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("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()) {
601 // Some instructions (mostly conditional branches) are not
602 // allowed in IT blocks.
603 if (!ITBlock.empty())
612 // Some instructions (mostly unconditional branches) can
613 // only appears at the end of, or outside of, an IT.
614 if (ITBlock.size() > 1)
621 // If we're in an IT block, base the predicate on that. Otherwise,
622 // assume a predicate of AL.
624 if (!ITBlock.empty()) {
632 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
633 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
634 MCInst::iterator I = MI.begin();
635 for (unsigned i = 0; i < NumOps; ++i, ++I) {
636 if (I == MI.end()) break;
637 if (OpInfo[i].isPredicate()) {
638 I = MI.insert(I, MCOperand::CreateImm(CC));
641 MI.insert(I, MCOperand::CreateReg(0));
643 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
648 I = MI.insert(I, MCOperand::CreateImm(CC));
651 MI.insert(I, MCOperand::CreateReg(0));
653 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
658 // Thumb VFP instructions are a special case. Because we share their
659 // encodings between ARM and Thumb modes, and they are predicable in ARM
660 // mode, the auto-generated decoder will give them an (incorrect)
661 // predicate operand. We need to rewrite these operands based on the IT
662 // context as a post-pass.
663 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
665 if (!ITBlock.empty()) {
671 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
672 MCInst::iterator I = MI.begin();
673 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
674 for (unsigned i = 0; i < NumOps; ++i, ++I) {
675 if (OpInfo[i].isPredicate() ) {
681 I->setReg(ARM::CPSR);
687 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
688 const MemoryObject &Region,
691 raw_ostream &cs) const {
696 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
697 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
699 // We want to read exactly 2 bytes of data.
700 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
702 return MCDisassembler::Fail;
705 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
706 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
707 if (result != MCDisassembler::Fail) {
709 Check(result, AddThumbPredicate(MI));
714 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
717 bool InITBlock = !ITBlock.empty();
718 Check(result, AddThumbPredicate(MI));
719 AddThumb1SBit(MI, InITBlock);
724 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
725 if (result != MCDisassembler::Fail) {
728 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
729 // the Thumb predicate.
730 if (MI.getOpcode() == ARM::t2IT && !ITBlock.empty())
731 result = MCDisassembler::SoftFail;
733 Check(result, AddThumbPredicate(MI));
735 // If we find an IT instruction, we need to parse its condition
736 // code and mask operands so that we can apply them correctly
737 // to the subsequent instructions.
738 if (MI.getOpcode() == ARM::t2IT) {
740 // (3 - the number of trailing zeros) is the number of then / else.
741 unsigned firstcond = MI.getOperand(0).getImm();
742 unsigned Mask = MI.getOperand(1).getImm();
743 unsigned CondBit0 = Mask >> 4 & 1;
744 unsigned NumTZ = CountTrailingZeros_32(Mask);
745 assert(NumTZ <= 3 && "Invalid IT mask!");
746 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
747 bool T = ((Mask >> Pos) & 1) == CondBit0;
749 ITBlock.insert(ITBlock.begin(), firstcond);
751 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
754 ITBlock.push_back(firstcond);
760 // We want to read exactly 4 bytes of data.
761 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
763 return MCDisassembler::Fail;
766 uint32_t insn32 = (bytes[3] << 8) |
771 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
772 if (result != MCDisassembler::Fail) {
774 bool InITBlock = ITBlock.size();
775 Check(result, AddThumbPredicate(MI));
776 AddThumb1SBit(MI, InITBlock);
781 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
782 if (result != MCDisassembler::Fail) {
784 Check(result, AddThumbPredicate(MI));
789 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
790 if (result != MCDisassembler::Fail) {
792 UpdateThumbVFPPredicate(MI);
797 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
798 if (result != MCDisassembler::Fail) {
800 Check(result, AddThumbPredicate(MI));
804 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
806 uint32_t NEONLdStInsn = insn32;
807 NEONLdStInsn &= 0xF0FFFFFF;
808 NEONLdStInsn |= 0x04000000;
809 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
810 if (result != MCDisassembler::Fail) {
812 Check(result, AddThumbPredicate(MI));
817 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
819 uint32_t NEONDataInsn = insn32;
820 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
821 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
822 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
823 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
824 if (result != MCDisassembler::Fail) {
826 Check(result, AddThumbPredicate(MI));
832 return MCDisassembler::Fail;
836 extern "C" void LLVMInitializeARMDisassembler() {
837 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
838 createARMDisassembler);
839 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
840 createThumbDisassembler);
843 static const unsigned GPRDecoderTable[] = {
844 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
845 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
846 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
847 ARM::R12, ARM::SP, ARM::LR, ARM::PC
850 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
851 uint64_t Address, const void *Decoder) {
853 return MCDisassembler::Fail;
855 unsigned Register = GPRDecoderTable[RegNo];
856 Inst.addOperand(MCOperand::CreateReg(Register));
857 return MCDisassembler::Success;
861 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
862 uint64_t Address, const void *Decoder) {
863 if (RegNo == 15) return MCDisassembler::Fail;
864 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
867 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
868 uint64_t Address, const void *Decoder) {
870 return MCDisassembler::Fail;
871 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
874 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
875 uint64_t Address, const void *Decoder) {
876 unsigned Register = 0;
897 return MCDisassembler::Fail;
900 Inst.addOperand(MCOperand::CreateReg(Register));
901 return MCDisassembler::Success;
904 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
905 uint64_t Address, const void *Decoder) {
906 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
907 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
910 static const unsigned SPRDecoderTable[] = {
911 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
912 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
913 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
914 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
915 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
916 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
917 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
918 ARM::S28, ARM::S29, ARM::S30, ARM::S31
921 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
922 uint64_t Address, const void *Decoder) {
924 return MCDisassembler::Fail;
926 unsigned Register = SPRDecoderTable[RegNo];
927 Inst.addOperand(MCOperand::CreateReg(Register));
928 return MCDisassembler::Success;
931 static const unsigned DPRDecoderTable[] = {
932 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
933 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
934 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
935 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
936 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
937 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
938 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
939 ARM::D28, ARM::D29, ARM::D30, ARM::D31
942 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
943 uint64_t Address, const void *Decoder) {
945 return MCDisassembler::Fail;
947 unsigned Register = DPRDecoderTable[RegNo];
948 Inst.addOperand(MCOperand::CreateReg(Register));
949 return MCDisassembler::Success;
952 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
953 uint64_t Address, const void *Decoder) {
955 return MCDisassembler::Fail;
956 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
960 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
961 uint64_t Address, const void *Decoder) {
963 return MCDisassembler::Fail;
964 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
967 static const unsigned QPRDecoderTable[] = {
968 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
969 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
970 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
971 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
975 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
976 uint64_t Address, const void *Decoder) {
978 return MCDisassembler::Fail;
981 unsigned Register = QPRDecoderTable[RegNo];
982 Inst.addOperand(MCOperand::CreateReg(Register));
983 return MCDisassembler::Success;
986 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
987 uint64_t Address, const void *Decoder) {
988 if (Val == 0xF) return MCDisassembler::Fail;
989 // AL predicate is not allowed on Thumb1 branches.
990 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
991 return MCDisassembler::Fail;
992 Inst.addOperand(MCOperand::CreateImm(Val));
993 if (Val == ARMCC::AL) {
994 Inst.addOperand(MCOperand::CreateReg(0));
996 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
997 return MCDisassembler::Success;
1000 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
1001 uint64_t Address, const void *Decoder) {
1003 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1005 Inst.addOperand(MCOperand::CreateReg(0));
1006 return MCDisassembler::Success;
1009 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
1010 uint64_t Address, const void *Decoder) {
1011 uint32_t imm = Val & 0xFF;
1012 uint32_t rot = (Val & 0xF00) >> 7;
1013 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
1014 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1015 return MCDisassembler::Success;
1018 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
1019 uint64_t Address, const void *Decoder) {
1020 DecodeStatus S = MCDisassembler::Success;
1022 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1023 unsigned type = fieldFromInstruction32(Val, 5, 2);
1024 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1026 // Register-immediate
1027 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1028 return MCDisassembler::Fail;
1030 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1033 Shift = ARM_AM::lsl;
1036 Shift = ARM_AM::lsr;
1039 Shift = ARM_AM::asr;
1042 Shift = ARM_AM::ror;
1046 if (Shift == ARM_AM::ror && imm == 0)
1047 Shift = ARM_AM::rrx;
1049 unsigned Op = Shift | (imm << 3);
1050 Inst.addOperand(MCOperand::CreateImm(Op));
1055 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
1056 uint64_t Address, const void *Decoder) {
1057 DecodeStatus S = MCDisassembler::Success;
1059 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1060 unsigned type = fieldFromInstruction32(Val, 5, 2);
1061 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
1063 // Register-register
1064 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1065 return MCDisassembler::Fail;
1066 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1067 return MCDisassembler::Fail;
1069 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1072 Shift = ARM_AM::lsl;
1075 Shift = ARM_AM::lsr;
1078 Shift = ARM_AM::asr;
1081 Shift = ARM_AM::ror;
1085 Inst.addOperand(MCOperand::CreateImm(Shift));
1090 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
1091 uint64_t Address, const void *Decoder) {
1092 DecodeStatus S = MCDisassembler::Success;
1094 bool writebackLoad = false;
1095 unsigned writebackReg = 0;
1096 switch (Inst.getOpcode()) {
1099 case ARM::LDMIA_UPD:
1100 case ARM::LDMDB_UPD:
1101 case ARM::LDMIB_UPD:
1102 case ARM::LDMDA_UPD:
1103 case ARM::t2LDMIA_UPD:
1104 case ARM::t2LDMDB_UPD:
1105 writebackLoad = true;
1106 writebackReg = Inst.getOperand(0).getReg();
1110 // Empty register lists are not allowed.
