1 //===-- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #define DEBUG_TYPE "arm-disassembler"
12 #include "MCTargetDesc/ARMAddressingModes.h"
13 #include "MCTargetDesc/ARMMCExpr.h"
14 #include "MCTargetDesc/ARMBaseInfo.h"
15 #include "llvm/MC/EDInstInfo.h"
16 #include "llvm/MC/MCInst.h"
17 #include "llvm/MC/MCInstrDesc.h"
18 #include "llvm/MC/MCExpr.h"
19 #include "llvm/MC/MCContext.h"
20 #include "llvm/MC/MCDisassembler.h"
21 #include "llvm/MC/MCSubtargetInfo.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/MemoryObject.h"
24 #include "llvm/Support/ErrorHandling.h"
25 #include "llvm/Support/TargetRegistry.h"
26 #include "llvm/Support/raw_ostream.h"
30 typedef MCDisassembler::DecodeStatus DecodeStatus;
33 /// ARMDisassembler - ARM disassembler for all ARM platforms.
34 class ARMDisassembler : public MCDisassembler {
36 /// Constructor - Initializes the disassembler.
38 ARMDisassembler(const MCSubtargetInfo &STI) :
45 /// getInstruction - See MCDisassembler.
46 DecodeStatus getInstruction(MCInst &instr,
48 const MemoryObject ®ion,
51 raw_ostream &cStream) const;
53 /// getEDInfo - See MCDisassembler.
54 const EDInstInfo *getEDInfo() const;
58 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
59 class ThumbDisassembler : public MCDisassembler {
61 /// Constructor - Initializes the disassembler.
63 ThumbDisassembler(const MCSubtargetInfo &STI) :
67 ~ThumbDisassembler() {
70 /// getInstruction - See MCDisassembler.
71 DecodeStatus getInstruction(MCInst &instr,
73 const MemoryObject ®ion,
76 raw_ostream &cStream) const;
78 /// getEDInfo - See MCDisassembler.
79 const EDInstInfo *getEDInfo() const;
81 mutable std::vector<unsigned> ITBlock;
82 DecodeStatus AddThumbPredicate(MCInst&) const;
83 void UpdateThumbVFPPredicate(MCInst&) const;
87 static bool Check(DecodeStatus &Out, DecodeStatus In) {
89 case MCDisassembler::Success:
90 // Out stays the same.
92 case MCDisassembler::SoftFail:
95 case MCDisassembler::Fail:
99 llvm_unreachable("Invalid DecodeStatus!");
103 // Forward declare these because the autogenerated code will reference them.
104 // Definitions are further down.
105 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
106 uint64_t Address, const void *Decoder);
107 static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
108 unsigned RegNo, uint64_t Address,
109 const void *Decoder);
110 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
111 uint64_t Address, const void *Decoder);
112 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
113 uint64_t Address, const void *Decoder);
114 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
115 uint64_t Address, const void *Decoder);
116 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
117 uint64_t Address, const void *Decoder);
118 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
119 uint64_t Address, const void *Decoder);
120 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
121 uint64_t Address, const void *Decoder);
122 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
125 const void *Decoder);
126 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
127 uint64_t Address, const void *Decoder);
128 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
129 uint64_t Address, const void *Decoder);
130 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
131 unsigned RegNo, uint64_t Address,
132 const void *Decoder);
134 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
135 uint64_t Address, const void *Decoder);
136 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
137 uint64_t Address, const void *Decoder);
138 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
139 uint64_t Address, const void *Decoder);
140 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
141 uint64_t Address, const void *Decoder);
142 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
143 uint64_t Address, const void *Decoder);
144 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
145 uint64_t Address, const void *Decoder);
147 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
148 uint64_t Address, const void *Decoder);
149 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
150 uint64_t Address, const void *Decoder);
151 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
154 const void *Decoder);
155 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
156 uint64_t Address, const void *Decoder);
157 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
158 uint64_t Address, const void *Decoder);
159 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
160 uint64_t Address, const void *Decoder);
161 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
162 uint64_t Address, const void *Decoder);
164 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
167 const void *Decoder);
168 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
169 uint64_t Address, const void *Decoder);
170 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
171 uint64_t Address, const void *Decoder);
172 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
173 uint64_t Address, const void *Decoder);
174 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
175 uint64_t Address, const void *Decoder);
176 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
177 uint64_t Address, const void *Decoder);
178 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
179 uint64_t Address, const void *Decoder);
180 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
181 uint64_t Address, const void *Decoder);
182 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
183 uint64_t Address, const void *Decoder);
184 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
185 uint64_t Address, const void *Decoder);
186 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
188 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
201 uint64_t Address, const void *Decoder);
202 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
203 uint64_t Address, const void *Decoder);
204 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
205 uint64_t Address, const void *Decoder);
206 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
207 uint64_t Address, const void *Decoder);
208 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
209 uint64_t Address, const void *Decoder);
210 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
211 uint64_t Address, const void *Decoder);
212 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
213 uint64_t Address, const void *Decoder);
214 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
215 uint64_t Address, const void *Decoder);
216 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
217 uint64_t Address, const void *Decoder);
218 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
219 uint64_t Address, const void *Decoder);
220 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
221 uint64_t Address, const void *Decoder);
222 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
223 uint64_t Address, const void *Decoder);
224 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
225 uint64_t Address, const void *Decoder);
226 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
227 uint64_t Address, const void *Decoder);
228 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
229 uint64_t Address, const void *Decoder);
230 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
231 uint64_t Address, const void *Decoder);
232 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
233 uint64_t Address, const void *Decoder);
234 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
235 uint64_t Address, const void *Decoder);
236 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
237 uint64_t Address, const void *Decoder);
238 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
239 uint64_t Address, const void *Decoder);
240 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
241 uint64_t Address, const void *Decoder);
242 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
243 uint64_t Address, const void *Decoder);
244 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
245 uint64_t Address, const void *Decoder);
246 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
247 uint64_t Address, const void *Decoder);
248 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
249 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
251 uint64_t Address, const void *Decoder);
252 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
253 uint64_t Address, const void *Decoder);
254 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
255 uint64_t Address, const void *Decoder);
256 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
257 uint64_t Address, const void *Decoder);
258 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
259 uint64_t Address, const void *Decoder);
262 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
263 uint64_t Address, const void *Decoder);
264 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
265 uint64_t Address, const void *Decoder);
266 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
267 uint64_t Address, const void *Decoder);
268 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
269 uint64_t Address, const void *Decoder);
270 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
271 uint64_t Address, const void *Decoder);
272 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
307 uint64_t Address, const void *Decoder);
308 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
309 uint64_t Address, const void *Decoder);
310 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
311 uint64_t Address, const void *Decoder);
312 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
313 uint64_t Address, const void *Decoder);
314 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
315 uint64_t Address, const void *Decoder);
316 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
317 uint64_t Address, const void *Decoder);
318 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
319 uint64_t Address, const void *Decoder);
320 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
321 uint64_t Address, const void *Decoder);
322 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
323 uint64_t Address, const void *Decoder);
325 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
326 uint64_t Address, const void *Decoder);
327 #include "ARMGenDisassemblerTables.inc"
328 #include "ARMGenInstrInfo.inc"
329 #include "ARMGenEDInfo.inc"
331 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
332 return new ARMDisassembler(STI);
335 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
336 return new ThumbDisassembler(STI);
339 const EDInstInfo *ARMDisassembler::getEDInfo() const {
343 const EDInstInfo *ThumbDisassembler::getEDInfo() const {
347 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
348 const MemoryObject &Region,
351 raw_ostream &cs) const {
356 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
357 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
359 // We want to read exactly 4 bytes of data.
360 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
362 return MCDisassembler::Fail;
365 // Encoded as a small-endian 32-bit word in the stream.
366 uint32_t insn = (bytes[3] << 24) |
371 // Calling the auto-generated decoder function.
372 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
373 if (result != MCDisassembler::Fail) {
378 // VFP and NEON instructions, similarly, are shared between ARM
381 result = decodeVFPInstruction32(MI, insn, Address, this, STI);
382 if (result != MCDisassembler::Fail) {
388 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
389 if (result != MCDisassembler::Fail) {
391 // Add a fake predicate operand, because we share these instruction
392 // definitions with Thumb2 where these instructions are predicable.
393 if (!DecodePredicateOperand(MI, 0xE, Address, this))
394 return MCDisassembler::Fail;
399 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
400 if (result != MCDisassembler::Fail) {
402 // Add a fake predicate operand, because we share these instruction
403 // definitions with Thumb2 where these instructions are predicable.
404 if (!DecodePredicateOperand(MI, 0xE, Address, this))
405 return MCDisassembler::Fail;
410 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
411 if (result != MCDisassembler::Fail) {
413 // Add a fake predicate operand, because we share these instruction
414 // definitions with Thumb2 where these instructions are predicable.
415 if (!DecodePredicateOperand(MI, 0xE, Address, this))
416 return MCDisassembler::Fail;
423 return MCDisassembler::Fail;
427 extern const MCInstrDesc ARMInsts[];
430 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
431 /// immediate Value in the MCInst. The immediate Value has had any PC
432 /// adjustment made by the caller. If the instruction is a branch instruction
433 /// then isBranch is true, else false. If the getOpInfo() function was set as
434 /// part of the setupForSymbolicDisassembly() call then that function is called
435 /// to get any symbolic information at the Address for this instruction. If
436 /// that returns non-zero then the symbolic information it returns is used to
437 /// create an MCExpr and that is added as an operand to the MCInst. If
438 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
439 /// Value is done and if a symbol is found an MCExpr is created with that, else
440 /// an MCExpr with Value is created. This function returns true if it adds an
441 /// operand to the MCInst and false otherwise.
442 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
443 bool isBranch, uint64_t InstSize,
444 MCInst &MI, const void *Decoder) {
445 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
446 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
447 struct LLVMOpInfo1 SymbolicOp;
448 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
449 SymbolicOp.Value = Value;
450 void *DisInfo = Dis->getDisInfoBlock();
453 !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
454 // Clear SymbolicOp.Value from above and also all other fields.
455 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
456 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
459 uint64_t ReferenceType;
461 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
463 ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
464 const char *ReferenceName;
465 const char *Name = SymbolLookUp(DisInfo, Value, &ReferenceType, Address,
468 SymbolicOp.AddSymbol.Name = Name;
469 SymbolicOp.AddSymbol.Present = true;
471 // For branches always create an MCExpr so it gets printed as hex address.
473 SymbolicOp.Value = Value;
475 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
476 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
477 if (!Name && !isBranch)
481 MCContext *Ctx = Dis->getMCContext();
482 const MCExpr *Add = NULL;
483 if (SymbolicOp.AddSymbol.Present) {
484 if (SymbolicOp.AddSymbol.Name) {
485 StringRef Name(SymbolicOp.AddSymbol.Name);
486 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
487 Add = MCSymbolRefExpr::Create(Sym, *Ctx);
489 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
493 const MCExpr *Sub = NULL;
494 if (SymbolicOp.SubtractSymbol.Present) {
495 if (SymbolicOp.SubtractSymbol.Name) {
496 StringRef Name(SymbolicOp.SubtractSymbol.Name);
497 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
498 Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
500 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
504 const MCExpr *Off = NULL;
505 if (SymbolicOp.Value != 0)
506 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
512 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
514 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
516 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
521 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
528 Expr = MCConstantExpr::Create(0, *Ctx);
531 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
532 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
533 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
534 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
535 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
536 MI.addOperand(MCOperand::CreateExpr(Expr));
538 llvm_unreachable("bad SymbolicOp.VariantKind");
543 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
544 /// referenced by a load instruction with the base register that is the Pc.
545 /// These can often be values in a literal pool near the Address of the
546 /// instruction. The Address of the instruction and its immediate Value are
547 /// used as a possible literal pool entry. The SymbolLookUp call back will
548 /// return the name of a symbol referenced by the the literal pool's entry if
549 /// the referenced address is that of a symbol. Or it will return a pointer to
550 /// a literal 'C' string if the referenced address of the literal pool's entry
551 /// is an address into a section with 'C' string literals.
