369 case ARM::LDC2_OFFSET:
1370 case ARM::LDC2L_OFFSET:
1372 case ARM::LDC2L_PRE:
1373 case ARM::STC2_OFFSET:
1374 case ARM::STC2L_OFFSET:
1376 case ARM::STC2L_PRE:
1377 case ARM::t2LDC_OFFSET:
1378 case ARM::t2LDCL_OFFSET:
1379 case ARM::t2LDC_PRE:
1380 case ARM::t2LDCL_PRE:
1381 case ARM::t2STC_OFFSET:
1382 case ARM::t2STCL_OFFSET:
1383 case ARM::t2STC_PRE:
1384 case ARM::t2STCL_PRE:
1385 case ARM::LDC_OFFSET:
1386 case ARM::LDCL_OFFSET:
1389 case ARM::STC_OFFSET:
1390 case ARM::STCL_OFFSET:
1393 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1394 Inst.addOperand(MCOperand::CreateImm(imm));
1396 case ARM::t2LDC2_POST:
1397 case ARM::t2LDC2L_POST:
1398 case ARM::t2STC2_POST:
1399 case ARM::t2STC2L_POST:
1400 case ARM::LDC2_POST:
1401 case ARM::LDC2L_POST:
1402 case ARM::STC2_POST:
1403 case ARM::STC2L_POST:
1404 case ARM::t2LDC_POST:
1405 case ARM::t2LDCL_POST:
1406 case ARM::t2STC_POST:
1407 case ARM::t2STCL_POST:
1409 case ARM::LDCL_POST:
1411 case ARM::STCL_POST:
1415 // The 'option' variant doesn't encode 'U' in the immediate since
1416 // the immediate is unsigned [0,255].
1417 Inst.addOperand(MCOperand::CreateImm(imm));
1421 switch (Inst.getOpcode()) {
1422 case ARM::LDC_OFFSET:
1425 case ARM::LDC_OPTION:
1426 case ARM::LDCL_OFFSET:
1428 case ARM::LDCL_POST:
1429 case ARM::LDCL_OPTION:
1430 case ARM::STC_OFFSET:
1433 case ARM::STC_OPTION:
1434 case ARM::STCL_OFFSET:
1436 case ARM::STCL_POST:
1437 case ARM::STCL_OPTION:
1438 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1439 return MCDisassembler::Fail;
1449 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1450 uint64_t Address, const void *Decoder) {
1451 DecodeStatus S = MCDisassembler::Success;
1453 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1454 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1455 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1456 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1457 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1458 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1459 unsigned P = fieldFromInstruction(Insn, 24, 1);
1460 unsigned W = fieldFromInstruction(Insn, 21, 1);
1462 // On stores, the writeback operand precedes Rt.
1463 switch (Inst.getOpcode()) {
1464 case ARM::STR_POST_IMM:
1465 case ARM::STR_POST_REG:
1466 case ARM::STRB_POST_IMM:
1467 case ARM::STRB_POST_REG:
1468 case ARM::STRT_POST_REG:
1469 case ARM::STRT_POST_IMM:
1470 case ARM::STRBT_POST_REG:
1471 case ARM::STRBT_POST_IMM:
1472 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1473 return MCDisassembler::Fail;
1479 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1480 return MCDisassembler::Fail;
1482 // On loads, the writeback operand comes after Rt.
1483 switch (Inst.getOpcode()) {
1484 case ARM::LDR_POST_IMM:
1485 case ARM::LDR_POST_REG:
1486 case ARM::LDRB_POST_IMM:
1487 case ARM::LDRB_POST_REG:
1488 case ARM::LDRBT_POST_REG:
1489 case ARM::LDRBT_POST_IMM:
1490 case ARM::LDRT_POST_REG:
1491 case ARM::LDRT_POST_IMM:
1492 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1493 return MCDisassembler::Fail;
1499 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1500 return MCDisassembler::Fail;
1502 ARM_AM::AddrOpc Op = ARM_AM::add;
1503 if (!fieldFromInstruction(Insn, 23, 1))
1506 bool writeback = (P == 0) || (W == 1);
1507 unsigned idx_mode = 0;
1509 idx_mode = ARMII::IndexModePre;
1510 else if (!P && writeback)
1511 idx_mode = ARMII::IndexModePost;
1513 if (writeback && (Rn == 15 || Rn == Rt))
1514 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1517 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1518 return MCDisassembler::Fail;
1519 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1520 switch( fieldFromInstruction(Insn, 5, 2)) {
1534 return MCDisassembler::Fail;
1536 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1537 if (Opc == ARM_AM::ror && amt == 0)
1539 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1541 Inst.addOperand(MCOperand::CreateImm(imm));
1543 Inst.addOperand(MCOperand::CreateReg(0));
1544 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1545 Inst.addOperand(MCOperand::CreateImm(tmp));
1548 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1549 return MCDisassembler::Fail;
1554 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1555 uint64_t Address, const void *Decoder) {
1556 DecodeStatus S = MCDisassembler::Success;
1558 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1559 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1560 unsigned type = fieldFromInstruction(Val, 5, 2);
1561 unsigned imm = fieldFromInstruction(Val, 7, 5);
1562 unsigned U = fieldFromInstruction(Val, 12, 1);
1564 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1580 if (ShOp == ARM_AM::ror && imm == 0)
1583 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1584 return MCDisassembler::Fail;
1585 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1586 return MCDisassembler::Fail;
1589 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1591 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1592 Inst.addOperand(MCOperand::CreateImm(shift));
1598 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1599 uint64_t Address, const void *Decoder) {
1600 DecodeStatus S = MCDisassembler::Success;
1602 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1603 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1604 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1605 unsigned type = fieldFromInstruction(Insn, 22, 1);
1606 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1607 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1608 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1609 unsigned W = fieldFromInstruction(Insn, 21, 1);
1610 unsigned P = fieldFromInstruction(Insn, 24, 1);
1611 unsigned Rt2 = Rt + 1;
1613 bool writeback = (W == 1) | (P == 0);
1615 // For {LD,ST}RD, Rt must be even, else undefined.
1616 switch (Inst.getOpcode()) {
1619 case ARM::STRD_POST:
1622 case ARM::LDRD_POST:
1623 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1628 switch (Inst.getOpcode()) {
1631 case ARM::STRD_POST:
1632 if (P == 0 && W == 1)
1633 S = MCDisassembler::SoftFail;
1635 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1636 S = MCDisassembler::SoftFail;
1637 if (type && Rm == 15)
1638 S = MCDisassembler::SoftFail;
1640 S = MCDisassembler::SoftFail;
1641 if (!type && fieldFromInstruction(Insn, 8, 4))
1642 S = MCDisassembler::SoftFail;
1646 case ARM::STRH_POST:
1648 S = MCDisassembler::SoftFail;
1649 if (writeback && (Rn == 15 || Rn == Rt))
1650 S = MCDisassembler::SoftFail;
1651 if (!type && Rm == 15)
1652 S = MCDisassembler::SoftFail;
1656 case ARM::LDRD_POST:
1657 if (type && Rn == 15){
1659 S = MCDisassembler::SoftFail;
1662 if (P == 0 && W == 1)
1663 S = MCDisassembler::SoftFail;
1664 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1665 S = MCDisassembler::SoftFail;
1666 if (!type && writeback && Rn == 15)
1667 S = MCDisassembler::SoftFail;
1668 if (writeback && (Rn == Rt || Rn == Rt2))
1669 S = MCDisassembler::SoftFail;
1673 case ARM::LDRH_POST:
1674 if (type && Rn == 15){
1676 S = MCDisassembler::SoftFail;
1680 S = MCDisassembler::SoftFail;
1681 if (!type && Rm == 15)
1682 S = MCDisassembler::SoftFail;
1683 if (!type && writeback && (Rn == 15 || Rn == Rt))
1684 S = MCDisassembler::SoftFail;
1687 case ARM::LDRSH_PRE:
1688 case ARM::LDRSH_POST:
1690 case ARM::LDRSB_PRE:
1691 case ARM::LDRSB_POST:
1692 if (type && Rn == 15){
1694 S = MCDisassembler::SoftFail;
1697 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1698 S = MCDisassembler::SoftFail;
1699 if (!type && (Rt == 15 || Rm == 15))
1700 S = MCDisassembler::SoftFail;
1701 if (!type && writeback && (Rn == 15 || Rn == Rt))
1702 S = MCDisassembler::SoftFail;
1708 if (writeback) { // Writeback
1710 U |= ARMII::IndexModePre << 9;
1712 U |= ARMII::IndexModePost << 9;
1714 // On stores, the writeback operand precedes Rt.
1715 switch (Inst.getOpcode()) {
1718 case ARM::STRD_POST:
1721 case ARM::STRH_POST:
1722 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1723 return MCDisassembler::Fail;
1730 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1731 return MCDisassembler::Fail;
1732 switch (Inst.getOpcode()) {
1735 case ARM::STRD_POST:
1738 case ARM::LDRD_POST:
1739 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1740 return MCDisassembler::Fail;
1747 // On loads, the writeback operand comes after Rt.
