1 //===- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA ---------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 #include "MCTargetDesc/ARMAddressingModes.h"
10 #include "MCTargetDesc/ARMBaseInfo.h"
11 #include "MCTargetDesc/ARMMCTargetDesc.h"
12 #include "TargetInfo/ARMTargetInfo.h"
13 #include "Utils/ARMBaseInfo.h"
14 #include "llvm/MC/MCContext.h"
15 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
16 #include "llvm/MC/MCFixedLenDisassembler.h"
17 #include "llvm/MC/MCInst.h"
18 #include "llvm/MC/MCInstrDesc.h"
19 #include "llvm/MC/MCSubtargetInfo.h"
20 #include "llvm/MC/SubtargetFeature.h"
21 #include "llvm/Support/Compiler.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/MathExtras.h"
24 #include "llvm/Support/TargetRegistry.h"
25 #include "llvm/Support/raw_ostream.h"
33 #define DEBUG_TYPE "arm-disassembler"
35 using DecodeStatus = MCDisassembler::DecodeStatus;
39 // Handles the condition code status of instructions in IT blocks
43 // Returns the condition code for instruction in IT block
45 unsigned CC = ARMCC::AL;
51 // Advances the IT block state to the next T or E
52 void advanceITState() {
56 // Returns true if the current instruction is in an IT block
57 bool instrInITBlock() {
58 return !ITStates.empty();
61 // Returns true if current instruction is the last instruction in an IT block
62 bool instrLastInITBlock() {
63 return ITStates.size() == 1;
66 // Called when decoding an IT instruction. Sets the IT state for the following
67 // instructions that for the IT block. Firstcond and Mask correspond to the
68 // fields in the IT instruction encoding.
69 void setITState(char Firstcond, char Mask) {
70 // (3 - the number of trailing zeros) is the number of then / else.
71 unsigned CondBit0 = Firstcond & 1;
72 unsigned NumTZ = countTrailingZeros<uint8_t>(Mask);
73 unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf);
74 assert(NumTZ <= 3 && "Invalid IT mask!");
75 // push condition codes onto the stack the correct order for the pops
76 for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) {
77 bool T = ((Mask >> Pos) & 1) == CondBit0;
79 ITStates.push_back(CCBits);
81 ITStates.push_back(CCBits ^ 1);
83 ITStates.push_back(CCBits);
87 std::vector<unsigned char> ITStates;
90 /// ARM disassembler for all ARM platforms.
91 class ARMDisassembler : public MCDisassembler {
93 ARMDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) :
94 MCDisassembler(STI, Ctx) {
97 ~ARMDisassembler() override = default;
99 DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
100 ArrayRef<uint8_t> Bytes, uint64_t Address,
101 raw_ostream &VStream,
102 raw_ostream &CStream) const override;
105 /// Thumb disassembler for all Thumb platforms.
106 class ThumbDisassembler : public MCDisassembler {
108 ThumbDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) :
109 MCDisassembler(STI, Ctx) {
112 ~ThumbDisassembler() override = default;
114 DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
115 ArrayRef<uint8_t> Bytes, uint64_t Address,
116 raw_ostream &VStream,
117 raw_ostream &CStream) const override;
120 mutable ITStatus ITBlock;
122 DecodeStatus AddThumbPredicate(MCInst&) const;
123 void UpdateThumbVFPPredicate(DecodeStatus &, MCInst&) const;
126 } // end anonymous namespace
128 static bool Check(DecodeStatus &Out, DecodeStatus In) {
130 case MCDisassembler::Success:
131 // Out stays the same.
133 case MCDisassembler::SoftFail:
136 case MCDisassembler::Fail:
140 llvm_unreachable("Invalid DecodeStatus!");
143 // Forward declare these because the autogenerated code will reference them.
144 // Definitions are further down.
145 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
146 uint64_t Address, const void *Decoder);
147 static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
148 unsigned RegNo, uint64_t Address,
149 const void *Decoder);
150 static DecodeStatus DecodeGPRwithAPSRRegisterClass(MCInst &Inst,
151 unsigned RegNo, uint64_t Address,
152 const void *Decoder);
153 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
154 uint64_t Address, const void *Decoder);
155 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
156 uint64_t Address, const void *Decoder);
157 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
158 uint64_t Address, const void *Decoder);
159 static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
160 uint64_t Address, const void *Decoder);
161 static DecodeStatus DecodeHPRRegisterClass(MCInst &Inst, unsigned RegNo,
162 uint64_t Address, const void *Decoder);
163 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
164 uint64_t Address, const void *Decoder);
165 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
166 uint64_t Address, const void *Decoder);
167 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
168 uint64_t Address, const void *Decoder);
169 static DecodeStatus DecodeSPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
170 uint64_t Address, const void *Decoder);
171 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
174 const void *Decoder);
175 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
176 uint64_t Address, const void *Decoder);
177 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
178 uint64_t Address, const void *Decoder);
179 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
180 unsigned RegNo, uint64_t Address,
181 const void *Decoder);
183 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
184 uint64_t Address, const void *Decoder);
185 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
186 uint64_t Address, const void *Decoder);
187 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
188 uint64_t Address, const void *Decoder);
189 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
190 uint64_t Address, const void *Decoder);
191 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
192 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
201 const void *Decoder);
202 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
203 uint64_t Address, const void *Decoder);
204 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
205 uint64_t Address, const void *Decoder);
206 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
207 uint64_t Address, const void *Decoder);
208 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
209 uint64_t Address, const void *Decoder);
211 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
214 const void *Decoder);
215 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
216 uint64_t Address, const void *Decoder);
217 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
218 uint64_t Address, const void *Decoder);
219 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
220 uint64_t Address, const void *Decoder);
221 static DecodeStatus DecodeHINTInstruction(MCInst &Inst, unsigned Insn,
222 uint64_t Address, const void *Decoder);
223 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
224 uint64_t Address, const void *Decoder);
225 static DecodeStatus DecodeTSTInstruction(MCInst &Inst, unsigned Insn,
226 uint64_t Address, const void *Decoder);
227 static DecodeStatus DecodeSETPANInstruction(MCInst &Inst, unsigned Insn,
228 uint64_t Address, const void *Decoder);
229 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
230 uint64_t Address, const void *Decoder);
231 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
232 uint64_t Address, const void *Decoder);
233 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
234 uint64_t Address, const void *Decoder);
235 static DecodeStatus DecodeAddrMode5FP16Operand(MCInst &Inst, unsigned Val,
236 uint64_t Address, const void *Decoder);
237 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
238 uint64_t Address, const void *Decoder);
239 static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
240 uint64_t Address, const void *Decoder);
241 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
242 uint64_t Address, const void *Decoder);
243 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
244 uint64_t Address, const void *Decoder);
245 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Val,
246 uint64_t Address, const void *Decoder);
247 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Val,
248 uint64_t Address, const void *Decoder);
249 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Val,
250 uint64_t Address, const void *Decoder);
251 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Val,
252 uint64_t Address, const void *Decoder);
253 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
254 uint64_t Address, const void *Decoder);
255 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
256 uint64_t Address, const void *Decoder);
257 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
258 uint64_t Address, const void *Decoder);
259 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
260 uint64_t Address, const void *Decoder);
261 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
262 uint64_t Address, const void *Decoder);
263 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
264 uint64_t Address, const void *Decoder);
265 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
266 uint64_t Address, const void *Decoder);
267 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
268 uint64_t Address, const void *Decoder);
269 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
270 uint64_t Address, const void *Decoder);
271 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
272 uint64_t Address, const void *Decoder);
273 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
274 uint64_t Address, const void *Decoder);
275 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
276 uint64_t Address, const void *Decoder);
277 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
278 uint64_t Address, const void *Decoder);
279 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
280 uint64_t Address, const void *Decoder);
281 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
282 uint64_t Address, const void *Decoder);
283 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
284 uint64_t Address, const void *Decoder);
285 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Insn,
286 uint64_t Address, const void *Decoder);
287 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
288 uint64_t Address, const void *Decoder);
289 static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Insn,
290 uint64_t Address, const void *Decoder);
291 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
292 uint64_t Address, const void *Decoder);
293 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
294 uint64_t Address, const void *Decoder);
295 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
296 uint64_t Address, const void *Decoder);
297 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
298 uint64_t Address, const void *Decoder);
299 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
300 uint64_t Address, const void *Decoder);
301 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
302 uint64_t Address, const void *Decoder);
303 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
304 uint64_t Address, const void *Decoder);
305 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
306 uint64_t Address, const void *Decoder);
307 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
308 uint64_t Address, const void *Decoder);
309 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
310 uint64_t Address, const void *Decoder);
311 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
312 uint64_t Address, const void *Decoder);
313 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
314 uint64_t Address, const void *Decoder);
315 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
316 uint64_t Address, const void *Decoder);
317 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
318 uint64_t Address, const void *Decoder);
319 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
320 uint64_t Address, const void *Decoder);
321 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
322 uint64_t Address, const void *Decoder);
323 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
324 uint64_t Address, const void *Decoder);
325 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
326 uint64_t Address, const void *Decoder);
327 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
328 uint64_t Address, const void *Decoder);
329 static DecodeStatus DecodeNEONComplexLane64Instruction(MCInst &Inst,
332 const void *Decoder);
334 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
335 uint64_t Address, const void *Decoder);
336 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
337 uint64_t Address, const void *Decoder);
338 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
339 uint64_t Address, const void *Decoder);
340 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
341 uint64_t Address, const void *Decoder);
342 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
343 uint64_t Address, const void *Decoder);
344 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
345 uint64_t Address, const void *Decoder);
346 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
347 uint64_t Address, const void *Decoder);
348 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
349 uint64_t Address, const void *Decoder);
350 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
351 uint64_t Address, const void *Decoder);
352 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
353 uint64_t Address, const void *Decoder);
354 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
355 uint64_t Address, const void* Decoder);
356 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
357 uint64_t Address, const void* Decoder);
358 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
359 uint64_t Address, const void* Decoder);
360 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
361 uint64_t Address, const void* Decoder);
362 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
363 uint64_t Address, const void *Decoder);
364 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
365 uint64_t Address, const void *Decoder);
366 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
367 uint64_t Address, const void *Decoder);
368 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
369 uint64_t Address, const void *Decoder);
370 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
371 uint64_t Address, const void *Decoder);
372 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
373 uint64_t Address, const void *Decoder);
374 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
375 uint64_t Address, const void *Decoder);
376 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
377 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
379 uint64_t Address, const void *Decoder);
380 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
381 uint64_t Address, const void *Decoder);
382 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
383 uint64_t Address, const void *Decoder);
384 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
385 uint64_t Address, const void *Decoder);
386 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
387 uint64_t Address, const void *Decoder);
388 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
389 uint64_t Address, const void *Decoder);
390 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
391 uint64_t Address, const void *Decoder);
392 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
393 uint64_t Address, const void *Decoder);
394 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
395 uint64_t Address, const void *Decoder);
396 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
397 uint64_t Address, const void *Decoder);
398 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
399 uint64_t Address, const void *Decoder);
400 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
401 uint64_t Address, const void *Decoder);
402 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
403 uint64_t Address, const void *Decoder);
404 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
405 uint64_t Address, const void *Decoder);
407 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
408 uint64_t Address, const void *Decoder);
409 static DecodeStatus DecoderForMRRC2AndMCRR2(MCInst &Inst, unsigned Val,
410 uint64_t Address, const void *Decoder);
411 static DecodeStatus DecodeForVMRSandVMSR(MCInst &Inst, unsigned Val,
412 uint64_t Address, const void *Decoder);
414 #include "ARMGenDisassemblerTables.inc"
416 static MCDisassembler *createARMDisassembler(const Target &T,
417 const MCSubtargetInfo &STI,
419 return new ARMDisassembler(STI, Ctx);
422 static MCDisassembler *createThumbDisassembler(const Target &T,
423 const MCSubtargetInfo &STI,
425 return new ThumbDisassembler(STI, Ctx);
428 // Post-decoding checks
429 static DecodeStatus checkDecodedInstruction(MCInst &MI, uint64_t &Size,
430 uint64_t Address, raw_ostream &OS,
433 DecodeStatus Result) {
434 switch (MI.getOpcode()) {
436 // HVC is undefined if condition = 0xf otherwise upredictable
437 // if condition != 0xe
438 uint32_t Cond = (Insn >> 28) & 0xF;
440 return MCDisassembler::Fail;
442 return MCDisassembler::SoftFail;
453 if (MI.getOperand(0).getReg() == ARM::SP &&
454 MI.getOperand(1).getReg() != ARM::SP)
455 return MCDisassembler::SoftFail;
457 default: return Result;
461 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
462 ArrayRef<uint8_t> Bytes,
463 uint64_t Address, raw_ostream &OS,
464 raw_ostream &CS) const {
467 assert(!STI.getFeatureBits()[ARM::ModeThumb] &&
468 "Asked to disassemble an ARM instruction but Subtarget is in Thumb "
471 // We want to read exactly 4 bytes of data.
472 if (Bytes.size() < 4) {
474 return MCDisassembler::Fail;
477 // Encoded as a small-endian 32-bit word in the stream.
479 (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
481 // Calling the auto-generated decoder function.
482 DecodeStatus Result =
483 decodeInstruction(DecoderTableARM32, MI, Insn, Address, this, STI);
484 if (Result != MCDisassembler::Fail) {
486 return checkDecodedInstruction(MI, Size, Address, OS, CS, Insn, Result);
494 const DecodeTable Tables[] = {
495 {DecoderTableVFP32, false}, {DecoderTableVFPV832, false},
496 {DecoderTableNEONData32, true}, {DecoderTableNEONLoadStore32, true},
497 {DecoderTableNEONDup32, true}, {DecoderTablev8NEON32, false},
498 {DecoderTablev8Crypto32, false},
501 for (auto Table : Tables) {
502 Result = decodeInstruction(Table.P, MI, Insn, Address, this, STI);
503 if (Result != MCDisassembler::Fail) {
505 // Add a fake predicate operand, because we share these instruction
506 // definitions with Thumb2 where these instructions are predicable.
507 if (Table.DecodePred && !DecodePredicateOperand(MI, 0xE, Address, this))
508 return MCDisassembler::Fail;
514 decodeInstruction(DecoderTableCoProc32, MI, Insn, Address, this, STI);
515 if (Result != MCDisassembler::Fail) {
517 return checkDecodedInstruction(MI, Size, Address, OS, CS, Insn, Result);
521 return MCDisassembler::Fail;
526 extern const MCInstrDesc ARMInsts[];
528 } // end namespace llvm
530 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
531 /// immediate Value in the MCInst. The immediate Value has had any PC
532 /// adjustment made by the caller. If the instruction is a branch instruction
533 /// then isBranch is true, else false. If the getOpInfo() function was set as
534 /// part of the setupForSymbolicDisassembly() call then that function is called
535 /// to get any symbolic information at the Address for this instruction. If
536 /// that returns non-zero then the symbolic information it returns is used to
537 /// create an MCExpr and that is added as an operand to the MCInst. If
538 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
539 /// Value is done and if a symbol is found an MCExpr is created with that, else
540 /// an MCExpr with Value is created. This function returns true if it adds an
541 /// operand to the MCInst and false otherwise.
542 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
543 bool isBranch, uint64_t InstSize,
544 MCInst &MI, const void *Decoder) {
545 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
546 // FIXME: Does it make sense for value to be negative?
547 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
548 /* Offset */ 0, InstSize);
551 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
552 /// referenced by a load instruction with the base register that is the Pc.
553 /// These can often be values in a literal pool near the Address of the
554 /// instruction. The Address of the instruction and its immediate Value are
555 /// used as a possible literal pool entry. The SymbolLookUp call back will
556 /// return the name of a symbol referenced by the literal pool's entry if
557 /// the referenced address is that of a symbol. Or it will return a pointer to
558 /// a literal 'C' string if the referenced address of the literal pool's entry
559 /// is an address into a section with 'C' string literals.
560 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
561 const void *Decoder) {
562 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
563 Dis->tryAddingPcLoadReferenceComment(Value, Address);
566 // Thumb1 instructions don't have explicit S bits. Rather, they
567 // implicitly set CPSR. Since it's not represented in the encoding, the
568 // auto-generated decoder won't inject the CPSR operand. We need to fix
569 // that as a post-pass.
570 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
571 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
572 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
573 MCInst::iterator I = MI.begin();
574 for (unsigned i = 0; i < NumOps; ++i, ++I) {
575 if (I == MI.end()) break;
576 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
577 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
578 MI.insert(I, MCOperand::createReg(InITBlock ? 0 : ARM::CPSR));
583 MI.insert(I, MCOperand::createReg(InITBlock ? 0 : ARM::CPSR));
586 // Most Thumb instructions don't have explicit predicates in the
587 // encoding, but rather get their predicates from IT context. We need
588 // to fix up the predicate operands using this context information as a
590 MCDisassembler::DecodeStatus
591 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
592 MCDisassembler::DecodeStatus S = Success;
594 const FeatureBitset &FeatureBits = getSubtargetInfo().getFeatureBits();
596 // A few instructions actually have predicates encoded in them. Don't
597 // try to overwrite it if we're seeing one of those.
