1 //===-- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #define DEBUG_TYPE "arm-disassembler"
13 #include "ARMSubtarget.h"
14 #include "MCTargetDesc/ARMAddressingModes.h"
15 #include "MCTargetDesc/ARMMCExpr.h"
16 #include "MCTargetDesc/ARMBaseInfo.h"
17 #include "llvm/MC/EDInstInfo.h"
18 #include "llvm/MC/MCInst.h"
19 #include "llvm/MC/MCInstrDesc.h"
20 #include "llvm/MC/MCExpr.h"
21 #include "llvm/MC/MCContext.h"
22 #include "llvm/MC/MCDisassembler.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Support/MemoryObject.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/TargetRegistry.h"
27 #include "llvm/Support/raw_ostream.h"
31 typedef MCDisassembler::DecodeStatus DecodeStatus;
34 /// ARMDisassembler - ARM disassembler for all ARM platforms.
35 class ARMDisassembler : public MCDisassembler {
37 /// Constructor - Initializes the disassembler.
39 ARMDisassembler(const MCSubtargetInfo &STI) :
46 /// getInstruction - See MCDisassembler.
47 DecodeStatus getInstruction(MCInst &instr,
49 const MemoryObject ®ion,
52 raw_ostream &cStream) const;
54 /// getEDInfo - See MCDisassembler.
55 const EDInstInfo *getEDInfo() const;
59 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
60 class ThumbDisassembler : public MCDisassembler {
62 /// Constructor - Initializes the disassembler.
64 ThumbDisassembler(const MCSubtargetInfo &STI) :
68 ~ThumbDisassembler() {
71 /// getInstruction - See MCDisassembler.
72 DecodeStatus getInstruction(MCInst &instr,
74 const MemoryObject ®ion,
77 raw_ostream &cStream) const;
79 /// getEDInfo - See MCDisassembler.
80 const EDInstInfo *getEDInfo() const;
82 mutable std::vector<unsigned> ITBlock;
83 DecodeStatus AddThumbPredicate(MCInst&) const;
84 void UpdateThumbVFPPredicate(MCInst&) const;
88 static bool Check(DecodeStatus &Out, DecodeStatus In) {
90 case MCDisassembler::Success:
91 // Out stays the same.
93 case MCDisassembler::SoftFail:
96 case MCDisassembler::Fail:
100 llvm_unreachable("Invalid DecodeStatus!");
104 // Forward declare these because the autogenerated code will reference them.
105 // Definitions are further down.
106 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
107 uint64_t Address, const void *Decoder);
108 static DecodeStatus DecodeGPRnopcRegisterClass(llvm::MCInst &Inst,
109 unsigned RegNo, uint64_t Address,
110 const void *Decoder);
111 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
112 uint64_t Address, const void *Decoder);
113 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
114 uint64_t Address, const void *Decoder);
115 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
116 uint64_t Address, const void *Decoder);
117 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
118 uint64_t Address, const void *Decoder);
119 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
120 uint64_t Address, const void *Decoder);
121 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
122 uint64_t Address, const void *Decoder);
123 static DecodeStatus DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst,
126 const void *Decoder);
127 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
128 uint64_t Address, const void *Decoder);
129 static DecodeStatus DecodeDPairRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
130 uint64_t Address, const void *Decoder);
132 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
133 uint64_t Address, const void *Decoder);
134 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
135 uint64_t Address, const void *Decoder);
136 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
137 uint64_t Address, const void *Decoder);
138 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
139 uint64_t Address, const void *Decoder);
140 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
141 uint64_t Address, const void *Decoder);
142 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
143 uint64_t Address, const void *Decoder);
145 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Insn,
146 uint64_t Address, const void *Decoder);
147 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
148 uint64_t Address, const void *Decoder);
149 static DecodeStatus DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst,
152 const void *Decoder);
153 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Insn,
154 uint64_t Address, const void *Decoder);
155 static DecodeStatus DecodeAddrMode3Instruction(llvm::MCInst &Inst,unsigned Insn,
156 uint64_t Address, const void *Decoder);
157 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Insn,
158 uint64_t Address, const void *Decoder);
159 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Insn,
160 uint64_t Address, const void *Decoder);
162 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst & Inst,
165 const void *Decoder);
166 static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
167 uint64_t Address, const void *Decoder);
168 static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
169 uint64_t Address, const void *Decoder);
170 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
171 uint64_t Address, const void *Decoder);
172 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
173 uint64_t Address, const void *Decoder);
174 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
175 uint64_t Address, const void *Decoder);
176 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
177 uint64_t Address, const void *Decoder);
178 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
179 uint64_t Address, const void *Decoder);
180 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
181 uint64_t Address, const void *Decoder);
182 static DecodeStatus DecodeBranchImmInstruction(llvm::MCInst &Inst,unsigned Insn,
183 uint64_t Address, const void *Decoder);
184 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
185 uint64_t Address, const void *Decoder);
186 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
188 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Val,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeNEONModImmInstruction(llvm::MCInst &Inst,unsigned Val,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Val,
201 uint64_t Address, const void *Decoder);
202 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
203 uint64_t Address, const void *Decoder);
204 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
205 uint64_t Address, const void *Decoder);
206 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
207 uint64_t Address, const void *Decoder);
208 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
209 uint64_t Address, const void *Decoder);
210 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
211 uint64_t Address, const void *Decoder);
212 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
213 uint64_t Address, const void *Decoder);
214 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Insn,
215 uint64_t Address, const void *Decoder);
216 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
217 uint64_t Address, const void *Decoder);
218 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn,
219 uint64_t Address, const void *Decoder);
220 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
221 uint64_t Address, const void *Decoder);
222 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
223 uint64_t Address, const void *Decoder);
224 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
225 uint64_t Address, const void *Decoder);
226 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
227 uint64_t Address, const void *Decoder);
228 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
229 uint64_t Address, const void *Decoder);
230 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
231 uint64_t Address, const void *Decoder);
232 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
233 uint64_t Address, const void *Decoder);
234 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
235 uint64_t Address, const void *Decoder);
236 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
237 uint64_t Address, const void *Decoder);
238 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
239 uint64_t Address, const void *Decoder);
240 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
241 uint64_t Address, const void *Decoder);
242 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
243 uint64_t Address, const void *Decoder);
244 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
245 uint64_t Address, const void *Decoder);
246 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
247 uint64_t Address, const void *Decoder);
248 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
249 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
251 uint64_t Address, const void *Decoder);
252 static DecodeStatus DecodeSwap(llvm::MCInst &Inst, unsigned Insn,
253 uint64_t Address, const void *Decoder);
254 static DecodeStatus DecodeVCVTD(llvm::MCInst &Inst, unsigned Insn,
255 uint64_t Address, const void *Decoder);
256 static DecodeStatus DecodeVCVTQ(llvm::MCInst &Inst, unsigned Insn,
257 uint64_t Address, const void *Decoder);
260 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
261 uint64_t Address, const void *Decoder);
262 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
263 uint64_t Address, const void *Decoder);
264 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
265 uint64_t Address, const void *Decoder);
266 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
267 uint64_t Address, const void *Decoder);
268 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
269 uint64_t Address, const void *Decoder);
270 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
271 uint64_t Address, const void *Decoder);
272 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Val,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val,
307 uint64_t Address, const void *Decoder);
308 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
309 uint64_t Address, const void *Decoder);
310 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Val,
311 uint64_t Address, const void *Decoder);
312 static DecodeStatus DecodeT2LDRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
313 uint64_t Address, const void *Decoder);
314 static DecodeStatus DecodeT2STRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
315 uint64_t Address, const void *Decoder);
316 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, unsigned Val,
317 uint64_t Address, const void *Decoder);
318 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Val,
319 uint64_t Address, const void *Decoder);
320 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, unsigned Val,
321 uint64_t Address, const void *Decoder);
325 #include "ARMGenDisassemblerTables.inc"
326 #include "ARMGenInstrInfo.inc"
327 #include "ARMGenEDInfo.inc"
329 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
330 return new ARMDisassembler(STI);
333 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
334 return new ThumbDisassembler(STI);
337 const EDInstInfo *ARMDisassembler::getEDInfo() const {
341 const EDInstInfo *ThumbDisassembler::getEDInfo() const {
345 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
346 const MemoryObject &Region,
349 raw_ostream &cs) const {
354 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
355 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
357 // We want to read exactly 4 bytes of data.
358 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
360 return MCDisassembler::Fail;
363 // Encoded as a small-endian 32-bit word in the stream.
364 uint32_t insn = (bytes[3] << 24) |
369 // Calling the auto-generated decoder function.
370 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
371 if (result != MCDisassembler::Fail) {
376 // VFP and NEON instructions, similarly, are shared between ARM
379 result = decodeVFPInstruction32(MI, insn, Address, this, STI);
380 if (result != MCDisassembler::Fail) {
386 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
387 if (result != MCDisassembler::Fail) {
389 // Add a fake predicate operand, because we share these instruction
390 // definitions with Thumb2 where these instructions are predicable.
391 if (!DecodePredicateOperand(MI, 0xE, Address, this))
392 return MCDisassembler::Fail;
397 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
398 if (result != MCDisassembler::Fail) {
400 // Add a fake predicate operand, because we share these instruction
401 // definitions with Thumb2 where these instructions are predicable.
402 if (!DecodePredicateOperand(MI, 0xE, Address, this))
403 return MCDisassembler::Fail;
408 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
409 if (result != MCDisassembler::Fail) {
411 // Add a fake predicate operand, because we share these instruction
412 // definitions with Thumb2 where these instructions are predicable.
413 if (!DecodePredicateOperand(MI, 0xE, Address, this))
414 return MCDisassembler::Fail;
421 return MCDisassembler::Fail;
425 extern const MCInstrDesc ARMInsts[];
428 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
429 /// immediate Value in the MCInst. The immediate Value has had any PC
430 /// adjustment made by the caller. If the instruction is a branch instruction
431 /// then isBranch is true, else false. If the getOpInfo() function was set as
432 /// part of the setupForSymbolicDisassembly() call then that function is called
433 /// to get any symbolic information at the Address for this instruction. If
434 /// that returns non-zero then the symbolic information it returns is used to
435 /// create an MCExpr and that is added as an operand to the MCInst. If
436 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
437 /// Value is done and if a symbol is found an MCExpr is created with that, else
438 /// an MCExpr with Value is created. This function returns true if it adds an
439 /// operand to the MCInst and false otherwise.
440 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
441 bool isBranch, uint64_t InstSize,
442 MCInst &MI, const void *Decoder) {
443 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
444 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
445 struct LLVMOpInfo1 SymbolicOp;
446 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
447 SymbolicOp.Value = Value;
448 void *DisInfo = Dis->getDisInfoBlock();
451 !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
452 // Clear SymbolicOp.Value from above and also all other fields.
453 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
454 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
457 uint64_t ReferenceType;
459 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
461 ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
462 const char *ReferenceName;
463 const char *Name = SymbolLookUp(DisInfo, Value, &ReferenceType, Address,
466 SymbolicOp.AddSymbol.Name = Name;
467 SymbolicOp.AddSymbol.Present = true;
469 // For branches always create an MCExpr so it gets printed as hex address.
