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::t2LDC2_OFFSET:
1248 case ARM::t2LDC2L_OFFSET:
1249 case ARM::t2LDC2_PRE:
1250 case ARM::t2LDC2L_PRE:
1251 case ARM::t2LDC2_POST:
1252 case ARM::t2LDC2L_POST:
1253 case ARM::t2STC2_OFFSET:
1254 case ARM::t2STC2L_OFFSET:
1255 case ARM::t2STC2_PRE:
1256 case ARM::t2STC2L_PRE:
1257 case ARM::t2STC2_POST:
1258 case ARM::t2STC2L_POST:
1259 case ARM::LDC2_OFFSET:
1260 case ARM::LDC2L_OFFSET:
1262 case ARM::LDC2L_PRE:
1263 case ARM::LDC2_POST:
1264 case ARM::LDC2L_POST:
1265 case ARM::STC2_OFFSET:
1266 case ARM::STC2L_OFFSET:
1268 case ARM::STC2L_PRE:
1269 case ARM::STC2_POST:
1270 case ARM::STC2L_POST:
1271 case ARM::t2LDC_OFFSET:
1272 case ARM::t2LDCL_OFFSET:
1273 case ARM::t2LDC_PRE:
1274 case ARM::t2LDCL_PRE:
1275 case ARM::t2LDC_POST:
1276 case ARM::t2LDCL_POST:
1277 case ARM::t2STC_OFFSET:
1278 case ARM::t2STCL_OFFSET:
1279 case ARM::t2STC_PRE:
1280 case ARM::t2STCL_PRE:
1281 case ARM::t2STC_POST:
1282 case ARM::t2STCL_POST:
1283 case ARM::LDC_OFFSET:
1284 case ARM::LDCL_OFFSET:
1288 case ARM::LDCL_POST:
1289 case ARM::STC_OFFSET:
1290 case ARM::STCL_OFFSET:
1294 case ARM::STCL_POST:
1298 // The 'option' variant doesn't encode 'U' in the immediate since
1299 // the immediate is unsigned [0,255].
1300 Inst.addOperand(MCOperand::CreateImm(imm));
1304 switch (Inst.getOpcode()) {
1305 case ARM::LDC_OFFSET:
1308 case ARM::LDC_OPTION:
1309 case ARM::LDCL_OFFSET:
1311 case ARM::LDCL_POST:
1312 case ARM::LDCL_OPTION:
1313 case ARM::STC_OFFSET:
1316 case ARM::STC_OPTION:
1317 case ARM::STCL_OFFSET:
1319 case ARM::STCL_POST:
1320 case ARM::STCL_OPTION:
1321 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1322 return MCDisassembler::Fail;
1332 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1333 uint64_t Address, const void *Decoder) {
1334 DecodeStatus S = MCDisassembler::Success;
1336 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1337 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1338 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1339 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1340 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1341 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1342 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1343 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1345 // On stores, the writeback operand precedes Rt.
1346 switch (Inst.getOpcode()) {
1347 case ARM::STR_POST_IMM:
1348 case ARM::STR_POST_REG:
1349 case ARM::STRB_POST_IMM:
1350 case ARM::STRB_POST_REG:
1351 case ARM::STRT_POST_REG:
1352 case ARM::STRT_POST_IMM:
1353 case ARM::STRBT_POST_REG:
1354 case ARM::STRBT_POST_IMM:
1355 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1356 return MCDisassembler::Fail;
1362 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1363 return MCDisassembler::Fail;
1365 // On loads, the writeback operand comes after Rt.
1366 switch (Inst.getOpcode()) {
1367 case ARM::LDR_POST_IMM:
1368 case ARM::LDR_POST_REG:
1369 case ARM::LDRB_POST_IMM:
1370 case ARM::LDRB_POST_REG:
1371 case ARM::LDRBT_POST_REG:
1372 case ARM::LDRBT_POST_IMM:
1373 case ARM::LDRT_POST_REG:
1374 case ARM::LDRT_POST_IMM:
1375 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1376 return MCDisassembler::Fail;
1382 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1383 return MCDisassembler::Fail;
1385 ARM_AM::AddrOpc Op = ARM_AM::add;
1386 if (!fieldFromInstruction32(Insn, 23, 1))
1389 bool writeback = (P == 0) || (W == 1);
1390 unsigned idx_mode = 0;
1392 idx_mode = ARMII::IndexModePre;
1393 else if (!P && writeback)
1394 idx_mode = ARMII::IndexModePost;
1396 if (writeback && (Rn == 15 || Rn == Rt))
1397 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1400 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1401 return MCDisassembler::Fail;
1402 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1403 switch( fieldFromInstruction32(Insn, 5, 2)) {
1417 return MCDisassembler::Fail;
1419 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1420 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1422 Inst.addOperand(MCOperand::CreateImm(imm));
1424 Inst.addOperand(MCOperand::CreateReg(0));
1425 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1426 Inst.addOperand(MCOperand::CreateImm(tmp));
1429 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1430 return MCDisassembler::Fail;
1435 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1436 uint64_t Address, const void *Decoder) {
1437 DecodeStatus S = MCDisassembler::Success;
1439 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1440 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1441 unsigned type = fieldFromInstruction32(Val, 5, 2);
1442 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1443 unsigned U = fieldFromInstruction32(Val, 12, 1);
1445 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1461 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1462 return MCDisassembler::Fail;
1463 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1464 return MCDisassembler::Fail;
1467 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1469 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1470 Inst.addOperand(MCOperand::CreateImm(shift));
1476 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1477 uint64_t Address, const void *Decoder) {
1478 DecodeStatus S = MCDisassembler::Success;
1480 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1481 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1482 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1483 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1484 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1485 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1486 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1487 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1488 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1490 bool writeback = (W == 1) | (P == 0);
1492 // For {LD,ST}RD, Rt must be even, else undefined.
1493 switch (Inst.getOpcode()) {
1496 case ARM::STRD_POST:
1499 case ARM::LDRD_POST:
1500 if (Rt & 0x1) return MCDisassembler::Fail;
1506 if (writeback) { // Writeback
1508 U |= ARMII::IndexModePre << 9;
1510 U |= ARMII::IndexModePost << 9;
1512 // On stores, the writeback operand precedes Rt.
1513 switch (Inst.getOpcode()) {
1516 case ARM::STRD_POST:
1519 case ARM::STRH_POST:
1520 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1521 return MCDisassembler::Fail;
1528 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1529 return MCDisassembler::Fail;
1530 switch (Inst.getOpcode()) {
1533 case ARM::STRD_POST:
1536 case ARM::LDRD_POST:
1537 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1538 return MCDisassembler::Fail;
1545 // On loads, the writeback operand comes after Rt.