1748 switch (Inst.getOpcode()) {
1751 case ARM::LDRD_POST:
1754 case ARM::LDRH_POST:
1756 case ARM::LDRSH_PRE:
1757 case ARM::LDRSH_POST:
1759 case ARM::LDRSB_PRE:
1760 case ARM::LDRSB_POST:
1763 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1764 return MCDisassembler::Fail;
1771 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1772 return MCDisassembler::Fail;
1775 Inst.addOperand(MCOperand::CreateReg(0));
1776 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1778 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1779 return MCDisassembler::Fail;
1780 Inst.addOperand(MCOperand::CreateImm(U));
1783 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1784 return MCDisassembler::Fail;
1789 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1790 uint64_t Address, const void *Decoder) {
1791 DecodeStatus S = MCDisassembler::Success;
1793 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1794 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1811 Inst.addOperand(MCOperand::CreateImm(mode));
1812 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1813 return MCDisassembler::Fail;
1818 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1820 uint64_t Address, const void *Decoder) {
1821 DecodeStatus S = MCDisassembler::Success;
1823 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1824 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1825 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1828 switch (Inst.getOpcode()) {
1830 Inst.setOpcode(ARM::RFEDA);
1832 case ARM::LDMDA_UPD:
1833 Inst.setOpcode(ARM::RFEDA_UPD);
1836 Inst.setOpcode(ARM::RFEDB);
1838 case ARM::LDMDB_UPD:
1839 Inst.setOpcode(ARM::RFEDB_UPD);
1842 Inst.setOpcode(ARM::RFEIA);
1844 case ARM::LDMIA_UPD:
1845 Inst.setOpcode(ARM::RFEIA_UPD);
1848 Inst.setOpcode(ARM::RFEIB);
1850 case ARM::LDMIB_UPD:
1851 Inst.setOpcode(ARM::RFEIB_UPD);
1854 Inst.setOpcode(ARM::SRSDA);
1856 case ARM::STMDA_UPD:
1857 Inst.setOpcode(ARM::SRSDA_UPD);
1860 Inst.setOpcode(ARM::SRSDB);
1862 case ARM::STMDB_UPD:
1863 Inst.setOpcode(ARM::SRSDB_UPD);
1866 Inst.setOpcode(ARM::SRSIA);
1868 case ARM::STMIA_UPD:
1869 Inst.setOpcode(ARM::SRSIA_UPD);
1872 Inst.setOpcode(ARM::SRSIB);
1874 case ARM::STMIB_UPD:
1875 Inst.setOpcode(ARM::SRSIB_UPD);
1878 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1881 // For stores (which become SRS's, the only operand is the mode.
1882 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1884 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1888 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1891 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1892 return MCDisassembler::Fail;
1893 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1894 return MCDisassembler::Fail; // Tied
1895 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1896 return MCDisassembler::Fail;
1897 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1898 return MCDisassembler::Fail;
1903 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1904 uint64_t Address, const void *Decoder) {
1905 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1906 unsigned M = fieldFromInstruction(Insn, 17, 1);
1907 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1908 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1910 DecodeStatus S = MCDisassembler::Success;
1912 // imod == '01' --> UNPREDICTABLE
1913 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1914 // return failure here. The '01' imod value is unprintable, so there's
1915 // nothing useful we could do even if we returned UNPREDICTABLE.
1917 if (imod == 1) return MCDisassembler::Fail;
1920 Inst.setOpcode(ARM::CPS3p);
1921 Inst.addOperand(MCOperand::CreateImm(imod));
1922 Inst.addOperand(MCOperand::CreateImm(iflags));
1923 Inst.addOperand(MCOperand::CreateImm(mode));
1924 } else if (imod && !M) {
1925 Inst.setOpcode(ARM::CPS2p);
1926 Inst.addOperand(MCOperand::CreateImm(imod));
1927 Inst.addOperand(MCOperand::CreateImm(iflags));
1928 if (mode) S = MCDisassembler::SoftFail;
1929 } else if (!imod && M) {
1930 Inst.setOpcode(ARM::CPS1p);
1931 Inst.addOperand(MCOperand::CreateImm(mode));
1932 if (iflags) S = MCDisassembler::SoftFail;
1934 // imod == '00' && M == '0' --> UNPREDICTABLE
1935 Inst.setOpcode(ARM::CPS1p);
1936 Inst.addOperand(MCOperand::CreateImm(mode));
1937 S = MCDisassembler::SoftFail;
1943 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1944 uint64_t Address, const void *Decoder) {
1945 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1946 unsigned M = fieldFromInstruction(Insn, 8, 1);
1947 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1948 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1950 DecodeStatus S = MCDisassembler::Success;
1952 // imod == '01' --> UNPREDICTABLE
1953 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1954 // return failure here. The '01' imod value is unprintable, so there's
1955 // nothing useful we could do even if we returned UNPREDICTABLE.
1957 if (imod == 1) return MCDisassembler::Fail;
1960 Inst.setOpcode(ARM::t2CPS3p);
1961 Inst.addOperand(MCOperand::CreateImm(imod));
1962 Inst.addOperand(MCOperand::CreateImm(iflags));
1963 Inst.addOperand(MCOperand::CreateImm(mode));
1964 } else if (imod && !M) {
1965 Inst.setOpcode(ARM::t2CPS2p);
1966 Inst.addOperand(MCOperand::CreateImm(imod));
1967 Inst.addOperand(MCOperand::CreateImm(iflags));
1968 if (mode) S = MCDisassembler::SoftFail;
1969 } else if (!imod && M) {
1970 Inst.setOpcode(ARM::t2CPS1p);
1971 Inst.addOperand(MCOperand::CreateImm(mode));
1972 if (iflags) S = MCDisassembler::SoftFail;
1974 // imod == '00' && M == '0' --> this is a HINT instruction
1975 int imm = fieldFromInstruction(Insn, 0, 8);
1976 // HINT are defined only for immediate in [0..4]
1977 if(imm > 4) return MCDisassembler::Fail;
1978 Inst.setOpcode(ARM::t2HINT);
1979 Inst.addOperand(MCOperand::CreateImm(imm));
1985 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1986 uint64_t Address, const void *Decoder) {
1987 DecodeStatus S = MCDisassembler::Success;
1989 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
1992 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
1993 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
1994 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1995 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
1997 if (Inst.getOpcode() == ARM::t2MOVTi16)
1998 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1999 return MCDisassembler::Fail;
2000 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2001 return MCDisassembler::Fail;
2003 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2004 Inst.addOperand(MCOperand::CreateImm(imm));
2009 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
2010 uint64_t Address, const void *Decoder) {
2011 DecodeStatus S = MCDisassembler::Success;
2013 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2014 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2017 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2018 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2020 if (Inst.getOpcode() == ARM::MOVTi16)
2021 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2022 return MCDisassembler::Fail;
2024 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2025 return MCDisassembler::Fail;
2027 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2028 Inst.addOperand(MCOperand::CreateImm(imm));
2030 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2031 return MCDisassembler::Fail;
2036 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2037 uint64_t Address, const void *Decoder) {
2038 DecodeStatus S = MCDisassembler::Success;
2040 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2041 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2042 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2043 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2044 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2047 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2049 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2050 return MCDisassembler::Fail;
2051 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2052 return MCDisassembler::Fail;
2053 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2054 return MCDisassembler::Fail;
2055 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2056 return MCDisassembler::Fail;
2058 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2059 return MCDisassembler::Fail;
2064 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2065 uint64_t Address, const void *Decoder) {
2066 DecodeStatus S = MCDisassembler::Success;
2068 unsigned add = fieldFromInstruction(Val, 12, 1);
2069 unsigned imm = fieldFromInstruction(Val, 0, 12);
2070 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2072 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2073 return MCDisassembler::Fail;
2075 if (!add) imm *= -1;
2076 if (imm == 0 && !add) imm = INT32_MIN;
2077 Inst.addOperand(MCOperand::CreateImm(imm));
2079 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2084 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2085 uint64_t Address, const void *Decoder) {
2086 DecodeStatus S = MCDisassembler::Success;
2088 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2089 unsigned U = fieldFromInstruction(Val, 8, 1);
2090 unsigned imm = fieldFromInstruction(Val, 0, 8);
2092 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2093 return MCDisassembler::Fail;
