LLVM  8.0.1
AArch64Disassembler.cpp
Go to the documentation of this file.
1 //===- AArch64Disassembler.cpp - Disassembler for AArch64 -----------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "AArch64Disassembler.h"
14 #include "AArch64ExternalSymbolizer.h"
15 #include "MCTargetDesc/AArch64AddressingModes.h"
16 #include "MCTargetDesc/AArch64MCTargetDesc.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 DecodeGPR64spRegisterClass(MCInst &Inst,
66  unsigned RegNo, uint64_t Address,
67  const void *Decoder);
68 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo,
69  uint64_t Address,
70  const void *Decoder);
71 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst,
72  unsigned RegNo, uint64_t Address,
73  const void *Decoder);
74 static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo,
75  uint64_t Address,
76  const void *Decoder);
77 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo,
78  uint64_t Address,
79  const void *Decoder);
80 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo,
81  uint64_t Address,
82  const void *Decoder);
83 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo,
84  uint64_t Address,
85  const void *Decoder);
86 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo,
87  uint64_t Address,
88  const void *Decoder);
89 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo,
90  uint64_t Address,
91  const void *Decoder);
92 static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo,
93  uint64_t Address,
94  const void *Decoder);
95 static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo,
96  uint64_t Address,
97  const void *Decoder);
98 static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
99  uint64_t Address,
100  const void *Decoder);
101 static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo,
102  uint64_t Address,
103  const void *Decoder);
104 static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo,
105  uint64_t Address,
106  const void *Decoder);
107 static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo,
108  uint64_t Address,
109  const void *Decoder);
110 static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo,
111  uint64_t Address,
112  const void *Decoder);
113 static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
114  uint64_t Address,
115  const void *Decoder);
116 
117 static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm,
118  uint64_t Address,
119  const void *Decoder);
120 static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm,
121  uint64_t Address,
122  const void *Decoder);
123 static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm,
124  uint64_t Address, const void *Decoder);
125 static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm,
126  uint64_t Address, const void *Decoder);
127 static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm,
128  uint64_t Address, const void *Decoder);
129 static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm,
130  uint64_t Address, const void *Decoder);
131 static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn,
132  uint64_t Address,
133  const void *Decoder);
134 static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn,
135  uint64_t Address,
136  const void *Decoder);
137 static DecodeStatus DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn,
138  uint64_t Address,
139  const void *Decoder);
140 static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn,
141  uint64_t Address,
142  const void *Decoder);
143 static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn,
144  uint64_t Address,
145  const void *Decoder);
146 static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn,
147  uint64_t Address,
148  const void *Decoder);
149 static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn,
150  uint64_t Address,
151  const void *Decoder);
152 static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn,
153  uint64_t Address,
154  const void *Decoder);
155 static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn,
156  uint64_t Address,
157  const void *Decoder);
158 static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn,
159  uint64_t Address,
160  const void *Decoder);
161 static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn,
162  uint64_t Address, const void *Decoder);
163 static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn,
164  uint64_t Address, const void *Decoder);
165 static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn,
166  uint64_t Address,
167  const void *Decoder);
168 static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn,
169  uint64_t Address,
170  const void *Decoder);
171 static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn,
172  uint64_t Address, const void *Decoder);
173 
174 static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn,
175  uint64_t Address,
176  const void *Decoder);
177 static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm,
178  uint64_t Addr, const void *Decoder);
179 static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm,
180  uint64_t Addr,
181  const void *Decoder);
182 static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm,
183  uint64_t Addr, const void *Decoder);
184 static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm,
185  uint64_t Addr,
186  const void *Decoder);
187 static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm,
188  uint64_t Addr, const void *Decoder);
189 static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm,
190  uint64_t Addr,
191  const void *Decoder);
192 static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm,
193  uint64_t Addr, const void *Decoder);
194 static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm,
195  uint64_t Addr, const void *Decoder);
196 static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm,
197  uint64_t Addr, const void *Decoder);
198 static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm,
199  uint64_t Addr, const void *Decoder);
200 static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm,
201  uint64_t Addr, const void *Decoder);
202 static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst,
203  unsigned RegNo,
204  uint64_t Addr,
205  const void *Decoder);
206 static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst,
207  unsigned RegNo,
208  uint64_t Addr,
209  const void *Decoder);
210 static DecodeStatus DecodeSVELogicalImmInstruction(llvm::MCInst &Inst,
211  uint32_t insn,
212  uint64_t Address,
213  const void *Decoder);
214 template<int Bits>
215 static DecodeStatus DecodeSImm(llvm::MCInst &Inst, uint64_t Imm,
216  uint64_t Address, const void *Decoder);
217 template <int ElementWidth>
218 static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm,
219  uint64_t Addr, const void *Decoder);
220 static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm,
221  uint64_t Addr, const void *Decoder);
222 
223 static DecodeStatus DecodeLoadAllocTagArrayInstruction(MCInst &Inst,
224  uint32_t insn,
225  uint64_t address,
226  const void* Decoder);
227 
228 static bool Check(DecodeStatus &Out, DecodeStatus In) {
229  switch (In) {
230  case MCDisassembler::Success:
231  // Out stays the same.
232  return true;
233  case MCDisassembler::SoftFail:
234  Out = In;
235  return true;
236  case MCDisassembler::Fail:
237  Out = In;
238  return false;
239  }
240  llvm_unreachable("Invalid DecodeStatus!");
241 }
242 
243 #include "AArch64GenDisassemblerTables.inc"
244 #include "AArch64GenInstrInfo.inc"
245 
246 #define Success MCDisassembler::Success
247 #define Fail MCDisassembler::Fail
248 #define SoftFail MCDisassembler::SoftFail
249 
250 static MCDisassembler *createAArch64Disassembler(const Target &T,
251  const MCSubtargetInfo &STI,
252  MCContext &Ctx) {
253  return new AArch64Disassembler(STI, Ctx);
254 }
255 
256 DecodeStatus AArch64Disassembler::getInstruction(MCInst &MI, uint64_t &Size,
257  ArrayRef<uint8_t> Bytes,
258  uint64_t Address,
259  raw_ostream &OS,
260  raw_ostream &CS) const {
261  CommentStream = &CS;
262 
263  Size = 0;
264  // We want to read exactly 4 bytes of data.
265  if (Bytes.size() < 4)
266  return Fail;
267  Size = 4;
268 
269  // Encoded as a small-endian 32-bit word in the stream.
270  uint32_t Insn =
271  (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
272 
273  // Calling the auto-generated decoder function.
274  return decodeInstruction(DecoderTable32, MI, Insn, Address, this, STI);
275 }
276 
277 static MCSymbolizer *
278 createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo,
279  LLVMSymbolLookupCallback SymbolLookUp,
280  void *DisInfo, MCContext *Ctx,
281  std::unique_ptr<MCRelocationInfo> &&RelInfo) {
282  return new AArch64ExternalSymbolizer(*Ctx, std::move(RelInfo), GetOpInfo,
283  SymbolLookUp, DisInfo);
284 }
285 
286 extern "C" void LLVMInitializeAArch64Disassembler() {
287  TargetRegistry::RegisterMCDisassembler(getTheAArch64leTarget(),
288  createAArch64Disassembler);
289  TargetRegistry::RegisterMCDisassembler(getTheAArch64beTarget(),
290  createAArch64Disassembler);
291  TargetRegistry::RegisterMCSymbolizer(getTheAArch64leTarget(),
292  createAArch64ExternalSymbolizer);
293  TargetRegistry::RegisterMCSymbolizer(getTheAArch64beTarget(),
294  createAArch64ExternalSymbolizer);
295 
296  TargetRegistry::RegisterMCDisassembler(getTheARM64Target(),
297  createAArch64Disassembler);
298  TargetRegistry::RegisterMCSymbolizer(getTheARM64Target(),
299  createAArch64ExternalSymbolizer);
300 }
301 
302 static const unsigned FPR128DecoderTable[] = {
303  AArch64::Q0, AArch64::Q1, AArch64::Q2, AArch64::Q3, AArch64::Q4,
304  AArch64::Q5, AArch64::Q6, AArch64::Q7, AArch64::Q8, AArch64::Q9,
305  AArch64::Q10, AArch64::Q11, AArch64::Q12, AArch64::Q13, AArch64::Q14,
306  AArch64::Q15, AArch64::Q16, AArch64::Q17, AArch64::Q18, AArch64::Q19,