1546 switch (Inst.getOpcode()) {
1549 case ARM::LDRD_POST:
1552 case ARM::LDRH_POST:
1554 case ARM::LDRSH_PRE:
1555 case ARM::LDRSH_POST:
1557 case ARM::LDRSB_PRE:
1558 case ARM::LDRSB_POST:
1561 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1562 return MCDisassembler::Fail;
1569 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1570 return MCDisassembler::Fail;
1573 Inst.addOperand(MCOperand::CreateReg(0));
1574 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1576 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1577 return MCDisassembler::Fail;
1578 Inst.addOperand(MCOperand::CreateImm(U));
1581 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1582 return MCDisassembler::Fail;
1587 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1588 uint64_t Address, const void *Decoder) {
1589 DecodeStatus S = MCDisassembler::Success;
1591 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1592 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1609 Inst.addOperand(MCOperand::CreateImm(mode));
1610 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1611 return MCDisassembler::Fail;
1616 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1618 uint64_t Address, const void *Decoder) {
1619 DecodeStatus S = MCDisassembler::Success;
1621 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1622 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1623 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1626 switch (Inst.getOpcode()) {
1628 Inst.setOpcode(ARM::RFEDA);
1630 case ARM::LDMDA_UPD:
1631 Inst.setOpcode(ARM::RFEDA_UPD);
1634 Inst.setOpcode(ARM::RFEDB);
1636 case ARM::LDMDB_UPD:
1637 Inst.setOpcode(ARM::RFEDB_UPD);
1640 Inst.setOpcode(ARM::RFEIA);
1642 case ARM::LDMIA_UPD:
1643 Inst.setOpcode(ARM::RFEIA_UPD);
1646 Inst.setOpcode(ARM::RFEIB);
1648 case ARM::LDMIB_UPD:
1649 Inst.setOpcode(ARM::RFEIB_UPD);
1652 Inst.setOpcode(ARM::SRSDA);
1654 case ARM::STMDA_UPD:
1655 Inst.setOpcode(ARM::SRSDA_UPD);
1658 Inst.setOpcode(ARM::SRSDB);
1660 case ARM::STMDB_UPD:
1661 Inst.setOpcode(ARM::SRSDB_UPD);
1664 Inst.setOpcode(ARM::SRSIA);
1666 case ARM::STMIA_UPD:
1667 Inst.setOpcode(ARM::SRSIA_UPD);
1670 Inst.setOpcode(ARM::SRSIB);
1672 case ARM::STMIB_UPD:
1673 Inst.setOpcode(ARM::SRSIB_UPD);
1676 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1679 // For stores (which become SRS's, the only operand is the mode.
1680 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1682 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1686 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1689 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1690 return MCDisassembler::Fail;
1691 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1692 return MCDisassembler::Fail; // Tied
1693 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1694 return MCDisassembler::Fail;
1695 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1696 return MCDisassembler::Fail;
1701 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1702 uint64_t Address, const void *Decoder) {
1703 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1704 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1705 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1706 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1708 DecodeStatus S = MCDisassembler::Success;
1710 // imod == '01' --> UNPREDICTABLE
1711 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1712 // return failure here. The '01' imod value is unprintable, so there's
1713 // nothing useful we could do even if we returned UNPREDICTABLE.
1715 if (imod == 1) return MCDisassembler::Fail;
1718 Inst.setOpcode(ARM::CPS3p);
1719 Inst.addOperand(MCOperand::CreateImm(imod));
1720 Inst.addOperand(MCOperand::CreateImm(iflags));
1721 Inst.addOperand(MCOperand::CreateImm(mode));
1722 } else if (imod && !M) {
1723 Inst.setOpcode(ARM::CPS2p);
1724 Inst.addOperand(MCOperand::CreateImm(imod));
1725 Inst.addOperand(MCOperand::CreateImm(iflags));
1726 if (mode) S = MCDisassembler::SoftFail;
1727 } else if (!imod && M) {
1728 Inst.setOpcode(ARM::CPS1p);
1729 Inst.addOperand(MCOperand::CreateImm(mode));
1730 if (iflags) S = MCDisassembler::SoftFail;
1732 // imod == '00' && M == '0' --> UNPREDICTABLE
1733 Inst.setOpcode(ARM::CPS1p);
1734 Inst.addOperand(MCOperand::CreateImm(mode));
1735 S = MCDisassembler::SoftFail;
1741 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1742 uint64_t Address, const void *Decoder) {
1743 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1744 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1745 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1746 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1748 DecodeStatus S = MCDisassembler::Success;
1750 // imod == '01' --> UNPREDICTABLE
1751 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1752 // return failure here. The '01' imod value is unprintable, so there's
1753 // nothing useful we could do even if we returned UNPREDICTABLE.
1755 if (imod == 1) return MCDisassembler::Fail;
1758 Inst.setOpcode(ARM::t2CPS3p);
1759 Inst.addOperand(MCOperand::CreateImm(imod));
1760 Inst.addOperand(MCOperand::CreateImm(iflags));
1761 Inst.addOperand(MCOperand::CreateImm(mode));
1762 } else if (imod && !M) {
1763 Inst.setOpcode(ARM::t2CPS2p);
1764 Inst.addOperand(MCOperand::CreateImm(imod));
1765 Inst.addOperand(MCOperand::CreateImm(iflags));
1766 if (mode) S = MCDisassembler::SoftFail;
1767 } else if (!imod && M) {
1768 Inst.setOpcode(ARM::t2CPS1p);
1769 Inst.addOperand(MCOperand::CreateImm(mode));
1770 if (iflags) S = MCDisassembler::SoftFail;
1772 // imod == '00' && M == '0' --> UNPREDICTABLE
1773 Inst.setOpcode(ARM::t2CPS1p);
1774 Inst.addOperand(MCOperand::CreateImm(mode));
1775 S = MCDisassembler::SoftFail;
1781 static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1782 uint64_t Address, const void *Decoder) {
1783 DecodeStatus S = MCDisassembler::Success;
1785 unsigned Rd = fieldFromInstruction32(Insn, 8, 4);
1788 imm |= (fieldFromInstruction32(Insn, 0, 8) << 0);
1789 imm |= (fieldFromInstruction32(Insn, 12, 3) << 8);
1790 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1791 imm |= (fieldFromInstruction32(Insn, 26, 1) << 11);
1793 if (Inst.getOpcode() == ARM::t2MOVTi16)
1794 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1795 return MCDisassembler::Fail;
1796 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1797 return MCDisassembler::Fail;
1799 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1800 Inst.addOperand(MCOperand::CreateImm(imm));
1805 static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
1806 uint64_t Address, const void *Decoder) {
1807 DecodeStatus S = MCDisassembler::Success;
1809 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1810 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1813 imm |= (fieldFromInstruction32(Insn, 0, 12) << 0);
1814 imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
1816 if (Inst.getOpcode() == ARM::MOVTi16)
1817 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1818 return MCDisassembler::Fail;
1819 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1820 return MCDisassembler::Fail;
1822 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1823 Inst.addOperand(MCOperand::CreateImm(imm));
1825 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1826 return MCDisassembler::Fail;
1831 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1832 uint64_t Address, const void *Decoder) {
1833 DecodeStatus S = MCDisassembler::Success;
1835 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1836 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1837 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1838 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1839 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1842 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1844 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1845 return MCDisassembler::Fail;
1846 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1847 return MCDisassembler::Fail;
1848 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1849 return MCDisassembler::Fail;
1850 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1851 return MCDisassembler::Fail;
1853 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1854 return MCDisassembler::Fail;
1859 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1860 uint64_t Address, const void *Decoder) {
1861 DecodeStatus S = MCDisassembler::Success;
1863 unsigned add = fieldFromInstruction32(Val, 12, 1);
1864 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1865 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1867 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1868 return MCDisassembler::Fail;
1870 if (!add) imm *= -1;
1871 if (imm == 0 && !add) imm = INT32_MIN;
