LLVM  16.0.0git
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 (const 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 uint64_t AArch64Disassembler::suggestBytesToSkip(ArrayRef<uint8_t> Bytes,
354  uint64_t Address) const {
355  // AArch64 instructions are always 4 bytes wide, so there's no point
356  // in skipping any smaller number of bytes if an instruction can't
357  // be decoded.
358  return 4;
359 }
360 
361 static MCSymbolizer *
362 createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo,
363  LLVMSymbolLookupCallback SymbolLookUp,
364  void *DisInfo, MCContext *Ctx,
365  std::unique_ptr<MCRelocationInfo> &&RelInfo) {
366  return new AArch64ExternalSymbolizer(*Ctx, std::move(RelInfo), GetOpInfo,
367  SymbolLookUp, DisInfo);
368 }
369 
370 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64Disassembler() {
371  TargetRegistry::RegisterMCDisassembler(getTheAArch64leTarget(),
372  createAArch64Disassembler);
373  TargetRegistry::RegisterMCDisassembler(getTheAArch64beTarget(),
374  createAArch64Disassembler);
375  TargetRegistry::RegisterMCSymbolizer(getTheAArch64leTarget(),
376  createAArch64ExternalSymbolizer);
377  TargetRegistry::RegisterMCSymbolizer(getTheAArch64beTarget(),
378  createAArch64ExternalSymbolizer);
379  TargetRegistry::RegisterMCDisassembler(getTheAArch64_32Target(),
380  createAArch64Disassembler);
381  TargetRegistry::RegisterMCSymbolizer(getTheAArch64_32Target(),
382  createAArch64ExternalSymbolizer);
383 
384  TargetRegistry::RegisterMCDisassembler(getTheARM64Target(),
385  createAArch64Disassembler);
386  TargetRegistry::RegisterMCSymbolizer(getTheARM64Target(),
387  createAArch64ExternalSymbolizer);
388  TargetRegistry::RegisterMCDisassembler(getTheARM64_32Target(),
389  createAArch64Disassembler);
390  TargetRegistry::RegisterMCSymbolizer(getTheARM64_32Target(),
391  createAArch64ExternalSymbolizer);
392 }
393 
394 static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo,
395  uint64_t Addr,
396  const MCDisassembler *Decoder) {
397  if (RegNo > 31)
398  return Fail;
399 
400  unsigned Register =
401  AArch64MCRegisterClasses[AArch64::FPR128RegClassID].getRegister(RegNo);
402  Inst.addOperand(MCOperand::createReg(Register));
403  return Success;
404 }
405 
406 static DecodeStatus
407 DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
408  const MCDisassembler *Decoder) {
409  if (RegNo > 15)
410  return Fail;
411  return DecodeFPR128RegisterClass(Inst, RegNo, Addr, Decoder);
412 }
413 
414 static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo,
415  uint64_t Addr,
416  const MCDisassembler *Decoder) {
417  if (RegNo > 31)
418  return Fail;
419 
420  unsigned Register =
421  AArch64MCRegisterClasses[AArch64::FPR64RegClassID].getRegister(RegNo);
422  Inst.addOperand(MCOperand::createReg(Register));
423  return Success;
424 }
425 
426 static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo,
427  uint64_t Addr,
428  const MCDisassembler *Decoder) {
429  if (RegNo > 31)
430  return Fail;
431 
432  unsigned Register =
433  AArch64MCRegisterClasses[AArch64::FPR32RegClassID].getRegister(RegNo);
434  Inst.addOperand(MCOperand::createReg(Register));
435  return Success;
436 }
437 
438 static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo,
439  uint64_t Addr,
440  const MCDisassembler *Decoder) {
441  if (RegNo > 31)
442  return Fail;
443 
444  unsigned Register =
445  AArch64MCRegisterClasses[AArch64::FPR16RegClassID].getRegister(RegNo);
446  Inst.addOperand(MCOperand::createReg(Register));
447  return Success;
448 }
449 
450 static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo,
451  uint64_t Addr,
452  const MCDisassembler *Decoder) {
453  if (RegNo > 31)
454  return Fail;
455 
456  unsigned Register =
457  AArch64MCRegisterClasses[AArch64::FPR8RegClassID].getRegister(RegNo);
458  Inst.addOperand(MCOperand::createReg(Register));
459  return Success;
460 }
461 
462 static DecodeStatus
463 DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
464  const MCDisassembler *Decoder) {
465  if (RegNo > 30)
466  return Fail;
467 
468  unsigned Register =
469  AArch64MCRegisterClasses[AArch64::GPR64commonRegClassID].getRegister(
470  RegNo);
471  Inst.addOperand(MCOperand::createReg(Register));
472  return Success;
473 }
474 
475 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo,
476  uint64_t Addr,
477  const MCDisassembler *Decoder) {
478  if (RegNo > 31)
479  return Fail;
480 
481  unsigned Register =
482  AArch64MCRegisterClasses[AArch64::GPR64RegClassID].getRegister(RegNo);
483  Inst.addOperand(MCOperand::createReg(Register));
484  return Success;
485 }
486 
487 static DecodeStatus
488 DecodeGPR64x8ClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
489  const MCDisassembler *Decoder) {
490  if (RegNo > 22)
491  return Fail;
492  if (RegNo & 1)
493  return Fail;
494 
495  unsigned Register =
496  AArch64MCRegisterClasses[AArch64::GPR64x8ClassRegClassID].getRegister(
497  RegNo >> 1);
498  Inst.addOperand(MCOperand::createReg(Register));
499  return Success;
500 }
501 
502 static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo,
503  uint64_t Addr,
504  const MCDisassembler *Decoder) {
505  if (RegNo > 31)
506  return Fail;
507  unsigned Register =
508  AArch64MCRegisterClasses[AArch64::GPR64spRegClassID].getRegister(RegNo);
509  Inst.addOperand(MCOperand::createReg(Register));
510  return Success;
511 }
512 
513 static DecodeStatus
514 DecodeMatrixIndexGPR32_12_15RegisterClass(MCInst &Inst, unsigned RegNo,
515  uint64_t Addr,
516  const MCDisassembler *Decoder) {
517  if (RegNo > 3)
518  return Fail;
519 
520  unsigned Register =
521  AArch64MCRegisterClasses[AArch64::MatrixIndexGPR32_12_15RegClassID]
522  .getRegister(RegNo);
523  Inst.addOperand(MCOperand::createReg(Register));
524  return Success;
525 }
526 
527 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo,
528  uint64_t Addr,
529  const MCDisassembler *Decoder) {
530  if (RegNo > 31)
531  return Fail;
532 
533  unsigned Register =
534  AArch64MCRegisterClasses[AArch64::GPR32RegClassID].getRegister(RegNo);
535  Inst.addOperand(MCOperand::createReg(Register));
536  return Success;
537 }
538 
539 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo,
540  uint64_t Addr,
541  const MCDisassembler *Decoder) {
542  if (RegNo > 31)
543  return Fail;
544 
545  unsigned Register =
546  AArch64MCRegisterClasses[AArch64::GPR32spRegClassID].getRegister(RegNo);
547  Inst.addOperand(MCOperand::createReg(Register));
548  return Success;
549 }
550 
551 static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo,
552  uint64_t Address,
553  const MCDisassembler *Decoder) {
554  if (RegNo > 31)
555  return Fail;
556 
557  unsigned Register =
558  AArch64MCRegisterClasses[AArch64::ZPRRegClassID].getRegister(RegNo);
559  Inst.addOperand(MCOperand::createReg(Register));
560  return Success;
561 }
562 
563 static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo,
564  uint64_t Address,
565  const MCDisassembler *Decoder) {
