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"
13 #include "ARMSubtarget.h"
14 #include "MCTargetDesc/ARMAddressingModes.h"
15 #include "MCTargetDesc/ARMMCExpr.h"
16 #include "MCTargetDesc/ARMBaseInfo.h"
17 #include "llvm/MC/EDInstInfo.h"
18 #include "llvm/MC/MCInst.h"
19 #include "llvm/MC/MCInstrDesc.h"
20 #include "llvm/MC/MCExpr.h"
21 #include "llvm/MC/MCContext.h"
22 #include "llvm/MC/MCDisassembler.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Support/MemoryObject.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/TargetRegistry.h"
27 #include "llvm/Support/raw_ostream.h"
31 typedef MCDisassembler::DecodeStatus DecodeStatus;
34 /// ARMDisassembler - ARM disassembler for all ARM platforms.
35 class ARMDisassembler : public MCDisassembler {
37 /// Constructor - Initializes the disassembler.
39 ARMDisassembler(const MCSubtargetInfo &STI) :
46 /// getInstruction - See MCDisassembler.
47 DecodeStatus getInstruction(MCInst &instr,
49 const MemoryObject ®ion,
52 raw_ostream &cStream) const;
54 /// getEDInfo - See MCDisassembler.
55 const EDInstInfo *getEDInfo() const;
59 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
60 class ThumbDisassembler : public MCDisassembler {
62 /// Constructor - Initializes the disassembler.
64 ThumbDisassembler(const MCSubtargetInfo &STI) :
68 ~ThumbDisassembler() {
71 /// getInstruction - See MCDisassembler.
72 DecodeStatus getInstruction(MCInst &instr,
74 const MemoryObject ®ion,
77 raw_ostream &cStream) const;
79 /// getEDInfo - See MCDisassembler.
80 const EDInstInfo *getEDInfo() const;
82 mutable std::vector<unsigned> ITBlock;
83 DecodeStatus AddThumbPredicate(MCInst&) const;
84 void UpdateThumbVFPPredicate(MCInst&) const;
88 static bool Check(DecodeStatus &Out, DecodeStatus In) {
90 case MCDisassembler::Success:
91 // Out stays the same.
93 case MCDisassembler::SoftFail:
96 case MCDisassembler::Fail:
100 llvm_unreachable("Invalid DecodeStatus!");
104 // Forward declare these because the autogenerated code will reference them.
105 // Definitions are further down.
106 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
107 uint64_t Address, const void *Decoder);
108 static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
109 unsigned RegNo, uint64_t Address,
110 const void *Decoder);
111 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
112 uint64_t Address, const void *Decoder);
113 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
114 uint64_t Address, const void *Decoder);
115 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
116 uint64_t Address, const void *Decoder);
117 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
118 uint64_t Address, const void *Decoder);
119 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
120 uint64_t Address, const void *Decoder);
121 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
122 uint64_t Address, const void *Decoder);
123 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
126 const void *Decoder);
127 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
128 uint64_t Address, const void *Decoder);
129 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
130 uint64_t Address, const void *Decoder);
131 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
132 unsigned RegNo, uint64_t Address,
133 const void *Decoder);
135 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
136 uint64_t Address, const void *Decoder);
137 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
138 uint64_t Address, const void *Decoder);
139 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
140 uint64_t Address, const void *Decoder);
141 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
142 uint64_t Address, const void *Decoder);
143 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
144 uint64_t Address, const void *Decoder);
145 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
146 uint64_t Address, const void *Decoder);
148 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
149 uint64_t Address, const void *Decoder);
150 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
151 uint64_t Address, const void *Decoder);
152 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
155 const void *Decoder);
156 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
157 uint64_t Address, const void *Decoder);
158 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
159 uint64_t Address, const void *Decoder);
160 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
161 uint64_t Address, const void *Decoder);
162 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
163 uint64_t Address, const void *Decoder);
165 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
168 const void *Decoder);
169 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
170 uint64_t Address, const void *Decoder);
171 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
172 uint64_t Address, const void *Decoder);
173 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
174 uint64_t Address, const void *Decoder);
175 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
176 uint64_t Address, const void *Decoder);
177 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
178 uint64_t Address, const void *Decoder);
179 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
180 uint64_t Address, const void *Decoder);
181 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
182 uint64_t Address, const void *Decoder);
183 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
184 uint64_t Address, const void *Decoder);
185 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
186 uint64_t Address, const void *Decoder);
187 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
188 uint64_t Address, const void *Decoder);
189 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
190 uint64_t Address, const void *Decoder);
191 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
192 uint64_t Address, const void *Decoder);
193 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
194 uint64_t Address, const void *Decoder);
195 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
196 uint64_t Address, const void *Decoder);
197 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
198 uint64_t Address, const void *Decoder);
199 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
200 uint64_t Address, const void *Decoder);
201 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
202 uint64_t Address, const void *Decoder);
203 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
204 uint64_t Address, const void *Decoder);
205 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
206 uint64_t Address, const void *Decoder);
207 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
208 uint64_t Address, const void *Decoder);
209 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
210 uint64_t Address, const void *Decoder);
211 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
212 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
214 uint64_t Address, const void *Decoder);
215 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
216 uint64_t Address, const void *Decoder);
217 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
218 uint64_t Address, const void *Decoder);
219 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
220 uint64_t Address, const void *Decoder);
221 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
222 uint64_t Address, const void *Decoder);
223 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
224 uint64_t Address, const void *Decoder);
225 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
226 uint64_t Address, const void *Decoder);
227 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
228 uint64_t Address, const void *Decoder);
229 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
230 uint64_t Address, const void *Decoder);
231 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
232 uint64_t Address, const void *Decoder);
233 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
234 uint64_t Address, const void *Decoder);
235 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
236 uint64_t Address, const void *Decoder);
237 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
238 uint64_t Address, const void *Decoder);
239 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
240 uint64_t Address, const void *Decoder);
241 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
242 uint64_t Address, const void *Decoder);
243 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
244 uint64_t Address, const void *Decoder);
245 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
246 uint64_t Address, const void *Decoder);
247 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
248 uint64_t Address, const void *Decoder);
249 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
250 uint64_t Address, const void *Decoder);
251 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
252 uint64_t Address, const void *Decoder);
253 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
254 uint64_t Address, const void *Decoder);
255 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
256 uint64_t Address, const void *Decoder);
257 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
258 uint64_t Address, const void *Decoder);
259 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
260 uint64_t Address, const void *Decoder);
263 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
264 uint64_t Address, const void *Decoder);
265 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
266 uint64_t Address, const void *Decoder);
267 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
268 uint64_t Address, const void *Decoder);
269 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
270 uint64_t Address, const void *Decoder);
271 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
272 uint64_t Address, const void *Decoder);
273 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
274 uint64_t Address, const void *Decoder);
275 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
276 uint64_t Address, const void *Decoder);
277 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
278 uint64_t Address, const void *Decoder);
279 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
280 uint64_t Address, const void *Decoder);
281 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
282 uint64_t Address, const void *Decoder);
283 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
284 uint64_t Address, const void *Decoder);
285 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
286 uint64_t Address, const void *Decoder);
287 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
288 uint64_t Address, const void *Decoder);
289 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
290 uint64_t Address, const void *Decoder);
291 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
292 uint64_t Address, const void *Decoder);
293 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
294 uint64_t Address, const void *Decoder);
295 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
296 uint64_t Address, const void *Decoder);
297 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
298 uint64_t Address, const void *Decoder);
299 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
300 uint64_t Address, const void *Decoder);
301 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
302 uint64_t Address, const void *Decoder);
303 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
304 uint64_t Address, const void *Decoder);
305 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
306 uint64_t Address, const void *Decoder);
307 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
308 uint64_t Address, const void *Decoder);
309 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
310 uint64_t Address, const void *Decoder);
311 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
312 uint64_t Address, const void *Decoder);
313 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
314 uint64_t Address, const void *Decoder);
315 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
316 uint64_t Address, const void *Decoder);
317 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
318 uint64_t Address, const void *Decoder);
319 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
320 uint64_t Address, const void *Decoder);
321 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
322 uint64_t Address, const void *Decoder);
323 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
324 uint64_t Address, const void *Decoder);
326 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
327 uint64_t Address, const void *Decoder);
328 #include "ARMGenDisassemblerTables.inc"
329 #include "ARMGenInstrInfo.inc"
330 #include "ARMGenEDInfo.inc"
332 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
333 return new ARMDisassembler(STI);
336 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
337 return new ThumbDisassembler(STI);
340 const EDInstInfo *ARMDisassembler::getEDInfo() const {
344 const EDInstInfo *ThumbDisassembler::getEDInfo() const {
348 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
349 const MemoryObject &Region,
352 raw_ostream &cs) const {
357 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
358 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
360 // We want to read exactly 4 bytes of data.
361 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
363 return MCDisassembler::Fail;
366 // Encoded as a small-endian 32-bit word in the stream.
367 uint32_t insn = (bytes[3] << 24) |
372 // Calling the auto-generated decoder function.
373 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
374 if (result != MCDisassembler::Fail) {
379 // VFP and NEON instructions, similarly, are shared between ARM
382 result = decodeVFPInstruction32(MI, insn, Address, this, STI);
383 if (result != MCDisassembler::Fail) {
389 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
390 if (result != MCDisassembler::Fail) {
392 // Add a fake predicate operand, because we share these instruction
393 // definitions with Thumb2 where these instructions are predicable.
394 if (!DecodePredicateOperand(MI, 0xE, Address, this))
395 return MCDisassembler::Fail;
400 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
401 if (result != MCDisassembler::Fail) {
403 // Add a fake predicate operand, because we share these instruction
404 // definitions with Thumb2 where these instructions are predicable.
405 if (!DecodePredicateOperand(MI, 0xE, Address, this))
406 return MCDisassembler::Fail;
411 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
412 if (result != MCDisassembler::Fail) {
414 // Add a fake predicate operand, because we share these instruction
415 // definitions with Thumb2 where these instructions are predicable.
416 if (!DecodePredicateOperand(MI, 0xE, Address, this))
417 return MCDisassembler::Fail;
424 return MCDisassembler::Fail;
428 extern const MCInstrDesc ARMInsts[];
431 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
432 /// immediate Value in the MCInst. The immediate Value has had any PC
433 /// adjustment made by the caller. If the instruction is a branch instruction
434 /// then isBranch is true, else false. If the getOpInfo() function was set as
435 /// part of the setupForSymbolicDisassembly() call then that function is called
436 /// to get any symbolic information at the Address for this instruction. If
437 /// that returns non-zero then the symbolic information it returns is used to
438 /// create an MCExpr and that is added as an operand to the MCInst. If
439 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
440 /// Value is done and if a symbol is found an MCExpr is created with that, else
441 /// an MCExpr with Value is created. This function returns true if it adds an
442 /// operand to the MCInst and false otherwise.
443 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
444 bool isBranch, uint64_t InstSize,
445 MCInst &MI, const void *Decoder) {
446 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
447 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
448 struct LLVMOpInfo1 SymbolicOp;
449 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
450 SymbolicOp.Value = Value;
451 void *DisInfo = Dis->getDisInfoBlock();
454 !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
455 // Clear SymbolicOp.Value from above and also all other fields.
456 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
457 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
460 uint64_t ReferenceType;
462 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
464 ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
465 const char *ReferenceName;
466 const char *Name = SymbolLookUp(DisInfo, Value, &ReferenceType, Address,
469 SymbolicOp.AddSymbol.Name = Name;
470 SymbolicOp.AddSymbol.Present = true;
472 // For branches always create an MCExpr so it gets printed as hex address.
474 SymbolicOp.Value = Value;
476 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
477 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
478 if (!Name && !isBranch)
482 MCContext *Ctx = Dis->getMCContext();
483 const MCExpr *Add = NULL;
484 if (SymbolicOp.AddSymbol.Present) {
485 if (SymbolicOp.AddSymbol.Name) {
486 StringRef Name(SymbolicOp.AddSymbol.Name);
487 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
488 Add = MCSymbolRefExpr::Create(Sym, *Ctx);
490 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
494 const MCExpr *Sub = NULL;
495 if (SymbolicOp.SubtractSymbol.Present) {
496 if (SymbolicOp.SubtractSymbol.Name) {
497 StringRef Name(SymbolicOp.SubtractSymbol.Name);
498 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
499 Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
501 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
505 const MCExpr *Off = NULL;
506 if (SymbolicOp.Value != 0)
507 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
513 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
515 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
517 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
522 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
529 Expr = MCConstantExpr::Create(0, *Ctx);
532 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
533 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
534 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
535 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
536 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
537 MI.addOperand(MCOperand::CreateExpr(Expr));
539 llvm_unreachable("bad SymbolicOp.VariantKind");
544 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
545 /// referenced by a load instruction with the base register that is the Pc.
