1 //===- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA -----*- C++ -*-===//
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 "ARMRegisterInfo.h"
14 #include "ARMSubtarget.h"
15 #include "MCTargetDesc/ARMAddressingModes.h"
16 #include "MCTargetDesc/ARMMCExpr.h"
17 #include "MCTargetDesc/ARMBaseInfo.h"
18 #include "llvm/MC/EDInstInfo.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/MC/MCExpr.h"
21 #include "llvm/MC/MCContext.h"
22 #include "llvm/MC/MCDisassembler.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Support/MemoryObject.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/TargetRegistry.h"
27 #include "llvm/Support/raw_ostream.h"
31 typedef MCDisassembler::DecodeStatus DecodeStatus;
34 /// ARMDisassembler - ARM disassembler for all ARM platforms.
35 class ARMDisassembler : public MCDisassembler {
37 /// Constructor - Initializes the disassembler.
39 ARMDisassembler(const MCSubtargetInfo &STI) :
46 /// getInstruction - See MCDisassembler.
47 DecodeStatus getInstruction(MCInst &instr,
49 const MemoryObject ®ion,
52 raw_ostream &cStream) const;
54 /// getEDInfo - See MCDisassembler.
55 EDInstInfo *getEDInfo() const;
59 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
60 class ThumbDisassembler : public MCDisassembler {
62 /// Constructor - Initializes the disassembler.
64 ThumbDisassembler(const MCSubtargetInfo &STI) :
68 ~ThumbDisassembler() {
71 /// getInstruction - See MCDisassembler.
72 DecodeStatus getInstruction(MCInst &instr,
74 const MemoryObject ®ion,
77 raw_ostream &cStream) const;
79 /// getEDInfo - See MCDisassembler.
80 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:
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 DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
183 uint64_t Address, const void *Decoder);
184 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
185 uint64_t Address, const void *Decoder);
186 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
188 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Val,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeNEONModImmInstruction(llvm::MCInst &Inst,unsigned Val,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Val,
201 uint64_t Address, const void *Decoder);
202 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
203 uint64_t Address, const void *Decoder);
204 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
205 uint64_t Address, const void *Decoder);
206 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
207 uint64_t Address, const void *Decoder);
208 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
209 uint64_t Address, const void *Decoder);
210 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
211 uint64_t Address, const void *Decoder);
212 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
213 uint64_t Address, const void *Decoder);
214 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Insn,
215 uint64_t Address, const void *Decoder);
216 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
217 uint64_t Address, const void *Decoder);
218 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn,
219 uint64_t Address, const void *Decoder);
220 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
221 uint64_t Address, const void *Decoder);
222 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
223 uint64_t Address, const void *Decoder);
224 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
225 uint64_t Address, const void *Decoder);
226 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
227 uint64_t Address, const void *Decoder);
228 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
229 uint64_t Address, const void *Decoder);
230 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
231 uint64_t Address, const void *Decoder);
232 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
233 uint64_t Address, const void *Decoder);
234 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
235 uint64_t Address, const void *Decoder);
236 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
237 uint64_t Address, const void *Decoder);
238 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
239 uint64_t Address, const void *Decoder);
240 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
241 uint64_t Address, const void *Decoder);
242 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
243 uint64_t Address, const void *Decoder);
244 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
245 uint64_t Address, const void *Decoder);
246 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
247 uint64_t Address, const void *Decoder);
248 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
249 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
251 uint64_t Address, const void *Decoder);
253 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
254 uint64_t Address, const void *Decoder);
255 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
256 uint64_t Address, const void *Decoder);
257 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
258 uint64_t Address, const void *Decoder);
259 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
260 uint64_t Address, const void *Decoder);
261 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
262 uint64_t Address, const void *Decoder);
263 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
264 uint64_t Address, const void *Decoder);
265 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
266 uint64_t Address, const void *Decoder);
267 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
268 uint64_t Address, const void *Decoder);
269 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
270 uint64_t Address, const void *Decoder);
271 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
272 uint64_t Address, const void *Decoder);
273 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
274 uint64_t Address, const void *Decoder);
275 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
276 uint64_t Address, const void *Decoder);
277 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
278 uint64_t Address, const void *Decoder);
279 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
280 uint64_t Address, const void *Decoder);
281 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
282 uint64_t Address, const void *Decoder);
283 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
284 uint64_t Address, const void *Decoder);
285 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
286 uint64_t Address, const void *Decoder);
287 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
288 uint64_t Address, const void *Decoder);
289 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
290 uint64_t Address, const void *Decoder);
291 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
292 uint64_t Address, const void *Decoder);
293 static DecodeStatus DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Val,
294 uint64_t Address, const void *Decoder);
295 static DecodeStatus DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
296 uint64_t Address, const void *Decoder);
297 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
298 uint64_t Address, const void *Decoder);
299 static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val,
300 uint64_t Address, const void *Decoder);
301 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
302 uint64_t Address, const void *Decoder);
303 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Val,
304 uint64_t Address, const void *Decoder);
305 static DecodeStatus DecodeT2LDRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
306 uint64_t Address, const void *Decoder);
307 static DecodeStatus DecodeT2STRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
308 uint64_t Address, const void *Decoder);
309 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, unsigned Val,
310 uint64_t Address, const void *Decoder);
311 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Val,
312 uint64_t Address, const void *Decoder);
313 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, unsigned Val,
314 uint64_t Address, const void *Decoder);
318 #include "ARMGenDisassemblerTables.inc"
319 #include "ARMGenInstrInfo.inc"
320 #include "ARMGenEDInfo.inc"
322 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
323 return new ARMDisassembler(STI);
326 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
327 return new ThumbDisassembler(STI);
330 EDInstInfo *ARMDisassembler::getEDInfo() const {
334 EDInstInfo *ThumbDisassembler::getEDInfo() const {
338 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
339 const MemoryObject &Region,
342 raw_ostream &cs) const {
347 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
348 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
350 // We want to read exactly 4 bytes of data.
351 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
353 return MCDisassembler::Fail;
356 // Encoded as a small-endian 32-bit word in the stream.
357 uint32_t insn = (bytes[3] << 24) |
362 // Calling the auto-generated decoder function.
363 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
364 if (result != MCDisassembler::Fail) {
369 // VFP and NEON instructions, similarly, are shared between ARM
372 result = decodeVFPInstruction32(MI, insn, Address, this, STI);
373 if (result != MCDisassembler::Fail) {
379 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
380 if (result != MCDisassembler::Fail) {
382 // Add a fake predicate operand, because we share these instruction
383 // definitions with Thumb2 where these instructions are predicable.
384 if (!DecodePredicateOperand(MI, 0xE, Address, this))
385 return MCDisassembler::Fail;
390 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
391 if (result != MCDisassembler::Fail) {
393 // Add a fake predicate operand, because we share these instruction
394 // definitions with Thumb2 where these instructions are predicable.
395 if (!DecodePredicateOperand(MI, 0xE, Address, this))
396 return MCDisassembler::Fail;
401 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
402 if (result != MCDisassembler::Fail) {
404 // Add a fake predicate operand, because we share these instruction
405 // definitions with Thumb2 where these instructions are predicable.
406 if (!DecodePredicateOperand(MI, 0xE, Address, this))
407 return MCDisassembler::Fail;
414 return MCDisassembler::Fail;
418 extern MCInstrDesc ARMInsts[];
421 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
422 /// immediate Value in the MCInst. The immediate Value has had any PC
423 /// adjustment made by the caller. If the instruction is a branch instruction
424 /// then isBranch is true, else false. If the getOpInfo() function was set as
425 /// part of the setupForSymbolicDisassembly() call then that function is called
426 /// to get any symbolic information at the Address for this instruction. If
427 /// that returns non-zero then the symbolic information it returns is used to
428 /// create an MCExpr and that is added as an operand to the MCInst. If
429 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
430 /// Value is done and if a symbol is found an MCExpr is created with that, else
431 /// an MCExpr with Value is created. This function returns true if it adds an
432 /// operand to the MCInst and false otherwise.
433 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
434 bool isBranch, uint64_t InstSize,
435 MCInst &MI, const void *Decoder) {
436 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
437 LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
441 struct LLVMOpInfo1 SymbolicOp;
442 SymbolicOp.Value = Value;
443 void *DisInfo = Dis->getDisInfoBlock();
444 if (!getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
446 LLVMSymbolLookupCallback SymbolLookUp =
447 Dis->getLLVMSymbolLookupCallback();
449 uint64_t ReferenceType;
450 ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
451 const char *ReferenceName;
452 const char *Name = SymbolLookUp(DisInfo, Value, &ReferenceType, Address,
455 SymbolicOp.AddSymbol.Name = Name;
456 SymbolicOp.AddSymbol.Present = true;
457 SymbolicOp.Value = 0;
460 SymbolicOp.Value = Value;
462 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
463 (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
474 MCContext *Ctx = Dis->getMCContext();
475 const MCExpr *Add = NULL;
476 if (SymbolicOp.AddSymbol.Present) {
477 if (SymbolicOp.AddSymbol.Name) {
478 StringRef Name(SymbolicOp.AddSymbol.Name);
479 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
480 Add = MCSymbolRefExpr::Create(Sym, *Ctx);
482 Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
486 const MCExpr *Sub = NULL;
487 if (SymbolicOp.SubtractSymbol.Present) {
488 if (SymbolicOp.SubtractSymbol.Name) {
489 StringRef Name(SymbolicOp.SubtractSymbol.Name);
490 MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
491 Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
493 Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
497 const MCExpr *Off = NULL;
498 if (SymbolicOp.Value != 0)
499 Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
505 LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
507 LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
509 Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
514 Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
521 Expr = MCConstantExpr::Create(0, *Ctx);
524 if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
525 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
526 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
527 MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
528 else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
529 MI.addOperand(MCOperand::CreateExpr(Expr));
531 assert(0 && "bad SymbolicOp.VariantKind");
536 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
537 /// referenced by a load instruction with the base register that is the Pc.
538 /// These can often be values in a literal pool near the Address of the
539 /// instruction. The Address of the instruction and its immediate Value are
540 /// used as a possible literal pool entry. The SymbolLookUp call back will
541 /// return the name of a symbol referenced by the the literal pool's entry if
542 /// the referenced address is that of a symbol. Or it will return a pointer to
543 /// a literal 'C' string if the referenced address of the literal pool's entry
544 /// is an address into a section with 'C' string literals.