307  AArch64::Q20, AArch64::Q21, AArch64::Q22, AArch64::Q23, AArch64::Q24,
308  AArch64::Q25, AArch64::Q26, AArch64::Q27, AArch64::Q28, AArch64::Q29,
309  AArch64::Q30, AArch64::Q31
310 };
311 
312 static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo,
313  uint64_t Addr,
314  const void *Decoder) {
315  if (RegNo > 31)
316  return Fail;
317 
318  unsigned Register = FPR128DecoderTable[RegNo];
319  Inst.addOperand(MCOperand::createReg(Register));
320  return Success;
321 }
322 
323 static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo,
324  uint64_t Addr,
325  const void *Decoder) {
326  if (RegNo > 15)
327  return Fail;
328  return DecodeFPR128RegisterClass(Inst, RegNo, Addr, Decoder);
329 }
330 
331 static const unsigned FPR64DecoderTable[] = {
332  AArch64::D0, AArch64::D1, AArch64::D2, AArch64::D3, AArch64::D4,
333  AArch64::D5, AArch64::D6, AArch64::D7, AArch64::D8, AArch64::D9,
334  AArch64::D10, AArch64::D11, AArch64::D12, AArch64::D13, AArch64::D14,
335  AArch64::D15, AArch64::D16, AArch64::D17, AArch64::D18, AArch64::D19,
336  AArch64::D20, AArch64::D21, AArch64::D22, AArch64::D23, AArch64::D24,
337  AArch64::D25, AArch64::D26, AArch64::D27, AArch64::D28, AArch64::D29,
338  AArch64::D30, AArch64::D31
339 };
340 
341 static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo,
342  uint64_t Addr,
343  const void *Decoder) {
344  if (RegNo > 31)
345  return Fail;
346 
347  unsigned Register = FPR64DecoderTable[RegNo];
348  Inst.addOperand(MCOperand::createReg(Register));
349  return Success;
350 }
351 
352 static const unsigned FPR32DecoderTable[] = {
353  AArch64::S0, AArch64::S1, AArch64::S2, AArch64::S3, AArch64::S4,
354  AArch64::S5, AArch64::S6, AArch64::S7, AArch64::S8, AArch64::S9,
355  AArch64::S10, AArch64::S11, AArch64::S12, AArch64::S13, AArch64::S14,
356  AArch64::S15, AArch64::S16, AArch64::S17, AArch64::S18, AArch64::S19,
357  AArch64::S20, AArch64::S21, AArch64::S22, AArch64::S23, AArch64::S24,
358  AArch64::S25, AArch64::S26, AArch64::S27, AArch64::S28, AArch64::S29,
359  AArch64::S30, AArch64::S31
360 };
361 
362 static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo,
363  uint64_t Addr,
364  const void *Decoder) {
365  if (RegNo > 31)
366  return Fail;
367 
368  unsigned Register = FPR32DecoderTable[RegNo];
369  Inst.addOperand(MCOperand::createReg(Register));
370  return Success;
371 }
372 
373 static const unsigned FPR16DecoderTable[] = {
374  AArch64::H0, AArch64::H1, AArch64::H2, AArch64::H3, AArch64::H4,
375  AArch64::H5, AArch64::H6, AArch64::H7, AArch64::H8, AArch64::H9,
376  AArch64::H10, AArch64::H11, AArch64::H12, AArch64::H13, AArch64::H14,
377  AArch64::H15, AArch64::H16, AArch64::H17, AArch64::H18, AArch64::H19,
378  AArch64::H20, AArch64::H21, AArch64::H22, AArch64::H23, AArch64::H24,
379  AArch64::H25, AArch64::H26, AArch64::H27, AArch64::H28, AArch64::H29,
380  AArch64::H30, AArch64::H31
381 };
382 
383 static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo,
384  uint64_t Addr,
385  const void *Decoder) {
386  if (RegNo > 31)
387  return Fail;
388 
389  unsigned Register = FPR16DecoderTable[RegNo];
390  Inst.addOperand(MCOperand::createReg(Register));
391  return Success;
392 }
393 
394 static const unsigned FPR8DecoderTable[] = {
395  AArch64::B0, AArch64::B1, AArch64::B2, AArch64::B3, AArch64::B4,
396  AArch64::B5, AArch64::B6, AArch64::B7, AArch64::B8, AArch64::B9,
397  AArch64::B10, AArch64::B11, AArch64::B12, AArch64::B13, AArch64::B14,
398  AArch64::B15, AArch64::B16, AArch64::B17, AArch64::B18, AArch64::B19,
399  AArch64::B20, AArch64::B21, AArch64::B22, AArch64::B23, AArch64::B24,
400  AArch64::B25, AArch64::B26, AArch64::B27, AArch64::B28, AArch64::B29,
401  AArch64::B30, AArch64::B31
402 };
403 
404 static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo,
405  uint64_t Addr,
406  const void *Decoder) {
407  if (RegNo > 31)
408  return Fail;
409 
410  unsigned Register = FPR8DecoderTable[RegNo];
411  Inst.addOperand(MCOperand::createReg(Register));
412  return Success;
413 }
414 
415 static const unsigned GPR64DecoderTable[] = {
416  AArch64::X0, AArch64::X1, AArch64::X2, AArch64::X3, AArch64::X4,
417  AArch64::X5, AArch64::X6, AArch64::X7, AArch64::X8, AArch64::X9,
418  AArch64::X10, AArch64::X11, AArch64::X12, AArch64::X13, AArch64::X14,
419  AArch64::X15, AArch64::X16, AArch64::X17, AArch64::X18, AArch64::X19,
420  AArch64::X20, AArch64::X21, AArch64::X22, AArch64::X23, AArch64::X24,
421  AArch64::X25, AArch64::X26, AArch64::X27, AArch64::X28, AArch64::FP,
422  AArch64::LR, AArch64::XZR
423 };
424 
425 static DecodeStatus DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo,
426  uint64_t Addr,
427  const void *Decoder) {
428  if (RegNo > 30)
429  return Fail;
430 
431  unsigned Register = GPR64DecoderTable[RegNo];
432  Inst.addOperand(MCOperand::createReg(Register));
433  return Success;
434 }
435 
436 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo,
437  uint64_t Addr,
438  const void *Decoder) {
439  if (RegNo > 31)
440  return Fail;
441 
442  unsigned Register = GPR64DecoderTable[RegNo];
443  Inst.addOperand(MCOperand::createReg(Register));
444  return Success;
445 }
446 
447 static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo,
448  uint64_t Addr,
449  const void *Decoder) {
450  if (RegNo > 31)
451  return Fail;
452  unsigned Register = GPR64DecoderTable[RegNo];
453  if (Register == AArch64::XZR)
454  Register = AArch64::SP;
455  Inst.addOperand(MCOperand::createReg(Register));
456  return Success;
457 }
458 
459 static const unsigned GPR32DecoderTable[] = {
460  AArch64::W0, AArch64::W1, AArch64::W2, AArch64::W3, AArch64::W4,
461  AArch64::W5, AArch64::W6, AArch64::W7, AArch64::W8, AArch64::W9,
462  AArch64::W10, AArch64::W11, AArch64::W12, AArch64::W13, AArch64::W14,
463  AArch64::W15, AArch64::W16, AArch64::W17, AArch64::W18, AArch64::W19,
464  AArch64::W20, AArch64::W21, AArch64::W22, AArch64::W23, AArch64::W24,
465  AArch64::W25, AArch64::W26, AArch64::W27, AArch64::W28, AArch64::W29,
466  AArch64::W30, AArch64::WZR
467 };
468 
469 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo,
470  uint64_t Addr,
471  const void *Decoder) {
472  if (RegNo > 31)
473  return Fail;
474 
475  unsigned Register = GPR32DecoderTable[RegNo];
476  Inst.addOperand(MCOperand::createReg(Register));
477  return Success;
478 }
479 
480 static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo,
481  uint64_t Addr,
482  const void *Decoder) {
483  if (RegNo > 31)
484  return Fail;
485 
486  unsigned Register = GPR32DecoderTable[RegNo];
487  if (Register == AArch64::WZR)
488  Register = AArch64::WSP;
489  Inst.addOperand(MCOperand::createReg(Register));
490  return Success;
491 }
492 static const unsigned ZPRDecoderTable[] = {
493  AArch64::Z0, AArch64::Z1, AArch64::Z2, AArch64::Z3,
494  AArch64::Z4, AArch64::Z5, AArch64::Z6, AArch64::Z7,
495  AArch64::Z8, AArch64::Z9, AArch64::Z10, AArch64::Z11,
496  AArch64::Z12, AArch64::Z13, AArch64::Z14, AArch64::Z15,
497  AArch64::Z16, AArch64::Z17, AArch64::Z18, AArch64::Z19,
498  AArch64::Z20, AArch64::Z21, AArch64::Z22, AArch64::Z23,
499  AArch64::Z24, AArch64::Z25, AArch64::Z26, AArch64::Z27,
500  AArch64::Z28, AArch64::Z29, AArch64::Z30, AArch64::Z31
501 };
502 
503 static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo,
504  uint64_t Address,
505  const void* Decoder) {
506  if (RegNo > 31)
507  return Fail;
508 
509  unsigned Register = ZPRDecoderTable[RegNo];
510  Inst.addOperand(MCOperand::createReg(Register));
511  return Success;
512 }
513 
514 static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo,
515  uint64_t Address,
516  const void *Decoder) {
517  if (RegNo > 15)
518  return Fail;
519  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
520 }
521 
522 static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
523  uint64_t Address,
524  const void *Decoder) {
525  if (RegNo > 7)
526  return Fail;
527  return DecodeZPRRegisterClass(Inst, RegNo, Address, Decoder);
528 }
529 
530 static const unsigned ZZDecoderTable[] = {
531  AArch64::Z0_Z1, AArch64::Z1_Z2, AArch64::Z2_Z3, AArch64::Z3_Z4,
532  AArch64::Z4_Z5, AArch64::Z5_Z6, AArch64::Z6_Z7, AArch64::Z7_Z8,
533  AArch64::Z8_Z9, AArch64::Z9_Z10, AArch64::Z10_Z11, AArch64::Z11_Z12,
534  AArch64::Z12_Z13, AArch64::Z13_Z14, AArch64::Z14_Z15, AArch64::Z15_Z16,
535  AArch64::Z16_Z17, AArch64::Z17_Z18, AArch64::Z18_Z19, AArch64::Z19_Z20,
536  AArch64::Z20_Z21, AArch64::Z21_Z22, AArch64::Z22_Z23, AArch64::Z23_Z24,
537  AArch64::Z24_Z25, AArch64::Z25_Z26, AArch64::Z26_Z27, AArch64::Z27_Z28,
538  AArch64::Z28_Z29, AArch64::Z29_Z30, AArch64::Z30_Z31, AArch64::Z31_Z0
539 };
540 
541 static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo,
542  uint64_t Address,
543  const void* Decoder) {
544  if (RegNo > 31)
545  return Fail;
546  unsigned Register = ZZDecoderTable[RegNo];
547  Inst.addOperand(MCOperand::createReg(Register));
548  return Success;
549 }
550 
551 static const unsigned ZZZDecoderTable[] = {
552  AArch64::Z0_Z1_Z2, AArch64::Z1_Z2_Z3, AArch64::Z2_Z3_Z4,
553  AArch64::Z3_Z4_Z5, AArch64::Z4_Z5_Z6, AArch64::Z5_Z6_Z7,
554  AArch64::Z6_Z7_Z8, AArch64::Z7_Z8_Z9, AArch64::Z8_Z9_Z10,
555  AArch64::Z9_Z10_Z11, AArch64::Z10_Z11_Z12, AArch64::Z11_Z12_Z13,
556  AArch64::Z12_Z13_Z14, AArch64::Z13_Z14_Z15, AArch64::Z14_Z15_Z16,
557  AArch64::Z15_Z16_Z17, AArch64::Z16_Z17_Z18, AArch64::Z17_Z18_Z19,
558  AArch64::Z18_Z19_Z20, AArch64::Z19_Z20_Z21, AArch64::Z20_Z21_Z22,
559  AArch64::Z21_Z22_Z23, AArch64::Z22_Z23_Z24, AArch64::Z23_Z24_Z25,
560  AArch64::Z24_Z25_Z26, AArch64::Z25_Z26_Z27, AArch64::Z26_Z27_Z28,
561  AArch64::Z27_Z28_Z29, AArch64::Z28_Z29_Z30, AArch64::Z29_Z30_Z31,
562  AArch64::Z30_Z31_Z0, AArch64::Z31_Z0_Z1
563 };
564 