546 /// These can often be values in a literal pool near the Address of the
547 /// instruction. The Address of the instruction and its immediate Value are
548 /// used as a possible literal pool entry. The SymbolLookUp call back will
549 /// return the name of a symbol referenced by the the literal pool's entry if
550 /// the referenced address is that of a symbol. Or it will return a pointer to
551 /// a literal 'C' string if the referenced address of the literal pool's entry
552 /// is an address into a section with 'C' string literals.
553 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
554 const void *Decoder) {
555 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
556 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
558 void *DisInfo = Dis->getDisInfoBlock();
559 uint64_t ReferenceType;
560 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
561 const char *ReferenceName;
562 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
563 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
564 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
565 (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
569 // Thumb1 instructions don't have explicit S bits. Rather, they
570 // implicitly set CPSR. Since it's not represented in the encoding, the
571 // auto-generated decoder won't inject the CPSR operand. We need to fix
572 // that as a post-pass.
573 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
574 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
575 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
576 MCInst::iterator I = MI.begin();
577 for (unsigned i = 0; i < NumOps; ++i, ++I) {
578 if (I == MI.end()) break;
579 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
580 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
581 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
586 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
589 // Most Thumb instructions don't have explicit predicates in the
590 // encoding, but rather get their predicates from IT context. We need
591 // to fix up the predicate operands using this context information as a
593 MCDisassembler::DecodeStatus
594 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
595 MCDisassembler::DecodeStatus S = Success;
597 // A few instructions actually have predicates encoded in them. Don't
598 // try to overwrite it if we're seeing one of those.
599 switch (MI.getOpcode()) {
610 // Some instructions (mostly conditional branches) are not
611 // allowed in IT blocks.
612 if (!ITBlock.empty())
621 // Some instructions (mostly unconditional branches) can
622 // only appears at the end of, or outside of, an IT.
623 if (ITBlock.size() > 1)
630 // If we're in an IT block, base the predicate on that. Otherwise,
631 // assume a predicate of AL.
633 if (!ITBlock.empty()) {
641 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
642 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
643 MCInst::iterator I = MI.begin();
644 for (unsigned i = 0; i < NumOps; ++i, ++I) {
645 if (I == MI.end()) break;
646 if (OpInfo[i].isPredicate()) {
647 I = MI.insert(I, MCOperand::CreateImm(CC));
650 MI.insert(I, MCOperand::CreateReg(0));
652 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
657 I = MI.insert(I, MCOperand::CreateImm(CC));
660 MI.insert(I, MCOperand::CreateReg(0));
662 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
667 // Thumb VFP instructions are a special case. Because we share their
668 // encodings between ARM and Thumb modes, and they are predicable in ARM
669 // mode, the auto-generated decoder will give them an (incorrect)
670 // predicate operand. We need to rewrite these operands based on the IT
671 // context as a post-pass.
672 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
674 if (!ITBlock.empty()) {
680 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
681 MCInst::iterator I = MI.begin();
682 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
683 for (unsigned i = 0; i < NumOps; ++i, ++I) {
684 if (OpInfo[i].isPredicate() ) {
690 I->setReg(ARM::CPSR);
696 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
697 const MemoryObject &Region,
700 raw_ostream &cs) const {
705 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
706 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
708 // We want to read exactly 2 bytes of data.
709 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
711 return MCDisassembler::Fail;
714 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
715 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
716 if (result != MCDisassembler::Fail) {
718 Check(result, AddThumbPredicate(MI));
723 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
726 bool InITBlock = !ITBlock.empty();
727 Check(result, AddThumbPredicate(MI));
728 AddThumb1SBit(MI, InITBlock);
733 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
734 if (result != MCDisassembler::Fail) {
737 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
738 // the Thumb predicate.
739 if (MI.getOpcode() == ARM::t2IT && !ITBlock.empty())
740 result = MCDisassembler::SoftFail;
742 Check(result, AddThumbPredicate(MI));
744 // If we find an IT instruction, we need to parse its condition
745 // code and mask operands so that we can apply them correctly
746 // to the subsequent instructions.
747 if (MI.getOpcode() == ARM::t2IT) {
749 // (3 - the number of trailing zeros) is the number of then / else.
750 unsigned firstcond = MI.getOperand(0).getImm();
751 unsigned Mask = MI.getOperand(1).getImm();
752 unsigned CondBit0 = Mask >> 4 & 1;
753 unsigned NumTZ = CountTrailingZeros_32(Mask);
754 assert(NumTZ <= 3 && "Invalid IT mask!");
755 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
756 bool T = ((Mask >> Pos) & 1) == CondBit0;
758 ITBlock.insert(ITBlock.begin(), firstcond);
760 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
763 ITBlock.push_back(firstcond);
769 // We want to read exactly 4 bytes of data.
770 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
772 return MCDisassembler::Fail;
775 uint32_t insn32 = (bytes[3] << 8) |
780 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
781 if (result != MCDisassembler::Fail) {
783 bool InITBlock = ITBlock.size();
784 Check(result, AddThumbPredicate(MI));
785 AddThumb1SBit(MI, InITBlock);
790 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
791 if (result != MCDisassembler::Fail) {
793 Check(result, AddThumbPredicate(MI));
798 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
799 if (result != MCDisassembler::Fail) {
801 UpdateThumbVFPPredicate(MI);
806 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
807 if (result != MCDisassembler::Fail) {
809 Check(result, AddThumbPredicate(MI));
813 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
815 uint32_t NEONLdStInsn = insn32;
816 NEONLdStInsn &= 0xF0FFFFFF;
817 NEONLdStInsn |= 0x04000000;
818 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
819 if (result != MCDisassembler::Fail) {
821 Check(result, AddThumbPredicate(MI));
826 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
828 uint32_t NEONDataInsn = insn32;
829 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
830 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
831 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
832 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
833 if (result != MCDisassembler::Fail) {
835 Check(result, AddThumbPredicate(MI));
841 return MCDisassembler::Fail;
845 extern "C" void LLVMInitializeARMDisassembler() {
846 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
847 createARMDisassembler);
848 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
849 createThumbDisassembler);
852 static const uint16_t GPRDecoderTable[] = {
853 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
854 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
855 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
856 ARM::R12, ARM::SP, ARM::LR, ARM::PC
859 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
860 uint64_t Address, const void *Decoder) {
862 return MCDisassembler::Fail;
864 unsigned Register = GPRDecoderTable[RegNo];
865 Inst.addOperand(MCOperand::CreateReg(Register));
866 return MCDisassembler::Success;
870 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
871 uint64_t Address, const void *Decoder) {
872 DecodeStatus S = MCDisassembler::Success;
875 S = MCDisassembler::SoftFail;
877 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
882 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
883 uint64_t Address, const void *Decoder) {
885 return MCDisassembler::Fail;
886 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
889 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
890 uint64_t Address, const void *Decoder) {
891 unsigned Register = 0;
912 return MCDisassembler::Fail;
915 Inst.addOperand(MCOperand::CreateReg(Register));
916 return MCDisassembler::Success;
919 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
920 uint64_t Address, const void *Decoder) {
921 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
922 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
925 static const uint16_t SPRDecoderTable[] = {
926 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
927 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
928 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
929 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
930 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
931 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
932 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
933 ARM::S28, ARM::S29, ARM::S30, ARM::S31
936 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
937 uint64_t Address, const void *Decoder) {
939 return MCDisassembler::Fail;
941 unsigned Register = SPRDecoderTable[RegNo];
942 Inst.addOperand(MCOperand::CreateReg(Register));
943 return MCDisassembler::Success;
946 static const uint16_t DPRDecoderTable[] = {
947 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
948 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
949 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
950 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
951 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
952 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
953 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
954 ARM::D28, ARM::D29, ARM::D30, ARM::D31
957 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
958 uint64_t Address, const void *Decoder) {
960 return MCDisassembler::Fail;
962 unsigned Register = DPRDecoderTable[RegNo];
963 Inst.addOperand(MCOperand::CreateReg(Register));
964 return MCDisassembler::Success;
967 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
968 uint64_t Address, const void *Decoder) {
970 return MCDisassembler::Fail;
971 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
975 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
976 uint64_t Address, const void *Decoder) {
978 return MCDisassembler::Fail;
979 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
982 static const uint16_t QPRDecoderTable[] = {
983 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
984 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
985 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
986 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
990 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
991 uint64_t Address, const void *Decoder) {
993 return MCDisassembler::Fail;
996 unsigned Register = QPRDecoderTable[RegNo];
997 Inst.addOperand(MCOperand::CreateReg(Register));
998 return MCDisassembler::Success;
1001 static const uint16_t DPairDecoderTable[] = {
1002 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1003 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1004 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1005 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1006 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1010 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1011 uint64_t Address, const void *Decoder) {
1013 return MCDisassembler::Fail;
1015 unsigned Register = DPairDecoderTable[RegNo];
1016 Inst.addOperand(MCOperand::CreateReg(Register));
1017 return MCDisassembler::Success;
1020 static const uint16_t DPairSpacedDecoderTable[] = {
1021 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1022 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1023 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1024 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1025 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1026 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1027 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1028 ARM::D28_D30, ARM::D29_D31
1031 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1034 const void *Decoder) {
1036 return MCDisassembler::Fail;
1038 unsigned Register = DPairSpacedDecoderTable[RegNo];
1039 Inst.addOperand(MCOperand::CreateReg(Register));
1040 return MCDisassembler::Success;
1043 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1044 uint64_t Address, const void *Decoder) {
1045 if (Val == 0xF) return MCDisassembler::Fail;
1046 // AL predicate is not allowed on Thumb1 branches.
1047 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1048 return MCDisassembler::Fail;
1049 Inst.addOperand(MCOperand::CreateImm(Val));
1050 if (Val == ARMCC::AL) {
1051 Inst.addOperand(MCOperand::CreateReg(0));
1053 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1054 return MCDisassembler::Success;
1057 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1058 uint64_t Address, const void *Decoder) {
1060 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1062 Inst.addOperand(MCOperand::CreateReg(0));
1063 return MCDisassembler::Success;
1066 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1067 uint64_t Address, const void *Decoder) {
1068 uint32_t imm = Val & 0xFF;
1069 uint32_t rot = (Val & 0xF00) >> 7;
1070 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1071 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1072 return MCDisassembler::Success;
1075 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1076 uint64_t Address, const void *Decoder) {
1077 DecodeStatus S = MCDisassembler::Success;
1079 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1080 unsigned type = fieldFromInstruction32(Val, 5, 2);
1081 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1083 // Register-immediate
1084 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1085 return MCDisassembler::Fail;
1087 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1090 Shift = ARM_AM::lsl;
1093 Shift = ARM_AM::lsr;
1096 Shift = ARM_AM::asr;
1099 Shift = ARM_AM::ror;
1103 if (Shift == ARM_AM::ror && imm == 0)
1104 Shift = ARM_AM::rrx;
1106 unsigned Op = Shift | (imm << 3);
1107 Inst.addOperand(MCOperand::CreateImm(Op));
1112 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1113 uint64_t Address, const void *Decoder) {
1114 DecodeStatus S = MCDisassembler::Success;
1116 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1117 unsigned type = fieldFromInstruction32(Val, 5, 2);
1118 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
1120 // Register-register
1121 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1122 return MCDisassembler::Fail;
1123 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1124 return MCDisassembler::Fail;
1126 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1129 Shift = ARM_AM::lsl;
1132 Shift = ARM_AM::lsr;
1135 Shift = ARM_AM::asr;
1138 Shift = ARM_AM::ror;
1142 Inst.addOperand(MCOperand::CreateImm(Shift));
1147 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1148 uint64_t Address, const void *Decoder) {
1149 DecodeStatus S = MCDisassembler::Success;
1151 bool writebackLoad = false;
1152 unsigned writebackReg = 0;
1153 switch (Inst.getOpcode()) {
1156 case ARM::LDMIA_UPD:
1157 case ARM::LDMDB_UPD:
1158 case ARM::LDMIB_UPD:
1159 case ARM::LDMDA_UPD:
1160 case ARM::t2LDMIA_UPD:
1161 case ARM::t2LDMDB_UPD:
1162 writebackLoad = true;
1163 writebackReg = Inst.getOperand(0).getReg();
1167 // Empty register lists are not allowed.
