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AArch64Disassembler.cpp
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1 //===- AArch64Disassembler.cpp - Disassembler for AArch64 -----------------===//
2 //
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
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 //
10 //===----------------------------------------------------------------------===//
11 
12 #include "AArch64Disassembler.h"
13 #include "AArch64ExternalSymbolizer.h"
14 #include "MCTargetDesc/AArch64AddressingModes.h"
15 #include "MCTargetDesc/AArch64MCTargetDesc.h"
16 #include "TargetInfo/AArch64TargetInfo.h"
17 #include "Utils/AArch64BaseInfo.h"
18 #include "llvm-c/Disassembler.h"
19 #include "llvm/MC/MCDecoderOps.h"
20 #include "llvm/MC/MCDisassembler/MCRelocationInfo.h"
21 #include "llvm/MC/MCInst.h"
22 #include "llvm/MC/MCInstrDesc.h"
23 #include "llvm/MC/MCRegisterInfo.h"
24 #include "llvm/MC/MCSubtargetInfo.h"
25 #include "llvm/MC/TargetRegistry.h"
26 #include "llvm/Support/Compiler.h"
27 #include "llvm/Support/Debug.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include <algorithm>
30 #include <memory>
31 
32 using namespace llvm;
33 
34 #define DEBUG_TYPE "aarch64-disassembler"
35 
36 // Pull DecodeStatus and its enum values into the global namespace.
37 using DecodeStatus = MCDisassembler::DecodeStatus;
38 
39 // Forward declare these because the autogenerated code will reference them.
40 // Definitions are further down.
41 static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo,
42  uint64_t Address,
43  const MCDisassembler *Decoder);
44 static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo,
45  uint64_t Address,
46  const MCDisassembler *Decoder);
47 static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo,
48  uint64_t Address,
49  const MCDisassembler *Decoder);
50 static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo,
51  uint64_t Address,
52  const MCDisassembler *Decoder);
53 static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo,
54  uint64_t Address,
55  const MCDisassembler *Decoder);
56 static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo,
57  uint64_t Address,
58  const MCDisassembler *Decoder);
59 static DecodeStatus
60 DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
61  const MCDisassembler *Decoder);
62 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo,
63  uint64_t Address,
64  const MCDisassembler *Decoder);
65 static DecodeStatus
66 DecodeGPR64x8ClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
67  const MCDisassembler *Decoder);
68 static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo,
69  uint64_t Address,
70  const MCDisassembler *Decoder);
71 static DecodeStatus
72 DecodeMatrixIndexGPR32_12_15RegisterClass(MCInst &Inst, unsigned RegNo,
73  uint64_t Address,
74  const MCDisassembler *Decoder);
75 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo,
76  uint64_t Address,
77  const MCDisassembler *Decoder);
78 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo,
79  uint64_t Address,
80  const MCDisassembler *Decoder);
81 static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo,
82  uint64_t Address,
83  const MCDisassembler *Decoder);
84 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo,
85  uint64_t Address,
86  const MCDisassembler *Decoder);
87 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo,
88  uint64_t Address,
89  const MCDisassembler *Decoder);
90 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo,
91  uint64_t Address,
92  const MCDisassembler *Decoder);
93 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo,
94  uint64_t Address,
95  const MCDisassembler *Decoder);
96 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo,
97  uint64_t Address,
98  const MCDisassembler *Decoder);
99 static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo,
100  uint64_t Address,
101  const MCDisassembler *Decoder);
102 static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo,
103  uint64_t Address,
104  const MCDisassembler *Decoder);
105 static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
106  uint64_t Address,
107  const MCDisassembler *Decoder);
108 static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo,
109  uint64_t Address,
110  const MCDisassembler *Decoder);
111 static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo,
112  uint64_t Address,
113  const MCDisassembler *Decoder);
114 static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo,
115  uint64_t Address,
116  const MCDisassembler *Decoder);
117 template <unsigned NumBitsForTile>
118 static DecodeStatus DecodeMatrixTile(MCInst &Inst, unsigned RegNo,
119  uint64_t Address,
120  const MCDisassembler *Decoder);
121 static DecodeStatus
122 DecodeMatrixTileListRegisterClass(MCInst &Inst, unsigned RegMask,
123  uint64_t Address,
124  const MCDisassembler *Decoder);
125 static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo,
126  uint64_t Address,
127  const MCDisassembler *Decoder);
128 static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
129  uint64_t Address,
130  const MCDisassembler *Decoder);
131 
132 static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm,
133  uint64_t Address,
134  const MCDisassembler *Decoder);
135 static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm,
136  uint64_t Address,
137  const MCDisassembler *Decoder);
138 static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm,
139  uint64_t Address,
140  const MCDisassembler *Decoder);
141 static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm,
142  uint64_t Address,
143  const MCDisassembler *Decoder);
144 static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm,
145  uint64_t Address,
146  const MCDisassembler *Decoder);
147 static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm,
148  uint64_t Address,
149  const MCDisassembler *Decoder);
150 static DecodeStatus
151 DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address,
152  const MCDisassembler *Decoder);
153 static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn,
154  uint64_t Address,
155  const MCDisassembler *Decoder);
156 static DecodeStatus
157 DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address,
158  const MCDisassembler *Decoder);
159 static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn,
160  uint64_t Address,
161  const MCDisassembler *Decoder);
162 static DecodeStatus
163 DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address,
164  const MCDisassembler *Decoder);
165 static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn,
166  uint64_t Address,
167  const MCDisassembler *Decoder);
168 static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn,
169  uint64_t Address,
170  const MCDisassembler *Decoder);
171 static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn,
172  uint64_t Address,
173  const MCDisassembler *Decoder);
174 static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn,
175  uint64_t Address,
176  const MCDisassembler *Decoder);
177 static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn,
178  uint64_t Address,
179  const MCDisassembler *Decoder);
180 static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn,
181  uint64_t Address,
182  const MCDisassembler *Decoder);
183 static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn,
184  uint64_t Address,
185  const MCDisassembler *Decoder);
186 static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn,
187  uint64_t Address,
188  const MCDisassembler *Decoder);
189 static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn,
190  uint64_t Address,
191  const MCDisassembler *Decoder);
192 static DecodeStatus
193 DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn, uint64_t Address,
194  const MCDisassembler *Decoder);
195 static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn,
196  uint64_t Address,
197  const MCDisassembler *Decoder);
198 
199 static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn,
200  uint64_t Address,
201  const MCDisassembler *Decoder);
202 static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm,
203  uint64_t Addr,
204  const MCDisassembler *Decoder);
205 static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm,
206  uint64_t Addr,
207  const MCDisassembler *Decoder);
208 static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm,
209  uint64_t Addr,
210  const MCDisassembler *Decoder);
211 static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm,
212  uint64_t Addr,
213  const MCDisassembler *Decoder);
214 static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm,
215  uint64_t Addr,
216  const MCDisassembler *Decoder);
217 static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm,
218  uint64_t Addr,
219  const MCDisassembler *Decoder);
220 static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm,
221  uint64_t Addr,
222  const MCDisassembler *Decoder);
223 static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm,
224  uint64_t Addr,
225  const MCDisassembler *Decoder);
226 static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm,
227  uint64_t Addr,
228  const MCDisassembler *Decoder);
229 static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm,
230  uint64_t Addr,
231  const MCDisassembler *Decoder);
232 static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm,
233  uint64_t Addr,
234  const MCDisassembler *Decoder);
235 static DecodeStatus
236 DecodeWSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
237  const MCDisassembler *Decoder);
238 static DecodeStatus
239 DecodeXSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
240  const MCDisassembler *Decoder);
241 static DecodeStatus
242 DecodeSVELogicalImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address,
243  const MCDisassembler *Decoder);
244 template <int Bits>
245 static DecodeStatus DecodeSImm(MCInst &Inst, uint64_t Imm, uint64_t Address,
246  const MCDisassembler *Decoder);
247 template <int ElementWidth>
248 static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm, uint64_t Addr,
249  const MCDisassembler *Decoder);
250 static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm,
251  uint64_t Addr,
252  const MCDisassembler *Decoder);
253 static DecodeStatus DecodeSVCROp(MCInst &Inst, unsigned Imm, uint64_t Address,
254  const MCDisassembler *Decoder);
255 static DecodeStatus DecodeCPYMemOpInstruction(MCInst &Inst, uint32_t insn,
256  uint64_t Addr,
257  const MCDisassembler *Decoder);
258 static DecodeStatus DecodeSETMemOpInstruction(MCInst &Inst, uint32_t insn,
259  uint64_t Addr,
260  const MCDisassembler *Decoder);
261 
262 static bool Check(DecodeStatus &Out, DecodeStatus In) {
263  switch (In) {
264  case MCDisassembler::Success:
265  // Out stays the same.
266  return true;
267  case MCDisassembler::SoftFail:
268  Out = In;
269  return true;
270  case MCDisassembler::Fail:
271  Out = In;
272  return false;
273  }
274  llvm_unreachable("Invalid DecodeStatus!");
275 }
276 
277 #include "AArch64GenDisassemblerTables.inc"
278 #include "AArch64GenInstrInfo.inc"
279 
280 #define Success MCDisassembler::Success
281 #define Fail MCDisassembler::Fail
282 #define SoftFail MCDisassembler::SoftFail
283 
284 static MCDisassembler *createAArch64Disassembler(const Target &T,
285  const MCSubtargetInfo &STI,
286  MCContext &Ctx) {
287 
288  return new AArch64Disassembler(STI, Ctx, T.createMCInstrInfo());
289 }
290 
291 DecodeStatus AArch64Disassembler::getInstruction(MCInst &MI, uint64_t &Size,
292  ArrayRef<uint8_t> Bytes,
293  uint64_t Address,
294  raw_ostream &CS) const {
295  CommentStream = &CS;
296 
297  Size = 0;
298  // We want to read exactly 4 bytes of data.
299  if (Bytes.size() < 4)
300  return Fail;
301  Size = 4;
302 
303  // Encoded as a small-endian 32-bit word in the stream.