552 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
553 const void *Decoder) {
554 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
555 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
557 void *DisInfo = Dis->getDisInfoBlock();
558 uint64_t ReferenceType;
559 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
560 const char *ReferenceName;
561 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
562 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
563 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
564 (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
568 // Thumb1 instructions don't have explicit S bits. Rather, they
569 // implicitly set CPSR. Since it's not represented in the encoding, the
570 // auto-generated decoder won't inject the CPSR operand. We need to fix
571 // that as a post-pass.
572 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
573 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
574 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
575 MCInst::iterator I = MI.begin();
576 for (unsigned i = 0; i < NumOps; ++i, ++I) {
577 if (I == MI.end()) break;
578 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
579 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
580 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
585 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
588 // Most Thumb instructions don't have explicit predicates in the
589 // encoding, but rather get their predicates from IT context. We need
590 // to fix up the predicate operands using this context information as a
592 MCDisassembler::DecodeStatus
593 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
594 MCDisassembler::DecodeStatus S = Success;
596 // A few instructions actually have predicates encoded in them. Don't
597 // try to overwrite it if we're seeing one of those.
598 switch (MI.getOpcode()) {
609 // Some instructions (mostly conditional branches) are not
610 // allowed in IT blocks.
611 if (!ITBlock.empty())
620 // Some instructions (mostly unconditional branches) can
621 // only appears at the end of, or outside of, an IT.
622 if (ITBlock.size() > 1)
629 // If we're in an IT block, base the predicate on that. Otherwise,
630 // assume a predicate of AL.
632 if (!ITBlock.empty()) {
640 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
641 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
642 MCInst::iterator I = MI.begin();
643 for (unsigned i = 0; i < NumOps; ++i, ++I) {
644 if (I == MI.end()) break;
645 if (OpInfo[i].isPredicate()) {
646 I = MI.insert(I, MCOperand::CreateImm(CC));
649 MI.insert(I, MCOperand::CreateReg(0));
651 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
656 I = MI.insert(I, MCOperand::CreateImm(CC));
659 MI.insert(I, MCOperand::CreateReg(0));
661 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
666 // Thumb VFP instructions are a special case. Because we share their
667 // encodings between ARM and Thumb modes, and they are predicable in ARM
668 // mode, the auto-generated decoder will give them an (incorrect)
669 // predicate operand. We need to rewrite these operands based on the IT
670 // context as a post-pass.
671 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
673 if (!ITBlock.empty()) {
679 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
680 MCInst::iterator I = MI.begin();
681 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
682 for (unsigned i = 0; i < NumOps; ++i, ++I) {
683 if (OpInfo[i].isPredicate() ) {
689 I->setReg(ARM::CPSR);
695 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
696 const MemoryObject &Region,
699 raw_ostream &cs) const {
704 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
705 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
707 // We want to read exactly 2 bytes of data.
708 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
710 return MCDisassembler::Fail;
713 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
714 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
715 if (result != MCDisassembler::Fail) {
717 Check(result, AddThumbPredicate(MI));
722 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
725 bool InITBlock = !ITBlock.empty();
726 Check(result, AddThumbPredicate(MI));
727 AddThumb1SBit(MI, InITBlock);
732 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
733 if (result != MCDisassembler::Fail) {
736 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
737 // the Thumb predicate.
738 if (MI.getOpcode() == ARM::t2IT && !ITBlock.empty())
739 result = MCDisassembler::SoftFail;
741 Check(result, AddThumbPredicate(MI));
743 // If we find an IT instruction, we need to parse its condition
744 // code and mask operands so that we can apply them correctly
745 // to the subsequent instructions.
746 if (MI.getOpcode() == ARM::t2IT) {
748 // (3 - the number of trailing zeros) is the number of then / else.
749 unsigned firstcond = MI.getOperand(0).getImm();
750 unsigned Mask = MI.getOperand(1).getImm();
751 unsigned CondBit0 = Mask >> 4 & 1;
752 unsigned NumTZ = CountTrailingZeros_32(Mask);
753 assert(NumTZ <= 3 && "Invalid IT mask!");
754 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
755 bool T = ((Mask >> Pos) & 1) == CondBit0;
757 ITBlock.insert(ITBlock.begin(), firstcond);
759 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
762 ITBlock.push_back(firstcond);
768 // We want to read exactly 4 bytes of data.
769 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
771 return MCDisassembler::Fail;
774 uint32_t insn32 = (bytes[3] << 8) |
779 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
780 if (result != MCDisassembler::Fail) {
782 bool InITBlock = ITBlock.size();
783 Check(result, AddThumbPredicate(MI));
784 AddThumb1SBit(MI, InITBlock);
789 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
790 if (result != MCDisassembler::Fail) {
792 Check(result, AddThumbPredicate(MI));
797 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
798 if (result != MCDisassembler::Fail) {
800 UpdateThumbVFPPredicate(MI);
805 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
806 if (result != MCDisassembler::Fail) {
808 Check(result, AddThumbPredicate(MI));
812 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
814 uint32_t NEONLdStInsn = insn32;
815 NEONLdStInsn &= 0xF0FFFFFF;
816 NEONLdStInsn |= 0x04000000;
817 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
818 if (result != MCDisassembler::Fail) {
820 Check(result, AddThumbPredicate(MI));
825 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
827 uint32_t NEONDataInsn = insn32;
828 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
829 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
830 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
831 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
832 if (result != MCDisassembler::Fail) {
834 Check(result, AddThumbPredicate(MI));
840 return MCDisassembler::Fail;
844 extern "C" void LLVMInitializeARMDisassembler() {
845 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
846 createARMDisassembler);
847 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
848 createThumbDisassembler);
851 static const uint16_t GPRDecoderTable[] = {
852 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
853 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
854 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
855 ARM::R12, ARM::SP, ARM::LR, ARM::PC
858 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
859 uint64_t Address, const void *Decoder) {
861 return MCDisassembler::Fail;
863 unsigned Register = GPRDecoderTable[RegNo];
864 Inst.addOperand(MCOperand::CreateReg(Register));
865 return MCDisassembler::Success;
869 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
870 uint64_t Address, const void *Decoder) {
871 DecodeStatus S = MCDisassembler::Success;
874 S = MCDisassembler::SoftFail;
876 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
881 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
882 uint64_t Address, const void *Decoder) {
884 return MCDisassembler::Fail;
885 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
888 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
889 uint64_t Address, const void *Decoder) {
890 unsigned Register = 0;
911 return MCDisassembler::Fail;
914 Inst.addOperand(MCOperand::CreateReg(Register));
915 return MCDisassembler::Success;
918 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
919 uint64_t Address, const void *Decoder) {
920 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
921 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
924 static const uint16_t SPRDecoderTable[] = {
925 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
926 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
927 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
928 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
929 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
930 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
931 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
932 ARM::S28, ARM::S29, ARM::S30, ARM::S31
935 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
936 uint64_t Address, const void *Decoder) {
938 return MCDisassembler::Fail;
940 unsigned Register = SPRDecoderTable[RegNo];
941 Inst.addOperand(MCOperand::CreateReg(Register));
942 return MCDisassembler::Success;
945 static const uint16_t DPRDecoderTable[] = {
946 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
947 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
948 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
949 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
950 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
951 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
952 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
953 ARM::D28, ARM::D29, ARM::D30, ARM::D31
956 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
957 uint64_t Address, const void *Decoder) {
959 return MCDisassembler::Fail;
961 unsigned Register = DPRDecoderTable[RegNo];
962 Inst.addOperand(MCOperand::CreateReg(Register));
963 return MCDisassembler::Success;
966 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
967 uint64_t Address, const void *Decoder) {
969 return MCDisassembler::Fail;
970 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
974 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
975 uint64_t Address, const void *Decoder) {
977 return MCDisassembler::Fail;
978 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
981 static const uint16_t QPRDecoderTable[] = {
982 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
983 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
984 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
985 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
989 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
990 uint64_t Address, const void *Decoder) {
992 return MCDisassembler::Fail;
995 unsigned Register = QPRDecoderTable[RegNo];
996 Inst.addOperand(MCOperand::CreateReg(Register));
997 return MCDisassembler::Success;
1000 static const uint16_t DPairDecoderTable[] = {
1001 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1002 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1003 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1004 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1005 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1009 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1010 uint64_t Address, const void *Decoder) {
1012 return MCDisassembler::Fail;
1014 unsigned Register = DPairDecoderTable[RegNo];
1015 Inst.addOperand(MCOperand::CreateReg(Register));
1016 return MCDisassembler::Success;
1019 static const uint16_t DPairSpacedDecoderTable[] = {
1020 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1021 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1022 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1023 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1024 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1025 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1026 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1027 ARM::D28_D30, ARM::D29_D31
1030 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1033 const void *Decoder) {
1035 return MCDisassembler::Fail;
1037 unsigned Register = DPairSpacedDecoderTable[RegNo];
1038 Inst.addOperand(MCOperand::CreateReg(Register));
1039 return MCDisassembler::Success;
1042 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1043 uint64_t Address, const void *Decoder) {
1044 if (Val == 0xF) return MCDisassembler::Fail;
1045 // AL predicate is not allowed on Thumb1 branches.
1046 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1047 return MCDisassembler::Fail;
1048 Inst.addOperand(MCOperand::CreateImm(Val));
1049 if (Val == ARMCC::AL) {
1050 Inst.addOperand(MCOperand::CreateReg(0));
1052 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1053 return MCDisassembler::Success;
1056 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1057 uint64_t Address, const void *Decoder) {
1059 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1061 Inst.addOperand(MCOperand::CreateReg(0));
1062 return MCDisassembler::Success;
1065 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1066 uint64_t Address, const void *Decoder) {
1067 uint32_t imm = Val & 0xFF;
1068 uint32_t rot = (Val & 0xF00) >> 7;
1069 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1070 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1071 return MCDisassembler::Success;
1074 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1075 uint64_t Address, const void *Decoder) {
1076 DecodeStatus S = MCDisassembler::Success;
1078 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1079 unsigned type = fieldFromInstruction32(Val, 5, 2);
1080 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1082 // Register-immediate
1083 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1084 return MCDisassembler::Fail;
1086 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1089 Shift = ARM_AM::lsl;
1092 Shift = ARM_AM::lsr;
1095 Shift = ARM_AM::asr;
1098 Shift = ARM_AM::ror;
1102 if (Shift == ARM_AM::ror && imm == 0)
1103 Shift = ARM_AM::rrx;
1105 unsigned Op = Shift | (imm << 3);
1106 Inst.addOperand(MCOperand::CreateImm(Op));
1111 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1112 uint64_t Address, const void *Decoder) {
1113 DecodeStatus S = MCDisassembler::Success;
1115 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1116 unsigned type = fieldFromInstruction32(Val, 5, 2);
1117 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
1119 // Register-register
1120 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1121 return MCDisassembler::Fail;
1122 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1123 return MCDisassembler::Fail;
1125 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1128 Shift = ARM_AM::lsl;
1131 Shift = ARM_AM::lsr;
1134 Shift = ARM_AM::asr;
1137 Shift = ARM_AM::ror;
1141 Inst.addOperand(MCOperand::CreateImm(Shift));
1146 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1147 uint64_t Address, const void *Decoder) {
1148 DecodeStatus S = MCDisassembler::Success;
1150 bool writebackLoad = false;
1151 unsigned writebackReg = 0;
1152 switch (Inst.getOpcode()) {
1155 case ARM::LDMIA_UPD:
1156 case ARM::LDMDB_UPD:
1157 case ARM::LDMIB_UPD:
1158 case ARM::LDMDA_UPD:
1159 case ARM::t2LDMIA_UPD:
1160 case ARM::t2LDMDB_UPD:
1161 writebackLoad = true;
1162 writebackReg = Inst.getOperand(0).getReg();
1166 // Empty register lists are not allowed.
1167 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1168 for (unsigned i = 0; i < 16; ++i) {
1169 if (Val & (1 << i)) {
1170 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1171 return MCDisassembler::Fail;
1172 // Writeback not allowed if Rn is in the target list.
