LLVM  8.0.1
MipsDisassembler.cpp
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1 //===- MipsDisassembler.cpp - Disassembler for Mips -----------------------===//
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 // This file is part of the Mips Disassembler.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "MCTargetDesc/MipsMCTargetDesc.h"
15 #include "Mips.h"
16 #include "llvm/ADT/ArrayRef.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
19 #include "llvm/MC/MCFixedLenDisassembler.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/Support/Compiler.h"
24 #include "llvm/Support/Debug.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/MathExtras.h"
27 #include "llvm/Support/TargetRegistry.h"
28 #include "llvm/Support/raw_ostream.h"
29 #include <cassert>
30 #include <cstdint>
31 
32 using namespace llvm;
33 
34 #define DEBUG_TYPE "mips-disassembler"
35 
36 using DecodeStatus = MCDisassembler::DecodeStatus;
37 
38 namespace {
39 
40 class MipsDisassembler : public MCDisassembler {
41  bool IsMicroMips;
42  bool IsBigEndian;
43 
44 public:
45  MipsDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, bool IsBigEndian)
46  : MCDisassembler(STI, Ctx),
47  IsMicroMips(STI.getFeatureBits()[Mips::FeatureMicroMips]),
48  IsBigEndian(IsBigEndian) {}
49 
50  bool hasMips2() const { return STI.getFeatureBits()[Mips::FeatureMips2]; }
51  bool hasMips3() const { return STI.getFeatureBits()[Mips::FeatureMips3]; }
52  bool hasMips32() const { return STI.getFeatureBits()[Mips::FeatureMips32]; }
53 
54  bool hasMips32r6() const {
55  return STI.getFeatureBits()[Mips::FeatureMips32r6];
56  }
57 
58  bool isFP64() const { return STI.getFeatureBits()[Mips::FeatureFP64Bit]; }
59 
60  bool isGP64() const { return STI.getFeatureBits()[Mips::FeatureGP64Bit]; }
61 
62  bool isPTR64() const { return STI.getFeatureBits()[Mips::FeaturePTR64Bit]; }
63 
64  bool hasCnMips() const { return STI.getFeatureBits()[Mips::FeatureCnMips]; }
65 
66  bool hasCOP3() const {
67  // Only present in MIPS-I and MIPS-II
68  return !hasMips32() && !hasMips3();
69  }
70 
71  DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
72  ArrayRef<uint8_t> Bytes, uint64_t Address,
73  raw_ostream &VStream,
74  raw_ostream &CStream) const override;
75 };
76 
77 } // end anonymous namespace
78 
79 // Forward declare these because the autogenerated code will reference them.
80 // Definitions are further down.
81 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst,
82  unsigned RegNo,
83  uint64_t Address,
84  const void *Decoder);
85 
86 static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst &Inst,
87  unsigned RegNo,
88  uint64_t Address,
89  const void *Decoder);
90 
91 static DecodeStatus DecodeGPRMM16RegisterClass(MCInst &Inst,
92  unsigned RegNo,
93  uint64_t Address,
94  const void *Decoder);
95 
96 static DecodeStatus DecodeGPRMM16ZeroRegisterClass(MCInst &Inst,
97  unsigned RegNo,
98  uint64_t Address,
99  const void *Decoder);
100 
101 static DecodeStatus DecodeGPRMM16MovePRegisterClass(MCInst &Inst,
102  unsigned RegNo,
103  uint64_t Address,
104  const void *Decoder);
105 
106 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst,
107  unsigned RegNo,
108  uint64_t Address,
109  const void *Decoder);
110 
111 static DecodeStatus DecodePtrRegisterClass(MCInst &Inst,
112  unsigned Insn,
113  uint64_t Address,
114  const void *Decoder);
115 
116 static DecodeStatus DecodeDSPRRegisterClass(MCInst &Inst,
117  unsigned RegNo,
118  uint64_t Address,
119  const void *Decoder);
120 
121 static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst,
122  unsigned RegNo,
123  uint64_t Address,
124  const void *Decoder);
125 
126 static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst,
127  unsigned RegNo,
128  uint64_t Address,
129  const void *Decoder);
130 
131 static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst,
132  unsigned RegNo,
133  uint64_t Address,
134  const void *Decoder);
135 
136 static DecodeStatus DecodeFCCRegisterClass(MCInst &Inst,
137  unsigned RegNo,
138  uint64_t Address,
139  const void *Decoder);
140 
141 static DecodeStatus DecodeFGRCCRegisterClass(MCInst &Inst, unsigned RegNo,
142  uint64_t Address,
143  const void *Decoder);
144 
