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 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Val,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeT2LDRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeT2STRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, unsigned Val,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Val,
307 uint64_t Address, const void *Decoder);
310 #include "ARMGenDisassemblerTables.inc"
311 #include "ARMGenInstrInfo.inc"
312 #include "ARMGenEDInfo.inc"
314 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
315 return new ARMDisassembler(STI);
318 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
319 return new ThumbDisassembler(STI);
322 EDInstInfo *ARMDisassembler::getEDInfo() const {
326 EDInstInfo *ThumbDisassembler::getEDInfo() const {
330 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
331 const MemoryObject &Region,
334 raw_ostream &cs) const {
337 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
338 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
340 // We want to read exactly 4 bytes of data.
341 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
343 return MCDisassembler::Fail;
346 // Encoded as a small-endian 32-bit word in the stream.
347 uint32_t insn = (bytes[3] << 24) |
352 // Calling the auto-generated decoder function.
353 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
354 if (result != MCDisassembler::Fail) {
359 // VFP and NEON instructions, similarly, are shared between ARM
362 result = decodeVFPInstruction32(MI, insn, Address, this, STI);
363 if (result != MCDisassembler::Fail) {
369 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
370 if (result != MCDisassembler::Fail) {
372 // Add a fake predicate operand, because we share these instruction
373 // definitions with Thumb2 where these instructions are predicable.
374 if (!DecodePredicateOperand(MI, 0xE, Address, this))
375 return MCDisassembler::Fail;
380 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
381 if (result != MCDisassembler::Fail) {
383 // Add a fake predicate operand, because we share these instruction
384 // definitions with Thumb2 where these instructions are predicable.
385 if (!DecodePredicateOperand(MI, 0xE, Address, this))
386 return MCDisassembler::Fail;
391 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
392 if (result != MCDisassembler::Fail) {
394 // Add a fake predicate operand, because we share these instruction
395 // definitions with Thumb2 where these instructions are predicable.
396 if (!DecodePredicateOperand(MI, 0xE, Address, this))
397 return MCDisassembler::Fail;
404 return MCDisassembler::Fail;
408 extern MCInstrDesc ARMInsts[];
411 // Thumb1 instructions don't have explicit S bits. Rather, they
412 // implicitly set CPSR. Since it's not represented in the encoding, the
413 // auto-generated decoder won't inject the CPSR operand. We need to fix
414 // that as a post-pass.
415 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
416 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
417 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
418 MCInst::iterator I = MI.begin();
419 for (unsigned i = 0; i < NumOps; ++i, ++I) {
420 if (I == MI.end()) break;
421 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
422 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
423 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
428 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
431 // Most Thumb instructions don't have explicit predicates in the
432 // encoding, but rather get their predicates from IT context. We need
433 // to fix up the predicate operands using this context information as a
435 MCDisassembler::DecodeStatus
436 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
437 MCDisassembler::DecodeStatus S = Success;
439 // A few instructions actually have predicates encoded in them. Don't
440 // try to overwrite it if we're seeing one of those.
441 switch (MI.getOpcode()) {
446 // Some instructions (mostly conditional branches) are not
447 // allowed in IT blocks.
448 if (!ITBlock.empty())
455 // Some instructions (mostly unconditional branches) can
456 // only appears at the end of, or outside of, an IT.
457 if (ITBlock.size() > 1)
464 // If we're in an IT block, base the predicate on that. Otherwise,
465 // assume a predicate of AL.
467 if (!ITBlock.empty()) {
475 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
476 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
477 MCInst::iterator I = MI.begin();
478 for (unsigned i = 0; i < NumOps; ++i, ++I) {
479 if (I == MI.end()) break;
480 if (OpInfo[i].isPredicate()) {
481 I = MI.insert(I, MCOperand::CreateImm(CC));
484 MI.insert(I, MCOperand::CreateReg(0));
486 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
491 I = MI.insert(I, MCOperand::CreateImm(CC));
494 MI.insert(I, MCOperand::CreateReg(0));
496 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
501 // Thumb VFP instructions are a special case. Because we share their
502 // encodings between ARM and Thumb modes, and they are predicable in ARM
503 // mode, the auto-generated decoder will give them an (incorrect)
504 // predicate operand. We need to rewrite these operands based on the IT
505 // context as a post-pass.
506 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
508 if (!ITBlock.empty()) {
514 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
515 MCInst::iterator I = MI.begin();
516 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
517 for (unsigned i = 0; i < NumOps; ++i, ++I) {
518 if (OpInfo[i].isPredicate() ) {
524 I->setReg(ARM::CPSR);
530 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
531 const MemoryObject &Region,
534 raw_ostream &cs) const {
537 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
538 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
540 // We want to read exactly 2 bytes of data.
541 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
543 return MCDisassembler::Fail;
546 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
547 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
548 if (result != MCDisassembler::Fail) {
550 Check(result, AddThumbPredicate(MI));
555 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
558 bool InITBlock = !ITBlock.empty();
559 Check(result, AddThumbPredicate(MI));
560 AddThumb1SBit(MI, InITBlock);
565 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
566 if (result != MCDisassembler::Fail) {
568 Check(result, AddThumbPredicate(MI));
570 // If we find an IT instruction, we need to parse its condition
571 // code and mask operands so that we can apply them correctly
572 // to the subsequent instructions.
573 if (MI.getOpcode() == ARM::t2IT) {
574 // Nested IT blocks are UNPREDICTABLE.
575 if (!ITBlock.empty())
576 return MCDisassembler::SoftFail;
578 // (3 - the number of trailing zeros) is the number of then / else.
579 unsigned firstcond = MI.getOperand(0).getImm();
580 unsigned Mask = MI.getOperand(1).getImm();
581 unsigned CondBit0 = Mask >> 4 & 1;
582 unsigned NumTZ = CountTrailingZeros_32(Mask);
583 assert(NumTZ <= 3 && "Invalid IT mask!");
584 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
585 bool T = ((Mask >> Pos) & 1) == CondBit0;
587 ITBlock.insert(ITBlock.begin(), firstcond);
589 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
592 ITBlock.push_back(firstcond);
598 // We want to read exactly 4 bytes of data.
599 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
601 return MCDisassembler::Fail;
604 uint32_t insn32 = (bytes[3] << 8) |
609 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
610 if (result != MCDisassembler::Fail) {
612 bool InITBlock = ITBlock.size();
613 Check(result, AddThumbPredicate(MI));
614 AddThumb1SBit(MI, InITBlock);
619 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
620 if (result != MCDisassembler::Fail) {
622 Check(result, AddThumbPredicate(MI));
627 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
628 if (result != MCDisassembler::Fail) {
630 UpdateThumbVFPPredicate(MI);
635 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
636 if (result != MCDisassembler::Fail) {
638 Check(result, AddThumbPredicate(MI));
642 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
644 uint32_t NEONLdStInsn = insn32;
645 NEONLdStInsn &= 0xF0FFFFFF;
646 NEONLdStInsn |= 0x04000000;
647 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
648 if (result != MCDisassembler::Fail) {
650 Check(result, AddThumbPredicate(MI));
655 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
657 uint32_t NEONDataInsn = insn32;
658 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
659 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
660 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
661 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
662 if (result != MCDisassembler::Fail) {
664 Check(result, AddThumbPredicate(MI));
670 return MCDisassembler::Fail;
674 extern "C" void LLVMInitializeARMDisassembler() {
675 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
676 createARMDisassembler);
677 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
678 createThumbDisassembler);
681 static const unsigned GPRDecoderTable[] = {
682 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
683 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
684 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
685 ARM::R12, ARM::SP, ARM::LR, ARM::PC
688 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
689 uint64_t Address, const void *Decoder) {
691 return MCDisassembler::Fail;
693 unsigned Register = GPRDecoderTable[RegNo];
694 Inst.addOperand(MCOperand::CreateReg(Register));
695 return MCDisassembler::Success;
699 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
700 uint64_t Address, const void *Decoder) {
701 if (RegNo == 15) return MCDisassembler::Fail;
702 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
705 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
706 uint64_t Address, const void *Decoder) {
708 return MCDisassembler::Fail;
709 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
712 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
713 uint64_t Address, const void *Decoder) {
714 unsigned Register = 0;
735 return MCDisassembler::Fail;
738 Inst.addOperand(MCOperand::CreateReg(Register));
739 return MCDisassembler::Success;
742 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
743 uint64_t Address, const void *Decoder) {
744 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
745 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
748 static const unsigned SPRDecoderTable[] = {
749 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
750 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
751 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
752 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
753 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
754 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
755 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
756 ARM::S28, ARM::S29, ARM::S30, ARM::S31
759 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
760 uint64_t Address, const void *Decoder) {
762 return MCDisassembler::Fail;
764 unsigned Register = SPRDecoderTable[RegNo];
765 Inst.addOperand(MCOperand::CreateReg(Register));
766 return MCDisassembler::Success;
769 static const unsigned DPRDecoderTable[] = {
770 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
771 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
772 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
773 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
774 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
775 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
776 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
777 ARM::D28, ARM::D29, ARM::D30, ARM::D31
780 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
781 uint64_t Address, const void *Decoder) {
783 return MCDisassembler::Fail;
785 unsigned Register = DPRDecoderTable[RegNo];
786 Inst.addOperand(MCOperand::CreateReg(Register));
787 return MCDisassembler::Success;
790 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
791 uint64_t Address, const void *Decoder) {
793 return MCDisassembler::Fail;
794 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
798 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
799 uint64_t Address, const void *Decoder) {
801 return MCDisassembler::Fail;
802 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
805 static const unsigned QPRDecoderTable[] = {
806 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
807 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
808 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
809 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
813 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
814 uint64_t Address, const void *Decoder) {
816 return MCDisassembler::Fail;
819 unsigned Register = QPRDecoderTable[RegNo];
820 Inst.addOperand(MCOperand::CreateReg(Register));
821 return MCDisassembler::Success;
824 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
825 uint64_t Address, const void *Decoder) {
826 if (Val == 0xF) return MCDisassembler::Fail;
827 // AL predicate is not allowed on Thumb1 branches.
