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()) {
448 // Some instructions (mostly conditional branches) are not
449 // allowed in IT blocks.
450 if (!ITBlock.empty())
457 // Some instructions (mostly unconditional branches) can
458 // only appears at the end of, or outside of, an IT.
459 if (ITBlock.size() > 1)
466 // If we're in an IT block, base the predicate on that. Otherwise,
467 // assume a predicate of AL.
469 if (!ITBlock.empty()) {
477 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
478 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
479 MCInst::iterator I = MI.begin();
480 for (unsigned i = 0; i < NumOps; ++i, ++I) {
481 if (I == MI.end()) break;
482 if (OpInfo[i].isPredicate()) {
483 I = MI.insert(I, MCOperand::CreateImm(CC));
486 MI.insert(I, MCOperand::CreateReg(0));
488 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
493 I = MI.insert(I, MCOperand::CreateImm(CC));
496 MI.insert(I, MCOperand::CreateReg(0));
498 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
503 // Thumb VFP instructions are a special case. Because we share their
504 // encodings between ARM and Thumb modes, and they are predicable in ARM
505 // mode, the auto-generated decoder will give them an (incorrect)
506 // predicate operand. We need to rewrite these operands based on the IT
507 // context as a post-pass.
508 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
510 if (!ITBlock.empty()) {
516 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
517 MCInst::iterator I = MI.begin();
518 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
519 for (unsigned i = 0; i < NumOps; ++i, ++I) {
520 if (OpInfo[i].isPredicate() ) {
526 I->setReg(ARM::CPSR);
532 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
533 const MemoryObject &Region,
536 raw_ostream &cs) const {
539 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
540 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
542 // We want to read exactly 2 bytes of data.
543 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
545 return MCDisassembler::Fail;
548 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
549 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
550 if (result != MCDisassembler::Fail) {
552 Check(result, AddThumbPredicate(MI));
557 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
560 bool InITBlock = !ITBlock.empty();
561 Check(result, AddThumbPredicate(MI));
562 AddThumb1SBit(MI, InITBlock);
567 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
568 if (result != MCDisassembler::Fail) {
570 Check(result, AddThumbPredicate(MI));
572 // If we find an IT instruction, we need to parse its condition
573 // code and mask operands so that we can apply them correctly
574 // to the subsequent instructions.
575 if (MI.getOpcode() == ARM::t2IT) {
576 // Nested IT blocks are UNPREDICTABLE.
577 if (!ITBlock.empty())
578 return MCDisassembler::SoftFail;
580 // (3 - the number of trailing zeros) is the number of then / else.
581 unsigned firstcond = MI.getOperand(0).getImm();
582 unsigned Mask = MI.getOperand(1).getImm();
583 unsigned CondBit0 = Mask >> 4 & 1;
584 unsigned NumTZ = CountTrailingZeros_32(Mask);
585 assert(NumTZ <= 3 && "Invalid IT mask!");
586 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
587 bool T = ((Mask >> Pos) & 1) == CondBit0;
589 ITBlock.insert(ITBlock.begin(), firstcond);
591 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
594 ITBlock.push_back(firstcond);
600 // We want to read exactly 4 bytes of data.
601 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
603 return MCDisassembler::Fail;
606 uint32_t insn32 = (bytes[3] << 8) |
611 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
612 if (result != MCDisassembler::Fail) {
614 bool InITBlock = ITBlock.size();
615 Check(result, AddThumbPredicate(MI));
616 AddThumb1SBit(MI, InITBlock);
621 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
622 if (result != MCDisassembler::Fail) {
624 Check(result, AddThumbPredicate(MI));
629 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
630 if (result != MCDisassembler::Fail) {
632 UpdateThumbVFPPredicate(MI);
637 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
638 if (result != MCDisassembler::Fail) {
640 Check(result, AddThumbPredicate(MI));
644 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
646 uint32_t NEONLdStInsn = insn32;
647 NEONLdStInsn &= 0xF0FFFFFF;
648 NEONLdStInsn |= 0x04000000;
649 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
650 if (result != MCDisassembler::Fail) {
652 Check(result, AddThumbPredicate(MI));
657 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
659 uint32_t NEONDataInsn = insn32;
660 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
661 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
662 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
663 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
664 if (result != MCDisassembler::Fail) {
666 Check(result, AddThumbPredicate(MI));
672 return MCDisassembler::Fail;
676 extern "C" void LLVMInitializeARMDisassembler() {
677 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
678 createARMDisassembler);
679 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
680 createThumbDisassembler);
683 static const unsigned GPRDecoderTable[] = {
684 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
685 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
686 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
687 ARM::R12, ARM::SP, ARM::LR, ARM::PC
690 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
691 uint64_t Address, const void *Decoder) {
693 return MCDisassembler::Fail;
695 unsigned Register = GPRDecoderTable[RegNo];
696 Inst.addOperand(MCOperand::CreateReg(Register));
697 return MCDisassembler::Success;
701 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
702 uint64_t Address, const void *Decoder) {
703 if (RegNo == 15) return MCDisassembler::Fail;
704 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
707 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
708 uint64_t Address, const void *Decoder) {
710 return MCDisassembler::Fail;
711 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
714 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
715 uint64_t Address, const void *Decoder) {
716 unsigned Register = 0;
737 return MCDisassembler::Fail;
740 Inst.addOperand(MCOperand::CreateReg(Register));
741 return MCDisassembler::Success;
744 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
745 uint64_t Address, const void *Decoder) {
746 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
747 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
750 static const unsigned SPRDecoderTable[] = {
751 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
752 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
753 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
754 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
755 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
756 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
757 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
758 ARM::S28, ARM::S29, ARM::S30, ARM::S31
761 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
762 uint64_t Address, const void *Decoder) {
764 return MCDisassembler::Fail;
766 unsigned Register = SPRDecoderTable[RegNo];
767 Inst.addOperand(MCOperand::CreateReg(Register));
768 return MCDisassembler::Success;
771 static const unsigned DPRDecoderTable[] = {
772 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
773 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
774 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
775 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
776 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
777 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
778 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
779 ARM::D28, ARM::D29, ARM::D30, ARM::D31
782 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
783 uint64_t Address, const void *Decoder) {
785 return MCDisassembler::Fail;
787 unsigned Register = DPRDecoderTable[RegNo];
788 Inst.addOperand(MCOperand::CreateReg(Register));
789 return MCDisassembler::Success;
792 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
793 uint64_t Address, const void *Decoder) {
795 return MCDisassembler::Fail;
796 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
800 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
801 uint64_t Address, const void *Decoder) {
803 return MCDisassembler::Fail;
804 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
807 static const unsigned QPRDecoderTable[] = {
808 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
809 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
810 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
811 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
815 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
816 uint64_t Address, const void *Decoder) {
818 return MCDisassembler::Fail;
821 unsigned Register = QPRDecoderTable[RegNo];
822 Inst.addOperand(MCOperand::CreateReg(Register));
823 return MCDisassembler::Success;
826 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
827 uint64_t Address, const void *Decoder) {
828 if (Val == 0xF) return MCDisassembler::Fail;
829 // AL predicate is not allowed on Thumb1 branches.
830 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
831 return MCDisassembler::Fail;
832 Inst.addOperand(MCOperand::CreateImm(Val));
833 if (Val == ARMCC::AL) {
834 Inst.addOperand(MCOperand::CreateReg(0));
836 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
837 return MCDisassembler::Success;
840 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
841 uint64_t Address, const void *Decoder) {
843 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
845 Inst.addOperand(MCOperand::CreateReg(0));
846 return MCDisassembler::Success;
849 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
850 uint64_t Address, const void *Decoder) {
851 uint32_t imm = Val & 0xFF;
852 uint32_t rot = (Val & 0xF00) >> 7;
853 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
854 Inst.addOperand(MCOperand::CreateImm(rot_imm));
855 return MCDisassembler::Success;
858 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
859 uint64_t Address, const void *Decoder) {
860 DecodeStatus S = MCDisassembler::Success;
862 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
863 unsigned type = fieldFromInstruction32(Val, 5, 2);
864 unsigned imm = fieldFromInstruction32(Val, 7, 5);
866 // Register-immediate
867 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
868 return MCDisassembler::Fail;
870 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
886 if (Shift == ARM_AM::ror && imm == 0)
889 unsigned Op = Shift | (imm << 3);
890 Inst.addOperand(MCOperand::CreateImm(Op));
895 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
896 uint64_t Address, const void *Decoder) {
897 DecodeStatus S = MCDisassembler::Success;
899 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
900 unsigned type = fieldFromInstruction32(Val, 5, 2);
901 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
904 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
905 return MCDisassembler::Fail;
906 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
907 return MCDisassembler::Fail;
909 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
925 Inst.addOperand(MCOperand::CreateImm(Shift));
930 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
931 uint64_t Address, const void *Decoder) {
932 DecodeStatus S = MCDisassembler::Success;
934 bool writebackLoad = false;
935 unsigned writebackReg = 0;
936 switch (Inst.getOpcode()) {
943 case ARM::t2LDMIA_UPD:
944 case ARM::t2LDMDB_UPD:
945 writebackLoad = true;
946 writebackReg = Inst.getOperand(0).getReg();
950 // Empty register lists are not allowed.