304  uint32_t Insn =
305  (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
306 
307  const uint8_t *Tables[] = {DecoderTable32, DecoderTableFallback32};
308 
309  for (auto Table : Tables) {
310  DecodeStatus Result =
311  decodeInstruction(Table, MI, Insn, Address, this, STI);
312 
313  const MCInstrDesc &Desc = MCII->get(MI.getOpcode());
314 
315  // For Scalable Matrix Extension (SME) instructions that have an implicit
316  // operand for the accumulator (ZA) or implicit immediate zero which isn't
317  // encoded, manually insert operand.
318  for (unsigned i = 0; i < Desc.getNumOperands(); i++) {
319  if (Desc.OpInfo[i].OperandType == MCOI::OPERAND_REGISTER) {
320  switch (Desc.OpInfo[i].RegClass) {
321  default:
322  break;
323  case AArch64::MPRRegClassID:
324  MI.insert(MI.begin() + i, MCOperand::createReg(AArch64::ZA));
325  break;
326  case AArch64::MPR8RegClassID:
327  MI.insert(MI.begin() + i, MCOperand::createReg(AArch64::ZAB0));
328  break;
329  }
330  } else if (Desc.OpInfo[i].OperandType ==
331  AArch64::OPERAND_IMPLICIT_IMM_0) {
332  MI.insert(MI.begin() + i, MCOperand::createImm(0));
333  }
334  }
335 
336  if (MI.getOpcode() == AArch64::LDR_ZA ||
337  MI.getOpcode() == AArch64::STR_ZA) {
338  // Spill and fill instructions have a single immediate used for both
339  // the vector select offset and optional memory offset. Replicate
340  // the decoded immediate.
341  const MCOperand &Imm4Op = MI.getOperand(2);
342  assert(Imm4Op.isImm() && "Unexpected operand type!");
343  MI.addOperand(Imm4Op);
344  }
345 
346  if (Result != MCDisassembler::Fail)
347  return Result;
348  }
349 
350  return MCDisassembler::Fail;
351 }
352 
353 static MCSymbolizer *
354 createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo,
355  LLVMSymbolLookupCallback SymbolLookUp,
356  void *DisInfo, MCContext *Ctx,
357  std::unique_ptr<MCRelocationInfo> &&RelInfo) {
358  return new AArch64ExternalSymbolizer(*Ctx, std::move(RelInfo), GetOpInfo,
359  SymbolLookUp, DisInfo);
360 }
361 
362 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64Disassembler() {
363  TargetRegistry::RegisterMCDisassembler(getTheAArch64leTarget(),
364  createAArch64Disassembler);
365  TargetRegistry::RegisterMCDisassembler(getTheAArch64beTarget(),
366  createAArch64Disassembler);
367  TargetRegistry::RegisterMCSymbolizer(getTheAArch64leTarget(),
368  createAArch64ExternalSymbolizer);
369  TargetRegistry::RegisterMCSymbolizer(getTheAArch64beTarget(),
370  createAArch64ExternalSymbolizer);
371  TargetRegistry::RegisterMCDisassembler(getTheAArch64_32Target(),
372  createAArch64Disassembler);
373  TargetRegistry::RegisterMCSymbolizer(getTheAArch64_32Target(),
374  createAArch64ExternalSymbolizer);
375 
376  TargetRegistry::RegisterMCDisassembler(getTheARM64Target(),
377  createAArch64Disassembler);
378  TargetRegistry::RegisterMCSymbolizer(getTheARM64Target(),
379  createAArch64ExternalSymbolizer);
380  TargetRegistry::RegisterMCDisassembler(getTheARM64_32Target(),
381  createAArch64Disassembler);
382  TargetRegistry::RegisterMCSymbolizer(getTheARM64_32Target(),
383  createAArch64ExternalSymbolizer);
384 }
385 
386 static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo,
387  uint64_t Addr,
388  const MCDisassembler *Decoder) {
389  if (RegNo > 31)
390  return Fail;
391 
392  unsigned Register =
393  AArch64MCRegisterClasses[AArch64::FPR128RegClassID].getRegister(RegNo);
394  Inst.addOperand(MCOperand::createReg(Register));
395  return Success;
396 }
397 
398 static DecodeStatus
399 DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
400  const MCDisassembler *Decoder) {
401  if (RegNo > 15)
402  return Fail;
403  return DecodeFPR128RegisterClass(Inst, RegNo, Addr, Decoder);
404 }
405 
406 static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo,
407  uint64_t Addr,
408  const MCDisassembler *Decoder) {
409  if (RegNo > 31)
410  return Fail;
411 
412  unsigned Register =
413  AArch64MCRegisterClasses[AArch64::FPR64RegClassID].getRegister(RegNo);
414  Inst.addOperand(MCOperand::createReg(Register));
415  return Success;
416 }
417 
418 static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo,
419  uint64_t Addr,
420  const MCDisassembler *Decoder) {
421  if (RegNo > 31)
422  return Fail;
423 
424  unsigned Register =
425  AArch64MCRegisterClasses[AArch64::FPR32RegClassID].getRegister(RegNo);
426  Inst.addOperand(MCOperand::createReg(Register));
427  return Success;
428 }
429 
430 static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo,
431  uint64_t Addr,
432  const MCDisassembler *Decoder) {
433  if (RegNo > 31)
434  return Fail;
435 
436  unsigned Register =
437  AArch64MCRegisterClasses[AArch64::FPR16RegClassID].getRegister(RegNo);
438  Inst.addOperand(MCOperand::createReg(Register));
439  return Success;
440 }
441 
442 static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo,
443  uint64_t Addr,
444  const MCDisassembler *Decoder) {
445  if (RegNo > 31)
446  return Fail;
447 
448  unsigned Register =
449  AArch64MCRegisterClasses[AArch64::FPR8RegClassID].getRegister(RegNo);
450  Inst.addOperand(MCOperand::createReg(Register));
451  return Success;
452 }
453 
454 static DecodeStatus
455 DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
456  const MCDisassembler *Decoder) {
457  if (RegNo > 30)
458  return Fail;
459 
460  unsigned Register =
461  AArch64MCRegisterClasses[AArch64::GPR64commonRegClassID].getRegister(
462  RegNo);
463  Inst.addOperand(MCOperand::createReg(Register));
464  return Success;
465 }
466 
467 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo,
468  uint64_t Addr,
469  const MCDisassembler *Decoder) {
470  if (RegNo > 31)
471  return Fail;
472 
473  unsigned Register =
474  AArch64MCRegisterClasses[AArch64::GPR64RegClassID].getRegister(RegNo);
475  Inst.addOperand(MCOperand::createReg(Register));
476  return Success;
477 }
478 
479 static DecodeStatus
480 DecodeGPR64x8ClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
481  const MCDisassembler *Decoder) {
482  if (RegNo > 22)
483  return Fail;
484  if (RegNo & 1)
485  return Fail;
486 
487  unsigned Register =
488  AArch64MCRegisterClasses[AArch64::GPR64x8ClassRegClassID].getRegister(
489  RegNo >> 1);
490  Inst.addOperand(MCOperand::createReg(Register));
491  return Success;
492 }
493 
494 static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo,
495  uint64_t Addr,
496  const MCDisassembler *Decoder) {
497  if (RegNo > 31)
498  return Fail;
499  unsigned Register =
500  AArch64MCRegisterClasses[AArch64::GPR64spRegClassID].getRegister(RegNo);
501  Inst.addOperand(MCOperand::createReg(Register));
502  return Success;
503 }
504 
505 static DecodeStatus
506 DecodeMatrixIndexGPR32_12_15RegisterClass(MCInst &Inst, unsigned RegNo,
507  uint64_t Addr,
508  const MCDisassembler *Decoder) {
509  if (RegNo > 3)
510  return Fail;
511 
512  unsigned Register =
513  AArch64MCRegisterClasses[AArch64::MatrixIndexGPR32_12_15RegClassID]
514  .getRegister(RegNo);
515  Inst.addOperand(MCOperand::createReg(Register));
516  return Success;
517 }
518 
519 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo,
520  uint64_t Addr,
521  const MCDisassembler *Decoder) {
522  if (RegNo > 31)
523  return Fail;
524 
525  unsigned Register =
526  AArch64MCRegisterClasses[AArch64::GPR32RegClassID].getRegister(RegNo);
527  Inst.addOperand(MCOperand::createReg(Register));
528  return Success;
529 }
530 
531 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo,
532  uint64_t Addr,
533  const MCDisassembler *Decoder) {
534  if (RegNo > 31)
535  return Fail;
536 
537  unsigned Register =
538  AArch64MCRegisterClasses[AArch64::GPR32spRegClassID].getRegister(RegNo);
539  Inst.addOperand(MCOperand::createReg(Register));
540  return Success;
541 }
542 
543 static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo,
544  uint64_t Address,
545  const MCDisassembler *Decoder) {
546  if (RegNo > 31)
547  return Fail;
548 
549  unsigned Register =
550  AArch64MCRegisterClasses[AArch64::ZPRRegClassID].getRegister(RegNo);
551  Inst.addOperand(MCOperand::createReg(Register));
552  return Success;
553 }
554 
555 static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo,
556  uint64_t Address,
557  const MCDisassembler *Decoder) {
558  if (RegNo > 15)
559  return Fail;
560  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
561 }
562 
563 static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
564  uint64_t Address,
565  const MCDisassembler *Decoder) {
566  if (RegNo > 7)
567  return Fail;
568  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
569 }
570 
571 static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo,
572  uint64_t Address,
573  const MCDisassembler *Decoder) {
574  if (RegNo > 31)
575  return Fail;
576  unsigned Register =
577  AArch64MCRegisterClasses[AArch64::ZPR2RegClassID].getRegister(RegNo);
578  Inst.addOperand(MCOperand::createReg(Register));
579  return Success;
580 }
581 
582 static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo,
583  uint64_t Address,
584  const MCDisassembler *Decoder) {
585  if (RegNo > 31)
586  return Fail;
587  unsigned Register =
588  AArch64MCRegisterClasses[AArch64::ZPR3RegClassID].getRegister(RegNo);
589  Inst.addOperand(MCOperand::createReg(Register));
590  return Success;
591 }
592 
593 static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo,
594  uint64_t Address,
595  const MCDisassembler *Decoder) {
596  if (RegNo > 31)
597  return Fail;
598  unsigned Register =
599  AArch64MCRegisterClasses[AArch64::ZPR4RegClassID].getRegister(RegNo);
600  Inst.addOperand(MCOperand::createReg(Register));
601  return Success;
602 }
603 
604 static DecodeStatus
605 DecodeMatrixTileListRegisterClass(MCInst &Inst, unsigned RegMask,
606  uint64_t Address,
607  const MCDisassembler *Decoder) {
608  if (RegMask > 0xFF)
609  return Fail;
