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/ARMBaseInfo.h"
17 #include "llvm/MC/EDInstInfo.h"
18 #include "llvm/MC/MCInst.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCContext.h"
21 #include "llvm/MC/MCDisassembler.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/MemoryObject.h"
24 #include "llvm/Support/ErrorHandling.h"
25 #include "llvm/Support/TargetRegistry.h"
26 #include "llvm/Support/raw_ostream.h"
30 typedef MCDisassembler::DecodeStatus DecodeStatus;
33 /// ARMDisassembler - ARM disassembler for all ARM platforms.
34 class ARMDisassembler : public MCDisassembler {
36 /// Constructor - Initializes the disassembler.
38 ARMDisassembler(const MCSubtargetInfo &STI) :
45 /// getInstruction - See MCDisassembler.
46 DecodeStatus getInstruction(MCInst &instr,
48 const MemoryObject ®ion,
51 raw_ostream &cStream) const;
53 /// getEDInfo - See MCDisassembler.
54 EDInstInfo *getEDInfo() const;
58 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
59 class ThumbDisassembler : public MCDisassembler {
61 /// Constructor - Initializes the disassembler.
63 ThumbDisassembler(const MCSubtargetInfo &STI) :
67 ~ThumbDisassembler() {
70 /// getInstruction - See MCDisassembler.
71 DecodeStatus getInstruction(MCInst &instr,
73 const MemoryObject ®ion,
76 raw_ostream &cStream) const;
78 /// getEDInfo - See MCDisassembler.
79 EDInstInfo *getEDInfo() const;
81 mutable std::vector<unsigned> ITBlock;
82 DecodeStatus AddThumbPredicate(MCInst&) const;
83 void UpdateThumbVFPPredicate(MCInst&) const;
87 static bool Check(DecodeStatus &Out, DecodeStatus In) {
89 case MCDisassembler::Success:
90 // Out stays the same.
92 case MCDisassembler::SoftFail:
95 case MCDisassembler::Fail:
103 // Forward declare these because the autogenerated code will reference them.
104 // Definitions are further down.
105 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
106 uint64_t Address, const void *Decoder);
107 static DecodeStatus DecodeGPRnopcRegisterClass(llvm::MCInst &Inst,
108 unsigned RegNo, uint64_t Address,
109 const void *Decoder);
110 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
111 uint64_t Address, const void *Decoder);
112 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
113 uint64_t Address, const void *Decoder);
114 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
115 uint64_t Address, const void *Decoder);
116 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
117 uint64_t Address, const void *Decoder);
118 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
119 uint64_t Address, const void *Decoder);
120 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
121 uint64_t Address, const void *Decoder);
122 static DecodeStatus DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst,
125 const void *Decoder);
126 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
127 uint64_t Address, const void *Decoder);
129 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
130 uint64_t Address, const void *Decoder);
131 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
132 uint64_t Address, const void *Decoder);
133 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
134 uint64_t Address, const void *Decoder);
135 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
136 uint64_t Address, const void *Decoder);
137 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
138 uint64_t Address, const void *Decoder);
139 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
140 uint64_t Address, const void *Decoder);
142 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Insn,
143 uint64_t Address, const void *Decoder);
144 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
145 uint64_t Address, const void *Decoder);
146 static DecodeStatus DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst,
149 const void *Decoder);
150 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Insn,
151 uint64_t Address, const void *Decoder);
152 static DecodeStatus DecodeAddrMode3Instruction(llvm::MCInst &Inst,unsigned Insn,
153 uint64_t Address, const void *Decoder);
154 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Insn,
155 uint64_t Address, const void *Decoder);
156 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Insn,
157 uint64_t Address, const void *Decoder);
159 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst & Inst,
162 const void *Decoder);
163 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
164 uint64_t Address, const void *Decoder);
165 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
166 uint64_t Address, const void *Decoder);
167 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
168 uint64_t Address, const void *Decoder);
169 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
170 uint64_t Address, const void *Decoder);
171 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
172 uint64_t Address, const void *Decoder);
173 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
174 uint64_t Address, const void *Decoder);
175 static DecodeStatus DecodeBranchImmInstruction(llvm::MCInst &Inst,unsigned Insn,
176 uint64_t Address, const void *Decoder);
177 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
178 uint64_t Address, const void *Decoder);
179 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
180 uint64_t Address, const void *Decoder);
181 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Val,
182 uint64_t Address, const void *Decoder);
183 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Val,
184 uint64_t Address, const void *Decoder);
185 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Val,
186 uint64_t Address, const void *Decoder);
187 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Val,
188 uint64_t Address, const void *Decoder);
189 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Val,
190 uint64_t Address, const void *Decoder);
191 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Val,
192 uint64_t Address, const void *Decoder);
193 static DecodeStatus DecodeNEONModImmInstruction(llvm::MCInst &Inst,unsigned Val,
194 uint64_t Address, const void *Decoder);
195 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Val,
196 uint64_t Address, const void *Decoder);
197 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
198 uint64_t Address, const void *Decoder);
199 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
200 uint64_t Address, const void *Decoder);
201 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
202 uint64_t Address, const void *Decoder);
203 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
204 uint64_t Address, const void *Decoder);
205 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
206 uint64_t Address, const void *Decoder);
207 static DecodeStatus DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
208 uint64_t Address, const void *Decoder);
209 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
210 uint64_t Address, const void *Decoder);
211 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Insn,
212 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
214 uint64_t Address, const void *Decoder);
215 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn,
216 uint64_t Address, const void *Decoder);
217 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
218 uint64_t Address, const void *Decoder);
219 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
220 uint64_t Address, const void *Decoder);
221 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
222 uint64_t Address, const void *Decoder);
223 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
224 uint64_t Address, const void *Decoder);
225 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
226 uint64_t Address, const void *Decoder);
227 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
228 uint64_t Address, const void *Decoder);
229 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
230 uint64_t Address, const void *Decoder);
231 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
232 uint64_t Address, const void *Decoder);
233 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
234 uint64_t Address, const void *Decoder);
235 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
236 uint64_t Address, const void *Decoder);
237 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
238 uint64_t Address, const void *Decoder);
239 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
240 uint64_t Address, const void *Decoder);
241 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
242 uint64_t Address, const void *Decoder);
243 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
244 uint64_t Address, const void *Decoder);
245 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
246 uint64_t Address, const void *Decoder);
247 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
248 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
251 uint64_t Address, const void *Decoder);
252 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
253 uint64_t Address, const void *Decoder);
254 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
255 uint64_t Address, const void *Decoder);
256 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
257 uint64_t Address, const void *Decoder);
258 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
259 uint64_t Address, const void *Decoder);
260 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
261 uint64_t Address, const void *Decoder);
262 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
263 uint64_t Address, const void *Decoder);
264 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
265 uint64_t Address, const void *Decoder);
266 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
267 uint64_t Address, const void *Decoder);
268 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
269 uint64_t Address, const void *Decoder);
270 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
271 uint64_t Address, const void *Decoder);
272 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Val,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Val,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeT2LDRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeT2STRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, unsigned Val,
307 uint64_t Address, const void *Decoder);
308 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Val,
309 uint64_t Address, const void *Decoder);
312 #include "ARMGenDisassemblerTables.inc"
313 #include "ARMGenInstrInfo.inc"
314 #include "ARMGenEDInfo.inc"
316 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
317 return new ARMDisassembler(STI);
320 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
321 return new ThumbDisassembler(STI);
324 EDInstInfo *ARMDisassembler::getEDInfo() const {
328 EDInstInfo *ThumbDisassembler::getEDInfo() const {
332 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
333 const MemoryObject &Region,
336 raw_ostream &cs) const {
339 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
340 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
342 // We want to read exactly 4 bytes of data.
343 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
345 return MCDisassembler::Fail;
348 // Encoded as a small-endian 32-bit word in the stream.
349 uint32_t insn = (bytes[3] << 24) |
354 // Calling the auto-generated decoder function.
355 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
356 if (result != MCDisassembler::Fail) {
361 // VFP and NEON instructions, similarly, are shared between ARM
364 result = decodeVFPInstruction32(MI, insn, Address, this, STI);
365 if (result != MCDisassembler::Fail) {
371 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
372 if (result != MCDisassembler::Fail) {
374 // Add a fake predicate operand, because we share these instruction
375 // definitions with Thumb2 where these instructions are predicable.
376 if (!DecodePredicateOperand(MI, 0xE, Address, this))
377 return MCDisassembler::Fail;
382 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
383 if (result != MCDisassembler::Fail) {
385 // Add a fake predicate operand, because we share these instruction
386 // definitions with Thumb2 where these instructions are predicable.
387 if (!DecodePredicateOperand(MI, 0xE, Address, this))
388 return MCDisassembler::Fail;
393 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
394 if (result != MCDisassembler::Fail) {
396 // Add a fake predicate operand, because we share these instruction
397 // definitions with Thumb2 where these instructions are predicable.
398 if (!DecodePredicateOperand(MI, 0xE, Address, this))
399 return MCDisassembler::Fail;
406 return MCDisassembler::Fail;
410 extern MCInstrDesc ARMInsts[];
413 // Thumb1 instructions don't have explicit S bits. Rather, they
414 // implicitly set CPSR. Since it's not represented in the encoding, the
415 // auto-generated decoder won't inject the CPSR operand. We need to fix
416 // that as a post-pass.
417 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
418 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
419 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
420 MCInst::iterator I = MI.begin();
421 for (unsigned i = 0; i < NumOps; ++i, ++I) {
422 if (I == MI.end()) break;
423 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
424 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
425 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
430 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
433 // Most Thumb instructions don't have explicit predicates in the
434 // encoding, but rather get their predicates from IT context. We need
435 // to fix up the predicate operands using this context information as a
437 MCDisassembler::DecodeStatus
438 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
439 MCDisassembler::DecodeStatus S = Success;
441 // A few instructions actually have predicates encoded in them. Don't
442 // try to overwrite it if we're seeing one of those.
443 switch (MI.getOpcode()) {
452 // Some instructions (mostly conditional branches) are not
453 // allowed in IT blocks.
454 if (!ITBlock.empty())
463 // Some instructions (mostly unconditional branches) can
464 // only appears at the end of, or outside of, an IT.
