LLVM  13.0.0git
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/Support/Compiler.h"
25 #include "llvm/Support/Debug.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/Support/TargetRegistry.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 DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo,
73  uint64_t Address,
74  const void *Decoder);
75 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst,
76  unsigned RegNo, uint64_t Address,
77  const void *Decoder);
78 static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo,
79  uint64_t Address,
80  const void *Decoder);
81 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo,
82  uint64_t Address,
83  const void *Decoder);
84 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo,
85  uint64_t Address,
86  const void *Decoder);
87 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo,
88  uint64_t Address,
89  const void *Decoder);
90 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo,
91  uint64_t Address,
92  const void *Decoder);
93 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo,
94  uint64_t Address,
95  const void *Decoder);
96 static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo,
97  uint64_t Address,
98  const void *Decoder);
99 static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo,
100  uint64_t Address,
101  const void *Decoder);
102 static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
103  uint64_t Address,
104  const void *Decoder);
105 static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo,
106  uint64_t Address,
107  const void *Decoder);
108 static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo,
109  uint64_t Address,
110  const void *Decoder);
111 static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo,
112  uint64_t Address,
113  const void *Decoder);
114 static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo,
115  uint64_t Address,
116  const void *Decoder);
117 static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
118  uint64_t Address,
119  const void *Decoder);
120 
121 static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm,
122  uint64_t Address,
123  const void *Decoder);
124 static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm,
125  uint64_t Address,
126  const void *Decoder);
127 static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm,
128  uint64_t Address, const void *Decoder);
129 static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm,
130  uint64_t Address, const void *Decoder);
131 static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm,
132  uint64_t Address, const void *Decoder);
133 static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm,
134  uint64_t Address, const void *Decoder);
135 static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn,
136  uint64_t Address,
137  const void *Decoder);
138 static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn,
139  uint64_t Address,
140  const void *Decoder);
141 static DecodeStatus DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn,
142  uint64_t Address,
143  const void *Decoder);
144 static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn,
145  uint64_t Address,
146  const void *Decoder);
147 static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn,
148  uint64_t Address,
149  const void *Decoder);
150 static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn,
151  uint64_t Address,
152  const void *Decoder);
153 static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn,
154  uint64_t Address,
155  const void *Decoder);
156 static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn,
157  uint64_t Address,
158  const void *Decoder);
159 static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn,
160  uint64_t Address,
161  const void *Decoder);
162 static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn,
163  uint64_t Address,
164  const void *Decoder);
165 static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn,
166  uint64_t Address,
167  const void *Decoder);
168 static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn,
169  uint64_t Address, const void *Decoder);
170 static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn,
171  uint64_t Address, const void *Decoder);
172 static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn,
173  uint64_t Address,
174  const void *Decoder);
175 static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn,
176  uint64_t Address,
177  const void *Decoder);
178 static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn,
179  uint64_t Address, const void *Decoder);
180 
181 static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn,
182  uint64_t Address,
183  const void *Decoder);
184 static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm,
185  uint64_t Addr, const void *Decoder);
186 static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm,
187  uint64_t Addr,
188  const void *Decoder);
189 static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm,
190  uint64_t Addr, const void *Decoder);
191 static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm,
192  uint64_t Addr,
193  const void *Decoder);
194 static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm,
195  uint64_t Addr, const void *Decoder);
196 static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm,
197  uint64_t Addr,
198  const void *Decoder);
199 static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm,
200  uint64_t Addr, const void *Decoder);
201 static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm,
202  uint64_t Addr, const void *Decoder);
203 static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm,
204  uint64_t Addr, const void *Decoder);
205 static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm,
206  uint64_t Addr, const void *Decoder);
207 static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm,
208  uint64_t Addr, const void *Decoder);
209 static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst,
210  unsigned RegNo,
211  uint64_t Addr,
212  const void *Decoder);
213 static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst,
214  unsigned RegNo,
215  uint64_t Addr,
216  const void *Decoder);
217 static DecodeStatus DecodeSVELogicalImmInstruction(llvm::MCInst &Inst,
218  uint32_t insn,
219  uint64_t Address,
220  const void *Decoder);
221 template<int Bits>
222 static DecodeStatus DecodeSImm(llvm::MCInst &Inst, uint64_t Imm,
223  uint64_t Address, const void *Decoder);
224 template <int ElementWidth>
225 static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm,
226  uint64_t Addr, const void *Decoder);
227 static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm,
228  uint64_t Addr, const void *Decoder);
229 
230 static bool Check(DecodeStatus &Out, DecodeStatus In) {
231  switch (In) {
232  case MCDisassembler::Success:
233  // Out stays the same.
234  return true;
235  case MCDisassembler::SoftFail:
236  Out = In;
237  return true;
238  case MCDisassembler::Fail:
239  Out = In;
240  return false;
241  }
242  llvm_unreachable("Invalid DecodeStatus!");
243 }
244 
245 #include "AArch64GenDisassemblerTables.inc"
246 #include "AArch64GenInstrInfo.inc"
247 
248 #define Success MCDisassembler::Success
249 #define Fail MCDisassembler::Fail
250 #define SoftFail MCDisassembler::SoftFail
251 
252 static MCDisassembler *createAArch64Disassembler(const Target &T,
253  const MCSubtargetInfo &STI,
254  MCContext &Ctx) {
255  return new AArch64Disassembler(STI, Ctx);
256 }
257 
258 DecodeStatus AArch64Disassembler::getInstruction(MCInst &MI, uint64_t &Size,
259  ArrayRef<uint8_t> Bytes,
260  uint64_t Address,
261  raw_ostream &CS) const {
262  CommentStream = &CS;
263 
264  Size = 0;
265  // We want to read exactly 4 bytes of data.
266  if (Bytes.size() < 4)
267  return Fail;
268  Size = 4;
269 
270  // Encoded as a small-endian 32-bit word in the stream.
271  uint32_t Insn =
272  (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
273 
274  const uint8_t *Tables[] = {DecoderTable32, DecoderTableFallback32};
275 
276  for (auto Table : Tables) {
277  DecodeStatus Result =
278  decodeInstruction(Table, MI, Insn, Address, this, STI);
279  if (Result != MCDisassembler::Fail)
280  return Result;
281  }
282 
283  return MCDisassembler::Fail;
284 }
285 
286 static MCSymbolizer *
287 createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo,
288  LLVMSymbolLookupCallback SymbolLookUp,
289  void *DisInfo, MCContext *Ctx,
290  std::unique_ptr<MCRelocationInfo> &&RelInfo) {
291  return new AArch64ExternalSymbolizer(*Ctx, std::move(RelInfo), GetOpInfo,
292  SymbolLookUp, DisInfo);
293 }
294 
295 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64Disassembler() {
296  TargetRegistry::RegisterMCDisassembler(getTheAArch64leTarget(),
297  createAArch64Disassembler);
298  TargetRegistry::RegisterMCDisassembler(getTheAArch64beTarget(),
299  createAArch64Disassembler);
300  TargetRegistry::RegisterMCSymbolizer(getTheAArch64leTarget(),
301  createAArch64ExternalSymbolizer);
302  TargetRegistry::RegisterMCSymbolizer(getTheAArch64beTarget(),
303  createAArch64ExternalSymbolizer);
304  TargetRegistry::RegisterMCDisassembler(getTheAArch64_32Target(),
305  createAArch64Disassembler);