1168 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1169 for (unsigned i = 0; i < 16; ++i) {
1170 if (Val & (1 << i)) {
1171 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1172 return MCDisassembler::Fail;
1173 // Writeback not allowed if Rn is in the target list.
1174 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1175 Check(S, MCDisassembler::SoftFail);
1182 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1183 uint64_t Address, const void *Decoder) {
1184 DecodeStatus S = MCDisassembler::Success;
1186 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1187 unsigned regs = Val & 0xFF;
1189 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1190 return MCDisassembler::Fail;
1191 for (unsigned i = 0; i < (regs - 1); ++i) {
1192 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1193 return MCDisassembler::Fail;
1199 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1200 uint64_t Address, const void *Decoder) {
1201 DecodeStatus S = MCDisassembler::Success;
1203 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1204 unsigned regs = (Val & 0xFF) / 2;
1206 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1207 return MCDisassembler::Fail;
1208 for (unsigned i = 0; i < (regs - 1); ++i) {
1209 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1210 return MCDisassembler::Fail;
1216 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1217 uint64_t Address, const void *Decoder) {
1218 // This operand encodes a mask of contiguous zeros between a specified MSB
1219 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1220 // the mask of all bits LSB-and-lower, and then xor them to create
1221 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1222 // create the final mask.
1223 unsigned msb = fieldFromInstruction32(Val, 5, 5);
1224 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
1226 DecodeStatus S = MCDisassembler::Success;
1227 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1229 uint32_t msb_mask = 0xFFFFFFFF;
1230 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1231 uint32_t lsb_mask = (1U << lsb) - 1;
1233 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1237 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1238 uint64_t Address, const void *Decoder) {
1239 DecodeStatus S = MCDisassembler::Success;
1241 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1242 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
1243 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
1244 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
1245 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1246 unsigned U = fieldFromInstruction32(Insn, 23, 1);
1248 switch (Inst.getOpcode()) {
1249 case ARM::LDC_OFFSET:
1252 case ARM::LDC_OPTION:
1253 case ARM::LDCL_OFFSET:
1255 case ARM::LDCL_POST:
1256 case ARM::LDCL_OPTION:
1257 case ARM::STC_OFFSET:
1260 case ARM::STC_OPTION:
1261 case ARM::STCL_OFFSET:
1263 case ARM::STCL_POST:
1264 case ARM::STCL_OPTION:
1265 case ARM::t2LDC_OFFSET:
1266 case ARM::t2LDC_PRE:
1267 case ARM::t2LDC_POST:
1268 case ARM::t2LDC_OPTION:
1269 case ARM::t2LDCL_OFFSET:
1270 case ARM::t2LDCL_PRE:
1271 case ARM::t2LDCL_POST:
1272 case ARM::t2LDCL_OPTION:
1273 case ARM::t2STC_OFFSET:
1274 case ARM::t2STC_PRE:
1275 case ARM::t2STC_POST:
1276 case ARM::t2STC_OPTION:
1277 case ARM::t2STCL_OFFSET:
1278 case ARM::t2STCL_PRE:
1279 case ARM::t2STCL_POST:
1280 case ARM::t2STCL_OPTION:
1281 if (coproc == 0xA || coproc == 0xB)
1282 return MCDisassembler::Fail;
1288 Inst.addOperand(MCOperand::CreateImm(coproc));
1289 Inst.addOperand(MCOperand::CreateImm(CRd));
1290 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1291 return MCDisassembler::Fail;
1293 switch (Inst.getOpcode()) {
1294 case ARM::t2LDC2_OFFSET:
1295 case ARM::t2LDC2L_OFFSET:
1296 case ARM::t2LDC2_PRE:
1297 case ARM::t2LDC2L_PRE:
1298 case ARM::t2STC2_OFFSET:
1299 case ARM::t2STC2L_OFFSET:
1300 case ARM::t2STC2_PRE:
1301 case ARM::t2STC2L_PRE:
1302 case ARM::LDC2_OFFSET:
1303 case ARM::LDC2L_OFFSET:
1305 case ARM::LDC2L_PRE:
1306 case ARM::STC2_OFFSET:
1307 case ARM::STC2L_OFFSET:
1309 case ARM::STC2L_PRE:
1310 case ARM::t2LDC_OFFSET:
1311 case ARM::t2LDCL_OFFSET:
1312 case ARM::t2LDC_PRE:
1313 case ARM::t2LDCL_PRE:
1314 case ARM::t2STC_OFFSET:
1315 case ARM::t2STCL_OFFSET:
1316 case ARM::t2STC_PRE:
1317 case ARM::t2STCL_PRE:
1318 case ARM::LDC_OFFSET:
1319 case ARM::LDCL_OFFSET:
1322 case ARM::STC_OFFSET:
1323 case ARM::STCL_OFFSET:
1326 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1327 Inst.addOperand(MCOperand::CreateImm(imm));
1329 case ARM::t2LDC2_POST:
1330 case ARM::t2LDC2L_POST:
1331 case ARM::t2STC2_POST:
1332 case ARM::t2STC2L_POST:
1333 case ARM::LDC2_POST:
1334 case ARM::LDC2L_POST:
1335 case ARM::STC2_POST:
1336 case ARM::STC2L_POST:
1337 case ARM::t2LDC_POST:
1338 case ARM::t2LDCL_POST:
1339 case ARM::t2STC_POST:
1340 case ARM::t2STCL_POST:
1342 case ARM::LDCL_POST:
1344 case ARM::STCL_POST:
1348 // The 'option' variant doesn't encode 'U' in the immediate since
1349 // the immediate is unsigned [0,255].
1350 Inst.addOperand(MCOperand::CreateImm(imm));
1354 switch (Inst.getOpcode()) {
1355 case ARM::LDC_OFFSET:
1358 case ARM::LDC_OPTION:
1359 case ARM::LDCL_OFFSET:
1361 case ARM::LDCL_POST:
1362 case ARM::LDCL_OPTION:
1363 case ARM::STC_OFFSET:
1366 case ARM::STC_OPTION:
1367 case ARM::STCL_OFFSET:
1369 case ARM::STCL_POST:
1370 case ARM::STCL_OPTION:
1371 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1372 return MCDisassembler::Fail;
1382 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1383 uint64_t Address, const void *Decoder) {
1384 DecodeStatus S = MCDisassembler::Success;
1386 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1387 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1388 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1389 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1390 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1391 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1392 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1393 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1395 // On stores, the writeback operand precedes Rt.
1396 switch (Inst.getOpcode()) {
1397 case ARM::STR_POST_IMM:
1398 case ARM::STR_POST_REG:
1399 case ARM::STRB_POST_IMM:
1400 case ARM::STRB_POST_REG:
1401 case ARM::STRT_POST_REG:
1402 case ARM::STRT_POST_IMM:
1403 case ARM::STRBT_POST_REG:
1404 case ARM::STRBT_POST_IMM:
1405 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1406 return MCDisassembler::Fail;
1412 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1413 return MCDisassembler::Fail;
1415 // On loads, the writeback operand comes after Rt.
1416 switch (Inst.getOpcode()) {
1417 case ARM::LDR_POST_IMM:
1418 case ARM::LDR_POST_REG:
1419 case ARM::LDRB_POST_IMM:
1420 case ARM::LDRB_POST_REG:
1421 case ARM::LDRBT_POST_REG:
1422 case ARM::LDRBT_POST_IMM:
1423 case ARM::LDRT_POST_REG:
1424 case ARM::LDRT_POST_IMM:
1425 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1426 return MCDisassembler::Fail;
1432 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1433 return MCDisassembler::Fail;
1435 ARM_AM::AddrOpc Op = ARM_AM::add;
1436 if (!fieldFromInstruction32(Insn, 23, 1))
1439 bool writeback = (P == 0) || (W == 1);
1440 unsigned idx_mode = 0;
1442 idx_mode = ARMII::IndexModePre;
1443 else if (!P && writeback)
1444 idx_mode = ARMII::IndexModePost;
1446 if (writeback && (Rn == 15 || Rn == Rt))
1447 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1450 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1451 return MCDisassembler::Fail;
1452 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1453 switch( fieldFromInstruction32(Insn, 5, 2)) {
1467 return MCDisassembler::Fail;
1469 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1470 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1472 Inst.addOperand(MCOperand::CreateImm(imm));
1474 Inst.addOperand(MCOperand::CreateReg(0));
1475 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1476 Inst.addOperand(MCOperand::CreateImm(tmp));
1479 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1480 return MCDisassembler::Fail;
1485 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1486 uint64_t Address, const void *Decoder) {
1487 DecodeStatus S = MCDisassembler::Success;
1489 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1490 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1491 unsigned type = fieldFromInstruction32(Val, 5, 2);
1492 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1493 unsigned U = fieldFromInstruction32(Val, 12, 1);
1495 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1511 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1512 return MCDisassembler::Fail;
1513 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1514 return MCDisassembler::Fail;
1517 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1519 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1520 Inst.addOperand(MCOperand::CreateImm(shift));
1526 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1527 uint64_t Address, const void *Decoder) {
1528 DecodeStatus S = MCDisassembler::Success;
1530 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1531 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1532 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1533 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1534 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1535 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1536 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1537 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1538 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1539 unsigned Rt2 = Rt + 1;
1541 bool writeback = (W == 1) | (P == 0);
1543 // For {LD,ST}RD, Rt must be even, else undefined.
1544 switch (Inst.getOpcode()) {
1547 case ARM::STRD_POST:
1550 case ARM::LDRD_POST:
1551 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1556 switch (Inst.getOpcode()) {
1559 case ARM::STRD_POST:
1560 if (P == 0 && W == 1)
1561 S = MCDisassembler::SoftFail;
1563 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1564 S = MCDisassembler::SoftFail;
1565 if (type && Rm == 15)
1566 S = MCDisassembler::SoftFail;
1568 S = MCDisassembler::SoftFail;
1569 if (!type && fieldFromInstruction32(Insn, 8, 4))
1570 S = MCDisassembler::SoftFail;
1574 case ARM::STRH_POST:
1576 S = MCDisassembler::SoftFail;
1577 if (writeback && (Rn == 15 || Rn == Rt))
1578 S = MCDisassembler::SoftFail;
1579 if (!type && Rm == 15)
1580 S = MCDisassembler::SoftFail;
1584 case ARM::LDRD_POST:
1585 if (type && Rn == 15){
1587 S = MCDisassembler::SoftFail;
1590 if (P == 0 && W == 1)
1591 S = MCDisassembler::SoftFail;
1592 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1593 S = MCDisassembler::SoftFail;
1594 if (!type && writeback && Rn == 15)
1595 S = MCDisassembler::SoftFail;
1596 if (writeback && (Rn == Rt || Rn == Rt2))
1597 S = MCDisassembler::SoftFail;
1601 case ARM::LDRH_POST:
1602 if (type && Rn == 15){
1604 S = MCDisassembler::SoftFail;
1608 S = MCDisassembler::SoftFail;
1609 if (!type && Rm == 15)
1610 S = MCDisassembler::SoftFail;
1611 if (!type && writeback && (Rn == 15 || Rn == Rt))
1612 S = MCDisassembler::SoftFail;
1615 case ARM::LDRSH_PRE:
1616 case ARM::LDRSH_POST:
1618 case ARM::LDRSB_PRE:
1619 case ARM::LDRSB_POST:
1620 if (type && Rn == 15){
1622 S = MCDisassembler::SoftFail;
1625 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1626 S = MCDisassembler::SoftFail;
1627 if (!type && (Rt == 15 || Rm == 15))
1628 S = MCDisassembler::SoftFail;
1629 if (!type && writeback && (Rn == 15 || Rn == Rt))
1630 S = MCDisassembler::SoftFail;
1636 if (writeback) { // Writeback
1638 U |= ARMII::IndexModePre << 9;
1640 U |= ARMII::IndexModePost << 9;
1642 // On stores, the writeback operand precedes Rt.