465 if (ITBlock.size() > 1)
472 // If we're in an IT block, base the predicate on that. Otherwise,
473 // assume a predicate of AL.
475 if (!ITBlock.empty()) {
483 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
484 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
485 MCInst::iterator I = MI.begin();
486 for (unsigned i = 0; i < NumOps; ++i, ++I) {
487 if (I == MI.end()) break;
488 if (OpInfo[i].isPredicate()) {
489 I = MI.insert(I, MCOperand::CreateImm(CC));
492 MI.insert(I, MCOperand::CreateReg(0));
494 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
499 I = MI.insert(I, MCOperand::CreateImm(CC));
502 MI.insert(I, MCOperand::CreateReg(0));
504 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
509 // Thumb VFP instructions are a special case. Because we share their
510 // encodings between ARM and Thumb modes, and they are predicable in ARM
511 // mode, the auto-generated decoder will give them an (incorrect)
512 // predicate operand. We need to rewrite these operands based on the IT
513 // context as a post-pass.
514 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
516 if (!ITBlock.empty()) {
522 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
523 MCInst::iterator I = MI.begin();
524 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
525 for (unsigned i = 0; i < NumOps; ++i, ++I) {
526 if (OpInfo[i].isPredicate() ) {
532 I->setReg(ARM::CPSR);
538 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
539 const MemoryObject &Region,
542 raw_ostream &cs) const {
545 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
546 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
548 // We want to read exactly 2 bytes of data.
549 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
551 return MCDisassembler::Fail;
554 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
555 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
556 if (result != MCDisassembler::Fail) {
558 Check(result, AddThumbPredicate(MI));
563 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
566 bool InITBlock = !ITBlock.empty();
567 Check(result, AddThumbPredicate(MI));
568 AddThumb1SBit(MI, InITBlock);
573 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
574 if (result != MCDisassembler::Fail) {
576 Check(result, AddThumbPredicate(MI));
578 // If we find an IT instruction, we need to parse its condition
579 // code and mask operands so that we can apply them correctly
580 // to the subsequent instructions.
581 if (MI.getOpcode() == ARM::t2IT) {
582 // Nested IT blocks are UNPREDICTABLE.
583 if (!ITBlock.empty())
584 return MCDisassembler::SoftFail;
586 // (3 - the number of trailing zeros) is the number of then / else.
587 unsigned firstcond = MI.getOperand(0).getImm();
588 unsigned Mask = MI.getOperand(1).getImm();
589 unsigned CondBit0 = Mask >> 4 & 1;
590 unsigned NumTZ = CountTrailingZeros_32(Mask);
591 assert(NumTZ <= 3 && "Invalid IT mask!");
592 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
593 bool T = ((Mask >> Pos) & 1) == CondBit0;
595 ITBlock.insert(ITBlock.begin(), firstcond);
597 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
600 ITBlock.push_back(firstcond);
606 // We want to read exactly 4 bytes of data.
607 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
609 return MCDisassembler::Fail;
612 uint32_t insn32 = (bytes[3] << 8) |
617 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
618 if (result != MCDisassembler::Fail) {
620 bool InITBlock = ITBlock.size();
621 Check(result, AddThumbPredicate(MI));
622 AddThumb1SBit(MI, InITBlock);
627 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
628 if (result != MCDisassembler::Fail) {
630 Check(result, AddThumbPredicate(MI));
635 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
636 if (result != MCDisassembler::Fail) {
638 UpdateThumbVFPPredicate(MI);
643 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
644 if (result != MCDisassembler::Fail) {
646 Check(result, AddThumbPredicate(MI));
650 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
652 uint32_t NEONLdStInsn = insn32;
653 NEONLdStInsn &= 0xF0FFFFFF;
654 NEONLdStInsn |= 0x04000000;
655 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
656 if (result != MCDisassembler::Fail) {
658 Check(result, AddThumbPredicate(MI));
663 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
665 uint32_t NEONDataInsn = insn32;
666 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
667 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
668 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
669 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
670 if (result != MCDisassembler::Fail) {
672 Check(result, AddThumbPredicate(MI));
678 return MCDisassembler::Fail;
682 extern "C" void LLVMInitializeARMDisassembler() {
683 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
684 createARMDisassembler);
685 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
686 createThumbDisassembler);
689 static const unsigned GPRDecoderTable[] = {
690 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
691 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
692 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
693 ARM::R12, ARM::SP, ARM::LR, ARM::PC
696 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
697 uint64_t Address, const void *Decoder) {
699 return MCDisassembler::Fail;
701 unsigned Register = GPRDecoderTable[RegNo];
702 Inst.addOperand(MCOperand::CreateReg(Register));
703 return MCDisassembler::Success;
707 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
708 uint64_t Address, const void *Decoder) {
709 if (RegNo == 15) return MCDisassembler::Fail;
710 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
713 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
714 uint64_t Address, const void *Decoder) {
716 return MCDisassembler::Fail;
717 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
720 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
721 uint64_t Address, const void *Decoder) {
722 unsigned Register = 0;
743 return MCDisassembler::Fail;
746 Inst.addOperand(MCOperand::CreateReg(Register));
747 return MCDisassembler::Success;
750 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
751 uint64_t Address, const void *Decoder) {
752 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
753 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
756 static const unsigned SPRDecoderTable[] = {
757 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
758 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
759 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
760 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
761 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
762 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
763 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
764 ARM::S28, ARM::S29, ARM::S30, ARM::S31
767 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
768 uint64_t Address, const void *Decoder) {
770 return MCDisassembler::Fail;
772 unsigned Register = SPRDecoderTable[RegNo];
773 Inst.addOperand(MCOperand::CreateReg(Register));
774 return MCDisassembler::Success;
777 static const unsigned DPRDecoderTable[] = {
778 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
779 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
780 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
781 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
782 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
783 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
784 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
785 ARM::D28, ARM::D29, ARM::D30, ARM::D31
788 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
789 uint64_t Address, const void *Decoder) {
791 return MCDisassembler::Fail;
793 unsigned Register = DPRDecoderTable[RegNo];
794 Inst.addOperand(MCOperand::CreateReg(Register));
795 return MCDisassembler::Success;
798 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
799 uint64_t Address, const void *Decoder) {
801 return MCDisassembler::Fail;
802 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
806 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
807 uint64_t Address, const void *Decoder) {
809 return MCDisassembler::Fail;
810 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
813 static const unsigned QPRDecoderTable[] = {
814 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
815 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
816 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
817 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
821 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
822 uint64_t Address, const void *Decoder) {
824 return MCDisassembler::Fail;
827 unsigned Register = QPRDecoderTable[RegNo];
828 Inst.addOperand(MCOperand::CreateReg(Register));
829 return MCDisassembler::Success;
832 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
833 uint64_t Address, const void *Decoder) {
834 if (Val == 0xF) return MCDisassembler::Fail;
835 // AL predicate is not allowed on Thumb1 branches.
836 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
837 return MCDisassembler::Fail;
838 Inst.addOperand(MCOperand::CreateImm(Val));
839 if (Val == ARMCC::AL) {
840 Inst.addOperand(MCOperand::CreateReg(0));
842 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
843 return MCDisassembler::Success;
846 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
847 uint64_t Address, const void *Decoder) {
849 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
851 Inst.addOperand(MCOperand::CreateReg(0));
852 return MCDisassembler::Success;
855 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
856 uint64_t Address, const void *Decoder) {
857 uint32_t imm = Val & 0xFF;
858 uint32_t rot = (Val & 0xF00) >> 7;
859 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
860 Inst.addOperand(MCOperand::CreateImm(rot_imm));
861 return MCDisassembler::Success;
864 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
865 uint64_t Address, const void *Decoder) {
866 DecodeStatus S = MCDisassembler::Success;
868 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
869 unsigned type = fieldFromInstruction32(Val, 5, 2);
870 unsigned imm = fieldFromInstruction32(Val, 7, 5);
872 // Register-immediate
873 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
874 return MCDisassembler::Fail;
876 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
892 if (Shift == ARM_AM::ror && imm == 0)
895 unsigned Op = Shift | (imm << 3);
896 Inst.addOperand(MCOperand::CreateImm(Op));
901 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
902 uint64_t Address, const void *Decoder) {
903 DecodeStatus S = MCDisassembler::Success;
905 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
906 unsigned type = fieldFromInstruction32(Val, 5, 2);
907 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
910 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
911 return MCDisassembler::Fail;
912 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
913 return MCDisassembler::Fail;
915 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
931 Inst.addOperand(MCOperand::CreateImm(Shift));
936 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
937 uint64_t Address, const void *Decoder) {
938 DecodeStatus S = MCDisassembler::Success;
940 bool writebackLoad = false;
941 unsigned writebackReg = 0;
942 switch (Inst.getOpcode()) {
949 case ARM::t2LDMIA_UPD:
950 case ARM::t2LDMDB_UPD:
951 writebackLoad = true;
952 writebackReg = Inst.getOperand(0).getReg();
956 // Empty register lists are not allowed.
957 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
958 for (unsigned i = 0; i < 16; ++i) {
959 if (Val & (1 << i)) {
960 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
961 return MCDisassembler::Fail;
962 // Writeback not allowed if Rn is in the target list.
963 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
964 Check(S, MCDisassembler::SoftFail);
971 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
972 uint64_t Address, const void *Decoder) {
973 DecodeStatus S = MCDisassembler::Success;
975 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
976 unsigned regs = Val & 0xFF;
978 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
979 return MCDisassembler::Fail;
980 for (unsigned i = 0; i < (regs - 1); ++i) {
981 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
982 return MCDisassembler::Fail;
988 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
989 uint64_t Address, const void *Decoder) {
990 DecodeStatus S = MCDisassembler::Success;
992 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
993 unsigned regs = (Val & 0xFF) / 2;
995 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
996 return MCDisassembler::Fail;
997 for (unsigned i = 0; i < (regs - 1); ++i) {
998 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
999 return MCDisassembler::Fail;
1005 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
1006 uint64_t Address, const void *Decoder) {
1007 // This operand encodes a mask of contiguous zeros between a specified MSB
1008 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1009 // the mask of all bits LSB-and-lower, and then xor them to create
1010 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1011 // create the final mask.
