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,
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,
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);
130 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
131 uint64_t Address, const void *Decoder);
132 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
133 uint64_t Address, const void *Decoder);
134 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
135 uint64_t Address, const void *Decoder);
136 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
137 uint64_t Address, const void *Decoder);
138 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
139 uint64_t Address, const void *Decoder);
140 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
141 uint64_t Address, const void *Decoder);
143 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Insn,
144 uint64_t Address, const void *Decoder);
145 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
146 uint64_t Address, const void *Decoder);
147 static DecodeStatus DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst,
150 const void *Decoder);
151 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Insn,
152 uint64_t Address, const void *Decoder);
153 static DecodeStatus DecodeAddrMode3Instruction(llvm::MCInst &Inst,unsigned Insn,
154 uint64_t Address, const void *Decoder);
155 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Insn,
156 uint64_t Address, const void *Decoder);
157 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Insn,
158 uint64_t Address, const void *Decoder);
160 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst & Inst,
163 const void *Decoder);
164 static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
165 uint64_t Address, const void *Decoder);
166 static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
167 uint64_t Address, const void *Decoder);
168 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
169 uint64_t Address, const void *Decoder);
170 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
171 uint64_t Address, const void *Decoder);
172 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
173 uint64_t Address, const void *Decoder);
174 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
175 uint64_t Address, const void *Decoder);
176 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
177 uint64_t Address, const void *Decoder);
178 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
179 uint64_t Address, const void *Decoder);
180 static DecodeStatus DecodeBranchImmInstruction(llvm::MCInst &Inst,unsigned Insn,
181 uint64_t Address, const void *Decoder);
182 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
183 uint64_t Address, const void *Decoder);
184 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Val,
185 uint64_t Address, const void *Decoder);
186 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
188 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeNEONModImmInstruction(llvm::MCInst &Inst,unsigned Val,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Val,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
201 uint64_t Address, const void *Decoder);
202 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
203 uint64_t Address, const void *Decoder);
204 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
205 uint64_t Address, const void *Decoder);
206 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
207 uint64_t Address, const void *Decoder);
208 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
209 uint64_t Address, const void *Decoder);
210 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
211 uint64_t Address, const void *Decoder);
212 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Insn,
213 uint64_t Address, const void *Decoder);
214 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
215 uint64_t Address, const void *Decoder);
216 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn,
217 uint64_t Address, const void *Decoder);
218 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
219 uint64_t Address, const void *Decoder);
220 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
221 uint64_t Address, const void *Decoder);
222 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
223 uint64_t Address, const void *Decoder);
224 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
225 uint64_t Address, const void *Decoder);
226 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
227 uint64_t Address, const void *Decoder);
228 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
229 uint64_t Address, const void *Decoder);
230 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
231 uint64_t Address, const void *Decoder);
232 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
233 uint64_t Address, const void *Decoder);
234 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
235 uint64_t Address, const void *Decoder);
236 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
237 uint64_t Address, const void *Decoder);
238 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
239 uint64_t Address, const void *Decoder);
240 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
241 uint64_t Address, const void *Decoder);
242 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
243 uint64_t Address, const void *Decoder);
244 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
245 uint64_t Address, const void *Decoder);
246 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
247 uint64_t Address, const void *Decoder);
248 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
249 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeSwap(llvm::MCInst &Inst, unsigned Insn,
251 uint64_t Address, const void *Decoder);
252 static DecodeStatus DecodeVCVTD(llvm::MCInst &Inst, unsigned Insn,
253 uint64_t Address, const void *Decoder);
254 static DecodeStatus DecodeVCVTQ(llvm::MCInst &Inst, unsigned Insn,
255 uint64_t Address, const void *Decoder);
258 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
259 uint64_t Address, const void *Decoder);
260 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
261 uint64_t Address, const void *Decoder);
262 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
263 uint64_t Address, const void *Decoder);
264 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
265 uint64_t Address, const void *Decoder);
266 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
267 uint64_t Address, const void *Decoder);
268 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
269 uint64_t Address, const void *Decoder);
270 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
271 uint64_t Address, const void *Decoder);
272 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Val,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
307 uint64_t Address, const void *Decoder);
308 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Val,
309 uint64_t Address, const void *Decoder);
310 static DecodeStatus DecodeT2LDRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
311 uint64_t Address, const void *Decoder);
312 static DecodeStatus DecodeT2STRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
313 uint64_t Address, const void *Decoder);
314 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, unsigned Val,
315 uint64_t Address, const void *Decoder);
316 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Val,
317 uint64_t Address, const void *Decoder);
318 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, unsigned Val,
319 uint64_t Address, const void *Decoder);
323 #include "ARMGenDisassemblerTables.inc"
324 #include "ARMGenInstrInfo.inc"
325 #include "ARMGenEDInfo.inc"
327 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
328 return new ARMDisassembler(STI);
331 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
332 return new ThumbDisassembler(STI);
335 const EDInstInfo *ARMDisassembler::getEDInfo() const {
339 const EDInstInfo *ThumbDisassembler::getEDInfo() const {
343 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
344 MemoryObject &Region,
347 raw_ostream &cs) const {
352 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
353 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
355 // We want to read exactly 4 bytes of data.
356 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
358 return MCDisassembler::Fail;
361 // Encoded as a small-endian 32-bit word in the stream.
362 uint32_t insn = (bytes[3] << 24) |
367 // Calling the auto-generated decoder function.
368 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
369 if (result != MCDisassembler::Fail) {
374 // VFP and NEON instructions, similarly, are shared between ARM
377 result = decodeVFPInstruction32(MI, insn, Address, this, STI);
378 if (result != MCDisassembler::Fail) {
384 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
385 if (result != MCDisassembler::Fail) {
387 // Add a fake predicate operand, because we share these instruction
388 // definitions with Thumb2 where these instructions are predicable.
389 if (!DecodePredicateOperand(MI, 0xE, Address, this))
390 return MCDisassembler::Fail;
395 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
396 if (result != MCDisassembler::Fail) {
398 // Add a fake predicate operand, because we share these instruction
399 // definitions with Thumb2 where these instructions are predicable.
400 if (!DecodePredicateOperand(MI, 0xE, Address, this))
401 return MCDisassembler::Fail;
406 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
407 if (result != MCDisassembler::Fail) {
409 // Add a fake predicate operand, because we share these instruction
410 // definitions with Thumb2 where these instructions are predicable.
411 if (!DecodePredicateOperand(MI, 0xE, Address, this))
412 return MCDisassembler::Fail;
419 return MCDisassembler::Fail;
423 extern const MCInstrDesc ARMInsts[];
426 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
427 /// immediate Value in the MCInst. The immediate Value has had any PC
428 /// adjustment made by the caller. If the instruction is a branch instruction
429 /// then isBranch is true, else false. If the getOpInfo() function was set as
430 /// part of the setupForSymbolicDisassembly() call then that function is called
431 /// to get any symbolic information at the Address for this instruction. If
432 /// that returns non-zero then the symbolic information it returns is used to
433 /// create an MCExpr and that is added as an operand to the MCInst. If
434 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
435 /// Value is done and if a symbol is found an MCExpr is created with that, else
436 /// an MCExpr with Value is created. This function returns true if it adds an
437 /// operand to the MCInst and false otherwise.
438 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
439 bool isBranch, uint64_t InstSize,
440 MCInst &MI, const void *Decoder) {
441 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
442 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
443 struct LLVMOpInfo1 SymbolicOp;
444 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
445 SymbolicOp.Value = Value;
446 void *DisInfo = Dis->getDisInfoBlock();
449 !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
450 // Clear SymbolicOp.Value from above and also all other fields.
451 memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
452 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
455 uint64_t ReferenceType;
457 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
459 ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
460 const char *ReferenceName;
461 const char *Name = SymbolLookUp(DisInfo, Value, &ReferenceType, Address,
464 SymbolicOp.AddSymbol.Name = Name;
465 SymbolicOp.AddSymbol.Present = true;
467 // For branches always create an MCExpr so it gets printed as hex address.
469 SymbolicOp.Value = Value;
471 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
472 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
473 if (!Name && !isBranch)
477 MCContext *Ctx = Dis->getMCContext();
478 const MCExpr *Add = NULL;
479 if (SymbolicOp.AddSymbol.Present) {
480 if (SymbolicOp.AddSymbol.Name) {
481 StringRef Name(SymbolicOp.AddSymbol.Name);
482 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
483 Add = MCSymbolRefExpr::Create(Sym, *Ctx);
485 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
489 const MCExpr *Sub = NULL;
490 if (SymbolicOp.SubtractSymbol.Present) {
491 if (SymbolicOp.SubtractSymbol.Name) {
492 StringRef Name(SymbolicOp.SubtractSymbol.Name);
493 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
494 Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
496 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
500 const MCExpr *Off = NULL;
501 if (SymbolicOp.Value != 0)
502 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
508 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
510 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
512 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
517 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
524 Expr = MCConstantExpr::Create(0, *Ctx);
527 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
528 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
529 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
530 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
531 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
532 MI.addOperand(MCOperand::CreateExpr(Expr));
534 llvm_unreachable("bad SymbolicOp.VariantKind");
539 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
540 /// referenced by a load instruction with the base register that is the Pc.
541 /// These can often be values in a literal pool near the Address of the
542 /// instruction. The Address of the instruction and its immediate Value are
543 /// used as a possible literal pool entry. The SymbolLookUp call back will
544 /// return the name of a symbol referenced by the the literal pool's entry if
545 /// the referenced address is that of a symbol. Or it will return a pointer to
546 /// a literal 'C' string if the referenced address of the literal pool's entry
547 /// is an address into a section with 'C' string literals.
548 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
549 const void *Decoder) {
550 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
551 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
553 void *DisInfo = Dis->getDisInfoBlock();
554 uint64_t ReferenceType;
555 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
556 const char *ReferenceName;
557 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
558 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
559 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
560 (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
564 // Thumb1 instructions don't have explicit S bits. Rather, they
565 // implicitly set CPSR. Since it's not represented in the encoding, the
566 // auto-generated decoder won't inject the CPSR operand. We need to fix
567 // that as a post-pass.
568 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
569 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
570 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
571 MCInst::iterator I = MI.begin();
572 for (unsigned i = 0; i < NumOps; ++i, ++I) {
573 if (I == MI.end()) break;
574 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
575 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
576 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
581 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
584 // Most Thumb instructions don't have explicit predicates in the
585 // encoding, but rather get their predicates from IT context. We need
586 // to fix up the predicate operands using this context information as a
588 MCDisassembler::DecodeStatus
589 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
590 MCDisassembler::DecodeStatus S = Success;
592 // A few instructions actually have predicates encoded in them. Don't
593 // try to overwrite it if we're seeing one of those.
594 switch (MI.getOpcode()) {
605 // Some instructions (mostly conditional branches) are not
606 // allowed in IT blocks.