1872 Inst.addOperand(MCOperand::CreateImm(imm));
1874 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
1879 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1880 uint64_t Address, const void *Decoder) {
1881 DecodeStatus S = MCDisassembler::Success;
1883 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1884 unsigned U = fieldFromInstruction32(Val, 8, 1);
1885 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1887 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1888 return MCDisassembler::Fail;
1891 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1893 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1898 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1899 uint64_t Address, const void *Decoder) {
1900 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1904 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1905 uint64_t Address, const void *Decoder) {
1906 DecodeStatus S = MCDisassembler::Success;
1908 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1909 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1912 Inst.setOpcode(ARM::BLXi);
1913 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1914 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1918 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8, true,
1920 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1921 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1922 return MCDisassembler::Fail;
1928 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1929 uint64_t Address, const void *Decoder) {
1930 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1931 return MCDisassembler::Success;
1934 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1935 uint64_t Address, const void *Decoder) {
1936 DecodeStatus S = MCDisassembler::Success;
1938 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1939 unsigned align = fieldFromInstruction32(Val, 4, 2);
1941 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1942 return MCDisassembler::Fail;
1944 Inst.addOperand(MCOperand::CreateImm(0));
1946 Inst.addOperand(MCOperand::CreateImm(4 << align));
1951 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1952 uint64_t Address, const void *Decoder) {
1953 DecodeStatus S = MCDisassembler::Success;
1955 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1956 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1957 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1958 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1959 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1960 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1962 // First output register
1963 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1964 return MCDisassembler::Fail;
1966 // Second output register
1967 switch (Inst.getOpcode()) {
1972 case ARM::VLD1q8_UPD:
1973 case ARM::VLD1q16_UPD:
1974 case ARM::VLD1q32_UPD:
1975 case ARM::VLD1q64_UPD:
1980 case ARM::VLD1d8T_UPD:
1981 case ARM::VLD1d16T_UPD:
1982 case ARM::VLD1d32T_UPD:
1983 case ARM::VLD1d64T_UPD:
1988 case ARM::VLD1d8Q_UPD:
1989 case ARM::VLD1d16Q_UPD:
1990 case ARM::VLD1d32Q_UPD:
1991 case ARM::VLD1d64Q_UPD:
1995 case ARM::VLD2d8_UPD:
1996 case ARM::VLD2d16_UPD:
1997 case ARM::VLD2d32_UPD:
2001 case ARM::VLD2q8_UPD:
2002 case ARM::VLD2q16_UPD:
2003 case ARM::VLD2q32_UPD:
2007 case ARM::VLD3d8_UPD:
2008 case ARM::VLD3d16_UPD:
2009 case ARM::VLD3d32_UPD:
2013 case ARM::VLD4d8_UPD:
2014 case ARM::VLD4d16_UPD:
2015 case ARM::VLD4d32_UPD:
2016 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2017 return MCDisassembler::Fail;
2022 case ARM::VLD2b8_UPD:
2023 case ARM::VLD2b16_UPD:
2024 case ARM::VLD2b32_UPD:
2028 case ARM::VLD3q8_UPD:
2029 case ARM::VLD3q16_UPD:
2030 case ARM::VLD3q32_UPD:
2034 case ARM::VLD4q8_UPD:
2035 case ARM::VLD4q16_UPD:
2036 case ARM::VLD4q32_UPD:
2037 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2038 return MCDisassembler::Fail;
2043 // Third output register
2044 switch(Inst.getOpcode()) {
2049 case ARM::VLD1d8T_UPD:
2050 case ARM::VLD1d16T_UPD:
2051 case ARM::VLD1d32T_UPD:
2052 case ARM::VLD1d64T_UPD:
2057 case ARM::VLD1d8Q_UPD:
2058 case ARM::VLD1d16Q_UPD:
2059 case ARM::VLD1d32Q_UPD:
2060 case ARM::VLD1d64Q_UPD:
2064 case ARM::VLD2q8_UPD:
2065 case ARM::VLD2q16_UPD:
2066 case ARM::VLD2q32_UPD:
2070 case ARM::VLD3d8_UPD:
2071 case ARM::VLD3d16_UPD:
2072 case ARM::VLD3d32_UPD:
2076 case ARM::VLD4d8_UPD:
2077 case ARM::VLD4d16_UPD:
2078 case ARM::VLD4d32_UPD:
2079 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2080 return MCDisassembler::Fail;
2085 case ARM::VLD3q8_UPD:
2086 case ARM::VLD3q16_UPD:
2087 case ARM::VLD3q32_UPD:
2091 case ARM::VLD4q8_UPD:
2092 case ARM::VLD4q16_UPD:
2093 case ARM::VLD4q32_UPD:
2094 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2095 return MCDisassembler::Fail;
2101 // Fourth output register
2102 switch (Inst.getOpcode()) {
2107 case ARM::VLD1d8Q_UPD:
2108 case ARM::VLD1d16Q_UPD:
2109 case ARM::VLD1d32Q_UPD:
2110 case ARM::VLD1d64Q_UPD:
2114 case ARM::VLD2q8_UPD:
2115 case ARM::VLD2q16_UPD:
2116 case ARM::VLD2q32_UPD:
2120 case ARM::VLD4d8_UPD:
2121 case ARM::VLD4d16_UPD:
2122 case ARM::VLD4d32_UPD:
2123 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2124 return MCDisassembler::Fail;
2129 case ARM::VLD4q8_UPD:
2130 case ARM::VLD4q16_UPD:
2131 case ARM::VLD4q32_UPD:
2132 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2133 return MCDisassembler::Fail;
2139 // Writeback operand
2140 switch (Inst.getOpcode()) {
2141 case ARM::VLD1d8_UPD:
2142 case ARM::VLD1d16_UPD:
2143 case ARM::VLD1d32_UPD:
2144 case ARM::VLD1d64_UPD:
2145 case ARM::VLD1q8_UPD:
2146 case ARM::VLD1q16_UPD:
2147 case ARM::VLD1q32_UPD:
2148 case ARM::VLD1q64_UPD:
2149 case ARM::VLD1d8T_UPD:
2150 case ARM::VLD1d16T_UPD:
2151 case ARM::VLD1d32T_UPD:
2152 case ARM::VLD1d64T_UPD:
2153 case ARM::VLD1d8Q_UPD:
2154 case ARM::VLD1d16Q_UPD:
2155 case ARM::VLD1d32Q_UPD:
2156 case ARM::VLD1d64Q_UPD:
2157 case ARM::VLD2d8_UPD:
2158 case ARM::VLD2d16_UPD:
2159 case ARM::VLD2d32_UPD:
2160 case ARM::VLD2q8_UPD:
2161 case ARM::VLD2q16_UPD:
2162 case ARM::VLD2q32_UPD:
2163 case ARM::VLD2b8_UPD:
2164 case ARM::VLD2b16_UPD:
2165 case ARM::VLD2b32_UPD:
2166 case ARM::VLD3d8_UPD:
2167 case ARM::VLD3d16_UPD:
2168 case ARM::VLD3d32_UPD:
2169 case ARM::VLD3q8_UPD:
2170 case ARM::VLD3q16_UPD:
2171 case ARM::VLD3q32_UPD:
2172 case ARM::VLD4d8_UPD:
2173 case ARM::VLD4d16_UPD:
2174 case ARM::VLD4d32_UPD:
2175 case ARM::VLD4q8_UPD:
2176 case ARM::VLD4q16_UPD:
2177 case ARM::VLD4q32_UPD:
2178 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2179 return MCDisassembler::Fail;
2185 // AddrMode6 Base (register+alignment)
2186 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2187 return MCDisassembler::Fail;
2189 // AddrMode6 Offset (register)
2191 Inst.addOperand(MCOperand::CreateReg(0));
2192 else if (Rm != 0xF) {
2193 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2194 return MCDisassembler::Fail;
2200 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
2201 uint64_t Address, const void *Decoder) {
2202 DecodeStatus S = MCDisassembler::Success;
2204 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2205 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2206 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
2207 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2208 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2209 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2211 // Writeback Operand
2212 switch (Inst.getOpcode()) {
2213 case ARM::VST1d8_UPD:
2214 case ARM::VST1d16_UPD:
2215 case ARM::VST1d32_UPD:
2216 case ARM::VST1d64_UPD:
2217 case ARM::VST1q8_UPD:
2218 case ARM::VST1q16_UPD:
2219 case ARM::VST1q32_UPD:
2220 case ARM::VST1q64_UPD:
2221 case ARM::VST1d8T_UPD:
2222 case ARM::VST1d16T_UPD:
2223 case ARM::VST1d32T_UPD:
2224 case ARM::VST1d64T_UPD:
2225 case ARM::VST1d8Q_UPD:
2226 case ARM::VST1d16Q_UPD:
2227 case ARM::VST1d32Q_UPD:
2228 case ARM::VST1d64Q_UPD:
2229 case ARM::VST2d8_UPD:
2230 case ARM::VST2d16_UPD:
2231 case ARM::VST2d32_UPD:
2232 case ARM::VST2q8_UPD:
2233 case ARM::VST2q16_UPD:
2234 case ARM::VST2q32_UPD:
2235 case ARM::VST2b8_UPD:
2236 case ARM::VST2b16_UPD:
2237 case ARM::VST2b32_UPD:
2238 case ARM::VST3d8_UPD:
2239 case ARM::VST3d16_UPD:
2240 case ARM::VST3d32_UPD:
2241 case ARM::VST3q8_UPD:
2242 case ARM::VST3q16_UPD:
2243 case ARM::VST3q32_UPD:
2244 case ARM::VST4d8_UPD:
2245 case ARM::VST4d16_UPD:
2246 case ARM::VST4d32_UPD:
2247 case ARM::VST4q8_UPD:
2248 case ARM::VST4q16_UPD:
2249 case ARM::VST4q32_UPD:
2250 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2251 return MCDisassembler::Fail;
2257 // AddrMode6 Base (register+alignment)
2258 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2259 return MCDisassembler::Fail;