1012 unsigned msb = fieldFromInstruction32(Val, 5, 5);
1013 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
1015 DecodeStatus S = MCDisassembler::Success;
1016 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1018 uint32_t msb_mask = 0xFFFFFFFF;
1019 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1020 uint32_t lsb_mask = (1U << lsb) - 1;
1022 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1026 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
1027 uint64_t Address, const void *Decoder) {
1028 DecodeStatus S = MCDisassembler::Success;
1030 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1031 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
1032 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
1033 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
1034 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1035 unsigned U = fieldFromInstruction32(Insn, 23, 1);
1037 switch (Inst.getOpcode()) {
1038 case ARM::LDC_OFFSET:
1041 case ARM::LDC_OPTION:
1042 case ARM::LDCL_OFFSET:
1044 case ARM::LDCL_POST:
1045 case ARM::LDCL_OPTION:
1046 case ARM::STC_OFFSET:
1049 case ARM::STC_OPTION:
1050 case ARM::STCL_OFFSET:
1052 case ARM::STCL_POST:
1053 case ARM::STCL_OPTION:
1054 case ARM::t2LDC_OFFSET:
1055 case ARM::t2LDC_PRE:
1056 case ARM::t2LDC_POST:
1057 case ARM::t2LDC_OPTION:
1058 case ARM::t2LDCL_OFFSET:
1059 case ARM::t2LDCL_PRE:
1060 case ARM::t2LDCL_POST:
1061 case ARM::t2LDCL_OPTION:
1062 case ARM::t2STC_OFFSET:
1063 case ARM::t2STC_PRE:
1064 case ARM::t2STC_POST:
1065 case ARM::t2STC_OPTION:
1066 case ARM::t2STCL_OFFSET:
1067 case ARM::t2STCL_PRE:
1068 case ARM::t2STCL_POST:
1069 case ARM::t2STCL_OPTION:
1070 if (coproc == 0xA || coproc == 0xB)
1071 return MCDisassembler::Fail;
1077 Inst.addOperand(MCOperand::CreateImm(coproc));
1078 Inst.addOperand(MCOperand::CreateImm(CRd));
1079 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1080 return MCDisassembler::Fail;
1081 switch (Inst.getOpcode()) {
1082 case ARM::LDC_OPTION:
1083 case ARM::LDCL_OPTION:
1084 case ARM::LDC2_OPTION:
1085 case ARM::LDC2L_OPTION:
1086 case ARM::STC_OPTION:
1087 case ARM::STCL_OPTION:
1088 case ARM::STC2_OPTION:
1089 case ARM::STC2L_OPTION:
1090 case ARM::LDCL_POST:
1091 case ARM::STCL_POST:
1092 case ARM::LDC2L_POST:
1093 case ARM::STC2L_POST:
1094 case ARM::t2LDC_OPTION:
1095 case ARM::t2LDCL_OPTION:
1096 case ARM::t2STC_OPTION:
1097 case ARM::t2STCL_OPTION:
1098 case ARM::t2LDCL_POST:
1099 case ARM::t2STCL_POST:
1102 Inst.addOperand(MCOperand::CreateReg(0));
1106 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1107 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1109 bool writeback = (P == 0) || (W == 1);
1110 unsigned idx_mode = 0;
1112 idx_mode = ARMII::IndexModePre;
1113 else if (!P && writeback)
1114 idx_mode = ARMII::IndexModePost;
1116 switch (Inst.getOpcode()) {
1117 case ARM::LDCL_POST:
1118 case ARM::STCL_POST:
1119 case ARM::t2LDCL_POST:
1120 case ARM::t2STCL_POST:
1121 case ARM::LDC2L_POST:
1122 case ARM::STC2L_POST:
1124 case ARM::LDC_OPTION:
1125 case ARM::LDCL_OPTION:
1126 case ARM::LDC2_OPTION:
1127 case ARM::LDC2L_OPTION:
1128 case ARM::STC_OPTION:
1129 case ARM::STCL_OPTION:
1130 case ARM::STC2_OPTION:
1131 case ARM::STC2L_OPTION:
1132 case ARM::t2LDC_OPTION:
1133 case ARM::t2LDCL_OPTION:
1134 case ARM::t2STC_OPTION:
1135 case ARM::t2STCL_OPTION:
1136 Inst.addOperand(MCOperand::CreateImm(imm));
1140 Inst.addOperand(MCOperand::CreateImm(
1141 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
1143 Inst.addOperand(MCOperand::CreateImm(
1144 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
1148 switch (Inst.getOpcode()) {
1149 case ARM::LDC_OFFSET:
1152 case ARM::LDC_OPTION:
1153 case ARM::LDCL_OFFSET:
1155 case ARM::LDCL_POST:
1156 case ARM::LDCL_OPTION:
1157 case ARM::STC_OFFSET:
1160 case ARM::STC_OPTION:
1161 case ARM::STCL_OFFSET:
1163 case ARM::STCL_POST:
1164 case ARM::STCL_OPTION:
1165 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1166 return MCDisassembler::Fail;
1176 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1177 uint64_t Address, const void *Decoder) {
1178 DecodeStatus S = MCDisassembler::Success;
1180 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1181 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1182 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1183 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1184 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1185 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1186 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1187 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1189 // On stores, the writeback operand precedes Rt.
1190 switch (Inst.getOpcode()) {
1191 case ARM::STR_POST_IMM:
1192 case ARM::STR_POST_REG:
1193 case ARM::STRB_POST_IMM:
1194 case ARM::STRB_POST_REG:
1195 case ARM::STRT_POST_REG:
1196 case ARM::STRT_POST_IMM:
1197 case ARM::STRBT_POST_REG:
1198 case ARM::STRBT_POST_IMM:
1199 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1200 return MCDisassembler::Fail;
1206 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1207 return MCDisassembler::Fail;
1209 // On loads, the writeback operand comes after Rt.
1210 switch (Inst.getOpcode()) {
1211 case ARM::LDR_POST_IMM:
1212 case ARM::LDR_POST_REG:
1213 case ARM::LDRB_POST_IMM:
1214 case ARM::LDRB_POST_REG:
1215 case ARM::LDRBT_POST_REG:
1216 case ARM::LDRBT_POST_IMM:
1217 case ARM::LDRT_POST_REG:
1218 case ARM::LDRT_POST_IMM:
1219 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1220 return MCDisassembler::Fail;
1226 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1227 return MCDisassembler::Fail;
1229 ARM_AM::AddrOpc Op = ARM_AM::add;
1230 if (!fieldFromInstruction32(Insn, 23, 1))
1233 bool writeback = (P == 0) || (W == 1);
1234 unsigned idx_mode = 0;
1236 idx_mode = ARMII::IndexModePre;
1237 else if (!P && writeback)
1238 idx_mode = ARMII::IndexModePost;
1240 if (writeback && (Rn == 15 || Rn == Rt))
1241 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1244 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1245 return MCDisassembler::Fail;
1246 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1247 switch( fieldFromInstruction32(Insn, 5, 2)) {
1261 return MCDisassembler::Fail;
1263 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1264 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1266 Inst.addOperand(MCOperand::CreateImm(imm));
1268 Inst.addOperand(MCOperand::CreateReg(0));
1269 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1270 Inst.addOperand(MCOperand::CreateImm(tmp));
1273 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1274 return MCDisassembler::Fail;
1279 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1280 uint64_t Address, const void *Decoder) {
1281 DecodeStatus S = MCDisassembler::Success;
1283 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1284 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1285 unsigned type = fieldFromInstruction32(Val, 5, 2);
1286 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1287 unsigned U = fieldFromInstruction32(Val, 12, 1);
1289 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1305 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1306 return MCDisassembler::Fail;
1307 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1308 return MCDisassembler::Fail;
1311 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1313 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1314 Inst.addOperand(MCOperand::CreateImm(shift));
1320 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1321 uint64_t Address, const void *Decoder) {
1322 DecodeStatus S = MCDisassembler::Success;
1324 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1325 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1326 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1327 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1328 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1329 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1330 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1331 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1332 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1334 bool writeback = (W == 1) | (P == 0);
1336 // For {LD,ST}RD, Rt must be even, else undefined.
1337 switch (Inst.getOpcode()) {
1340 case ARM::STRD_POST:
1343 case ARM::LDRD_POST:
1344 if (Rt & 0x1) return MCDisassembler::Fail;
1350 if (writeback) { // Writeback
1352 U |= ARMII::IndexModePre << 9;
1354 U |= ARMII::IndexModePost << 9;
1356 // On stores, the writeback operand precedes Rt.
1357 switch (Inst.getOpcode()) {
1360 case ARM::STRD_POST:
1363 case ARM::STRH_POST:
1364 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1365 return MCDisassembler::Fail;
1372 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1373 return MCDisassembler::Fail;
1374 switch (Inst.getOpcode()) {
1377 case ARM::STRD_POST:
1380 case ARM::LDRD_POST:
1381 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1382 return MCDisassembler::Fail;
1389 // On loads, the writeback operand comes after Rt.