306  TargetRegistry::RegisterMCSymbolizer(getTheAArch64_32Target(),
307  createAArch64ExternalSymbolizer);
308 
309  TargetRegistry::RegisterMCDisassembler(getTheARM64Target(),
310  createAArch64Disassembler);
311  TargetRegistry::RegisterMCSymbolizer(getTheARM64Target(),
312  createAArch64ExternalSymbolizer);
313  TargetRegistry::RegisterMCDisassembler(getTheARM64_32Target(),
314  createAArch64Disassembler);
315  TargetRegistry::RegisterMCSymbolizer(getTheARM64_32Target(),
316  createAArch64ExternalSymbolizer);
317 }
318 
319 static const unsigned FPR128DecoderTable[] = {
320  AArch64::Q0, AArch64::Q1, AArch64::Q2, AArch64::Q3, AArch64::Q4,
321  AArch64::Q5, AArch64::Q6, AArch64::Q7, AArch64::Q8, AArch64::Q9,
322  AArch64::Q10, AArch64::Q11, AArch64::Q12, AArch64::Q13, AArch64::Q14,
323  AArch64::Q15, AArch64::Q16, AArch64::Q17, AArch64::Q18, AArch64::Q19,
324  AArch64::Q20, AArch64::Q21, AArch64::Q22, AArch64::Q23, AArch64::Q24,
325  AArch64::Q25, AArch64::Q26, AArch64::Q27, AArch64::Q28, AArch64::Q29,
326  AArch64::Q30, AArch64::Q31
327 };
328 
329 static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo,
330  uint64_t Addr,
331  const void *Decoder) {
332  if (RegNo > 31)
333  return Fail;
334 
335  unsigned Register = FPR128DecoderTable[RegNo];
336  Inst.addOperand(MCOperand::createReg(Register));
337  return Success;
338 }
339 
340 static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo,
341  uint64_t Addr,
342  const void *Decoder) {
343  if (RegNo > 15)
344  return Fail;
345  return DecodeFPR128RegisterClass(Inst, RegNo, Addr, Decoder);
346 }
347 
348 static const unsigned FPR64DecoderTable[] = {
349  AArch64::D0, AArch64::D1, AArch64::D2, AArch64::D3, AArch64::D4,
350  AArch64::D5, AArch64::D6, AArch64::D7, AArch64::D8, AArch64::D9,
351  AArch64::D10, AArch64::D11, AArch64::D12, AArch64::D13, AArch64::D14,
352  AArch64::D15, AArch64::D16, AArch64::D17, AArch64::D18, AArch64::D19,
353  AArch64::D20, AArch64::D21, AArch64::D22, AArch64::D23, AArch64::D24,
354  AArch64::D25, AArch64::D26, AArch64::D27, AArch64::D28, AArch64::D29,
355  AArch64::D30, AArch64::D31
356 };
357 
358 static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo,
359  uint64_t Addr,
360  const void *Decoder) {
361  if (RegNo > 31)
362  return Fail;
363 
364  unsigned Register = FPR64DecoderTable[RegNo];
365  Inst.addOperand(MCOperand::createReg(Register));
366  return Success;
367 }
368 
369 static const unsigned FPR32DecoderTable[] = {
370  AArch64::S0, AArch64::S1, AArch64::S2, AArch64::S3, AArch64::S4,
371  AArch64::S5, AArch64::S6, AArch64::S7, AArch64::S8, AArch64::S9,
372  AArch64::S10, AArch64::S11, AArch64::S12, AArch64::S13, AArch64::S14,
373  AArch64::S15, AArch64::S16, AArch64::S17, AArch64::S18, AArch64::S19,
374  AArch64::S20, AArch64::S21, AArch64::S22, AArch64::S23, AArch64::S24,
375  AArch64::S25, AArch64::S26, AArch64::S27, AArch64::S28, AArch64::S29,
376  AArch64::S30, AArch64::S31
377 };
378 
379 static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo,
380  uint64_t Addr,
381  const void *Decoder) {
382  if (RegNo > 31)
383  return Fail;
384 
385  unsigned Register = FPR32DecoderTable[RegNo];
386  Inst.addOperand(MCOperand::createReg(Register));
387  return Success;
388 }
389 
390 static const unsigned FPR16DecoderTable[] = {
391  AArch64::H0, AArch64::H1, AArch64::H2, AArch64::H3, AArch64::H4,
392  AArch64::H5, AArch64::H6, AArch64::H7, AArch64::H8, AArch64::H9,
393  AArch64::H10, AArch64::H11, AArch64::H12, AArch64::H13, AArch64::H14,
394  AArch64::H15, AArch64::H16, AArch64::H17, AArch64::H18, AArch64::H19,
395  AArch64::H20, AArch64::H21, AArch64::H22, AArch64::H23, AArch64::H24,
396  AArch64::H25, AArch64::H26, AArch64::H27, AArch64::H28, AArch64::H29,
397  AArch64::H30, AArch64::H31
398 };
399 
400 static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo,
401  uint64_t Addr,
402  const void *Decoder) {
403  if (RegNo > 31)
404  return Fail;
405 
406  unsigned Register = FPR16DecoderTable[RegNo];
407  Inst.addOperand(MCOperand::createReg(Register));
408  return Success;
409 }
410 
411 static const unsigned FPR8DecoderTable[] = {
412  AArch64::B0, AArch64::B1, AArch64::B2, AArch64::B3, AArch64::B4,
413  AArch64::B5, AArch64::B6, AArch64::B7, AArch64::B8, AArch64::B9,
414  AArch64::B10, AArch64::B11, AArch64::B12, AArch64::B13, AArch64::B14,
415  AArch64::B15, AArch64::B16, AArch64::B17, AArch64::B18, AArch64::B19,
416  AArch64::B20, AArch64::B21, AArch64::B22, AArch64::B23, AArch64::B24,
417  AArch64::B25, AArch64::B26, AArch64::B27, AArch64::B28, AArch64::B29,
418  AArch64::B30, AArch64::B31
419 };
420 
421 static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo,
422  uint64_t Addr,
423  const void *Decoder) {
424  if (RegNo > 31)
425  return Fail;
426 
427  unsigned Register = FPR8DecoderTable[RegNo];
428  Inst.addOperand(MCOperand::createReg(Register));
429  return Success;
430 }
431 
432 static const unsigned GPR64DecoderTable[] = {
433  AArch64::X0, AArch64::X1, AArch64::X2, AArch64::X3, AArch64::X4,
434  AArch64::X5, AArch64::X6, AArch64::X7, AArch64::X8, AArch64::X9,
435  AArch64::X10, AArch64::X11, AArch64::X12, AArch64::X13, AArch64::X14,
436  AArch64::X15, AArch64::X16, AArch64::X17, AArch64::X18, AArch64::X19,
437  AArch64::X20, AArch64::X21, AArch64::X22, AArch64::X23, AArch64::X24,
438  AArch64::X25, AArch64::X26, AArch64::X27, AArch64::X28, AArch64::FP,
439  AArch64::LR, AArch64::XZR
440 };
441 
442 static DecodeStatus DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo,
443  uint64_t Addr,
444  const void *Decoder) {
445  if (RegNo > 30)
446  return Fail;
447 
448  unsigned Register = GPR64DecoderTable[RegNo];
449  Inst.addOperand(MCOperand::createReg(Register));
450  return Success;
451 }
452 
453 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo,
454  uint64_t Addr,
455  const void *Decoder) {
456  if (RegNo > 31)
457  return Fail;
458 
459  unsigned Register = GPR64DecoderTable[RegNo];
460  Inst.addOperand(MCOperand::createReg(Register));
461  return Success;
462 }
463 
464 static const unsigned GPR64x8DecoderTable[] = {
465  AArch64::X0_X1_X2_X3_X4_X5_X6_X7,
466  AArch64::X2_X3_X4_X5_X6_X7_X8_X9,
467  AArch64::X4_X5_X6_X7_X8_X9_X10_X11,
468  AArch64::X6_X7_X8_X9_X10_X11_X12_X13,
469  AArch64::X8_X9_X10_X11_X12_X13_X14_X15,
470  AArch64::X10_X11_X12_X13_X14_X15_X16_X17,
471  AArch64::X12_X13_X14_X15_X16_X17_X18_X19,
472  AArch64::X14_X15_X16_X17_X18_X19_X20_X21,
473  AArch64::X16_X17_X18_X19_X20_X21_X22_X23,
474  AArch64::X18_X19_X20_X21_X22_X23_X24_X25,
475  AArch64::X20_X21_X22_X23_X24_X25_X26_X27,
476  AArch64::X22_X23_X24_X25_X26_X27_X28_FP,
477 };
478 
479 static DecodeStatus DecodeGPR64x8ClassRegisterClass(MCInst &Inst,
480  unsigned RegNo,
481  uint64_t Address,
482  const void *Decoder) {
483  if (RegNo > 22)
484  return Fail;
485  if (RegNo & 1)
486  return Fail;
487 
488  unsigned Register = GPR64x8DecoderTable[RegNo >> 1];
489  Inst.addOperand(MCOperand::createReg(Register));
490  return Success;
491 }
492 
493 static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo,
494  uint64_t Addr,
495  const void *Decoder) {
496  if (RegNo > 31)
497  return Fail;
498  unsigned Register = GPR64DecoderTable[RegNo];
499  if (Register == AArch64::XZR)
500  Register = AArch64::SP;
501  Inst.addOperand(MCOperand::createReg(Register));
502  return Success;
503 }
504 
505 static const unsigned GPR32DecoderTable[] = {
506  AArch64::W0, AArch64::W1, AArch64::W2, AArch64::W3, AArch64::W4,
507  AArch64::W5, AArch64::W6, AArch64::W7, AArch64::W8, AArch64::W9,
508  AArch64::W10, AArch64::W11, AArch64::W12, AArch64::W13, AArch64::W14,
509  AArch64::W15, AArch64::W16, AArch64::W17, AArch64::W18, AArch64::W19,
510  AArch64::W20, AArch64::W21, AArch64::W22, AArch64::W23, AArch64::W24,
511  AArch64::W25, AArch64::W26, AArch64::W27, AArch64::W28, AArch64::W29,
512  AArch64::W30, AArch64::WZR
513 };
514 
515 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo,
516  uint64_t Addr,
517  const void *Decoder) {
518  if (RegNo > 31)
519  return Fail;
520 
521  unsigned Register = GPR32DecoderTable[RegNo];
522  Inst.addOperand(MCOperand::createReg(Register));
523  return Success;
524 }
525 
526 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo,
527  uint64_t Addr,
528  const void *Decoder) {
529  if (RegNo > 31)
530  return Fail;
531 
532  unsigned Register = GPR32DecoderTable[RegNo];
533  if (Register == AArch64::WZR)
534  Register = AArch64::WSP;
535  Inst.addOperand(MCOperand::createReg(Register));
536  return Success;
537 }
538 static const unsigned ZPRDecoderTable[] = {
539  AArch64::Z0, AArch64::Z1, AArch64::Z2, AArch64::Z3,
540  AArch64::Z4, AArch64::Z5, AArch64::Z6, AArch64::Z7,
541  AArch64::Z8, AArch64::Z9, AArch64::Z10, AArch64::Z11,
542  AArch64::Z12, AArch64::Z13, AArch64::Z14, AArch64::Z15,
543  AArch64::Z16, AArch64::Z17, AArch64::Z18, AArch64::Z19,
544  AArch64::Z20, AArch64::Z21, AArch64::Z22, AArch64::Z23,
545  AArch64::Z24, AArch64::Z25, AArch64::Z26, AArch64::Z27,
546  AArch64::Z28, AArch64::Z29, AArch64::Z30, AArch64::Z31
547 };
548 
549 static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo,
550  uint64_t Address,
551  const void* Decoder) {
552  if (RegNo > 31)
553  return Fail;
554 
555  unsigned Register = ZPRDecoderTable[RegNo];