828 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
829 return MCDisassembler::Fail;
830 Inst.addOperand(MCOperand::CreateImm(Val));
831 if (Val == ARMCC::AL) {
832 Inst.addOperand(MCOperand::CreateReg(0));
834 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
835 return MCDisassembler::Success;
838 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
839 uint64_t Address, const void *Decoder) {
841 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
843 Inst.addOperand(MCOperand::CreateReg(0));
844 return MCDisassembler::Success;
847 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
848 uint64_t Address, const void *Decoder) {
849 uint32_t imm = Val & 0xFF;
850 uint32_t rot = (Val & 0xF00) >> 7;
851 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
852 Inst.addOperand(MCOperand::CreateImm(rot_imm));
853 return MCDisassembler::Success;
856 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
857 uint64_t Address, const void *Decoder) {
858 DecodeStatus S = MCDisassembler::Success;
860 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
861 unsigned type = fieldFromInstruction32(Val, 5, 2);
862 unsigned imm = fieldFromInstruction32(Val, 7, 5);
864 // Register-immediate
865 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
866 return MCDisassembler::Fail;
868 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
884 if (Shift == ARM_AM::ror && imm == 0)
887 unsigned Op = Shift | (imm << 3);
888 Inst.addOperand(MCOperand::CreateImm(Op));
893 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
894 uint64_t Address, const void *Decoder) {
895 DecodeStatus S = MCDisassembler::Success;
897 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
898 unsigned type = fieldFromInstruction32(Val, 5, 2);
899 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
902 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
903 return MCDisassembler::Fail;
904 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
905 return MCDisassembler::Fail;
907 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
923 Inst.addOperand(MCOperand::CreateImm(Shift));
928 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
929 uint64_t Address, const void *Decoder) {
930 DecodeStatus S = MCDisassembler::Success;
932 bool writebackLoad = false;
933 unsigned writebackReg = 0;
934 switch (Inst.getOpcode()) {
941 case ARM::t2LDMIA_UPD:
942 case ARM::t2LDMDB_UPD:
943 writebackLoad = true;
944 writebackReg = Inst.getOperand(0).getReg();
948 // Empty register lists are not allowed.
949 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
950 for (unsigned i = 0; i < 16; ++i) {
951 if (Val & (1 << i)) {
952 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
953 return MCDisassembler::Fail;
954 // Writeback not allowed if Rn is in the target list.
955 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
956 Check(S, MCDisassembler::SoftFail);
963 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
964 uint64_t Address, const void *Decoder) {
965 DecodeStatus S = MCDisassembler::Success;
967 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
968 unsigned regs = Val & 0xFF;
970 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
971 return MCDisassembler::Fail;
972 for (unsigned i = 0; i < (regs - 1); ++i) {
973 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
974 return MCDisassembler::Fail;
980 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
981 uint64_t Address, const void *Decoder) {
982 DecodeStatus S = MCDisassembler::Success;
984 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
985 unsigned regs = (Val & 0xFF) / 2;
987 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
988 return MCDisassembler::Fail;
989 for (unsigned i = 0; i < (regs - 1); ++i) {
990 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
991 return MCDisassembler::Fail;
997 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
998 uint64_t Address, const void *Decoder) {
999 // This operand encodes a mask of contiguous zeros between a specified MSB
1000 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1001 // the mask of all bits LSB-and-lower, and then xor them to create
1002 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1003 // create the final mask.
1004 unsigned msb = fieldFromInstruction32(Val, 5, 5);
1005 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
1007 DecodeStatus S = MCDisassembler::Success;
1008 if (lsb > msb) Check(S, MCDisassembler::SoftFail);
1010 uint32_t msb_mask = 0xFFFFFFFF;
1011 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1012 uint32_t lsb_mask = (1U << lsb) - 1;
1014 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1018 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
1019 uint64_t Address, const void *Decoder) {
1020 DecodeStatus S = MCDisassembler::Success;
1022 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1023 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
1024 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
1025 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
1026 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1027 unsigned U = fieldFromInstruction32(Insn, 23, 1);
1029 switch (Inst.getOpcode()) {
1030 case ARM::LDC_OFFSET:
1033 case ARM::LDC_OPTION:
1034 case ARM::LDCL_OFFSET:
1036 case ARM::LDCL_POST:
1037 case ARM::LDCL_OPTION:
1038 case ARM::STC_OFFSET:
1041 case ARM::STC_OPTION:
1042 case ARM::STCL_OFFSET:
1044 case ARM::STCL_POST:
1045 case ARM::STCL_OPTION:
1046 case ARM::t2LDC_OFFSET:
1047 case ARM::t2LDC_PRE:
1048 case ARM::t2LDC_POST:
1049 case ARM::t2LDC_OPTION:
1050 case ARM::t2LDCL_OFFSET:
1051 case ARM::t2LDCL_PRE:
1052 case ARM::t2LDCL_POST:
1053 case ARM::t2LDCL_OPTION:
1054 case ARM::t2STC_OFFSET:
1055 case ARM::t2STC_PRE:
1056 case ARM::t2STC_POST:
1057 case ARM::t2STC_OPTION:
1058 case ARM::t2STCL_OFFSET:
1059 case ARM::t2STCL_PRE:
1060 case ARM::t2STCL_POST:
1061 case ARM::t2STCL_OPTION:
1062 if (coproc == 0xA || coproc == 0xB)
1063 return MCDisassembler::Fail;
1069 Inst.addOperand(MCOperand::CreateImm(coproc));
1070 Inst.addOperand(MCOperand::CreateImm(CRd));
1071 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1072 return MCDisassembler::Fail;
1073 switch (Inst.getOpcode()) {
1074 case ARM::LDC_OPTION:
1075 case ARM::LDCL_OPTION:
1076 case ARM::LDC2_OPTION:
1077 case ARM::LDC2L_OPTION:
1078 case ARM::STC_OPTION:
1079 case ARM::STCL_OPTION:
1080 case ARM::STC2_OPTION:
1081 case ARM::STC2L_OPTION:
1082 case ARM::LDCL_POST:
1083 case ARM::STCL_POST:
1084 case ARM::LDC2L_POST:
1085 case ARM::STC2L_POST:
1086 case ARM::t2LDC_OPTION:
1087 case ARM::t2LDCL_OPTION:
1088 case ARM::t2STC_OPTION:
1089 case ARM::t2STCL_OPTION:
1090 case ARM::t2LDCL_POST:
1091 case ARM::t2STCL_POST:
1094 Inst.addOperand(MCOperand::CreateReg(0));
1098 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1099 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1101 bool writeback = (P == 0) || (W == 1);
1102 unsigned idx_mode = 0;
1104 idx_mode = ARMII::IndexModePre;
1105 else if (!P && writeback)
1106 idx_mode = ARMII::IndexModePost;
1108 switch (Inst.getOpcode()) {
1109 case ARM::LDCL_POST:
1110 case ARM::STCL_POST:
1111 case ARM::t2LDCL_POST:
1112 case ARM::t2STCL_POST:
1113 case ARM::LDC2L_POST:
1114 case ARM::STC2L_POST:
1116 case ARM::LDC_OPTION:
1117 case ARM::LDCL_OPTION:
1118 case ARM::LDC2_OPTION:
1119 case ARM::LDC2L_OPTION:
1120 case ARM::STC_OPTION:
1121 case ARM::STCL_OPTION:
1122 case ARM::STC2_OPTION:
1123 case ARM::STC2L_OPTION:
1124 case ARM::t2LDC_OPTION:
1125 case ARM::t2LDCL_OPTION:
1126 case ARM::t2STC_OPTION:
1127 case ARM::t2STCL_OPTION:
1128 Inst.addOperand(MCOperand::CreateImm(imm));
1132 Inst.addOperand(MCOperand::CreateImm(
1133 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
1135 Inst.addOperand(MCOperand::CreateImm(
1136 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
1140 switch (Inst.getOpcode()) {
1141 case ARM::LDC_OFFSET:
1144 case ARM::LDC_OPTION:
1145 case ARM::LDCL_OFFSET:
1147 case ARM::LDCL_POST:
1148 case ARM::LDCL_OPTION:
1149 case ARM::STC_OFFSET:
1152 case ARM::STC_OPTION:
1153 case ARM::STCL_OFFSET:
1155 case ARM::STCL_POST:
1156 case ARM::STCL_OPTION:
1157 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1158 return MCDisassembler::Fail;
1168 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1169 uint64_t Address, const void *Decoder) {
1170 DecodeStatus S = MCDisassembler::Success;
1172 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1173 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1174 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1175 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1176 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1177 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1178 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1179 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1181 // On stores, the writeback operand precedes Rt.