1390 switch (Inst.getOpcode()) {
1393 case ARM::LDRD_POST:
1396 case ARM::LDRH_POST:
1398 case ARM::LDRSH_PRE:
1399 case ARM::LDRSH_POST:
1401 case ARM::LDRSB_PRE:
1402 case ARM::LDRSB_POST:
1405 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1406 return MCDisassembler::Fail;
1413 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1414 return MCDisassembler::Fail;
1417 Inst.addOperand(MCOperand::CreateReg(0));
1418 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1420 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1421 return MCDisassembler::Fail;
1422 Inst.addOperand(MCOperand::CreateImm(U));
1425 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1426 return MCDisassembler::Fail;
1431 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1432 uint64_t Address, const void *Decoder) {
1433 DecodeStatus S = MCDisassembler::Success;
1435 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1436 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1453 Inst.addOperand(MCOperand::CreateImm(mode));
1454 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1455 return MCDisassembler::Fail;
1460 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1462 uint64_t Address, const void *Decoder) {
1463 DecodeStatus S = MCDisassembler::Success;
1465 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1466 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1467 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1470 switch (Inst.getOpcode()) {
1472 Inst.setOpcode(ARM::RFEDA);
1474 case ARM::LDMDA_UPD:
1475 Inst.setOpcode(ARM::RFEDA_UPD);
1478 Inst.setOpcode(ARM::RFEDB);
1480 case ARM::LDMDB_UPD:
1481 Inst.setOpcode(ARM::RFEDB_UPD);
1484 Inst.setOpcode(ARM::RFEIA);
1486 case ARM::LDMIA_UPD:
1487 Inst.setOpcode(ARM::RFEIA_UPD);
1490 Inst.setOpcode(ARM::RFEIB);
1492 case ARM::LDMIB_UPD:
1493 Inst.setOpcode(ARM::RFEIB_UPD);
1496 Inst.setOpcode(ARM::SRSDA);
1498 case ARM::STMDA_UPD:
1499 Inst.setOpcode(ARM::SRSDA_UPD);
1502 Inst.setOpcode(ARM::SRSDB);
1504 case ARM::STMDB_UPD:
1505 Inst.setOpcode(ARM::SRSDB_UPD);
1508 Inst.setOpcode(ARM::SRSIA);
1510 case ARM::STMIA_UPD:
1511 Inst.setOpcode(ARM::SRSIA_UPD);
1514 Inst.setOpcode(ARM::SRSIB);
1516 case ARM::STMIB_UPD:
1517 Inst.setOpcode(ARM::SRSIB_UPD);
1520 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1523 // For stores (which become SRS's, the only operand is the mode.
1524 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1526 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1530 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1533 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1534 return MCDisassembler::Fail;
1535 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1536 return MCDisassembler::Fail; // Tied
1537 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1538 return MCDisassembler::Fail;
1539 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1540 return MCDisassembler::Fail;
1545 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1546 uint64_t Address, const void *Decoder) {
1547 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1548 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1549 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1550 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1552 DecodeStatus S = MCDisassembler::Success;
1554 // imod == '01' --> UNPREDICTABLE
1555 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1556 // return failure here. The '01' imod value is unprintable, so there's
1557 // nothing useful we could do even if we returned UNPREDICTABLE.
1559 if (imod == 1) return MCDisassembler::Fail;
1562 Inst.setOpcode(ARM::CPS3p);
1563 Inst.addOperand(MCOperand::CreateImm(imod));
1564 Inst.addOperand(MCOperand::CreateImm(iflags));
1565 Inst.addOperand(MCOperand::CreateImm(mode));
1566 } else if (imod && !M) {
1567 Inst.setOpcode(ARM::CPS2p);
1568 Inst.addOperand(MCOperand::CreateImm(imod));
1569 Inst.addOperand(MCOperand::CreateImm(iflags));
1570 if (mode) S = MCDisassembler::SoftFail;
1571 } else if (!imod && M) {
1572 Inst.setOpcode(ARM::CPS1p);
1573 Inst.addOperand(MCOperand::CreateImm(mode));
1574 if (iflags) S = MCDisassembler::SoftFail;
1576 // imod == '00' && M == '0' --> UNPREDICTABLE
1577 Inst.setOpcode(ARM::CPS1p);
1578 Inst.addOperand(MCOperand::CreateImm(mode));
1579 S = MCDisassembler::SoftFail;
1585 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1586 uint64_t Address, const void *Decoder) {
1587 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1588 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1589 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1590 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1592 DecodeStatus S = MCDisassembler::Success;
1594 // imod == '01' --> UNPREDICTABLE
1595 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1596 // return failure here. The '01' imod value is unprintable, so there's
1597 // nothing useful we could do even if we returned UNPREDICTABLE.
1599 if (imod == 1) return MCDisassembler::Fail;
1602 Inst.setOpcode(ARM::t2CPS3p);
1603 Inst.addOperand(MCOperand::CreateImm(imod));
1604 Inst.addOperand(MCOperand::CreateImm(iflags));
1605 Inst.addOperand(MCOperand::CreateImm(mode));
1606 } else if (imod && !M) {
1607 Inst.setOpcode(ARM::t2CPS2p);
1608 Inst.addOperand(MCOperand::CreateImm(imod));
1609 Inst.addOperand(MCOperand::CreateImm(iflags));
1610 if (mode) S = MCDisassembler::SoftFail;
1611 } else if (!imod && M) {
1612 Inst.setOpcode(ARM::t2CPS1p);
1613 Inst.addOperand(MCOperand::CreateImm(mode));
1614 if (iflags) S = MCDisassembler::SoftFail;
1616 // imod == '00' && M == '0' --> UNPREDICTABLE
1617 Inst.setOpcode(ARM::t2CPS1p);
1618 Inst.addOperand(MCOperand::CreateImm(mode));
1619 S = MCDisassembler::SoftFail;
1626 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1627 uint64_t Address, const void *Decoder) {
1628 DecodeStatus S = MCDisassembler::Success;
1630 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1631 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1632 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1633 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1634 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1637 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1639 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1640 return MCDisassembler::Fail;
1641 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1642 return MCDisassembler::Fail;
1643 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1644 return MCDisassembler::Fail;
1645 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1646 return MCDisassembler::Fail;
1648 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1649 return MCDisassembler::Fail;
1654 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1655 uint64_t Address, const void *Decoder) {
1656 DecodeStatus S = MCDisassembler::Success;
1658 unsigned add = fieldFromInstruction32(Val, 12, 1);
1659 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1660 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1662 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1663 return MCDisassembler::Fail;
1665 if (!add) imm *= -1;
1666 if (imm == 0 && !add) imm = INT32_MIN;
1667 Inst.addOperand(MCOperand::CreateImm(imm));
1672 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1673 uint64_t Address, const void *Decoder) {
1674 DecodeStatus S = MCDisassembler::Success;
1676 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1677 unsigned U = fieldFromInstruction32(Val, 8, 1);
1678 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1680 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1681 return MCDisassembler::Fail;
1684 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1686 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1691 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1692 uint64_t Address, const void *Decoder) {
1693 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1697 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1698 uint64_t Address, const void *Decoder) {
1699 DecodeStatus S = MCDisassembler::Success;
1701 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1702 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1705 Inst.setOpcode(ARM::BLXi);
1706 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1707 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1711 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1712 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1713 return MCDisassembler::Fail;
1719 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1720 uint64_t Address, const void *Decoder) {
1721 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1722 return MCDisassembler::Success;
1725 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1726 uint64_t Address, const void *Decoder) {
1727 DecodeStatus S = MCDisassembler::Success;
1729 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1730 unsigned align = fieldFromInstruction32(Val, 4, 2);
1732 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1733 return MCDisassembler::Fail;
1735 Inst.addOperand(MCOperand::CreateImm(0));
1737 Inst.addOperand(MCOperand::CreateImm(4 << align));
1742 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1743 uint64_t Address, const void *Decoder) {
1744 DecodeStatus S = MCDisassembler::Success;
1746 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1747 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1748 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1749 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1750 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1751 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1753 // First output register
1754 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1755 return MCDisassembler::Fail;
1757 // Second output register
1758 switch (Inst.getOpcode()) {
1763 case ARM::VLD1q8_UPD:
1764 case ARM::VLD1q16_UPD:
1765 case ARM::VLD1q32_UPD:
1766 case ARM::VLD1q64_UPD:
1771 case ARM::VLD1d8T_UPD:
1772 case ARM::VLD1d16T_UPD:
1773 case ARM::VLD1d32T_UPD:
1774 case ARM::VLD1d64T_UPD:
1779 case ARM::VLD1d8Q_UPD:
1780 case ARM::VLD1d16Q_UPD:
1781 case ARM::VLD1d32Q_UPD:
1782 case ARM::VLD1d64Q_UPD:
1786 case ARM::VLD2d8_UPD:
1787 case ARM::VLD2d16_UPD:
1788 case ARM::VLD2d32_UPD:
1792 case ARM::VLD2q8_UPD:
1793 case ARM::VLD2q16_UPD:
1794 case ARM::VLD2q32_UPD:
1798 case ARM::VLD3d8_UPD:
1799 case ARM::VLD3d16_UPD:
1800 case ARM::VLD3d32_UPD:
1804 case ARM::VLD4d8_UPD:
1805 case ARM::VLD4d16_UPD:
1806 case ARM::VLD4d32_UPD:
1807 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
1808 return MCDisassembler::Fail;
1813 case ARM::VLD2b8_UPD:
1814 case ARM::VLD2b16_UPD:
1815 case ARM::VLD2b32_UPD:
1819 case ARM::VLD3q8_UPD:
1820 case ARM::VLD3q16_UPD:
1821 case ARM::VLD3q32_UPD:
1825 case ARM::VLD4q8_UPD:
1826 case ARM::VLD4q16_UPD:
1827 case ARM::VLD4q32_UPD:
1828 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1829 return MCDisassembler::Fail;
1834 // Third output register
1835 switch(Inst.getOpcode()) {
1840 case ARM::VLD1d8T_UPD:
1841 case ARM::VLD1d16T_UPD:
1842 case ARM::VLD1d32T_UPD:
1843 case ARM::VLD1d64T_UPD:
1848 case ARM::VLD1d8Q_UPD:
1849 case ARM::VLD1d16Q_UPD:
1850 case ARM::VLD1d32Q_UPD:
1851 case ARM::VLD1d64Q_UPD:
1855 case ARM::VLD2q8_UPD:
1856 case ARM::VLD2q16_UPD:
1857 case ARM::VLD2q32_UPD:
1861 case ARM::VLD3d8_UPD:
1862 case ARM::VLD3d16_UPD:
1863 case ARM::VLD3d32_UPD:
1867 case ARM::VLD4d8_UPD:
1868 case ARM::VLD4d16_UPD:
1869 case ARM::VLD4d32_UPD:
1870 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1871 return MCDisassembler::Fail;
1876 case ARM::VLD3q8_UPD:
1877 case ARM::VLD3q16_UPD:
1878 case ARM::VLD3q32_UPD:
1882 case ARM::VLD4q8_UPD:
1883 case ARM::VLD4q16_UPD:
1884 case ARM::VLD4q32_UPD:
1885 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
1886 return MCDisassembler::Fail;
1892 // Fourth output register
1893 switch (Inst.getOpcode()) {
1898 case ARM::VLD1d8Q_UPD:
1899 case ARM::VLD1d16Q_UPD:
1900 case ARM::VLD1d32Q_UPD:
1901 case ARM::VLD1d64Q_UPD:
1905 case ARM::VLD2q8_UPD:
1906 case ARM::VLD2q16_UPD:
1907 case ARM::VLD2q32_UPD:
1911 case ARM::VLD4d8_UPD:
1912 case ARM::VLD4d16_UPD:
1913 case ARM::VLD4d32_UPD:
1914 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
1915 return MCDisassembler::Fail;
1920 case ARM::VLD4q8_UPD:
1921 case ARM::VLD4q16_UPD:
1922 case ARM::VLD4q32_UPD:
1923 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
1924 return MCDisassembler::Fail;
1930 // Writeback operand
1931 switch (Inst.getOpcode()) {
1932 case ARM::VLD1d8_UPD:
1933 case ARM::VLD1d16_UPD:
1934 case ARM::VLD1d32_UPD:
1935 case ARM::VLD1d64_UPD:
1936 case ARM::VLD1q8_UPD:
1937 case ARM::VLD1q16_UPD:
1938 case ARM::VLD1q32_UPD:
1939 case ARM::VLD1q64_UPD:
1940 case ARM::VLD1d8T_UPD:
1941 case ARM::VLD1d16T_UPD:
1942 case ARM::VLD1d32T_UPD:
1943 case ARM::VLD1d64T_UPD:
1944 case ARM::VLD1d8Q_UPD:
1945 case ARM::VLD1d16Q_UPD:
1946 case ARM::VLD1d32Q_UPD:
1947 case ARM::VLD1d64Q_UPD:
1948 case ARM::VLD2d8_UPD:
1949 case ARM::VLD2d16_UPD:
1950 case ARM::VLD2d32_UPD:
1951 case ARM::VLD2q8_UPD:
1952 case ARM::VLD2q16_UPD:
1953 case ARM::VLD2q32_UPD:
1954 case ARM::VLD2b8_UPD:
1955 case ARM::VLD2b16_UPD:
1956 case ARM::VLD2b32_UPD:
1957 case ARM::VLD3d8_UPD:
1958 case ARM::VLD3d16_UPD:
1959 case ARM::VLD3d32_UPD:
1960 case ARM::VLD3q8_UPD:
1961 case ARM::VLD3q16_UPD:
1962 case ARM::VLD3q32_UPD:
1963 case ARM::VLD4d8_UPD:
1964 case ARM::VLD4d16_UPD:
1965 case ARM::VLD4d32_UPD:
1966 case ARM::VLD4q8_UPD:
1967 case ARM::VLD4q16_UPD:
1968 case ARM::VLD4q32_UPD:
1969 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
1970 return MCDisassembler::Fail;
1976 // AddrMode6 Base (register+alignment)
1977 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
1978 return MCDisassembler::Fail;
1980 // AddrMode6 Offset (register)
1982 Inst.addOperand(MCOperand::CreateReg(0));
1983 else if (Rm != 0xF) {
1984 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1985 return MCDisassembler::Fail;
1991 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
1992 uint64_t Address, const void *Decoder) {
1993 DecodeStatus S = MCDisassembler::Success;
1995 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1996 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1997 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1998 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1999 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
2000 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2002 // Writeback Operand
2003 switch (Inst.getOpcode()) {
2004 case ARM::VST1d8_UPD:
2005 case ARM::VST1d16_UPD:
2006 case ARM::VST1d32_UPD:
2007 case ARM::VST1d64_UPD:
2008 case ARM::VST1q8_UPD:
2009 case ARM::VST1q16_UPD:
2010 case ARM::VST1q32_UPD:
2011 case ARM::VST1q64_UPD:
2012 case ARM::VST1d8T_UPD:
2013 case ARM::VST1d16T_UPD:
2014 case ARM::VST1d32T_UPD:
2015 case ARM::VST1d64T_UPD:
2016 case ARM::VST1d8Q_UPD:
2017 case ARM::VST1d16Q_UPD:
2018 case ARM::VST1d32Q_UPD:
2019 case ARM::VST1d64Q_UPD:
2020 case ARM::VST2d8_UPD:
2021 case ARM::VST2d16_UPD:
2022 case ARM::VST2d32_UPD:
2023 case ARM::VST2q8_UPD:
2024 case ARM::VST2q16_UPD:
2025 case ARM::VST2q32_UPD:
2026 case ARM::VST2b8_UPD:
2027 case ARM::VST2b16_UPD:
2028 case ARM::VST2b32_UPD:
2029 case ARM::VST3d8_UPD:
2030 case ARM::VST3d16_UPD:
2031 case ARM::VST3d32_UPD:
2032 case ARM::VST3q8_UPD:
2033 case ARM::VST3q16_UPD:
2034 case ARM::VST3q32_UPD:
2035 case ARM::VST4d8_UPD:
2036 case ARM::VST4d16_UPD:
2037 case ARM::VST4d32_UPD:
2038 case ARM::VST4q8_UPD:
2039 case ARM::VST4q16_UPD:
2040 case ARM::VST4q32_UPD:
2041 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2042 return MCDisassembler::Fail;
2048 // AddrMode6 Base (register+alignment)
2049 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2050 return MCDisassembler::Fail;
2052 // AddrMode6 Offset (register)
2054 Inst.addOperand(MCOperand::CreateReg(0));
2055 else if (Rm != 0xF) {
2056 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2057 return MCDisassembler::Fail;
2060 // First input register
2061 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2062 return MCDisassembler::Fail;
2064 // Second input register
2065 switch (Inst.getOpcode()) {
2070 case ARM::VST1q8_UPD:
2071 case ARM::VST1q16_UPD:
2072 case ARM::VST1q32_UPD:
2073 case ARM::VST1q64_UPD:
2078 case ARM::VST1d8T_UPD:
2079 case ARM::VST1d16T_UPD:
2080 case ARM::VST1d32T_UPD:
2081 case ARM::VST1d64T_UPD:
2086 case ARM::VST1d8Q_UPD:
2087 case ARM::VST1d16Q_UPD:
2088 case ARM::VST1d32Q_UPD:
2089 case ARM::VST1d64Q_UPD:
2093 case ARM::VST2d8_UPD:
2094 case ARM::VST2d16_UPD:
2095 case ARM::VST2d32_UPD:
2099 case ARM::VST2q8_UPD:
2100 case ARM::VST2q16_UPD:
2101 case ARM::VST2q32_UPD:
2105 case ARM::VST3d8_UPD:
2106 case ARM::VST3d16_UPD:
2107 case ARM::VST3d32_UPD:
2111 case ARM::VST4d8_UPD:
2112 case ARM::VST4d16_UPD:
2113 case ARM::VST4d32_UPD:
2114 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2115 return MCDisassembler::Fail;
2120 case ARM::VST2b8_UPD:
2121 case ARM::VST2b16_UPD:
2122 case ARM::VST2b32_UPD:
2126 case ARM::VST3q8_UPD:
2127 case ARM::VST3q16_UPD:
2128 case ARM::VST3q32_UPD:
2132 case ARM::VST4q8_UPD:
2133 case ARM::VST4q16_UPD:
2134 case ARM::VST4q32_UPD:
2135 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2136 return MCDisassembler::Fail;
2142 // Third input register
2143 switch (Inst.getOpcode()) {
2148 case ARM::VST1d8T_UPD:
2149 case ARM::VST1d16T_UPD:
2150 case ARM::VST1d32T_UPD:
2151 case ARM::VST1d64T_UPD:
2156 case ARM::VST1d8Q_UPD:
2157 case ARM::VST1d16Q_UPD:
2158 case ARM::VST1d32Q_UPD:
2159 case ARM::VST1d64Q_UPD:
2163 case ARM::VST2q8_UPD:
2164 case ARM::VST2q16_UPD:
2165 case ARM::VST2q32_UPD:
2169 case ARM::VST3d8_UPD:
2170 case ARM::VST3d16_UPD:
2171 case ARM::VST3d32_UPD:
2175 case ARM::VST4d8_UPD:
2176 case ARM::VST4d16_UPD:
2177 case ARM::VST4d32_UPD:
2178 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2179 return MCDisassembler::Fail;
2184 case ARM::VST3q8_UPD:
2185 case ARM::VST3q16_UPD:
2186 case ARM::VST3q32_UPD:
2190 case ARM::VST4q8_UPD:
2191 case ARM::VST4q16_UPD:
2192 case ARM::VST4q32_UPD:
2193 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2194 return MCDisassembler::Fail;
2200 // Fourth input register
2201 switch (Inst.getOpcode()) {
2206 case ARM::VST1d8Q_UPD:
2207 case ARM::VST1d16Q_UPD:
2208 case ARM::VST1d32Q_UPD:
2209 case ARM::VST1d64Q_UPD:
2213 case ARM::VST2q8_UPD:
2214 case ARM::VST2q16_UPD:
2215 case ARM::VST2q32_UPD:
2219 case ARM::VST4d8_UPD:
2220 case ARM::VST4d16_UPD:
2221 case ARM::VST4d32_UPD:
2222 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2223 return MCDisassembler::Fail;
2228 case ARM::VST4q8_UPD:
2229 case ARM::VST4q16_UPD:
2230 case ARM::VST4q32_UPD:
2231 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2232 return MCDisassembler::Fail;
2241 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2242 uint64_t Address, const void *Decoder) {
2243 DecodeStatus S = MCDisassembler::Success;
2245 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2246 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2247 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2248 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2249 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2250 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2251 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
2253 align *= (1 << size);
2255 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2256 return MCDisassembler::Fail;
2258 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2259 return MCDisassembler::Fail;
2262 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2263 return MCDisassembler::Fail;
2266 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2267 return MCDisassembler::Fail;
2268 Inst.addOperand(MCOperand::CreateImm(align));
2271 Inst.addOperand(MCOperand::CreateReg(0));
2272 else if (Rm != 0xF) {
2273 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2274 return MCDisassembler::Fail;
2280 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2281 uint64_t Address, const void *Decoder) {
2282 DecodeStatus S = MCDisassembler::Success;
2284 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2285 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2286 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2287 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2288 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2289 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2290 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2293 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2294 return MCDisassembler::Fail;
2295 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2296 return MCDisassembler::Fail;
2298 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2299 return MCDisassembler::Fail;
2302 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2303 return MCDisassembler::Fail;
2304 Inst.addOperand(MCOperand::CreateImm(align));
2307 Inst.addOperand(MCOperand::CreateReg(0));
2308 else if (Rm != 0xF) {
2309 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2310 return MCDisassembler::Fail;
2316 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2317 uint64_t Address, const void *Decoder) {
2318 DecodeStatus S = MCDisassembler::Success;
2320 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2321 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2322 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2323 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2324 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2326 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2327 return MCDisassembler::Fail;
2328 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2329 return MCDisassembler::Fail;
2330 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2331 return MCDisassembler::Fail;
2333 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2334 return MCDisassembler::Fail;
2337 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2338 return MCDisassembler::Fail;
2339 Inst.addOperand(MCOperand::CreateImm(0));
2342 Inst.addOperand(MCOperand::CreateReg(0));
2343 else if (Rm != 0xF) {
2344 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2345 return MCDisassembler::Fail;
2351 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2352 uint64_t Address, const void *Decoder) {
2353 DecodeStatus S = MCDisassembler::Success;
2355 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2356 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2357 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2358 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2359 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2360 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2361 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2376 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2377 return MCDisassembler::Fail;