1111 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
1112 for (unsigned i = 0; i < 16; ++i) {
1113 if (Val & (1 << i)) {
1114 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1115 return MCDisassembler::Fail;
1116 // Writeback not allowed if Rn is in the target list.
1117 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1118 Check(S, MCDisassembler::SoftFail);
1125 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
1126 uint64_t Address, const void *Decoder) {
1127 DecodeStatus S = MCDisassembler::Success;
1129 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1130 unsigned regs = Val & 0xFF;
1132 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1133 return MCDisassembler::Fail;
1134 for (unsigned i = 0; i < (regs - 1); ++i) {
1135 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1136 return MCDisassembler::Fail;
1142 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
1143 uint64_t Address, const void *Decoder) {
1144 DecodeStatus S = MCDisassembler::Success;
1146 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
1147 unsigned regs = (Val & 0xFF) / 2;
1149 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1150 return MCDisassembler::Fail;
1151 for (unsigned i = 0; i < (regs - 1); ++i) {
1152 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1153 return MCDisassembler::Fail;
1159 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
1160 uint64_t Address, const void *Decoder) {
1161 // This operand encodes a mask of contiguous zeros between a specified MSB
1162 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1163 // the mask of all bits LSB-and-lower, and then xor them to create
1164 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1165 // create the final mask.
1166 unsigned msb = fieldFromInstruction32(Val, 5, 5);
1167 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
1169 DecodeStatus S = MCDisassembler::Success;
1170 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1172 uint32_t msb_mask = 0xFFFFFFFF;
1173 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1174 uint32_t lsb_mask = (1U << lsb) - 1;
1176 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1180 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
1181 uint64_t Address, const void *Decoder) {
1182 DecodeStatus S = MCDisassembler::Success;
1184 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1185 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
1186 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
1187 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
1188 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1189 unsigned U = fieldFromInstruction32(Insn, 23, 1);
1191 switch (Inst.getOpcode()) {
1192 case ARM::LDC_OFFSET:
1195 case ARM::LDC_OPTION:
1196 case ARM::LDCL_OFFSET:
1198 case ARM::LDCL_POST:
1199 case ARM::LDCL_OPTION:
1200 case ARM::STC_OFFSET:
1203 case ARM::STC_OPTION:
1204 case ARM::STCL_OFFSET:
1206 case ARM::STCL_POST:
1207 case ARM::STCL_OPTION:
1208 case ARM::t2LDC_OFFSET:
1209 case ARM::t2LDC_PRE:
1210 case ARM::t2LDC_POST:
1211 case ARM::t2LDC_OPTION:
1212 case ARM::t2LDCL_OFFSET:
1213 case ARM::t2LDCL_PRE:
1214 case ARM::t2LDCL_POST:
1215 case ARM::t2LDCL_OPTION:
1216 case ARM::t2STC_OFFSET:
1217 case ARM::t2STC_PRE:
1218 case ARM::t2STC_POST:
1219 case ARM::t2STC_OPTION:
1220 case ARM::t2STCL_OFFSET:
1221 case ARM::t2STCL_PRE:
1222 case ARM::t2STCL_POST:
1223 case ARM::t2STCL_OPTION:
1224 if (coproc == 0xA || coproc == 0xB)
1225 return MCDisassembler::Fail;
1231 Inst.addOperand(MCOperand::CreateImm(coproc));
1232 Inst.addOperand(MCOperand::CreateImm(CRd));
1233 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1234 return MCDisassembler::Fail;
1236 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1237 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1239 bool writeback = (P == 0) || (W == 1);
1240 unsigned idx_mode = 0;
1242 idx_mode = ARMII::IndexModePre;
1243 else if (!P && writeback)
1244 idx_mode = ARMII::IndexModePost;
1246 switch (Inst.getOpcode()) {
1247 case ARM::LDCL_POST:
1248 case ARM::STCL_POST:
1249 case ARM::t2LDCL_POST:
1250 case ARM::t2STCL_POST:
1251 case ARM::LDC2L_POST:
1252 case ARM::STC2L_POST:
1254 case ARM::LDC_OPTION:
1255 case ARM::LDCL_OPTION:
1256 case ARM::LDC2_OPTION:
1257 case ARM::LDC2L_OPTION:
1258 case ARM::STC_OPTION:
1259 case ARM::STCL_OPTION:
1260 case ARM::STC2_OPTION:
1261 case ARM::STC2L_OPTION:
1262 case ARM::t2LDC_OPTION:
1263 case ARM::t2LDCL_OPTION:
1264 case ARM::t2STC_OPTION:
1265 case ARM::t2STCL_OPTION:
1266 Inst.addOperand(MCOperand::CreateImm(imm));
1270 Inst.addOperand(MCOperand::CreateImm(
1271 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
1273 Inst.addOperand(MCOperand::CreateImm(
1274 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
1278 switch (Inst.getOpcode()) {
1279 case ARM::LDC_OFFSET:
1282 case ARM::LDC_OPTION:
1283 case ARM::LDCL_OFFSET:
1285 case ARM::LDCL_POST:
1286 case ARM::LDCL_OPTION:
1287 case ARM::STC_OFFSET:
1290 case ARM::STC_OPTION:
1291 case ARM::STCL_OFFSET:
1293 case ARM::STCL_POST:
1294 case ARM::STCL_OPTION:
1295 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1296 return MCDisassembler::Fail;
1306 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1307 uint64_t Address, const void *Decoder) {
1308 DecodeStatus S = MCDisassembler::Success;
1310 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1311 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1312 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1313 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1314 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1315 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1316 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1317 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1319 // On stores, the writeback operand precedes Rt.
1320 switch (Inst.getOpcode()) {
1321 case ARM::STR_POST_IMM:
1322 case ARM::STR_POST_REG:
1323 case ARM::STRB_POST_IMM:
1324 case ARM::STRB_POST_REG:
1325 case ARM::STRT_POST_REG:
1326 case ARM::STRT_POST_IMM:
1327 case ARM::STRBT_POST_REG:
1328 case ARM::STRBT_POST_IMM:
1329 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1330 return MCDisassembler::Fail;
1336 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1337 return MCDisassembler::Fail;
1339 // On loads, the writeback operand comes after Rt.
1340 switch (Inst.getOpcode()) {
1341 case ARM::LDR_POST_IMM:
1342 case ARM::LDR_POST_REG:
1343 case ARM::LDRB_POST_IMM:
1344 case ARM::LDRB_POST_REG:
1345 case ARM::LDRBT_POST_REG:
1346 case ARM::LDRBT_POST_IMM:
1347 case ARM::LDRT_POST_REG:
1348 case ARM::LDRT_POST_IMM:
1349 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1350 return MCDisassembler::Fail;
1356 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1357 return MCDisassembler::Fail;
1359 ARM_AM::AddrOpc Op = ARM_AM::add;
1360 if (!fieldFromInstruction32(Insn, 23, 1))
1363 bool writeback = (P == 0) || (W == 1);
1364 unsigned idx_mode = 0;
1366 idx_mode = ARMII::IndexModePre;
1367 else if (!P && writeback)
1368 idx_mode = ARMII::IndexModePost;
1370 if (writeback && (Rn == 15 || Rn == Rt))
1371 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1374 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1375 return MCDisassembler::Fail;
1376 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1377 switch( fieldFromInstruction32(Insn, 5, 2)) {
1391 return MCDisassembler::Fail;
1393 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1394 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1396 Inst.addOperand(MCOperand::CreateImm(imm));
1398 Inst.addOperand(MCOperand::CreateReg(0));
1399 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1400 Inst.addOperand(MCOperand::CreateImm(tmp));
1403 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1404 return MCDisassembler::Fail;
1409 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1410 uint64_t Address, const void *Decoder) {
1411 DecodeStatus S = MCDisassembler::Success;
1413 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1414 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1415 unsigned type = fieldFromInstruction32(Val, 5, 2);
1416 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1417 unsigned U = fieldFromInstruction32(Val, 12, 1);
1419 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1435 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1436 return MCDisassembler::Fail;
1437 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1438 return MCDisassembler::Fail;
1441 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1443 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1444 Inst.addOperand(MCOperand::CreateImm(shift));
1450 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1451 uint64_t Address, const void *Decoder) {
1452 DecodeStatus S = MCDisassembler::Success;
1454 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1455 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1456 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1457 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1458 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1459 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1460 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1461 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1462 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1464 bool writeback = (W == 1) | (P == 0);
1466 // For {LD,ST}RD, Rt must be even, else undefined.