566  if (RegNo > 15)
567  return Fail;
568  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
569 }
570 
571 static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
572  uint64_t Address,
573  const MCDisassembler *Decoder) {
574  if (RegNo > 7)
575  return Fail;
576  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
577 }
578 
579 static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo,
580  uint64_t Address,
581  const MCDisassembler *Decoder) {
582  if (RegNo > 31)
583  return Fail;
584  unsigned Register =
585  AArch64MCRegisterClasses[AArch64::ZPR2RegClassID].getRegister(RegNo);
586  Inst.addOperand(MCOperand::createReg(Register));
587  return Success;
588 }
589 
590 static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo,
591  uint64_t Address,
592  const MCDisassembler *Decoder) {
593  if (RegNo > 31)
594  return Fail;
595  unsigned Register =
596  AArch64MCRegisterClasses[AArch64::ZPR3RegClassID].getRegister(RegNo);
597  Inst.addOperand(MCOperand::createReg(Register));
598  return Success;
599 }
600 
601 static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo,
602  uint64_t Address,
603  const MCDisassembler *Decoder) {
604  if (RegNo > 31)
605  return Fail;
606  unsigned Register =
607  AArch64MCRegisterClasses[AArch64::ZPR4RegClassID].getRegister(RegNo);
608  Inst.addOperand(MCOperand::createReg(Register));
609  return Success;
610 }
611 
612 static DecodeStatus
613 DecodeMatrixTileListRegisterClass(MCInst &Inst, unsigned RegMask,
614  uint64_t Address,
615  const MCDisassembler *Decoder) {
616  if (RegMask > 0xFF)
617  return Fail;
618  Inst.addOperand(MCOperand::createImm(RegMask));
619  return Success;
620 }
621 
622 static const SmallVector<SmallVector<unsigned, 16>, 5>
623  MatrixZATileDecoderTable = {
624  {AArch64::ZAB0},
625  {AArch64::ZAH0, AArch64::ZAH1},
626  {AArch64::ZAS0, AArch64::ZAS1, AArch64::ZAS2, AArch64::ZAS3},
627  {AArch64::ZAD0, AArch64::ZAD1, AArch64::ZAD2, AArch64::ZAD3,
628  AArch64::ZAD4, AArch64::ZAD5, AArch64::ZAD6, AArch64::ZAD7},
629  {AArch64::ZAQ0, AArch64::ZAQ1, AArch64::ZAQ2, AArch64::ZAQ3,
630  AArch64::ZAQ4, AArch64::ZAQ5, AArch64::ZAQ6, AArch64::ZAQ7,
631  AArch64::ZAQ8, AArch64::ZAQ9, AArch64::ZAQ10, AArch64::ZAQ11,
632  AArch64::ZAQ12, AArch64::ZAQ13, AArch64::ZAQ14, AArch64::ZAQ15}};
633 
634 template <unsigned NumBitsForTile>
635 static DecodeStatus DecodeMatrixTile(MCInst &Inst, unsigned RegNo,
636  uint64_t Address,
637  const MCDisassembler *Decoder) {
638  unsigned LastReg = (1 << NumBitsForTile) - 1;
639  if (RegNo > LastReg)
640  return Fail;
641  Inst.addOperand(
642  MCOperand::createReg(MatrixZATileDecoderTable[NumBitsForTile][RegNo]));
643  return Success;
644 }
645 
646 static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo,
647  uint64_t Addr,
648  const MCDisassembler *Decoder) {
649  if (RegNo > 15)
650  return Fail;
651 
652  unsigned Register =
653  AArch64MCRegisterClasses[AArch64::PPRRegClassID].getRegister(RegNo);
654  Inst.addOperand(MCOperand::createReg(Register));
655  return Success;
656 }
657 
658 static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
659  uint64_t Addr,
660  const MCDisassembler *Decoder) {
661  if (RegNo > 7)
662  return Fail;
663 
664  // Just reuse the PPR decode table
665  return DecodePPRRegisterClass(Inst, RegNo, Addr, Decoder);
666 }
667 
668 static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo,
669  uint64_t Addr,
670  const MCDisassembler *Decoder) {
671  if (RegNo > 31)
672  return Fail;
673  unsigned Register =
674  AArch64MCRegisterClasses[AArch64::QQRegClassID].getRegister(RegNo);
675  Inst.addOperand(MCOperand::createReg(Register));
676  return Success;
677 }
678 
679 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo,
680  uint64_t Addr,
681  const MCDisassembler *Decoder) {
682  if (RegNo > 31)
683  return Fail;
684  unsigned Register =
685  AArch64MCRegisterClasses[AArch64::QQQRegClassID].getRegister(RegNo);
686  Inst.addOperand(MCOperand::createReg(Register));
687  return Success;
688 }
689 
690 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo,
691  uint64_t Addr,
692  const MCDisassembler *Decoder) {
693  if (RegNo > 31)
694  return Fail;
695  unsigned Register =
696  AArch64MCRegisterClasses[AArch64::QQQQRegClassID].getRegister(RegNo);
697  Inst.addOperand(MCOperand::createReg(Register));
698  return Success;
699 }
700 
701 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo,
702  uint64_t Addr,
703  const MCDisassembler *Decoder) {
704  if (RegNo > 31)
705  return Fail;
706  unsigned Register =
707  AArch64MCRegisterClasses[AArch64::DDRegClassID].getRegister(RegNo);
708  Inst.addOperand(MCOperand::createReg(Register));
709  return Success;
710 }
711 
712 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo,
713  uint64_t Addr,
714  const MCDisassembler *Decoder) {
715  if (RegNo > 31)
716  return Fail;
717  unsigned Register =
718  AArch64MCRegisterClasses[AArch64::DDDRegClassID].getRegister(RegNo);
719  Inst.addOperand(MCOperand::createReg(Register));
720  return Success;
721 }
722 
723 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo,
724  uint64_t Addr,
725  const MCDisassembler *Decoder) {
726  if (RegNo > 31)
727  return Fail;
728  unsigned Register =
729  AArch64MCRegisterClasses[AArch64::DDDDRegClassID].getRegister(RegNo);
730  Inst.addOperand(MCOperand::createReg(Register));
731  return Success;
732 }
733 
734 static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm,
735  uint64_t Addr,
736  const MCDisassembler *Decoder) {
737  // scale{5} is asserted as 1 in tblgen.
738  Imm |= 0x20;
739  Inst.addOperand(MCOperand::createImm(64 - Imm));
740  return Success;
741 }
742 
743 static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm,
744  uint64_t Addr,
745  const MCDisassembler *Decoder) {
746  Inst.addOperand(MCOperand::createImm(64 - Imm));
747  return Success;
748 }
749 
750 static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm,
751  uint64_t Addr,
752  const MCDisassembler *Decoder) {
753  int64_t ImmVal = Imm;
754 
755  // Sign-extend 19-bit immediate.
756  if (ImmVal & (1 << (19 - 1)))
757  ImmVal |= ~((1LL << 19) - 1);
758 
759  if (!Decoder->tryAddingSymbolicOperand(
760  Inst, ImmVal * 4, Addr, Inst.getOpcode() != AArch64::LDRXl, 0, 0, 4))
761  Inst.addOperand(MCOperand::createImm(ImmVal));
762  return Success;
763 }
764 
765 static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm,
766  uint64_t Address,
767  const MCDisassembler *Decoder) {
768  Inst.addOperand(MCOperand::createImm((Imm >> 1) & 1));
769  Inst.addOperand(MCOperand::createImm(Imm & 1));
770  return Success;
771 }
772 
773 static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm,
774  uint64_t Address,
775  const MCDisassembler *Decoder) {
776  Inst.addOperand(MCOperand::createImm(Imm));
777 
778  // Every system register in the encoding space is valid with the syntax
779  // S<op0>_<op1>_<Cn>_<Cm>_<op2>, so decoding system registers always succeeds.