2378 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2379 return MCDisassembler::Fail;
2380 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2381 return MCDisassembler::Fail;
2382 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2383 return MCDisassembler::Fail;
2385 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2386 return MCDisassembler::Fail;
2389 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2390 return MCDisassembler::Fail;
2391 Inst.addOperand(MCOperand::CreateImm(align));
2394 Inst.addOperand(MCOperand::CreateReg(0));
2395 else if (Rm != 0xF) {
2396 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2397 return MCDisassembler::Fail;
2404 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2405 uint64_t Address, const void *Decoder) {
2406 DecodeStatus S = MCDisassembler::Success;
2408 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2409 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2410 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2411 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2412 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2413 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2414 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2415 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2418 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2419 return MCDisassembler::Fail;
2421 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2422 return MCDisassembler::Fail;
2425 Inst.addOperand(MCOperand::CreateImm(imm));
2427 switch (Inst.getOpcode()) {
2428 case ARM::VORRiv4i16:
2429 case ARM::VORRiv2i32:
2430 case ARM::VBICiv4i16:
2431 case ARM::VBICiv2i32:
2432 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2433 return MCDisassembler::Fail;
2435 case ARM::VORRiv8i16:
2436 case ARM::VORRiv4i32:
2437 case ARM::VBICiv8i16:
2438 case ARM::VBICiv4i32:
2439 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2440 return MCDisassembler::Fail;
2449 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2450 uint64_t Address, const void *Decoder) {
2451 DecodeStatus S = MCDisassembler::Success;
2453 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2454 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2455 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2456 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2457 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2459 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2460 return MCDisassembler::Fail;
2461 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2462 return MCDisassembler::Fail;
2463 Inst.addOperand(MCOperand::CreateImm(8 << size));
2468 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2469 uint64_t Address, const void *Decoder) {
2470 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2471 return MCDisassembler::Success;
2474 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2475 uint64_t Address, const void *Decoder) {
2476 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2477 return MCDisassembler::Success;
2480 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2481 uint64_t Address, const void *Decoder) {
2482 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2483 return MCDisassembler::Success;
2486 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2487 uint64_t Address, const void *Decoder) {
2488 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2489 return MCDisassembler::Success;
2492 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2493 uint64_t Address, const void *Decoder) {
2494 DecodeStatus S = MCDisassembler::Success;
2496 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2497 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2498 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2499 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2500 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2501 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2502 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2503 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2505 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2506 return MCDisassembler::Fail;
2508 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2509 return MCDisassembler::Fail; // Writeback
2512 for (unsigned i = 0; i < length; ++i) {
2513 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)))
2514 return MCDisassembler::Fail;
2517 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2518 return MCDisassembler::Fail;
2523 static DecodeStatus DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
2524 uint64_t Address, const void *Decoder) {
2525 // The immediate needs to be a fully instantiated float. However, the
2526 // auto-generated decoder is only able to fill in some of the bits
2527 // necessary. For instance, the 'b' bit is replicated multiple times,
2528 // and is even present in inverted form in one bit. We do a little
2529 // binary parsing here to fill in those missing bits, and then
2530 // reinterpret it all as a float.
2536 fp_conv.integer = Val;
2537 uint32_t b = fieldFromInstruction32(Val, 25, 1);
2538 fp_conv.integer |= b << 26;
2539 fp_conv.integer |= b << 27;
2540 fp_conv.integer |= b << 28;
2541 fp_conv.integer |= b << 29;
2542 fp_conv.integer |= (~b & 0x1) << 30;
2544 Inst.addOperand(MCOperand::CreateFPImm(fp_conv.fp));
2545 return MCDisassembler::Success;
2548 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2549 uint64_t Address, const void *Decoder) {
2550 DecodeStatus S = MCDisassembler::Success;
2552 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2553 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2555 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2556 return MCDisassembler::Fail;
2558 switch(Inst.getOpcode()) {
2560 return MCDisassembler::Fail;
2562 break; // tADR does not explicitly represent the PC as an operand.
2564 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2568 Inst.addOperand(MCOperand::CreateImm(imm));
2572 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2573 uint64_t Address, const void *Decoder) {
2574 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2575 return MCDisassembler::Success;
2578 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2579 uint64_t Address, const void *Decoder) {
2580 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2581 return MCDisassembler::Success;
2584 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2585 uint64_t Address, const void *Decoder) {
2586 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2587 return MCDisassembler::Success;
2590 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2591 uint64_t Address, const void *Decoder) {
2592 DecodeStatus S = MCDisassembler::Success;
2594 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2595 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2597 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2598 return MCDisassembler::Fail;
2599 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2600 return MCDisassembler::Fail;
2605 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2606 uint64_t Address, const void *Decoder) {
2607 DecodeStatus S = MCDisassembler::Success;
2609 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2610 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2612 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2613 return MCDisassembler::Fail;
2614 Inst.addOperand(MCOperand::CreateImm(imm));
2619 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2620 uint64_t Address, const void *Decoder) {
2621 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2623 return MCDisassembler::Success;
2626 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2627 uint64_t Address, const void *Decoder) {
2628 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2629 Inst.addOperand(MCOperand::CreateImm(Val));
2631 return MCDisassembler::Success;
2634 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2635 uint64_t Address, const void *Decoder) {
2636 DecodeStatus S = MCDisassembler::Success;
2638 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2639 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2640 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2642 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2643 return MCDisassembler::Fail;
2644 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2645 return MCDisassembler::Fail;
2646 Inst.addOperand(MCOperand::CreateImm(imm));
2651 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2652 uint64_t Address, const void *Decoder) {
2653 DecodeStatus S = MCDisassembler::Success;
2655 switch (Inst.getOpcode()) {
2661 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2662 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2663 return MCDisassembler::Fail;
2667 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2669 switch (Inst.getOpcode()) {
2671 Inst.setOpcode(ARM::t2LDRBpci);
2674 Inst.setOpcode(ARM::t2LDRHpci);
2677 Inst.setOpcode(ARM::t2LDRSHpci);
2680 Inst.setOpcode(ARM::t2LDRSBpci);
2683 Inst.setOpcode(ARM::t2PLDi12);
2684 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2687 return MCDisassembler::Fail;
2690 int imm = fieldFromInstruction32(Insn, 0, 12);
2691 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2692 Inst.addOperand(MCOperand::CreateImm(imm));
2697 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2698 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2699 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2700 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2701 return MCDisassembler::Fail;
2706 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2707 uint64_t Address, const void *Decoder) {
2708 int imm = Val & 0xFF;
2709 if (!(Val & 0x100)) imm *= -1;
2710 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2712 return MCDisassembler::Success;
2715 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2716 uint64_t Address, const void *Decoder) {
2717 DecodeStatus S = MCDisassembler::Success;
2719 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2720 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2722 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2723 return MCDisassembler::Fail;
2724 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2725 return MCDisassembler::Fail;
2730 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
2731 uint64_t Address, const void *Decoder) {
2732 DecodeStatus S = MCDisassembler::Success;
2734 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
2735 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2737 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2738 return MCDisassembler::Fail;
2740 Inst.addOperand(MCOperand::CreateImm(imm));
2745 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2746 uint64_t Address, const void *Decoder) {
2747 int imm = Val & 0xFF;
2750 else if (!(Val & 0x100))
2752 Inst.addOperand(MCOperand::CreateImm(imm));
2754 return MCDisassembler::Success;
2758 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2759 uint64_t Address, const void *Decoder) {
2760 DecodeStatus S = MCDisassembler::Success;
2762 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2763 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2765 // Some instructions always use an additive offset.