607 if (!ITBlock.empty())
616 // Some instructions (mostly unconditional branches) can
617 // only appears at the end of, or outside of, an IT.
618 if (ITBlock.size() > 1)
625 // If we're in an IT block, base the predicate on that. Otherwise,
626 // assume a predicate of AL.
628 if (!ITBlock.empty()) {
636 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
637 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
638 MCInst::iterator I = MI.begin();
639 for (unsigned i = 0; i < NumOps; ++i, ++I) {
640 if (I == MI.end()) break;
641 if (OpInfo[i].isPredicate()) {
642 I = MI.insert(I, MCOperand::CreateImm(CC));
645 MI.insert(I, MCOperand::CreateReg(0));
647 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
652 I = MI.insert(I, MCOperand::CreateImm(CC));
655 MI.insert(I, MCOperand::CreateReg(0));
657 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
662 // Thumb VFP instructions are a special case. Because we share their
663 // encodings between ARM and Thumb modes, and they are predicable in ARM
664 // mode, the auto-generated decoder will give them an (incorrect)
665 // predicate operand. We need to rewrite these operands based on the IT
666 // context as a post-pass.
667 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
669 if (!ITBlock.empty()) {
675 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
676 MCInst::iterator I = MI.begin();
677 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
678 for (unsigned i = 0; i < NumOps; ++i, ++I) {
679 if (OpInfo[i].isPredicate() ) {
685 I->setReg(ARM::CPSR);
691 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
692 MemoryObject &Region,
695 raw_ostream &cs) const {
700 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
701 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
703 // We want to read exactly 2 bytes of data.
704 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
706 return MCDisassembler::Fail;
709 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
710 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
711 if (result != MCDisassembler::Fail) {
713 Check(result, AddThumbPredicate(MI));
718 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
721 bool InITBlock = !ITBlock.empty();
722 Check(result, AddThumbPredicate(MI));
723 AddThumb1SBit(MI, InITBlock);
728 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
729 if (result != MCDisassembler::Fail) {
732 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
733 // the Thumb predicate.
734 if (MI.getOpcode() == ARM::t2IT && !ITBlock.empty())
735 result = MCDisassembler::SoftFail;
737 Check(result, AddThumbPredicate(MI));
739 // If we find an IT instruction, we need to parse its condition
740 // code and mask operands so that we can apply them correctly
741 // to the subsequent instructions.
742 if (MI.getOpcode() == ARM::t2IT) {
744 // (3 - the number of trailing zeros) is the number of then / else.
745 unsigned firstcond = MI.getOperand(0).getImm();
746 unsigned Mask = MI.getOperand(1).getImm();
747 unsigned CondBit0 = Mask >> 4 & 1;
748 unsigned NumTZ = CountTrailingZeros_32(Mask);
749 assert(NumTZ <= 3 && "Invalid IT mask!");
750 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
751 bool T = ((Mask >> Pos) & 1) == CondBit0;
753 ITBlock.insert(ITBlock.begin(), firstcond);
755 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
758 ITBlock.push_back(firstcond);
764 // We want to read exactly 4 bytes of data.
765 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
767 return MCDisassembler::Fail;
770 uint32_t insn32 = (bytes[3] << 8) |
775 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
776 if (result != MCDisassembler::Fail) {
778 bool InITBlock = ITBlock.size();
779 Check(result, AddThumbPredicate(MI));
780 AddThumb1SBit(MI, InITBlock);
785 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
786 if (result != MCDisassembler::Fail) {
788 Check(result, AddThumbPredicate(MI));
793 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
794 if (result != MCDisassembler::Fail) {
796 UpdateThumbVFPPredicate(MI);
801 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
802 if (result != MCDisassembler::Fail) {
804 Check(result, AddThumbPredicate(MI));
808 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
810 uint32_t NEONLdStInsn = insn32;
811 NEONLdStInsn &= 0xF0FFFFFF;
812 NEONLdStInsn |= 0x04000000;
813 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
814 if (result != MCDisassembler::Fail) {
816 Check(result, AddThumbPredicate(MI));
821 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
823 uint32_t NEONDataInsn = insn32;
824 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
825 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
826 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
827 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
828 if (result != MCDisassembler::Fail) {
830 Check(result, AddThumbPredicate(MI));
836 return MCDisassembler::Fail;
840 extern "C" void LLVMInitializeARMDisassembler() {
841 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
842 createARMDisassembler);
843 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
844 createThumbDisassembler);
847 static const unsigned GPRDecoderTable[] = {
848 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
849 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
850 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
851 ARM::R12, ARM::SP, ARM::LR, ARM::PC
854 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
855 uint64_t Address, const void *Decoder) {
857 return MCDisassembler::Fail;
859 unsigned Register = GPRDecoderTable[RegNo];
860 Inst.addOperand(MCOperand::CreateReg(Register));
861 return MCDisassembler::Success;
865 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
866 uint64_t Address, const void *Decoder) {
867 if (RegNo == 15) return MCDisassembler::Fail;
868 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
871 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
872 uint64_t Address, const void *Decoder) {
874 return MCDisassembler::Fail;
875 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
878 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
879 uint64_t Address, const void *Decoder) {
880 unsigned Register = 0;
901 return MCDisassembler::Fail;
904 Inst.addOperand(MCOperand::CreateReg(Register));
905 return MCDisassembler::Success;
908 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
909 uint64_t Address, const void *Decoder) {
910 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
911 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
914 static const unsigned SPRDecoderTable[] = {
915 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
916 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
917 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
918 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
919 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
920 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
921 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
922 ARM::S28, ARM::S29, ARM::S30, ARM::S31
925 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
926 uint64_t Address, const void *Decoder) {
928 return MCDisassembler::Fail;
930 unsigned Register = SPRDecoderTable[RegNo];
931 Inst.addOperand(MCOperand::CreateReg(Register));
932 return MCDisassembler::Success;
935 static const unsigned DPRDecoderTable[] = {
936 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
937 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
938 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
939 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
940 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
941 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
942 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
943 ARM::D28, ARM::D29, ARM::D30, ARM::D31
946 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
947 uint64_t Address, const void *Decoder) {
949 return MCDisassembler::Fail;
951 unsigned Register = DPRDecoderTable[RegNo];
952 Inst.addOperand(MCOperand::CreateReg(Register));
953 return MCDisassembler::Success;
956 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
957 uint64_t Address, const void *Decoder) {
959 return MCDisassembler::Fail;
960 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
964 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
965 uint64_t Address, const void *Decoder) {
967 return MCDisassembler::Fail;
968 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
971 static const unsigned QPRDecoderTable[] = {
972 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
973 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
974 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
975 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
979 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
980 uint64_t Address, const void *Decoder) {
982 return MCDisassembler::Fail;
985 unsigned Register = QPRDecoderTable[RegNo];
986 Inst.addOperand(MCOperand::CreateReg(Register));
987 return MCDisassembler::Success;
990 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
991 uint64_t Address, const void *Decoder) {
992 if (Val == 0xF) return MCDisassembler::Fail;
993 // AL predicate is not allowed on Thumb1 branches.
994 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
995 return MCDisassembler::Fail;
996 Inst.addOperand(MCOperand::CreateImm(Val));
997 if (Val == ARMCC::AL) {
998 Inst.addOperand(MCOperand::CreateReg(0));
1000 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1001 return MCDisassembler::Success;
1004 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
1005 uint64_t Address, const void *Decoder) {
1007 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1009 Inst.addOperand(MCOperand::CreateReg(0));
1010 return MCDisassembler::Success;
1013 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
1014 uint64_t Address, const void *Decoder) {
1015 uint32_t imm = Val & 0xFF;
1016 uint32_t rot = (Val & 0xF00) >> 7;
1017 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1018 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1019 return MCDisassembler::Success;
1022 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
1023 uint64_t Address, const void *Decoder) {
1024 DecodeStatus S = MCDisassembler::Success;
1026 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1027 unsigned type = fieldFromInstruction32(Val, 5, 2);
1028 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1030 // Register-immediate
1031 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1032 return MCDisassembler::Fail;
1034 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1037 Shift = ARM_AM::lsl;
1040 Shift = ARM_AM::lsr;
1043 Shift = ARM_AM::asr;
1046 Shift = ARM_AM::ror;
1050 if (Shift == ARM_AM::ror && imm == 0)
1051 Shift = ARM_AM::rrx;
1053 unsigned Op = Shift | (imm << 3);
1054 Inst.addOperand(MCOperand::CreateImm(Op));
1059 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
1060 uint64_t Address, const void *Decoder) {
1061 DecodeStatus S = MCDisassembler::Success;
1063 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1064 unsigned type = fieldFromInstruction32(Val, 5, 2);
1065 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
1067 // Register-register
1068 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1069 return MCDisassembler::Fail;
1070 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1071 return MCDisassembler::Fail;
1073 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1076 Shift = ARM_AM::lsl;
1079 Shift = ARM_AM::lsr;
1082 Shift = ARM_AM::asr;
1085 Shift = ARM_AM::ror;
1089 Inst.addOperand(MCOperand::CreateImm(Shift));
1094 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
1095 uint64_t Address, const void *Decoder) {
1096 DecodeStatus S = MCDisassembler::Success;
1098 bool writebackLoad = false;
1099 unsigned writebackReg = 0;
1100 switch (Inst.getOpcode()) {
1103 case ARM::LDMIA_UPD:
1104 case ARM::LDMDB_UPD:
1105 case ARM::LDMIB_UPD:
1106 case ARM::LDMDA_UPD:
1107 case ARM::t2LDMIA_UPD:
1108 case ARM::t2LDMDB_UPD:
1109 writebackLoad = true;
1110 writebackReg = Inst.getOperand(0).getReg();
1114 // Empty register lists are not allowed.
1115 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1116 for (unsigned i = 0; i < 16; ++i) {
1117 if (Val & (1 << i)) {
1118 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1119 return MCDisassembler::Fail;
1120 // Writeback not allowed if Rn is in the target list.
1121 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1122 Check(S, MCDisassembler::SoftFail);
1129 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
1130 uint64_t Address, const void *Decoder) {
1131 DecodeStatus S = MCDisassembler::Success;
1133 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1134 unsigned regs = Val & 0xFF;
1136 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1137 return MCDisassembler::Fail;
1138 for (unsigned i = 0; i < (regs - 1); ++i) {
1139 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1140 return MCDisassembler::Fail;
1146 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
1147 uint64_t Address, const void *Decoder) {
1148 DecodeStatus S = MCDisassembler::Success;
1150 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1151 unsigned regs = (Val & 0xFF) / 2;
1153 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1154 return MCDisassembler::Fail;
1155 for (unsigned i = 0; i < (regs - 1); ++i) {
1156 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1157 return MCDisassembler::Fail;
1163 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
1164 uint64_t Address, const void *Decoder) {
1165 // This operand encodes a mask of contiguous zeros between a specified MSB
1166 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1167 // the mask of all bits LSB-and-lower, and then xor them to create
1168 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1169 // create the final mask.