471 SymbolicOp.Value = Value;
473 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
474 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
475 if (!Name && !isBranch)
479 MCContext *Ctx = Dis->getMCContext();
480 const MCExpr *Add = NULL;
481 if (SymbolicOp.AddSymbol.Present) {
482 if (SymbolicOp.AddSymbol.Name) {
483 StringRef Name(SymbolicOp.AddSymbol.Name);
484 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
485 Add = MCSymbolRefExpr::Create(Sym, *Ctx);
487 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
491 const MCExpr *Sub = NULL;
492 if (SymbolicOp.SubtractSymbol.Present) {
493 if (SymbolicOp.SubtractSymbol.Name) {
494 StringRef Name(SymbolicOp.SubtractSymbol.Name);
495 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
496 Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
498 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
502 const MCExpr *Off = NULL;
503 if (SymbolicOp.Value != 0)
504 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
510 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
512 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
514 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
519 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
526 Expr = MCConstantExpr::Create(0, *Ctx);
529 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
530 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
531 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
532 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
533 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
534 MI.addOperand(MCOperand::CreateExpr(Expr));
536 llvm_unreachable("bad SymbolicOp.VariantKind");
541 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
542 /// referenced by a load instruction with the base register that is the Pc.
543 /// These can often be values in a literal pool near the Address of the
544 /// instruction. The Address of the instruction and its immediate Value are
545 /// used as a possible literal pool entry. The SymbolLookUp call back will
546 /// return the name of a symbol referenced by the the literal pool's entry if
547 /// the referenced address is that of a symbol. Or it will return a pointer to
548 /// a literal 'C' string if the referenced address of the literal pool's entry
549 /// is an address into a section with 'C' string literals.
550 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
551 const void *Decoder) {
552 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
553 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
555 void *DisInfo = Dis->getDisInfoBlock();
556 uint64_t ReferenceType;
557 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
558 const char *ReferenceName;
559 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
560 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
561 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
562 (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
566 // Thumb1 instructions don't have explicit S bits. Rather, they
567 // implicitly set CPSR. Since it's not represented in the encoding, the
568 // auto-generated decoder won't inject the CPSR operand. We need to fix
569 // that as a post-pass.
570 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
571 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
572 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
573 MCInst::iterator I = MI.begin();
574 for (unsigned i = 0; i < NumOps; ++i, ++I) {
575 if (I == MI.end()) break;
576 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
577 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
578 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
583 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
586 // Most Thumb instructions don't have explicit predicates in the
587 // encoding, but rather get their predicates from IT context. We need
588 // to fix up the predicate operands using this context information as a
590 MCDisassembler::DecodeStatus
591 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
592 MCDisassembler::DecodeStatus S = Success;
594 // A few instructions actually have predicates encoded in them. Don't
595 // try to overwrite it if we're seeing one of those.
596 switch (MI.getOpcode()) {
607 // Some instructions (mostly conditional branches) are not
608 // allowed in IT blocks.
609 if (!ITBlock.empty())
618 // Some instructions (mostly unconditional branches) can
619 // only appears at the end of, or outside of, an IT.
620 if (ITBlock.size() > 1)
627 // If we're in an IT block, base the predicate on that. Otherwise,
628 // assume a predicate of AL.
630 if (!ITBlock.empty()) {
638 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
639 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
640 MCInst::iterator I = MI.begin();
641 for (unsigned i = 0; i < NumOps; ++i, ++I) {
642 if (I == MI.end()) break;
643 if (OpInfo[i].isPredicate()) {
644 I = MI.insert(I, MCOperand::CreateImm(CC));
647 MI.insert(I, MCOperand::CreateReg(0));
649 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
654 I = MI.insert(I, MCOperand::CreateImm(CC));
657 MI.insert(I, MCOperand::CreateReg(0));
659 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
664 // Thumb VFP instructions are a special case. Because we share their
665 // encodings between ARM and Thumb modes, and they are predicable in ARM
666 // mode, the auto-generated decoder will give them an (incorrect)
667 // predicate operand. We need to rewrite these operands based on the IT
668 // context as a post-pass.
669 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
671 if (!ITBlock.empty()) {
677 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
678 MCInst::iterator I = MI.begin();
679 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
680 for (unsigned i = 0; i < NumOps; ++i, ++I) {
681 if (OpInfo[i].isPredicate() ) {
687 I->setReg(ARM::CPSR);
693 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
694 const MemoryObject &Region,
697 raw_ostream &cs) const {
702 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
703 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
705 // We want to read exactly 2 bytes of data.
706 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
708 return MCDisassembler::Fail;
711 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
712 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
713 if (result != MCDisassembler::Fail) {
715 Check(result, AddThumbPredicate(MI));
720 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
723 bool InITBlock = !ITBlock.empty();
724 Check(result, AddThumbPredicate(MI));
725 AddThumb1SBit(MI, InITBlock);
730 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
731 if (result != MCDisassembler::Fail) {
734 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
735 // the Thumb predicate.
736 if (MI.getOpcode() == ARM::t2IT && !ITBlock.empty())
737 result = MCDisassembler::SoftFail;
739 Check(result, AddThumbPredicate(MI));
741 // If we find an IT instruction, we need to parse its condition
742 // code and mask operands so that we can apply them correctly
743 // to the subsequent instructions.
744 if (MI.getOpcode() == ARM::t2IT) {
746 // (3 - the number of trailing zeros) is the number of then / else.
747 unsigned firstcond = MI.getOperand(0).getImm();
748 unsigned Mask = MI.getOperand(1).getImm();
749 unsigned CondBit0 = Mask >> 4 & 1;
750 unsigned NumTZ = CountTrailingZeros_32(Mask);
751 assert(NumTZ <= 3 && "Invalid IT mask!");
752 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
753 bool T = ((Mask >> Pos) & 1) == CondBit0;
755 ITBlock.insert(ITBlock.begin(), firstcond);
757 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
760 ITBlock.push_back(firstcond);
766 // We want to read exactly 4 bytes of data.
767 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
769 return MCDisassembler::Fail;
772 uint32_t insn32 = (bytes[3] << 8) |
777 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
778 if (result != MCDisassembler::Fail) {
780 bool InITBlock = ITBlock.size();
781 Check(result, AddThumbPredicate(MI));
782 AddThumb1SBit(MI, InITBlock);
787 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
788 if (result != MCDisassembler::Fail) {
790 Check(result, AddThumbPredicate(MI));
795 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
796 if (result != MCDisassembler::Fail) {
798 UpdateThumbVFPPredicate(MI);
803 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
804 if (result != MCDisassembler::Fail) {
806 Check(result, AddThumbPredicate(MI));
810 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
812 uint32_t NEONLdStInsn = insn32;
813 NEONLdStInsn &= 0xF0FFFFFF;
814 NEONLdStInsn |= 0x04000000;
815 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
816 if (result != MCDisassembler::Fail) {
818 Check(result, AddThumbPredicate(MI));
823 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
825 uint32_t NEONDataInsn = insn32;
826 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
827 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
828 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
829 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
830 if (result != MCDisassembler::Fail) {
832 Check(result, AddThumbPredicate(MI));
838 return MCDisassembler::Fail;
842 extern "C" void LLVMInitializeARMDisassembler() {
843 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
844 createARMDisassembler);
845 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
846 createThumbDisassembler);
849 static const unsigned GPRDecoderTable[] = {
850 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
851 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
852 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
853 ARM::R12, ARM::SP, ARM::LR, ARM::PC
856 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
857 uint64_t Address, const void *Decoder) {
859 return MCDisassembler::Fail;
861 unsigned Register = GPRDecoderTable[RegNo];
862 Inst.addOperand(MCOperand::CreateReg(Register));
863 return MCDisassembler::Success;
867 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
868 uint64_t Address, const void *Decoder) {
869 if (RegNo == 15) return MCDisassembler::Fail;
870 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
873 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
874 uint64_t Address, const void *Decoder) {
876 return MCDisassembler::Fail;
877 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
880 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
881 uint64_t Address, const void *Decoder) {
882 unsigned Register = 0;
903 return MCDisassembler::Fail;
906 Inst.addOperand(MCOperand::CreateReg(Register));
907 return MCDisassembler::Success;
910 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
911 uint64_t Address, const void *Decoder) {
912 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
913 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
916 static const unsigned SPRDecoderTable[] = {
917 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
918 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
919 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
920 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
921 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
922 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
923 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
924 ARM::S28, ARM::S29, ARM::S30, ARM::S31
927 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
928 uint64_t Address, const void *Decoder) {
930 return MCDisassembler::Fail;
932 unsigned Register = SPRDecoderTable[RegNo];
933 Inst.addOperand(MCOperand::CreateReg(Register));
934 return MCDisassembler::Success;
937 static const unsigned DPRDecoderTable[] = {
938 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
939 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
940 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
941 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
942 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
943 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
944 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
945 ARM::D28, ARM::D29, ARM::D30, ARM::D31
948 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
949 uint64_t Address, const void *Decoder) {
951 return MCDisassembler::Fail;
953 unsigned Register = DPRDecoderTable[RegNo];
954 Inst.addOperand(MCOperand::CreateReg(Register));
955 return MCDisassembler::Success;
958 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
959 uint64_t Address, const void *Decoder) {
961 return MCDisassembler::Fail;
962 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
966 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
967 uint64_t Address, const void *Decoder) {
969 return MCDisassembler::Fail;
970 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
973 static const unsigned QPRDecoderTable[] = {
974 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
975 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
976 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
977 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
981 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
982 uint64_t Address, const void *Decoder) {
984 return MCDisassembler::Fail;
987 unsigned Register = QPRDecoderTable[RegNo];
988 Inst.addOperand(MCOperand::CreateReg(Register));
989 return MCDisassembler::Success;
992 static const unsigned DPairDecoderTable[] = {
993 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
994 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
995 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
996 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
997 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1001 static DecodeStatus DecodeDPairRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
1002 uint64_t Address, const void *Decoder) {
1004 return MCDisassembler::Fail;
1006 unsigned Register = DPairDecoderTable[RegNo];
1007 Inst.addOperand(MCOperand::CreateReg(Register));
1008 return MCDisassembler::Success;
1011 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
1012 uint64_t Address, const void *Decoder) {
1013 if (Val == 0xF) return MCDisassembler::Fail;
1014 // AL predicate is not allowed on Thumb1 branches.
1015 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1016 return MCDisassembler::Fail;
1017 Inst.addOperand(MCOperand::CreateImm(Val));
1018 if (Val == ARMCC::AL) {
1019 Inst.addOperand(MCOperand::CreateReg(0));
1021 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1022 return MCDisassembler::Success;
1025 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
1026 uint64_t Address, const void *Decoder) {
1028 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1030 Inst.addOperand(MCOperand::CreateReg(0));
1031 return MCDisassembler::Success;
1034 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
1035 uint64_t Address, const void *Decoder) {
1036 uint32_t imm = Val & 0xFF;
1037 uint32_t rot = (Val & 0xF00) >> 7;
1038 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1039 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1040 return MCDisassembler::Success;
1043 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
1044 uint64_t Address, const void *Decoder) {
1045 DecodeStatus S = MCDisassembler::Success;
1047 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1048 unsigned type = fieldFromInstruction32(Val, 5, 2);
1049 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1051 // Register-immediate
1052 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1053 return MCDisassembler::Fail;
1055 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1058 Shift = ARM_AM::lsl;
1061 Shift = ARM_AM::lsr;
1064 Shift = ARM_AM::asr;
1067 Shift = ARM_AM::ror;
1071 if (Shift == ARM_AM::ror && imm == 0)
1072 Shift = ARM_AM::rrx;
1074 unsigned Op = Shift | (imm << 3);
1075 Inst.addOperand(MCOperand::CreateImm(Op));
1080 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
1081 uint64_t Address, const void *Decoder) {
1082 DecodeStatus S = MCDisassembler::Success;
1084 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1085 unsigned type = fieldFromInstruction32(Val, 5, 2);
1086 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
1088 // Register-register
1089 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1090 return MCDisassembler::Fail;
1091 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1092 return MCDisassembler::Fail;
1094 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1097 Shift = ARM_AM::lsl;
1100 Shift = ARM_AM::lsr;
1103 Shift = ARM_AM::asr;
1106 Shift = ARM_AM::ror;
1110 Inst.addOperand(MCOperand::CreateImm(Shift));
1115 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
1116 uint64_t Address, const void *Decoder) {
1117 DecodeStatus S = MCDisassembler::Success;
1119 bool writebackLoad = false;
1120 unsigned writebackReg = 0;
1121 switch (Inst.getOpcode()) {
1124 case ARM::LDMIA_UPD:
1125 case ARM::LDMDB_UPD:
1126 case ARM::LDMIB_UPD:
1127 case ARM::LDMDA_UPD:
1128 case ARM::t2LDMIA_UPD:
1129 case ARM::t2LDMDB_UPD:
1130 writebackLoad = true;
1131 writebackReg = Inst.getOperand(0).getReg();
1135 // Empty register lists are not allowed.