2261 // AddrMode6 Offset (register)
2263 Inst.addOperand(MCOperand::CreateReg(0));
2264 else if (Rm != 0xF) {
2265 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2266 return MCDisassembler::Fail;
2269 // First input register
2270 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2271 return MCDisassembler::Fail;
2273 // Second input register
2274 switch (Inst.getOpcode()) {
2279 case ARM::VST1q8_UPD:
2280 case ARM::VST1q16_UPD:
2281 case ARM::VST1q32_UPD:
2282 case ARM::VST1q64_UPD:
2287 case ARM::VST1d8T_UPD:
2288 case ARM::VST1d16T_UPD:
2289 case ARM::VST1d32T_UPD:
2290 case ARM::VST1d64T_UPD:
2295 case ARM::VST1d8Q_UPD:
2296 case ARM::VST1d16Q_UPD:
2297 case ARM::VST1d32Q_UPD:
2298 case ARM::VST1d64Q_UPD:
2302 case ARM::VST2d8_UPD:
2303 case ARM::VST2d16_UPD:
2304 case ARM::VST2d32_UPD:
2308 case ARM::VST2q8_UPD:
2309 case ARM::VST2q16_UPD:
2310 case ARM::VST2q32_UPD:
2314 case ARM::VST3d8_UPD:
2315 case ARM::VST3d16_UPD:
2316 case ARM::VST3d32_UPD:
2320 case ARM::VST4d8_UPD:
2321 case ARM::VST4d16_UPD:
2322 case ARM::VST4d32_UPD:
2323 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2324 return MCDisassembler::Fail;
2329 case ARM::VST2b8_UPD:
2330 case ARM::VST2b16_UPD:
2331 case ARM::VST2b32_UPD:
2335 case ARM::VST3q8_UPD:
2336 case ARM::VST3q16_UPD:
2337 case ARM::VST3q32_UPD:
2341 case ARM::VST4q8_UPD:
2342 case ARM::VST4q16_UPD:
2343 case ARM::VST4q32_UPD:
2344 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2345 return MCDisassembler::Fail;
2351 // Third input register
2352 switch (Inst.getOpcode()) {
2357 case ARM::VST1d8T_UPD:
2358 case ARM::VST1d16T_UPD:
2359 case ARM::VST1d32T_UPD:
2360 case ARM::VST1d64T_UPD:
2365 case ARM::VST1d8Q_UPD:
2366 case ARM::VST1d16Q_UPD:
2367 case ARM::VST1d32Q_UPD:
2368 case ARM::VST1d64Q_UPD:
2372 case ARM::VST2q8_UPD:
2373 case ARM::VST2q16_UPD:
2374 case ARM::VST2q32_UPD:
2378 case ARM::VST3d8_UPD:
2379 case ARM::VST3d16_UPD:
2380 case ARM::VST3d32_UPD:
2384 case ARM::VST4d8_UPD:
2385 case ARM::VST4d16_UPD:
2386 case ARM::VST4d32_UPD:
2387 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2388 return MCDisassembler::Fail;
2393 case ARM::VST3q8_UPD:
2394 case ARM::VST3q16_UPD:
2395 case ARM::VST3q32_UPD:
2399 case ARM::VST4q8_UPD:
2400 case ARM::VST4q16_UPD:
2401 case ARM::VST4q32_UPD:
2402 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2403 return MCDisassembler::Fail;
2409 // Fourth input register
2410 switch (Inst.getOpcode()) {
2415 case ARM::VST1d8Q_UPD:
2416 case ARM::VST1d16Q_UPD:
2417 case ARM::VST1d32Q_UPD:
2418 case ARM::VST1d64Q_UPD:
2422 case ARM::VST2q8_UPD:
2423 case ARM::VST2q16_UPD:
2424 case ARM::VST2q32_UPD:
2428 case ARM::VST4d8_UPD:
2429 case ARM::VST4d16_UPD:
2430 case ARM::VST4d32_UPD:
2431 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2432 return MCDisassembler::Fail;
2437 case ARM::VST4q8_UPD:
2438 case ARM::VST4q16_UPD:
2439 case ARM::VST4q32_UPD:
2440 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2441 return MCDisassembler::Fail;
2450 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2451 uint64_t Address, const void *Decoder) {
2452 DecodeStatus S = MCDisassembler::Success;
2454 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2455 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2456 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2457 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2458 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2459 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2460 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
2462 align *= (1 << size);
2464 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2465 return MCDisassembler::Fail;
2467 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2468 return MCDisassembler::Fail;
2471 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2472 return MCDisassembler::Fail;
2475 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2476 return MCDisassembler::Fail;
2477 Inst.addOperand(MCOperand::CreateImm(align));
2480 Inst.addOperand(MCOperand::CreateReg(0));
2481 else if (Rm != 0xF) {
2482 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2483 return MCDisassembler::Fail;
2489 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2490 uint64_t Address, const void *Decoder) {
2491 DecodeStatus S = MCDisassembler::Success;
2493 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2494 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2495 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2496 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2497 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2498 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2499 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2502 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2503 return MCDisassembler::Fail;
2504 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2505 return MCDisassembler::Fail;
2507 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2508 return MCDisassembler::Fail;
2511 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2512 return MCDisassembler::Fail;
2513 Inst.addOperand(MCOperand::CreateImm(align));
2516 Inst.addOperand(MCOperand::CreateReg(0));
2517 else if (Rm != 0xF) {
2518 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2519 return MCDisassembler::Fail;
2525 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2526 uint64_t Address, const void *Decoder) {
2527 DecodeStatus S = MCDisassembler::Success;
2529 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2530 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2531 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2532 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2533 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2535 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2536 return MCDisassembler::Fail;
2537 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2538 return MCDisassembler::Fail;
2539 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2540 return MCDisassembler::Fail;
2542 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2543 return MCDisassembler::Fail;
2546 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2547 return MCDisassembler::Fail;
2548 Inst.addOperand(MCOperand::CreateImm(0));
2551 Inst.addOperand(MCOperand::CreateReg(0));
2552 else if (Rm != 0xF) {
2553 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2554 return MCDisassembler::Fail;
2560 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2561 uint64_t Address, const void *Decoder) {
2562 DecodeStatus S = MCDisassembler::Success;
2564 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2565 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2566 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2567 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2568 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2569 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2570 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2585 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2586 return MCDisassembler::Fail;
2587 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2588 return MCDisassembler::Fail;
2589 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2590 return MCDisassembler::Fail;
2591 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2592 return MCDisassembler::Fail;
2594 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2595 return MCDisassembler::Fail;
2598 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2599 return MCDisassembler::Fail;
2600 Inst.addOperand(MCOperand::CreateImm(align));
2603 Inst.addOperand(MCOperand::CreateReg(0));
2604 else if (Rm != 0xF) {
2605 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2606 return MCDisassembler::Fail;
2613 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2614 uint64_t Address, const void *Decoder) {
2615 DecodeStatus S = MCDisassembler::Success;
2617 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2618 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2619 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2620 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2621 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2622 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2623 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2624 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2627 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2628 return MCDisassembler::Fail;
2630 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2631 return MCDisassembler::Fail;
2634 Inst.addOperand(MCOperand::CreateImm(imm));
2636 switch (Inst.getOpcode()) {
2637 case ARM::VORRiv4i16:
2638 case ARM::VORRiv2i32:
2639 case ARM::VBICiv4i16:
2640 case ARM::VBICiv2i32:
2641 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2642 return MCDisassembler::Fail;
2644 case ARM::VORRiv8i16:
2645 case ARM::VORRiv4i32:
2646 case ARM::VBICiv8i16:
2647 case ARM::VBICiv4i32:
2648 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2649 return MCDisassembler::Fail;
2658 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2659 uint64_t Address, const void *Decoder) {
2660 DecodeStatus S = MCDisassembler::Success;
2662 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2663 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2664 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2665 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2666 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2668 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2669 return MCDisassembler::Fail;
2670 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2671 return MCDisassembler::Fail;
2672 Inst.addOperand(MCOperand::CreateImm(8 << size));
2677 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2678 uint64_t Address, const void *Decoder) {
2679 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2680 return MCDisassembler::Success;
2683 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2684 uint64_t Address, const void *Decoder) {
2685 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2686 return MCDisassembler::Success;
2689 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2690 uint64_t Address, const void *Decoder) {
2691 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2692 return MCDisassembler::Success;
2695 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2696 uint64_t Address, const void *Decoder) {
2697 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2698 return MCDisassembler::Success;
2701 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2702 uint64_t Address, const void *Decoder) {
2703 DecodeStatus S = MCDisassembler::Success;
2705 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2706 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2707 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2708 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2709 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2710 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2711 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2712 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2714 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2715 return MCDisassembler::Fail;
2717 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2718 return MCDisassembler::Fail; // Writeback
2721 for (unsigned i = 0; i < length; ++i) {
2722 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)))
2723 return MCDisassembler::Fail;
2726 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2727 return MCDisassembler::Fail;
2732 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2733 uint64_t Address, const void *Decoder) {
2734 DecodeStatus S = MCDisassembler::Success;
2736 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2737 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2739 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2740 return MCDisassembler::Fail;
2742 switch(Inst.getOpcode()) {
2744 return MCDisassembler::Fail;
2746 break; // tADR does not explicitly represent the PC as an operand.
2748 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2752 Inst.addOperand(MCOperand::CreateImm(imm));
2756 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2757 uint64_t Address, const void *Decoder) {
2758 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2759 return MCDisassembler::Success;
2762 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2763 uint64_t Address, const void *Decoder) {
2764 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2765 return MCDisassembler::Success;
2768 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2769 uint64_t Address, const void *Decoder) {
2770 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2771 return MCDisassembler::Success;
2774 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2775 uint64_t Address, const void *Decoder) {
2776 DecodeStatus S = MCDisassembler::Success;
2778 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2779 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2781 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2782 return MCDisassembler::Fail;
2783 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2784 return MCDisassembler::Fail;
2789 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2790 uint64_t Address, const void *Decoder) {
2791 DecodeStatus S = MCDisassembler::Success;
2793 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2794 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2796 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2797 return MCDisassembler::Fail;
2798 Inst.addOperand(MCOperand::CreateImm(imm));
2803 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2804 uint64_t Address, const void *Decoder) {
2805 unsigned imm = Val << 2;
2807 Inst.addOperand(MCOperand::CreateImm(imm));
2808 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
2810 return MCDisassembler::Success;
2813 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2814 uint64_t Address, const void *Decoder) {
2815 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2816 Inst.addOperand(MCOperand::CreateImm(Val));
2818 return MCDisassembler::Success;
2821 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2822 uint64_t Address, const void *Decoder) {
2823 DecodeStatus S = MCDisassembler::Success;
2825 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2826 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2827 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2829 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2830 return MCDisassembler::Fail;
2831 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2832 return MCDisassembler::Fail;
2833 Inst.addOperand(MCOperand::CreateImm(imm));
2838 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2839 uint64_t Address, const void *Decoder) {
2840 DecodeStatus S = MCDisassembler::Success;
2842 switch (Inst.getOpcode()) {
2848 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2849 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2850 return MCDisassembler::Fail;
2854 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2856 switch (Inst.getOpcode()) {
2858 Inst.setOpcode(ARM::t2LDRBpci);
2861 Inst.setOpcode(ARM::t2LDRHpci);
2864 Inst.setOpcode(ARM::t2LDRSHpci);
2867 Inst.setOpcode(ARM::t2LDRSBpci);
2870 Inst.setOpcode(ARM::t2PLDi12);
2871 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2874 return MCDisassembler::Fail;
2877 int imm = fieldFromInstruction32(Insn, 0, 12);
2878 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2879 Inst.addOperand(MCOperand::CreateImm(imm));
2884 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2885 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2886 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2887 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2888 return MCDisassembler::Fail;
2893 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2894 uint64_t Address, const void *Decoder) {
2895 int imm = Val & 0xFF;
2896 if (!(Val & 0x100)) imm *= -1;
2897 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2899 return MCDisassembler::Success;
2902 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2903 uint64_t Address, const void *Decoder) {
2904 DecodeStatus S = MCDisassembler::Success;
2906 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2907 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2909 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2910 return MCDisassembler::Fail;
2911 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2912 return MCDisassembler::Fail;
2917 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
2918 uint64_t Address, const void *Decoder) {
2919 DecodeStatus S = MCDisassembler::Success;
2921 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
2922 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2924 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2925 return MCDisassembler::Fail;
2927 Inst.addOperand(MCOperand::CreateImm(imm));
2932 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2933 uint64_t Address, const void *Decoder) {
2934 int imm = Val & 0xFF;
2937 else if (!(Val & 0x100))
2939 Inst.addOperand(MCOperand::CreateImm(imm));
2941 return MCDisassembler::Success;
2945 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2946 uint64_t Address, const void *Decoder) {
2947 DecodeStatus S = MCDisassembler::Success;
2949 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2950 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2952 // Some instructions always use an additive offset.