545 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
546 const void *Decoder) {
547 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
548 LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
550 void *DisInfo = Dis->getDisInfoBlock();
551 uint64_t ReferenceType;
552 ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
553 const char *ReferenceName;
554 (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
555 if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
556 ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
557 (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
561 // Thumb1 instructions don't have explicit S bits. Rather, they
562 // implicitly set CPSR. Since it's not represented in the encoding, the
563 // auto-generated decoder won't inject the CPSR operand. We need to fix
564 // that as a post-pass.
565 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
566 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
567 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
568 MCInst::iterator I = MI.begin();
569 for (unsigned i = 0; i < NumOps; ++i, ++I) {
570 if (I == MI.end()) break;
571 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
572 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
573 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
578 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
581 // Most Thumb instructions don't have explicit predicates in the
582 // encoding, but rather get their predicates from IT context. We need
583 // to fix up the predicate operands using this context information as a
585 MCDisassembler::DecodeStatus
586 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
587 MCDisassembler::DecodeStatus S = Success;
589 // A few instructions actually have predicates encoded in them. Don't
590 // try to overwrite it if we're seeing one of those.
591 switch (MI.getOpcode()) {
602 // Some instructions (mostly conditional branches) are not
603 // allowed in IT blocks.
604 if (!ITBlock.empty())
613 // Some instructions (mostly unconditional branches) can
614 // only appears at the end of, or outside of, an IT.
615 if (ITBlock.size() > 1)
622 // If we're in an IT block, base the predicate on that. Otherwise,
623 // assume a predicate of AL.
625 if (!ITBlock.empty()) {
633 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
634 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
635 MCInst::iterator I = MI.begin();
636 for (unsigned i = 0; i < NumOps; ++i, ++I) {
637 if (I == MI.end()) break;
638 if (OpInfo[i].isPredicate()) {
639 I = MI.insert(I, MCOperand::CreateImm(CC));
642 MI.insert(I, MCOperand::CreateReg(0));
644 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
649 I = MI.insert(I, MCOperand::CreateImm(CC));
652 MI.insert(I, MCOperand::CreateReg(0));
654 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
659 // Thumb VFP instructions are a special case. Because we share their
660 // encodings between ARM and Thumb modes, and they are predicable in ARM
661 // mode, the auto-generated decoder will give them an (incorrect)
662 // predicate operand. We need to rewrite these operands based on the IT
663 // context as a post-pass.
664 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
666 if (!ITBlock.empty()) {
672 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
673 MCInst::iterator I = MI.begin();
674 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
675 for (unsigned i = 0; i < NumOps; ++i, ++I) {
676 if (OpInfo[i].isPredicate() ) {
682 I->setReg(ARM::CPSR);
688 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
689 const MemoryObject &Region,
692 raw_ostream &cs) const {
697 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
698 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
700 // We want to read exactly 2 bytes of data.
701 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
703 return MCDisassembler::Fail;
706 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
707 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
708 if (result != MCDisassembler::Fail) {
710 Check(result, AddThumbPredicate(MI));
715 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
718 bool InITBlock = !ITBlock.empty();
719 Check(result, AddThumbPredicate(MI));
720 AddThumb1SBit(MI, InITBlock);
725 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
726 if (result != MCDisassembler::Fail) {
729 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
730 // the Thumb predicate.
731 if (MI.getOpcode() == ARM::t2IT && !ITBlock.empty())
732 result = MCDisassembler::SoftFail;
734 Check(result, AddThumbPredicate(MI));
736 // If we find an IT instruction, we need to parse its condition
737 // code and mask operands so that we can apply them correctly
738 // to the subsequent instructions.
739 if (MI.getOpcode() == ARM::t2IT) {
741 // (3 - the number of trailing zeros) is the number of then / else.
742 unsigned firstcond = MI.getOperand(0).getImm();
743 unsigned Mask = MI.getOperand(1).getImm();
744 unsigned CondBit0 = Mask >> 4 & 1;
745 unsigned NumTZ = CountTrailingZeros_32(Mask);
746 assert(NumTZ <= 3 && "Invalid IT mask!");
747 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
748 bool T = ((Mask >> Pos) & 1) == CondBit0;
750 ITBlock.insert(ITBlock.begin(), firstcond);
752 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
755 ITBlock.push_back(firstcond);
761 // We want to read exactly 4 bytes of data.
762 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
764 return MCDisassembler::Fail;
767 uint32_t insn32 = (bytes[3] << 8) |
772 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
773 if (result != MCDisassembler::Fail) {
775 bool InITBlock = ITBlock.size();
776 Check(result, AddThumbPredicate(MI));
777 AddThumb1SBit(MI, InITBlock);
782 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
783 if (result != MCDisassembler::Fail) {
785 Check(result, AddThumbPredicate(MI));
790 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
791 if (result != MCDisassembler::Fail) {
793 UpdateThumbVFPPredicate(MI);
798 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
799 if (result != MCDisassembler::Fail) {
801 Check(result, AddThumbPredicate(MI));
805 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
807 uint32_t NEONLdStInsn = insn32;
808 NEONLdStInsn &= 0xF0FFFFFF;
809 NEONLdStInsn |= 0x04000000;
810 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
811 if (result != MCDisassembler::Fail) {
813 Check(result, AddThumbPredicate(MI));
818 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
820 uint32_t NEONDataInsn = insn32;
821 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
822 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
823 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
824 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
825 if (result != MCDisassembler::Fail) {
827 Check(result, AddThumbPredicate(MI));
833 return MCDisassembler::Fail;
837 extern "C" void LLVMInitializeARMDisassembler() {
838 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
839 createARMDisassembler);
840 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
841 createThumbDisassembler);
844 static const unsigned GPRDecoderTable[] = {
845 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
846 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
847 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
848 ARM::R12, ARM::SP, ARM::LR, ARM::PC
851 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
852 uint64_t Address, const void *Decoder) {
854 return MCDisassembler::Fail;
856 unsigned Register = GPRDecoderTable[RegNo];
857 Inst.addOperand(MCOperand::CreateReg(Register));
858 return MCDisassembler::Success;
862 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
863 uint64_t Address, const void *Decoder) {
864 if (RegNo == 15) return MCDisassembler::Fail;
865 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
868 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
869 uint64_t Address, const void *Decoder) {
871 return MCDisassembler::Fail;
872 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
875 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
876 uint64_t Address, const void *Decoder) {
877 unsigned Register = 0;
898 return MCDisassembler::Fail;
901 Inst.addOperand(MCOperand::CreateReg(Register));
902 return MCDisassembler::Success;
905 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
906 uint64_t Address, const void *Decoder) {
907 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
908 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
911 static const unsigned SPRDecoderTable[] = {
912 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
913 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
914 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
915 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
916 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
917 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
918 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
919 ARM::S28, ARM::S29, ARM::S30, ARM::S31
922 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
923 uint64_t Address, const void *Decoder) {
925 return MCDisassembler::Fail;
927 unsigned Register = SPRDecoderTable[RegNo];
928 Inst.addOperand(MCOperand::CreateReg(Register));
929 return MCDisassembler::Success;
932 static const unsigned DPRDecoderTable[] = {
933 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
934 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
935 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
936 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
937 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
938 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
939 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
940 ARM::D28, ARM::D29, ARM::D30, ARM::D31
943 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
944 uint64_t Address, const void *Decoder) {
946 return MCDisassembler::Fail;
948 unsigned Register = DPRDecoderTable[RegNo];
949 Inst.addOperand(MCOperand::CreateReg(Register));
950 return MCDisassembler::Success;
953 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
954 uint64_t Address, const void *Decoder) {
956 return MCDisassembler::Fail;
957 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
961 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
962 uint64_t Address, const void *Decoder) {
964 return MCDisassembler::Fail;
965 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
968 static const unsigned QPRDecoderTable[] = {
969 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
970 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
971 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
972 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
976 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
977 uint64_t Address, const void *Decoder) {
979 return MCDisassembler::Fail;
982 unsigned Register = QPRDecoderTable[RegNo];
983 Inst.addOperand(MCOperand::CreateReg(Register));
984 return MCDisassembler::Success;
987 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
988 uint64_t Address, const void *Decoder) {
989 if (Val == 0xF) return MCDisassembler::Fail;
990 // AL predicate is not allowed on Thumb1 branches.
991 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
992 return MCDisassembler::Fail;
993 Inst.addOperand(MCOperand::CreateImm(Val));
994 if (Val == ARMCC::AL) {
995 Inst.addOperand(MCOperand::CreateReg(0));
997 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
998 return MCDisassembler::Success;
1001 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
1002 uint64_t Address, const void *Decoder) {
1004 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1006 Inst.addOperand(MCOperand::CreateReg(0));
1007 return MCDisassembler::Success;
1010 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
1011 uint64_t Address, const void *Decoder) {
1012 uint32_t imm = Val & 0xFF;
1013 uint32_t rot = (Val & 0xF00) >> 7;
1014 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1015 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1016 return MCDisassembler::Success;
1019 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
1020 uint64_t Address, const void *Decoder) {
1021 DecodeStatus S = MCDisassembler::Success;
1023 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1024 unsigned type = fieldFromInstruction32(Val, 5, 2);
1025 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1027 // Register-immediate
1028 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1029 return MCDisassembler::Fail;
1031 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1034 Shift = ARM_AM::lsl;
1037 Shift = ARM_AM::lsr;
1040 Shift = ARM_AM::asr;
1043 Shift = ARM_AM::ror;
1047 if (Shift == ARM_AM::ror && imm == 0)
1048 Shift = ARM_AM::rrx;
1050 unsigned Op = Shift | (imm << 3);
1051 Inst.addOperand(MCOperand::CreateImm(Op));
1056 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
1057 uint64_t Address, const void *Decoder) {
1058 DecodeStatus S = MCDisassembler::Success;
1060 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1061 unsigned type = fieldFromInstruction32(Val, 5, 2);
1062 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
1064 // Register-register
1065 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1066 return MCDisassembler::Fail;
1067 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1068 return MCDisassembler::Fail;
1070 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1073 Shift = ARM_AM::lsl;
1076 Shift = ARM_AM::lsr;
1079 Shift = ARM_AM::asr;
1082 Shift = ARM_AM::ror;
1086 Inst.addOperand(MCOperand::CreateImm(Shift));
1091 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
1092 uint64_t Address, const void *Decoder) {
1093 DecodeStatus S = MCDisassembler::Success;
1095 bool writebackLoad = false;
1096 unsigned writebackReg = 0;
1097 switch (Inst.getOpcode()) {
1100 case ARM::LDMIA_UPD:
1101 case ARM::LDMDB_UPD:
1102 case ARM::LDMIB_UPD:
1103 case ARM::LDMDA_UPD:
1104 case ARM::t2LDMIA_UPD:
1105 case ARM::t2LDMDB_UPD:
1106 writebackLoad = true;
1107 writebackReg = Inst.getOperand(0).getReg();
1111 // Empty register lists are not allowed.
