LLVM  14.0.0git
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/MCDisassembler/MCRelocationInfo.h"
20 #include "llvm/MC/MCFixedLenDisassembler.h"
21 #include "llvm/MC/MCInst.h"
22 #include "llvm/MC/MCRegisterInfo.h"
23 #include "llvm/MC/MCSubtargetInfo.h"
24 #include "llvm/MC/TargetRegistry.h"
25 #include "llvm/Support/Compiler.h"
26 #include "llvm/Support/Debug.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include <algorithm>
29 #include <memory>
30 
31 using namespace llvm;
32 
33 #define DEBUG_TYPE "aarch64-disassembler"
34 
35 // Pull DecodeStatus and its enum values into the global namespace.
36 using DecodeStatus = MCDisassembler::DecodeStatus;
37 
38 // Forward declare these because the autogenerated code will reference them.
39 // Definitions are further down.
40 static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst,
41  unsigned RegNo, uint64_t Address,
42  const void *Decoder);
43 static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst,
44  unsigned RegNo,
45  uint64_t Address,
46  const void *Decoder);
47 static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo,
48  uint64_t Address,
49  const void *Decoder);
50 static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo,
51  uint64_t Address,
52  const void *Decoder);
53 static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo,
54  uint64_t Address,
55  const void *Decoder);
56 static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo,
57  uint64_t Address,
58  const void *Decoder);
59 static DecodeStatus DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo,
60  uint64_t Address,
61  const void *Decoder);
62 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo,
63  uint64_t Address,
64  const void *Decoder);
65 static DecodeStatus DecodeGPR64x8ClassRegisterClass(MCInst &Inst,
66  unsigned RegNo,
67  uint64_t Address,
68  const void *Decoder);
69 static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst,
70  unsigned RegNo, uint64_t Address,
71  const void *Decoder);
72 static DecodeStatus DecodeMatrixIndexGPR32_12_15RegisterClass(MCInst &Inst,
73  unsigned RegNo,
74  uint64_t Address,
75  const void *Decoder);
76 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo,
77  uint64_t Address,
78  const void *Decoder);
79 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst,
80  unsigned RegNo, uint64_t Address,
81  const void *Decoder);
82 static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo,
83  uint64_t Address,
84  const void *Decoder);
85 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo,
86  uint64_t Address,
87  const void *Decoder);
88 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo,
89  uint64_t Address,
90  const void *Decoder);
91 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo,
92  uint64_t Address,
93  const void *Decoder);
94 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo,
95  uint64_t Address,
96  const void *Decoder);
97 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo,
98  uint64_t Address,
99  const void *Decoder);
100 static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo,
101  uint64_t Address,
102  const void *Decoder);
103 static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo,
104  uint64_t Address,
105  const void *Decoder);
106 static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
107  uint64_t Address,
108  const void *Decoder);
109 static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo,
110  uint64_t Address,
111  const void *Decoder);
112 static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo,
113  uint64_t Address,
114  const void *Decoder);
115 static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo,
116  uint64_t Address,
117  const void *Decoder);
118 template <unsigned NumBitsForTile>
119 static DecodeStatus DecodeMatrixTile(MCInst &Inst, unsigned RegNo,
120  uint64_t Address, const void *Decoder);
121 static DecodeStatus DecodeMatrixTileListRegisterClass(MCInst &Inst,
122  unsigned RegMask,
123  uint64_t Address,
124  const void *Decoder);
125 static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo,
126  uint64_t Address,
127  const void *Decoder);
128 static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
129  uint64_t Address,
130  const void *Decoder);
131 
132 static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm,
133  uint64_t Address,
134  const void *Decoder);
135 static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm,
136  uint64_t Address,
137  const void *Decoder);
138 static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm,
139  uint64_t Address, const void *Decoder);
140 static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm,
141  uint64_t Address, const void *Decoder);
142 static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm,
143  uint64_t Address, const void *Decoder);
144 static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm,
145  uint64_t Address, const void *Decoder);
146 static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn,
147  uint64_t Address,
148  const void *Decoder);
149 static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn,
150  uint64_t Address,
151  const void *Decoder);
152 static DecodeStatus DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn,
153  uint64_t Address,
154  const void *Decoder);
155 static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn,
156  uint64_t Address,
157  const void *Decoder);
158 static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn,
159  uint64_t Address,
160  const void *Decoder);
161 static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn,
162  uint64_t Address,
163  const void *Decoder);
164 static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn,
165  uint64_t Address,
166  const void *Decoder);
167 static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn,
168  uint64_t Address,
169  const void *Decoder);
170 static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn,
171  uint64_t Address,
172  const void *Decoder);
173 static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn,
174  uint64_t Address,
175  const void *Decoder);
176 static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn,
177  uint64_t Address,
178  const void *Decoder);
179 static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn,
180  uint64_t Address, const void *Decoder);
181 static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn,
182  uint64_t Address, const void *Decoder);
183 static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn,
184  uint64_t Address,
185  const void *Decoder);
186 static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn,
187  uint64_t Address,
188  const void *Decoder);
189 static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn,
190  uint64_t Address, const void *Decoder);
191 
192 static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn,
193  uint64_t Address,
194  const void *Decoder);
195 static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm,
196  uint64_t Addr, const void *Decoder);
197 static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm,
198  uint64_t Addr,
199  const void *Decoder);
200 static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm,
201  uint64_t Addr, const void *Decoder);
202 static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm,
203  uint64_t Addr,
204  const void *Decoder);
205 static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm,
206  uint64_t Addr, const void *Decoder);
207 static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm,
208  uint64_t Addr,
209  const void *Decoder);
210 static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm,
211  uint64_t Addr, const void *Decoder);
212 static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm,
213  uint64_t Addr, const void *Decoder);
214 static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm,
215  uint64_t Addr, const void *Decoder);
216 static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm,
217  uint64_t Addr, const void *Decoder);
218 static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm,
219  uint64_t Addr, const void *Decoder);
220 static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst,
221  unsigned RegNo,
222  uint64_t Addr,
223  const void *Decoder);
224 static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst,
225  unsigned RegNo,
226  uint64_t Addr,
227  const void *Decoder);
228 static DecodeStatus DecodeSVELogicalImmInstruction(MCInst &Inst, uint32_t insn,
229  uint64_t Address,
230  const void *Decoder);
231 template <int Bits>
232 static DecodeStatus DecodeSImm(MCInst &Inst, uint64_t Imm, uint64_t Address,
233  const void *Decoder);
234 template <int ElementWidth>
235 static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm,
236  uint64_t Addr, const void *Decoder);
237 static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm,
238  uint64_t Addr, const void *Decoder);
239 static DecodeStatus DecodeSVCROp(MCInst &Inst, unsigned Imm, uint64_t Address,
240  const void *Decoder);
241 
242 static bool Check(DecodeStatus &Out, DecodeStatus In) {
243  switch (In) {
244  case MCDisassembler::Success:
245  // Out stays the same.
246  return true;
247  case MCDisassembler::SoftFail:
248  Out = In;
249  return true;
250  case MCDisassembler::Fail:
251  Out = In;
252  return false;
253  }
254  llvm_unreachable("Invalid DecodeStatus!");
255 }
256 
257 #include "AArch64GenDisassemblerTables.inc"
258 #include "AArch64GenInstrInfo.inc"
259 
260 #define Success MCDisassembler::Success
261 #define Fail MCDisassembler::Fail
262 #define SoftFail MCDisassembler::SoftFail
263 
264 static MCDisassembler *createAArch64Disassembler(const Target &T,
265  const MCSubtargetInfo &STI,
266  MCContext &Ctx) {
267  return new AArch64Disassembler(STI, Ctx);
268 }
269 
270 DecodeStatus AArch64Disassembler::getInstruction(MCInst &MI, uint64_t &Size,
271  ArrayRef<uint8_t> Bytes,
272  uint64_t Address,
273  raw_ostream &CS) const {
274  CommentStream = &CS;
275 
276  Size = 0;
277  // We want to read exactly 4 bytes of data.
278  if (Bytes.size() < 4)
279  return Fail;
280  Size = 4;
281 
282  // Encoded as a small-endian 32-bit word in the stream.
283  uint32_t Insn =
284  (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
285 
286  const uint8_t *Tables[] = {DecoderTable32, DecoderTableFallback32};
287 
288  for (auto Table : Tables) {
289  DecodeStatus Result =
290  decodeInstruction(Table, MI, Insn, Address, this, STI);
291 
292  switch (MI.getOpcode()) {
293  default:
294  break;
295  // For Scalable Matrix Extension (SME) instructions that have an implicit
296  // operand for the accumulator (ZA) which isn't encoded, manually insert
297  // operand.
298  case AArch64::LDR_ZA:
299  case AArch64::STR_ZA: {
300  MI.insert(MI.begin(), MCOperand::createReg(AArch64::ZA));
301  // Spill and fill instructions have a single immediate used for both the
302  // vector select offset and optional memory offset. Replicate the decoded
303  // immediate.