565 static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo,
566  uint64_t Address,
567  const void* Decoder) {
568  if (RegNo > 31)
569  return Fail;
570  unsigned Register = ZZZDecoderTable[RegNo];
571  Inst.addOperand(MCOperand::createReg(Register));
572  return Success;
573 }
574 
575 static const unsigned ZZZZDecoderTable[] = {
576  AArch64::Z0_Z1_Z2_Z3, AArch64::Z1_Z2_Z3_Z4, AArch64::Z2_Z3_Z4_Z5,
577  AArch64::Z3_Z4_Z5_Z6, AArch64::Z4_Z5_Z6_Z7, AArch64::Z5_Z6_Z7_Z8,
578  AArch64::Z6_Z7_Z8_Z9, AArch64::Z7_Z8_Z9_Z10, AArch64::Z8_Z9_Z10_Z11,
579  AArch64::Z9_Z10_Z11_Z12, AArch64::Z10_Z11_Z12_Z13, AArch64::Z11_Z12_Z13_Z14,
580  AArch64::Z12_Z13_Z14_Z15, AArch64::Z13_Z14_Z15_Z16, AArch64::Z14_Z15_Z16_Z17,
581  AArch64::Z15_Z16_Z17_Z18, AArch64::Z16_Z17_Z18_Z19, AArch64::Z17_Z18_Z19_Z20,
582  AArch64::Z18_Z19_Z20_Z21, AArch64::Z19_Z20_Z21_Z22, AArch64::Z20_Z21_Z22_Z23,
583  AArch64::Z21_Z22_Z23_Z24, AArch64::Z22_Z23_Z24_Z25, AArch64::Z23_Z24_Z25_Z26,
584  AArch64::Z24_Z25_Z26_Z27, AArch64::Z25_Z26_Z27_Z28, AArch64::Z26_Z27_Z28_Z29,
585  AArch64::Z27_Z28_Z29_Z30, AArch64::Z28_Z29_Z30_Z31, AArch64::Z29_Z30_Z31_Z0,
586  AArch64::Z30_Z31_Z0_Z1, AArch64::Z31_Z0_Z1_Z2
587 };
588 
589 static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo,
590  uint64_t Address,
591  const void* Decoder) {
592  if (RegNo > 31)
593  return Fail;
594  unsigned Register = ZZZZDecoderTable[RegNo];
595  Inst.addOperand(MCOperand::createReg(Register));
596  return Success;
597 }
598 
599 static const unsigned PPRDecoderTable[] = {
600  AArch64::P0, AArch64::P1, AArch64::P2, AArch64::P3,
601  AArch64::P4, AArch64::P5, AArch64::P6, AArch64::P7,
602  AArch64::P8, AArch64::P9, AArch64::P10, AArch64::P11,
603  AArch64::P12, AArch64::P13, AArch64::P14, AArch64::P15
604 };
605 
606 static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo,
607  uint64_t Addr, const void *Decoder) {
608  if (RegNo > 15)
609  return Fail;
610 
611  unsigned Register = PPRDecoderTable[RegNo];
612  Inst.addOperand(MCOperand::createReg(Register));
613  return Success;
614 }
615 
616 static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo,
617  uint64_t Addr,
618  const void* Decoder) {
619  if (RegNo > 7)
620  return Fail;
621 
622  // Just reuse the PPR decode table
623  return DecodePPRRegisterClass(Inst, RegNo, Addr, Decoder);
624 }
625 
626 static const unsigned VectorDecoderTable[] = {
627  AArch64::Q0, AArch64::Q1, AArch64::Q2, AArch64::Q3, AArch64::Q4,
628  AArch64::Q5, AArch64::Q6, AArch64::Q7, AArch64::Q8, AArch64::Q9,
629  AArch64::Q10, AArch64::Q11, AArch64::Q12, AArch64::Q13, AArch64::Q14,
630  AArch64::Q15, AArch64::Q16, AArch64::Q17, AArch64::Q18, AArch64::Q19,
631  AArch64::Q20, AArch64::Q21, AArch64::Q22, AArch64::Q23, AArch64::Q24,
632  AArch64::Q25, AArch64::Q26, AArch64::Q27, AArch64::Q28, AArch64::Q29,
633  AArch64::Q30, AArch64::Q31
634 };
635 
636 static DecodeStatus DecodeVectorRegisterClass(MCInst &Inst, unsigned RegNo,
637  uint64_t Addr,
638  const void *Decoder) {
639  if (RegNo > 31)
640  return Fail;
641 
642  unsigned Register = VectorDecoderTable[RegNo];
643  Inst.addOperand(MCOperand::createReg(Register));
644  return Success;
645 }
646 
647 static const unsigned QQDecoderTable[] = {
648  AArch64::Q0_Q1, AArch64::Q1_Q2, AArch64::Q2_Q3, AArch64::Q3_Q4,
649  AArch64::Q4_Q5, AArch64::Q5_Q6, AArch64::Q6_Q7, AArch64::Q7_Q8,
650  AArch64::Q8_Q9, AArch64::Q9_Q10, AArch64::Q10_Q11, AArch64::Q11_Q12,
651  AArch64::Q12_Q13, AArch64::Q13_Q14, AArch64::Q14_Q15, AArch64::Q15_Q16,
652  AArch64::Q16_Q17, AArch64::Q17_Q18, AArch64::Q18_Q19, AArch64::Q19_Q20,
653  AArch64::Q20_Q21, AArch64::Q21_Q22, AArch64::Q22_Q23, AArch64::Q23_Q24,
654  AArch64::Q24_Q25, AArch64::Q25_Q26, AArch64::Q26_Q27, AArch64::Q27_Q28,
655  AArch64::Q28_Q29, AArch64::Q29_Q30, AArch64::Q30_Q31, AArch64::Q31_Q0
656 };
657 
658 static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo,
659  uint64_t Addr, const void *Decoder) {
660  if (RegNo > 31)
661  return Fail;
662  unsigned Register = QQDecoderTable[RegNo];
663  Inst.addOperand(MCOperand::createReg(Register));
664  return Success;
665 }
666 
667 static const unsigned QQQDecoderTable[] = {
668  AArch64::Q0_Q1_Q2, AArch64::Q1_Q2_Q3, AArch64::Q2_Q3_Q4,
669  AArch64::Q3_Q4_Q5, AArch64::Q4_Q5_Q6, AArch64::Q5_Q6_Q7,
670  AArch64::Q6_Q7_Q8, AArch64::Q7_Q8_Q9, AArch64::Q8_Q9_Q10,
671  AArch64::Q9_Q10_Q11, AArch64::Q10_Q11_Q12, AArch64::Q11_Q12_Q13,
672  AArch64::Q12_Q13_Q14, AArch64::Q13_Q14_Q15, AArch64::Q14_Q15_Q16,
673  AArch64::Q15_Q16_Q17, AArch64::Q16_Q17_Q18, AArch64::Q17_Q18_Q19,
674  AArch64::Q18_Q19_Q20, AArch64::Q19_Q20_Q21, AArch64::Q20_Q21_Q22,
675  AArch64::Q21_Q22_Q23, AArch64::Q22_Q23_Q24, AArch64::Q23_Q24_Q25,
676  AArch64::Q24_Q25_Q26, AArch64::Q25_Q26_Q27, AArch64::Q26_Q27_Q28,
677  AArch64::Q27_Q28_Q29, AArch64::Q28_Q29_Q30, AArch64::Q29_Q30_Q31,
678  AArch64::Q30_Q31_Q0, AArch64::Q31_Q0_Q1
679 };
680 
681 static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo,
682  uint64_t Addr, const void *Decoder) {
683  if (RegNo > 31)
684  return Fail;
685  unsigned Register = QQQDecoderTable[RegNo];
686  Inst.addOperand(MCOperand::createReg(Register));
687  return Success;
688 }
689 
690 static const unsigned QQQQDecoderTable[] = {
691  AArch64::Q0_Q1_Q2_Q3, AArch64::Q1_Q2_Q3_Q4, AArch64::Q2_Q3_Q4_Q5,
692  AArch64::Q3_Q4_Q5_Q6, AArch64::Q4_Q5_Q6_Q7, AArch64::Q5_Q6_Q7_Q8,
693  AArch64::Q6_Q7_Q8_Q9, AArch64::Q7_Q8_Q9_Q10, AArch64::Q8_Q9_Q10_Q11,
694  AArch64::Q9_Q10_Q11_Q12, AArch64::Q10_Q11_Q12_Q13, AArch64::Q11_Q12_Q13_Q14,
695  AArch64::Q12_Q13_Q14_Q15, AArch64::Q13_Q14_Q15_Q16, AArch64::Q14_Q15_Q16_Q17,
696  AArch64::Q15_Q16_Q17_Q18, AArch64::Q16_Q17_Q18_Q19, AArch64::Q17_Q18_Q19_Q20,
697  AArch64::Q18_Q19_Q20_Q21, AArch64::Q19_Q20_Q21_Q22, AArch64::Q20_Q21_Q22_Q23,
698  AArch64::Q21_Q22_Q23_Q24, AArch64::Q22_Q23_Q24_Q25, AArch64::Q23_Q24_Q25_Q26,
699  AArch64::Q24_Q25_Q26_Q27, AArch64::Q25_Q26_Q27_Q28, AArch64::Q26_Q27_Q28_Q29,
700  AArch64::Q27_Q28_Q29_Q30, AArch64::Q28_Q29_Q30_Q31, AArch64::Q29_Q30_Q31_Q0,
701  AArch64::Q30_Q31_Q0_Q1, AArch64::Q31_Q0_Q1_Q2
702 };
703 
704 static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo,
705  uint64_t Addr,
706  const void *Decoder) {
707  if (RegNo > 31)
708  return Fail;
709  unsigned Register = QQQQDecoderTable[RegNo];
710  Inst.addOperand(MCOperand::createReg(Register));
711  return Success;
712 }
713 
714 static const unsigned DDDecoderTable[] = {
715  AArch64::D0_D1, AArch64::D1_D2, AArch64::D2_D3, AArch64::D3_D4,
716  AArch64::D4_D5, AArch64::D5_D6, AArch64::D6_D7, AArch64::D7_D8,
717  AArch64::D8_D9, AArch64::D9_D10, AArch64::D10_D11, AArch64::D11_D12,
718  AArch64::D12_D13, AArch64::D13_D14, AArch64::D14_D15, AArch64::D15_D16,
719  AArch64::D16_D17, AArch64::D17_D18, AArch64::D18_D19, AArch64::D19_D20,
720  AArch64::D20_D21, AArch64::D21_D22, AArch64::D22_D23, AArch64::D23_D24,
721  AArch64::D24_D25, AArch64::D25_D26, AArch64::D26_D27, AArch64::D27_D28,
722  AArch64::D28_D29, AArch64::D29_D30, AArch64::D30_D31, AArch64::D31_D0
723 };
724 
725 static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo,
726  uint64_t Addr, const void *Decoder) {
727  if (RegNo > 31)
728  return Fail;
729  unsigned Register = DDDecoderTable[RegNo];
730  Inst.addOperand(MCOperand::createReg(Register));
731  return Success;
732 }
733 
734 static const unsigned DDDDecoderTable[] = {
735  AArch64::D0_D1_D2, AArch64::D1_D2_D3, AArch64::D2_D3_D4,
736  AArch64::D3_D4_D5, AArch64::D4_D5_D6, AArch64::D5_D6_D7,
737  AArch64::D6_D7_D8, AArch64::D7_D8_D9, AArch64::D8_D9_D10,
738  AArch64::D9_D10_D11, AArch64::D10_D11_D12, AArch64::D11_D12_D13,
739  AArch64::D12_D13_D14, AArch64::D13_D14_D15, AArch64::D14_D15_D16,
740  AArch64::D15_D16_D17, AArch64::D16_D17_D18, AArch64::D17_D18_D19,
741  AArch64::D18_D19_D20, AArch64::D19_D20_D21, AArch64::D20_D21_D22,
742  AArch64::D21_D22_D23, AArch64::D22_D23_D24, AArch64::D23_D24_D25,
743  AArch64::D24_D25_D26, AArch64::D25_D26_D27, AArch64::D26_D27_D28,
744  AArch64::D27_D28_D29, AArch64::D28_D29_D30, AArch64::D29_D30_D31,
745  AArch64::D30_D31_D0, AArch64::D31_D0_D1
746 };
747 
748 static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo,
749  uint64_t Addr, const void *Decoder) {
750  if (RegNo > 31)
751  return Fail;
752  unsigned Register = DDDDecoderTable[RegNo];
753  Inst.addOperand(MCOperand::createReg(Register));
754  return Success;
755 }
756 
757 static const unsigned DDDDDecoderTable[] = {
758  AArch64::D0_D1_D2_D3, AArch64::D1_D2_D3_D4, AArch64::D2_D3_D4_D5,
759  AArch64::D3_D4_D5_D6, AArch64::D4_D5_D6_D7, AArch64::D5_D6_D7_D8,
760  AArch64::D6_D7_D8_D9, AArch64::D7_D8_D9_D10, AArch64::D8_D9_D10_D11,
761  AArch64::D9_D10_D11_D12, AArch64::D10_D11_D12_D13, AArch64::D11_D12_D13_D14,
762  AArch64::D12_D13_D14_D15, AArch64::D13_D14_D15_D16, AArch64::D14_D15_D16_D17,
763  AArch64::D15_D16_D17_D18, AArch64::D16_D17_D18_D19, AArch64::D17_D18_D19_D20,
764  AArch64::D18_D19_D20_D21, AArch64::D19_D20_D21_D22, AArch64::D20_D21_D22_D23,
765  AArch64::D21_D22_D23_D24, AArch64::D22_D23_D24_D25, AArch64::D23_D24_D25_D26,
766  AArch64::D24_D25_D26_D27, AArch64::D25_D26_D27_D28, AArch64::D26_D27_D28_D29,
767  AArch64::D27_D28_D29_D30, AArch64::D28_D29_D30_D31, AArch64::D29_D30_D31_D0,
768  AArch64::D30_D31_D0_D1, AArch64::D31_D0_D1_D2
769 };
770 
771 static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo,
772  uint64_t Addr,
773  const void *Decoder) {
774  if (RegNo > 31)
775  return Fail;
776  unsigned Register = DDDDDecoderTable[RegNo];
777  Inst.addOperand(MCOperand::createReg(Register));
778  return Success;
779 }
780 
781 static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm,
782  uint64_t Addr,
783  const void *Decoder) {
784  // scale{5} is asserted as 1 in tblgen.