1170 unsigned msb = fieldFromInstruction32(Val, 5, 5);
1171 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
1173 DecodeStatus S = MCDisassembler::Success;
1174 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1176 uint32_t msb_mask = 0xFFFFFFFF;
1177 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1178 uint32_t lsb_mask = (1U << lsb) - 1;
1180 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1184 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
1185 uint64_t Address, const void *Decoder) {
1186 DecodeStatus S = MCDisassembler::Success;
1188 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1189 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
1190 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
1191 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
1192 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1193 unsigned U = fieldFromInstruction32(Insn, 23, 1);
1195 switch (Inst.getOpcode()) {
1196 case ARM::LDC_OFFSET:
1199 case ARM::LDC_OPTION:
1200 case ARM::LDCL_OFFSET:
1202 case ARM::LDCL_POST:
1203 case ARM::LDCL_OPTION:
1204 case ARM::STC_OFFSET:
1207 case ARM::STC_OPTION:
1208 case ARM::STCL_OFFSET:
1210 case ARM::STCL_POST:
1211 case ARM::STCL_OPTION:
1212 case ARM::t2LDC_OFFSET:
1213 case ARM::t2LDC_PRE:
1214 case ARM::t2LDC_POST:
1215 case ARM::t2LDC_OPTION:
1216 case ARM::t2LDCL_OFFSET:
1217 case ARM::t2LDCL_PRE:
1218 case ARM::t2LDCL_POST:
1219 case ARM::t2LDCL_OPTION:
1220 case ARM::t2STC_OFFSET:
1221 case ARM::t2STC_PRE:
1222 case ARM::t2STC_POST:
1223 case ARM::t2STC_OPTION:
1224 case ARM::t2STCL_OFFSET:
1225 case ARM::t2STCL_PRE:
1226 case ARM::t2STCL_POST:
1227 case ARM::t2STCL_OPTION:
1228 if (coproc == 0xA || coproc == 0xB)
1229 return MCDisassembler::Fail;
1235 Inst.addOperand(MCOperand::CreateImm(coproc));
1236 Inst.addOperand(MCOperand::CreateImm(CRd));
1237 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1238 return MCDisassembler::Fail;
1240 switch (Inst.getOpcode()) {
1241 case ARM::t2LDC2_OFFSET:
1242 case ARM::t2LDC2L_OFFSET:
1243 case ARM::t2LDC2_PRE:
1244 case ARM::t2LDC2L_PRE:
1245 case ARM::t2STC2_OFFSET:
1246 case ARM::t2STC2L_OFFSET:
1247 case ARM::t2STC2_PRE:
1248 case ARM::t2STC2L_PRE:
1249 case ARM::LDC2_OFFSET:
1250 case ARM::LDC2L_OFFSET:
1252 case ARM::LDC2L_PRE:
1253 case ARM::STC2_OFFSET:
1254 case ARM::STC2L_OFFSET:
1256 case ARM::STC2L_PRE:
1257 case ARM::t2LDC_OFFSET:
1258 case ARM::t2LDCL_OFFSET:
1259 case ARM::t2LDC_PRE:
1260 case ARM::t2LDCL_PRE:
1261 case ARM::t2STC_OFFSET:
1262 case ARM::t2STCL_OFFSET:
1263 case ARM::t2STC_PRE:
1264 case ARM::t2STCL_PRE:
1265 case ARM::LDC_OFFSET:
1266 case ARM::LDCL_OFFSET:
1269 case ARM::STC_OFFSET:
1270 case ARM::STCL_OFFSET:
1273 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1274 Inst.addOperand(MCOperand::CreateImm(imm));
1276 case ARM::t2LDC2_POST:
1277 case ARM::t2LDC2L_POST:
1278 case ARM::t2STC2_POST:
1279 case ARM::t2STC2L_POST:
1280 case ARM::LDC2_POST:
1281 case ARM::LDC2L_POST:
1282 case ARM::STC2_POST:
1283 case ARM::STC2L_POST:
1284 case ARM::t2LDC_POST:
1285 case ARM::t2LDCL_POST:
1286 case ARM::t2STC_POST:
1287 case ARM::t2STCL_POST:
1289 case ARM::LDCL_POST:
1291 case ARM::STCL_POST:
1295 // The 'option' variant doesn't encode 'U' in the immediate since
1296 // the immediate is unsigned [0,255].
1297 Inst.addOperand(MCOperand::CreateImm(imm));
1301 switch (Inst.getOpcode()) {
1302 case ARM::LDC_OFFSET:
1305 case ARM::LDC_OPTION:
1306 case ARM::LDCL_OFFSET:
1308 case ARM::LDCL_POST:
1309 case ARM::LDCL_OPTION:
1310 case ARM::STC_OFFSET:
1313 case ARM::STC_OPTION:
1314 case ARM::STCL_OFFSET:
1316 case ARM::STCL_POST:
1317 case ARM::STCL_OPTION:
1318 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1319 return MCDisassembler::Fail;
1329 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1330 uint64_t Address, const void *Decoder) {
1331 DecodeStatus S = MCDisassembler::Success;
1333 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1334 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1335 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1336 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1337 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1338 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1339 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1340 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1342 // On stores, the writeback operand precedes Rt.
1343 switch (Inst.getOpcode()) {
1344 case ARM::STR_POST_IMM:
1345 case ARM::STR_POST_REG:
1346 case ARM::STRB_POST_IMM:
1347 case ARM::STRB_POST_REG:
1348 case ARM::STRT_POST_REG:
1349 case ARM::STRT_POST_IMM:
1350 case ARM::STRBT_POST_REG:
1351 case ARM::STRBT_POST_IMM:
1352 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1353 return MCDisassembler::Fail;
1359 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1360 return MCDisassembler::Fail;
1362 // On loads, the writeback operand comes after Rt.
1363 switch (Inst.getOpcode()) {
1364 case ARM::LDR_POST_IMM:
1365 case ARM::LDR_POST_REG:
1366 case ARM::LDRB_POST_IMM:
1367 case ARM::LDRB_POST_REG:
1368 case ARM::LDRBT_POST_REG:
1369 case ARM::LDRBT_POST_IMM:
1370 case ARM::LDRT_POST_REG:
1371 case ARM::LDRT_POST_IMM:
1372 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1373 return MCDisassembler::Fail;
1379 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1380 return MCDisassembler::Fail;
1382 ARM_AM::AddrOpc Op = ARM_AM::add;
1383 if (!fieldFromInstruction32(Insn, 23, 1))
1386 bool writeback = (P == 0) || (W == 1);
1387 unsigned idx_mode = 0;
1389 idx_mode = ARMII::IndexModePre;
1390 else if (!P && writeback)
1391 idx_mode = ARMII::IndexModePost;
1393 if (writeback && (Rn == 15 || Rn == Rt))
1394 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1397 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1398 return MCDisassembler::Fail;
1399 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1400 switch( fieldFromInstruction32(Insn, 5, 2)) {
1414 return MCDisassembler::Fail;
1416 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1417 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1419 Inst.addOperand(MCOperand::CreateImm(imm));
1421 Inst.addOperand(MCOperand::CreateReg(0));
1422 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1423 Inst.addOperand(MCOperand::CreateImm(tmp));
1426 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1427 return MCDisassembler::Fail;
1432 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1433 uint64_t Address, const void *Decoder) {
1434 DecodeStatus S = MCDisassembler::Success;
1436 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1437 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1438 unsigned type = fieldFromInstruction32(Val, 5, 2);
1439 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1440 unsigned U = fieldFromInstruction32(Val, 12, 1);
1442 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1458 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1459 return MCDisassembler::Fail;
1460 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1461 return MCDisassembler::Fail;
1464 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1466 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1467 Inst.addOperand(MCOperand::CreateImm(shift));
1473 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1474 uint64_t Address, const void *Decoder) {
1475 DecodeStatus S = MCDisassembler::Success;
1477 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1478 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1479 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1480 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1481 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1482 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1483 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1484 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1485 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1487 bool writeback = (W == 1) | (P == 0);
1489 // For {LD,ST}RD, Rt must be even, else undefined.
1490 switch (Inst.getOpcode()) {
1493 case ARM::STRD_POST:
1496 case ARM::LDRD_POST:
1497 if (Rt & 0x1) return MCDisassembler::Fail;
1503 if (writeback) { // Writeback
1505 U |= ARMII::IndexModePre << 9;
1507 U |= ARMII::IndexModePost << 9;
1509 // On stores, the writeback operand precedes Rt.
1510 switch (Inst.getOpcode()) {
1513 case ARM::STRD_POST:
1516 case ARM::STRH_POST:
1517 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1518 return MCDisassembler::Fail;
1525 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1526 return MCDisassembler::Fail;
1527 switch (Inst.getOpcode()) {
1530 case ARM::STRD_POST:
1533 case ARM::LDRD_POST:
1534 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1535 return MCDisassembler::Fail;
1542 // On loads, the writeback operand comes after Rt.
1543 switch (Inst.getOpcode()) {
1546 case ARM::LDRD_POST:
1549 case ARM::LDRH_POST:
1551 case ARM::LDRSH_PRE:
1552 case ARM::LDRSH_POST:
1554 case ARM::LDRSB_PRE:
1555 case ARM::LDRSB_POST:
1558 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1559 return MCDisassembler::Fail;
1566 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1567 return MCDisassembler::Fail;
1570 Inst.addOperand(MCOperand::CreateReg(0));
1571 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1573 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1574 return MCDisassembler::Fail;
1575 Inst.addOperand(MCOperand::CreateImm(U));
1578 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1579 return MCDisassembler::Fail;
1584 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1585 uint64_t Address, const void *Decoder) {
1586 DecodeStatus S = MCDisassembler::Success;
1588 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1589 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1606 Inst.addOperand(MCOperand::CreateImm(mode));
1607 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1608 return MCDisassembler::Fail;
1613 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1615 uint64_t Address, const void *Decoder) {
1616 DecodeStatus S = MCDisassembler::Success;
1618 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1619 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1620 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1623 switch (Inst.getOpcode()) {
1625 Inst.setOpcode(ARM::RFEDA);
1627 case ARM::LDMDA_UPD:
1628 Inst.setOpcode(ARM::RFEDA_UPD);
1631 Inst.setOpcode(ARM::RFEDB);
1633 case ARM::LDMDB_UPD:
1634 Inst.setOpcode(ARM::RFEDB_UPD);
1637 Inst.setOpcode(ARM::RFEIA);
1639 case ARM::LDMIA_UPD:
1640 Inst.setOpcode(ARM::RFEIA_UPD);
1643 Inst.setOpcode(ARM::RFEIB);
1645 case ARM::LDMIB_UPD:
1646 Inst.setOpcode(ARM::RFEIB_UPD);
1649 Inst.setOpcode(ARM::SRSDA);
1651 case ARM::STMDA_UPD:
1652 Inst.setOpcode(ARM::SRSDA_UPD);
1655 Inst.setOpcode(ARM::SRSDB);
1657 case ARM::STMDB_UPD:
1658 Inst.setOpcode(ARM::SRSDB_UPD);
1661 Inst.setOpcode(ARM::SRSIA);
1663 case ARM::STMIA_UPD:
1664 Inst.setOpcode(ARM::SRSIA_UPD);
1667 Inst.setOpcode(ARM::SRSIB);
1669 case ARM::STMIB_UPD:
1670 Inst.setOpcode(ARM::SRSIB_UPD);
1673 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1676 // For stores (which become SRS's, the only operand is the mode.