1112 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1113 for (unsigned i = 0; i < 16; ++i) {
1114 if (Val & (1 << i)) {
1115 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1116 return MCDisassembler::Fail;
1117 // Writeback not allowed if Rn is in the target list.
1118 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1119 Check(S, MCDisassembler::SoftFail);
1126 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
1127 uint64_t Address, const void *Decoder) {
1128 DecodeStatus S = MCDisassembler::Success;
1130 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1131 unsigned regs = Val & 0xFF;
1133 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1134 return MCDisassembler::Fail;
1135 for (unsigned i = 0; i < (regs - 1); ++i) {
1136 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1137 return MCDisassembler::Fail;
1143 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
1144 uint64_t Address, const void *Decoder) {
1145 DecodeStatus S = MCDisassembler::Success;
1147 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1148 unsigned regs = (Val & 0xFF) / 2;
1150 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1151 return MCDisassembler::Fail;
1152 for (unsigned i = 0; i < (regs - 1); ++i) {
1153 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1154 return MCDisassembler::Fail;
1160 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
1161 uint64_t Address, const void *Decoder) {
1162 // This operand encodes a mask of contiguous zeros between a specified MSB
1163 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1164 // the mask of all bits LSB-and-lower, and then xor them to create
1165 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1166 // create the final mask.
1167 unsigned msb = fieldFromInstruction32(Val, 5, 5);
1168 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
1170 DecodeStatus S = MCDisassembler::Success;
1171 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1173 uint32_t msb_mask = 0xFFFFFFFF;
1174 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1175 uint32_t lsb_mask = (1U << lsb) - 1;
1177 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1181 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
1182 uint64_t Address, const void *Decoder) {
1183 DecodeStatus S = MCDisassembler::Success;
1185 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1186 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
1187 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
1188 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
1189 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1190 unsigned U = fieldFromInstruction32(Insn, 23, 1);
1192 switch (Inst.getOpcode()) {
1193 case ARM::LDC_OFFSET:
1196 case ARM::LDC_OPTION:
1197 case ARM::LDCL_OFFSET:
1199 case ARM::LDCL_POST:
1200 case ARM::LDCL_OPTION:
1201 case ARM::STC_OFFSET:
1204 case ARM::STC_OPTION:
1205 case ARM::STCL_OFFSET:
1207 case ARM::STCL_POST:
1208 case ARM::STCL_OPTION:
1209 case ARM::t2LDC_OFFSET:
1210 case ARM::t2LDC_PRE:
1211 case ARM::t2LDC_POST:
1212 case ARM::t2LDC_OPTION:
1213 case ARM::t2LDCL_OFFSET:
1214 case ARM::t2LDCL_PRE:
1215 case ARM::t2LDCL_POST:
1216 case ARM::t2LDCL_OPTION:
1217 case ARM::t2STC_OFFSET:
1218 case ARM::t2STC_PRE:
1219 case ARM::t2STC_POST:
1220 case ARM::t2STC_OPTION:
1221 case ARM::t2STCL_OFFSET:
1222 case ARM::t2STCL_PRE:
1223 case ARM::t2STCL_POST:
1224 case ARM::t2STCL_OPTION:
1225 if (coproc == 0xA || coproc == 0xB)
1226 return MCDisassembler::Fail;
1232 Inst.addOperand(MCOperand::CreateImm(coproc));
1233 Inst.addOperand(MCOperand::CreateImm(CRd));
1234 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1235 return MCDisassembler::Fail;
1237 switch (Inst.getOpcode()) {
1238 case ARM::t2LDC2_OFFSET:
1239 case ARM::t2LDC2L_OFFSET:
1240 case ARM::t2LDC2_PRE:
1241 case ARM::t2LDC2L_PRE:
1242 case ARM::t2STC2_OFFSET:
1243 case ARM::t2STC2L_OFFSET:
1244 case ARM::t2STC2_PRE:
1245 case ARM::t2STC2L_PRE:
1246 case ARM::LDC2_OFFSET:
1247 case ARM::LDC2L_OFFSET:
1249 case ARM::LDC2L_PRE:
1250 case ARM::STC2_OFFSET:
1251 case ARM::STC2L_OFFSET:
1253 case ARM::STC2L_PRE:
1254 case ARM::t2LDC_OFFSET:
1255 case ARM::t2LDCL_OFFSET:
1256 case ARM::t2LDC_PRE:
1257 case ARM::t2LDCL_PRE:
1258 case ARM::t2STC_OFFSET:
1259 case ARM::t2STCL_OFFSET:
1260 case ARM::t2STC_PRE:
1261 case ARM::t2STCL_PRE:
1262 case ARM::LDC_OFFSET:
1263 case ARM::LDCL_OFFSET:
1266 case ARM::STC_OFFSET:
1267 case ARM::STCL_OFFSET:
1270 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1271 Inst.addOperand(MCOperand::CreateImm(imm));
1273 case ARM::t2LDC2_POST:
1274 case ARM::t2LDC2L_POST:
1275 case ARM::t2STC2_POST:
1276 case ARM::t2STC2L_POST:
1277 case ARM::LDC2_POST:
1278 case ARM::LDC2L_POST:
1279 case ARM::STC2_POST:
1280 case ARM::STC2L_POST:
1281 case ARM::t2LDC_POST:
1282 case ARM::t2LDCL_POST:
1283 case ARM::t2STC_POST:
1284 case ARM::t2STCL_POST:
1286 case ARM::LDCL_POST:
1288 case ARM::STCL_POST:
1292 // The 'option' variant doesn't encode 'U' in the immediate since
1293 // the immediate is unsigned [0,255].
1294 Inst.addOperand(MCOperand::CreateImm(imm));
1298 switch (Inst.getOpcode()) {
1299 case ARM::LDC_OFFSET:
1302 case ARM::LDC_OPTION:
1303 case ARM::LDCL_OFFSET:
1305 case ARM::LDCL_POST:
1306 case ARM::LDCL_OPTION:
1307 case ARM::STC_OFFSET:
1310 case ARM::STC_OPTION:
1311 case ARM::STCL_OFFSET:
1313 case ARM::STCL_POST:
1314 case ARM::STCL_OPTION:
1315 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1316 return MCDisassembler::Fail;
1326 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1327 uint64_t Address, const void *Decoder) {
1328 DecodeStatus S = MCDisassembler::Success;
1330 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1331 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1332 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1333 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1334 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1335 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1336 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1337 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1339 // On stores, the writeback operand precedes Rt.
1340 switch (Inst.getOpcode()) {
1341 case ARM::STR_POST_IMM:
1342 case ARM::STR_POST_REG:
1343 case ARM::STRB_POST_IMM:
1344 case ARM::STRB_POST_REG:
1345 case ARM::STRT_POST_REG:
1346 case ARM::STRT_POST_IMM:
1347 case ARM::STRBT_POST_REG:
1348 case ARM::STRBT_POST_IMM:
1349 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1350 return MCDisassembler::Fail;
1356 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1357 return MCDisassembler::Fail;
1359 // On loads, the writeback operand comes after Rt.
1360 switch (Inst.getOpcode()) {
1361 case ARM::LDR_POST_IMM:
1362 case ARM::LDR_POST_REG:
1363 case ARM::LDRB_POST_IMM:
1364 case ARM::LDRB_POST_REG:
1365 case ARM::LDRBT_POST_REG:
1366 case ARM::LDRBT_POST_IMM:
1367 case ARM::LDRT_POST_REG:
1368 case ARM::LDRT_POST_IMM:
1369 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1370 return MCDisassembler::Fail;
1376 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1377 return MCDisassembler::Fail;
1379 ARM_AM::AddrOpc Op = ARM_AM::add;
1380 if (!fieldFromInstruction32(Insn, 23, 1))
1383 bool writeback = (P == 0) || (W == 1);
1384 unsigned idx_mode = 0;
1386 idx_mode = ARMII::IndexModePre;
1387 else if (!P && writeback)
1388 idx_mode = ARMII::IndexModePost;
1390 if (writeback && (Rn == 15 || Rn == Rt))
1391 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1394 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1395 return MCDisassembler::Fail;
1396 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1397 switch( fieldFromInstruction32(Insn, 5, 2)) {
1411 return MCDisassembler::Fail;
1413 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1414 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1416 Inst.addOperand(MCOperand::CreateImm(imm));
1418 Inst.addOperand(MCOperand::CreateReg(0));
1419 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1420 Inst.addOperand(MCOperand::CreateImm(tmp));
1423 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1424 return MCDisassembler::Fail;
1429 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1430 uint64_t Address, const void *Decoder) {
1431 DecodeStatus S = MCDisassembler::Success;
1433 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1434 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1435 unsigned type = fieldFromInstruction32(Val, 5, 2);
1436 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1437 unsigned U = fieldFromInstruction32(Val, 12, 1);
1439 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1455 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1456 return MCDisassembler::Fail;
1457 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1458 return MCDisassembler::Fail;
1461 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1463 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1464 Inst.addOperand(MCOperand::CreateImm(shift));
1470 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1471 uint64_t Address, const void *Decoder) {
1472 DecodeStatus S = MCDisassembler::Success;
1474 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1475 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1476 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1477 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1478 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1479 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1480 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1481 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1482 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1484 bool writeback = (W == 1) | (P == 0);
1486 // For {LD,ST}RD, Rt must be even, else undefined.