2096 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2098 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2103 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2104 uint64_t Address, const void *Decoder) {
2105 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2109 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2110 uint64_t Address, const void *Decoder) {
2111 DecodeStatus Status = MCDisassembler::Success;
2113 // Note the J1 and J2 values are from the encoded instruction. So here
2114 // change them to I1 and I2 values via as documented:
2115 // I1 = NOT(J1 EOR S);
2116 // I2 = NOT(J2 EOR S);
2117 // and build the imm32 with one trailing zero as documented:
2118 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2119 unsigned S = fieldFromInstruction(Insn, 26, 1);
2120 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2121 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2122 unsigned I1 = !(J1 ^ S);
2123 unsigned I2 = !(J2 ^ S);
2124 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2125 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2126 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2127 int imm32 = SignExtend32<24>(tmp << 1);
2128 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2129 true, 4, Inst, Decoder))
2130 Inst.addOperand(MCOperand::CreateImm(imm32));
2136 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2137 uint64_t Address, const void *Decoder) {
2138 DecodeStatus S = MCDisassembler::Success;
2140 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2141 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2144 Inst.setOpcode(ARM::BLXi);
2145 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2146 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2147 true, 4, Inst, Decoder))
2148 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2152 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2153 true, 4, Inst, Decoder))
2154 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2155 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2156 return MCDisassembler::Fail;
2162 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2163 uint64_t Address, const void *Decoder) {
2164 DecodeStatus S = MCDisassembler::Success;
2166 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2167 unsigned align = fieldFromInstruction(Val, 4, 2);
2169 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2170 return MCDisassembler::Fail;
2172 Inst.addOperand(MCOperand::CreateImm(0));
2174 Inst.addOperand(MCOperand::CreateImm(4 << align));
2179 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2180 uint64_t Address, const void *Decoder) {
2181 DecodeStatus S = MCDisassembler::Success;
2183 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2184 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2185 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2186 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2187 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2188 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2190 // First output register
2191 switch (Inst.getOpcode()) {
2192 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2193 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2194 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2195 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2196 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2197 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2198 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2199 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2200 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2201 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2202 return MCDisassembler::Fail;
2207 case ARM::VLD2b16wb_fixed:
2208 case ARM::VLD2b16wb_register:
2209 case ARM::VLD2b32wb_fixed:
2210 case ARM::VLD2b32wb_register:
2211 case ARM::VLD2b8wb_fixed:
2212 case ARM::VLD2b8wb_register:
2213 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2214 return MCDisassembler::Fail;
2217 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2218 return MCDisassembler::Fail;
2221 // Second output register
2222 switch (Inst.getOpcode()) {
2226 case ARM::VLD3d8_UPD:
2227 case ARM::VLD3d16_UPD:
2228 case ARM::VLD3d32_UPD:
2232 case ARM::VLD4d8_UPD:
2233 case ARM::VLD4d16_UPD:
2234 case ARM::VLD4d32_UPD:
2235 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2236 return MCDisassembler::Fail;
2241 case ARM::VLD3q8_UPD:
2242 case ARM::VLD3q16_UPD:
2243 case ARM::VLD3q32_UPD:
2247 case ARM::VLD4q8_UPD:
2248 case ARM::VLD4q16_UPD:
2249 case ARM::VLD4q32_UPD:
2250 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2251 return MCDisassembler::Fail;
2256 // Third output register
2257 switch(Inst.getOpcode()) {
2261 case ARM::VLD3d8_UPD:
2262 case ARM::VLD3d16_UPD:
2263 case ARM::VLD3d32_UPD:
2267 case ARM::VLD4d8_UPD:
2268 case ARM::VLD4d16_UPD:
2269 case ARM::VLD4d32_UPD:
2270 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2271 return MCDisassembler::Fail;
2276 case ARM::VLD3q8_UPD:
2277 case ARM::VLD3q16_UPD:
2278 case ARM::VLD3q32_UPD:
2282 case ARM::VLD4q8_UPD:
2283 case ARM::VLD4q16_UPD:
2284 case ARM::VLD4q32_UPD:
2285 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2286 return MCDisassembler::Fail;
2292 // Fourth output register
2293 switch (Inst.getOpcode()) {
2297 case ARM::VLD4d8_UPD:
2298 case ARM::VLD4d16_UPD:
2299 case ARM::VLD4d32_UPD:
2300 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2301 return MCDisassembler::Fail;
2306 case ARM::VLD4q8_UPD:
2307 case ARM::VLD4q16_UPD:
2308 case ARM::VLD4q32_UPD:
2309 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2310 return MCDisassembler::Fail;
2316 // Writeback operand
2317 switch (Inst.getOpcode()) {
2318 case ARM::VLD1d8wb_fixed:
2319 case ARM::VLD1d16wb_fixed:
2320 case ARM::VLD1d32wb_fixed:
2321 case ARM::VLD1d64wb_fixed:
2322 case ARM::VLD1d8wb_register:
2323 case ARM::VLD1d16wb_register:
2324 case ARM::VLD1d32wb_register:
2325 case ARM::VLD1d64wb_register:
2326 case ARM::VLD1q8wb_fixed:
2327 case ARM::VLD1q16wb_fixed:
2328 case ARM::VLD1q32wb_fixed:
2329 case ARM::VLD1q64wb_fixed:
2330 case ARM::VLD1q8wb_register:
2331 case ARM::VLD1q16wb_register:
2332 case ARM::VLD1q32wb_register:
2333 case ARM::VLD1q64wb_register:
2334 case ARM::VLD1d8Twb_fixed:
2335 case ARM::VLD1d8Twb_register:
2336 case ARM::VLD1d16Twb_fixed:
2337 case ARM::VLD1d16Twb_register:
2338 case ARM::VLD1d32Twb_fixed:
2339 case ARM::VLD1d32Twb_register:
2340 case ARM::VLD1d64Twb_fixed:
2341 case ARM::VLD1d64Twb_register:
2342 case ARM::VLD1d8Qwb_fixed:
2343 case ARM::VLD1d8Qwb_register:
2344 case ARM::VLD1d16Qwb_fixed:
2345 case ARM::VLD1d16Qwb_register:
2346 case ARM::VLD1d32Qwb_fixed:
2347 case ARM::VLD1d32Qwb_register:
2348 case ARM::VLD1d64Qwb_fixed:
2349 case ARM::VLD1d64Qwb_register:
2350 case ARM::VLD2d8wb_fixed:
2351 case ARM::VLD2d16wb_fixed:
2352 case ARM::VLD2d32wb_fixed:
2353 case ARM::VLD2q8wb_fixed:
2354 case ARM::VLD2q16wb_fixed:
2355 case ARM::VLD2q32wb_fixed:
2356 case ARM::VLD2d8wb_register:
2357 case ARM::VLD2d16wb_register:
2358 case ARM::VLD2d32wb_register:
2359 case ARM::VLD2q8wb_register:
2360 case ARM::VLD2q16wb_register:
2361 case ARM::VLD2q32wb_register:
2362 case ARM::VLD2b8wb_fixed:
2363 case ARM::VLD2b16wb_fixed:
2364 case ARM::VLD2b32wb_fixed:
2365 case ARM::VLD2b8wb_register:
2366 case ARM::VLD2b16wb_register:
2367 case ARM::VLD2b32wb_register:
2368 Inst.addOperand(MCOperand::CreateImm(0));
2370 case ARM::VLD3d8_UPD:
2371 case ARM::VLD3d16_UPD:
2372 case ARM::VLD3d32_UPD:
2373 case ARM::VLD3q8_UPD:
2374 case ARM::VLD3q16_UPD:
2375 case ARM::VLD3q32_UPD:
2376 case ARM::VLD4d8_UPD:
2377 case ARM::VLD4d16_UPD:
2378 case ARM::VLD4d32_UPD:
2379 case ARM::VLD4q8_UPD:
2380 case ARM::VLD4q16_UPD:
2381 case ARM::VLD4q32_UPD:
2382 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2383 return MCDisassembler::Fail;
2389 // AddrMode6 Base (register+alignment)
2390 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2391 return MCDisassembler::Fail;
2393 // AddrMode6 Offset (register)
2394 switch (Inst.getOpcode()) {
2396 // The below have been updated to have explicit am6offset split
2397 // between fixed and register offset. For those instructions not
2398 // yet updated, we need to add an additional reg0 operand for the
2401 // The fixed offset encodes as Rm == 0xd, so we check for that.
2403 Inst.addOperand(MCOperand::CreateReg(0));
2406 // Fall through to handle the register offset variant.
2407 case ARM::VLD1d8wb_fixed:
2408 case ARM::VLD1d16wb_fixed:
2409 case ARM::VLD1d32wb_fixed:
2410 case ARM::VLD1d64wb_fixed:
2411 case ARM::VLD1d8Twb_fixed:
2412 case ARM::VLD1d16Twb_fixed:
2413 case ARM::VLD1d32Twb_fixed:
2414 case ARM::VLD1d64Twb_fixed:
2415 case ARM::VLD1d8Qwb_fixed:
2416 case ARM::VLD1d16Qwb_fixed:
2417 case ARM::VLD1d32Qwb_fixed:
2418 case ARM::VLD1d64Qwb_fixed:
2419 case ARM::VLD1d8wb_register:
2420 case ARM::VLD1d16wb_register:
2421 case ARM::VLD1d32wb_register:
2422 case ARM::VLD1d64wb_register:
2423 case ARM::VLD1q8wb_fixed:
2424 case ARM::VLD1q16wb_fixed:
2425 case ARM::VLD1q32wb_fixed:
2426 case ARM::VLD1q64wb_fixed:
2427 case ARM::VLD1q8wb_register:
2428 case ARM::VLD1q16wb_register:
2429 case ARM::VLD1q32wb_register:
2430 case ARM::VLD1q64wb_register:
2431 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2432 // variant encodes Rm == 0xf. Anything else is a register offset post-
2433 // increment and we need to add the register operand to the instruction.