304  const MCOperand &Imm4Op = MI.getOperand(2);
305  assert(Imm4Op.isImm() && "Unexpected operand type!");
306  MI.addOperand(Imm4Op);
307  break;
308  }
309  case AArch64::LD1_MXIPXX_H_B:
310  case AArch64::LD1_MXIPXX_V_B:
311  case AArch64::ST1_MXIPXX_H_B:
312  case AArch64::ST1_MXIPXX_V_B:
313  case AArch64::INSERT_MXIPZ_H_B:
314  case AArch64::INSERT_MXIPZ_V_B:
315  // e.g.
316  // MOVA ZA0<HV>.B[<Ws>, <imm>], <Pg>/M, <Zn>.B
317  // ^ insert implicit 8-bit element tile
318  MI.insert(MI.begin(), MCOperand::createReg(AArch64::ZAB0));
319  break;
320  case AArch64::EXTRACT_ZPMXI_H_B:
321  case AArch64::EXTRACT_ZPMXI_V_B:
322  // MOVA <Zd>.B, <Pg>/M, ZA0<HV>.B[<Ws>, <imm>]
323  // ^ insert implicit 8-bit element tile
324  MI.insert(MI.begin()+2, MCOperand::createReg(AArch64::ZAB0));
325  break;
326  case AArch64::LD1_MXIPXX_H_Q:
327  case AArch64::LD1_MXIPXX_V_Q:
328  case AArch64::ST1_MXIPXX_H_Q:
329  case AArch64::ST1_MXIPXX_V_Q:
330  // 128-bit load/store have implicit zero vector index.
331  MI.insert(MI.begin()+2, MCOperand::createImm(0));
332  break;
333  // 128-bit mova have implicit zero vector index.
334  case AArch64::INSERT_MXIPZ_H_Q:
335  case AArch64::INSERT_MXIPZ_V_Q:
336  MI.insert(MI.begin()+2, MCOperand::createImm(0));
337  break;
338  case AArch64::EXTRACT_ZPMXI_H_Q:
339  case AArch64::EXTRACT_ZPMXI_V_Q:
340  MI.addOperand(MCOperand::createImm(0));
341  break;
342  case AArch64::SMOVvi8to32_idx0:
343  case AArch64::SMOVvi8to64_idx0:
344  case AArch64::SMOVvi16to32_idx0:
345  case AArch64::SMOVvi16to64_idx0:
346  case AArch64::SMOVvi32to64_idx0:
347  case AArch64::UMOVvi8_idx0:
348  case AArch64::UMOVvi16_idx0:
349  case AArch64::UMOVvi32_idx0:
350  case AArch64::UMOVvi64_idx0:
351  MI.addOperand(MCOperand::createImm(0));
352  break;
353  }
354 
355  if (Result != MCDisassembler::Fail)
356  return Result;
357  }
358 
359  return MCDisassembler::Fail;
360 }
361 
362 static MCSymbolizer *
363 createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo,
364  LLVMSymbolLookupCallback SymbolLookUp,
365  void *DisInfo, MCContext *Ctx,
366  std::unique_ptr<MCRelocationInfo> &&RelInfo) {
367  return new AArch64ExternalSymbolizer(*Ctx, std::move(RelInfo), GetOpInfo,
368  SymbolLookUp, DisInfo);
369 }
370 
371 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64Disassembler() {
372  TargetRegistry::RegisterMCDisassembler(getTheAArch64leTarget(),
373  createAArch64Disassembler);
374  TargetRegistry::RegisterMCDisassembler(getTheAArch64beTarget(),
375  createAArch64Disassembler);
376  TargetRegistry::RegisterMCSymbolizer(getTheAArch64leTarget(),
377  createAArch64ExternalSymbolizer);
378  TargetRegistry::RegisterMCSymbolizer(getTheAArch64beTarget(),
379  createAArch64ExternalSymbolizer);
380  TargetRegistry::RegisterMCDisassembler(getTheAArch64_32Target(),
381  createAArch64Disassembler);
382  TargetRegistry::RegisterMCSymbolizer(getTheAArch64_32Target(),
383  createAArch64ExternalSymbolizer);
384 
385  TargetRegistry::RegisterMCDisassembler(getTheARM64Target(),
386  createAArch64Disassembler);
387  TargetRegistry::RegisterMCSymbolizer(getTheARM64Target(),
388  createAArch64ExternalSymbolizer);
389  TargetRegistry::RegisterMCDisassembler(getTheARM64_32Target(),
390  createAArch64Disassembler);
391  TargetRegistry::RegisterMCSymbolizer(getTheARM64_32Target(),
392  createAArch64ExternalSymbolizer);
393 }
394 
395 static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo,
396  uint64_t Addr,
397  const void *Decoder) {
398  if (RegNo > 31)
399  return Fail;
400 
401  unsigned Register =
402  AArch64MCRegisterClasses[AArch64::FPR128RegClassID].getRegister(RegNo);
403  Inst.addOperand(MCOperand::createReg(Register));
404  return Success;
405 }
406 
407 static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo,
408  uint64_t Addr,
409  const void *Decoder) {
410  if (RegNo > 15)
411  return Fail;
412  return DecodeFPR128RegisterClass(Inst, RegNo, Addr, Decoder);
413 }
414 
415 static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo,
416  uint64_t Addr,
417  const void *Decoder) {
418  if (RegNo > 31)
419  return Fail;
420 
421  unsigned Register =
422  AArch64MCRegisterClasses[AArch64::FPR64RegClassID].getRegister(RegNo);
423  Inst.addOperand(MCOperand::createReg(Register));
424  return Success;
425 }
426 
427 static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo,
428  uint64_t Addr,
429  const void *Decoder) {
430  if (RegNo > 31)
431  return Fail;
432 
433  unsigned Register =
434  AArch64MCRegisterClasses[AArch64::FPR32RegClassID].getRegister(RegNo);
435  Inst.addOperand(MCOperand::createReg(Register));
436  return Success;
437 }
438 
439 static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo,
440  uint64_t Addr,
441  const void *Decoder) {
442  if (RegNo > 31)
443  return Fail;
444 
445  unsigned Register =
446  AArch64MCRegisterClasses[AArch64::FPR16RegClassID].getRegister(RegNo);
447  Inst.addOperand(MCOperand::createReg(Register));
448  return Success;
449 }
450 
451 static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo,
452  uint64_t Addr,
453  const void *Decoder) {
454  if (RegNo > 31)
455  return Fail;
456 
457  unsigned Register =
458  AArch64MCRegisterClasses[AArch64::FPR8RegClassID].getRegister(RegNo);
459  Inst.addOperand(MCOperand::createReg(Register));
460  return Success;
461 }
462 
463 static DecodeStatus DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo,
464  uint64_t Addr,
465  const void *Decoder) {
466  if (RegNo > 30)
467  return Fail;
468 
469  unsigned Register =
470  AArch64MCRegisterClasses[AArch64::GPR64commonRegClassID].getRegister(
471  RegNo);
472  Inst.addOperand(MCOperand::createReg(Register));
473  return Success;
474 }
475 
476 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo,
477  uint64_t Addr,
478  const void *Decoder) {
479  if (RegNo > 31)
480  return Fail;
481 
482  unsigned Register =
483  AArch64MCRegisterClasses[AArch64::GPR64RegClassID].getRegister(RegNo);
484  Inst.addOperand(MCOperand::createReg(Register));
485  return Success;
486 }
487 
488 static DecodeStatus DecodeGPR64x8ClassRegisterClass(MCInst &Inst,
489  unsigned RegNo,
490  uint64_t Address,
491  const void *Decoder) {
492  if (RegNo > 22)
493  return Fail;
494  if (RegNo & 1)
495  return Fail;
496 
497  unsigned Register =
498  AArch64MCRegisterClasses[AArch64::GPR64x8ClassRegClassID].getRegister(
499  RegNo >> 1);
500  Inst.addOperand(MCOperand::createReg(Register));
501  return Success;
502 }
503 
504 static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo,
505  uint64_t Addr,
506  const void *Decoder) {
507  if (RegNo > 31)
508  return Fail;
509  unsigned Register =
510  AArch64MCRegisterClasses[AArch64::GPR64spRegClassID].getRegister(RegNo);
511  Inst.addOperand(MCOperand::createReg(Register));
512  return Success;
513 }
514 
515 static DecodeStatus DecodeMatrixIndexGPR32_12_15RegisterClass(MCInst &Inst,
516  unsigned RegNo,
517  uint64_t Addr,
518  const void *Decoder) {
519  if (RegNo > 3)
520  return Fail;
521 
522  unsigned Register =
523  AArch64MCRegisterClasses[AArch64::MatrixIndexGPR32_12_15RegClassID]
524  .getRegister(RegNo);
525  Inst.addOperand(MCOperand::createReg(Register));
526  return Success;
527 }
528 
529 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo,
530  uint64_t Addr,
531  const void *Decoder) {
532  if (RegNo > 31)
533  return Fail;
534 
535  unsigned Register =
536  AArch64MCRegisterClasses[AArch64::GPR32RegClassID].getRegister(RegNo);
537  Inst.addOperand(MCOperand::createReg(Register));
538  return Success;
539 }
540 
541 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo,