780  return Success;
781 }
782 
783 static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm,
784  uint64_t Address,
785  const MCDisassembler *Decoder) {
786  Inst.addOperand(MCOperand::createImm(Imm));
787 
788  return Success;
789 }
790 
791 static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn,
792  uint64_t Address,
793  const MCDisassembler *Decoder) {
794  // This decoder exists to add the dummy Lane operand to the MCInst, which must
795  // be 1 in assembly but has no other real manifestation.
796  unsigned Rd = fieldFromInstruction(Insn, 0, 5);
797  unsigned Rn = fieldFromInstruction(Insn, 5, 5);
798  unsigned IsToVec = fieldFromInstruction(Insn, 16, 1);
799 
800  if (IsToVec) {
801  DecodeFPR128RegisterClass(Inst, Rd, Address, Decoder);
802  DecodeGPR64RegisterClass(Inst, Rn, Address, Decoder);
803  } else {
804  DecodeGPR64RegisterClass(Inst, Rd, Address, Decoder);
805  DecodeFPR128RegisterClass(Inst, Rn, Address, Decoder);
806  }
807 
808  // Add the lane
809  Inst.addOperand(MCOperand::createImm(1));
810 
811  return Success;
812 }
813 
814 static DecodeStatus DecodeVecShiftRImm(MCInst &Inst, unsigned Imm,
815  unsigned Add) {
816  Inst.addOperand(MCOperand::createImm(Add - Imm));
817  return Success;
818 }
819 
820 static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm,
821  unsigned Add) {
822  Inst.addOperand(MCOperand::createImm((Imm + Add) & (Add - 1)));
823  return Success;
824 }
825 
826 static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm,
827  uint64_t Addr,
828  const MCDisassembler *Decoder) {
829  return DecodeVecShiftRImm(Inst, Imm, 64);
830 }
831 
832 static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm,
833  uint64_t Addr,
834  const MCDisassembler *Decoder) {
835  return DecodeVecShiftRImm(Inst, Imm | 0x20, 64);
836 }
837 
838 static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm,
839  uint64_t Addr,
840  const MCDisassembler *Decoder) {
841  return DecodeVecShiftRImm(Inst, Imm, 32);
842 }
843 
844 static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm,
845  uint64_t Addr,
846  const MCDisassembler *Decoder) {
847  return DecodeVecShiftRImm(Inst, Imm | 0x10, 32);
848 }
849 
850 static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm,
851  uint64_t Addr,
852  const MCDisassembler *Decoder) {
853  return DecodeVecShiftRImm(Inst, Imm, 16);
854 }
855 
856 static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm,
857  uint64_t Addr,
858  const MCDisassembler *Decoder) {
859  return DecodeVecShiftRImm(Inst, Imm | 0x8, 16);
860 }
861 
862 static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm,
863  uint64_t Addr,
864  const MCDisassembler *Decoder) {
865  return DecodeVecShiftRImm(Inst, Imm, 8);
866 }
867 
868 static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm,
869  uint64_t Addr,
870  const MCDisassembler *Decoder) {
871  return DecodeVecShiftLImm(Inst, Imm, 64);
872 }
873 
874 static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm,
875  uint64_t Addr,
876  const MCDisassembler *Decoder) {
877  return DecodeVecShiftLImm(Inst, Imm, 32);
878 }
879 
880 static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm,
881  uint64_t Addr,
882  const MCDisassembler *Decoder) {
883  return DecodeVecShiftLImm(Inst, Imm, 16);
884 }
885 
886 static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm,
887  uint64_t Addr,
888  const MCDisassembler *Decoder) {
889  return DecodeVecShiftLImm(Inst, Imm, 8);
890 }
891 
892 static DecodeStatus
893 DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
894  const MCDisassembler *Decoder) {
895  unsigned Rd = fieldFromInstruction(insn, 0, 5);
896  unsigned Rn = fieldFromInstruction(insn, 5, 5);
897  unsigned Rm = fieldFromInstruction(insn, 16, 5);
898  unsigned shiftHi = fieldFromInstruction(insn, 22, 2);
899  unsigned shiftLo = fieldFromInstruction(insn, 10, 6);
900  unsigned shift = (shiftHi << 6) | shiftLo;
901  switch (Inst.getOpcode()) {
902  default:
903  return Fail;
904  case AArch64::ADDWrs:
905  case AArch64::ADDSWrs:
906  case AArch64::SUBWrs:
907  case AArch64::SUBSWrs:
908  // if shift == '11' then ReservedValue()
909  if (shiftHi == 0x3)
910  return Fail;
911  [[fallthrough]];
912  case AArch64::ANDWrs:
913  case AArch64::ANDSWrs:
914  case AArch64::BICWrs:
915  case AArch64::BICSWrs:
916  case AArch64::ORRWrs:
917  case AArch64::ORNWrs:
918  case AArch64::EORWrs:
919  case AArch64::EONWrs: {
920  // if sf == '0' and imm6<5> == '1' then ReservedValue()
921  if (shiftLo >> 5 == 1)
922  return Fail;
923  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
924  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
925  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
926  break;
927  }
928  case AArch64::ADDXrs:
929  case AArch64::ADDSXrs:
930  case AArch64::SUBXrs:
931  case AArch64::SUBSXrs:
932  // if shift == '11' then ReservedValue()
933  if (shiftHi == 0x3)
934  return Fail;
935  [[fallthrough]];
936  case AArch64::ANDXrs:
937  case AArch64::ANDSXrs:
938  case AArch64::BICXrs:
939  case AArch64::BICSXrs:
940  case AArch64::ORRXrs:
941  case AArch64::ORNXrs:
942  case AArch64::EORXrs:
943  case AArch64::EONXrs:
944  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
945  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
946  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
947  break;
948  }
949 
950  Inst.addOperand(MCOperand::createImm(shift));
951  return Success;
952 }
953 
954 static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn,
955  uint64_t Addr,
956  const MCDisassembler *Decoder) {
957  unsigned Rd = fieldFromInstruction(insn, 0, 5);
958  unsigned imm = fieldFromInstruction(insn, 5, 16);
959  unsigned shift = fieldFromInstruction(insn, 21, 2);
960  shift <<= 4;
961  switch (Inst.getOpcode()) {
962  default:
963  return Fail;
964  case AArch64::MOVZWi:
965  case AArch64::MOVNWi:
966  case AArch64::MOVKWi:
967  if (shift & (1U << 5))
968  return Fail;
969  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
970  break;
971  case AArch64::MOVZXi:
972  case AArch64::MOVNXi:
973  case AArch64::MOVKXi:
974  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
975  break;
976  }
977 
978  if (Inst.getOpcode() == AArch64::MOVKWi ||
979  Inst.getOpcode() == AArch64::MOVKXi)
980  Inst.addOperand(Inst.getOperand(0));
981 
982  Inst.addOperand(MCOperand::createImm(imm));
983  Inst.addOperand(MCOperand::createImm(shift));
984  return Success;
985 }
986 
987 static DecodeStatus
988 DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
989  const MCDisassembler *Decoder) {
990  unsigned Rt = fieldFromInstruction(insn, 0, 5);
991  unsigned Rn = fieldFromInstruction(insn, 5, 5);
992  unsigned offset = fieldFromInstruction(insn, 10, 12);
993 
994  switch (Inst.getOpcode()) {
995  default:
996  return Fail;
997  case AArch64::PRFMui:
998  // Rt is an immediate in prefetch.