610  Inst.addOperand(MCOperand::createImm(RegMask));
611  return Success;
612 }
613 
614 static const SmallVector<SmallVector<unsigned, 16>, 5>
615  MatrixZATileDecoderTable = {
616  {AArch64::ZAB0},
617  {AArch64::ZAH0, AArch64::ZAH1},
618  {AArch64::ZAS0, AArch64::ZAS1, AArch64::ZAS2, AArch64::ZAS3},
619  {AArch64::ZAD0, AArch64::ZAD1, AArch64::ZAD2, AArch64::ZAD3,
620  AArch64::ZAD4, AArch64::ZAD5, AArch64::ZAD6, AArch64::ZAD7},
621  {AArch64::ZAQ0, AArch64::ZAQ1, AArch64::ZAQ2, AArch64::ZAQ3,
622  AArch64::ZAQ4, AArch64::ZAQ5, AArch64::ZAQ6, AArch64::ZAQ7,
623  AArch64::ZAQ8, AArch64::ZAQ9, AArch64::ZAQ10, AArch64::ZAQ11,
624  AArch64::ZAQ12, AArch64::ZAQ13, AArch64::ZAQ14, AArch64::ZAQ15}};
625 
626 template <unsigned NumBitsForTile>
627 static DecodeStatus DecodeMatrixTile(MCInst &Inst, unsigned RegNo,
628  uint64_t Address,
629  const MCDisassembler *Decoder) {
630  unsigned LastReg = (1 << NumBitsForTile) - 1;
631  if (RegNo > LastReg)
632  return Fail;
633  Inst.addOperand(
634  MCOperand::createReg(MatrixZATileDecoderTable[NumBitsForTile][RegNo]));
635  return Success;
636 }
637 
638 static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo,
639  uint64_t Addr,
640  const MCDisassembler *Decoder) {
641  if (RegNo > 15)
642  return Fail;
643 
644  unsigned Register =
645  AArch64MCRegisterClasses[AArch64::PPRRegClassID].getRegister(RegNo);
646  Inst.addOperand(MCOperand::createReg(Register));
647  return Success;
648 }
649 
650 static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
651  uint64_t Addr,
652  const MCDisassembler *Decoder) {
653  if (RegNo > 7)
654  return Fail;
655 
656  // Just reuse the PPR decode table
657  return DecodePPRRegisterClass(Inst, RegNo, Addr, Decoder);
658 }
659 
660 static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo,
661  uint64_t Addr,
662  const MCDisassembler *Decoder) {
663  if (RegNo > 31)
664  return Fail;
665  unsigned Register =
666  AArch64MCRegisterClasses[AArch64::QQRegClassID].getRegister(RegNo);
667  Inst.addOperand(MCOperand::createReg(Register));
668  return Success;
669 }
670 
671 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo,
672  uint64_t Addr,
673  const MCDisassembler *Decoder) {
674  if (RegNo > 31)
675  return Fail;
676  unsigned Register =
677  AArch64MCRegisterClasses[AArch64::QQQRegClassID].getRegister(RegNo);
678  Inst.addOperand(MCOperand::createReg(Register));
679  return Success;
680 }
681 
682 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo,
683  uint64_t Addr,
684  const MCDisassembler *Decoder) {
685  if (RegNo > 31)
686  return Fail;
687  unsigned Register =
688  AArch64MCRegisterClasses[AArch64::QQQQRegClassID].getRegister(RegNo);
689  Inst.addOperand(MCOperand::createReg(Register));
690  return Success;
691 }
692 
693 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo,
694  uint64_t Addr,
695  const MCDisassembler *Decoder) {
696  if (RegNo > 31)
697  return Fail;
698  unsigned Register =
699  AArch64MCRegisterClasses[AArch64::DDRegClassID].getRegister(RegNo);
700  Inst.addOperand(MCOperand::createReg(Register));
701  return Success;
702 }
703 
704 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo,
705  uint64_t Addr,
706  const MCDisassembler *Decoder) {
707  if (RegNo > 31)
708  return Fail;
709  unsigned Register =
710  AArch64MCRegisterClasses[AArch64::DDDRegClassID].getRegister(RegNo);
711  Inst.addOperand(MCOperand::createReg(Register));
712  return Success;
713 }
714 
715 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo,
716  uint64_t Addr,
717  const MCDisassembler *Decoder) {
718  if (RegNo > 31)
719  return Fail;
720  unsigned Register =
721  AArch64MCRegisterClasses[AArch64::DDDDRegClassID].getRegister(RegNo);
722  Inst.addOperand(MCOperand::createReg(Register));
723  return Success;
724 }
725 
726 static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm,
727  uint64_t Addr,
728  const MCDisassembler *Decoder) {
729  // scale{5} is asserted as 1 in tblgen.
730  Imm |= 0x20;
731  Inst.addOperand(MCOperand::createImm(64 - Imm));
732  return Success;
733 }
734 
735 static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm,
736  uint64_t Addr,
737  const MCDisassembler *Decoder) {
738  Inst.addOperand(MCOperand::createImm(64 - Imm));
739  return Success;
740 }
741 
742 static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm,
743  uint64_t Addr,
744  const MCDisassembler *Decoder) {
745  int64_t ImmVal = Imm;
746 
747  // Sign-extend 19-bit immediate.
748  if (ImmVal & (1 << (19 - 1)))
749  ImmVal |= ~((1LL << 19) - 1);
750 
751  if (!Decoder->tryAddingSymbolicOperand(
752  Inst, ImmVal * 4, Addr, Inst.getOpcode() != AArch64::LDRXl, 0, 0, 4))
753  Inst.addOperand(MCOperand::createImm(ImmVal));
754  return Success;
755 }
756 
757 static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm,
758  uint64_t Address,
759  const MCDisassembler *Decoder) {
760  Inst.addOperand(MCOperand::createImm((Imm >> 1) & 1));
761  Inst.addOperand(MCOperand::createImm(Imm & 1));
762  return Success;
763 }
764 
765 static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm,
766  uint64_t Address,
767  const MCDisassembler *Decoder) {
768  Inst.addOperand(MCOperand::createImm(Imm));
769 
770  // Every system register in the encoding space is valid with the syntax
771  // S<op0>_<op1>_<Cn>_<Cm>_<op2>, so decoding system registers always succeeds.
772  return Success;
773 }
774 
775 static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm,
776  uint64_t Address,
777  const MCDisassembler *Decoder) {
778  Inst.addOperand(MCOperand::createImm(Imm));
779 
780  return Success;
781 }
782 
783 static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn,
784  uint64_t Address,
785  const MCDisassembler *Decoder) {
786  // This decoder exists to add the dummy Lane operand to the MCInst, which must
787  // be 1 in assembly but has no other real manifestation.
788  unsigned Rd = fieldFromInstruction(Insn, 0, 5);
789  unsigned Rn = fieldFromInstruction(Insn, 5, 5);
790  unsigned IsToVec = fieldFromInstruction(Insn, 16, 1);
791 
792  if (IsToVec) {
793  DecodeFPR128RegisterClass(Inst, Rd, Address, Decoder);
794  DecodeGPR64RegisterClass(Inst, Rn, Address, Decoder);
795  } else {
796  DecodeGPR64RegisterClass(Inst, Rd, Address, Decoder);
797  DecodeFPR128RegisterClass(Inst, Rn, Address, Decoder);
798  }
799 
800  // Add the lane
801  Inst.addOperand(MCOperand::createImm(1));
802 
803  return Success;
804 }
805 
806 static DecodeStatus DecodeVecShiftRImm(MCInst &Inst, unsigned Imm,
807  unsigned Add) {
808  Inst.addOperand(MCOperand::createImm(Add - Imm));
809  return Success;
810 }
811 
812 static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm,
813  unsigned Add) {
814  Inst.addOperand(MCOperand::createImm((Imm + Add) & (Add - 1)));
815  return Success;
816 }
817 
818 static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm,
819  uint64_t Addr,
820  const MCDisassembler *Decoder) {
821  return DecodeVecShiftRImm(Inst, Imm, 64);
822 }
823 
824 static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm,
825  uint64_t Addr,
826  const MCDisassembler *Decoder) {
827  return DecodeVecShiftRImm(Inst, Imm | 0x20, 64);
828 }
829 
830 static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm,
831  uint64_t Addr,
832  const MCDisassembler *Decoder) {
833  return DecodeVecShiftRImm(Inst, Imm, 32);
834 }
835 
836 static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm,
837  uint64_t Addr,
838  const MCDisassembler *Decoder) {
839  return DecodeVecShiftRImm(Inst, Imm | 0x10, 32);
840 }
841 
842 static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm,
843  uint64_t Addr,
844  const MCDisassembler *Decoder) {
845  return DecodeVecShiftRImm(Inst, Imm, 16);
846 }
847 
848 static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm,
849  uint64_t Addr,
850  const MCDisassembler *Decoder) {
851  return DecodeVecShiftRImm(Inst, Imm | 0x8, 16);
852 }
853 
854 static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm,
855  uint64_t Addr,
856  const MCDisassembler *Decoder) {
857  return DecodeVecShiftRImm(Inst, Imm, 8);
858 }
859 
860 static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm,
861  uint64_t Addr,
862  const MCDisassembler *Decoder) {
863  return DecodeVecShiftLImm(Inst, Imm, 64);
864 }
865 
866 static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm,
867  uint64_t Addr,
868  const MCDisassembler *Decoder) {
869  return DecodeVecShiftLImm(Inst, Imm, 32);
870 }
871 
872 static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm,
873  uint64_t Addr,
874  const MCDisassembler *Decoder) {
875  return DecodeVecShiftLImm(Inst, Imm, 16);
876 }
877 
878 static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm,
879  uint64_t Addr,
880  const MCDisassembler *Decoder) {
881  return DecodeVecShiftLImm(Inst, Imm, 8);
882 }
883 
884 static DecodeStatus
885 DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
886  const MCDisassembler *Decoder) {
887  unsigned Rd = fieldFromInstruction(insn, 0, 5);
888  unsigned Rn = fieldFromInstruction(insn, 5, 5);
889  unsigned Rm = fieldFromInstruction(insn, 16, 5);
890  unsigned shiftHi = fieldFromInstruction(insn, 22, 2);
891  unsigned shiftLo = fieldFromInstruction(insn, 10, 6);
892  unsigned shift = (shiftHi << 6) | shiftLo;
893  switch (Inst.getOpcode()) {
894  default:
895  return Fail;
896  case AArch64::ADDWrs:
897  case AArch64::ADDSWrs:
898  case AArch64::SUBWrs:
899  case AArch64::SUBSWrs:
900  // if shift == '11' then ReservedValue()
901  if (shiftHi == 0x3)
902  return Fail;
903  LLVM_FALLTHROUGH;
904  case AArch64::ANDWrs:
905  case AArch64::ANDSWrs:
906  case AArch64::BICWrs:
907  case AArch64::BICSWrs:
908  case AArch64::ORRWrs:
909  case AArch64::ORNWrs:
910  case AArch64::EORWrs:
911  case AArch64::EONWrs: {
912  // if sf == '0' and imm6<5> == '1' then ReservedValue()