2953 switch (Inst.getOpcode()) {
2968 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2969 return MCDisassembler::Fail;
2970 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2971 return MCDisassembler::Fail;
2976 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn,
2977 uint64_t Address, const void *Decoder) {
2978 DecodeStatus S = MCDisassembler::Success;
2980 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2981 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2982 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
2983 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
2985 unsigned load = fieldFromInstruction32(Insn, 20, 1);
2988 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2989 return MCDisassembler::Fail;
2992 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2993 return MCDisassembler::Fail;
2996 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2997 return MCDisassembler::Fail;
3000 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3001 return MCDisassembler::Fail;
3006 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
3007 uint64_t Address, const void *Decoder) {
3008 DecodeStatus S = MCDisassembler::Success;
3010 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
3011 unsigned imm = fieldFromInstruction32(Val, 0, 12);
3013 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3014 return MCDisassembler::Fail;
3015 Inst.addOperand(MCOperand::CreateImm(imm));
3021 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
3022 uint64_t Address, const void *Decoder) {
3023 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
3025 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3026 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3027 Inst.addOperand(MCOperand::CreateImm(imm));
3029 return MCDisassembler::Success;
3032 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
3033 uint64_t Address, const void *Decoder) {
3034 DecodeStatus S = MCDisassembler::Success;
3036 if (Inst.getOpcode() == ARM::tADDrSP) {
3037 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
3038 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
3040 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3041 return MCDisassembler::Fail;
3042 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3043 return MCDisassembler::Fail;
3044 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3045 } else if (Inst.getOpcode() == ARM::tADDspr) {
3046 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
3048 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3049 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3050 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3051 return MCDisassembler::Fail;
3057 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
3058 uint64_t Address, const void *Decoder) {
3059 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
3060 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
3062 Inst.addOperand(MCOperand::CreateImm(imod));
3063 Inst.addOperand(MCOperand::CreateImm(flags));
3065 return MCDisassembler::Success;
3068 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
3069 uint64_t Address, const void *Decoder) {
3070 DecodeStatus S = MCDisassembler::Success;
3071 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3072 unsigned add = fieldFromInstruction32(Insn, 4, 1);
3074 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3075 return MCDisassembler::Fail;
3076 Inst.addOperand(MCOperand::CreateImm(add));
3081 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
3082 uint64_t Address, const void *Decoder) {
3083 if (!tryAddingSymbolicOperand(Address,
3084 (Address & ~2u) + SignExtend32<22>(Val << 1) + 4,
3085 true, 4, Inst, Decoder))
3086 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3087 return MCDisassembler::Success;
3090 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
3091 uint64_t Address, const void *Decoder) {
3092 if (Val == 0xA || Val == 0xB)
3093 return MCDisassembler::Fail;
3095 Inst.addOperand(MCOperand::CreateImm(Val));
3096 return MCDisassembler::Success;
3100 DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Insn,
3101 uint64_t Address, const void *Decoder) {
3102 DecodeStatus S = MCDisassembler::Success;
3104 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3105 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3107 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3108 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3109 return MCDisassembler::Fail;
3110 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3111 return MCDisassembler::Fail;
3116 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
3117 uint64_t Address, const void *Decoder) {
3118 DecodeStatus S = MCDisassembler::Success;
3120 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
3121 if (pred == 0xE || pred == 0xF) {
3122 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
3125 return MCDisassembler::Fail;
3127 Inst.setOpcode(ARM::t2DSB);
3130 Inst.setOpcode(ARM::t2DMB);
3133 Inst.setOpcode(ARM::t2ISB);
3137 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
3138 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3141 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
3142 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
3143 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
3144 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
3145 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
3147 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3148 return MCDisassembler::Fail;
3149 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3150 return MCDisassembler::Fail;
3155 // Decode a shifted immediate operand. These basically consist
3156 // of an 8-bit value, and a 4-bit directive that specifies either
3157 // a splat operation or a rotation.
3158 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
3159 uint64_t Address, const void *Decoder) {
3160 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
3162 unsigned byte = fieldFromInstruction32(Val, 8, 2);
3163 unsigned imm = fieldFromInstruction32(Val, 0, 8);
3166 Inst.addOperand(MCOperand::CreateImm(imm));
3169 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3172 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3175 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3180 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
3181 unsigned rot = fieldFromInstruction32(Val, 7, 5);
3182 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3183 Inst.addOperand(MCOperand::CreateImm(imm));
3186 return MCDisassembler::Success;
3190 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
3191 uint64_t Address, const void *Decoder){
3192 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3193 return MCDisassembler::Success;
3196 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
3197 uint64_t Address, const void *Decoder){
3198 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3199 return MCDisassembler::Success;
3202 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
3203 uint64_t Address, const void *Decoder) {
3206 return MCDisassembler::Fail;
3218 Inst.addOperand(MCOperand::CreateImm(Val));
3219 return MCDisassembler::Success;
3222 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
3223 uint64_t Address, const void *Decoder) {
3224 if (!Val) return MCDisassembler::Fail;
3225 Inst.addOperand(MCOperand::CreateImm(Val));
3226 return MCDisassembler::Success;
3229 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
3230 uint64_t Address, const void *Decoder) {
3231 DecodeStatus S = MCDisassembler::Success;
3233 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3234 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3235 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3237 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3239 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3240 return MCDisassembler::Fail;
3241 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3242 return MCDisassembler::Fail;
3243 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3244 return MCDisassembler::Fail;
3245 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3246 return MCDisassembler::Fail;
3252 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
3253 uint64_t Address, const void *Decoder){
3254 DecodeStatus S = MCDisassembler::Success;
3256 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3257 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3258 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3259 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3261 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3262 return MCDisassembler::Fail;
3264 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3265 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3267 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3268 return MCDisassembler::Fail;
3269 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3270 return MCDisassembler::Fail;
3271 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3272 return MCDisassembler::Fail;
3273 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3274 return MCDisassembler::Fail;
3279 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
3280 uint64_t Address, const void *Decoder) {
3281 DecodeStatus S = MCDisassembler::Success;
3283 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3284 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3285 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3286 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3287 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3288 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3290 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3292 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3293 return MCDisassembler::Fail;
3294 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3295 return MCDisassembler::Fail;
3296 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3297 return MCDisassembler::Fail;
3298 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3299 return MCDisassembler::Fail;
3304 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
3305 uint64_t Address, const void *Decoder) {
3306 DecodeStatus S = MCDisassembler::Success;
3308 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3309 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3310 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3311 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3312 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3313 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3314 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3316 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3317 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3319 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3320 return MCDisassembler::Fail;