1467 switch (Inst.getOpcode()) {
1470 case ARM::STRD_POST:
1473 case ARM::LDRD_POST:
1474 if (Rt & 0x1) return MCDisassembler::Fail;
1480 if (writeback) { // Writeback
1482 U |= ARMII::IndexModePre << 9;
1484 U |= ARMII::IndexModePost << 9;
1486 // On stores, the writeback operand precedes Rt.
1487 switch (Inst.getOpcode()) {
1490 case ARM::STRD_POST:
1493 case ARM::STRH_POST:
1494 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1495 return MCDisassembler::Fail;
1502 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1503 return MCDisassembler::Fail;
1504 switch (Inst.getOpcode()) {
1507 case ARM::STRD_POST:
1510 case ARM::LDRD_POST:
1511 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1512 return MCDisassembler::Fail;
1519 // On loads, the writeback operand comes after Rt.
1520 switch (Inst.getOpcode()) {
1523 case ARM::LDRD_POST:
1526 case ARM::LDRH_POST:
1528 case ARM::LDRSH_PRE:
1529 case ARM::LDRSH_POST:
1531 case ARM::LDRSB_PRE:
1532 case ARM::LDRSB_POST:
1535 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1536 return MCDisassembler::Fail;
1543 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1544 return MCDisassembler::Fail;
1547 Inst.addOperand(MCOperand::CreateReg(0));
1548 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1550 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1551 return MCDisassembler::Fail;
1552 Inst.addOperand(MCOperand::CreateImm(U));
1555 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1556 return MCDisassembler::Fail;
1561 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1562 uint64_t Address, const void *Decoder) {
1563 DecodeStatus S = MCDisassembler::Success;
1565 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1566 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1583 Inst.addOperand(MCOperand::CreateImm(mode));
1584 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1585 return MCDisassembler::Fail;
1590 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1592 uint64_t Address, const void *Decoder) {
1593 DecodeStatus S = MCDisassembler::Success;
1595 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1596 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1597 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1600 switch (Inst.getOpcode()) {
1602 Inst.setOpcode(ARM::RFEDA);
1604 case ARM::LDMDA_UPD:
1605 Inst.setOpcode(ARM::RFEDA_UPD);
1608 Inst.setOpcode(ARM::RFEDB);
1610 case ARM::LDMDB_UPD:
1611 Inst.setOpcode(ARM::RFEDB_UPD);
1614 Inst.setOpcode(ARM::RFEIA);
1616 case ARM::LDMIA_UPD:
1617 Inst.setOpcode(ARM::RFEIA_UPD);
1620 Inst.setOpcode(ARM::RFEIB);
1622 case ARM::LDMIB_UPD:
1623 Inst.setOpcode(ARM::RFEIB_UPD);
1626 Inst.setOpcode(ARM::SRSDA);
1628 case ARM::STMDA_UPD:
1629 Inst.setOpcode(ARM::SRSDA_UPD);
1632 Inst.setOpcode(ARM::SRSDB);
1634 case ARM::STMDB_UPD:
1635 Inst.setOpcode(ARM::SRSDB_UPD);
1638 Inst.setOpcode(ARM::SRSIA);
1640 case ARM::STMIA_UPD:
1641 Inst.setOpcode(ARM::SRSIA_UPD);
1644 Inst.setOpcode(ARM::SRSIB);
1646 case ARM::STMIB_UPD:
1647 Inst.setOpcode(ARM::SRSIB_UPD);
1650 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1653 // For stores (which become SRS's, the only operand is the mode.
1654 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1656 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1660 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1663 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1664 return MCDisassembler::Fail;
1665 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1666 return MCDisassembler::Fail; // Tied
1667 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1668 return MCDisassembler::Fail;
1669 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1670 return MCDisassembler::Fail;
1675 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1676 uint64_t Address, const void *Decoder) {
1677 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1678 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1679 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1680 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1682 DecodeStatus S = MCDisassembler::Success;
1684 // imod == '01' --> UNPREDICTABLE
1685 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1686 // return failure here. The '01' imod value is unprintable, so there's
1687 // nothing useful we could do even if we returned UNPREDICTABLE.
1689 if (imod == 1) return MCDisassembler::Fail;
1692 Inst.setOpcode(ARM::CPS3p);
1693 Inst.addOperand(MCOperand::CreateImm(imod));
1694 Inst.addOperand(MCOperand::CreateImm(iflags));
1695 Inst.addOperand(MCOperand::CreateImm(mode));
1696 } else if (imod && !M) {
1697 Inst.setOpcode(ARM::CPS2p);
1698 Inst.addOperand(MCOperand::CreateImm(imod));
1699 Inst.addOperand(MCOperand::CreateImm(iflags));
1700 if (mode) S = MCDisassembler::SoftFail;
1701 } else if (!imod && M) {
1702 Inst.setOpcode(ARM::CPS1p);
1703 Inst.addOperand(MCOperand::CreateImm(mode));
1704 if (iflags) S = MCDisassembler::SoftFail;
1706 // imod == '00' && M == '0' --> UNPREDICTABLE
1707 Inst.setOpcode(ARM::CPS1p);
1708 Inst.addOperand(MCOperand::CreateImm(mode));
1709 S = MCDisassembler::SoftFail;
1715 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1716 uint64_t Address, const void *Decoder) {
1717 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1718 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1719 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1720 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1722 DecodeStatus S = MCDisassembler::Success;
1724 // imod == '01' --> UNPREDICTABLE
1725 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1726 // return failure here. The '01' imod value is unprintable, so there's
1727 // nothing useful we could do even if we returned UNPREDICTABLE.
1729 if (imod == 1) return MCDisassembler::Fail;
1732 Inst.setOpcode(ARM::t2CPS3p);
1733 Inst.addOperand(MCOperand::CreateImm(imod));
1734 Inst.addOperand(MCOperand::CreateImm(iflags));
1735 Inst.addOperand(MCOperand::CreateImm(mode));
1736 } else if (imod && !M) {
1737 Inst.setOpcode(ARM::t2CPS2p);
1738 Inst.addOperand(MCOperand::CreateImm(imod));
1739 Inst.addOperand(MCOperand::CreateImm(iflags));
1740 if (mode) S = MCDisassembler::SoftFail;
1741 } else if (!imod && M) {
1742 Inst.setOpcode(ARM::t2CPS1p);
1743 Inst.addOperand(MCOperand::CreateImm(mode));
1744 if (iflags) S = MCDisassembler::SoftFail;
1746 // imod == '00' && M == '0' --> UNPREDICTABLE
1747 Inst.setOpcode(ARM::t2CPS1p);
1748 Inst.addOperand(MCOperand::CreateImm(mode));
1749 S = MCDisassembler::SoftFail;
1755 static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1756 uint64_t Address, const void *Decoder) {
1757 DecodeStatus S = MCDisassembler::Success;
1759 unsigned Rd = fieldFromInstruction32(Insn, 8, 4);
1762 imm |= (fieldFromInstruction32(Insn, 0, 8) << 0);
1763 imm |= (fieldFromInstruction32(Insn, 12, 3) << 8);
1764 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1765 imm |= (fieldFromInstruction32(Insn, 26, 1) << 11);
1767 if (Inst.getOpcode() == ARM::t2MOVTi16)
1768 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1769 return MCDisassembler::Fail;
1770 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1771 return MCDisassembler::Fail;
1773 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1774 Inst.addOperand(MCOperand::CreateImm(imm));
1779 static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1780 uint64_t Address, const void *Decoder) {
1781 DecodeStatus S = MCDisassembler::Success;
1783 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1784 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1787 imm |= (fieldFromInstruction32(Insn, 0, 12) << 0);
1788 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1790 if (Inst.getOpcode() == ARM::MOVTi16)
1791 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1792 return MCDisassembler::Fail;
1793 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1794 return MCDisassembler::Fail;
1796 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1797 Inst.addOperand(MCOperand::CreateImm(imm));
1799 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1800 return MCDisassembler::Fail;
1805 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1806 uint64_t Address, const void *Decoder) {
1807 DecodeStatus S = MCDisassembler::Success;
1809 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1810 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1811 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1812 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1813 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1816 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1818 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1819 return MCDisassembler::Fail;
1820 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1821 return MCDisassembler::Fail;
1822 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1823 return MCDisassembler::Fail;
1824 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1825 return MCDisassembler::Fail;
1827 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1828 return MCDisassembler::Fail;
1833 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1834 uint64_t Address, const void *Decoder) {
1835 DecodeStatus S = MCDisassembler::Success;
1837 unsigned add = fieldFromInstruction32(Val, 12, 1);
1838 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1839 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1841 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1842 return MCDisassembler::Fail;
1844 if (!add) imm *= -1;
1845 if (imm == 0 && !add) imm = INT32_MIN;
1846 Inst.addOperand(MCOperand::CreateImm(imm));
1848 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
1853 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1854 uint64_t Address, const void *Decoder) {
1855 DecodeStatus S = MCDisassembler::Success;
1857 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1858 unsigned U = fieldFromInstruction32(Val, 8, 1);
1859 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1861 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1862 return MCDisassembler::Fail;