1643 switch (Inst.getOpcode()) {
1646 case ARM::STRD_POST:
1649 case ARM::STRH_POST:
1650 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1651 return MCDisassembler::Fail;
1658 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1659 return MCDisassembler::Fail;
1660 switch (Inst.getOpcode()) {
1663 case ARM::STRD_POST:
1666 case ARM::LDRD_POST:
1667 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1668 return MCDisassembler::Fail;
1675 // On loads, the writeback operand comes after Rt.
1676 switch (Inst.getOpcode()) {
1679 case ARM::LDRD_POST:
1682 case ARM::LDRH_POST:
1684 case ARM::LDRSH_PRE:
1685 case ARM::LDRSH_POST:
1687 case ARM::LDRSB_PRE:
1688 case ARM::LDRSB_POST:
1691 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1692 return MCDisassembler::Fail;
1699 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1700 return MCDisassembler::Fail;
1703 Inst.addOperand(MCOperand::CreateReg(0));
1704 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1706 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1707 return MCDisassembler::Fail;
1708 Inst.addOperand(MCOperand::CreateImm(U));
1711 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1712 return MCDisassembler::Fail;
1717 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1718 uint64_t Address, const void *Decoder) {
1719 DecodeStatus S = MCDisassembler::Success;
1721 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1722 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1739 Inst.addOperand(MCOperand::CreateImm(mode));
1740 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1741 return MCDisassembler::Fail;
1746 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1748 uint64_t Address, const void *Decoder) {
1749 DecodeStatus S = MCDisassembler::Success;
1751 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1752 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1753 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1756 switch (Inst.getOpcode()) {
1758 Inst.setOpcode(ARM::RFEDA);
1760 case ARM::LDMDA_UPD:
1761 Inst.setOpcode(ARM::RFEDA_UPD);
1764 Inst.setOpcode(ARM::RFEDB);
1766 case ARM::LDMDB_UPD:
1767 Inst.setOpcode(ARM::RFEDB_UPD);
1770 Inst.setOpcode(ARM::RFEIA);
1772 case ARM::LDMIA_UPD:
1773 Inst.setOpcode(ARM::RFEIA_UPD);
1776 Inst.setOpcode(ARM::RFEIB);
1778 case ARM::LDMIB_UPD:
1779 Inst.setOpcode(ARM::RFEIB_UPD);
1782 Inst.setOpcode(ARM::SRSDA);
1784 case ARM::STMDA_UPD:
1785 Inst.setOpcode(ARM::SRSDA_UPD);
1788 Inst.setOpcode(ARM::SRSDB);
1790 case ARM::STMDB_UPD:
1791 Inst.setOpcode(ARM::SRSDB_UPD);
1794 Inst.setOpcode(ARM::SRSIA);
1796 case ARM::STMIA_UPD:
1797 Inst.setOpcode(ARM::SRSIA_UPD);
1800 Inst.setOpcode(ARM::SRSIB);
1802 case ARM::STMIB_UPD:
1803 Inst.setOpcode(ARM::SRSIB_UPD);
1806 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1809 // For stores (which become SRS's, the only operand is the mode.
1810 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1812 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1816 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1819 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1820 return MCDisassembler::Fail;
1821 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1822 return MCDisassembler::Fail; // Tied
1823 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1824 return MCDisassembler::Fail;
1825 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1826 return MCDisassembler::Fail;
1831 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1832 uint64_t Address, const void *Decoder) {
1833 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1834 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1835 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1836 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1838 DecodeStatus S = MCDisassembler::Success;
1840 // imod == '01' --> UNPREDICTABLE
1841 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1842 // return failure here. The '01' imod value is unprintable, so there's
1843 // nothing useful we could do even if we returned UNPREDICTABLE.
1845 if (imod == 1) return MCDisassembler::Fail;
1848 Inst.setOpcode(ARM::CPS3p);
1849 Inst.addOperand(MCOperand::CreateImm(imod));
1850 Inst.addOperand(MCOperand::CreateImm(iflags));
1851 Inst.addOperand(MCOperand::CreateImm(mode));
1852 } else if (imod && !M) {
1853 Inst.setOpcode(ARM::CPS2p);
1854 Inst.addOperand(MCOperand::CreateImm(imod));
1855 Inst.addOperand(MCOperand::CreateImm(iflags));
1856 if (mode) S = MCDisassembler::SoftFail;
1857 } else if (!imod && M) {
1858 Inst.setOpcode(ARM::CPS1p);
1859 Inst.addOperand(MCOperand::CreateImm(mode));
1860 if (iflags) S = MCDisassembler::SoftFail;
1862 // imod == '00' && M == '0' --> UNPREDICTABLE
1863 Inst.setOpcode(ARM::CPS1p);
1864 Inst.addOperand(MCOperand::CreateImm(mode));
1865 S = MCDisassembler::SoftFail;
1871 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1872 uint64_t Address, const void *Decoder) {
1873 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1874 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1875 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1876 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1878 DecodeStatus S = MCDisassembler::Success;
1880 // imod == '01' --> UNPREDICTABLE
1881 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1882 // return failure here. The '01' imod value is unprintable, so there's
1883 // nothing useful we could do even if we returned UNPREDICTABLE.
1885 if (imod == 1) return MCDisassembler::Fail;
1888 Inst.setOpcode(ARM::t2CPS3p);
1889 Inst.addOperand(MCOperand::CreateImm(imod));
1890 Inst.addOperand(MCOperand::CreateImm(iflags));
1891 Inst.addOperand(MCOperand::CreateImm(mode));
1892 } else if (imod && !M) {
1893 Inst.setOpcode(ARM::t2CPS2p);
1894 Inst.addOperand(MCOperand::CreateImm(imod));
1895 Inst.addOperand(MCOperand::CreateImm(iflags));
1896 if (mode) S = MCDisassembler::SoftFail;
1897 } else if (!imod && M) {
1898 Inst.setOpcode(ARM::t2CPS1p);
1899 Inst.addOperand(MCOperand::CreateImm(mode));
1900 if (iflags) S = MCDisassembler::SoftFail;
1902 // imod == '00' && M == '0' --> UNPREDICTABLE
1903 Inst.setOpcode(ARM::t2CPS1p);
1904 Inst.addOperand(MCOperand::CreateImm(mode));
1905 S = MCDisassembler::SoftFail;
1911 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1912 uint64_t Address, const void *Decoder) {
1913 DecodeStatus S = MCDisassembler::Success;
1915 unsigned Rd = fieldFromInstruction32(Insn, 8, 4);
1918 imm |= (fieldFromInstruction32(Insn, 0, 8) << 0);
1919 imm |= (fieldFromInstruction32(Insn, 12, 3) << 8);
1920 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1921 imm |= (fieldFromInstruction32(Insn, 26, 1) << 11);
1923 if (Inst.getOpcode() == ARM::t2MOVTi16)
1924 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1925 return MCDisassembler::Fail;
1926 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1927 return MCDisassembler::Fail;
1929 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1930 Inst.addOperand(MCOperand::CreateImm(imm));
1935 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1936 uint64_t Address, const void *Decoder) {
1937 DecodeStatus S = MCDisassembler::Success;
1939 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1940 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1943 imm |= (fieldFromInstruction32(Insn, 0, 12) << 0);
1944 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1946 if (Inst.getOpcode() == ARM::MOVTi16)
1947 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1948 return MCDisassembler::Fail;
1949 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1950 return MCDisassembler::Fail;
1952 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1953 Inst.addOperand(MCOperand::CreateImm(imm));
1955 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1956 return MCDisassembler::Fail;
1961 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
1962 uint64_t Address, const void *Decoder) {
1963 DecodeStatus S = MCDisassembler::Success;
1965 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1966 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1967 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1968 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1969 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1972 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1974 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1975 return MCDisassembler::Fail;
1976 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1977 return MCDisassembler::Fail;
1978 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1979 return MCDisassembler::Fail;
1980 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1981 return MCDisassembler::Fail;
1983 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1984 return MCDisassembler::Fail;
1989 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
1990 uint64_t Address, const void *Decoder) {
1991 DecodeStatus S = MCDisassembler::Success;
1993 unsigned add = fieldFromInstruction32(Val, 12, 1);
1994 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1995 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1997 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1998 return MCDisassembler::Fail;
2000 if (!add) imm *= -1;
2001 if (imm == 0 && !add) imm = INT32_MIN;
2002 Inst.addOperand(MCOperand::CreateImm(imm));
2004 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2009 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2010 uint64_t Address, const void *Decoder) {
2011 DecodeStatus S = MCDisassembler::Success;
2013 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2014 unsigned U = fieldFromInstruction32(Val, 8, 1);
2015 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2017 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2018 return MCDisassembler::Fail;
2021 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2023 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2028 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2029 uint64_t Address, const void *Decoder) {
2030 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2034 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2035 uint64_t Address, const void *Decoder) {
2036 DecodeStatus S = MCDisassembler::Success;
2038 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2039 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
2042 Inst.setOpcode(ARM::BLXi);
2043 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
2044 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2045 true, 4, Inst, Decoder))
2046 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2050 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2051 true, 4, Inst, Decoder))
2052 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2053 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2054 return MCDisassembler::Fail;
2060 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2061 uint64_t Address, const void *Decoder) {
2062 DecodeStatus S = MCDisassembler::Success;
2064 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
2065 unsigned align = fieldFromInstruction32(Val, 4, 2);
2067 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2068 return MCDisassembler::Fail;
2070 Inst.addOperand(MCOperand::CreateImm(0));
2072 Inst.addOperand(MCOperand::CreateImm(4 << align));
2077 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2078 uint64_t Address, const void *Decoder) {
2079 DecodeStatus S = MCDisassembler::Success;
2081 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2082 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2083 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
2084 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2085 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2086 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2088 // First output register
2089 switch (Inst.getOpcode()) {
2090 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2091 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2092 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2093 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2094 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2095 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2096 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2097 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2098 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2099 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2100 return MCDisassembler::Fail;
2105 case ARM::VLD2b16wb_fixed:
2106 case ARM::VLD2b16wb_register:
2107 case ARM::VLD2b32wb_fixed:
2108 case ARM::VLD2b32wb_register:
2109 case ARM::VLD2b8wb_fixed:
2110 case ARM::VLD2b8wb_register:
2111 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2112 return MCDisassembler::Fail;
2115 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2116 return MCDisassembler::Fail;
2119 // Second output register
2120 switch (Inst.getOpcode()) {
2124 case ARM::VLD3d8_UPD:
2125 case ARM::VLD3d16_UPD:
2126 case ARM::VLD3d32_UPD:
2130 case ARM::VLD4d8_UPD:
2131 case ARM::VLD4d16_UPD:
2132 case ARM::VLD4d32_UPD:
2133 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2134 return MCDisassembler::Fail;
2139 case ARM::VLD3q8_UPD:
2140 case ARM::VLD3q16_UPD:
2141 case ARM::VLD3q32_UPD:
2145 case ARM::VLD4q8_UPD:
2146 case ARM::VLD4q16_UPD:
2147 case ARM::VLD4q32_UPD:
2148 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2149 return MCDisassembler::Fail;
2154 // Third output register
2155 switch(Inst.getOpcode()) {
2159 case ARM::VLD3d8_UPD:
2160 case ARM::VLD3d16_UPD:
2161 case ARM::VLD3d32_UPD:
2165 case ARM::VLD4d8_UPD:
2166 case ARM::VLD4d16_UPD:
2167 case ARM::VLD4d32_UPD:
2168 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2169 return MCDisassembler::Fail;
2174 case ARM::VLD3q8_UPD:
2175 case ARM::VLD3q16_UPD:
2176 case ARM::VLD3q32_UPD:
2180 case ARM::VLD4q8_UPD:
2181 case ARM::VLD4q16_UPD:
2182 case ARM::VLD4q32_UPD:
2183 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2184 return MCDisassembler::Fail;
2190 // Fourth output register
2191 switch (Inst.getOpcode()) {
2195 case ARM::VLD4d8_UPD:
2196 case ARM::VLD4d16_UPD:
2197 case ARM::VLD4d32_UPD:
2198 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2199 return MCDisassembler::Fail;
2204 case ARM::VLD4q8_UPD:
2205 case ARM::VLD4q16_UPD:
2206 case ARM::VLD4q32_UPD:
2207 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2208 return MCDisassembler::Fail;
2214 // Writeback operand
2215 switch (Inst.getOpcode()) {
2216 case ARM::VLD1d8wb_fixed:
2217 case ARM::VLD1d16wb_fixed:
2218 case ARM::VLD1d32wb_fixed:
2219 case ARM::VLD1d64wb_fixed:
2220 case ARM::VLD1d8wb_register:
2221 case ARM::VLD1d16wb_register:
2222 case ARM::VLD1d32wb_register:
2223 case ARM::VLD1d64wb_register:
2224 case ARM::VLD1q8wb_fixed:
2225 case ARM::VLD1q16wb_fixed:
2226 case ARM::VLD1q32wb_fixed:
2227 case ARM::VLD1q64wb_fixed:
2228 case ARM::VLD1q8wb_register:
2229 case ARM::VLD1q16wb_register:
2230 case ARM::VLD1q32wb_register:
2231 case ARM::VLD1q64wb_register:
2232 case ARM::VLD1d8Twb_fixed:
2233 case ARM::VLD1d8Twb_register:
2234 case ARM::VLD1d16Twb_fixed:
2235 case ARM::VLD1d16Twb_register:
2236 case ARM::VLD1d32Twb_fixed:
2237 case ARM::VLD1d32Twb_register:
2238 case ARM::VLD1d64Twb_fixed:
2239 case ARM::VLD1d64Twb_register:
2240 case ARM::VLD1d8Qwb_fixed:
2241 case ARM::VLD1d8Qwb_register:
2242 case ARM::VLD1d16Qwb_fixed:
2243 case ARM::VLD1d16Qwb_register:
2244 case ARM::VLD1d32Qwb_fixed:
2245 case ARM::VLD1d32Qwb_register:
2246 case ARM::VLD1d64Qwb_fixed:
2247 case ARM::VLD1d64Qwb_register:
2248 case ARM::VLD2d8wb_fixed:
2249 case ARM::VLD2d16wb_fixed:
2250 case ARM::VLD2d32wb_fixed:
2251 case ARM::VLD2q8wb_fixed:
2252 case ARM::VLD2q16wb_fixed:
2253 case ARM::VLD2q32wb_fixed:
2254 case ARM::VLD2d8wb_register:
2255 case ARM::VLD2d16wb_register:
2256 case ARM::VLD2d32wb_register:
2257 case ARM::VLD2q8wb_register:
2258 case ARM::VLD2q16wb_register:
2259 case ARM::VLD2q32wb_register:
2260 case ARM::VLD2b8wb_fixed:
2261 case ARM::VLD2b16wb_fixed:
2262 case ARM::VLD2b32wb_fixed:
2263 case ARM::VLD2b8wb_register:
2264 case ARM::VLD2b16wb_register:
2265 case ARM::VLD2b32wb_register:
2266 case ARM::VLD3d8_UPD:
2267 case ARM::VLD3d16_UPD:
2268 case ARM::VLD3d32_UPD:
2269 case ARM::VLD3q8_UPD:
2270 case ARM::VLD3q16_UPD:
2271 case ARM::VLD3q32_UPD:
2272 case ARM::VLD4d8_UPD:
2273 case ARM::VLD4d16_UPD:
2274 case ARM::VLD4d32_UPD:
2275 case ARM::VLD4q8_UPD:
2276 case ARM::VLD4q16_UPD:
2277 case ARM::VLD4q32_UPD:
2278 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2279 return MCDisassembler::Fail;
2285 // AddrMode6 Base (register+alignment)
2286 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2287 return MCDisassembler::Fail;
2289 // AddrMode6 Offset (register)
2290 switch (Inst.getOpcode()) {
2292 // The below have been updated to have explicit am6offset split
2293 // between fixed and register offset. For those instructions not
2294 // yet updated, we need to add an additional reg0 operand for the
2297 // The fixed offset encodes as Rm == 0xd, so we check for that.
2299 Inst.addOperand(MCOperand::CreateReg(0));
2302 // Fall through to handle the register offset variant.
2303 case ARM::VLD1d8wb_fixed:
2304 case ARM::VLD1d16wb_fixed:
2305 case ARM::VLD1d32wb_fixed:
2306 case ARM::VLD1d64wb_fixed:
2307 case ARM::VLD1d8Twb_fixed:
2308 case ARM::VLD1d16Twb_fixed:
2309 case ARM::VLD1d32Twb_fixed:
2310 case ARM::VLD1d64Twb_fixed:
2311 case ARM::VLD1d8Qwb_fixed:
2312 case ARM::VLD1d16Qwb_fixed:
2313 case ARM::VLD1d32Qwb_fixed:
2314 case ARM::VLD1d64Qwb_fixed:
2315 case ARM::VLD1d8wb_register:
2316 case ARM::VLD1d16wb_register:
2317 case ARM::VLD1d32wb_register:
2318 case ARM::VLD1d64wb_register:
2319 case ARM::VLD1q8wb_fixed:
2320 case ARM::VLD1q16wb_fixed:
2321 case ARM::VLD1q32wb_fixed:
2322 case ARM::VLD1q64wb_fixed:
2323 case ARM::VLD1q8wb_register:
2324 case ARM::VLD1q16wb_register:
2325 case ARM::VLD1q32wb_register:
2326 case ARM::VLD1q64wb_register:
2327 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2328 // variant encodes Rm == 0xf. Anything else is a register offset post-
2329 // increment and we need to add the register operand to the instruction.
2330 if (Rm != 0xD && Rm != 0xF &&
2331 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2332 return MCDisassembler::Fail;
2339 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2340 uint64_t Address, const void *Decoder) {
2341 DecodeStatus S = MCDisassembler::Success;
2343 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2344 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2345 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
2346 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2347 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2348 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2350 // Writeback Operand
2351 switch (Inst.getOpcode()) {
2352 case ARM::VST1d8wb_fixed:
2353 case ARM::VST1d16wb_fixed:
2354 case ARM::VST1d32wb_fixed:
2355 case ARM::VST1d64wb_fixed:
2356 case ARM::VST1d8wb_register:
2357 case ARM::VST1d16wb_register:
2358 case ARM::VST1d32wb_register:
2359 case ARM::VST1d64wb_register:
2360 case ARM::VST1q8wb_fixed:
2361 case ARM::VST1q16wb_fixed:
2362 case ARM::VST1q32wb_fixed:
2363 case ARM::VST1q64wb_fixed:
2364 case ARM::VST1q8wb_register:
2365 case ARM::VST1q16wb_register:
2366 case ARM::VST1q32wb_register:
2367 case ARM::VST1q64wb_register:
2368 case ARM::VST1d8Twb_fixed:
2369 case ARM::VST1d16Twb_fixed:
2370 case ARM::VST1d32Twb_fixed:
2371 case ARM::VST1d64Twb_fixed:
2372 case ARM::VST1d8Twb_register:
2373 case ARM::VST1d16Twb_register:
2374 case ARM::VST1d32Twb_register:
2375 case ARM::VST1d64Twb_register:
2376 case ARM::VST1d8Qwb_fixed:
2377 case ARM::VST1d16Qwb_fixed:
2378 case ARM::VST1d32Qwb_fixed:
2379 case ARM::VST1d64Qwb_fixed:
2380 case ARM::VST1d8Qwb_register:
2381 case ARM::VST1d16Qwb_register:
2382 case ARM::VST1d32Qwb_register:
2383 case ARM::VST1d64Qwb_register:
2384 case ARM::VST2d8wb_fixed:
2385 case ARM::VST2d16wb_fixed:
2386 case ARM::VST2d32wb_fixed:
2387 case ARM::VST2d8wb_register:
2388 case ARM::VST2d16wb_register:
2389 case ARM::VST2d32wb_register:
2390 case ARM::VST2q8wb_fixed:
2391 case ARM::VST2q16wb_fixed:
2392 case ARM::VST2q32wb_fixed:
2393 case ARM::VST2q8wb_register:
2394 case ARM::VST2q16wb_register:
2395 case ARM::VST2q32wb_register:
2396 case ARM::VST2b8wb_fixed:
2397 case ARM::VST2b16wb_fixed:
2398 case ARM::VST2b32wb_fixed:
2399 case ARM::VST2b8wb_register:
2400 case ARM::VST2b16wb_register:
2401 case ARM::VST2b32wb_register:
2402 Inst.addOperand(MCOperand::CreateImm(0));
2404 case ARM::VST3d8_UPD:
2405 case ARM::VST3d16_UPD:
2406 case ARM::VST3d32_UPD:
2407 case ARM::VST3q8_UPD:
2408 case ARM::VST3q16_UPD:
2409 case ARM::VST3q32_UPD:
2410 case ARM::VST4d8_UPD:
2411 case ARM::VST4d16_UPD:
2412 case ARM::VST4d32_UPD:
2413 case ARM::VST4q8_UPD:
2414 case ARM::VST4q16_UPD:
2415 case ARM::VST4q32_UPD:
2416 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2417 return MCDisassembler::Fail;
2423 // AddrMode6 Base (register+alignment)
2424 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2425 return MCDisassembler::Fail;
2427 // AddrMode6 Offset (register)
2428 switch (Inst.getOpcode()) {
2431 Inst.addOperand(MCOperand::CreateReg(0));
2432 else if (Rm != 0xF) {
2433 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2434 return MCDisassembler::Fail;
2437 case ARM::VST1d8wb_fixed:
2438 case ARM::VST1d16wb_fixed:
2439 case ARM::VST1d32wb_fixed:
2440 case ARM::VST1d64wb_fixed:
2441 case ARM::VST1q8wb_fixed:
2442 case ARM::VST1q16wb_fixed:
2443 case ARM::VST1q32wb_fixed:
2444 case ARM::VST1q64wb_fixed:
2445 case ARM::VST1d8Twb_fixed:
2446 case ARM::VST1d16Twb_fixed:
2447 case ARM::VST1d32Twb_fixed:
2448 case ARM::VST1d64Twb_fixed:
2449 case ARM::VST1d8Qwb_fixed:
2450 case ARM::VST1d16Qwb_fixed:
2451 case ARM::VST1d32Qwb_fixed:
2452 case ARM::VST1d64Qwb_fixed:
2453 case ARM::VST2d8wb_fixed:
2454 case ARM::VST2d16wb_fixed:
2455 case ARM::VST2d32wb_fixed:
2456 case ARM::VST2q8wb_fixed:
2457 case ARM::VST2q16wb_fixed:
2458 case ARM::VST2q32wb_fixed:
2459 case ARM::VST2b8wb_fixed:
2460 case ARM::VST2b16wb_fixed:
2461 case ARM::VST2b32wb_fixed:
2466 // First input register
2467 switch (Inst.getOpcode()) {
2472 case ARM::VST1q16wb_fixed:
2473 case ARM::VST1q16wb_register:
2474 case ARM::VST1q32wb_fixed:
2475 case ARM::VST1q32wb_register:
2476 case ARM::VST1q64wb_fixed:
2477 case ARM::VST1q64wb_register:
2478 case ARM::VST1q8wb_fixed:
2479 case ARM::VST1q8wb_register:
2483 case ARM::VST2d16wb_fixed:
2484 case ARM::VST2d16wb_register:
2485 case ARM::VST2d32wb_fixed:
2486 case ARM::VST2d32wb_register:
2487 case ARM::VST2d8wb_fixed:
2488 case ARM::VST2d8wb_register:
2489 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2490 return MCDisassembler::Fail;
2495 case ARM::VST2b16wb_fixed:
2496 case ARM::VST2b16wb_register:
2497 case ARM::VST2b32wb_fixed:
2498 case ARM::VST2b32wb_register:
2499 case ARM::VST2b8wb_fixed:
2500 case ARM::VST2b8wb_register:
2501 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2502 return MCDisassembler::Fail;
2505 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2506 return MCDisassembler::Fail;
2509 // Second input register
2510 switch (Inst.getOpcode()) {
2514 case ARM::VST3d8_UPD:
2515 case ARM::VST3d16_UPD:
2516 case ARM::VST3d32_UPD:
2520 case ARM::VST4d8_UPD:
2521 case ARM::VST4d16_UPD:
2522 case ARM::VST4d32_UPD:
2523 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2524 return MCDisassembler::Fail;
2529 case ARM::VST3q8_UPD:
2530 case ARM::VST3q16_UPD:
2531 case ARM::VST3q32_UPD:
2535 case ARM::VST4q8_UPD:
2536 case ARM::VST4q16_UPD:
2537 case ARM::VST4q32_UPD:
2538 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2539 return MCDisassembler::Fail;
2545 // Third input register
2546 switch (Inst.getOpcode()) {
2550 case ARM::VST3d8_UPD:
2551 case ARM::VST3d16_UPD:
2552 case ARM::VST3d32_UPD:
2556 case ARM::VST4d8_UPD:
2557 case ARM::VST4d16_UPD:
2558 case ARM::VST4d32_UPD:
2559 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2560 return MCDisassembler::Fail;
2565 case ARM::VST3q8_UPD:
2566 case ARM::VST3q16_UPD:
2567 case ARM::VST3q32_UPD:
2571 case ARM::VST4q8_UPD:
2572 case ARM::VST4q16_UPD:
2573 case ARM::VST4q32_UPD:
2574 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2575 return MCDisassembler::Fail;
2581 // Fourth input register
2582 switch (Inst.getOpcode()) {
2586 case ARM::VST4d8_UPD:
2587 case ARM::VST4d16_UPD:
2588 case ARM::VST4d32_UPD:
2589 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2590 return MCDisassembler::Fail;
2595 case ARM::VST4q8_UPD:
2596 case ARM::VST4q16_UPD:
2597 case ARM::VST4q32_UPD:
2598 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2599 return MCDisassembler::Fail;
2608 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2609 uint64_t Address, const void *Decoder) {
2610 DecodeStatus S = MCDisassembler::Success;
2612 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2613 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2614 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2615 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2616 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2617 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2619 align *= (1 << size);
2621 switch (Inst.getOpcode()) {
2622 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2623 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2624 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2625 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2626 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2627 return MCDisassembler::Fail;
2630 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2631 return MCDisassembler::Fail;
2635 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2636 return MCDisassembler::Fail;
2639 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2640 return MCDisassembler::Fail;
2641 Inst.addOperand(MCOperand::CreateImm(align));
2643 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2644 // variant encodes Rm == 0xf. Anything else is a register offset post-
2645 // increment and we need to add the register operand to the instruction.