1136 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1137 for (unsigned i = 0; i < 16; ++i) {
1138 if (Val & (1 << i)) {
1139 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1140 return MCDisassembler::Fail;
1141 // Writeback not allowed if Rn is in the target list.
1142 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1143 Check(S, MCDisassembler::SoftFail);
1150 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
1151 uint64_t Address, const void *Decoder) {
1152 DecodeStatus S = MCDisassembler::Success;
1154 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1155 unsigned regs = Val & 0xFF;
1157 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1158 return MCDisassembler::Fail;
1159 for (unsigned i = 0; i < (regs - 1); ++i) {
1160 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1161 return MCDisassembler::Fail;
1167 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
1168 uint64_t Address, const void *Decoder) {
1169 DecodeStatus S = MCDisassembler::Success;
1171 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1172 unsigned regs = (Val & 0xFF) / 2;
1174 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1175 return MCDisassembler::Fail;
1176 for (unsigned i = 0; i < (regs - 1); ++i) {
1177 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1178 return MCDisassembler::Fail;
1184 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
1185 uint64_t Address, const void *Decoder) {
1186 // This operand encodes a mask of contiguous zeros between a specified MSB
1187 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1188 // the mask of all bits LSB-and-lower, and then xor them to create
1189 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1190 // create the final mask.
1191 unsigned msb = fieldFromInstruction32(Val, 5, 5);
1192 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
1194 DecodeStatus S = MCDisassembler::Success;
1195 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1197 uint32_t msb_mask = 0xFFFFFFFF;
1198 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1199 uint32_t lsb_mask = (1U << lsb) - 1;
1201 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1205 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
1206 uint64_t Address, const void *Decoder) {
1207 DecodeStatus S = MCDisassembler::Success;
1209 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1210 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
1211 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
1212 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
1213 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1214 unsigned U = fieldFromInstruction32(Insn, 23, 1);
1216 switch (Inst.getOpcode()) {
1217 case ARM::LDC_OFFSET:
1220 case ARM::LDC_OPTION:
1221 case ARM::LDCL_OFFSET:
1223 case ARM::LDCL_POST:
1224 case ARM::LDCL_OPTION:
1225 case ARM::STC_OFFSET:
1228 case ARM::STC_OPTION:
1229 case ARM::STCL_OFFSET:
1231 case ARM::STCL_POST:
1232 case ARM::STCL_OPTION:
1233 case ARM::t2LDC_OFFSET:
1234 case ARM::t2LDC_PRE:
1235 case ARM::t2LDC_POST:
1236 case ARM::t2LDC_OPTION:
1237 case ARM::t2LDCL_OFFSET:
1238 case ARM::t2LDCL_PRE:
1239 case ARM::t2LDCL_POST:
1240 case ARM::t2LDCL_OPTION:
1241 case ARM::t2STC_OFFSET:
1242 case ARM::t2STC_PRE:
1243 case ARM::t2STC_POST:
1244 case ARM::t2STC_OPTION:
1245 case ARM::t2STCL_OFFSET:
1246 case ARM::t2STCL_PRE:
1247 case ARM::t2STCL_POST:
1248 case ARM::t2STCL_OPTION:
1249 if (coproc == 0xA || coproc == 0xB)
1250 return MCDisassembler::Fail;
1256 Inst.addOperand(MCOperand::CreateImm(coproc));
1257 Inst.addOperand(MCOperand::CreateImm(CRd));
1258 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1259 return MCDisassembler::Fail;
1261 switch (Inst.getOpcode()) {
1262 case ARM::t2LDC2_OFFSET:
1263 case ARM::t2LDC2L_OFFSET:
1264 case ARM::t2LDC2_PRE:
1265 case ARM::t2LDC2L_PRE:
1266 case ARM::t2STC2_OFFSET:
1267 case ARM::t2STC2L_OFFSET:
1268 case ARM::t2STC2_PRE:
1269 case ARM::t2STC2L_PRE:
1270 case ARM::LDC2_OFFSET:
1271 case ARM::LDC2L_OFFSET:
1273 case ARM::LDC2L_PRE:
1274 case ARM::STC2_OFFSET:
1275 case ARM::STC2L_OFFSET:
1277 case ARM::STC2L_PRE:
1278 case ARM::t2LDC_OFFSET:
1279 case ARM::t2LDCL_OFFSET:
1280 case ARM::t2LDC_PRE:
1281 case ARM::t2LDCL_PRE:
1282 case ARM::t2STC_OFFSET:
1283 case ARM::t2STCL_OFFSET:
1284 case ARM::t2STC_PRE:
1285 case ARM::t2STCL_PRE:
1286 case ARM::LDC_OFFSET:
1287 case ARM::LDCL_OFFSET:
1290 case ARM::STC_OFFSET:
1291 case ARM::STCL_OFFSET:
1294 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1295 Inst.addOperand(MCOperand::CreateImm(imm));
1297 case ARM::t2LDC2_POST:
1298 case ARM::t2LDC2L_POST:
1299 case ARM::t2STC2_POST:
1300 case ARM::t2STC2L_POST:
1301 case ARM::LDC2_POST:
1302 case ARM::LDC2L_POST:
1303 case ARM::STC2_POST:
1304 case ARM::STC2L_POST:
1305 case ARM::t2LDC_POST:
1306 case ARM::t2LDCL_POST:
1307 case ARM::t2STC_POST:
1308 case ARM::t2STCL_POST:
1310 case ARM::LDCL_POST:
1312 case ARM::STCL_POST:
1316 // The 'option' variant doesn't encode 'U' in the immediate since
1317 // the immediate is unsigned [0,255].
1318 Inst.addOperand(MCOperand::CreateImm(imm));
1322 switch (Inst.getOpcode()) {
1323 case ARM::LDC_OFFSET:
1326 case ARM::LDC_OPTION:
1327 case ARM::LDCL_OFFSET:
1329 case ARM::LDCL_POST:
1330 case ARM::LDCL_OPTION:
1331 case ARM::STC_OFFSET:
1334 case ARM::STC_OPTION:
1335 case ARM::STCL_OFFSET:
1337 case ARM::STCL_POST:
1338 case ARM::STCL_OPTION:
1339 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1340 return MCDisassembler::Fail;
1350 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1351 uint64_t Address, const void *Decoder) {
1352 DecodeStatus S = MCDisassembler::Success;
1354 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1355 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1356 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1357 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1358 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1359 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1360 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1361 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1363 // On stores, the writeback operand precedes Rt.
1364 switch (Inst.getOpcode()) {
1365 case ARM::STR_POST_IMM:
1366 case ARM::STR_POST_REG:
1367 case ARM::STRB_POST_IMM:
1368 case ARM::STRB_POST_REG:
1369 case ARM::STRT_POST_REG:
1370 case ARM::STRT_POST_IMM:
1371 case ARM::STRBT_POST_REG:
1372 case ARM::STRBT_POST_IMM:
1373 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1374 return MCDisassembler::Fail;
1380 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1381 return MCDisassembler::Fail;
1383 // On loads, the writeback operand comes after Rt.
1384 switch (Inst.getOpcode()) {
1385 case ARM::LDR_POST_IMM:
1386 case ARM::LDR_POST_REG:
1387 case ARM::LDRB_POST_IMM:
1388 case ARM::LDRB_POST_REG:
1389 case ARM::LDRBT_POST_REG:
1390 case ARM::LDRBT_POST_IMM:
1391 case ARM::LDRT_POST_REG:
1392 case ARM::LDRT_POST_IMM:
1393 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1394 return MCDisassembler::Fail;
1400 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1401 return MCDisassembler::Fail;
1403 ARM_AM::AddrOpc Op = ARM_AM::add;
1404 if (!fieldFromInstruction32(Insn, 23, 1))
1407 bool writeback = (P == 0) || (W == 1);
1408 unsigned idx_mode = 0;
1410 idx_mode = ARMII::IndexModePre;
1411 else if (!P && writeback)
1412 idx_mode = ARMII::IndexModePost;
1414 if (writeback && (Rn == 15 || Rn == Rt))
1415 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1418 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1419 return MCDisassembler::Fail;
1420 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1421 switch( fieldFromInstruction32(Insn, 5, 2)) {
1435 return MCDisassembler::Fail;
1437 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1438 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1440 Inst.addOperand(MCOperand::CreateImm(imm));
1442 Inst.addOperand(MCOperand::CreateReg(0));
1443 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1444 Inst.addOperand(MCOperand::CreateImm(tmp));
1447 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1448 return MCDisassembler::Fail;
1453 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1454 uint64_t Address, const void *Decoder) {
1455 DecodeStatus S = MCDisassembler::Success;
1457 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1458 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1459 unsigned type = fieldFromInstruction32(Val, 5, 2);
1460 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1461 unsigned U = fieldFromInstruction32(Val, 12, 1);
1463 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1479 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1480 return MCDisassembler::Fail;
1481 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1482 return MCDisassembler::Fail;
1485 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1487 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1488 Inst.addOperand(MCOperand::CreateImm(shift));
1494 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1495 uint64_t Address, const void *Decoder) {
1496 DecodeStatus S = MCDisassembler::Success;
1498 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1499 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1500 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1501 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1502 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1503 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1504 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1505 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1506 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1508 bool writeback = (W == 1) | (P == 0);
1510 // For {LD,ST}RD, Rt must be even, else undefined.
1511 switch (Inst.getOpcode()) {
1514 case ARM::STRD_POST:
1517 case ARM::LDRD_POST:
1518 if (Rt & 0x1) return MCDisassembler::Fail;
1524 if (writeback) { // Writeback
1526 U |= ARMII::IndexModePre << 9;
1528 U |= ARMII::IndexModePost << 9;
1530 // On stores, the writeback operand precedes Rt.
1531 switch (Inst.getOpcode()) {
1534 case ARM::STRD_POST:
1537 case ARM::STRH_POST:
1538 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1539 return MCDisassembler::Fail;
1546 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1547 return MCDisassembler::Fail;
1548 switch (Inst.getOpcode()) {
1551 case ARM::STRD_POST:
1554 case ARM::LDRD_POST:
1555 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1556 return MCDisassembler::Fail;
1563 // On loads, the writeback operand comes after Rt.