556  Inst.addOperand(MCOperand::createReg(Register));
557  return Success;
558 }
559 
560 static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo,
561  uint64_t Address,
562  const void *Decoder) {
563  if (RegNo > 15)
564  return Fail;
565  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
566 }
567 
568 static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
569  uint64_t Address,
570  const void *Decoder) {
571  if (RegNo > 7)
572  return Fail;
573  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
574 }
575 
576 static const unsigned ZZDecoderTable[] = {
577  AArch64::Z0_Z1, AArch64::Z1_Z2, AArch64::Z2_Z3, AArch64::Z3_Z4,
578  AArch64::Z4_Z5, AArch64::Z5_Z6, AArch64::Z6_Z7, AArch64::Z7_Z8,
579  AArch64::Z8_Z9, AArch64::Z9_Z10, AArch64::Z10_Z11, AArch64::Z11_Z12,
580  AArch64::Z12_Z13, AArch64::Z13_Z14, AArch64::Z14_Z15, AArch64::Z15_Z16,
581  AArch64::Z16_Z17, AArch64::Z17_Z18, AArch64::Z18_Z19, AArch64::Z19_Z20,
582  AArch64::Z20_Z21, AArch64::Z21_Z22, AArch64::Z22_Z23, AArch64::Z23_Z24,
583  AArch64::Z24_Z25, AArch64::Z25_Z26, AArch64::Z26_Z27, AArch64::Z27_Z28,
584  AArch64::Z28_Z29, AArch64::Z29_Z30, AArch64::Z30_Z31, AArch64::Z31_Z0
585 };
586 
587 static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo,
588  uint64_t Address,
589  const void* Decoder) {
590  if (RegNo > 31)
591  return Fail;
592  unsigned Register = ZZDecoderTable[RegNo];
593  Inst.addOperand(MCOperand::createReg(Register));
594  return Success;
595 }
596 
597 static const unsigned ZZZDecoderTable[] = {
598  AArch64::Z0_Z1_Z2, AArch64::Z1_Z2_Z3, AArch64::Z2_Z3_Z4,
599  AArch64::Z3_Z4_Z5, AArch64::Z4_Z5_Z6, AArch64::Z5_Z6_Z7,
600  AArch64::Z6_Z7_Z8, AArch64::Z7_Z8_Z9, AArch64::Z8_Z9_Z10,
601  AArch64::Z9_Z10_Z11, AArch64::Z10_Z11_Z12, AArch64::Z11_Z12_Z13,
602  AArch64::Z12_Z13_Z14, AArch64::Z13_Z14_Z15, AArch64::Z14_Z15_Z16,
603  AArch64::Z15_Z16_Z17, AArch64::Z16_Z17_Z18, AArch64::Z17_Z18_Z19,
604  AArch64::Z18_Z19_Z20, AArch64::Z19_Z20_Z21, AArch64::Z20_Z21_Z22,
605  AArch64::Z21_Z22_Z23, AArch64::Z22_Z23_Z24, AArch64::Z23_Z24_Z25,
606  AArch64::Z24_Z25_Z26, AArch64::Z25_Z26_Z27, AArch64::Z26_Z27_Z28,
607  AArch64::Z27_Z28_Z29, AArch64::Z28_Z29_Z30, AArch64::Z29_Z30_Z31,
608  AArch64::Z30_Z31_Z0, AArch64::Z31_Z0_Z1
609 };
610 
611 static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo,
612  uint64_t Address,
613  const void* Decoder) {
614  if (RegNo > 31)
615  return Fail;
616  unsigned Register = ZZZDecoderTable[RegNo];
617  Inst.addOperand(MCOperand::createReg(Register));
618  return Success;
619 }
620 
621 static const unsigned ZZZZDecoderTable[] = {
622  AArch64::Z0_Z1_Z2_Z3, AArch64::Z1_Z2_Z3_Z4, AArch64::Z2_Z3_Z4_Z5,
623  AArch64::Z3_Z4_Z5_Z6, AArch64::Z4_Z5_Z6_Z7, AArch64::Z5_Z6_Z7_Z8,
624  AArch64::Z6_Z7_Z8_Z9, AArch64::Z7_Z8_Z9_Z10, AArch64::Z8_Z9_Z10_Z11,
625  AArch64::Z9_Z10_Z11_Z12, AArch64::Z10_Z11_Z12_Z13, AArch64::Z11_Z12_Z13_Z14,
626  AArch64::Z12_Z13_Z14_Z15, AArch64::Z13_Z14_Z15_Z16, AArch64::Z14_Z15_Z16_Z17,
627  AArch64::Z15_Z16_Z17_Z18, AArch64::Z16_Z17_Z18_Z19, AArch64::Z17_Z18_Z19_Z20,
628  AArch64::Z18_Z19_Z20_Z21, AArch64::Z19_Z20_Z21_Z22, AArch64::Z20_Z21_Z22_Z23,
629  AArch64::Z21_Z22_Z23_Z24, AArch64::Z22_Z23_Z24_Z25, AArch64::Z23_Z24_Z25_Z26,
630  AArch64::Z24_Z25_Z26_Z27, AArch64::Z25_Z26_Z27_Z28, AArch64::Z26_Z27_Z28_Z29,
631  AArch64::Z27_Z28_Z29_Z30, AArch64::Z28_Z29_Z30_Z31, AArch64::Z29_Z30_Z31_Z0,
632  AArch64::Z30_Z31_Z0_Z1, AArch64::Z31_Z0_Z1_Z2
633 };
634 
635 static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo,
636  uint64_t Address,
637  const void* Decoder) {
638  if (RegNo > 31)
639  return Fail;
640  unsigned Register = ZZZZDecoderTable[RegNo];
641  Inst.addOperand(MCOperand::createReg(Register));
642  return Success;
643 }
644 
645 static const unsigned PPRDecoderTable[] = {
646  AArch64::P0, AArch64::P1, AArch64::P2, AArch64::P3,
647  AArch64::P4, AArch64::P5, AArch64::P6, AArch64::P7,
648  AArch64::P8, AArch64::P9, AArch64::P10, AArch64::P11,
649  AArch64::P12, AArch64::P13, AArch64::P14, AArch64::P15
650 };
651 
652 static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo,
653  uint64_t Addr, const void *Decoder) {
654  if (RegNo > 15)
655  return Fail;
656 
657  unsigned Register = PPRDecoderTable[RegNo];
658  Inst.addOperand(MCOperand::createReg(Register));
659  return Success;
660 }
661 
662 static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
663  uint64_t Addr,
664  const void* Decoder) {
665  if (RegNo > 7)
666  return Fail;
667 
668  // Just reuse the PPR decode table
669  return DecodePPRRegisterClass(Inst, RegNo, Addr, Decoder);
670 }
671 
672 static const unsigned VectorDecoderTable[] = {
673  AArch64::Q0, AArch64::Q1, AArch64::Q2, AArch64::Q3, AArch64::Q4,
674  AArch64::Q5, AArch64::Q6, AArch64::Q7, AArch64::Q8, AArch64::Q9,
675  AArch64::Q10, AArch64::Q11, AArch64::Q12, AArch64::Q13, AArch64::Q14,
676  AArch64::Q15, AArch64::Q16, AArch64::Q17, AArch64::Q18, AArch64::Q19,
677  AArch64::Q20, AArch64::Q21, AArch64::Q22, AArch64::Q23, AArch64::Q24,
678  AArch64::Q25, AArch64::Q26, AArch64::Q27, AArch64::Q28, AArch64::Q29,
679  AArch64::Q30, AArch64::Q31
680 };
681 
682 static DecodeStatus DecodeVectorRegisterClass(MCInst &Inst, unsigned RegNo,
683  uint64_t Addr,
684  const void *Decoder) {
685  if (RegNo > 31)
686  return Fail;
687 
688  unsigned Register = VectorDecoderTable[RegNo];
689  Inst.addOperand(MCOperand::createReg(Register));
690  return Success;
691 }
692 
693 static const unsigned QQDecoderTable[] = {
694  AArch64::Q0_Q1, AArch64::Q1_Q2, AArch64::Q2_Q3, AArch64::Q3_Q4,
695  AArch64::Q4_Q5, AArch64::Q5_Q6, AArch64::Q6_Q7, AArch64::Q7_Q8,
696  AArch64::Q8_Q9, AArch64::Q9_Q10, AArch64::Q10_Q11, AArch64::Q11_Q12,
697  AArch64::Q12_Q13, AArch64::Q13_Q14, AArch64::Q14_Q15, AArch64::Q15_Q16,
698  AArch64::Q16_Q17, AArch64::Q17_Q18, AArch64::Q18_Q19, AArch64::Q19_Q20,
699  AArch64::Q20_Q21, AArch64::Q21_Q22, AArch64::Q22_Q23, AArch64::Q23_Q24,
700  AArch64::Q24_Q25, AArch64::Q25_Q26, AArch64::Q26_Q27, AArch64::Q27_Q28,
701  AArch64::Q28_Q29, AArch64::Q29_Q30, AArch64::Q30_Q31, AArch64::Q31_Q0
702 };
703 
704 static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo,
705  uint64_t Addr, const void *Decoder) {
706  if (RegNo > 31)
707  return Fail;
708  unsigned Register = QQDecoderTable[RegNo];
709  Inst.addOperand(MCOperand::createReg(Register));
710  return Success;
711 }
712 
713 static const unsigned QQQDecoderTable[] = {
714  AArch64::Q0_Q1_Q2, AArch64::Q1_Q2_Q3, AArch64::Q2_Q3_Q4,
715  AArch64::Q3_Q4_Q5, AArch64::Q4_Q5_Q6, AArch64::Q5_Q6_Q7,
716  AArch64::Q6_Q7_Q8, AArch64::Q7_Q8_Q9, AArch64::Q8_Q9_Q10,
717  AArch64::Q9_Q10_Q11, AArch64::Q10_Q11_Q12, AArch64::Q11_Q12_Q13,
718  AArch64::Q12_Q13_Q14, AArch64::Q13_Q14_Q15, AArch64::Q14_Q15_Q16,
719  AArch64::Q15_Q16_Q17, AArch64::Q16_Q17_Q18, AArch64::Q17_Q18_Q19,
720  AArch64::Q18_Q19_Q20, AArch64::Q19_Q20_Q21, AArch64::Q20_Q21_Q22,
721  AArch64::Q21_Q22_Q23, AArch64::Q22_Q23_Q24, AArch64::Q23_Q24_Q25,
722  AArch64::Q24_Q25_Q26, AArch64::Q25_Q26_Q27, AArch64::Q26_Q27_Q28,
723  AArch64::Q27_Q28_Q29, AArch64::Q28_Q29_Q30, AArch64::Q29_Q30_Q31,
724  AArch64::Q30_Q31_Q0, AArch64::Q31_Q0_Q1
725 };
726 
727 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo,
728  uint64_t Addr, const void *Decoder) {
729  if (RegNo > 31)
730  return Fail;
731  unsigned Register = QQQDecoderTable[RegNo];
732  Inst.addOperand(MCOperand::createReg(Register));
733  return Success;
734 }
735 
736 static const unsigned QQQQDecoderTable[] = {
737  AArch64::Q0_Q1_Q2_Q3, AArch64::Q1_Q2_Q3_Q4, AArch64::Q2_Q3_Q4_Q5,
738  AArch64::Q3_Q4_Q5_Q6, AArch64::Q4_Q5_Q6_Q7, AArch64::Q5_Q6_Q7_Q8,
739  AArch64::Q6_Q7_Q8_Q9, AArch64::Q7_Q8_Q9_Q10, AArch64::Q8_Q9_Q10_Q11,
740  AArch64::Q9_Q10_Q11_Q12, AArch64::Q10_Q11_Q12_Q13, AArch64::Q11_Q12_Q13_Q14,
741  AArch64::Q12_Q13_Q14_Q15, AArch64::Q13_Q14_Q15_Q16, AArch64::Q14_Q15_Q16_Q17,
742  AArch64::Q15_Q16_Q17_Q18, AArch64::Q16_Q17_Q18_Q19, AArch64::Q17_Q18_Q19_Q20,
743  AArch64::Q18_Q19_Q20_Q21, AArch64::Q19_Q20_Q21_Q22, AArch64::Q20_Q21_Q22_Q23,
744  AArch64::Q21_Q22_Q23_Q24, AArch64::Q22_Q23_Q24_Q25, AArch64::Q23_Q24_Q25_Q26,
745  AArch64::Q24_Q25_Q26_Q27, AArch64::Q25_Q26_Q27_Q28, AArch64::Q26_Q27_Q28_Q29,
746  AArch64::Q27_Q28_Q29_Q30, AArch64::Q28_Q29_Q30_Q31, AArch64::Q29_Q30_Q31_Q0,
747  AArch64::Q30_Q31_Q0_Q1, AArch64::Q31_Q0_Q1_Q2
748 };
749 
750 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo,
751  uint64_t Addr,
752  const void *Decoder) {
753  if (RegNo > 31)
754  return Fail;
755  unsigned Register = QQQQDecoderTable[RegNo];
756  Inst.addOperand(MCOperand::createReg(Register));
757  return Success;
758 }
759 
760 static const unsigned DDDecoderTable[] = {
761  AArch64::D0_D1, AArch64::D1_D2, AArch64::D2_D3, AArch64::D3_D4,
762  AArch64::D4_D5, AArch64::D5_D6, AArch64::D6_D7, AArch64::D7_D8,
763  AArch64::D8_D9, AArch64::D9_D10, AArch64::D10_D11, AArch64::D11_D12,
764  AArch64::D12_D13, AArch64::D13_D14, AArch64::D14_D15, AArch64::D15_D16,
765  AArch64::D16_D17, AArch64::D17_D18, AArch64::D18_D19, AArch64::D19_D20,
766  AArch64::D20_D21, AArch64::D21_D22, AArch64::D22_D23, AArch64::D23_D24,
767  AArch64::D24_D25, AArch64::D25_D26, AArch64::D26_D27, AArch64::D27_D28,