3321 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3322 return MCDisassembler::Fail;
3323 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3324 return MCDisassembler::Fail;
3325 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3326 return MCDisassembler::Fail;
3332 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3333 uint64_t Address, const void *Decoder) {
3334 DecodeStatus S = MCDisassembler::Success;
3336 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3337 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3338 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3339 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3340 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3341 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3343 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3345 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3346 return MCDisassembler::Fail;
3347 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3348 return MCDisassembler::Fail;
3349 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3350 return MCDisassembler::Fail;
3351 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3352 return MCDisassembler::Fail;
3357 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3358 uint64_t Address, const void *Decoder) {
3359 DecodeStatus S = MCDisassembler::Success;
3361 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3362 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3363 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3364 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3365 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3366 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3368 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3370 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3371 return MCDisassembler::Fail;
3372 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3373 return MCDisassembler::Fail;
3374 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3375 return MCDisassembler::Fail;
3376 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3377 return MCDisassembler::Fail;
3382 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3383 uint64_t Address, const void *Decoder) {
3384 DecodeStatus S = MCDisassembler::Success;
3386 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3387 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3388 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3389 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3390 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3396 return MCDisassembler::Fail;
3398 if (fieldFromInstruction32(Insn, 4, 1))
3399 return MCDisassembler::Fail; // UNDEFINED
3400 index = fieldFromInstruction32(Insn, 5, 3);
3403 if (fieldFromInstruction32(Insn, 5, 1))
3404 return MCDisassembler::Fail; // UNDEFINED
3405 index = fieldFromInstruction32(Insn, 6, 2);
3406 if (fieldFromInstruction32(Insn, 4, 1))
3410 if (fieldFromInstruction32(Insn, 6, 1))
3411 return MCDisassembler::Fail; // UNDEFINED
3412 index = fieldFromInstruction32(Insn, 7, 1);
3413 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3417 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3418 return MCDisassembler::Fail;
3419 if (Rm != 0xF) { // Writeback
3420 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3421 return MCDisassembler::Fail;
3423 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3424 return MCDisassembler::Fail;
3425 Inst.addOperand(MCOperand::CreateImm(align));
3428 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3429 return MCDisassembler::Fail;
3431 Inst.addOperand(MCOperand::CreateReg(0));
3434 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3435 return MCDisassembler::Fail;
3436 Inst.addOperand(MCOperand::CreateImm(index));
3441 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3442 uint64_t Address, const void *Decoder) {
3443 DecodeStatus S = MCDisassembler::Success;
3445 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3446 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3447 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3448 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3449 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3455 return MCDisassembler::Fail;
3457 if (fieldFromInstruction32(Insn, 4, 1))
3458 return MCDisassembler::Fail; // UNDEFINED
3459 index = fieldFromInstruction32(Insn, 5, 3);
3462 if (fieldFromInstruction32(Insn, 5, 1))
3463 return MCDisassembler::Fail; // UNDEFINED
3464 index = fieldFromInstruction32(Insn, 6, 2);
3465 if (fieldFromInstruction32(Insn, 4, 1))
3469 if (fieldFromInstruction32(Insn, 6, 1))
3470 return MCDisassembler::Fail; // UNDEFINED
3471 index = fieldFromInstruction32(Insn, 7, 1);
3472 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3476 if (Rm != 0xF) { // Writeback
3477 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3478 return MCDisassembler::Fail;
3480 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3481 return MCDisassembler::Fail;
3482 Inst.addOperand(MCOperand::CreateImm(align));
3485 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3486 return MCDisassembler::Fail;
3488 Inst.addOperand(MCOperand::CreateReg(0));
3491 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3492 return MCDisassembler::Fail;
3493 Inst.addOperand(MCOperand::CreateImm(index));
3499 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3500 uint64_t Address, const void *Decoder) {
3501 DecodeStatus S = MCDisassembler::Success;
3503 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3504 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3505 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3506 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3507 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3514 return MCDisassembler::Fail;
3516 index = fieldFromInstruction32(Insn, 5, 3);
3517 if (fieldFromInstruction32(Insn, 4, 1))
3521 index = fieldFromInstruction32(Insn, 6, 2);
3522 if (fieldFromInstruction32(Insn, 4, 1))
3524 if (fieldFromInstruction32(Insn, 5, 1))
3528 if (fieldFromInstruction32(Insn, 5, 1))
3529 return MCDisassembler::Fail; // UNDEFINED
3530 index = fieldFromInstruction32(Insn, 7, 1);
3531 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3533 if (fieldFromInstruction32(Insn, 6, 1))
3538 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3539 return MCDisassembler::Fail;
3540 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3541 return MCDisassembler::Fail;
3542 if (Rm != 0xF) { // Writeback
3543 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3544 return MCDisassembler::Fail;
3546 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3547 return MCDisassembler::Fail;
3548 Inst.addOperand(MCOperand::CreateImm(align));
3551 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3552 return MCDisassembler::Fail;
3554 Inst.addOperand(MCOperand::CreateReg(0));
3557 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3558 return MCDisassembler::Fail;
3559 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3560 return MCDisassembler::Fail;
3561 Inst.addOperand(MCOperand::CreateImm(index));
3566 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3567 uint64_t Address, const void *Decoder) {
3568 DecodeStatus S = MCDisassembler::Success;
3570 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3571 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3572 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3573 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3574 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3581 return MCDisassembler::Fail;
3583 index = fieldFromInstruction32(Insn, 5, 3);
3584 if (fieldFromInstruction32(Insn, 4, 1))
3588 index = fieldFromInstruction32(Insn, 6, 2);
3589 if (fieldFromInstruction32(Insn, 4, 1))
3591 if (fieldFromInstruction32(Insn, 5, 1))
3595 if (fieldFromInstruction32(Insn, 5, 1))
3596 return MCDisassembler::Fail; // UNDEFINED
3597 index = fieldFromInstruction32(Insn, 7, 1);
3598 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3600 if (fieldFromInstruction32(Insn, 6, 1))
3605 if (Rm != 0xF) { // Writeback
3606 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3607 return MCDisassembler::Fail;
3609 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3610 return MCDisassembler::Fail;
3611 Inst.addOperand(MCOperand::CreateImm(align));
3614 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3615 return MCDisassembler::Fail;
3617 Inst.addOperand(MCOperand::CreateReg(0));
3620 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3621 return MCDisassembler::Fail;
3622 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3623 return MCDisassembler::Fail;
3624 Inst.addOperand(MCOperand::CreateImm(index));
3630 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3631 uint64_t Address, const void *Decoder) {
3632 DecodeStatus S = MCDisassembler::Success;
3634 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3635 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3636 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3637 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3638 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3645 return MCDisassembler::Fail;
3647 if (fieldFromInstruction32(Insn, 4, 1))
3648 return MCDisassembler::Fail; // UNDEFINED
3649 index = fieldFromInstruction32(Insn, 5, 3);
3652 if (fieldFromInstruction32(Insn, 4, 1))
3653 return MCDisassembler::Fail; // UNDEFINED
3654 index = fieldFromInstruction32(Insn, 6, 2);
3655 if (fieldFromInstruction32(Insn, 5, 1))
3659 if (fieldFromInstruction32(Insn, 4, 2))
3660 return MCDisassembler::Fail; // UNDEFINED
3661 index = fieldFromInstruction32(Insn, 7, 1);
3662 if (fieldFromInstruction32(Insn, 6, 1))
3667 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3668 return MCDisassembler::Fail;
3669 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3670 return MCDisassembler::Fail;
3671 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3672 return MCDisassembler::Fail;
3674 if (Rm != 0xF) { // Writeback
3675 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3676 return MCDisassembler::Fail;
3678 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3679 return MCDisassembler::Fail;
3680 Inst.addOperand(MCOperand::CreateImm(align));
3683 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3684 return MCDisassembler::Fail;
3686 Inst.addOperand(MCOperand::CreateReg(0));
3689 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3690 return MCDisassembler::Fail;
3691 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3692 return MCDisassembler::Fail;
3693 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3694 return MCDisassembler::Fail;
3695 Inst.addOperand(MCOperand::CreateImm(index));
3700 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3701 uint64_t Address, const void *Decoder) {