999  Inst.addOperand(MCOperand::createImm(Rt));
1000  break;
1001  case AArch64::STRBBui:
1002  case AArch64::LDRBBui:
1003  case AArch64::LDRSBWui:
1004  case AArch64::STRHHui:
1005  case AArch64::LDRHHui:
1006  case AArch64::LDRSHWui:
1007  case AArch64::STRWui:
1008  case AArch64::LDRWui:
1009  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1010  break;
1011  case AArch64::LDRSBXui:
1012  case AArch64::LDRSHXui:
1013  case AArch64::LDRSWui:
1014  case AArch64::STRXui:
1015  case AArch64::LDRXui:
1016  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1017  break;
1018  case AArch64::LDRQui:
1019  case AArch64::STRQui:
1020  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1021  break;
1022  case AArch64::LDRDui:
1023  case AArch64::STRDui:
1024  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1025  break;
1026  case AArch64::LDRSui:
1027  case AArch64::STRSui:
1028  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1029  break;
1030  case AArch64::LDRHui:
1031  case AArch64::STRHui:
1032  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1033  break;
1034  case AArch64::LDRBui:
1035  case AArch64::STRBui:
1036  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1037  break;
1038  }
1039 
1040  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1041  if (!Decoder->tryAddingSymbolicOperand(Inst, offset, Addr, Fail, 0, 0, 4))
1042  Inst.addOperand(MCOperand::createImm(offset));
1043  return Success;
1044 }
1045 
1046 static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn,
1047  uint64_t Addr,
1048  const MCDisassembler *Decoder) {
1049  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1050  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1051  int64_t offset = fieldFromInstruction(insn, 12, 9);
1052 
1053  // offset is a 9-bit signed immediate, so sign extend it to
1054  // fill the unsigned.
1055  if (offset & (1 << (9 - 1)))
1056  offset |= ~((1LL << 9) - 1);
1057 
1058  // First operand is always the writeback to the address register, if needed.
1059  switch (Inst.getOpcode()) {
1060  default:
1061  break;
1062  case AArch64::LDRSBWpre:
1063  case AArch64::LDRSHWpre:
1064  case AArch64::STRBBpre:
1065  case AArch64::LDRBBpre:
1066  case AArch64::STRHHpre:
1067  case AArch64::LDRHHpre:
1068  case AArch64::STRWpre:
1069  case AArch64::LDRWpre:
1070  case AArch64::LDRSBWpost:
1071  case AArch64::LDRSHWpost:
1072  case AArch64::STRBBpost:
1073  case AArch64::LDRBBpost:
1074  case AArch64::STRHHpost:
1075  case AArch64::LDRHHpost:
1076  case AArch64::STRWpost:
1077  case AArch64::LDRWpost:
1078  case AArch64::LDRSBXpre:
1079  case AArch64::LDRSHXpre:
1080  case AArch64::STRXpre:
1081  case AArch64::LDRSWpre:
1082  case AArch64::LDRXpre:
1083  case AArch64::LDRSBXpost:
1084  case AArch64::LDRSHXpost:
1085  case AArch64::STRXpost:
1086  case AArch64::LDRSWpost:
1087  case AArch64::LDRXpost:
1088  case AArch64::LDRQpre:
1089  case AArch64::STRQpre:
1090  case AArch64::LDRQpost:
1091  case AArch64::STRQpost:
1092  case AArch64::LDRDpre:
1093  case AArch64::STRDpre:
1094  case AArch64::LDRDpost:
1095  case AArch64::STRDpost:
1096  case AArch64::LDRSpre:
1097  case AArch64::STRSpre:
1098  case AArch64::LDRSpost:
1099  case AArch64::STRSpost:
1100  case AArch64::LDRHpre:
1101  case AArch64::STRHpre:
1102  case AArch64::LDRHpost:
1103  case AArch64::STRHpost:
1104  case AArch64::LDRBpre:
1105  case AArch64::STRBpre:
1106  case AArch64::LDRBpost:
1107  case AArch64::STRBpost:
1108  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1109  break;
1110  }
1111 
1112  switch (Inst.getOpcode()) {
1113  default:
1114  return Fail;
1115  case AArch64::PRFUMi:
1116  // Rt is an immediate in prefetch.
1117  Inst.addOperand(MCOperand::createImm(Rt));
1118  break;
1119  case AArch64::STURBBi:
1120  case AArch64::LDURBBi:
1121  case AArch64::LDURSBWi:
1122  case AArch64::STURHHi:
1123  case AArch64::LDURHHi:
1124  case AArch64::LDURSHWi:
1125  case AArch64::STURWi:
1126  case AArch64::LDURWi:
1127  case AArch64::LDTRSBWi:
1128  case AArch64::LDTRSHWi:
1129  case AArch64::STTRWi:
1130  case AArch64::LDTRWi:
1131  case AArch64::STTRHi:
1132  case AArch64::LDTRHi:
1133  case AArch64::LDTRBi:
1134  case AArch64::STTRBi:
1135  case AArch64::LDRSBWpre:
1136  case AArch64::LDRSHWpre:
1137  case AArch64::STRBBpre:
1138  case AArch64::LDRBBpre:
1139  case AArch64::STRHHpre:
1140  case AArch64::LDRHHpre:
1141  case AArch64::STRWpre:
1142  case AArch64::LDRWpre:
1143  case AArch64::LDRSBWpost:
1144  case AArch64::LDRSHWpost:
1145  case AArch64::STRBBpost:
1146  case AArch64::LDRBBpost:
1147  case AArch64::STRHHpost:
1148  case AArch64::LDRHHpost:
1149  case AArch64::STRWpost:
1150  case AArch64::LDRWpost:
1151  case AArch64::STLURBi:
1152  case AArch64::STLURHi:
1153  case AArch64::STLURWi:
1154  case AArch64::LDAPURBi:
1155  case AArch64::LDAPURSBWi:
1156  case AArch64::LDAPURHi:
1157  case AArch64::LDAPURSHWi:
1158  case AArch64::LDAPURi:
1159  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1160  break;
1161  case AArch64::LDURSBXi:
1162  case AArch64::LDURSHXi:
1163  case AArch64::LDURSWi:
1164  case AArch64::STURXi:
1165  case AArch64::LDURXi:
1166  case AArch64::LDTRSBXi:
1167  case AArch64::LDTRSHXi:
1168  case AArch64::LDTRSWi:
1169  case AArch64::STTRXi:
1170  case AArch64::LDTRXi:
1171  case AArch64::LDRSBXpre:
1172  case AArch64::LDRSHXpre:
1173  case AArch64::STRXpre:
1174  case AArch64::LDRSWpre:
1175  case AArch64::LDRXpre:
1176  case AArch64::LDRSBXpost:
1177  case AArch64::LDRSHXpost:
1178  case AArch64::STRXpost:
1179  case AArch64::LDRSWpost:
1180  case AArch64::LDRXpost:
1181  case AArch64::LDAPURSWi:
1182  case AArch64::LDAPURSHXi:
1183  case AArch64::LDAPURSBXi:
1184  case AArch64::STLURXi:
1185  case AArch64::LDAPURXi:
1186  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1187  break;
1188  case AArch64::LDURQi:
1189  case AArch64::STURQi:
1190  case AArch64::LDRQpre:
1191  case AArch64::STRQpre:
1192  case AArch64::LDRQpost:
1193  case AArch64::STRQpost:
1194  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1195  break;
1196  case AArch64::LDURDi:
1197  case AArch64::STURDi:
1198  case AArch64::LDRDpre:
1199  case AArch64::STRDpre:
1200  case AArch64::LDRDpost:
1201  case AArch64::STRDpost:
1202  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1203  break;
1204  case AArch64::LDURSi:
1205  case AArch64::STURSi:
1206  case AArch64::LDRSpre:
1207  case AArch64::STRSpre:
1208  case AArch64::LDRSpost:
1209  case AArch64::STRSpost:
1210  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1211  break;
1212  case AArch64::LDURHi:
1213  case AArch64::STURHi:
1214  case AArch64::LDRHpre:
1215  case AArch64::STRHpre:
1216  case AArch64::LDRHpost:
1217  case AArch64::STRHpost:
1218  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1219  break;
1220  case AArch64::LDURBi:
1221  case AArch64::STURBi:
1222  case AArch64::LDRBpre:
1223  case AArch64::STRBpre:
1224  case AArch64::LDRBpost:
1225  case AArch64::STRBpost:
1226  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1227  break;
1228  }
1229 
1230  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1231  Inst.addOperand(MCOperand::createImm(offset));
1232 
1233  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1234  bool IsIndexed = fieldFromInstruction(insn, 10, 2) != 0;
1235  bool IsFP = fieldFromInstruction(insn, 26, 1);
1236 
1237  // Cannot write back to a transfer register (but xzr != sp).