598 switch (MI.getOpcode()) {
609 // Some instructions (mostly conditional branches) are not
610 // allowed in IT blocks.
611 if (ITBlock.instrInITBlock())
617 if (MI.getOperand(0).getImm() == 0x10 && (FeatureBits[ARM::FeatureRAS]) != 0)
624 // Some instructions (mostly unconditional branches) can
625 // only appears at the end of, or outside of, an IT.
626 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
633 // If we're in an IT block, base the predicate on that. Otherwise,
634 // assume a predicate of AL.
636 CC = ITBlock.getITCC();
639 if (ITBlock.instrInITBlock())
640 ITBlock.advanceITState();
642 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
643 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
644 MCInst::iterator I = MI.begin();
645 for (unsigned i = 0; i < NumOps; ++i, ++I) {
646 if (I == MI.end()) break;
647 if (OpInfo[i].isPredicate()) {
648 if (CC != ARMCC::AL && !ARMInsts[MI.getOpcode()].isPredicable())
650 I = MI.insert(I, MCOperand::createImm(CC));
653 MI.insert(I, MCOperand::createReg(0));
655 MI.insert(I, MCOperand::createReg(ARM::CPSR));
660 I = MI.insert(I, MCOperand::createImm(CC));
663 MI.insert(I, MCOperand::createReg(0));
665 MI.insert(I, MCOperand::createReg(ARM::CPSR));
670 // Thumb VFP instructions are a special case. Because we share their
671 // encodings between ARM and Thumb modes, and they are predicable in ARM
672 // mode, the auto-generated decoder will give them an (incorrect)
673 // predicate operand. We need to rewrite these operands based on the IT
674 // context as a post-pass.
675 void ThumbDisassembler::UpdateThumbVFPPredicate(
676 DecodeStatus &S, MCInst &MI) const {
678 CC = ITBlock.getITCC();
681 if (ITBlock.instrInITBlock())
682 ITBlock.advanceITState();
684 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
685 MCInst::iterator I = MI.begin();
686 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
687 for (unsigned i = 0; i < NumOps; ++i, ++I) {
688 if (OpInfo[i].isPredicate() ) {
689 if (CC != ARMCC::AL && !ARMInsts[MI.getOpcode()].isPredicable())
696 I->setReg(ARM::CPSR);
702 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
703 ArrayRef<uint8_t> Bytes,
706 raw_ostream &CS) const {
709 assert(STI.getFeatureBits()[ARM::ModeThumb] &&
710 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
712 // We want to read exactly 2 bytes of data.
713 if (Bytes.size() < 2) {
715 return MCDisassembler::Fail;
718 uint16_t Insn16 = (Bytes[1] << 8) | Bytes[0];
719 DecodeStatus Result =
720 decodeInstruction(DecoderTableThumb16, MI, Insn16, Address, this, STI);
721 if (Result != MCDisassembler::Fail) {
723 Check(Result, AddThumbPredicate(MI));
727 Result = decodeInstruction(DecoderTableThumbSBit16, MI, Insn16, Address, this,
731 bool InITBlock = ITBlock.instrInITBlock();
732 Check(Result, AddThumbPredicate(MI));
733 AddThumb1SBit(MI, InITBlock);
738 decodeInstruction(DecoderTableThumb216, MI, Insn16, Address, this, STI);
739 if (Result != MCDisassembler::Fail) {
742 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
743 // the Thumb predicate.
744 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
745 Result = MCDisassembler::SoftFail;
747 Check(Result, AddThumbPredicate(MI));
749 // If we find an IT instruction, we need to parse its condition
750 // code and mask operands so that we can apply them correctly
751 // to the subsequent instructions.
752 if (MI.getOpcode() == ARM::t2IT) {
753 unsigned Firstcond = MI.getOperand(0).getImm();
754 unsigned Mask = MI.getOperand(1).getImm();
755 ITBlock.setITState(Firstcond, Mask);
757 // An IT instruction that would give a 'NV' predicate is unpredictable.
758 if (Firstcond == ARMCC::AL && !isPowerOf2_32(Mask))
759 CS << "unpredictable IT predicate sequence";
765 // We want to read exactly 4 bytes of data.
766 if (Bytes.size() < 4) {
768 return MCDisassembler::Fail;
772 (Bytes[3] << 8) | (Bytes[2] << 0) | (Bytes[1] << 24) | (Bytes[0] << 16);
774 decodeInstruction(DecoderTableThumb32, MI, Insn32, Address, this, STI);
775 if (Result != MCDisassembler::Fail) {
777 bool InITBlock = ITBlock.instrInITBlock();
778 Check(Result, AddThumbPredicate(MI));
779 AddThumb1SBit(MI, InITBlock);
784 decodeInstruction(DecoderTableThumb232, MI, Insn32, Address, this, STI);
785 if (Result != MCDisassembler::Fail) {
787 Check(Result, AddThumbPredicate(MI));
788 return checkDecodedInstruction(MI, Size, Address, OS, CS, Insn32, Result);
791 if (fieldFromInstruction(Insn32, 28, 4) == 0xE) {
793 decodeInstruction(DecoderTableVFP32, MI, Insn32, Address, this, STI);
794 if (Result != MCDisassembler::Fail) {
796 UpdateThumbVFPPredicate(Result, MI);
802 decodeInstruction(DecoderTableVFPV832, MI, Insn32, Address, this, STI);
803 if (Result != MCDisassembler::Fail) {
808 if (fieldFromInstruction(Insn32, 28, 4) == 0xE) {
809 Result = decodeInstruction(DecoderTableNEONDup32, MI, Insn32, Address, this,
811 if (Result != MCDisassembler::Fail) {
813 Check(Result, AddThumbPredicate(MI));
818 if (fieldFromInstruction(Insn32, 24, 8) == 0xF9) {
819 uint32_t NEONLdStInsn = Insn32;
820 NEONLdStInsn &= 0xF0FFFFFF;
821 NEONLdStInsn |= 0x04000000;
822 Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
824 if (Result != MCDisassembler::Fail) {
826 Check(Result, AddThumbPredicate(MI));
831 if (fieldFromInstruction(Insn32, 24, 4) == 0xF) {
832 uint32_t NEONDataInsn = Insn32;
833 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
834 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
835 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
836 Result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
838 if (Result != MCDisassembler::Fail) {
840 Check(Result, AddThumbPredicate(MI));
844 uint32_t NEONCryptoInsn = Insn32;
845 NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24
846 NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
847 NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25
848 Result = decodeInstruction(DecoderTablev8Crypto32, MI, NEONCryptoInsn,
850 if (Result != MCDisassembler::Fail) {
855 uint32_t NEONv8Insn = Insn32;
856 NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26
857 Result = decodeInstruction(DecoderTablev8NEON32, MI, NEONv8Insn, Address,
859 if (Result != MCDisassembler::Fail) {
866 decodeInstruction(DecoderTableThumb2CoProc32, MI, Insn32, Address, this, STI);
867 if (Result != MCDisassembler::Fail) {
869 Check(Result, AddThumbPredicate(MI));
874 return MCDisassembler::Fail;
877 extern "C" void LLVMInitializeARMDisassembler() {
878 TargetRegistry::RegisterMCDisassembler(getTheARMLETarget(),
879 createARMDisassembler);
880 TargetRegistry::RegisterMCDisassembler(getTheARMBETarget(),
881 createARMDisassembler);
882 TargetRegistry::RegisterMCDisassembler(getTheThumbLETarget(),
883 createThumbDisassembler);
884 TargetRegistry::RegisterMCDisassembler(getTheThumbBETarget(),
885 createThumbDisassembler);
888 static const uint16_t GPRDecoderTable[] = {
889 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
890 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
891 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
892 ARM::R12, ARM::SP, ARM::LR, ARM::PC
895 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
896 uint64_t Address, const void *Decoder) {
898 return MCDisassembler::Fail;
900 unsigned Register = GPRDecoderTable[RegNo];
901 Inst.addOperand(MCOperand::createReg(Register));
902 return MCDisassembler::Success;
906 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
907 uint64_t Address, const void *Decoder) {
908 DecodeStatus S = MCDisassembler::Success;
911 S = MCDisassembler::SoftFail;
913 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
919 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
920 uint64_t Address, const void *Decoder) {
921 DecodeStatus S = MCDisassembler::Success;
925 Inst.addOperand(MCOperand::createReg(ARM::APSR_NZCV));
926 return MCDisassembler::Success;
929 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
933 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
934 uint64_t Address, const void *Decoder) {
936 return MCDisassembler::Fail;
937 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
940 static const uint16_t GPRPairDecoderTable[] = {
941 ARM::R0_R1, ARM::R2_R3, ARM::R4_R5, ARM::R6_R7,
942 ARM::R8_R9, ARM::R10_R11, ARM::R12_SP
945 static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
946 uint64_t Address, const void *Decoder) {
947 DecodeStatus S = MCDisassembler::Success;
950 return MCDisassembler::Fail;
952 if ((RegNo & 1) || RegNo == 0xe)
953 S = MCDisassembler::SoftFail;
955 unsigned RegisterPair = GPRPairDecoderTable[RegNo/2];
956 Inst.addOperand(MCOperand::createReg(RegisterPair));
960 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
961 uint64_t Address, const void *Decoder) {
962 unsigned Register = 0;
983 return MCDisassembler::Fail;
986 Inst.addOperand(MCOperand::createReg(Register));
987 return MCDisassembler::Success;
990 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
991 uint64_t Address, const void *Decoder) {
992 DecodeStatus S = MCDisassembler::Success;
994 const FeatureBitset &featureBits =
995 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
997 if ((RegNo == 13 && !featureBits[ARM::HasV8Ops]) || RegNo == 15)
998 S = MCDisassembler::SoftFail;
1000 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
1004 static const uint16_t SPRDecoderTable[] = {
1005 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
1006 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
1007 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
1008 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
1009 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
1010 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
1011 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
1012 ARM::S28, ARM::S29, ARM::S30, ARM::S31
1015 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
1016 uint64_t Address, const void *Decoder) {
1018 return MCDisassembler::Fail;
1020 unsigned Register = SPRDecoderTable[RegNo];
1021 Inst.addOperand(MCOperand::createReg(Register));
1022 return MCDisassembler::Success;
1025 static DecodeStatus DecodeHPRRegisterClass(MCInst &Inst, unsigned RegNo,
1026 uint64_t Address, const void *Decoder) {
1027 return DecodeSPRRegisterClass(Inst, RegNo, Address, Decoder);
1030 static const uint16_t DPRDecoderTable[] = {
1031 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
1032 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
1033 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
1034 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
1035 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
1036 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
1037 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
1038 ARM::D28, ARM::D29, ARM::D30, ARM::D31
1041 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
1042 uint64_t Address, const void *Decoder) {
1043 const FeatureBitset &featureBits =
1044 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
1046 bool hasD32 = featureBits[ARM::FeatureD32];
1048 if (RegNo > 31 || (!hasD32 && RegNo > 15))
1049 return MCDisassembler::Fail;
1051 unsigned Register = DPRDecoderTable[RegNo];
1052 Inst.addOperand(MCOperand::createReg(Register));
1053 return MCDisassembler::Success;
1056 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1057 uint64_t Address, const void *Decoder) {
1059 return MCDisassembler::Fail;
1060 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1063 static DecodeStatus DecodeSPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1064 uint64_t Address, const void *Decoder) {
1066 return MCDisassembler::Fail;
1067 return DecodeSPRRegisterClass(Inst, RegNo, Address, Decoder);
1071 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
1072 uint64_t Address, const void *Decoder) {
1074 return MCDisassembler::Fail;
1075 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1078 static const uint16_t QPRDecoderTable[] = {
1079 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1080 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1081 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1082 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1085 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1086 uint64_t Address, const void *Decoder) {
1087 if (RegNo > 31 || (RegNo & 1) != 0)
1088 return MCDisassembler::Fail;
1091 unsigned Register = QPRDecoderTable[RegNo];
1092 Inst.addOperand(MCOperand::createReg(Register));
1093 return MCDisassembler::Success;
1096 static const uint16_t DPairDecoderTable[] = {
1097 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1098 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1099 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1100 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1101 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1105 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1106 uint64_t Address, const void *Decoder) {
1108 return MCDisassembler::Fail;
1110 unsigned Register = DPairDecoderTable[RegNo];
1111 Inst.addOperand(MCOperand::createReg(Register));
1112 return MCDisassembler::Success;
1115 static const uint16_t DPairSpacedDecoderTable[] = {
1116 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1117 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1118 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1119 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1120 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1121 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1122 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1123 ARM::D28_D30, ARM::D29_D31
1126 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1129 const void *Decoder) {
1131 return MCDisassembler::Fail;
1133 unsigned Register = DPairSpacedDecoderTable[RegNo];
1134 Inst.addOperand(MCOperand::createReg(Register));
1135 return MCDisassembler::Success;
1138 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1139 uint64_t Address, const void *Decoder) {
1140 DecodeStatus S = MCDisassembler::Success;
1141 if (Val == 0xF) return MCDisassembler::Fail;
1142 // AL predicate is not allowed on Thumb1 branches.
1143 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1144 return MCDisassembler::Fail;
1145 if (Val != ARMCC::AL && !ARMInsts[Inst.getOpcode()].isPredicable())
1146 Check(S, MCDisassembler::SoftFail);
1147 Inst.addOperand(MCOperand::createImm(Val));
1148 if (Val == ARMCC::AL) {
1149 Inst.addOperand(MCOperand::createReg(0));
1151 Inst.addOperand(MCOperand::createReg(ARM::CPSR));
1155 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1156 uint64_t Address, const void *Decoder) {
1158 Inst.addOperand(MCOperand::createReg(ARM::CPSR));
1160 Inst.addOperand(MCOperand::createReg(0));
1161 return MCDisassembler::Success;
1164 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1165 uint64_t Address, const void *Decoder) {
1166 DecodeStatus S = MCDisassembler::Success;
1168 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1169 unsigned type = fieldFromInstruction(Val, 5, 2);
1170 unsigned imm = fieldFromInstruction(Val, 7, 5);
1172 // Register-immediate
1173 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
1174 return MCDisassembler::Fail;
1176 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1179 Shift = ARM_AM::lsl;
1182 Shift = ARM_AM::lsr;
1185 Shift = ARM_AM::asr;
1188 Shift = ARM_AM::ror;
1192 if (Shift == ARM_AM::ror && imm == 0)
1193 Shift = ARM_AM::rrx;
1195 unsigned Op = Shift | (imm << 3);
1196 Inst.addOperand(MCOperand::createImm(Op));
1201 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1202 uint64_t Address, const void *Decoder) {
1203 DecodeStatus S = MCDisassembler::Success;
1205 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1206 unsigned type = fieldFromInstruction(Val, 5, 2);
1207 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1209 // Register-register
1210 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1211 return MCDisassembler::Fail;
1212 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1213 return MCDisassembler::Fail;
1215 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1218 Shift = ARM_AM::lsl;
1221 Shift = ARM_AM::lsr;
1224 Shift = ARM_AM::asr;
1227 Shift = ARM_AM::ror;
1231 Inst.addOperand(MCOperand::createImm(Shift));
1236 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1237 uint64_t Address, const void *Decoder) {
1238 DecodeStatus S = MCDisassembler::Success;
1240 bool NeedDisjointWriteback = false;
1241 unsigned WritebackReg = 0;
1242 switch (Inst.getOpcode()) {
1245 case ARM::LDMIA_UPD:
1246 case ARM::LDMDB_UPD:
1247 case ARM::LDMIB_UPD:
1248 case ARM::LDMDA_UPD:
1249 case ARM::t2LDMIA_UPD:
1250 case ARM::t2LDMDB_UPD:
1251 case ARM::t2STMIA_UPD:
1252 case ARM::t2STMDB_UPD:
1253 NeedDisjointWriteback = true;
1254 WritebackReg = Inst.getOperand(0).getReg();
1258 // Empty register lists are not allowed.
1259 if (Val == 0) return MCDisassembler::Fail;
1260 for (unsigned i = 0; i < 16; ++i) {
1261 if (Val & (1 << i)) {
1262 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1263 return MCDisassembler::Fail;
1264 // Writeback not allowed if Rn is in the target list.
1265 if (NeedDisjointWriteback && WritebackReg == Inst.end()[-1].getReg())
1266 Check(S, MCDisassembler::SoftFail);
1273 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1274 uint64_t Address, const void *Decoder) {
1275 DecodeStatus S = MCDisassembler::Success;
1277 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1278 unsigned regs = fieldFromInstruction(Val, 0, 8);
1280 // In case of unpredictable encoding, tweak the operands.