913  if (shiftLo >> 5 == 1)
914  return Fail;
915  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
916  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
917  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
918  break;
919  }
920  case AArch64::ADDXrs:
921  case AArch64::ADDSXrs:
922  case AArch64::SUBXrs:
923  case AArch64::SUBSXrs:
924  // if shift == '11' then ReservedValue()
925  if (shiftHi == 0x3)
926  return Fail;
927  LLVM_FALLTHROUGH;
928  case AArch64::ANDXrs:
929  case AArch64::ANDSXrs:
930  case AArch64::BICXrs:
931  case AArch64::BICSXrs:
932  case AArch64::ORRXrs:
933  case AArch64::ORNXrs:
934  case AArch64::EORXrs:
935  case AArch64::EONXrs:
936  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
937  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
938  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
939  break;
940  }
941 
942  Inst.addOperand(MCOperand::createImm(shift));
943  return Success;
944 }
945 
946 static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn,
947  uint64_t Addr,
948  const MCDisassembler *Decoder) {
949  unsigned Rd = fieldFromInstruction(insn, 0, 5);
950  unsigned imm = fieldFromInstruction(insn, 5, 16);
951  unsigned shift = fieldFromInstruction(insn, 21, 2);
952  shift <<= 4;
953  switch (Inst.getOpcode()) {
954  default:
955  return Fail;
956  case AArch64::MOVZWi:
957  case AArch64::MOVNWi:
958  case AArch64::MOVKWi:
959  if (shift & (1U << 5))
960  return Fail;
961  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
962  break;
963  case AArch64::MOVZXi:
964  case AArch64::MOVNXi:
965  case AArch64::MOVKXi:
966  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
967  break;
968  }
969 
970  if (Inst.getOpcode() == AArch64::MOVKWi ||
971  Inst.getOpcode() == AArch64::MOVKXi)
972  Inst.addOperand(Inst.getOperand(0));
973 
974  Inst.addOperand(MCOperand::createImm(imm));
975  Inst.addOperand(MCOperand::createImm(shift));
976  return Success;
977 }
978 
979 static DecodeStatus
980 DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
981  const MCDisassembler *Decoder) {
982  unsigned Rt = fieldFromInstruction(insn, 0, 5);
983  unsigned Rn = fieldFromInstruction(insn, 5, 5);
984  unsigned offset = fieldFromInstruction(insn, 10, 12);
985 
986  switch (Inst.getOpcode()) {
987  default:
988  return Fail;
989  case AArch64::PRFMui:
990  // Rt is an immediate in prefetch.
991  Inst.addOperand(MCOperand::createImm(Rt));
992  break;
993  case AArch64::STRBBui:
994  case AArch64::LDRBBui:
995  case AArch64::LDRSBWui:
996  case AArch64::STRHHui:
997  case AArch64::LDRHHui:
998  case AArch64::LDRSHWui:
999  case AArch64::STRWui:
1000  case AArch64::LDRWui:
1001  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1002  break;
1003  case AArch64::LDRSBXui:
1004  case AArch64::LDRSHXui:
1005  case AArch64::LDRSWui:
1006  case AArch64::STRXui:
1007  case AArch64::LDRXui:
1008  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1009  break;
1010  case AArch64::LDRQui:
1011  case AArch64::STRQui:
1012  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1013  break;
1014  case AArch64::LDRDui:
1015  case AArch64::STRDui:
1016  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1017  break;
1018  case AArch64::LDRSui:
1019  case AArch64::STRSui:
1020  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1021  break;
1022  case AArch64::LDRHui:
1023  case AArch64::STRHui:
1024  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1025  break;
1026  case AArch64::LDRBui:
1027  case AArch64::STRBui:
1028  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1029  break;
1030  }
1031 
1032  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1033  if (!Decoder->tryAddingSymbolicOperand(Inst, offset, Addr, Fail, 0, 0, 4))
1034  Inst.addOperand(MCOperand::createImm(offset));
1035  return Success;
1036 }
1037 
1038 static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn,
1039  uint64_t Addr,
1040  const MCDisassembler *Decoder) {
1041  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1042  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1043  int64_t offset = fieldFromInstruction(insn, 12, 9);
1044 
1045  // offset is a 9-bit signed immediate, so sign extend it to
1046  // fill the unsigned.
1047  if (offset & (1 << (9 - 1)))
1048  offset |= ~((1LL << 9) - 1);
1049 
1050  // First operand is always the writeback to the address register, if needed.
1051  switch (Inst.getOpcode()) {
1052  default:
1053  break;
1054  case AArch64::LDRSBWpre:
1055  case AArch64::LDRSHWpre:
1056  case AArch64::STRBBpre:
1057  case AArch64::LDRBBpre:
1058  case AArch64::STRHHpre:
1059  case AArch64::LDRHHpre:
1060  case AArch64::STRWpre:
1061  case AArch64::LDRWpre:
1062  case AArch64::LDRSBWpost:
1063  case AArch64::LDRSHWpost:
1064  case AArch64::STRBBpost:
1065  case AArch64::LDRBBpost:
1066  case AArch64::STRHHpost:
1067  case AArch64::LDRHHpost:
1068  case AArch64::STRWpost:
1069  case AArch64::LDRWpost:
1070  case AArch64::LDRSBXpre:
1071  case AArch64::LDRSHXpre:
1072  case AArch64::STRXpre:
1073  case AArch64::LDRSWpre:
1074  case AArch64::LDRXpre:
1075  case AArch64::LDRSBXpost:
1076  case AArch64::LDRSHXpost:
1077  case AArch64::STRXpost:
1078  case AArch64::LDRSWpost:
1079  case AArch64::LDRXpost:
1080  case AArch64::LDRQpre:
1081  case AArch64::STRQpre:
1082  case AArch64::LDRQpost:
1083  case AArch64::STRQpost:
1084  case AArch64::LDRDpre:
1085  case AArch64::STRDpre:
1086  case AArch64::LDRDpost:
1087  case AArch64::STRDpost:
1088  case AArch64::LDRSpre:
1089  case AArch64::STRSpre:
1090  case AArch64::LDRSpost:
1091  case AArch64::STRSpost:
1092  case AArch64::LDRHpre:
1093  case AArch64::STRHpre:
1094  case AArch64::LDRHpost:
1095  case AArch64::STRHpost:
1096  case AArch64::LDRBpre:
1097  case AArch64::STRBpre:
1098  case AArch64::LDRBpost:
1099  case AArch64::STRBpost:
1100  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1101  break;
1102  }
1103 
1104  switch (Inst.getOpcode()) {
1105  default:
1106  return Fail;
1107  case AArch64::PRFUMi:
1108  // Rt is an immediate in prefetch.
1109  Inst.addOperand(MCOperand::createImm(Rt));
1110  break;
1111  case AArch64::STURBBi:
1112  case AArch64::LDURBBi:
1113  case AArch64::LDURSBWi:
1114  case AArch64::STURHHi:
1115  case AArch64::LDURHHi:
1116  case AArch64::LDURSHWi:
1117  case AArch64::STURWi:
1118  case AArch64::LDURWi:
1119  case AArch64::LDTRSBWi:
1120  case AArch64::LDTRSHWi:
1121  case AArch64::STTRWi:
1122  case AArch64::LDTRWi:
1123  case AArch64::STTRHi:
1124  case AArch64::LDTRHi:
1125  case AArch64::LDTRBi:
1126  case AArch64::STTRBi:
1127  case AArch64::LDRSBWpre:
1128  case AArch64::LDRSHWpre:
1129  case AArch64::STRBBpre:
1130  case AArch64::LDRBBpre:
1131  case AArch64::STRHHpre:
1132  case AArch64::LDRHHpre:
1133  case AArch64::STRWpre:
1134  case AArch64::LDRWpre:
1135  case AArch64::LDRSBWpost:
1136  case AArch64::LDRSHWpost:
1137  case AArch64::STRBBpost:
1138  case AArch64::LDRBBpost:
1139  case AArch64::STRHHpost:
1140  case AArch64::LDRHHpost:
1141  case AArch64::STRWpost:
1142  case AArch64::LDRWpost:
1143  case AArch64::STLURBi:
1144  case AArch64::STLURHi:
1145  case AArch64::STLURWi:
1146  case AArch64::LDAPURBi:
1147  case AArch64::LDAPURSBWi:
1148  case AArch64::LDAPURHi:
1149  case AArch64::LDAPURSHWi:
1150  case AArch64::LDAPURi:
1151  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1152  break;
1153  case AArch64::LDURSBXi:
1154  case AArch64::LDURSHXi:
1155  case AArch64::LDURSWi:
1156  case AArch64::STURXi:
1157  case AArch64::LDURXi:
1158  case AArch64::LDTRSBXi:
1159  case AArch64::LDTRSHXi:
1160  case AArch64::LDTRSWi:
1161  case AArch64::STTRXi:
1162  case AArch64::LDTRXi:
1163  case AArch64::LDRSBXpre:
1164  case AArch64::LDRSHXpre:
1165  case AArch64::STRXpre:
1166  case AArch64::LDRSWpre:
1167  case AArch64::LDRXpre:
1168  case AArch64::LDRSBXpost:
1169  case AArch64::LDRSHXpost:
1170  case AArch64::STRXpost:
1171  case AArch64::LDRSWpost:
1172  case AArch64::LDRXpost:
1173  case AArch64::LDAPURSWi:
1174  case AArch64::LDAPURSHXi:
1175  case AArch64::LDAPURSBXi:
1176  case AArch64::STLURXi:
1177  case AArch64::LDAPURXi:
1178  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1179  break;
1180  case AArch64::LDURQi:
1181  case AArch64::STURQi:
1182  case AArch64::LDRQpre:
1183  case AArch64::STRQpre:
1184  case AArch64::LDRQpost:
1185  case AArch64::STRQpost:
1186  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1187  break;
1188  case AArch64::LDURDi:
1189  case AArch64::STURDi:
1190  case AArch64::LDRDpre:
1191  case AArch64::STRDpre:
1192  case AArch64::LDRDpost:
1193  case AArch64::STRDpost:
1194  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1195  break;
1196  case AArch64::LDURSi:
1197  case AArch64::STURSi:
1198  case AArch64::LDRSpre:
1199  case AArch64::STRSpre:
1200  case AArch64::LDRSpost:
1201  case AArch64::STRSpost:
1202  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1203  break;
1204  case AArch64::LDURHi:
1205  case AArch64::STURHi:
1206  case AArch64::LDRHpre:
1207  case AArch64::STRHpre:
1208  case AArch64::LDRHpost:
1209  case AArch64::STRHpost:
1210  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1211  break;
1212  case AArch64::LDURBi:
1213  case AArch64::STURBi:
1214  case AArch64::LDRBpre:
1215  case AArch64::STRBpre:
1216  case AArch64::LDRBpost:
1217  case AArch64::STRBpost:
1218  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1219  break;
1220  }
1221 
1222  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1223  Inst.addOperand(MCOperand::createImm(offset));
1224 
1225  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1226  bool IsIndexed = fieldFromInstruction(insn, 10, 2) != 0;
1227  bool IsFP = fieldFromInstruction(insn, 26, 1);
1228 
1229  // Cannot write back to a transfer register (but xzr != sp).