1564 switch (Inst.getOpcode()) {
1567 case ARM::LDRD_POST:
1570 case ARM::LDRH_POST:
1572 case ARM::LDRSH_PRE:
1573 case ARM::LDRSH_POST:
1575 case ARM::LDRSB_PRE:
1576 case ARM::LDRSB_POST:
1579 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1580 return MCDisassembler::Fail;
1587 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1588 return MCDisassembler::Fail;
1591 Inst.addOperand(MCOperand::CreateReg(0));
1592 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1594 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1595 return MCDisassembler::Fail;
1596 Inst.addOperand(MCOperand::CreateImm(U));
1599 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1600 return MCDisassembler::Fail;
1605 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1606 uint64_t Address, const void *Decoder) {
1607 DecodeStatus S = MCDisassembler::Success;
1609 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1610 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1627 Inst.addOperand(MCOperand::CreateImm(mode));
1628 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1629 return MCDisassembler::Fail;
1634 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1636 uint64_t Address, const void *Decoder) {
1637 DecodeStatus S = MCDisassembler::Success;
1639 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1640 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1641 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1644 switch (Inst.getOpcode()) {
1646 Inst.setOpcode(ARM::RFEDA);
1648 case ARM::LDMDA_UPD:
1649 Inst.setOpcode(ARM::RFEDA_UPD);
1652 Inst.setOpcode(ARM::RFEDB);
1654 case ARM::LDMDB_UPD:
1655 Inst.setOpcode(ARM::RFEDB_UPD);
1658 Inst.setOpcode(ARM::RFEIA);
1660 case ARM::LDMIA_UPD:
1661 Inst.setOpcode(ARM::RFEIA_UPD);
1664 Inst.setOpcode(ARM::RFEIB);
1666 case ARM::LDMIB_UPD:
1667 Inst.setOpcode(ARM::RFEIB_UPD);
1670 Inst.setOpcode(ARM::SRSDA);
1672 case ARM::STMDA_UPD:
1673 Inst.setOpcode(ARM::SRSDA_UPD);
1676 Inst.setOpcode(ARM::SRSDB);
1678 case ARM::STMDB_UPD:
1679 Inst.setOpcode(ARM::SRSDB_UPD);
1682 Inst.setOpcode(ARM::SRSIA);
1684 case ARM::STMIA_UPD:
1685 Inst.setOpcode(ARM::SRSIA_UPD);
1688 Inst.setOpcode(ARM::SRSIB);
1690 case ARM::STMIB_UPD:
1691 Inst.setOpcode(ARM::SRSIB_UPD);
1694 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1697 // For stores (which become SRS's, the only operand is the mode.
1698 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1700 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1704 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1707 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1708 return MCDisassembler::Fail;
1709 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1710 return MCDisassembler::Fail; // Tied
1711 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1712 return MCDisassembler::Fail;
1713 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1714 return MCDisassembler::Fail;
1719 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1720 uint64_t Address, const void *Decoder) {
1721 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1722 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1723 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1724 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1726 DecodeStatus S = MCDisassembler::Success;
1728 // imod == '01' --> UNPREDICTABLE
1729 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1730 // return failure here. The '01' imod value is unprintable, so there's
1731 // nothing useful we could do even if we returned UNPREDICTABLE.
1733 if (imod == 1) return MCDisassembler::Fail;
1736 Inst.setOpcode(ARM::CPS3p);
1737 Inst.addOperand(MCOperand::CreateImm(imod));
1738 Inst.addOperand(MCOperand::CreateImm(iflags));
1739 Inst.addOperand(MCOperand::CreateImm(mode));
1740 } else if (imod && !M) {
1741 Inst.setOpcode(ARM::CPS2p);
1742 Inst.addOperand(MCOperand::CreateImm(imod));
1743 Inst.addOperand(MCOperand::CreateImm(iflags));
1744 if (mode) S = MCDisassembler::SoftFail;
1745 } else if (!imod && M) {
1746 Inst.setOpcode(ARM::CPS1p);
1747 Inst.addOperand(MCOperand::CreateImm(mode));
1748 if (iflags) S = MCDisassembler::SoftFail;
1750 // imod == '00' && M == '0' --> UNPREDICTABLE
1751 Inst.setOpcode(ARM::CPS1p);
1752 Inst.addOperand(MCOperand::CreateImm(mode));
1753 S = MCDisassembler::SoftFail;
1759 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1760 uint64_t Address, const void *Decoder) {
1761 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1762 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1763 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1764 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1766 DecodeStatus S = MCDisassembler::Success;
1768 // imod == '01' --> UNPREDICTABLE
1769 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1770 // return failure here. The '01' imod value is unprintable, so there's
1771 // nothing useful we could do even if we returned UNPREDICTABLE.
1773 if (imod == 1) return MCDisassembler::Fail;
1776 Inst.setOpcode(ARM::t2CPS3p);
1777 Inst.addOperand(MCOperand::CreateImm(imod));
1778 Inst.addOperand(MCOperand::CreateImm(iflags));
1779 Inst.addOperand(MCOperand::CreateImm(mode));
1780 } else if (imod && !M) {
1781 Inst.setOpcode(ARM::t2CPS2p);
1782 Inst.addOperand(MCOperand::CreateImm(imod));
1783 Inst.addOperand(MCOperand::CreateImm(iflags));
1784 if (mode) S = MCDisassembler::SoftFail;
1785 } else if (!imod && M) {
1786 Inst.setOpcode(ARM::t2CPS1p);
1787 Inst.addOperand(MCOperand::CreateImm(mode));
1788 if (iflags) S = MCDisassembler::SoftFail;
1790 // imod == '00' && M == '0' --> UNPREDICTABLE
1791 Inst.setOpcode(ARM::t2CPS1p);
1792 Inst.addOperand(MCOperand::CreateImm(mode));
1793 S = MCDisassembler::SoftFail;
1799 static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1800 uint64_t Address, const void *Decoder) {
1801 DecodeStatus S = MCDisassembler::Success;
1803 unsigned Rd = fieldFromInstruction32(Insn, 8, 4);
1806 imm |= (fieldFromInstruction32(Insn, 0, 8) << 0);
1807 imm |= (fieldFromInstruction32(Insn, 12, 3) << 8);
1808 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1809 imm |= (fieldFromInstruction32(Insn, 26, 1) << 11);
1811 if (Inst.getOpcode() == ARM::t2MOVTi16)
1812 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1813 return MCDisassembler::Fail;
1814 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1815 return MCDisassembler::Fail;
1817 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1818 Inst.addOperand(MCOperand::CreateImm(imm));
1823 static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1824 uint64_t Address, const void *Decoder) {
1825 DecodeStatus S = MCDisassembler::Success;
1827 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1828 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1831 imm |= (fieldFromInstruction32(Insn, 0, 12) << 0);
1832 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1834 if (Inst.getOpcode() == ARM::MOVTi16)
1835 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1836 return MCDisassembler::Fail;
1837 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1838 return MCDisassembler::Fail;
1840 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1841 Inst.addOperand(MCOperand::CreateImm(imm));
1843 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1844 return MCDisassembler::Fail;
1849 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1850 uint64_t Address, const void *Decoder) {
1851 DecodeStatus S = MCDisassembler::Success;
1853 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1854 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1855 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1856 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1857 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1860 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1862 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1863 return MCDisassembler::Fail;
1864 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1865 return MCDisassembler::Fail;
1866 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1867 return MCDisassembler::Fail;
1868 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1869 return MCDisassembler::Fail;
1871 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1872 return MCDisassembler::Fail;
1877 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1878 uint64_t Address, const void *Decoder) {
1879 DecodeStatus S = MCDisassembler::Success;
1881 unsigned add = fieldFromInstruction32(Val, 12, 1);
1882 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1883 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1885 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1886 return MCDisassembler::Fail;
1888 if (!add) imm *= -1;
1889 if (imm == 0 && !add) imm = INT32_MIN;
1890 Inst.addOperand(MCOperand::CreateImm(imm));
1892 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
1897 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1898 uint64_t Address, const void *Decoder) {
1899 DecodeStatus S = MCDisassembler::Success;
1901 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1902 unsigned U = fieldFromInstruction32(Val, 8, 1);
1903 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1905 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1906 return MCDisassembler::Fail;
1909 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1911 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1916 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1917 uint64_t Address, const void *Decoder) {
1918 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1922 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1923 uint64_t Address, const void *Decoder) {
1924 DecodeStatus S = MCDisassembler::Success;
1926 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1927 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1930 Inst.setOpcode(ARM::BLXi);
1931 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1932 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
1933 true, 4, Inst, Decoder))
1934 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1938 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
1939 true, 4, Inst, Decoder))
1940 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1941 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1942 return MCDisassembler::Fail;
1948 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1949 uint64_t Address, const void *Decoder) {
1950 DecodeStatus S = MCDisassembler::Success;
1952 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1953 unsigned align = fieldFromInstruction32(Val, 4, 2);
1955 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1956 return MCDisassembler::Fail;
1958 Inst.addOperand(MCOperand::CreateImm(0));
1960 Inst.addOperand(MCOperand::CreateImm(4 << align));
1965 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1966 uint64_t Address, const void *Decoder) {
1967 DecodeStatus S = MCDisassembler::Success;
1969 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1970 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1971 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1972 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1973 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1974 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1976 // First output register
1977 switch (Inst.getOpcode()) {
1982 case ARM::VLD1q16wb_fixed:
1983 case ARM::VLD1q16wb_register:
1984 case ARM::VLD1q32wb_fixed:
1985 case ARM::VLD1q32wb_register:
1986 case ARM::VLD1q64wb_fixed:
1987 case ARM::VLD1q64wb_register:
1988 case ARM::VLD1q8wb_fixed:
1989 case ARM::VLD1q8wb_register:
1993 case ARM::VLD2d16wb_fixed:
1994 case ARM::VLD2d16wb_register:
1995 case ARM::VLD2d32wb_fixed:
1996 case ARM::VLD2d32wb_register:
1997 case ARM::VLD2d8wb_fixed:
1998 case ARM::VLD2d8wb_register:
1999 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2000 return MCDisassembler::Fail;
2003 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2004 return MCDisassembler::Fail;
2007 // Second output register
2008 switch (Inst.getOpcode()) {