542  uint64_t Addr,
543  const void *Decoder) {
544  if (RegNo > 31)
545  return Fail;
546 
547  unsigned Register =
548  AArch64MCRegisterClasses[AArch64::GPR32spRegClassID].getRegister(RegNo);
549  Inst.addOperand(MCOperand::createReg(Register));
550  return Success;
551 }
552 
553 static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo,
554  uint64_t Address,
555  const void* Decoder) {
556  if (RegNo > 31)
557  return Fail;
558 
559  unsigned Register =
560  AArch64MCRegisterClasses[AArch64::ZPRRegClassID].getRegister(RegNo);
561  Inst.addOperand(MCOperand::createReg(Register));
562  return Success;
563 }
564 
565 static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo,
566  uint64_t Address,
567  const void *Decoder) {
568  if (RegNo > 15)
569  return Fail;
570  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
571 }
572 
573 static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
574  uint64_t Address,
575  const void *Decoder) {
576  if (RegNo > 7)
577  return Fail;
578  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
579 }
580 
581 static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo,
582  uint64_t Address,
583  const void* Decoder) {
584  if (RegNo > 31)
585  return Fail;
586  unsigned Register =
587  AArch64MCRegisterClasses[AArch64::ZPR2RegClassID].getRegister(RegNo);
588  Inst.addOperand(MCOperand::createReg(Register));
589  return Success;
590 }
591 
592 static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo,
593  uint64_t Address,
594  const void* Decoder) {
595  if (RegNo > 31)
596  return Fail;
597  unsigned Register =
598  AArch64MCRegisterClasses[AArch64::ZPR3RegClassID].getRegister(RegNo);
599  Inst.addOperand(MCOperand::createReg(Register));
600  return Success;
601 }
602 
603 static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo,
604  uint64_t Address,
605  const void* Decoder) {
606  if (RegNo > 31)
607  return Fail;
608  unsigned Register =
609  AArch64MCRegisterClasses[AArch64::ZPR4RegClassID].getRegister(RegNo);
610  Inst.addOperand(MCOperand::createReg(Register));
611  return Success;
612 }
613 
614 static DecodeStatus DecodeMatrixTileListRegisterClass(MCInst &Inst,
615  unsigned RegMask,
616  uint64_t Address,
617  const void *Decoder) {
618  if (RegMask > 0xFF)
619  return Fail;
620  Inst.addOperand(MCOperand::createImm(RegMask));
621  return Success;
622 }
623 
624 static const SmallVector<SmallVector<unsigned, 16>, 5>
625  MatrixZATileDecoderTable = {
626  {AArch64::ZAB0},
627  {AArch64::ZAH0, AArch64::ZAH1},
628  {AArch64::ZAS0, AArch64::ZAS1, AArch64::ZAS2, AArch64::ZAS3},
629  {AArch64::ZAD0, AArch64::ZAD1, AArch64::ZAD2, AArch64::ZAD3,
630  AArch64::ZAD4, AArch64::ZAD5, AArch64::ZAD6, AArch64::ZAD7},
631  {AArch64::ZAQ0, AArch64::ZAQ1, AArch64::ZAQ2, AArch64::ZAQ3,
632  AArch64::ZAQ4, AArch64::ZAQ5, AArch64::ZAQ6, AArch64::ZAQ7,
633  AArch64::ZAQ8, AArch64::ZAQ9, AArch64::ZAQ10, AArch64::ZAQ11,
634  AArch64::ZAQ12, AArch64::ZAQ13, AArch64::ZAQ14, AArch64::ZAQ15}};
635 
636 template <unsigned NumBitsForTile>
637 static DecodeStatus DecodeMatrixTile(MCInst &Inst, unsigned RegNo,
638  uint64_t Address, const void *Decoder) {
639  unsigned LastReg = (1 << NumBitsForTile) - 1;
640  if (RegNo > LastReg)
641  return Fail;
642  Inst.addOperand(
643  MCOperand::createReg(MatrixZATileDecoderTable[NumBitsForTile][RegNo]));
644  return Success;
645 }
646 
647 static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo,
648  uint64_t Addr, const void *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 void* 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, const void *Decoder) {
670  if (RegNo > 31)
671  return Fail;
672  unsigned Register =
673  AArch64MCRegisterClasses[AArch64::QQRegClassID].getRegister(RegNo);
674  Inst.addOperand(MCOperand::createReg(Register));
675  return Success;
676 }
677 
678 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo,
679  uint64_t Addr, const void *Decoder) {
680  if (RegNo > 31)
681  return Fail;
682  unsigned Register =
683  AArch64MCRegisterClasses[AArch64::QQQRegClassID].getRegister(RegNo);
684  Inst.addOperand(MCOperand::createReg(Register));
685  return Success;
686 }
687 
688 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo,
689  uint64_t Addr,
690  const void *Decoder) {
691  if (RegNo > 31)
692  return Fail;
693  unsigned Register =
694  AArch64MCRegisterClasses[AArch64::QQQQRegClassID].getRegister(RegNo);
695  Inst.addOperand(MCOperand::createReg(Register));
696  return Success;
697 }
698 
699 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo,
700  uint64_t Addr, const void *Decoder) {
701  if (RegNo > 31)
702  return Fail;
703  unsigned Register =
704  AArch64MCRegisterClasses[AArch64::DDRegClassID].getRegister(RegNo);
705  Inst.addOperand(MCOperand::createReg(Register));
706  return Success;
707 }
708 
709 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo,
710  uint64_t Addr, const void *Decoder) {
711  if (RegNo > 31)
712  return Fail;
713  unsigned Register =
714  AArch64MCRegisterClasses[AArch64::DDDRegClassID].getRegister(RegNo);
715  Inst.addOperand(MCOperand::createReg(Register));
716  return Success;
717 }
718 
719 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo,
720  uint64_t Addr,
721  const void *Decoder) {
722  if (RegNo > 31)
723  return Fail;
724  unsigned Register =
725  AArch64MCRegisterClasses[AArch64::DDDDRegClassID].getRegister(RegNo);
726  Inst.addOperand(MCOperand::createReg(Register));
727  return Success;
728 }
729 
730 static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm,
731  uint64_t Addr,
732  const void *Decoder) {
733  // scale{5} is asserted as 1 in tblgen.
734  Imm |= 0x20;
735  Inst.addOperand(MCOperand::createImm(64 - Imm));
736  return Success;
737 }
738 
739 static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm,
740  uint64_t Addr,
741  const void *Decoder) {
742  Inst.addOperand(MCOperand::createImm(64 - Imm));
743  return Success;
744 }
745 
746 static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm,
747  uint64_t Addr, const void *Decoder) {
748  int64_t ImmVal = Imm;
749  const AArch64Disassembler *Dis =
750  static_cast<const AArch64Disassembler *>(Decoder);
751 
752  // Sign-extend 19-bit immediate.
753  if (ImmVal & (1 << (19 - 1)))
754  ImmVal |= ~((1LL << 19) - 1);
755 
756  if (!Dis->tryAddingSymbolicOperand(Inst, ImmVal * 4, Addr,
757  Inst.getOpcode() != AArch64::LDRXl, 0, 4))
758  Inst.addOperand(MCOperand::createImm(ImmVal));
759  return Success;
760 }
761 
762 static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm,
763  uint64_t Address, const void *Decoder) {
764  Inst.addOperand(MCOperand::createImm((Imm >> 1) & 1));
765  Inst.addOperand(MCOperand::createImm(Imm & 1));
766  return Success;
767 }
768 
769 static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm,
770  uint64_t Address,
771  const void *Decoder) {
772  Inst.addOperand(MCOperand::createImm(Imm));
773 
774  // Every system register in the encoding space is valid with the syntax
775  // S<op0>_<op1>_<Cn>_<Cm>_<op2>, so decoding system registers always succeeds.
776  return Success;
777 }
778 
779 static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm,
780  uint64_t Address,
781  const void *Decoder) {
782  Inst.addOperand(MCOperand::createImm(Imm));
783 
784  return Success;
785 }
786 
787 static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn,
788  uint64_t Address,
789  const void *Decoder) {
790  // This decoder exists to add the dummy Lane operand to the MCInst, which must
791  // be 1 in assembly but has no other real manifestation.