1230  if (IsLoad && IsIndexed && !IsFP && Rn != 31 && Rt == Rn)
1231  return SoftFail;
1232 
1233  return Success;
1234 }
1235 
1236 static DecodeStatus
1237 DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
1238  const MCDisassembler *Decoder) {
1239  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1240  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1241  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1242  unsigned Rs = fieldFromInstruction(insn, 16, 5);
1243 
1244  unsigned Opcode = Inst.getOpcode();
1245  switch (Opcode) {
1246  default:
1247  return Fail;
1248  case AArch64::STLXRW:
1249  case AArch64::STLXRB:
1250  case AArch64::STLXRH:
1251  case AArch64::STXRW:
1252  case AArch64::STXRB:
1253  case AArch64::STXRH:
1254  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1255  LLVM_FALLTHROUGH;
1256  case AArch64::LDARW:
1257  case AArch64::LDARB:
1258  case AArch64::LDARH:
1259  case AArch64::LDAXRW:
1260  case AArch64::LDAXRB:
1261  case AArch64::LDAXRH:
1262  case AArch64::LDXRW:
1263  case AArch64::LDXRB:
1264  case AArch64::LDXRH:
1265  case AArch64::STLRW:
1266  case AArch64::STLRB:
1267  case AArch64::STLRH:
1268  case AArch64::STLLRW:
1269  case AArch64::STLLRB:
1270  case AArch64::STLLRH:
1271  case AArch64::LDLARW:
1272  case AArch64::LDLARB:
1273  case AArch64::LDLARH:
1274  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1275  break;
1276  case AArch64::STLXRX:
1277  case AArch64::STXRX:
1278  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1279  LLVM_FALLTHROUGH;
1280  case AArch64::LDARX:
1281  case AArch64::LDAXRX:
1282  case AArch64::LDXRX:
1283  case AArch64::STLRX:
1284  case AArch64::LDLARX:
1285  case AArch64::STLLRX:
1286  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1287  break;
1288  case AArch64::STLXPW:
1289  case AArch64::STXPW:
1290  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1291  LLVM_FALLTHROUGH;
1292  case AArch64::LDAXPW:
1293  case AArch64::LDXPW:
1294  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1295  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1296  break;
1297  case AArch64::STLXPX:
1298  case AArch64::STXPX:
1299  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1300  LLVM_FALLTHROUGH;
1301  case AArch64::LDAXPX:
1302  case AArch64::LDXPX:
1303  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1304  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1305  break;
1306  }
1307 
1308  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1309 
1310  // You shouldn't load to the same register twice in an instruction...
1311  if ((Opcode == AArch64::LDAXPW || Opcode == AArch64::LDXPW ||
1312  Opcode == AArch64::LDAXPX || Opcode == AArch64::LDXPX) &&
1313  Rt == Rt2)
1314  return SoftFail;
1315 
1316  return Success;
1317 }
1318 
1319 static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn,
1320  uint64_t Addr,
1321  const MCDisassembler *Decoder) {
1322  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1323  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1324  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1325  int64_t offset = fieldFromInstruction(insn, 15, 7);
1326  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1327 
1328  // offset is a 7-bit signed immediate, so sign extend it to
1329  // fill the unsigned.
1330  if (offset & (1 << (7 - 1)))
1331  offset |= ~((1LL << 7) - 1);
1332 
1333  unsigned Opcode = Inst.getOpcode();
1334  bool NeedsDisjointWritebackTransfer = false;
1335 
1336  // First operand is always writeback of base register.
1337  switch (Opcode) {
1338  default:
1339  break;
1340  case AArch64::LDPXpost:
1341  case AArch64::STPXpost:
1342  case AArch64::LDPSWpost:
1343  case AArch64::LDPXpre:
1344  case AArch64::STPXpre:
1345  case AArch64::LDPSWpre:
1346  case AArch64::LDPWpost:
1347  case AArch64::STPWpost:
1348  case AArch64::LDPWpre:
1349  case AArch64::STPWpre:
1350  case AArch64::LDPQpost:
1351  case AArch64::STPQpost:
1352  case AArch64::LDPQpre:
1353  case AArch64::STPQpre:
1354  case AArch64::LDPDpost:
1355  case AArch64::STPDpost:
1356  case AArch64::LDPDpre:
1357  case AArch64::STPDpre:
1358  case AArch64::LDPSpost:
1359  case AArch64::STPSpost:
1360  case AArch64::LDPSpre:
1361  case AArch64::STPSpre:
1362  case AArch64::STGPpre:
1363  case AArch64::STGPpost:
1364  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1365  break;
1366  }
1367 
1368  switch (Opcode) {
1369  default:
1370  return Fail;
1371  case AArch64::LDPXpost:
1372  case AArch64::STPXpost:
1373  case AArch64::LDPSWpost:
1374  case AArch64::LDPXpre:
1375  case AArch64::STPXpre:
1376  case AArch64::LDPSWpre:
1377  case AArch64::STGPpre:
1378  case AArch64::STGPpost:
1379  NeedsDisjointWritebackTransfer = true;
1380  LLVM_FALLTHROUGH;
1381  case AArch64::LDNPXi:
1382  case AArch64::STNPXi:
1383  case AArch64::LDPXi:
1384  case AArch64::STPXi:
1385  case AArch64::LDPSWi:
1386  case AArch64::STGPi:
1387  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1388  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1389  break;
1390  case AArch64::LDPWpost:
1391  case AArch64::STPWpost:
1392  case AArch64::LDPWpre:
1393  case AArch64::STPWpre:
1394  NeedsDisjointWritebackTransfer = true;
1395  LLVM_FALLTHROUGH;
1396  case AArch64::LDNPWi:
1397  case AArch64::STNPWi:
1398  case AArch64::LDPWi:
1399  case AArch64::STPWi:
1400  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1401  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1402  break;
1403  case AArch64::LDNPQi:
1404  case AArch64::STNPQi:
1405  case AArch64::LDPQpost:
1406  case AArch64::STPQpost:
1407  case AArch64::LDPQi:
1408  case AArch64::STPQi:
1409  case AArch64::LDPQpre:
1410  case AArch64::STPQpre:
1411  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1412  DecodeFPR128RegisterClass(Inst, Rt2, Addr, Decoder);
1413  break;
1414  case AArch64::LDNPDi:
1415  case AArch64::STNPDi:
1416  case AArch64::LDPDpost:
1417  case AArch64::STPDpost:
1418  case AArch64::LDPDi:
1419  case AArch64::STPDi:
1420  case AArch64::LDPDpre:
1421  case AArch64::STPDpre:
1422  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1423  DecodeFPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1424  break;
1425  case AArch64::LDNPSi:
1426  case AArch64::STNPSi:
1427  case AArch64::LDPSpost:
1428  case AArch64::STPSpost:
1429  case AArch64::LDPSi:
1430  case AArch64::STPSi:
1431  case AArch64::LDPSpre:
1432  case AArch64::STPSpre:
1433  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1434  DecodeFPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1435  break;
1436  }
1437 
1438  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1439  Inst.addOperand(MCOperand::createImm(offset));
1440 
1441  // You shouldn't load to the same register twice in an instruction...
1442  if (IsLoad && Rt == Rt2)
1443  return SoftFail;
1444 
1445  // ... or do any operation that writes-back to a transfer register. But note
1446  // that "stp xzr, xzr, [sp], #4" is fine because xzr and sp are different.