785  Imm |= 0x20;
786  Inst.addOperand(MCOperand::createImm(64 - Imm));
787  return Success;
788 }
789 
790 static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm,
791  uint64_t Addr,
792  const void *Decoder) {
793  Inst.addOperand(MCOperand::createImm(64 - Imm));
794  return Success;
795 }
796 
797 static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm,
798  uint64_t Addr, const void *Decoder) {
799  int64_t ImmVal = Imm;
800  const AArch64Disassembler *Dis =
801  static_cast<const AArch64Disassembler *>(Decoder);
802 
803  // Sign-extend 19-bit immediate.
804  if (ImmVal & (1 << (19 - 1)))
805  ImmVal |= ~((1LL << 19) - 1);
806 
807  if (!Dis->tryAddingSymbolicOperand(Inst, ImmVal * 4, Addr,
808  Inst.getOpcode() != AArch64::LDRXl, 0, 4))
809  Inst.addOperand(MCOperand::createImm(ImmVal));
810  return Success;
811 }
812 
813 static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm,
814  uint64_t Address, const void *Decoder) {
815  Inst.addOperand(MCOperand::createImm((Imm >> 1) & 1));
816  Inst.addOperand(MCOperand::createImm(Imm & 1));
817  return Success;
818 }
819 
820 static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm,
821  uint64_t Address,
822  const void *Decoder) {
823  Inst.addOperand(MCOperand::createImm(Imm));
824 
825  // Every system register in the encoding space is valid with the syntax
826  // S<op0>_<op1>_<Cn>_<Cm>_<op2>, so decoding system registers always succeeds.
827  return Success;
828 }
829 
830 static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm,
831  uint64_t Address,
832  const void *Decoder) {
833  Inst.addOperand(MCOperand::createImm(Imm));
834 
835  return Success;
836 }
837 
838 static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn,
839  uint64_t Address,
840  const void *Decoder) {
841  // This decoder exists to add the dummy Lane operand to the MCInst, which must
842  // be 1 in assembly but has no other real manifestation.
843  unsigned Rd = fieldFromInstruction(Insn, 0, 5);
844  unsigned Rn = fieldFromInstruction(Insn, 5, 5);
845  unsigned IsToVec = fieldFromInstruction(Insn, 16, 1);
846 
847  if (IsToVec) {
848  DecodeFPR128RegisterClass(Inst, Rd, Address, Decoder);
849  DecodeGPR64RegisterClass(Inst, Rn, Address, Decoder);
850  } else {
851  DecodeGPR64RegisterClass(Inst, Rd, Address, Decoder);
852  DecodeFPR128RegisterClass(Inst, Rn, Address, Decoder);
853  }
854 
855  // Add the lane
856  Inst.addOperand(MCOperand::createImm(1));
857 
858  return Success;
859 }
860 
861 static DecodeStatus DecodeVecShiftRImm(MCInst &Inst, unsigned Imm,
862  unsigned Add) {
863  Inst.addOperand(MCOperand::createImm(Add - Imm));
864  return Success;
865 }
866 
867 static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm,
868  unsigned Add) {
869  Inst.addOperand(MCOperand::createImm((Imm + Add) & (Add - 1)));
870  return Success;
871 }
872 
873 static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm,
874  uint64_t Addr, const void *Decoder) {
875  return DecodeVecShiftRImm(Inst, Imm, 64);
876 }
877 
878 static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm,
879  uint64_t Addr,
880  const void *Decoder) {
881  return DecodeVecShiftRImm(Inst, Imm | 0x20, 64);
882 }
883 
884 static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm,
885  uint64_t Addr, const void *Decoder) {
886  return DecodeVecShiftRImm(Inst, Imm, 32);
887 }
888 
889 static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm,
890  uint64_t Addr,
891  const void *Decoder) {
892  return DecodeVecShiftRImm(Inst, Imm | 0x10, 32);
893 }
894 
895 static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm,
896  uint64_t Addr, const void *Decoder) {
897  return DecodeVecShiftRImm(Inst, Imm, 16);
898 }
899 
900 static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm,
901  uint64_t Addr,
902  const void *Decoder) {
903  return DecodeVecShiftRImm(Inst, Imm | 0x8, 16);
904 }
905 
906 static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm,
907  uint64_t Addr, const void *Decoder) {
908  return DecodeVecShiftRImm(Inst, Imm, 8);
909 }
910 
911 static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm,
912  uint64_t Addr, const void *Decoder) {
913  return DecodeVecShiftLImm(Inst, Imm, 64);
914 }
915 
916 static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm,
917  uint64_t Addr, const void *Decoder) {
918  return DecodeVecShiftLImm(Inst, Imm, 32);
919 }
920 
921 static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm,
922  uint64_t Addr, const void *Decoder) {
923  return DecodeVecShiftLImm(Inst, Imm, 16);
924 }
925 
926 static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm,
927  uint64_t Addr, const void *Decoder) {
928  return DecodeVecShiftLImm(Inst, Imm, 8);
929 }
930 
931 static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn,
932  uint64_t Addr,
933  const void *Decoder) {
934  unsigned Rd = fieldFromInstruction(insn, 0, 5);
935  unsigned Rn = fieldFromInstruction(insn, 5, 5);
936  unsigned Rm = fieldFromInstruction(insn, 16, 5);
937  unsigned shiftHi = fieldFromInstruction(insn, 22, 2);
938  unsigned shiftLo = fieldFromInstruction(insn, 10, 6);
939  unsigned shift = (shiftHi << 6) | shiftLo;
940  switch (Inst.getOpcode()) {
941  default:
942  return Fail;
943  case AArch64::ADDWrs:
944  case AArch64::ADDSWrs:
945  case AArch64::SUBWrs:
946  case AArch64::SUBSWrs:
947  // if shift == '11' then ReservedValue()
948  if (shiftHi == 0x3)
949  return Fail;
950  LLVM_FALLTHROUGH;
951  case AArch64::ANDWrs:
952  case AArch64::ANDSWrs:
953  case AArch64::BICWrs:
954  case AArch64::BICSWrs:
955  case AArch64::ORRWrs:
956  case AArch64::ORNWrs:
957  case AArch64::EORWrs:
958  case AArch64::EONWrs: {
959  // if sf == '0' and imm6<5> == '1' then ReservedValue()
960  if (shiftLo >> 5 == 1)
961  return Fail;
962  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
963  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
964  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
965  break;
966  }
967  case AArch64::ADDXrs:
968  case AArch64::ADDSXrs:
969  case AArch64::SUBXrs:
970  case AArch64::SUBSXrs:
971  // if shift == '11' then ReservedValue()
972  if (shiftHi == 0x3)
973  return Fail;
974  LLVM_FALLTHROUGH;
975  case AArch64::ANDXrs:
976  case AArch64::ANDSXrs:
977  case AArch64::BICXrs:
978  case AArch64::BICSXrs:
979  case AArch64::ORRXrs:
980  case AArch64::ORNXrs:
981  case AArch64::EORXrs:
982  case AArch64::EONXrs:
983  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
984  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
985  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
986  break;
987  }
988 
989  Inst.addOperand(MCOperand::createImm(shift));
990  return Success;
991 }
992 
993 static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn,
994  uint64_t Addr,
995  const void *Decoder) {
996  unsigned Rd = fieldFromInstruction(insn, 0, 5);
997  unsigned imm = fieldFromInstruction(insn, 5, 16);
998  unsigned shift = fieldFromInstruction(insn, 21, 2);
999  shift <<= 4;
1000  switch (Inst.getOpcode()) {
1001  default:
1002  return Fail;
1003  case AArch64::MOVZWi:
1004  case AArch64::MOVNWi:
1005  case AArch64::MOVKWi:
1006  if (shift & (1U << 5))
1007  return Fail;
1008  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1009  break;
1010  case AArch64::MOVZXi:
1011  case AArch64::MOVNXi:
1012  case AArch64::MOVKXi:
1013  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1014  break;
1015  }
1016 
1017  if (Inst.getOpcode() == AArch64::MOVKWi ||
1018  Inst.getOpcode() == AArch64::MOVKXi)
1019  Inst.addOperand(Inst.getOperand(0));
1020 
1021  Inst.addOperand(MCOperand::createImm(imm));
1022  Inst.addOperand(MCOperand::createImm(shift));
1023  return Success;
1024 }
1025 
1026 static DecodeStatus DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn,
1027  uint64_t Addr,
1028  const void *Decoder) {
1029  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1030  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1031  unsigned offset = fieldFromInstruction(insn, 10, 12);
1032  const AArch64Disassembler *Dis =
1033  static_cast<const AArch64Disassembler *>(Decoder);
1034 
1035  switch (Inst.getOpcode()) {
1036  default:
1037  return Fail;
1038  case AArch64::PRFMui:
1039  // Rt is an immediate in prefetch.