1677 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1679 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1683 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1686 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1687 return MCDisassembler::Fail;
1688 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1689 return MCDisassembler::Fail; // Tied
1690 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1691 return MCDisassembler::Fail;
1692 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1693 return MCDisassembler::Fail;
1698 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1699 uint64_t Address, const void *Decoder) {
1700 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1701 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1702 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1703 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1705 DecodeStatus S = MCDisassembler::Success;
1707 // imod == '01' --> UNPREDICTABLE
1708 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1709 // return failure here. The '01' imod value is unprintable, so there's
1710 // nothing useful we could do even if we returned UNPREDICTABLE.
1712 if (imod == 1) return MCDisassembler::Fail;
1715 Inst.setOpcode(ARM::CPS3p);
1716 Inst.addOperand(MCOperand::CreateImm(imod));
1717 Inst.addOperand(MCOperand::CreateImm(iflags));
1718 Inst.addOperand(MCOperand::CreateImm(mode));
1719 } else if (imod && !M) {
1720 Inst.setOpcode(ARM::CPS2p);
1721 Inst.addOperand(MCOperand::CreateImm(imod));
1722 Inst.addOperand(MCOperand::CreateImm(iflags));
1723 if (mode) S = MCDisassembler::SoftFail;
1724 } else if (!imod && M) {
1725 Inst.setOpcode(ARM::CPS1p);
1726 Inst.addOperand(MCOperand::CreateImm(mode));
1727 if (iflags) S = MCDisassembler::SoftFail;
1729 // imod == '00' && M == '0' --> UNPREDICTABLE
1730 Inst.setOpcode(ARM::CPS1p);
1731 Inst.addOperand(MCOperand::CreateImm(mode));
1732 S = MCDisassembler::SoftFail;
1738 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1739 uint64_t Address, const void *Decoder) {
1740 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1741 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1742 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1743 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1745 DecodeStatus S = MCDisassembler::Success;
1747 // imod == '01' --> UNPREDICTABLE
1748 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1749 // return failure here. The '01' imod value is unprintable, so there's
1750 // nothing useful we could do even if we returned UNPREDICTABLE.
1752 if (imod == 1) return MCDisassembler::Fail;
1755 Inst.setOpcode(ARM::t2CPS3p);
1756 Inst.addOperand(MCOperand::CreateImm(imod));
1757 Inst.addOperand(MCOperand::CreateImm(iflags));
1758 Inst.addOperand(MCOperand::CreateImm(mode));
1759 } else if (imod && !M) {
1760 Inst.setOpcode(ARM::t2CPS2p);
1761 Inst.addOperand(MCOperand::CreateImm(imod));
1762 Inst.addOperand(MCOperand::CreateImm(iflags));
1763 if (mode) S = MCDisassembler::SoftFail;
1764 } else if (!imod && M) {
1765 Inst.setOpcode(ARM::t2CPS1p);
1766 Inst.addOperand(MCOperand::CreateImm(mode));
1767 if (iflags) S = MCDisassembler::SoftFail;
1769 // imod == '00' && M == '0' --> UNPREDICTABLE
1770 Inst.setOpcode(ARM::t2CPS1p);
1771 Inst.addOperand(MCOperand::CreateImm(mode));
1772 S = MCDisassembler::SoftFail;
1778 static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1779 uint64_t Address, const void *Decoder) {
1780 DecodeStatus S = MCDisassembler::Success;
1782 unsigned Rd = fieldFromInstruction32(Insn, 8, 4);
1785 imm |= (fieldFromInstruction32(Insn, 0, 8) << 0);
1786 imm |= (fieldFromInstruction32(Insn, 12, 3) << 8);
1787 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1788 imm |= (fieldFromInstruction32(Insn, 26, 1) << 11);
1790 if (Inst.getOpcode() == ARM::t2MOVTi16)
1791 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1792 return MCDisassembler::Fail;
1793 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1794 return MCDisassembler::Fail;
1796 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1797 Inst.addOperand(MCOperand::CreateImm(imm));
1802 static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1803 uint64_t Address, const void *Decoder) {
1804 DecodeStatus S = MCDisassembler::Success;
1806 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1807 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1810 imm |= (fieldFromInstruction32(Insn, 0, 12) << 0);
1811 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1813 if (Inst.getOpcode() == ARM::MOVTi16)
1814 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1815 return MCDisassembler::Fail;
1816 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1817 return MCDisassembler::Fail;
1819 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1820 Inst.addOperand(MCOperand::CreateImm(imm));
1822 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1823 return MCDisassembler::Fail;
1828 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1829 uint64_t Address, const void *Decoder) {
1830 DecodeStatus S = MCDisassembler::Success;
1832 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1833 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1834 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1835 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1836 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1839 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1841 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1842 return MCDisassembler::Fail;
1843 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1844 return MCDisassembler::Fail;
1845 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1846 return MCDisassembler::Fail;
1847 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1848 return MCDisassembler::Fail;
1850 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1851 return MCDisassembler::Fail;
1856 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1857 uint64_t Address, const void *Decoder) {
1858 DecodeStatus S = MCDisassembler::Success;
1860 unsigned add = fieldFromInstruction32(Val, 12, 1);
1861 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1862 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1864 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1865 return MCDisassembler::Fail;
1867 if (!add) imm *= -1;
1868 if (imm == 0 && !add) imm = INT32_MIN;
1869 Inst.addOperand(MCOperand::CreateImm(imm));
1871 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
1876 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1877 uint64_t Address, const void *Decoder) {
1878 DecodeStatus S = MCDisassembler::Success;
1880 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1881 unsigned U = fieldFromInstruction32(Val, 8, 1);
1882 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1884 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1885 return MCDisassembler::Fail;
1888 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1890 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1895 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1896 uint64_t Address, const void *Decoder) {
1897 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1901 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1902 uint64_t Address, const void *Decoder) {
1903 DecodeStatus S = MCDisassembler::Success;
1905 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1906 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1909 Inst.setOpcode(ARM::BLXi);
1910 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1911 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
1912 true, 4, Inst, Decoder))
1913 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1917 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
1918 true, 4, Inst, Decoder))
1919 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1920 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1921 return MCDisassembler::Fail;
1927 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1928 uint64_t Address, const void *Decoder) {
1929 DecodeStatus S = MCDisassembler::Success;
1931 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1932 unsigned align = fieldFromInstruction32(Val, 4, 2);
1934 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1935 return MCDisassembler::Fail;
1937 Inst.addOperand(MCOperand::CreateImm(0));
1939 Inst.addOperand(MCOperand::CreateImm(4 << align));
1944 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1945 uint64_t Address, const void *Decoder) {
1946 DecodeStatus S = MCDisassembler::Success;
1948 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1949 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1950 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1951 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1952 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1953 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1955 // First output register
1956 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1957 return MCDisassembler::Fail;
1959 // Second output register
1960 switch (Inst.getOpcode()) {
1964 case ARM::VLD3d8_UPD:
1965 case ARM::VLD3d16_UPD:
1966 case ARM::VLD3d32_UPD:
1970 case ARM::VLD4d8_UPD:
1971 case ARM::VLD4d16_UPD:
1972 case ARM::VLD4d32_UPD:
1973 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
1974 return MCDisassembler::Fail;
1979 case ARM::VLD3q8_UPD:
1980 case ARM::VLD3q16_UPD:
1981 case ARM::VLD3q32_UPD:
1985 case ARM::VLD4q8_UPD:
1986 case ARM::VLD4q16_UPD:
1987 case ARM::VLD4q32_UPD:
1988 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1989 return MCDisassembler::Fail;
1994 // Third output register
1995 switch(Inst.getOpcode()) {
1999 case ARM::VLD3d8_UPD:
2000 case ARM::VLD3d16_UPD:
2001 case ARM::VLD3d32_UPD:
2005 case ARM::VLD4d8_UPD:
2006 case ARM::VLD4d16_UPD:
2007 case ARM::VLD4d32_UPD:
2008 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2009 return MCDisassembler::Fail;
2014 case ARM::VLD3q8_UPD:
2015 case ARM::VLD3q16_UPD:
2016 case ARM::VLD3q32_UPD:
2020 case ARM::VLD4q8_UPD:
2021 case ARM::VLD4q16_UPD:
2022 case ARM::VLD4q32_UPD:
2023 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2024 return MCDisassembler::Fail;
2030 // Fourth output register
2031 switch (Inst.getOpcode()) {
2035 case ARM::VLD4d8_UPD:
2036 case ARM::VLD4d16_UPD:
2037 case ARM::VLD4d32_UPD:
2038 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2039 return MCDisassembler::Fail;
2044 case ARM::VLD4q8_UPD:
2045 case ARM::VLD4q16_UPD:
2046 case ARM::VLD4q32_UPD:
2047 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2048 return MCDisassembler::Fail;
2054 // Writeback operand
2055 switch (Inst.getOpcode()) {
2056 case ARM::VLD1d8wb_fixed:
2057 case ARM::VLD1d16wb_fixed:
2058 case ARM::VLD1d32wb_fixed:
2059 case ARM::VLD1d64wb_fixed:
2060 case ARM::VLD1d8wb_register:
2061 case ARM::VLD1d16wb_register:
2062 case ARM::VLD1d32wb_register:
2063 case ARM::VLD1d64wb_register:
2064 case ARM::VLD1q8wb_fixed:
2065 case ARM::VLD1q16wb_fixed:
2066 case ARM::VLD1q32wb_fixed:
2067 case ARM::VLD1q64wb_fixed:
2068 case ARM::VLD1q8wb_register:
2069 case ARM::VLD1q16wb_register:
2070 case ARM::VLD1q32wb_register:
2071 case ARM::VLD1q64wb_register:
2072 case ARM::VLD1d8Twb_fixed:
2073 case ARM::VLD1d8Twb_register:
2074 case ARM::VLD1d16Twb_fixed:
2075 case ARM::VLD1d16Twb_register:
2076 case ARM::VLD1d32Twb_fixed:
2077 case ARM::VLD1d32Twb_register:
2078 case ARM::VLD1d64Twb_fixed:
2079 case ARM::VLD1d64Twb_register:
2080 case ARM::VLD1d8Qwb_fixed:
2081 case ARM::VLD1d8Qwb_register:
2082 case ARM::VLD1d16Qwb_fixed:
2083 case ARM::VLD1d16Qwb_register:
2084 case ARM::VLD1d32Qwb_fixed:
2085 case ARM::VLD1d32Qwb_register:
2086 case ARM::VLD1d64Qwb_fixed:
2087 case ARM::VLD1d64Qwb_register:
2088 case ARM::VLD2d8wb_fixed:
2089 case ARM::VLD2d16wb_fixed:
2090 case ARM::VLD2d32wb_fixed:
2091 case ARM::VLD2q8wb_fixed:
2092 case ARM::VLD2q16wb_fixed:
2093 case ARM::VLD2q32wb_fixed:
2094 case ARM::VLD2d8wb_register:
2095 case ARM::VLD2d16wb_register:
2096 case ARM::VLD2d32wb_register:
2097 case ARM::VLD2q8wb_register:
2098 case ARM::VLD2q16wb_register:
2099 case ARM::VLD2q32wb_register:
2100 case ARM::VLD2b8wb_fixed:
2101 case ARM::VLD2b16wb_fixed:
2102 case ARM::VLD2b32wb_fixed:
2103 case ARM::VLD2b8wb_register:
2104 case ARM::VLD2b16wb_register:
2105 case ARM::VLD2b32wb_register:
2106 case ARM::VLD3d8_UPD:
2107 case ARM::VLD3d16_UPD:
2108 case ARM::VLD3d32_UPD:
2109 case ARM::VLD3q8_UPD:
2110 case ARM::VLD3q16_UPD:
2111 case ARM::VLD3q32_UPD:
2112 case ARM::VLD4d8_UPD:
2113 case ARM::VLD4d16_UPD:
2114 case ARM::VLD4d32_UPD:
2115 case ARM::VLD4q8_UPD:
2116 case ARM::VLD4q16_UPD:
2117 case ARM::VLD4q32_UPD:
2118 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2119 return MCDisassembler::Fail;
2125 // AddrMode6 Base (register+alignment)
2126 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2127 return MCDisassembler::Fail;
2129 // AddrMode6 Offset (register)
2130 switch (Inst.getOpcode()) {
2132 // The below have been updated to have explicit am6offset split
2133 // between fixed and register offset. For those instructions not
2134 // yet updated, we need to add an additional reg0 operand for the
2137 // The fixed offset encodes as Rm == 0xd, so we check for that.