1182 switch (Inst.getOpcode()) {
1183 case ARM::STR_POST_IMM:
1184 case ARM::STR_POST_REG:
1185 case ARM::STRB_POST_IMM:
1186 case ARM::STRB_POST_REG:
1187 case ARM::STRT_POST_REG:
1188 case ARM::STRT_POST_IMM:
1189 case ARM::STRBT_POST_REG:
1190 case ARM::STRBT_POST_IMM:
1191 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1192 return MCDisassembler::Fail;
1198 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1199 return MCDisassembler::Fail;
1201 // On loads, the writeback operand comes after Rt.
1202 switch (Inst.getOpcode()) {
1203 case ARM::LDR_POST_IMM:
1204 case ARM::LDR_POST_REG:
1205 case ARM::LDRB_POST_IMM:
1206 case ARM::LDRB_POST_REG:
1207 case ARM::LDRBT_POST_REG:
1208 case ARM::LDRBT_POST_IMM:
1209 case ARM::LDRT_POST_REG:
1210 case ARM::LDRT_POST_IMM:
1211 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1212 return MCDisassembler::Fail;
1218 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1219 return MCDisassembler::Fail;
1221 ARM_AM::AddrOpc Op = ARM_AM::add;
1222 if (!fieldFromInstruction32(Insn, 23, 1))
1225 bool writeback = (P == 0) || (W == 1);
1226 unsigned idx_mode = 0;
1228 idx_mode = ARMII::IndexModePre;
1229 else if (!P && writeback)
1230 idx_mode = ARMII::IndexModePost;
1232 if (writeback && (Rn == 15 || Rn == Rt))
1233 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1236 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1237 return MCDisassembler::Fail;
1238 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1239 switch( fieldFromInstruction32(Insn, 5, 2)) {
1253 return MCDisassembler::Fail;
1255 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1256 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1258 Inst.addOperand(MCOperand::CreateImm(imm));
1260 Inst.addOperand(MCOperand::CreateReg(0));
1261 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1262 Inst.addOperand(MCOperand::CreateImm(tmp));
1265 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1266 return MCDisassembler::Fail;
1271 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1272 uint64_t Address, const void *Decoder) {
1273 DecodeStatus S = MCDisassembler::Success;
1275 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1276 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1277 unsigned type = fieldFromInstruction32(Val, 5, 2);
1278 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1279 unsigned U = fieldFromInstruction32(Val, 12, 1);
1281 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1297 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1298 return MCDisassembler::Fail;
1299 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1300 return MCDisassembler::Fail;
1303 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1305 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1306 Inst.addOperand(MCOperand::CreateImm(shift));
1312 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1313 uint64_t Address, const void *Decoder) {
1314 DecodeStatus S = MCDisassembler::Success;
1316 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1317 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1318 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1319 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1320 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1321 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1322 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1323 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1324 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1326 bool writeback = (W == 1) | (P == 0);
1328 // For {LD,ST}RD, Rt must be even, else undefined.
1329 switch (Inst.getOpcode()) {
1332 case ARM::STRD_POST:
1335 case ARM::LDRD_POST:
1336 if (Rt & 0x1) return MCDisassembler::Fail;
1342 if (writeback) { // Writeback
1344 U |= ARMII::IndexModePre << 9;
1346 U |= ARMII::IndexModePost << 9;
1348 // On stores, the writeback operand precedes Rt.
1349 switch (Inst.getOpcode()) {
1352 case ARM::STRD_POST:
1355 case ARM::STRH_POST:
1356 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1357 return MCDisassembler::Fail;
1364 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1365 return MCDisassembler::Fail;
1366 switch (Inst.getOpcode()) {
1369 case ARM::STRD_POST:
1372 case ARM::LDRD_POST:
1373 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1374 return MCDisassembler::Fail;
1381 // On loads, the writeback operand comes after Rt.
1382 switch (Inst.getOpcode()) {
1385 case ARM::LDRD_POST:
1388 case ARM::LDRH_POST:
1390 case ARM::LDRSH_PRE:
1391 case ARM::LDRSH_POST:
1393 case ARM::LDRSB_PRE:
1394 case ARM::LDRSB_POST:
1397 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1398 return MCDisassembler::Fail;
1405 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1406 return MCDisassembler::Fail;
1409 Inst.addOperand(MCOperand::CreateReg(0));
1410 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1412 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1413 return MCDisassembler::Fail;
1414 Inst.addOperand(MCOperand::CreateImm(U));
1417 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1418 return MCDisassembler::Fail;
1423 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1424 uint64_t Address, const void *Decoder) {
1425 DecodeStatus S = MCDisassembler::Success;
1427 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1428 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1445 Inst.addOperand(MCOperand::CreateImm(mode));
1446 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1447 return MCDisassembler::Fail;
1452 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1454 uint64_t Address, const void *Decoder) {
1455 DecodeStatus S = MCDisassembler::Success;
1457 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1458 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1459 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1462 switch (Inst.getOpcode()) {
1464 Inst.setOpcode(ARM::RFEDA);
1466 case ARM::LDMDA_UPD:
1467 Inst.setOpcode(ARM::RFEDA_UPD);
1470 Inst.setOpcode(ARM::RFEDB);
1472 case ARM::LDMDB_UPD:
1473 Inst.setOpcode(ARM::RFEDB_UPD);
1476 Inst.setOpcode(ARM::RFEIA);
1478 case ARM::LDMIA_UPD:
1479 Inst.setOpcode(ARM::RFEIA_UPD);
1482 Inst.setOpcode(ARM::RFEIB);
1484 case ARM::LDMIB_UPD:
1485 Inst.setOpcode(ARM::RFEIB_UPD);
1488 Inst.setOpcode(ARM::SRSDA);
1490 case ARM::STMDA_UPD:
1491 Inst.setOpcode(ARM::SRSDA_UPD);
1494 Inst.setOpcode(ARM::SRSDB);
1496 case ARM::STMDB_UPD:
1497 Inst.setOpcode(ARM::SRSDB_UPD);
1500 Inst.setOpcode(ARM::SRSIA);
1502 case ARM::STMIA_UPD:
1503 Inst.setOpcode(ARM::SRSIA_UPD);
1506 Inst.setOpcode(ARM::SRSIB);
1508 case ARM::STMIB_UPD:
1509 Inst.setOpcode(ARM::SRSIB_UPD);
1512 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1515 // For stores (which become SRS's, the only operand is the mode.
1516 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1518 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1522 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1525 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1526 return MCDisassembler::Fail;
1527 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1528 return MCDisassembler::Fail; // Tied
1529 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1530 return MCDisassembler::Fail;
1531 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1532 return MCDisassembler::Fail;
1537 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1538 uint64_t Address, const void *Decoder) {
1539 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1540 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1541 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1542 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1544 DecodeStatus S = MCDisassembler::Success;
1546 // imod == '01' --> UNPREDICTABLE
1547 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1548 // return failure here. The '01' imod value is unprintable, so there's
1549 // nothing useful we could do even if we returned UNPREDICTABLE.
1551 if (imod == 1) return MCDisassembler::Fail;
1554 Inst.setOpcode(ARM::CPS3p);
1555 Inst.addOperand(MCOperand::CreateImm(imod));
1556 Inst.addOperand(MCOperand::CreateImm(iflags));
1557 Inst.addOperand(MCOperand::CreateImm(mode));
1558 } else if (imod && !M) {
1559 Inst.setOpcode(ARM::CPS2p);
1560 Inst.addOperand(MCOperand::CreateImm(imod));
1561 Inst.addOperand(MCOperand::CreateImm(iflags));
1562 if (mode) S = MCDisassembler::SoftFail;
1563 } else if (!imod && M) {
1564 Inst.setOpcode(ARM::CPS1p);
1565 Inst.addOperand(MCOperand::CreateImm(mode));
1566 if (iflags) S = MCDisassembler::SoftFail;
1568 // imod == '00' && M == '0' --> UNPREDICTABLE
1569 Inst.setOpcode(ARM::CPS1p);
1570 Inst.addOperand(MCOperand::CreateImm(mode));
1571 S = MCDisassembler::SoftFail;
1577 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1578 uint64_t Address, const void *Decoder) {
1579 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1580 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1581 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1582 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1584 DecodeStatus S = MCDisassembler::Success;
1586 // imod == '01' --> UNPREDICTABLE
1587 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1588 // return failure here. The '01' imod value is unprintable, so there's
1589 // nothing useful we could do even if we returned UNPREDICTABLE.