951 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
952 for (unsigned i = 0; i < 16; ++i) {
953 if (Val & (1 << i)) {
954 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
955 return MCDisassembler::Fail;
956 // Writeback not allowed if Rn is in the target list.
957 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
958 Check(S, MCDisassembler::SoftFail);
965 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
966 uint64_t Address, const void *Decoder) {
967 DecodeStatus S = MCDisassembler::Success;
969 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
970 unsigned regs = Val & 0xFF;
972 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
973 return MCDisassembler::Fail;
974 for (unsigned i = 0; i < (regs - 1); ++i) {
975 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
976 return MCDisassembler::Fail;
982 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
983 uint64_t Address, const void *Decoder) {
984 DecodeStatus S = MCDisassembler::Success;
986 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
987 unsigned regs = (Val & 0xFF) / 2;
989 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
990 return MCDisassembler::Fail;
991 for (unsigned i = 0; i < (regs - 1); ++i) {
992 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
993 return MCDisassembler::Fail;
999 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
1000 uint64_t Address, const void *Decoder) {
1001 // This operand encodes a mask of contiguous zeros between a specified MSB
1002 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1003 // the mask of all bits LSB-and-lower, and then xor them to create
1004 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1005 // create the final mask.
1006 unsigned msb = fieldFromInstruction32(Val, 5, 5);
1007 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
1009 DecodeStatus S = MCDisassembler::Success;
1010 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1012 uint32_t msb_mask = 0xFFFFFFFF;
1013 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1014 uint32_t lsb_mask = (1U << lsb) - 1;
1016 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1020 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
1021 uint64_t Address, const void *Decoder) {
1022 DecodeStatus S = MCDisassembler::Success;
1024 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1025 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
1026 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
1027 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
1028 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1029 unsigned U = fieldFromInstruction32(Insn, 23, 1);
1031 switch (Inst.getOpcode()) {
1032 case ARM::LDC_OFFSET:
1035 case ARM::LDC_OPTION:
1036 case ARM::LDCL_OFFSET:
1038 case ARM::LDCL_POST:
1039 case ARM::LDCL_OPTION:
1040 case ARM::STC_OFFSET:
1043 case ARM::STC_OPTION:
1044 case ARM::STCL_OFFSET:
1046 case ARM::STCL_POST:
1047 case ARM::STCL_OPTION:
1048 case ARM::t2LDC_OFFSET:
1049 case ARM::t2LDC_PRE:
1050 case ARM::t2LDC_POST:
1051 case ARM::t2LDC_OPTION:
1052 case ARM::t2LDCL_OFFSET:
1053 case ARM::t2LDCL_PRE:
1054 case ARM::t2LDCL_POST:
1055 case ARM::t2LDCL_OPTION:
1056 case ARM::t2STC_OFFSET:
1057 case ARM::t2STC_PRE:
1058 case ARM::t2STC_POST:
1059 case ARM::t2STC_OPTION:
1060 case ARM::t2STCL_OFFSET:
1061 case ARM::t2STCL_PRE:
1062 case ARM::t2STCL_POST:
1063 case ARM::t2STCL_OPTION:
1064 if (coproc == 0xA || coproc == 0xB)
1065 return MCDisassembler::Fail;
1071 Inst.addOperand(MCOperand::CreateImm(coproc));
1072 Inst.addOperand(MCOperand::CreateImm(CRd));
1073 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1074 return MCDisassembler::Fail;
1075 switch (Inst.getOpcode()) {
1076 case ARM::LDC_OPTION:
1077 case ARM::LDCL_OPTION:
1078 case ARM::LDC2_OPTION:
1079 case ARM::LDC2L_OPTION:
1080 case ARM::STC_OPTION:
1081 case ARM::STCL_OPTION:
1082 case ARM::STC2_OPTION:
1083 case ARM::STC2L_OPTION:
1084 case ARM::LDCL_POST:
1085 case ARM::STCL_POST:
1086 case ARM::LDC2L_POST:
1087 case ARM::STC2L_POST:
1088 case ARM::t2LDC_OPTION:
1089 case ARM::t2LDCL_OPTION:
1090 case ARM::t2STC_OPTION:
1091 case ARM::t2STCL_OPTION:
1092 case ARM::t2LDCL_POST:
1093 case ARM::t2STCL_POST:
1096 Inst.addOperand(MCOperand::CreateReg(0));
1100 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1101 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1103 bool writeback = (P == 0) || (W == 1);
1104 unsigned idx_mode = 0;
1106 idx_mode = ARMII::IndexModePre;
1107 else if (!P && writeback)
1108 idx_mode = ARMII::IndexModePost;
1110 switch (Inst.getOpcode()) {
1111 case ARM::LDCL_POST:
1112 case ARM::STCL_POST:
1113 case ARM::t2LDCL_POST:
1114 case ARM::t2STCL_POST:
1115 case ARM::LDC2L_POST:
1116 case ARM::STC2L_POST:
1118 case ARM::LDC_OPTION:
1119 case ARM::LDCL_OPTION:
1120 case ARM::LDC2_OPTION:
1121 case ARM::LDC2L_OPTION:
1122 case ARM::STC_OPTION:
1123 case ARM::STCL_OPTION:
1124 case ARM::STC2_OPTION:
1125 case ARM::STC2L_OPTION:
1126 case ARM::t2LDC_OPTION:
1127 case ARM::t2LDCL_OPTION:
1128 case ARM::t2STC_OPTION:
1129 case ARM::t2STCL_OPTION:
1130 Inst.addOperand(MCOperand::CreateImm(imm));
1134 Inst.addOperand(MCOperand::CreateImm(
1135 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
1137 Inst.addOperand(MCOperand::CreateImm(
1138 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
1142 switch (Inst.getOpcode()) {
1143 case ARM::LDC_OFFSET:
1146 case ARM::LDC_OPTION:
1147 case ARM::LDCL_OFFSET:
1149 case ARM::LDCL_POST:
1150 case ARM::LDCL_OPTION:
1151 case ARM::STC_OFFSET:
1154 case ARM::STC_OPTION:
1155 case ARM::STCL_OFFSET:
1157 case ARM::STCL_POST:
1158 case ARM::STCL_OPTION:
1159 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1160 return MCDisassembler::Fail;
1170 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1171 uint64_t Address, const void *Decoder) {
1172 DecodeStatus S = MCDisassembler::Success;
1174 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1175 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1176 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1177 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1178 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1179 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1180 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1181 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1183 // On stores, the writeback operand precedes Rt.
1184 switch (Inst.getOpcode()) {
1185 case ARM::STR_POST_IMM:
1186 case ARM::STR_POST_REG:
1187 case ARM::STRB_POST_IMM:
1188 case ARM::STRB_POST_REG:
1189 case ARM::STRT_POST_REG:
1190 case ARM::STRT_POST_IMM:
1191 case ARM::STRBT_POST_REG:
1192 case ARM::STRBT_POST_IMM:
1193 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1194 return MCDisassembler::Fail;
1200 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1201 return MCDisassembler::Fail;
1203 // On loads, the writeback operand comes after Rt.
1204 switch (Inst.getOpcode()) {
1205 case ARM::LDR_POST_IMM:
1206 case ARM::LDR_POST_REG:
1207 case ARM::LDRB_POST_IMM:
1208 case ARM::LDRB_POST_REG:
1209 case ARM::LDRBT_POST_REG:
1210 case ARM::LDRBT_POST_IMM:
1211 case ARM::LDRT_POST_REG:
1212 case ARM::LDRT_POST_IMM:
1213 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1214 return MCDisassembler::Fail;
1220 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1221 return MCDisassembler::Fail;
1223 ARM_AM::AddrOpc Op = ARM_AM::add;
1224 if (!fieldFromInstruction32(Insn, 23, 1))
1227 bool writeback = (P == 0) || (W == 1);
1228 unsigned idx_mode = 0;
1230 idx_mode = ARMII::IndexModePre;
1231 else if (!P && writeback)
1232 idx_mode = ARMII::IndexModePost;
1234 if (writeback && (Rn == 15 || Rn == Rt))
1235 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1238 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1239 return MCDisassembler::Fail;
1240 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1241 switch( fieldFromInstruction32(Insn, 5, 2)) {
1255 return MCDisassembler::Fail;
1257 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1258 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1260 Inst.addOperand(MCOperand::CreateImm(imm));
1262 Inst.addOperand(MCOperand::CreateReg(0));
1263 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1264 Inst.addOperand(MCOperand::CreateImm(tmp));
1267 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1268 return MCDisassembler::Fail;
1273 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1274 uint64_t Address, const void *Decoder) {
1275 DecodeStatus S = MCDisassembler::Success;
1277 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1278 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1279 unsigned type = fieldFromInstruction32(Val, 5, 2);
1280 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1281 unsigned U = fieldFromInstruction32(Val, 12, 1);
1283 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1299 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1300 return MCDisassembler::Fail;
1301 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1302 return MCDisassembler::Fail;
1305 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1307 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1308 Inst.addOperand(MCOperand::CreateImm(shift));
1314 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1315 uint64_t Address, const void *Decoder) {
1316 DecodeStatus S = MCDisassembler::Success;
1318 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1319 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1320 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1321 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1322 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1323 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1324 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1325 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1326 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1328 bool writeback = (W == 1) | (P == 0);
1330 // For {LD,ST}RD, Rt must be even, else undefined.