2012 case ARM::VLD3d8_UPD:
2013 case ARM::VLD3d16_UPD:
2014 case ARM::VLD3d32_UPD:
2018 case ARM::VLD4d8_UPD:
2019 case ARM::VLD4d16_UPD:
2020 case ARM::VLD4d32_UPD:
2021 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2022 return MCDisassembler::Fail;
2027 case ARM::VLD3q8_UPD:
2028 case ARM::VLD3q16_UPD:
2029 case ARM::VLD3q32_UPD:
2033 case ARM::VLD4q8_UPD:
2034 case ARM::VLD4q16_UPD:
2035 case ARM::VLD4q32_UPD:
2036 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2037 return MCDisassembler::Fail;
2042 // Third output register
2043 switch(Inst.getOpcode()) {
2047 case ARM::VLD3d8_UPD:
2048 case ARM::VLD3d16_UPD:
2049 case ARM::VLD3d32_UPD:
2053 case ARM::VLD4d8_UPD:
2054 case ARM::VLD4d16_UPD:
2055 case ARM::VLD4d32_UPD:
2056 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2057 return MCDisassembler::Fail;
2062 case ARM::VLD3q8_UPD:
2063 case ARM::VLD3q16_UPD:
2064 case ARM::VLD3q32_UPD:
2068 case ARM::VLD4q8_UPD:
2069 case ARM::VLD4q16_UPD:
2070 case ARM::VLD4q32_UPD:
2071 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2072 return MCDisassembler::Fail;
2078 // Fourth output register
2079 switch (Inst.getOpcode()) {
2083 case ARM::VLD4d8_UPD:
2084 case ARM::VLD4d16_UPD:
2085 case ARM::VLD4d32_UPD:
2086 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2087 return MCDisassembler::Fail;
2092 case ARM::VLD4q8_UPD:
2093 case ARM::VLD4q16_UPD:
2094 case ARM::VLD4q32_UPD:
2095 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2096 return MCDisassembler::Fail;
2102 // Writeback operand
2103 switch (Inst.getOpcode()) {
2104 case ARM::VLD1d8wb_fixed:
2105 case ARM::VLD1d16wb_fixed:
2106 case ARM::VLD1d32wb_fixed:
2107 case ARM::VLD1d64wb_fixed:
2108 case ARM::VLD1d8wb_register:
2109 case ARM::VLD1d16wb_register:
2110 case ARM::VLD1d32wb_register:
2111 case ARM::VLD1d64wb_register:
2112 case ARM::VLD1q8wb_fixed:
2113 case ARM::VLD1q16wb_fixed:
2114 case ARM::VLD1q32wb_fixed:
2115 case ARM::VLD1q64wb_fixed:
2116 case ARM::VLD1q8wb_register:
2117 case ARM::VLD1q16wb_register:
2118 case ARM::VLD1q32wb_register:
2119 case ARM::VLD1q64wb_register:
2120 case ARM::VLD1d8Twb_fixed:
2121 case ARM::VLD1d8Twb_register:
2122 case ARM::VLD1d16Twb_fixed:
2123 case ARM::VLD1d16Twb_register:
2124 case ARM::VLD1d32Twb_fixed:
2125 case ARM::VLD1d32Twb_register:
2126 case ARM::VLD1d64Twb_fixed:
2127 case ARM::VLD1d64Twb_register:
2128 case ARM::VLD1d8Qwb_fixed:
2129 case ARM::VLD1d8Qwb_register:
2130 case ARM::VLD1d16Qwb_fixed:
2131 case ARM::VLD1d16Qwb_register:
2132 case ARM::VLD1d32Qwb_fixed:
2133 case ARM::VLD1d32Qwb_register:
2134 case ARM::VLD1d64Qwb_fixed:
2135 case ARM::VLD1d64Qwb_register:
2136 case ARM::VLD2d8wb_fixed:
2137 case ARM::VLD2d16wb_fixed:
2138 case ARM::VLD2d32wb_fixed:
2139 case ARM::VLD2q8wb_fixed:
2140 case ARM::VLD2q16wb_fixed:
2141 case ARM::VLD2q32wb_fixed:
2142 case ARM::VLD2d8wb_register:
2143 case ARM::VLD2d16wb_register:
2144 case ARM::VLD2d32wb_register:
2145 case ARM::VLD2q8wb_register:
2146 case ARM::VLD2q16wb_register:
2147 case ARM::VLD2q32wb_register:
2148 case ARM::VLD2b8wb_fixed:
2149 case ARM::VLD2b16wb_fixed:
2150 case ARM::VLD2b32wb_fixed:
2151 case ARM::VLD2b8wb_register:
2152 case ARM::VLD2b16wb_register:
2153 case ARM::VLD2b32wb_register:
2154 case ARM::VLD3d8_UPD:
2155 case ARM::VLD3d16_UPD:
2156 case ARM::VLD3d32_UPD:
2157 case ARM::VLD3q8_UPD:
2158 case ARM::VLD3q16_UPD:
2159 case ARM::VLD3q32_UPD:
2160 case ARM::VLD4d8_UPD:
2161 case ARM::VLD4d16_UPD:
2162 case ARM::VLD4d32_UPD:
2163 case ARM::VLD4q8_UPD:
2164 case ARM::VLD4q16_UPD:
2165 case ARM::VLD4q32_UPD:
2166 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2167 return MCDisassembler::Fail;
2173 // AddrMode6 Base (register+alignment)
2174 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2175 return MCDisassembler::Fail;
2177 // AddrMode6 Offset (register)
2178 switch (Inst.getOpcode()) {
2180 // The below have been updated to have explicit am6offset split
2181 // between fixed and register offset. For those instructions not
2182 // yet updated, we need to add an additional reg0 operand for the
2185 // The fixed offset encodes as Rm == 0xd, so we check for that.
2187 Inst.addOperand(MCOperand::CreateReg(0));
2190 // Fall through to handle the register offset variant.
2191 case ARM::VLD1d8wb_fixed:
2192 case ARM::VLD1d16wb_fixed:
2193 case ARM::VLD1d32wb_fixed:
2194 case ARM::VLD1d64wb_fixed:
2195 case ARM::VLD1d8Twb_fixed:
2196 case ARM::VLD1d16Twb_fixed:
2197 case ARM::VLD1d32Twb_fixed:
2198 case ARM::VLD1d64Twb_fixed:
2199 case ARM::VLD1d8Qwb_fixed:
2200 case ARM::VLD1d16Qwb_fixed:
2201 case ARM::VLD1d32Qwb_fixed:
2202 case ARM::VLD1d64Qwb_fixed:
2203 case ARM::VLD1d8wb_register:
2204 case ARM::VLD1d16wb_register:
2205 case ARM::VLD1d32wb_register:
2206 case ARM::VLD1d64wb_register:
2207 case ARM::VLD1q8wb_fixed:
2208 case ARM::VLD1q16wb_fixed:
2209 case ARM::VLD1q32wb_fixed:
2210 case ARM::VLD1q64wb_fixed:
2211 case ARM::VLD1q8wb_register:
2212 case ARM::VLD1q16wb_register:
2213 case ARM::VLD1q32wb_register:
2214 case ARM::VLD1q64wb_register:
2215 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2216 // variant encodes Rm == 0xf. Anything else is a register offset post-
2217 // increment and we need to add the register operand to the instruction.
2218 if (Rm != 0xD && Rm != 0xF &&
2219 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2220 return MCDisassembler::Fail;
2227 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
2228 uint64_t Address, const void *Decoder) {
2229 DecodeStatus S = MCDisassembler::Success;
2231 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2232 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2233 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
2234 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2235 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2236 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2238 // Writeback Operand
2239 switch (Inst.getOpcode()) {
2240 case ARM::VST1d8wb_fixed:
2241 case ARM::VST1d16wb_fixed:
2242 case ARM::VST1d32wb_fixed:
2243 case ARM::VST1d64wb_fixed:
2244 case ARM::VST1d8wb_register:
2245 case ARM::VST1d16wb_register:
2246 case ARM::VST1d32wb_register:
2247 case ARM::VST1d64wb_register:
2248 case ARM::VST1q8wb_fixed:
2249 case ARM::VST1q16wb_fixed:
2250 case ARM::VST1q32wb_fixed:
2251 case ARM::VST1q64wb_fixed:
2252 case ARM::VST1q8wb_register:
2253 case ARM::VST1q16wb_register:
2254 case ARM::VST1q32wb_register:
2255 case ARM::VST1q64wb_register:
2256 case ARM::VST1d8Twb_fixed:
2257 case ARM::VST1d16Twb_fixed:
2258 case ARM::VST1d32Twb_fixed:
2259 case ARM::VST1d64Twb_fixed:
2260 case ARM::VST1d8Twb_register:
2261 case ARM::VST1d16Twb_register:
2262 case ARM::VST1d32Twb_register:
2263 case ARM::VST1d64Twb_register:
2264 case ARM::VST1d8Qwb_fixed:
2265 case ARM::VST1d16Qwb_fixed:
2266 case ARM::VST1d32Qwb_fixed:
2267 case ARM::VST1d64Qwb_fixed:
2268 case ARM::VST1d8Qwb_register:
2269 case ARM::VST1d16Qwb_register:
2270 case ARM::VST1d32Qwb_register:
2271 case ARM::VST1d64Qwb_register:
2272 case ARM::VST2d8wb_fixed:
2273 case ARM::VST2d16wb_fixed:
2274 case ARM::VST2d32wb_fixed:
2275 case ARM::VST2d8wb_register:
2276 case ARM::VST2d16wb_register:
2277 case ARM::VST2d32wb_register:
2278 case ARM::VST2q8wb_fixed:
2279 case ARM::VST2q16wb_fixed:
2280 case ARM::VST2q32wb_fixed:
2281 case ARM::VST2q8wb_register:
2282 case ARM::VST2q16wb_register:
2283 case ARM::VST2q32wb_register:
2284 case ARM::VST2b8wb_fixed:
2285 case ARM::VST2b16wb_fixed:
2286 case ARM::VST2b32wb_fixed:
2287 case ARM::VST2b8wb_register:
2288 case ARM::VST2b16wb_register:
2289 case ARM::VST2b32wb_register:
2290 case ARM::VST3d8_UPD:
2291 case ARM::VST3d16_UPD:
2292 case ARM::VST3d32_UPD:
2293 case ARM::VST3q8_UPD:
2294 case ARM::VST3q16_UPD:
2295 case ARM::VST3q32_UPD:
2296 case ARM::VST4d8_UPD:
2297 case ARM::VST4d16_UPD:
2298 case ARM::VST4d32_UPD:
2299 case ARM::VST4q8_UPD:
2300 case ARM::VST4q16_UPD:
2301 case ARM::VST4q32_UPD:
2302 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2303 return MCDisassembler::Fail;
2309 // AddrMode6 Base (register+alignment)
2310 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2311 return MCDisassembler::Fail;
2313 // AddrMode6 Offset (register)
2314 switch (Inst.getOpcode()) {
2317 Inst.addOperand(MCOperand::CreateReg(0));
2318 else if (Rm != 0xF) {
2319 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2320 return MCDisassembler::Fail;
2323 case ARM::VST1d8wb_fixed:
2324 case ARM::VST1d16wb_fixed:
2325 case ARM::VST1d32wb_fixed:
2326 case ARM::VST1d64wb_fixed:
2327 case ARM::VST1q8wb_fixed:
2328 case ARM::VST1q16wb_fixed:
2329 case ARM::VST1q32wb_fixed:
2330 case ARM::VST1q64wb_fixed:
2335 // First input register
2336 switch (Inst.getOpcode()) {
2341 case ARM::VST1q16wb_fixed:
2342 case ARM::VST1q16wb_register:
2343 case ARM::VST1q32wb_fixed:
2344 case ARM::VST1q32wb_register:
2345 case ARM::VST1q64wb_fixed:
2346 case ARM::VST1q64wb_register:
2347 case ARM::VST1q8wb_fixed:
2348 case ARM::VST1q8wb_register:
2352 case ARM::VST2d16wb_fixed:
2353 case ARM::VST2d16wb_register:
2354 case ARM::VST2d32wb_fixed:
2355 case ARM::VST2d32wb_register:
2356 case ARM::VST2d8wb_fixed:
2357 case ARM::VST2d8wb_register:
2358 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2359 return MCDisassembler::Fail;
2362 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2363 return MCDisassembler::Fail;
2366 // Second input register
2367 switch (Inst.getOpcode()) {
2371 case ARM::VST3d8_UPD:
2372 case ARM::VST3d16_UPD:
2373 case ARM::VST3d32_UPD:
2377 case ARM::VST4d8_UPD:
2378 case ARM::VST4d16_UPD:
2379 case ARM::VST4d32_UPD:
2380 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2381 return MCDisassembler::Fail;
2386 case ARM::VST3q8_UPD:
2387 case ARM::VST3q16_UPD:
2388 case ARM::VST3q32_UPD:
2392 case ARM::VST4q8_UPD:
2393 case ARM::VST4q16_UPD:
2394 case ARM::VST4q32_UPD:
2395 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2396 return MCDisassembler::Fail;
2402 // Third input register
2403 switch (Inst.getOpcode()) {
2407 case ARM::VST3d8_UPD:
2408 case ARM::VST3d16_UPD:
2409 case ARM::VST3d32_UPD:
2413 case ARM::VST4d8_UPD:
2414 case ARM::VST4d16_UPD:
2415 case ARM::VST4d32_UPD:
2416 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2417 return MCDisassembler::Fail;
2422 case ARM::VST3q8_UPD:
2423 case ARM::VST3q16_UPD:
2424 case ARM::VST3q32_UPD:
2428 case ARM::VST4q8_UPD:
2429 case ARM::VST4q16_UPD:
2430 case ARM::VST4q32_UPD:
2431 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2432 return MCDisassembler::Fail;
2438 // Fourth input register
2439 switch (Inst.getOpcode()) {
2443 case ARM::VST4d8_UPD:
2444 case ARM::VST4d16_UPD:
2445 case ARM::VST4d32_UPD:
2446 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2447 return MCDisassembler::Fail;
2452 case ARM::VST4q8_UPD:
2453 case ARM::VST4q16_UPD:
2454 case ARM::VST4q32_UPD:
2455 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2456 return MCDisassembler::Fail;
2465 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2466 uint64_t Address, const void *Decoder) {
2467 DecodeStatus S = MCDisassembler::Success;
2469 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2470 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2471 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2472 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2473 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2474 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2476 align *= (1 << size);
2478 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2479 return MCDisassembler::Fail;
2481 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2482 return MCDisassembler::Fail;
2485 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2486 return MCDisassembler::Fail;
2487 Inst.addOperand(MCOperand::CreateImm(align));
2489 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2490 // variant encodes Rm == 0xf. Anything else is a register offset post-
2491 // increment and we need to add the register operand to the instruction.