1591 if (imod == 1) return MCDisassembler::Fail;
1594 Inst.setOpcode(ARM::t2CPS3p);
1595 Inst.addOperand(MCOperand::CreateImm(imod));
1596 Inst.addOperand(MCOperand::CreateImm(iflags));
1597 Inst.addOperand(MCOperand::CreateImm(mode));
1598 } else if (imod && !M) {
1599 Inst.setOpcode(ARM::t2CPS2p);
1600 Inst.addOperand(MCOperand::CreateImm(imod));
1601 Inst.addOperand(MCOperand::CreateImm(iflags));
1602 if (mode) S = MCDisassembler::SoftFail;
1603 } else if (!imod && M) {
1604 Inst.setOpcode(ARM::t2CPS1p);
1605 Inst.addOperand(MCOperand::CreateImm(mode));
1606 if (iflags) S = MCDisassembler::SoftFail;
1608 // imod == '00' && M == '0' --> UNPREDICTABLE
1609 Inst.setOpcode(ARM::t2CPS1p);
1610 Inst.addOperand(MCOperand::CreateImm(mode));
1611 S = MCDisassembler::SoftFail;
1618 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1619 uint64_t Address, const void *Decoder) {
1620 DecodeStatus S = MCDisassembler::Success;
1622 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1623 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1624 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1625 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1626 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1629 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1631 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1632 return MCDisassembler::Fail;
1633 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1634 return MCDisassembler::Fail;
1635 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1636 return MCDisassembler::Fail;
1637 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1638 return MCDisassembler::Fail;
1640 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1641 return MCDisassembler::Fail;
1646 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1647 uint64_t Address, const void *Decoder) {
1648 DecodeStatus S = MCDisassembler::Success;
1650 unsigned add = fieldFromInstruction32(Val, 12, 1);
1651 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1652 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1654 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1655 return MCDisassembler::Fail;
1657 if (!add) imm *= -1;
1658 if (imm == 0 && !add) imm = INT32_MIN;
1659 Inst.addOperand(MCOperand::CreateImm(imm));
1664 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1665 uint64_t Address, const void *Decoder) {
1666 DecodeStatus S = MCDisassembler::Success;
1668 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1669 unsigned U = fieldFromInstruction32(Val, 8, 1);
1670 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1672 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1673 return MCDisassembler::Fail;
1676 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1678 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1683 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1684 uint64_t Address, const void *Decoder) {
1685 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1689 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1690 uint64_t Address, const void *Decoder) {
1691 DecodeStatus S = MCDisassembler::Success;
1693 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1694 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1697 Inst.setOpcode(ARM::BLXi);
1698 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1699 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1703 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1704 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1705 return MCDisassembler::Fail;
1711 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1712 uint64_t Address, const void *Decoder) {
1713 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1714 return MCDisassembler::Success;
1717 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1718 uint64_t Address, const void *Decoder) {
1719 DecodeStatus S = MCDisassembler::Success;
1721 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1722 unsigned align = fieldFromInstruction32(Val, 4, 2);
1724 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1725 return MCDisassembler::Fail;
1727 Inst.addOperand(MCOperand::CreateImm(0));
1729 Inst.addOperand(MCOperand::CreateImm(4 << align));
1734 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1735 uint64_t Address, const void *Decoder) {
1736 DecodeStatus S = MCDisassembler::Success;
1738 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1739 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1740 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1741 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1742 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1743 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1745 // First output register
1746 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1747 return MCDisassembler::Fail;
1749 // Second output register
1750 switch (Inst.getOpcode()) {
1755 case ARM::VLD1q8_UPD:
1756 case ARM::VLD1q16_UPD:
1757 case ARM::VLD1q32_UPD:
1758 case ARM::VLD1q64_UPD:
1763 case ARM::VLD1d8T_UPD:
1764 case ARM::VLD1d16T_UPD:
1765 case ARM::VLD1d32T_UPD:
1766 case ARM::VLD1d64T_UPD:
1771 case ARM::VLD1d8Q_UPD:
1772 case ARM::VLD1d16Q_UPD:
1773 case ARM::VLD1d32Q_UPD:
1774 case ARM::VLD1d64Q_UPD:
1778 case ARM::VLD2d8_UPD:
1779 case ARM::VLD2d16_UPD:
1780 case ARM::VLD2d32_UPD:
1784 case ARM::VLD2q8_UPD:
1785 case ARM::VLD2q16_UPD:
1786 case ARM::VLD2q32_UPD:
1790 case ARM::VLD3d8_UPD:
1791 case ARM::VLD3d16_UPD:
1792 case ARM::VLD3d32_UPD:
1796 case ARM::VLD4d8_UPD:
1797 case ARM::VLD4d16_UPD:
1798 case ARM::VLD4d32_UPD:
1799 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
1800 return MCDisassembler::Fail;
1805 case ARM::VLD2b8_UPD:
1806 case ARM::VLD2b16_UPD:
1807 case ARM::VLD2b32_UPD:
1811 case ARM::VLD3q8_UPD:
1812 case ARM::VLD3q16_UPD:
1813 case ARM::VLD3q32_UPD:
1817 case ARM::VLD4q8_UPD:
1818 case ARM::VLD4q16_UPD:
1819 case ARM::VLD4q32_UPD:
1820 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1821 return MCDisassembler::Fail;
1826 // Third output register
1827 switch(Inst.getOpcode()) {
1832 case ARM::VLD1d8T_UPD:
1833 case ARM::VLD1d16T_UPD:
1834 case ARM::VLD1d32T_UPD:
1835 case ARM::VLD1d64T_UPD:
1840 case ARM::VLD1d8Q_UPD:
1841 case ARM::VLD1d16Q_UPD:
1842 case ARM::VLD1d32Q_UPD:
1843 case ARM::VLD1d64Q_UPD:
1847 case ARM::VLD2q8_UPD:
1848 case ARM::VLD2q16_UPD:
1849 case ARM::VLD2q32_UPD:
1853 case ARM::VLD3d8_UPD:
1854 case ARM::VLD3d16_UPD:
1855 case ARM::VLD3d32_UPD:
1859 case ARM::VLD4d8_UPD:
1860 case ARM::VLD4d16_UPD:
1861 case ARM::VLD4d32_UPD:
1862 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1863 return MCDisassembler::Fail;
1868 case ARM::VLD3q8_UPD:
1869 case ARM::VLD3q16_UPD:
1870 case ARM::VLD3q32_UPD:
1874 case ARM::VLD4q8_UPD:
1875 case ARM::VLD4q16_UPD:
1876 case ARM::VLD4q32_UPD:
1877 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
1878 return MCDisassembler::Fail;
1884 // Fourth output register
1885 switch (Inst.getOpcode()) {
1890 case ARM::VLD1d8Q_UPD:
1891 case ARM::VLD1d16Q_UPD:
1892 case ARM::VLD1d32Q_UPD:
1893 case ARM::VLD1d64Q_UPD:
1897 case ARM::VLD2q8_UPD:
1898 case ARM::VLD2q16_UPD:
1899 case ARM::VLD2q32_UPD:
1903 case ARM::VLD4d8_UPD:
1904 case ARM::VLD4d16_UPD:
1905 case ARM::VLD4d32_UPD:
1906 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
1907 return MCDisassembler::Fail;
1912 case ARM::VLD4q8_UPD:
1913 case ARM::VLD4q16_UPD:
1914 case ARM::VLD4q32_UPD:
1915 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
1916 return MCDisassembler::Fail;
1922 // Writeback operand
1923 switch (Inst.getOpcode()) {
1924 case ARM::VLD1d8_UPD:
1925 case ARM::VLD1d16_UPD:
1926 case ARM::VLD1d32_UPD:
1927 case ARM::VLD1d64_UPD:
1928 case ARM::VLD1q8_UPD:
1929 case ARM::VLD1q16_UPD:
1930 case ARM::VLD1q32_UPD:
1931 case ARM::VLD1q64_UPD:
1932 case ARM::VLD1d8T_UPD:
1933 case ARM::VLD1d16T_UPD:
1934 case ARM::VLD1d32T_UPD:
1935 case ARM::VLD1d64T_UPD:
1936 case ARM::VLD1d8Q_UPD:
1937 case ARM::VLD1d16Q_UPD:
1938 case ARM::VLD1d32Q_UPD:
1939 case ARM::VLD1d64Q_UPD:
1940 case ARM::VLD2d8_UPD:
1941 case ARM::VLD2d16_UPD:
1942 case ARM::VLD2d32_UPD:
1943 case ARM::VLD2q8_UPD:
1944 case ARM::VLD2q16_UPD:
1945 case ARM::VLD2q32_UPD:
1946 case ARM::VLD2b8_UPD:
1947 case ARM::VLD2b16_UPD:
1948 case ARM::VLD2b32_UPD:
1949 case ARM::VLD3d8_UPD:
1950 case ARM::VLD3d16_UPD:
1951 case ARM::VLD3d32_UPD:
1952 case ARM::VLD3q8_UPD:
1953 case ARM::VLD3q16_UPD:
1954 case ARM::VLD3q32_UPD:
1955 case ARM::VLD4d8_UPD:
1956 case ARM::VLD4d16_UPD:
1957 case ARM::VLD4d32_UPD:
1958 case ARM::VLD4q8_UPD:
1959 case ARM::VLD4q16_UPD:
1960 case ARM::VLD4q32_UPD:
1961 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
1962 return MCDisassembler::Fail;
1968 // AddrMode6 Base (register+alignment)
1969 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
1970 return MCDisassembler::Fail;
1972 // AddrMode6 Offset (register)
1974 Inst.addOperand(MCOperand::CreateReg(0));
1975 else if (Rm != 0xF) {
1976 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1977 return MCDisassembler::Fail;
1983 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
1984 uint64_t Address, const void *Decoder) {
1985 DecodeStatus S = MCDisassembler::Success;
1987 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1988 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1989 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1990 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1991 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1992 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1994 // Writeback Operand
1995 switch (Inst.getOpcode()) {
1996 case ARM::VST1d8_UPD:
1997 case ARM::VST1d16_UPD:
1998 case ARM::VST1d32_UPD:
1999 case ARM::VST1d64_UPD:
2000 case ARM::VST1q8_UPD:
2001 case ARM::VST1q16_UPD:
2002 case ARM::VST1q32_UPD:
2003 case ARM::VST1q64_UPD:
2004 case ARM::VST1d8T_UPD:
2005 case ARM::VST1d16T_UPD:
2006 case ARM::VST1d32T_UPD:
2007 case ARM::VST1d64T_UPD:
2008 case ARM::VST1d8Q_UPD:
2009 case ARM::VST1d16Q_UPD:
2010 case ARM::VST1d32Q_UPD:
2011 case ARM::VST1d64Q_UPD:
2012 case ARM::VST2d8_UPD:
2013 case ARM::VST2d16_UPD:
2014 case ARM::VST2d32_UPD:
2015 case ARM::VST2q8_UPD:
2016 case ARM::VST2q16_UPD:
2017 case ARM::VST2q32_UPD:
2018 case ARM::VST2b8_UPD:
2019 case ARM::VST2b16_UPD:
2020 case ARM::VST2b32_UPD:
2021 case ARM::VST3d8_UPD:
2022 case ARM::VST3d16_UPD:
2023 case ARM::VST3d32_UPD:
2024 case ARM::VST3q8_UPD:
2025 case ARM::VST3q16_UPD:
2026 case ARM::VST3q32_UPD:
2027 case ARM::VST4d8_UPD:
2028 case ARM::VST4d16_UPD:
2029 case ARM::VST4d32_UPD:
2030 case ARM::VST4q8_UPD:
2031 case ARM::VST4q16_UPD:
2032 case ARM::VST4q32_UPD:
2033 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2034 return MCDisassembler::Fail;
2040 // AddrMode6 Base (register+alignment)
2041 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2042 return MCDisassembler::Fail;
2044 // AddrMode6 Offset (register)
2046 Inst.addOperand(MCOperand::CreateReg(0));
2047 else if (Rm != 0xF) {
2048 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2049 return MCDisassembler::Fail;
2052 // First input register
2053 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2054 return MCDisassembler::Fail;
2056 // Second input register
2057 switch (Inst.getOpcode()) {
2062 case ARM::VST1q8_UPD:
2063 case ARM::VST1q16_UPD:
2064 case ARM::VST1q32_UPD:
2065 case ARM::VST1q64_UPD:
2070 case ARM::VST1d8T_UPD:
2071 case ARM::VST1d16T_UPD:
2072 case ARM::VST1d32T_UPD:
2073 case ARM::VST1d64T_UPD:
2078 case ARM::VST1d8Q_UPD:
2079 case ARM::VST1d16Q_UPD:
2080 case ARM::VST1d32Q_UPD:
2081 case ARM::VST1d64Q_UPD:
2085 case ARM::VST2d8_UPD:
2086 case ARM::VST2d16_UPD:
2087 case ARM::VST2d32_UPD:
2091 case ARM::VST2q8_UPD:
2092 case ARM::VST2q16_UPD:
2093 case ARM::VST2q32_UPD:
2097 case ARM::VST3d8_UPD:
2098 case ARM::VST3d16_UPD:
2099 case ARM::VST3d32_UPD:
2103 case ARM::VST4d8_UPD:
2104 case ARM::VST4d16_UPD:
2105 case ARM::VST4d32_UPD:
2106 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2107 return MCDisassembler::Fail;
2112 case ARM::VST2b8_UPD:
2113 case ARM::VST2b16_UPD:
2114 case ARM::VST2b32_UPD:
2118 case ARM::VST3q8_UPD:
2119 case ARM::VST3q16_UPD:
2120 case ARM::VST3q32_UPD:
2124 case ARM::VST4q8_UPD:
2125 case ARM::VST4q16_UPD:
2126 case ARM::VST4q32_UPD:
2127 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2128 return MCDisassembler::Fail;
2134 // Third input register
2135 switch (Inst.getOpcode()) {
2140 case ARM::VST1d8T_UPD:
2141 case ARM::VST1d16T_UPD:
2142 case ARM::VST1d32T_UPD:
2143 case ARM::VST1d64T_UPD:
2148 case ARM::VST1d8Q_UPD:
2149 case ARM::VST1d16Q_UPD:
2150 case ARM::VST1d32Q_UPD:
2151 case ARM::VST1d64Q_UPD:
2155 case ARM::VST2q8_UPD:
2156 case ARM::VST2q16_UPD:
2157 case ARM::VST2q32_UPD:
2161 case ARM::VST3d8_UPD:
2162 case ARM::VST3d16_UPD:
2163 case ARM::VST3d32_UPD:
2167 case ARM::VST4d8_UPD:
2168 case ARM::VST4d16_UPD:
2169 case ARM::VST4d32_UPD:
2170 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2171 return MCDisassembler::Fail;
2176 case ARM::VST3q8_UPD:
2177 case ARM::VST3q16_UPD:
2178 case ARM::VST3q32_UPD:
2182 case ARM::VST4q8_UPD:
2183 case ARM::VST4q16_UPD:
2184 case ARM::VST4q32_UPD:
2185 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2186 return MCDisassembler::Fail;
2192 // Fourth input register
2193 switch (Inst.getOpcode()) {
2198 case ARM::VST1d8Q_UPD:
2199 case ARM::VST1d16Q_UPD:
2200 case ARM::VST1d32Q_UPD:
2201 case ARM::VST1d64Q_UPD:
2205 case ARM::VST2q8_UPD:
2206 case ARM::VST2q16_UPD:
2207 case ARM::VST2q32_UPD:
2211 case ARM::VST4d8_UPD:
2212 case ARM::VST4d16_UPD:
2213 case ARM::VST4d32_UPD:
2214 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2215 return MCDisassembler::Fail;
2220 case ARM::VST4q8_UPD:
2221 case ARM::VST4q16_UPD:
2222 case ARM::VST4q32_UPD:
2223 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2224 return MCDisassembler::Fail;
2233 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2234 uint64_t Address, const void *Decoder) {
2235 DecodeStatus S = MCDisassembler::Success;
2237 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2238 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2239 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2240 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2241 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2242 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2243 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
2245 align *= (1 << size);
2247 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2248 return MCDisassembler::Fail;
2250 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2251 return MCDisassembler::Fail;
2254 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2255 return MCDisassembler::Fail;
2258 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2259 return MCDisassembler::Fail;
2260 Inst.addOperand(MCOperand::CreateImm(align));
2263 Inst.addOperand(MCOperand::CreateReg(0));
2264 else if (Rm != 0xF) {
2265 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2266 return MCDisassembler::Fail;
2272 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2273 uint64_t Address, const void *Decoder) {
2274 DecodeStatus S = MCDisassembler::Success;
2276 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2277 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2278 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2279 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2280 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2281 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2282 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2285 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2286 return MCDisassembler::Fail;
2287 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2288 return MCDisassembler::Fail;
2290 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2291 return MCDisassembler::Fail;
2294 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2295 return MCDisassembler::Fail;
2296 Inst.addOperand(MCOperand::CreateImm(align));
2299 Inst.addOperand(MCOperand::CreateReg(0));
2300 else if (Rm != 0xF) {
2301 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2302 return MCDisassembler::Fail;
2308 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2309 uint64_t Address, const void *Decoder) {
2310 DecodeStatus S = MCDisassembler::Success;
2312 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2313 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2314 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2315 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2316 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2318 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2319 return MCDisassembler::Fail;
2320 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2321 return MCDisassembler::Fail;
2322 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2323 return MCDisassembler::Fail;
2325 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2326 return MCDisassembler::Fail;
2329 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2330 return MCDisassembler::Fail;
2331 Inst.addOperand(MCOperand::CreateImm(0));
2334 Inst.addOperand(MCOperand::CreateReg(0));
2335 else if (Rm != 0xF) {
2336 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2337 return MCDisassembler::Fail;
2343 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2344 uint64_t Address, const void *Decoder) {
2345 DecodeStatus S = MCDisassembler::Success;
2347 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2348 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2349 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2350 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2351 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2352 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2353 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2368 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2369 return MCDisassembler::Fail;
2370 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2371 return MCDisassembler::Fail;
2372 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2373 return MCDisassembler::Fail;
2374 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2375 return MCDisassembler::Fail;
2377 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2378 return MCDisassembler::Fail;
2381 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2382 return MCDisassembler::Fail;
2383 Inst.addOperand(MCOperand::CreateImm(align));
2386 Inst.addOperand(MCOperand::CreateReg(0));
2387 else if (Rm != 0xF) {
2388 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2389 return MCDisassembler::Fail;
2396 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2397 uint64_t Address, const void *Decoder) {
2398 DecodeStatus S = MCDisassembler::Success;
2400 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2401 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2402 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2403 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2404 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2405 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2406 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2407 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2410 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2411 return MCDisassembler::Fail;
2413 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2414 return MCDisassembler::Fail;
2417 Inst.addOperand(MCOperand::CreateImm(imm));
2419 switch (Inst.getOpcode()) {
2420 case ARM::VORRiv4i16:
2421 case ARM::VORRiv2i32:
2422 case ARM::VBICiv4i16:
2423 case ARM::VBICiv2i32:
2424 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2425 return MCDisassembler::Fail;
2427 case ARM::VORRiv8i16:
2428 case ARM::VORRiv4i32:
2429 case ARM::VBICiv8i16:
2430 case ARM::VBICiv4i32:
2431 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2432 return MCDisassembler::Fail;
2441 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2442 uint64_t Address, const void *Decoder) {
2443 DecodeStatus S = MCDisassembler::Success;
2445 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2446 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2447 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2448 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2449 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2451 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2452 return MCDisassembler::Fail;
2453 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2454 return MCDisassembler::Fail;
2455 Inst.addOperand(MCOperand::CreateImm(8 << size));
2460 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2461 uint64_t Address, const void *Decoder) {
2462 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2463 return MCDisassembler::Success;
2466 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2467 uint64_t Address, const void *Decoder) {
2468 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2469 return MCDisassembler::Success;
2472 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2473 uint64_t Address, const void *Decoder) {
2474 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2475 return MCDisassembler::Success;
2478 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2479 uint64_t Address, const void *Decoder) {
2480 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2481 return MCDisassembler::Success;
2484 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2485 uint64_t Address, const void *Decoder) {
2486 DecodeStatus S = MCDisassembler::Success;
2488 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2489 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2490 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2491 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2492 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2493 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2494 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2495 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2497 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2498 return MCDisassembler::Fail;
2500 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2501 return MCDisassembler::Fail; // Writeback
2504 for (unsigned i = 0; i < length; ++i) {
2505 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)))
2506 return MCDisassembler::Fail;
2509 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2510 return MCDisassembler::Fail;
2515 static DecodeStatus DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
2516 uint64_t Address, const void *Decoder) {
2517 // The immediate needs to be a fully instantiated float. However, the
2518 // auto-generated decoder is only able to fill in some of the bits
2519 // necessary. For instance, the 'b' bit is replicated multiple times,
2520 // and is even present in inverted form in one bit. We do a little
2521 // binary parsing here to fill in those missing bits, and then
2522 // reinterpret it all as a float.