2434 if (Rm != 0xD && Rm != 0xF &&
2435 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2436 return MCDisassembler::Fail;
2438 case ARM::VLD2d8wb_fixed:
2439 case ARM::VLD2d16wb_fixed:
2440 case ARM::VLD2d32wb_fixed:
2441 case ARM::VLD2b8wb_fixed:
2442 case ARM::VLD2b16wb_fixed:
2443 case ARM::VLD2b32wb_fixed:
2444 case ARM::VLD2q8wb_fixed:
2445 case ARM::VLD2q16wb_fixed:
2446 case ARM::VLD2q32wb_fixed:
2453 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2454 uint64_t Address, const void *Decoder) {
2455 DecodeStatus S = MCDisassembler::Success;
2457 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2458 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2459 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2460 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2461 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2462 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2464 // Writeback Operand
2465 switch (Inst.getOpcode()) {
2466 case ARM::VST1d8wb_fixed:
2467 case ARM::VST1d16wb_fixed:
2468 case ARM::VST1d32wb_fixed:
2469 case ARM::VST1d64wb_fixed:
2470 case ARM::VST1d8wb_register:
2471 case ARM::VST1d16wb_register:
2472 case ARM::VST1d32wb_register:
2473 case ARM::VST1d64wb_register:
2474 case ARM::VST1q8wb_fixed:
2475 case ARM::VST1q16wb_fixed:
2476 case ARM::VST1q32wb_fixed:
2477 case ARM::VST1q64wb_fixed:
2478 case ARM::VST1q8wb_register:
2479 case ARM::VST1q16wb_register:
2480 case ARM::VST1q32wb_register:
2481 case ARM::VST1q64wb_register:
2482 case ARM::VST1d8Twb_fixed:
2483 case ARM::VST1d16Twb_fixed:
2484 case ARM::VST1d32Twb_fixed:
2485 case ARM::VST1d64Twb_fixed:
2486 case ARM::VST1d8Twb_register:
2487 case ARM::VST1d16Twb_register:
2488 case ARM::VST1d32Twb_register:
2489 case ARM::VST1d64Twb_register:
2490 case ARM::VST1d8Qwb_fixed:
2491 case ARM::VST1d16Qwb_fixed:
2492 case ARM::VST1d32Qwb_fixed:
2493 case ARM::VST1d64Qwb_fixed:
2494 case ARM::VST1d8Qwb_register:
2495 case ARM::VST1d16Qwb_register:
2496 case ARM::VST1d32Qwb_register:
2497 case ARM::VST1d64Qwb_register:
2498 case ARM::VST2d8wb_fixed:
2499 case ARM::VST2d16wb_fixed:
2500 case ARM::VST2d32wb_fixed:
2501 case ARM::VST2d8wb_register:
2502 case ARM::VST2d16wb_register:
2503 case ARM::VST2d32wb_register:
2504 case ARM::VST2q8wb_fixed:
2505 case ARM::VST2q16wb_fixed:
2506 case ARM::VST2q32wb_fixed:
2507 case ARM::VST2q8wb_register:
2508 case ARM::VST2q16wb_register:
2509 case ARM::VST2q32wb_register:
2510 case ARM::VST2b8wb_fixed:
2511 case ARM::VST2b16wb_fixed:
2512 case ARM::VST2b32wb_fixed:
2513 case ARM::VST2b8wb_register:
2514 case ARM::VST2b16wb_register:
2515 case ARM::VST2b32wb_register:
2517 return MCDisassembler::Fail;
2518 Inst.addOperand(MCOperand::CreateImm(0));
2520 case ARM::VST3d8_UPD:
2521 case ARM::VST3d16_UPD:
2522 case ARM::VST3d32_UPD:
2523 case ARM::VST3q8_UPD:
2524 case ARM::VST3q16_UPD:
2525 case ARM::VST3q32_UPD:
2526 case ARM::VST4d8_UPD:
2527 case ARM::VST4d16_UPD:
2528 case ARM::VST4d32_UPD:
2529 case ARM::VST4q8_UPD:
2530 case ARM::VST4q16_UPD:
2531 case ARM::VST4q32_UPD:
2532 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2533 return MCDisassembler::Fail;
2539 // AddrMode6 Base (register+alignment)
2540 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2541 return MCDisassembler::Fail;
2543 // AddrMode6 Offset (register)
2544 switch (Inst.getOpcode()) {
2547 Inst.addOperand(MCOperand::CreateReg(0));
2548 else if (Rm != 0xF) {
2549 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2550 return MCDisassembler::Fail;
2553 case ARM::VST1d8wb_fixed:
2554 case ARM::VST1d16wb_fixed:
2555 case ARM::VST1d32wb_fixed:
2556 case ARM::VST1d64wb_fixed:
2557 case ARM::VST1q8wb_fixed:
2558 case ARM::VST1q16wb_fixed:
2559 case ARM::VST1q32wb_fixed:
2560 case ARM::VST1q64wb_fixed:
2561 case ARM::VST1d8Twb_fixed:
2562 case ARM::VST1d16Twb_fixed:
2563 case ARM::VST1d32Twb_fixed:
2564 case ARM::VST1d64Twb_fixed:
2565 case ARM::VST1d8Qwb_fixed:
2566 case ARM::VST1d16Qwb_fixed:
2567 case ARM::VST1d32Qwb_fixed:
2568 case ARM::VST1d64Qwb_fixed:
2569 case ARM::VST2d8wb_fixed:
2570 case ARM::VST2d16wb_fixed:
2571 case ARM::VST2d32wb_fixed:
2572 case ARM::VST2q8wb_fixed:
2573 case ARM::VST2q16wb_fixed:
2574 case ARM::VST2q32wb_fixed:
2575 case ARM::VST2b8wb_fixed:
2576 case ARM::VST2b16wb_fixed:
2577 case ARM::VST2b32wb_fixed:
2582 // First input register
2583 switch (Inst.getOpcode()) {
2588 case ARM::VST1q16wb_fixed:
2589 case ARM::VST1q16wb_register:
2590 case ARM::VST1q32wb_fixed:
2591 case ARM::VST1q32wb_register:
2592 case ARM::VST1q64wb_fixed:
2593 case ARM::VST1q64wb_register:
2594 case ARM::VST1q8wb_fixed:
2595 case ARM::VST1q8wb_register:
2599 case ARM::VST2d16wb_fixed:
2600 case ARM::VST2d16wb_register:
2601 case ARM::VST2d32wb_fixed:
2602 case ARM::VST2d32wb_register:
2603 case ARM::VST2d8wb_fixed:
2604 case ARM::VST2d8wb_register:
2605 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2606 return MCDisassembler::Fail;
2611 case ARM::VST2b16wb_fixed:
2612 case ARM::VST2b16wb_register:
2613 case ARM::VST2b32wb_fixed:
2614 case ARM::VST2b32wb_register:
2615 case ARM::VST2b8wb_fixed:
2616 case ARM::VST2b8wb_register:
2617 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2618 return MCDisassembler::Fail;
2621 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2622 return MCDisassembler::Fail;
2625 // Second input register
2626 switch (Inst.getOpcode()) {
2630 case ARM::VST3d8_UPD:
2631 case ARM::VST3d16_UPD:
2632 case ARM::VST3d32_UPD:
2636 case ARM::VST4d8_UPD:
2637 case ARM::VST4d16_UPD:
2638 case ARM::VST4d32_UPD:
2639 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2640 return MCDisassembler::Fail;
2645 case ARM::VST3q8_UPD:
2646 case ARM::VST3q16_UPD:
2647 case ARM::VST3q32_UPD:
2651 case ARM::VST4q8_UPD:
2652 case ARM::VST4q16_UPD:
2653 case ARM::VST4q32_UPD:
2654 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2655 return MCDisassembler::Fail;
2661 // Third input register
2662 switch (Inst.getOpcode()) {
2666 case ARM::VST3d8_UPD:
2667 case ARM::VST3d16_UPD:
2668 case ARM::VST3d32_UPD:
2672 case ARM::VST4d8_UPD:
2673 case ARM::VST4d16_UPD:
2674 case ARM::VST4d32_UPD:
2675 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2676 return MCDisassembler::Fail;
2681 case ARM::VST3q8_UPD:
2682 case ARM::VST3q16_UPD:
2683 case ARM::VST3q32_UPD:
2687 case ARM::VST4q8_UPD:
2688 case ARM::VST4q16_UPD:
2689 case ARM::VST4q32_UPD:
2690 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2691 return MCDisassembler::Fail;
2697 // Fourth input register
2698 switch (Inst.getOpcode()) {
2702 case ARM::VST4d8_UPD:
2703 case ARM::VST4d16_UPD:
2704 case ARM::VST4d32_UPD:
2705 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2706 return MCDisassembler::Fail;
2711 case ARM::VST4q8_UPD:
2712 case ARM::VST4q16_UPD:
2713 case ARM::VST4q32_UPD:
2714 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2715 return MCDisassembler::Fail;
2724 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2725 uint64_t Address, const void *Decoder) {
2726 DecodeStatus S = MCDisassembler::Success;
2728 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2729 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2730 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2731 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2732 unsigned align = fieldFromInstruction(Insn, 4, 1);
2733 unsigned size = fieldFromInstruction(Insn, 6, 2);
2735 if (size == 0 && align == 1)
2736 return MCDisassembler::Fail;
2737 align *= (1 << size);
2739 switch (Inst.getOpcode()) {
2740 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2741 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2742 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2743 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2744 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2745 return MCDisassembler::Fail;
2748 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2749 return MCDisassembler::Fail;
2753 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2754 return MCDisassembler::Fail;
2757 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2758 return MCDisassembler::Fail;
2759 Inst.addOperand(MCOperand::CreateImm(align));
2761 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2762 // variant encodes Rm == 0xf. Anything else is a register offset post-
2763 // increment and we need to add the register operand to the instruction.