1040  Inst.addOperand(MCOperand::createImm(Rt));
1041  break;
1042  case AArch64::STRBBui:
1043  case AArch64::LDRBBui:
1044  case AArch64::LDRSBWui:
1045  case AArch64::STRHHui:
1046  case AArch64::LDRHHui:
1047  case AArch64::LDRSHWui:
1048  case AArch64::STRWui:
1049  case AArch64::LDRWui:
1050  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1051  break;
1052  case AArch64::LDRSBXui:
1053  case AArch64::LDRSHXui:
1054  case AArch64::LDRSWui:
1055  case AArch64::STRXui:
1056  case AArch64::LDRXui:
1057  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1058  break;
1059  case AArch64::LDRQui:
1060  case AArch64::STRQui:
1061  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1062  break;
1063  case AArch64::LDRDui:
1064  case AArch64::STRDui:
1065  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1066  break;
1067  case AArch64::LDRSui:
1068  case AArch64::STRSui:
1069  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1070  break;
1071  case AArch64::LDRHui:
1072  case AArch64::STRHui:
1073  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1074  break;
1075  case AArch64::LDRBui:
1076  case AArch64::STRBui:
1077  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1078  break;
1079  }
1080 
1081  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1082  if (!Dis->tryAddingSymbolicOperand(Inst, offset, Addr, Fail, 0, 4))
1083  Inst.addOperand(MCOperand::createImm(offset));
1084  return Success;
1085 }
1086 
1087 static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn,
1088  uint64_t Addr,
1089  const void *Decoder) {
1090  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1091  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1092  int64_t offset = fieldFromInstruction(insn, 12, 9);
1093 
1094  // offset is a 9-bit signed immediate, so sign extend it to
1095  // fill the unsigned.
1096  if (offset & (1 << (9 - 1)))
1097  offset |= ~((1LL << 9) - 1);
1098 
1099  // First operand is always the writeback to the address register, if needed.
1100  switch (Inst.getOpcode()) {
1101  default:
1102  break;
1103  case AArch64::LDRSBWpre:
1104  case AArch64::LDRSHWpre:
1105  case AArch64::STRBBpre:
1106  case AArch64::LDRBBpre:
1107  case AArch64::STRHHpre:
1108  case AArch64::LDRHHpre:
1109  case AArch64::STRWpre:
1110  case AArch64::LDRWpre:
1111  case AArch64::LDRSBWpost:
1112  case AArch64::LDRSHWpost:
1113  case AArch64::STRBBpost:
1114  case AArch64::LDRBBpost:
1115  case AArch64::STRHHpost:
1116  case AArch64::LDRHHpost:
1117  case AArch64::STRWpost:
1118  case AArch64::LDRWpost:
1119  case AArch64::LDRSBXpre:
1120  case AArch64::LDRSHXpre:
1121  case AArch64::STRXpre:
1122  case AArch64::LDRSWpre:
1123  case AArch64::LDRXpre:
1124  case AArch64::LDRSBXpost:
1125  case AArch64::LDRSHXpost:
1126  case AArch64::STRXpost:
1127  case AArch64::LDRSWpost:
1128  case AArch64::LDRXpost:
1129  case AArch64::LDRQpre:
1130  case AArch64::STRQpre:
1131  case AArch64::LDRQpost:
1132  case AArch64::STRQpost:
1133  case AArch64::LDRDpre:
1134  case AArch64::STRDpre:
1135  case AArch64::LDRDpost:
1136  case AArch64::STRDpost:
1137  case AArch64::LDRSpre:
1138  case AArch64::STRSpre:
1139  case AArch64::LDRSpost:
1140  case AArch64::STRSpost:
1141  case AArch64::LDRHpre:
1142  case AArch64::STRHpre:
1143  case AArch64::LDRHpost:
1144  case AArch64::STRHpost:
1145  case AArch64::LDRBpre:
1146  case AArch64::STRBpre:
1147  case AArch64::LDRBpost:
1148  case AArch64::STRBpost:
1149  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1150  break;
1151  }
1152 
1153  switch (Inst.getOpcode()) {
1154  default:
1155  return Fail;
1156  case AArch64::PRFUMi:
1157  // Rt is an immediate in prefetch.
1158  Inst.addOperand(MCOperand::createImm(Rt));
1159  break;
1160  case AArch64::STURBBi:
1161  case AArch64::LDURBBi:
1162  case AArch64::LDURSBWi:
1163  case AArch64::STURHHi:
1164  case AArch64::LDURHHi:
1165  case AArch64::LDURSHWi:
1166  case AArch64::STURWi:
1167  case AArch64::LDURWi:
1168  case AArch64::LDTRSBWi:
1169  case AArch64::LDTRSHWi:
1170  case AArch64::STTRWi:
1171  case AArch64::LDTRWi:
1172  case AArch64::STTRHi:
1173  case AArch64::LDTRHi:
1174  case AArch64::LDTRBi:
1175  case AArch64::STTRBi:
1176  case AArch64::LDRSBWpre:
1177  case AArch64::LDRSHWpre:
1178  case AArch64::STRBBpre:
1179  case AArch64::LDRBBpre:
1180  case AArch64::STRHHpre:
1181  case AArch64::LDRHHpre:
1182  case AArch64::STRWpre:
1183  case AArch64::LDRWpre:
1184  case AArch64::LDRSBWpost:
1185  case AArch64::LDRSHWpost:
1186  case AArch64::STRBBpost:
1187  case AArch64::LDRBBpost:
1188  case AArch64::STRHHpost:
1189  case AArch64::LDRHHpost:
1190  case AArch64::STRWpost:
1191  case AArch64::LDRWpost:
1192  case AArch64::STLURBi:
1193  case AArch64::STLURHi:
1194  case AArch64::STLURWi:
1195  case AArch64::LDAPURBi:
1196  case AArch64::LDAPURSBWi:
1197  case AArch64::LDAPURHi:
1198  case AArch64::LDAPURSHWi:
1199  case AArch64::LDAPURi:
1200  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1201  break;
1202  case AArch64::LDURSBXi:
1203  case AArch64::LDURSHXi:
1204  case AArch64::LDURSWi:
1205  case AArch64::STURXi:
1206  case AArch64::LDURXi:
1207  case AArch64::LDTRSBXi:
1208  case AArch64::LDTRSHXi:
1209  case AArch64::LDTRSWi:
1210  case AArch64::STTRXi:
1211  case AArch64::LDTRXi:
1212  case AArch64::LDRSBXpre:
1213  case AArch64::LDRSHXpre:
1214  case AArch64::STRXpre:
1215  case AArch64::LDRSWpre:
1216  case AArch64::LDRXpre:
1217  case AArch64::LDRSBXpost:
1218  case AArch64::LDRSHXpost:
1219  case AArch64::STRXpost:
1220  case AArch64::LDRSWpost:
1221  case AArch64::LDRXpost:
1222  case AArch64::LDAPURSWi:
1223  case AArch64::LDAPURSHXi:
1224  case AArch64::LDAPURSBXi:
1225  case AArch64::STLURXi:
1226  case AArch64::LDAPURXi:
1227  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1228  break;
1229  case AArch64::LDURQi:
1230  case AArch64::STURQi:
1231  case AArch64::LDRQpre:
1232  case AArch64::STRQpre:
1233  case AArch64::LDRQpost:
1234  case AArch64::STRQpost:
1235  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1236  break;
1237  case AArch64::LDURDi:
1238  case AArch64::STURDi:
1239  case AArch64::LDRDpre:
1240  case AArch64::STRDpre:
1241  case AArch64::LDRDpost:
1242  case AArch64::STRDpost:
1243  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1244  break;
1245  case AArch64::LDURSi:
1246  case AArch64::STURSi:
1247  case AArch64::LDRSpre:
1248  case AArch64::STRSpre:
1249  case AArch64::LDRSpost:
1250  case AArch64::STRSpost:
1251  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1252  break;
1253  case AArch64::LDURHi:
1254  case AArch64::STURHi:
1255  case AArch64::LDRHpre:
1256  case AArch64::STRHpre:
1257  case AArch64::LDRHpost:
1258  case AArch64::STRHpost:
1259  DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder);
1260  break;
1261  case AArch64::LDURBi:
1262  case AArch64::STURBi:
1263  case AArch64::LDRBpre:
1264  case AArch64::STRBpre:
1265  case AArch64::LDRBpost:
1266  case AArch64::STRBpost:
1267  DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder);
1268  break;
1269  }
1270 
1271  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1272  Inst.addOperand(MCOperand::createImm(offset));
1273 
1274  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1275  bool IsIndexed = fieldFromInstruction(insn, 10, 2) != 0;
1276  bool IsFP = fieldFromInstruction(insn, 26, 1);
1277 
1278  // Cannot write back to a transfer register (but xzr != sp).
1279  if (IsLoad && IsIndexed && !IsFP && Rn != 31 && Rt == Rn)
1280  return SoftFail;
1281 
1282  return Success;
1283 }
1284 
1285 static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn,
1286  uint64_t Addr,
1287  const void *Decoder) {
1288  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1289  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1290  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1291  unsigned Rs = fieldFromInstruction(insn, 16, 5);
1292 
1293  unsigned Opcode = Inst.getOpcode();
1294  switch (Opcode) {
1295  default:
1296  return Fail;
1297  case AArch64::STLXRW:
1298  case AArch64::STLXRB:
1299  case AArch64::STLXRH:
1300  case AArch64::STXRW:
1301  case AArch64::STXRB:
1302  case AArch64::STXRH:
1303  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1304  LLVM_FALLTHROUGH;
1305  case AArch64::LDARW:
1306  case AArch64::LDARB:
1307  case AArch64::LDARH:
1308  case AArch64::LDAXRW:
1309  case AArch64::LDAXRB:
1310  case AArch64::LDAXRH:
1311  case AArch64::LDXRW:
1312  case AArch64::LDXRB:
1313  case AArch64::LDXRH:
1314  case AArch64::STLRW:
1315  case AArch64::STLRB:
1316  case AArch64::STLRH:
1317  case AArch64::STLLRW:
1318  case AArch64::STLLRB:
1319  case AArch64::STLLRH:
1320  case AArch64::LDLARW:
1321  case AArch64::LDLARB:
1322  case AArch64::LDLARH:
1323  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1324  break;
1325  case AArch64::STLXRX:
1326  case AArch64::STXRX:
1327  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1328  LLVM_FALLTHROUGH;
1329  case AArch64::LDARX:
1330  case AArch64::LDAXRX:
1331  case AArch64::LDXRX:
1332  case AArch64::STLRX:
1333  case AArch64::LDLARX:
1334  case AArch64::STLLRX:
1335  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1336  break;
1337  case AArch64::STLXPW:
1338  case AArch64::STXPW:
1339  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1340  LLVM_FALLTHROUGH;
1341  case AArch64::LDAXPW:
1342  case AArch64::LDXPW:
1343  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1344  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1345  break;
1346  case AArch64::STLXPX:
1347  case AArch64::STXPX:
1348  DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder);
1349  LLVM_FALLTHROUGH;
1350  case AArch64::LDAXPX:
1351  case AArch64::LDXPX:
1352  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1353  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1354  break;
1355  }
1356 
1357  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1358 
1359  // You shouldn't load to the same register twice in an instruction...