2528 fp_conv.integer = Val;
2529 uint32_t b = fieldFromInstruction32(Val, 25, 1);
2530 fp_conv.integer |= b << 26;
2531 fp_conv.integer |= b << 27;
2532 fp_conv.integer |= b << 28;
2533 fp_conv.integer |= b << 29;
2534 fp_conv.integer |= (~b & 0x1) << 30;
2536 Inst.addOperand(MCOperand::CreateFPImm(fp_conv.fp));
2537 return MCDisassembler::Success;
2540 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2541 uint64_t Address, const void *Decoder) {
2542 DecodeStatus S = MCDisassembler::Success;
2544 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2545 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2547 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2548 return MCDisassembler::Fail;
2550 switch(Inst.getOpcode()) {
2552 return MCDisassembler::Fail;
2554 break; // tADR does not explicitly represent the PC as an operand.
2556 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2560 Inst.addOperand(MCOperand::CreateImm(imm));
2564 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2565 uint64_t Address, const void *Decoder) {
2566 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2567 return MCDisassembler::Success;
2570 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2571 uint64_t Address, const void *Decoder) {
2572 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2573 return MCDisassembler::Success;
2576 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2577 uint64_t Address, const void *Decoder) {
2578 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2579 return MCDisassembler::Success;
2582 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2583 uint64_t Address, const void *Decoder) {
2584 DecodeStatus S = MCDisassembler::Success;
2586 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2587 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2589 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2590 return MCDisassembler::Fail;
2591 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2592 return MCDisassembler::Fail;
2597 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2598 uint64_t Address, const void *Decoder) {
2599 DecodeStatus S = MCDisassembler::Success;
2601 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2602 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2604 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2605 return MCDisassembler::Fail;
2606 Inst.addOperand(MCOperand::CreateImm(imm));
2611 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2612 uint64_t Address, const void *Decoder) {
2613 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2615 return MCDisassembler::Success;
2618 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2619 uint64_t Address, const void *Decoder) {
2620 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2621 Inst.addOperand(MCOperand::CreateImm(Val));
2623 return MCDisassembler::Success;
2626 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2627 uint64_t Address, const void *Decoder) {
2628 DecodeStatus S = MCDisassembler::Success;
2630 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2631 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2632 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2634 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2635 return MCDisassembler::Fail;
2636 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2637 return MCDisassembler::Fail;
2638 Inst.addOperand(MCOperand::CreateImm(imm));
2643 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2644 uint64_t Address, const void *Decoder) {
2645 DecodeStatus S = MCDisassembler::Success;
2647 switch (Inst.getOpcode()) {
2653 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2654 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2655 return MCDisassembler::Fail;
2659 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2661 switch (Inst.getOpcode()) {
2663 Inst.setOpcode(ARM::t2LDRBpci);
2666 Inst.setOpcode(ARM::t2LDRHpci);
2669 Inst.setOpcode(ARM::t2LDRSHpci);
2672 Inst.setOpcode(ARM::t2LDRSBpci);
2675 Inst.setOpcode(ARM::t2PLDi12);
2676 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2679 return MCDisassembler::Fail;
2682 int imm = fieldFromInstruction32(Insn, 0, 12);
2683 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2684 Inst.addOperand(MCOperand::CreateImm(imm));
2689 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2690 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2691 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2692 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2693 return MCDisassembler::Fail;
2698 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2699 uint64_t Address, const void *Decoder) {
2700 int imm = Val & 0xFF;
2701 if (!(Val & 0x100)) imm *= -1;
2702 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2704 return MCDisassembler::Success;
2707 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2708 uint64_t Address, const void *Decoder) {
2709 DecodeStatus S = MCDisassembler::Success;
2711 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2712 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2714 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2715 return MCDisassembler::Fail;
2716 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2717 return MCDisassembler::Fail;
2722 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
2723 uint64_t Address, const void *Decoder) {
2724 DecodeStatus S = MCDisassembler::Success;
2726 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
2727 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2729 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2730 return MCDisassembler::Fail;
2732 Inst.addOperand(MCOperand::CreateImm(imm));
2737 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2738 uint64_t Address, const void *Decoder) {
2739 int imm = Val & 0xFF;
2742 else if (!(Val & 0x100))
2744 Inst.addOperand(MCOperand::CreateImm(imm));
2746 return MCDisassembler::Success;
2750 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2751 uint64_t Address, const void *Decoder) {
2752 DecodeStatus S = MCDisassembler::Success;
2754 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2755 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2757 // Some instructions always use an additive offset.
2758 switch (Inst.getOpcode()) {
2773 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2774 return MCDisassembler::Fail;
2775 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2776 return MCDisassembler::Fail;
2781 static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn,
2782 uint64_t Address, const void *Decoder) {
2783 DecodeStatus S = MCDisassembler::Success;
2785 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2786 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2787 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
2788 addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
2790 unsigned load = fieldFromInstruction32(Insn, 20, 1);
2793 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2794 return MCDisassembler::Fail;
2797 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
2798 return MCDisassembler::Fail;
2801 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2802 return MCDisassembler::Fail;
2805 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
2806 return MCDisassembler::Fail;
2811 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2812 uint64_t Address, const void *Decoder) {
2813 DecodeStatus S = MCDisassembler::Success;
2815 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2816 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2818 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2819 return MCDisassembler::Fail;
2820 Inst.addOperand(MCOperand::CreateImm(imm));
2826 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2827 uint64_t Address, const void *Decoder) {
2828 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2830 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2831 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2832 Inst.addOperand(MCOperand::CreateImm(imm));
2834 return MCDisassembler::Success;
2837 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2838 uint64_t Address, const void *Decoder) {
2839 DecodeStatus S = MCDisassembler::Success;
2841 if (Inst.getOpcode() == ARM::tADDrSP) {
2842 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2843 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2845 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2846 return MCDisassembler::Fail;
2847 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2848 return MCDisassembler::Fail;
2849 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2850 } else if (Inst.getOpcode() == ARM::tADDspr) {
2851 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2853 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2854 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2855 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2856 return MCDisassembler::Fail;
2862 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2863 uint64_t Address, const void *Decoder) {
2864 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2865 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2867 Inst.addOperand(MCOperand::CreateImm(imod));
2868 Inst.addOperand(MCOperand::CreateImm(flags));
2870 return MCDisassembler::Success;
2873 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
2874 uint64_t Address, const void *Decoder) {
2875 DecodeStatus S = MCDisassembler::Success;
2876 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2877 unsigned add = fieldFromInstruction32(Insn, 4, 1);
2879 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2880 return MCDisassembler::Fail;
2881 Inst.addOperand(MCOperand::CreateImm(add));
2886 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
2887 uint64_t Address, const void *Decoder) {
2888 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2889 return MCDisassembler::Success;
2892 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
2893 uint64_t Address, const void *Decoder) {
2894 if (Val == 0xA || Val == 0xB)
2895 return MCDisassembler::Fail;
2897 Inst.addOperand(MCOperand::CreateImm(Val));
2898 return MCDisassembler::Success;
2902 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
2903 uint64_t Address, const void *Decoder) {
2904 DecodeStatus S = MCDisassembler::Success;
2906 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2907 if (pred == 0xE || pred == 0xF) {
2908 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
2911 return MCDisassembler::Fail;
2913 Inst.setOpcode(ARM::t2DSB);
2916 Inst.setOpcode(ARM::t2DMB);
2919 Inst.setOpcode(ARM::t2ISB);
2923 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2924 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
2927 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
2928 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
2929 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
2930 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
2931 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
2933 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
2934 return MCDisassembler::Fail;
2935 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2936 return MCDisassembler::Fail;
2941 // Decode a shifted immediate operand. These basically consist
2942 // of an 8-bit value, and a 4-bit directive that specifies either
2943 // a splat operation or a rotation.