1281 if (regs == 0 || (Vd + regs) > 32) {
1282 regs = Vd + regs > 32 ? 32 - Vd : regs;
1283 regs = std::max( 1u, regs);
1284 S = MCDisassembler::SoftFail;
1287 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1288 return MCDisassembler::Fail;
1289 for (unsigned i = 0; i < (regs - 1); ++i) {
1290 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1291 return MCDisassembler::Fail;
1297 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1298 uint64_t Address, const void *Decoder) {
1299 DecodeStatus S = MCDisassembler::Success;
1301 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1302 unsigned regs = fieldFromInstruction(Val, 1, 7);
1304 // In case of unpredictable encoding, tweak the operands.
1305 if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
1306 regs = Vd + regs > 32 ? 32 - Vd : regs;
1307 regs = std::max( 1u, regs);
1308 regs = std::min(16u, regs);
1309 S = MCDisassembler::SoftFail;
1312 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1313 return MCDisassembler::Fail;
1314 for (unsigned i = 0; i < (regs - 1); ++i) {
1315 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1316 return MCDisassembler::Fail;
1322 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1323 uint64_t Address, const void *Decoder) {
1324 // This operand encodes a mask of contiguous zeros between a specified MSB
1325 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1326 // the mask of all bits LSB-and-lower, and then xor them to create
1327 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1328 // create the final mask.
1329 unsigned msb = fieldFromInstruction(Val, 5, 5);
1330 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1332 DecodeStatus S = MCDisassembler::Success;
1334 Check(S, MCDisassembler::SoftFail);
1335 // The check above will cause the warning for the "potentially undefined
1336 // instruction encoding" but we can't build a bad MCOperand value here
1337 // with a lsb > msb or else printing the MCInst will cause a crash.
1341 uint32_t msb_mask = 0xFFFFFFFF;
1342 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1343 uint32_t lsb_mask = (1U << lsb) - 1;
1345 Inst.addOperand(MCOperand::createImm(~(msb_mask ^ lsb_mask)));
1349 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1350 uint64_t Address, const void *Decoder) {
1351 DecodeStatus S = MCDisassembler::Success;
1353 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1354 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1355 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1356 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1357 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1358 unsigned U = fieldFromInstruction(Insn, 23, 1);
1360 switch (Inst.getOpcode()) {
1361 case ARM::LDC_OFFSET:
1364 case ARM::LDC_OPTION:
1365 case ARM::LDCL_OFFSET:
1367 case ARM::LDCL_POST:
1368 case ARM::LDCL_OPTION:
1369 case ARM::STC_OFFSET:
1372 case ARM::STC_OPTION:
1373 case ARM::STCL_OFFSET:
1375 case ARM::STCL_POST:
1376 case ARM::STCL_OPTION:
1377 case ARM::t2LDC_OFFSET:
1378 case ARM::t2LDC_PRE:
1379 case ARM::t2LDC_POST:
1380 case ARM::t2LDC_OPTION:
1381 case ARM::t2LDCL_OFFSET:
1382 case ARM::t2LDCL_PRE:
1383 case ARM::t2LDCL_POST:
1384 case ARM::t2LDCL_OPTION:
1385 case ARM::t2STC_OFFSET:
1386 case ARM::t2STC_PRE:
1387 case ARM::t2STC_POST:
1388 case ARM::t2STC_OPTION:
1389 case ARM::t2STCL_OFFSET:
1390 case ARM::t2STCL_PRE:
1391 case ARM::t2STCL_POST:
1392 case ARM::t2STCL_OPTION:
1393 if (coproc == 0xA || coproc == 0xB)
1394 return MCDisassembler::Fail;
1400 const FeatureBitset &featureBits =
1401 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
1402 if (featureBits[ARM::HasV8Ops] && (coproc != 14))
1403 return MCDisassembler::Fail;
1405 Inst.addOperand(MCOperand::createImm(coproc));
1406 Inst.addOperand(MCOperand::createImm(CRd));
1407 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1408 return MCDisassembler::Fail;
1410 switch (Inst.getOpcode()) {
1411 case ARM::t2LDC2_OFFSET:
1412 case ARM::t2LDC2L_OFFSET:
1413 case ARM::t2LDC2_PRE:
1414 case ARM::t2LDC2L_PRE:
1415 case ARM::t2STC2_OFFSET:
1416 case ARM::t2STC2L_OFFSET:
1417 case ARM::t2STC2_PRE:
1418 case ARM::t2STC2L_PRE:
1419 case ARM::LDC2_OFFSET:
1420 case ARM::LDC2L_OFFSET:
1422 case ARM::LDC2L_PRE:
1423 case ARM::STC2_OFFSET:
1424 case ARM::STC2L_OFFSET:
1426 case ARM::STC2L_PRE:
1427 case ARM::t2LDC_OFFSET:
1428 case ARM::t2LDCL_OFFSET:
1429 case ARM::t2LDC_PRE:
1430 case ARM::t2LDCL_PRE:
1431 case ARM::t2STC_OFFSET:
1432 case ARM::t2STCL_OFFSET:
1433 case ARM::t2STC_PRE:
1434 case ARM::t2STCL_PRE:
1435 case ARM::LDC_OFFSET:
1436 case ARM::LDCL_OFFSET:
1439 case ARM::STC_OFFSET:
1440 case ARM::STCL_OFFSET:
1443 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1444 Inst.addOperand(MCOperand::createImm(imm));
1446 case ARM::t2LDC2_POST:
1447 case ARM::t2LDC2L_POST:
1448 case ARM::t2STC2_POST:
1449 case ARM::t2STC2L_POST:
1450 case ARM::LDC2_POST:
1451 case ARM::LDC2L_POST:
1452 case ARM::STC2_POST:
1453 case ARM::STC2L_POST:
1454 case ARM::t2LDC_POST:
1455 case ARM::t2LDCL_POST:
1456 case ARM::t2STC_POST:
1457 case ARM::t2STCL_POST:
1459 case ARM::LDCL_POST:
1461 case ARM::STCL_POST:
1465 // The 'option' variant doesn't encode 'U' in the immediate since
1466 // the immediate is unsigned [0,255].
1467 Inst.addOperand(MCOperand::createImm(imm));
1471 switch (Inst.getOpcode()) {
1472 case ARM::LDC_OFFSET:
1475 case ARM::LDC_OPTION:
1476 case ARM::LDCL_OFFSET:
1478 case ARM::LDCL_POST:
1479 case ARM::LDCL_OPTION:
1480 case ARM::STC_OFFSET:
1483 case ARM::STC_OPTION:
1484 case ARM::STCL_OFFSET:
1486 case ARM::STCL_POST:
1487 case ARM::STCL_OPTION:
1488 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1489 return MCDisassembler::Fail;
1499 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1500 uint64_t Address, const void *Decoder) {
1501 DecodeStatus S = MCDisassembler::Success;
1503 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1504 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1505 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1506 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1507 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1508 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1509 unsigned P = fieldFromInstruction(Insn, 24, 1);
1510 unsigned W = fieldFromInstruction(Insn, 21, 1);
1512 // On stores, the writeback operand precedes Rt.
1513 switch (Inst.getOpcode()) {
1514 case ARM::STR_POST_IMM:
1515 case ARM::STR_POST_REG:
1516 case ARM::STRB_POST_IMM:
1517 case ARM::STRB_POST_REG:
1518 case ARM::STRT_POST_REG:
1519 case ARM::STRT_POST_IMM:
1520 case ARM::STRBT_POST_REG:
1521 case ARM::STRBT_POST_IMM:
1522 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1523 return MCDisassembler::Fail;
1529 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1530 return MCDisassembler::Fail;
1532 // On loads, the writeback operand comes after Rt.
1533 switch (Inst.getOpcode()) {
1534 case ARM::LDR_POST_IMM:
1535 case ARM::LDR_POST_REG:
1536 case ARM::LDRB_POST_IMM:
1537 case ARM::LDRB_POST_REG:
1538 case ARM::LDRBT_POST_REG:
1539 case ARM::LDRBT_POST_IMM:
1540 case ARM::LDRT_POST_REG:
1541 case ARM::LDRT_POST_IMM:
1542 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1543 return MCDisassembler::Fail;
1549 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1550 return MCDisassembler::Fail;
1552 ARM_AM::AddrOpc Op = ARM_AM::add;
1553 if (!fieldFromInstruction(Insn, 23, 1))
1556 bool writeback = (P == 0) || (W == 1);
1557 unsigned idx_mode = 0;
1559 idx_mode = ARMII::IndexModePre;
1560 else if (!P && writeback)
1561 idx_mode = ARMII::IndexModePost;
1563 if (writeback && (Rn == 15 || Rn == Rt))
1564 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1567 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1568 return MCDisassembler::Fail;
1569 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1570 switch( fieldFromInstruction(Insn, 5, 2)) {
1584 return MCDisassembler::Fail;
1586 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1587 if (Opc == ARM_AM::ror && amt == 0)
1589 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1591 Inst.addOperand(MCOperand::createImm(imm));
1593 Inst.addOperand(MCOperand::createReg(0));
1594 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1595 Inst.addOperand(MCOperand::createImm(tmp));
1598 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1599 return MCDisassembler::Fail;
1604 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1605 uint64_t Address, const void *Decoder) {
1606 DecodeStatus S = MCDisassembler::Success;
1608 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1609 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1610 unsigned type = fieldFromInstruction(Val, 5, 2);
1611 unsigned imm = fieldFromInstruction(Val, 7, 5);
1612 unsigned U = fieldFromInstruction(Val, 12, 1);
1614 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1630 if (ShOp == ARM_AM::ror && imm == 0)
1633 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1634 return MCDisassembler::Fail;
1635 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1636 return MCDisassembler::Fail;
1639 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1641 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1642 Inst.addOperand(MCOperand::createImm(shift));
1648 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1649 uint64_t Address, const void *Decoder) {
1650 DecodeStatus S = MCDisassembler::Success;
1652 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1653 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1654 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1655 unsigned type = fieldFromInstruction(Insn, 22, 1);
1656 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1657 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1658 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1659 unsigned W = fieldFromInstruction(Insn, 21, 1);
1660 unsigned P = fieldFromInstruction(Insn, 24, 1);
1661 unsigned Rt2 = Rt + 1;
1663 bool writeback = (W == 1) | (P == 0);
1665 // For {LD,ST}RD, Rt must be even, else undefined.
1666 switch (Inst.getOpcode()) {
1669 case ARM::STRD_POST:
1672 case ARM::LDRD_POST:
1673 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1678 switch (Inst.getOpcode()) {
1681 case ARM::STRD_POST:
1682 if (P == 0 && W == 1)
1683 S = MCDisassembler::SoftFail;
1685 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1686 S = MCDisassembler::SoftFail;
1687 if (type && Rm == 15)
1688 S = MCDisassembler::SoftFail;
1690 S = MCDisassembler::SoftFail;
1691 if (!type && fieldFromInstruction(Insn, 8, 4))
1692 S = MCDisassembler::SoftFail;
1696 case ARM::STRH_POST:
1698 S = MCDisassembler::SoftFail;
1699 if (writeback && (Rn == 15 || Rn == Rt))
1700 S = MCDisassembler::SoftFail;
1701 if (!type && Rm == 15)
1702 S = MCDisassembler::SoftFail;
1706 case ARM::LDRD_POST:
1707 if (type && Rn == 15) {
1709 S = MCDisassembler::SoftFail;
1712 if (P == 0 && W == 1)
1713 S = MCDisassembler::SoftFail;
1714 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1715 S = MCDisassembler::SoftFail;
1716 if (!type && writeback && Rn == 15)
1717 S = MCDisassembler::SoftFail;
1718 if (writeback && (Rn == Rt || Rn == Rt2))
1719 S = MCDisassembler::SoftFail;
1723 case ARM::LDRH_POST:
1724 if (type && Rn == 15) {
1726 S = MCDisassembler::SoftFail;
1730 S = MCDisassembler::SoftFail;
1731 if (!type && Rm == 15)
1732 S = MCDisassembler::SoftFail;
1733 if (!type && writeback && (Rn == 15 || Rn == Rt))
1734 S = MCDisassembler::SoftFail;
1737 case ARM::LDRSH_PRE:
1738 case ARM::LDRSH_POST:
1740 case ARM::LDRSB_PRE:
1741 case ARM::LDRSB_POST:
1742 if (type && Rn == 15) {
1744 S = MCDisassembler::SoftFail;
1747 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1748 S = MCDisassembler::SoftFail;
1749 if (!type && (Rt == 15 || Rm == 15))
1750 S = MCDisassembler::SoftFail;
1751 if (!type && writeback && (Rn == 15 || Rn == Rt))
1752 S = MCDisassembler::SoftFail;
1758 if (writeback) { // Writeback
1760 U |= ARMII::IndexModePre << 9;
1762 U |= ARMII::IndexModePost << 9;
1764 // On stores, the writeback operand precedes Rt.
1765 switch (Inst.getOpcode()) {
1768 case ARM::STRD_POST:
1771 case ARM::STRH_POST:
1772 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1773 return MCDisassembler::Fail;
1780 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1781 return MCDisassembler::Fail;
1782 switch (Inst.getOpcode()) {
1785 case ARM::STRD_POST:
1788 case ARM::LDRD_POST:
1789 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1790 return MCDisassembler::Fail;
1797 // On loads, the writeback operand comes after Rt.
1798 switch (Inst.getOpcode()) {
1801 case ARM::LDRD_POST:
1804 case ARM::LDRH_POST:
1806 case ARM::LDRSH_PRE:
1807 case ARM::LDRSH_POST:
1809 case ARM::LDRSB_PRE:
1810 case ARM::LDRSB_POST:
1813 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1814 return MCDisassembler::Fail;
1821 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1822 return MCDisassembler::Fail;
1825 Inst.addOperand(MCOperand::createReg(0));
1826 Inst.addOperand(MCOperand::createImm(U | (imm << 4) | Rm));
1828 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1829 return MCDisassembler::Fail;
1830 Inst.addOperand(MCOperand::createImm(U));
1833 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1834 return MCDisassembler::Fail;
1839 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1840 uint64_t Address, const void *Decoder) {
1841 DecodeStatus S = MCDisassembler::Success;
1843 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1844 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1861 Inst.addOperand(MCOperand::createImm(mode));
1862 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1863 return MCDisassembler::Fail;
1868 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
1869 uint64_t Address, const void *Decoder) {
1870 DecodeStatus S = MCDisassembler::Success;
1872 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1873 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1874 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1875 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1878 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1880 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1881 return MCDisassembler::Fail;
1882 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1883 return MCDisassembler::Fail;
1884 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1885 return MCDisassembler::Fail;
1886 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1887 return MCDisassembler::Fail;
1891 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1893 uint64_t Address, const void *Decoder) {
1894 DecodeStatus S = MCDisassembler::Success;
1896 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1897 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1898 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1901 // Ambiguous with RFE and SRS
1902 switch (Inst.getOpcode()) {
1904 Inst.setOpcode(ARM::RFEDA);
1906 case ARM::LDMDA_UPD:
1907 Inst.setOpcode(ARM::RFEDA_UPD);
1910 Inst.setOpcode(ARM::RFEDB);
1912 case ARM::LDMDB_UPD:
1913 Inst.setOpcode(ARM::RFEDB_UPD);
1916 Inst.setOpcode(ARM::RFEIA);
1918 case ARM::LDMIA_UPD:
1919 Inst.setOpcode(ARM::RFEIA_UPD);
1922 Inst.setOpcode(ARM::RFEIB);
1924 case ARM::LDMIB_UPD:
1925 Inst.setOpcode(ARM::RFEIB_UPD);
1928 Inst.setOpcode(ARM::SRSDA);
1930 case ARM::STMDA_UPD:
1931 Inst.setOpcode(ARM::SRSDA_UPD);
1934 Inst.setOpcode(ARM::SRSDB);
1936 case ARM::STMDB_UPD:
1937 Inst.setOpcode(ARM::SRSDB_UPD);
1940 Inst.setOpcode(ARM::SRSIA);
1942 case ARM::STMIA_UPD:
1943 Inst.setOpcode(ARM::SRSIA_UPD);
1946 Inst.setOpcode(ARM::SRSIB);
1948 case ARM::STMIB_UPD:
1949 Inst.setOpcode(ARM::SRSIB_UPD);
1952 return MCDisassembler::Fail;
1955 // For stores (which become SRS's, the only operand is the mode.
1956 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1957 // Check SRS encoding constraints
1958 if (!(fieldFromInstruction(Insn, 22, 1) == 1 &&
1959 fieldFromInstruction(Insn, 20, 1) == 0))
1960 return MCDisassembler::Fail;
1963 MCOperand::createImm(fieldFromInstruction(Insn, 0, 4)));
1967 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1970 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1971 return MCDisassembler::Fail;
1972 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1973 return MCDisassembler::Fail; // Tied
1974 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1975 return MCDisassembler::Fail;
1976 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1977 return MCDisassembler::Fail;
1982 // Check for UNPREDICTABLE predicated ESB instruction
1983 static DecodeStatus DecodeHINTInstruction(MCInst &Inst, unsigned Insn,
1984 uint64_t Address, const void *Decoder) {
1985 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1986 unsigned imm8 = fieldFromInstruction(Insn, 0, 8);
1987 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
1988 const FeatureBitset &FeatureBits = Dis->getSubtargetInfo().getFeatureBits();
1990 DecodeStatus S = MCDisassembler::Success;
1992 Inst.addOperand(MCOperand::createImm(imm8));
1994 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1995 return MCDisassembler::Fail;
1997 // ESB is unpredictable if pred != AL. Without the RAS extension, it is a NOP,
1998 // so all predicates should be allowed.