792  unsigned Rd = fieldFromInstruction(Insn, 0, 5);
793  unsigned Rn = fieldFromInstruction(Insn, 5, 5);
794  unsigned IsToVec = fieldFromInstruction(Insn, 16, 1);
795 
796  if (IsToVec) {
797  DecodeFPR128RegisterClass(Inst, Rd, Address, Decoder);
798  DecodeGPR64RegisterClass(Inst, Rn, Address, Decoder);
799  } else {
800  DecodeGPR64RegisterClass(Inst, Rd, Address, Decoder);
801  DecodeFPR128RegisterClass(Inst, Rn, Address, Decoder);
802  }
803 
804  // Add the lane
805  Inst.addOperand(MCOperand::createImm(1));
806 
807  return Success;
808 }
809 
810 static DecodeStatus DecodeVecShiftRImm(MCInst &Inst, unsigned Imm,
811  unsigned Add) {
812  Inst.addOperand(MCOperand::createImm(Add - Imm));
813  return Success;
814 }
815 
816 static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm,
817  unsigned Add) {
818  Inst.addOperand(MCOperand::createImm((Imm + Add) & (Add - 1)));
819  return Success;
820 }
821 
822 static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm,
823  uint64_t Addr, const void *Decoder) {
824  return DecodeVecShiftRImm(Inst, Imm, 64);
825 }
826 
827 static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm,
828  uint64_t Addr,
829  const void *Decoder) {
830  return DecodeVecShiftRImm(Inst, Imm | 0x20, 64);
831 }
832 
833 static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm,
834  uint64_t Addr, const void *Decoder) {
835  return DecodeVecShiftRImm(Inst, Imm, 32);
836 }
837 
838 static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm,
839  uint64_t Addr,
840  const void *Decoder) {
841  return DecodeVecShiftRImm(Inst, Imm | 0x10, 32);
842 }
843 
844 static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm,
845  uint64_t Addr, const void *Decoder) {
846  return DecodeVecShiftRImm(Inst, Imm, 16);
847 }
848 
849 static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm,
850  uint64_t Addr,
851  const void *Decoder) {
852  return DecodeVecShiftRImm(Inst, Imm | 0x8, 16);
853 }
854 
855 static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm,
856  uint64_t Addr, const void *Decoder) {
857  return DecodeVecShiftRImm(Inst, Imm, 8);
858 }
859 
860 static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm,
861  uint64_t Addr, const void *Decoder) {
862  return DecodeVecShiftLImm(Inst, Imm, 64);
863 }
864 
865 static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm,
866  uint64_t Addr, const void *Decoder) {
867  return DecodeVecShiftLImm(Inst, Imm, 32);
868 }
869 
870 static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm,
871  uint64_t Addr, const void *Decoder) {
872  return DecodeVecShiftLImm(Inst, Imm, 16);
873 }
874 
875 static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm,
876  uint64_t Addr, const void *Decoder) {
877  return DecodeVecShiftLImm(Inst, Imm, 8);
878 }
879 
880 static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn,
881  uint64_t Addr,
882  const void *Decoder) {
883  unsigned Rd = fieldFromInstruction(insn, 0, 5);
884  unsigned Rn = fieldFromInstruction(insn, 5, 5);
885  unsigned Rm = fieldFromInstruction(insn, 16, 5);
886  unsigned shiftHi = fieldFromInstruction(insn, 22, 2);
887  unsigned shiftLo = fieldFromInstruction(insn, 10, 6);
888  unsigned shift = (shiftHi << 6) | shiftLo;
889  switch (Inst.getOpcode()) {
890  default:
891  return Fail;
892  case AArch64::ADDWrs:
893  case AArch64::ADDSWrs:
894  case AArch64::SUBWrs:
895  case AArch64::SUBSWrs:
896  // if shift == '11' then ReservedValue()
897  if (shiftHi == 0x3)
898  return Fail;
899  LLVM_FALLTHROUGH;
900  case AArch64::ANDWrs:
901  case AArch64::ANDSWrs:
902  case AArch64::BICWrs:
903  case AArch64::BICSWrs:
904  case AArch64::ORRWrs:
905  case AArch64::ORNWrs:
906  case AArch64::EORWrs:
907  case AArch64::EONWrs: {
908  // if sf == '0' and imm6<5> == '1' then ReservedValue()
909  if (shiftLo >> 5 == 1)
910  return Fail;
911  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
912  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
913  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
914  break;
915  }
916  case AArch64::ADDXrs:
917  case AArch64::ADDSXrs:
918  case AArch64::SUBXrs:
919  case AArch64::SUBSXrs:
920  // if shift == '11' then ReservedValue()
921  if (shiftHi == 0x3)
922  return Fail;
923  LLVM_FALLTHROUGH;
924  case AArch64::ANDXrs:
925  case AArch64::ANDSXrs:
926  case AArch64::BICXrs:
927  case AArch64::BICSXrs:
928  case AArch64::ORRXrs:
929  case AArch64::ORNXrs:
930  case AArch64::EORXrs:
931  case AArch64::EONXrs:
932  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
933  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
934  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
935  break;
936  }
937 
938  Inst.addOperand(MCOperand::createImm(shift));
939  return Success;
940 }
941 
942 static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn,
943  uint64_t Addr,
944  const void *Decoder) {
945  unsigned Rd = fieldFromInstruction(insn, 0, 5);
946  unsigned imm = fieldFromInstruction(insn, 5, 16);
947  unsigned shift = fieldFromInstruction(insn, 21, 2);
948  shift <<= 4;
949  switch (Inst.getOpcode()) {
950  default:
951  return Fail;
952  case AArch64::MOVZWi:
953  case AArch64::MOVNWi:
954  case AArch64::MOVKWi:
955  if (shift & (1U << 5))
956  return Fail;
957  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
958  break;
959  case AArch64::MOVZXi:
960  case AArch64::MOVNXi:
961  case AArch64::MOVKXi:
962  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
963  break;
964  }
965 
966  if (Inst.getOpcode() == AArch64::MOVKWi ||
967  Inst.getOpcode() == AArch64::MOVKXi)
968  Inst.addOperand(Inst.getOperand(0));
969 
970  Inst.addOperand(MCOperand::createImm(imm));
971  Inst.addOperand(MCOperand::createImm(shift));
972  return Success;
973 }
974 
975 static DecodeStatus DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn,
976  uint64_t Addr,
977  const void *Decoder) {
978  unsigned Rt = fieldFromInstruction(insn, 0, 5);
979  unsigned Rn = fieldFromInstruction(insn, 5, 5);
980  unsigned offset = fieldFromInstruction(insn, 10, 12);
981  const AArch64Disassembler *Dis =
982  static_cast<const AArch64Disassembler *>(Decoder);
983 
984  switch (Inst.getOpcode()) {
985  default:
986  return Fail;
987  case AArch64::PRFMui:
988  // Rt is an immediate in prefetch.
989  Inst.addOperand(MCOperand::createImm(Rt));
990  break;
991  case AArch64::STRBBui:
992  case AArch64::LDRBBui:
993  case AArch64::LDRSBWui:
994  case AArch64::STRHHui:
995  case AArch64::LDRHHui:
996  case AArch64::LDRSHWui:
997  case AArch64::STRWui:
998  case AArch64::LDRWui:
999  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1000  break;
1001  case AArch64::LDRSBXui:
1002  case AArch64::LDRSHXui:
1003  case AArch64::LDRSWui:
1004  case AArch64::STRXui:
1005  case AArch64::LDRXui:
1006  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1007  break;
1008  case AArch64::LDRQui:
1009  case AArch64::STRQui:
1010  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1011  break;
1012  case AArch64::LDRDui:
1013  case AArch64::STRDui:
1014  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1015  break;
1016  case AArch64::LDRSui:
1017  case AArch64::STRSui:
1018  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1019  break;
1020  case AArch64::LDRHui:
1021  case AArch64::STRHui:
1022  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1023  break;
1024  case AArch64::LDRBui:
1025  case AArch64::STRBui:
1026  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1027  break;
1028  }
1029 
1030  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1031  if (!Dis->tryAddingSymbolicOperand(Inst, offset, Addr, Fail, 0, 4))
1032  Inst.addOperand(MCOperand::createImm(offset));
1033  return Success;
1034 }
1035 
1036 static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn,
1037  uint64_t Addr,
1038  const void *Decoder) {
1039  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1040  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1041  int64_t offset = fieldFromInstruction(insn, 12, 9);
1042 
1043  // offset is a 9-bit signed immediate, so sign extend it to
1044  // fill the unsigned.
1045  if (offset & (1 << (9 - 1)))
1046  offset |= ~((1LL << 9) - 1);
1047 
1048  // First operand is always the writeback to the address register, if needed.
1049  switch (Inst.getOpcode()) {
1050  default:
1051  break;
1052  case AArch64::LDRSBWpre:
1053  case AArch64::LDRSHWpre:
1054  case AArch64::STRBBpre:
1055  case AArch64::LDRBBpre:
1056  case AArch64::STRHHpre:
1057  case AArch64::LDRHHpre:
1058  case AArch64::STRWpre:
1059  case AArch64::LDRWpre:
1060  case AArch64::LDRSBWpost:
1061  case AArch64::LDRSHWpost:
1062  case AArch64::STRBBpost:
1063  case AArch64::LDRBBpost:
1064  case AArch64::STRHHpost:
1065  case AArch64::LDRHHpost:
1066  case AArch64::STRWpost:
1067  case AArch64::LDRWpost:
1068  case AArch64::LDRSBXpre:
1069  case AArch64::LDRSHXpre:
1070  case AArch64::STRXpre:
1071  case AArch64::LDRSWpre:
1072  case AArch64::LDRXpre:
1073  case AArch64::LDRSBXpost:
1074  case AArch64::LDRSHXpost:
1075  case AArch64::STRXpost:
1076  case AArch64::LDRSWpost:
1077  case AArch64::LDRXpost:
1078  case AArch64::LDRQpre:
1079  case AArch64::STRQpre:
1080  case AArch64::LDRQpost:
1081  case AArch64::STRQpost:
1082  case AArch64::LDRDpre:
1083  case AArch64::STRDpre:
1084  case AArch64::LDRDpost:
1085  case AArch64::STRDpost:
1086  case AArch64::LDRSpre:
1087  case AArch64::STRSpre:
1088  case AArch64::LDRSpost:
1089  case AArch64::STRSpost:
1090  case AArch64::LDRHpre:
1091  case AArch64::STRHpre:
1092  case AArch64::LDRHpost:
1093  case AArch64::STRHpost:
1094  case AArch64::LDRBpre:
1095  case AArch64::STRBpre:
1096  case AArch64::LDRBpost:
1097  case AArch64::STRBpost:
1098  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1099  break;
1100  }
1101 
1102  switch (Inst.getOpcode()) {
1103  default:
1104  return Fail;
1105  case AArch64::PRFUMi:
1106  // Rt is an immediate in prefetch.