2492 if (Rm != 0xD && Rm != 0xF &&
2493 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2494 return MCDisassembler::Fail;
2499 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2500 uint64_t Address, const void *Decoder) {
2501 DecodeStatus S = MCDisassembler::Success;
2503 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2504 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2505 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2506 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2507 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2508 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2509 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2512 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2513 return MCDisassembler::Fail;
2514 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2515 return MCDisassembler::Fail;
2517 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2518 return MCDisassembler::Fail;
2521 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2522 return MCDisassembler::Fail;
2523 Inst.addOperand(MCOperand::CreateImm(align));
2526 Inst.addOperand(MCOperand::CreateReg(0));
2527 else if (Rm != 0xF) {
2528 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2529 return MCDisassembler::Fail;
2535 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2536 uint64_t Address, const void *Decoder) {
2537 DecodeStatus S = MCDisassembler::Success;
2539 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2540 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2541 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2542 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2543 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2545 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2546 return MCDisassembler::Fail;
2547 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2548 return MCDisassembler::Fail;
2549 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2550 return MCDisassembler::Fail;
2552 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2553 return MCDisassembler::Fail;
2556 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2557 return MCDisassembler::Fail;
2558 Inst.addOperand(MCOperand::CreateImm(0));
2561 Inst.addOperand(MCOperand::CreateReg(0));
2562 else if (Rm != 0xF) {
2563 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2564 return MCDisassembler::Fail;
2570 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2571 uint64_t Address, const void *Decoder) {
2572 DecodeStatus S = MCDisassembler::Success;
2574 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2575 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2576 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2577 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2578 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2579 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2580 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2595 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2596 return MCDisassembler::Fail;
2597 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2598 return MCDisassembler::Fail;
2599 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2600 return MCDisassembler::Fail;
2601 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2602 return MCDisassembler::Fail;
2604 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2605 return MCDisassembler::Fail;
2608 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2609 return MCDisassembler::Fail;
2610 Inst.addOperand(MCOperand::CreateImm(align));
2613 Inst.addOperand(MCOperand::CreateReg(0));
2614 else if (Rm != 0xF) {
2615 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2616 return MCDisassembler::Fail;
2623 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2624 uint64_t Address, const void *Decoder) {
2625 DecodeStatus S = MCDisassembler::Success;
2627 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2628 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2629 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2630 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2631 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2632 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2633 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2634 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2637 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2638 return MCDisassembler::Fail;
2640 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2641 return MCDisassembler::Fail;
2644 Inst.addOperand(MCOperand::CreateImm(imm));
2646 switch (Inst.getOpcode()) {
2647 case ARM::VORRiv4i16:
2648 case ARM::VORRiv2i32:
2649 case ARM::VBICiv4i16:
2650 case ARM::VBICiv2i32:
2651 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2652 return MCDisassembler::Fail;
2654 case ARM::VORRiv8i16:
2655 case ARM::VORRiv4i32:
2656 case ARM::VBICiv8i16:
2657 case ARM::VBICiv4i32:
2658 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2659 return MCDisassembler::Fail;
2668 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2669 uint64_t Address, const void *Decoder) {
2670 DecodeStatus S = MCDisassembler::Success;
2672 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2673 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2674 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2675 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2676 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2678 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2679 return MCDisassembler::Fail;
2680 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2681 return MCDisassembler::Fail;
2682 Inst.addOperand(MCOperand::CreateImm(8 << size));
2687 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2688 uint64_t Address, const void *Decoder) {
2689 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2690 return MCDisassembler::Success;
2693 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2694 uint64_t Address, const void *Decoder) {
2695 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2696 return MCDisassembler::Success;
2699 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2700 uint64_t Address, const void *Decoder) {
2701 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2702 return MCDisassembler::Success;
2705 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2706 uint64_t Address, const void *Decoder) {
2707 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2708 return MCDisassembler::Success;
2711 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2712 uint64_t Address, const void *Decoder) {
2713 DecodeStatus S = MCDisassembler::Success;
2715 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2716 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2717 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2718 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2719 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2720 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2721 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2723 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2724 return MCDisassembler::Fail;
2726 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2727 return MCDisassembler::Fail; // Writeback
2730 switch (Inst.getOpcode()) {
2733 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
2734 return MCDisassembler::Fail;
2737 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
2738 return MCDisassembler::Fail;
2741 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2742 return MCDisassembler::Fail;
2747 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2748 uint64_t Address, const void *Decoder) {
2749 DecodeStatus S = MCDisassembler::Success;
2751 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2752 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2754 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2755 return MCDisassembler::Fail;
2757 switch(Inst.getOpcode()) {
2759 return MCDisassembler::Fail;
2761 break; // tADR does not explicitly represent the PC as an operand.
2763 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2767 Inst.addOperand(MCOperand::CreateImm(imm));
2771 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2772 uint64_t Address, const void *Decoder) {
2773 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2774 return MCDisassembler::Success;
2777 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2778 uint64_t Address, const void *Decoder) {
2779 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2780 return MCDisassembler::Success;
2783 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2784 uint64_t Address, const void *Decoder) {
2785 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2786 return MCDisassembler::Success;
2789 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2790 uint64_t Address, const void *Decoder) {
2791 DecodeStatus S = MCDisassembler::Success;
2793 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2794 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2796 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2797 return MCDisassembler::Fail;
2798 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2799 return MCDisassembler::Fail;
2804 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2805 uint64_t Address, const void *Decoder) {
2806 DecodeStatus S = MCDisassembler::Success;
2808 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2809 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2811 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2812 return MCDisassembler::Fail;
2813 Inst.addOperand(MCOperand::CreateImm(imm));
2818 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2819 uint64_t Address, const void *Decoder) {
2820 unsigned imm = Val << 2;
2822 Inst.addOperand(MCOperand::CreateImm(imm));
2823 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
2825 return MCDisassembler::Success;
2828 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2829 uint64_t Address, const void *Decoder) {
2830 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2831 Inst.addOperand(MCOperand::CreateImm(Val));
2833 return MCDisassembler::Success;
2836 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2837 uint64_t Address, const void *Decoder) {
2838 DecodeStatus S = MCDisassembler::Success;
2840 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2841 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2842 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2844 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2845 return MCDisassembler::Fail;
2846 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2847 return MCDisassembler::Fail;
2848 Inst.addOperand(MCOperand::CreateImm(imm));
2853 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2854 uint64_t Address, const void *Decoder) {
2855 DecodeStatus S = MCDisassembler::Success;
2857 switch (Inst.getOpcode()) {
2863 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2864 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2865 return MCDisassembler::Fail;
2869 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2871 switch (Inst.getOpcode()) {
2873 Inst.setOpcode(ARM::t2LDRBpci);
2876 Inst.setOpcode(ARM::t2LDRHpci);
2879 Inst.setOpcode(ARM::t2LDRSHpci);
2882 Inst.setOpcode(ARM::t2LDRSBpci);
2885 Inst.setOpcode(ARM::t2PLDi12);
2886 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2889 return MCDisassembler::Fail;
2892 int imm = fieldFromInstruction32(Insn, 0, 12);
2893 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2894 Inst.addOperand(MCOperand::CreateImm(imm));
2899 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2900 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2901 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2902 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2903 return MCDisassembler::Fail;
2908 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2909 uint64_t Address, const void *Decoder) {
2910 int imm = Val & 0xFF;
2911 if (!(Val & 0x100)) imm *= -1;
2912 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2914 return MCDisassembler::Success;
2917 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2918 uint64_t Address, const void *Decoder) {
2919 DecodeStatus S = MCDisassembler::Success;
2921 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2922 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2924 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2925 return MCDisassembler::Fail;
2926 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2927 return MCDisassembler::Fail;
2932 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
2933 uint64_t Address, const void *Decoder) {
2934 DecodeStatus S = MCDisassembler::Success;
2936 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
2937 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2939 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2940 return MCDisassembler::Fail;
2942 Inst.addOperand(MCOperand::CreateImm(imm));
2947 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2948 uint64_t Address, const void *Decoder) {
2949 int imm = Val & 0xFF;
2952 else if (!(Val & 0x100))
2954 Inst.addOperand(MCOperand::CreateImm(imm));
2956 return MCDisassembler::Success;
2960 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2961 uint64_t Address, const void *Decoder) {
2962 DecodeStatus S = MCDisassembler::Success;
2964 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2965 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2967 // Some instructions always use an additive offset.