1999 if (imm8 == 0x10 && pred != 0xe && ((FeatureBits[ARM::FeatureRAS]) != 0))
2000 S = MCDisassembler::SoftFail;
2005 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
2006 uint64_t Address, const void *Decoder) {
2007 unsigned imod = fieldFromInstruction(Insn, 18, 2);
2008 unsigned M = fieldFromInstruction(Insn, 17, 1);
2009 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
2010 unsigned mode = fieldFromInstruction(Insn, 0, 5);
2012 DecodeStatus S = MCDisassembler::Success;
2014 // This decoder is called from multiple location that do not check
2015 // the full encoding is valid before they do.
2016 if (fieldFromInstruction(Insn, 5, 1) != 0 ||
2017 fieldFromInstruction(Insn, 16, 1) != 0 ||
2018 fieldFromInstruction(Insn, 20, 8) != 0x10)
2019 return MCDisassembler::Fail;
2021 // imod == '01' --> UNPREDICTABLE
2022 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
2023 // return failure here. The '01' imod value is unprintable, so there's
2024 // nothing useful we could do even if we returned UNPREDICTABLE.
2026 if (imod == 1) return MCDisassembler::Fail;
2029 Inst.setOpcode(ARM::CPS3p);
2030 Inst.addOperand(MCOperand::createImm(imod));
2031 Inst.addOperand(MCOperand::createImm(iflags));
2032 Inst.addOperand(MCOperand::createImm(mode));
2033 } else if (imod && !M) {
2034 Inst.setOpcode(ARM::CPS2p);
2035 Inst.addOperand(MCOperand::createImm(imod));
2036 Inst.addOperand(MCOperand::createImm(iflags));
2037 if (mode) S = MCDisassembler::SoftFail;
2038 } else if (!imod && M) {
2039 Inst.setOpcode(ARM::CPS1p);
2040 Inst.addOperand(MCOperand::createImm(mode));
2041 if (iflags) S = MCDisassembler::SoftFail;
2043 // imod == '00' && M == '0' --> UNPREDICTABLE
2044 Inst.setOpcode(ARM::CPS1p);
2045 Inst.addOperand(MCOperand::createImm(mode));
2046 S = MCDisassembler::SoftFail;
2052 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
2053 uint64_t Address, const void *Decoder) {
2054 unsigned imod = fieldFromInstruction(Insn, 9, 2);
2055 unsigned M = fieldFromInstruction(Insn, 8, 1);
2056 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
2057 unsigned mode = fieldFromInstruction(Insn, 0, 5);
2059 DecodeStatus S = MCDisassembler::Success;
2061 // imod == '01' --> UNPREDICTABLE
2062 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
2063 // return failure here. The '01' imod value is unprintable, so there's
2064 // nothing useful we could do even if we returned UNPREDICTABLE.
2066 if (imod == 1) return MCDisassembler::Fail;
2069 Inst.setOpcode(ARM::t2CPS3p);
2070 Inst.addOperand(MCOperand::createImm(imod));
2071 Inst.addOperand(MCOperand::createImm(iflags));
2072 Inst.addOperand(MCOperand::createImm(mode));
2073 } else if (imod && !M) {
2074 Inst.setOpcode(ARM::t2CPS2p);
2075 Inst.addOperand(MCOperand::createImm(imod));
2076 Inst.addOperand(MCOperand::createImm(iflags));
2077 if (mode) S = MCDisassembler::SoftFail;
2078 } else if (!imod && M) {
2079 Inst.setOpcode(ARM::t2CPS1p);
2080 Inst.addOperand(MCOperand::createImm(mode));
2081 if (iflags) S = MCDisassembler::SoftFail;
2083 // imod == '00' && M == '0' --> this is a HINT instruction
2084 int imm = fieldFromInstruction(Insn, 0, 8);
2085 // HINT are defined only for immediate in [0..4]
2086 if(imm > 4) return MCDisassembler::Fail;
2087 Inst.setOpcode(ARM::t2HINT);
2088 Inst.addOperand(MCOperand::createImm(imm));
2094 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
2095 uint64_t Address, const void *Decoder) {
2096 DecodeStatus S = MCDisassembler::Success;
2098 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
2101 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
2102 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
2103 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2104 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
2106 if (Inst.getOpcode() == ARM::t2MOVTi16)
2107 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2108 return MCDisassembler::Fail;
2109 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2110 return MCDisassembler::Fail;
2112 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2113 Inst.addOperand(MCOperand::createImm(imm));
2118 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
2119 uint64_t Address, const void *Decoder) {
2120 DecodeStatus S = MCDisassembler::Success;
2122 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2123 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2126 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2127 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2129 if (Inst.getOpcode() == ARM::MOVTi16)
2130 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2131 return MCDisassembler::Fail;
2133 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2134 return MCDisassembler::Fail;
2136 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2137 Inst.addOperand(MCOperand::createImm(imm));
2139 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2140 return MCDisassembler::Fail;
2145 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2146 uint64_t Address, const void *Decoder) {
2147 DecodeStatus S = MCDisassembler::Success;
2149 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2150 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2151 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2152 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2153 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2156 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2158 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2159 return MCDisassembler::Fail;
2160 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2161 return MCDisassembler::Fail;
2162 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2163 return MCDisassembler::Fail;
2164 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2165 return MCDisassembler::Fail;
2167 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2168 return MCDisassembler::Fail;
2173 static DecodeStatus DecodeTSTInstruction(MCInst &Inst, unsigned Insn,
2174 uint64_t Address, const void *Decoder) {
2175 DecodeStatus S = MCDisassembler::Success;
2177 unsigned Pred = fieldFromInstruction(Insn, 28, 4);
2178 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2179 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2182 return DecodeSETPANInstruction(Inst, Insn, Address, Decoder);
2184 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2185 return MCDisassembler::Fail;
2186 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2187 return MCDisassembler::Fail;
2188 if (!Check(S, DecodePredicateOperand(Inst, Pred, Address, Decoder)))
2189 return MCDisassembler::Fail;
2194 static DecodeStatus DecodeSETPANInstruction(MCInst &Inst, unsigned Insn,
2195 uint64_t Address, const void *Decoder) {
2196 DecodeStatus S = MCDisassembler::Success;
2198 unsigned Imm = fieldFromInstruction(Insn, 9, 1);
2200 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
2201 const FeatureBitset &FeatureBits = Dis->getSubtargetInfo().getFeatureBits();
2203 if (!FeatureBits[ARM::HasV8_1aOps] ||
2204 !FeatureBits[ARM::HasV8Ops])
2205 return MCDisassembler::Fail;
2207 // Decoder can be called from DecodeTST, which does not check the full
2208 // encoding is valid.
2209 if (fieldFromInstruction(Insn, 20,12) != 0xf11 ||
2210 fieldFromInstruction(Insn, 4,4) != 0)
2211 return MCDisassembler::Fail;
2212 if (fieldFromInstruction(Insn, 10,10) != 0 ||
2213 fieldFromInstruction(Insn, 0,4) != 0)
2214 S = MCDisassembler::SoftFail;
2216 Inst.setOpcode(ARM::SETPAN);
2217 Inst.addOperand(MCOperand::createImm(Imm));
2222 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2223 uint64_t Address, const void *Decoder) {
2224 DecodeStatus S = MCDisassembler::Success;
2226 unsigned add = fieldFromInstruction(Val, 12, 1);
2227 unsigned imm = fieldFromInstruction(Val, 0, 12);
2228 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2230 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2231 return MCDisassembler::Fail;
2233 if (!add) imm *= -1;
2234 if (imm == 0 && !add) imm = INT32_MIN;
2235 Inst.addOperand(MCOperand::createImm(imm));
2237 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2242 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2243 uint64_t Address, const void *Decoder) {
2244 DecodeStatus S = MCDisassembler::Success;
2246 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2247 // U == 1 to add imm, 0 to subtract it.
2248 unsigned U = fieldFromInstruction(Val, 8, 1);
2249 unsigned imm = fieldFromInstruction(Val, 0, 8);
2251 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2252 return MCDisassembler::Fail;
2255 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2257 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2262 static DecodeStatus DecodeAddrMode5FP16Operand(MCInst &Inst, unsigned Val,
2263 uint64_t Address, const void *Decoder) {
2264 DecodeStatus S = MCDisassembler::Success;
2266 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2267 // U == 1 to add imm, 0 to subtract it.
2268 unsigned U = fieldFromInstruction(Val, 8, 1);
2269 unsigned imm = fieldFromInstruction(Val, 0, 8);
2271 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2272 return MCDisassembler::Fail;
2275 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5FP16Opc(ARM_AM::add, imm)));
2277 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5FP16Opc(ARM_AM::sub, imm)));
2282 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2283 uint64_t Address, const void *Decoder) {
2284 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2288 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2289 uint64_t Address, const void *Decoder) {
2290 DecodeStatus Status = MCDisassembler::Success;
2292 // Note the J1 and J2 values are from the encoded instruction. So here
2293 // change them to I1 and I2 values via as documented:
2294 // I1 = NOT(J1 EOR S);
2295 // I2 = NOT(J2 EOR S);
2296 // and build the imm32 with one trailing zero as documented:
2297 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2298 unsigned S = fieldFromInstruction(Insn, 26, 1);
2299 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2300 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2301 unsigned I1 = !(J1 ^ S);
2302 unsigned I2 = !(J2 ^ S);
2303 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2304 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2305 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2306 int imm32 = SignExtend32<25>(tmp << 1);
2307 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2308 true, 4, Inst, Decoder))
2309 Inst.addOperand(MCOperand::createImm(imm32));
2315 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2316 uint64_t Address, const void *Decoder) {
2317 DecodeStatus S = MCDisassembler::Success;
2319 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2320 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2323 Inst.setOpcode(ARM::BLXi);
2324 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2325 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2326 true, 4, Inst, Decoder))
2327 Inst.addOperand(MCOperand::createImm(SignExtend32<26>(imm)));
2331 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2332 true, 4, Inst, Decoder))
2333 Inst.addOperand(MCOperand::createImm(SignExtend32<26>(imm)));
2334 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2335 return MCDisassembler::Fail;
2340 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2341 uint64_t Address, const void *Decoder) {
2342 DecodeStatus S = MCDisassembler::Success;
2344 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2345 unsigned align = fieldFromInstruction(Val, 4, 2);
2347 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2348 return MCDisassembler::Fail;
2350 Inst.addOperand(MCOperand::createImm(0));
2352 Inst.addOperand(MCOperand::createImm(4 << align));
2357 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2358 uint64_t Address, const void *Decoder) {
2359 DecodeStatus S = MCDisassembler::Success;
2361 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2362 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2363 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2364 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2365 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2366 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2368 // First output register
2369 switch (Inst.getOpcode()) {
2370 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2371 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2372 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2373 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2374 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2375 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2376 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2377 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2378 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2379 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2380 return MCDisassembler::Fail;
2385 case ARM::VLD2b16wb_fixed:
2386 case ARM::VLD2b16wb_register:
2387 case ARM::VLD2b32wb_fixed:
2388 case ARM::VLD2b32wb_register:
2389 case ARM::VLD2b8wb_fixed:
2390 case ARM::VLD2b8wb_register:
2391 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2392 return MCDisassembler::Fail;
2395 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2396 return MCDisassembler::Fail;
2399 // Second output register
2400 switch (Inst.getOpcode()) {
2404 case ARM::VLD3d8_UPD:
2405 case ARM::VLD3d16_UPD:
2406 case ARM::VLD3d32_UPD:
2410 case ARM::VLD4d8_UPD:
2411 case ARM::VLD4d16_UPD:
2412 case ARM::VLD4d32_UPD:
2413 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2414 return MCDisassembler::Fail;
2419 case ARM::VLD3q8_UPD:
2420 case ARM::VLD3q16_UPD:
2421 case ARM::VLD3q32_UPD:
2425 case ARM::VLD4q8_UPD:
2426 case ARM::VLD4q16_UPD:
2427 case ARM::VLD4q32_UPD:
2428 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2429 return MCDisassembler::Fail;
2435 // Third output register
2436 switch(Inst.getOpcode()) {
2440 case ARM::VLD3d8_UPD:
2441 case ARM::VLD3d16_UPD:
2442 case ARM::VLD3d32_UPD:
2446 case ARM::VLD4d8_UPD:
2447 case ARM::VLD4d16_UPD:
2448 case ARM::VLD4d32_UPD:
2449 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2450 return MCDisassembler::Fail;
2455 case ARM::VLD3q8_UPD:
2456 case ARM::VLD3q16_UPD:
2457 case ARM::VLD3q32_UPD:
2461 case ARM::VLD4q8_UPD:
2462 case ARM::VLD4q16_UPD:
2463 case ARM::VLD4q32_UPD:
2464 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2465 return MCDisassembler::Fail;
2471 // Fourth output register
2472 switch (Inst.getOpcode()) {
2476 case ARM::VLD4d8_UPD:
2477 case ARM::VLD4d16_UPD:
2478 case ARM::VLD4d32_UPD:
2479 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2480 return MCDisassembler::Fail;
2485 case ARM::VLD4q8_UPD:
2486 case ARM::VLD4q16_UPD:
2487 case ARM::VLD4q32_UPD:
2488 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2489 return MCDisassembler::Fail;
2495 // Writeback operand
2496 switch (Inst.getOpcode()) {
2497 case ARM::VLD1d8wb_fixed:
2498 case ARM::VLD1d16wb_fixed:
2499 case ARM::VLD1d32wb_fixed:
2500 case ARM::VLD1d64wb_fixed:
2501 case ARM::VLD1d8wb_register:
2502 case ARM::VLD1d16wb_register:
2503 case ARM::VLD1d32wb_register:
2504 case ARM::VLD1d64wb_register:
2505 case ARM::VLD1q8wb_fixed:
2506 case ARM::VLD1q16wb_fixed:
2507 case ARM::VLD1q32wb_fixed:
2508 case ARM::VLD1q64wb_fixed:
2509 case ARM::VLD1q8wb_register:
2510 case ARM::VLD1q16wb_register:
2511 case ARM::VLD1q32wb_register:
2512 case ARM::VLD1q64wb_register:
2513 case ARM::VLD1d8Twb_fixed:
2514 case ARM::VLD1d8Twb_register:
2515 case ARM::VLD1d16Twb_fixed:
2516 case ARM::VLD1d16Twb_register:
2517 case ARM::VLD1d32Twb_fixed:
2518 case ARM::VLD1d32Twb_register:
2519 case ARM::VLD1d64Twb_fixed:
2520 case ARM::VLD1d64Twb_register:
2521 case ARM::VLD1d8Qwb_fixed:
2522 case ARM::VLD1d8Qwb_register:
2523 case ARM::VLD1d16Qwb_fixed:
2524 case ARM::VLD1d16Qwb_register:
2525 case ARM::VLD1d32Qwb_fixed:
2526 case ARM::VLD1d32Qwb_register:
2527 case ARM::VLD1d64Qwb_fixed:
2528 case ARM::VLD1d64Qwb_register:
2529 case ARM::VLD2d8wb_fixed:
2530 case ARM::VLD2d16wb_fixed:
2531 case ARM::VLD2d32wb_fixed:
2532 case ARM::VLD2q8wb_fixed:
2533 case ARM::VLD2q16wb_fixed:
2534 case ARM::VLD2q32wb_fixed:
2535 case ARM::VLD2d8wb_register:
2536 case ARM::VLD2d16wb_register:
2537 case ARM::VLD2d32wb_register:
2538 case ARM::VLD2q8wb_register:
2539 case ARM::VLD2q16wb_register:
2540 case ARM::VLD2q32wb_register:
2541 case ARM::VLD2b8wb_fixed:
2542 case ARM::VLD2b16wb_fixed:
2543 case ARM::VLD2b32wb_fixed:
2544 case ARM::VLD2b8wb_register:
2545 case ARM::VLD2b16wb_register:
2546 case ARM::VLD2b32wb_register:
2547 Inst.addOperand(MCOperand::createImm(0));
2549 case ARM::VLD3d8_UPD:
2550 case ARM::VLD3d16_UPD:
2551 case ARM::VLD3d32_UPD:
2552 case ARM::VLD3q8_UPD:
2553 case ARM::VLD3q16_UPD:
2554 case ARM::VLD3q32_UPD:
2555 case ARM::VLD4d8_UPD:
2556 case ARM::VLD4d16_UPD:
2557 case ARM::VLD4d32_UPD:
2558 case ARM::VLD4q8_UPD:
2559 case ARM::VLD4q16_UPD:
2560 case ARM::VLD4q32_UPD:
2561 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2562 return MCDisassembler::Fail;
2568 // AddrMode6 Base (register+alignment)
2569 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2570 return MCDisassembler::Fail;
2572 // AddrMode6 Offset (register)
2573 switch (Inst.getOpcode()) {
2575 // The below have been updated to have explicit am6offset split
2576 // between fixed and register offset. For those instructions not
2577 // yet updated, we need to add an additional reg0 operand for the
2580 // The fixed offset encodes as Rm == 0xd, so we check for that.