1447  if (NeedsDisjointWritebackTransfer && Rn != 31 && (Rt == Rn || Rt2 == Rn))
1448  return SoftFail;
1449 
1450  return Success;
1451 }
1452 
1453 static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn,
1454  uint64_t Addr,
1455  const MCDisassembler *Decoder) {
1456  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1457  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1458  uint64_t offset = fieldFromInstruction(insn, 22, 1) << 9 |
1459  fieldFromInstruction(insn, 12, 9);
1460  unsigned writeback = fieldFromInstruction(insn, 11, 1);
1461 
1462  switch (Inst.getOpcode()) {
1463  default:
1464  return Fail;
1465  case AArch64::LDRAAwriteback:
1466  case AArch64::LDRABwriteback:
1467  DecodeGPR64spRegisterClass(Inst, Rn /* writeback register */, Addr,
1468  Decoder);
1469  break;
1470  case AArch64::LDRAAindexed:
1471  case AArch64::LDRABindexed:
1472  break;
1473  }
1474 
1475  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1476  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1477  DecodeSImm<10>(Inst, offset, Addr, Decoder);
1478 
1479  if (writeback && Rt == Rn && Rn != 31) {
1480  return SoftFail;
1481  }
1482 
1483  return Success;
1484 }
1485 
1486 static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn,
1487  uint64_t Addr,
1488  const MCDisassembler *Decoder) {
1489  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1490  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1491  unsigned Rm = fieldFromInstruction(insn, 16, 5);
1492  unsigned extend = fieldFromInstruction(insn, 10, 6);
1493 
1494  unsigned shift = extend & 0x7;
1495  if (shift > 4)
1496  return Fail;
1497 
1498  switch (Inst.getOpcode()) {
1499  default:
1500  return Fail;
1501  case AArch64::ADDWrx:
1502  case AArch64::SUBWrx:
1503  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1504  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1505  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1506  break;
1507  case AArch64::ADDSWrx:
1508  case AArch64::SUBSWrx:
1509  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1510  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1511  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1512  break;
1513  case AArch64::ADDXrx:
1514  case AArch64::SUBXrx:
1515  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1516  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1517  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1518  break;
1519  case AArch64::ADDSXrx:
1520  case AArch64::SUBSXrx:
1521  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1522  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1523  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1524  break;
1525  case AArch64::ADDXrx64:
1526  case AArch64::SUBXrx64:
1527  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1528  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1529  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1530  break;
1531  case AArch64::SUBSXrx64:
1532  case AArch64::ADDSXrx64:
1533  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1534  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1535  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1536  break;
1537  }
1538 
1539  Inst.addOperand(MCOperand::createImm(extend));
1540  return Success;
1541 }
1542 
1543 static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn,
1544  uint64_t Addr,
1545  const MCDisassembler *Decoder) {
1546  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1547  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1548  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1549  unsigned imm;
1550 
1551  if (Datasize) {
1552  if (Inst.getOpcode() == AArch64::ANDSXri)
1553  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1554  else
1555  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1556  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
1557  imm = fieldFromInstruction(insn, 10, 13);
1558  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1559  return Fail;
1560  } else {
1561  if (Inst.getOpcode() == AArch64::ANDSWri)
1562  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1563  else
1564  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1565  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
1566  imm = fieldFromInstruction(insn, 10, 12);
1567  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 32))
1568  return Fail;
1569  }
1570  Inst.addOperand(MCOperand::createImm(imm));
1571  return Success;
1572 }
1573 
1574 static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn,
1575  uint64_t Addr,
1576  const MCDisassembler *Decoder) {
1577  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1578  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1579  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1580  imm |= fieldFromInstruction(insn, 5, 5);
1581 
1582  if (Inst.getOpcode() == AArch64::MOVID)
1583  DecodeFPR64RegisterClass(Inst, Rd, Addr, Decoder);
1584  else
1585  DecodeFPR128RegisterClass(Inst, Rd, Addr, Decoder);
1586 
1587  Inst.addOperand(MCOperand::createImm(imm));
1588 
1589  switch (Inst.getOpcode()) {
1590  default:
1591  break;
1592  case AArch64::MOVIv4i16:
1593  case AArch64::MOVIv8i16:
1594  case AArch64::MVNIv4i16:
1595  case AArch64::MVNIv8i16:
1596  case AArch64::MOVIv2i32:
1597  case AArch64::MOVIv4i32:
1598  case AArch64::MVNIv2i32:
1599  case AArch64::MVNIv4i32:
1600  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1601  break;
1602  case AArch64::MOVIv2s_msl:
1603  case AArch64::MOVIv4s_msl:
1604  case AArch64::MVNIv2s_msl:
1605  case AArch64::MVNIv4s_msl:
1606  Inst.addOperand(MCOperand::createImm((cmode & 1) ? 0x110 : 0x108));
1607  break;
1608  }
1609 
1610  return Success;
1611 }
1612 
1613 static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn,
1614  uint64_t Addr,
1615  const MCDisassembler *Decoder) {
1616  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1617  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1618  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1619  imm |= fieldFromInstruction(insn, 5, 5);
1620 
1621  // Tied operands added twice.
1622  DecodeFPR128RegisterClass(Inst, Rd, Addr, Decoder);
1623  DecodeFPR128RegisterClass(Inst, Rd, Addr, Decoder);
1624 
1625  Inst.addOperand(MCOperand::createImm(imm));
1626  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1627 
1628  return Success;
1629 }
1630 
1631 static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn,
1632  uint64_t Addr,
1633  const MCDisassembler *Decoder) {
1634  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1635  int64_t imm = fieldFromInstruction(insn, 5, 19) << 2;
1636  imm |= fieldFromInstruction(insn, 29, 2);
1637 
1638  // Sign-extend the 21-bit immediate.
1639  if (imm & (1 << (21 - 1)))
1640  imm |= ~((1LL << 21) - 1);
1641 
1642  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1643  if (!Decoder->tryAddingSymbolicOperand(Inst, imm, Addr, Fail, 0, 0, 4))
1644  Inst.addOperand(MCOperand::createImm(imm));
1645 
1646  return Success;
1647 }
1648 
1649 static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn,
1650  uint64_t Addr,
1651  const MCDisassembler *Decoder) {
1652  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1653  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1654  unsigned Imm = fieldFromInstruction(insn, 10, 14);
1655  unsigned S = fieldFromInstruction(insn, 29, 1);
1656  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1657 
1658  unsigned ShifterVal = (Imm >> 12) & 3;
1659  unsigned ImmVal = Imm & 0xFFF;
1660 
1661  if (ShifterVal != 0 && ShifterVal != 1)
1662  return Fail;
1663 
1664  if (Datasize) {
1665  if (Rd == 31 && !S)
1666  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1667  else
1668  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1669  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1670  } else {
1671  if (Rd == 31 && !S)
1672  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1673  else
1674  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1675  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1676  }
1677 
1678  if (!Decoder->tryAddingSymbolicOperand(Inst, Imm, Addr, Fail, 0, 0, 4))
1679  Inst.addOperand(MCOperand::createImm(ImmVal));
1680  Inst.addOperand(MCOperand::createImm(12 * ShifterVal));
1681  return Success;
1682 }
1683 
1684 static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn,
1685  uint64_t Addr,
1686  const MCDisassembler *Decoder) {
1687  int64_t imm = fieldFromInstruction(insn, 0, 26);
1688 
1689  // Sign-extend the 26-bit immediate.
1690  if (imm & (1 << (26 - 1)))
1691  imm |= ~((1LL << 26) - 1);
1692 
1693  if (!Decoder->tryAddingSymbolicOperand(Inst, imm * 4, Addr, true, 0, 0, 4))
1694  Inst.addOperand(MCOperand::createImm(imm));
1695 
1696  return Success;
1697 }
1698 
1699 static DecodeStatus
1700 DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
1701  const MCDisassembler *Decoder) {
1702  uint64_t op1 = fieldFromInstruction(insn, 16, 3);
1703  uint64_t op2 = fieldFromInstruction(insn, 5, 3);
1704  uint64_t crm = fieldFromInstruction(insn, 8, 4);
1705  uint64_t pstate_field = (op1 << 3) | op2;
1706 
1707  switch (pstate_field) {
1708  case 0x01: // XAFlag
1709  case 0x02: // AXFlag
1710  return Fail;
1711  }
1712 
1713  if ((pstate_field == AArch64PState::PAN ||
1714  pstate_field == AArch64PState::UAO ||
1715  pstate_field == AArch64PState::SSBS) && crm > 1)
1716  return Fail;
1717 
1718  Inst.addOperand(MCOperand::createImm(pstate_field));
1719  Inst.addOperand(MCOperand::createImm(crm));
1720 
1721  auto PState = AArch64PState::lookupPStateByEncoding(pstate_field);
1722  if (PState &&
1723  PState->haveFeatures(Decoder->getSubtargetInfo().getFeatureBits()))
1724  return Success;
1725  return Fail;
1726 }
1727 
1728 static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn,
1729  uint64_t Addr,
1730  const MCDisassembler *Decoder) {
1731  uint64_t Rt = fieldFromInstruction(insn, 0, 5);
1732  uint64_t bit = fieldFromInstruction(insn, 31, 1) << 5;
1733  bit |= fieldFromInstruction(insn, 19, 5);
1734  int64_t dst = fieldFromInstruction(insn, 5, 14);
1735 
1736  // Sign-extend 14-bit immediate.
1737  if (dst & (1 << (14 - 1)))
1738  dst |= ~((1LL << 14) - 1);
1739 
1740  if (fieldFromInstruction(insn, 31, 1) == 0)
1741  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1742  else
1743  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1744  Inst.addOperand(MCOperand::createImm(bit));
1745  if (!Decoder->tryAddingSymbolicOperand(Inst, dst * 4, Addr, true, 0, 0, 4))
1746  Inst.addOperand(MCOperand::createImm(dst));
1747 
1748  return Success;
1749 }
1750 
1751 static DecodeStatus
1752 DecodeGPRSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegClassID,
1753  unsigned RegNo, uint64_t Addr,
1754  const MCDisassembler *Decoder) {
1755  // Register number must be even (see CASP instruction)
1756  if (RegNo & 0x1)
1757  return Fail;
1758 
1759  unsigned Reg = AArch64MCRegisterClasses[RegClassID].getRegister(RegNo / 2);
1760  Inst.addOperand(MCOperand::createReg(Reg));
1761  return Success;
1762 }
1763 
1764 static DecodeStatus
1765 DecodeWSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
1766  const MCDisassembler *Decoder) {
1767  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1768  AArch64::WSeqPairsClassRegClassID,
1769  RegNo, Addr, Decoder);
1770 }
1771 
1772 static DecodeStatus
1773 DecodeXSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
1774  const MCDisassembler *Decoder) {
1775  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1776  AArch64::XSeqPairsClassRegClassID,
1777  RegNo, Addr, Decoder);
1778 }
1779 
1780 static DecodeStatus
1781 DecodeSVELogicalImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
1782  const MCDisassembler *Decoder) {
1783  unsigned Zdn = fieldFromInstruction(insn, 0, 5);
1784  unsigned imm = fieldFromInstruction(insn, 5, 13);
1785  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1786  return Fail;
1787 
1788  // The same (tied) operand is added twice to the instruction.