2968 switch (Inst.getOpcode()) {
2983 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2984 return MCDisassembler::Fail;
2985 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2986 return MCDisassembler::Fail;
2991 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn,
2992 uint64_t Address, const void *Decoder) {
2993 DecodeStatus S = MCDisassembler::Success;
2995 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2996 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2997 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
2998 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
3000 unsigned load = fieldFromInstruction32(Insn, 20, 1);
3003 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3004 return MCDisassembler::Fail;
3007 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3008 return MCDisassembler::Fail;
3011 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3012 return MCDisassembler::Fail;
3015 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3016 return MCDisassembler::Fail;
3021 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
3022 uint64_t Address, const void *Decoder) {
3023 DecodeStatus S = MCDisassembler::Success;
3025 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
3026 unsigned imm = fieldFromInstruction32(Val, 0, 12);
3028 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3029 return MCDisassembler::Fail;
3030 Inst.addOperand(MCOperand::CreateImm(imm));
3036 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
3037 uint64_t Address, const void *Decoder) {
3038 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
3040 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3041 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3042 Inst.addOperand(MCOperand::CreateImm(imm));
3044 return MCDisassembler::Success;
3047 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
3048 uint64_t Address, const void *Decoder) {
3049 DecodeStatus S = MCDisassembler::Success;
3051 if (Inst.getOpcode() == ARM::tADDrSP) {
3052 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
3053 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
3055 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3056 return MCDisassembler::Fail;
3057 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3058 return MCDisassembler::Fail;
3059 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3060 } else if (Inst.getOpcode() == ARM::tADDspr) {
3061 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
3063 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3064 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3065 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3066 return MCDisassembler::Fail;
3072 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
3073 uint64_t Address, const void *Decoder) {
3074 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
3075 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
3077 Inst.addOperand(MCOperand::CreateImm(imod));
3078 Inst.addOperand(MCOperand::CreateImm(flags));
3080 return MCDisassembler::Success;
3083 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
3084 uint64_t Address, const void *Decoder) {
3085 DecodeStatus S = MCDisassembler::Success;
3086 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3087 unsigned add = fieldFromInstruction32(Insn, 4, 1);
3089 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3090 return MCDisassembler::Fail;
3091 Inst.addOperand(MCOperand::CreateImm(add));
3096 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
3097 uint64_t Address, const void *Decoder) {
3098 if (!tryAddingSymbolicOperand(Address,
3099 (Address & ~2u) + SignExtend32<22>(Val << 1) + 4,
3100 true, 4, Inst, Decoder))
3101 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3102 return MCDisassembler::Success;
3105 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
3106 uint64_t Address, const void *Decoder) {
3107 if (Val == 0xA || Val == 0xB)
3108 return MCDisassembler::Fail;
3110 Inst.addOperand(MCOperand::CreateImm(Val));
3111 return MCDisassembler::Success;
3115 DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Insn,
3116 uint64_t Address, const void *Decoder) {
3117 DecodeStatus S = MCDisassembler::Success;
3119 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3120 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3122 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3123 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3124 return MCDisassembler::Fail;
3125 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3126 return MCDisassembler::Fail;
3131 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
3132 uint64_t Address, const void *Decoder) {
3133 DecodeStatus S = MCDisassembler::Success;
3135 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
3136 if (pred == 0xE || pred == 0xF) {
3137 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
3140 return MCDisassembler::Fail;
3142 Inst.setOpcode(ARM::t2DSB);
3145 Inst.setOpcode(ARM::t2DMB);
3148 Inst.setOpcode(ARM::t2ISB);
3152 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
3153 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3156 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
3157 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
3158 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
3159 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
3160 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
3162 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3163 return MCDisassembler::Fail;
3164 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3165 return MCDisassembler::Fail;
3170 // Decode a shifted immediate operand. These basically consist
3171 // of an 8-bit value, and a 4-bit directive that specifies either
3172 // a splat operation or a rotation.
3173 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
3174 uint64_t Address, const void *Decoder) {
3175 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
3177 unsigned byte = fieldFromInstruction32(Val, 8, 2);
3178 unsigned imm = fieldFromInstruction32(Val, 0, 8);
3181 Inst.addOperand(MCOperand::CreateImm(imm));
3184 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3187 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3190 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3195 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
3196 unsigned rot = fieldFromInstruction32(Val, 7, 5);
3197 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3198 Inst.addOperand(MCOperand::CreateImm(imm));
3201 return MCDisassembler::Success;
3205 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
3206 uint64_t Address, const void *Decoder){
3207 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3208 return MCDisassembler::Success;
3211 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
3212 uint64_t Address, const void *Decoder){
3213 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<22>(Val<<1) + 4,
3214 true, 4, Inst, Decoder))
3215 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3216 return MCDisassembler::Success;
3219 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
3220 uint64_t Address, const void *Decoder) {
3223 return MCDisassembler::Fail;
3235 Inst.addOperand(MCOperand::CreateImm(Val));
3236 return MCDisassembler::Success;
3239 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
3240 uint64_t Address, const void *Decoder) {
3241 if (!Val) return MCDisassembler::Fail;
3242 Inst.addOperand(MCOperand::CreateImm(Val));
3243 return MCDisassembler::Success;
3246 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
3247 uint64_t Address, const void *Decoder) {
3248 DecodeStatus S = MCDisassembler::Success;
3250 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3251 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3252 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3254 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3256 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3257 return MCDisassembler::Fail;
3258 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3259 return MCDisassembler::Fail;
3260 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3261 return MCDisassembler::Fail;
3262 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3263 return MCDisassembler::Fail;
3269 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
3270 uint64_t Address, const void *Decoder){
3271 DecodeStatus S = MCDisassembler::Success;
3273 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3274 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3275 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3276 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3278 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3279 return MCDisassembler::Fail;
3281 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3282 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3284 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3285 return MCDisassembler::Fail;
3286 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3287 return MCDisassembler::Fail;
3288 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3289 return MCDisassembler::Fail;
3290 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3291 return MCDisassembler::Fail;
3296 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
3297 uint64_t Address, const void *Decoder) {
3298 DecodeStatus S = MCDisassembler::Success;
3300 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3301 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3302 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3303 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3304 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3305 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3307 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3309 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3310 return MCDisassembler::Fail;
3311 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3312 return MCDisassembler::Fail;
3313 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3314 return MCDisassembler::Fail;
3315 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3316 return MCDisassembler::Fail;
3321 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
3322 uint64_t Address, const void *Decoder) {
3323 DecodeStatus S = MCDisassembler::Success;
3325 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3326 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3327 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3328 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3329 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3330 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3331 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3333 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3334 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3336 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3337 return MCDisassembler::Fail;
3338 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3339 return MCDisassembler::Fail;
3340 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3341 return MCDisassembler::Fail;
3342 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3343 return MCDisassembler::Fail;
3349 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3350 uint64_t Address, const void *Decoder) {
3351 DecodeStatus S = MCDisassembler::Success;
3353 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3354 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3355 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3356 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3357 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3358 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3360 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3362 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3363 return MCDisassembler::Fail;
3364 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3365 return MCDisassembler::Fail;
3366 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3367 return MCDisassembler::Fail;
3368 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3369 return MCDisassembler::Fail;
3374 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3375 uint64_t Address, const void *Decoder) {
3376 DecodeStatus S = MCDisassembler::Success;
3378 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3379 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3380 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3381 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3382 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3383 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3385 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3387 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3388 return MCDisassembler::Fail;
3389 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3390 return MCDisassembler::Fail;
3391 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3392 return MCDisassembler::Fail;
3393 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3394 return MCDisassembler::Fail;
3399 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3400 uint64_t Address, const void *Decoder) {
3401 DecodeStatus S = MCDisassembler::Success;
3403 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3404 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3405 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3406 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3407 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3413 return MCDisassembler::Fail;
3415 if (fieldFromInstruction32(Insn, 4, 1))
3416 return MCDisassembler::Fail; // UNDEFINED
3417 index = fieldFromInstruction32(Insn, 5, 3);
3420 if (fieldFromInstruction32(Insn, 5, 1))
3421 return MCDisassembler::Fail; // UNDEFINED
3422 index = fieldFromInstruction32(Insn, 6, 2);
3423 if (fieldFromInstruction32(Insn, 4, 1))
3427 if (fieldFromInstruction32(Insn, 6, 1))
3428 return MCDisassembler::Fail; // UNDEFINED
3429 index = fieldFromInstruction32(Insn, 7, 1);
3430 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3434 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3435 return MCDisassembler::Fail;
3436 if (Rm != 0xF) { // Writeback
3437 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3438 return MCDisassembler::Fail;
3440 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3441 return MCDisassembler::Fail;
3442 Inst.addOperand(MCOperand::CreateImm(align));
3445 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3446 return MCDisassembler::Fail;
3448 Inst.addOperand(MCOperand::CreateReg(0));
3451 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3452 return MCDisassembler::Fail;
3453 Inst.addOperand(MCOperand::CreateImm(index));
3458 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3459 uint64_t Address, const void *Decoder) {
3460 DecodeStatus S = MCDisassembler::Success;
3462 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3463 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3464 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3465 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3466 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3472 return MCDisassembler::Fail;
3474 if (fieldFromInstruction32(Insn, 4, 1))
3475 return MCDisassembler::Fail; // UNDEFINED
3476 index = fieldFromInstruction32(Insn, 5, 3);
3479 if (fieldFromInstruction32(Insn, 5, 1))
3480 return MCDisassembler::Fail; // UNDEFINED
3481 index = fieldFromInstruction32(Insn, 6, 2);
3482 if (fieldFromInstruction32(Insn, 4, 1))
3486 if (fieldFromInstruction32(Insn, 6, 1))
3487 return MCDisassembler::Fail; // UNDEFINED
3488 index = fieldFromInstruction32(Insn, 7, 1);
3489 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3493 if (Rm != 0xF) { // Writeback
3494 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3495 return MCDisassembler::Fail;
3497 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3498 return MCDisassembler::Fail;
3499 Inst.addOperand(MCOperand::CreateImm(align));
3502 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3503 return MCDisassembler::Fail;
3505 Inst.addOperand(MCOperand::CreateReg(0));
3508 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3509 return MCDisassembler::Fail;
3510 Inst.addOperand(MCOperand::CreateImm(index));
3516 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3517 uint64_t Address, const void *Decoder) {
3518 DecodeStatus S = MCDisassembler::Success;
3520 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3521 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3522 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3523 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3524 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3531 return MCDisassembler::Fail;
3533 index = fieldFromInstruction32(Insn, 5, 3);
3534 if (fieldFromInstruction32(Insn, 4, 1))
3538 index = fieldFromInstruction32(Insn, 6, 2);
3539 if (fieldFromInstruction32(Insn, 4, 1))
3541 if (fieldFromInstruction32(Insn, 5, 1))
3545 if (fieldFromInstruction32(Insn, 5, 1))
3546 return MCDisassembler::Fail; // UNDEFINED
3547 index = fieldFromInstruction32(Insn, 7, 1);
3548 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3550 if (fieldFromInstruction32(Insn, 6, 1))
3555 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3556 return MCDisassembler::Fail;
3557 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3558 return MCDisassembler::Fail;
3559 if (Rm != 0xF) { // Writeback
3560 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3561 return MCDisassembler::Fail;
3563 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3564 return MCDisassembler::Fail;
3565 Inst.addOperand(MCOperand::CreateImm(align));
3568 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3569 return MCDisassembler::Fail;
3571 Inst.addOperand(MCOperand::CreateReg(0));
3574 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3575 return MCDisassembler::Fail;