768  AArch64::D28_D29, AArch64::D29_D30, AArch64::D30_D31, AArch64::D31_D0
769 };
770 
771 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo,
772  uint64_t Addr, const void *Decoder) {
773  if (RegNo > 31)
774  return Fail;
775  unsigned Register = DDDecoderTable[RegNo];
776  Inst.addOperand(MCOperand::createReg(Register));
777  return Success;
778 }
779 
780 static const unsigned DDDDecoderTable[] = {
781  AArch64::D0_D1_D2, AArch64::D1_D2_D3, AArch64::D2_D3_D4,
782  AArch64::D3_D4_D5, AArch64::D4_D5_D6, AArch64::D5_D6_D7,
783  AArch64::D6_D7_D8, AArch64::D7_D8_D9, AArch64::D8_D9_D10,
784  AArch64::D9_D10_D11, AArch64::D10_D11_D12, AArch64::D11_D12_D13,
785  AArch64::D12_D13_D14, AArch64::D13_D14_D15, AArch64::D14_D15_D16,
786  AArch64::D15_D16_D17, AArch64::D16_D17_D18, AArch64::D17_D18_D19,
787  AArch64::D18_D19_D20, AArch64::D19_D20_D21, AArch64::D20_D21_D22,
788  AArch64::D21_D22_D23, AArch64::D22_D23_D24, AArch64::D23_D24_D25,
789  AArch64::D24_D25_D26, AArch64::D25_D26_D27, AArch64::D26_D27_D28,
790  AArch64::D27_D28_D29, AArch64::D28_D29_D30, AArch64::D29_D30_D31,
791  AArch64::D30_D31_D0, AArch64::D31_D0_D1
792 };
793 
794 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo,
795  uint64_t Addr, const void *Decoder) {
796  if (RegNo > 31)
797  return Fail;
798  unsigned Register = DDDDecoderTable[RegNo];
799  Inst.addOperand(MCOperand::createReg(Register));
800  return Success;
801 }
802 
803 static const unsigned DDDDDecoderTable[] = {
804  AArch64::D0_D1_D2_D3, AArch64::D1_D2_D3_D4, AArch64::D2_D3_D4_D5,
805  AArch64::D3_D4_D5_D6, AArch64::D4_D5_D6_D7, AArch64::D5_D6_D7_D8,
806  AArch64::D6_D7_D8_D9, AArch64::D7_D8_D9_D10, AArch64::D8_D9_D10_D11,
807  AArch64::D9_D10_D11_D12, AArch64::D10_D11_D12_D13, AArch64::D11_D12_D13_D14,
808  AArch64::D12_D13_D14_D15, AArch64::D13_D14_D15_D16, AArch64::D14_D15_D16_D17,
809  AArch64::D15_D16_D17_D18, AArch64::D16_D17_D18_D19, AArch64::D17_D18_D19_D20,
810  AArch64::D18_D19_D20_D21, AArch64::D19_D20_D21_D22, AArch64::D20_D21_D22_D23,
811  AArch64::D21_D22_D23_D24, AArch64::D22_D23_D24_D25, AArch64::D23_D24_D25_D26,
812  AArch64::D24_D25_D26_D27, AArch64::D25_D26_D27_D28, AArch64::D26_D27_D28_D29,
813  AArch64::D27_D28_D29_D30, AArch64::D28_D29_D30_D31, AArch64::D29_D30_D31_D0,
814  AArch64::D30_D31_D0_D1, AArch64::D31_D0_D1_D2
815 };
816 
817 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo,
818  uint64_t Addr,
819  const void *Decoder) {
820  if (RegNo > 31)
821  return Fail;
822  unsigned Register = DDDDDecoderTable[RegNo];
823  Inst.addOperand(MCOperand::createReg(Register));
824  return Success;
825 }
826 
827 static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm,
828  uint64_t Addr,
829  const void *Decoder) {
830  // scale{5} is asserted as 1 in tblgen.
831  Imm |= 0x20;
832  Inst.addOperand(MCOperand::createImm(64 - Imm));
833  return Success;
834 }
835 
836 static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm,
837  uint64_t Addr,
838  const void *Decoder) {
839  Inst.addOperand(MCOperand::createImm(64 - Imm));
840  return Success;
841 }
842 
843 static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm,
844  uint64_t Addr, const void *Decoder) {
845  int64_t ImmVal = Imm;
846  const AArch64Disassembler *Dis =
847  static_cast<const AArch64Disassembler *>(Decoder);
848 
849  // Sign-extend 19-bit immediate.
850  if (ImmVal & (1 << (19 - 1)))
851  ImmVal |= ~((1LL << 19) - 1);
852 
853  if (!Dis->tryAddingSymbolicOperand(Inst, ImmVal * 4, Addr,
854  Inst.getOpcode() != AArch64::LDRXl, 0, 4))
855  Inst.addOperand(MCOperand::createImm(ImmVal));
856  return Success;
857 }
858 
859 static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm,
860  uint64_t Address, const void *Decoder) {
861  Inst.addOperand(MCOperand::createImm((Imm >> 1) & 1));
862  Inst.addOperand(MCOperand::createImm(Imm & 1));
863  return Success;
864 }
865 
866 static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm,
867  uint64_t Address,
868  const void *Decoder) {
869  Inst.addOperand(MCOperand::createImm(Imm));
870 
871  // Every system register in the encoding space is valid with the syntax
872  // S<op0>_<op1>_<Cn>_<Cm>_<op2>, so decoding system registers always succeeds.
873  return Success;
874 }
875 
876 static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm,
877  uint64_t Address,
878  const void *Decoder) {
879  Inst.addOperand(MCOperand::createImm(Imm));
880 
881  return Success;
882 }
883 
884 static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn,
885  uint64_t Address,
886  const void *Decoder) {
887  // This decoder exists to add the dummy Lane operand to the MCInst, which must
888  // be 1 in assembly but has no other real manifestation.
889  unsigned Rd = fieldFromInstruction(Insn, 0, 5);
890  unsigned Rn = fieldFromInstruction(Insn, 5, 5);
891  unsigned IsToVec = fieldFromInstruction(Insn, 16, 1);
892 
893  if (IsToVec) {
894  DecodeFPR128RegisterClass(Inst, Rd, Address, Decoder);
895  DecodeGPR64RegisterClass(Inst, Rn, Address, Decoder);
896  } else {
897  DecodeGPR64RegisterClass(Inst, Rd, Address, Decoder);
898  DecodeFPR128RegisterClass(Inst, Rn, Address, Decoder);
899  }
900 
901  // Add the lane
902  Inst.addOperand(MCOperand::createImm(1));
903 
904  return Success;
905 }
906 
907 static DecodeStatus DecodeVecShiftRImm(MCInst &Inst, unsigned Imm,
908  unsigned Add) {
909  Inst.addOperand(MCOperand::createImm(Add - Imm));
910  return Success;
911 }
912 
913 static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm,
914  unsigned Add) {
915  Inst.addOperand(MCOperand::createImm((Imm + Add) & (Add - 1)));
916  return Success;
917 }
918 
919 static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm,
920  uint64_t Addr, const void *Decoder) {
921  return DecodeVecShiftRImm(Inst, Imm, 64);
922 }
923 
924 static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm,
925  uint64_t Addr,
926  const void *Decoder) {
927  return DecodeVecShiftRImm(Inst, Imm | 0x20, 64);
928 }
929 
930 static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm,
931  uint64_t Addr, const void *Decoder) {
932  return DecodeVecShiftRImm(Inst, Imm, 32);
933 }
934 
935 static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm,
936  uint64_t Addr,
937  const void *Decoder) {
938  return DecodeVecShiftRImm(Inst, Imm | 0x10, 32);
939 }
940 
941 static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm,
942  uint64_t Addr, const void *Decoder) {
943  return DecodeVecShiftRImm(Inst, Imm, 16);
944 }
945 
946 static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm,
947  uint64_t Addr,
948  const void *Decoder) {
949  return DecodeVecShiftRImm(Inst, Imm | 0x8, 16);
950 }
951 
952 static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm,
953  uint64_t Addr, const void *Decoder) {
954  return DecodeVecShiftRImm(Inst, Imm, 8);
955 }
956 
957 static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm,
958  uint64_t Addr, const void *Decoder) {
959  return DecodeVecShiftLImm(Inst, Imm, 64);
960 }
961 
962 static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm,
963  uint64_t Addr, const void *Decoder) {
964  return DecodeVecShiftLImm(Inst, Imm, 32);
965 }
966 
967 static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm,
968  uint64_t Addr, const void *Decoder) {
969  return DecodeVecShiftLImm(Inst, Imm, 16);
970 }
971 
972 static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm,
973  uint64_t Addr, const void *Decoder) {
974  return DecodeVecShiftLImm(Inst, Imm, 8);
975 }
976 
977 static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn,
978  uint64_t Addr,
979  const void *Decoder) {
980  unsigned Rd = fieldFromInstruction(insn, 0, 5);
981  unsigned Rn = fieldFromInstruction(insn, 5, 5);
982  unsigned Rm = fieldFromInstruction(insn, 16, 5);
983  unsigned shiftHi = fieldFromInstruction(insn, 22, 2);
984  unsigned shiftLo = fieldFromInstruction(insn, 10, 6);
985  unsigned shift = (shiftHi << 6) | shiftLo;
986  switch (Inst.getOpcode()) {
987  default:
988  return Fail;
989  case AArch64::ADDWrs:
990  case AArch64::ADDSWrs:
991  case AArch64::SUBWrs:
992  case AArch64::SUBSWrs:
993  // if shift == '11' then ReservedValue()
994  if (shiftHi == 0x3)
995  return Fail;
996  LLVM_FALLTHROUGH;
997  case AArch64::ANDWrs:
998  case AArch64::ANDSWrs:
999  case AArch64::BICWrs:
1000  case AArch64::BICSWrs:
1001  case AArch64::ORRWrs:
1002  case AArch64::ORNWrs:
1003  case AArch64::EORWrs:
1004  case AArch64::EONWrs: {
1005  // if sf == '0' and imm6<5> == '1' then ReservedValue()
1006  if (shiftLo >> 5 == 1)
1007  return Fail;
1008  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1009  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
1010  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1011  break;
1012  }
1013  case AArch64::ADDXrs:
1014  case AArch64::ADDSXrs:
1015  case AArch64::SUBXrs:
1016  case AArch64::SUBSXrs:
1017  // if shift == '11' then ReservedValue()
1018  if (shiftHi == 0x3)
1019  return Fail;
1020  LLVM_FALLTHROUGH;
1021  case AArch64::ANDXrs:
1022  case AArch64::ANDSXrs:
1023  case AArch64::BICXrs:
1024  case AArch64::BICSXrs:
1025  case AArch64::ORRXrs:
1026  case AArch64::ORNXrs:
1027  case AArch64::EORXrs:
1028  case AArch64::EONXrs:
1029  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1030  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
1031  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1032  break;
1033  }
1034 
1035  Inst.addOperand(MCOperand::createImm(shift));
1036  return Success;
1037 }
1038 
1039 static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn,
1040  uint64_t Addr,
1041  const void *Decoder) {
1042  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1043  unsigned imm = fieldFromInstruction(insn, 5, 16);
1044  unsigned shift = fieldFromInstruction(insn, 21, 2);
1045  shift <<= 4;
1046  switch (Inst.getOpcode()) {
1047  default:
1048  return Fail;
1049  case AArch64::MOVZWi:
1050  case AArch64::MOVNWi:
1051  case AArch64::MOVKWi:
1052  if (shift & (1U << 5))
1053  return Fail;
1054  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1055  break;
1056  case AArch64::MOVZXi:
1057  case AArch64::MOVNXi:
1058  case AArch64::MOVKXi:
1059  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1060  break;
1061  }
1062 
1063  if (Inst.getOpcode() == AArch64::MOVKWi ||
1064  Inst.getOpcode() == AArch64::MOVKXi)
1065  Inst.addOperand(Inst.getOperand(0));
1066 
1067  Inst.addOperand(MCOperand::createImm(imm));
1068  Inst.addOperand(MCOperand::createImm(shift));
1069  return Success;
1070 }
1071 
1072 static DecodeStatus DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn,
1073  uint64_t Addr,
1074  const void *Decoder) {
1075  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1076  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1077  unsigned offset = fieldFromInstruction(insn, 10, 12);
1078  const AArch64Disassembler *Dis =
1079  static_cast<const AArch64Disassembler *>(Decoder);
1080 
1081  switch (Inst.getOpcode()) {
1082  default:
1083  return Fail;
1084  case AArch64::PRFMui:
1085  // Rt is an immediate in prefetch.
1086  Inst.addOperand(MCOperand::createImm(Rt));
1087  break;
1088  case AArch64::STRBBui:
1089  case AArch64::LDRBBui:
1090  case AArch64::LDRSBWui:
1091  case AArch64::STRHHui:
1092  case AArch64::LDRHHui:
1093  case AArch64::LDRSHWui:
1094  case AArch64::STRWui:
1095  case AArch64::LDRWui:
1096  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1097  break;
1098  case AArch64::LDRSBXui:
1099  case AArch64::LDRSHXui:
1100  case AArch64::LDRSWui:
1101  case AArch64::STRXui:
1102  case AArch64::LDRXui:
1103  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1104  break;
1105  case AArch64::LDRQui:
1106  case AArch64::STRQui:
1107  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1108  break;
1109  case AArch64::LDRDui:
1110  case AArch64::STRDui:
1111  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1112  break;
1113  case AArch64::LDRSui:
1114  case AArch64::STRSui:
1115  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1116  break;
1117  case AArch64::LDRHui:
1118  case AArch64::STRHui:
1119  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1120  break;
1121  case AArch64::LDRBui:
1122  case AArch64::STRBui:
1123  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1124  break;
1125  }
1126 
1127  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1128  if (!Dis->tryAddingSymbolicOperand(Inst, offset, Addr, Fail, 0, 4))
1129  Inst.addOperand(MCOperand::createImm(offset));
1130  return Success;
1131 }
1132 
1133 static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn,
1134  uint64_t Addr,
1135  const void *Decoder) {
1136  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1137  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1138  int64_t offset = fieldFromInstruction(insn, 12, 9);
1139 
1140  // offset is a 9-bit signed immediate, so sign extend it to
1141  // fill the unsigned.
1142  if (offset & (1 << (9 - 1)))
1143  offset |= ~((1LL << 9) - 1);
1144 
1145  // First operand is always the writeback to the address register, if needed.
1146  switch (Inst.getOpcode()) {
1147  default:
1148  break;
1149  case AArch64::LDRSBWpre:
1150  case AArch64::LDRSHWpre:
1151  case AArch64::STRBBpre:
1152  case AArch64::LDRBBpre:
1153  case AArch64::STRHHpre:
1154  case AArch64::LDRHHpre:
1155  case AArch64::STRWpre:
1156  case AArch64::LDRWpre:
1157  case AArch64::LDRSBWpost:
1158  case AArch64::LDRSHWpost:
1159  case AArch64::STRBBpost:
1160  case AArch64::LDRBBpost:
1161  case AArch64::STRHHpost:
1162  case AArch64::LDRHHpost:
1163  case AArch64::STRWpost:
1164  case AArch64::LDRWpost:
1165  case AArch64::LDRSBXpre:
1166  case AArch64::LDRSHXpre:
1167  case AArch64::STRXpre:
1168  case AArch64::LDRSWpre:
1169  case AArch64::LDRXpre:
1170  case AArch64::LDRSBXpost:
1171  case AArch64::LDRSHXpost:
1172  case AArch64::STRXpost:
1173  case AArch64::LDRSWpost:
1174  case AArch64::LDRXpost:
1175  case AArch64::LDRQpre:
1176  case AArch64::STRQpre:
1177  case AArch64::LDRQpost:
1178  case AArch64::STRQpost:
1179  case AArch64::LDRDpre:
1180  case AArch64::STRDpre:
1181  case AArch64::LDRDpost:
1182  case AArch64::STRDpost:
1183  case AArch64::LDRSpre:
1184  case AArch64::STRSpre:
1185  case AArch64::LDRSpost:
1186  case AArch64::STRSpost:
1187  case AArch64::LDRHpre:
1188  case AArch64::STRHpre:
1189  case AArch64::LDRHpost:
1190  case AArch64::STRHpost:
1191  case AArch64::LDRBpre:
1192  case AArch64::STRBpre:
1193  case AArch64::LDRBpost:
1194  case AArch64::STRBpost:
1195  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1196  break;
1197  }
1198 
1199  switch (Inst.getOpcode()) {
1200  default:
1201  return Fail;
1202  case AArch64::PRFUMi:
1203  // Rt is an immediate in prefetch.
1204  Inst.addOperand(MCOperand::createImm(Rt));
1205  break;
1206  case AArch64::STURBBi:
1207  case AArch64::LDURBBi:
1208  case AArch64::LDURSBWi:
1209  case AArch64::STURHHi:
1210  case AArch64::LDURHHi:
1211  case AArch64::LDURSHWi:
1212  case AArch64::STURWi:
1213  case AArch64::LDURWi:
1214  case AArch64::LDTRSBWi:
1215  case AArch64::LDTRSHWi:
1216  case AArch64::STTRWi:
1217  case AArch64::LDTRWi:
1218  case AArch64::STTRHi:
1219  case AArch64::LDTRHi:
1220  case AArch64::LDTRBi:
1221  case AArch64::STTRBi:
1222  case AArch64::LDRSBWpre:
1223  case AArch64::LDRSHWpre:
1224  case AArch64::STRBBpre:
1225  case AArch64::LDRBBpre:
1226  case AArch64::STRHHpre:
1227  case AArch64::LDRHHpre:
1228  case AArch64::STRWpre:
1229  case AArch64::LDRWpre:
1230  case AArch64::LDRSBWpost:
1231  case AArch64::LDRSHWpost:
1232  case AArch64::STRBBpost:
1233  case AArch64::LDRBBpost:
1234  case AArch64::STRHHpost:
1235  case AArch64::LDRHHpost:
1236  case AArch64::STRWpost:
1237  case AArch64::LDRWpost:
1238  case AArch64::STLURBi:
1239  case AArch64::STLURHi:
1240  case AArch64::STLURWi:
1241  case AArch64::LDAPURBi:
1242  case AArch64::LDAPURSBWi:
1243  case AArch64::LDAPURHi:
1244  case AArch64::LDAPURSHWi:
1245  case AArch64::LDAPURi:
1246  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1247  break;
1248  case AArch64::LDURSBXi:
1249  case AArch64::LDURSHXi:
1250  case AArch64::LDURSWi:
1251  case AArch64::STURXi:
1252  case AArch64::LDURXi:
1253  case AArch64::LDTRSBXi:
1254  case AArch64::LDTRSHXi:
1255  case AArch64::LDTRSWi:
1256  case AArch64::STTRXi:
1257  case AArch64::LDTRXi:
1258  case AArch64::LDRSBXpre:
1259  case AArch64::LDRSHXpre:
1260  case AArch64::STRXpre:
1261  case AArch64::LDRSWpre:
1262  case AArch64::LDRXpre:
1263  case AArch64::LDRSBXpost:
1264  case AArch64::LDRSHXpost:
1265  case AArch64::STRXpost:
1266  case AArch64::LDRSWpost:
1267  case AArch64::LDRXpost:
1268  case AArch64::LDAPURSWi:
1269  case AArch64::LDAPURSHXi:
1270  case AArch64::LDAPURSBXi:
1271  case AArch64::STLURXi:
1272  case AArch64::LDAPURXi:
1273  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1274  break;
1275  case AArch64::LDURQi:
1276  case AArch64::STURQi:
1277  case AArch64::LDRQpre:
1278  case AArch64::STRQpre:
1279  case AArch64::LDRQpost:
1280  case AArch64::STRQpost:
1281  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1282  break;
1283  case AArch64::LDURDi:
1284  case AArch64::STURDi:
1285  case AArch64::LDRDpre:
1286  case AArch64::STRDpre:
1287  case AArch64::LDRDpost:
1288  case AArch64::STRDpost:
1289  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1290  break;
1291  case AArch64::LDURSi:
1292  case AArch64::STURSi:
1293  case AArch64::LDRSpre:
1294  case AArch64::STRSpre:
1295  case AArch64::LDRSpost:
1296  case AArch64::STRSpost:
1297  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1298  break;
1299  case AArch64::LDURHi:
1300  case AArch64::STURHi:
1301  case AArch64::LDRHpre:
1302  case AArch64::STRHpre:
1303  case AArch64::LDRHpost:
1304  case AArch64::STRHpost:
1305  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1306  break;
1307  case AArch64::LDURBi:
1308  case AArch64::STURBi:
1309  case AArch64::LDRBpre:
1310  case AArch64::STRBpre:
1311  case AArch64::LDRBpost:
1312  case AArch64::STRBpost:
1313  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1314  break;
1315  }
1316 
1317  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1318  Inst.addOperand(MCOperand::createImm(offset));
1319 
1320  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1321  bool IsIndexed = fieldFromInstruction(insn, 10, 2) != 0;
1322  bool IsFP = fieldFromInstruction(insn, 26, 1);
1323 
1324  // Cannot write back to a transfer register (but xzr != sp).