2139 Inst.addOperand(MCOperand::CreateReg(0));
2142 // Fall through to handle the register offset variant.
2143 case ARM::VLD1d8wb_fixed:
2144 case ARM::VLD1d16wb_fixed:
2145 case ARM::VLD1d32wb_fixed:
2146 case ARM::VLD1d64wb_fixed:
2147 case ARM::VLD1d8Twb_fixed:
2148 case ARM::VLD1d16Twb_fixed:
2149 case ARM::VLD1d32Twb_fixed:
2150 case ARM::VLD1d64Twb_fixed:
2151 case ARM::VLD1d8Qwb_fixed:
2152 case ARM::VLD1d16Qwb_fixed:
2153 case ARM::VLD1d32Qwb_fixed:
2154 case ARM::VLD1d64Qwb_fixed:
2155 case ARM::VLD1d8wb_register:
2156 case ARM::VLD1d16wb_register:
2157 case ARM::VLD1d32wb_register:
2158 case ARM::VLD1d64wb_register:
2159 case ARM::VLD1q8wb_fixed:
2160 case ARM::VLD1q16wb_fixed:
2161 case ARM::VLD1q32wb_fixed:
2162 case ARM::VLD1q64wb_fixed:
2163 case ARM::VLD1q8wb_register:
2164 case ARM::VLD1q16wb_register:
2165 case ARM::VLD1q32wb_register:
2166 case ARM::VLD1q64wb_register:
2167 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2168 // variant encodes Rm == 0xf. Anything else is a register offset post-
2169 // increment and we need to add the register operand to the instruction.
2170 if (Rm != 0xD && Rm != 0xF &&
2171 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2172 return MCDisassembler::Fail;
2179 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
2180 uint64_t Address, const void *Decoder) {
2181 DecodeStatus S = MCDisassembler::Success;
2183 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2184 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2185 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
2186 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2187 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2188 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2190 // Writeback Operand
2191 switch (Inst.getOpcode()) {
2192 case ARM::VST1d8wb_fixed:
2193 case ARM::VST1d16wb_fixed:
2194 case ARM::VST1d32wb_fixed:
2195 case ARM::VST1d64wb_fixed:
2196 case ARM::VST1d8wb_register:
2197 case ARM::VST1d16wb_register:
2198 case ARM::VST1d32wb_register:
2199 case ARM::VST1d64wb_register:
2200 case ARM::VST1q8wb_fixed:
2201 case ARM::VST1q16wb_fixed:
2202 case ARM::VST1q32wb_fixed:
2203 case ARM::VST1q64wb_fixed:
2204 case ARM::VST1q8wb_register:
2205 case ARM::VST1q16wb_register:
2206 case ARM::VST1q32wb_register:
2207 case ARM::VST1q64wb_register:
2208 case ARM::VST1d8Twb_fixed:
2209 case ARM::VST1d16Twb_fixed:
2210 case ARM::VST1d32Twb_fixed:
2211 case ARM::VST1d64Twb_fixed:
2212 case ARM::VST1d8Twb_register:
2213 case ARM::VST1d16Twb_register:
2214 case ARM::VST1d32Twb_register:
2215 case ARM::VST1d64Twb_register:
2216 case ARM::VST1d8Qwb_fixed:
2217 case ARM::VST1d16Qwb_fixed:
2218 case ARM::VST1d32Qwb_fixed:
2219 case ARM::VST1d64Qwb_fixed:
2220 case ARM::VST1d8Qwb_register:
2221 case ARM::VST1d16Qwb_register:
2222 case ARM::VST1d32Qwb_register:
2223 case ARM::VST1d64Qwb_register:
2224 case ARM::VST2d8wb_fixed:
2225 case ARM::VST2d16wb_fixed:
2226 case ARM::VST2d32wb_fixed:
2227 case ARM::VST2d8wb_register:
2228 case ARM::VST2d16wb_register:
2229 case ARM::VST2d32wb_register:
2230 case ARM::VST2q8wb_fixed:
2231 case ARM::VST2q16wb_fixed:
2232 case ARM::VST2q32wb_fixed:
2233 case ARM::VST2q8wb_register:
2234 case ARM::VST2q16wb_register:
2235 case ARM::VST2q32wb_register:
2236 case ARM::VST2b8wb_fixed:
2237 case ARM::VST2b16wb_fixed:
2238 case ARM::VST2b32wb_fixed:
2239 case ARM::VST2b8wb_register:
2240 case ARM::VST2b16wb_register:
2241 case ARM::VST2b32wb_register:
2242 case ARM::VST3d8_UPD:
2243 case ARM::VST3d16_UPD:
2244 case ARM::VST3d32_UPD:
2245 case ARM::VST3q8_UPD:
2246 case ARM::VST3q16_UPD:
2247 case ARM::VST3q32_UPD:
2248 case ARM::VST4d8_UPD:
2249 case ARM::VST4d16_UPD:
2250 case ARM::VST4d32_UPD:
2251 case ARM::VST4q8_UPD:
2252 case ARM::VST4q16_UPD:
2253 case ARM::VST4q32_UPD:
2254 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2255 return MCDisassembler::Fail;
2261 // AddrMode6 Base (register+alignment)
2262 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2263 return MCDisassembler::Fail;
2265 // AddrMode6 Offset (register)
2266 switch (Inst.getOpcode()) {
2269 Inst.addOperand(MCOperand::CreateReg(0));
2270 else if (Rm != 0xF) {
2271 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2272 return MCDisassembler::Fail;
2275 case ARM::VST1d8wb_fixed:
2276 case ARM::VST1d16wb_fixed:
2277 case ARM::VST1d32wb_fixed:
2278 case ARM::VST1d64wb_fixed:
2279 case ARM::VST1q8wb_fixed:
2280 case ARM::VST1q16wb_fixed:
2281 case ARM::VST1q32wb_fixed:
2282 case ARM::VST1q64wb_fixed:
2287 // First input register
2288 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2289 return MCDisassembler::Fail;
2291 // Second input register
2292 switch (Inst.getOpcode()) {
2296 case ARM::VST3d8_UPD:
2297 case ARM::VST3d16_UPD:
2298 case ARM::VST3d32_UPD:
2302 case ARM::VST4d8_UPD:
2303 case ARM::VST4d16_UPD:
2304 case ARM::VST4d32_UPD:
2305 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2306 return MCDisassembler::Fail;
2311 case ARM::VST3q8_UPD:
2312 case ARM::VST3q16_UPD:
2313 case ARM::VST3q32_UPD:
2317 case ARM::VST4q8_UPD:
2318 case ARM::VST4q16_UPD:
2319 case ARM::VST4q32_UPD:
2320 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2321 return MCDisassembler::Fail;
2327 // Third input register
2328 switch (Inst.getOpcode()) {
2332 case ARM::VST3d8_UPD:
2333 case ARM::VST3d16_UPD:
2334 case ARM::VST3d32_UPD:
2338 case ARM::VST4d8_UPD:
2339 case ARM::VST4d16_UPD:
2340 case ARM::VST4d32_UPD:
2341 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2342 return MCDisassembler::Fail;
2347 case ARM::VST3q8_UPD:
2348 case ARM::VST3q16_UPD:
2349 case ARM::VST3q32_UPD:
2353 case ARM::VST4q8_UPD:
2354 case ARM::VST4q16_UPD:
2355 case ARM::VST4q32_UPD:
2356 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2357 return MCDisassembler::Fail;
2363 // Fourth input register
2364 switch (Inst.getOpcode()) {
2368 case ARM::VST4d8_UPD:
2369 case ARM::VST4d16_UPD:
2370 case ARM::VST4d32_UPD:
2371 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2372 return MCDisassembler::Fail;
2377 case ARM::VST4q8_UPD:
2378 case ARM::VST4q16_UPD:
2379 case ARM::VST4q32_UPD:
2380 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2381 return MCDisassembler::Fail;
2390 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2391 uint64_t Address, const void *Decoder) {
2392 DecodeStatus S = MCDisassembler::Success;
2394 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2395 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2396 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2397 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2398 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2399 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2401 align *= (1 << size);
2403 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2404 return MCDisassembler::Fail;
2406 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2407 return MCDisassembler::Fail;
2410 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2411 return MCDisassembler::Fail;
2412 Inst.addOperand(MCOperand::CreateImm(align));
2414 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2415 // variant encodes Rm == 0xf. Anything else is a register offset post-
2416 // increment and we need to add the register operand to the instruction.