1331 switch (Inst.getOpcode()) {
1334 case ARM::STRD_POST:
1337 case ARM::LDRD_POST:
1338 if (Rt & 0x1) return MCDisassembler::Fail;
1344 if (writeback) { // Writeback
1346 U |= ARMII::IndexModePre << 9;
1348 U |= ARMII::IndexModePost << 9;
1350 // On stores, the writeback operand precedes Rt.
1351 switch (Inst.getOpcode()) {
1354 case ARM::STRD_POST:
1357 case ARM::STRH_POST:
1358 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1359 return MCDisassembler::Fail;
1366 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1367 return MCDisassembler::Fail;
1368 switch (Inst.getOpcode()) {
1371 case ARM::STRD_POST:
1374 case ARM::LDRD_POST:
1375 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1376 return MCDisassembler::Fail;
1383 // On loads, the writeback operand comes after Rt.
1384 switch (Inst.getOpcode()) {
1387 case ARM::LDRD_POST:
1390 case ARM::LDRH_POST:
1392 case ARM::LDRSH_PRE:
1393 case ARM::LDRSH_POST:
1395 case ARM::LDRSB_PRE:
1396 case ARM::LDRSB_POST:
1399 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1400 return MCDisassembler::Fail;
1407 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1408 return MCDisassembler::Fail;
1411 Inst.addOperand(MCOperand::CreateReg(0));
1412 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1414 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1415 return MCDisassembler::Fail;
1416 Inst.addOperand(MCOperand::CreateImm(U));
1419 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1420 return MCDisassembler::Fail;
1425 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1426 uint64_t Address, const void *Decoder) {
1427 DecodeStatus S = MCDisassembler::Success;
1429 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1430 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1447 Inst.addOperand(MCOperand::CreateImm(mode));
1448 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1449 return MCDisassembler::Fail;
1454 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1456 uint64_t Address, const void *Decoder) {
1457 DecodeStatus S = MCDisassembler::Success;
1459 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1460 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1461 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1464 switch (Inst.getOpcode()) {
1466 Inst.setOpcode(ARM::RFEDA);
1468 case ARM::LDMDA_UPD:
1469 Inst.setOpcode(ARM::RFEDA_UPD);
1472 Inst.setOpcode(ARM::RFEDB);
1474 case ARM::LDMDB_UPD:
1475 Inst.setOpcode(ARM::RFEDB_UPD);
1478 Inst.setOpcode(ARM::RFEIA);
1480 case ARM::LDMIA_UPD:
1481 Inst.setOpcode(ARM::RFEIA_UPD);
1484 Inst.setOpcode(ARM::RFEIB);
1486 case ARM::LDMIB_UPD:
1487 Inst.setOpcode(ARM::RFEIB_UPD);
1490 Inst.setOpcode(ARM::SRSDA);
1492 case ARM::STMDA_UPD:
1493 Inst.setOpcode(ARM::SRSDA_UPD);
1496 Inst.setOpcode(ARM::SRSDB);
1498 case ARM::STMDB_UPD:
1499 Inst.setOpcode(ARM::SRSDB_UPD);
1502 Inst.setOpcode(ARM::SRSIA);
1504 case ARM::STMIA_UPD:
1505 Inst.setOpcode(ARM::SRSIA_UPD);
1508 Inst.setOpcode(ARM::SRSIB);
1510 case ARM::STMIB_UPD:
1511 Inst.setOpcode(ARM::SRSIB_UPD);
1514 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1517 // For stores (which become SRS's, the only operand is the mode.
1518 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1520 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1524 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1527 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1528 return MCDisassembler::Fail;
1529 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1530 return MCDisassembler::Fail; // Tied
1531 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1532 return MCDisassembler::Fail;
1533 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1534 return MCDisassembler::Fail;
1539 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1540 uint64_t Address, const void *Decoder) {
1541 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1542 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1543 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1544 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1546 DecodeStatus S = MCDisassembler::Success;
1548 // imod == '01' --> UNPREDICTABLE
1549 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1550 // return failure here. The '01' imod value is unprintable, so there's
1551 // nothing useful we could do even if we returned UNPREDICTABLE.
1553 if (imod == 1) return MCDisassembler::Fail;
1556 Inst.setOpcode(ARM::CPS3p);
1557 Inst.addOperand(MCOperand::CreateImm(imod));
1558 Inst.addOperand(MCOperand::CreateImm(iflags));
1559 Inst.addOperand(MCOperand::CreateImm(mode));
1560 } else if (imod && !M) {
1561 Inst.setOpcode(ARM::CPS2p);
1562 Inst.addOperand(MCOperand::CreateImm(imod));
1563 Inst.addOperand(MCOperand::CreateImm(iflags));
1564 if (mode) S = MCDisassembler::SoftFail;
1565 } else if (!imod && M) {
1566 Inst.setOpcode(ARM::CPS1p);
1567 Inst.addOperand(MCOperand::CreateImm(mode));
1568 if (iflags) S = MCDisassembler::SoftFail;
1570 // imod == '00' && M == '0' --> UNPREDICTABLE
1571 Inst.setOpcode(ARM::CPS1p);
1572 Inst.addOperand(MCOperand::CreateImm(mode));
1573 S = MCDisassembler::SoftFail;
1579 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1580 uint64_t Address, const void *Decoder) {
1581 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1582 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1583 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1584 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1586 DecodeStatus S = MCDisassembler::Success;
1588 // imod == '01' --> UNPREDICTABLE
1589 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1590 // return failure here. The '01' imod value is unprintable, so there's
1591 // nothing useful we could do even if we returned UNPREDICTABLE.
1593 if (imod == 1) return MCDisassembler::Fail;
1596 Inst.setOpcode(ARM::t2CPS3p);
1597 Inst.addOperand(MCOperand::CreateImm(imod));
1598 Inst.addOperand(MCOperand::CreateImm(iflags));
1599 Inst.addOperand(MCOperand::CreateImm(mode));
1600 } else if (imod && !M) {
1601 Inst.setOpcode(ARM::t2CPS2p);
1602 Inst.addOperand(MCOperand::CreateImm(imod));
1603 Inst.addOperand(MCOperand::CreateImm(iflags));
1604 if (mode) S = MCDisassembler::SoftFail;
1605 } else if (!imod && M) {
1606 Inst.setOpcode(ARM::t2CPS1p);
1607 Inst.addOperand(MCOperand::CreateImm(mode));
1608 if (iflags) S = MCDisassembler::SoftFail;
1610 // imod == '00' && M == '0' --> UNPREDICTABLE
1611 Inst.setOpcode(ARM::t2CPS1p);
1612 Inst.addOperand(MCOperand::CreateImm(mode));
1613 S = MCDisassembler::SoftFail;
1620 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1621 uint64_t Address, const void *Decoder) {
1622 DecodeStatus S = MCDisassembler::Success;
1624 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1625 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1626 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1627 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1628 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1631 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1633 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1634 return MCDisassembler::Fail;
1635 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1636 return MCDisassembler::Fail;
1637 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1638 return MCDisassembler::Fail;
1639 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1640 return MCDisassembler::Fail;
1642 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1643 return MCDisassembler::Fail;
1648 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1649 uint64_t Address, const void *Decoder) {
1650 DecodeStatus S = MCDisassembler::Success;
1652 unsigned add = fieldFromInstruction32(Val, 12, 1);
1653 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1654 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1656 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1657 return MCDisassembler::Fail;
1659 if (!add) imm *= -1;
1660 if (imm == 0 && !add) imm = INT32_MIN;
1661 Inst.addOperand(MCOperand::CreateImm(imm));
1666 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1667 uint64_t Address, const void *Decoder) {
1668 DecodeStatus S = MCDisassembler::Success;
1670 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1671 unsigned U = fieldFromInstruction32(Val, 8, 1);
1672 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1674 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1675 return MCDisassembler::Fail;
1678 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1680 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1685 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1686 uint64_t Address, const void *Decoder) {
1687 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1691 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1692 uint64_t Address, const void *Decoder) {
1693 DecodeStatus S = MCDisassembler::Success;
1695 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1696 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1699 Inst.setOpcode(ARM::BLXi);
1700 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1701 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1705 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1706 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1707 return MCDisassembler::Fail;
1713 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1714 uint64_t Address, const void *Decoder) {
1715 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1716 return MCDisassembler::Success;
1719 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1720 uint64_t Address, const void *Decoder) {