2766 switch (Inst.getOpcode()) {
2781 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2782 return MCDisassembler::Fail;
2783 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2784 return MCDisassembler::Fail;
2789 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn,
2790 uint64_t Address, const void *Decoder) {
2791 DecodeStatus S = MCDisassembler::Success;
2793 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2794 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2795 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
2796 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
2798 unsigned load = fieldFromInstruction32(Insn, 20, 1);
2801 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2802 return MCDisassembler::Fail;
2805 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2806 return MCDisassembler::Fail;
2809 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2810 return MCDisassembler::Fail;
2813 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
2814 return MCDisassembler::Fail;
2819 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2820 uint64_t Address, const void *Decoder) {
2821 DecodeStatus S = MCDisassembler::Success;
2823 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2824 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2826 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2827 return MCDisassembler::Fail;
2828 Inst.addOperand(MCOperand::CreateImm(imm));
2834 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2835 uint64_t Address, const void *Decoder) {
2836 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2838 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2839 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2840 Inst.addOperand(MCOperand::CreateImm(imm));
2842 return MCDisassembler::Success;
2845 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2846 uint64_t Address, const void *Decoder) {
2847 DecodeStatus S = MCDisassembler::Success;
2849 if (Inst.getOpcode() == ARM::tADDrSP) {
2850 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2851 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2853 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2854 return MCDisassembler::Fail;
2855 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2856 return MCDisassembler::Fail;
2857 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2858 } else if (Inst.getOpcode() == ARM::tADDspr) {
2859 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2861 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2862 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2863 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2864 return MCDisassembler::Fail;
2870 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2871 uint64_t Address, const void *Decoder) {
2872 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2873 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2875 Inst.addOperand(MCOperand::CreateImm(imod));
2876 Inst.addOperand(MCOperand::CreateImm(flags));
2878 return MCDisassembler::Success;
2881 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
2882 uint64_t Address, const void *Decoder) {
2883 DecodeStatus S = MCDisassembler::Success;
2884 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2885 unsigned add = fieldFromInstruction32(Insn, 4, 1);
2887 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2888 return MCDisassembler::Fail;
2889 Inst.addOperand(MCOperand::CreateImm(add));
2894 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
2895 uint64_t Address, const void *Decoder) {
2896 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2897 return MCDisassembler::Success;
2900 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
2901 uint64_t Address, const void *Decoder) {
2902 if (Val == 0xA || Val == 0xB)
2903 return MCDisassembler::Fail;
2905 Inst.addOperand(MCOperand::CreateImm(Val));
2906 return MCDisassembler::Success;
2910 DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Insn,
2911 uint64_t Address, const void *Decoder) {
2912 DecodeStatus S = MCDisassembler::Success;
2914 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2915 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2917 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
2918 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2919 return MCDisassembler::Fail;
2920 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2921 return MCDisassembler::Fail;
2926 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
2927 uint64_t Address, const void *Decoder) {
2928 DecodeStatus S = MCDisassembler::Success;
2930 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2931 if (pred == 0xE || pred == 0xF) {
2932 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
2935 return MCDisassembler::Fail;
2937 Inst.setOpcode(ARM::t2DSB);
2940 Inst.setOpcode(ARM::t2DMB);
2943 Inst.setOpcode(ARM::t2ISB);
2947 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2948 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
2951 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
2952 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
2953 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
2954 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
2955 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
2957 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
2958 return MCDisassembler::Fail;
2959 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2960 return MCDisassembler::Fail;
2965 // Decode a shifted immediate operand. These basically consist
2966 // of an 8-bit value, and a 4-bit directive that specifies either
2967 // a splat operation or a rotation.
2968 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
2969 uint64_t Address, const void *Decoder) {
2970 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
2972 unsigned byte = fieldFromInstruction32(Val, 8, 2);
2973 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2976 Inst.addOperand(MCOperand::CreateImm(imm));
2979 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
2982 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
2985 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
2990 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
2991 unsigned rot = fieldFromInstruction32(Val, 7, 5);
2992 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
2993 Inst.addOperand(MCOperand::CreateImm(imm));
2996 return MCDisassembler::Success;
3000 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
3001 uint64_t Address, const void *Decoder){
3002 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3003 return MCDisassembler::Success;
3006 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
3007 uint64_t Address, const void *Decoder){
3008 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3009 return MCDisassembler::Success;
3012 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
3013 uint64_t Address, const void *Decoder) {
3016 return MCDisassembler::Fail;
3028 Inst.addOperand(MCOperand::CreateImm(Val));
3029 return MCDisassembler::Success;
3032 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
3033 uint64_t Address, const void *Decoder) {
3034 if (!Val) return MCDisassembler::Fail;
3035 Inst.addOperand(MCOperand::CreateImm(Val));
3036 return MCDisassembler::Success;
3039 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
3040 uint64_t Address, const void *Decoder) {
3041 DecodeStatus S = MCDisassembler::Success;
3043 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3044 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3045 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3047 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3049 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3050 return MCDisassembler::Fail;
3051 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3052 return MCDisassembler::Fail;
3053 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3054 return MCDisassembler::Fail;
3055 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3056 return MCDisassembler::Fail;
3062 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
3063 uint64_t Address, const void *Decoder){
3064 DecodeStatus S = MCDisassembler::Success;
3066 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3067 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3068 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3069 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3071 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3072 return MCDisassembler::Fail;
3074 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3075 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3077 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3078 return MCDisassembler::Fail;
3079 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3080 return MCDisassembler::Fail;
3081 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3082 return MCDisassembler::Fail;
3083 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3084 return MCDisassembler::Fail;
3089 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
3090 uint64_t Address, const void *Decoder) {
3091 DecodeStatus S = MCDisassembler::Success;
3093 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3094 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3095 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3096 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3097 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3098 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3100 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3102 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3103 return MCDisassembler::Fail;
3104 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3105 return MCDisassembler::Fail;
3106 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3107 return MCDisassembler::Fail;
3108 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3109 return MCDisassembler::Fail;
3114 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
3115 uint64_t Address, const void *Decoder) {
3116 DecodeStatus S = MCDisassembler::Success;
3118 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3119 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3120 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3121 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3122 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3123 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3124 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3126 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3127 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3129 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3130 return MCDisassembler::Fail;
3131 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3132 return MCDisassembler::Fail;
3133 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3134 return MCDisassembler::Fail;
3135 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3136 return MCDisassembler::Fail;
3142 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3143 uint64_t Address, const void *Decoder) {
3144 DecodeStatus S = MCDisassembler::Success;
3146 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3147 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3148 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3149 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3150 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3151 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3153 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3155 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3156 return MCDisassembler::Fail;
3157 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3158 return MCDisassembler::Fail;
3159 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3160 return MCDisassembler::Fail;
3161 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3162 return MCDisassembler::Fail;
3167 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3168 uint64_t Address, const void *Decoder) {
3169 DecodeStatus S = MCDisassembler::Success;
3171 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3172 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3173 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3174 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3175 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3176 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3178 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3180 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3181 return MCDisassembler::Fail;
3182 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3183 return MCDisassembler::Fail;
3184 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3185 return MCDisassembler::Fail;
3186 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3187 return MCDisassembler::Fail;
3192 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3193 uint64_t Address, const void *Decoder) {
3194 DecodeStatus S = MCDisassembler::Success;
3196 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3197 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3198 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3199 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3200 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3206 return MCDisassembler::Fail;
3208 if (fieldFromInstruction32(Insn, 4, 1))
3209 return MCDisassembler::Fail; // UNDEFINED
3210 index = fieldFromInstruction32(Insn, 5, 3);
3213 if (fieldFromInstruction32(Insn, 5, 1))
3214 return MCDisassembler::Fail; // UNDEFINED
3215 index = fieldFromInstruction32(Insn, 6, 2);
3216 if (fieldFromInstruction32(Insn, 4, 1))
3220 if (fieldFromInstruction32(Insn, 6, 1))
3221 return MCDisassembler::Fail; // UNDEFINED
3222 index = fieldFromInstruction32(Insn, 7, 1);
3223 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3227 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3228 return MCDisassembler::Fail;
3229 if (Rm != 0xF) { // Writeback
3230 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3231 return MCDisassembler::Fail;
3233 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3234 return MCDisassembler::Fail;
3235 Inst.addOperand(MCOperand::CreateImm(align));
3238 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3239 return MCDisassembler::Fail;
3241 Inst.addOperand(MCOperand::CreateReg(0));
3244 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3245 return MCDisassembler::Fail;
3246 Inst.addOperand(MCOperand::CreateImm(index));
3251 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3252 uint64_t Address, const void *Decoder) {
3253 DecodeStatus S = MCDisassembler::Success;
3255 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3256 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3257 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3258 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3259 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3265 return MCDisassembler::Fail;
3267 if (fieldFromInstruction32(Insn, 4, 1))
3268 return MCDisassembler::Fail; // UNDEFINED
3269 index = fieldFromInstruction32(Insn, 5, 3);
3272 if (fieldFromInstruction32(Insn, 5, 1))
3273 return MCDisassembler::Fail; // UNDEFINED
3274 index = fieldFromInstruction32(Insn, 6, 2);
3275 if (fieldFromInstruction32(Insn, 4, 1))
3279 if (fieldFromInstruction32(Insn, 6, 1))
3280 return MCDisassembler::Fail; // UNDEFINED
3281 index = fieldFromInstruction32(Insn, 7, 1);
3282 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3286 if (Rm != 0xF) { // Writeback
3287 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3288 return MCDisassembler::Fail;
3290 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3291 return MCDisassembler::Fail;
3292 Inst.addOperand(MCOperand::CreateImm(align));
3295 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3296 return MCDisassembler::Fail;
3298 Inst.addOperand(MCOperand::CreateReg(0));
3301 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3302 return MCDisassembler::Fail;
3303 Inst.addOperand(MCOperand::CreateImm(index));
3309 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3310 uint64_t Address, const void *Decoder) {