2646 if (Rm != 0xD && Rm != 0xF &&
2647 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2648 return MCDisassembler::Fail;
2653 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2654 uint64_t Address, const void *Decoder) {
2655 DecodeStatus S = MCDisassembler::Success;
2657 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2658 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2659 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2660 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2661 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2662 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2663 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2666 switch (Inst.getOpcode()) {
2667 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2668 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2669 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2670 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2671 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2672 return MCDisassembler::Fail;
2674 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2675 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2676 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2677 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2678 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2679 return MCDisassembler::Fail;
2682 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2683 return MCDisassembler::Fail;
2688 Inst.addOperand(MCOperand::CreateImm(0));
2690 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2691 return MCDisassembler::Fail;
2692 Inst.addOperand(MCOperand::CreateImm(align));
2695 Inst.addOperand(MCOperand::CreateReg(0));
2696 else if (Rm != 0xF) {
2697 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2698 return MCDisassembler::Fail;
2701 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2702 return MCDisassembler::Fail;
2707 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2708 uint64_t Address, const void *Decoder) {
2709 DecodeStatus S = MCDisassembler::Success;
2711 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2712 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2713 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2714 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2715 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2717 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2718 return MCDisassembler::Fail;
2719 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2720 return MCDisassembler::Fail;
2721 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2722 return MCDisassembler::Fail;
2724 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2725 return MCDisassembler::Fail;
2728 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2729 return MCDisassembler::Fail;
2730 Inst.addOperand(MCOperand::CreateImm(0));
2733 Inst.addOperand(MCOperand::CreateReg(0));
2734 else if (Rm != 0xF) {
2735 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2736 return MCDisassembler::Fail;
2742 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2743 uint64_t Address, const void *Decoder) {
2744 DecodeStatus S = MCDisassembler::Success;
2746 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2747 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2748 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2749 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2750 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2751 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2752 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2767 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2768 return MCDisassembler::Fail;
2769 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2770 return MCDisassembler::Fail;
2771 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2772 return MCDisassembler::Fail;
2773 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2774 return MCDisassembler::Fail;
2776 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2777 return MCDisassembler::Fail;
2780 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2781 return MCDisassembler::Fail;
2782 Inst.addOperand(MCOperand::CreateImm(align));
2785 Inst.addOperand(MCOperand::CreateReg(0));
2786 else if (Rm != 0xF) {
2787 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2788 return MCDisassembler::Fail;
2795 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2796 uint64_t Address, const void *Decoder) {
2797 DecodeStatus S = MCDisassembler::Success;
2799 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2800 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2801 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2802 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2803 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2804 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2805 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2806 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2809 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2810 return MCDisassembler::Fail;
2812 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2813 return MCDisassembler::Fail;
2816 Inst.addOperand(MCOperand::CreateImm(imm));
2818 switch (Inst.getOpcode()) {
2819 case ARM::VORRiv4i16:
2820 case ARM::VORRiv2i32:
2821 case ARM::VBICiv4i16:
2822 case ARM::VBICiv2i32:
2823 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2824 return MCDisassembler::Fail;
2826 case ARM::VORRiv8i16:
2827 case ARM::VORRiv4i32:
2828 case ARM::VBICiv8i16:
2829 case ARM::VBICiv4i32:
2830 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2831 return MCDisassembler::Fail;
2840 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2841 uint64_t Address, const void *Decoder) {
2842 DecodeStatus S = MCDisassembler::Success;
2844 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2845 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2846 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2847 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2848 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2850 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2851 return MCDisassembler::Fail;
2852 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2853 return MCDisassembler::Fail;
2854 Inst.addOperand(MCOperand::CreateImm(8 << size));
2859 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2860 uint64_t Address, const void *Decoder) {
2861 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2862 return MCDisassembler::Success;
2865 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2866 uint64_t Address, const void *Decoder) {
2867 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2868 return MCDisassembler::Success;
2871 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2872 uint64_t Address, const void *Decoder) {
2873 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2874 return MCDisassembler::Success;
2877 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2878 uint64_t Address, const void *Decoder) {
2879 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2880 return MCDisassembler::Success;
2883 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2884 uint64_t Address, const void *Decoder) {
2885 DecodeStatus S = MCDisassembler::Success;
2887 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2888 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2889 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2890 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2891 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2892 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2893 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2895 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2896 return MCDisassembler::Fail;
2898 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2899 return MCDisassembler::Fail; // Writeback
2902 switch (Inst.getOpcode()) {
2905 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
2906 return MCDisassembler::Fail;
2909 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
2910 return MCDisassembler::Fail;
2913 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2914 return MCDisassembler::Fail;
2919 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
2920 uint64_t Address, const void *Decoder) {
2921 DecodeStatus S = MCDisassembler::Success;
2923 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2924 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2926 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2927 return MCDisassembler::Fail;
2929 switch(Inst.getOpcode()) {
2931 return MCDisassembler::Fail;
2933 break; // tADR does not explicitly represent the PC as an operand.
2935 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2939 Inst.addOperand(MCOperand::CreateImm(imm));
2943 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
2944 uint64_t Address, const void *Decoder) {
2945 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2946 return MCDisassembler::Success;
2949 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
2950 uint64_t Address, const void *Decoder) {
2951 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2952 return MCDisassembler::Success;
2955 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
2956 uint64_t Address, const void *Decoder) {
2957 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2958 return MCDisassembler::Success;
2961 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
2962 uint64_t Address, const void *Decoder) {
2963 DecodeStatus S = MCDisassembler::Success;
2965 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2966 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2968 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2969 return MCDisassembler::Fail;
2970 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2971 return MCDisassembler::Fail;
2976 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
2977 uint64_t Address, const void *Decoder) {
2978 DecodeStatus S = MCDisassembler::Success;
2980 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2981 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2983 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2984 return MCDisassembler::Fail;
2985 Inst.addOperand(MCOperand::CreateImm(imm));
2990 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
2991 uint64_t Address, const void *Decoder) {
2992 unsigned imm = Val << 2;
2994 Inst.addOperand(MCOperand::CreateImm(imm));
2995 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
2997 return MCDisassembler::Success;
3000 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3001 uint64_t Address, const void *Decoder) {
3002 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3003 Inst.addOperand(MCOperand::CreateImm(Val));
3005 return MCDisassembler::Success;
3008 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3009 uint64_t Address, const void *Decoder) {
3010 DecodeStatus S = MCDisassembler::Success;
3012 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
3013 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
3014 unsigned imm = fieldFromInstruction32(Val, 0, 2);
3016 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3017 return MCDisassembler::Fail;
3018 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3019 return MCDisassembler::Fail;
3020 Inst.addOperand(MCOperand::CreateImm(imm));
3025 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3026 uint64_t Address, const void *Decoder) {
3027 DecodeStatus S = MCDisassembler::Success;
3029 switch (Inst.getOpcode()) {
3035 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3036 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3037 return MCDisassembler::Fail;
3041 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3043 switch (Inst.getOpcode()) {
3045 Inst.setOpcode(ARM::t2LDRBpci);
3048 Inst.setOpcode(ARM::t2LDRHpci);
3051 Inst.setOpcode(ARM::t2LDRSHpci);
3054 Inst.setOpcode(ARM::t2LDRSBpci);
3057 Inst.setOpcode(ARM::t2PLDi12);
3058 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3061 return MCDisassembler::Fail;
3064 int imm = fieldFromInstruction32(Insn, 0, 12);
3065 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
3066 Inst.addOperand(MCOperand::CreateImm(imm));
3071 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
3072 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
3073 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
3074 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3075 return MCDisassembler::Fail;
3080 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3081 uint64_t Address, const void *Decoder) {
3082 int imm = Val & 0xFF;
3083 if (!(Val & 0x100)) imm *= -1;
3084 Inst.addOperand(MCOperand::CreateImm(imm << 2));
3086 return MCDisassembler::Success;
3089 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3090 uint64_t Address, const void *Decoder) {
3091 DecodeStatus S = MCDisassembler::Success;
3093 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
3094 unsigned imm = fieldFromInstruction32(Val, 0, 9);
3096 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3097 return MCDisassembler::Fail;
3098 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3099 return MCDisassembler::Fail;
3104 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3105 uint64_t Address, const void *Decoder) {
3106 DecodeStatus S = MCDisassembler::Success;
3108 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
3109 unsigned imm = fieldFromInstruction32(Val, 0, 8);
3111 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3112 return MCDisassembler::Fail;
3114 Inst.addOperand(MCOperand::CreateImm(imm));
3119 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3120 uint64_t Address, const void *Decoder) {
3121 int imm = Val & 0xFF;
3124 else if (!(Val & 0x100))
3126 Inst.addOperand(MCOperand::CreateImm(imm));
3128 return MCDisassembler::Success;
3132 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3133 uint64_t Address, const void *Decoder) {
3134 DecodeStatus S = MCDisassembler::Success;
3136 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
3137 unsigned imm = fieldFromInstruction32(Val, 0, 9);
3139 // Some instructions always use an additive offset.