1865 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1867 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1872 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1873 uint64_t Address, const void *Decoder) {
1874 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1878 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1879 uint64_t Address, const void *Decoder) {
1880 DecodeStatus S = MCDisassembler::Success;
1882 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1883 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1886 Inst.setOpcode(ARM::BLXi);
1887 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1888 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1892 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8, true,
1894 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1895 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1896 return MCDisassembler::Fail;
1902 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1903 uint64_t Address, const void *Decoder) {
1904 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1905 return MCDisassembler::Success;
1908 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1909 uint64_t Address, const void *Decoder) {
1910 DecodeStatus S = MCDisassembler::Success;
1912 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1913 unsigned align = fieldFromInstruction32(Val, 4, 2);
1915 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1916 return MCDisassembler::Fail;
1918 Inst.addOperand(MCOperand::CreateImm(0));
1920 Inst.addOperand(MCOperand::CreateImm(4 << align));
1925 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1926 uint64_t Address, const void *Decoder) {
1927 DecodeStatus S = MCDisassembler::Success;
1929 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1930 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1931 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1932 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1933 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1934 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1936 // First output register
1937 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1938 return MCDisassembler::Fail;
1940 // Second output register
1941 switch (Inst.getOpcode()) {
1946 case ARM::VLD1q8_UPD:
1947 case ARM::VLD1q16_UPD:
1948 case ARM::VLD1q32_UPD:
1949 case ARM::VLD1q64_UPD:
1954 case ARM::VLD1d8T_UPD:
1955 case ARM::VLD1d16T_UPD:
1956 case ARM::VLD1d32T_UPD:
1957 case ARM::VLD1d64T_UPD:
1962 case ARM::VLD1d8Q_UPD:
1963 case ARM::VLD1d16Q_UPD:
1964 case ARM::VLD1d32Q_UPD:
1965 case ARM::VLD1d64Q_UPD:
1969 case ARM::VLD2d8_UPD:
1970 case ARM::VLD2d16_UPD:
1971 case ARM::VLD2d32_UPD:
1975 case ARM::VLD2q8_UPD:
1976 case ARM::VLD2q16_UPD:
1977 case ARM::VLD2q32_UPD:
1981 case ARM::VLD3d8_UPD:
1982 case ARM::VLD3d16_UPD:
1983 case ARM::VLD3d32_UPD:
1987 case ARM::VLD4d8_UPD:
1988 case ARM::VLD4d16_UPD:
1989 case ARM::VLD4d32_UPD:
1990 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
1991 return MCDisassembler::Fail;
1996 case ARM::VLD2b8_UPD:
1997 case ARM::VLD2b16_UPD:
1998 case ARM::VLD2b32_UPD:
2002 case ARM::VLD3q8_UPD:
2003 case ARM::VLD3q16_UPD:
2004 case ARM::VLD3q32_UPD:
2008 case ARM::VLD4q8_UPD:
2009 case ARM::VLD4q16_UPD:
2010 case ARM::VLD4q32_UPD:
2011 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2012 return MCDisassembler::Fail;
2017 // Third output register
2018 switch(Inst.getOpcode()) {
2023 case ARM::VLD1d8T_UPD:
2024 case ARM::VLD1d16T_UPD:
2025 case ARM::VLD1d32T_UPD:
2026 case ARM::VLD1d64T_UPD:
2031 case ARM::VLD1d8Q_UPD:
2032 case ARM::VLD1d16Q_UPD:
2033 case ARM::VLD1d32Q_UPD:
2034 case ARM::VLD1d64Q_UPD:
2038 case ARM::VLD2q8_UPD:
2039 case ARM::VLD2q16_UPD:
2040 case ARM::VLD2q32_UPD:
2044 case ARM::VLD3d8_UPD:
2045 case ARM::VLD3d16_UPD:
2046 case ARM::VLD3d32_UPD:
2050 case ARM::VLD4d8_UPD:
2051 case ARM::VLD4d16_UPD:
2052 case ARM::VLD4d32_UPD:
2053 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2054 return MCDisassembler::Fail;
2059 case ARM::VLD3q8_UPD:
2060 case ARM::VLD3q16_UPD:
2061 case ARM::VLD3q32_UPD:
2065 case ARM::VLD4q8_UPD:
2066 case ARM::VLD4q16_UPD:
2067 case ARM::VLD4q32_UPD:
2068 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2069 return MCDisassembler::Fail;
2075 // Fourth output register
2076 switch (Inst.getOpcode()) {
2081 case ARM::VLD1d8Q_UPD:
2082 case ARM::VLD1d16Q_UPD:
2083 case ARM::VLD1d32Q_UPD:
2084 case ARM::VLD1d64Q_UPD:
2088 case ARM::VLD2q8_UPD:
2089 case ARM::VLD2q16_UPD:
2090 case ARM::VLD2q32_UPD:
2094 case ARM::VLD4d8_UPD:
2095 case ARM::VLD4d16_UPD:
2096 case ARM::VLD4d32_UPD:
2097 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2098 return MCDisassembler::Fail;
2103 case ARM::VLD4q8_UPD:
2104 case ARM::VLD4q16_UPD:
2105 case ARM::VLD4q32_UPD:
2106 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2107 return MCDisassembler::Fail;
2113 // Writeback operand
2114 switch (Inst.getOpcode()) {
2115 case ARM::VLD1d8_UPD:
2116 case ARM::VLD1d16_UPD:
2117 case ARM::VLD1d32_UPD:
2118 case ARM::VLD1d64_UPD:
2119 case ARM::VLD1q8_UPD:
2120 case ARM::VLD1q16_UPD:
2121 case ARM::VLD1q32_UPD:
2122 case ARM::VLD1q64_UPD:
2123 case ARM::VLD1d8T_UPD:
2124 case ARM::VLD1d16T_UPD:
2125 case ARM::VLD1d32T_UPD:
2126 case ARM::VLD1d64T_UPD:
2127 case ARM::VLD1d8Q_UPD:
2128 case ARM::VLD1d16Q_UPD:
2129 case ARM::VLD1d32Q_UPD:
2130 case ARM::VLD1d64Q_UPD:
2131 case ARM::VLD2d8_UPD:
2132 case ARM::VLD2d16_UPD:
2133 case ARM::VLD2d32_UPD:
2134 case ARM::VLD2q8_UPD:
2135 case ARM::VLD2q16_UPD:
2136 case ARM::VLD2q32_UPD:
2137 case ARM::VLD2b8_UPD:
2138 case ARM::VLD2b16_UPD:
2139 case ARM::VLD2b32_UPD:
2140 case ARM::VLD3d8_UPD:
2141 case ARM::VLD3d16_UPD:
2142 case ARM::VLD3d32_UPD:
2143 case ARM::VLD3q8_UPD:
2144 case ARM::VLD3q16_UPD:
2145 case ARM::VLD3q32_UPD:
2146 case ARM::VLD4d8_UPD:
2147 case ARM::VLD4d16_UPD:
2148 case ARM::VLD4d32_UPD:
2149 case ARM::VLD4q8_UPD:
2150 case ARM::VLD4q16_UPD:
2151 case ARM::VLD4q32_UPD:
2152 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2153 return MCDisassembler::Fail;
2159 // AddrMode6 Base (register+alignment)
2160 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2161 return MCDisassembler::Fail;
2163 // AddrMode6 Offset (register)
2165 Inst.addOperand(MCOperand::CreateReg(0));
2166 else if (Rm != 0xF) {
2167 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2168 return MCDisassembler::Fail;
2174 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
2175 uint64_t Address, const void *Decoder) {
2176 DecodeStatus S = MCDisassembler::Success;
2178 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2179 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2180 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
2181 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2182 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2183 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2185 // Writeback Operand
2186 switch (Inst.getOpcode()) {
2187 case ARM::VST1d8_UPD:
2188 case ARM::VST1d16_UPD:
2189 case ARM::VST1d32_UPD:
2190 case ARM::VST1d64_UPD:
2191 case ARM::VST1q8_UPD:
2192 case ARM::VST1q16_UPD:
2193 case ARM::VST1q32_UPD:
2194 case ARM::VST1q64_UPD:
2195 case ARM::VST1d8T_UPD:
2196 case ARM::VST1d16T_UPD:
2197 case ARM::VST1d32T_UPD:
2198 case ARM::VST1d64T_UPD:
2199 case ARM::VST1d8Q_UPD:
2200 case ARM::VST1d16Q_UPD:
2201 case ARM::VST1d32Q_UPD:
2202 case ARM::VST1d64Q_UPD:
2203 case ARM::VST2d8_UPD:
2204 case ARM::VST2d16_UPD:
2205 case ARM::VST2d32_UPD:
2206 case ARM::VST2q8_UPD:
2207 case ARM::VST2q16_UPD:
2208 case ARM::VST2q32_UPD:
2209 case ARM::VST2b8_UPD:
2210 case ARM::VST2b16_UPD:
2211 case ARM::VST2b32_UPD:
2212 case ARM::VST3d8_UPD:
2213 case ARM::VST3d16_UPD:
2214 case ARM::VST3d32_UPD:
2215 case ARM::VST3q8_UPD:
2216 case ARM::VST3q16_UPD:
2217 case ARM::VST3q32_UPD:
2218 case ARM::VST4d8_UPD:
2219 case ARM::VST4d16_UPD:
2220 case ARM::VST4d32_UPD:
2221 case ARM::VST4q8_UPD:
2222 case ARM::VST4q16_UPD:
2223 case ARM::VST4q32_UPD:
2224 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2225 return MCDisassembler::Fail;
2231 // AddrMode6 Base (register+alignment)
2232 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2233 return MCDisassembler::Fail;
2235 // AddrMode6 Offset (register)
2237 Inst.addOperand(MCOperand::CreateReg(0));
2238 else if (Rm != 0xF) {
2239 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2240 return MCDisassembler::Fail;
2243 // First input register
2244 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2245 return MCDisassembler::Fail;
2247 // Second input register
2248 switch (Inst.getOpcode()) {
2253 case ARM::VST1q8_UPD:
2254 case ARM::VST1q16_UPD:
2255 case ARM::VST1q32_UPD:
2256 case ARM::VST1q64_UPD:
2261 case ARM::VST1d8T_UPD:
2262 case ARM::VST1d16T_UPD:
2263 case ARM::VST1d32T_UPD:
2264 case ARM::VST1d64T_UPD:
2269 case ARM::VST1d8Q_UPD:
2270 case ARM::VST1d16Q_UPD:
2271 case ARM::VST1d32Q_UPD:
2272 case ARM::VST1d64Q_UPD:
2276 case ARM::VST2d8_UPD:
2277 case ARM::VST2d16_UPD:
2278 case ARM::VST2d32_UPD:
2282 case ARM::VST2q8_UPD:
2283 case ARM::VST2q16_UPD:
2284 case ARM::VST2q32_UPD:
2288 case ARM::VST3d8_UPD:
2289 case ARM::VST3d16_UPD:
2290 case ARM::VST3d32_UPD:
2294 case ARM::VST4d8_UPD:
2295 case ARM::VST4d16_UPD:
2296 case ARM::VST4d32_UPD:
2297 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2298 return MCDisassembler::Fail;
2303 case ARM::VST2b8_UPD:
2304 case ARM::VST2b16_UPD:
2305 case ARM::VST2b32_UPD:
2309 case ARM::VST3q8_UPD:
2310 case ARM::VST3q16_UPD:
2311 case ARM::VST3q32_UPD:
2315 case ARM::VST4q8_UPD:
2316 case ARM::VST4q16_UPD:
2317 case ARM::VST4q32_UPD:
2318 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2319 return MCDisassembler::Fail;
2325 // Third input register
2326 switch (Inst.getOpcode()) {
2331 case ARM::VST1d8T_UPD:
2332 case ARM::VST1d16T_UPD:
2333 case ARM::VST1d32T_UPD:
2334 case ARM::VST1d64T_UPD:
2339 case ARM::VST1d8Q_UPD:
2340 case ARM::VST1d16Q_UPD:
2341 case ARM::VST1d32Q_UPD:
2342 case ARM::VST1d64Q_UPD:
2346 case ARM::VST2q8_UPD:
2347 case ARM::VST2q16_UPD:
2348 case ARM::VST2q32_UPD:
2352 case ARM::VST3d8_UPD:
2353 case ARM::VST3d16_UPD:
2354 case ARM::VST3d32_UPD:
2358 case ARM::VST4d8_UPD:
2359 case ARM::VST4d16_UPD:
2360 case ARM::VST4d32_UPD:
2361 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2362 return MCDisassembler::Fail;
2367 case ARM::VST3q8_UPD:
2368 case ARM::VST3q16_UPD:
2369 case ARM::VST3q32_UPD:
2373 case ARM::VST4q8_UPD:
2374 case ARM::VST4q16_UPD:
2375 case ARM::VST4q32_UPD:
2376 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2377 return MCDisassembler::Fail;
2383 // Fourth input register
2384 switch (Inst.getOpcode()) {
2389 case ARM::VST1d8Q_UPD:
2390 case ARM::VST1d16Q_UPD:
2391 case ARM::VST1d32Q_UPD:
2392 case ARM::VST1d64Q_UPD:
2396 case ARM::VST2q8_UPD:
2397 case ARM::VST2q16_UPD:
2398 case ARM::VST2q32_UPD:
2402 case ARM::VST4d8_UPD:
2403 case ARM::VST4d16_UPD:
2404 case ARM::VST4d32_UPD:
2405 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2406 return MCDisassembler::Fail;
2411 case ARM::VST4q8_UPD:
2412 case ARM::VST4q16_UPD:
2413 case ARM::VST4q32_UPD:
2414 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2415 return MCDisassembler::Fail;
2424 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2425 uint64_t Address, const void *Decoder) {
2426 DecodeStatus S = MCDisassembler::Success;
2428 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2429 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2430 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2431 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2432 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2433 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2434 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
2436 align *= (1 << size);
2438 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2439 return MCDisassembler::Fail;
2441 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2442 return MCDisassembler::Fail;
2445 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2446 return MCDisassembler::Fail;
2449 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2450 return MCDisassembler::Fail;
2451 Inst.addOperand(MCOperand::CreateImm(align));
2454 Inst.addOperand(MCOperand::CreateReg(0));
2455 else if (Rm != 0xF) {
2456 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2457 return MCDisassembler::Fail;
2463 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2464 uint64_t Address, const void *Decoder) {
2465 DecodeStatus S = MCDisassembler::Success;
2467 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2468 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2469 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2470 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2471 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2472 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2473 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2476 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2477 return MCDisassembler::Fail;
2478 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2479 return MCDisassembler::Fail;
2481 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2482 return MCDisassembler::Fail;
2485 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2486 return MCDisassembler::Fail;
2487 Inst.addOperand(MCOperand::CreateImm(align));
2490 Inst.addOperand(MCOperand::CreateReg(0));
2491 else if (Rm != 0xF) {
2492 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2493 return MCDisassembler::Fail;
2499 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2500 uint64_t Address, const void *Decoder) {
2501 DecodeStatus S = MCDisassembler::Success;
2503 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2504 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2505 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2506 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2507 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2509 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2510 return MCDisassembler::Fail;
2511 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2512 return MCDisassembler::Fail;
2513 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2514 return MCDisassembler::Fail;
2516 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2517 return MCDisassembler::Fail;
2520 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2521 return MCDisassembler::Fail;
2522 Inst.addOperand(MCOperand::CreateImm(0));
2525 Inst.addOperand(MCOperand::CreateReg(0));
2526 else if (Rm != 0xF) {
2527 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2528 return MCDisassembler::Fail;
2534 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2535 uint64_t Address, const void *Decoder) {
2536 DecodeStatus S = MCDisassembler::Success;
2538 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2539 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2540 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2541 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2542 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2543 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2544 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2559 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2560 return MCDisassembler::Fail;
2561 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2562 return MCDisassembler::Fail;
2563 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2564 return MCDisassembler::Fail;
2565 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2566 return MCDisassembler::Fail;
2568 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2569 return MCDisassembler::Fail;
2572 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2573 return MCDisassembler::Fail;
2574 Inst.addOperand(MCOperand::CreateImm(align));
2577 Inst.addOperand(MCOperand::CreateReg(0));
2578 else if (Rm != 0xF) {
2579 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2580 return MCDisassembler::Fail;
2587 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2588 uint64_t Address, const void *Decoder) {
2589 DecodeStatus S = MCDisassembler::Success;
2591 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2592 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2593 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2594 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2595 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2596 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2597 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2598 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2601 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2602 return MCDisassembler::Fail;
2604 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2605 return MCDisassembler::Fail;
2608 Inst.addOperand(MCOperand::CreateImm(imm));
2610 switch (Inst.getOpcode()) {
2611 case ARM::VORRiv4i16:
2612 case ARM::VORRiv2i32:
2613 case ARM::VBICiv4i16:
2614 case ARM::VBICiv2i32:
2615 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2616 return MCDisassembler::Fail;
2618 case ARM::VORRiv8i16:
2619 case ARM::VORRiv4i32:
2620 case ARM::VBICiv8i16:
2621 case ARM::VBICiv4i32:
2622 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2623 return MCDisassembler::Fail;
2632 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2633 uint64_t Address, const void *Decoder) {
2634 DecodeStatus S = MCDisassembler::Success;
2636 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2637 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2638 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2639 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2640 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2642 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2643 return MCDisassembler::Fail;
2644 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2645 return MCDisassembler::Fail;
2646 Inst.addOperand(MCOperand::CreateImm(8 << size));
2651 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2652 uint64_t Address, const void *Decoder) {
2653 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2654 return MCDisassembler::Success;
2657 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2658 uint64_t Address, const void *Decoder) {
2659 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2660 return MCDisassembler::Success;
2663 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2664 uint64_t Address, const void *Decoder) {
2665 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2666 return MCDisassembler::Success;
2669 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2670 uint64_t Address, const void *Decoder) {
2671 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2672 return MCDisassembler::Success;
2675 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2676 uint64_t Address, const void *Decoder) {
2677 DecodeStatus S = MCDisassembler::Success;
2679 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2680 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2681 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2682 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2683 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2684 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2685 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2686 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2688 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2689 return MCDisassembler::Fail;
2691 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2692 return MCDisassembler::Fail; // Writeback
2695 for (unsigned i = 0; i < length; ++i) {
2696 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)))
2697 return MCDisassembler::Fail;
2700 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2701 return MCDisassembler::Fail;
2706 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2707 uint64_t Address, const void *Decoder) {
2708 DecodeStatus S = MCDisassembler::Success;
2710 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2711 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2713 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2714 return MCDisassembler::Fail;
2716 switch(Inst.getOpcode()) {
2718 return MCDisassembler::Fail;
2720 break; // tADR does not explicitly represent the PC as an operand.