3702 DecodeStatus S = MCDisassembler::Success;
3704 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3705 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3706 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3707 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3708 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3715 return MCDisassembler::Fail;
3717 if (fieldFromInstruction32(Insn, 4, 1))
3718 return MCDisassembler::Fail; // UNDEFINED
3719 index = fieldFromInstruction32(Insn, 5, 3);
3722 if (fieldFromInstruction32(Insn, 4, 1))
3723 return MCDisassembler::Fail; // UNDEFINED
3724 index = fieldFromInstruction32(Insn, 6, 2);
3725 if (fieldFromInstruction32(Insn, 5, 1))
3729 if (fieldFromInstruction32(Insn, 4, 2))
3730 return MCDisassembler::Fail; // UNDEFINED
3731 index = fieldFromInstruction32(Insn, 7, 1);
3732 if (fieldFromInstruction32(Insn, 6, 1))
3737 if (Rm != 0xF) { // Writeback
3738 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3739 return MCDisassembler::Fail;
3741 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3742 return MCDisassembler::Fail;
3743 Inst.addOperand(MCOperand::CreateImm(align));
3746 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3747 return MCDisassembler::Fail;
3749 Inst.addOperand(MCOperand::CreateReg(0));
3752 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3753 return MCDisassembler::Fail;
3754 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3755 return MCDisassembler::Fail;
3756 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3757 return MCDisassembler::Fail;
3758 Inst.addOperand(MCOperand::CreateImm(index));
3764 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3765 uint64_t Address, const void *Decoder) {
3766 DecodeStatus S = MCDisassembler::Success;
3768 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3769 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3770 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3771 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3772 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3779 return MCDisassembler::Fail;
3781 if (fieldFromInstruction32(Insn, 4, 1))
3783 index = fieldFromInstruction32(Insn, 5, 3);
3786 if (fieldFromInstruction32(Insn, 4, 1))
3788 index = fieldFromInstruction32(Insn, 6, 2);
3789 if (fieldFromInstruction32(Insn, 5, 1))
3793 if (fieldFromInstruction32(Insn, 4, 2))
3794 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3795 index = fieldFromInstruction32(Insn, 7, 1);
3796 if (fieldFromInstruction32(Insn, 6, 1))
3801 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3802 return MCDisassembler::Fail;
3803 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3804 return MCDisassembler::Fail;
3805 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3806 return MCDisassembler::Fail;
3807 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3808 return MCDisassembler::Fail;
3810 if (Rm != 0xF) { // Writeback
3811 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3812 return MCDisassembler::Fail;
3814 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3815 return MCDisassembler::Fail;
3816 Inst.addOperand(MCOperand::CreateImm(align));
3819 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3820 return MCDisassembler::Fail;
3822 Inst.addOperand(MCOperand::CreateReg(0));
3825 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3826 return MCDisassembler::Fail;
3827 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3828 return MCDisassembler::Fail;
3829 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3830 return MCDisassembler::Fail;
3831 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3832 return MCDisassembler::Fail;
3833 Inst.addOperand(MCOperand::CreateImm(index));
3838 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3839 uint64_t Address, const void *Decoder) {
3840 DecodeStatus S = MCDisassembler::Success;
3842 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3843 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3844 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3845 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3846 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3853 return MCDisassembler::Fail;
3855 if (fieldFromInstruction32(Insn, 4, 1))
3857 index = fieldFromInstruction32(Insn, 5, 3);
3860 if (fieldFromInstruction32(Insn, 4, 1))
3862 index = fieldFromInstruction32(Insn, 6, 2);
3863 if (fieldFromInstruction32(Insn, 5, 1))
3867 if (fieldFromInstruction32(Insn, 4, 2))
3868 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3869 index = fieldFromInstruction32(Insn, 7, 1);
3870 if (fieldFromInstruction32(Insn, 6, 1))
3875 if (Rm != 0xF) { // Writeback
3876 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3877 return MCDisassembler::Fail;
3879 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3880 return MCDisassembler::Fail;
3881 Inst.addOperand(MCOperand::CreateImm(align));
3884 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3885 return MCDisassembler::Fail;
3887 Inst.addOperand(MCOperand::CreateReg(0));
3890 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3891 return MCDisassembler::Fail;
3892 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3893 return MCDisassembler::Fail;
3894 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3895 return MCDisassembler::Fail;
3896 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3897 return MCDisassembler::Fail;
3898 Inst.addOperand(MCOperand::CreateImm(index));
3903 static DecodeStatus DecodeVMOVSRR(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, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3916 return MCDisassembler::Fail;
3917 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3918 return MCDisassembler::Fail;
3919 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3920 return MCDisassembler::Fail;
3921 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3922 return MCDisassembler::Fail;
3923 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3924 return MCDisassembler::Fail;
3929 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3930 uint64_t Address, const void *Decoder) {
3931 DecodeStatus S = MCDisassembler::Success;
3932 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3933 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3934 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3935 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3936 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3938 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3939 S = MCDisassembler::SoftFail;
3941 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3942 return MCDisassembler::Fail;
3943 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3944 return MCDisassembler::Fail;
3945 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3946 return MCDisassembler::Fail;
3947 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3948 return MCDisassembler::Fail;
3949 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3950 return MCDisassembler::Fail;
3955 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3956 uint64_t Address, const void *Decoder) {
3957 DecodeStatus S = MCDisassembler::Success;
3958 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3959 // The InstPrinter needs to have the low bit of the predicate in
3960 // the mask operand to be able to print it properly.
3961 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3965 S = MCDisassembler::SoftFail;
3968 if ((mask & 0xF) == 0) {
3969 // Preserve the high bit of the mask, which is the low bit of
3973 S = MCDisassembler::SoftFail;
3976 Inst.addOperand(MCOperand::CreateImm(pred));
3977 Inst.addOperand(MCOperand::CreateImm(mask));
3982 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3983 uint64_t Address, const void *Decoder) {
3984 DecodeStatus S = MCDisassembler::Success;
3986 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3987 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3988 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3989 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3990 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3991 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3992 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3993 bool writeback = (W == 1) | (P == 0);
3995 addr |= (U << 8) | (Rn << 9);
3997 if (writeback && (Rn == Rt || Rn == Rt2))
3998 Check(S, MCDisassembler::SoftFail);
4000 Check(S, MCDisassembler::SoftFail);
4003 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4004 return MCDisassembler::Fail;
4006 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4007 return MCDisassembler::Fail;
4008 // Writeback operand
4009 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4010 return MCDisassembler::Fail;
4012 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4013 return MCDisassembler::Fail;
4019 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
4020 uint64_t Address, const void *Decoder) {
4021 DecodeStatus S = MCDisassembler::Success;
4023 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
4024 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
4025 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
4026 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
4027 unsigned W = fieldFromInstruction32(Insn, 21, 1);
4028 unsigned U = fieldFromInstruction32(Insn, 23, 1);
4029 unsigned P = fieldFromInstruction32(Insn, 24, 1);
4030 bool writeback = (W == 1) | (P == 0);
4032 addr |= (U << 8) | (Rn << 9);
4034 if (writeback && (Rn == Rt || Rn == Rt2))
4035 Check(S, MCDisassembler::SoftFail);
4037 // Writeback operand
4038 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4039 return MCDisassembler::Fail;
4041 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4042 return MCDisassembler::Fail;
4044 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4045 return MCDisassembler::Fail;
4047 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4048 return MCDisassembler::Fail;
4053 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn,
4054 uint64_t Address, const void *Decoder) {
4055 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
4056 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
4057 if (sign1 != sign2) return MCDisassembler::Fail;
4059 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
4060 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
4061 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
4063 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4065 return MCDisassembler::Success;
4068 static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, uint32_t Val,
4070 const void *Decoder) {
4071 DecodeStatus S = MCDisassembler::Success;
4073 // Shift of "asr #32" is not allowed in Thumb2 mode.
4074 if (Val == 0x20) S = MCDisassembler::SoftFail;
4075 Inst.addOperand(MCOperand::CreateImm(Val));