1238  if (IsLoad && IsIndexed && !IsFP && Rn != 31 && Rt == Rn)
1239  return SoftFail;
1240 
1241  return Success;
1242 }
1243 
1244 static DecodeStatus
1245 DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
1246  const MCDisassembler *Decoder) {
1247  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1248  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1249  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1250  unsigned Rs = fieldFromInstruction(insn, 16, 5);
1251 
1252  unsigned Opcode = Inst.getOpcode();
1253  switch (Opcode) {
1254  default:
1255  return Fail;
1256  case AArch64::STLXRW:
1257  case AArch64::STLXRB:
1258  case AArch64::STLXRH:
1259  case AArch64::STXRW:
1260  case AArch64::STXRB:
1261  case AArch64::STXRH:
1262  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1263  [[fallthrough]];
1264  case AArch64::LDARW:
1265  case AArch64::LDARB:
1266  case AArch64::LDARH:
1267  case AArch64::LDAXRW:
1268  case AArch64::LDAXRB:
1269  case AArch64::LDAXRH:
1270  case AArch64::LDXRW:
1271  case AArch64::LDXRB:
1272  case AArch64::LDXRH:
1273  case AArch64::STLRW:
1274  case AArch64::STLRB:
1275  case AArch64::STLRH:
1276  case AArch64::STLLRW:
1277  case AArch64::STLLRB:
1278  case AArch64::STLLRH:
1279  case AArch64::LDLARW:
1280  case AArch64::LDLARB:
1281  case AArch64::LDLARH:
1282  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1283  break;
1284  case AArch64::STLXRX:
1285  case AArch64::STXRX:
1286  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1287  [[fallthrough]];
1288  case AArch64::LDARX:
1289  case AArch64::LDAXRX:
1290  case AArch64::LDXRX:
1291  case AArch64::STLRX:
1292  case AArch64::LDLARX:
1293  case AArch64::STLLRX:
1294  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1295  break;
1296  case AArch64::STLXPW:
1297  case AArch64::STXPW:
1298  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1299  [[fallthrough]];
1300  case AArch64::LDAXPW:
1301  case AArch64::LDXPW:
1302  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1303  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1304  break;
1305  case AArch64::STLXPX:
1306  case AArch64::STXPX:
1307  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1308  [[fallthrough]];
1309  case AArch64::LDAXPX:
1310  case AArch64::LDXPX:
1311  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1312  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1313  break;
1314  }
1315 
1316  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1317 
1318  // You shouldn't load to the same register twice in an instruction...
1319  if ((Opcode == AArch64::LDAXPW || Opcode == AArch64::LDXPW ||
1320  Opcode == AArch64::LDAXPX || Opcode == AArch64::LDXPX) &&
1321  Rt == Rt2)
1322  return SoftFail;
1323 
1324  return Success;
1325 }
1326 
1327 static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn,
1328  uint64_t Addr,
1329  const MCDisassembler *Decoder) {
1330  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1331  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1332  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1333  int64_t offset = fieldFromInstruction(insn, 15, 7);
1334  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1335 
1336  // offset is a 7-bit signed immediate, so sign extend it to
1337  // fill the unsigned.
1338  if (offset & (1 << (7 - 1)))
1339  offset |= ~((1LL << 7) - 1);
1340 
1341  unsigned Opcode = Inst.getOpcode();
1342  bool NeedsDisjointWritebackTransfer = false;
1343 
1344  // First operand is always writeback of base register.
1345  switch (Opcode) {
1346  default:
1347  break;
1348  case AArch64::LDPXpost:
1349  case AArch64::STPXpost:
1350  case AArch64::LDPSWpost:
1351  case AArch64::LDPXpre:
1352  case AArch64::STPXpre:
1353  case AArch64::LDPSWpre:
1354  case AArch64::LDPWpost:
1355  case AArch64::STPWpost:
1356  case AArch64::LDPWpre:
1357  case AArch64::STPWpre:
1358  case AArch64::LDPQpost:
1359  case AArch64::STPQpost:
1360  case AArch64::LDPQpre:
1361  case AArch64::STPQpre:
1362  case AArch64::LDPDpost:
1363  case AArch64::STPDpost:
1364  case AArch64::LDPDpre:
1365  case AArch64::STPDpre:
1366  case AArch64::LDPSpost:
1367  case AArch64::STPSpost:
1368  case AArch64::LDPSpre:
1369  case AArch64::STPSpre:
1370  case AArch64::STGPpre:
1371  case AArch64::STGPpost:
1372  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1373  break;
1374  }
1375 
1376  switch (Opcode) {
1377  default:
1378  return Fail;
1379  case AArch64::LDPXpost:
1380  case AArch64::STPXpost:
1381  case AArch64::LDPSWpost:
1382  case AArch64::LDPXpre:
1383  case AArch64::STPXpre:
1384  case AArch64::LDPSWpre:
1385  case AArch64::STGPpre:
1386  case AArch64::STGPpost:
1387  NeedsDisjointWritebackTransfer = true;
1388  [[fallthrough]];
1389  case AArch64::LDNPXi:
1390  case AArch64::STNPXi:
1391  case AArch64::LDPXi:
1392  case AArch64::STPXi:
1393  case AArch64::LDPSWi:
1394  case AArch64::STGPi:
1395  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1396  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1397  break;
1398  case AArch64::LDPWpost:
1399  case AArch64::STPWpost:
1400  case AArch64::LDPWpre:
1401  case AArch64::STPWpre:
1402  NeedsDisjointWritebackTransfer = true;
1403  [[fallthrough]];
1404  case AArch64::LDNPWi:
1405  case AArch64::STNPWi:
1406  case AArch64::LDPWi:
1407  case AArch64::STPWi:
1408  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1409  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1410  break;
1411  case AArch64::LDNPQi:
1412  case AArch64::STNPQi:
1413  case AArch64::LDPQpost:
1414  case AArch64::STPQpost:
1415  case AArch64::LDPQi:
1416  case AArch64::STPQi:
1417  case AArch64::LDPQpre:
1418  case AArch64::STPQpre:
1419  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1420  DecodeFPR128RegisterClass(Inst, Rt2, Addr, Decoder);
1421  break;
1422  case AArch64::LDNPDi:
1423  case AArch64::STNPDi:
1424  case AArch64::LDPDpost:
1425  case AArch64::STPDpost:
1426  case AArch64::LDPDi:
1427  case AArch64::STPDi:
1428  case AArch64::LDPDpre:
1429  case AArch64::STPDpre:
1430  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1431  DecodeFPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1432  break;
1433  case AArch64::LDNPSi:
1434  case AArch64::STNPSi:
1435  case AArch64::LDPSpost:
1436  case AArch64::STPSpost:
1437  case AArch64::LDPSi:
1438  case AArch64::STPSi:
1439  case AArch64::LDPSpre:
1440  case AArch64::STPSpre:
1441  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1442  DecodeFPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1443  break;
1444  }
1445 
1446  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1447  Inst.addOperand(MCOperand::createImm(offset));
1448 
1449  // You shouldn't load to the same register twice in an instruction...