3576 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3577 return MCDisassembler::Fail;
3578 Inst.addOperand(MCOperand::CreateImm(index));
3583 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3584 uint64_t Address, const void *Decoder) {
3585 DecodeStatus S = MCDisassembler::Success;
3587 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3588 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3589 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3590 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3591 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3598 return MCDisassembler::Fail;
3600 index = fieldFromInstruction32(Insn, 5, 3);
3601 if (fieldFromInstruction32(Insn, 4, 1))
3605 index = fieldFromInstruction32(Insn, 6, 2);
3606 if (fieldFromInstruction32(Insn, 4, 1))
3608 if (fieldFromInstruction32(Insn, 5, 1))
3612 if (fieldFromInstruction32(Insn, 5, 1))
3613 return MCDisassembler::Fail; // UNDEFINED
3614 index = fieldFromInstruction32(Insn, 7, 1);
3615 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3617 if (fieldFromInstruction32(Insn, 6, 1))
3622 if (Rm != 0xF) { // Writeback
3623 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3624 return MCDisassembler::Fail;
3626 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3627 return MCDisassembler::Fail;
3628 Inst.addOperand(MCOperand::CreateImm(align));
3631 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3632 return MCDisassembler::Fail;
3634 Inst.addOperand(MCOperand::CreateReg(0));
3637 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3638 return MCDisassembler::Fail;
3639 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3640 return MCDisassembler::Fail;
3641 Inst.addOperand(MCOperand::CreateImm(index));
3647 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3648 uint64_t Address, const void *Decoder) {
3649 DecodeStatus S = MCDisassembler::Success;
3651 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3652 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3653 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3654 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3655 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3662 return MCDisassembler::Fail;
3664 if (fieldFromInstruction32(Insn, 4, 1))
3665 return MCDisassembler::Fail; // UNDEFINED
3666 index = fieldFromInstruction32(Insn, 5, 3);
3669 if (fieldFromInstruction32(Insn, 4, 1))
3670 return MCDisassembler::Fail; // UNDEFINED
3671 index = fieldFromInstruction32(Insn, 6, 2);
3672 if (fieldFromInstruction32(Insn, 5, 1))
3676 if (fieldFromInstruction32(Insn, 4, 2))
3677 return MCDisassembler::Fail; // UNDEFINED
3678 index = fieldFromInstruction32(Insn, 7, 1);
3679 if (fieldFromInstruction32(Insn, 6, 1))
3684 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3685 return MCDisassembler::Fail;
3686 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3687 return MCDisassembler::Fail;
3688 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3689 return MCDisassembler::Fail;
3691 if (Rm != 0xF) { // Writeback
3692 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3693 return MCDisassembler::Fail;
3695 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3696 return MCDisassembler::Fail;
3697 Inst.addOperand(MCOperand::CreateImm(align));
3700 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3701 return MCDisassembler::Fail;
3703 Inst.addOperand(MCOperand::CreateReg(0));
3706 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3707 return MCDisassembler::Fail;
3708 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3709 return MCDisassembler::Fail;
3710 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3711 return MCDisassembler::Fail;
3712 Inst.addOperand(MCOperand::CreateImm(index));
3717 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3718 uint64_t Address, const void *Decoder) {
3719 DecodeStatus S = MCDisassembler::Success;
3721 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3722 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3723 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3724 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3725 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3732 return MCDisassembler::Fail;
3734 if (fieldFromInstruction32(Insn, 4, 1))
3735 return MCDisassembler::Fail; // UNDEFINED
3736 index = fieldFromInstruction32(Insn, 5, 3);
3739 if (fieldFromInstruction32(Insn, 4, 1))
3740 return MCDisassembler::Fail; // UNDEFINED
3741 index = fieldFromInstruction32(Insn, 6, 2);
3742 if (fieldFromInstruction32(Insn, 5, 1))
3746 if (fieldFromInstruction32(Insn, 4, 2))
3747 return MCDisassembler::Fail; // UNDEFINED
3748 index = fieldFromInstruction32(Insn, 7, 1);
3749 if (fieldFromInstruction32(Insn, 6, 1))
3754 if (Rm != 0xF) { // Writeback
3755 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3756 return MCDisassembler::Fail;
3758 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3759 return MCDisassembler::Fail;
3760 Inst.addOperand(MCOperand::CreateImm(align));
3763 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3764 return MCDisassembler::Fail;
3766 Inst.addOperand(MCOperand::CreateReg(0));
3769 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3770 return MCDisassembler::Fail;
3771 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3772 return MCDisassembler::Fail;
3773 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3774 return MCDisassembler::Fail;
3775 Inst.addOperand(MCOperand::CreateImm(index));
3781 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3782 uint64_t Address, const void *Decoder) {
3783 DecodeStatus S = MCDisassembler::Success;
3785 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3786 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3787 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3788 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3789 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3796 return MCDisassembler::Fail;
3798 if (fieldFromInstruction32(Insn, 4, 1))
3800 index = fieldFromInstruction32(Insn, 5, 3);
3803 if (fieldFromInstruction32(Insn, 4, 1))
3805 index = fieldFromInstruction32(Insn, 6, 2);
3806 if (fieldFromInstruction32(Insn, 5, 1))
3810 if (fieldFromInstruction32(Insn, 4, 2))
3811 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3812 index = fieldFromInstruction32(Insn, 7, 1);
3813 if (fieldFromInstruction32(Insn, 6, 1))
3818 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3819 return MCDisassembler::Fail;
3820 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3821 return MCDisassembler::Fail;
3822 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3823 return MCDisassembler::Fail;
3824 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3825 return MCDisassembler::Fail;
3827 if (Rm != 0xF) { // Writeback
3828 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3829 return MCDisassembler::Fail;
3831 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3832 return MCDisassembler::Fail;
3833 Inst.addOperand(MCOperand::CreateImm(align));
3836 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3837 return MCDisassembler::Fail;
3839 Inst.addOperand(MCOperand::CreateReg(0));
3842 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3843 return MCDisassembler::Fail;
3844 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3845 return MCDisassembler::Fail;
3846 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3847 return MCDisassembler::Fail;
3848 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3849 return MCDisassembler::Fail;
3850 Inst.addOperand(MCOperand::CreateImm(index));
3855 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3856 uint64_t Address, const void *Decoder) {
3857 DecodeStatus S = MCDisassembler::Success;
3859 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3860 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3861 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3862 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3863 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3870 return MCDisassembler::Fail;
3872 if (fieldFromInstruction32(Insn, 4, 1))
3874 index = fieldFromInstruction32(Insn, 5, 3);
3877 if (fieldFromInstruction32(Insn, 4, 1))
3879 index = fieldFromInstruction32(Insn, 6, 2);
3880 if (fieldFromInstruction32(Insn, 5, 1))
3884 if (fieldFromInstruction32(Insn, 4, 2))
3885 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3886 index = fieldFromInstruction32(Insn, 7, 1);
3887 if (fieldFromInstruction32(Insn, 6, 1))
3892 if (Rm != 0xF) { // Writeback
3893 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3894 return MCDisassembler::Fail;
3896 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3897 return MCDisassembler::Fail;
3898 Inst.addOperand(MCOperand::CreateImm(align));
3901 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3902 return MCDisassembler::Fail;
3904 Inst.addOperand(MCOperand::CreateReg(0));
3907 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3908 return MCDisassembler::Fail;
3909 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3910 return MCDisassembler::Fail;
3911 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3912 return MCDisassembler::Fail;
3913 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3914 return MCDisassembler::Fail;
3915 Inst.addOperand(MCOperand::CreateImm(index));
3920 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
3921 uint64_t Address, const void *Decoder) {
3922 DecodeStatus S = MCDisassembler::Success;
3923 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3924 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3925 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3926 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3927 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3929 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3930 S = MCDisassembler::SoftFail;
3932 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3933 return MCDisassembler::Fail;
3934 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3935 return MCDisassembler::Fail;
3936 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3937 return MCDisassembler::Fail;
3938 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3939 return MCDisassembler::Fail;
3940 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3941 return MCDisassembler::Fail;
3946 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3947 uint64_t Address, const void *Decoder) {
3948 DecodeStatus S = MCDisassembler::Success;
3949 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3950 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3951 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3952 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3953 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3955 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3956 S = MCDisassembler::SoftFail;
3958 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3959 return MCDisassembler::Fail;
3960 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3961 return MCDisassembler::Fail;
3962 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3963 return MCDisassembler::Fail;
3964 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3965 return MCDisassembler::Fail;
3966 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3967 return MCDisassembler::Fail;
3972 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3973 uint64_t Address, const void *Decoder) {
3974 DecodeStatus S = MCDisassembler::Success;
3975 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3976 // The InstPrinter needs to have the low bit of the predicate in
3977 // the mask operand to be able to print it properly.
3978 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3982 S = MCDisassembler::SoftFail;
3985 if ((mask & 0xF) == 0) {
3986 // Preserve the high bit of the mask, which is the low bit of
3990 S = MCDisassembler::SoftFail;
3993 Inst.addOperand(MCOperand::CreateImm(pred));
3994 Inst.addOperand(MCOperand::CreateImm(mask));
3999 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
4000 uint64_t Address, const void *Decoder) {
4001 DecodeStatus S = MCDisassembler::Success;
4003 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4004 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
4005 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4006 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
4007 unsigned W = fieldFromInstruction32(Insn, 21, 1);
4008 unsigned U = fieldFromInstruction32(Insn, 23, 1);
4009 unsigned P = fieldFromInstruction32(Insn, 24, 1);
4010 bool writeback = (W == 1) | (P == 0);
4012 addr |= (U << 8) | (Rn << 9);
4014 if (writeback && (Rn == Rt || Rn == Rt2))
4015 Check(S, MCDisassembler::SoftFail);
4017 Check(S, MCDisassembler::SoftFail);
4020 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4021 return MCDisassembler::Fail;
4023 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4024 return MCDisassembler::Fail;
4025 // Writeback operand
4026 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4027 return MCDisassembler::Fail;
4029 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4030 return MCDisassembler::Fail;
4036 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
4037 uint64_t Address, const void *Decoder) {
4038 DecodeStatus S = MCDisassembler::Success;
4040 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4041 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
4042 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4043 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
4044 unsigned W = fieldFromInstruction32(Insn, 21, 1);
4045 unsigned U = fieldFromInstruction32(Insn, 23, 1);
4046 unsigned P = fieldFromInstruction32(Insn, 24, 1);
4047 bool writeback = (W == 1) | (P == 0);
4049 addr |= (U << 8) | (Rn << 9);
4051 if (writeback && (Rn == Rt || Rn == Rt2))
4052 Check(S, MCDisassembler::SoftFail);
4054 // Writeback operand
4055 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4056 return MCDisassembler::Fail;
4058 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4059 return MCDisassembler::Fail;
4061 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4062 return MCDisassembler::Fail;
4064 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4065 return MCDisassembler::Fail;
4070 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn,
4071 uint64_t Address, const void *Decoder) {
4072 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
4073 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
4074 if (sign1 != sign2) return MCDisassembler::Fail;
4076 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
4077 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
4078 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
4080 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4082 return MCDisassembler::Success;
4085 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, uint32_t Val,
4087 const void *Decoder) {
4088 DecodeStatus S = MCDisassembler::Success;
4090 // Shift of "asr #32" is not allowed in Thumb2 mode.
4091 if (Val == 0x20) S = MCDisassembler::SoftFail;
4092 Inst.addOperand(MCOperand::CreateImm(Val));
4096 static DecodeStatus DecodeSwap(llvm::MCInst &Inst, unsigned Insn,
4097 uint64_t Address, const void *Decoder) {
4098 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4099 unsigned Rt2 = fieldFromInstruction32(Insn, 0, 4);
4100 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4101 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
4104 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4106 DecodeStatus S = MCDisassembler::Success;
4107 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4108 return MCDisassembler::Fail;
4109 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4110 return MCDisassembler::Fail;
4111 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4112 return MCDisassembler::Fail;
4113 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4114 return MCDisassembler::Fail;
4119 static DecodeStatus DecodeVCVTD(llvm::MCInst &Inst, unsigned Insn,
4120 uint64_t Address, const void *Decoder) {
4121 unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
4122 Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
4123 unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
4124 Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
4125 unsigned imm = fieldFromInstruction32(Insn, 16, 6);
4126 unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
4128 DecodeStatus S = MCDisassembler::Success;
4130 // VMOVv2f32 is ambiguous with these decodings.
4131 if (!(imm & 0x38) && cmode == 0xF) {
4132 Inst.setOpcode(ARM::VMOVv2f32);
4133 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4136 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4138 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4139 return MCDisassembler::Fail;
4140 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4141 return MCDisassembler::Fail;
4142 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4147 static DecodeStatus DecodeVCVTQ(llvm::MCInst &Inst, unsigned Insn,
4148 uint64_t Address, const void *Decoder) {
4149 unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
4150 Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
4151 unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
4152 Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
4153 unsigned imm = fieldFromInstruction32(Insn, 16, 6);
4154 unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
4156 DecodeStatus S = MCDisassembler::Success;
4158 // VMOVv4f32 is ambiguous with these decodings.
4159 if (!(imm & 0x38) && cmode == 0xF) {
4160 Inst.setOpcode(ARM::VMOVv4f32);
4161 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4164 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4166 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4167 return MCDisassembler::Fail;
4168 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4169 return MCDisassembler::Fail;
4170 Inst.addOperand(MCOperand::CreateImm(64 - imm));