1325  if (IsLoad && IsIndexed && !IsFP && Rn != 31 && Rt == Rn)
1326  return SoftFail;
1327 
1328  return Success;
1329 }
1330 
1331 static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn,
1332  uint64_t Addr,
1333  const void *Decoder) {
1334  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1335  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1336  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1337  unsigned Rs = fieldFromInstruction(insn, 16, 5);
1338 
1339  unsigned Opcode = Inst.getOpcode();
1340  switch (Opcode) {
1341  default:
1342  return Fail;
1343  case AArch64::STLXRW:
1344  case AArch64::STLXRB:
1345  case AArch64::STLXRH:
1346  case AArch64::STXRW:
1347  case AArch64::STXRB:
1348  case AArch64::STXRH:
1349  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1350  LLVM_FALLTHROUGH;
1351  case AArch64::LDARW:
1352  case AArch64::LDARB:
1353  case AArch64::LDARH:
1354  case AArch64::LDAXRW:
1355  case AArch64::LDAXRB:
1356  case AArch64::LDAXRH:
1357  case AArch64::LDXRW:
1358  case AArch64::LDXRB:
1359  case AArch64::LDXRH:
1360  case AArch64::STLRW:
1361  case AArch64::STLRB:
1362  case AArch64::STLRH:
1363  case AArch64::STLLRW:
1364  case AArch64::STLLRB:
1365  case AArch64::STLLRH:
1366  case AArch64::LDLARW:
1367  case AArch64::LDLARB:
1368  case AArch64::LDLARH:
1369  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1370  break;
1371  case AArch64::STLXRX:
1372  case AArch64::STXRX:
1373  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1374  LLVM_FALLTHROUGH;
1375  case AArch64::LDARX:
1376  case AArch64::LDAXRX:
1377  case AArch64::LDXRX:
1378  case AArch64::STLRX:
1379  case AArch64::LDLARX:
1380  case AArch64::STLLRX:
1381  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1382  break;
1383  case AArch64::STLXPW:
1384  case AArch64::STXPW:
1385  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1386  LLVM_FALLTHROUGH;
1387  case AArch64::LDAXPW:
1388  case AArch64::LDXPW:
1389  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1390  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1391  break;
1392  case AArch64::STLXPX:
1393  case AArch64::STXPX:
1394  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1395  LLVM_FALLTHROUGH;
1396  case AArch64::LDAXPX:
1397  case AArch64::LDXPX:
1398  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1399  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1400  break;
1401  }
1402 
1403  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1404 
1405  // You shouldn't load to the same register twice in an instruction...
1406  if ((Opcode == AArch64::LDAXPW || Opcode == AArch64::LDXPW ||
1407  Opcode == AArch64::LDAXPX || Opcode == AArch64::LDXPX) &&
1408  Rt == Rt2)
1409  return SoftFail;
1410 
1411  return Success;
1412 }
1413 
1414 static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn,
1415  uint64_t Addr,
1416  const void *Decoder) {
1417  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1418  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1419  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1420  int64_t offset = fieldFromInstruction(insn, 15, 7);
1421  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1422 
1423  // offset is a 7-bit signed immediate, so sign extend it to
1424  // fill the unsigned.
1425  if (offset & (1 << (7 - 1)))
1426  offset |= ~((1LL << 7) - 1);
1427 
1428  unsigned Opcode = Inst.getOpcode();
1429  bool NeedsDisjointWritebackTransfer = false;
1430 
1431  // First operand is always writeback of base register.
1432  switch (Opcode) {
1433  default:
1434  break;
1435  case AArch64::LDPXpost:
1436  case AArch64::STPXpost:
1437  case AArch64::LDPSWpost:
1438  case AArch64::LDPXpre:
1439  case AArch64::STPXpre:
1440  case AArch64::LDPSWpre:
1441  case AArch64::LDPWpost:
1442  case AArch64::STPWpost:
1443  case AArch64::LDPWpre:
1444  case AArch64::STPWpre:
1445  case AArch64::LDPQpost:
1446  case AArch64::STPQpost:
1447  case AArch64::LDPQpre:
1448  case AArch64::STPQpre:
1449  case AArch64::LDPDpost:
1450  case AArch64::STPDpost:
1451  case AArch64::LDPDpre:
1452  case AArch64::STPDpre:
1453  case AArch64::LDPSpost:
1454  case AArch64::STPSpost:
1455  case AArch64::LDPSpre:
1456  case AArch64::STPSpre:
1457  case AArch64::STGPpre:
1458  case AArch64::STGPpost:
1459  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1460  break;
1461  }
1462 
1463  switch (Opcode) {
1464  default:
1465  return Fail;
1466  case AArch64::LDPXpost:
1467  case AArch64::STPXpost:
1468  case AArch64::LDPSWpost:
1469  case AArch64::LDPXpre:
1470  case AArch64::STPXpre:
1471  case AArch64::LDPSWpre:
1472  case AArch64::STGPpre:
1473  case AArch64::STGPpost:
1474  NeedsDisjointWritebackTransfer = true;
1475  LLVM_FALLTHROUGH;
1476  case AArch64::LDNPXi:
1477  case AArch64::STNPXi:
1478  case AArch64::LDPXi:
1479  case AArch64::STPXi:
1480  case AArch64::LDPSWi:
1481  case AArch64::STGPi:
1482  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1483  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1484  break;
1485  case AArch64::LDPWpost:
1486  case AArch64::STPWpost:
1487  case AArch64::LDPWpre:
1488  case AArch64::STPWpre:
1489  NeedsDisjointWritebackTransfer = true;
1490  LLVM_FALLTHROUGH;
1491  case AArch64::LDNPWi:
1492  case AArch64::STNPWi:
1493  case AArch64::LDPWi:
1494  case AArch64::STPWi:
1495  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1496  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1497  break;
1498  case AArch64::LDNPQi:
1499  case AArch64::STNPQi:
1500  case AArch64::LDPQpost:
1501  case AArch64::STPQpost:
1502  case AArch64::LDPQi:
1503  case AArch64::STPQi:
1504  case AArch64::LDPQpre:
1505  case AArch64::STPQpre:
1506  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1507  DecodeFPR128RegisterClass(Inst, Rt2, Addr, Decoder);
1508  break;
1509  case AArch64::LDNPDi:
1510  case AArch64::STNPDi:
1511  case AArch64::LDPDpost:
1512  case AArch64::STPDpost:
1513  case AArch64::LDPDi:
1514  case AArch64::STPDi:
1515  case AArch64::LDPDpre:
1516  case AArch64::STPDpre:
1517  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1518  DecodeFPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1519  break;
1520  case AArch64::LDNPSi:
1521  case AArch64::STNPSi:
1522  case AArch64::LDPSpost:
1523  case AArch64::STPSpost:
1524  case AArch64::LDPSi:
1525  case AArch64::STPSi:
1526  case AArch64::LDPSpre:
1527  case AArch64::STPSpre:
1528  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1529  DecodeFPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1530  break;
1531  }
1532 
1533  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1534  Inst.addOperand(MCOperand::createImm(offset));
1535 
1536  // You shouldn't load to the same register twice in an instruction...
1537  if (IsLoad && Rt == Rt2)
1538  return SoftFail;
1539 
1540  // ... or do any operation that writes-back to a transfer register. But note
1541  // that "stp xzr, xzr, [sp], #4" is fine because xzr and sp are different.