1173 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1174 Check(S, MCDisassembler::SoftFail);
1181 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1182 uint64_t Address, const void *Decoder) {
1183 DecodeStatus S = MCDisassembler::Success;
1185 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1186 unsigned regs = Val & 0xFF;
1188 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1189 return MCDisassembler::Fail;
1190 for (unsigned i = 0; i < (regs - 1); ++i) {
1191 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1192 return MCDisassembler::Fail;
1198 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1199 uint64_t Address, const void *Decoder) {
1200 DecodeStatus S = MCDisassembler::Success;
1202 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1203 unsigned regs = (Val & 0xFF) / 2;
1205 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1206 return MCDisassembler::Fail;
1207 for (unsigned i = 0; i < (regs - 1); ++i) {
1208 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1209 return MCDisassembler::Fail;
1215 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1216 uint64_t Address, const void *Decoder) {
1217 // This operand encodes a mask of contiguous zeros between a specified MSB
1218 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1219 // the mask of all bits LSB-and-lower, and then xor them to create
1220 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1221 // create the final mask.
1222 unsigned msb = fieldFromInstruction32(Val, 5, 5);
1223 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
1225 DecodeStatus S = MCDisassembler::Success;
1226 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1228 uint32_t msb_mask = 0xFFFFFFFF;
1229 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1230 uint32_t lsb_mask = (1U << lsb) - 1;
1232 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1236 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1237 uint64_t Address, const void *Decoder) {
1238 DecodeStatus S = MCDisassembler::Success;
1240 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1241 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
1242 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
1243 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
1244 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1245 unsigned U = fieldFromInstruction32(Insn, 23, 1);
1247 switch (Inst.getOpcode()) {
1248 case ARM::LDC_OFFSET:
1251 case ARM::LDC_OPTION:
1252 case ARM::LDCL_OFFSET:
1254 case ARM::LDCL_POST:
1255 case ARM::LDCL_OPTION:
1256 case ARM::STC_OFFSET:
1259 case ARM::STC_OPTION:
1260 case ARM::STCL_OFFSET:
1262 case ARM::STCL_POST:
1263 case ARM::STCL_OPTION:
1264 case ARM::t2LDC_OFFSET:
1265 case ARM::t2LDC_PRE:
1266 case ARM::t2LDC_POST:
1267 case ARM::t2LDC_OPTION:
1268 case ARM::t2LDCL_OFFSET:
1269 case ARM::t2LDCL_PRE:
1270 case ARM::t2LDCL_POST:
1271 case ARM::t2LDCL_OPTION:
1272 case ARM::t2STC_OFFSET:
1273 case ARM::t2STC_PRE:
1274 case ARM::t2STC_POST:
1275 case ARM::t2STC_OPTION:
1276 case ARM::t2STCL_OFFSET:
1277 case ARM::t2STCL_PRE:
1278 case ARM::t2STCL_POST:
1279 case ARM::t2STCL_OPTION:
1280 if (coproc == 0xA || coproc == 0xB)
1281 return MCDisassembler::Fail;
1287 Inst.addOperand(MCOperand::CreateImm(coproc));
1288 Inst.addOperand(MCOperand::CreateImm(CRd));
1289 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1290 return MCDisassembler::Fail;
1292 switch (Inst.getOpcode()) {
1293 case ARM::t2LDC2_OFFSET:
1294 case ARM::t2LDC2L_OFFSET:
1295 case ARM::t2LDC2_PRE:
1296 case ARM::t2LDC2L_PRE:
1297 case ARM::t2STC2_OFFSET:
1298 case ARM::t2STC2L_OFFSET:
1299 case ARM::t2STC2_PRE:
1300 case ARM::t2STC2L_PRE:
1301 case ARM::LDC2_OFFSET:
1302 case ARM::LDC2L_OFFSET:
1304 case ARM::LDC2L_PRE:
1305 case ARM::STC2_OFFSET:
1306 case ARM::STC2L_OFFSET:
1308 case ARM::STC2L_PRE:
1309 case ARM::t2LDC_OFFSET:
1310 case ARM::t2LDCL_OFFSET:
1311 case ARM::t2LDC_PRE:
1312 case ARM::t2LDCL_PRE:
1313 case ARM::t2STC_OFFSET:
1314 case ARM::t2STCL_OFFSET:
1315 case ARM::t2STC_PRE:
1316 case ARM::t2STCL_PRE:
1317 case ARM::LDC_OFFSET:
1318 case ARM::LDCL_OFFSET:
1321 case ARM::STC_OFFSET:
1322 case ARM::STCL_OFFSET:
1325 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1326 Inst.addOperand(MCOperand::CreateImm(imm));
1328 case ARM::t2LDC2_POST:
1329 case ARM::t2LDC2L_POST:
1330 case ARM::t2STC2_POST:
1331 case ARM::t2STC2L_POST:
1332 case ARM::LDC2_POST:
1333 case ARM::LDC2L_POST:
1334 case ARM::STC2_POST:
1335 case ARM::STC2L_POST:
1336 case ARM::t2LDC_POST:
1337 case ARM::t2LDCL_POST:
1338 case ARM::t2STC_POST:
1339 case ARM::t2STCL_POST:
1341 case ARM::LDCL_POST:
1343 case ARM::STCL_POST:
1347 // The 'option' variant doesn't encode 'U' in the immediate since
1348 // the immediate is unsigned [0,255].
1349 Inst.addOperand(MCOperand::CreateImm(imm));
1353 switch (Inst.getOpcode()) {
1354 case ARM::LDC_OFFSET:
1357 case ARM::LDC_OPTION:
1358 case ARM::LDCL_OFFSET:
1360 case ARM::LDCL_POST:
1361 case ARM::LDCL_OPTION:
1362 case ARM::STC_OFFSET:
1365 case ARM::STC_OPTION:
1366 case ARM::STCL_OFFSET:
1368 case ARM::STCL_POST:
1369 case ARM::STCL_OPTION:
1370 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1371 return MCDisassembler::Fail;
1381 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1382 uint64_t Address, const void *Decoder) {
1383 DecodeStatus S = MCDisassembler::Success;
1385 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1386 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1387 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1388 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1389 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1390 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1391 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1392 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1394 // On stores, the writeback operand precedes Rt.
1395 switch (Inst.getOpcode()) {
1396 case ARM::STR_POST_IMM:
1397 case ARM::STR_POST_REG:
1398 case ARM::STRB_POST_IMM:
1399 case ARM::STRB_POST_REG:
1400 case ARM::STRT_POST_REG:
1401 case ARM::STRT_POST_IMM:
1402 case ARM::STRBT_POST_REG:
1403 case ARM::STRBT_POST_IMM:
1404 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1405 return MCDisassembler::Fail;
1411 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1412 return MCDisassembler::Fail;
1414 // On loads, the writeback operand comes after Rt.
1415 switch (Inst.getOpcode()) {
1416 case ARM::LDR_POST_IMM:
1417 case ARM::LDR_POST_REG:
1418 case ARM::LDRB_POST_IMM:
1419 case ARM::LDRB_POST_REG:
1420 case ARM::LDRBT_POST_REG:
1421 case ARM::LDRBT_POST_IMM:
1422 case ARM::LDRT_POST_REG:
1423 case ARM::LDRT_POST_IMM:
1424 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1425 return MCDisassembler::Fail;
1431 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1432 return MCDisassembler::Fail;
1434 ARM_AM::AddrOpc Op = ARM_AM::add;
1435 if (!fieldFromInstruction32(Insn, 23, 1))
1438 bool writeback = (P == 0) || (W == 1);
1439 unsigned idx_mode = 0;
1441 idx_mode = ARMII::IndexModePre;
1442 else if (!P && writeback)
1443 idx_mode = ARMII::IndexModePost;
1445 if (writeback && (Rn == 15 || Rn == Rt))
1446 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1449 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1450 return MCDisassembler::Fail;
1451 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1452 switch( fieldFromInstruction32(Insn, 5, 2)) {
1466 return MCDisassembler::Fail;
1468 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1469 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1471 Inst.addOperand(MCOperand::CreateImm(imm));
1473 Inst.addOperand(MCOperand::CreateReg(0));
1474 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1475 Inst.addOperand(MCOperand::CreateImm(tmp));
1478 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1479 return MCDisassembler::Fail;
1484 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1485 uint64_t Address, const void *Decoder) {
1486 DecodeStatus S = MCDisassembler::Success;
1488 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1489 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1490 unsigned type = fieldFromInstruction32(Val, 5, 2);
1491 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1492 unsigned U = fieldFromInstruction32(Val, 12, 1);
1494 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1510 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1511 return MCDisassembler::Fail;
1512 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1513 return MCDisassembler::Fail;
1516 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1518 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1519 Inst.addOperand(MCOperand::CreateImm(shift));
1525 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1526 uint64_t Address, const void *Decoder) {
1527 DecodeStatus S = MCDisassembler::Success;
1529 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1530 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1531 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1532 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1533 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1534 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1535 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1536 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1537 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1538 unsigned Rt2 = Rt + 1;
1540 bool writeback = (W == 1) | (P == 0);
1542 // For {LD,ST}RD, Rt must be even, else undefined.
1543 switch (Inst.getOpcode()) {
1546 case ARM::STRD_POST:
1549 case ARM::LDRD_POST:
1550 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1555 switch (Inst.getOpcode()) {
1558 case ARM::STRD_POST:
1559 if (P == 0 && W == 1)
1560 S = MCDisassembler::SoftFail;
1562 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1563 S = MCDisassembler::SoftFail;
1564 if (type && Rm == 15)
1565 S = MCDisassembler::SoftFail;
1567 S = MCDisassembler::SoftFail;
1568 if (!type && fieldFromInstruction32(Insn, 8, 4))
1569 S = MCDisassembler::SoftFail;
1573 case ARM::STRH_POST:
1575 S = MCDisassembler::SoftFail;
1576 if (writeback && (Rn == 15 || Rn == Rt))
1577 S = MCDisassembler::SoftFail;
1578 if (!type && Rm == 15)
1579 S = MCDisassembler::SoftFail;
1583 case ARM::LDRD_POST:
1584 if (type && Rn == 15){
1586 S = MCDisassembler::SoftFail;
1589 if (P == 0 && W == 1)
1590 S = MCDisassembler::SoftFail;
1591 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1592 S = MCDisassembler::SoftFail;
1593 if (!type && writeback && Rn == 15)
1594 S = MCDisassembler::SoftFail;
1595 if (writeback && (Rn == Rt || Rn == Rt2))
1596 S = MCDisassembler::SoftFail;
1600 case ARM::LDRH_POST:
1601 if (type && Rn == 15){
1603 S = MCDisassembler::SoftFail;
1607 S = MCDisassembler::SoftFail;
1608 if (!type && Rm == 15)
1609 S = MCDisassembler::SoftFail;
1610 if (!type && writeback && (Rn == 15 || Rn == Rt))
1611 S = MCDisassembler::SoftFail;
1614 case ARM::LDRSH_PRE:
1615 case ARM::LDRSH_POST:
1617 case ARM::LDRSB_PRE:
1618 case ARM::LDRSB_POST:
1619 if (type && Rn == 15){
1621 S = MCDisassembler::SoftFail;
1624 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1625 S = MCDisassembler::SoftFail;
1626 if (!type && (Rt == 15 || Rm == 15))
1627 S = MCDisassembler::SoftFail;
1628 if (!type && writeback && (Rn == 15 || Rn == Rt))
1629 S = MCDisassembler::SoftFail;
1635 if (writeback) { // Writeback
1637 U |= ARMII::IndexModePre << 9;
1639 U |= ARMII::IndexModePost << 9;
1641 // On stores, the writeback operand precedes Rt.
1642 switch (Inst.getOpcode()) {
1645 case ARM::STRD_POST:
1648 case ARM::STRH_POST:
1649 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1650 return MCDisassembler::Fail;
1657 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1658 return MCDisassembler::Fail;
1659 switch (Inst.getOpcode()) {
1662 case ARM::STRD_POST:
1665 case ARM::LDRD_POST:
1666 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1667 return MCDisassembler::Fail;
1674 // On loads, the writeback operand comes after Rt.