2944 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
2945 uint64_t Address, const void *Decoder) {
2946 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
2948 unsigned byte = fieldFromInstruction32(Val, 8, 2);
2949 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2952 Inst.addOperand(MCOperand::CreateImm(imm));
2955 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
2958 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
2961 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
2966 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
2967 unsigned rot = fieldFromInstruction32(Val, 7, 5);
2968 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
2969 Inst.addOperand(MCOperand::CreateImm(imm));
2972 return MCDisassembler::Success;
2976 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
2977 uint64_t Address, const void *Decoder){
2978 Inst.addOperand(MCOperand::CreateImm(Val << 1));
2979 return MCDisassembler::Success;
2982 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
2983 uint64_t Address, const void *Decoder){
2984 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2985 return MCDisassembler::Success;
2988 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
2989 uint64_t Address, const void *Decoder) {
2992 return MCDisassembler::Fail;
3004 Inst.addOperand(MCOperand::CreateImm(Val));
3005 return MCDisassembler::Success;
3008 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
3009 uint64_t Address, const void *Decoder) {
3010 if (!Val) return MCDisassembler::Fail;
3011 Inst.addOperand(MCOperand::CreateImm(Val));
3012 return MCDisassembler::Success;
3015 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
3016 uint64_t Address, const void *Decoder) {
3017 DecodeStatus S = MCDisassembler::Success;
3019 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3020 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3021 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3023 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3025 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3026 return MCDisassembler::Fail;
3027 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3028 return MCDisassembler::Fail;
3029 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3030 return MCDisassembler::Fail;
3031 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3032 return MCDisassembler::Fail;
3038 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
3039 uint64_t Address, const void *Decoder){
3040 DecodeStatus S = MCDisassembler::Success;
3042 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3043 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
3044 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3045 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3047 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
3048 return MCDisassembler::Fail;
3050 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3051 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3053 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3054 return MCDisassembler::Fail;
3055 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3056 return MCDisassembler::Fail;
3057 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3058 return MCDisassembler::Fail;
3059 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3060 return MCDisassembler::Fail;
3065 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
3066 uint64_t Address, const void *Decoder) {
3067 DecodeStatus S = MCDisassembler::Success;
3069 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3070 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3071 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3072 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3073 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3074 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3076 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3078 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3079 return MCDisassembler::Fail;
3080 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3081 return MCDisassembler::Fail;
3082 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3083 return MCDisassembler::Fail;
3084 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3085 return MCDisassembler::Fail;
3090 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
3091 uint64_t Address, const void *Decoder) {
3092 DecodeStatus S = MCDisassembler::Success;
3094 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3095 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3096 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3097 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3098 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3099 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3100 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3102 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3103 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3105 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3106 return MCDisassembler::Fail;
3107 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3108 return MCDisassembler::Fail;
3109 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3110 return MCDisassembler::Fail;
3111 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3112 return MCDisassembler::Fail;
3118 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3119 uint64_t Address, const void *Decoder) {
3120 DecodeStatus S = MCDisassembler::Success;
3122 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3123 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3124 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3125 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3126 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3127 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3129 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3131 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3132 return MCDisassembler::Fail;
3133 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3134 return MCDisassembler::Fail;
3135 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3136 return MCDisassembler::Fail;
3137 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3138 return MCDisassembler::Fail;
3143 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3144 uint64_t Address, const void *Decoder) {
3145 DecodeStatus S = MCDisassembler::Success;
3147 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3148 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3149 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3150 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3151 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3152 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3154 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3156 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3157 return MCDisassembler::Fail;
3158 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3159 return MCDisassembler::Fail;
3160 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3161 return MCDisassembler::Fail;
3162 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3163 return MCDisassembler::Fail;
3168 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3169 uint64_t Address, const void *Decoder) {
3170 DecodeStatus S = MCDisassembler::Success;
3172 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3173 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3174 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3175 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3176 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3182 return MCDisassembler::Fail;
3184 if (fieldFromInstruction32(Insn, 4, 1))
3185 return MCDisassembler::Fail; // UNDEFINED
3186 index = fieldFromInstruction32(Insn, 5, 3);
3189 if (fieldFromInstruction32(Insn, 5, 1))
3190 return MCDisassembler::Fail; // UNDEFINED
3191 index = fieldFromInstruction32(Insn, 6, 2);
3192 if (fieldFromInstruction32(Insn, 4, 1))
3196 if (fieldFromInstruction32(Insn, 6, 1))
3197 return MCDisassembler::Fail; // UNDEFINED
3198 index = fieldFromInstruction32(Insn, 7, 1);
3199 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3203 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3204 return MCDisassembler::Fail;
3205 if (Rm != 0xF) { // Writeback
3206 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3207 return MCDisassembler::Fail;
3209 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3210 return MCDisassembler::Fail;
3211 Inst.addOperand(MCOperand::CreateImm(align));
3214 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3215 return MCDisassembler::Fail;
3217 Inst.addOperand(MCOperand::CreateReg(0));
3220 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3221 return MCDisassembler::Fail;
3222 Inst.addOperand(MCOperand::CreateImm(index));
3227 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3228 uint64_t Address, const void *Decoder) {
3229 DecodeStatus S = MCDisassembler::Success;
3231 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3232 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3233 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3234 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3235 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3241 return MCDisassembler::Fail;
3243 if (fieldFromInstruction32(Insn, 4, 1))
3244 return MCDisassembler::Fail; // UNDEFINED
3245 index = fieldFromInstruction32(Insn, 5, 3);
3248 if (fieldFromInstruction32(Insn, 5, 1))
3249 return MCDisassembler::Fail; // UNDEFINED
3250 index = fieldFromInstruction32(Insn, 6, 2);
3251 if (fieldFromInstruction32(Insn, 4, 1))
3255 if (fieldFromInstruction32(Insn, 6, 1))
3256 return MCDisassembler::Fail; // UNDEFINED
3257 index = fieldFromInstruction32(Insn, 7, 1);
3258 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3262 if (Rm != 0xF) { // Writeback
3263 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3264 return MCDisassembler::Fail;
3266 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3267 return MCDisassembler::Fail;
3268 Inst.addOperand(MCOperand::CreateImm(align));
3271 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3272 return MCDisassembler::Fail;
3274 Inst.addOperand(MCOperand::CreateReg(0));
3277 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3278 return MCDisassembler::Fail;
3279 Inst.addOperand(MCOperand::CreateImm(index));
3285 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3286 uint64_t Address, const void *Decoder) {
3287 DecodeStatus S = MCDisassembler::Success;
3289 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3290 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3291 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3292 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3293 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3300 return MCDisassembler::Fail;
3302 index = fieldFromInstruction32(Insn, 5, 3);
3303 if (fieldFromInstruction32(Insn, 4, 1))
3307 index = fieldFromInstruction32(Insn, 6, 2);
3308 if (fieldFromInstruction32(Insn, 4, 1))
3310 if (fieldFromInstruction32(Insn, 5, 1))
3314 if (fieldFromInstruction32(Insn, 5, 1))
3315 return MCDisassembler::Fail; // UNDEFINED
3316 index = fieldFromInstruction32(Insn, 7, 1);
3317 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3319 if (fieldFromInstruction32(Insn, 6, 1))
3324 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3325 return MCDisassembler::Fail;
3326 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3327 return MCDisassembler::Fail;
3328 if (Rm != 0xF) { // Writeback
3329 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3330 return MCDisassembler::Fail;
3332 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3333 return MCDisassembler::Fail;
3334 Inst.addOperand(MCOperand::CreateImm(align));
3337 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3338 return MCDisassembler::Fail;
3340 Inst.addOperand(MCOperand::CreateReg(0));
3343 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3344 return MCDisassembler::Fail;
3345 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3346 return MCDisassembler::Fail;
3347 Inst.addOperand(MCOperand::CreateImm(index));
3352 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3353 uint64_t Address, const void *Decoder) {
3354 DecodeStatus S = MCDisassembler::Success;
3356 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3357 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3358 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3359 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3360 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3367 return MCDisassembler::Fail;
3369 index = fieldFromInstruction32(Insn, 5, 3);
3370 if (fieldFromInstruction32(Insn, 4, 1))
3374 index = fieldFromInstruction32(Insn, 6, 2);
3375 if (fieldFromInstruction32(Insn, 4, 1))
3377 if (fieldFromInstruction32(Insn, 5, 1))
3381 if (fieldFromInstruction32(Insn, 5, 1))
3382 return MCDisassembler::Fail; // UNDEFINED
3383 index = fieldFromInstruction32(Insn, 7, 1);
3384 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3386 if (fieldFromInstruction32(Insn, 6, 1))
3391 if (Rm != 0xF) { // Writeback
3392 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3393 return MCDisassembler::Fail;
3395 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3396 return MCDisassembler::Fail;
3397 Inst.addOperand(MCOperand::CreateImm(align));