1450  if (IsLoad && Rt == Rt2)
1451  return SoftFail;
1452 
1453  // ... or do any operation that writes-back to a transfer register. But note
1454  // that "stp xzr, xzr, [sp], #4" is fine because xzr and sp are different.
1455  if (NeedsDisjointWritebackTransfer && Rn != 31 && (Rt == Rn || Rt2 == Rn))
1456  return SoftFail;
1457 
1458  return Success;
1459 }
1460 
1461 static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn,
1462  uint64_t Addr,
1463  const MCDisassembler *Decoder) {
1464  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1465  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1466  uint64_t offset = fieldFromInstruction(insn, 22, 1) << 9 |
1467  fieldFromInstruction(insn, 12, 9);
1468  unsigned writeback = fieldFromInstruction(insn, 11, 1);
1469 
1470  switch (Inst.getOpcode()) {
1471  default:
1472  return Fail;
1473  case AArch64::LDRAAwriteback:
1474  case AArch64::LDRABwriteback:
1475  DecodeGPR64spRegisterClass(Inst, Rn /* writeback register */, Addr,
1476  Decoder);
1477  break;
1478  case AArch64::LDRAAindexed:
1479  case AArch64::LDRABindexed:
1480  break;
1481  }
1482 
1483  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1484  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1485  DecodeSImm<10>(Inst, offset, Addr, Decoder);
1486 
1487  if (writeback && Rt == Rn && Rn != 31) {
1488  return SoftFail;
1489  }
1490 
1491  return Success;
1492 }
1493 
1494 static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn,
1495  uint64_t Addr,
1496  const MCDisassembler *Decoder) {
1497  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1498  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1499  unsigned Rm = fieldFromInstruction(insn, 16, 5);
1500  unsigned extend = fieldFromInstruction(insn, 10, 6);
1501 
1502  unsigned shift = extend & 0x7;
1503  if (shift > 4)
1504  return Fail;
1505 
1506  switch (Inst.getOpcode()) {
1507  default:
1508  return Fail;
1509  case AArch64::ADDWrx:
1510  case AArch64::SUBWrx:
1511  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1512  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1513  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1514  break;
1515  case AArch64::ADDSWrx:
1516  case AArch64::SUBSWrx:
1517  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1518  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1519  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1520  break;
1521  case AArch64::ADDXrx:
1522  case AArch64::SUBXrx:
1523  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1524  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1525  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1526  break;
1527  case AArch64::ADDSXrx:
1528  case AArch64::SUBSXrx:
1529  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1530  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1531  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1532  break;
1533  case AArch64::ADDXrx64:
1534  case AArch64::SUBXrx64:
1535  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1536  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1537  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1538  break;
1539  case AArch64::SUBSXrx64:
1540  case AArch64::ADDSXrx64:
1541  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1542  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1543  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1544  break;
1545  }
1546 
1547  Inst.addOperand(MCOperand::createImm(extend));
1548  return Success;
1549 }
1550 
1551 static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn,
1552  uint64_t Addr,
1553  const MCDisassembler *Decoder) {
1554  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1555  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1556  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1557  unsigned imm;
1558 
1559  if (Datasize) {
1560  if (Inst.getOpcode() == AArch64::ANDSXri)
1561  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1562  else
1563  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1564  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
1565  imm = fieldFromInstruction(insn, 10, 13);
1566  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1567  return Fail;
1568  } else {
1569  if (Inst.getOpcode() == AArch64::ANDSWri)
1570  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1571  else
1572  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1573  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
1574  imm = fieldFromInstruction(insn, 10, 12);
1575  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 32))
1576  return Fail;
1577  }
1578  Inst.addOperand(MCOperand::createImm(imm));
1579  return Success;
1580 }
1581 
1582 static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn,
1583  uint64_t Addr,
1584  const MCDisassembler *Decoder) {
1585  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1586  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1587  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1588  imm |= fieldFromInstruction(insn, 5, 5);
1589 
1590  if (Inst.getOpcode() == AArch64::MOVID)
1591  DecodeFPR64RegisterClass(Inst, Rd, Addr, Decoder);
1592  else
1593  DecodeFPR128RegisterClass(Inst, Rd, Addr, Decoder);
1594 
1595  Inst.addOperand(MCOperand::createImm(imm));
1596 
1597  switch (Inst.getOpcode()) {
1598  default:
1599  break;
1600  case AArch64::MOVIv4i16:
1601  case AArch64::MOVIv8i16:
1602  case AArch64::MVNIv4i16:
1603  case AArch64::MVNIv8i16:
1604  case AArch64::MOVIv2i32:
1605  case AArch64::MOVIv4i32:
1606  case AArch64::MVNIv2i32:
1607  case AArch64::MVNIv4i32:
1608  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1609  break;
1610  case AArch64::MOVIv2s_msl:
1611  case AArch64::MOVIv4s_msl:
1612  case AArch64::MVNIv2s_msl:
1613  case AArch64::MVNIv4s_msl:
1614  Inst.addOperand(MCOperand::createImm((cmode & 1) ? 0x110 : 0x108));
1615  break;
1616  }
1617 
1618  return Success;
1619 }
1620 
1621 static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn,
1622  uint64_t Addr,
1623  const MCDisassembler *Decoder) {
1624  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1625  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1626  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1627  imm |= fieldFromInstruction(insn, 5, 5);
1628 
1629  // Tied operands added twice.
1630  DecodeFPR128RegisterClass(Inst, Rd, Addr, Decoder);
1631  DecodeFPR128RegisterClass(Inst, Rd, Addr, Decoder);
1632 
1633  Inst.addOperand(MCOperand::createImm(imm));
1634  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1635 
1636  return Success;
1637 }
1638 
1639 static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn,
1640  uint64_t Addr,
1641  const MCDisassembler *Decoder) {
1642  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1643  int64_t imm = fieldFromInstruction(insn, 5, 19) << 2;
1644  imm |= fieldFromInstruction(insn, 29, 2);
1645 
1646  // Sign-extend the 21-bit immediate.