1675 switch (Inst.getOpcode()) {
1678 case ARM::LDRD_POST:
1681 case ARM::LDRH_POST:
1683 case ARM::LDRSH_PRE:
1684 case ARM::LDRSH_POST:
1686 case ARM::LDRSB_PRE:
1687 case ARM::LDRSB_POST:
1690 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1691 return MCDisassembler::Fail;
1698 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1699 return MCDisassembler::Fail;
1702 Inst.addOperand(MCOperand::CreateReg(0));
1703 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1705 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1706 return MCDisassembler::Fail;
1707 Inst.addOperand(MCOperand::CreateImm(U));
1710 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1711 return MCDisassembler::Fail;
1716 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1717 uint64_t Address, const void *Decoder) {
1718 DecodeStatus S = MCDisassembler::Success;
1720 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1721 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1738 Inst.addOperand(MCOperand::CreateImm(mode));
1739 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1740 return MCDisassembler::Fail;
1745 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1747 uint64_t Address, const void *Decoder) {
1748 DecodeStatus S = MCDisassembler::Success;
1750 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1751 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1752 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1755 switch (Inst.getOpcode()) {
1757 Inst.setOpcode(ARM::RFEDA);
1759 case ARM::LDMDA_UPD:
1760 Inst.setOpcode(ARM::RFEDA_UPD);
1763 Inst.setOpcode(ARM::RFEDB);
1765 case ARM::LDMDB_UPD:
1766 Inst.setOpcode(ARM::RFEDB_UPD);
1769 Inst.setOpcode(ARM::RFEIA);
1771 case ARM::LDMIA_UPD:
1772 Inst.setOpcode(ARM::RFEIA_UPD);
1775 Inst.setOpcode(ARM::RFEIB);
1777 case ARM::LDMIB_UPD:
1778 Inst.setOpcode(ARM::RFEIB_UPD);
1781 Inst.setOpcode(ARM::SRSDA);
1783 case ARM::STMDA_UPD:
1784 Inst.setOpcode(ARM::SRSDA_UPD);
1787 Inst.setOpcode(ARM::SRSDB);
1789 case ARM::STMDB_UPD:
1790 Inst.setOpcode(ARM::SRSDB_UPD);
1793 Inst.setOpcode(ARM::SRSIA);
1795 case ARM::STMIA_UPD:
1796 Inst.setOpcode(ARM::SRSIA_UPD);
1799 Inst.setOpcode(ARM::SRSIB);
1801 case ARM::STMIB_UPD:
1802 Inst.setOpcode(ARM::SRSIB_UPD);
1805 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1808 // For stores (which become SRS's, the only operand is the mode.
1809 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1811 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1815 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1818 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1819 return MCDisassembler::Fail;
1820 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1821 return MCDisassembler::Fail; // Tied
1822 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1823 return MCDisassembler::Fail;
1824 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1825 return MCDisassembler::Fail;
1830 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1831 uint64_t Address, const void *Decoder) {
1832 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1833 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1834 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1835 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1837 DecodeStatus S = MCDisassembler::Success;
1839 // imod == '01' --> UNPREDICTABLE
1840 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1841 // return failure here. The '01' imod value is unprintable, so there's
1842 // nothing useful we could do even if we returned UNPREDICTABLE.
1844 if (imod == 1) return MCDisassembler::Fail;
1847 Inst.setOpcode(ARM::CPS3p);
1848 Inst.addOperand(MCOperand::CreateImm(imod));
1849 Inst.addOperand(MCOperand::CreateImm(iflags));
1850 Inst.addOperand(MCOperand::CreateImm(mode));
1851 } else if (imod && !M) {
1852 Inst.setOpcode(ARM::CPS2p);
1853 Inst.addOperand(MCOperand::CreateImm(imod));
1854 Inst.addOperand(MCOperand::CreateImm(iflags));
1855 if (mode) S = MCDisassembler::SoftFail;
1856 } else if (!imod && M) {
1857 Inst.setOpcode(ARM::CPS1p);
1858 Inst.addOperand(MCOperand::CreateImm(mode));
1859 if (iflags) S = MCDisassembler::SoftFail;
1861 // imod == '00' && M == '0' --> UNPREDICTABLE
1862 Inst.setOpcode(ARM::CPS1p);
1863 Inst.addOperand(MCOperand::CreateImm(mode));
1864 S = MCDisassembler::SoftFail;
1870 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1871 uint64_t Address, const void *Decoder) {
1872 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1873 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1874 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1875 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1877 DecodeStatus S = MCDisassembler::Success;
1879 // imod == '01' --> UNPREDICTABLE
1880 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1881 // return failure here. The '01' imod value is unprintable, so there's
1882 // nothing useful we could do even if we returned UNPREDICTABLE.
1884 if (imod == 1) return MCDisassembler::Fail;
1887 Inst.setOpcode(ARM::t2CPS3p);
1888 Inst.addOperand(MCOperand::CreateImm(imod));
1889 Inst.addOperand(MCOperand::CreateImm(iflags));
1890 Inst.addOperand(MCOperand::CreateImm(mode));
1891 } else if (imod && !M) {
1892 Inst.setOpcode(ARM::t2CPS2p);
1893 Inst.addOperand(MCOperand::CreateImm(imod));
1894 Inst.addOperand(MCOperand::CreateImm(iflags));
1895 if (mode) S = MCDisassembler::SoftFail;
1896 } else if (!imod && M) {
1897 Inst.setOpcode(ARM::t2CPS1p);
1898 Inst.addOperand(MCOperand::CreateImm(mode));
1899 if (iflags) S = MCDisassembler::SoftFail;
1901 // imod == '00' && M == '0' --> UNPREDICTABLE
1902 Inst.setOpcode(ARM::t2CPS1p);
1903 Inst.addOperand(MCOperand::CreateImm(mode));
1904 S = MCDisassembler::SoftFail;
1910 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1911 uint64_t Address, const void *Decoder) {
1912 DecodeStatus S = MCDisassembler::Success;
1914 unsigned Rd = fieldFromInstruction32(Insn, 8, 4);
1917 imm |= (fieldFromInstruction32(Insn, 0, 8) << 0);
1918 imm |= (fieldFromInstruction32(Insn, 12, 3) << 8);
1919 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1920 imm |= (fieldFromInstruction32(Insn, 26, 1) << 11);
1922 if (Inst.getOpcode() == ARM::t2MOVTi16)
1923 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1924 return MCDisassembler::Fail;
1925 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1926 return MCDisassembler::Fail;
1928 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1929 Inst.addOperand(MCOperand::CreateImm(imm));
1934 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1935 uint64_t Address, const void *Decoder) {
1936 DecodeStatus S = MCDisassembler::Success;
1938 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1939 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1942 imm |= (fieldFromInstruction32(Insn, 0, 12) << 0);
1943 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1945 if (Inst.getOpcode() == ARM::MOVTi16)
1946 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1947 return MCDisassembler::Fail;
1948 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1949 return MCDisassembler::Fail;
1951 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1952 Inst.addOperand(MCOperand::CreateImm(imm));
1954 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1955 return MCDisassembler::Fail;
1960 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
1961 uint64_t Address, const void *Decoder) {
1962 DecodeStatus S = MCDisassembler::Success;
1964 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1965 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1966 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1967 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1968 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1971 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1973 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1974 return MCDisassembler::Fail;
1975 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1976 return MCDisassembler::Fail;
1977 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1978 return MCDisassembler::Fail;
1979 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1980 return MCDisassembler::Fail;
1982 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1983 return MCDisassembler::Fail;
1988 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
1989 uint64_t Address, const void *Decoder) {
1990 DecodeStatus S = MCDisassembler::Success;
1992 unsigned add = fieldFromInstruction32(Val, 12, 1);
1993 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1994 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1996 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1997 return MCDisassembler::Fail;
1999 if (!add) imm *= -1;
2000 if (imm == 0 && !add) imm = INT32_MIN;
2001 Inst.addOperand(MCOperand::CreateImm(imm));
2003 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2008 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2009 uint64_t Address, const void *Decoder) {
2010 DecodeStatus S = MCDisassembler::Success;
2012 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2013 unsigned U = fieldFromInstruction32(Val, 8, 1);
2014 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2016 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2017 return MCDisassembler::Fail;
2020 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2022 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2027 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2028 uint64_t Address, const void *Decoder) {
2029 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2033 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2034 uint64_t Address, const void *Decoder) {
2035 DecodeStatus S = MCDisassembler::Success;
2037 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2038 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
2041 Inst.setOpcode(ARM::BLXi);
2042 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
2043 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2044 true, 4, Inst, Decoder))
2045 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2049 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2050 true, 4, Inst, Decoder))
2051 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2052 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2053 return MCDisassembler::Fail;
2059 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2060 uint64_t Address, const void *Decoder) {
2061 DecodeStatus S = MCDisassembler::Success;
2063 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
2064 unsigned align = fieldFromInstruction32(Val, 4, 2);
2066 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2067 return MCDisassembler::Fail;
2069 Inst.addOperand(MCOperand::CreateImm(0));
2071 Inst.addOperand(MCOperand::CreateImm(4 << align));
2076 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2077 uint64_t Address, const void *Decoder) {
2078 DecodeStatus S = MCDisassembler::Success;
2080 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2081 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2082 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
2083 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2084 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2085 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2087 // First output register
2088 switch (Inst.getOpcode()) {
2089 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2090 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2091 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2092 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2093 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2094 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2095 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2096 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2097 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2098 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2099 return MCDisassembler::Fail;
2104 case ARM::VLD2b16wb_fixed:
2105 case ARM::VLD2b16wb_register:
2106 case ARM::VLD2b32wb_fixed:
2107 case ARM::VLD2b32wb_register:
2108 case ARM::VLD2b8wb_fixed:
2109 case ARM::VLD2b8wb_register:
2110 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2111 return MCDisassembler::Fail;
2114 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2115 return MCDisassembler::Fail;
2118 // Second output register
2119 switch (Inst.getOpcode()) {
2123 case ARM::VLD3d8_UPD:
2124 case ARM::VLD3d16_UPD:
2125 case ARM::VLD3d32_UPD:
2129 case ARM::VLD4d8_UPD:
2130 case ARM::VLD4d16_UPD:
2131 case ARM::VLD4d32_UPD:
2132 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2133 return MCDisassembler::Fail;
2138 case ARM::VLD3q8_UPD:
2139 case ARM::VLD3q16_UPD:
2140 case ARM::VLD3q32_UPD:
2144 case ARM::VLD4q8_UPD:
2145 case ARM::VLD4q16_UPD:
2146 case ARM::VLD4q32_UPD:
2147 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2148 return MCDisassembler::Fail;
2153 // Third output register
2154 switch(Inst.getOpcode()) {
2158 case ARM::VLD3d8_UPD:
2159 case ARM::VLD3d16_UPD:
2160 case ARM::VLD3d32_UPD:
2164 case ARM::VLD4d8_UPD:
2165 case ARM::VLD4d16_UPD:
2166 case ARM::VLD4d32_UPD:
2167 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2168 return MCDisassembler::Fail;
2173 case ARM::VLD3q8_UPD:
2174 case ARM::VLD3q16_UPD:
2175 case ARM::VLD3q32_UPD:
2179 case ARM::VLD4q8_UPD:
2180 case ARM::VLD4q16_UPD:
2181 case ARM::VLD4q32_UPD:
2182 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2183 return MCDisassembler::Fail;
2189 // Fourth output register
2190 switch (Inst.getOpcode()) {
2194 case ARM::VLD4d8_UPD:
2195 case ARM::VLD4d16_UPD:
2196 case ARM::VLD4d32_UPD:
2197 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2198 return MCDisassembler::Fail;
2203 case ARM::VLD4q8_UPD:
2204 case ARM::VLD4q16_UPD:
2205 case ARM::VLD4q32_UPD:
2206 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2207 return MCDisassembler::Fail;
2213 // Writeback operand
2214 switch (Inst.getOpcode()) {
2215 case ARM::VLD1d8wb_fixed:
2216 case ARM::VLD1d16wb_fixed:
2217 case ARM::VLD1d32wb_fixed:
2218 case ARM::VLD1d64wb_fixed:
2219 case ARM::VLD1d8wb_register:
2220 case ARM::VLD1d16wb_register:
2221 case ARM::VLD1d32wb_register:
2222 case ARM::VLD1d64wb_register:
2223 case ARM::VLD1q8wb_fixed:
2224 case ARM::VLD1q16wb_fixed:
2225 case ARM::VLD1q32wb_fixed:
2226 case ARM::VLD1q64wb_fixed:
2227 case ARM::VLD1q8wb_register:
2228 case ARM::VLD1q16wb_register:
2229 case ARM::VLD1q32wb_register:
2230 case ARM::VLD1q64wb_register:
2231 case ARM::VLD1d8Twb_fixed:
2232 case ARM::VLD1d8Twb_register:
2233 case ARM::VLD1d16Twb_fixed:
2234 case ARM::VLD1d16Twb_register:
2235 case ARM::VLD1d32Twb_fixed:
2236 case ARM::VLD1d32Twb_register:
2237 case ARM::VLD1d64Twb_fixed:
2238 case ARM::VLD1d64Twb_register:
2239 case ARM::VLD1d8Qwb_fixed:
2240 case ARM::VLD1d8Qwb_register:
2241 case ARM::VLD1d16Qwb_fixed:
2242 case ARM::VLD1d16Qwb_register:
2243 case ARM::VLD1d32Qwb_fixed:
2244 case ARM::VLD1d32Qwb_register:
2245 case ARM::VLD1d64Qwb_fixed:
2246 case ARM::VLD1d64Qwb_register:
2247 case ARM::VLD2d8wb_fixed:
2248 case ARM::VLD2d16wb_fixed:
2249 case ARM::VLD2d32wb_fixed:
2250 case ARM::VLD2q8wb_fixed:
2251 case ARM::VLD2q16wb_fixed:
2252 case ARM::VLD2q32wb_fixed:
2253 case ARM::VLD2d8wb_register:
2254 case ARM::VLD2d16wb_register:
2255 case ARM::VLD2d32wb_register:
2256 case ARM::VLD2q8wb_register:
2257 case ARM::VLD2q16wb_register:
2258 case ARM::VLD2q32wb_register:
2259 case ARM::VLD2b8wb_fixed:
2260 case ARM::VLD2b16wb_fixed:
2261 case ARM::VLD2b32wb_fixed:
2262 case ARM::VLD2b8wb_register:
2263 case ARM::VLD2b16wb_register:
2264 case ARM::VLD2b32wb_register:
2265 Inst.addOperand(MCOperand::CreateImm(0));
2267 case ARM::VLD3d8_UPD:
2268 case ARM::VLD3d16_UPD:
2269 case ARM::VLD3d32_UPD:
2270 case ARM::VLD3q8_UPD:
2271 case ARM::VLD3q16_UPD:
2272 case ARM::VLD3q32_UPD:
2273 case ARM::VLD4d8_UPD:
2274 case ARM::VLD4d16_UPD:
2275 case ARM::VLD4d32_UPD:
2276 case ARM::VLD4q8_UPD:
2277 case ARM::VLD4q16_UPD:
2278 case ARM::VLD4q32_UPD:
2279 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2280 return MCDisassembler::Fail;
2286 // AddrMode6 Base (register+alignment)
2287 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2288 return MCDisassembler::Fail;
2290 // AddrMode6 Offset (register)
2291 switch (Inst.getOpcode()) {
2293 // The below have been updated to have explicit am6offset split
2294 // between fixed and register offset. For those instructions not
2295 // yet updated, we need to add an additional reg0 operand for the
2298 // The fixed offset encodes as Rm == 0xd, so we check for that.