2417 if (Rm != 0xD && Rm != 0xF &&
2418 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2419 return MCDisassembler::Fail;
2424 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2425 uint64_t Address, const void *Decoder) {
2426 DecodeStatus S = MCDisassembler::Success;
2428 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2429 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2430 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2431 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2432 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2433 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2434 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2437 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2438 return MCDisassembler::Fail;
2439 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2440 return MCDisassembler::Fail;
2442 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2443 return MCDisassembler::Fail;
2446 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2447 return MCDisassembler::Fail;
2448 Inst.addOperand(MCOperand::CreateImm(align));
2451 Inst.addOperand(MCOperand::CreateReg(0));
2452 else if (Rm != 0xF) {
2453 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2454 return MCDisassembler::Fail;
2460 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2461 uint64_t Address, const void *Decoder) {
2462 DecodeStatus S = MCDisassembler::Success;
2464 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2465 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2466 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2467 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2468 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2470 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2471 return MCDisassembler::Fail;
2472 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2473 return MCDisassembler::Fail;
2474 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2475 return MCDisassembler::Fail;
2477 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2478 return MCDisassembler::Fail;
2481 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2482 return MCDisassembler::Fail;
2483 Inst.addOperand(MCOperand::CreateImm(0));
2486 Inst.addOperand(MCOperand::CreateReg(0));
2487 else if (Rm != 0xF) {
2488 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2489 return MCDisassembler::Fail;
2495 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2496 uint64_t Address, const void *Decoder) {
2497 DecodeStatus S = MCDisassembler::Success;
2499 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2500 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2501 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2502 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2503 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2504 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2505 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2520 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2521 return MCDisassembler::Fail;
2522 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2523 return MCDisassembler::Fail;
2524 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2525 return MCDisassembler::Fail;
2526 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2527 return MCDisassembler::Fail;
2529 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2530 return MCDisassembler::Fail;
2533 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2534 return MCDisassembler::Fail;
2535 Inst.addOperand(MCOperand::CreateImm(align));
2538 Inst.addOperand(MCOperand::CreateReg(0));
2539 else if (Rm != 0xF) {
2540 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2541 return MCDisassembler::Fail;
2548 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2549 uint64_t Address, const void *Decoder) {
2550 DecodeStatus S = MCDisassembler::Success;
2552 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2553 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2554 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2555 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2556 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2557 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2558 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2559 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2562 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2563 return MCDisassembler::Fail;
2565 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2566 return MCDisassembler::Fail;
2569 Inst.addOperand(MCOperand::CreateImm(imm));
2571 switch (Inst.getOpcode()) {
2572 case ARM::VORRiv4i16:
2573 case ARM::VORRiv2i32:
2574 case ARM::VBICiv4i16:
2575 case ARM::VBICiv2i32:
2576 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2577 return MCDisassembler::Fail;
2579 case ARM::VORRiv8i16:
2580 case ARM::VORRiv4i32:
2581 case ARM::VBICiv8i16:
2582 case ARM::VBICiv4i32:
2583 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2584 return MCDisassembler::Fail;
2593 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2594 uint64_t Address, const void *Decoder) {
2595 DecodeStatus S = MCDisassembler::Success;
2597 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2598 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2599 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2600 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2601 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2603 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2604 return MCDisassembler::Fail;
2605 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2606 return MCDisassembler::Fail;
2607 Inst.addOperand(MCOperand::CreateImm(8 << size));
2612 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2613 uint64_t Address, const void *Decoder) {
2614 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2615 return MCDisassembler::Success;
2618 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2619 uint64_t Address, const void *Decoder) {
2620 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2621 return MCDisassembler::Success;
2624 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2625 uint64_t Address, const void *Decoder) {
2626 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2627 return MCDisassembler::Success;
2630 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2631 uint64_t Address, const void *Decoder) {
2632 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2633 return MCDisassembler::Success;
2636 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2637 uint64_t Address, const void *Decoder) {
2638 DecodeStatus S = MCDisassembler::Success;
2640 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2641 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2642 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2643 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2644 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2645 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2646 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2648 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2649 return MCDisassembler::Fail;
2651 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2652 return MCDisassembler::Fail; // Writeback
2655 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
2656 return MCDisassembler::Fail;
2658 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2659 return MCDisassembler::Fail;
2664 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2665 uint64_t Address, const void *Decoder) {
2666 DecodeStatus S = MCDisassembler::Success;
2668 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2669 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2671 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2672 return MCDisassembler::Fail;
2674 switch(Inst.getOpcode()) {
2676 return MCDisassembler::Fail;
2678 break; // tADR does not explicitly represent the PC as an operand.
2680 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2684 Inst.addOperand(MCOperand::CreateImm(imm));
2688 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2689 uint64_t Address, const void *Decoder) {
2690 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2691 return MCDisassembler::Success;
2694 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2695 uint64_t Address, const void *Decoder) {
2696 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2697 return MCDisassembler::Success;
2700 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2701 uint64_t Address, const void *Decoder) {
2702 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2703 return MCDisassembler::Success;
2706 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2707 uint64_t Address, const void *Decoder) {
2708 DecodeStatus S = MCDisassembler::Success;
2710 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2711 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2713 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2714 return MCDisassembler::Fail;
2715 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2716 return MCDisassembler::Fail;
2721 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2722 uint64_t Address, const void *Decoder) {
2723 DecodeStatus S = MCDisassembler::Success;
2725 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2726 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2728 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2729 return MCDisassembler::Fail;
2730 Inst.addOperand(MCOperand::CreateImm(imm));
2735 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2736 uint64_t Address, const void *Decoder) {
2737 unsigned imm = Val << 2;
2739 Inst.addOperand(MCOperand::CreateImm(imm));
2740 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
2742 return MCDisassembler::Success;
2745 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2746 uint64_t Address, const void *Decoder) {
2747 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2748 Inst.addOperand(MCOperand::CreateImm(Val));
2750 return MCDisassembler::Success;
2753 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2754 uint64_t Address, const void *Decoder) {
2755 DecodeStatus S = MCDisassembler::Success;
2757 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2758 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2759 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2761 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2762 return MCDisassembler::Fail;
2763 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2764 return MCDisassembler::Fail;
2765 Inst.addOperand(MCOperand::CreateImm(imm));
2770 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2771 uint64_t Address, const void *Decoder) {
2772 DecodeStatus S = MCDisassembler::Success;
2774 switch (Inst.getOpcode()) {
2780 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2781 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2782 return MCDisassembler::Fail;
2786 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2788 switch (Inst.getOpcode()) {
2790 Inst.setOpcode(ARM::t2LDRBpci);
2793 Inst.setOpcode(ARM::t2LDRHpci);
2796 Inst.setOpcode(ARM::t2LDRSHpci);
2799 Inst.setOpcode(ARM::t2LDRSBpci);
2802 Inst.setOpcode(ARM::t2PLDi12);
2803 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2806 return MCDisassembler::Fail;
2809 int imm = fieldFromInstruction32(Insn, 0, 12);
2810 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2811 Inst.addOperand(MCOperand::CreateImm(imm));
2816 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2817 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2818 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2819 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2820 return MCDisassembler::Fail;
2825 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2826 uint64_t Address, const void *Decoder) {
2827 int imm = Val & 0xFF;
2828 if (!(Val & 0x100)) imm *= -1;
2829 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2831 return MCDisassembler::Success;
2834 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2835 uint64_t Address, const void *Decoder) {
2836 DecodeStatus S = MCDisassembler::Success;
2838 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2839 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2841 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2842 return MCDisassembler::Fail;
2843 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2844 return MCDisassembler::Fail;
2849 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
2850 uint64_t Address, const void *Decoder) {
2851 DecodeStatus S = MCDisassembler::Success;
2853 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
2854 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2856 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2857 return MCDisassembler::Fail;
2859 Inst.addOperand(MCOperand::CreateImm(imm));
2864 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2865 uint64_t Address, const void *Decoder) {
2866 int imm = Val & 0xFF;
2869 else if (!(Val & 0x100))
2871 Inst.addOperand(MCOperand::CreateImm(imm));
2873 return MCDisassembler::Success;
2877 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2878 uint64_t Address, const void *Decoder) {
2879 DecodeStatus S = MCDisassembler::Success;
2881 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2882 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2884 // Some instructions always use an additive offset.
2885 switch (Inst.getOpcode()) {
2900 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2901 return MCDisassembler::Fail;
2902 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2903 return MCDisassembler::Fail;
2908 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn,
2909 uint64_t Address, const void *Decoder) {
2910 DecodeStatus S = MCDisassembler::Success;
2912 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2913 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2914 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
2915 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
2917 unsigned load = fieldFromInstruction32(Insn, 20, 1);
2920 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2921 return MCDisassembler::Fail;
2924 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2925 return MCDisassembler::Fail;
2928 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2929 return MCDisassembler::Fail;
2932 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
2933 return MCDisassembler::Fail;
2938 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2939 uint64_t Address, const void *Decoder) {
2940 DecodeStatus S = MCDisassembler::Success;
2942 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2943 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2945 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2946 return MCDisassembler::Fail;
2947 Inst.addOperand(MCOperand::CreateImm(imm));
2953 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2954 uint64_t Address, const void *Decoder) {
2955 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2957 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2958 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2959 Inst.addOperand(MCOperand::CreateImm(imm));
2961 return MCDisassembler::Success;
2964 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2965 uint64_t Address, const void *Decoder) {
2966 DecodeStatus S = MCDisassembler::Success;
2968 if (Inst.getOpcode() == ARM::tADDrSP) {
2969 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2970 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2972 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2973 return MCDisassembler::Fail;
2974 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2975 return MCDisassembler::Fail;
2976 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2977 } else if (Inst.getOpcode() == ARM::tADDspr) {
2978 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2980 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2981 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2982 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2983 return MCDisassembler::Fail;
2989 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2990 uint64_t Address, const void *Decoder) {
2991 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2992 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2994 Inst.addOperand(MCOperand::CreateImm(imod));
2995 Inst.addOperand(MCOperand::CreateImm(flags));
2997 return MCDisassembler::Success;
3000 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
3001 uint64_t Address, const void *Decoder) {
3002 DecodeStatus S = MCDisassembler::Success;
3003 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3004 unsigned add = fieldFromInstruction32(Insn, 4, 1);
3006 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3007 return MCDisassembler::Fail;
3008 Inst.addOperand(MCOperand::CreateImm(add));
3013 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
3014 uint64_t Address, const void *Decoder) {
3015 if (!tryAddingSymbolicOperand(Address,
3016 (Address & ~2u) + SignExtend32<22>(Val << 1) + 4,
3017 true, 4, Inst, Decoder))
3018 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3019 return MCDisassembler::Success;
3022 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
3023 uint64_t Address, const void *Decoder) {
3024 if (Val == 0xA || Val == 0xB)
3025 return MCDisassembler::Fail;
3027 Inst.addOperand(MCOperand::CreateImm(Val));
3028 return MCDisassembler::Success;
3032 DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Insn,
3033 uint64_t Address, const void *Decoder) {
3034 DecodeStatus S = MCDisassembler::Success;
3036 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3037 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3039 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3040 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3041 return MCDisassembler::Fail;
3042 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3043 return MCDisassembler::Fail;
3048 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
3049 uint64_t Address, const void *Decoder) {
3050 DecodeStatus S = MCDisassembler::Success;
3052 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
3053 if (pred == 0xE || pred == 0xF) {
3054 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
3057 return MCDisassembler::Fail;
3059 Inst.setOpcode(ARM::t2DSB);
3062 Inst.setOpcode(ARM::t2DMB);
3065 Inst.setOpcode(ARM::t2ISB);
3069 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
3070 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3073 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
3074 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
3075 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
3076 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
3077 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
3079 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3080 return MCDisassembler::Fail;
3081 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3082 return MCDisassembler::Fail;
3087 // Decode a shifted immediate operand. These basically consist
3088 // of an 8-bit value, and a 4-bit directive that specifies either
3089 // a splat operation or a rotation.