1360  if ((Opcode == AArch64::LDAXPW || Opcode == AArch64::LDXPW ||
1361  Opcode == AArch64::LDAXPX || Opcode == AArch64::LDXPX) &&
1362  Rt == Rt2)
1363  return SoftFail;
1364 
1365  return Success;
1366 }
1367 
1368 static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn,
1369  uint64_t Addr,
1370  const void *Decoder) {
1371  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1372  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1373  unsigned Rt2 = fieldFromInstruction(insn, 10, 5);
1374  int64_t offset = fieldFromInstruction(insn, 15, 7);
1375  bool IsLoad = fieldFromInstruction(insn, 22, 1);
1376 
1377  // offset is a 7-bit signed immediate, so sign extend it to
1378  // fill the unsigned.
1379  if (offset & (1 << (7 - 1)))
1380  offset |= ~((1LL << 7) - 1);
1381 
1382  unsigned Opcode = Inst.getOpcode();
1383  bool NeedsDisjointWritebackTransfer = false;
1384 
1385  // First operand is always writeback of base register.
1386  switch (Opcode) {
1387  default:
1388  break;
1389  case AArch64::LDPXpost:
1390  case AArch64::STPXpost:
1391  case AArch64::LDPSWpost:
1392  case AArch64::LDPXpre:
1393  case AArch64::STPXpre:
1394  case AArch64::LDPSWpre:
1395  case AArch64::LDPWpost:
1396  case AArch64::STPWpost:
1397  case AArch64::LDPWpre:
1398  case AArch64::STPWpre:
1399  case AArch64::LDPQpost:
1400  case AArch64::STPQpost:
1401  case AArch64::LDPQpre:
1402  case AArch64::STPQpre:
1403  case AArch64::LDPDpost:
1404  case AArch64::STPDpost:
1405  case AArch64::LDPDpre:
1406  case AArch64::STPDpre:
1407  case AArch64::LDPSpost:
1408  case AArch64::STPSpost:
1409  case AArch64::LDPSpre:
1410  case AArch64::STPSpre:
1411  case AArch64::STGPpre:
1412  case AArch64::STGPpost:
1413  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1414  break;
1415  }
1416 
1417  switch (Opcode) {
1418  default:
1419  return Fail;
1420  case AArch64::LDPXpost:
1421  case AArch64::STPXpost:
1422  case AArch64::LDPSWpost:
1423  case AArch64::LDPXpre:
1424  case AArch64::STPXpre:
1425  case AArch64::LDPSWpre:
1426  case AArch64::STGPpre:
1427  case AArch64::STGPpost:
1428  NeedsDisjointWritebackTransfer = true;
1429  LLVM_FALLTHROUGH;
1430  case AArch64::LDNPXi:
1431  case AArch64::STNPXi:
1432  case AArch64::LDPXi:
1433  case AArch64::STPXi:
1434  case AArch64::LDPSWi:
1435  case AArch64::STGPi:
1436  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1437  DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1438  break;
1439  case AArch64::LDPWpost:
1440  case AArch64::STPWpost:
1441  case AArch64::LDPWpre:
1442  case AArch64::STPWpre:
1443  NeedsDisjointWritebackTransfer = true;
1444  LLVM_FALLTHROUGH;
1445  case AArch64::LDNPWi:
1446  case AArch64::STNPWi:
1447  case AArch64::LDPWi:
1448  case AArch64::STPWi:
1449  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1450  DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1451  break;
1452  case AArch64::LDNPQi:
1453  case AArch64::STNPQi:
1454  case AArch64::LDPQpost:
1455  case AArch64::STPQpost:
1456  case AArch64::LDPQi:
1457  case AArch64::STPQi:
1458  case AArch64::LDPQpre:
1459  case AArch64::STPQpre:
1460  DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder);
1461  DecodeFPR128RegisterClass(Inst, Rt2, Addr, Decoder);
1462  break;
1463  case AArch64::LDNPDi:
1464  case AArch64::STNPDi:
1465  case AArch64::LDPDpost:
1466  case AArch64::STPDpost:
1467  case AArch64::LDPDi:
1468  case AArch64::STPDi:
1469  case AArch64::LDPDpre:
1470  case AArch64::STPDpre:
1471  DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder);
1472  DecodeFPR64RegisterClass(Inst, Rt2, Addr, Decoder);
1473  break;
1474  case AArch64::LDNPSi:
1475  case AArch64::STNPSi:
1476  case AArch64::LDPSpost:
1477  case AArch64::STPSpost:
1478  case AArch64::LDPSi:
1479  case AArch64::STPSi:
1480  case AArch64::LDPSpre:
1481  case AArch64::STPSpre:
1482  DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder);
1483  DecodeFPR32RegisterClass(Inst, Rt2, Addr, Decoder);
1484  break;
1485  }
1486 
1487  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1488  Inst.addOperand(MCOperand::createImm(offset));
1489 
1490  // You shouldn't load to the same register twice in an instruction...
1491  if (IsLoad && Rt == Rt2)
1492  return SoftFail;
1493 
1494  // ... or do any operation that writes-back to a transfer register. But note
1495  // that "stp xzr, xzr, [sp], #4" is fine because xzr and sp are different.
1496  if (NeedsDisjointWritebackTransfer && Rn != 31 && (Rt == Rn || Rt2 == Rn))
1497  return SoftFail;
1498 
1499  return Success;
1500 }
1501 
1502 static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn,
1503  uint64_t Addr,
1504  const void *Decoder) {
1505  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1506  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1507  unsigned Rm = fieldFromInstruction(insn, 16, 5);
1508  unsigned extend = fieldFromInstruction(insn, 10, 6);
1509 
1510  unsigned shift = extend & 0x7;
1511  if (shift > 4)
1512  return Fail;
1513 
1514  switch (Inst.getOpcode()) {
1515  default:
1516  return Fail;
1517  case AArch64::ADDWrx:
1518  case AArch64::SUBWrx:
1519  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1520  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1521  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1522  break;
1523  case AArch64::ADDSWrx:
1524  case AArch64::SUBSWrx:
1525  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1526  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1527  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1528  break;
1529  case AArch64::ADDXrx:
1530  case AArch64::SUBXrx:
1531  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1532  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1533  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1534  break;
1535  case AArch64::ADDSXrx:
1536  case AArch64::SUBSXrx:
1537  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1538  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1539  DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder);
1540  break;
1541  case AArch64::ADDXrx64:
1542  case AArch64::SUBXrx64:
1543  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1544  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1545  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1546  break;
1547  case AArch64::SUBSXrx64:
1548  case AArch64::ADDSXrx64:
1549  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1550  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1551  DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder);
1552  break;
1553  }
1554 
1555  Inst.addOperand(MCOperand::createImm(extend));
1556  return Success;
1557 }
1558 
1559 static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn,
1560  uint64_t Addr,
1561  const void *Decoder) {
1562  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1563  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1564  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1565  unsigned imm;
1566 
1567  if (Datasize) {
1568  if (Inst.getOpcode() == AArch64::ANDSXri)
1569  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1570  else
1571  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1572  DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder);
1573  imm = fieldFromInstruction(insn, 10, 13);
1574  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1575  return Fail;
1576  } else {
1577  if (Inst.getOpcode() == AArch64::ANDSWri)
1578  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1579  else
1580  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1581  DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder);
1582  imm = fieldFromInstruction(insn, 10, 12);
1583  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 32))
1584  return Fail;
1585  }
1586  Inst.addOperand(MCOperand::createImm(imm));
1587  return Success;
1588 }
1589 
1590 static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn,
1591  uint64_t Addr,
1592  const void *Decoder) {
1593  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1594  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1595  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1596  imm |= fieldFromInstruction(insn, 5, 5);
1597 
1598  if (Inst.getOpcode() == AArch64::MOVID)
1599  DecodeFPR64RegisterClass(Inst, Rd, Addr, Decoder);
1600  else
1601  DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder);
1602 
1603  Inst.addOperand(MCOperand::createImm(imm));
1604 
1605  switch (Inst.getOpcode()) {
1606  default:
1607  break;
1608  case AArch64::MOVIv4i16:
1609  case AArch64::MOVIv8i16:
1610  case AArch64::MVNIv4i16:
1611  case AArch64::MVNIv8i16:
1612  case AArch64::MOVIv2i32:
1613  case AArch64::MOVIv4i32:
1614  case AArch64::MVNIv2i32:
1615  case AArch64::MVNIv4i32:
1616  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1617  break;
1618  case AArch64::MOVIv2s_msl:
1619  case AArch64::MOVIv4s_msl:
1620  case AArch64::MVNIv2s_msl:
1621  case AArch64::MVNIv4s_msl:
1622  Inst.addOperand(MCOperand::createImm(cmode & 1 ? 0x110 : 0x108));
1623  break;
1624  }
1625 
1626  return Success;
1627 }
1628 
1629 static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn,
1630  uint64_t Addr,
1631  const void *Decoder) {
1632  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1633  unsigned cmode = fieldFromInstruction(insn, 12, 4);
1634  unsigned imm = fieldFromInstruction(insn, 16, 3) << 5;
1635  imm |= fieldFromInstruction(insn, 5, 5);
1636 
1637  // Tied operands added twice.
1638  DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder);
1639  DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder);
1640 
1641  Inst.addOperand(MCOperand::createImm(imm));
1642  Inst.addOperand(MCOperand::createImm((cmode & 6) << 2));
1643 
1644  return Success;
1645 }
1646 
1647 static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn,
1648  uint64_t Addr, const void *Decoder) {
1649  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1650  int64_t imm = fieldFromInstruction(insn, 5, 19) << 2;
1651  imm |= fieldFromInstruction(insn, 29, 2);
1652  const AArch64Disassembler *Dis =
1653  static_cast<const AArch64Disassembler *>(Decoder);
1654 
1655  // Sign-extend the 21-bit immediate.
1656  if (imm & (1 << (21 - 1)))
1657  imm |= ~((1LL << 21) - 1);
1658 
1659  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1660  if (!Dis->tryAddingSymbolicOperand(Inst, imm, Addr, Fail, 0, 4))
1661  Inst.addOperand(MCOperand::createImm(imm));
1662 
1663  return Success;
1664 }
1665 
1666 static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn,
1667  uint64_t Addr, const void *Decoder) {
1668  unsigned Rd = fieldFromInstruction(insn, 0, 5);
1669  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1670  unsigned Imm = fieldFromInstruction(insn, 10, 14);
1671  unsigned S = fieldFromInstruction(insn, 29, 1);
1672  unsigned Datasize = fieldFromInstruction(insn, 31, 1);
1673 
1674  unsigned ShifterVal = (Imm >> 12) & 3;
1675  unsigned ImmVal = Imm & 0xFFF;
1676  const AArch64Disassembler *Dis =
1677  static_cast<const AArch64Disassembler *>(Decoder);
1678 
1679  if (ShifterVal != 0 && ShifterVal != 1)
1680  return Fail;
1681 
1682  if (Datasize) {
1683  if (Rd == 31 && !S)
1684  DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder);
1685  else
1686  DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder);
1687  DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder);
1688  } else {
1689  if (Rd == 31 && !S)
1690  DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder);
1691  else
1692  DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder);
1693  DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder);
1694  }
1695 
1696  if (!Dis->tryAddingSymbolicOperand(Inst, Imm, Addr, Fail, 0, 4))
1697  Inst.addOperand(MCOperand::createImm(ImmVal));
1698  Inst.addOperand(MCOperand::createImm(12 * ShifterVal));
1699  return Success;
1700 }
1701 
1702 static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn,
1703  uint64_t Addr,
1704  const void *Decoder) {
1705  int64_t imm = fieldFromInstruction(insn, 0, 26);
1706  const AArch64Disassembler *Dis =
1707  static_cast<const AArch64Disassembler *>(Decoder);
1708 
1709  // Sign-extend the 26-bit immediate.