2300 Inst.addOperand(MCOperand::CreateReg(0));
2303 // Fall through to handle the register offset variant.
2304 case ARM::VLD1d8wb_fixed:
2305 case ARM::VLD1d16wb_fixed:
2306 case ARM::VLD1d32wb_fixed:
2307 case ARM::VLD1d64wb_fixed:
2308 case ARM::VLD1d8Twb_fixed:
2309 case ARM::VLD1d16Twb_fixed:
2310 case ARM::VLD1d32Twb_fixed:
2311 case ARM::VLD1d64Twb_fixed:
2312 case ARM::VLD1d8Qwb_fixed:
2313 case ARM::VLD1d16Qwb_fixed:
2314 case ARM::VLD1d32Qwb_fixed:
2315 case ARM::VLD1d64Qwb_fixed:
2316 case ARM::VLD1d8wb_register:
2317 case ARM::VLD1d16wb_register:
2318 case ARM::VLD1d32wb_register:
2319 case ARM::VLD1d64wb_register:
2320 case ARM::VLD1q8wb_fixed:
2321 case ARM::VLD1q16wb_fixed:
2322 case ARM::VLD1q32wb_fixed:
2323 case ARM::VLD1q64wb_fixed:
2324 case ARM::VLD1q8wb_register:
2325 case ARM::VLD1q16wb_register:
2326 case ARM::VLD1q32wb_register:
2327 case ARM::VLD1q64wb_register:
2328 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2329 // variant encodes Rm == 0xf. Anything else is a register offset post-
2330 // increment and we need to add the register operand to the instruction.
2331 if (Rm != 0xD && Rm != 0xF &&
2332 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2333 return MCDisassembler::Fail;
2335 case ARM::VLD2d8wb_fixed:
2336 case ARM::VLD2d16wb_fixed:
2337 case ARM::VLD2d32wb_fixed:
2338 case ARM::VLD2b8wb_fixed:
2339 case ARM::VLD2b16wb_fixed:
2340 case ARM::VLD2b32wb_fixed:
2341 case ARM::VLD2q8wb_fixed:
2342 case ARM::VLD2q16wb_fixed:
2343 case ARM::VLD2q32wb_fixed:
2350 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2351 uint64_t Address, const void *Decoder) {
2352 DecodeStatus S = MCDisassembler::Success;
2354 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2355 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2356 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
2357 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2358 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2359 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2361 // Writeback Operand
2362 switch (Inst.getOpcode()) {
2363 case ARM::VST1d8wb_fixed:
2364 case ARM::VST1d16wb_fixed:
2365 case ARM::VST1d32wb_fixed:
2366 case ARM::VST1d64wb_fixed:
2367 case ARM::VST1d8wb_register:
2368 case ARM::VST1d16wb_register:
2369 case ARM::VST1d32wb_register:
2370 case ARM::VST1d64wb_register:
2371 case ARM::VST1q8wb_fixed:
2372 case ARM::VST1q16wb_fixed:
2373 case ARM::VST1q32wb_fixed:
2374 case ARM::VST1q64wb_fixed:
2375 case ARM::VST1q8wb_register:
2376 case ARM::VST1q16wb_register:
2377 case ARM::VST1q32wb_register:
2378 case ARM::VST1q64wb_register:
2379 case ARM::VST1d8Twb_fixed:
2380 case ARM::VST1d16Twb_fixed:
2381 case ARM::VST1d32Twb_fixed:
2382 case ARM::VST1d64Twb_fixed:
2383 case ARM::VST1d8Twb_register:
2384 case ARM::VST1d16Twb_register:
2385 case ARM::VST1d32Twb_register:
2386 case ARM::VST1d64Twb_register:
2387 case ARM::VST1d8Qwb_fixed:
2388 case ARM::VST1d16Qwb_fixed:
2389 case ARM::VST1d32Qwb_fixed:
2390 case ARM::VST1d64Qwb_fixed:
2391 case ARM::VST1d8Qwb_register:
2392 case ARM::VST1d16Qwb_register:
2393 case ARM::VST1d32Qwb_register:
2394 case ARM::VST1d64Qwb_register:
2395 case ARM::VST2d8wb_fixed:
2396 case ARM::VST2d16wb_fixed:
2397 case ARM::VST2d32wb_fixed:
2398 case ARM::VST2d8wb_register:
2399 case ARM::VST2d16wb_register:
2400 case ARM::VST2d32wb_register:
2401 case ARM::VST2q8wb_fixed:
2402 case ARM::VST2q16wb_fixed:
2403 case ARM::VST2q32wb_fixed:
2404 case ARM::VST2q8wb_register:
2405 case ARM::VST2q16wb_register:
2406 case ARM::VST2q32wb_register:
2407 case ARM::VST2b8wb_fixed:
2408 case ARM::VST2b16wb_fixed:
2409 case ARM::VST2b32wb_fixed:
2410 case ARM::VST2b8wb_register:
2411 case ARM::VST2b16wb_register:
2412 case ARM::VST2b32wb_register:
2413 Inst.addOperand(MCOperand::CreateImm(0));
2415 case ARM::VST3d8_UPD:
2416 case ARM::VST3d16_UPD:
2417 case ARM::VST3d32_UPD:
2418 case ARM::VST3q8_UPD:
2419 case ARM::VST3q16_UPD:
2420 case ARM::VST3q32_UPD:
2421 case ARM::VST4d8_UPD:
2422 case ARM::VST4d16_UPD:
2423 case ARM::VST4d32_UPD:
2424 case ARM::VST4q8_UPD:
2425 case ARM::VST4q16_UPD:
2426 case ARM::VST4q32_UPD:
2427 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2428 return MCDisassembler::Fail;
2434 // AddrMode6 Base (register+alignment)
2435 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2436 return MCDisassembler::Fail;
2438 // AddrMode6 Offset (register)
2439 switch (Inst.getOpcode()) {
2442 Inst.addOperand(MCOperand::CreateReg(0));
2443 else if (Rm != 0xF) {
2444 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2445 return MCDisassembler::Fail;
2448 case ARM::VST1d8wb_fixed:
2449 case ARM::VST1d16wb_fixed:
2450 case ARM::VST1d32wb_fixed:
2451 case ARM::VST1d64wb_fixed:
2452 case ARM::VST1q8wb_fixed:
2453 case ARM::VST1q16wb_fixed:
2454 case ARM::VST1q32wb_fixed:
2455 case ARM::VST1q64wb_fixed:
2456 case ARM::VST1d8Twb_fixed:
2457 case ARM::VST1d16Twb_fixed:
2458 case ARM::VST1d32Twb_fixed:
2459 case ARM::VST1d64Twb_fixed:
2460 case ARM::VST1d8Qwb_fixed:
2461 case ARM::VST1d16Qwb_fixed:
2462 case ARM::VST1d32Qwb_fixed:
2463 case ARM::VST1d64Qwb_fixed:
2464 case ARM::VST2d8wb_fixed:
2465 case ARM::VST2d16wb_fixed:
2466 case ARM::VST2d32wb_fixed:
2467 case ARM::VST2q8wb_fixed:
2468 case ARM::VST2q16wb_fixed:
2469 case ARM::VST2q32wb_fixed:
2470 case ARM::VST2b8wb_fixed:
2471 case ARM::VST2b16wb_fixed:
2472 case ARM::VST2b32wb_fixed:
2477 // First input register
2478 switch (Inst.getOpcode()) {
2483 case ARM::VST1q16wb_fixed:
2484 case ARM::VST1q16wb_register:
2485 case ARM::VST1q32wb_fixed:
2486 case ARM::VST1q32wb_register:
2487 case ARM::VST1q64wb_fixed:
2488 case ARM::VST1q64wb_register:
2489 case ARM::VST1q8wb_fixed:
2490 case ARM::VST1q8wb_register:
2494 case ARM::VST2d16wb_fixed:
2495 case ARM::VST2d16wb_register:
2496 case ARM::VST2d32wb_fixed:
2497 case ARM::VST2d32wb_register:
2498 case ARM::VST2d8wb_fixed:
2499 case ARM::VST2d8wb_register:
2500 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2501 return MCDisassembler::Fail;
2506 case ARM::VST2b16wb_fixed:
2507 case ARM::VST2b16wb_register:
2508 case ARM::VST2b32wb_fixed:
2509 case ARM::VST2b32wb_register:
2510 case ARM::VST2b8wb_fixed:
2511 case ARM::VST2b8wb_register:
2512 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2513 return MCDisassembler::Fail;
2516 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2517 return MCDisassembler::Fail;
2520 // Second input register
2521 switch (Inst.getOpcode()) {
2525 case ARM::VST3d8_UPD:
2526 case ARM::VST3d16_UPD:
2527 case ARM::VST3d32_UPD:
2531 case ARM::VST4d8_UPD:
2532 case ARM::VST4d16_UPD:
2533 case ARM::VST4d32_UPD:
2534 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2535 return MCDisassembler::Fail;
2540 case ARM::VST3q8_UPD:
2541 case ARM::VST3q16_UPD:
2542 case ARM::VST3q32_UPD:
2546 case ARM::VST4q8_UPD:
2547 case ARM::VST4q16_UPD:
2548 case ARM::VST4q32_UPD:
2549 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2550 return MCDisassembler::Fail;
2556 // Third input register
2557 switch (Inst.getOpcode()) {
2561 case ARM::VST3d8_UPD:
2562 case ARM::VST3d16_UPD:
2563 case ARM::VST3d32_UPD:
2567 case ARM::VST4d8_UPD:
2568 case ARM::VST4d16_UPD:
2569 case ARM::VST4d32_UPD:
2570 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2571 return MCDisassembler::Fail;
2576 case ARM::VST3q8_UPD:
2577 case ARM::VST3q16_UPD:
2578 case ARM::VST3q32_UPD:
2582 case ARM::VST4q8_UPD:
2583 case ARM::VST4q16_UPD:
2584 case ARM::VST4q32_UPD:
2585 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2586 return MCDisassembler::Fail;
2592 // Fourth input register
2593 switch (Inst.getOpcode()) {
2597 case ARM::VST4d8_UPD:
2598 case ARM::VST4d16_UPD:
2599 case ARM::VST4d32_UPD:
2600 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2601 return MCDisassembler::Fail;
2606 case ARM::VST4q8_UPD:
2607 case ARM::VST4q16_UPD:
2608 case ARM::VST4q32_UPD:
2609 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2610 return MCDisassembler::Fail;
2619 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2620 uint64_t Address, const void *Decoder) {
2621 DecodeStatus S = MCDisassembler::Success;
2623 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2624 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2625 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2626 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2627 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2628 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2630 align *= (1 << size);
2632 switch (Inst.getOpcode()) {
2633 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2634 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2635 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2636 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2637 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2638 return MCDisassembler::Fail;
2641 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2642 return MCDisassembler::Fail;
2646 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2647 return MCDisassembler::Fail;
2650 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2651 return MCDisassembler::Fail;
2652 Inst.addOperand(MCOperand::CreateImm(align));
2654 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2655 // variant encodes Rm == 0xf. Anything else is a register offset post-
2656 // increment and we need to add the register operand to the instruction.