2582 Inst.addOperand(MCOperand::createReg(0));
2585 // Fall through to handle the register offset variant.
2587 case ARM::VLD1d8wb_fixed:
2588 case ARM::VLD1d16wb_fixed:
2589 case ARM::VLD1d32wb_fixed:
2590 case ARM::VLD1d64wb_fixed:
2591 case ARM::VLD1d8Twb_fixed:
2592 case ARM::VLD1d16Twb_fixed:
2593 case ARM::VLD1d32Twb_fixed:
2594 case ARM::VLD1d64Twb_fixed:
2595 case ARM::VLD1d8Qwb_fixed:
2596 case ARM::VLD1d16Qwb_fixed:
2597 case ARM::VLD1d32Qwb_fixed:
2598 case ARM::VLD1d64Qwb_fixed:
2599 case ARM::VLD1d8wb_register:
2600 case ARM::VLD1d16wb_register:
2601 case ARM::VLD1d32wb_register:
2602 case ARM::VLD1d64wb_register:
2603 case ARM::VLD1q8wb_fixed:
2604 case ARM::VLD1q16wb_fixed:
2605 case ARM::VLD1q32wb_fixed:
2606 case ARM::VLD1q64wb_fixed:
2607 case ARM::VLD1q8wb_register:
2608 case ARM::VLD1q16wb_register:
2609 case ARM::VLD1q32wb_register:
2610 case ARM::VLD1q64wb_register:
2611 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2612 // variant encodes Rm == 0xf. Anything else is a register offset post-
2613 // increment and we need to add the register operand to the instruction.
2614 if (Rm != 0xD && Rm != 0xF &&
2615 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2616 return MCDisassembler::Fail;
2618 case ARM::VLD2d8wb_fixed:
2619 case ARM::VLD2d16wb_fixed:
2620 case ARM::VLD2d32wb_fixed:
2621 case ARM::VLD2b8wb_fixed:
2622 case ARM::VLD2b16wb_fixed:
2623 case ARM::VLD2b32wb_fixed:
2624 case ARM::VLD2q8wb_fixed:
2625 case ARM::VLD2q16wb_fixed:
2626 case ARM::VLD2q32wb_fixed:
2633 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Insn,
2634 uint64_t Address, const void *Decoder) {
2635 unsigned type = fieldFromInstruction(Insn, 8, 4);
2636 unsigned align = fieldFromInstruction(Insn, 4, 2);
2637 if (type == 6 && (align & 2)) return MCDisassembler::Fail;
2638 if (type == 7 && (align & 2)) return MCDisassembler::Fail;
2639 if (type == 10 && align == 3) return MCDisassembler::Fail;
2641 unsigned load = fieldFromInstruction(Insn, 21, 1);
2642 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2643 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2646 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Insn,
2647 uint64_t Address, const void *Decoder) {
2648 unsigned size = fieldFromInstruction(Insn, 6, 2);
2649 if (size == 3) return MCDisassembler::Fail;
2651 unsigned type = fieldFromInstruction(Insn, 8, 4);
2652 unsigned align = fieldFromInstruction(Insn, 4, 2);
2653 if (type == 8 && align == 3) return MCDisassembler::Fail;
2654 if (type == 9 && align == 3) return MCDisassembler::Fail;
2656 unsigned load = fieldFromInstruction(Insn, 21, 1);
2657 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2658 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2661 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Insn,
2662 uint64_t Address, const void *Decoder) {
2663 unsigned size = fieldFromInstruction(Insn, 6, 2);
2664 if (size == 3) return MCDisassembler::Fail;
2666 unsigned align = fieldFromInstruction(Insn, 4, 2);
2667 if (align & 2) return MCDisassembler::Fail;
2669 unsigned load = fieldFromInstruction(Insn, 21, 1);
2670 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2671 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2674 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Insn,
2675 uint64_t Address, const void *Decoder) {
2676 unsigned size = fieldFromInstruction(Insn, 6, 2);
2677 if (size == 3) return MCDisassembler::Fail;
2679 unsigned load = fieldFromInstruction(Insn, 21, 1);
2680 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2681 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2684 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2685 uint64_t Address, const void *Decoder) {
2686 DecodeStatus S = MCDisassembler::Success;
2688 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2689 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2690 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2691 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2692 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2693 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2695 // Writeback Operand
2696 switch (Inst.getOpcode()) {
2697 case ARM::VST1d8wb_fixed:
2698 case ARM::VST1d16wb_fixed:
2699 case ARM::VST1d32wb_fixed:
2700 case ARM::VST1d64wb_fixed:
2701 case ARM::VST1d8wb_register:
2702 case ARM::VST1d16wb_register:
2703 case ARM::VST1d32wb_register:
2704 case ARM::VST1d64wb_register:
2705 case ARM::VST1q8wb_fixed:
2706 case ARM::VST1q16wb_fixed:
2707 case ARM::VST1q32wb_fixed:
2708 case ARM::VST1q64wb_fixed:
2709 case ARM::VST1q8wb_register:
2710 case ARM::VST1q16wb_register:
2711 case ARM::VST1q32wb_register:
2712 case ARM::VST1q64wb_register:
2713 case ARM::VST1d8Twb_fixed:
2714 case ARM::VST1d16Twb_fixed:
2715 case ARM::VST1d32Twb_fixed:
2716 case ARM::VST1d64Twb_fixed:
2717 case ARM::VST1d8Twb_register:
2718 case ARM::VST1d16Twb_register:
2719 case ARM::VST1d32Twb_register:
2720 case ARM::VST1d64Twb_register:
2721 case ARM::VST1d8Qwb_fixed:
2722 case ARM::VST1d16Qwb_fixed:
2723 case ARM::VST1d32Qwb_fixed:
2724 case ARM::VST1d64Qwb_fixed:
2725 case ARM::VST1d8Qwb_register:
2726 case ARM::VST1d16Qwb_register:
2727 case ARM::VST1d32Qwb_register:
2728 case ARM::VST1d64Qwb_register:
2729 case ARM::VST2d8wb_fixed:
2730 case ARM::VST2d16wb_fixed:
2731 case ARM::VST2d32wb_fixed:
2732 case ARM::VST2d8wb_register:
2733 case ARM::VST2d16wb_register:
2734 case ARM::VST2d32wb_register:
2735 case ARM::VST2q8wb_fixed:
2736 case ARM::VST2q16wb_fixed:
2737 case ARM::VST2q32wb_fixed:
2738 case ARM::VST2q8wb_register:
2739 case ARM::VST2q16wb_register:
2740 case ARM::VST2q32wb_register:
2741 case ARM::VST2b8wb_fixed:
2742 case ARM::VST2b16wb_fixed:
2743 case ARM::VST2b32wb_fixed:
2744 case ARM::VST2b8wb_register:
2745 case ARM::VST2b16wb_register:
2746 case ARM::VST2b32wb_register:
2748 return MCDisassembler::Fail;
2749 Inst.addOperand(MCOperand::createImm(0));
2751 case ARM::VST3d8_UPD:
2752 case ARM::VST3d16_UPD:
2753 case ARM::VST3d32_UPD:
2754 case ARM::VST3q8_UPD:
2755 case ARM::VST3q16_UPD:
2756 case ARM::VST3q32_UPD:
2757 case ARM::VST4d8_UPD:
2758 case ARM::VST4d16_UPD:
2759 case ARM::VST4d32_UPD:
2760 case ARM::VST4q8_UPD:
2761 case ARM::VST4q16_UPD:
2762 case ARM::VST4q32_UPD:
2763 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2764 return MCDisassembler::Fail;
2770 // AddrMode6 Base (register+alignment)
2771 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2772 return MCDisassembler::Fail;
2774 // AddrMode6 Offset (register)
2775 switch (Inst.getOpcode()) {
2778 Inst.addOperand(MCOperand::createReg(0));
2779 else if (Rm != 0xF) {
2780 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2781 return MCDisassembler::Fail;
2784 case ARM::VST1d8wb_fixed:
2785 case ARM::VST1d16wb_fixed:
2786 case ARM::VST1d32wb_fixed:
2787 case ARM::VST1d64wb_fixed:
2788 case ARM::VST1q8wb_fixed:
2789 case ARM::VST1q16wb_fixed:
2790 case ARM::VST1q32wb_fixed:
2791 case ARM::VST1q64wb_fixed:
2792 case ARM::VST1d8Twb_fixed:
2793 case ARM::VST1d16Twb_fixed:
2794 case ARM::VST1d32Twb_fixed:
2795 case ARM::VST1d64Twb_fixed:
2796 case ARM::VST1d8Qwb_fixed:
2797 case ARM::VST1d16Qwb_fixed:
2798 case ARM::VST1d32Qwb_fixed:
2799 case ARM::VST1d64Qwb_fixed:
2800 case ARM::VST2d8wb_fixed:
2801 case ARM::VST2d16wb_fixed:
2802 case ARM::VST2d32wb_fixed:
2803 case ARM::VST2q8wb_fixed:
2804 case ARM::VST2q16wb_fixed:
2805 case ARM::VST2q32wb_fixed:
2806 case ARM::VST2b8wb_fixed:
2807 case ARM::VST2b16wb_fixed:
2808 case ARM::VST2b32wb_fixed:
2812 // First input register
2813 switch (Inst.getOpcode()) {
2818 case ARM::VST1q16wb_fixed:
2819 case ARM::VST1q16wb_register:
2820 case ARM::VST1q32wb_fixed:
2821 case ARM::VST1q32wb_register:
2822 case ARM::VST1q64wb_fixed:
2823 case ARM::VST1q64wb_register:
2824 case ARM::VST1q8wb_fixed:
2825 case ARM::VST1q8wb_register:
2829 case ARM::VST2d16wb_fixed:
2830 case ARM::VST2d16wb_register:
2831 case ARM::VST2d32wb_fixed:
2832 case ARM::VST2d32wb_register:
2833 case ARM::VST2d8wb_fixed:
2834 case ARM::VST2d8wb_register:
2835 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2836 return MCDisassembler::Fail;
2841 case ARM::VST2b16wb_fixed:
2842 case ARM::VST2b16wb_register:
2843 case ARM::VST2b32wb_fixed:
2844 case ARM::VST2b32wb_register:
2845 case ARM::VST2b8wb_fixed:
2846 case ARM::VST2b8wb_register:
2847 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2848 return MCDisassembler::Fail;
2851 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2852 return MCDisassembler::Fail;
2855 // Second input register
2856 switch (Inst.getOpcode()) {
2860 case ARM::VST3d8_UPD:
2861 case ARM::VST3d16_UPD:
2862 case ARM::VST3d32_UPD:
2866 case ARM::VST4d8_UPD:
2867 case ARM::VST4d16_UPD:
2868 case ARM::VST4d32_UPD:
2869 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2870 return MCDisassembler::Fail;
2875 case ARM::VST3q8_UPD:
2876 case ARM::VST3q16_UPD:
2877 case ARM::VST3q32_UPD:
2881 case ARM::VST4q8_UPD:
2882 case ARM::VST4q16_UPD:
2883 case ARM::VST4q32_UPD:
2884 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2885 return MCDisassembler::Fail;
2891 // Third input register
2892 switch (Inst.getOpcode()) {
2896 case ARM::VST3d8_UPD:
2897 case ARM::VST3d16_UPD:
2898 case ARM::VST3d32_UPD:
2902 case ARM::VST4d8_UPD:
2903 case ARM::VST4d16_UPD:
2904 case ARM::VST4d32_UPD:
2905 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2906 return MCDisassembler::Fail;
2911 case ARM::VST3q8_UPD:
2912 case ARM::VST3q16_UPD:
2913 case ARM::VST3q32_UPD:
2917 case ARM::VST4q8_UPD:
2918 case ARM::VST4q16_UPD:
2919 case ARM::VST4q32_UPD:
2920 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2921 return MCDisassembler::Fail;
2927 // Fourth input register
2928 switch (Inst.getOpcode()) {
2932 case ARM::VST4d8_UPD:
2933 case ARM::VST4d16_UPD:
2934 case ARM::VST4d32_UPD:
2935 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2936 return MCDisassembler::Fail;
2941 case ARM::VST4q8_UPD:
2942 case ARM::VST4q16_UPD:
2943 case ARM::VST4q32_UPD:
2944 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2945 return MCDisassembler::Fail;
2954 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2955 uint64_t Address, const void *Decoder) {
2956 DecodeStatus S = MCDisassembler::Success;
2958 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2959 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2960 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2961 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2962 unsigned align = fieldFromInstruction(Insn, 4, 1);
2963 unsigned size = fieldFromInstruction(Insn, 6, 2);
2965 if (size == 0 && align == 1)
2966 return MCDisassembler::Fail;
2967 align *= (1 << size);
2969 switch (Inst.getOpcode()) {
2970 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2971 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2972 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2973 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2974 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2975 return MCDisassembler::Fail;
2978 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2979 return MCDisassembler::Fail;
2983 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2984 return MCDisassembler::Fail;
2987 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2988 return MCDisassembler::Fail;
2989 Inst.addOperand(MCOperand::createImm(align));
2991 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2992 // variant encodes Rm == 0xf. Anything else is a register offset post-
2993 // increment and we need to add the register operand to the instruction.
2994 if (Rm != 0xD && Rm != 0xF &&
2995 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2996 return MCDisassembler::Fail;
3001 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
3002 uint64_t Address, const void *Decoder) {
3003 DecodeStatus S = MCDisassembler::Success;
3005 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3006 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3007 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3008 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3009 unsigned align = fieldFromInstruction(Insn, 4, 1);
3010 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
3013 switch (Inst.getOpcode()) {
3014 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
3015 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
3016 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
3017 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
3018 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
3019 return MCDisassembler::Fail;
3021 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
3022 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
3023 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
3024 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
3025 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
3026 return MCDisassembler::Fail;
3029 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3030 return MCDisassembler::Fail;
3035 Inst.addOperand(MCOperand::createImm(0));
3037 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3038 return MCDisassembler::Fail;
3039 Inst.addOperand(MCOperand::createImm(align));
3041 if (Rm != 0xD && Rm != 0xF) {
3042 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3043 return MCDisassembler::Fail;
3049 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
3050 uint64_t Address, const void *Decoder) {
3051 DecodeStatus S = MCDisassembler::Success;
3053 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3054 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3055 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3056 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3057 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
3059 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3060 return MCDisassembler::Fail;
3061 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
3062 return MCDisassembler::Fail;
3063 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
3064 return MCDisassembler::Fail;
3066 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3067 return MCDisassembler::Fail;
3070 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3071 return MCDisassembler::Fail;
3072 Inst.addOperand(MCOperand::createImm(0));
3075 Inst.addOperand(MCOperand::createReg(0));
3076 else if (Rm != 0xF) {
3077 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3078 return MCDisassembler::Fail;
3084 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
3085 uint64_t Address, const void *Decoder) {
3086 DecodeStatus S = MCDisassembler::Success;
3088 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3089 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3090 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3091 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3092 unsigned size = fieldFromInstruction(Insn, 6, 2);
3093 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
3094 unsigned align = fieldFromInstruction(Insn, 4, 1);
3098 return MCDisassembler::Fail;
3109 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3110 return MCDisassembler::Fail;
3111 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
3112 return MCDisassembler::Fail;
3113 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
3114 return MCDisassembler::Fail;
3115 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
3116 return MCDisassembler::Fail;
3118 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3119 return MCDisassembler::Fail;
3122 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3123 return MCDisassembler::Fail;
3124 Inst.addOperand(MCOperand::createImm(align));
3127 Inst.addOperand(MCOperand::createReg(0));
3128 else if (Rm != 0xF) {
3129 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3130 return MCDisassembler::Fail;
3137 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
3138 uint64_t Address, const void *Decoder) {
3139 DecodeStatus S = MCDisassembler::Success;
3141 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3142 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3143 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3144 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
3145 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
3146 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
3147 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
3148 unsigned Q = fieldFromInstruction(Insn, 6, 1);
3151 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3152 return MCDisassembler::Fail;
3154 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3155 return MCDisassembler::Fail;
3158 Inst.addOperand(MCOperand::createImm(imm));
3160 switch (Inst.getOpcode()) {
3161 case ARM::VORRiv4i16:
3162 case ARM::VORRiv2i32:
3163 case ARM::VBICiv4i16:
3164 case ARM::VBICiv2i32:
3165 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3166 return MCDisassembler::Fail;
3168 case ARM::VORRiv8i16:
3169 case ARM::VORRiv4i32:
3170 case ARM::VBICiv8i16:
3171 case ARM::VBICiv4i32:
3172 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3173 return MCDisassembler::Fail;
3182 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
3183 uint64_t Address, const void *Decoder) {
3184 DecodeStatus S = MCDisassembler::Success;
3186 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3187 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3188 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3189 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3190 unsigned size = fieldFromInstruction(Insn, 18, 2);
3192 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3193 return MCDisassembler::Fail;
3194 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3195 return MCDisassembler::Fail;
3196 Inst.addOperand(MCOperand::createImm(8 << size));
3201 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
3202 uint64_t Address, const void *Decoder) {
3203 Inst.addOperand(MCOperand::createImm(8 - Val));
3204 return MCDisassembler::Success;
3207 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
3208 uint64_t Address, const void *Decoder) {
3209 Inst.addOperand(MCOperand::createImm(16 - Val));
3210 return MCDisassembler::Success;
3213 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
3214 uint64_t Address, const void *Decoder) {
3215 Inst.addOperand(MCOperand::createImm(32 - Val));
3216 return MCDisassembler::Success;
3219 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
3220 uint64_t Address, const void *Decoder) {
3221 Inst.addOperand(MCOperand::createImm(64 - Val));
3222 return MCDisassembler::Success;
3225 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
3226 uint64_t Address, const void *Decoder) {
3227 DecodeStatus S = MCDisassembler::Success;
3229 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3230 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3231 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3232 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
3233 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3234 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3235 unsigned op = fieldFromInstruction(Insn, 6, 1);
3237 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3238 return MCDisassembler::Fail;
3240 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3241 return MCDisassembler::Fail; // Writeback
3244 switch (Inst.getOpcode()) {
3247 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3248 return MCDisassembler::Fail;
3251 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3252 return MCDisassembler::Fail;
3255 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3256 return MCDisassembler::Fail;
3261 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3262 uint64_t Address, const void *Decoder) {
3263 DecodeStatus S = MCDisassembler::Success;
3265 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3266 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3268 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3269 return MCDisassembler::Fail;
3271 switch(Inst.getOpcode()) {
3273 return MCDisassembler::Fail;
3275 break; // tADR does not explicitly represent the PC as an operand.