3090 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
3091 uint64_t Address, const void *Decoder) {
3092 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
3094 unsigned byte = fieldFromInstruction32(Val, 8, 2);
3095 unsigned imm = fieldFromInstruction32(Val, 0, 8);
3098 Inst.addOperand(MCOperand::CreateImm(imm));
3101 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3104 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3107 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3112 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
3113 unsigned rot = fieldFromInstruction32(Val, 7, 5);
3114 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3115 Inst.addOperand(MCOperand::CreateImm(imm));
3118 return MCDisassembler::Success;
3122 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
3123 uint64_t Address, const void *Decoder){
3124 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3125 return MCDisassembler::Success;
3128 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
3129 uint64_t Address, const void *Decoder){
3130 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<22>(Val<<1) + 4,
3131 true, 4, Inst, Decoder))
3132 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3133 return MCDisassembler::Success;
3136 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
3137 uint64_t Address, const void *Decoder) {
3140 return MCDisassembler::Fail;
3152 Inst.addOperand(MCOperand::CreateImm(Val));
3153 return MCDisassembler::Success;
3156 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
3157 uint64_t Address, const void *Decoder) {
3158 if (!Val) return MCDisassembler::Fail;
3159 Inst.addOperand(MCOperand::CreateImm(Val));
3160 return MCDisassembler::Success;
3163 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
3164 uint64_t Address, const void *Decoder) {
3165 DecodeStatus S = MCDisassembler::Success;
3167 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3168 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3169 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3171 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3173 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3174 return MCDisassembler::Fail;
3175 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3176 return MCDisassembler::Fail;
3177 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3178 return MCDisassembler::Fail;
3179 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3180 return MCDisassembler::Fail;
3186 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
3187 uint64_t Address, const void *Decoder){
3188 DecodeStatus S = MCDisassembler::Success;
3190 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3191 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3192 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3193 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3195 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3196 return MCDisassembler::Fail;
3198 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3199 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3201 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3202 return MCDisassembler::Fail;
3203 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3204 return MCDisassembler::Fail;
3205 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3206 return MCDisassembler::Fail;
3207 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3208 return MCDisassembler::Fail;
3213 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
3214 uint64_t Address, const void *Decoder) {
3215 DecodeStatus S = MCDisassembler::Success;
3217 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3218 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3219 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3220 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3221 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3222 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3224 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3226 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3227 return MCDisassembler::Fail;
3228 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3229 return MCDisassembler::Fail;
3230 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3231 return MCDisassembler::Fail;
3232 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3233 return MCDisassembler::Fail;
3238 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
3239 uint64_t Address, const void *Decoder) {
3240 DecodeStatus S = MCDisassembler::Success;
3242 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3243 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3244 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3245 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3246 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3247 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3248 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3250 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3251 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3253 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3254 return MCDisassembler::Fail;
3255 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3256 return MCDisassembler::Fail;
3257 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3258 return MCDisassembler::Fail;
3259 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3260 return MCDisassembler::Fail;
3266 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3267 uint64_t Address, const void *Decoder) {
3268 DecodeStatus S = MCDisassembler::Success;
3270 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3271 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3272 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3273 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3274 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3275 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3277 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3279 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3280 return MCDisassembler::Fail;
3281 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3282 return MCDisassembler::Fail;
3283 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3284 return MCDisassembler::Fail;
3285 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3286 return MCDisassembler::Fail;
3291 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3292 uint64_t Address, const void *Decoder) {
3293 DecodeStatus S = MCDisassembler::Success;
3295 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3296 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3297 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3298 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3299 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3300 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3302 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3304 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3305 return MCDisassembler::Fail;
3306 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3307 return MCDisassembler::Fail;
3308 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3309 return MCDisassembler::Fail;
3310 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3311 return MCDisassembler::Fail;
3316 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3317 uint64_t Address, const void *Decoder) {
3318 DecodeStatus S = MCDisassembler::Success;
3320 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3321 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3322 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3323 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3324 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3330 return MCDisassembler::Fail;
3332 if (fieldFromInstruction32(Insn, 4, 1))
3333 return MCDisassembler::Fail; // UNDEFINED
3334 index = fieldFromInstruction32(Insn, 5, 3);
3337 if (fieldFromInstruction32(Insn, 5, 1))
3338 return MCDisassembler::Fail; // UNDEFINED
3339 index = fieldFromInstruction32(Insn, 6, 2);
3340 if (fieldFromInstruction32(Insn, 4, 1))
3344 if (fieldFromInstruction32(Insn, 6, 1))
3345 return MCDisassembler::Fail; // UNDEFINED
3346 index = fieldFromInstruction32(Insn, 7, 1);
3347 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3351 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3352 return MCDisassembler::Fail;
3353 if (Rm != 0xF) { // Writeback
3354 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3355 return MCDisassembler::Fail;
3357 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3358 return MCDisassembler::Fail;
3359 Inst.addOperand(MCOperand::CreateImm(align));
3362 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3363 return MCDisassembler::Fail;
3365 Inst.addOperand(MCOperand::CreateReg(0));
3368 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3369 return MCDisassembler::Fail;
3370 Inst.addOperand(MCOperand::CreateImm(index));
3375 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3376 uint64_t Address, const void *Decoder) {
3377 DecodeStatus S = MCDisassembler::Success;
3379 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3380 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3381 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3382 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3383 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3389 return MCDisassembler::Fail;
3391 if (fieldFromInstruction32(Insn, 4, 1))
3392 return MCDisassembler::Fail; // UNDEFINED
3393 index = fieldFromInstruction32(Insn, 5, 3);
3396 if (fieldFromInstruction32(Insn, 5, 1))
3397 return MCDisassembler::Fail; // UNDEFINED
3398 index = fieldFromInstruction32(Insn, 6, 2);
3399 if (fieldFromInstruction32(Insn, 4, 1))
3403 if (fieldFromInstruction32(Insn, 6, 1))
3404 return MCDisassembler::Fail; // UNDEFINED
3405 index = fieldFromInstruction32(Insn, 7, 1);
3406 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3410 if (Rm != 0xF) { // Writeback
3411 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3412 return MCDisassembler::Fail;
3414 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3415 return MCDisassembler::Fail;
3416 Inst.addOperand(MCOperand::CreateImm(align));
3419 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3420 return MCDisassembler::Fail;
3422 Inst.addOperand(MCOperand::CreateReg(0));
3425 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3426 return MCDisassembler::Fail;
3427 Inst.addOperand(MCOperand::CreateImm(index));
3433 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3434 uint64_t Address, const void *Decoder) {
3435 DecodeStatus S = MCDisassembler::Success;
3437 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3438 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3439 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3440 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3441 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3448 return MCDisassembler::Fail;
3450 index = fieldFromInstruction32(Insn, 5, 3);
3451 if (fieldFromInstruction32(Insn, 4, 1))
3455 index = fieldFromInstruction32(Insn, 6, 2);
3456 if (fieldFromInstruction32(Insn, 4, 1))
3458 if (fieldFromInstruction32(Insn, 5, 1))
3462 if (fieldFromInstruction32(Insn, 5, 1))
3463 return MCDisassembler::Fail; // UNDEFINED
3464 index = fieldFromInstruction32(Insn, 7, 1);
3465 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3467 if (fieldFromInstruction32(Insn, 6, 1))
3472 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3473 return MCDisassembler::Fail;
3474 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3475 return MCDisassembler::Fail;
3476 if (Rm != 0xF) { // Writeback
3477 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3478 return MCDisassembler::Fail;
3480 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3481 return MCDisassembler::Fail;
3482 Inst.addOperand(MCOperand::CreateImm(align));
3485 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3486 return MCDisassembler::Fail;
3488 Inst.addOperand(MCOperand::CreateReg(0));
3491 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3492 return MCDisassembler::Fail;
3493 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3494 return MCDisassembler::Fail;
3495 Inst.addOperand(MCOperand::CreateImm(index));
3500 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3501 uint64_t Address, const void *Decoder) {
3502 DecodeStatus S = MCDisassembler::Success;
3504 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3505 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3506 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3507 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3508 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3515 return MCDisassembler::Fail;
3517 index = fieldFromInstruction32(Insn, 5, 3);
3518 if (fieldFromInstruction32(Insn, 4, 1))
3522 index = fieldFromInstruction32(Insn, 6, 2);
3523 if (fieldFromInstruction32(Insn, 4, 1))
3525 if (fieldFromInstruction32(Insn, 5, 1))
3529 if (fieldFromInstruction32(Insn, 5, 1))
3530 return MCDisassembler::Fail; // UNDEFINED
3531 index = fieldFromInstruction32(Insn, 7, 1);
3532 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3534 if (fieldFromInstruction32(Insn, 6, 1))
3539 if (Rm != 0xF) { // Writeback
3540 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3541 return MCDisassembler::Fail;
3543 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3544 return MCDisassembler::Fail;
3545 Inst.addOperand(MCOperand::CreateImm(align));
3548 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3549 return MCDisassembler::Fail;
3551 Inst.addOperand(MCOperand::CreateReg(0));
3554 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3555 return MCDisassembler::Fail;
3556 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3557 return MCDisassembler::Fail;
3558 Inst.addOperand(MCOperand::CreateImm(index));
3564 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3565 uint64_t Address, const void *Decoder) {
3566 DecodeStatus S = MCDisassembler::Success;
3568 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3569 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3570 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3571 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3572 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3579 return MCDisassembler::Fail;
3581 if (fieldFromInstruction32(Insn, 4, 1))
3582 return MCDisassembler::Fail; // UNDEFINED
3583 index = fieldFromInstruction32(Insn, 5, 3);
3586 if (fieldFromInstruction32(Insn, 4, 1))
3587 return MCDisassembler::Fail; // UNDEFINED
3588 index = fieldFromInstruction32(Insn, 6, 2);
3589 if (fieldFromInstruction32(Insn, 5, 1))
3593 if (fieldFromInstruction32(Insn, 4, 2))
3594 return MCDisassembler::Fail; // UNDEFINED
3595 index = fieldFromInstruction32(Insn, 7, 1);
3596 if (fieldFromInstruction32(Insn, 6, 1))
3601 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3602 return MCDisassembler::Fail;
3603 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3604 return MCDisassembler::Fail;