2722 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2726 Inst.addOperand(MCOperand::CreateImm(imm));
2730 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2731 uint64_t Address, const void *Decoder) {
2732 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2733 return MCDisassembler::Success;
2736 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2737 uint64_t Address, const void *Decoder) {
2738 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2739 return MCDisassembler::Success;
2742 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2743 uint64_t Address, const void *Decoder) {
2744 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2745 return MCDisassembler::Success;
2748 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2749 uint64_t Address, const void *Decoder) {
2750 DecodeStatus S = MCDisassembler::Success;
2752 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2753 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2755 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2756 return MCDisassembler::Fail;
2757 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2758 return MCDisassembler::Fail;
2763 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2764 uint64_t Address, const void *Decoder) {
2765 DecodeStatus S = MCDisassembler::Success;
2767 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2768 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2770 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2771 return MCDisassembler::Fail;
2772 Inst.addOperand(MCOperand::CreateImm(imm));
2777 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2778 uint64_t Address, const void *Decoder) {
2779 unsigned imm = Val << 2;
2781 Inst.addOperand(MCOperand::CreateImm(imm));
2782 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
2784 return MCDisassembler::Success;
2787 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2788 uint64_t Address, const void *Decoder) {
2789 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2790 Inst.addOperand(MCOperand::CreateImm(Val));
2792 return MCDisassembler::Success;
2795 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2796 uint64_t Address, const void *Decoder) {
2797 DecodeStatus S = MCDisassembler::Success;
2799 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2800 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2801 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2803 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2804 return MCDisassembler::Fail;
2805 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2806 return MCDisassembler::Fail;
2807 Inst.addOperand(MCOperand::CreateImm(imm));
2812 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2813 uint64_t Address, const void *Decoder) {
2814 DecodeStatus S = MCDisassembler::Success;
2816 switch (Inst.getOpcode()) {
2822 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2823 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2824 return MCDisassembler::Fail;
2828 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2830 switch (Inst.getOpcode()) {
2832 Inst.setOpcode(ARM::t2LDRBpci);
2835 Inst.setOpcode(ARM::t2LDRHpci);
2838 Inst.setOpcode(ARM::t2LDRSHpci);
2841 Inst.setOpcode(ARM::t2LDRSBpci);
2844 Inst.setOpcode(ARM::t2PLDi12);
2845 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2848 return MCDisassembler::Fail;
2851 int imm = fieldFromInstruction32(Insn, 0, 12);
2852 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2853 Inst.addOperand(MCOperand::CreateImm(imm));
2858 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2859 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2860 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2861 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2862 return MCDisassembler::Fail;
2867 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2868 uint64_t Address, const void *Decoder) {
2869 int imm = Val & 0xFF;
2870 if (!(Val & 0x100)) imm *= -1;
2871 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2873 return MCDisassembler::Success;
2876 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2877 uint64_t Address, const void *Decoder) {
2878 DecodeStatus S = MCDisassembler::Success;
2880 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2881 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2883 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2884 return MCDisassembler::Fail;
2885 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2886 return MCDisassembler::Fail;
2891 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
2892 uint64_t Address, const void *Decoder) {
2893 DecodeStatus S = MCDisassembler::Success;
2895 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
2896 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2898 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2899 return MCDisassembler::Fail;
2901 Inst.addOperand(MCOperand::CreateImm(imm));
2906 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2907 uint64_t Address, const void *Decoder) {
2908 int imm = Val & 0xFF;
2911 else if (!(Val & 0x100))
2913 Inst.addOperand(MCOperand::CreateImm(imm));
2915 return MCDisassembler::Success;
2919 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2920 uint64_t Address, const void *Decoder) {
2921 DecodeStatus S = MCDisassembler::Success;
2923 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2924 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2926 // Some instructions always use an additive offset.
2927 switch (Inst.getOpcode()) {
2942 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2943 return MCDisassembler::Fail;
2944 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2945 return MCDisassembler::Fail;
2950 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn,
2951 uint64_t Address, const void *Decoder) {
2952 DecodeStatus S = MCDisassembler::Success;
2954 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2955 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2956 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
2957 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
2959 unsigned load = fieldFromInstruction32(Insn, 20, 1);
2962 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2963 return MCDisassembler::Fail;
2966 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2967 return MCDisassembler::Fail;
2970 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2971 return MCDisassembler::Fail;
2974 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
2975 return MCDisassembler::Fail;
2980 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2981 uint64_t Address, const void *Decoder) {
2982 DecodeStatus S = MCDisassembler::Success;
2984 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2985 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2987 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2988 return MCDisassembler::Fail;
2989 Inst.addOperand(MCOperand::CreateImm(imm));
2995 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2996 uint64_t Address, const void *Decoder) {
2997 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2999 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3000 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3001 Inst.addOperand(MCOperand::CreateImm(imm));
3003 return MCDisassembler::Success;
3006 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
3007 uint64_t Address, const void *Decoder) {
3008 DecodeStatus S = MCDisassembler::Success;
3010 if (Inst.getOpcode() == ARM::tADDrSP) {
3011 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
3012 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
3014 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3015 return MCDisassembler::Fail;
3016 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3017 return MCDisassembler::Fail;
3018 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3019 } else if (Inst.getOpcode() == ARM::tADDspr) {
3020 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
3022 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3023 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3024 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3025 return MCDisassembler::Fail;
3031 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
3032 uint64_t Address, const void *Decoder) {
3033 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
3034 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
3036 Inst.addOperand(MCOperand::CreateImm(imod));
3037 Inst.addOperand(MCOperand::CreateImm(flags));
3039 return MCDisassembler::Success;
3042 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
3043 uint64_t Address, const void *Decoder) {
3044 DecodeStatus S = MCDisassembler::Success;
3045 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3046 unsigned add = fieldFromInstruction32(Insn, 4, 1);
3048 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3049 return MCDisassembler::Fail;
3050 Inst.addOperand(MCOperand::CreateImm(add));
3055 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
3056 uint64_t Address, const void *Decoder) {
3057 if (!tryAddingSymbolicOperand(Address,
3058 (Address & ~2u) + SignExtend32<22>(Val << 1) + 4,
3059 true, 4, Inst, Decoder))
3060 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3061 return MCDisassembler::Success;
3064 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
3065 uint64_t Address, const void *Decoder) {
3066 if (Val == 0xA || Val == 0xB)
3067 return MCDisassembler::Fail;
3069 Inst.addOperand(MCOperand::CreateImm(Val));
3070 return MCDisassembler::Success;
3074 DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Insn,
3075 uint64_t Address, const void *Decoder) {
3076 DecodeStatus S = MCDisassembler::Success;
3078 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3079 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3081 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3082 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3083 return MCDisassembler::Fail;
3084 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3085 return MCDisassembler::Fail;
3090 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
3091 uint64_t Address, const void *Decoder) {
3092 DecodeStatus S = MCDisassembler::Success;
3094 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
3095 if (pred == 0xE || pred == 0xF) {
3096 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
3099 return MCDisassembler::Fail;
3101 Inst.setOpcode(ARM::t2DSB);
3104 Inst.setOpcode(ARM::t2DMB);
3107 Inst.setOpcode(ARM::t2ISB);
3111 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
3112 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3115 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
3116 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
3117 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
3118 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
3119 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
3121 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3122 return MCDisassembler::Fail;
3123 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3124 return MCDisassembler::Fail;
3129 // Decode a shifted immediate operand. These basically consist
3130 // of an 8-bit value, and a 4-bit directive that specifies either
3131 // a splat operation or a rotation.