1710  if (imm & (1 << (26 - 1)))
1711  imm |= ~((1LL << 26) - 1);
1712 
1713  if (!Dis->tryAddingSymbolicOperand(Inst, imm * 4, Addr, true, 0, 4))
1714  Inst.addOperand(MCOperand::createImm(imm));
1715 
1716  return Success;
1717 }
1718 
1719 static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn,
1720  uint64_t Addr,
1721  const void *Decoder) {
1722  uint64_t op1 = fieldFromInstruction(insn, 16, 3);
1723  uint64_t op2 = fieldFromInstruction(insn, 5, 3);
1724  uint64_t crm = fieldFromInstruction(insn, 8, 4);
1725  uint64_t pstate_field = (op1 << 3) | op2;
1726 
1727  switch (pstate_field) {
1728  case 0x01: // XAFlag
1729  case 0x02: // AXFlag
1730  return Fail;
1731  }
1732 
1733  if ((pstate_field == AArch64PState::PAN ||
1734  pstate_field == AArch64PState::UAO ||
1735  pstate_field == AArch64PState::SSBS) && crm > 1)
1736  return Fail;
1737 
1738  Inst.addOperand(MCOperand::createImm(pstate_field));
1739  Inst.addOperand(MCOperand::createImm(crm));
1740 
1741  const AArch64Disassembler *Dis =
1742  static_cast<const AArch64Disassembler *>(Decoder);
1743  auto PState = AArch64PState::lookupPStateByEncoding(pstate_field);
1744  if (PState && PState->haveFeatures(Dis->getSubtargetInfo().getFeatureBits()))
1745  return Success;
1746  return Fail;
1747 }
1748 
1749 static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn,
1750  uint64_t Addr, const void *Decoder) {
1751  uint64_t Rt = fieldFromInstruction(insn, 0, 5);
1752  uint64_t bit = fieldFromInstruction(insn, 31, 1) << 5;
1753  bit |= fieldFromInstruction(insn, 19, 5);
1754  int64_t dst = fieldFromInstruction(insn, 5, 14);
1755  const AArch64Disassembler *Dis =
1756  static_cast<const AArch64Disassembler *>(Decoder);
1757 
1758  // Sign-extend 14-bit immediate.
1759  if (dst & (1 << (14 - 1)))
1760  dst |= ~((1LL << 14) - 1);
1761 
1762  if (fieldFromInstruction(insn, 31, 1) == 0)
1763  DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder);
1764  else
1765  DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder);
1766  Inst.addOperand(MCOperand::createImm(bit));
1767  if (!Dis->tryAddingSymbolicOperand(Inst, dst * 4, Addr, true, 0, 4))
1768  Inst.addOperand(MCOperand::createImm(dst));
1769 
1770  return Success;
1771 }
1772 
1773 static DecodeStatus DecodeGPRSeqPairsClassRegisterClass(MCInst &Inst,
1774  unsigned RegClassID,
1775  unsigned RegNo,
1776  uint64_t Addr,
1777  const void *Decoder) {
1778  // Register number must be even (see CASP instruction)
1779  if (RegNo & 0x1)
1780  return Fail;
1781 
1782  unsigned Reg = AArch64MCRegisterClasses[RegClassID].getRegister(RegNo / 2);
1783  Inst.addOperand(MCOperand::createReg(Reg));
1784  return Success;
1785 }
1786 
1787 static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst,
1788  unsigned RegNo,
1789  uint64_t Addr,
1790  const void *Decoder) {
1791  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1792  AArch64::WSeqPairsClassRegClassID,
1793  RegNo, Addr, Decoder);
1794 }
1795 
1796 static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst,
1797  unsigned RegNo,
1798  uint64_t Addr,
1799  const void *Decoder) {
1800  return DecodeGPRSeqPairsClassRegisterClass(Inst,
1801  AArch64::XSeqPairsClassRegClassID,
1802  RegNo, Addr, Decoder);
1803 }
1804 
1805 static DecodeStatus DecodeSVELogicalImmInstruction(llvm::MCInst &Inst,
1806  uint32_t insn,
1807  uint64_t Addr,
1808  const void *Decoder) {
1809  unsigned Zdn = fieldFromInstruction(insn, 0, 5);
1810  unsigned imm = fieldFromInstruction(insn, 5, 13);
1811  if (!AArch64_AM::isValidDecodeLogicalImmediate(imm, 64))
1812  return Fail;
1813 
1814  // The same (tied) operand is added twice to the instruction.
1815  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1816  if (Inst.getOpcode() != AArch64::DUPM_ZI)
1817  DecodeZPRRegisterClass(Inst, Zdn, Addr, Decoder);
1818  Inst.addOperand(MCOperand::createImm(imm));
1819  return Success;
1820 }
1821 
1822 template<int Bits>
1823 static DecodeStatus DecodeSImm(llvm::MCInst &Inst, uint64_t Imm,
1824  uint64_t Address, const void *Decoder) {
1825  if (Imm & ~((1LL << Bits) - 1))
1826  return Fail;
1827 
1828  // Imm is a signed immediate, so sign extend it.
1829  if (Imm & (1 << (Bits - 1)))
1830  Imm |= ~((1LL << Bits) - 1);
1831 
1832  Inst.addOperand(MCOperand::createImm(Imm));
1833  return Success;
1834 }
1835 
1836 // Decode 8-bit signed/unsigned immediate for a given element width.
1837 template <int ElementWidth>
1838 static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm,
1839  uint64_t Addr, const void *Decoder) {
1840  unsigned Val = (uint8_t)Imm;
1841  unsigned Shift = (Imm & 0x100) ? 8 : 0;
1842  if (ElementWidth == 8 && Shift)
1843  return Fail;
1844  Inst.addOperand(MCOperand::createImm(Val));
1845  Inst.addOperand(MCOperand::createImm(Shift));
1846  return Success;
1847 }
1848 
1849 // Decode uimm4 ranged from 1-16.
1850 static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm,
1851  uint64_t Addr, const void *Decoder) {
1852  Inst.addOperand(MCOperand::createImm(Imm + 1));
1853  return Success;
1854 }
1855 
1856 static DecodeStatus DecodeLoadAllocTagArrayInstruction(MCInst &Inst,
1857  uint32_t insn,
1858  uint64_t address,
1859  const void* Decoder) {
1860  unsigned Rn = fieldFromInstruction(insn, 5, 5);
1861  unsigned Rt = fieldFromInstruction(insn, 0, 5);
1862 
1863  // Outputs
1864  DecodeGPR64spRegisterClass(Inst, Rn, address, Decoder);
1865  DecodeGPR64RegisterClass(Inst, Rt, address, Decoder);
1866 
1867  // Input (Rn again)
1868  Inst.addOperand(Inst.getOperand(0));
1869 
1870  //Do this post decode since the raw number for xzr and sp is the same
1871  if (Inst.getOperand(0).getReg() == Inst.getOperand(1).getReg()) {
1872  return SoftFail;
1873  } else {
1874  return Success;
1875  }
1876 }
FPR32DecoderTable
static const unsigned FPR32DecoderTable[]
Definition: AArch64Disassembler.cpp:352
DecodeSystemPStateInstruction
static DecodeStatus DecodeSystemPStateInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1719
DecodeModImmInstruction
static DecodeStatus DecodeModImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1590
Check
static bool Check(DecodeStatus &Out, DecodeStatus In)
Definition: AArch64Disassembler.cpp:228
ZZZDecoderTable
static const unsigned ZZZDecoderTable[]
Definition: AArch64Disassembler.cpp:551
DecodeDDDDRegisterClass
static DecodeStatus DecodeDDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:771
llvm::getTheAArch64beTarget
Target & getTheAArch64beTarget()
Definition: AArch64TargetInfo.cpp:18
DecodeModImmTiedInstruction
static DecodeStatus DecodeModImmTiedInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1629
DecodeGPR64RegisterClass
static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:436
DecodeVecShiftL16Imm
static DecodeStatus DecodeVecShiftL16Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:921
DecodeFMOVLaneInstruction
static DecodeStatus DecodeFMOVLaneInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:838
DecodeQQRegisterClass
static DecodeStatus DecodeQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:658
DecodeMSRSystemRegister
static DecodeStatus DecodeMSRSystemRegister(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:830
llvm
This class represents lattice values for constants.
Definition: AllocatorList.h:24
DecodeGPR64spRegisterClass
static DecodeStatus DecodeGPR64spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:447
DecodePPR_3bRegisterClass
static DecodeStatus DecodePPR_3bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:616
LLVM_FALLTHROUGH
#define LLVM_FALLTHROUGH
Definition: Compiler.h:86
llvm::MCDisassembler::DecodeStatus
DecodeStatus
Ternary decode status.
Definition: MCDisassembler.h:51
DecodeFPR128RegisterClass
static DecodeStatus DecodeFPR128RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:312
llvm::getTheAArch64leTarget
Target & getTheAArch64leTarget()
Definition: AArch64TargetInfo.cpp:14
llvm::MCDisassembler
Superclass for all disassemblers.
Definition: MCDisassembler.h:27
llvm::MCDisassembler::CommentStream
raw_ostream * CommentStream
Definition: MCDisassembler.h:110
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:18
DecodeVecShiftR32ImmNarrow
static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:889
DecodeImm8OptLsl
static DecodeStatus DecodeImm8OptLsl(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1838
Reg
unsigned Reg
Definition: MachineSink.cpp:979
DecodePairLdStInstruction
static DecodeStatus DecodePairLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1368
llvm::TargetRegistry::RegisterMCDisassembler
static void RegisterMCDisassembler(Target &T, Target::MCDisassemblerCtorTy Fn)
RegisterMCDisassembler - Register a MCDisassembler implementation for the given target.