2764 if (Rm != 0xD && Rm != 0xF &&
2765 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2766 return MCDisassembler::Fail;
2771 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2772 uint64_t Address, const void *Decoder) {
2773 DecodeStatus S = MCDisassembler::Success;
2775 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2776 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2777 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2778 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2779 unsigned align = fieldFromInstruction(Insn, 4, 1);
2780 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2783 switch (Inst.getOpcode()) {
2784 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2785 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2786 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2787 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2788 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2789 return MCDisassembler::Fail;
2791 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2792 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2793 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2794 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2795 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2796 return MCDisassembler::Fail;
2799 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2800 return MCDisassembler::Fail;
2805 Inst.addOperand(MCOperand::CreateImm(0));
2807 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2808 return MCDisassembler::Fail;
2809 Inst.addOperand(MCOperand::CreateImm(align));
2811 if (Rm != 0xD && Rm != 0xF) {
2812 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2813 return MCDisassembler::Fail;
2819 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2820 uint64_t Address, const void *Decoder) {
2821 DecodeStatus S = MCDisassembler::Success;
2823 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2824 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2825 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2826 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2827 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2829 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2830 return MCDisassembler::Fail;
2831 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2832 return MCDisassembler::Fail;
2833 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2834 return MCDisassembler::Fail;
2836 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2837 return MCDisassembler::Fail;
2840 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2841 return MCDisassembler::Fail;
2842 Inst.addOperand(MCOperand::CreateImm(0));
2845 Inst.addOperand(MCOperand::CreateReg(0));
2846 else if (Rm != 0xF) {
2847 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2848 return MCDisassembler::Fail;
2854 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2855 uint64_t Address, const void *Decoder) {
2856 DecodeStatus S = MCDisassembler::Success;
2858 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2859 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2860 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2861 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2862 unsigned size = fieldFromInstruction(Insn, 6, 2);
2863 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2864 unsigned align = fieldFromInstruction(Insn, 4, 1);
2868 return MCDisassembler::Fail;
2881 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2882 return MCDisassembler::Fail;
2883 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2884 return MCDisassembler::Fail;
2885 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2886 return MCDisassembler::Fail;
2887 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2888 return MCDisassembler::Fail;
2890 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2891 return MCDisassembler::Fail;
2894 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2895 return MCDisassembler::Fail;
2896 Inst.addOperand(MCOperand::CreateImm(align));
2899 Inst.addOperand(MCOperand::CreateReg(0));
2900 else if (Rm != 0xF) {
2901 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2902 return MCDisassembler::Fail;
2909 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2910 uint64_t Address, const void *Decoder) {
2911 DecodeStatus S = MCDisassembler::Success;
2913 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2914 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2915 unsigned imm = fieldFromInstruction(Insn, 0, 4);
2916 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2917 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2918 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2919 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2920 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2923 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2924 return MCDisassembler::Fail;
2926 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2927 return MCDisassembler::Fail;
2930 Inst.addOperand(MCOperand::CreateImm(imm));
2932 switch (Inst.getOpcode()) {
2933 case ARM::VORRiv4i16:
2934 case ARM::VORRiv2i32:
2935 case ARM::VBICiv4i16:
2936 case ARM::VBICiv2i32:
2937 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2938 return MCDisassembler::Fail;
2940 case ARM::VORRiv8i16:
2941 case ARM::VORRiv4i32:
2942 case ARM::VBICiv8i16:
2943 case ARM::VBICiv4i32:
2944 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2945 return MCDisassembler::Fail;
2954 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2955 uint64_t Address, const void *Decoder) {
2956 DecodeStatus S = MCDisassembler::Success;
2958 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2959 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2960 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2961 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2962 unsigned size = fieldFromInstruction(Insn, 18, 2);
2964 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2965 return MCDisassembler::Fail;
2966 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2967 return MCDisassembler::Fail;
2968 Inst.addOperand(MCOperand::CreateImm(8 << size));
2973 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2974 uint64_t Address, const void *Decoder) {
2975 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2976 return MCDisassembler::Success;
2979 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2980 uint64_t Address, const void *Decoder) {
2981 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2982 return MCDisassembler::Success;
2985 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2986 uint64_t Address, const void *Decoder) {
2987 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2988 return MCDisassembler::Success;
2991 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2992 uint64_t Address, const void *Decoder) {
2993 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2994 return MCDisassembler::Success;
2997 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2998 uint64_t Address, const void *Decoder) {
2999 DecodeStatus S = MCDisassembler::Success;
3001 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3002 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3003 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3004 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
3005 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3006 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3007 unsigned op = fieldFromInstruction(Insn, 6, 1);
3009 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3010 return MCDisassembler::Fail;
3012 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3013 return MCDisassembler::Fail; // Writeback
3016 switch (Inst.getOpcode()) {
3019 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3020 return MCDisassembler::Fail;
3023 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3024 return MCDisassembler::Fail;
3027 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3028 return MCDisassembler::Fail;
3033 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3034 uint64_t Address, const void *Decoder) {
3035 DecodeStatus S = MCDisassembler::Success;
3037 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3038 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3040 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3041 return MCDisassembler::Fail;
3043 switch(Inst.getOpcode()) {
3045 return MCDisassembler::Fail;
3047 break; // tADR does not explicitly represent the PC as an operand.
3049 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3053 Inst.addOperand(MCOperand::CreateImm(imm));
3057 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3058 uint64_t Address, const void *Decoder) {
3059 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3060 true, 2, Inst, Decoder))
3061 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3062 return MCDisassembler::Success;
3065 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3066 uint64_t Address, const void *Decoder) {
3067 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3068 true, 4, Inst, Decoder))
3069 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3070 return MCDisassembler::Success;
3073 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3074 uint64_t Address, const void *Decoder) {
3075 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3076 true, 2, Inst, Decoder))
3077 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3078 return MCDisassembler::Success;
3081 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3082 uint64_t Address, const void *Decoder) {
3083 DecodeStatus S = MCDisassembler::Success;
3085 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3086 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3088 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3089 return MCDisassembler::Fail;
3090 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3091 return MCDisassembler::Fail;
3096 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3097 uint64_t Address, const void *Decoder) {
3098 DecodeStatus S = MCDisassembler::Success;
3100 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3101 unsigned imm = fieldFromInstruction(Val, 3, 5);
3103 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3104 return MCDisassembler::Fail;
3105 Inst.addOperand(MCOperand::CreateImm(imm));
3110 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3111 uint64_t Address, const void *Decoder) {
3112 unsigned imm = Val << 2;
3114 Inst.addOperand(MCOperand::CreateImm(imm));
3115 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3117 return MCDisassembler::Success;
3120 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3121 uint64_t Address, const void *Decoder) {
3122 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3123 Inst.addOperand(MCOperand::CreateImm(Val));
3125 return MCDisassembler::Success;
3128 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3129 uint64_t Address, const void *Decoder) {
3130 DecodeStatus S = MCDisassembler::Success;
3132 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3133 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3134 unsigned imm = fieldFromInstruction(Val, 0, 2);
3136 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3137 return MCDisassembler::Fail;
3138 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3139 return MCDisassembler::Fail;
3140 Inst.addOperand(MCOperand::CreateImm(imm));
3145 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3146 uint64_t Address, const void *Decoder) {
3147 DecodeStatus S = MCDisassembler::Success;
3149 switch (Inst.getOpcode()) {
3155 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3156 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3157 return MCDisassembler::Fail;
3161 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3163 switch (Inst.getOpcode()) {
3165 Inst.setOpcode(ARM::t2LDRBpci);
3168 Inst.setOpcode(ARM::t2LDRHpci);
3171 Inst.setOpcode(ARM::t2LDRSHpci);
3174 Inst.setOpcode(ARM::t2LDRSBpci);
3177 Inst.setOpcode(ARM::t2PLDi12);
3178 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3181 return MCDisassembler::Fail;
3184 int imm = fieldFromInstruction(Insn, 0, 12);
3185 if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
3186 Inst.addOperand(MCOperand::CreateImm(imm));
3191 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3192 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3193 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3194 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3195 return MCDisassembler::Fail;
3200 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3201 uint64_t Address, const void *Decoder) {
3203 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3205 int imm = Val & 0xFF;
3207 if (!(Val & 0x100)) imm *= -1;
3208 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3211 return MCDisassembler::Success;
3214 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3215 uint64_t Address, const void *Decoder) {
3216 DecodeStatus S = MCDisassembler::Success;
3218 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3219 unsigned imm = fieldFromInstruction(Val, 0, 9);
3221 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3222 return MCDisassembler::Fail;
3223 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3224 return MCDisassembler::Fail;
3229 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3230 uint64_t Address, const void *Decoder) {
3231 DecodeStatus S = MCDisassembler::Success;
3233 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3234 unsigned imm = fieldFromInstruction(Val, 0, 8);
3236 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3237 return MCDisassembler::Fail;
3239 Inst.addOperand(MCOperand::CreateImm(imm));
3244 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3245 uint64_t Address, const void *Decoder) {
3246 int imm = Val & 0xFF;
3249 else if (!(Val & 0x100))
3251 Inst.addOperand(MCOperand::CreateImm(imm));
3253 return MCDisassembler::Success;
3257 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3258 uint64_t Address, const void *Decoder) {
3259 DecodeStatus S = MCDisassembler::Success;
3261 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3262 unsigned imm = fieldFromInstruction(Val, 0, 9);
3264 // Some instructions always use an additive offset.