3277 Inst.addOperand(MCOperand::createReg(ARM::SP));
3281 Inst.addOperand(MCOperand::createImm(imm));
3285 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3286 uint64_t Address, const void *Decoder) {
3287 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3288 true, 2, Inst, Decoder))
3289 Inst.addOperand(MCOperand::createImm(SignExtend32<12>(Val << 1)));
3290 return MCDisassembler::Success;
3293 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3294 uint64_t Address, const void *Decoder) {
3295 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3296 true, 4, Inst, Decoder))
3297 Inst.addOperand(MCOperand::createImm(SignExtend32<21>(Val)));
3298 return MCDisassembler::Success;
3301 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3302 uint64_t Address, const void *Decoder) {
3303 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3304 true, 2, Inst, Decoder))
3305 Inst.addOperand(MCOperand::createImm(Val << 1));
3306 return MCDisassembler::Success;
3309 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3310 uint64_t Address, const void *Decoder) {
3311 DecodeStatus S = MCDisassembler::Success;
3313 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3314 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3316 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3317 return MCDisassembler::Fail;
3318 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3319 return MCDisassembler::Fail;
3324 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3325 uint64_t Address, const void *Decoder) {
3326 DecodeStatus S = MCDisassembler::Success;
3328 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3329 unsigned imm = fieldFromInstruction(Val, 3, 5);
3331 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3332 return MCDisassembler::Fail;
3333 Inst.addOperand(MCOperand::createImm(imm));
3338 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3339 uint64_t Address, const void *Decoder) {
3340 unsigned imm = Val << 2;
3342 Inst.addOperand(MCOperand::createImm(imm));
3343 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3345 return MCDisassembler::Success;
3348 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3349 uint64_t Address, const void *Decoder) {
3350 Inst.addOperand(MCOperand::createReg(ARM::SP));
3351 Inst.addOperand(MCOperand::createImm(Val));
3353 return MCDisassembler::Success;
3356 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3357 uint64_t Address, const void *Decoder) {
3358 DecodeStatus S = MCDisassembler::Success;
3360 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3361 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3362 unsigned imm = fieldFromInstruction(Val, 0, 2);
3364 // Thumb stores cannot use PC as dest register.
3365 switch (Inst.getOpcode()) {
3370 return MCDisassembler::Fail;
3376 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3377 return MCDisassembler::Fail;
3378 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3379 return MCDisassembler::Fail;
3380 Inst.addOperand(MCOperand::createImm(imm));
3385 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3386 uint64_t Address, const void *Decoder) {
3387 DecodeStatus S = MCDisassembler::Success;
3389 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3390 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3392 const FeatureBitset &featureBits =
3393 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
3395 bool hasMP = featureBits[ARM::FeatureMP];
3396 bool hasV7Ops = featureBits[ARM::HasV7Ops];
3399 switch (Inst.getOpcode()) {
3401 Inst.setOpcode(ARM::t2LDRBpci);
3404 Inst.setOpcode(ARM::t2LDRHpci);
3407 Inst.setOpcode(ARM::t2LDRSHpci);
3410 Inst.setOpcode(ARM::t2LDRSBpci);
3413 Inst.setOpcode(ARM::t2LDRpci);
3416 Inst.setOpcode(ARM::t2PLDpci);
3419 Inst.setOpcode(ARM::t2PLIpci);
3422 return MCDisassembler::Fail;
3425 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3429 switch (Inst.getOpcode()) {
3431 return MCDisassembler::Fail;
3433 Inst.setOpcode(ARM::t2PLDWs);
3436 Inst.setOpcode(ARM::t2PLIs);
3443 switch (Inst.getOpcode()) {
3448 return MCDisassembler::Fail;
3451 if (!hasV7Ops || !hasMP)
3452 return MCDisassembler::Fail;
3455 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3456 return MCDisassembler::Fail;
3459 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3460 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3461 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3462 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3463 return MCDisassembler::Fail;
3468 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
3469 uint64_t Address, const void* Decoder) {
3470 DecodeStatus S = MCDisassembler::Success;
3472 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3473 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3474 unsigned U = fieldFromInstruction(Insn, 9, 1);
3475 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3478 unsigned add = fieldFromInstruction(Insn, 9, 1);
3480 const FeatureBitset &featureBits =
3481 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
3483 bool hasMP = featureBits[ARM::FeatureMP];
3484 bool hasV7Ops = featureBits[ARM::HasV7Ops];
3487 switch (Inst.getOpcode()) {
3489 Inst.setOpcode(ARM::t2LDRpci);
3492 Inst.setOpcode(ARM::t2LDRBpci);
3494 case ARM::t2LDRSBi8:
3495 Inst.setOpcode(ARM::t2LDRSBpci);
3498 Inst.setOpcode(ARM::t2LDRHpci);
3500 case ARM::t2LDRSHi8:
3501 Inst.setOpcode(ARM::t2LDRSHpci);
3504 Inst.setOpcode(ARM::t2PLDpci);
3507 Inst.setOpcode(ARM::t2PLIpci);
3510 return MCDisassembler::Fail;
3512 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3516 switch (Inst.getOpcode()) {
3517 case ARM::t2LDRSHi8:
3518 return MCDisassembler::Fail;
3521 Inst.setOpcode(ARM::t2PLDWi8);
3523 case ARM::t2LDRSBi8:
3524 Inst.setOpcode(ARM::t2PLIi8);
3531 switch (Inst.getOpcode()) {
3536 return MCDisassembler::Fail;
3539 if (!hasV7Ops || !hasMP)
3540 return MCDisassembler::Fail;
3543 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3544 return MCDisassembler::Fail;
3547 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3548 return MCDisassembler::Fail;
3552 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
3553 uint64_t Address, const void* Decoder) {
3554 DecodeStatus S = MCDisassembler::Success;
3556 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3557 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3558 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3561 const FeatureBitset &featureBits =
3562 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
3564 bool hasMP = featureBits[ARM::FeatureMP];
3565 bool hasV7Ops = featureBits[ARM::HasV7Ops];
3568 switch (Inst.getOpcode()) {
3570 Inst.setOpcode(ARM::t2LDRpci);
3572 case ARM::t2LDRHi12:
3573 Inst.setOpcode(ARM::t2LDRHpci);
3575 case ARM::t2LDRSHi12:
3576 Inst.setOpcode(ARM::t2LDRSHpci);
3578 case ARM::t2LDRBi12:
3579 Inst.setOpcode(ARM::t2LDRBpci);
3581 case ARM::t2LDRSBi12:
3582 Inst.setOpcode(ARM::t2LDRSBpci);
3585 Inst.setOpcode(ARM::t2PLDpci);
3588 Inst.setOpcode(ARM::t2PLIpci);
3591 return MCDisassembler::Fail;
3593 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3597 switch (Inst.getOpcode()) {
3598 case ARM::t2LDRSHi12:
3599 return MCDisassembler::Fail;
3600 case ARM::t2LDRHi12:
3601 Inst.setOpcode(ARM::t2PLDWi12);
3603 case ARM::t2LDRSBi12:
3604 Inst.setOpcode(ARM::t2PLIi12);
3611 switch (Inst.getOpcode()) {
3616 return MCDisassembler::Fail;
3618 case ARM::t2PLDWi12:
3619 if (!hasV7Ops || !hasMP)
3620 return MCDisassembler::Fail;
3623 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3624 return MCDisassembler::Fail;
3627 if (!Check(S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder)))
3628 return MCDisassembler::Fail;
3632 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
3633 uint64_t Address, const void* Decoder) {
3634 DecodeStatus S = MCDisassembler::Success;
3636 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3637 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3638 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3642 switch (Inst.getOpcode()) {
3644 Inst.setOpcode(ARM::t2LDRpci);
3647 Inst.setOpcode(ARM::t2LDRBpci);
3650 Inst.setOpcode(ARM::t2LDRHpci);
3653 Inst.setOpcode(ARM::t2LDRSBpci);
3656 Inst.setOpcode(ARM::t2LDRSHpci);
3659 return MCDisassembler::Fail;
3661 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3664 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3665 return MCDisassembler::Fail;
3666 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3667 return MCDisassembler::Fail;
3671 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
3672 uint64_t Address, const void* Decoder) {
3673 DecodeStatus S = MCDisassembler::Success;
3675 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3676 unsigned U = fieldFromInstruction(Insn, 23, 1);
3677 int imm = fieldFromInstruction(Insn, 0, 12);
3679 const FeatureBitset &featureBits =
3680 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
3682 bool hasV7Ops = featureBits[ARM::HasV7Ops];
3685 switch (Inst.getOpcode()) {
3686 case ARM::t2LDRBpci:
3687 case ARM::t2LDRHpci:
3688 Inst.setOpcode(ARM::t2PLDpci);
3690 case ARM::t2LDRSBpci:
3691 Inst.setOpcode(ARM::t2PLIpci);
3693 case ARM::t2LDRSHpci:
3694 return MCDisassembler::Fail;
3700 switch(Inst.getOpcode()) {
3705 return MCDisassembler::Fail;
3708 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3709 return MCDisassembler::Fail;
3713 // Special case for #-0.
3719 Inst.addOperand(MCOperand::createImm(imm));
3724 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3725 uint64_t Address, const void *Decoder) {
3727 Inst.addOperand(MCOperand::createImm(INT32_MIN));
3729 int imm = Val & 0xFF;
3731 if (!(Val & 0x100)) imm *= -1;
3732 Inst.addOperand(MCOperand::createImm(imm * 4));
3735 return MCDisassembler::Success;
3738 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3739 uint64_t Address, const void *Decoder) {
3740 DecodeStatus S = MCDisassembler::Success;
3742 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3743 unsigned imm = fieldFromInstruction(Val, 0, 9);
3745 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3746 return MCDisassembler::Fail;
3747 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3748 return MCDisassembler::Fail;
3753 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3754 uint64_t Address, const void *Decoder) {
3755 DecodeStatus S = MCDisassembler::Success;
3757 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3758 unsigned imm = fieldFromInstruction(Val, 0, 8);
3760 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3761 return MCDisassembler::Fail;
3763 Inst.addOperand(MCOperand::createImm(imm));
3768 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3769 uint64_t Address, const void *Decoder) {
3770 int imm = Val & 0xFF;
3773 else if (!(Val & 0x100))
3775 Inst.addOperand(MCOperand::createImm(imm));
3777 return MCDisassembler::Success;
3780 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3781 uint64_t Address, const void *Decoder) {
3782 DecodeStatus S = MCDisassembler::Success;
3784 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3785 unsigned imm = fieldFromInstruction(Val, 0, 9);
3787 // Thumb stores cannot use PC as dest register.
3788 switch (Inst.getOpcode()) {
3796 return MCDisassembler::Fail;
3802 // Some instructions always use an additive offset.
3803 switch (Inst.getOpcode()) {
3818 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3819 return MCDisassembler::Fail;
3820 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3821 return MCDisassembler::Fail;
3826 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3827 uint64_t Address, const void *Decoder) {
3828 DecodeStatus S = MCDisassembler::Success;
3830 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3831 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3832 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3833 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3835 unsigned load = fieldFromInstruction(Insn, 20, 1);
3838 switch (Inst.getOpcode()) {
3839 case ARM::t2LDR_PRE:
3840 case ARM::t2LDR_POST:
3841 Inst.setOpcode(ARM::t2LDRpci);
3843 case ARM::t2LDRB_PRE:
3844 case ARM::t2LDRB_POST:
3845 Inst.setOpcode(ARM::t2LDRBpci);
3847 case ARM::t2LDRH_PRE:
3848 case ARM::t2LDRH_POST:
3849 Inst.setOpcode(ARM::t2LDRHpci);
3851 case ARM::t2LDRSB_PRE:
3852 case ARM::t2LDRSB_POST:
3854 Inst.setOpcode(ARM::t2PLIpci);
3856 Inst.setOpcode(ARM::t2LDRSBpci);
3858 case ARM::t2LDRSH_PRE:
3859 case ARM::t2LDRSH_POST:
3860 Inst.setOpcode(ARM::t2LDRSHpci);
3863 return MCDisassembler::Fail;
3865 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3869 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3870 return MCDisassembler::Fail;
3873 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3874 return MCDisassembler::Fail;
3877 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3878 return MCDisassembler::Fail;
3881 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3882 return MCDisassembler::Fail;
3887 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3888 uint64_t Address, const void *Decoder) {
3889 DecodeStatus S = MCDisassembler::Success;
3891 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3892 unsigned imm = fieldFromInstruction(Val, 0, 12);
3894 // Thumb stores cannot use PC as dest register.
3895 switch (Inst.getOpcode()) {
3897 case ARM::t2STRBi12:
3898 case ARM::t2STRHi12:
3900 return MCDisassembler::Fail;
3906 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3907 return MCDisassembler::Fail;
3908 Inst.addOperand(MCOperand::createImm(imm));
3913 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3914 uint64_t Address, const void *Decoder) {
3915 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3917 Inst.addOperand(MCOperand::createReg(ARM::SP));
3918 Inst.addOperand(MCOperand::createReg(ARM::SP));
3919 Inst.addOperand(MCOperand::createImm(imm));
3921 return MCDisassembler::Success;
3924 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3925 uint64_t Address, const void *Decoder) {
3926 DecodeStatus S = MCDisassembler::Success;
3928 if (Inst.getOpcode() == ARM::tADDrSP) {
3929 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3930 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3932 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3933 return MCDisassembler::Fail;
3934 Inst.addOperand(MCOperand::createReg(ARM::SP));
3935 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3936 return MCDisassembler::Fail;
3937 } else if (Inst.getOpcode() == ARM::tADDspr) {
3938 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3940 Inst.addOperand(MCOperand::createReg(ARM::SP));
3941 Inst.addOperand(MCOperand::createReg(ARM::SP));
3942 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3943 return MCDisassembler::Fail;
3949 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3950 uint64_t Address, const void *Decoder) {
3951 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3952 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3954 Inst.addOperand(MCOperand::createImm(imod));
3955 Inst.addOperand(MCOperand::createImm(flags));
3957 return MCDisassembler::Success;
3960 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3961 uint64_t Address, const void *Decoder) {
3962 DecodeStatus S = MCDisassembler::Success;
3963 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3964 unsigned add = fieldFromInstruction(Insn, 4, 1);
3966 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3967 return MCDisassembler::Fail;
3968 Inst.addOperand(MCOperand::createImm(add));
3973 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3974 uint64_t Address, const void *Decoder) {
3975 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3976 // Note only one trailing zero not two. Also the J1 and J2 values are from
3977 // the encoded instruction. So here change to I1 and I2 values via:
3978 // I1 = NOT(J1 EOR S);
3979 // I2 = NOT(J2 EOR S);
3980 // and build the imm32 with two trailing zeros as documented:
3981 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3982 unsigned S = (Val >> 23) & 1;
3983 unsigned J1 = (Val >> 22) & 1;
3984 unsigned J2 = (Val >> 21) & 1;
3985 unsigned I1 = !(J1 ^ S);
3986 unsigned I2 = !(J2 ^ S);
3987 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3988 int imm32 = SignExtend32<25>(tmp << 1);
3990 if (!tryAddingSymbolicOperand(Address,
3991 (Address & ~2u) + imm32 + 4,
3992 true, 4, Inst, Decoder))
3993 Inst.addOperand(MCOperand::createImm(imm32));
3994 return MCDisassembler::Success;
3997 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3998 uint64_t Address, const void *Decoder) {
3999 if (Val == 0xA || Val == 0xB)
4000 return MCDisassembler::Fail;
4002 const FeatureBitset &featureBits =
4003 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
4005 if (featureBits[ARM::HasV8Ops] && !(Val == 14 || Val == 15))
4006 return MCDisassembler::Fail;
4008 Inst.addOperand(MCOperand::createImm(Val));
4009 return MCDisassembler::Success;
4013 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
4014 uint64_t Address, const void *Decoder) {
4015 DecodeStatus S = MCDisassembler::Success;
4017 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4018 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4020 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
4021 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4022 return MCDisassembler::Fail;
4023 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
4024 return MCDisassembler::Fail;
4029 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
4030 uint64_t Address, const void *Decoder) {
4031 DecodeStatus S = MCDisassembler::Success;
4033 unsigned pred = fieldFromInstruction(Insn, 22, 4);
4034 if (pred == 0xE || pred == 0xF) {
4035 unsigned opc = fieldFromInstruction(Insn, 4, 28);
4038 return MCDisassembler::Fail;
4040 Inst.setOpcode(ARM::t2DSB);
4043 Inst.setOpcode(ARM::t2DMB);
4046 Inst.setOpcode(ARM::t2ISB);
4050 unsigned imm = fieldFromInstruction(Insn, 0, 4);
4051 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
4054 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
4055 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
4056 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
4057 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
4058 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
4060 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
4061 return MCDisassembler::Fail;
4062 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4063 return MCDisassembler::Fail;
4068 // Decode a shifted immediate operand. These basically consist
4069 // of an 8-bit value, and a 4-bit directive that specifies either
4070 // a splat operation or a rotation.