2657 if (Rm != 0xD && Rm != 0xF &&
2658 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2659 return MCDisassembler::Fail;
2664 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2665 uint64_t Address, const void *Decoder) {
2666 DecodeStatus S = MCDisassembler::Success;
2668 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2669 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2670 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2671 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2672 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2673 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2674 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2677 switch (Inst.getOpcode()) {
2678 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2679 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2680 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2681 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2682 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2683 return MCDisassembler::Fail;
2685 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2686 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2687 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2688 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2689 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2690 return MCDisassembler::Fail;
2693 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2694 return MCDisassembler::Fail;
2699 Inst.addOperand(MCOperand::CreateImm(0));
2701 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2702 return MCDisassembler::Fail;
2703 Inst.addOperand(MCOperand::CreateImm(align));
2706 Inst.addOperand(MCOperand::CreateReg(0));
2707 else if (Rm != 0xF) {
2708 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2709 return MCDisassembler::Fail;
2712 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2713 return MCDisassembler::Fail;
2718 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2719 uint64_t Address, const void *Decoder) {
2720 DecodeStatus S = MCDisassembler::Success;
2722 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2723 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2724 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2725 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2726 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2728 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2729 return MCDisassembler::Fail;
2730 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2731 return MCDisassembler::Fail;
2732 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2733 return MCDisassembler::Fail;
2735 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2736 return MCDisassembler::Fail;
2739 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2740 return MCDisassembler::Fail;
2741 Inst.addOperand(MCOperand::CreateImm(0));
2744 Inst.addOperand(MCOperand::CreateReg(0));
2745 else if (Rm != 0xF) {
2746 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2747 return MCDisassembler::Fail;
2753 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2754 uint64_t Address, const void *Decoder) {
2755 DecodeStatus S = MCDisassembler::Success;
2757 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2758 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2759 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2760 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2761 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2762 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2763 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2778 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2779 return MCDisassembler::Fail;
2780 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2781 return MCDisassembler::Fail;
2782 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2783 return MCDisassembler::Fail;
2784 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2785 return MCDisassembler::Fail;
2787 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2788 return MCDisassembler::Fail;
2791 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2792 return MCDisassembler::Fail;
2793 Inst.addOperand(MCOperand::CreateImm(align));
2796 Inst.addOperand(MCOperand::CreateReg(0));
2797 else if (Rm != 0xF) {
2798 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2799 return MCDisassembler::Fail;
2806 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2807 uint64_t Address, const void *Decoder) {
2808 DecodeStatus S = MCDisassembler::Success;
2810 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2811 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2812 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2813 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2814 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2815 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2816 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2817 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2820 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2821 return MCDisassembler::Fail;
2823 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2824 return MCDisassembler::Fail;
2827 Inst.addOperand(MCOperand::CreateImm(imm));
2829 switch (Inst.getOpcode()) {
2830 case ARM::VORRiv4i16:
2831 case ARM::VORRiv2i32:
2832 case ARM::VBICiv4i16:
2833 case ARM::VBICiv2i32:
2834 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2835 return MCDisassembler::Fail;
2837 case ARM::VORRiv8i16:
2838 case ARM::VORRiv4i32:
2839 case ARM::VBICiv8i16:
2840 case ARM::VBICiv4i32:
2841 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2842 return MCDisassembler::Fail;
2851 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2852 uint64_t Address, const void *Decoder) {
2853 DecodeStatus S = MCDisassembler::Success;
2855 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2856 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2857 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2858 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2859 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2861 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2862 return MCDisassembler::Fail;
2863 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2864 return MCDisassembler::Fail;
2865 Inst.addOperand(MCOperand::CreateImm(8 << size));
2870 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2871 uint64_t Address, const void *Decoder) {
2872 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2873 return MCDisassembler::Success;
2876 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2877 uint64_t Address, const void *Decoder) {
2878 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2879 return MCDisassembler::Success;
2882 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2883 uint64_t Address, const void *Decoder) {
2884 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2885 return MCDisassembler::Success;
2888 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2889 uint64_t Address, const void *Decoder) {
2890 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2891 return MCDisassembler::Success;
2894 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2895 uint64_t Address, const void *Decoder) {
2896 DecodeStatus S = MCDisassembler::Success;
2898 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2899 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2900 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2901 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2902 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2903 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2904 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2906 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2907 return MCDisassembler::Fail;
2909 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2910 return MCDisassembler::Fail; // Writeback
2913 switch (Inst.getOpcode()) {
2916 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
2917 return MCDisassembler::Fail;
2920 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
2921 return MCDisassembler::Fail;
2924 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2925 return MCDisassembler::Fail;
2930 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
2931 uint64_t Address, const void *Decoder) {
2932 DecodeStatus S = MCDisassembler::Success;
2934 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2935 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2937 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2938 return MCDisassembler::Fail;
2940 switch(Inst.getOpcode()) {
2942 return MCDisassembler::Fail;
2944 break; // tADR does not explicitly represent the PC as an operand.
2946 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2950 Inst.addOperand(MCOperand::CreateImm(imm));
2954 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
2955 uint64_t Address, const void *Decoder) {
2956 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2957 return MCDisassembler::Success;
2960 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
2961 uint64_t Address, const void *Decoder) {
2962 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2963 return MCDisassembler::Success;
2966 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
2967 uint64_t Address, const void *Decoder) {
2968 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2969 return MCDisassembler::Success;
2972 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
2973 uint64_t Address, const void *Decoder) {
2974 DecodeStatus S = MCDisassembler::Success;
2976 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2977 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2979 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2980 return MCDisassembler::Fail;
2981 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2982 return MCDisassembler::Fail;
2987 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
2988 uint64_t Address, const void *Decoder) {
2989 DecodeStatus S = MCDisassembler::Success;
2991 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2992 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2994 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2995 return MCDisassembler::Fail;
2996 Inst.addOperand(MCOperand::CreateImm(imm));
3001 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3002 uint64_t Address, const void *Decoder) {
3003 unsigned imm = Val << 2;
3005 Inst.addOperand(MCOperand::CreateImm(imm));
3006 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3008 return MCDisassembler::Success;
3011 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3012 uint64_t Address, const void *Decoder) {
3013 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3014 Inst.addOperand(MCOperand::CreateImm(Val));
3016 return MCDisassembler::Success;
3019 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3020 uint64_t Address, const void *Decoder) {
3021 DecodeStatus S = MCDisassembler::Success;
3023 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
3024 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
3025 unsigned imm = fieldFromInstruction32(Val, 0, 2);
3027 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3028 return MCDisassembler::Fail;
3029 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3030 return MCDisassembler::Fail;
3031 Inst.addOperand(MCOperand::CreateImm(imm));
3036 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3037 uint64_t Address, const void *Decoder) {
3038 DecodeStatus S = MCDisassembler::Success;
3040 switch (Inst.getOpcode()) {
3046 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3047 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3048 return MCDisassembler::Fail;
3052 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3054 switch (Inst.getOpcode()) {
3056 Inst.setOpcode(ARM::t2LDRBpci);
3059 Inst.setOpcode(ARM::t2LDRHpci);
3062 Inst.setOpcode(ARM::t2LDRSHpci);
3065 Inst.setOpcode(ARM::t2LDRSBpci);
3068 Inst.setOpcode(ARM::t2PLDi12);
3069 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3072 return MCDisassembler::Fail;
3075 int imm = fieldFromInstruction32(Insn, 0, 12);
3076 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
3077 Inst.addOperand(MCOperand::CreateImm(imm));
3082 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
3083 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
3084 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
3085 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3086 return MCDisassembler::Fail;
3091 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3092 uint64_t Address, const void *Decoder) {
3093 int imm = Val & 0xFF;
3094 if (!(Val & 0x100)) imm *= -1;
3095 Inst.addOperand(MCOperand::CreateImm(imm << 2));
3097 return MCDisassembler::Success;
3100 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3101 uint64_t Address, const void *Decoder) {
3102 DecodeStatus S = MCDisassembler::Success;
3104 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
3105 unsigned imm = fieldFromInstruction32(Val, 0, 9);
3107 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3108 return MCDisassembler::Fail;
3109 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3110 return MCDisassembler::Fail;
3115 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3116 uint64_t Address, const void *Decoder) {
3117 DecodeStatus S = MCDisassembler::Success;
3119 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
3120 unsigned imm = fieldFromInstruction32(Val, 0, 8);
3122 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3123 return MCDisassembler::Fail;
3125 Inst.addOperand(MCOperand::CreateImm(imm));
3130 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3131 uint64_t Address, const void *Decoder) {
3132 int imm = Val & 0xFF;
3135 else if (!(Val & 0x100))
3137 Inst.addOperand(MCOperand::CreateImm(imm));
3139 return MCDisassembler::Success;
3143 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3144 uint64_t Address, const void *Decoder) {
3145 DecodeStatus S = MCDisassembler::Success;
3147 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
3148 unsigned imm = fieldFromInstruction32(Val, 0, 9);
3150 // Some instructions always use an additive offset.