1107  Inst.addOperand(MCOperand::createImm(Rt));
1108  break;
1109  case AArch64::STURBBi:
1110  case AArch64::LDURBBi:
1111  case AArch64::LDURSBWi:
1112  case AArch64::STURHHi:
1113  case AArch64::LDURHHi:
1114  case AArch64::LDURSHWi:
1115  case AArch64::STURWi:
1116  case AArch64::LDURWi:
1117  case AArch64::LDTRSBWi:
1118  case AArch64::LDTRSHWi:
1119  case AArch64::STTRWi:
1120  case AArch64::LDTRWi:
1121  case AArch64::STTRHi:
1122  case AArch64::LDTRHi:
1123  case AArch64::LDTRBi:
1124  case AArch64::STTRBi:
1125  case AArch64::LDRSBWpre:
1126  case AArch64::LDRSHWpre:
1127  case AArch64::STRBBpre:
1128  case AArch64::LDRBBpre:
1129  case AArch64::STRHHpre:
1130  case AArch64::LDRHHpre:
1131  case AArch64::STRWpre:
1132  case AArch64::LDRWpre:
1133  case AArch64::LDRSBWpost:
1134  case AArch64::LDRSHWpost:
1135  case AArch64::STRBBpost:
1136  case AArch64::LDRBBpost:
1137  case AArch64::STRHHpost:
1138  case AArch64::LDRHHpost:
1139  case AArch64::STRWpost:
1140  case AArch64::LDRWpost:
1141  case AArch64::STLURBi:
1142  case AArch64::STLURHi:
1143  case AArch64::STLURWi:
1144  case AArch64::LDAPURBi:
1145  case AArch64::LDAPURSBWi:
1146  case AArch64::LDAPURHi:
1147  case AArch64::LDAPURSHWi:
1148  case AArch64::LDAPURi:
1149  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1150  break;
1151  case AArch64::LDURSBXi:
1152  case AArch64::LDURSHXi:
1153  case AArch64::LDURSWi:
1154  case AArch64::STURXi:
1155  case AArch64::LDURXi:
1156  case AArch64::LDTRSBXi:
1157  case AArch64::LDTRSHXi:
1158  case AArch64::LDTRSWi:
1159  case AArch64::STTRXi:
1160  case AArch64::LDTRXi:
1161  case AArch64::LDRSBXpre:
1162  case AArch64::LDRSHXpre:
1163  case AArch64::STRXpre:
1164  case AArch64::LDRSWpre:
1165  case AArch64::LDRXpre:
1166  case AArch64::LDRSBXpost:
1167  case AArch64::LDRSHXpost:
1168  case AArch64::STRXpost:
1169  case AArch64::LDRSWpost:
1170  case AArch64::LDRXpost:
1171  case AArch64::LDAPURSWi:
1172  case AArch64::LDAPURSHXi:
1173  case AArch64::LDAPURSBXi:
1174  case AArch64::STLURXi:
1175  case AArch64::LDAPURXi:
1176  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1177  break;
1178  case AArch64::LDURQi:
1179  case AArch64::STURQi:
1180  case AArch64::LDRQpre:
1181  case AArch64::STRQpre:
1182  case AArch64::LDRQpost:
1183  case AArch64::STRQpost:
1184  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1185  break;
1186  case AArch64::LDURDi:
1187  case AArch64::STURDi:
1188  case AArch64::LDRDpre:
1189  case AArch64::STRDpre:
1190  case AArch64::LDRDpost:
1191  case AArch64::STRDpost:
1192  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1193  break;
1194  case AArch64::LDURSi:
1195  case AArch64::STURSi:
1196  case AArch64::LDRSpre:
1197  case AArch64::STRSpre:
1198  case AArch64::LDRSpost:
1199  case AArch64::STRSpost:
1200  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1201  break;
1202  case AArch64::LDURHi:
1203  case AArch64::STURHi:
1204  case AArch64::LDRHpre:
1205  case AArch64::STRHpre:
1206  case AArch64::LDRHpost:
1207  case AArch64::STRHpost:
1208  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1209  break;
1210  case AArch64::LDURBi:
1211  case AArch64::STURBi:
1212  case AArch64::LDRBpre:
1213  case AArch64::STRBpre:
1214  case AArch64::LDRBpost:
1215  case AArch64::STRBpost:
1216  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1217  break;
1218  }
1219 
1220  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1221  Inst.addOperand(MCOperand::createImm(offset));
1222 
1223  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1224  bool IsIndexed = fieldFromInstruction(insn, 10, 2) != 0;
1225  bool IsFP = fieldFromInstruction(insn, 26, 1);
1226 
1227  // Cannot write back to a transfer register (but xzr != sp).
1228  if (IsLoad && IsIndexed && !IsFP && Rn != 31 && Rt == Rn)
1229  return SoftFail;
1230 
1231  return Success;
1232 }
1233 
1234 static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn,
1235  uint64_t Addr,
1236  const void *Decoder) {
1237  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1238  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1239  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1240  unsigned Rs = fieldFromInstruction(insn, 16, 5);
1241 
1242  unsigned Opcode = Inst.getOpcode();
1243  switch (Opcode) {
1244  default:
1245  return Fail;
1246  case AArch64::STLXRW:
1247  case AArch64::STLXRB:
1248  case AArch64::STLXRH:
1249  case AArch64::STXRW:
1250  case AArch64::STXRB:
1251  case AArch64::STXRH:
1252  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1253  LLVM_FALLTHROUGH;
1254  case AArch64::LDARW:
1255  case AArch64::LDARB:
1256  case AArch64::LDARH:
1257  case AArch64::LDAXRW:
1258  case AArch64::LDAXRB:
1259  case AArch64::LDAXRH:
1260  case AArch64::LDXRW:
1261  case AArch64::LDXRB:
1262  case AArch64::LDXRH:
1263  case AArch64::STLRW:
1264  case AArch64::STLRB:
1265  case AArch64::STLRH:
1266  case AArch64::STLLRW:
1267  case AArch64::STLLRB:
1268  case AArch64::STLLRH:
1269  case AArch64::LDLARW:
1270  case AArch64::LDLARB:
1271  case AArch64::LDLARH:
1272  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1273  break;
1274  case AArch64::STLXRX:
1275  case AArch64::STXRX:
1276  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1277  LLVM_FALLTHROUGH;
1278  case AArch64::LDARX:
1279  case AArch64::LDAXRX:
1280  case AArch64::LDXRX:
1281  case AArch64::STLRX:
1282  case AArch64::LDLARX:
1283  case AArch64::STLLRX:
1284  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1285  break;
1286  case AArch64::STLXPW:
1287  case AArch64::STXPW:
1288  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1289  LLVM_FALLTHROUGH;
1290  case AArch64::LDAXPW:
1291  case AArch64::LDXPW:
1292  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1293  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1294  break;
1295  case AArch64::STLXPX:
1296  case AArch64::STXPX:
1297  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1298  LLVM_FALLTHROUGH;
1299  case AArch64::LDAXPX:
1300  case AArch64::LDXPX:
1301  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1302  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1303  break;
1304  }
1305 
1306  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1307 
1308  // You shouldn't load to the same register twice in an instruction...
1309  if ((Opcode == AArch64::LDAXPW || Opcode == AArch64::LDXPW ||
1310  Opcode == AArch64::LDAXPX || Opcode == AArch64::LDXPX) &&
1311  Rt == Rt2)
1312  return SoftFail;
1313 
1314  return Success;
1315 }
1316 
1317 static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn,
1318  uint64_t Addr,
1319  const void *Decoder) {
1320  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1321  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1322  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1323  int64_t offset = fieldFromInstruction(insn, 15, 7);
1324  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1325 
1326  // offset is a 7-bit signed immediate, so sign extend it to
1327  // fill the unsigned.
1328  if (offset & (1 << (7 - 1)))
1329  offset |= ~((1LL << 7) - 1);
1330 
1331  unsigned Opcode = Inst.getOpcode();
1332  bool NeedsDisjointWritebackTransfer = false;
1333 
1334  // First operand is always writeback of base register.