4071 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
4072 uint64_t Address, const void *Decoder) {
4073 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
4075 unsigned byte = fieldFromInstruction(Val, 8, 2);
4076 unsigned imm = fieldFromInstruction(Val, 0, 8);
4079 Inst.addOperand(MCOperand::createImm(imm));
4082 Inst.addOperand(MCOperand::createImm((imm << 16) | imm));
4085 Inst.addOperand(MCOperand::createImm((imm << 24) | (imm << 8)));
4088 Inst.addOperand(MCOperand::createImm((imm << 24) | (imm << 16) |
4093 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
4094 unsigned rot = fieldFromInstruction(Val, 7, 5);
4095 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
4096 Inst.addOperand(MCOperand::createImm(imm));
4099 return MCDisassembler::Success;
4103 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
4104 uint64_t Address, const void *Decoder) {
4105 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
4106 true, 2, Inst, Decoder))
4107 Inst.addOperand(MCOperand::createImm(SignExtend32<9>(Val << 1)));
4108 return MCDisassembler::Success;
4111 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
4113 const void *Decoder) {
4114 // Val is passed in as S:J1:J2:imm10:imm11
4115 // Note no trailing zero after imm11. Also the J1 and J2 values are from
4116 // the encoded instruction. So here change to I1 and I2 values via:
4117 // I1 = NOT(J1 EOR S);
4118 // I2 = NOT(J2 EOR S);
4119 // and build the imm32 with one trailing zero as documented:
4120 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
4121 unsigned S = (Val >> 23) & 1;
4122 unsigned J1 = (Val >> 22) & 1;
4123 unsigned J2 = (Val >> 21) & 1;
4124 unsigned I1 = !(J1 ^ S);
4125 unsigned I2 = !(J2 ^ S);
4126 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
4127 int imm32 = SignExtend32<25>(tmp << 1);
4129 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
4130 true, 4, Inst, Decoder))
4131 Inst.addOperand(MCOperand::createImm(imm32));
4132 return MCDisassembler::Success;
4135 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
4136 uint64_t Address, const void *Decoder) {
4138 return MCDisassembler::Fail;
4140 Inst.addOperand(MCOperand::createImm(Val));
4141 return MCDisassembler::Success;
4144 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val,
4145 uint64_t Address, const void *Decoder) {
4147 return MCDisassembler::Fail;
4149 Inst.addOperand(MCOperand::createImm(Val));
4150 return MCDisassembler::Success;
4153 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
4154 uint64_t Address, const void *Decoder) {
4155 DecodeStatus S = MCDisassembler::Success;
4156 const FeatureBitset &FeatureBits =
4157 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
4159 if (FeatureBits[ARM::FeatureMClass]) {
4160 unsigned ValLow = Val & 0xff;
4162 // Validate the SYSm value first.
4177 case 18: // basepri_max
4178 case 19: // faultmask
4179 if (!(FeatureBits[ARM::HasV7Ops]))
4180 // Values basepri, basepri_max and faultmask are only valid for v7m.
4181 return MCDisassembler::Fail;
4183 case 0x8a: // msplim_ns
4184 case 0x8b: // psplim_ns
4185 case 0x91: // basepri_ns
4186 case 0x93: // faultmask_ns
4187 if (!(FeatureBits[ARM::HasV8MMainlineOps]))
4188 return MCDisassembler::Fail;
4192 case 0x88: // msp_ns
4193 case 0x89: // psp_ns
4194 case 0x90: // primask_ns
4195 case 0x94: // control_ns
4197 if (!(FeatureBits[ARM::Feature8MSecExt]))
4198 return MCDisassembler::Fail;
4201 // Architecturally defined as unpredictable
4202 S = MCDisassembler::SoftFail;
4206 if (Inst.getOpcode() == ARM::t2MSR_M) {
4207 unsigned Mask = fieldFromInstruction(Val, 10, 2);
4208 if (!(FeatureBits[ARM::HasV7Ops])) {
4209 // The ARMv6-M MSR bits {11-10} can be only 0b10, other values are
4212 S = MCDisassembler::SoftFail;
4215 // The ARMv7-M architecture stores an additional 2-bit mask value in
4216 // MSR bits {11-10}. The mask is used only with apsr, iapsr, eapsr and
4217 // xpsr, it has to be 0b10 in other cases. Bit mask{1} indicates if
4218 // the NZCVQ bits should be moved by the instruction. Bit mask{0}
4219 // indicates the move for the GE{3:0} bits, the mask{0} bit can be set
4220 // only if the processor includes the DSP extension.
4221 if (Mask == 0 || (Mask != 2 && ValLow > 3) ||
4222 (!(FeatureBits[ARM::FeatureDSP]) && (Mask & 1)))
4223 S = MCDisassembler::SoftFail;
4229 return MCDisassembler::Fail;
4231 Inst.addOperand(MCOperand::createImm(Val));
4235 static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Val,
4236 uint64_t Address, const void *Decoder) {
4237 unsigned R = fieldFromInstruction(Val, 5, 1);
4238 unsigned SysM = fieldFromInstruction(Val, 0, 5);
4240 // The table of encodings for these banked registers comes from B9.2.3 of the
4241 // ARM ARM. There are patterns, but nothing regular enough to make this logic
4242 // neater. So by fiat, these values are UNPREDICTABLE:
4243 if (!ARMBankedReg::lookupBankedRegByEncoding((R << 5) | SysM))
4244 return MCDisassembler::Fail;
4246 Inst.addOperand(MCOperand::createImm(Val));
4247 return MCDisassembler::Success;
4250 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
4251 uint64_t Address, const void *Decoder) {
4252 DecodeStatus S = MCDisassembler::Success;
4254 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4255 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4256 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4259 S = MCDisassembler::SoftFail;
4261 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
4262 return MCDisassembler::Fail;
4263 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4264 return MCDisassembler::Fail;
4265 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4266 return MCDisassembler::Fail;
4271 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
4273 const void *Decoder) {
4274 DecodeStatus S = MCDisassembler::Success;
4276 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4277 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
4278 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4279 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4281 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
4282 return MCDisassembler::Fail;
4284 if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1)
4285 S = MCDisassembler::SoftFail;
4287 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
4288 return MCDisassembler::Fail;
4289 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4290 return MCDisassembler::Fail;
4291 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4292 return MCDisassembler::Fail;
4297 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
4298 uint64_t Address, const void *Decoder) {
4299 DecodeStatus S = MCDisassembler::Success;
4301 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4302 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4303 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4304 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4305 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4306 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4308 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4310 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4311 return MCDisassembler::Fail;
4312 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4313 return MCDisassembler::Fail;
4314 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4315 return MCDisassembler::Fail;
4316 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4317 return MCDisassembler::Fail;
4322 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
4323 uint64_t Address, const void *Decoder) {
4324 DecodeStatus S = MCDisassembler::Success;
4326 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4327 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4328 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4329 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4330 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4331 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4332 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4334 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4335 if (Rm == 0xF) S = MCDisassembler::SoftFail;
4337 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4338 return MCDisassembler::Fail;
4339 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4340 return MCDisassembler::Fail;
4341 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4342 return MCDisassembler::Fail;
4343 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4344 return MCDisassembler::Fail;
4349 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
4350 uint64_t Address, const void *Decoder) {
4351 DecodeStatus S = MCDisassembler::Success;
4353 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4354 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4355 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4356 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4357 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4358 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4360 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4362 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4363 return MCDisassembler::Fail;
4364 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4365 return MCDisassembler::Fail;
4366 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4367 return MCDisassembler::Fail;
4368 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4369 return MCDisassembler::Fail;
4374 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
4375 uint64_t Address, const void *Decoder) {
4376 DecodeStatus S = MCDisassembler::Success;
4378 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4379 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4380 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4381 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4382 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4383 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4385 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4387 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4388 return MCDisassembler::Fail;
4389 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4390 return MCDisassembler::Fail;
4391 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4392 return MCDisassembler::Fail;
4393 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4394 return MCDisassembler::Fail;
4399 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
4400 uint64_t Address, const void *Decoder) {
4401 DecodeStatus S = MCDisassembler::Success;
4403 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4404 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4405 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4406 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4407 unsigned size = fieldFromInstruction(Insn, 10, 2);
4413 return MCDisassembler::Fail;
4415 if (fieldFromInstruction(Insn, 4, 1))
4416 return MCDisassembler::Fail; // UNDEFINED
4417 index = fieldFromInstruction(Insn, 5, 3);
4420 if (fieldFromInstruction(Insn, 5, 1))
4421 return MCDisassembler::Fail; // UNDEFINED
4422 index = fieldFromInstruction(Insn, 6, 2);
4423 if (fieldFromInstruction(Insn, 4, 1))
4427 if (fieldFromInstruction(Insn, 6, 1))
4428 return MCDisassembler::Fail; // UNDEFINED
4429 index = fieldFromInstruction(Insn, 7, 1);
4431 switch (fieldFromInstruction(Insn, 4, 2)) {
4437 return MCDisassembler::Fail;
4442 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4443 return MCDisassembler::Fail;
4444 if (Rm != 0xF) { // Writeback
4445 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4446 return MCDisassembler::Fail;
4448 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4449 return MCDisassembler::Fail;
4450 Inst.addOperand(MCOperand::createImm(align));
4453 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4454 return MCDisassembler::Fail;
4456 Inst.addOperand(MCOperand::createReg(0));
4459 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4460 return MCDisassembler::Fail;
4461 Inst.addOperand(MCOperand::createImm(index));
4466 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
4467 uint64_t Address, const void *Decoder) {
4468 DecodeStatus S = MCDisassembler::Success;
4470 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4471 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4472 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4473 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4474 unsigned size = fieldFromInstruction(Insn, 10, 2);
4480 return MCDisassembler::Fail;
4482 if (fieldFromInstruction(Insn, 4, 1))
4483 return MCDisassembler::Fail; // UNDEFINED
4484 index = fieldFromInstruction(Insn, 5, 3);
4487 if (fieldFromInstruction(Insn, 5, 1))
4488 return MCDisassembler::Fail; // UNDEFINED
4489 index = fieldFromInstruction(Insn, 6, 2);
4490 if (fieldFromInstruction(Insn, 4, 1))
4494 if (fieldFromInstruction(Insn, 6, 1))
4495 return MCDisassembler::Fail; // UNDEFINED
4496 index = fieldFromInstruction(Insn, 7, 1);
4498 switch (fieldFromInstruction(Insn, 4, 2)) {
4504 return MCDisassembler::Fail;
4509 if (Rm != 0xF) { // Writeback
4510 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4511 return MCDisassembler::Fail;
4513 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4514 return MCDisassembler::Fail;
4515 Inst.addOperand(MCOperand::createImm(align));
4518 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4519 return MCDisassembler::Fail;
4521 Inst.addOperand(MCOperand::createReg(0));
4524 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4525 return MCDisassembler::Fail;
4526 Inst.addOperand(MCOperand::createImm(index));
4531 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
4532 uint64_t Address, const void *Decoder) {
4533 DecodeStatus S = MCDisassembler::Success;
4535 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4536 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4537 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4538 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4539 unsigned size = fieldFromInstruction(Insn, 10, 2);
4546 return MCDisassembler::Fail;
4548 index = fieldFromInstruction(Insn, 5, 3);
4549 if (fieldFromInstruction(Insn, 4, 1))
4553 index = fieldFromInstruction(Insn, 6, 2);
4554 if (fieldFromInstruction(Insn, 4, 1))
4556 if (fieldFromInstruction(Insn, 5, 1))
4560 if (fieldFromInstruction(Insn, 5, 1))
4561 return MCDisassembler::Fail; // UNDEFINED
4562 index = fieldFromInstruction(Insn, 7, 1);
4563 if (fieldFromInstruction(Insn, 4, 1) != 0)
4565 if (fieldFromInstruction(Insn, 6, 1))
4570 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4571 return MCDisassembler::Fail;
4572 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4573 return MCDisassembler::Fail;
4574 if (Rm != 0xF) { // Writeback
4575 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4576 return MCDisassembler::Fail;
4578 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4579 return MCDisassembler::Fail;
4580 Inst.addOperand(MCOperand::createImm(align));
4583 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4584 return MCDisassembler::Fail;
4586 Inst.addOperand(MCOperand::createReg(0));
4589 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4590 return MCDisassembler::Fail;
4591 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4592 return MCDisassembler::Fail;
4593 Inst.addOperand(MCOperand::createImm(index));
4598 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
4599 uint64_t Address, const void *Decoder) {
4600 DecodeStatus S = MCDisassembler::Success;
4602 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4603 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4604 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4605 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4606 unsigned size = fieldFromInstruction(Insn, 10, 2);
4613 return MCDisassembler::Fail;
4615 index = fieldFromInstruction(Insn, 5, 3);
4616 if (fieldFromInstruction(Insn, 4, 1))
4620 index = fieldFromInstruction(Insn, 6, 2);
4621 if (fieldFromInstruction(Insn, 4, 1))
4623 if (fieldFromInstruction(Insn, 5, 1))
4627 if (fieldFromInstruction(Insn, 5, 1))
4628 return MCDisassembler::Fail; // UNDEFINED
4629 index = fieldFromInstruction(Insn, 7, 1);
4630 if (fieldFromInstruction(Insn, 4, 1) != 0)
4632 if (fieldFromInstruction(Insn, 6, 1))
4637 if (Rm != 0xF) { // Writeback
4638 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4639 return MCDisassembler::Fail;
4641 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4642 return MCDisassembler::Fail;
4643 Inst.addOperand(MCOperand::createImm(align));
4646 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4647 return MCDisassembler::Fail;
4649 Inst.addOperand(MCOperand::createReg(0));
4652 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4653 return MCDisassembler::Fail;
4654 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4655 return MCDisassembler::Fail;
4656 Inst.addOperand(MCOperand::createImm(index));
4661 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
4662 uint64_t Address, const void *Decoder) {
4663 DecodeStatus S = MCDisassembler::Success;
4665 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4666 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4667 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4668 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4669 unsigned size = fieldFromInstruction(Insn, 10, 2);
4676 return MCDisassembler::Fail;
4678 if (fieldFromInstruction(Insn, 4, 1))
4679 return MCDisassembler::Fail; // UNDEFINED
4680 index = fieldFromInstruction(Insn, 5, 3);
4683 if (fieldFromInstruction(Insn, 4, 1))
4684 return MCDisassembler::Fail; // UNDEFINED
4685 index = fieldFromInstruction(Insn, 6, 2);
4686 if (fieldFromInstruction(Insn, 5, 1))
4690 if (fieldFromInstruction(Insn, 4, 2))
4691 return MCDisassembler::Fail; // UNDEFINED
4692 index = fieldFromInstruction(Insn, 7, 1);
4693 if (fieldFromInstruction(Insn, 6, 1))
4698 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4699 return MCDisassembler::Fail;
4700 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4701 return MCDisassembler::Fail;
4702 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4703 return MCDisassembler::Fail;
4705 if (Rm != 0xF) { // Writeback
4706 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4707 return MCDisassembler::Fail;
4709 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4710 return MCDisassembler::Fail;
4711 Inst.addOperand(MCOperand::createImm(align));
4714 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4715 return MCDisassembler::Fail;
4717 Inst.addOperand(MCOperand::createReg(0));
4720 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4721 return MCDisassembler::Fail;
4722 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4723 return MCDisassembler::Fail;
4724 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4725 return MCDisassembler::Fail;
4726 Inst.addOperand(MCOperand::createImm(index));
4731 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4732 uint64_t Address, const void *Decoder) {
4733 DecodeStatus S = MCDisassembler::Success;
4735 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4736 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4737 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4738 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4739 unsigned size = fieldFromInstruction(Insn, 10, 2);