3311 DecodeStatus S = MCDisassembler::Success;
3313 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3314 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3315 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3316 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3317 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3324 return MCDisassembler::Fail;
3326 index = fieldFromInstruction32(Insn, 5, 3);
3327 if (fieldFromInstruction32(Insn, 4, 1))
3331 index = fieldFromInstruction32(Insn, 6, 2);
3332 if (fieldFromInstruction32(Insn, 4, 1))
3334 if (fieldFromInstruction32(Insn, 5, 1))
3338 if (fieldFromInstruction32(Insn, 5, 1))
3339 return MCDisassembler::Fail; // UNDEFINED
3340 index = fieldFromInstruction32(Insn, 7, 1);
3341 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3343 if (fieldFromInstruction32(Insn, 6, 1))
3348 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3349 return MCDisassembler::Fail;
3350 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3351 return MCDisassembler::Fail;
3352 if (Rm != 0xF) { // Writeback
3353 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3354 return MCDisassembler::Fail;
3356 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3357 return MCDisassembler::Fail;
3358 Inst.addOperand(MCOperand::CreateImm(align));
3361 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3362 return MCDisassembler::Fail;
3364 Inst.addOperand(MCOperand::CreateReg(0));
3367 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3368 return MCDisassembler::Fail;
3369 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3370 return MCDisassembler::Fail;
3371 Inst.addOperand(MCOperand::CreateImm(index));
3376 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3377 uint64_t Address, const void *Decoder) {
3378 DecodeStatus S = MCDisassembler::Success;
3380 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3381 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3382 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3383 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3384 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3391 return MCDisassembler::Fail;
3393 index = fieldFromInstruction32(Insn, 5, 3);
3394 if (fieldFromInstruction32(Insn, 4, 1))
3398 index = fieldFromInstruction32(Insn, 6, 2);
3399 if (fieldFromInstruction32(Insn, 4, 1))
3401 if (fieldFromInstruction32(Insn, 5, 1))
3405 if (fieldFromInstruction32(Insn, 5, 1))
3406 return MCDisassembler::Fail; // UNDEFINED
3407 index = fieldFromInstruction32(Insn, 7, 1);
3408 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3410 if (fieldFromInstruction32(Insn, 6, 1))
3415 if (Rm != 0xF) { // Writeback
3416 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3417 return MCDisassembler::Fail;
3419 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3420 return MCDisassembler::Fail;
3421 Inst.addOperand(MCOperand::CreateImm(align));
3424 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3425 return MCDisassembler::Fail;
3427 Inst.addOperand(MCOperand::CreateReg(0));
3430 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3431 return MCDisassembler::Fail;
3432 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3433 return MCDisassembler::Fail;
3434 Inst.addOperand(MCOperand::CreateImm(index));
3440 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3441 uint64_t Address, const void *Decoder) {
3442 DecodeStatus S = MCDisassembler::Success;
3444 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3445 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3446 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3447 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3448 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, 4, 1))
3463 return MCDisassembler::Fail; // UNDEFINED
3464 index = fieldFromInstruction32(Insn, 6, 2);
3465 if (fieldFromInstruction32(Insn, 5, 1))
3469 if (fieldFromInstruction32(Insn, 4, 2))
3470 return MCDisassembler::Fail; // UNDEFINED
3471 index = fieldFromInstruction32(Insn, 7, 1);
3472 if (fieldFromInstruction32(Insn, 6, 1))
3477 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3478 return MCDisassembler::Fail;
3479 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3480 return MCDisassembler::Fail;
3481 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3482 return MCDisassembler::Fail;
3484 if (Rm != 0xF) { // Writeback
3485 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3486 return MCDisassembler::Fail;
3488 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3489 return MCDisassembler::Fail;
3490 Inst.addOperand(MCOperand::CreateImm(align));
3493 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3494 return MCDisassembler::Fail;
3496 Inst.addOperand(MCOperand::CreateReg(0));
3499 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3500 return MCDisassembler::Fail;
3501 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3502 return MCDisassembler::Fail;
3503 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3504 return MCDisassembler::Fail;
3505 Inst.addOperand(MCOperand::CreateImm(index));
3510 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3511 uint64_t Address, const void *Decoder) {
3512 DecodeStatus S = MCDisassembler::Success;
3514 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3515 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3516 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3517 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3518 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3525 return MCDisassembler::Fail;
3527 if (fieldFromInstruction32(Insn, 4, 1))
3528 return MCDisassembler::Fail; // UNDEFINED
3529 index = fieldFromInstruction32(Insn, 5, 3);
3532 if (fieldFromInstruction32(Insn, 4, 1))
3533 return MCDisassembler::Fail; // UNDEFINED
3534 index = fieldFromInstruction32(Insn, 6, 2);
3535 if (fieldFromInstruction32(Insn, 5, 1))
3539 if (fieldFromInstruction32(Insn, 4, 2))
3540 return MCDisassembler::Fail; // UNDEFINED
3541 index = fieldFromInstruction32(Insn, 7, 1);
3542 if (fieldFromInstruction32(Insn, 6, 1))
3547 if (Rm != 0xF) { // Writeback
3548 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3549 return MCDisassembler::Fail;
3551 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3552 return MCDisassembler::Fail;
3553 Inst.addOperand(MCOperand::CreateImm(align));
3556 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3557 return MCDisassembler::Fail;
3559 Inst.addOperand(MCOperand::CreateReg(0));
3562 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3563 return MCDisassembler::Fail;
3564 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3565 return MCDisassembler::Fail;
3566 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3567 return MCDisassembler::Fail;
3568 Inst.addOperand(MCOperand::CreateImm(index));
3574 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3575 uint64_t Address, const void *Decoder) {
3576 DecodeStatus S = MCDisassembler::Success;
3578 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3579 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3580 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3581 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3582 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3589 return MCDisassembler::Fail;
3591 if (fieldFromInstruction32(Insn, 4, 1))
3593 index = fieldFromInstruction32(Insn, 5, 3);
3596 if (fieldFromInstruction32(Insn, 4, 1))
3598 index = fieldFromInstruction32(Insn, 6, 2);
3599 if (fieldFromInstruction32(Insn, 5, 1))
3603 if (fieldFromInstruction32(Insn, 4, 2))
3604 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3605 index = fieldFromInstruction32(Insn, 7, 1);
3606 if (fieldFromInstruction32(Insn, 6, 1))
3611 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3612 return MCDisassembler::Fail;
3613 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3614 return MCDisassembler::Fail;
3615 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3616 return MCDisassembler::Fail;
3617 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3618 return MCDisassembler::Fail;
3620 if (Rm != 0xF) { // Writeback
3621 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3622 return MCDisassembler::Fail;
3624 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3625 return MCDisassembler::Fail;
3626 Inst.addOperand(MCOperand::CreateImm(align));
3629 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3630 return MCDisassembler::Fail;
3632 Inst.addOperand(MCOperand::CreateReg(0));
3635 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3636 return MCDisassembler::Fail;
3637 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3638 return MCDisassembler::Fail;
3639 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3640 return MCDisassembler::Fail;
3641 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3642 return MCDisassembler::Fail;
3643 Inst.addOperand(MCOperand::CreateImm(index));
3648 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3649 uint64_t Address, const void *Decoder) {
3650 DecodeStatus S = MCDisassembler::Success;
3652 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3653 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3654 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3655 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3656 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3663 return MCDisassembler::Fail;
3665 if (fieldFromInstruction32(Insn, 4, 1))
3667 index = fieldFromInstruction32(Insn, 5, 3);
3670 if (fieldFromInstruction32(Insn, 4, 1))
3672 index = fieldFromInstruction32(Insn, 6, 2);
3673 if (fieldFromInstruction32(Insn, 5, 1))
3677 if (fieldFromInstruction32(Insn, 4, 2))
3678 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3679 index = fieldFromInstruction32(Insn, 7, 1);
3680 if (fieldFromInstruction32(Insn, 6, 1))
3685 if (Rm != 0xF) { // Writeback
3686 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3687 return MCDisassembler::Fail;
3689 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3690 return MCDisassembler::Fail;
3691 Inst.addOperand(MCOperand::CreateImm(align));
3694 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3695 return MCDisassembler::Fail;
3697 Inst.addOperand(MCOperand::CreateReg(0));
3700 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3701 return MCDisassembler::Fail;
3702 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3703 return MCDisassembler::Fail;
3704 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3705 return MCDisassembler::Fail;
3706 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3707 return MCDisassembler::Fail;
3708 Inst.addOperand(MCOperand::CreateImm(index));
3713 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
3714 uint64_t Address, const void *Decoder) {
3715 DecodeStatus S = MCDisassembler::Success;
3716 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3717 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3718 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3719 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3720 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3722 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3723 S = MCDisassembler::SoftFail;
3725 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3726 return MCDisassembler::Fail;
3727 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3728 return MCDisassembler::Fail;
3729 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3730 return MCDisassembler::Fail;
3731 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3732 return MCDisassembler::Fail;
3733 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3734 return MCDisassembler::Fail;
3739 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3740 uint64_t Address, const void *Decoder) {
3741 DecodeStatus S = MCDisassembler::Success;
3742 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3743 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3744 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3745 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3746 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3748 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3749 S = MCDisassembler::SoftFail;
3751 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3752 return MCDisassembler::Fail;
3753 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3754 return MCDisassembler::Fail;
3755 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3756 return MCDisassembler::Fail;
3757 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3758 return MCDisassembler::Fail;
3759 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3760 return MCDisassembler::Fail;
3765 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3766 uint64_t Address, const void *Decoder) {
3767 DecodeStatus S = MCDisassembler::Success;
3768 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3769 // The InstPrinter needs to have the low bit of the predicate in
3770 // the mask operand to be able to print it properly.
3771 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3775 S = MCDisassembler::SoftFail;
3778 if ((mask & 0xF) == 0) {
3779 // Preserve the high bit of the mask, which is the low bit of
3783 S = MCDisassembler::SoftFail;
3786 Inst.addOperand(MCOperand::CreateImm(pred));
3787 Inst.addOperand(MCOperand::CreateImm(mask));
3792 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3793 uint64_t Address, const void *Decoder) {
3794 DecodeStatus S = MCDisassembler::Success;
3796 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3797 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3798 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3799 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3800 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3801 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3802 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3803 bool writeback = (W == 1) | (P == 0);
3805 addr |= (U << 8) | (Rn << 9);
3807 if (writeback && (Rn == Rt || Rn == Rt2))
3808 Check(S, MCDisassembler::SoftFail);
3810 Check(S, MCDisassembler::SoftFail);
3813 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3814 return MCDisassembler::Fail;
3816 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3817 return MCDisassembler::Fail;
3818 // Writeback operand
3819 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3820 return MCDisassembler::Fail;
3822 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3823 return MCDisassembler::Fail;
3829 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3830 uint64_t Address, const void *Decoder) {
3831 DecodeStatus S = MCDisassembler::Success;
3833 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3834 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3835 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3836 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3837 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3838 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3839 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3840 bool writeback = (W == 1) | (P == 0);
3842 addr |= (U << 8) | (Rn << 9);
3844 if (writeback && (Rn == Rt || Rn == Rt2))
3845 Check(S, MCDisassembler::SoftFail);
3847 // Writeback operand
3848 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3849 return MCDisassembler::Fail;
3851 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3852 return MCDisassembler::Fail;
3854 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3855 return MCDisassembler::Fail;
3857 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3858 return MCDisassembler::Fail;
3863 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn,
3864 uint64_t Address, const void *Decoder) {
3865 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
3866 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
3867 if (sign1 != sign2) return MCDisassembler::Fail;
3869 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
3870 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
3871 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
3873 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
3875 return MCDisassembler::Success;