1487 switch (Inst.getOpcode()) {
1490 case ARM::STRD_POST:
1493 case ARM::LDRD_POST:
1494 if (Rt & 0x1) return MCDisassembler::Fail;
1500 if (writeback) { // Writeback
1502 U |= ARMII::IndexModePre << 9;
1504 U |= ARMII::IndexModePost << 9;
1506 // On stores, the writeback operand precedes Rt.
1507 switch (Inst.getOpcode()) {
1510 case ARM::STRD_POST:
1513 case ARM::STRH_POST:
1514 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1515 return MCDisassembler::Fail;
1522 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1523 return MCDisassembler::Fail;
1524 switch (Inst.getOpcode()) {
1527 case ARM::STRD_POST:
1530 case ARM::LDRD_POST:
1531 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1532 return MCDisassembler::Fail;
1539 // On loads, the writeback operand comes after Rt.
1540 switch (Inst.getOpcode()) {
1543 case ARM::LDRD_POST:
1546 case ARM::LDRH_POST:
1548 case ARM::LDRSH_PRE:
1549 case ARM::LDRSH_POST:
1551 case ARM::LDRSB_PRE:
1552 case ARM::LDRSB_POST:
1555 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1556 return MCDisassembler::Fail;
1563 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1564 return MCDisassembler::Fail;
1567 Inst.addOperand(MCOperand::CreateReg(0));
1568 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1570 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1571 return MCDisassembler::Fail;
1572 Inst.addOperand(MCOperand::CreateImm(U));
1575 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1576 return MCDisassembler::Fail;
1581 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1582 uint64_t Address, const void *Decoder) {
1583 DecodeStatus S = MCDisassembler::Success;
1585 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1586 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1603 Inst.addOperand(MCOperand::CreateImm(mode));
1604 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1605 return MCDisassembler::Fail;
1610 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1612 uint64_t Address, const void *Decoder) {
1613 DecodeStatus S = MCDisassembler::Success;
1615 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1616 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1617 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1620 switch (Inst.getOpcode()) {
1622 Inst.setOpcode(ARM::RFEDA);
1624 case ARM::LDMDA_UPD:
1625 Inst.setOpcode(ARM::RFEDA_UPD);
1628 Inst.setOpcode(ARM::RFEDB);
1630 case ARM::LDMDB_UPD:
1631 Inst.setOpcode(ARM::RFEDB_UPD);
1634 Inst.setOpcode(ARM::RFEIA);
1636 case ARM::LDMIA_UPD:
1637 Inst.setOpcode(ARM::RFEIA_UPD);
1640 Inst.setOpcode(ARM::RFEIB);
1642 case ARM::LDMIB_UPD:
1643 Inst.setOpcode(ARM::RFEIB_UPD);
1646 Inst.setOpcode(ARM::SRSDA);
1648 case ARM::STMDA_UPD:
1649 Inst.setOpcode(ARM::SRSDA_UPD);
1652 Inst.setOpcode(ARM::SRSDB);
1654 case ARM::STMDB_UPD:
1655 Inst.setOpcode(ARM::SRSDB_UPD);
1658 Inst.setOpcode(ARM::SRSIA);
1660 case ARM::STMIA_UPD:
1661 Inst.setOpcode(ARM::SRSIA_UPD);
1664 Inst.setOpcode(ARM::SRSIB);
1666 case ARM::STMIB_UPD:
1667 Inst.setOpcode(ARM::SRSIB_UPD);
1670 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1673 // For stores (which become SRS's, the only operand is the mode.
1674 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1676 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1680 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1683 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1684 return MCDisassembler::Fail;
1685 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1686 return MCDisassembler::Fail; // Tied
1687 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1688 return MCDisassembler::Fail;
1689 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1690 return MCDisassembler::Fail;
1695 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1696 uint64_t Address, const void *Decoder) {
1697 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1698 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1699 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1700 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1702 DecodeStatus S = MCDisassembler::Success;
1704 // imod == '01' --> UNPREDICTABLE
1705 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1706 // return failure here. The '01' imod value is unprintable, so there's
1707 // nothing useful we could do even if we returned UNPREDICTABLE.
1709 if (imod == 1) return MCDisassembler::Fail;
1712 Inst.setOpcode(ARM::CPS3p);
1713 Inst.addOperand(MCOperand::CreateImm(imod));
1714 Inst.addOperand(MCOperand::CreateImm(iflags));
1715 Inst.addOperand(MCOperand::CreateImm(mode));
1716 } else if (imod && !M) {
1717 Inst.setOpcode(ARM::CPS2p);
1718 Inst.addOperand(MCOperand::CreateImm(imod));
1719 Inst.addOperand(MCOperand::CreateImm(iflags));
1720 if (mode) S = MCDisassembler::SoftFail;
1721 } else if (!imod && M) {
1722 Inst.setOpcode(ARM::CPS1p);
1723 Inst.addOperand(MCOperand::CreateImm(mode));
1724 if (iflags) S = MCDisassembler::SoftFail;
1726 // imod == '00' && M == '0' --> UNPREDICTABLE
1727 Inst.setOpcode(ARM::CPS1p);
1728 Inst.addOperand(MCOperand::CreateImm(mode));
1729 S = MCDisassembler::SoftFail;
1735 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1736 uint64_t Address, const void *Decoder) {
1737 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1738 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1739 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1740 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1742 DecodeStatus S = MCDisassembler::Success;
1744 // imod == '01' --> UNPREDICTABLE
1745 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1746 // return failure here. The '01' imod value is unprintable, so there's
1747 // nothing useful we could do even if we returned UNPREDICTABLE.
1749 if (imod == 1) return MCDisassembler::Fail;
1752 Inst.setOpcode(ARM::t2CPS3p);
1753 Inst.addOperand(MCOperand::CreateImm(imod));
1754 Inst.addOperand(MCOperand::CreateImm(iflags));
1755 Inst.addOperand(MCOperand::CreateImm(mode));
1756 } else if (imod && !M) {
1757 Inst.setOpcode(ARM::t2CPS2p);
1758 Inst.addOperand(MCOperand::CreateImm(imod));
1759 Inst.addOperand(MCOperand::CreateImm(iflags));
1760 if (mode) S = MCDisassembler::SoftFail;
1761 } else if (!imod && M) {
1762 Inst.setOpcode(ARM::t2CPS1p);
1763 Inst.addOperand(MCOperand::CreateImm(mode));
1764 if (iflags) S = MCDisassembler::SoftFail;
1766 // imod == '00' && M == '0' --> UNPREDICTABLE
1767 Inst.setOpcode(ARM::t2CPS1p);
1768 Inst.addOperand(MCOperand::CreateImm(mode));
1769 S = MCDisassembler::SoftFail;
1775 static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1776 uint64_t Address, const void *Decoder) {
1777 DecodeStatus S = MCDisassembler::Success;
1779 unsigned Rd = fieldFromInstruction32(Insn, 8, 4);
1782 imm |= (fieldFromInstruction32(Insn, 0, 8) << 0);
1783 imm |= (fieldFromInstruction32(Insn, 12, 3) << 8);
1784 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1785 imm |= (fieldFromInstruction32(Insn, 26, 1) << 11);
1787 if (Inst.getOpcode() == ARM::t2MOVTi16)
1788 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1789 return MCDisassembler::Fail;
1790 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1791 return MCDisassembler::Fail;
1793 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1794 Inst.addOperand(MCOperand::CreateImm(imm));
1799 static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1800 uint64_t Address, const void *Decoder) {
1801 DecodeStatus S = MCDisassembler::Success;
1803 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1804 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1807 imm |= (fieldFromInstruction32(Insn, 0, 12) << 0);
1808 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1810 if (Inst.getOpcode() == ARM::MOVTi16)
1811 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1812 return MCDisassembler::Fail;
1813 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1814 return MCDisassembler::Fail;
1816 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1817 Inst.addOperand(MCOperand::CreateImm(imm));
1819 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1820 return MCDisassembler::Fail;
1825 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1826 uint64_t Address, const void *Decoder) {
1827 DecodeStatus S = MCDisassembler::Success;
1829 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1830 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1831 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1832 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1833 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1836 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1838 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1839 return MCDisassembler::Fail;
1840 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1841 return MCDisassembler::Fail;
1842 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1843 return MCDisassembler::Fail;
1844 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1845 return MCDisassembler::Fail;
1847 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1848 return MCDisassembler::Fail;
1853 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1854 uint64_t Address, const void *Decoder) {
1855 DecodeStatus S = MCDisassembler::Success;
1857 unsigned add = fieldFromInstruction32(Val, 12, 1);
1858 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1859 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1861 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1862 return MCDisassembler::Fail;
1864 if (!add) imm *= -1;
1865 if (imm == 0 && !add) imm = INT32_MIN;
1866 Inst.addOperand(MCOperand::CreateImm(imm));
1868 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
1873 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1874 uint64_t Address, const void *Decoder) {
1875 DecodeStatus S = MCDisassembler::Success;
1877 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1878 unsigned U = fieldFromInstruction32(Val, 8, 1);
1879 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1881 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1882 return MCDisassembler::Fail;
1885 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1887 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1892 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1893 uint64_t Address, const void *Decoder) {
1894 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1898 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1899 uint64_t Address, const void *Decoder) {
1900 DecodeStatus S = MCDisassembler::Success;
1902 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1903 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1906 Inst.setOpcode(ARM::BLXi);
1907 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1908 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1912 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8, true,
1914 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1915 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1916 return MCDisassembler::Fail;
1922 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1923 uint64_t Address, const void *Decoder) {
1924 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1925 return MCDisassembler::Success;
1928 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1929 uint64_t Address, const void *Decoder) {
1930 DecodeStatus S = MCDisassembler::Success;
1932 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1933 unsigned align = fieldFromInstruction32(Val, 4, 2);
1935 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1936 return MCDisassembler::Fail;
1938 Inst.addOperand(MCOperand::CreateImm(0));
1940 Inst.addOperand(MCOperand::CreateImm(4 << align));
1945 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1946 uint64_t Address, const void *Decoder) {
1947 DecodeStatus S = MCDisassembler::Success;
1949 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1950 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1951 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1952 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1953 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1954 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1956 // First output register
1957 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1958 return MCDisassembler::Fail;
1960 // Second output register
1961 switch (Inst.getOpcode()) {
1965 case ARM::VLD2q8_UPD:
1966 case ARM::VLD2q16_UPD:
1967 case ARM::VLD2q32_UPD:
1971 case ARM::VLD3d8_UPD:
1972 case ARM::VLD3d16_UPD:
1973 case ARM::VLD3d32_UPD:
1977 case ARM::VLD4d8_UPD:
1978 case ARM::VLD4d16_UPD:
1979 case ARM::VLD4d32_UPD:
1980 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
1981 return MCDisassembler::Fail;
1986 case ARM::VLD2b8_UPD:
1987 case ARM::VLD2b16_UPD:
1988 case ARM::VLD2b32_UPD:
1992 case ARM::VLD3q8_UPD:
1993 case ARM::VLD3q16_UPD:
1994 case ARM::VLD3q32_UPD:
1998 case ARM::VLD4q8_UPD:
1999 case ARM::VLD4q16_UPD:
2000 case ARM::VLD4q32_UPD:
2001 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2002 return MCDisassembler::Fail;
2007 // Third output register
2008 switch(Inst.getOpcode()) {
2012 case ARM::VLD2q8_UPD:
2013 case ARM::VLD2q16_UPD:
2014 case ARM::VLD2q32_UPD:
2018 case ARM::VLD3d8_UPD:
2019 case ARM::VLD3d16_UPD:
2020 case ARM::VLD3d32_UPD:
2024 case ARM::VLD4d8_UPD:
2025 case ARM::VLD4d16_UPD:
2026 case ARM::VLD4d32_UPD:
2027 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2028 return MCDisassembler::Fail;
2033 case ARM::VLD3q8_UPD:
2034 case ARM::VLD3q16_UPD:
2035 case ARM::VLD3q32_UPD:
2039 case ARM::VLD4q8_UPD:
2040 case ARM::VLD4q16_UPD:
2041 case ARM::VLD4q32_UPD:
2042 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2043 return MCDisassembler::Fail;
2049 // Fourth output register
2050 switch (Inst.getOpcode()) {
2054 case ARM::VLD2q8_UPD:
2055 case ARM::VLD2q16_UPD:
2056 case ARM::VLD2q32_UPD:
2060 case ARM::VLD4d8_UPD:
2061 case ARM::VLD4d16_UPD:
2062 case ARM::VLD4d32_UPD:
2063 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2064 return MCDisassembler::Fail;
2069 case ARM::VLD4q8_UPD:
2070 case ARM::VLD4q16_UPD:
2071 case ARM::VLD4q32_UPD:
2072 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2073 return MCDisassembler::Fail;
2079 // Writeback operand
2080 switch (Inst.getOpcode()) {
2081 case ARM::VLD1d8_UPD:
2082 case ARM::VLD1d16_UPD:
2083 case ARM::VLD1d32_UPD:
2084 case ARM::VLD1d64_UPD:
2085 case ARM::VLD1q8_UPD:
2086 case ARM::VLD1q16_UPD:
2087 case ARM::VLD1q32_UPD:
2088 case ARM::VLD1q64_UPD:
2089 case ARM::VLD1d8T_UPD:
2090 case ARM::VLD1d16T_UPD:
2091 case ARM::VLD1d32T_UPD:
2092 case ARM::VLD1d64T_UPD:
2093 case ARM::VLD1d8Q_UPD:
2094 case ARM::VLD1d16Q_UPD:
2095 case ARM::VLD1d32Q_UPD:
2096 case ARM::VLD1d64Q_UPD:
2097 case ARM::VLD2d8_UPD:
2098 case ARM::VLD2d16_UPD:
2099 case ARM::VLD2d32_UPD:
2100 case ARM::VLD2q8_UPD:
2101 case ARM::VLD2q16_UPD:
2102 case ARM::VLD2q32_UPD:
2103 case ARM::VLD2b8_UPD:
2104 case ARM::VLD2b16_UPD:
2105 case ARM::VLD2b32_UPD:
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)
2131 Inst.addOperand(MCOperand::CreateReg(0));
2132 else if (Rm != 0xF) {
2133 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2134 return MCDisassembler::Fail;
2140 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
2141 uint64_t Address, const void *Decoder) {
2142 DecodeStatus S = MCDisassembler::Success;
2144 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2145 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2146 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
2147 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2148 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2149 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2151 // Writeback Operand
2152 switch (Inst.getOpcode()) {
2153 case ARM::VST1d8_UPD:
2154 case ARM::VST1d16_UPD:
2155 case ARM::VST1d32_UPD:
2156 case ARM::VST1d64_UPD:
2157 case ARM::VST1q8_UPD:
2158 case ARM::VST1q16_UPD:
2159 case ARM::VST1q32_UPD:
2160 case ARM::VST1q64_UPD:
2161 case ARM::VST1d8T_UPD:
2162 case ARM::VST1d16T_UPD:
2163 case ARM::VST1d32T_UPD:
2164 case ARM::VST1d64T_UPD:
2165 case ARM::VST1d8Q_UPD:
2166 case ARM::VST1d16Q_UPD:
2167 case ARM::VST1d32Q_UPD:
2168 case ARM::VST1d64Q_UPD:
2169 case ARM::VST2d8_UPD:
2170 case ARM::VST2d16_UPD:
2171 case ARM::VST2d32_UPD:
2172 case ARM::VST2q8_UPD:
2173 case ARM::VST2q16_UPD:
2174 case ARM::VST2q32_UPD:
2175 case ARM::VST2b8_UPD:
2176 case ARM::VST2b16_UPD:
2177 case ARM::VST2b32_UPD:
2178 case ARM::VST3d8_UPD:
2179 case ARM::VST3d16_UPD:
2180 case ARM::VST3d32_UPD:
2181 case ARM::VST3q8_UPD:
2182 case ARM::VST3q16_UPD:
2183 case ARM::VST3q32_UPD:
2184 case ARM::VST4d8_UPD:
2185 case ARM::VST4d16_UPD:
2186 case ARM::VST4d32_UPD:
2187 case ARM::VST4q8_UPD:
2188 case ARM::VST4q16_UPD:
2189 case ARM::VST4q32_UPD:
2190 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2191 return MCDisassembler::Fail;
2197 // AddrMode6 Base (register+alignment)
2198 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2199 return MCDisassembler::Fail;
2201 // AddrMode6 Offset (register)
2203 Inst.addOperand(MCOperand::CreateReg(0));
2204 else if (Rm != 0xF) {
2205 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2206 return MCDisassembler::Fail;
2209 // First input register
2210 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2211 return MCDisassembler::Fail;
2213 // Second input register
2214 switch (Inst.getOpcode()) {
2219 case ARM::VST1q8_UPD:
2220 case ARM::VST1q16_UPD:
2221 case ARM::VST1q32_UPD:
2222 case ARM::VST1q64_UPD:
2227 case ARM::VST1d8T_UPD:
2228 case ARM::VST1d16T_UPD:
2229 case ARM::VST1d32T_UPD:
2230 case ARM::VST1d64T_UPD:
2235 case ARM::VST1d8Q_UPD:
2236 case ARM::VST1d16Q_UPD:
2237 case ARM::VST1d32Q_UPD:
2238 case ARM::VST1d64Q_UPD:
2242 case ARM::VST2d8_UPD:
2243 case ARM::VST2d16_UPD:
2244 case ARM::VST2d32_UPD:
2248 case ARM::VST2q8_UPD:
2249 case ARM::VST2q16_UPD:
2250 case ARM::VST2q32_UPD:
2254 case ARM::VST3d8_UPD:
2255 case ARM::VST3d16_UPD:
2256 case ARM::VST3d32_UPD:
2260 case ARM::VST4d8_UPD:
2261 case ARM::VST4d16_UPD:
2262 case ARM::VST4d32_UPD:
2263 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2264 return MCDisassembler::Fail;
2269 case ARM::VST2b8_UPD:
2270 case ARM::VST2b16_UPD:
2271 case ARM::VST2b32_UPD:
2275 case ARM::VST3q8_UPD:
2276 case ARM::VST3q16_UPD:
2277 case ARM::VST3q32_UPD:
2281 case ARM::VST4q8_UPD:
2282 case ARM::VST4q16_UPD:
2283 case ARM::VST4q32_UPD:
2284 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2285 return MCDisassembler::Fail;
2291 // Third input register
2292 switch (Inst.getOpcode()) {
2297 case ARM::VST1d8T_UPD:
2298 case ARM::VST1d16T_UPD:
2299 case ARM::VST1d32T_UPD:
2300 case ARM::VST1d64T_UPD:
2305 case ARM::VST1d8Q_UPD:
2306 case ARM::VST1d16Q_UPD:
2307 case ARM::VST1d32Q_UPD:
2308 case ARM::VST1d64Q_UPD:
2312 case ARM::VST2q8_UPD:
2313 case ARM::VST2q16_UPD:
2314 case ARM::VST2q32_UPD:
2318 case ARM::VST3d8_UPD:
2319 case ARM::VST3d16_UPD:
2320 case ARM::VST3d32_UPD:
2324 case ARM::VST4d8_UPD:
2325 case ARM::VST4d16_UPD:
2326 case ARM::VST4d32_UPD:
2327 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2328 return MCDisassembler::Fail;
2333 case ARM::VST3q8_UPD:
2334 case ARM::VST3q16_UPD:
2335 case ARM::VST3q32_UPD:
2339 case ARM::VST4q8_UPD:
2340 case ARM::VST4q16_UPD:
2341 case ARM::VST4q32_UPD:
2342 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2343 return MCDisassembler::Fail;
2349 // Fourth input register
2350 switch (Inst.getOpcode()) {
2355 case ARM::VST1d8Q_UPD:
2356 case ARM::VST1d16Q_UPD:
2357 case ARM::VST1d32Q_UPD:
2358 case ARM::VST1d64Q_UPD:
2362 case ARM::VST2q8_UPD:
2363 case ARM::VST2q16_UPD:
2364 case ARM::VST2q32_UPD:
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);
2400 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
2402 align *= (1 << size);
2404 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2405 return MCDisassembler::Fail;
2407 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2408 return MCDisassembler::Fail;
2411 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2412 return MCDisassembler::Fail;
2415 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2416 return MCDisassembler::Fail;
2417 Inst.addOperand(MCOperand::CreateImm(align));
2420 Inst.addOperand(MCOperand::CreateReg(0));
2421 else if (Rm != 0xF) {
2422 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2423 return MCDisassembler::Fail;
2429 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2430 uint64_t Address, const void *Decoder) {
2431 DecodeStatus S = MCDisassembler::Success;
2433 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2434 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2435 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2436 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2437 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2438 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2439 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2442 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2443 return MCDisassembler::Fail;
2444 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2445 return MCDisassembler::Fail;
2447 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2448 return MCDisassembler::Fail;
2451 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2452 return MCDisassembler::Fail;
2453 Inst.addOperand(MCOperand::CreateImm(align));
2456 Inst.addOperand(MCOperand::CreateReg(0));
2457 else if (Rm != 0xF) {
2458 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2459 return MCDisassembler::Fail;
2465 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2466 uint64_t Address, const void *Decoder) {
2467 DecodeStatus S = MCDisassembler::Success;
2469 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2470 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2471 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2472 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2473 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2475 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2476 return MCDisassembler::Fail;
2477 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2478 return MCDisassembler::Fail;
2479 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2480 return MCDisassembler::Fail;
2482 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2483 return MCDisassembler::Fail;
2486 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2487 return MCDisassembler::Fail;
2488 Inst.addOperand(MCOperand::CreateImm(0));
2491 Inst.addOperand(MCOperand::CreateReg(0));
2492 else if (Rm != 0xF) {
2493 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2494 return MCDisassembler::Fail;
2500 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2501 uint64_t Address, const void *Decoder) {
2502 DecodeStatus S = MCDisassembler::Success;
2504 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2505 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2506 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2507 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2508 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2509 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2510 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2525 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2526 return MCDisassembler::Fail;
2527 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2528 return MCDisassembler::Fail;
2529 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2530 return MCDisassembler::Fail;
2531 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2532 return MCDisassembler::Fail;
2534 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2535 return MCDisassembler::Fail;
2538 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2539 return MCDisassembler::Fail;
2540 Inst.addOperand(MCOperand::CreateImm(align));
2543 Inst.addOperand(MCOperand::CreateReg(0));
2544 else if (Rm != 0xF) {
2545 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2546 return MCDisassembler::Fail;
2553 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2554 uint64_t Address, const void *Decoder) {
2555 DecodeStatus S = MCDisassembler::Success;
2557 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2558 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2559 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2560 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2561 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2562 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2563 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2564 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2567 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2568 return MCDisassembler::Fail;
2570 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2571 return MCDisassembler::Fail;
2574 Inst.addOperand(MCOperand::CreateImm(imm));
2576 switch (Inst.getOpcode()) {
2577 case ARM::VORRiv4i16:
2578 case ARM::VORRiv2i32:
2579 case ARM::VBICiv4i16:
2580 case ARM::VBICiv2i32:
2581 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2582 return MCDisassembler::Fail;
2584 case ARM::VORRiv8i16:
2585 case ARM::VORRiv4i32:
2586 case ARM::VBICiv8i16:
2587 case ARM::VBICiv4i32:
2588 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2589 return MCDisassembler::Fail;
2598 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2599 uint64_t Address, const void *Decoder) {
2600 DecodeStatus S = MCDisassembler::Success;
2602 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2603 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2604 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2605 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2606 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2608 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2609 return MCDisassembler::Fail;
2610 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2611 return MCDisassembler::Fail;
2612 Inst.addOperand(MCOperand::CreateImm(8 << size));
2617 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2618 uint64_t Address, const void *Decoder) {
2619 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2620 return MCDisassembler::Success;
2623 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2624 uint64_t Address, const void *Decoder) {
2625 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2626 return MCDisassembler::Success;