3265 switch (Inst.getOpcode()) {
3280 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3281 return MCDisassembler::Fail;
3282 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3283 return MCDisassembler::Fail;
3288 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3289 uint64_t Address, const void *Decoder) {
3290 DecodeStatus S = MCDisassembler::Success;
3292 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3293 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3294 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3295 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3297 unsigned load = fieldFromInstruction(Insn, 20, 1);
3300 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3301 return MCDisassembler::Fail;
3304 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3305 return MCDisassembler::Fail;
3308 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3309 return MCDisassembler::Fail;
3312 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3313 return MCDisassembler::Fail;
3318 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3319 uint64_t Address, const void *Decoder) {
3320 DecodeStatus S = MCDisassembler::Success;
3322 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3323 unsigned imm = fieldFromInstruction(Val, 0, 12);
3325 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3326 return MCDisassembler::Fail;
3327 Inst.addOperand(MCOperand::CreateImm(imm));
3333 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3334 uint64_t Address, const void *Decoder) {
3335 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3337 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3338 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3339 Inst.addOperand(MCOperand::CreateImm(imm));
3341 return MCDisassembler::Success;
3344 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3345 uint64_t Address, const void *Decoder) {
3346 DecodeStatus S = MCDisassembler::Success;
3348 if (Inst.getOpcode() == ARM::tADDrSP) {
3349 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3350 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3352 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3353 return MCDisassembler::Fail;
3354 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3355 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3356 return MCDisassembler::Fail;
3357 } else if (Inst.getOpcode() == ARM::tADDspr) {
3358 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3360 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3361 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3362 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3363 return MCDisassembler::Fail;
3369 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3370 uint64_t Address, const void *Decoder) {
3371 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3372 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3374 Inst.addOperand(MCOperand::CreateImm(imod));
3375 Inst.addOperand(MCOperand::CreateImm(flags));
3377 return MCDisassembler::Success;
3380 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3381 uint64_t Address, const void *Decoder) {
3382 DecodeStatus S = MCDisassembler::Success;
3383 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3384 unsigned add = fieldFromInstruction(Insn, 4, 1);
3386 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3387 return MCDisassembler::Fail;
3388 Inst.addOperand(MCOperand::CreateImm(add));
3393 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3394 uint64_t Address, const void *Decoder) {
3395 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3396 // Note only one trailing zero not two. Also the J1 and J2 values are from
3397 // the encoded instruction. So here change to I1 and I2 values via:
3398 // I1 = NOT(J1 EOR S);
3399 // I2 = NOT(J2 EOR S);
3400 // and build the imm32 with two trailing zeros as documented:
3401 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3402 unsigned S = (Val >> 23) & 1;
3403 unsigned J1 = (Val >> 22) & 1;
3404 unsigned J2 = (Val >> 21) & 1;
3405 unsigned I1 = !(J1 ^ S);
3406 unsigned I2 = !(J2 ^ S);
3407 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3408 int imm32 = SignExtend32<25>(tmp << 1);
3410 if (!tryAddingSymbolicOperand(Address,
3411 (Address & ~2u) + imm32 + 4,
3412 true, 4, Inst, Decoder))
3413 Inst.addOperand(MCOperand::CreateImm(imm32));
3414 return MCDisassembler::Success;
3417 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3418 uint64_t Address, const void *Decoder) {
3419 if (Val == 0xA || Val == 0xB)
3420 return MCDisassembler::Fail;
3422 Inst.addOperand(MCOperand::CreateImm(Val));
3423 return MCDisassembler::Success;
3427 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3428 uint64_t Address, const void *Decoder) {
3429 DecodeStatus S = MCDisassembler::Success;
3431 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3432 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3434 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3435 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3436 return MCDisassembler::Fail;
3437 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3438 return MCDisassembler::Fail;
3443 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3444 uint64_t Address, const void *Decoder) {
3445 DecodeStatus S = MCDisassembler::Success;
3447 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3448 if (pred == 0xE || pred == 0xF) {
3449 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3452 return MCDisassembler::Fail;
3454 Inst.setOpcode(ARM::t2DSB);
3457 Inst.setOpcode(ARM::t2DMB);
3460 Inst.setOpcode(ARM::t2ISB);
3464 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3465 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3468 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3469 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3470 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3471 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3472 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3474 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3475 return MCDisassembler::Fail;
3476 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3477 return MCDisassembler::Fail;
3482 // Decode a shifted immediate operand. These basically consist
3483 // of an 8-bit value, and a 4-bit directive that specifies either
3484 // a splat operation or a rotation.
3485 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3486 uint64_t Address, const void *Decoder) {
3487 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3489 unsigned byte = fieldFromInstruction(Val, 8, 2);
3490 unsigned imm = fieldFromInstruction(Val, 0, 8);
3493 Inst.addOperand(MCOperand::CreateImm(imm));
3496 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3499 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3502 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3507 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3508 unsigned rot = fieldFromInstruction(Val, 7, 5);
3509 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3510 Inst.addOperand(MCOperand::CreateImm(imm));
3513 return MCDisassembler::Success;
3517 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3518 uint64_t Address, const void *Decoder){
3519 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3520 true, 2, Inst, Decoder))
3521 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3522 return MCDisassembler::Success;
3525 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3526 uint64_t Address, const void *Decoder){
3527 // Val is passed in as S:J1:J2:imm10:imm11
3528 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3529 // the encoded instruction. So here change to I1 and I2 values via:
3530 // I1 = NOT(J1 EOR S);
3531 // I2 = NOT(J2 EOR S);
3532 // and build the imm32 with one trailing zero as documented:
3533 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3534 unsigned S = (Val >> 23) & 1;
3535 unsigned J1 = (Val >> 22) & 1;
3536 unsigned J2 = (Val >> 21) & 1;
3537 unsigned I1 = !(J1 ^ S);
3538 unsigned I2 = !(J2 ^ S);
3539 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3540 int imm32 = SignExtend32<25>(tmp << 1);
3542 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3543 true, 4, Inst, Decoder))
3544 Inst.addOperand(MCOperand::CreateImm(imm32));
3545 return MCDisassembler::Success;
3548 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3549 uint64_t Address, const void *Decoder) {
3551 return MCDisassembler::Fail;
3553 Inst.addOperand(MCOperand::CreateImm(Val));
3554 return MCDisassembler::Success;
3557 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3558 uint64_t Address, const void *Decoder) {
3559 if (!Val) return MCDisassembler::Fail;
3560 Inst.addOperand(MCOperand::CreateImm(Val));
3561 return MCDisassembler::Success;
3564 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3565 uint64_t Address, const void *Decoder) {
3566 DecodeStatus S = MCDisassembler::Success;
3568 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3569 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3570 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3572 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3574 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3575 return MCDisassembler::Fail;
3576 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3577 return MCDisassembler::Fail;
3578 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3579 return MCDisassembler::Fail;
3580 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3581 return MCDisassembler::Fail;
3587 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3588 uint64_t Address, const void *Decoder){
3589 DecodeStatus S = MCDisassembler::Success;
3591 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3592 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3593 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3594 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3596 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
3597 return MCDisassembler::Fail;
3599 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3600 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3602 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3603 return MCDisassembler::Fail;
3604 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3605 return MCDisassembler::Fail;
3606 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3607 return MCDisassembler::Fail;
3608 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3609 return MCDisassembler::Fail;
3614 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3615 uint64_t Address, const void *Decoder) {
3616 DecodeStatus S = MCDisassembler::Success;
3618 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3619 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3620 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3621 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3622 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3623 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3625 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3627 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3628 return MCDisassembler::Fail;
3629 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3630 return MCDisassembler::Fail;
3631 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3632 return MCDisassembler::Fail;
3633 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3634 return MCDisassembler::Fail;
3639 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3640 uint64_t Address, const void *Decoder) {
3641 DecodeStatus S = MCDisassembler::Success;
3643 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3644 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3645 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3646 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3647 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3648 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3649 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3651 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3652 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3654 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3655 return MCDisassembler::Fail;
3656 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3657 return MCDisassembler::Fail;
3658 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3659 return MCDisassembler::Fail;
3660 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3661 return MCDisassembler::Fail;
3667 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3668 uint64_t Address, const void *Decoder) {
3669 DecodeStatus S = MCDisassembler::Success;
3671 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3672 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3673 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3674 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3675 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3676 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3678 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3680 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3681 return MCDisassembler::Fail;