1789  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1790  if (Inst.getOpcode() != AArch64::DUPM_ZI)
1791  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1792  Inst.addOperand(MCOperand::createImm(imm));
1793  return Success;
1794 }
1795 
1796 template <int Bits>
1797 static DecodeStatus DecodeSImm(MCInst &Inst, uint64_t Imm, uint64_t Address,
1798  const MCDisassembler *Decoder) {
1799  if (Imm & ~((1LL << Bits) - 1))
1800  return Fail;
1801 
1802  // Imm is a signed immediate, so sign extend it.
1803  if (Imm & (1 << (Bits - 1)))
1804  Imm |= ~((1LL << Bits) - 1);
1805 
1806  Inst.addOperand(MCOperand::createImm(Imm));
1807  return Success;
1808 }
1809 
1810 // Decode 8-bit signed/unsigned immediate for a given element width.
1811 template <int ElementWidth>
1812 static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm, uint64_t Addr,
1813  const MCDisassembler *Decoder) {
1814  unsigned Val = (uint8_t)Imm;
1815  unsigned Shift = (Imm & 0x100) ? 8 : 0;
1816  if (ElementWidth == 8 && Shift)
1817  return Fail;
1818  Inst.addOperand(MCOperand::createImm(Val));
1819  Inst.addOperand(MCOperand::createImm(Shift));
1820  return Success;
1821 }
1822 
1823 // Decode uimm4 ranged from 1-16.
1824 static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm,
1825  uint64_t Addr,
1826  const MCDisassembler *Decoder) {
1827  Inst.addOperand(MCOperand::createImm(Imm + 1));
1828  return Success;
1829 }
1830 
1831 static DecodeStatus DecodeSVCROp(MCInst &Inst, unsigned Imm, uint64_t Address,
1832  const MCDisassembler *Decoder) {
1833  if (AArch64SVCR::lookupSVCRByEncoding(Imm)) {
1834  Inst.addOperand(MCOperand::createImm(Imm));
1835  return Success;
1836  }
1837  return Fail;
1838 }
1839 
1840 static DecodeStatus DecodeCPYMemOpInstruction(MCInst &Inst, uint32_t insn,
1841  uint64_t Addr,
1842  const MCDisassembler *Decoder) {
1843  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1844  unsigned Rs = fieldFromInstruction(insn, 16, 5);
1845  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1846 
1847  // None of the registers may alias: if they do, then the instruction is not
1848  // merely unpredictable but actually entirely unallocated.
1849  if (Rd == Rs || Rs == Rn || Rd == Rn)
1850  return MCDisassembler::Fail;
1851 
1852  // All three register operands are written back, so they all appear
1853  // twice in the operand list, once as outputs and once as inputs.
1854  if (!DecodeGPR64commonRegisterClass(Inst, Rd, Addr, Decoder) ||
1855  !DecodeGPR64commonRegisterClass(Inst, Rs, Addr, Decoder) ||
1856  !DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder) ||
1857  !DecodeGPR64commonRegisterClass(Inst, Rd, Addr, Decoder) ||
1858  !DecodeGPR64commonRegisterClass(Inst, Rs, Addr, Decoder) ||
1859  !DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder))
1860  return MCDisassembler::Fail;
1861 
1862  return MCDisassembler::Success;
1863 }
1864 
1865 static DecodeStatus DecodeSETMemOpInstruction(MCInst &Inst, uint32_t insn,
1866  uint64_t Addr,
1867  const MCDisassembler *Decoder) {
1868  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1869  unsigned Rm = fieldFromInstruction(insn, 16, 5);
1870  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1871 
1872  // None of the registers may alias: if they do, then the instruction is not
1873  // merely unpredictable but actually entirely unallocated.
1874  if (Rd == Rm || Rm == Rn || Rd == Rn)
1875  return MCDisassembler::Fail;
1876 
1877  // Rd and Rn (not Rm) register operands are written back, so they appear
1878  // twice in the operand list, once as outputs and once as inputs.
1879  if (!DecodeGPR64commonRegisterClass(Inst, Rd, Addr, Decoder) ||
1880  !DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder) ||
1881  !DecodeGPR64commonRegisterClass(Inst, Rd, Addr, Decoder) ||
1882  !DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder) ||
1883  !DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder))
1884  return MCDisassembler::Fail;
1885 
1886  return MCDisassembler::Success;
1887 }
DecodeGPRSeqPairsClassRegisterClass
static DecodeStatus DecodeGPRSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegClassID, unsigned RegNo, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1752
i
i
Definition: README.txt:29
DecodeFPR128RegisterClass
static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:386
DecodeAddSubImmShift
static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1649
DecodeModImmInstruction
static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1574
createAArch64Disassembler
static MCDisassembler * createAArch64Disassembler(const Target &T, const MCSubtargetInfo &STI, MCContext &Ctx)
Definition: AArch64Disassembler.cpp:284
MI
IRTranslator LLVM IR MI
Definition: IRTranslator.cpp:104
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:17
DecodeDDRegisterClass
static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:693
DecodeSImm
static DecodeStatus DecodeSImm(MCInst &Inst, uint64_t Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1797
DecodeQQQQRegisterClass
static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:682
MCInstrDesc.h
T
llvm::MCOperand::createImm
static MCOperand createImm(int64_t Val)
Definition: MCInst.h:141
llvm::MCContext
Context object for machine code objects.
Definition: MCContext.h:76
DecodeSVELogicalImmInstruction
static DecodeStatus DecodeSVELogicalImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1781
DecodeZPR2RegisterClass
static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:571
DecodeAuthLoadInstruction
static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1453
llvm::Target
Target - Wrapper for Target specific information.
Definition: TargetRegistry.h:145
llvm::SmallVector
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
Definition: SmallVector.h:1185
LLVMInitializeAArch64Disassembler
LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64Disassembler()
Definition: AArch64Disassembler.cpp:362
ErrorHandling.h
DecodeDDDRegisterClass
static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:704
llvm::X86Disassembler::Reg
Reg
All possible values of the reg field in the ModR/M byte.
Definition: X86DisassemblerDecoder.h:462
DecodeGPR64commonRegisterClass
static DecodeStatus DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:455
DecodeSystemPStateInstruction
static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1700
AArch64BaseInfo.h
llvm::getTheAArch64_32Target
Target & getTheAArch64_32Target()
Definition: AArch64TargetInfo.cpp:21
Fail
#define Fail
Definition: AArch64Disassembler.cpp:281
llvm::MCDisassembler::tryAddingSymbolicOperand
bool tryAddingSymbolicOperand(MCInst &Inst, int64_t Value, uint64_t Address, bool IsBranch, uint64_t Offset, uint64_t OpSize, uint64_t InstSize) const
Definition: MCDisassembler.cpp:23
llvm::Triple
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
DecodeFPR16RegisterClass
static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:430
DecodeVecShiftL32Imm
static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:866
Disassembler.h
Shift
bool Shift
Definition: README.txt:468
llvm::MCDisassembler::SoftFail
@ SoftFail
Definition: MCDisassembler.h:111
AArch64ExternalSymbolizer.h
llvm::tgtok::Bits
@ Bits
Definition: TGLexer.h:50
DecodePPRRegisterClass
static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:638
llvm::AArch64::OPERAND_IMPLICIT_IMM_0
@ OPERAND_IMPLICIT_IMM_0
Definition: AArch64MCTargetDesc.h:70
createAArch64ExternalSymbolizer
static MCSymbolizer * createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo, LLVMSymbolLookupCallback SymbolLookUp, void *DisInfo, MCContext *Ctx, std::unique_ptr< MCRelocationInfo > &&RelInfo)
Definition: AArch64Disassembler.cpp:354
llvm::TargetRegistry::RegisterMCDisassembler
static void RegisterMCDisassembler(Target &T, Target::MCDisassemblerCtorTy Fn)
RegisterMCDisassembler - Register a MCDisassembler implementation for the given target.
Definition: TargetRegistry.h:951
DecodeMRSSystemRegister
static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:765
AArch64Disassembler.h
DecodeVecShiftR32ImmNarrow
static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:836
DecodeVecShiftR16ImmNarrow
static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:848
llvm::MCInst
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
MCDecoderOps.h
DecodeZPRRegisterClass
static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:543
DecodeVecShiftLImm
static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm, unsigned Add)
Definition: AArch64Disassembler.cpp:812
llvm::MCSymbolizer
Symbolize and annotate disassembled instructions.
Definition: MCSymbolizer.h:39
DecodePCRelLabel19
static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:742
DecodeVecShiftL8Imm
static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:878
x3
In x86 we generate this spiffy xmm0 xmm0 ret in x86 we generate this which could be xmm1 movss xmm1 xmm0 ret In sse4 we could use insertps to make both better Here s another testcase that could use x3
Definition: README-SSE.txt:547
DecodeLogicalImmInstruction
static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1543
LLVMSymbolLookupCallback
const typedef char *(* LLVMSymbolLookupCallback)(void *DisInfo, uint64_t ReferenceValue, uint64_t *ReferenceType, uint64_t ReferencePC, const char **ReferenceName)
The type for the symbol lookup function.
Definition: DisassemblerTypes.h:118
MatrixZATileDecoderTable
static const SmallVector< SmallVector< unsigned, 16 >, 5 > MatrixZATileDecoderTable
Definition: AArch64Disassembler.cpp:615
DecodeTestAndBranch
static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1728
llvm::getTheAArch64leTarget
Target & getTheAArch64leTarget()
Definition: AArch64TargetInfo.cpp:13
DecodeFPR64RegisterClass
static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:406
DecodeModImmTiedInstruction
static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1613
llvm::MCDisassembler::Success
@ Success
Definition: MCDisassembler.h:112
DecodeZPR4RegisterClass
static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:593
SoftFail
#define SoftFail
Definition: AArch64Disassembler.cpp:282
DecodeMSRSystemRegister
static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:775
llvm::MCDisassembler::CommentStream
raw_ostream * CommentStream
Definition: MCDisassembler.h:200
MCInst.h
llvm::MCInstrDesc
Describe properties that are true of each instruction in the target description file.