1647  if (imm & (1 << (21 - 1)))
1648  imm |= ~((1LL << 21) - 1);
1649 
1650  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1651  if (!Decoder->tryAddingSymbolicOperand(Inst, imm, Addr, Fail, 0, 0, 4))
1652  Inst.addOperand(MCOperand::createImm(imm));
1653 
1654  return Success;
1655 }
1656 
1657 static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn,
1658  uint64_t Addr,
1659  const MCDisassembler *Decoder) {
1660  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1661  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1662  unsigned Imm = fieldFromInstruction(insn, 10, 14);
1663  unsigned S = fieldFromInstruction(insn, 29, 1);
1664  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1665 
1666  unsigned ShifterVal = (Imm >> 12) & 3;
1667  unsigned ImmVal = Imm & 0xFFF;
1668 
1669  if (ShifterVal != 0 && ShifterVal != 1)
1670  return Fail;
1671 
1672  if (Datasize) {
1673  if (Rd == 31 && !S)
1674  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1675  else
1676  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1677  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1678  } else {
1679  if (Rd == 31 && !S)
1680  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1681  else
1682  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1683  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1684  }
1685 
1686  if (!Decoder->tryAddingSymbolicOperand(Inst, Imm, Addr, Fail, 0, 0, 4))
1687  Inst.addOperand(MCOperand::createImm(ImmVal));
1688  Inst.addOperand(MCOperand::createImm(12 * ShifterVal));
1689  return Success;
1690 }
1691 
1692 static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn,
1693  uint64_t Addr,
1694  const MCDisassembler *Decoder) {
1695  int64_t imm = fieldFromInstruction(insn, 0, 26);
1696 
1697  // Sign-extend the 26-bit immediate.
1698  if (imm & (1 << (26 - 1)))
1699  imm |= ~((1LL << 26) - 1);
1700 
1701  if (!Decoder->tryAddingSymbolicOperand(Inst, imm * 4, Addr, true, 0, 0, 4))
1702  Inst.addOperand(MCOperand::createImm(imm));
1703 
1704  return Success;
1705 }
1706 
1707 static DecodeStatus
1708 DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
1709  const MCDisassembler *Decoder) {
1710  uint64_t op1 = fieldFromInstruction(insn, 16, 3);
1711  uint64_t op2 = fieldFromInstruction(insn, 5, 3);
1712  uint64_t crm = fieldFromInstruction(insn, 8, 4);
1713  uint64_t pstate_field = (op1 << 3) | op2;
1714 
1715  switch (pstate_field) {
1716  case 0x01: // XAFlag
1717  case 0x02: // AXFlag
1718  return Fail;
1719  }
1720 
1721  if ((pstate_field == AArch64PState::PAN ||
1722  pstate_field == AArch64PState::UAO ||
1723  pstate_field == AArch64PState::SSBS) && crm > 1)
1724  return Fail;
1725 
1726  Inst.addOperand(MCOperand::createImm(pstate_field));
1727  Inst.addOperand(MCOperand::createImm(crm));
1728 
1729  auto PState = AArch64PState::lookupPStateByEncoding(pstate_field);
1730  if (PState &&
1731  PState->haveFeatures(Decoder->getSubtargetInfo().getFeatureBits()))
1732  return Success;
1733  return Fail;
1734 }
1735 
1736 static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn,
1737  uint64_t Addr,
1738  const MCDisassembler *Decoder) {
1739  uint64_t Rt = fieldFromInstruction(insn, 0, 5);
1740  uint64_t bit = fieldFromInstruction(insn, 31, 1) << 5;
1741  bit |= fieldFromInstruction(insn, 19, 5);
1742  int64_t dst = fieldFromInstruction(insn, 5, 14);
1743 
1744  // Sign-extend 14-bit immediate.
1745  if (dst & (1 << (14 - 1)))
1746  dst |= ~((1LL << 14) - 1);
1747 
1748  if (fieldFromInstruction(insn, 31, 1) == 0)
1749  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1750  else
1751  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1752  Inst.addOperand(MCOperand::createImm(bit));
1753  if (!Decoder->tryAddingSymbolicOperand(Inst, dst * 4, Addr, true, 0, 0, 4))
1754  Inst.addOperand(MCOperand::createImm(dst));
1755 
1756  return Success;
1757 }
1758 
1759 static DecodeStatus
1760 DecodeGPRSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegClassID,
1761  unsigned RegNo, uint64_t Addr,
1762  const MCDisassembler *Decoder) {
1763  // Register number must be even (see CASP instruction)
1764  if (RegNo & 0x1)
1765  return Fail;
1766 
1767  unsigned Reg = AArch64MCRegisterClasses[RegClassID].getRegister(RegNo / 2);
1768  Inst.addOperand(MCOperand::createReg(Reg));
1769  return Success;
1770 }
1771 
1772 static DecodeStatus
1773 DecodeWSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
1774  const MCDisassembler *Decoder) {
1775  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1776  AArch64::WSeqPairsClassRegClassID,
1777  RegNo, Addr, Decoder);
1778 }
1779 
1780 static DecodeStatus
1781 DecodeXSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr,
1782  const MCDisassembler *Decoder) {
1783  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1784  AArch64::XSeqPairsClassRegClassID,
1785  RegNo, Addr, Decoder);
1786 }
1787 
1788 static DecodeStatus
1789 DecodeSVELogicalImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr,
1790  const MCDisassembler *Decoder) {
1791  unsigned Zdn = fieldFromInstruction(insn, 0, 5);
1792  unsigned imm = fieldFromInstruction(insn, 5, 13);
1793  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1794  return Fail;
1795 
1796  // The same (tied) operand is added twice to the instruction.
1797  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1798  if (Inst.getOpcode() != AArch64::DUPM_ZI)
1799  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1800  Inst.addOperand(MCOperand::createImm(imm));
1801  return Success;
1802 }
1803 
1804 template <int Bits>
1805 static DecodeStatus DecodeSImm(MCInst &Inst, uint64_t Imm, uint64_t Address,
1806  const MCDisassembler *Decoder) {
1807  if (Imm & ~((1LL << Bits) - 1))
1808  return Fail;
1809 
1810  // Imm is a signed immediate, so sign extend it.
1811  if (Imm & (1 << (Bits - 1)))
1812  Imm |= ~((1LL << Bits) - 1);
1813 
1814  Inst.addOperand(MCOperand::createImm(Imm));
1815  return Success;
1816 }
1817 
1818 // Decode 8-bit signed/unsigned immediate for a given element width.
1819 template <int ElementWidth>
1820 static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm, uint64_t Addr,
1821  const MCDisassembler *Decoder) {
1822  unsigned Val = (uint8_t)Imm;
1823  unsigned Shift = (Imm & 0x100) ? 8 : 0;
1824  if (ElementWidth == 8 && Shift)
1825  return Fail;
1826  Inst.addOperand(MCOperand::createImm(Val));
1827  Inst.addOperand(MCOperand::createImm(Shift));
1828  return Success;
1829 }
1830 
1831 // Decode uimm4 ranged from 1-16.
1832 static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm,
1833  uint64_t Addr,
1834  const MCDisassembler *Decoder) {
1835  Inst.addOperand(MCOperand::createImm(Imm + 1));
1836  return Success;
1837 }
1838 
1839 static DecodeStatus DecodeSVCROp(MCInst &Inst, unsigned Imm, uint64_t Address,
1840  const MCDisassembler *Decoder) {
1841  if (AArch64SVCR::lookupSVCRByEncoding(Imm)) {
1842  Inst.addOperand(MCOperand::createImm(Imm));
1843  return Success;
1844  }
1845  return Fail;
1846 }
1847 
1848 static DecodeStatus DecodeCPYMemOpInstruction(MCInst &Inst, uint32_t insn,
1849  uint64_t Addr,
1850  const MCDisassembler *Decoder) {
1851  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1852  unsigned Rs = fieldFromInstruction(insn, 16, 5);
1853  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1854 
1855  // None of the registers may alias: if they do, then the instruction is not
1856  // merely unpredictable but actually entirely unallocated.