3605 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3606 return MCDisassembler::Fail;
3608 if (Rm != 0xF) { // Writeback
3609 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3610 return MCDisassembler::Fail;
3612 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3613 return MCDisassembler::Fail;
3614 Inst.addOperand(MCOperand::CreateImm(align));
3617 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3618 return MCDisassembler::Fail;
3620 Inst.addOperand(MCOperand::CreateReg(0));
3623 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3624 return MCDisassembler::Fail;
3625 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3626 return MCDisassembler::Fail;
3627 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3628 return MCDisassembler::Fail;
3629 Inst.addOperand(MCOperand::CreateImm(index));
3634 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3635 uint64_t Address, const void *Decoder) {
3636 DecodeStatus S = MCDisassembler::Success;
3638 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3639 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3640 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3641 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3642 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3649 return MCDisassembler::Fail;
3651 if (fieldFromInstruction32(Insn, 4, 1))
3652 return MCDisassembler::Fail; // UNDEFINED
3653 index = fieldFromInstruction32(Insn, 5, 3);
3656 if (fieldFromInstruction32(Insn, 4, 1))
3657 return MCDisassembler::Fail; // UNDEFINED
3658 index = fieldFromInstruction32(Insn, 6, 2);
3659 if (fieldFromInstruction32(Insn, 5, 1))
3663 if (fieldFromInstruction32(Insn, 4, 2))
3664 return MCDisassembler::Fail; // UNDEFINED
3665 index = fieldFromInstruction32(Insn, 7, 1);
3666 if (fieldFromInstruction32(Insn, 6, 1))
3671 if (Rm != 0xF) { // Writeback
3672 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3673 return MCDisassembler::Fail;
3675 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3676 return MCDisassembler::Fail;
3677 Inst.addOperand(MCOperand::CreateImm(align));
3680 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3681 return MCDisassembler::Fail;
3683 Inst.addOperand(MCOperand::CreateReg(0));
3686 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3687 return MCDisassembler::Fail;
3688 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3689 return MCDisassembler::Fail;
3690 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3691 return MCDisassembler::Fail;
3692 Inst.addOperand(MCOperand::CreateImm(index));
3698 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3699 uint64_t Address, const void *Decoder) {
3700 DecodeStatus S = MCDisassembler::Success;
3702 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3703 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3704 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3705 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3706 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3713 return MCDisassembler::Fail;
3715 if (fieldFromInstruction32(Insn, 4, 1))
3717 index = fieldFromInstruction32(Insn, 5, 3);
3720 if (fieldFromInstruction32(Insn, 4, 1))
3722 index = fieldFromInstruction32(Insn, 6, 2);
3723 if (fieldFromInstruction32(Insn, 5, 1))
3727 if (fieldFromInstruction32(Insn, 4, 2))
3728 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3729 index = fieldFromInstruction32(Insn, 7, 1);
3730 if (fieldFromInstruction32(Insn, 6, 1))
3735 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3736 return MCDisassembler::Fail;
3737 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3738 return MCDisassembler::Fail;
3739 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3740 return MCDisassembler::Fail;
3741 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3742 return MCDisassembler::Fail;
3744 if (Rm != 0xF) { // Writeback
3745 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3746 return MCDisassembler::Fail;
3748 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3749 return MCDisassembler::Fail;
3750 Inst.addOperand(MCOperand::CreateImm(align));
3753 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3754 return MCDisassembler::Fail;
3756 Inst.addOperand(MCOperand::CreateReg(0));
3759 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3760 return MCDisassembler::Fail;
3761 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3762 return MCDisassembler::Fail;
3763 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3764 return MCDisassembler::Fail;
3765 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3766 return MCDisassembler::Fail;
3767 Inst.addOperand(MCOperand::CreateImm(index));
3772 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3773 uint64_t Address, const void *Decoder) {
3774 DecodeStatus S = MCDisassembler::Success;
3776 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3777 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3778 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3779 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3780 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3787 return MCDisassembler::Fail;
3789 if (fieldFromInstruction32(Insn, 4, 1))
3791 index = fieldFromInstruction32(Insn, 5, 3);
3794 if (fieldFromInstruction32(Insn, 4, 1))
3796 index = fieldFromInstruction32(Insn, 6, 2);
3797 if (fieldFromInstruction32(Insn, 5, 1))
3801 if (fieldFromInstruction32(Insn, 4, 2))
3802 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3803 index = fieldFromInstruction32(Insn, 7, 1);
3804 if (fieldFromInstruction32(Insn, 6, 1))
3809 if (Rm != 0xF) { // Writeback
3810 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3811 return MCDisassembler::Fail;
3813 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3814 return MCDisassembler::Fail;
3815 Inst.addOperand(MCOperand::CreateImm(align));
3818 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3819 return MCDisassembler::Fail;
3821 Inst.addOperand(MCOperand::CreateReg(0));
3824 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3825 return MCDisassembler::Fail;
3826 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3827 return MCDisassembler::Fail;
3828 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3829 return MCDisassembler::Fail;
3830 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3831 return MCDisassembler::Fail;
3832 Inst.addOperand(MCOperand::CreateImm(index));
3837 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
3838 uint64_t Address, const void *Decoder) {
3839 DecodeStatus S = MCDisassembler::Success;
3840 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3841 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3842 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3843 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3844 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3846 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3847 S = MCDisassembler::SoftFail;
3849 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3850 return MCDisassembler::Fail;
3851 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3852 return MCDisassembler::Fail;
3853 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3854 return MCDisassembler::Fail;
3855 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3856 return MCDisassembler::Fail;
3857 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3858 return MCDisassembler::Fail;
3863 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3864 uint64_t Address, const void *Decoder) {
3865 DecodeStatus S = MCDisassembler::Success;
3866 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3867 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3868 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3869 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3870 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3872 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3873 S = MCDisassembler::SoftFail;
3875 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3876 return MCDisassembler::Fail;
3877 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3878 return MCDisassembler::Fail;
3879 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3880 return MCDisassembler::Fail;
3881 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3882 return MCDisassembler::Fail;
3883 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3884 return MCDisassembler::Fail;
3889 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3890 uint64_t Address, const void *Decoder) {
3891 DecodeStatus S = MCDisassembler::Success;
3892 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3893 // The InstPrinter needs to have the low bit of the predicate in
3894 // the mask operand to be able to print it properly.
3895 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3899 S = MCDisassembler::SoftFail;
3902 if ((mask & 0xF) == 0) {
3903 // Preserve the high bit of the mask, which is the low bit of
3907 S = MCDisassembler::SoftFail;
3910 Inst.addOperand(MCOperand::CreateImm(pred));
3911 Inst.addOperand(MCOperand::CreateImm(mask));
3916 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3917 uint64_t Address, const void *Decoder) {
3918 DecodeStatus S = MCDisassembler::Success;
3920 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3921 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3922 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3923 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3924 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3925 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3926 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3927 bool writeback = (W == 1) | (P == 0);
3929 addr |= (U << 8) | (Rn << 9);
3931 if (writeback && (Rn == Rt || Rn == Rt2))
3932 Check(S, MCDisassembler::SoftFail);
3934 Check(S, MCDisassembler::SoftFail);
3937 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3938 return MCDisassembler::Fail;
3940 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3941 return MCDisassembler::Fail;
3942 // Writeback operand
3943 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3944 return MCDisassembler::Fail;
3946 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3947 return MCDisassembler::Fail;
3953 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3954 uint64_t Address, const void *Decoder) {
3955 DecodeStatus S = MCDisassembler::Success;
3957 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3958 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3959 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3960 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3961 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3962 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3963 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3964 bool writeback = (W == 1) | (P == 0);
3966 addr |= (U << 8) | (Rn << 9);
3968 if (writeback && (Rn == Rt || Rn == Rt2))
3969 Check(S, MCDisassembler::SoftFail);
3971 // Writeback operand
3972 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3973 return MCDisassembler::Fail;
3975 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3976 return MCDisassembler::Fail;
3978 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3979 return MCDisassembler::Fail;
3981 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3982 return MCDisassembler::Fail;
3987 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn,
3988 uint64_t Address, const void *Decoder) {
3989 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
3990 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
3991 if (sign1 != sign2) return MCDisassembler::Fail;
3993 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
3994 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
3995 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
3997 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
3999 return MCDisassembler::Success;
4002 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, uint32_t Val,
4004 const void *Decoder) {
4005 DecodeStatus S = MCDisassembler::Success;
4007 // Shift of "asr #32" is not allowed in Thumb2 mode.
4008 if (Val == 0x20) S = MCDisassembler::SoftFail;
4009 Inst.addOperand(MCOperand::CreateImm(Val));
4013 static DecodeStatus DecodeSwap(llvm::MCInst &Inst, unsigned Insn,
4014 uint64_t Address, const void *Decoder) {
4015 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4016 unsigned Rt2 = fieldFromInstruction32(Insn, 0, 4);
4017 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4018 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
4021 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4023 DecodeStatus S = MCDisassembler::Success;
4024 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4025 return MCDisassembler::Fail;
4026 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4027 return MCDisassembler::Fail;
4028 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4029 return MCDisassembler::Fail;
4030 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4031 return MCDisassembler::Fail;
4036 static DecodeStatus DecodeVCVTD(llvm::MCInst &Inst, unsigned Insn,
4037 uint64_t Address, const void *Decoder) {
4038 unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
4039 Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
4040 unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
4041 Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
4042 unsigned imm = fieldFromInstruction32(Insn, 16, 6);
4043 unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
4045 DecodeStatus S = MCDisassembler::Success;
4047 // VMOVv2f32 is ambiguous with these decodings.
4048 if (!(imm & 0x38) && cmode == 0xF) {
4049 Inst.setOpcode(ARM::VMOVv2f32);
4050 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4053 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4055 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4056 return MCDisassembler::Fail;
4057 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4058 return MCDisassembler::Fail;
4059 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4064 static DecodeStatus DecodeVCVTQ(llvm::MCInst &Inst, unsigned Insn,
4065 uint64_t Address, const void *Decoder) {
4066 unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
4067 Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
4068 unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
4069 Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
4070 unsigned imm = fieldFromInstruction32(Insn, 16, 6);
4071 unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
4073 DecodeStatus S = MCDisassembler::Success;
4075 // VMOVv4f32 is ambiguous with these decodings.
4076 if (!(imm & 0x38) && cmode == 0xF) {
4077 Inst.setOpcode(ARM::VMOVv4f32);
4078 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4081 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4083 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4084 return MCDisassembler::Fail;
4085 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4086 return MCDisassembler::Fail;
4087 Inst.addOperand(MCOperand::CreateImm(64 - imm));