1335  switch (Opcode) {
1336  default:
1337  break;
1338  case AArch64::LDPXpost:
1339  case AArch64::STPXpost:
1340  case AArch64::LDPSWpost:
1341  case AArch64::LDPXpre:
1342  case AArch64::STPXpre:
1343  case AArch64::LDPSWpre:
1344  case AArch64::LDPWpost:
1345  case AArch64::STPWpost:
1346  case AArch64::LDPWpre:
1347  case AArch64::STPWpre:
1348  case AArch64::LDPQpost:
1349  case AArch64::STPQpost:
1350  case AArch64::LDPQpre:
1351  case AArch64::STPQpre:
1352  case AArch64::LDPDpost:
1353  case AArch64::STPDpost:
1354  case AArch64::LDPDpre:
1355  case AArch64::STPDpre:
1356  case AArch64::LDPSpost:
1357  case AArch64::STPSpost:
1358  case AArch64::LDPSpre:
1359  case AArch64::STPSpre:
1360  case AArch64::STGPpre:
1361  case AArch64::STGPpost:
1362  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1363  break;
1364  }
1365 
1366  switch (Opcode) {
1367  default:
1368  return Fail;
1369  case AArch64::LDPXpost:
1370  case AArch64::STPXpost:
1371  case AArch64::LDPSWpost:
1372  case AArch64::LDPXpre:
1373  case AArch64::STPXpre:
1374  case AArch64::LDPSWpre:
1375  case AArch64::STGPpre:
1376  case AArch64::STGPpost:
1377  NeedsDisjointWritebackTransfer = true;
1378  LLVM_FALLTHROUGH;
1379  case AArch64::LDNPXi:
1380  case AArch64::STNPXi:
1381  case AArch64::LDPXi:
1382  case AArch64::STPXi:
1383  case AArch64::LDPSWi:
1384  case AArch64::STGPi:
1385  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1386  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1387  break;
1388  case AArch64::LDPWpost:
1389  case AArch64::STPWpost:
1390  case AArch64::LDPWpre:
1391  case AArch64::STPWpre:
1392  NeedsDisjointWritebackTransfer = true;
1393  LLVM_FALLTHROUGH;
1394  case AArch64::LDNPWi:
1395  case AArch64::STNPWi:
1396  case AArch64::LDPWi:
1397  case AArch64::STPWi:
1398  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1399  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1400  break;
1401  case AArch64::LDNPQi:
1402  case AArch64::STNPQi:
1403  case AArch64::LDPQpost:
1404  case AArch64::STPQpost:
1405  case AArch64::LDPQi:
1406  case AArch64::STPQi:
1407  case AArch64::LDPQpre:
1408  case AArch64::STPQpre:
1409  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1410  DecodeFPR128RegisterClass(Inst, Rt2, Addr, Decoder);
1411  break;
1412  case AArch64::LDNPDi:
1413  case AArch64::STNPDi:
1414  case AArch64::LDPDpost:
1415  case AArch64::STPDpost:
1416  case AArch64::LDPDi:
1417  case AArch64::STPDi:
1418  case AArch64::LDPDpre:
1419  case AArch64::STPDpre:
1420  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1421  DecodeFPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1422  break;
1423  case AArch64::LDNPSi:
1424  case AArch64::STNPSi:
1425  case AArch64::LDPSpost:
1426  case AArch64::STPSpost:
1427  case AArch64::LDPSi:
1428  case AArch64::STPSi:
1429  case AArch64::LDPSpre:
1430  case AArch64::STPSpre:
1431  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1432  DecodeFPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1433  break;
1434  }
1435 
1436  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1437  Inst.addOperand(MCOperand::createImm(offset));
1438 
1439  // You shouldn't load to the same register twice in an instruction...
1440  if (IsLoad && Rt == Rt2)
1441  return SoftFail;
1442 
1443  // ... or do any operation that writes-back to a transfer register. But note
1444  // that "stp xzr, xzr, [sp], #4" is fine because xzr and sp are different.
1445  if (NeedsDisjointWritebackTransfer && Rn != 31 && (Rt == Rn || Rt2 == Rn))
1446  return SoftFail;
1447 
1448  return Success;
1449 }
1450 
1451 static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn,
1452  uint64_t Addr,
1453  const void *Decoder) {
1454  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1455  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1456  uint64_t offset = fieldFromInstruction(insn, 22, 1) << 9 |
1457  fieldFromInstruction(insn, 12, 9);
1458  unsigned writeback = fieldFromInstruction(insn, 11, 1);
1459 
1460  switch (Inst.getOpcode()) {
1461  default:
1462  return Fail;
1463  case AArch64::LDRAAwriteback:
1464  case AArch64::LDRABwriteback:
1465  DecodeGPR64spRegisterClass(Inst, Rn /* writeback register */, Addr,
1466  Decoder);
1467  break;
1468  case AArch64::LDRAAindexed:
1469  case AArch64::LDRABindexed:
1470  break;
1471  }
1472 
1473  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1474  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1475  DecodeSImm<10>(Inst, offset, Addr, Decoder);
1476 
1477  if (writeback && Rt == Rn && Rn != 31) {
1478  return SoftFail;
1479  }
1480 
1481  return Success;
1482 }
1483 
1484 static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn,
1485  uint64_t Addr,
1486  const void *Decoder) {
1487  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1488  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1489  unsigned Rm = fieldFromInstruction(insn, 16, 5);
1490  unsigned extend = fieldFromInstruction(insn, 10, 6);
1491 
1492  unsigned shift = extend & 0x7;
1493  if (shift > 4)
1494  return Fail;
1495 
1496  switch (Inst.getOpcode()) {
1497  default:
1498  return Fail;
1499  case AArch64::ADDWrx:
1500  case AArch64::SUBWrx:
1501  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1502  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1503  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1504  break;
1505  case AArch64::ADDSWrx:
1506  case AArch64::SUBSWrx:
1507  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1508  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1509  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1510  break;
1511  case AArch64::ADDXrx:
1512  case AArch64::SUBXrx:
1513  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1514  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1515  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1516  break;
1517  case AArch64::ADDSXrx:
1518  case AArch64::SUBSXrx:
1519  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1520  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1521  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1522  break;
1523  case AArch64::ADDXrx64:
1524  case AArch64::SUBXrx64:
1525  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1526  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1527  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1528  break;
1529  case AArch64::SUBSXrx64:
1530  case AArch64::ADDSXrx64:
1531  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1532  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1533  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1534  break;
1535  }
1536 
1537  Inst.addOperand(MCOperand::createImm(extend));
1538  return Success;
1539 }
1540 
1541 static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn,
1542  uint64_t Addr,
1543  const void *Decoder) {
1544  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1545  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1546  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1547  unsigned imm;
1548 
1549  if (Datasize) {
1550  if (Inst.getOpcode() == AArch64::ANDSXri)
1551  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1552  else
1553  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1554  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
1555  imm = fieldFromInstruction(insn, 10, 13);
1556  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1557  return Fail;
1558  } else {
1559  if (Inst.getOpcode() == AArch64::ANDSWri)
1560  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1561  else
1562  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1563  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
1564  imm = fieldFromInstruction(insn, 10, 12);
1565  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 32))
1566  return Fail;
1567  }
1568  Inst.addOperand(MCOperand::createImm(imm));
1569  return Success;
1570 }
1571 
1572 static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn,
1573  uint64_t Addr,
1574  const void *Decoder) {
1575  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1576  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1577  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1578  imm |= fieldFromInstruction(insn, 5, 5);
1579 
1580  if (Inst.getOpcode() == AArch64::MOVID)
1581  DecodeFPR64RegisterClass(Inst, Rd, Addr, Decoder);
1582  else
1583  DecodeFPR128RegisterClass(Inst, Rd, Addr, Decoder);
1584 
1585  Inst.addOperand(MCOperand::createImm(imm));
1586 
1587  switch (Inst.getOpcode()) {
1588  default:
1589  break;
1590  case AArch64::MOVIv4i16:
1591  case AArch64::MOVIv8i16:
1592  case AArch64::MVNIv4i16:
1593  case AArch64::MVNIv8i16:
1594  case AArch64::MOVIv2i32:
1595  case AArch64::MOVIv4i32:
1596  case AArch64::MVNIv2i32:
1597  case AArch64::MVNIv4i32:
1598  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1599  break;
1600  case AArch64::MOVIv2s_msl:
1601  case AArch64::MOVIv4s_msl:
1602  case AArch64::MVNIv2s_msl:
1603  case AArch64::MVNIv4s_msl:
1604  Inst.addOperand(MCOperand::createImm((cmode & 1) ? 0x110 : 0x108));
1605  break;
1606  }
1607 
1608  return Success;
1609 }
1610 
1611 static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn,
1612  uint64_t Addr,
1613  const void *Decoder) {
1614  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1615  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1616  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1617  imm |= fieldFromInstruction(insn, 5, 5);
1618 
1619  // Tied operands added twice.
1620  DecodeFPR128RegisterClass(Inst, Rd, Addr, Decoder);
1621  DecodeFPR128RegisterClass(Inst, Rd, Addr, Decoder);
1622 
1623  Inst.addOperand(MCOperand::createImm(imm));
1624  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1625 
1626  return Success;
1627 }
1628 
1629 static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn,
1630  uint64_t Addr, const void *Decoder) {
1631  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1632  int64_t imm = fieldFromInstruction(insn, 5, 19) << 2;
1633  imm |= fieldFromInstruction(insn, 29, 2);
1634  const AArch64Disassembler *Dis =
1635  static_cast<const AArch64Disassembler *>(Decoder);
1636 
1637  // Sign-extend the 21-bit immediate.