2629 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2630 uint64_t Address, const void *Decoder) {
2631 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2632 return MCDisassembler::Success;
2635 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2636 uint64_t Address, const void *Decoder) {
2637 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2638 return MCDisassembler::Success;
2641 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2642 uint64_t Address, const void *Decoder) {
2643 DecodeStatus S = MCDisassembler::Success;
2645 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2646 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2647 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2648 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2649 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2650 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2651 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2652 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2654 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2655 return MCDisassembler::Fail;
2657 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2658 return MCDisassembler::Fail; // Writeback
2661 for (unsigned i = 0; i < length; ++i) {
2662 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)))
2663 return MCDisassembler::Fail;
2666 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2667 return MCDisassembler::Fail;
2672 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2673 uint64_t Address, const void *Decoder) {
2674 DecodeStatus S = MCDisassembler::Success;
2676 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2677 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2679 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2680 return MCDisassembler::Fail;
2682 switch(Inst.getOpcode()) {
2684 return MCDisassembler::Fail;
2686 break; // tADR does not explicitly represent the PC as an operand.
2688 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2692 Inst.addOperand(MCOperand::CreateImm(imm));
2696 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2697 uint64_t Address, const void *Decoder) {
2698 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2699 return MCDisassembler::Success;
2702 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2703 uint64_t Address, const void *Decoder) {
2704 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2705 return MCDisassembler::Success;
2708 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2709 uint64_t Address, const void *Decoder) {
2710 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2711 return MCDisassembler::Success;
2714 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2715 uint64_t Address, const void *Decoder) {
2716 DecodeStatus S = MCDisassembler::Success;
2718 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2719 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2721 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2722 return MCDisassembler::Fail;
2723 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2724 return MCDisassembler::Fail;
2729 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2730 uint64_t Address, const void *Decoder) {
2731 DecodeStatus S = MCDisassembler::Success;
2733 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2734 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2736 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2737 return MCDisassembler::Fail;
2738 Inst.addOperand(MCOperand::CreateImm(imm));
2743 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2744 uint64_t Address, const void *Decoder) {
2745 unsigned imm = Val << 2;
2747 Inst.addOperand(MCOperand::CreateImm(imm));
2748 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
2750 return MCDisassembler::Success;
2753 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2754 uint64_t Address, const void *Decoder) {
2755 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2756 Inst.addOperand(MCOperand::CreateImm(Val));
2758 return MCDisassembler::Success;
2761 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2762 uint64_t Address, const void *Decoder) {
2763 DecodeStatus S = MCDisassembler::Success;
2765 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2766 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2767 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2769 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2770 return MCDisassembler::Fail;
2771 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2772 return MCDisassembler::Fail;
2773 Inst.addOperand(MCOperand::CreateImm(imm));
2778 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2779 uint64_t Address, const void *Decoder) {
2780 DecodeStatus S = MCDisassembler::Success;
2782 switch (Inst.getOpcode()) {
2788 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2789 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2790 return MCDisassembler::Fail;
2794 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2796 switch (Inst.getOpcode()) {
2798 Inst.setOpcode(ARM::t2LDRBpci);
2801 Inst.setOpcode(ARM::t2LDRHpci);
2804 Inst.setOpcode(ARM::t2LDRSHpci);
2807 Inst.setOpcode(ARM::t2LDRSBpci);
2810 Inst.setOpcode(ARM::t2PLDi12);
2811 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2814 return MCDisassembler::Fail;
2817 int imm = fieldFromInstruction32(Insn, 0, 12);
2818 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2819 Inst.addOperand(MCOperand::CreateImm(imm));
2824 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2825 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2826 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2827 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2828 return MCDisassembler::Fail;
2833 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2834 uint64_t Address, const void *Decoder) {
2835 int imm = Val & 0xFF;
2836 if (!(Val & 0x100)) imm *= -1;
2837 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2839 return MCDisassembler::Success;
2842 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2843 uint64_t Address, const void *Decoder) {
2844 DecodeStatus S = MCDisassembler::Success;
2846 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2847 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2849 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2850 return MCDisassembler::Fail;
2851 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2852 return MCDisassembler::Fail;
2857 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
2858 uint64_t Address, const void *Decoder) {
2859 DecodeStatus S = MCDisassembler::Success;
2861 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
2862 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2864 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2865 return MCDisassembler::Fail;
2867 Inst.addOperand(MCOperand::CreateImm(imm));
2872 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2873 uint64_t Address, const void *Decoder) {
2874 int imm = Val & 0xFF;
2877 else if (!(Val & 0x100))
2879 Inst.addOperand(MCOperand::CreateImm(imm));
2881 return MCDisassembler::Success;
2885 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2886 uint64_t Address, const void *Decoder) {
2887 DecodeStatus S = MCDisassembler::Success;
2889 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2890 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2892 // Some instructions always use an additive offset.
2893 switch (Inst.getOpcode()) {
2908 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2909 return MCDisassembler::Fail;
2910 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2911 return MCDisassembler::Fail;
2916 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn,
2917 uint64_t Address, const void *Decoder) {
2918 DecodeStatus S = MCDisassembler::Success;
2920 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2921 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2922 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
2923 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
2925 unsigned load = fieldFromInstruction32(Insn, 20, 1);
2928 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2929 return MCDisassembler::Fail;
2932 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2933 return MCDisassembler::Fail;
2936 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2937 return MCDisassembler::Fail;
2940 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
2941 return MCDisassembler::Fail;
2946 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2947 uint64_t Address, const void *Decoder) {
2948 DecodeStatus S = MCDisassembler::Success;
2950 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2951 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2953 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2954 return MCDisassembler::Fail;
2955 Inst.addOperand(MCOperand::CreateImm(imm));
2961 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2962 uint64_t Address, const void *Decoder) {
2963 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2965 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2966 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2967 Inst.addOperand(MCOperand::CreateImm(imm));
2969 return MCDisassembler::Success;
2972 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2973 uint64_t Address, const void *Decoder) {
2974 DecodeStatus S = MCDisassembler::Success;
2976 if (Inst.getOpcode() == ARM::tADDrSP) {
2977 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2978 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2980 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2981 return MCDisassembler::Fail;
2982 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2983 return MCDisassembler::Fail;
2984 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2985 } else if (Inst.getOpcode() == ARM::tADDspr) {
2986 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2988 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2989 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2990 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2991 return MCDisassembler::Fail;
2997 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2998 uint64_t Address, const void *Decoder) {
2999 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
3000 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
3002 Inst.addOperand(MCOperand::CreateImm(imod));
3003 Inst.addOperand(MCOperand::CreateImm(flags));
3005 return MCDisassembler::Success;
3008 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
3009 uint64_t Address, const void *Decoder) {
3010 DecodeStatus S = MCDisassembler::Success;
3011 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3012 unsigned add = fieldFromInstruction32(Insn, 4, 1);
3014 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3015 return MCDisassembler::Fail;
3016 Inst.addOperand(MCOperand::CreateImm(add));
3021 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
3022 uint64_t Address, const void *Decoder) {
3023 if (!tryAddingSymbolicOperand(Address,
3024 (Address & ~2u) + SignExtend32<22>(Val << 1) + 4,
3025 true, 4, Inst, Decoder))
3026 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3027 return MCDisassembler::Success;
3030 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
3031 uint64_t Address, const void *Decoder) {
3032 if (Val == 0xA || Val == 0xB)
3033 return MCDisassembler::Fail;
3035 Inst.addOperand(MCOperand::CreateImm(Val));
3036 return MCDisassembler::Success;
3040 DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Insn,
3041 uint64_t Address, const void *Decoder) {
3042 DecodeStatus S = MCDisassembler::Success;
3044 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3045 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3047 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3048 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3049 return MCDisassembler::Fail;
3050 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3051 return MCDisassembler::Fail;
3056 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
3057 uint64_t Address, const void *Decoder) {
3058 DecodeStatus S = MCDisassembler::Success;
3060 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
3061 if (pred == 0xE || pred == 0xF) {
3062 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
3065 return MCDisassembler::Fail;
3067 Inst.setOpcode(ARM::t2DSB);
3070 Inst.setOpcode(ARM::t2DMB);
3073 Inst.setOpcode(ARM::t2ISB);
3077 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
3078 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3081 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
3082 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
3083 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
3084 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
3085 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
3087 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3088 return MCDisassembler::Fail;
3089 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3090 return MCDisassembler::Fail;
3095 // Decode a shifted immediate operand. These basically consist
3096 // of an 8-bit value, and a 4-bit directive that specifies either
3097 // a splat operation or a rotation.