3140 switch (Inst.getOpcode()) {
3155 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3156 return MCDisassembler::Fail;
3157 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3158 return MCDisassembler::Fail;
3163 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3164 uint64_t Address, const void *Decoder) {
3165 DecodeStatus S = MCDisassembler::Success;
3167 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3168 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3169 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3170 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
3172 unsigned load = fieldFromInstruction32(Insn, 20, 1);
3175 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3176 return MCDisassembler::Fail;
3179 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3180 return MCDisassembler::Fail;
3183 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3184 return MCDisassembler::Fail;
3187 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3188 return MCDisassembler::Fail;
3193 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3194 uint64_t Address, const void *Decoder) {
3195 DecodeStatus S = MCDisassembler::Success;
3197 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
3198 unsigned imm = fieldFromInstruction32(Val, 0, 12);
3200 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3201 return MCDisassembler::Fail;
3202 Inst.addOperand(MCOperand::CreateImm(imm));
3208 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3209 uint64_t Address, const void *Decoder) {
3210 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
3212 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3213 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3214 Inst.addOperand(MCOperand::CreateImm(imm));
3216 return MCDisassembler::Success;
3219 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3220 uint64_t Address, const void *Decoder) {
3221 DecodeStatus S = MCDisassembler::Success;
3223 if (Inst.getOpcode() == ARM::tADDrSP) {
3224 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
3225 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
3227 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3228 return MCDisassembler::Fail;
3229 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3230 return MCDisassembler::Fail;
3231 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3232 } else if (Inst.getOpcode() == ARM::tADDspr) {
3233 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
3235 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3236 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3237 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3238 return MCDisassembler::Fail;
3244 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3245 uint64_t Address, const void *Decoder) {
3246 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
3247 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
3249 Inst.addOperand(MCOperand::CreateImm(imod));
3250 Inst.addOperand(MCOperand::CreateImm(flags));
3252 return MCDisassembler::Success;
3255 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3256 uint64_t Address, const void *Decoder) {
3257 DecodeStatus S = MCDisassembler::Success;
3258 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3259 unsigned add = fieldFromInstruction32(Insn, 4, 1);
3261 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3262 return MCDisassembler::Fail;
3263 Inst.addOperand(MCOperand::CreateImm(add));
3268 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3269 uint64_t Address, const void *Decoder) {
3270 if (!tryAddingSymbolicOperand(Address,
3271 (Address & ~2u) + SignExtend32<22>(Val << 1) + 4,
3272 true, 4, Inst, Decoder))
3273 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3274 return MCDisassembler::Success;
3277 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3278 uint64_t Address, const void *Decoder) {
3279 if (Val == 0xA || Val == 0xB)
3280 return MCDisassembler::Fail;
3282 Inst.addOperand(MCOperand::CreateImm(Val));
3283 return MCDisassembler::Success;
3287 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3288 uint64_t Address, const void *Decoder) {
3289 DecodeStatus S = MCDisassembler::Success;
3291 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3292 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3294 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3295 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3296 return MCDisassembler::Fail;
3297 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3298 return MCDisassembler::Fail;
3303 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3304 uint64_t Address, const void *Decoder) {
3305 DecodeStatus S = MCDisassembler::Success;
3307 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
3308 if (pred == 0xE || pred == 0xF) {
3309 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
3312 return MCDisassembler::Fail;
3314 Inst.setOpcode(ARM::t2DSB);
3317 Inst.setOpcode(ARM::t2DMB);
3320 Inst.setOpcode(ARM::t2ISB);
3324 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
3325 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3328 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
3329 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
3330 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
3331 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
3332 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
3334 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3335 return MCDisassembler::Fail;
3336 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3337 return MCDisassembler::Fail;
3342 // Decode a shifted immediate operand. These basically consist
3343 // of an 8-bit value, and a 4-bit directive that specifies either
3344 // a splat operation or a rotation.
3345 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3346 uint64_t Address, const void *Decoder) {
3347 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
3349 unsigned byte = fieldFromInstruction32(Val, 8, 2);
3350 unsigned imm = fieldFromInstruction32(Val, 0, 8);
3353 Inst.addOperand(MCOperand::CreateImm(imm));
3356 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3359 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3362 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3367 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
3368 unsigned rot = fieldFromInstruction32(Val, 7, 5);
3369 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3370 Inst.addOperand(MCOperand::CreateImm(imm));
3373 return MCDisassembler::Success;
3377 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3378 uint64_t Address, const void *Decoder){
3379 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3380 return MCDisassembler::Success;
3383 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3384 uint64_t Address, const void *Decoder){
3385 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<22>(Val<<1) + 4,
3386 true, 4, Inst, Decoder))
3387 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3388 return MCDisassembler::Success;
3391 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3392 uint64_t Address, const void *Decoder) {
3395 return MCDisassembler::Fail;
3407 Inst.addOperand(MCOperand::CreateImm(Val));
3408 return MCDisassembler::Success;
3411 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3412 uint64_t Address, const void *Decoder) {
3413 if (!Val) return MCDisassembler::Fail;
3414 Inst.addOperand(MCOperand::CreateImm(Val));
3415 return MCDisassembler::Success;
3418 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3419 uint64_t Address, const void *Decoder) {
3420 DecodeStatus S = MCDisassembler::Success;
3422 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3423 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3424 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3426 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3428 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3429 return MCDisassembler::Fail;
3430 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3431 return MCDisassembler::Fail;
3432 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3433 return MCDisassembler::Fail;
3434 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3435 return MCDisassembler::Fail;
3441 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3442 uint64_t Address, const void *Decoder){
3443 DecodeStatus S = MCDisassembler::Success;
3445 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3446 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3447 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3448 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3450 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3451 return MCDisassembler::Fail;
3453 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3454 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3456 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3457 return MCDisassembler::Fail;
3458 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3459 return MCDisassembler::Fail;
3460 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3461 return MCDisassembler::Fail;
3462 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3463 return MCDisassembler::Fail;
3468 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3469 uint64_t Address, const void *Decoder) {
3470 DecodeStatus S = MCDisassembler::Success;
3472 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3473 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3474 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3475 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3476 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3477 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3479 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3481 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3482 return MCDisassembler::Fail;
3483 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3484 return MCDisassembler::Fail;
3485 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3486 return MCDisassembler::Fail;
3487 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3488 return MCDisassembler::Fail;
3493 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3494 uint64_t Address, const void *Decoder) {
3495 DecodeStatus S = MCDisassembler::Success;
3497 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3498 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3499 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3500 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3501 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3502 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3503 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3505 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3506 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3508 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3509 return MCDisassembler::Fail;
3510 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3511 return MCDisassembler::Fail;
3512 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3513 return MCDisassembler::Fail;
3514 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3515 return MCDisassembler::Fail;
3521 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3522 uint64_t Address, const void *Decoder) {
3523 DecodeStatus S = MCDisassembler::Success;
3525 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3526 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3527 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3528 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3529 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3530 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3532 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3534 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3535 return MCDisassembler::Fail;
3536 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3537 return MCDisassembler::Fail;
3538 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3539 return MCDisassembler::Fail;
3540 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3541 return MCDisassembler::Fail;
3546 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3547 uint64_t Address, const void *Decoder) {
3548 DecodeStatus S = MCDisassembler::Success;
3550 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3551 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3552 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3553 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3554 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3555 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3557 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3559 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3560 return MCDisassembler::Fail;
3561 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3562 return MCDisassembler::Fail;
3563 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3564 return MCDisassembler::Fail;
3565 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3566 return MCDisassembler::Fail;
3571 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3572 uint64_t Address, const void *Decoder) {
3573 DecodeStatus S = MCDisassembler::Success;
3575 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3576 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3577 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3578 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3579 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3585 return MCDisassembler::Fail;
3587 if (fieldFromInstruction32(Insn, 4, 1))
3588 return MCDisassembler::Fail; // UNDEFINED
3589 index = fieldFromInstruction32(Insn, 5, 3);
3592 if (fieldFromInstruction32(Insn, 5, 1))
3593 return MCDisassembler::Fail; // UNDEFINED
3594 index = fieldFromInstruction32(Insn, 6, 2);
3595 if (fieldFromInstruction32(Insn, 4, 1))
3599 if (fieldFromInstruction32(Insn, 6, 1))
3600 return MCDisassembler::Fail; // UNDEFINED
3601 index = fieldFromInstruction32(Insn, 7, 1);
3602 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3606 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3607 return MCDisassembler::Fail;
3608 if (Rm != 0xF) { // Writeback
3609 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3610 return MCDisassembler::Fail;
3612 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3613 return MCDisassembler::Fail;
3614 Inst.addOperand(MCOperand::CreateImm(align));
3617 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3618 return MCDisassembler::Fail;
3620 Inst.addOperand(MCOperand::CreateReg(0));
3623 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3624 return MCDisassembler::Fail;
3625 Inst.addOperand(MCOperand::CreateImm(index));
3630 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3631 uint64_t Address, const void *Decoder) {
3632 DecodeStatus S = MCDisassembler::Success;
3634 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3635 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3636 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3637 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3638 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3644 return MCDisassembler::Fail;
3646 if (fieldFromInstruction32(Insn, 4, 1))
3647 return MCDisassembler::Fail; // UNDEFINED
3648 index = fieldFromInstruction32(Insn, 5, 3);
3651 if (fieldFromInstruction32(Insn, 5, 1))
3652 return MCDisassembler::Fail; // UNDEFINED
3653 index = fieldFromInstruction32(Insn, 6, 2);
3654 if (fieldFromInstruction32(Insn, 4, 1))
3658 if (fieldFromInstruction32(Insn, 6, 1))
3659 return MCDisassembler::Fail; // UNDEFINED
3660 index = fieldFromInstruction32(Insn, 7, 1);
3661 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3665 if (Rm != 0xF) { // Writeback
3666 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3667 return MCDisassembler::Fail;
3669 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3670 return MCDisassembler::Fail;
3671 Inst.addOperand(MCOperand::CreateImm(align));
3674 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3675 return MCDisassembler::Fail;
3677 Inst.addOperand(MCOperand::CreateReg(0));
3680 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3681 return MCDisassembler::Fail;
3682 Inst.addOperand(MCOperand::CreateImm(index));
3688 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3689 uint64_t Address, const void *Decoder) {
3690 DecodeStatus S = MCDisassembler::Success;
3692 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3693 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3694 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3695 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3696 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3703 return MCDisassembler::Fail;
3705 index = fieldFromInstruction32(Insn, 5, 3);
3706 if (fieldFromInstruction32(Insn, 4, 1))
3710 index = fieldFromInstruction32(Insn, 6, 2);
3711 if (fieldFromInstruction32(Insn, 4, 1))
3713 if (fieldFromInstruction32(Insn, 5, 1))
3717 if (fieldFromInstruction32(Insn, 5, 1))
3718 return MCDisassembler::Fail; // UNDEFINED
3719 index = fieldFromInstruction32(Insn, 7, 1);
3720 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3722 if (fieldFromInstruction32(Insn, 6, 1))
3727 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3728 return MCDisassembler::Fail;
3729 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3730 return MCDisassembler::Fail;
3731 if (Rm != 0xF) { // Writeback
3732 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3733 return MCDisassembler::Fail;
3735 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3736 return MCDisassembler::Fail;
3737 Inst.addOperand(MCOperand::CreateImm(align));
3740 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3741 return MCDisassembler::Fail;
3743 Inst.addOperand(MCOperand::CreateReg(0));
3746 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3747 return MCDisassembler::Fail;
3748 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3749 return MCDisassembler::Fail;
3750 Inst.addOperand(MCOperand::CreateImm(index));
3755 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3756 uint64_t Address, const void *Decoder) {
3757 DecodeStatus S = MCDisassembler::Success;
3759 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3760 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3761 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3762 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3763 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3770 return MCDisassembler::Fail;