1721 DecodeStatus S = MCDisassembler::Success;
1723 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1724 unsigned align = fieldFromInstruction32(Val, 4, 2);
1726 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1727 return MCDisassembler::Fail;
1729 Inst.addOperand(MCOperand::CreateImm(0));
1731 Inst.addOperand(MCOperand::CreateImm(4 << align));
1736 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1737 uint64_t Address, const void *Decoder) {
1738 DecodeStatus S = MCDisassembler::Success;
1740 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1741 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1742 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1743 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1744 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1745 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1747 // First output register
1748 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1749 return MCDisassembler::Fail;
1751 // Second output register
1752 switch (Inst.getOpcode()) {
1757 case ARM::VLD1q8_UPD:
1758 case ARM::VLD1q16_UPD:
1759 case ARM::VLD1q32_UPD:
1760 case ARM::VLD1q64_UPD:
1765 case ARM::VLD1d8T_UPD:
1766 case ARM::VLD1d16T_UPD:
1767 case ARM::VLD1d32T_UPD:
1768 case ARM::VLD1d64T_UPD:
1773 case ARM::VLD1d8Q_UPD:
1774 case ARM::VLD1d16Q_UPD:
1775 case ARM::VLD1d32Q_UPD:
1776 case ARM::VLD1d64Q_UPD:
1780 case ARM::VLD2d8_UPD:
1781 case ARM::VLD2d16_UPD:
1782 case ARM::VLD2d32_UPD:
1786 case ARM::VLD2q8_UPD:
1787 case ARM::VLD2q16_UPD:
1788 case ARM::VLD2q32_UPD:
1792 case ARM::VLD3d8_UPD:
1793 case ARM::VLD3d16_UPD:
1794 case ARM::VLD3d32_UPD:
1798 case ARM::VLD4d8_UPD:
1799 case ARM::VLD4d16_UPD:
1800 case ARM::VLD4d32_UPD:
1801 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
1802 return MCDisassembler::Fail;
1807 case ARM::VLD2b8_UPD:
1808 case ARM::VLD2b16_UPD:
1809 case ARM::VLD2b32_UPD:
1813 case ARM::VLD3q8_UPD:
1814 case ARM::VLD3q16_UPD:
1815 case ARM::VLD3q32_UPD:
1819 case ARM::VLD4q8_UPD:
1820 case ARM::VLD4q16_UPD:
1821 case ARM::VLD4q32_UPD:
1822 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1823 return MCDisassembler::Fail;
1828 // Third output register
1829 switch(Inst.getOpcode()) {
1834 case ARM::VLD1d8T_UPD:
1835 case ARM::VLD1d16T_UPD:
1836 case ARM::VLD1d32T_UPD:
1837 case ARM::VLD1d64T_UPD:
1842 case ARM::VLD1d8Q_UPD:
1843 case ARM::VLD1d16Q_UPD:
1844 case ARM::VLD1d32Q_UPD:
1845 case ARM::VLD1d64Q_UPD:
1849 case ARM::VLD2q8_UPD:
1850 case ARM::VLD2q16_UPD:
1851 case ARM::VLD2q32_UPD:
1855 case ARM::VLD3d8_UPD:
1856 case ARM::VLD3d16_UPD:
1857 case ARM::VLD3d32_UPD:
1861 case ARM::VLD4d8_UPD:
1862 case ARM::VLD4d16_UPD:
1863 case ARM::VLD4d32_UPD:
1864 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1865 return MCDisassembler::Fail;
1870 case ARM::VLD3q8_UPD:
1871 case ARM::VLD3q16_UPD:
1872 case ARM::VLD3q32_UPD:
1876 case ARM::VLD4q8_UPD:
1877 case ARM::VLD4q16_UPD:
1878 case ARM::VLD4q32_UPD:
1879 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
1880 return MCDisassembler::Fail;
1886 // Fourth output register
1887 switch (Inst.getOpcode()) {
1892 case ARM::VLD1d8Q_UPD:
1893 case ARM::VLD1d16Q_UPD:
1894 case ARM::VLD1d32Q_UPD:
1895 case ARM::VLD1d64Q_UPD:
1899 case ARM::VLD2q8_UPD:
1900 case ARM::VLD2q16_UPD:
1901 case ARM::VLD2q32_UPD:
1905 case ARM::VLD4d8_UPD:
1906 case ARM::VLD4d16_UPD:
1907 case ARM::VLD4d32_UPD:
1908 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
1909 return MCDisassembler::Fail;
1914 case ARM::VLD4q8_UPD:
1915 case ARM::VLD4q16_UPD:
1916 case ARM::VLD4q32_UPD:
1917 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
1918 return MCDisassembler::Fail;
1924 // Writeback operand
1925 switch (Inst.getOpcode()) {
1926 case ARM::VLD1d8_UPD:
1927 case ARM::VLD1d16_UPD:
1928 case ARM::VLD1d32_UPD:
1929 case ARM::VLD1d64_UPD:
1930 case ARM::VLD1q8_UPD:
1931 case ARM::VLD1q16_UPD:
1932 case ARM::VLD1q32_UPD:
1933 case ARM::VLD1q64_UPD:
1934 case ARM::VLD1d8T_UPD:
1935 case ARM::VLD1d16T_UPD:
1936 case ARM::VLD1d32T_UPD:
1937 case ARM::VLD1d64T_UPD:
1938 case ARM::VLD1d8Q_UPD:
1939 case ARM::VLD1d16Q_UPD:
1940 case ARM::VLD1d32Q_UPD:
1941 case ARM::VLD1d64Q_UPD:
1942 case ARM::VLD2d8_UPD:
1943 case ARM::VLD2d16_UPD:
1944 case ARM::VLD2d32_UPD:
1945 case ARM::VLD2q8_UPD:
1946 case ARM::VLD2q16_UPD:
1947 case ARM::VLD2q32_UPD:
1948 case ARM::VLD2b8_UPD:
1949 case ARM::VLD2b16_UPD:
1950 case ARM::VLD2b32_UPD:
1951 case ARM::VLD3d8_UPD:
1952 case ARM::VLD3d16_UPD:
1953 case ARM::VLD3d32_UPD:
1954 case ARM::VLD3q8_UPD:
1955 case ARM::VLD3q16_UPD:
1956 case ARM::VLD3q32_UPD:
1957 case ARM::VLD4d8_UPD:
1958 case ARM::VLD4d16_UPD:
1959 case ARM::VLD4d32_UPD:
1960 case ARM::VLD4q8_UPD:
1961 case ARM::VLD4q16_UPD:
1962 case ARM::VLD4q32_UPD:
1963 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
1964 return MCDisassembler::Fail;
1970 // AddrMode6 Base (register+alignment)
1971 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
1972 return MCDisassembler::Fail;
1974 // AddrMode6 Offset (register)
1976 Inst.addOperand(MCOperand::CreateReg(0));
1977 else if (Rm != 0xF) {
1978 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1979 return MCDisassembler::Fail;
1985 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
1986 uint64_t Address, const void *Decoder) {
1987 DecodeStatus S = MCDisassembler::Success;
1989 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1990 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1991 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1992 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1993 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1994 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1996 // Writeback Operand
1997 switch (Inst.getOpcode()) {
1998 case ARM::VST1d8_UPD:
1999 case ARM::VST1d16_UPD:
2000 case ARM::VST1d32_UPD:
2001 case ARM::VST1d64_UPD:
2002 case ARM::VST1q8_UPD:
2003 case ARM::VST1q16_UPD:
2004 case ARM::VST1q32_UPD:
2005 case ARM::VST1q64_UPD:
2006 case ARM::VST1d8T_UPD:
2007 case ARM::VST1d16T_UPD:
2008 case ARM::VST1d32T_UPD:
2009 case ARM::VST1d64T_UPD:
2010 case ARM::VST1d8Q_UPD:
2011 case ARM::VST1d16Q_UPD:
2012 case ARM::VST1d32Q_UPD:
2013 case ARM::VST1d64Q_UPD:
2014 case ARM::VST2d8_UPD:
2015 case ARM::VST2d16_UPD:
2016 case ARM::VST2d32_UPD:
2017 case ARM::VST2q8_UPD:
2018 case ARM::VST2q16_UPD:
2019 case ARM::VST2q32_UPD:
2020 case ARM::VST2b8_UPD:
2021 case ARM::VST2b16_UPD:
2022 case ARM::VST2b32_UPD:
2023 case ARM::VST3d8_UPD:
2024 case ARM::VST3d16_UPD:
2025 case ARM::VST3d32_UPD:
2026 case ARM::VST3q8_UPD:
2027 case ARM::VST3q16_UPD:
2028 case ARM::VST3q32_UPD:
2029 case ARM::VST4d8_UPD:
2030 case ARM::VST4d16_UPD:
2031 case ARM::VST4d32_UPD:
2032 case ARM::VST4q8_UPD:
2033 case ARM::VST4q16_UPD:
2034 case ARM::VST4q32_UPD:
2035 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2036 return MCDisassembler::Fail;
2042 // AddrMode6 Base (register+alignment)
2043 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2044 return MCDisassembler::Fail;
2046 // AddrMode6 Offset (register)
2048 Inst.addOperand(MCOperand::CreateReg(0));
2049 else if (Rm != 0xF) {
2050 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2051 return MCDisassembler::Fail;
2054 // First input register
2055 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2056 return MCDisassembler::Fail;
2058 // Second input register
2059 switch (Inst.getOpcode()) {
2064 case ARM::VST1q8_UPD:
2065 case ARM::VST1q16_UPD:
2066 case ARM::VST1q32_UPD:
2067 case ARM::VST1q64_UPD:
2072 case ARM::VST1d8T_UPD:
2073 case ARM::VST1d16T_UPD:
2074 case ARM::VST1d32T_UPD:
2075 case ARM::VST1d64T_UPD:
2080 case ARM::VST1d8Q_UPD:
2081 case ARM::VST1d16Q_UPD:
2082 case ARM::VST1d32Q_UPD:
2083 case ARM::VST1d64Q_UPD:
2087 case ARM::VST2d8_UPD:
2088 case ARM::VST2d16_UPD:
2089 case ARM::VST2d32_UPD:
2093 case ARM::VST2q8_UPD:
2094 case ARM::VST2q16_UPD:
2095 case ARM::VST2q32_UPD:
2099 case ARM::VST3d8_UPD:
2100 case ARM::VST3d16_UPD:
2101 case ARM::VST3d32_UPD:
2105 case ARM::VST4d8_UPD:
2106 case ARM::VST4d16_UPD:
2107 case ARM::VST4d32_UPD:
2108 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2109 return MCDisassembler::Fail;
2114 case ARM::VST2b8_UPD:
2115 case ARM::VST2b16_UPD:
2116 case ARM::VST2b32_UPD:
2120 case ARM::VST3q8_UPD:
2121 case ARM::VST3q16_UPD:
2122 case ARM::VST3q32_UPD:
2126 case ARM::VST4q8_UPD:
2127 case ARM::VST4q16_UPD:
2128 case ARM::VST4q32_UPD:
2129 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2130 return MCDisassembler::Fail;
2136 // Third input register
2137 switch (Inst.getOpcode()) {
2142 case ARM::VST1d8T_UPD:
2143 case ARM::VST1d16T_UPD:
2144 case ARM::VST1d32T_UPD:
2145 case ARM::VST1d64T_UPD:
2150 case ARM::VST1d8Q_UPD:
2151 case ARM::VST1d16Q_UPD:
2152 case ARM::VST1d32Q_UPD:
2153 case ARM::VST1d64Q_UPD:
2157 case ARM::VST2q8_UPD:
2158 case ARM::VST2q16_UPD:
2159 case ARM::VST2q32_UPD:
2163 case ARM::VST3d8_UPD:
2164 case ARM::VST3d16_UPD:
2165 case ARM::VST3d32_UPD:
2169 case ARM::VST4d8_UPD:
2170 case ARM::VST4d16_UPD:
2171 case ARM::VST4d32_UPD:
2172 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2173 return MCDisassembler::Fail;
2178 case ARM::VST3q8_UPD:
2179 case ARM::VST3q16_UPD:
2180 case ARM::VST3q32_UPD:
2184 case ARM::VST4q8_UPD:
2185 case ARM::VST4q16_UPD:
2186 case ARM::VST4q32_UPD:
2187 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2188 return MCDisassembler::Fail;
2194 // Fourth input register
2195 switch (Inst.getOpcode()) {
2200 case ARM::VST1d8Q_UPD:
2201 case ARM::VST1d16Q_UPD:
2202 case ARM::VST1d32Q_UPD:
2203 case ARM::VST1d64Q_UPD:
2207 case ARM::VST2q8_UPD:
2208 case ARM::VST2q16_UPD:
2209 case ARM::VST2q32_UPD:
2213 case ARM::VST4d8_UPD:
2214 case ARM::VST4d16_UPD:
2215 case ARM::VST4d32_UPD:
2216 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2217 return MCDisassembler::Fail;
2222 case ARM::VST4q8_UPD:
2223 case ARM::VST4q16_UPD:
2224 case ARM::VST4q32_UPD:
2225 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2226 return MCDisassembler::Fail;
2235 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2236 uint64_t Address, const void *Decoder) {
2237 DecodeStatus S = MCDisassembler::Success;
2239 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2240 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2241 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2242 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2243 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2244 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2245 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
2247 align *= (1 << size);
2249 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2250 return MCDisassembler::Fail;
2252 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2253 return MCDisassembler::Fail;
2256 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2257 return MCDisassembler::Fail;
2260 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2261 return MCDisassembler::Fail;
2262 Inst.addOperand(MCOperand::CreateImm(align));
2265 Inst.addOperand(MCOperand::CreateReg(0));
2266 else if (Rm != 0xF) {
2267 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2268 return MCDisassembler::Fail;
2274 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2275 uint64_t Address, const void *Decoder) {
2276 DecodeStatus S = MCDisassembler::Success;
2278 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2279 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2280 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2281 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2282 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2283 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2284 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2287 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2288 return MCDisassembler::Fail;
2289 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2290 return MCDisassembler::Fail;
2292 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2293 return MCDisassembler::Fail;
2296 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2297 return MCDisassembler::Fail;
2298 Inst.addOperand(MCOperand::CreateImm(align));
2301 Inst.addOperand(MCOperand::CreateReg(0));
2302 else if (Rm != 0xF) {
2303 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2304 return MCDisassembler::Fail;
2310 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2311 uint64_t Address, const void *Decoder) {
2312 DecodeStatus S = MCDisassembler::Success;
2314 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2315 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2316 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2317 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2318 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2320 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2321 return MCDisassembler::Fail;
2322 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2323 return MCDisassembler::Fail;
2324 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2325 return MCDisassembler::Fail;
2327 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2328 return MCDisassembler::Fail;
2331 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2332 return MCDisassembler::Fail;
2333 Inst.addOperand(MCOperand::CreateImm(0));
2336 Inst.addOperand(MCOperand::CreateReg(0));
2337 else if (Rm != 0xF) {
2338 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2339 return MCDisassembler::Fail;
2345 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2346 uint64_t Address, const void *Decoder) {
2347 DecodeStatus S = MCDisassembler::Success;
2349 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2350 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2351 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2352 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2353 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2354 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2355 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2370 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2371 return MCDisassembler::Fail;
2372 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2373 return MCDisassembler::Fail;
2374 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2375 return MCDisassembler::Fail;
2376 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2377 return MCDisassembler::Fail;
2379 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2380 return MCDisassembler::Fail;
2383 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2384 return MCDisassembler::Fail;
2385 Inst.addOperand(MCOperand::CreateImm(align));
2388 Inst.addOperand(MCOperand::CreateReg(0));
2389 else if (Rm != 0xF) {
2390 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2391 return MCDisassembler::Fail;
2398 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2399 uint64_t Address, const void *Decoder) {
2400 DecodeStatus S = MCDisassembler::Success;
2402 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2403 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2404 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2405 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2406 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2407 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2408 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2409 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2412 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2413 return MCDisassembler::Fail;
2415 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2416 return MCDisassembler::Fail;
2419 Inst.addOperand(MCOperand::CreateImm(imm));
2421 switch (Inst.getOpcode()) {
2422 case ARM::VORRiv4i16:
2423 case ARM::VORRiv2i32:
2424 case ARM::VBICiv4i16:
2425 case ARM::VBICiv2i32:
2426 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2427 return MCDisassembler::Fail;
2429 case ARM::VORRiv8i16:
2430 case ARM::VORRiv4i32:
2431 case ARM::VBICiv8i16:
2432 case ARM::VBICiv4i32:
2433 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2434 return MCDisassembler::Fail;
2443 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2444 uint64_t Address, const void *Decoder) {
2445 DecodeStatus S = MCDisassembler::Success;
2447 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2448 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2449 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2450 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2451 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2453 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2454 return MCDisassembler::Fail;
2455 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2456 return MCDisassembler::Fail;
2457 Inst.addOperand(MCOperand::CreateImm(8 << size));
2462 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2463 uint64_t Address, const void *Decoder) {
2464 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2465 return MCDisassembler::Success;
2468 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2469 uint64_t Address, const void *Decoder) {
2470 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2471 return MCDisassembler::Success;
2474 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2475 uint64_t Address, const void *Decoder) {
2476 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2477 return MCDisassembler::Success;
2480 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2481 uint64_t Address, const void *Decoder) {
2482 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2483 return MCDisassembler::Success;
2486 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2487 uint64_t Address, const void *Decoder) {
2488 DecodeStatus S = MCDisassembler::Success;
2490 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2491 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2492 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2493 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2494 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2495 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2496 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2497 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2499 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2500 return MCDisassembler::Fail;
2502 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2503 return MCDisassembler::Fail; // Writeback
2506 for (unsigned i = 0; i < length; ++i) {
2507 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)))
2508 return MCDisassembler::Fail;
2511 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2512 return MCDisassembler::Fail;
2517 static DecodeStatus DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
2518 uint64_t Address, const void *Decoder) {
2519 // The immediate needs to be a fully instantiated float. However, the
2520 // auto-generated decoder is only able to fill in some of the bits
2521 // necessary. For instance, the 'b' bit is replicated multiple times,
2522 // and is even present in inverted form in one bit. We do a little
2523 // binary parsing here to fill in those missing bits, and then
2524 // reinterpret it all as a float.