1542  if (NeedsDisjointWritebackTransfer && Rn != 31 && (Rt == Rn || Rt2 == Rn))
1543  return SoftFail;
1544 
1545  return Success;
1546 }
1547 
1548 static DecodeStatus DecodeAuthLoadInstruction(MCInst &Inst, uint32_t insn,
1549  uint64_t Addr,
1550  const void *Decoder) {
1551  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1552  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1553  uint64_t offset = fieldFromInstruction(insn, 22, 1) << 9 |
1554  fieldFromInstruction(insn, 12, 9);
1555  unsigned writeback = fieldFromInstruction(insn, 11, 1);
1556 
1557  switch (Inst.getOpcode()) {
1558  default:
1559  return Fail;
1560  case AArch64::LDRAAwriteback:
1561  case AArch64::LDRABwriteback:
1562  DecodeGPR64spRegisterClass(Inst, Rn /* writeback register */, Addr,
1563  Decoder);
1564  break;
1565  case AArch64::LDRAAindexed:
1566  case AArch64::LDRABindexed:
1567  break;
1568  }
1569 
1570  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1571  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1572  DecodeSImm<10>(Inst, offset, Addr, Decoder);
1573 
1574  if (writeback && Rt == Rn && Rn != 31) {
1575  return SoftFail;
1576  }
1577 
1578  return Success;
1579 }
1580 
1581 static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn,
1582  uint64_t Addr,
1583  const void *Decoder) {
1584  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1585  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1586  unsigned Rm = fieldFromInstruction(insn, 16, 5);
1587  unsigned extend = fieldFromInstruction(insn, 10, 6);
1588 
1589  unsigned shift = extend & 0x7;
1590  if (shift > 4)
1591  return Fail;
1592 
1593  switch (Inst.getOpcode()) {
1594  default:
1595  return Fail;
1596  case AArch64::ADDWrx:
1597  case AArch64::SUBWrx:
1598  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1599  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1600  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1601  break;
1602  case AArch64::ADDSWrx:
1603  case AArch64::SUBSWrx:
1604  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1605  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1606  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1607  break;
1608  case AArch64::ADDXrx:
1609  case AArch64::SUBXrx:
1610  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1611  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1612  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1613  break;
1614  case AArch64::ADDSXrx:
1615  case AArch64::SUBSXrx:
1616  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1617  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1618  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1619  break;
1620  case AArch64::ADDXrx64:
1621  case AArch64::SUBXrx64:
1622  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1623  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1624  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1625  break;
1626  case AArch64::SUBSXrx64:
1627  case AArch64::ADDSXrx64:
1628  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1629  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1630  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1631  break;
1632  }
1633 
1634  Inst.addOperand(MCOperand::createImm(extend));
1635  return Success;
1636 }
1637 
1638 static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn,
1639  uint64_t Addr,
1640  const void *Decoder) {
1641  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1642  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1643  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1644  unsigned imm;
1645 
1646  if (Datasize) {
1647  if (Inst.getOpcode() == AArch64::ANDSXri)
1648  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1649  else
1650  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1651  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
1652  imm = fieldFromInstruction(insn, 10, 13);
1653  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1654  return Fail;
1655  } else {
1656  if (Inst.getOpcode() == AArch64::ANDSWri)
1657  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1658  else
1659  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1660  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
1661  imm = fieldFromInstruction(insn, 10, 12);
1662  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 32))
1663  return Fail;
1664  }
1665  Inst.addOperand(MCOperand::createImm(imm));
1666  return Success;
1667 }
1668 
1669 static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn,
1670  uint64_t Addr,
1671  const void *Decoder) {
1672  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1673  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1674  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1675  imm |= fieldFromInstruction(insn, 5, 5);
1676 
1677  if (Inst.getOpcode() == AArch64::MOVID)
1678  DecodeFPR64RegisterClass(Inst, Rd, Addr, Decoder);
1679  else
1680  DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder);
1681 
1682  Inst.addOperand(MCOperand::createImm(imm));
1683 
1684  switch (Inst.getOpcode()) {
1685  default:
1686  break;
1687  case AArch64::MOVIv4i16:
1688  case AArch64::MOVIv8i16:
1689  case AArch64::MVNIv4i16:
1690  case AArch64::MVNIv8i16:
1691  case AArch64::MOVIv2i32:
1692  case AArch64::MOVIv4i32:
1693  case AArch64::MVNIv2i32:
1694  case AArch64::MVNIv4i32:
1695  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1696  break;
1697  case AArch64::MOVIv2s_msl:
1698  case AArch64::MOVIv4s_msl:
1699  case AArch64::MVNIv2s_msl:
1700  case AArch64::MVNIv4s_msl:
1701  Inst.addOperand(MCOperand::createImm((cmode & 1) ? 0x110 : 0x108));
1702  break;
1703  }
1704 
1705  return Success;
1706 }
1707 
1708 static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn,
1709  uint64_t Addr,
1710  const void *Decoder) {
1711  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1712  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1713  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1714  imm |= fieldFromInstruction(insn, 5, 5);
1715 
1716  // Tied operands added twice.
1717  DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder);
1718  DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder);
1719 
1720  Inst.addOperand(MCOperand::createImm(imm));
1721  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1722 
1723  return Success;
1724 }
1725 
1726 static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn,
1727  uint64_t Addr, const void *Decoder) {
1728  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1729  int64_t imm = fieldFromInstruction(insn, 5, 19) << 2;
1730  imm |= fieldFromInstruction(insn, 29, 2);
1731  const AArch64Disassembler *Dis =
1732  static_cast<const AArch64Disassembler *>(Decoder);
1733 
1734  // Sign-extend the 21-bit immediate.
1735  if (imm & (1 << (21 - 1)))
1736  imm |= ~((1LL << 21) - 1);
1737 
1738  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1739  if (!Dis->tryAddingSymbolicOperand(Inst, imm, Addr, Fail, 0, 4))
1740  Inst.addOperand(MCOperand::createImm(imm));
1741 
1742  return Success;
1743 }
1744 
1745 static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn,
1746  uint64_t Addr, const void *Decoder) {
1747  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1748  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1749  unsigned Imm = fieldFromInstruction(insn, 10, 14);
1750  unsigned S = fieldFromInstruction(insn, 29, 1);
1751  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1752 
1753  unsigned ShifterVal = (Imm >> 12) & 3;
1754  unsigned ImmVal = Imm & 0xFFF;
1755  const AArch64Disassembler *Dis =
1756  static_cast<const AArch64Disassembler *>(Decoder);
1757 
1758  if (ShifterVal != 0 && ShifterVal != 1)
1759  return Fail;
1760 
1761  if (Datasize) {
1762  if (Rd == 31 && !S)
1763  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1764  else
1765  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1766  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1767  } else {
1768  if (Rd == 31 && !S)
1769  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1770  else
1771  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1772  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1773  }
1774 
1775  if (!Dis->tryAddingSymbolicOperand(Inst, Imm, Addr, Fail, 0, 4))
1776  Inst.addOperand(MCOperand::createImm(ImmVal));
1777  Inst.addOperand(MCOperand::createImm(12 * ShifterVal));
1778  return Success;
1779 }
1780 
1781 static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn,
1782  uint64_t Addr,
1783  const void *Decoder) {
1784  int64_t imm = fieldFromInstruction(insn, 0, 26);
1785  const AArch64Disassembler *Dis =
1786  static_cast<const AArch64Disassembler *>(Decoder);
1787 
1788  // Sign-extend the 26-bit immediate.
1789  if (imm & (1 << (26 - 1)))
1790  imm |= ~((1LL << 26) - 1);
1791 
1792  if (!Dis->tryAddingSymbolicOperand(Inst, imm * 4, Addr, true, 0, 4))
1793  Inst.addOperand(MCOperand::createImm(imm));
1794 
1795  return Success;
1796 }
1797 
1798 static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn,
1799  uint64_t Addr,
1800  const void *Decoder) {
1801  uint64_t op1 = fieldFromInstruction(insn, 16, 3);
1802  uint64_t op2 = fieldFromInstruction(insn, 5, 3);
1803  uint64_t crm = fieldFromInstruction(insn, 8, 4);
1804  uint64_t pstate_field = (op1 << 3) | op2;
1805 
1806  switch (pstate_field) {
1807  case 0x01: // XAFlag
1808  case 0x02: // AXFlag
1809  return Fail;
1810  }
1811 
1812  if ((pstate_field == AArch64PState::PAN ||
1813  pstate_field == AArch64PState::UAO ||
1814  pstate_field == AArch64PState::SSBS) && crm > 1)
1815  return Fail;
1816 
1817  Inst.addOperand(MCOperand::createImm(pstate_field));
1818  Inst.addOperand(MCOperand::createImm(crm));
1819 
1820  const AArch64Disassembler *Dis =
1821  static_cast<const AArch64Disassembler *>(Decoder);
1822  auto PState = AArch64PState::lookupPStateByEncoding(pstate_field);
1823  if (PState && PState->haveFeatures(Dis->getSubtargetInfo().getFeatureBits()))
1824  return Success;
1825  return Fail;
1826 }
1827 
1828 static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn,
1829  uint64_t Addr, const void *Decoder) {
1830  uint64_t Rt = fieldFromInstruction(insn, 0, 5);
1831  uint64_t bit = fieldFromInstruction(insn, 31, 1) << 5;
1832  bit |= fieldFromInstruction(insn, 19, 5);
1833  int64_t dst = fieldFromInstruction(insn, 5, 14);
1834  const AArch64Disassembler *Dis =
1835  static_cast<const AArch64Disassembler *>(Decoder);
1836 
1837  // Sign-extend 14-bit immediate.
1838  if (dst & (1 << (14 - 1)))
1839  dst |= ~((1LL << 14) - 1);
1840 
1841  if (fieldFromInstruction(insn, 31, 1) == 0)
1842  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1843  else
1844  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1845  Inst.addOperand(MCOperand::createImm(bit));
1846  if (!Dis->tryAddingSymbolicOperand(Inst, dst * 4, Addr, true, 0, 4))
1847  Inst.addOperand(MCOperand::createImm(dst));
1848 
1849  return Success;
1850 }
1851 
1852 static DecodeStatus DecodeGPRSeqPairsClassRegisterClass(MCInst &Inst,
1853  unsigned RegClassID,
1854  unsigned RegNo,
1855  uint64_t Addr,
1856  const void *Decoder) {
1857  // Register number must be even (see CASP instruction)
1858  if (RegNo & 0x1)
1859  return Fail;
1860 
1861  unsigned Reg = AArch64MCRegisterClasses[RegClassID].getRegister(RegNo / 2);
1862  Inst.addOperand(MCOperand::createReg(Reg));
1863  return Success;
1864 }
1865 
1866 static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst,
1867  unsigned RegNo,
1868  uint64_t Addr,
1869  const void *Decoder) {
1870  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1871  AArch64::WSeqPairsClassRegClassID,
1872  RegNo, Addr, Decoder);
1873 }
1874 
1875 static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst,
1876  unsigned RegNo,
1877  uint64_t Addr,
1878  const void *Decoder) {
1879  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1880  AArch64::XSeqPairsClassRegClassID,
1881  RegNo, Addr, Decoder);
1882 }
1883 
1884 static DecodeStatus DecodeSVELogicalImmInstruction(llvm::MCInst &Inst,
1885  uint32_t insn,
1886  uint64_t Addr,
1887  const void *Decoder) {
1888  unsigned Zdn = fieldFromInstruction(insn, 0, 5);
1889  unsigned imm = fieldFromInstruction(insn, 5, 13);
1890  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1891  return Fail;
1892 
1893  // The same (tied) operand is added twice to the instruction.
1894  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1895  if (Inst.getOpcode() != AArch64::DUPM_ZI)
1896  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1897  Inst.addOperand(MCOperand::createImm(imm));
1898  return Success;
1899 }
1900 
1901 template<int Bits>
1902 static DecodeStatus DecodeSImm(llvm::MCInst &Inst, uint64_t Imm,
1903  uint64_t Address, const void *Decoder) {
1904  if (Imm & ~((1LL << Bits) - 1))
1905  return Fail;
1906 
1907  // Imm is a signed immediate, so sign extend it.