1638  if (imm & (1 << (21 - 1)))
1639  imm |= ~((1LL << 21) - 1);
1640 
1641  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1642  if (!Dis->tryAddingSymbolicOperand(Inst, imm, Addr, Fail, 0, 4))
1643  Inst.addOperand(MCOperand::createImm(imm));
1644 
1645  return Success;
1646 }
1647 
1648 static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn,
1649  uint64_t Addr, const void *Decoder) {
1650  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1651  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1652  unsigned Imm = fieldFromInstruction(insn, 10, 14);
1653  unsigned S = fieldFromInstruction(insn, 29, 1);
1654  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1655 
1656  unsigned ShifterVal = (Imm >> 12) & 3;
1657  unsigned ImmVal = Imm & 0xFFF;
1658  const AArch64Disassembler *Dis =
1659  static_cast<const AArch64Disassembler *>(Decoder);
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 (!Dis->tryAddingSymbolicOperand(Inst, Imm, Addr, Fail, 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 void *Decoder) {
1687  int64_t imm = fieldFromInstruction(insn, 0, 26);
1688  const AArch64Disassembler *Dis =
1689  static_cast<const AArch64Disassembler *>(Decoder);
1690 
1691  // Sign-extend the 26-bit immediate.
1692  if (imm & (1 << (26 - 1)))
1693  imm |= ~((1LL << 26) - 1);
1694 
1695  if (!Dis->tryAddingSymbolicOperand(Inst, imm * 4, Addr, true, 0, 4))
1696  Inst.addOperand(MCOperand::createImm(imm));
1697 
1698  return Success;
1699 }
1700 
1701 static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn,
1702  uint64_t Addr,
1703  const void *Decoder) {
1704  uint64_t op1 = fieldFromInstruction(insn, 16, 3);
1705  uint64_t op2 = fieldFromInstruction(insn, 5, 3);
1706  uint64_t crm = fieldFromInstruction(insn, 8, 4);
1707  uint64_t pstate_field = (op1 << 3) | op2;
1708 
1709  switch (pstate_field) {
1710  case 0x01: // XAFlag
1711  case 0x02: // AXFlag
1712  return Fail;
1713  }
1714 
1715  if ((pstate_field == AArch64PState::PAN ||
1716  pstate_field == AArch64PState::UAO ||
1717  pstate_field == AArch64PState::SSBS) && crm > 1)
1718  return Fail;
1719 
1720  Inst.addOperand(MCOperand::createImm(pstate_field));
1721  Inst.addOperand(MCOperand::createImm(crm));
1722 
1723  const AArch64Disassembler *Dis =
1724  static_cast<const AArch64Disassembler *>(Decoder);
1725  auto PState = AArch64PState::lookupPStateByEncoding(pstate_field);
1726  if (PState && PState->haveFeatures(Dis->getSubtargetInfo().getFeatureBits()))
1727  return Success;
1728  return Fail;
1729 }
1730 
1731 static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn,
1732  uint64_t Addr, const void *Decoder) {
1733  uint64_t Rt = fieldFromInstruction(insn, 0, 5);
1734  uint64_t bit = fieldFromInstruction(insn, 31, 1) << 5;
1735  bit |= fieldFromInstruction(insn, 19, 5);
1736  int64_t dst = fieldFromInstruction(insn, 5, 14);
1737  const AArch64Disassembler *Dis =
1738  static_cast<const AArch64Disassembler *>(Decoder);
1739 
1740  // Sign-extend 14-bit immediate.
1741  if (dst & (1 << (14 - 1)))
1742  dst |= ~((1LL << 14) - 1);
1743 
1744  if (fieldFromInstruction(insn, 31, 1) == 0)
1745  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1746  else
1747  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1748  Inst.addOperand(MCOperand::createImm(bit));
1749  if (!Dis->tryAddingSymbolicOperand(Inst, dst * 4, Addr, true, 0, 4))
1750  Inst.addOperand(MCOperand::createImm(dst));
1751 
1752  return Success;
1753 }
1754 
1755 static DecodeStatus DecodeGPRSeqPairsClassRegisterClass(MCInst &Inst,
1756  unsigned RegClassID,
1757  unsigned RegNo,
1758  uint64_t Addr,
1759  const void *Decoder) {
1760  // Register number must be even (see CASP instruction)
1761  if (RegNo & 0x1)
1762  return Fail;
1763 
1764  unsigned Reg = AArch64MCRegisterClasses[RegClassID].getRegister(RegNo / 2);
1765  Inst.addOperand(MCOperand::createReg(Reg));
1766  return Success;
1767 }
1768 
1769 static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst,
1770  unsigned RegNo,
1771  uint64_t Addr,
1772  const void *Decoder) {
1773  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1774  AArch64::WSeqPairsClassRegClassID,
1775  RegNo, Addr, Decoder);
1776 }
1777 
1778 static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst,
1779  unsigned RegNo,
1780  uint64_t Addr,
1781  const void *Decoder) {
1782  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1783  AArch64::XSeqPairsClassRegClassID,
1784  RegNo, Addr, Decoder);
1785 }
1786 
1787 static DecodeStatus DecodeSVELogicalImmInstruction(MCInst &Inst, uint32_t insn,
1788  uint64_t Addr,
1789  const void *Decoder) {
1790  unsigned Zdn = fieldFromInstruction(insn, 0, 5);
1791  unsigned imm = fieldFromInstruction(insn, 5, 13);
1792  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1793  return Fail;
1794 
1795  // The same (tied) operand is added twice to the instruction.
1796  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1797  if (Inst.getOpcode() != AArch64::DUPM_ZI)
1798  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1799  Inst.addOperand(MCOperand::createImm(imm));
1800  return Success;
1801 }
1802 
1803 template <int Bits>
1804 static DecodeStatus DecodeSImm(MCInst &Inst, uint64_t Imm, uint64_t Address,
1805  const void *Decoder) {
1806  if (Imm & ~((1LL << Bits) - 1))
1807  return Fail;
1808 
1809  // Imm is a signed immediate, so sign extend it.
1810  if (Imm & (1 << (Bits - 1)))
1811  Imm |= ~((1LL << Bits) - 1);
1812 
1813  Inst.addOperand(MCOperand::createImm(Imm));
1814  return Success;
1815 }
1816 
1817 // Decode 8-bit signed/unsigned immediate for a given element width.
1818 template <int ElementWidth>
1819 static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm,
1820  uint64_t Addr, const void *Decoder) {
1821  unsigned Val = (uint8_t)Imm;
1822  unsigned Shift = (Imm & 0x100) ? 8 : 0;
1823  if (ElementWidth == 8 && Shift)
1824  return Fail;
1825  Inst.addOperand(MCOperand::createImm(Val));
1826  Inst.addOperand(MCOperand::createImm(Shift));
1827  return Success;
1828 }
1829 
1830 // Decode uimm4 ranged from 1-16.
1831 static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm,
1832  uint64_t Addr, const void *Decoder) {
1833  Inst.addOperand(MCOperand::createImm(Imm + 1));
1834  return Success;
1835 }
1836 
1837 static DecodeStatus DecodeSVCROp(MCInst &Inst, unsigned Imm, uint64_t Address,
1838  const void *Decoder) {
1839  if (AArch64SVCR::lookupSVCRByEncoding(Imm)) {
1840  Inst.addOperand(MCOperand::createImm(Imm));
1841  return Success;
1842  }
1843  return Fail;
1844 }
llvm::Check::Size
@ Size
Definition: FileCheck.h:73
DecodeSVEIncDecImm
static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1831
MCFixedLenDisassembler.h
DecodePCRelLabel19
static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:746
DecodeAuthLoadInstruction
static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1451
createAArch64Disassembler
static MCDisassembler * createAArch64Disassembler(const Target &T, const MCSubtargetInfo &STI, MCContext &Ctx)
Definition: AArch64Disassembler.cpp:264
MI
IRTranslator LLVM IR MI
Definition: IRTranslator.cpp:105
llvm
This file implements support for optimizing divisions by a constant.
Definition: AllocatorList.h:23
Reg
unsigned Reg
Definition: MachineSink.cpp:1566
DecodeFPR128_loRegisterClass
static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:407
DecodeZPR3RegisterClass
static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:592
DecodeSignedLdStInstruction
static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1036
DecodeUnsignedLdStInstruction
static DecodeStatus DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:975
DecodeZPR_3bRegisterClass
static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:573
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:72
llvm::Target
Target - Wrapper for Target specific information.