1857  if (Rd == Rs || Rs == Rn || Rd == Rn)
1858  return MCDisassembler::Fail;
1859 
1860  // All three register operands are written back, so they all appear
1861  // twice in the operand list, once as outputs and once as inputs.
1862  if (!DecodeGPR64commonRegisterClass(Inst, Rd, Addr, Decoder) ||
1863  !DecodeGPR64commonRegisterClass(Inst, Rs, Addr, Decoder) ||
1864  !DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder) ||
1865  !DecodeGPR64commonRegisterClass(Inst, Rd, Addr, Decoder) ||
1866  !DecodeGPR64commonRegisterClass(Inst, Rs, Addr, Decoder) ||
1867  !DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder))
1868  return MCDisassembler::Fail;
1869 
1870  return MCDisassembler::Success;
1871 }
1872 
1873 static DecodeStatus DecodeSETMemOpInstruction(MCInst &Inst, uint32_t insn,
1874  uint64_t Addr,
1875  const MCDisassembler *Decoder) {
1876  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1877  unsigned Rm = fieldFromInstruction(insn, 16, 5);
1878  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1879 
1880  // None of the registers may alias: if they do, then the instruction is not
1881  // merely unpredictable but actually entirely unallocated.
1882  if (Rd == Rm || Rm == Rn || Rd == Rn)
1883  return MCDisassembler::Fail;
1884 
1885  // Rd and Rn (not Rm) register operands are written back, so they appear
1886  // twice in the operand list, once as outputs and once as inputs.
1887  if (!DecodeGPR64commonRegisterClass(Inst, Rd, Addr, Decoder) ||
1888  !DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder) ||
1889  !DecodeGPR64commonRegisterClass(Inst, Rd, Addr, Decoder) ||
1890  !DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder) ||
1891  !DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder))
1892  return MCDisassembler::Fail;
1893 
1894  return MCDisassembler::Success;
1895 }
llvm::AArch64Disassembler::suggestBytesToSkip
uint64_t suggestBytesToSkip(ArrayRef< uint8_t > Bytes, uint64_t Address) const override
Suggest a distance to skip in a buffer of data to find the next place to look for the start of an ins...
Definition: AArch64Disassembler.cpp:353
DecodeGPRSeqPairsClassRegisterClass
static DecodeStatus DecodeGPRSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegClassID, unsigned RegNo, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1760
i
i
Definition: README.txt:29
DecodeFPR128RegisterClass
static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:394
DecodeAddSubImmShift
static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1657
DecodeModImmInstruction
static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1582
createAArch64Disassembler
static MCDisassembler * createAArch64Disassembler(const Target &T, const MCSubtargetInfo &STI, MCContext &Ctx)
Definition: AArch64Disassembler.cpp:284
MI
IRTranslator LLVM IR MI
Definition: IRTranslator.cpp:108
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
DecodeDDRegisterClass
static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:701
DecodeSImm
static DecodeStatus DecodeSImm(MCInst &Inst, uint64_t Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1805
DecodeQQQQRegisterClass
static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:690
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:1789
DecodeZPR2RegisterClass
static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:579
DecodeAuthLoadInstruction
static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1461
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:1181
LLVMInitializeAArch64Disassembler
LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64Disassembler()
Definition: AArch64Disassembler.cpp:370
ErrorHandling.h
DecodeDDDRegisterClass
static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:712
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:463
DecodeSystemPStateInstruction
static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1708
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:28
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:438
DecodeVecShiftL32Imm
static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:874
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:646
llvm::AArch64::OPERAND_IMPLICIT_IMM_0
@ OPERAND_IMPLICIT_IMM_0
Definition: AArch64MCTargetDesc.h:72
createAArch64ExternalSymbolizer
static MCSymbolizer * createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo, LLVMSymbolLookupCallback SymbolLookUp, void *DisInfo, MCContext *Ctx, std::unique_ptr< MCRelocationInfo > &&RelInfo)
Definition: AArch64Disassembler.cpp:362
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:773
AArch64Disassembler.h
DecodeVecShiftR32ImmNarrow
static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:844
DecodeVecShiftR16ImmNarrow
static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:856
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:551
DecodeVecShiftLImm
static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm, unsigned Add)
Definition: AArch64Disassembler.cpp:820
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:750
DecodeVecShiftL8Imm
static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:886
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:1551
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:623
DecodeTestAndBranch
static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1736
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:414
DecodeModImmTiedInstruction
static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1621
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:601
SoftFail
#define SoftFail
Definition: AArch64Disassembler.cpp:282
DecodeMSRSystemRegister
static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:783
llvm::MCDisassembler::CommentStream
raw_ostream * CommentStream
Definition: MCDisassembler.h:223
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:52
DecodeVecShiftR16Imm
static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:850
DecodeMatrixTileListRegisterClass
static DecodeStatus DecodeMatrixTileListRegisterClass(MCInst &Inst, unsigned RegMask, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:613
DecodeThreeAddrSRegInstruction
static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:893
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:1327
llvm::MCDisassembler::DecodeStatus
DecodeStatus
Ternary decode status.
Definition: MCDisassembler.h:109
llvm::MCDisassembler::STI
const MCSubtargetInfo & STI
Definition: MCDisassembler.h:202
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:880
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:127
DecodeVecShiftR8Imm
static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:862
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:814
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:826
MCRegisterInfo.h
DecodeFixedPointScaleImm32
static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:734
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:488
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:571
DecodeQQQRegisterClass
static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:679
DecodeFPR128_loRegisterClass
static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:407
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:1692
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:514
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::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:1639
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:743
DecodeQQRegisterClass
static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:668
DecodeGPR32spRegisterClass
static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:539
Insn
SmallVector< AArch64_IMM::ImmInsnModel, 4 > Insn
Definition: AArch64MIPeepholeOpt.cpp:130
DecodeSignedLdStInstruction
static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1046
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:426
DecodeVecShiftR64ImmNarrow
static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:832
Success
#define Success
Definition: AArch64Disassembler.cpp:280
DecodeGPR32RegisterClass
static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:527
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:1494
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:635
DecodeZPR3RegisterClass
static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:590
AArch64MCTargetDesc.h
DecodeExclusiveLdStInstruction
static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1245
llvm::MCDisassembler::getSubtargetInfo
const MCSubtargetInfo & getSubtargetInfo() const
Definition: MCDisassembler.h:219
DecodeGPR64spRegisterClass
static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:502
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:791
DecodeDDDDRegisterClass
static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:723
DecodeXSeqPairsClassRegisterClass
static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1781
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:1820
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:563
llvm::AArch64Disassembler
Definition: AArch64Disassembler.h:20
DecodeFPR8RegisterClass
static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:450
DecodeWSeqPairsClassRegisterClass
static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1773
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:954
DecodePPR_3bRegisterClass
static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:658
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:838
DecodeGPR64RegisterClass
static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:475
TargetRegistry.h
DecodeSVCROp
static DecodeStatus DecodeSVCROp(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1839
DecodeVecShiftL64Imm
static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:868
DecodeSETMemOpInstruction
static DecodeStatus DecodeSETMemOpInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1873
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:988
DecodeMemExtend
static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm, uint64_t Address, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:765
DecodeSVEIncDecImm
static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1832
AArch64TargetInfo.h
DecodeCPYMemOpInstruction
static DecodeStatus DecodeCPYMemOpInstruction(MCInst &Inst, uint32_t insn, uint64_t Addr, const MCDisassembler *Decoder)
Definition: AArch64Disassembler.cpp:1848
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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