3400 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3401 return MCDisassembler::Fail;
3403 Inst.addOperand(MCOperand::CreateReg(0));
3406 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3407 return MCDisassembler::Fail;
3408 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3409 return MCDisassembler::Fail;
3410 Inst.addOperand(MCOperand::CreateImm(index));
3416 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3417 uint64_t Address, const void *Decoder) {
3418 DecodeStatus S = MCDisassembler::Success;
3420 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3421 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3422 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3423 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3424 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3431 return MCDisassembler::Fail;
3433 if (fieldFromInstruction32(Insn, 4, 1))
3434 return MCDisassembler::Fail; // UNDEFINED
3435 index = fieldFromInstruction32(Insn, 5, 3);
3438 if (fieldFromInstruction32(Insn, 4, 1))
3439 return MCDisassembler::Fail; // UNDEFINED
3440 index = fieldFromInstruction32(Insn, 6, 2);
3441 if (fieldFromInstruction32(Insn, 5, 1))
3445 if (fieldFromInstruction32(Insn, 4, 2))
3446 return MCDisassembler::Fail; // UNDEFINED
3447 index = fieldFromInstruction32(Insn, 7, 1);
3448 if (fieldFromInstruction32(Insn, 6, 1))
3453 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3454 return MCDisassembler::Fail;
3455 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3456 return MCDisassembler::Fail;
3457 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3458 return MCDisassembler::Fail;
3460 if (Rm != 0xF) { // Writeback
3461 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3462 return MCDisassembler::Fail;
3464 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3465 return MCDisassembler::Fail;
3466 Inst.addOperand(MCOperand::CreateImm(align));
3469 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3470 return MCDisassembler::Fail;
3472 Inst.addOperand(MCOperand::CreateReg(0));
3475 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3476 return MCDisassembler::Fail;
3477 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3478 return MCDisassembler::Fail;
3479 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3480 return MCDisassembler::Fail;
3481 Inst.addOperand(MCOperand::CreateImm(index));
3486 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3487 uint64_t Address, const void *Decoder) {
3488 DecodeStatus S = MCDisassembler::Success;
3490 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3491 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3492 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3493 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3494 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3501 return MCDisassembler::Fail;
3503 if (fieldFromInstruction32(Insn, 4, 1))
3504 return MCDisassembler::Fail; // UNDEFINED
3505 index = fieldFromInstruction32(Insn, 5, 3);
3508 if (fieldFromInstruction32(Insn, 4, 1))
3509 return MCDisassembler::Fail; // UNDEFINED
3510 index = fieldFromInstruction32(Insn, 6, 2);
3511 if (fieldFromInstruction32(Insn, 5, 1))
3515 if (fieldFromInstruction32(Insn, 4, 2))
3516 return MCDisassembler::Fail; // UNDEFINED
3517 index = fieldFromInstruction32(Insn, 7, 1);
3518 if (fieldFromInstruction32(Insn, 6, 1))
3523 if (Rm != 0xF) { // Writeback
3524 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3525 return MCDisassembler::Fail;
3527 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3528 return MCDisassembler::Fail;
3529 Inst.addOperand(MCOperand::CreateImm(align));
3532 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3533 return MCDisassembler::Fail;
3535 Inst.addOperand(MCOperand::CreateReg(0));
3538 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3539 return MCDisassembler::Fail;
3540 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3541 return MCDisassembler::Fail;
3542 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3543 return MCDisassembler::Fail;
3544 Inst.addOperand(MCOperand::CreateImm(index));
3550 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3551 uint64_t Address, const void *Decoder) {
3552 DecodeStatus S = MCDisassembler::Success;
3554 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3555 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3556 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3557 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3558 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3565 return MCDisassembler::Fail;
3567 if (fieldFromInstruction32(Insn, 4, 1))
3569 index = fieldFromInstruction32(Insn, 5, 3);
3572 if (fieldFromInstruction32(Insn, 4, 1))
3574 index = fieldFromInstruction32(Insn, 6, 2);
3575 if (fieldFromInstruction32(Insn, 5, 1))
3579 if (fieldFromInstruction32(Insn, 4, 2))
3580 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3581 index = fieldFromInstruction32(Insn, 7, 1);
3582 if (fieldFromInstruction32(Insn, 6, 1))
3587 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3588 return MCDisassembler::Fail;
3589 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3590 return MCDisassembler::Fail;
3591 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3592 return MCDisassembler::Fail;
3593 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3594 return MCDisassembler::Fail;
3596 if (Rm != 0xF) { // Writeback
3597 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3598 return MCDisassembler::Fail;
3600 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3601 return MCDisassembler::Fail;
3602 Inst.addOperand(MCOperand::CreateImm(align));
3605 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3606 return MCDisassembler::Fail;
3608 Inst.addOperand(MCOperand::CreateReg(0));
3611 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3612 return MCDisassembler::Fail;
3613 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3614 return MCDisassembler::Fail;
3615 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3616 return MCDisassembler::Fail;
3617 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3618 return MCDisassembler::Fail;
3619 Inst.addOperand(MCOperand::CreateImm(index));
3624 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3625 uint64_t Address, const void *Decoder) {
3626 DecodeStatus S = MCDisassembler::Success;
3628 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3629 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3630 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3631 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3632 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3639 return MCDisassembler::Fail;
3641 if (fieldFromInstruction32(Insn, 4, 1))
3643 index = fieldFromInstruction32(Insn, 5, 3);
3646 if (fieldFromInstruction32(Insn, 4, 1))
3648 index = fieldFromInstruction32(Insn, 6, 2);
3649 if (fieldFromInstruction32(Insn, 5, 1))
3653 if (fieldFromInstruction32(Insn, 4, 2))
3654 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3655 index = fieldFromInstruction32(Insn, 7, 1);
3656 if (fieldFromInstruction32(Insn, 6, 1))
3661 if (Rm != 0xF) { // Writeback
3662 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3663 return MCDisassembler::Fail;
3665 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3666 return MCDisassembler::Fail;
3667 Inst.addOperand(MCOperand::CreateImm(align));
3670 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3671 return MCDisassembler::Fail;
3673 Inst.addOperand(MCOperand::CreateReg(0));
3676 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3677 return MCDisassembler::Fail;
3678 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3679 return MCDisassembler::Fail;
3680 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3681 return MCDisassembler::Fail;
3682 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3683 return MCDisassembler::Fail;
3684 Inst.addOperand(MCOperand::CreateImm(index));
3689 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
3690 uint64_t Address, const void *Decoder) {
3691 DecodeStatus S = MCDisassembler::Success;
3692 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3693 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3694 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3695 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3696 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3698 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3699 S = MCDisassembler::SoftFail;
3701 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3702 return MCDisassembler::Fail;
3703 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3704 return MCDisassembler::Fail;
3705 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3706 return MCDisassembler::Fail;
3707 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3708 return MCDisassembler::Fail;
3709 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3710 return MCDisassembler::Fail;
3715 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3716 uint64_t Address, const void *Decoder) {
3717 DecodeStatus S = MCDisassembler::Success;
3718 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3719 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3720 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3721 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3722 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3724 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3725 S = MCDisassembler::SoftFail;
3727 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3728 return MCDisassembler::Fail;
3729 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3730 return MCDisassembler::Fail;
3731 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3732 return MCDisassembler::Fail;
3733 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3734 return MCDisassembler::Fail;
3735 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3736 return MCDisassembler::Fail;
3741 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3742 uint64_t Address, const void *Decoder) {
3743 DecodeStatus S = MCDisassembler::Success;
3744 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3745 // The InstPrinter needs to have the low bit of the predicate in
3746 // the mask operand to be able to print it properly.
3747 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3751 S = MCDisassembler::SoftFail;
3754 if ((mask & 0xF) == 0) {
3755 // Preserve the high bit of the mask, which is the low bit of
3759 S = MCDisassembler::SoftFail;
3762 Inst.addOperand(MCOperand::CreateImm(pred));
3763 Inst.addOperand(MCOperand::CreateImm(mask));
3768 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3769 uint64_t Address, const void *Decoder) {
3770 DecodeStatus S = MCDisassembler::Success;
3772 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3773 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3774 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3775 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3776 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3777 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3778 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3779 bool writeback = (W == 1) | (P == 0);
3781 addr |= (U << 8) | (Rn << 9);
3783 if (writeback && (Rn == Rt || Rn == Rt2))
3784 Check(S, MCDisassembler::SoftFail);
3786 Check(S, MCDisassembler::SoftFail);
3789 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3790 return MCDisassembler::Fail;
3792 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3793 return MCDisassembler::Fail;
3794 // Writeback operand
3795 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3796 return MCDisassembler::Fail;
3798 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3799 return MCDisassembler::Fail;
3805 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3806 uint64_t Address, const void *Decoder) {
3807 DecodeStatus S = MCDisassembler::Success;
3809 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3810 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3811 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3812 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3813 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3814 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3815 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3816 bool writeback = (W == 1) | (P == 0);
3818 addr |= (U << 8) | (Rn << 9);
3820 if (writeback && (Rn == Rt || Rn == Rt2))
3821 Check(S, MCDisassembler::SoftFail);
3823 // Writeback operand
3824 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3825 return MCDisassembler::Fail;
3827 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3828 return MCDisassembler::Fail;
3830 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3831 return MCDisassembler::Fail;
3833 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3834 return MCDisassembler::Fail;
3839 static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn,
3840 uint64_t Address, const void *Decoder) {
3841 unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
3842 unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
3843 if (sign1 != sign2) return MCDisassembler::Fail;
3845 unsigned Val = fieldFromInstruction32(Insn, 0, 8);
3846 Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
3847 Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
3849 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
3851 return MCDisassembler::Success;