3151 switch (Inst.getOpcode()) {
3166 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3167 return MCDisassembler::Fail;
3168 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3169 return MCDisassembler::Fail;
3174 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3175 uint64_t Address, const void *Decoder) {
3176 DecodeStatus S = MCDisassembler::Success;
3178 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3179 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3180 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3181 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
3183 unsigned load = fieldFromInstruction32(Insn, 20, 1);
3186 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3187 return MCDisassembler::Fail;
3190 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3191 return MCDisassembler::Fail;
3194 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3195 return MCDisassembler::Fail;
3198 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3199 return MCDisassembler::Fail;
3204 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3205 uint64_t Address, const void *Decoder) {
3206 DecodeStatus S = MCDisassembler::Success;
3208 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
3209 unsigned imm = fieldFromInstruction32(Val, 0, 12);
3211 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3212 return MCDisassembler::Fail;
3213 Inst.addOperand(MCOperand::CreateImm(imm));
3219 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3220 uint64_t Address, const void *Decoder) {
3221 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
3223 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3224 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3225 Inst.addOperand(MCOperand::CreateImm(imm));
3227 return MCDisassembler::Success;
3230 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3231 uint64_t Address, const void *Decoder) {
3232 DecodeStatus S = MCDisassembler::Success;
3234 if (Inst.getOpcode() == ARM::tADDrSP) {
3235 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
3236 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
3238 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3239 return MCDisassembler::Fail;
3240 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3241 return MCDisassembler::Fail;
3242 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3243 } else if (Inst.getOpcode() == ARM::tADDspr) {
3244 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
3246 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3247 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3248 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3249 return MCDisassembler::Fail;
3255 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3256 uint64_t Address, const void *Decoder) {
3257 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
3258 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
3260 Inst.addOperand(MCOperand::CreateImm(imod));
3261 Inst.addOperand(MCOperand::CreateImm(flags));
3263 return MCDisassembler::Success;
3266 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3267 uint64_t Address, const void *Decoder) {
3268 DecodeStatus S = MCDisassembler::Success;
3269 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3270 unsigned add = fieldFromInstruction32(Insn, 4, 1);
3272 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3273 return MCDisassembler::Fail;
3274 Inst.addOperand(MCOperand::CreateImm(add));
3279 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3280 uint64_t Address, const void *Decoder) {
3281 if (!tryAddingSymbolicOperand(Address,
3282 (Address & ~2u) + SignExtend32<22>(Val << 1) + 4,
3283 true, 4, Inst, Decoder))
3284 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3285 return MCDisassembler::Success;
3288 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3289 uint64_t Address, const void *Decoder) {
3290 if (Val == 0xA || Val == 0xB)
3291 return MCDisassembler::Fail;
3293 Inst.addOperand(MCOperand::CreateImm(Val));
3294 return MCDisassembler::Success;
3298 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3299 uint64_t Address, const void *Decoder) {
3300 DecodeStatus S = MCDisassembler::Success;
3302 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3303 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3305 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3306 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3307 return MCDisassembler::Fail;
3308 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3309 return MCDisassembler::Fail;
3314 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3315 uint64_t Address, const void *Decoder) {
3316 DecodeStatus S = MCDisassembler::Success;
3318 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
3319 if (pred == 0xE || pred == 0xF) {
3320 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
3323 return MCDisassembler::Fail;
3325 Inst.setOpcode(ARM::t2DSB);
3328 Inst.setOpcode(ARM::t2DMB);
3331 Inst.setOpcode(ARM::t2ISB);
3335 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
3336 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3339 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
3340 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
3341 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
3342 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
3343 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
3345 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3346 return MCDisassembler::Fail;
3347 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3348 return MCDisassembler::Fail;
3353 // Decode a shifted immediate operand. These basically consist
3354 // of an 8-bit value, and a 4-bit directive that specifies either
3355 // a splat operation or a rotation.
3356 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3357 uint64_t Address, const void *Decoder) {
3358 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
3360 unsigned byte = fieldFromInstruction32(Val, 8, 2);
3361 unsigned imm = fieldFromInstruction32(Val, 0, 8);
3364 Inst.addOperand(MCOperand::CreateImm(imm));
3367 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3370 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3373 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3378 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
3379 unsigned rot = fieldFromInstruction32(Val, 7, 5);
3380 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3381 Inst.addOperand(MCOperand::CreateImm(imm));
3384 return MCDisassembler::Success;
3388 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3389 uint64_t Address, const void *Decoder){
3390 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3391 return MCDisassembler::Success;
3394 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3395 uint64_t Address, const void *Decoder){
3396 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<22>(Val<<1) + 4,
3397 true, 4, Inst, Decoder))
3398 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3399 return MCDisassembler::Success;
3402 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3403 uint64_t Address, const void *Decoder) {
3406 return MCDisassembler::Fail;
3418 Inst.addOperand(MCOperand::CreateImm(Val));
3419 return MCDisassembler::Success;
3422 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3423 uint64_t Address, const void *Decoder) {
3424 if (!Val) return MCDisassembler::Fail;
3425 Inst.addOperand(MCOperand::CreateImm(Val));
3426 return MCDisassembler::Success;
3429 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3430 uint64_t Address, const void *Decoder) {
3431 DecodeStatus S = MCDisassembler::Success;
3433 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3434 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3435 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3437 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3439 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3440 return MCDisassembler::Fail;
3441 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3442 return MCDisassembler::Fail;
3443 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3444 return MCDisassembler::Fail;
3445 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3446 return MCDisassembler::Fail;
3452 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3453 uint64_t Address, const void *Decoder){
3454 DecodeStatus S = MCDisassembler::Success;
3456 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3457 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3458 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3459 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3461 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3462 return MCDisassembler::Fail;
3464 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3465 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3467 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3468 return MCDisassembler::Fail;
3469 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3470 return MCDisassembler::Fail;
3471 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3472 return MCDisassembler::Fail;
3473 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3474 return MCDisassembler::Fail;
3479 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3480 uint64_t Address, const void *Decoder) {
3481 DecodeStatus S = MCDisassembler::Success;
3483 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3484 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3485 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3486 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3487 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3488 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3490 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3492 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3493 return MCDisassembler::Fail;
3494 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3495 return MCDisassembler::Fail;
3496 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3497 return MCDisassembler::Fail;
3498 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3499 return MCDisassembler::Fail;
3504 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3505 uint64_t Address, const void *Decoder) {
3506 DecodeStatus S = MCDisassembler::Success;
3508 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3509 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3510 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3511 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3512 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3513 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3514 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3516 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3517 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3519 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3520 return MCDisassembler::Fail;
3521 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3522 return MCDisassembler::Fail;
3523 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3524 return MCDisassembler::Fail;
3525 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3526 return MCDisassembler::Fail;
3532 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3533 uint64_t Address, const void *Decoder) {
3534 DecodeStatus S = MCDisassembler::Success;
3536 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3537 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3538 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3539 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3540 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3541 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3543 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3545 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3546 return MCDisassembler::Fail;
3547 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3548 return MCDisassembler::Fail;
3549 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3550 return MCDisassembler::Fail;
3551 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3552 return MCDisassembler::Fail;
3557 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3558 uint64_t Address, const void *Decoder) {
3559 DecodeStatus S = MCDisassembler::Success;
3561 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3562 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3563 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3564 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3565 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3566 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3568 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3570 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3571 return MCDisassembler::Fail;
3572 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3573 return MCDisassembler::Fail;
3574 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3575 return MCDisassembler::Fail;
3576 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3577 return MCDisassembler::Fail;
3582 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3583 uint64_t Address, const void *Decoder) {
3584 DecodeStatus S = MCDisassembler::Success;
3586 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3587 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3588 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3589 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3590 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3596 return MCDisassembler::Fail;
3598 if (fieldFromInstruction32(Insn, 4, 1))
3599 return MCDisassembler::Fail; // UNDEFINED
3600 index = fieldFromInstruction32(Insn, 5, 3);
3603 if (fieldFromInstruction32(Insn, 5, 1))
3604 return MCDisassembler::Fail; // UNDEFINED
3605 index = fieldFromInstruction32(Insn, 6, 2);
3606 if (fieldFromInstruction32(Insn, 4, 1))
3610 if (fieldFromInstruction32(Insn, 6, 1))
3611 return MCDisassembler::Fail; // UNDEFINED
3612 index = fieldFromInstruction32(Insn, 7, 1);
3613 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3617 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3618 return MCDisassembler::Fail;
3619 if (Rm != 0xF) { // Writeback
3620 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3621 return MCDisassembler::Fail;
3623 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3624 return MCDisassembler::Fail;
3625 Inst.addOperand(MCOperand::CreateImm(align));
3628 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3629 return MCDisassembler::Fail;
3631 Inst.addOperand(MCOperand::CreateReg(0));
3634 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3635 return MCDisassembler::Fail;
3636 Inst.addOperand(MCOperand::CreateImm(index));
3641 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3642 uint64_t Address, const void *Decoder) {
3643 DecodeStatus S = MCDisassembler::Success;
3645 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3646 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3647 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3648 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3649 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3655 return MCDisassembler::Fail;
3657 if (fieldFromInstruction32(Insn, 4, 1))
3658 return MCDisassembler::Fail; // UNDEFINED
3659 index = fieldFromInstruction32(Insn, 5, 3);
3662 if (fieldFromInstruction32(Insn, 5, 1))
3663 return MCDisassembler::Fail; // UNDEFINED
3664 index = fieldFromInstruction32(Insn, 6, 2);
3665 if (fieldFromInstruction32(Insn, 4, 1))
3669 if (fieldFromInstruction32(Insn, 6, 1))
3670 return MCDisassembler::Fail; // UNDEFINED
3671 index = fieldFromInstruction32(Insn, 7, 1);
3672 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3676 if (Rm != 0xF) { // Writeback
3677 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3678 return MCDisassembler::Fail;
3680 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3681 return MCDisassembler::Fail;
3682 Inst.addOperand(MCOperand::CreateImm(align));
3685 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3686 return MCDisassembler::Fail;
3688 Inst.addOperand(MCOperand::CreateReg(0));
3691 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3692 return MCDisassembler::Fail;
3693 Inst.addOperand(MCOperand::CreateImm(index));
3699 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3700 uint64_t Address, const void *Decoder) {
3701 DecodeStatus S = MCDisassembler::Success;
3703 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3704 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3705 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3706 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3707 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3714 return MCDisassembler::Fail;
3716 index = fieldFromInstruction32(Insn, 5, 3);
3717 if (fieldFromInstruction32(Insn, 4, 1))
3721 index = fieldFromInstruction32(Insn, 6, 2);
3722 if (fieldFromInstruction32(Insn, 4, 1))
3724 if (fieldFromInstruction32(Insn, 5, 1))
3728 if (fieldFromInstruction32(Insn, 5, 1))
3729 return MCDisassembler::Fail; // UNDEFINED
3730 index = fieldFromInstruction32(Insn, 7, 1);
3731 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3733 if (fieldFromInstruction32(Insn, 6, 1))
3738 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3739 return MCDisassembler::Fail;
3740 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3741 return MCDisassembler::Fail;
3742 if (Rm != 0xF) { // Writeback
3743 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3744 return MCDisassembler::Fail;
3746 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3747 return MCDisassembler::Fail;
3748 Inst.addOperand(MCOperand::CreateImm(align));
3751 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3752 return MCDisassembler::Fail;
3754 Inst.addOperand(MCOperand::CreateReg(0));
3757 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3758 return MCDisassembler::Fail;
3759 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3760 return MCDisassembler::Fail;
3761 Inst.addOperand(MCOperand::CreateImm(index));
3766 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3767 uint64_t Address, const void *Decoder) {
3768 DecodeStatus S = MCDisassembler::Success;
3770 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3771 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3772 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3773 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3774 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3781 return MCDisassembler::Fail;