Definition: TargetRegistry.h:808
DecodeVecShiftLImm
static DecodeStatus DecodeVecShiftLImm(MCInst &Inst, unsigned Imm, unsigned Add)
Definition: AArch64Disassembler.cpp:867
DecodeFPR64RegisterClass
static DecodeStatus DecodeFPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:341
DecodeXSeqPairsClassRegisterClass
static DecodeStatus DecodeXSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1796
DecodeUnconditionalBranch
static DecodeStatus DecodeUnconditionalBranch(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1702
DecodeAddSubERegInstruction
static DecodeStatus DecodeAddSubERegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1502
DecodeSVELogicalImmInstruction
static DecodeStatus DecodeSVELogicalImmInstruction(llvm::MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1805
DecodeGPR64commonRegisterClass
static DecodeStatus DecodeGPR64commonRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:425
DecodeExclusiveLdStInstruction
static DecodeStatus DecodeExclusiveLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1285
QQQDecoderTable
static const unsigned QQQDecoderTable[]
Definition: AArch64Disassembler.cpp:667
DecodeVecShiftL64Imm
static DecodeStatus DecodeVecShiftL64Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:911
VectorDecoderTable
static const unsigned VectorDecoderTable[]
Definition: AArch64Disassembler.cpp:626
GPR64DecoderTable
static const unsigned GPR64DecoderTable[]
Definition: AArch64Disassembler.cpp:415
ZZDecoderTable
static const unsigned ZZDecoderTable[]
Definition: AArch64Disassembler.cpp:530
DecodeMoveImmInstruction
static DecodeStatus DecodeMoveImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:993
DecodeZPR4RegisterClass
static DecodeStatus DecodeZPR4RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:589
DecodeDDDRegisterClass
static DecodeStatus DecodeDDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:748
llvm::MCOperand::createReg
static MCOperand createReg(unsigned Reg)
Definition: MCInst.h:116
DecodeGPR32spRegisterClass
static DecodeStatus DecodeGPR32spRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:480
llvm::MCSubtargetInfo::getFeatureBits
const FeatureBitset & getFeatureBits() const
Definition: MCSubtargetInfo.h:71
DecodeZPR_3bRegisterClass
static DecodeStatus DecodeZPR_3bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:522
DecodeVectorRegisterClass
static DecodeStatus DecodeVectorRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:636
llvm::getTheARM64Target
Target & getTheARM64Target()
Definition: AArch64TargetInfo.cpp:22
FPR128DecoderTable
static const unsigned FPR128DecoderTable[]
Definition: AArch64Disassembler.cpp:302
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
DecodeSImm
static DecodeStatus DecodeSImm(llvm::MCInst &Inst, uint64_t Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1823
llvm::MCOperand::getReg
unsigned getReg() const
Returns the register number.
Definition: MCInst.h:65
llvm::MCContext
Context object for machine code objects.
Definition: MCContext.h:63
DecodeZPR3RegisterClass
static DecodeStatus DecodeZPR3RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:565
llvm::MCDisassembler::STI
const MCSubtargetInfo & STI
Definition: MCDisassembler.h:88
DecodeQQQQRegisterClass
static DecodeStatus DecodeQQQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:704
llvm::X86Disassembler::decodeInstruction
int decodeInstruction(InternalInstruction *insn, byteReader_t reader, const void *readerArg, dlog_t logger, void *loggerArg, const void *miiArg, uint64_t startLoc, DisassemblerMode mode)
Decode one instruction and store the decoding results in a buffer provided by the consumer...
Definition: X86DisassemblerDecoder.cpp:1899
DecodeGPRSeqPairsClassRegisterClass
static DecodeStatus DecodeGPRSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegClassID, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1773
LLVMInitializeAArch64Disassembler
void LLVMInitializeAArch64Disassembler()
Definition: AArch64Disassembler.cpp:286
FPR8DecoderTable
static const unsigned FPR8DecoderTable[]
Definition: AArch64Disassembler.cpp:394
PPRDecoderTable
static const unsigned PPRDecoderTable[]
Definition: AArch64Disassembler.cpp:599
DecodeFixedPointScaleImm32
static DecodeStatus DecodeFixedPointScaleImm32(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:781
DecodeLoadAllocTagArrayInstruction
static DecodeStatus DecodeLoadAllocTagArrayInstruction(MCInst &Inst, uint32_t insn, uint64_t address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1856
DecodeZPR_4bRegisterClass
static DecodeStatus DecodeZPR_4bRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:514
llvm::MCInst
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:161
DecodeVecShiftL32Imm
static DecodeStatus DecodeVecShiftL32Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:916
DecodeVecShiftR64ImmNarrow
static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:878
QQQQDecoderTable
static const unsigned QQQQDecoderTable[]
Definition: AArch64Disassembler.cpp:690
FPR16DecoderTable
static const unsigned FPR16DecoderTable[]
Definition: AArch64Disassembler.cpp:373
llvm::MCSymbolizer
Symbolize and annotate disassembled instructions.
Definition: MCSymbolizer.h:39
llvm::ArrayRef::size
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:149
GPR32DecoderTable
static const unsigned GPR32DecoderTable[]
Definition: AArch64Disassembler.cpp:459
FPR64DecoderTable
static const unsigned FPR64DecoderTable[]
Definition: AArch64Disassembler.cpp:331
DecodeUnsignedLdStInstruction
static DecodeStatus DecodeUnsignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1026
DecodePCRelLabel19
static DecodeStatus DecodePCRelLabel19(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:797
DecodeMRSSystemRegister
static DecodeStatus DecodeMRSSystemRegister(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:820
DecodeZPR2RegisterClass
static DecodeStatus DecodeZPR2RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:541
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:136
llvm::Triple
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
DecodeTestAndBranch
static DecodeStatus DecodeTestAndBranch(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1749
DecodeVecShiftRImm
static DecodeStatus DecodeVecShiftRImm(MCInst &Inst, unsigned Imm, unsigned Add)
Definition: AArch64Disassembler.cpp:861
ZPRDecoderTable
static const unsigned ZPRDecoderTable[]
Definition: AArch64Disassembler.cpp:492
DDDDecoderTable
static const unsigned DDDDecoderTable[]
Definition: AArch64Disassembler.cpp:734
uint32_t
DecodeVecShiftL8Imm
static DecodeStatus DecodeVecShiftL8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:926
llvm::AArch64Disassembler::getInstruction
MCDisassembler::DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, ArrayRef< uint8_t > Bytes, uint64_t Address, raw_ostream &VStream, raw_ostream &CStream) const override
Returns the disassembly of a single instruction.
Definition: AArch64Disassembler.cpp:256
DecodeAdrInstruction
static DecodeStatus DecodeAdrInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1647
DecodeVecShiftR32Imm
static DecodeStatus DecodeVecShiftR32Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:884
DecodePPRRegisterClass
static DecodeStatus DecodePPRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:606
DecodeMemExtend
static DecodeStatus DecodeMemExtend(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:813
DDDDDecoderTable
static const unsigned DDDDDecoderTable[]
Definition: AArch64Disassembler.cpp:757
createAArch64ExternalSymbolizer
static MCSymbolizer * createAArch64ExternalSymbolizer(const Triple &TT, LLVMOpInfoCallback GetOpInfo, LLVMSymbolLookupCallback SymbolLookUp, void *DisInfo, MCContext *Ctx, std::unique_ptr< MCRelocationInfo > &&RelInfo)
Definition: AArch64Disassembler.cpp:278
llvm::MCInst::getOperand
const MCOperand & getOperand(unsigned i) const
Definition: MCInst.h:182
QQDecoderTable
static const unsigned QQDecoderTable[]
Definition: AArch64Disassembler.cpp:647
Register
Promote Memory to Register
Definition: Mem2Reg.cpp:110
DecodeGPR32RegisterClass
static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:469
DecodeLogicalImmInstruction
static DecodeStatus DecodeLogicalImmInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1559
DecodeSignedLdStInstruction
static DecodeStatus DecodeSignedLdStInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1087
DecodeFPR16RegisterClass
static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:383
llvm::Target
Target - Wrapper for Target specific information.
Definition: TargetRegistry.h:120
DecodeZPRRegisterClass
static DecodeStatus DecodeZPRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:503
DecodeDDRegisterClass
static DecodeStatus DecodeDDRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:725
DecodeVecShiftR64Imm
static DecodeStatus DecodeVecShiftR64Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:873
DecodeQQQRegisterClass
static DecodeStatus DecodeQQQRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:681
DecodeFPR128_loRegisterClass
static DecodeStatus DecodeFPR128_loRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:323
DecodeThreeAddrSRegInstruction
static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:931
DDDecoderTable
static const unsigned DDDecoderTable[]
Definition: AArch64Disassembler.cpp:714
llvm::MCSubtargetInfo
Generic base class for all target subtargets.
Definition: MCSubtargetInfo.h:36
Size
uint32_t Size
Definition: Profile.cpp:47
ZZZZDecoderTable
static const unsigned ZZZZDecoderTable[]
Definition: AArch64Disassembler.cpp:575
DecodeSVEIncDecImm
static DecodeStatus DecodeSVEIncDecImm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1850
DecodeFixedPointScaleImm64
static DecodeStatus DecodeFixedPointScaleImm64(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:790
DecodeAddSubImmShift
static DecodeStatus DecodeAddSubImmShift(MCInst &Inst, uint32_t insn, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:1666
llvm::AArch64_AM::isValidDecodeLogicalImmediate
static bool isValidDecodeLogicalImmediate(uint64_t val, unsigned regSize)
isValidDecodeLogicalImmediate - Check to see if the logical immediate value in the form "N:immr:imms"...
Definition: AArch64AddressingModes.h:322
llvm::TargetRegistry::RegisterMCSymbolizer
static void RegisterMCSymbolizer(Target &T, Target::MCSymbolizerCtorTy Fn)
RegisterMCSymbolizer - Register an MCSymbolizer implementation for the given target.
Definition: TargetRegistry.h:894
DecodeVecShiftR16ImmNarrow
static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:900
DecodeVecShiftR8Imm
static DecodeStatus DecodeVecShiftR8Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:906
llvm::MCDisassembler::getSubtargetInfo
const MCSubtargetInfo & getSubtargetInfo() const
Definition: MCDisassembler.h:106
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:46
createAArch64Disassembler
static MCDisassembler * createAArch64Disassembler(const Target &T, const MCSubtargetInfo &STI, MCContext &Ctx)
Definition: AArch64Disassembler.cpp:250
MI
IRTranslator LLVM IR MI
Definition: IRTranslator.cpp:89
llvm::MCInst::addOperand
void addOperand(const MCOperand &Op)
Definition: MCInst.h:186
llvm::MCInst::getOpcode
unsigned getOpcode() const
Definition: MCInst.h:174
LLVMSymbolLookupCallback
const 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
llvm::MCOperand::createImm
static MCOperand createImm(int64_t Val)
Definition: MCInst.h:123
DecodeFPR32RegisterClass
static DecodeStatus DecodeFPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:362
DecodeVecShiftR16Imm
static DecodeStatus DecodeVecShiftR16Imm(MCInst &Inst, unsigned Imm, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:895
DecodeWSeqPairsClassRegisterClass
static DecodeStatus DecodeWSeqPairsClassRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Addr, const void *Decoder)
Definition: AArch64Disassembler.cpp:1787
DecodeFPR8RegisterClass
static DecodeStatus DecodeFPR8RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: AArch64Disassembler.cpp:404
Generated on Sun Dec 20 2020 13:56:10 for LLVM by   doxygen 1.8.13