3132 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
3133 uint64_t Address, const void *Decoder) {
3134 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
3136 unsigned byte = fieldFromInstruction32(Val, 8, 2);
3137 unsigned imm = fieldFromInstruction32(Val, 0, 8);
3140 Inst.addOperand(MCOperand::CreateImm(imm));
3143 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3146 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3149 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3154 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
3155 unsigned rot = fieldFromInstruction32(Val, 7, 5);
3156 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3157 Inst.addOperand(MCOperand::CreateImm(imm));
3160 return MCDisassembler::Success;
3164 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
3165 uint64_t Address, const void *Decoder){
3166 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3167 return MCDisassembler::Success;
3170 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
3171 uint64_t Address, const void *Decoder){
3172 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3173 return MCDisassembler::Success;
3176 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
3177 uint64_t Address, const void *Decoder) {
3180 return MCDisassembler::Fail;
3192 Inst.addOperand(MCOperand::CreateImm(Val));
3193 return MCDisassembler::Success;
3196 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
3197 uint64_t Address, const void *Decoder) {
3198 if (!Val) return MCDisassembler::Fail;
3199 Inst.addOperand(MCOperand::CreateImm(Val));
3200 return MCDisassembler::Success;
3203 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
3204 uint64_t Address, const void *Decoder) {
3205 DecodeStatus S = MCDisassembler::Success;
3207 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3208 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3209 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3211 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3213 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3214 return MCDisassembler::Fail;
3215 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3216 return MCDisassembler::Fail;
3217 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3218 return MCDisassembler::Fail;
3219 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3220 return MCDisassembler::Fail;
3226 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
3227 uint64_t Address, const void *Decoder){
3228 DecodeStatus S = MCDisassembler::Success;
3230 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3231 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3232 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3233 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3235 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3236 return MCDisassembler::Fail;
3238 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3239 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3241 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3242 return MCDisassembler::Fail;
3243 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3244 return MCDisassembler::Fail;
3245 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3246 return MCDisassembler::Fail;
3247 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3248 return MCDisassembler::Fail;
3253 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
3254 uint64_t Address, const void *Decoder) {
3255 DecodeStatus S = MCDisassembler::Success;
3257 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3258 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3259 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3260 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3261 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3262 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3264 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3266 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3267 return MCDisassembler::Fail;
3268 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3269 return MCDisassembler::Fail;
3270 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3271 return MCDisassembler::Fail;
3272 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3273 return MCDisassembler::Fail;
3278 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
3279 uint64_t Address, const void *Decoder) {
3280 DecodeStatus S = MCDisassembler::Success;
3282 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3283 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3284 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3285 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3286 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3287 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3288 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3290 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3291 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3293 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3294 return MCDisassembler::Fail;
3295 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3296 return MCDisassembler::Fail;
3297 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3298 return MCDisassembler::Fail;
3299 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3300 return MCDisassembler::Fail;
3306 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3307 uint64_t Address, const void *Decoder) {
3308 DecodeStatus S = MCDisassembler::Success;
3310 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3311 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3312 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3313 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3314 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3315 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3317 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3319 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3320 return MCDisassembler::Fail;
3321 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3322 return MCDisassembler::Fail;
3323 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3324 return MCDisassembler::Fail;
3325 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3326 return MCDisassembler::Fail;
3331 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3332 uint64_t Address, const void *Decoder) {
3333 DecodeStatus S = MCDisassembler::Success;
3335 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3336 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3337 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3338 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3339 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3340 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3342 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3344 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3345 return MCDisassembler::Fail;
3346 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3347 return MCDisassembler::Fail;
3348 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3349 return MCDisassembler::Fail;
3350 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3351 return MCDisassembler::Fail;
3356 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3357 uint64_t Address, const void *Decoder) {
3358 DecodeStatus S = MCDisassembler::Success;
3360 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3361 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3362 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3363 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3364 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3370 return MCDisassembler::Fail;
3372 if (fieldFromInstruction32(Insn, 4, 1))
3373 return MCDisassembler::Fail; // UNDEFINED
3374 index = fieldFromInstruction32(Insn, 5, 3);
3377 if (fieldFromInstruction32(Insn, 5, 1))
3378 return MCDisassembler::Fail; // UNDEFINED
3379 index = fieldFromInstruction32(Insn, 6, 2);
3380 if (fieldFromInstruction32(Insn, 4, 1))
3384 if (fieldFromInstruction32(Insn, 6, 1))
3385 return MCDisassembler::Fail; // UNDEFINED
3386 index = fieldFromInstruction32(Insn, 7, 1);
3387 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3391 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3392 return MCDisassembler::Fail;
3393 if (Rm != 0xF) { // Writeback
3394 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3395 return MCDisassembler::Fail;
3397 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3398 return MCDisassembler::Fail;
3399 Inst.addOperand(MCOperand::CreateImm(align));
3402 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3403 return MCDisassembler::Fail;
3405 Inst.addOperand(MCOperand::CreateReg(0));
3408 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3409 return MCDisassembler::Fail;
3410 Inst.addOperand(MCOperand::CreateImm(index));
3415 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3416 uint64_t Address, const void *Decoder) {
3417 DecodeStatus S = MCDisassembler::Success;
3419 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3420 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3421 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3422 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3423 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3429 return MCDisassembler::Fail;
3431 if (fieldFromInstruction32(Insn, 4, 1))
3432 return MCDisassembler::Fail; // UNDEFINED
3433 index = fieldFromInstruction32(Insn, 5, 3);
3436 if (fieldFromInstruction32(Insn, 5, 1))
3437 return MCDisassembler::Fail; // UNDEFINED
3438 index = fieldFromInstruction32(Insn, 6, 2);
3439 if (fieldFromInstruction32(Insn, 4, 1))
3443 if (fieldFromInstruction32(Insn, 6, 1))
3444 return MCDisassembler::Fail; // UNDEFINED
3445 index = fieldFromInstruction32(Insn, 7, 1);
3446 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3450 if (Rm != 0xF) { // Writeback
3451 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3452 return MCDisassembler::Fail;
3454 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3455 return MCDisassembler::Fail;
3456 Inst.addOperand(MCOperand::CreateImm(align));
3459 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3460 return MCDisassembler::Fail;
3462 Inst.addOperand(MCOperand::CreateReg(0));
3465 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3466 return MCDisassembler::Fail;
3467 Inst.addOperand(MCOperand::CreateImm(index));
3473 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3474 uint64_t Address, const void *Decoder) {
3475 DecodeStatus S = MCDisassembler::Success;
3477 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3478 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3479 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3480 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3481 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3488 return MCDisassembler::Fail;
3490 index = fieldFromInstruction32(Insn, 5, 3);
3491 if (fieldFromInstruction32(Insn, 4, 1))
3495 index = fieldFromInstruction32(Insn, 6, 2);
3496 if (fieldFromInstruction32(Insn, 4, 1))
3498 if (fieldFromInstruction32(Insn, 5, 1))
3502 if (fieldFromInstruction32(Insn, 5, 1))
3503 return MCDisassembler::Fail; // UNDEFINED
3504 index = fieldFromInstruction32(Insn, 7, 1);
3505 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3507 if (fieldFromInstruction32(Insn, 6, 1))
3512 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3513 return MCDisassembler::Fail;
3514 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3515 return MCDisassembler::Fail;
3516 if (Rm != 0xF) { // Writeback
3517 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3518 return MCDisassembler::Fail;
3520 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3521 return MCDisassembler::Fail;
3522 Inst.addOperand(MCOperand::CreateImm(align));
3525 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3526 return MCDisassembler::Fail;
3528 Inst.addOperand(MCOperand::CreateReg(0));
3531 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3532 return MCDisassembler::Fail;
3533 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3534 return MCDisassembler::Fail;
3535 Inst.addOperand(MCOperand::CreateImm(index));
3540 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3541 uint64_t Address, const void *Decoder) {
3542 DecodeStatus S = MCDisassembler::Success;
3544 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3545 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3546 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3547 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3548 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3555 return MCDisassembler::Fail;
3557 index = fieldFromInstruction32(Insn, 5, 3);
3558 if (fieldFromInstruction32(Insn, 4, 1))
3562 index = fieldFromInstruction32(Insn, 6, 2);
3563 if (fieldFromInstruction32(Insn, 4, 1))
3565 if (fieldFromInstruction32(Insn, 5, 1))
3569 if (fieldFromInstruction32(Insn, 5, 1))
3570 return MCDisassembler::Fail; // UNDEFINED
3571 index = fieldFromInstruction32(Insn, 7, 1);
3572 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3574 if (fieldFromInstruction32(Insn, 6, 1))
3579 if (Rm != 0xF) { // Writeback
3580 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3581 return MCDisassembler::Fail;
3583 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3584 return MCDisassembler::Fail;
3585 Inst.addOperand(MCOperand::CreateImm(align));
3588 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3589 return MCDisassembler::Fail;
3591 Inst.addOperand(MCOperand::CreateReg(0));