2530 fp_conv.integer = Val;
2531 uint32_t b = fieldFromInstruction32(Val, 25, 1);
2532 fp_conv.integer |= b << 26;
2533 fp_conv.integer |= b << 27;
2534 fp_conv.integer |= b << 28;
2535 fp_conv.integer |= b << 29;
2536 fp_conv.integer |= (~b & 0x1) << 30;
2538 Inst.addOperand(MCOperand::CreateFPImm(fp_conv.fp));
2539 return MCDisassembler::Success;
2542 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2543 uint64_t Address, const void *Decoder) {
2544 DecodeStatus S = MCDisassembler::Success;
2546 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2547 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2549 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2550 return MCDisassembler::Fail;
2552 switch(Inst.getOpcode()) {
2554 return MCDisassembler::Fail;
2556 break; // tADR does not explicitly represent the PC as an operand.
2558 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2562 Inst.addOperand(MCOperand::CreateImm(imm));
2566 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2567 uint64_t Address, const void *Decoder) {
2568 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2569 return MCDisassembler::Success;
2572 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2573 uint64_t Address, const void *Decoder) {
2574 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2575 return MCDisassembler::Success;
2578 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2579 uint64_t Address, const void *Decoder) {
2580 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2581 return MCDisassembler::Success;
2584 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2585 uint64_t Address, const void *Decoder) {
2586 DecodeStatus S = MCDisassembler::Success;
2588 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2589 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2591 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2592 return MCDisassembler::Fail;
2593 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2594 return MCDisassembler::Fail;
2599 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2600 uint64_t Address, const void *Decoder) {
2601 DecodeStatus S = MCDisassembler::Success;
2603 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2604 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2606 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2607 return MCDisassembler::Fail;
2608 Inst.addOperand(MCOperand::CreateImm(imm));
2613 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2614 uint64_t Address, const void *Decoder) {
2615 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2617 return MCDisassembler::Success;
2620 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2621 uint64_t Address, const void *Decoder) {
2622 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2623 Inst.addOperand(MCOperand::CreateImm(Val));
2625 return MCDisassembler::Success;
2628 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2629 uint64_t Address, const void *Decoder) {
2630 DecodeStatus S = MCDisassembler::Success;
2632 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2633 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2634 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2636 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2637 return MCDisassembler::Fail;
2638 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2639 return MCDisassembler::Fail;
2640 Inst.addOperand(MCOperand::CreateImm(imm));
2645 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2646 uint64_t Address, const void *Decoder) {
2647 DecodeStatus S = MCDisassembler::Success;
2649 switch (Inst.getOpcode()) {
2655 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2656 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2657 return MCDisassembler::Fail;
2661 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2663 switch (Inst.getOpcode()) {
2665 Inst.setOpcode(ARM::t2LDRBpci);
2668 Inst.setOpcode(ARM::t2LDRHpci);
2671 Inst.setOpcode(ARM::t2LDRSHpci);
2674 Inst.setOpcode(ARM::t2LDRSBpci);
2677 Inst.setOpcode(ARM::t2PLDi12);
2678 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2681 return MCDisassembler::Fail;
2684 int imm = fieldFromInstruction32(Insn, 0, 12);
2685 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2686 Inst.addOperand(MCOperand::CreateImm(imm));
2691 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2692 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2693 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2694 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2695 return MCDisassembler::Fail;
2700 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2701 uint64_t Address, const void *Decoder) {
2702 int imm = Val & 0xFF;
2703 if (!(Val & 0x100)) imm *= -1;
2704 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2706 return MCDisassembler::Success;
2709 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2710 uint64_t Address, const void *Decoder) {
2711 DecodeStatus S = MCDisassembler::Success;
2713 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2714 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2716 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2717 return MCDisassembler::Fail;
2718 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2719 return MCDisassembler::Fail;
2724 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
2725 uint64_t Address, const void *Decoder) {
2726 DecodeStatus S = MCDisassembler::Success;
2728 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
2729 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2731 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2732 return MCDisassembler::Fail;
2734 Inst.addOperand(MCOperand::CreateImm(imm));
2739 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2740 uint64_t Address, const void *Decoder) {
2741 int imm = Val & 0xFF;
2744 else if (!(Val & 0x100))
2746 Inst.addOperand(MCOperand::CreateImm(imm));
2748 return MCDisassembler::Success;
2752 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2753 uint64_t Address, const void *Decoder) {
2754 DecodeStatus S = MCDisassembler::Success;
2756 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2757 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2759 // Some instructions always use an additive offset.
2760 switch (Inst.getOpcode()) {
2775 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2776 return MCDisassembler::Fail;
2777 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2778 return MCDisassembler::Fail;
2783 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn,
2784 uint64_t Address, const void *Decoder) {
2785 DecodeStatus S = MCDisassembler::Success;
2787 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2788 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2789 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
2790 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
2792 unsigned load = fieldFromInstruction32(Insn, 20, 1);
2795 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2796 return MCDisassembler::Fail;
2799 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2800 return MCDisassembler::Fail;
2803 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2804 return MCDisassembler::Fail;
2807 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
2808 return MCDisassembler::Fail;
2813 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2814 uint64_t Address, const void *Decoder) {
2815 DecodeStatus S = MCDisassembler::Success;
2817 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2818 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2820 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2821 return MCDisassembler::Fail;
2822 Inst.addOperand(MCOperand::CreateImm(imm));
2828 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2829 uint64_t Address, const void *Decoder) {
2830 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2832 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2833 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2834 Inst.addOperand(MCOperand::CreateImm(imm));
2836 return MCDisassembler::Success;
2839 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2840 uint64_t Address, const void *Decoder) {
2841 DecodeStatus S = MCDisassembler::Success;
2843 if (Inst.getOpcode() == ARM::tADDrSP) {
2844 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2845 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2847 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2848 return MCDisassembler::Fail;
2849 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2850 return MCDisassembler::Fail;
2851 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2852 } else if (Inst.getOpcode() == ARM::tADDspr) {
2853 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2855 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2856 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2857 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2858 return MCDisassembler::Fail;
2864 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2865 uint64_t Address, const void *Decoder) {
2866 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2867 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2869 Inst.addOperand(MCOperand::CreateImm(imod));
2870 Inst.addOperand(MCOperand::CreateImm(flags));
2872 return MCDisassembler::Success;
2875 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
2876 uint64_t Address, const void *Decoder) {
2877 DecodeStatus S = MCDisassembler::Success;
2878 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2879 unsigned add = fieldFromInstruction32(Insn, 4, 1);
2881 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2882 return MCDisassembler::Fail;
2883 Inst.addOperand(MCOperand::CreateImm(add));
2888 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
2889 uint64_t Address, const void *Decoder) {
2890 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2891 return MCDisassembler::Success;
2894 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
2895 uint64_t Address, const void *Decoder) {
2896 if (Val == 0xA || Val == 0xB)
2897 return MCDisassembler::Fail;
2899 Inst.addOperand(MCOperand::CreateImm(Val));
2900 return MCDisassembler::Success;
2904 DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Insn,
2905 uint64_t Address, const void *Decoder) {
2906 DecodeStatus S = MCDisassembler::Success;
2908 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2909 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2911 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
2912 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2913 return MCDisassembler::Fail;
2914 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2915 return MCDisassembler::Fail;
2920 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
2921 uint64_t Address, const void *Decoder) {
2922 DecodeStatus S = MCDisassembler::Success;
2924 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2925 if (pred == 0xE || pred == 0xF) {
2926 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
2929 return MCDisassembler::Fail;
2931 Inst.setOpcode(ARM::t2DSB);
2934 Inst.setOpcode(ARM::t2DMB);
2937 Inst.setOpcode(ARM::t2ISB);
2941 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2942 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
2945 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
2946 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
2947 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
2948 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
2949 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
2951 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
2952 return MCDisassembler::Fail;
2953 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2954 return MCDisassembler::Fail;
2959 // Decode a shifted immediate operand. These basically consist
2960 // of an 8-bit value, and a 4-bit directive that specifies either
2961 // a splat operation or a rotation.