3682 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3683 return MCDisassembler::Fail;
3684 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3685 return MCDisassembler::Fail;
3686 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3687 return MCDisassembler::Fail;
3692 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3693 uint64_t Address, const void *Decoder) {
3694 DecodeStatus S = MCDisassembler::Success;
3696 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3697 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3698 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3699 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3700 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3701 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3703 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3705 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3706 return MCDisassembler::Fail;
3707 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3708 return MCDisassembler::Fail;
3709 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3710 return MCDisassembler::Fail;
3711 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3712 return MCDisassembler::Fail;
3717 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3718 uint64_t Address, const void *Decoder) {
3719 DecodeStatus S = MCDisassembler::Success;
3721 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3722 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3723 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3724 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3725 unsigned size = fieldFromInstruction(Insn, 10, 2);
3731 return MCDisassembler::Fail;
3733 if (fieldFromInstruction(Insn, 4, 1))
3734 return MCDisassembler::Fail; // UNDEFINED
3735 index = fieldFromInstruction(Insn, 5, 3);
3738 if (fieldFromInstruction(Insn, 5, 1))
3739 return MCDisassembler::Fail; // UNDEFINED
3740 index = fieldFromInstruction(Insn, 6, 2);
3741 if (fieldFromInstruction(Insn, 4, 1))
3745 if (fieldFromInstruction(Insn, 6, 1))
3746 return MCDisassembler::Fail; // UNDEFINED
3747 index = fieldFromInstruction(Insn, 7, 1);
3749 switch (fieldFromInstruction(Insn, 4, 2)) {
3755 return MCDisassembler::Fail;
3760 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3761 return MCDisassembler::Fail;
3762 if (Rm != 0xF) { // Writeback
3763 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3764 return MCDisassembler::Fail;
3766 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3767 return MCDisassembler::Fail;
3768 Inst.addOperand(MCOperand::CreateImm(align));
3771 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3772 return MCDisassembler::Fail;
3774 Inst.addOperand(MCOperand::CreateReg(0));
3777 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3778 return MCDisassembler::Fail;
3779 Inst.addOperand(MCOperand::CreateImm(index));
3784 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3785 uint64_t Address, const void *Decoder) {
3786 DecodeStatus S = MCDisassembler::Success;
3788 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3789 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3790 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3791 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3792 unsigned size = fieldFromInstruction(Insn, 10, 2);
3798 return MCDisassembler::Fail;
3800 if (fieldFromInstruction(Insn, 4, 1))
3801 return MCDisassembler::Fail; // UNDEFINED
3802 index = fieldFromInstruction(Insn, 5, 3);
3805 if (fieldFromInstruction(Insn, 5, 1))
3806 return MCDisassembler::Fail; // UNDEFINED
3807 index = fieldFromInstruction(Insn, 6, 2);
3808 if (fieldFromInstruction(Insn, 4, 1))
3812 if (fieldFromInstruction(Insn, 6, 1))
3813 return MCDisassembler::Fail; // UNDEFINED
3814 index = fieldFromInstruction(Insn, 7, 1);
3816 switch (fieldFromInstruction(Insn, 4, 2)) {
3822 return MCDisassembler::Fail;
3827 if (Rm != 0xF) { // Writeback
3828 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3829 return MCDisassembler::Fail;
3831 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3832 return MCDisassembler::Fail;
3833 Inst.addOperand(MCOperand::CreateImm(align));
3836 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3837 return MCDisassembler::Fail;
3839 Inst.addOperand(MCOperand::CreateReg(0));
3842 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3843 return MCDisassembler::Fail;
3844 Inst.addOperand(MCOperand::CreateImm(index));
3850 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3851 uint64_t Address, const void *Decoder) {
3852 DecodeStatus S = MCDisassembler::Success;
3854 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3855 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3856 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3857 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3858 unsigned size = fieldFromInstruction(Insn, 10, 2);
3865 return MCDisassembler::Fail;
3867 index = fieldFromInstruction(Insn, 5, 3);
3868 if (fieldFromInstruction(Insn, 4, 1))
3872 index = fieldFromInstruction(Insn, 6, 2);
3873 if (fieldFromInstruction(Insn, 4, 1))
3875 if (fieldFromInstruction(Insn, 5, 1))
3879 if (fieldFromInstruction(Insn, 5, 1))
3880 return MCDisassembler::Fail; // UNDEFINED
3881 index = fieldFromInstruction(Insn, 7, 1);
3882 if (fieldFromInstruction(Insn, 4, 1) != 0)
3884 if (fieldFromInstruction(Insn, 6, 1))
3889 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3890 return MCDisassembler::Fail;
3891 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3892 return MCDisassembler::Fail;
3893 if (Rm != 0xF) { // Writeback
3894 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3895 return MCDisassembler::Fail;
3897 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3898 return MCDisassembler::Fail;
3899 Inst.addOperand(MCOperand::CreateImm(align));
3902 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3903 return MCDisassembler::Fail;
3905 Inst.addOperand(MCOperand::CreateReg(0));
3908 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3909 return MCDisassembler::Fail;
3910 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3911 return MCDisassembler::Fail;
3912 Inst.addOperand(MCOperand::CreateImm(index));
3917 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3918 uint64_t Address, const void *Decoder) {
3919 DecodeStatus S = MCDisassembler::Success;
3921 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3922 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3923 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3924 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3925 unsigned size = fieldFromInstruction(Insn, 10, 2);
3932 return MCDisassembler::Fail;
3934 index = fieldFromInstruction(Insn, 5, 3);
3935 if (fieldFromInstruction(Insn, 4, 1))
3939 index = fieldFromInstruction(Insn, 6, 2);
3940 if (fieldFromInstruction(Insn, 4, 1))
3942 if (fieldFromInstruction(Insn, 5, 1))
3946 if (fieldFromInstruction(Insn, 5, 1))
3947 return MCDisassembler::Fail; // UNDEFINED
3948 index = fieldFromInstruction(Insn, 7, 1);
3949 if (fieldFromInstruction(Insn, 4, 1) != 0)
3951 if (fieldFromInstruction(Insn, 6, 1))
3956 if (Rm != 0xF) { // Writeback
3957 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3958 return MCDisassembler::Fail;
3960 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3961 return MCDisassembler::Fail;
3962 Inst.addOperand(MCOperand::CreateImm(align));
3965 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3966 return MCDisassembler::Fail;
3968 Inst.addOperand(MCOperand::CreateReg(0));
3971 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3972 return MCDisassembler::Fail;
3973 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3974 return MCDisassembler::Fail;
3975 Inst.addOperand(MCOperand::CreateImm(index));
3981 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3982 uint64_t Address, const void *Decoder) {
3983 DecodeStatus S = MCDisassembler::Success;
3985 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3986 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3987 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3988 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3989 unsigned size = fieldFromInstruction(Insn, 10, 2);
3996 return MCDisassembler::Fail;
3998 if (fieldFromInstruction(Insn, 4, 1))
3999 return MCDisassembler::Fail; // UNDEFINED
4000 index = fieldFromInstruction(Insn, 5, 3);
4003 if (fieldFromInstruction(Insn, 4, 1))
4004 return MCDisassembler::Fail; // UNDEFINED
4005 index = fieldFromInstruction(Insn, 6, 2);
4006 if (fieldFromInstruction(Insn, 5, 1))
4010 if (fieldFromInstruction(Insn, 4, 2))
4011 return MCDisassembler::Fail; // UNDEFINED
4012 index = fieldFromInstruction(Insn, 7, 1);
4013 if (fieldFromInstruction(Insn, 6, 1))
4018 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4019 return MCDisassembler::Fail;
4020 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4021 return MCDisassembler::Fail;
4022 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4023 return MCDisassembler::Fail;
4025 if (Rm != 0xF) { // Writeback
4026 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4027 return MCDisassembler::Fail;
4029 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4030 return MCDisassembler::Fail;
4031 Inst.addOperand(MCOperand::CreateImm(align));
4034 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4035 return MCDisassembler::Fail;
4037 Inst.addOperand(MCOperand::CreateReg(0));
4040 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4041 return MCDisassembler::Fail;
4042 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4043 return MCDisassembler::Fail;
4044 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4045 return MCDisassembler::Fail;
4046 Inst.addOperand(MCOperand::CreateImm(index));
4051 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4052 uint64_t Address, const void *Decoder) {
4053 DecodeStatus S = MCDisassembler::Success;
4055 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4056 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4057 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4058 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4059 unsigned size = fieldFromInstruction(Insn, 10, 2);
4066 return MCDisassembler::Fail;
4068 if (fieldFromInstruction(Insn, 4, 1))
4069 return MCDisassembler::Fail; // UNDEFINED
4070 index = fieldFromInstruction(Insn, 5, 3);
4073 if (fieldFromInstruction(Insn, 4, 1))
4074 return MCDisassembler::Fail; // UNDEFINED
4075 index = fieldFromInstruction(Insn, 6, 2);
4076 if (fieldFromInstruction(Insn, 5, 1))
4080 if (fieldFromInstruction(Insn, 4, 2))
4081 return MCDisassembler::Fail; // UNDEFINED
4082 index = fieldFromInstruction(Insn, 7, 1);
4083 if (fieldFromInstruction(Insn, 6, 1))
4088 if (Rm != 0xF) { // Writeback
4089 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4090 return MCDisassembler::Fail;
4092 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4093 return MCDisassembler::Fail;
4094 Inst.addOperand(MCOperand::CreateImm(align));
4097 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4098 return MCDisassembler::Fail;
4100 Inst.addOperand(MCOperand::CreateReg(0));
4103 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4104 return MCDisassembler::Fail;
4105 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4106 return MCDisassembler::Fail;
4107 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4108 return MCDisassembler::Fail;
4109 Inst.addOperand(MCOperand::CreateImm(index));
4115 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4116 uint64_t Address, const void *Decoder) {
4117 DecodeStatus S = MCDisassembler::Success;
4119 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4120 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4121 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4122 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4123 unsigned size = fieldFromInstruction(Insn, 10, 2);
4130 return MCDisassembler::Fail;
4132 if (fieldFromInstruction(Insn, 4, 1))
4134 index = fieldFromInstruction(Insn, 5, 3);
4137 if (fieldFromInstruction(Insn, 4, 1))
4139 index = fieldFromInstruction(Insn, 6, 2);
4140 if (fieldFromInstruction(Insn, 5, 1))
4144 switch (fieldFromInstruction(Insn, 4, 2)) {
4148 return MCDisassembler::Fail;
4150 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4153 index = fieldFromInstruction(Insn, 7, 1);
4154 if (fieldFromInstruction(Insn, 6, 1))
4159 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4160 return MCDisassembler::Fail;
4161 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4162 return MCDisassembler::Fail;
4163 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4164 return MCDisassembler::Fail;
4165 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4166 return MCDisassembler::Fail;
4168 if (Rm != 0xF) { // Writeback
4169 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4170 return MCDisassembler::Fail;