3594 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3595 return MCDisassembler::Fail;
3596 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3597 return MCDisassembler::Fail;
3598 Inst.addOperand(MCOperand::CreateImm(index));
3604 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3605 uint64_t Address, const void *Decoder) {
3606 DecodeStatus S = MCDisassembler::Success;
3608 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3609 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3610 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3611 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3612 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3619 return MCDisassembler::Fail;
3621 if (fieldFromInstruction32(Insn, 4, 1))
3622 return MCDisassembler::Fail; // UNDEFINED
3623 index = fieldFromInstruction32(Insn, 5, 3);
3626 if (fieldFromInstruction32(Insn, 4, 1))
3627 return MCDisassembler::Fail; // UNDEFINED
3628 index = fieldFromInstruction32(Insn, 6, 2);
3629 if (fieldFromInstruction32(Insn, 5, 1))
3633 if (fieldFromInstruction32(Insn, 4, 2))
3634 return MCDisassembler::Fail; // UNDEFINED
3635 index = fieldFromInstruction32(Insn, 7, 1);
3636 if (fieldFromInstruction32(Insn, 6, 1))
3641 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3642 return MCDisassembler::Fail;
3643 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3644 return MCDisassembler::Fail;
3645 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3646 return MCDisassembler::Fail;
3648 if (Rm != 0xF) { // Writeback
3649 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3650 return MCDisassembler::Fail;
3652 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3653 return MCDisassembler::Fail;
3654 Inst.addOperand(MCOperand::CreateImm(align));
3657 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3658 return MCDisassembler::Fail;
3660 Inst.addOperand(MCOperand::CreateReg(0));
3663 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3664 return MCDisassembler::Fail;
3665 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3666 return MCDisassembler::Fail;
3667 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3668 return MCDisassembler::Fail;
3669 Inst.addOperand(MCOperand::CreateImm(index));
3674 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3675 uint64_t Address, const void *Decoder) {
3676 DecodeStatus S = MCDisassembler::Success;
3678 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3679 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3680 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3681 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3682 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3689 return MCDisassembler::Fail;
3691 if (fieldFromInstruction32(Insn, 4, 1))
3692 return MCDisassembler::Fail; // UNDEFINED
3693 index = fieldFromInstruction32(Insn, 5, 3);
3696 if (fieldFromInstruction32(Insn, 4, 1))
3697 return MCDisassembler::Fail; // UNDEFINED
3698 index = fieldFromInstruction32(Insn, 6, 2);
3699 if (fieldFromInstruction32(Insn, 5, 1))
3703 if (fieldFromInstruction32(Insn, 4, 2))
3704 return MCDisassembler::Fail; // UNDEFINED
3705 index = fieldFromInstruction32(Insn, 7, 1);
3706 if (fieldFromInstruction32(Insn, 6, 1))
3711 if (Rm != 0xF) { // Writeback
3712 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3713 return MCDisassembler::Fail;
3715 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3716 return MCDisassembler::Fail;
3717 Inst.addOperand(MCOperand::CreateImm(align));
3720 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3721 return MCDisassembler::Fail;
3723 Inst.addOperand(MCOperand::CreateReg(0));
3726 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3727 return MCDisassembler::Fail;
3728 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3729 return MCDisassembler::Fail;
3730 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3731 return MCDisassembler::Fail;
3732 Inst.addOperand(MCOperand::CreateImm(index));
3738 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3739 uint64_t Address, const void *Decoder) {
3740 DecodeStatus S = MCDisassembler::Success;
3742 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3743 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3744 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3745 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3746 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3753 return MCDisassembler::Fail;
3755 if (fieldFromInstruction32(Insn, 4, 1))
3757 index = fieldFromInstruction32(Insn, 5, 3);
3760 if (fieldFromInstruction32(Insn, 4, 1))
3762 index = fieldFromInstruction32(Insn, 6, 2);
3763 if (fieldFromInstruction32(Insn, 5, 1))
3767 if (fieldFromInstruction32(Insn, 4, 2))
3768 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3769 index = fieldFromInstruction32(Insn, 7, 1);
3770 if (fieldFromInstruction32(Insn, 6, 1))
3775 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3776 return MCDisassembler::Fail;
3777 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3778 return MCDisassembler::Fail;
3779 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3780 return MCDisassembler::Fail;
3781 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3782 return MCDisassembler::Fail;
3784 if (Rm != 0xF) { // Writeback
3785 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3786 return MCDisassembler::Fail;
3788 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3789 return MCDisassembler::Fail;
3790 Inst.addOperand(MCOperand::CreateImm(align));
3793 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3794 return MCDisassembler::Fail;
3796 Inst.addOperand(MCOperand::CreateReg(0));
3799 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3800 return MCDisassembler::Fail;
3801 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3802 return MCDisassembler::Fail;
3803 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3804 return MCDisassembler::Fail;
3805 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3806 return MCDisassembler::Fail;
3807 Inst.addOperand(MCOperand::CreateImm(index));
3812 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3813 uint64_t Address, const void *Decoder) {
3814 DecodeStatus S = MCDisassembler::Success;
3816 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3817 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3818 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3819 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3820 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3827 return MCDisassembler::Fail;
3829 if (fieldFromInstruction32(Insn, 4, 1))
3831 index = fieldFromInstruction32(Insn, 5, 3);
3834 if (fieldFromInstruction32(Insn, 4, 1))
3836 index = fieldFromInstruction32(Insn, 6, 2);
3837 if (fieldFromInstruction32(Insn, 5, 1))
3841 if (fieldFromInstruction32(Insn, 4, 2))
3842 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3843 index = fieldFromInstruction32(Insn, 7, 1);
3844 if (fieldFromInstruction32(Insn, 6, 1))
3849 if (Rm != 0xF) { // Writeback
3850 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3851 return MCDisassembler::Fail;
3853 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3854 return MCDisassembler::Fail;
3855 Inst.addOperand(MCOperand::CreateImm(align));
3858 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3859 return MCDisassembler::Fail;
3861 Inst.addOperand(MCOperand::CreateReg(0));
3864 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3865 return MCDisassembler::Fail;
3866 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3867 return MCDisassembler::Fail;
3868 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3869 return MCDisassembler::Fail;
3870 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3871 return MCDisassembler::Fail;
3872 Inst.addOperand(MCOperand::CreateImm(index));
3877 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
3878 uint64_t Address, const void *Decoder) {
3879 DecodeStatus S = MCDisassembler::Success;
3880 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3881 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3882 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3883 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3884 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3886 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3887 S = MCDisassembler::SoftFail;
3889 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3890 return MCDisassembler::Fail;
3891 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3892 return MCDisassembler::Fail;
3893 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3894 return MCDisassembler::Fail;
3895 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3896 return MCDisassembler::Fail;
3897 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3898 return MCDisassembler::Fail;
3903 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3904 uint64_t Address, const void *Decoder) {
3905 DecodeStatus S = MCDisassembler::Success;
3906 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3907 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3908 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3909 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3910 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3912 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3913 S = MCDisassembler::SoftFail;
3915 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3916 return MCDisassembler::Fail;
3917 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3918 return MCDisassembler::Fail;
3919 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3920 return MCDisassembler::Fail;
3921 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3922 return MCDisassembler::Fail;
3923 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3924 return MCDisassembler::Fail;
3929 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3930 uint64_t Address, const void *Decoder) {
3931 DecodeStatus S = MCDisassembler::Success;
3932 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3933 // The InstPrinter needs to have the low bit of the predicate in
3934 // the mask operand to be able to print it properly.
3935 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3939 S = MCDisassembler::SoftFail;
3942 if ((mask & 0xF) == 0) {
3943 // Preserve the high bit of the mask, which is the low bit of
3947 S = MCDisassembler::SoftFail;
3950 Inst.addOperand(MCOperand::CreateImm(pred));
3951 Inst.addOperand(MCOperand::CreateImm(mask));
3956 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3957 uint64_t Address, const void *Decoder) {
3958 DecodeStatus S = MCDisassembler::Success;
3960 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3961 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3962 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3963 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3964 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3965 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3966 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3967 bool writeback = (W == 1) | (P == 0);
3969 addr |= (U << 8) | (Rn << 9);
3971 if (writeback && (Rn == Rt || Rn == Rt2))
3972 Check(S, MCDisassembler::SoftFail);
3974 Check(S, MCDisassembler::SoftFail);
3977 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3978 return MCDisassembler::Fail;
3980 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3981 return MCDisassembler::Fail;
3982 // Writeback operand
3983 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3984 return MCDisassembler::Fail;
3986 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3987 return MCDisassembler::Fail;
3993 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3994 uint64_t Address, const void *Decoder) {
3995 DecodeStatus S = MCDisassembler::Success;
3997 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3998 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3999 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4000 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
4001 unsigned W = fieldFromInstruction32(Insn, 21, 1);
4002 unsigned U = fieldFromInstruction32(Insn, 23, 1);
4003 unsigned P = fieldFromInstruction32(Insn, 24, 1);
4004 bool writeback = (W == 1) | (P == 0);
4006 addr |= (U << 8) | (Rn << 9);
4008 if (writeback && (Rn == Rt || Rn == Rt2))
4009 Check(S, MCDisassembler::SoftFail);
4011 // Writeback operand
4012 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4013 return MCDisassembler::Fail;
4015 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4016 return MCDisassembler::Fail;
4018 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4019 return MCDisassembler::Fail;
4021 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4022 return MCDisassembler::Fail;
4027 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn,
4028 uint64_t Address, const void *Decoder) {
4029 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
4030 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
4031 if (sign1 != sign2) return MCDisassembler::Fail;
4033 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
4034 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
4035 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
4037 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4039 return MCDisassembler::Success;
4042 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, uint32_t Val,
4044 const void *Decoder) {
4045 DecodeStatus S = MCDisassembler::Success;
4047 // Shift of "asr #32" is not allowed in Thumb2 mode.
4048 if (Val == 0x20) S = MCDisassembler::SoftFail;
4049 Inst.addOperand(MCOperand::CreateImm(Val));