2962 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
2963 uint64_t Address, const void *Decoder) {
2964 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
2966 unsigned byte = fieldFromInstruction32(Val, 8, 2);
2967 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2970 Inst.addOperand(MCOperand::CreateImm(imm));
2973 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
2976 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
2979 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
2984 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
2985 unsigned rot = fieldFromInstruction32(Val, 7, 5);
2986 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
2987 Inst.addOperand(MCOperand::CreateImm(imm));
2990 return MCDisassembler::Success;
2994 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
2995 uint64_t Address, const void *Decoder){
2996 Inst.addOperand(MCOperand::CreateImm(Val << 1));
2997 return MCDisassembler::Success;
3000 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
3001 uint64_t Address, const void *Decoder){
3002 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
3003 return MCDisassembler::Success;
3006 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
3007 uint64_t Address, const void *Decoder) {
3010 return MCDisassembler::Fail;
3022 Inst.addOperand(MCOperand::CreateImm(Val));
3023 return MCDisassembler::Success;
3026 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
3027 uint64_t Address, const void *Decoder) {
3028 if (!Val) return MCDisassembler::Fail;
3029 Inst.addOperand(MCOperand::CreateImm(Val));
3030 return MCDisassembler::Success;
3033 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
3034 uint64_t Address, const void *Decoder) {
3035 DecodeStatus S = MCDisassembler::Success;
3037 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3038 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3039 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3041 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3043 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3044 return MCDisassembler::Fail;
3045 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3046 return MCDisassembler::Fail;
3047 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3048 return MCDisassembler::Fail;
3049 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3050 return MCDisassembler::Fail;
3056 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
3057 uint64_t Address, const void *Decoder){
3058 DecodeStatus S = MCDisassembler::Success;
3060 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3061 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3062 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3063 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3065 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3066 return MCDisassembler::Fail;
3068 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3069 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3071 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3072 return MCDisassembler::Fail;
3073 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3074 return MCDisassembler::Fail;
3075 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3076 return MCDisassembler::Fail;
3077 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3078 return MCDisassembler::Fail;
3083 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
3084 uint64_t Address, const void *Decoder) {
3085 DecodeStatus S = MCDisassembler::Success;
3087 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3088 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3089 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3090 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3091 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3092 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3094 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3096 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3097 return MCDisassembler::Fail;
3098 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3099 return MCDisassembler::Fail;
3100 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3101 return MCDisassembler::Fail;
3102 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3103 return MCDisassembler::Fail;
3108 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
3109 uint64_t Address, const void *Decoder) {
3110 DecodeStatus S = MCDisassembler::Success;
3112 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3113 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3114 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3115 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3116 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3117 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3118 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3120 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3121 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3123 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3124 return MCDisassembler::Fail;
3125 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3126 return MCDisassembler::Fail;
3127 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3128 return MCDisassembler::Fail;
3129 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3130 return MCDisassembler::Fail;
3136 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3137 uint64_t Address, const void *Decoder) {
3138 DecodeStatus S = MCDisassembler::Success;
3140 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3141 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3142 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3143 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3144 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3145 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3147 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3149 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3150 return MCDisassembler::Fail;
3151 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3152 return MCDisassembler::Fail;
3153 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3154 return MCDisassembler::Fail;
3155 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3156 return MCDisassembler::Fail;
3161 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3162 uint64_t Address, const void *Decoder) {
3163 DecodeStatus S = MCDisassembler::Success;
3165 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3166 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3167 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3168 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3169 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3170 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3172 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3174 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3175 return MCDisassembler::Fail;
3176 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3177 return MCDisassembler::Fail;
3178 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3179 return MCDisassembler::Fail;
3180 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3181 return MCDisassembler::Fail;
3186 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3187 uint64_t Address, const void *Decoder) {
3188 DecodeStatus S = MCDisassembler::Success;
3190 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3191 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3192 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3193 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3194 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3200 return MCDisassembler::Fail;
3202 if (fieldFromInstruction32(Insn, 4, 1))
3203 return MCDisassembler::Fail; // UNDEFINED
3204 index = fieldFromInstruction32(Insn, 5, 3);
3207 if (fieldFromInstruction32(Insn, 5, 1))
3208 return MCDisassembler::Fail; // UNDEFINED
3209 index = fieldFromInstruction32(Insn, 6, 2);
3210 if (fieldFromInstruction32(Insn, 4, 1))
3214 if (fieldFromInstruction32(Insn, 6, 1))
3215 return MCDisassembler::Fail; // UNDEFINED
3216 index = fieldFromInstruction32(Insn, 7, 1);
3217 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3221 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3222 return MCDisassembler::Fail;
3223 if (Rm != 0xF) { // Writeback
3224 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3225 return MCDisassembler::Fail;
3227 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3228 return MCDisassembler::Fail;
3229 Inst.addOperand(MCOperand::CreateImm(align));
3232 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3233 return MCDisassembler::Fail;
3235 Inst.addOperand(MCOperand::CreateReg(0));
3238 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3239 return MCDisassembler::Fail;
3240 Inst.addOperand(MCOperand::CreateImm(index));
3245 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3246 uint64_t Address, const void *Decoder) {
3247 DecodeStatus S = MCDisassembler::Success;
3249 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3250 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3251 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3252 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3253 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3259 return MCDisassembler::Fail;
3261 if (fieldFromInstruction32(Insn, 4, 1))
3262 return MCDisassembler::Fail; // UNDEFINED
3263 index = fieldFromInstruction32(Insn, 5, 3);
3266 if (fieldFromInstruction32(Insn, 5, 1))
3267 return MCDisassembler::Fail; // UNDEFINED
3268 index = fieldFromInstruction32(Insn, 6, 2);
3269 if (fieldFromInstruction32(Insn, 4, 1))
3273 if (fieldFromInstruction32(Insn, 6, 1))
3274 return MCDisassembler::Fail; // UNDEFINED
3275 index = fieldFromInstruction32(Insn, 7, 1);
3276 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3280 if (Rm != 0xF) { // Writeback
3281 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3282 return MCDisassembler::Fail;
3284 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3285 return MCDisassembler::Fail;
3286 Inst.addOperand(MCOperand::CreateImm(align));
3289 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3290 return MCDisassembler::Fail;
3292 Inst.addOperand(MCOperand::CreateReg(0));
3295 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3296 return MCDisassembler::Fail;
3297 Inst.addOperand(MCOperand::CreateImm(index));
3303 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3304 uint64_t Address, const void *Decoder) {
3305 DecodeStatus S = MCDisassembler::Success;
3307 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3308 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3309 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3310 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3311 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3318 return MCDisassembler::Fail;
3320 index = fieldFromInstruction32(Insn, 5, 3);
3321 if (fieldFromInstruction32(Insn, 4, 1))
3325 index = fieldFromInstruction32(Insn, 6, 2);
3326 if (fieldFromInstruction32(Insn, 4, 1))
3328 if (fieldFromInstruction32(Insn, 5, 1))
3332 if (fieldFromInstruction32(Insn, 5, 1))
3333 return MCDisassembler::Fail; // UNDEFINED
3334 index = fieldFromInstruction32(Insn, 7, 1);
3335 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3337 if (fieldFromInstruction32(Insn, 6, 1))
3342 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3343 return MCDisassembler::Fail;
3344 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3345 return MCDisassembler::Fail;
3346 if (Rm != 0xF) { // Writeback
3347 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3348 return MCDisassembler::Fail;
3350 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3351 return MCDisassembler::Fail;
3352 Inst.addOperand(MCOperand::CreateImm(align));
3355 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3356 return MCDisassembler::Fail;
3358 Inst.addOperand(MCOperand::CreateReg(0));
3361 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3362 return MCDisassembler::Fail;
3363 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3364 return MCDisassembler::Fail;
3365 Inst.addOperand(MCOperand::CreateImm(index));
3370 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3371 uint64_t Address, const void *Decoder) {
3372 DecodeStatus S = MCDisassembler::Success;
3374 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3375 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3376 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3377 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3378 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3385 return MCDisassembler::Fail;
3387 index = fieldFromInstruction32(Insn, 5, 3);
3388 if (fieldFromInstruction32(Insn, 4, 1))
3392 index = fieldFromInstruction32(Insn, 6, 2);
3393 if (fieldFromInstruction32(Insn, 4, 1))
3395 if (fieldFromInstruction32(Insn, 5, 1))
3399 if (fieldFromInstruction32(Insn, 5, 1))
3400 return MCDisassembler::Fail; // UNDEFINED
3401 index = fieldFromInstruction32(Insn, 7, 1);
3402 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3404 if (fieldFromInstruction32(Insn, 6, 1))
3409 if (Rm != 0xF) { // Writeback
3410 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3411 return MCDisassembler::Fail;
3413 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3414 return MCDisassembler::Fail;
3415 Inst.addOperand(MCOperand::CreateImm(align));