3783 index = fieldFromInstruction32(Insn, 5, 3);
3784 if (fieldFromInstruction32(Insn, 4, 1))
3788 index = fieldFromInstruction32(Insn, 6, 2);
3789 if (fieldFromInstruction32(Insn, 4, 1))
3791 if (fieldFromInstruction32(Insn, 5, 1))
3795 if (fieldFromInstruction32(Insn, 5, 1))
3796 return MCDisassembler::Fail; // UNDEFINED
3797 index = fieldFromInstruction32(Insn, 7, 1);
3798 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3800 if (fieldFromInstruction32(Insn, 6, 1))
3805 if (Rm != 0xF) { // Writeback
3806 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3807 return MCDisassembler::Fail;
3809 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3810 return MCDisassembler::Fail;
3811 Inst.addOperand(MCOperand::CreateImm(align));
3814 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3815 return MCDisassembler::Fail;
3817 Inst.addOperand(MCOperand::CreateReg(0));
3820 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3821 return MCDisassembler::Fail;
3822 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3823 return MCDisassembler::Fail;
3824 Inst.addOperand(MCOperand::CreateImm(index));
3830 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3831 uint64_t Address, const void *Decoder) {
3832 DecodeStatus S = MCDisassembler::Success;
3834 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3835 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3836 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3837 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3838 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3845 return MCDisassembler::Fail;
3847 if (fieldFromInstruction32(Insn, 4, 1))
3848 return MCDisassembler::Fail; // UNDEFINED
3849 index = fieldFromInstruction32(Insn, 5, 3);
3852 if (fieldFromInstruction32(Insn, 4, 1))
3853 return MCDisassembler::Fail; // UNDEFINED
3854 index = fieldFromInstruction32(Insn, 6, 2);
3855 if (fieldFromInstruction32(Insn, 5, 1))
3859 if (fieldFromInstruction32(Insn, 4, 2))
3860 return MCDisassembler::Fail; // UNDEFINED
3861 index = fieldFromInstruction32(Insn, 7, 1);
3862 if (fieldFromInstruction32(Insn, 6, 1))
3867 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3868 return MCDisassembler::Fail;
3869 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3870 return MCDisassembler::Fail;
3871 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3872 return MCDisassembler::Fail;
3874 if (Rm != 0xF) { // Writeback
3875 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3876 return MCDisassembler::Fail;
3878 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3879 return MCDisassembler::Fail;
3880 Inst.addOperand(MCOperand::CreateImm(align));
3883 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3884 return MCDisassembler::Fail;
3886 Inst.addOperand(MCOperand::CreateReg(0));
3889 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3890 return MCDisassembler::Fail;
3891 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3892 return MCDisassembler::Fail;
3893 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3894 return MCDisassembler::Fail;
3895 Inst.addOperand(MCOperand::CreateImm(index));
3900 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
3901 uint64_t Address, const void *Decoder) {
3902 DecodeStatus S = MCDisassembler::Success;
3904 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3905 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3906 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3907 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3908 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3915 return MCDisassembler::Fail;
3917 if (fieldFromInstruction32(Insn, 4, 1))
3918 return MCDisassembler::Fail; // UNDEFINED
3919 index = fieldFromInstruction32(Insn, 5, 3);
3922 if (fieldFromInstruction32(Insn, 4, 1))
3923 return MCDisassembler::Fail; // UNDEFINED
3924 index = fieldFromInstruction32(Insn, 6, 2);
3925 if (fieldFromInstruction32(Insn, 5, 1))
3929 if (fieldFromInstruction32(Insn, 4, 2))
3930 return MCDisassembler::Fail; // UNDEFINED
3931 index = fieldFromInstruction32(Insn, 7, 1);
3932 if (fieldFromInstruction32(Insn, 6, 1))
3937 if (Rm != 0xF) { // Writeback
3938 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3939 return MCDisassembler::Fail;
3941 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3942 return MCDisassembler::Fail;
3943 Inst.addOperand(MCOperand::CreateImm(align));
3946 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3947 return MCDisassembler::Fail;
3949 Inst.addOperand(MCOperand::CreateReg(0));
3952 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3953 return MCDisassembler::Fail;
3954 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3955 return MCDisassembler::Fail;
3956 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3957 return MCDisassembler::Fail;
3958 Inst.addOperand(MCOperand::CreateImm(index));
3964 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
3965 uint64_t Address, const void *Decoder) {
3966 DecodeStatus S = MCDisassembler::Success;
3968 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3969 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3970 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3971 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3972 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3979 return MCDisassembler::Fail;
3981 if (fieldFromInstruction32(Insn, 4, 1))
3983 index = fieldFromInstruction32(Insn, 5, 3);
3986 if (fieldFromInstruction32(Insn, 4, 1))
3988 index = fieldFromInstruction32(Insn, 6, 2);
3989 if (fieldFromInstruction32(Insn, 5, 1))
3993 if (fieldFromInstruction32(Insn, 4, 2))
3994 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3995 index = fieldFromInstruction32(Insn, 7, 1);
3996 if (fieldFromInstruction32(Insn, 6, 1))
4001 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4002 return MCDisassembler::Fail;
4003 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4004 return MCDisassembler::Fail;
4005 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4006 return MCDisassembler::Fail;
4007 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4008 return MCDisassembler::Fail;
4010 if (Rm != 0xF) { // Writeback
4011 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4012 return MCDisassembler::Fail;
4014 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4015 return MCDisassembler::Fail;
4016 Inst.addOperand(MCOperand::CreateImm(align));
4019 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4020 return MCDisassembler::Fail;
4022 Inst.addOperand(MCOperand::CreateReg(0));
4025 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4026 return MCDisassembler::Fail;
4027 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4028 return MCDisassembler::Fail;
4029 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4030 return MCDisassembler::Fail;
4031 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4032 return MCDisassembler::Fail;
4033 Inst.addOperand(MCOperand::CreateImm(index));
4038 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4039 uint64_t Address, const void *Decoder) {
4040 DecodeStatus S = MCDisassembler::Success;
4042 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4043 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
4044 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
4045 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
4046 unsigned size = fieldFromInstruction32(Insn, 10, 2);
4053 return MCDisassembler::Fail;
4055 if (fieldFromInstruction32(Insn, 4, 1))
4057 index = fieldFromInstruction32(Insn, 5, 3);
4060 if (fieldFromInstruction32(Insn, 4, 1))
4062 index = fieldFromInstruction32(Insn, 6, 2);
4063 if (fieldFromInstruction32(Insn, 5, 1))
4067 if (fieldFromInstruction32(Insn, 4, 2))
4068 align = 4 << fieldFromInstruction32(Insn, 4, 2);
4069 index = fieldFromInstruction32(Insn, 7, 1);
4070 if (fieldFromInstruction32(Insn, 6, 1))
4075 if (Rm != 0xF) { // Writeback
4076 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4077 return MCDisassembler::Fail;
4079 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4080 return MCDisassembler::Fail;
4081 Inst.addOperand(MCOperand::CreateImm(align));
4084 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4085 return MCDisassembler::Fail;
4087 Inst.addOperand(MCOperand::CreateReg(0));
4090 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4091 return MCDisassembler::Fail;
4092 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4093 return MCDisassembler::Fail;
4094 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4095 return MCDisassembler::Fail;
4096 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4097 return MCDisassembler::Fail;
4098 Inst.addOperand(MCOperand::CreateImm(index));
4103 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4104 uint64_t Address, const void *Decoder) {
4105 DecodeStatus S = MCDisassembler::Success;
4106 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4107 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
4108 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
4109 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
4110 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
4112 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4113 S = MCDisassembler::SoftFail;
4115 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4116 return MCDisassembler::Fail;
4117 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4118 return MCDisassembler::Fail;
4119 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4120 return MCDisassembler::Fail;
4121 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4122 return MCDisassembler::Fail;
4123 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4124 return MCDisassembler::Fail;
4129 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4130 uint64_t Address, const void *Decoder) {
4131 DecodeStatus S = MCDisassembler::Success;
4132 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4133 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
4134 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
4135 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
4136 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
4138 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4139 S = MCDisassembler::SoftFail;
4141 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4142 return MCDisassembler::Fail;
4143 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4144 return MCDisassembler::Fail;
4145 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4146 return MCDisassembler::Fail;
4147 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4148 return MCDisassembler::Fail;
4149 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4150 return MCDisassembler::Fail;
4155 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4156 uint64_t Address, const void *Decoder) {
4157 DecodeStatus S = MCDisassembler::Success;
4158 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
4159 // The InstPrinter needs to have the low bit of the predicate in
4160 // the mask operand to be able to print it properly.
4161 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
4165 S = MCDisassembler::SoftFail;
4168 if ((mask & 0xF) == 0) {
4169 // Preserve the high bit of the mask, which is the low bit of
4173 S = MCDisassembler::SoftFail;
4176 Inst.addOperand(MCOperand::CreateImm(pred));
4177 Inst.addOperand(MCOperand::CreateImm(mask));
4182 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4183 uint64_t Address, const void *Decoder) {
4184 DecodeStatus S = MCDisassembler::Success;
4186 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4187 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
4188 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4189 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
4190 unsigned W = fieldFromInstruction32(Insn, 21, 1);
4191 unsigned U = fieldFromInstruction32(Insn, 23, 1);
4192 unsigned P = fieldFromInstruction32(Insn, 24, 1);
4193 bool writeback = (W == 1) | (P == 0);
4195 addr |= (U << 8) | (Rn << 9);
4197 if (writeback && (Rn == Rt || Rn == Rt2))
4198 Check(S, MCDisassembler::SoftFail);
4200 Check(S, MCDisassembler::SoftFail);
4203 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4204 return MCDisassembler::Fail;
4206 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4207 return MCDisassembler::Fail;
4208 // Writeback operand
4209 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4210 return MCDisassembler::Fail;
4212 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4213 return MCDisassembler::Fail;
4219 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4220 uint64_t Address, const void *Decoder) {
4221 DecodeStatus S = MCDisassembler::Success;
4223 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4224 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
4225 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4226 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
4227 unsigned W = fieldFromInstruction32(Insn, 21, 1);
4228 unsigned U = fieldFromInstruction32(Insn, 23, 1);
4229 unsigned P = fieldFromInstruction32(Insn, 24, 1);
4230 bool writeback = (W == 1) | (P == 0);
4232 addr |= (U << 8) | (Rn << 9);
4234 if (writeback && (Rn == Rt || Rn == Rt2))
4235 Check(S, MCDisassembler::SoftFail);
4237 // Writeback operand
4238 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4239 return MCDisassembler::Fail;
4241 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4242 return MCDisassembler::Fail;
4244 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4245 return MCDisassembler::Fail;
4247 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4248 return MCDisassembler::Fail;
4253 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4254 uint64_t Address, const void *Decoder) {
4255 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
4256 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
4257 if (sign1 != sign2) return MCDisassembler::Fail;
4259 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
4260 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
4261 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
4263 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4265 return MCDisassembler::Success;
4268 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4270 const void *Decoder) {
4271 DecodeStatus S = MCDisassembler::Success;
4273 // Shift of "asr #32" is not allowed in Thumb2 mode.
4274 if (Val == 0x20) S = MCDisassembler::SoftFail;
4275 Inst.addOperand(MCOperand::CreateImm(Val));
4279 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4280 uint64_t Address, const void *Decoder) {
4281 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4282 unsigned Rt2 = fieldFromInstruction32(Insn, 0, 4);
4283 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4284 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
4287 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4289 DecodeStatus S = MCDisassembler::Success;
4290 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4291 return MCDisassembler::Fail;
4292 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4293 return MCDisassembler::Fail;
4294 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4295 return MCDisassembler::Fail;
4296 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4297 return MCDisassembler::Fail;
4302 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4303 uint64_t Address, const void *Decoder) {
4304 unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
4305 Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
4306 unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
4307 Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
4308 unsigned imm = fieldFromInstruction32(Insn, 16, 6);
4309 unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
4311 DecodeStatus S = MCDisassembler::Success;
4313 // VMOVv2f32 is ambiguous with these decodings.
4314 if (!(imm & 0x38) && cmode == 0xF) {
4315 Inst.setOpcode(ARM::VMOVv2f32);
4316 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4319 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4321 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4322 return MCDisassembler::Fail;
4323 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4324 return MCDisassembler::Fail;
4325 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4330 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4331 uint64_t Address, const void *Decoder) {
4332 unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
4333 Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
4334 unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
4335 Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
4336 unsigned imm = fieldFromInstruction32(Insn, 16, 6);
4337 unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
4339 DecodeStatus S = MCDisassembler::Success;
4341 // VMOVv4f32 is ambiguous with these decodings.
4342 if (!(imm & 0x38) && cmode == 0xF) {
4343 Inst.setOpcode(ARM::VMOVv4f32);
4344 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4347 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4349 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4350 return MCDisassembler::Fail;
4351 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4352 return MCDisassembler::Fail;
4353 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4358 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4359 uint64_t Address, const void *Decoder) {
4360 DecodeStatus S = MCDisassembler::Success;
4362 unsigned Rn = fieldFromInstruction32(Val, 16, 4);
4363 unsigned Rt = fieldFromInstruction32(Val, 12, 4);
4364 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
4365 Rm |= (fieldFromInstruction32(Val, 23, 1) << 4);
4366 unsigned Cond = fieldFromInstruction32(Val, 28, 4);
4368 if (fieldFromInstruction32(Val, 8, 4) != 0 || Rn == Rt)
4369 S = MCDisassembler::SoftFail;
4371 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4372 return MCDisassembler::Fail;
4373 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4374 return MCDisassembler::Fail;
4375 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4376 return MCDisassembler::Fail;
4377 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4378 return MCDisassembler::Fail;
4379 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4380 return MCDisassembler::Fail;