3772 index = fieldFromInstruction32(Insn, 5, 3);
3773 if (fieldFromInstruction32(Insn, 4, 1))
3777 index = fieldFromInstruction32(Insn, 6, 2);
3778 if (fieldFromInstruction32(Insn, 4, 1))
3780 if (fieldFromInstruction32(Insn, 5, 1))
3784 if (fieldFromInstruction32(Insn, 5, 1))
3785 return MCDisassembler::Fail; // UNDEFINED
3786 index = fieldFromInstruction32(Insn, 7, 1);
3787 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3789 if (fieldFromInstruction32(Insn, 6, 1))
3794 if (Rm != 0xF) { // Writeback
3795 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3796 return MCDisassembler::Fail;
3798 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3799 return MCDisassembler::Fail;
3800 Inst.addOperand(MCOperand::CreateImm(align));
3803 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3804 return MCDisassembler::Fail;
3806 Inst.addOperand(MCOperand::CreateReg(0));
3809 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3810 return MCDisassembler::Fail;
3811 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3812 return MCDisassembler::Fail;
3813 Inst.addOperand(MCOperand::CreateImm(index));
3819 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3820 uint64_t Address, const void *Decoder) {
3821 DecodeStatus S = MCDisassembler::Success;
3823 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3824 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3825 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3826 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3827 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3834 return MCDisassembler::Fail;
3836 if (fieldFromInstruction32(Insn, 4, 1))
3837 return MCDisassembler::Fail; // UNDEFINED
3838 index = fieldFromInstruction32(Insn, 5, 3);
3841 if (fieldFromInstruction32(Insn, 4, 1))
3842 return MCDisassembler::Fail; // UNDEFINED
3843 index = fieldFromInstruction32(Insn, 6, 2);
3844 if (fieldFromInstruction32(Insn, 5, 1))
3848 if (fieldFromInstruction32(Insn, 4, 2))
3849 return MCDisassembler::Fail; // UNDEFINED
3850 index = fieldFromInstruction32(Insn, 7, 1);
3851 if (fieldFromInstruction32(Insn, 6, 1))
3856 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3857 return MCDisassembler::Fail;
3858 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3859 return MCDisassembler::Fail;
3860 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3861 return MCDisassembler::Fail;
3863 if (Rm != 0xF) { // Writeback
3864 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3865 return MCDisassembler::Fail;
3867 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3868 return MCDisassembler::Fail;
3869 Inst.addOperand(MCOperand::CreateImm(align));
3872 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3873 return MCDisassembler::Fail;
3875 Inst.addOperand(MCOperand::CreateReg(0));
3878 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3879 return MCDisassembler::Fail;
3880 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3881 return MCDisassembler::Fail;
3882 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3883 return MCDisassembler::Fail;
3884 Inst.addOperand(MCOperand::CreateImm(index));
3889 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
3890 uint64_t Address, const void *Decoder) {
3891 DecodeStatus S = MCDisassembler::Success;
3893 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3894 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3895 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3896 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3897 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3904 return MCDisassembler::Fail;
3906 if (fieldFromInstruction32(Insn, 4, 1))
3907 return MCDisassembler::Fail; // UNDEFINED
3908 index = fieldFromInstruction32(Insn, 5, 3);
3911 if (fieldFromInstruction32(Insn, 4, 1))
3912 return MCDisassembler::Fail; // UNDEFINED
3913 index = fieldFromInstruction32(Insn, 6, 2);
3914 if (fieldFromInstruction32(Insn, 5, 1))
3918 if (fieldFromInstruction32(Insn, 4, 2))
3919 return MCDisassembler::Fail; // UNDEFINED
3920 index = fieldFromInstruction32(Insn, 7, 1);
3921 if (fieldFromInstruction32(Insn, 6, 1))
3926 if (Rm != 0xF) { // Writeback
3927 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3928 return MCDisassembler::Fail;
3930 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3931 return MCDisassembler::Fail;
3932 Inst.addOperand(MCOperand::CreateImm(align));
3935 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3936 return MCDisassembler::Fail;
3938 Inst.addOperand(MCOperand::CreateReg(0));
3941 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3942 return MCDisassembler::Fail;
3943 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3944 return MCDisassembler::Fail;
3945 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3946 return MCDisassembler::Fail;
3947 Inst.addOperand(MCOperand::CreateImm(index));
3953 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
3954 uint64_t Address, const void *Decoder) {
3955 DecodeStatus S = MCDisassembler::Success;
3957 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3958 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3959 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3960 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3961 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3968 return MCDisassembler::Fail;
3970 if (fieldFromInstruction32(Insn, 4, 1))
3972 index = fieldFromInstruction32(Insn, 5, 3);
3975 if (fieldFromInstruction32(Insn, 4, 1))
3977 index = fieldFromInstruction32(Insn, 6, 2);
3978 if (fieldFromInstruction32(Insn, 5, 1))
3982 if (fieldFromInstruction32(Insn, 4, 2))
3983 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3984 index = fieldFromInstruction32(Insn, 7, 1);
3985 if (fieldFromInstruction32(Insn, 6, 1))
3990 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3991 return MCDisassembler::Fail;
3992 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3993 return MCDisassembler::Fail;
3994 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3995 return MCDisassembler::Fail;
3996 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3997 return MCDisassembler::Fail;
3999 if (Rm != 0xF) { // Writeback
4000 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4001 return MCDisassembler::Fail;
4003 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4004 return MCDisassembler::Fail;
4005 Inst.addOperand(MCOperand::CreateImm(align));
4008 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4009 return MCDisassembler::Fail;
4011 Inst.addOperand(MCOperand::CreateReg(0));
4014 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4015 return MCDisassembler::Fail;
4016 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4017 return MCDisassembler::Fail;
4018 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4019 return MCDisassembler::Fail;
4020 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4021 return MCDisassembler::Fail;
4022 Inst.addOperand(MCOperand::CreateImm(index));
4027 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4028 uint64_t Address, const void *Decoder) {
4029 DecodeStatus S = MCDisassembler::Success;
4031 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4032 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
4033 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
4034 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
4035 unsigned size = fieldFromInstruction32(Insn, 10, 2);
4042 return MCDisassembler::Fail;
4044 if (fieldFromInstruction32(Insn, 4, 1))
4046 index = fieldFromInstruction32(Insn, 5, 3);
4049 if (fieldFromInstruction32(Insn, 4, 1))
4051 index = fieldFromInstruction32(Insn, 6, 2);
4052 if (fieldFromInstruction32(Insn, 5, 1))
4056 if (fieldFromInstruction32(Insn, 4, 2))
4057 align = 4 << fieldFromInstruction32(Insn, 4, 2);
4058 index = fieldFromInstruction32(Insn, 7, 1);
4059 if (fieldFromInstruction32(Insn, 6, 1))
4064 if (Rm != 0xF) { // Writeback
4065 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4066 return MCDisassembler::Fail;
4068 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4069 return MCDisassembler::Fail;
4070 Inst.addOperand(MCOperand::CreateImm(align));
4073 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4074 return MCDisassembler::Fail;
4076 Inst.addOperand(MCOperand::CreateReg(0));
4079 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4080 return MCDisassembler::Fail;
4081 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4082 return MCDisassembler::Fail;
4083 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4084 return MCDisassembler::Fail;
4085 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4086 return MCDisassembler::Fail;
4087 Inst.addOperand(MCOperand::CreateImm(index));
4092 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4093 uint64_t Address, const void *Decoder) {
4094 DecodeStatus S = MCDisassembler::Success;
4095 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4096 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
4097 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
4098 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
4099 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
4101 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4102 S = MCDisassembler::SoftFail;
4104 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4105 return MCDisassembler::Fail;
4106 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4107 return MCDisassembler::Fail;
4108 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4109 return MCDisassembler::Fail;
4110 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4111 return MCDisassembler::Fail;
4112 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4113 return MCDisassembler::Fail;
4118 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4119 uint64_t Address, const void *Decoder) {
4120 DecodeStatus S = MCDisassembler::Success;
4121 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4122 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
4123 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
4124 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
4125 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
4127 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4128 S = MCDisassembler::SoftFail;
4130 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4131 return MCDisassembler::Fail;
4132 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4133 return MCDisassembler::Fail;
4134 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4135 return MCDisassembler::Fail;
4136 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4137 return MCDisassembler::Fail;
4138 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4139 return MCDisassembler::Fail;
4144 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4145 uint64_t Address, const void *Decoder) {
4146 DecodeStatus S = MCDisassembler::Success;
4147 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
4148 // The InstPrinter needs to have the low bit of the predicate in
4149 // the mask operand to be able to print it properly.
4150 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
4154 S = MCDisassembler::SoftFail;
4157 if ((mask & 0xF) == 0) {
4158 // Preserve the high bit of the mask, which is the low bit of
4162 S = MCDisassembler::SoftFail;
4165 Inst.addOperand(MCOperand::CreateImm(pred));
4166 Inst.addOperand(MCOperand::CreateImm(mask));
4171 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4172 uint64_t Address, const void *Decoder) {
4173 DecodeStatus S = MCDisassembler::Success;
4175 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4176 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
4177 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4178 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
4179 unsigned W = fieldFromInstruction32(Insn, 21, 1);
4180 unsigned U = fieldFromInstruction32(Insn, 23, 1);
4181 unsigned P = fieldFromInstruction32(Insn, 24, 1);
4182 bool writeback = (W == 1) | (P == 0);
4184 addr |= (U << 8) | (Rn << 9);
4186 if (writeback && (Rn == Rt || Rn == Rt2))
4187 Check(S, MCDisassembler::SoftFail);
4189 Check(S, MCDisassembler::SoftFail);
4192 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4193 return MCDisassembler::Fail;
4195 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4196 return MCDisassembler::Fail;
4197 // Writeback operand
4198 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4199 return MCDisassembler::Fail;
4201 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4202 return MCDisassembler::Fail;
4208 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4209 uint64_t Address, const void *Decoder) {
4210 DecodeStatus S = MCDisassembler::Success;
4212 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4213 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
4214 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4215 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
4216 unsigned W = fieldFromInstruction32(Insn, 21, 1);
4217 unsigned U = fieldFromInstruction32(Insn, 23, 1);
4218 unsigned P = fieldFromInstruction32(Insn, 24, 1);
4219 bool writeback = (W == 1) | (P == 0);
4221 addr |= (U << 8) | (Rn << 9);
4223 if (writeback && (Rn == Rt || Rn == Rt2))
4224 Check(S, MCDisassembler::SoftFail);
4226 // Writeback operand
4227 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4228 return MCDisassembler::Fail;
4230 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4231 return MCDisassembler::Fail;
4233 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4234 return MCDisassembler::Fail;
4236 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4237 return MCDisassembler::Fail;
4242 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4243 uint64_t Address, const void *Decoder) {
4244 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
4245 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
4246 if (sign1 != sign2) return MCDisassembler::Fail;
4248 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
4249 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
4250 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
4252 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4254 return MCDisassembler::Success;
4257 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4259 const void *Decoder) {
4260 DecodeStatus S = MCDisassembler::Success;
4262 // Shift of "asr #32" is not allowed in Thumb2 mode.
4263 if (Val == 0x20) S = MCDisassembler::SoftFail;
4264 Inst.addOperand(MCOperand::CreateImm(Val));
4268 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4269 uint64_t Address, const void *Decoder) {
4270 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4271 unsigned Rt2 = fieldFromInstruction32(Insn, 0, 4);
4272 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4273 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
4276 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4278 DecodeStatus S = MCDisassembler::Success;
4279 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4280 return MCDisassembler::Fail;
4281 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4282 return MCDisassembler::Fail;
4283 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4284 return MCDisassembler::Fail;
4285 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4286 return MCDisassembler::Fail;
4291 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4292 uint64_t Address, const void *Decoder) {
4293 unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
4294 Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
4295 unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
4296 Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
4297 unsigned imm = fieldFromInstruction32(Insn, 16, 6);
4298 unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
4300 DecodeStatus S = MCDisassembler::Success;
4302 // VMOVv2f32 is ambiguous with these decodings.
4303 if (!(imm & 0x38) && cmode == 0xF) {
4304 Inst.setOpcode(ARM::VMOVv2f32);
4305 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4308 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4310 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4311 return MCDisassembler::Fail;
4312 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4313 return MCDisassembler::Fail;
4314 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4319 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4320 uint64_t Address, const void *Decoder) {
4321 unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
4322 Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
4323 unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
4324 Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
4325 unsigned imm = fieldFromInstruction32(Insn, 16, 6);
4326 unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
4328 DecodeStatus S = MCDisassembler::Success;
4330 // VMOVv4f32 is ambiguous with these decodings.
4331 if (!(imm & 0x38) && cmode == 0xF) {
4332 Inst.setOpcode(ARM::VMOVv4f32);
4333 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4336 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4338 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4339 return MCDisassembler::Fail;
4340 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4341 return MCDisassembler::Fail;
4342 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4347 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4348 uint64_t Address, const void *Decoder) {
4349 DecodeStatus S = MCDisassembler::Success;
4351 unsigned Rn = fieldFromInstruction32(Val, 16, 4);
4352 unsigned Rt = fieldFromInstruction32(Val, 12, 4);
4353 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
4354 Rm |= (fieldFromInstruction32(Val, 23, 1) << 4);
4355 unsigned Cond = fieldFromInstruction32(Val, 28, 4);
4357 if (fieldFromInstruction32(Val, 8, 4) != 0 || Rn == Rt)
4358 S = MCDisassembler::SoftFail;
4360 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4361 return MCDisassembler::Fail;
4362 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4363 return MCDisassembler::Fail;
4364 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4365 return MCDisassembler::Fail;
4366 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4367 return MCDisassembler::Fail;
4368 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4369 return MCDisassembler::Fail;