4746 return MCDisassembler::Fail;
4748 if (fieldFromInstruction(Insn, 4, 1))
4749 return MCDisassembler::Fail; // UNDEFINED
4750 index = fieldFromInstruction(Insn, 5, 3);
4753 if (fieldFromInstruction(Insn, 4, 1))
4754 return MCDisassembler::Fail; // UNDEFINED
4755 index = fieldFromInstruction(Insn, 6, 2);
4756 if (fieldFromInstruction(Insn, 5, 1))
4760 if (fieldFromInstruction(Insn, 4, 2))
4761 return MCDisassembler::Fail; // UNDEFINED
4762 index = fieldFromInstruction(Insn, 7, 1);
4763 if (fieldFromInstruction(Insn, 6, 1))
4768 if (Rm != 0xF) { // Writeback
4769 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4770 return MCDisassembler::Fail;
4772 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4773 return MCDisassembler::Fail;
4774 Inst.addOperand(MCOperand::createImm(align));
4777 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4778 return MCDisassembler::Fail;
4780 Inst.addOperand(MCOperand::createReg(0));
4783 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4784 return MCDisassembler::Fail;
4785 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4786 return MCDisassembler::Fail;
4787 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4788 return MCDisassembler::Fail;
4789 Inst.addOperand(MCOperand::createImm(index));
4794 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4795 uint64_t Address, const void *Decoder) {
4796 DecodeStatus S = MCDisassembler::Success;
4798 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4799 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4800 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4801 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4802 unsigned size = fieldFromInstruction(Insn, 10, 2);
4809 return MCDisassembler::Fail;
4811 if (fieldFromInstruction(Insn, 4, 1))
4813 index = fieldFromInstruction(Insn, 5, 3);
4816 if (fieldFromInstruction(Insn, 4, 1))
4818 index = fieldFromInstruction(Insn, 6, 2);
4819 if (fieldFromInstruction(Insn, 5, 1))
4823 switch (fieldFromInstruction(Insn, 4, 2)) {
4827 return MCDisassembler::Fail;
4829 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4832 index = fieldFromInstruction(Insn, 7, 1);
4833 if (fieldFromInstruction(Insn, 6, 1))
4838 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4839 return MCDisassembler::Fail;
4840 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4841 return MCDisassembler::Fail;
4842 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4843 return MCDisassembler::Fail;
4844 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4845 return MCDisassembler::Fail;
4847 if (Rm != 0xF) { // Writeback
4848 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4849 return MCDisassembler::Fail;
4851 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4852 return MCDisassembler::Fail;
4853 Inst.addOperand(MCOperand::createImm(align));
4856 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4857 return MCDisassembler::Fail;
4859 Inst.addOperand(MCOperand::createReg(0));
4862 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4863 return MCDisassembler::Fail;
4864 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4865 return MCDisassembler::Fail;
4866 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4867 return MCDisassembler::Fail;
4868 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4869 return MCDisassembler::Fail;
4870 Inst.addOperand(MCOperand::createImm(index));
4875 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4876 uint64_t Address, const void *Decoder) {
4877 DecodeStatus S = MCDisassembler::Success;
4879 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4880 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4881 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4882 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4883 unsigned size = fieldFromInstruction(Insn, 10, 2);
4890 return MCDisassembler::Fail;
4892 if (fieldFromInstruction(Insn, 4, 1))
4894 index = fieldFromInstruction(Insn, 5, 3);
4897 if (fieldFromInstruction(Insn, 4, 1))
4899 index = fieldFromInstruction(Insn, 6, 2);
4900 if (fieldFromInstruction(Insn, 5, 1))
4904 switch (fieldFromInstruction(Insn, 4, 2)) {
4908 return MCDisassembler::Fail;
4910 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4913 index = fieldFromInstruction(Insn, 7, 1);
4914 if (fieldFromInstruction(Insn, 6, 1))
4919 if (Rm != 0xF) { // Writeback
4920 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4921 return MCDisassembler::Fail;
4923 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4924 return MCDisassembler::Fail;
4925 Inst.addOperand(MCOperand::createImm(align));
4928 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4929 return MCDisassembler::Fail;
4931 Inst.addOperand(MCOperand::createReg(0));
4934 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4935 return MCDisassembler::Fail;
4936 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4937 return MCDisassembler::Fail;
4938 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4939 return MCDisassembler::Fail;
4940 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4941 return MCDisassembler::Fail;
4942 Inst.addOperand(MCOperand::createImm(index));
4947 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4948 uint64_t Address, const void *Decoder) {
4949 DecodeStatus S = MCDisassembler::Success;
4950 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4951 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4952 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4953 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4954 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4956 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4957 S = MCDisassembler::SoftFail;
4959 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4960 return MCDisassembler::Fail;
4961 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4962 return MCDisassembler::Fail;
4963 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4964 return MCDisassembler::Fail;
4965 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4966 return MCDisassembler::Fail;
4967 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4968 return MCDisassembler::Fail;
4973 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4974 uint64_t Address, const void *Decoder) {
4975 DecodeStatus S = MCDisassembler::Success;
4976 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4977 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4978 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4979 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4980 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4982 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4983 S = MCDisassembler::SoftFail;
4985 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4986 return MCDisassembler::Fail;
4987 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4988 return MCDisassembler::Fail;
4989 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4990 return MCDisassembler::Fail;
4991 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4992 return MCDisassembler::Fail;
4993 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4994 return MCDisassembler::Fail;
4999 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
5000 uint64_t Address, const void *Decoder) {
5001 DecodeStatus S = MCDisassembler::Success;
5002 unsigned pred = fieldFromInstruction(Insn, 4, 4);
5003 unsigned mask = fieldFromInstruction(Insn, 0, 4);
5007 S = MCDisassembler::SoftFail;
5011 return MCDisassembler::Fail;
5013 Inst.addOperand(MCOperand::createImm(pred));
5014 Inst.addOperand(MCOperand::createImm(mask));
5019 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
5020 uint64_t Address, const void *Decoder) {
5021 DecodeStatus S = MCDisassembler::Success;
5023 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
5024 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
5025 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
5026 unsigned addr = fieldFromInstruction(Insn, 0, 8);
5027 unsigned W = fieldFromInstruction(Insn, 21, 1);
5028 unsigned U = fieldFromInstruction(Insn, 23, 1);
5029 unsigned P = fieldFromInstruction(Insn, 24, 1);
5030 bool writeback = (W == 1) | (P == 0);
5032 addr |= (U << 8) | (Rn << 9);
5034 if (writeback && (Rn == Rt || Rn == Rt2))
5035 Check(S, MCDisassembler::SoftFail);
5037 Check(S, MCDisassembler::SoftFail);
5040 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
5041 return MCDisassembler::Fail;
5043 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
5044 return MCDisassembler::Fail;
5045 // Writeback operand
5046 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
5047 return MCDisassembler::Fail;
5049 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
5050 return MCDisassembler::Fail;
5056 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
5057 uint64_t Address, const void *Decoder) {
5058 DecodeStatus S = MCDisassembler::Success;
5060 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
5061 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
5062 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
5063 unsigned addr = fieldFromInstruction(Insn, 0, 8);
5064 unsigned W = fieldFromInstruction(Insn, 21, 1);
5065 unsigned U = fieldFromInstruction(Insn, 23, 1);
5066 unsigned P = fieldFromInstruction(Insn, 24, 1);
5067 bool writeback = (W == 1) | (P == 0);
5069 addr |= (U << 8) | (Rn << 9);
5071 if (writeback && (Rn == Rt || Rn == Rt2))
5072 Check(S, MCDisassembler::SoftFail);
5074 // Writeback operand
5075 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
5076 return MCDisassembler::Fail;
5078 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
5079 return MCDisassembler::Fail;
5081 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
5082 return MCDisassembler::Fail;
5084 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
5085 return MCDisassembler::Fail;
5090 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
5091 uint64_t Address, const void *Decoder) {
5092 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
5093 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
5094 if (sign1 != sign2) return MCDisassembler::Fail;
5096 unsigned Val = fieldFromInstruction(Insn, 0, 8);
5097 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
5098 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
5100 Inst.addOperand(MCOperand::createImm(SignExtend32<13>(Val)));
5102 return MCDisassembler::Success;
5105 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
5107 const void *Decoder) {
5108 DecodeStatus S = MCDisassembler::Success;
5110 // Shift of "asr #32" is not allowed in Thumb2 mode.
5111 if (Val == 0x20) S = MCDisassembler::Fail;
5112 Inst.addOperand(MCOperand::createImm(Val));
5116 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
5117 uint64_t Address, const void *Decoder) {
5118 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
5119 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
5120 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
5121 unsigned pred = fieldFromInstruction(Insn, 28, 4);
5124 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
5126 DecodeStatus S = MCDisassembler::Success;
5128 if (Rt == Rn || Rn == Rt2)
5129 S = MCDisassembler::SoftFail;
5131 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5132 return MCDisassembler::Fail;
5133 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
5134 return MCDisassembler::Fail;
5135 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
5136 return MCDisassembler::Fail;
5137 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
5138 return MCDisassembler::Fail;
5143 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
5144 uint64_t Address, const void *Decoder) {
5145 const FeatureBitset &featureBits =
5146 ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits();
5147 bool hasFullFP16 = featureBits[ARM::FeatureFullFP16];
5149 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
5150 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
5151 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
5152 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
5153 unsigned imm = fieldFromInstruction(Insn, 16, 6);
5154 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
5155 unsigned op = fieldFromInstruction(Insn, 5, 1);
5157 DecodeStatus S = MCDisassembler::Success;
5159 // If the top 3 bits of imm are clear, this is a VMOV (immediate)
5160 if (!(imm & 0x38)) {
5162 if (op == 1) return MCDisassembler::Fail;
5163 Inst.setOpcode(ARM::VMOVv2f32);
5168 Inst.setOpcode(ARM::VMOVv1i64);
5170 Inst.setOpcode(ARM::VMOVv8i8);
5175 Inst.setOpcode(ARM::VMVNv2i32);
5177 Inst.setOpcode(ARM::VMOVv2i32);
5182 Inst.setOpcode(ARM::VMVNv2i32);
5184 Inst.setOpcode(ARM::VMOVv2i32);
5188 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
5191 if (!(imm & 0x20)) return MCDisassembler::Fail;
5193 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
5194 return MCDisassembler::Fail;
5195 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
5196 return MCDisassembler::Fail;
5197 Inst.addOperand(MCOperand::createImm(64 - imm));
5202 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
5203 uint64_t Address, const void *Decoder) {
5204 const FeatureBitset &featureBits =
5205 ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits();
5206 bool hasFullFP16 = featureBits[ARM::FeatureFullFP16];
5208 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
5209 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
5210 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
5211 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
5212 unsigned imm = fieldFromInstruction(Insn, 16, 6);
5213 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
5214 unsigned op = fieldFromInstruction(Insn, 5, 1);
5216 DecodeStatus S = MCDisassembler::Success;
5218 // If the top 3 bits of imm are clear, this is a VMOV (immediate)
5219 if (!(imm & 0x38)) {
5221 if (op == 1) return MCDisassembler::Fail;
5222 Inst.setOpcode(ARM::VMOVv4f32);
5227 Inst.setOpcode(ARM::VMOVv2i64);
5229 Inst.setOpcode(ARM::VMOVv16i8);
5234 Inst.setOpcode(ARM::VMVNv4i32);
5236 Inst.setOpcode(ARM::VMOVv4i32);
5241 Inst.setOpcode(ARM::VMVNv4i32);
5243 Inst.setOpcode(ARM::VMOVv4i32);
5247 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
5250 if (!(imm & 0x20)) return MCDisassembler::Fail;
5252 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
5253 return MCDisassembler::Fail;
5254 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
5255 return MCDisassembler::Fail;
5256 Inst.addOperand(MCOperand::createImm(64 - imm));
5261 static DecodeStatus DecodeNEONComplexLane64Instruction(MCInst &Inst,
5264 const void *Decoder) {
5265 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
5266 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
5267 unsigned Vn = (fieldFromInstruction(Insn, 16, 4) << 0);
5268 Vn |= (fieldFromInstruction(Insn, 7, 1) << 4);
5269 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
5270 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
5271 unsigned q = (fieldFromInstruction(Insn, 6, 1) << 0);
5272 unsigned rotate = (fieldFromInstruction(Insn, 20, 2) << 0);
5274 DecodeStatus S = MCDisassembler::Success;
5276 auto DestRegDecoder = q ? DecodeQPRRegisterClass : DecodeDPRRegisterClass;
5278 if (!Check(S, DestRegDecoder(Inst, Vd, Address, Decoder)))
5279 return MCDisassembler::Fail;
5280 if (!Check(S, DestRegDecoder(Inst, Vd, Address, Decoder)))
5281 return MCDisassembler::Fail;
5282 if (!Check(S, DestRegDecoder(Inst, Vn, Address, Decoder)))
5283 return MCDisassembler::Fail;
5284 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
5285 return MCDisassembler::Fail;
5286 // The lane index does not have any bits in the encoding, because it can only
5288 Inst.addOperand(MCOperand::createImm(0));
5289 Inst.addOperand(MCOperand::createImm(rotate));
5294 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
5295 uint64_t Address, const void *Decoder) {
5296 DecodeStatus S = MCDisassembler::Success;
5298 unsigned Rn = fieldFromInstruction(Val, 16, 4);
5299 unsigned Rt = fieldFromInstruction(Val, 12, 4);
5300 unsigned Rm = fieldFromInstruction(Val, 0, 4);
5301 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
5302 unsigned Cond = fieldFromInstruction(Val, 28, 4);
5304 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
5305 S = MCDisassembler::SoftFail;
5307 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5308 return MCDisassembler::Fail;
5309 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
5310 return MCDisassembler::Fail;
5311 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
5312 return MCDisassembler::Fail;
5313 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
5314 return MCDisassembler::Fail;
5315 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
5316 return MCDisassembler::Fail;
5321 static DecodeStatus DecoderForMRRC2AndMCRR2(MCInst &Inst, unsigned Val,
5322 uint64_t Address, const void *Decoder) {
5323 DecodeStatus S = MCDisassembler::Success;
5325 unsigned CRm = fieldFromInstruction(Val, 0, 4);
5326 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
5327 unsigned cop = fieldFromInstruction(Val, 8, 4);
5328 unsigned Rt = fieldFromInstruction(Val, 12, 4);
5329 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
5331 if ((cop & ~0x1) == 0xa)
5332 return MCDisassembler::Fail;
5335 S = MCDisassembler::SoftFail;
5337 // We have to check if the instruction is MRRC2
5338 // or MCRR2 when constructing the operands for
5339 // Inst. Reason is because MRRC2 stores to two
5340 // registers so it's tablegen desc has has two
5341 // outputs whereas MCRR doesn't store to any
5342 // registers so all of it's operands are listed
5343 // as inputs, therefore the operand order for
5344 // MRRC2 needs to be [Rt, Rt2, cop, opc1, CRm]
5345 // and MCRR2 operand order is [cop, opc1, Rt, Rt2, CRm]
5347 if (Inst.getOpcode() == ARM::MRRC2) {
5348 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5349 return MCDisassembler::Fail;
5350 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
5351 return MCDisassembler::Fail;
5353 Inst.addOperand(MCOperand::createImm(cop));
5354 Inst.addOperand(MCOperand::createImm(opc1));
5355 if (Inst.getOpcode() == ARM::MCRR2) {
5356 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5357 return MCDisassembler::Fail;
5358 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
5359 return MCDisassembler::Fail;
5361 Inst.addOperand(MCOperand::createImm(CRm));
5366 static DecodeStatus DecodeForVMRSandVMSR(MCInst &Inst, unsigned Val,
5368 const void *Decoder) {
5369 const FeatureBitset &featureBits =
5370 ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits();
5371 DecodeStatus S = MCDisassembler::Success;
5373 unsigned Rt = fieldFromInstruction(Val, 12, 4);
5375 if (featureBits[ARM::ModeThumb] && !featureBits[ARM::HasV8Ops]) {
5376 if (Rt == 13 || Rt == 15)
5377 S = MCDisassembler::SoftFail;
5378 Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder));
5380 Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder));
5382 if (featureBits[ARM::ModeThumb]) {
5383 Inst.addOperand(MCOperand::createImm(ARMCC::AL));
5384 Inst.addOperand(MCOperand::createReg(0));
5386 unsigned pred = fieldFromInstruction(Val, 28, 4);
5387 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
5388 return MCDisassembler::Fail;