3098 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
3099 uint64_t Address, const void *Decoder) {
3100 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
3102 unsigned byte = fieldFromInstruction32(Val, 8, 2);
3103 unsigned imm = fieldFromInstruction32(Val, 0, 8);
3106 Inst.addOperand(MCOperand::CreateImm(imm));
3109 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3112 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3115 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3120 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
3121 unsigned rot = fieldFromInstruction32(Val, 7, 5);
3122 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3123 Inst.addOperand(MCOperand::CreateImm(imm));
3126 return MCDisassembler::Success;
3130 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
3131 uint64_t Address, const void *Decoder){
3132 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3133 return MCDisassembler::Success;
3136 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
3137 uint64_t Address, const void *Decoder){
3138 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3139 return MCDisassembler::Success;
3142 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
3143 uint64_t Address, const void *Decoder) {
3146 return MCDisassembler::Fail;
3158 Inst.addOperand(MCOperand::CreateImm(Val));
3159 return MCDisassembler::Success;
3162 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
3163 uint64_t Address, const void *Decoder) {
3164 if (!Val) return MCDisassembler::Fail;
3165 Inst.addOperand(MCOperand::CreateImm(Val));
3166 return MCDisassembler::Success;
3169 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
3170 uint64_t Address, const void *Decoder) {
3171 DecodeStatus S = MCDisassembler::Success;
3173 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3174 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3175 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3177 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3179 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3180 return MCDisassembler::Fail;
3181 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3182 return MCDisassembler::Fail;
3183 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3184 return MCDisassembler::Fail;
3185 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3186 return MCDisassembler::Fail;
3192 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
3193 uint64_t Address, const void *Decoder){
3194 DecodeStatus S = MCDisassembler::Success;
3196 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3197 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3198 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3199 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3201 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3202 return MCDisassembler::Fail;
3204 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3205 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3207 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3208 return MCDisassembler::Fail;
3209 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3210 return MCDisassembler::Fail;
3211 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3212 return MCDisassembler::Fail;
3213 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3214 return MCDisassembler::Fail;
3219 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
3220 uint64_t Address, const void *Decoder) {
3221 DecodeStatus S = MCDisassembler::Success;
3223 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3224 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3225 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3226 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3227 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3228 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3230 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3232 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3233 return MCDisassembler::Fail;
3234 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3235 return MCDisassembler::Fail;
3236 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3237 return MCDisassembler::Fail;
3238 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3239 return MCDisassembler::Fail;
3244 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
3245 uint64_t Address, const void *Decoder) {
3246 DecodeStatus S = MCDisassembler::Success;
3248 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3249 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3250 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3251 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3252 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3253 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3254 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3256 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3257 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3259 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3260 return MCDisassembler::Fail;
3261 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3262 return MCDisassembler::Fail;
3263 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3264 return MCDisassembler::Fail;
3265 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3266 return MCDisassembler::Fail;
3272 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3273 uint64_t Address, const void *Decoder) {
3274 DecodeStatus S = MCDisassembler::Success;
3276 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3277 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3278 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3279 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3280 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3281 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3283 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3285 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3286 return MCDisassembler::Fail;
3287 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3288 return MCDisassembler::Fail;
3289 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3290 return MCDisassembler::Fail;
3291 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3292 return MCDisassembler::Fail;
3297 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3298 uint64_t Address, const void *Decoder) {
3299 DecodeStatus S = MCDisassembler::Success;
3301 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3302 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3303 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3304 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3305 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3306 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3308 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3310 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3311 return MCDisassembler::Fail;
3312 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3313 return MCDisassembler::Fail;
3314 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3315 return MCDisassembler::Fail;
3316 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3317 return MCDisassembler::Fail;
3322 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3323 uint64_t Address, const void *Decoder) {
3324 DecodeStatus S = MCDisassembler::Success;
3326 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3327 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3328 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3329 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3330 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3336 return MCDisassembler::Fail;
3338 if (fieldFromInstruction32(Insn, 4, 1))
3339 return MCDisassembler::Fail; // UNDEFINED
3340 index = fieldFromInstruction32(Insn, 5, 3);
3343 if (fieldFromInstruction32(Insn, 5, 1))
3344 return MCDisassembler::Fail; // UNDEFINED
3345 index = fieldFromInstruction32(Insn, 6, 2);
3346 if (fieldFromInstruction32(Insn, 4, 1))
3350 if (fieldFromInstruction32(Insn, 6, 1))
3351 return MCDisassembler::Fail; // UNDEFINED
3352 index = fieldFromInstruction32(Insn, 7, 1);
3353 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3357 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3358 return MCDisassembler::Fail;
3359 if (Rm != 0xF) { // Writeback
3360 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3361 return MCDisassembler::Fail;
3363 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3364 return MCDisassembler::Fail;
3365 Inst.addOperand(MCOperand::CreateImm(align));
3368 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3369 return MCDisassembler::Fail;
3371 Inst.addOperand(MCOperand::CreateReg(0));
3374 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3375 return MCDisassembler::Fail;
3376 Inst.addOperand(MCOperand::CreateImm(index));
3381 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3382 uint64_t Address, const void *Decoder) {
3383 DecodeStatus S = MCDisassembler::Success;
3385 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3386 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3387 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3388 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3389 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3395 return MCDisassembler::Fail;
3397 if (fieldFromInstruction32(Insn, 4, 1))
3398 return MCDisassembler::Fail; // UNDEFINED
3399 index = fieldFromInstruction32(Insn, 5, 3);
3402 if (fieldFromInstruction32(Insn, 5, 1))
3403 return MCDisassembler::Fail; // UNDEFINED
3404 index = fieldFromInstruction32(Insn, 6, 2);
3405 if (fieldFromInstruction32(Insn, 4, 1))
3409 if (fieldFromInstruction32(Insn, 6, 1))
3410 return MCDisassembler::Fail; // UNDEFINED
3411 index = fieldFromInstruction32(Insn, 7, 1);
3412 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3416 if (Rm != 0xF) { // Writeback
3417 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3418 return MCDisassembler::Fail;
3420 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3421 return MCDisassembler::Fail;
3422 Inst.addOperand(MCOperand::CreateImm(align));
3425 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3426 return MCDisassembler::Fail;
3428 Inst.addOperand(MCOperand::CreateReg(0));
3431 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3432 return MCDisassembler::Fail;
3433 Inst.addOperand(MCOperand::CreateImm(index));
3439 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3440 uint64_t Address, const void *Decoder) {
3441 DecodeStatus S = MCDisassembler::Success;
3443 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3444 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3445 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3446 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3447 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3454 return MCDisassembler::Fail;
3456 index = fieldFromInstruction32(Insn, 5, 3);
3457 if (fieldFromInstruction32(Insn, 4, 1))
3461 index = fieldFromInstruction32(Insn, 6, 2);
3462 if (fieldFromInstruction32(Insn, 4, 1))
3464 if (fieldFromInstruction32(Insn, 5, 1))
3468 if (fieldFromInstruction32(Insn, 5, 1))
3469 return MCDisassembler::Fail; // UNDEFINED
3470 index = fieldFromInstruction32(Insn, 7, 1);
3471 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3473 if (fieldFromInstruction32(Insn, 6, 1))
3478 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3479 return MCDisassembler::Fail;
3480 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3481 return MCDisassembler::Fail;
3482 if (Rm != 0xF) { // Writeback
3483 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3484 return MCDisassembler::Fail;
3486 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3487 return MCDisassembler::Fail;
3488 Inst.addOperand(MCOperand::CreateImm(align));
3491 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3492 return MCDisassembler::Fail;
3494 Inst.addOperand(MCOperand::CreateReg(0));
3497 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3498 return MCDisassembler::Fail;
3499 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3500 return MCDisassembler::Fail;
3501 Inst.addOperand(MCOperand::CreateImm(index));
3506 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3507 uint64_t Address, const void *Decoder) {
3508 DecodeStatus S = MCDisassembler::Success;
3510 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3511 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3512 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3513 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3514 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3521 return MCDisassembler::Fail;
3523 index = fieldFromInstruction32(Insn, 5, 3);
3524 if (fieldFromInstruction32(Insn, 4, 1))
3528 index = fieldFromInstruction32(Insn, 6, 2);
3529 if (fieldFromInstruction32(Insn, 4, 1))
3531 if (fieldFromInstruction32(Insn, 5, 1))
3535 if (fieldFromInstruction32(Insn, 5, 1))
3536 return MCDisassembler::Fail; // UNDEFINED
3537 index = fieldFromInstruction32(Insn, 7, 1);
3538 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3540 if (fieldFromInstruction32(Insn, 6, 1))
3545 if (Rm != 0xF) { // Writeback
3546 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3547 return MCDisassembler::Fail;
3549 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3550 return MCDisassembler::Fail;
3551 Inst.addOperand(MCOperand::CreateImm(align));
3554 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3555 return MCDisassembler::Fail;
3557 Inst.addOperand(MCOperand::CreateReg(0));
3560 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3561 return MCDisassembler::Fail;