1908  if (Imm & (1 << (Bits - 1)))
1909  Imm |= ~((1LL << Bits) - 1);
1910 
1911  Inst.addOperand(MCOperand::createImm(Imm));
1912  return Success;
1913 }
1914 
1915 // Decode 8-bit signed/unsigned immediate for a given element width.
1916 template <int ElementWidth>
1917 static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm,
1918  uint64_t Addr, const void *Decoder) {
1919  unsigned Val = (uint8_t)Imm;
1920  unsigned Shift = (Imm & 0x100) ? 8 : 0;
1921  if (ElementWidth == 8 && Shift)
1922  return Fail;
1923  Inst.addOperand(MCOperand::createImm(Val));
1924  Inst.addOperand(MCOperand::createImm(Shift));
1925  return Success;
1926 }
1927 
1928 // Decode uimm4 ranged from 1-16.
1929 static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm,
1930  uint64_t Addr, const void *Decoder) {
1931  Inst.addOperand(MCOperand::createImm(Imm + 1));
1932  return Success;
1933 }
llvm::Check::Size
@ Size
Definition: FileCheck.h:73
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static const unsigned GPR64DecoderTable[]
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Definition: AArch64Disassembler.cpp:843
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Definition: AArch64Disassembler.cpp:1548
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Definition: AArch64Disassembler.cpp:252
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Definition: IRTranslator.cpp:100
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Definition: AllocatorList.h:23
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static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:340
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static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:611
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Definition: AArch64Disassembler.cpp:1133
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Definition: AArch64Disassembler.cpp:1072
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Definition: AArch64Disassembler.cpp:568
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static MCOperand createImm(int64_t Val)
Definition: MCInst.h:140
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Context object for machine code objects.
Definition: MCContext.h:71
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Definition: TargetRegistry.h:124
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Definition: AArch64Disassembler.cpp:727
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static DecodeStatus DecodeGPR64x8ClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
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LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64Disassembler()
Definition: AArch64Disassembler.cpp:295
ErrorHandling.h
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static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
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Definition: AArch64TargetInfo.cpp:21
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#define Fail
Definition: AArch64Disassembler.cpp:249
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Definition: Triple.h:45
DecodeFMOVLaneInstruction
static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:884
Disassembler.h
FPR32DecoderTable
static const unsigned FPR32DecoderTable[]
Definition: AArch64Disassembler.cpp:369
DecodeVecShiftR64Imm
static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:919
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:866
FPR16DecoderTable
static const unsigned FPR16DecoderTable[]
Definition: AArch64Disassembler.cpp:390
DecodeGPR32RegisterClass
static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:515
createAArch64ExternalSymbolizer
static MCSymbolizer * createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo, LLVMSymbolLookupCallback SymbolLookUp, void *DisInfo, MCContext *Ctx, std::unique_ptr< MCRelocationInfo > &&RelInfo)
Definition: AArch64Disassembler.cpp:287
DecodeVecShiftL64Imm
static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:957
DecodeFPR64RegisterClass
static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:358
DecodeDDRegisterClass
static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:771
llvm::TargetRegistry::RegisterMCDisassembler
static void RegisterMCDisassembler(Target &T, Target::MCDisassemblerCtorTy Fn)
RegisterMCDisassembler - Register a MCDisassembler implementation for the given target.
Definition: TargetRegistry.h:824
DecodeMoveImmInstruction
static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1039
AArch64Disassembler.h
DecodeVecShiftL16Imm
static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:967
DecodeGPR64commonRegisterClass
static DecodeStatus DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:442
llvm::MCInst
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:183
DecodeVecShiftR64ImmNarrow
static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:924
DecodeGPR64spRegisterClass
static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:493
DecodeGPR32spRegisterClass
static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:526
GPR64x8DecoderTable
static const unsigned GPR64x8DecoderTable[]
Definition: AArch64Disassembler.cpp:464
DecodeVecShiftLImm
static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm, unsigned Add)
Definition: AArch64Disassembler.cpp:913
llvm::MCSymbolizer
Symbolize and annotate disassembled instructions.
Definition: MCSymbolizer.h:38
DecodeUnconditionalBranch
static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1781
DecodeFPR16RegisterClass
static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:400
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
ZZZDecoderTable
static const unsigned ZZZDecoderTable[]
Definition: AArch64Disassembler.cpp:597
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
P2
This might compile to this xmm1 xorps xmm0 movss xmm0 ret Now consider if the code caused xmm1 to get spilled This might produce this xmm1 movaps xmm0 movaps xmm1 movss xmm0 ret since the reload is only used by these we could fold it into the producing something like xmm1 movaps xmm0 ret saving two instructions The basic idea is that a reload from a spill if only one byte chunk is bring in zeros the one element instead of elements This can be used to simplify a variety of shuffle where the elements are fixed zeros This code generates ugly probably due to costs being off or< 4 x float > * P2
Definition: README-SSE.txt:278
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:827
SoftFail
#define SoftFail
Definition: AArch64Disassembler.cpp:250
DecodeVecShiftL8Imm
static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:972
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:50
DecodeVecShiftR32ImmNarrow
static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:935
DecodeZPR_4bRegisterClass
static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:560
DecodeGPR64RegisterClass
static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:453
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:941
llvm::MCDisassembler::STI
const MCSubtargetInfo & STI
Definition: MCDisassembler.h:170
llvm::MCInst::addOperand
void addOperand(const MCOperand Op)
Definition: MCInst.h:209
AArch64AddressingModes.h
DecodeAdrInstruction
static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1726
DecodeVecShiftR8Imm
static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:952
Check
static bool Check(DecodeStatus &Out, DecodeStatus In)
Definition: AArch64Disassembler.cpp:230
DecodeExclusiveLdStInstruction
static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1331
llvm::tgtok::In
@ In
Definition: TGLexer.h:51
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:750
DecodeSImm
static DecodeStatus DecodeSImm(llvm::MCInst &Inst, uint64_t Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1902
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:704
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:907
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
DDDDDecoderTable
static const unsigned DDDDDecoderTable[]
Definition: AArch64Disassembler.cpp:803
DecodeFixedPointScaleImm64
static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:836
VectorDecoderTable
static const unsigned VectorDecoderTable[]
Definition: AArch64Disassembler.cpp:672
DecodeZPR2RegisterClass
static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:587
MCRegisterInfo.h
DecodeAddSubERegInstruction
static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1581
llvm::HighlightColor::Address
@ Address
DecodeDDDRegisterClass
static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:794
llvm::AArch64ExternalSymbolizer
Definition: AArch64ExternalSymbolizer.h:20
DecodeVecShiftL32Imm
static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:962
DecodeModImmTiedInstruction
static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1708
GPR32DecoderTable
static const unsigned GPR32DecoderTable[]
Definition: AArch64Disassembler.cpp:505
ZZDecoderTable
static const unsigned ZZDecoderTable[]
Definition: AArch64Disassembler.cpp:576
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
FPR64DecoderTable
static const unsigned FPR64DecoderTable[]
Definition: AArch64Disassembler.cpp:348
llvm::ArrayRef< uint8_t >
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:136
llvm::MCOperand::createReg
static MCOperand createReg(unsigned Reg)
Definition: MCInst.h:133
DecodePPRRegisterClass
static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:652
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:281
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:379
llvm::Register
Wrapper class representing virtual and physical registers.
Definition: Register.h:19
FPR8DecoderTable
static const unsigned FPR8DecoderTable[]
Definition: AArch64Disassembler.cpp:411
ZPRDecoderTable
static const unsigned ZPRDecoderTable[]
Definition: AArch64Disassembler.cpp:538
DecodeThreeAddrSRegInstruction
static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:977
DecodeVectorRegisterClass
static DecodeStatus DecodeVectorRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:682
DecodeDDDDRegisterClass
static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:817
DecodeModImmInstruction
static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1669
DecodeSystemPStateInstruction
static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1798
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
FPR128DecoderTable
static const unsigned FPR128DecoderTable[]
Definition: AArch64Disassembler.cpp:319
Success
#define Success
Definition: AArch64Disassembler.cpp:248
DecodeImm8OptLsl
static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1917
DDDDecoderTable
static const unsigned DDDDecoderTable[]
Definition: AArch64Disassembler.cpp:780
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:258
MCRelocationInfo.h
QQQQDecoderTable
static const unsigned QQQQDecoderTable[]
Definition: AArch64Disassembler.cpp:736
DDDecoderTable
static const unsigned DDDecoderTable[]
Definition: AArch64Disassembler.cpp:760
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:1852
llvm::MCInst::getOpcode
unsigned getOpcode() const
Definition: MCInst.h:197
DecodeTestAndBranch
static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1828
AArch64MCTargetDesc.h
DecodePPR_3bRegisterClass
static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:662
QQQDecoderTable
static const unsigned QQQDecoderTable[]
Definition: AArch64Disassembler.cpp:713
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:930
DecodeXSeqPairsClassRegisterClass
static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1875
DecodeFPR128RegisterClass
static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:329
DecodeVecShiftR16ImmNarrow
static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:946
DecodeZPR4RegisterClass
static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:635
DecodeMemExtend
static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:859
llvm::getTheARM64Target
Target & getTheARM64Target()
Definition: AArch64TargetInfo.cpp:25
llvm::MCInst::getOperand
const MCOperand & getOperand(unsigned i) const
Definition: MCInst.h:205
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:321
llvm::ArrayRef::size
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:163
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:549
llvm::AArch64Disassembler
Definition: AArch64Disassembler.h:19
DecodeFPR8RegisterClass
static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:421
DecodeMSRSystemRegister
static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:876
llvm::TargetRegistry::RegisterMCSymbolizer
static void RegisterMCSymbolizer(Target &T, Target::MCSymbolizerCtorTy Fn)
RegisterMCSymbolizer - Register an MCSymbolizer implementation for the given target.
Definition: TargetRegistry.h:910
DecodeSVELogicalImmInstruction
static DecodeStatus DecodeSVELogicalImmInstruction(llvm::MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1884
DecodeLogicalImmInstruction
static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1638
DecodePairLdStInstruction
static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1414
PPRDecoderTable
static const unsigned PPRDecoderTable[]
Definition: AArch64Disassembler.cpp:645
ZZZZDecoderTable
static const unsigned ZZZZDecoderTable[]
Definition: AArch64Disassembler.cpp:621
TargetRegistry.h
llvm::MCSubtargetInfo
Generic base class for all target subtargets.
Definition: MCSubtargetInfo.h:75
Debug.h
DecodeWSeqPairsClassRegisterClass
static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1866
AArch64TargetInfo.h
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