Definition: MCInstrDesc.h:197
MCSubtargetInfo.h
llvm::MCSubtargetInfo::getFeatureBits
const FeatureBitset & getFeatureBits() const
Definition: MCSubtargetInfo.h:112
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:54
DecodeVecShiftR16Imm
static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:842
DecodeMatrixTileListRegisterClass
static DecodeStatus DecodeMatrixTileListRegisterClass(MCInst &Inst, unsigned RegMask, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:605
DecodeThreeAddrSRegInstruction
static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:885
llvm::MCOperandInfo::RegClass
int16_t RegClass
This specifies the register class enumeration of the operand if the operand is a register.
Definition: MCInstrDesc.h:90
DecodePairLdStInstruction
static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1319
llvm::MCDisassembler::DecodeStatus
DecodeStatus
Ternary decode status.
Definition: MCDisassembler.h:109
llvm::MCDisassembler::STI
const MCSubtargetInfo & STI
Definition: MCDisassembler.h:179
llvm::MCInst::addOperand
void addOperand(const MCOperand Op)
Definition: MCInst.h:210
DecodeVecShiftL16Imm
static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:872
AArch64AddressingModes.h
Check
static bool Check(DecodeStatus &Out, DecodeStatus In)
Definition: AArch64Disassembler.cpp:262
llvm::tgtok::In
@ In
Definition: TGLexer.h:51
llvm::MCOperand::isImm
bool isImm() const
Definition: MCInst.h:62
uint64_t
LLVM_EXTERNAL_VISIBILITY
#define LLVM_EXTERNAL_VISIBILITY
Definition: Compiler.h:126
DecodeVecShiftR8Imm
static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:854
Addr
uint64_t Addr
Definition: ELFObjHandler.cpp:78
extend
_test eax xmm0 eax xmm1 comiss xmm1 setae al movzbl ecx eax edx ecx cmove eax ret Note the cmove can be replaced with a single cmovae There are a number of issues We are introducing a setcc between the result of the intrisic call and select The intrinsic is expected to produce a i32 value so a any extend(which becomes a zero extend) is added. We probably need some kind of target DAG combine hook to fix this. We generate significantly worse code for this than GCC
Definition: README.txt:213
DecodeVecShiftRImm
static DecodeStatus DecodeVecShiftRImm(MCInst &Inst, unsigned Imm, unsigned Add)
Definition: AArch64Disassembler.cpp:806
move
compiles ldr LCPI1_0 ldr ldr mov lsr tst moveq r1 ldr LCPI1_1 and r0 bx lr It would be better to do something like to fold the shift into the conditional move
Definition: README.txt:546
llvm::MCDisassembler
Superclass for all disassemblers.
Definition: MCDisassembler.h:85
llvm::MCOperandInfo::OperandType
uint8_t OperandType
Information about the type of the operand.
Definition: MCInstrDesc.h:96
llvm::MCOI::OPERAND_REGISTER
@ OPERAND_REGISTER
Definition: MCInstrDesc.h:60
DecodeVecShiftR64Imm
static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:818
MCRegisterInfo.h
DecodeFixedPointScaleImm32
static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:726
llvm::AArch64ExternalSymbolizer
Definition: AArch64ExternalSymbolizer.h:20
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
DecodeGPR64x8ClassRegisterClass
static DecodeStatus DecodeGPR64x8ClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:480
llvm::MCInstrDesc::OpInfo
const MCOperandInfo * OpInfo
Definition: MCInstrDesc.h:208
DecodeZPR_3bRegisterClass
static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:563
DecodeQQQRegisterClass
static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:671
DecodeFPR128_loRegisterClass
static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:399
llvm::getTheARM64_32Target
Target & getTheARM64_32Target()
Definition: AArch64TargetInfo.cpp:29
DecodeUnconditionalBranch
static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1684
llvm::ArrayRef< uint8_t >
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:143
llvm::MCOperand::createReg
static MCOperand createReg(unsigned Reg)
Definition: MCInst.h:134
uint32_t
DecodeMatrixIndexGPR32_12_15RegisterClass
static DecodeStatus DecodeMatrixIndexGPR32_12_15RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:506
Compiler.h
S
add sub stmia L5 ldr r0 bl L_printf $stub Instead of a and a wouldn t it be better to do three moves *Return an aggregate type is even return S
Definition: README.txt:210
LLVM_FALLTHROUGH
#define LLVM_FALLTHROUGH
LLVM_FALLTHROUGH - Mark fallthrough cases in switch statements.
Definition: Compiler.h:280
llvm::MCDisassembler::Fail
@ Fail
Definition: MCDisassembler.h:110
DecodeAdrInstruction
static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1631
llvm::Register
Wrapper class representing virtual and physical registers.
Definition: Register.h:19
DecodeFixedPointScaleImm64
static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:735
DecodeQQRegisterClass
static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:660
DecodeGPR32spRegisterClass
static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:531
Insn
SmallVector< AArch64_IMM::ImmInsnModel, 4 > Insn
Definition: AArch64MIPeepholeOpt.cpp:127
DecodeSignedLdStInstruction
static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1038
bit
compiles ldr LCPI1_0 ldr ldr mov lsr tst moveq r1 ldr LCPI1_1 and r0 bx lr It would be better to do something like to fold the shift into the conditional ldr LCPI1_0 ldr ldr tst movne lsr ldr LCPI1_1 and r0 bx lr it saves an instruction and a register It might be profitable to cse MOVi16 if there are lots of bit immediates with the same bottom half Robert Muth started working on an alternate jump table implementation that does not put the tables in line in the text This is more like the llvm default jump table implementation This might be useful sometime Several revisions of patches are on the mailing beginning while CMP sets them like a subtract Therefore to be able to use CMN for comparisons other than the Z bit
Definition: README.txt:584
DecodeFPR32RegisterClass
static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:418
DecodeVecShiftR64ImmNarrow
static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:824
Success
#define Success
Definition: AArch64Disassembler.cpp:280
DecodeGPR32RegisterClass
static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:519
llvm::AArch64Disassembler::getInstruction
MCDisassembler::DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, ArrayRef< uint8_t > Bytes, uint64_t Address, raw_ostream &CStream) const override
Returns the disassembly of a single instruction.
Definition: AArch64Disassembler.cpp:291
MCRelocationInfo.h
DecodeAddSubERegInstruction
static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1486
llvm::getTheAArch64beTarget
Target & getTheAArch64beTarget()
Definition: AArch64TargetInfo.cpp:17
llvm::MCInst::getOpcode
unsigned getOpcode() const
Definition: MCInst.h:198
DecodeMatrixTile
static DecodeStatus DecodeMatrixTile(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:627
DecodeZPR3RegisterClass
static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:582
AArch64MCTargetDesc.h
DecodeExclusiveLdStInstruction
static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1237
llvm::MCDisassembler::getSubtargetInfo
const MCSubtargetInfo & getSubtargetInfo() const
Definition: MCDisassembler.h:196
DecodeGPR64spRegisterClass
static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:494
llvm::RISCVMatInt::Imm
@ Imm
Definition: RISCVMatInt.h:23
DecodeFMOVLaneInstruction
static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:783
DecodeDDDDRegisterClass
static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:715
DecodeXSeqPairsClassRegisterClass
static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1773
llvm::getTheARM64Target
Target & getTheARM64Target()
Definition: AArch64TargetInfo.cpp:25
DecodeImm8OptLsl
static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1812
llvm::MCInst::getOperand
const MCOperand & getOperand(unsigned i) const
Definition: MCInst.h:206
llvm::AArch64_AM::isValidDecodeLogicalImmediate
static bool isValidDecodeLogicalImmediate(uint64_t val, unsigned regSize)
isValidDecodeLogicalImmediate - Check to see if the logical immediate value in the form "N:immr:imms"...
Definition: AArch64AddressingModes.h:322
llvm::ArrayRef::size
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:164
shift
http eax xorl edx cl sete al setne dl sall eax sall edx But that requires good bit subreg support this might be better It s an extra shift
Definition: README.txt:30
DecodeZPR_4bRegisterClass
static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:555
llvm::AArch64Disassembler
Definition: AArch64Disassembler.h:20
DecodeFPR8RegisterClass
static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:442
DecodeWSeqPairsClassRegisterClass
static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1765
llvm::TargetRegistry::RegisterMCSymbolizer
static void RegisterMCSymbolizer(Target &T, Target::MCSymbolizerCtorTy Fn)
RegisterMCSymbolizer - Register an MCSymbolizer implementation for the given target.
Definition: TargetRegistry.h:1049
DecodeMoveImmInstruction
static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:946
DecodePPR_3bRegisterClass
static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:650
llvm::MCOperand
Instances of this class represent operands of the MCInst class.
Definition: MCInst.h:36
DecodeVecShiftR32Imm
static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:830
DecodeGPR64RegisterClass
static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:467
TargetRegistry.h
DecodeSVCROp
static DecodeStatus DecodeSVCROp(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1831
DecodeVecShiftL64Imm
static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:860
DecodeSETMemOpInstruction
static DecodeStatus DecodeSETMemOpInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1865
llvm::MCSubtargetInfo
Generic base class for all target subtargets.
Definition: MCSubtargetInfo.h:76
llvm::MCInstrDesc::getNumOperands
unsigned getNumOperands() const
Return the number of declared MachineOperands for this MachineInstruction.
Definition: MCInstrDesc.h:230
Debug.h
DecodeUnsignedLdStInstruction
static DecodeStatus DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:980
DecodeMemExtend
static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:757
DecodeSVEIncDecImm
static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1824
AArch64TargetInfo.h
DecodeCPYMemOpInstruction
static DecodeStatus DecodeCPYMemOpInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1840
LLVMOpInfoCallback
int(* LLVMOpInfoCallback)(void *DisInfo, uint64_t PC, uint64_t Offset, uint64_t OpSize, uint64_t InstSize, int TagType, void *TagBuf)
The type for the operand information call back function.
Definition: DisassemblerTypes.h:48
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