3418 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3419 return MCDisassembler::Fail;
3421 Inst.addOperand(MCOperand::CreateReg(0));
3424 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3425 return MCDisassembler::Fail;
3426 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3427 return MCDisassembler::Fail;
3428 Inst.addOperand(MCOperand::CreateImm(index));
3434 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3435 uint64_t Address, const void *Decoder) {
3436 DecodeStatus S = MCDisassembler::Success;
3438 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3439 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3440 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3441 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3442 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3449 return MCDisassembler::Fail;
3451 if (fieldFromInstruction32(Insn, 4, 1))
3452 return MCDisassembler::Fail; // UNDEFINED
3453 index = fieldFromInstruction32(Insn, 5, 3);
3456 if (fieldFromInstruction32(Insn, 4, 1))
3457 return MCDisassembler::Fail; // UNDEFINED
3458 index = fieldFromInstruction32(Insn, 6, 2);
3459 if (fieldFromInstruction32(Insn, 5, 1))
3463 if (fieldFromInstruction32(Insn, 4, 2))
3464 return MCDisassembler::Fail; // UNDEFINED
3465 index = fieldFromInstruction32(Insn, 7, 1);
3466 if (fieldFromInstruction32(Insn, 6, 1))
3471 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3472 return MCDisassembler::Fail;
3473 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3474 return MCDisassembler::Fail;
3475 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3476 return MCDisassembler::Fail;
3478 if (Rm != 0xF) { // Writeback
3479 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3480 return MCDisassembler::Fail;
3482 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3483 return MCDisassembler::Fail;
3484 Inst.addOperand(MCOperand::CreateImm(align));
3487 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3488 return MCDisassembler::Fail;
3490 Inst.addOperand(MCOperand::CreateReg(0));
3493 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3494 return MCDisassembler::Fail;
3495 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3496 return MCDisassembler::Fail;
3497 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3498 return MCDisassembler::Fail;
3499 Inst.addOperand(MCOperand::CreateImm(index));
3504 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3505 uint64_t Address, const void *Decoder) {
3506 DecodeStatus S = MCDisassembler::Success;
3508 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3509 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3510 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3511 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3512 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3519 return MCDisassembler::Fail;
3521 if (fieldFromInstruction32(Insn, 4, 1))
3522 return MCDisassembler::Fail; // UNDEFINED
3523 index = fieldFromInstruction32(Insn, 5, 3);
3526 if (fieldFromInstruction32(Insn, 4, 1))
3527 return MCDisassembler::Fail; // UNDEFINED
3528 index = fieldFromInstruction32(Insn, 6, 2);
3529 if (fieldFromInstruction32(Insn, 5, 1))
3533 if (fieldFromInstruction32(Insn, 4, 2))
3534 return MCDisassembler::Fail; // UNDEFINED
3535 index = fieldFromInstruction32(Insn, 7, 1);
3536 if (fieldFromInstruction32(Insn, 6, 1))
3541 if (Rm != 0xF) { // Writeback
3542 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3543 return MCDisassembler::Fail;
3545 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3546 return MCDisassembler::Fail;
3547 Inst.addOperand(MCOperand::CreateImm(align));
3550 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3551 return MCDisassembler::Fail;
3553 Inst.addOperand(MCOperand::CreateReg(0));
3556 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3557 return MCDisassembler::Fail;
3558 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3559 return MCDisassembler::Fail;
3560 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3561 return MCDisassembler::Fail;
3562 Inst.addOperand(MCOperand::CreateImm(index));
3568 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3569 uint64_t Address, const void *Decoder) {
3570 DecodeStatus S = MCDisassembler::Success;
3572 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3573 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3574 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3575 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3576 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3583 return MCDisassembler::Fail;
3585 if (fieldFromInstruction32(Insn, 4, 1))
3587 index = fieldFromInstruction32(Insn, 5, 3);
3590 if (fieldFromInstruction32(Insn, 4, 1))
3592 index = fieldFromInstruction32(Insn, 6, 2);
3593 if (fieldFromInstruction32(Insn, 5, 1))
3597 if (fieldFromInstruction32(Insn, 4, 2))
3598 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3599 index = fieldFromInstruction32(Insn, 7, 1);
3600 if (fieldFromInstruction32(Insn, 6, 1))
3605 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3606 return MCDisassembler::Fail;
3607 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3608 return MCDisassembler::Fail;
3609 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3610 return MCDisassembler::Fail;
3611 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3612 return MCDisassembler::Fail;
3614 if (Rm != 0xF) { // Writeback
3615 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3616 return MCDisassembler::Fail;
3618 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3619 return MCDisassembler::Fail;
3620 Inst.addOperand(MCOperand::CreateImm(align));
3623 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3624 return MCDisassembler::Fail;
3626 Inst.addOperand(MCOperand::CreateReg(0));
3629 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3630 return MCDisassembler::Fail;
3631 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3632 return MCDisassembler::Fail;
3633 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3634 return MCDisassembler::Fail;
3635 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3636 return MCDisassembler::Fail;
3637 Inst.addOperand(MCOperand::CreateImm(index));
3642 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3643 uint64_t Address, const void *Decoder) {
3644 DecodeStatus S = MCDisassembler::Success;
3646 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3647 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3648 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3649 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3650 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3657 return MCDisassembler::Fail;
3659 if (fieldFromInstruction32(Insn, 4, 1))
3661 index = fieldFromInstruction32(Insn, 5, 3);
3664 if (fieldFromInstruction32(Insn, 4, 1))
3666 index = fieldFromInstruction32(Insn, 6, 2);
3667 if (fieldFromInstruction32(Insn, 5, 1))
3671 if (fieldFromInstruction32(Insn, 4, 2))
3672 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3673 index = fieldFromInstruction32(Insn, 7, 1);
3674 if (fieldFromInstruction32(Insn, 6, 1))
3679 if (Rm != 0xF) { // Writeback
3680 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3681 return MCDisassembler::Fail;
3683 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3684 return MCDisassembler::Fail;
3685 Inst.addOperand(MCOperand::CreateImm(align));
3688 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3689 return MCDisassembler::Fail;
3691 Inst.addOperand(MCOperand::CreateReg(0));
3694 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3695 return MCDisassembler::Fail;
3696 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3697 return MCDisassembler::Fail;
3698 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3699 return MCDisassembler::Fail;
3700 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3701 return MCDisassembler::Fail;
3702 Inst.addOperand(MCOperand::CreateImm(index));
3707 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
3708 uint64_t Address, const void *Decoder) {
3709 DecodeStatus S = MCDisassembler::Success;
3710 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3711 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3712 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3713 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3714 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3716 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3717 S = MCDisassembler::SoftFail;
3719 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3720 return MCDisassembler::Fail;
3721 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3722 return MCDisassembler::Fail;
3723 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3724 return MCDisassembler::Fail;
3725 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3726 return MCDisassembler::Fail;
3727 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3728 return MCDisassembler::Fail;
3733 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3734 uint64_t Address, const void *Decoder) {
3735 DecodeStatus S = MCDisassembler::Success;
3736 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3737 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3738 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3739 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3740 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3742 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3743 S = MCDisassembler::SoftFail;
3745 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3746 return MCDisassembler::Fail;
3747 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3748 return MCDisassembler::Fail;
3749 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3750 return MCDisassembler::Fail;
3751 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3752 return MCDisassembler::Fail;
3753 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3754 return MCDisassembler::Fail;
3759 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3760 uint64_t Address, const void *Decoder) {
3761 DecodeStatus S = MCDisassembler::Success;
3762 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3763 // The InstPrinter needs to have the low bit of the predicate in
3764 // the mask operand to be able to print it properly.
3765 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3769 S = MCDisassembler::SoftFail;
3772 if ((mask & 0xF) == 0) {
3773 // Preserve the high bit of the mask, which is the low bit of
3777 S = MCDisassembler::SoftFail;
3780 Inst.addOperand(MCOperand::CreateImm(pred));
3781 Inst.addOperand(MCOperand::CreateImm(mask));
3786 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3787 uint64_t Address, const void *Decoder) {
3788 DecodeStatus S = MCDisassembler::Success;
3790 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3791 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3792 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3793 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3794 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3795 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3796 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3797 bool writeback = (W == 1) | (P == 0);
3799 addr |= (U << 8) | (Rn << 9);
3801 if (writeback && (Rn == Rt || Rn == Rt2))
3802 Check(S, MCDisassembler::SoftFail);
3804 Check(S, MCDisassembler::SoftFail);
3807 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3808 return MCDisassembler::Fail;
3810 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3811 return MCDisassembler::Fail;
3812 // Writeback operand
3813 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3814 return MCDisassembler::Fail;
3816 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3817 return MCDisassembler::Fail;
3823 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3824 uint64_t Address, const void *Decoder) {
3825 DecodeStatus S = MCDisassembler::Success;
3827 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3828 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3829 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3830 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3831 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3832 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3833 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3834 bool writeback = (W == 1) | (P == 0);
3836 addr |= (U << 8) | (Rn << 9);
3838 if (writeback && (Rn == Rt || Rn == Rt2))
3839 Check(S, MCDisassembler::SoftFail);
3841 // Writeback operand
3842 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3843 return MCDisassembler::Fail;
3845 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3846 return MCDisassembler::Fail;
3848 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3849 return MCDisassembler::Fail;
3851 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3852 return MCDisassembler::Fail;
3857 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn,
3858 uint64_t Address, const void *Decoder) {
3859 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
3860 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
3861 if (sign1 != sign2) return MCDisassembler::Fail;
3863 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
3864 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
3865 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
3867 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
3869 return MCDisassembler::Success;