3562 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3563 return MCDisassembler::Fail;
3564 Inst.addOperand(MCOperand::CreateImm(index));
3570 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3571 uint64_t Address, const void *Decoder) {
3572 DecodeStatus S = MCDisassembler::Success;
3574 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3575 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3576 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3577 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3578 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3585 return MCDisassembler::Fail;
3587 if (fieldFromInstruction32(Insn, 4, 1))
3588 return MCDisassembler::Fail; // UNDEFINED
3589 index = fieldFromInstruction32(Insn, 5, 3);
3592 if (fieldFromInstruction32(Insn, 4, 1))
3593 return MCDisassembler::Fail; // UNDEFINED
3594 index = fieldFromInstruction32(Insn, 6, 2);
3595 if (fieldFromInstruction32(Insn, 5, 1))
3599 if (fieldFromInstruction32(Insn, 4, 2))
3600 return MCDisassembler::Fail; // UNDEFINED
3601 index = fieldFromInstruction32(Insn, 7, 1);
3602 if (fieldFromInstruction32(Insn, 6, 1))
3607 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3608 return MCDisassembler::Fail;
3609 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3610 return MCDisassembler::Fail;
3611 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3612 return MCDisassembler::Fail;
3614 if (Rm != 0xF) { // Writeback
3615 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3616 return MCDisassembler::Fail;
3618 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3619 return MCDisassembler::Fail;
3620 Inst.addOperand(MCOperand::CreateImm(align));
3623 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3624 return MCDisassembler::Fail;
3626 Inst.addOperand(MCOperand::CreateReg(0));
3629 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3630 return MCDisassembler::Fail;
3631 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3632 return MCDisassembler::Fail;
3633 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3634 return MCDisassembler::Fail;
3635 Inst.addOperand(MCOperand::CreateImm(index));
3640 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3641 uint64_t Address, const void *Decoder) {
3642 DecodeStatus S = MCDisassembler::Success;
3644 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3645 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3646 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3647 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3648 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3655 return MCDisassembler::Fail;
3657 if (fieldFromInstruction32(Insn, 4, 1))
3658 return MCDisassembler::Fail; // UNDEFINED
3659 index = fieldFromInstruction32(Insn, 5, 3);
3662 if (fieldFromInstruction32(Insn, 4, 1))
3663 return MCDisassembler::Fail; // UNDEFINED
3664 index = fieldFromInstruction32(Insn, 6, 2);
3665 if (fieldFromInstruction32(Insn, 5, 1))
3669 if (fieldFromInstruction32(Insn, 4, 2))
3670 return MCDisassembler::Fail; // UNDEFINED
3671 index = fieldFromInstruction32(Insn, 7, 1);
3672 if (fieldFromInstruction32(Insn, 6, 1))
3677 if (Rm != 0xF) { // Writeback
3678 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3679 return MCDisassembler::Fail;
3681 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3682 return MCDisassembler::Fail;
3683 Inst.addOperand(MCOperand::CreateImm(align));
3686 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3687 return MCDisassembler::Fail;
3689 Inst.addOperand(MCOperand::CreateReg(0));
3692 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3693 return MCDisassembler::Fail;
3694 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3695 return MCDisassembler::Fail;
3696 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3697 return MCDisassembler::Fail;
3698 Inst.addOperand(MCOperand::CreateImm(index));
3704 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3705 uint64_t Address, const void *Decoder) {
3706 DecodeStatus S = MCDisassembler::Success;
3708 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3709 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3710 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3711 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3712 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3719 return MCDisassembler::Fail;
3721 if (fieldFromInstruction32(Insn, 4, 1))
3723 index = fieldFromInstruction32(Insn, 5, 3);
3726 if (fieldFromInstruction32(Insn, 4, 1))
3728 index = fieldFromInstruction32(Insn, 6, 2);
3729 if (fieldFromInstruction32(Insn, 5, 1))
3733 if (fieldFromInstruction32(Insn, 4, 2))
3734 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3735 index = fieldFromInstruction32(Insn, 7, 1);
3736 if (fieldFromInstruction32(Insn, 6, 1))
3741 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3742 return MCDisassembler::Fail;
3743 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3744 return MCDisassembler::Fail;
3745 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3746 return MCDisassembler::Fail;
3747 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3748 return MCDisassembler::Fail;
3750 if (Rm != 0xF) { // Writeback
3751 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3752 return MCDisassembler::Fail;
3754 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3755 return MCDisassembler::Fail;
3756 Inst.addOperand(MCOperand::CreateImm(align));
3759 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3760 return MCDisassembler::Fail;
3762 Inst.addOperand(MCOperand::CreateReg(0));
3765 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3766 return MCDisassembler::Fail;
3767 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3768 return MCDisassembler::Fail;
3769 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3770 return MCDisassembler::Fail;
3771 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3772 return MCDisassembler::Fail;
3773 Inst.addOperand(MCOperand::CreateImm(index));
3778 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3779 uint64_t Address, const void *Decoder) {
3780 DecodeStatus S = MCDisassembler::Success;
3782 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3783 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3784 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3785 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3786 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3793 return MCDisassembler::Fail;
3795 if (fieldFromInstruction32(Insn, 4, 1))
3797 index = fieldFromInstruction32(Insn, 5, 3);
3800 if (fieldFromInstruction32(Insn, 4, 1))
3802 index = fieldFromInstruction32(Insn, 6, 2);
3803 if (fieldFromInstruction32(Insn, 5, 1))
3807 if (fieldFromInstruction32(Insn, 4, 2))
3808 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3809 index = fieldFromInstruction32(Insn, 7, 1);
3810 if (fieldFromInstruction32(Insn, 6, 1))
3815 if (Rm != 0xF) { // Writeback
3816 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3817 return MCDisassembler::Fail;
3819 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3820 return MCDisassembler::Fail;
3821 Inst.addOperand(MCOperand::CreateImm(align));
3824 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3825 return MCDisassembler::Fail;
3827 Inst.addOperand(MCOperand::CreateReg(0));
3830 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3831 return MCDisassembler::Fail;
3832 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3833 return MCDisassembler::Fail;
3834 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3835 return MCDisassembler::Fail;
3836 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3837 return MCDisassembler::Fail;
3838 Inst.addOperand(MCOperand::CreateImm(index));
3843 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
3844 uint64_t Address, const void *Decoder) {
3845 DecodeStatus S = MCDisassembler::Success;
3846 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3847 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3848 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3849 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3850 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3852 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3853 S = MCDisassembler::SoftFail;
3855 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3856 return MCDisassembler::Fail;
3857 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3858 return MCDisassembler::Fail;
3859 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3860 return MCDisassembler::Fail;
3861 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3862 return MCDisassembler::Fail;
3863 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3864 return MCDisassembler::Fail;
3869 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3870 uint64_t Address, const void *Decoder) {
3871 DecodeStatus S = MCDisassembler::Success;
3872 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3873 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3874 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3875 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3876 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3878 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3879 S = MCDisassembler::SoftFail;
3881 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3882 return MCDisassembler::Fail;
3883 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3884 return MCDisassembler::Fail;
3885 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3886 return MCDisassembler::Fail;
3887 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3888 return MCDisassembler::Fail;
3889 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3890 return MCDisassembler::Fail;
3895 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3896 uint64_t Address, const void *Decoder) {
3897 DecodeStatus S = MCDisassembler::Success;
3898 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3899 // The InstPrinter needs to have the low bit of the predicate in
3900 // the mask operand to be able to print it properly.
3901 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3905 S = MCDisassembler::SoftFail;
3908 if ((mask & 0xF) == 0) {
3909 // Preserve the high bit of the mask, which is the low bit of
3913 S = MCDisassembler::SoftFail;
3916 Inst.addOperand(MCOperand::CreateImm(pred));
3917 Inst.addOperand(MCOperand::CreateImm(mask));
3922 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3923 uint64_t Address, const void *Decoder) {
3924 DecodeStatus S = MCDisassembler::Success;
3926 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3927 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3928 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3929 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3930 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3931 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3932 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3933 bool writeback = (W == 1) | (P == 0);
3935 addr |= (U << 8) | (Rn << 9);
3937 if (writeback && (Rn == Rt || Rn == Rt2))
3938 Check(S, MCDisassembler::SoftFail);
3940 Check(S, MCDisassembler::SoftFail);
3943 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3944 return MCDisassembler::Fail;
3946 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3947 return MCDisassembler::Fail;
3948 // Writeback operand
3949 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3950 return MCDisassembler::Fail;
3952 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3953 return MCDisassembler::Fail;
3959 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3960 uint64_t Address, const void *Decoder) {
3961 DecodeStatus S = MCDisassembler::Success;
3963 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3964 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3965 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3966 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3967 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3968 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3969 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3970 bool writeback = (W == 1) | (P == 0);
3972 addr |= (U << 8) | (Rn << 9);
3974 if (writeback && (Rn == Rt || Rn == Rt2))
3975 Check(S, MCDisassembler::SoftFail);
3977 // Writeback operand
3978 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3979 return MCDisassembler::Fail;
3981 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3982 return MCDisassembler::Fail;
3984 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3985 return MCDisassembler::Fail;
3987 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3988 return MCDisassembler::Fail;
3993 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn,
3994 uint64_t Address, const void *Decoder) {
3995 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
3996 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
3997 if (sign1 != sign2) return MCDisassembler::Fail;
3999 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
4000 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
4001 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
4003 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4005 return MCDisassembler::Success;
4008 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, uint32_t Val,
4010 const void *Decoder) {
4011 DecodeStatus S = MCDisassembler::Success;
4013 // Shift of "asr #32" is not allowed in Thumb2 mode.
4014 if (Val == 0x20) S = MCDisassembler::SoftFail;
4015 Inst.addOperand(MCOperand::CreateImm(Val));