4172 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4173 return MCDisassembler::Fail;
4174 Inst.addOperand(MCOperand::CreateImm(align));
4177 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4178 return MCDisassembler::Fail;
4180 Inst.addOperand(MCOperand::CreateReg(0));
4183 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4184 return MCDisassembler::Fail;
4185 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4186 return MCDisassembler::Fail;
4187 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4188 return MCDisassembler::Fail;
4189 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4190 return MCDisassembler::Fail;
4191 Inst.addOperand(MCOperand::CreateImm(index));
4196 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4197 uint64_t Address, const void *Decoder) {
4198 DecodeStatus S = MCDisassembler::Success;
4200 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4201 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4202 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4203 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4204 unsigned size = fieldFromInstruction(Insn, 10, 2);
4211 return MCDisassembler::Fail;
4213 if (fieldFromInstruction(Insn, 4, 1))
4215 index = fieldFromInstruction(Insn, 5, 3);
4218 if (fieldFromInstruction(Insn, 4, 1))
4220 index = fieldFromInstruction(Insn, 6, 2);
4221 if (fieldFromInstruction(Insn, 5, 1))
4225 switch (fieldFromInstruction(Insn, 4, 2)) {
4229 return MCDisassembler::Fail;
4231 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4234 index = fieldFromInstruction(Insn, 7, 1);
4235 if (fieldFromInstruction(Insn, 6, 1))
4240 if (Rm != 0xF) { // Writeback
4241 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4242 return MCDisassembler::Fail;
4244 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4245 return MCDisassembler::Fail;
4246 Inst.addOperand(MCOperand::CreateImm(align));
4249 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4250 return MCDisassembler::Fail;
4252 Inst.addOperand(MCOperand::CreateReg(0));
4255 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4256 return MCDisassembler::Fail;
4257 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4258 return MCDisassembler::Fail;
4259 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4260 return MCDisassembler::Fail;
4261 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4262 return MCDisassembler::Fail;
4263 Inst.addOperand(MCOperand::CreateImm(index));
4268 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4269 uint64_t Address, const void *Decoder) {
4270 DecodeStatus S = MCDisassembler::Success;
4271 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4272 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4273 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4274 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4275 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4277 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4278 S = MCDisassembler::SoftFail;
4280 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4281 return MCDisassembler::Fail;
4282 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4283 return MCDisassembler::Fail;
4284 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4285 return MCDisassembler::Fail;
4286 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4287 return MCDisassembler::Fail;
4288 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4289 return MCDisassembler::Fail;
4294 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4295 uint64_t Address, const void *Decoder) {
4296 DecodeStatus S = MCDisassembler::Success;
4297 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4298 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4299 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4300 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4301 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4303 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4304 S = MCDisassembler::SoftFail;
4306 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4307 return MCDisassembler::Fail;
4308 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4309 return MCDisassembler::Fail;
4310 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4311 return MCDisassembler::Fail;
4312 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4313 return MCDisassembler::Fail;
4314 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4315 return MCDisassembler::Fail;
4320 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4321 uint64_t Address, const void *Decoder) {
4322 DecodeStatus S = MCDisassembler::Success;
4323 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4324 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4328 S = MCDisassembler::SoftFail;
4333 S = MCDisassembler::SoftFail;
4336 Inst.addOperand(MCOperand::CreateImm(pred));
4337 Inst.addOperand(MCOperand::CreateImm(mask));
4342 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4343 uint64_t Address, const void *Decoder) {
4344 DecodeStatus S = MCDisassembler::Success;
4346 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4347 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4348 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4349 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4350 unsigned W = fieldFromInstruction(Insn, 21, 1);
4351 unsigned U = fieldFromInstruction(Insn, 23, 1);
4352 unsigned P = fieldFromInstruction(Insn, 24, 1);
4353 bool writeback = (W == 1) | (P == 0);
4355 addr |= (U << 8) | (Rn << 9);
4357 if (writeback && (Rn == Rt || Rn == Rt2))
4358 Check(S, MCDisassembler::SoftFail);
4360 Check(S, MCDisassembler::SoftFail);
4363 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4364 return MCDisassembler::Fail;
4366 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4367 return MCDisassembler::Fail;
4368 // Writeback operand
4369 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4370 return MCDisassembler::Fail;
4372 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4373 return MCDisassembler::Fail;
4379 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4380 uint64_t Address, const void *Decoder) {
4381 DecodeStatus S = MCDisassembler::Success;
4383 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4384 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4385 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4386 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4387 unsigned W = fieldFromInstruction(Insn, 21, 1);
4388 unsigned U = fieldFromInstruction(Insn, 23, 1);
4389 unsigned P = fieldFromInstruction(Insn, 24, 1);
4390 bool writeback = (W == 1) | (P == 0);
4392 addr |= (U << 8) | (Rn << 9);
4394 if (writeback && (Rn == Rt || Rn == Rt2))
4395 Check(S, MCDisassembler::SoftFail);
4397 // Writeback operand
4398 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4399 return MCDisassembler::Fail;
4401 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4402 return MCDisassembler::Fail;
4404 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4405 return MCDisassembler::Fail;
4407 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4408 return MCDisassembler::Fail;
4413 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4414 uint64_t Address, const void *Decoder) {
4415 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4416 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4417 if (sign1 != sign2) return MCDisassembler::Fail;
4419 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4420 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4421 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4423 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4425 return MCDisassembler::Success;
4428 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4430 const void *Decoder) {
4431 DecodeStatus S = MCDisassembler::Success;
4433 // Shift of "asr #32" is not allowed in Thumb2 mode.
4434 if (Val == 0x20) S = MCDisassembler::SoftFail;
4435 Inst.addOperand(MCOperand::CreateImm(Val));
4439 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4440 uint64_t Address, const void *Decoder) {
4441 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4442 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4443 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4444 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4447 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4449 DecodeStatus S = MCDisassembler::Success;
4451 if (Rt == Rn || Rn == Rt2)
4452 S = MCDisassembler::SoftFail;
4454 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4455 return MCDisassembler::Fail;
4456 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4457 return MCDisassembler::Fail;
4458 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4459 return MCDisassembler::Fail;
4460 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4461 return MCDisassembler::Fail;
4466 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4467 uint64_t Address, const void *Decoder) {
4468 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4469 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4470 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4471 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4472 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4473 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4475 DecodeStatus S = MCDisassembler::Success;
4477 // VMOVv2f32 is ambiguous with these decodings.
4478 if (!(imm & 0x38) && cmode == 0xF) {
4479 Inst.setOpcode(ARM::VMOVv2f32);
4480 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4483 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4485 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4486 return MCDisassembler::Fail;
4487 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4488 return MCDisassembler::Fail;
4489 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4494 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4495 uint64_t Address, const void *Decoder) {
4496 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4497 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4498 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4499 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4500 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4501 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4503 DecodeStatus S = MCDisassembler::Success;
4505 // VMOVv4f32 is ambiguous with these decodings.
4506 if (!(imm & 0x38) && cmode == 0xF) {
4507 Inst.setOpcode(ARM::VMOVv4f32);
4508 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4511 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4513 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4514 return MCDisassembler::Fail;
4515 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4516 return MCDisassembler::Fail;
4517 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4522 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
4523 const void *Decoder)
4525 unsigned Imm = fieldFromInstruction(Insn, 0, 3);
4526 if (Imm > 4) return MCDisassembler::Fail;
4527 Inst.addOperand(MCOperand::CreateImm(Imm));
4528 return MCDisassembler::Success;
4531 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4532 uint64_t Address, const void *Decoder) {
4533 DecodeStatus S = MCDisassembler::Success;
4535 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4536 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4537 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4538 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4539 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4541 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4542 S = MCDisassembler::SoftFail;
4544 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4545 return MCDisassembler::Fail;
4546 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4547 return MCDisassembler::Fail;
4548 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4549 return MCDisassembler::Fail;
4550 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4551 return MCDisassembler::Fail;
4552 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4553 return MCDisassembler::Fail;
4558 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4559 uint64_t Address, const void *Decoder) {
4561 DecodeStatus S = MCDisassembler::Success;
4563 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4564 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4565 unsigned cop = fieldFromInstruction(Val, 8, 4);
4566 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4567 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4569 if ((cop & ~0x1) == 0xa)
4570 return MCDisassembler::Fail;
4573 S = MCDisassembler::SoftFail;
4575 Inst.addOperand(MCOperand::CreateImm(cop));
4576 Inst.addOperand(MCOperand::CreateImm(opc1));
4577 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4578 return MCDisassembler::Fail;
4579 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4580 return MCDisassembler::Fail;
4581 Inst.addOperand(MCOperand::CreateImm(CRm));