Definition: TargetRegistry.h:137
llvm::SmallVector
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
Definition: SmallVector.h:1168
DecodeQQQRegisterClass
static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:678
DecodeGPR64x8ClassRegisterClass
static DecodeStatus DecodeGPR64x8ClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:488
LLVMInitializeAArch64Disassembler
LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64Disassembler()
Definition: AArch64Disassembler.cpp:371
ErrorHandling.h
DecodeAddSubImmShift
static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1648
AArch64BaseInfo.h
llvm::getTheAArch64_32Target
Target & getTheAArch64_32Target()
Definition: AArch64TargetInfo.cpp:21
Fail
#define Fail
Definition: AArch64Disassembler.cpp:261
llvm::Triple
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:45
DecodeFMOVLaneInstruction
static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:787
Disassembler.h
DecodeVecShiftR64Imm
static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:822
Shift
bool Shift
Definition: README.txt:468
llvm::MCDisassembler::SoftFail
@ SoftFail
Definition: MCDisassembler.h:102
AArch64ExternalSymbolizer.h
llvm::tgtok::Bits
@ Bits
Definition: TGLexer.h:50
DecodeMRSSystemRegister
static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:769
DecodeGPR32RegisterClass
static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:529
createAArch64ExternalSymbolizer
static MCSymbolizer * createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo, LLVMSymbolLookupCallback SymbolLookUp, void *DisInfo, MCContext *Ctx, std::unique_ptr< MCRelocationInfo > &&RelInfo)
Definition: AArch64Disassembler.cpp:363
DecodeVecShiftL64Imm
static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:860
DecodeFPR64RegisterClass
static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:415
DecodeDDRegisterClass
static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:699
llvm::TargetRegistry::RegisterMCDisassembler
static void RegisterMCDisassembler(Target &T, Target::MCDisassemblerCtorTy Fn)
RegisterMCDisassembler - Register a MCDisassembler implementation for the given target.
Definition: TargetRegistry.h:916
DecodeMoveImmInstruction
static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:942
AArch64Disassembler.h
DecodeVecShiftL16Imm
static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:870
DecodeGPR64commonRegisterClass
static DecodeStatus DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:463
llvm::MCInst
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
DecodeVecShiftR64ImmNarrow
static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:827
DecodeGPR64spRegisterClass
static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:504
DecodeGPR32spRegisterClass
static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:541
DecodeVecShiftLImm
static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm, unsigned Add)
Definition: AArch64Disassembler.cpp:816
llvm::MCSymbolizer
Symbolize and annotate disassembled instructions.
Definition: MCSymbolizer.h:39
DecodeUnconditionalBranch
static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1684
DecodeFPR16RegisterClass
static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:439
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
MatrixZATileDecoderTable
static const SmallVector< SmallVector< unsigned, 16 >, 5 > MatrixZATileDecoderTable
Definition: AArch64Disassembler.cpp:625
LLVMOpInfoCallback
int(* LLVMOpInfoCallback)(void *DisInfo, uint64_t PC, uint64_t Offset, uint64_t Size, int TagType, void *TagBuf)
The type for the operand information call back function.
Definition: DisassemblerTypes.h:42
llvm::getTheAArch64leTarget
Target & getTheAArch64leTarget()
Definition: AArch64TargetInfo.cpp:13
llvm::MCDisassembler::Success
@ Success
Definition: MCDisassembler.h:103
DecodeFixedPointScaleImm32
static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:730
SoftFail
#define SoftFail
Definition: AArch64Disassembler.cpp:262
DecodeVecShiftL8Imm
static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:875
llvm::MCDisassembler::CommentStream
raw_ostream * CommentStream
Definition: MCDisassembler.h:192
MCInst.h
MCSubtargetInfo.h
llvm::MCSubtargetInfo::getFeatureBits
const FeatureBitset & getFeatureBits() const
Definition: MCSubtargetInfo.h:111
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:53
DecodeVecShiftR32ImmNarrow
static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:838
DecodeZPR_4bRegisterClass
static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:565
DecodeGPR64RegisterClass
static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:476
llvm::MCDisassembler::DecodeStatus
DecodeStatus
Ternary decode status.
Definition: MCDisassembler.h:100
DecodeVecShiftR16Imm
static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:844
llvm::MCDisassembler::STI
const MCSubtargetInfo & STI
Definition: MCDisassembler.h:170
llvm::MCInst::addOperand
void addOperand(const MCOperand Op)
Definition: MCInst.h:210
AArch64AddressingModes.h
DecodeAdrInstruction
static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1629
DecodeVecShiftR8Imm
static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:855
Check
static bool Check(DecodeStatus &Out, DecodeStatus In)
Definition: AArch64Disassembler.cpp:242
DecodeExclusiveLdStInstruction
static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1234
llvm::tgtok::In
@ In
Definition: TGLexer.h:51
llvm::MCOperand::isImm
bool isImm() const
Definition: MCInst.h:62
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:112
DecodeQQQQRegisterClass
static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:688
uint64_t
LLVM_EXTERNAL_VISIBILITY
#define LLVM_EXTERNAL_VISIBILITY
Definition: Compiler.h:132
DecodeQQRegisterClass
static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:668
Addr
uint64_t Addr
Definition: ELFObjHandler.cpp:80
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:810
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:76
DecodeFixedPointScaleImm64
static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:739
DecodeMatrixTile
static DecodeStatus DecodeMatrixTile(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:637
DecodeZPR2RegisterClass
static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:581
MCRegisterInfo.h
DecodeAddSubERegInstruction
static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1484
llvm::HighlightColor::Address
@ Address
DecodeDDDRegisterClass
static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:709
llvm::AArch64ExternalSymbolizer
Definition: AArch64ExternalSymbolizer.h:20
DecodeVecShiftL32Imm
static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:865
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
DecodeModImmTiedInstruction
static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1611
llvm::MCDisassembler::tryAddingSymbolicOperand
bool tryAddingSymbolicOperand(MCInst &Inst, int64_t Value, uint64_t Address, bool IsBranch, uint64_t Offset, uint64_t InstSize) const
Definition: MCDisassembler.cpp:26
llvm::getTheARM64_32Target
Target & getTheARM64_32Target()
Definition: AArch64TargetInfo.cpp:29
DecodeMatrixIndexGPR32_12_15RegisterClass
static DecodeStatus DecodeMatrixIndexGPR32_12_15RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:515
llvm::ArrayRef< uint8_t >
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:134
llvm::MCOperand::createReg
static MCOperand createReg(unsigned Reg)
Definition: MCInst.h:134
DecodePPRRegisterClass
static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:647
DecodeSVELogicalImmInstruction
static DecodeStatus DecodeSVELogicalImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1787
uint32_t
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:286
llvm::MCDisassembler::Fail
@ Fail
Definition: MCDisassembler.h:101
DecodeFPR32RegisterClass
static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:427
llvm::Register
Wrapper class representing virtual and physical registers.
Definition: Register.h:19
DecodeThreeAddrSRegInstruction
static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:880
DecodeDDDDRegisterClass
static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:719
DecodeModImmInstruction
static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1572
DecodeSystemPStateInstruction
static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1701
Insn
SmallVector< AArch64_IMM::ImmInsnModel, 4 > Insn
Definition: AArch64MIPeepholeOpt.cpp:74
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
Success
#define Success
Definition: AArch64Disassembler.cpp:260
DecodeImm8OptLsl
static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1819
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:270
MCRelocationInfo.h
llvm::getTheAArch64beTarget
Target & getTheAArch64beTarget()
Definition: AArch64TargetInfo.cpp:17
DecodeGPRSeqPairsClassRegisterClass
static DecodeStatus DecodeGPRSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegClassID, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1755
llvm::MCInst::getOpcode
unsigned getOpcode() const
Definition: MCInst.h:198
DecodeTestAndBranch
static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1731
AArch64MCTargetDesc.h
DecodeSVCROp
static DecodeStatus DecodeSVCROp(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1837
DecodePPR_3bRegisterClass
static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:658
llvm::MCDisassembler::getSubtargetInfo
const MCSubtargetInfo & getSubtargetInfo() const
Definition: MCDisassembler.h:188
DecodeVecShiftR32Imm
static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:833
DecodeXSeqPairsClassRegisterClass
static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1778
DecodeFPR128RegisterClass
static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:395
DecodeVecShiftR16ImmNarrow
static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:849
DecodeZPR4RegisterClass
static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:603
DecodeMemExtend
static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:762
llvm::getTheARM64Target
Target & getTheARM64Target()
Definition: AArch64TargetInfo.cpp:25
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:165
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
DecodeZPRRegisterClass
static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:553
llvm::AArch64Disassembler
Definition: AArch64Disassembler.h:19
DecodeFPR8RegisterClass
static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:451
DecodeMSRSystemRegister
static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:779
llvm::TargetRegistry::RegisterMCSymbolizer
static void RegisterMCSymbolizer(Target &T, Target::MCSymbolizerCtorTy Fn)
RegisterMCSymbolizer - Register an MCSymbolizer implementation for the given target.
Definition: TargetRegistry.h:1006
llvm::MCOperand
Instances of this class represent operands of the MCInst class.
Definition: MCInst.h:36
DecodeLogicalImmInstruction
static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1541
DecodePairLdStInstruction
static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1317
DecodeSImm
static DecodeStatus DecodeSImm(MCInst &Inst, uint64_t Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1804
TargetRegistry.h
llvm::MCSubtargetInfo
Generic base class for all target subtargets.
Definition: MCSubtargetInfo.h:75
DecodeMatrixTileListRegisterClass
static DecodeStatus DecodeMatrixTileListRegisterClass(MCInst &Inst, unsigned RegMask, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:614
Debug.h
DecodeWSeqPairsClassRegisterClass
static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1769
AArch64TargetInfo.h
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