145 static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst,
146  unsigned Insn,
147  uint64_t Address,
148  const void *Decoder);
149 
150 static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst,
151  unsigned RegNo,
152  uint64_t Address,
153  const void *Decoder);
154 
155 static DecodeStatus DecodeACC64DSPRegisterClass(MCInst &Inst,
156  unsigned RegNo,
157  uint64_t Address,
158  const void *Decoder);
159 
160 static DecodeStatus DecodeHI32DSPRegisterClass(MCInst &Inst,
161  unsigned RegNo,
162  uint64_t Address,
163  const void *Decoder);
164 
165 static DecodeStatus DecodeLO32DSPRegisterClass(MCInst &Inst,
166  unsigned RegNo,
167  uint64_t Address,
168  const void *Decoder);
169 
170 static DecodeStatus DecodeMSA128BRegisterClass(MCInst &Inst,
171  unsigned RegNo,
172  uint64_t Address,
173  const void *Decoder);
174 
175 static DecodeStatus DecodeMSA128HRegisterClass(MCInst &Inst,
176  unsigned RegNo,
177  uint64_t Address,
178  const void *Decoder);
179 
180 static DecodeStatus DecodeMSA128WRegisterClass(MCInst &Inst,
181  unsigned RegNo,
182  uint64_t Address,
183  const void *Decoder);
184 
185 static DecodeStatus DecodeMSA128DRegisterClass(MCInst &Inst,
186  unsigned RegNo,
187  uint64_t Address,
188  const void *Decoder);
189 
190 static DecodeStatus DecodeMSACtrlRegisterClass(MCInst &Inst,
191  unsigned RegNo,
192  uint64_t Address,
193  const void *Decoder);
194 
195 static DecodeStatus DecodeCOP0RegisterClass(MCInst &Inst,
196  unsigned RegNo,
197  uint64_t Address,
198  const void *Decoder);
199 
200 static DecodeStatus DecodeCOP2RegisterClass(MCInst &Inst,
201  unsigned RegNo,
202  uint64_t Address,
203  const void *Decoder);
204 
205 static DecodeStatus DecodeBranchTarget(MCInst &Inst,
206  unsigned Offset,
207  uint64_t Address,
208  const void *Decoder);
209 
210 static DecodeStatus DecodeBranchTarget1SImm16(MCInst &Inst,
211  unsigned Offset,
212  uint64_t Address,
213  const void *Decoder);
214 
215 static DecodeStatus DecodeJumpTarget(MCInst &Inst,
216  unsigned Insn,
217  uint64_t Address,
218  const void *Decoder);
219 
220 static DecodeStatus DecodeBranchTarget21(MCInst &Inst,
221  unsigned Offset,
222  uint64_t Address,
223  const void *Decoder);
224 
225 static DecodeStatus DecodeBranchTarget21MM(MCInst &Inst,
226  unsigned Offset,
227  uint64_t Address,
228  const void *Decoder);
229 
230 static DecodeStatus DecodeBranchTarget26(MCInst &Inst,
231  unsigned Offset,
232  uint64_t Address,
233  const void *Decoder);
234 
235 // DecodeBranchTarget7MM - Decode microMIPS branch offset, which is
236 // shifted left by 1 bit.
237 static DecodeStatus DecodeBranchTarget7MM(MCInst &Inst,
238  unsigned Offset,
239  uint64_t Address,
240  const void *Decoder);
241 
242 // DecodeBranchTarget10MM - Decode microMIPS branch offset, which is
243 // shifted left by 1 bit.
244 static DecodeStatus DecodeBranchTarget10MM(MCInst &Inst,
245  unsigned Offset,
246  uint64_t Address,
247  const void *Decoder);
248 
249 // DecodeBranchTargetMM - Decode microMIPS branch offset, which is
250 // shifted left by 1 bit.
251 static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
252  unsigned Offset,
253  uint64_t Address,
254  const void *Decoder);
255 
256 // DecodeBranchTarget26MM - Decode microMIPS branch offset, which is
257 // shifted left by 1 bit.
258 static DecodeStatus DecodeBranchTarget26MM(MCInst &Inst,
259  unsigned Offset,
260  uint64_t Address,
261  const void *Decoder);
262 
263 // DecodeJumpTargetMM - Decode microMIPS jump target, which is
264 // shifted left by 1 bit.
265 static DecodeStatus DecodeJumpTargetMM(MCInst &Inst,
266  unsigned Insn,
267  uint64_t Address,
268  const void *Decoder);
269 
270 static DecodeStatus DecodeMem(MCInst &Inst,
271  unsigned Insn,
272  uint64_t Address,
273  const void *Decoder);
274 
275 static DecodeStatus DecodeMemEVA(MCInst &Inst,
276  unsigned Insn,
277  uint64_t Address,
278  const void *Decoder);
279 
280 static DecodeStatus DecodeLoadByte15(MCInst &Inst,
281  unsigned Insn,
282  uint64_t Address,
283  const void *Decoder);
284 
285 static DecodeStatus DecodeCacheOp(MCInst &Inst, unsigned Insn, uint64_t Address,
286  const void *Decoder);
287 
288 static DecodeStatus DecodeCacheeOp_CacheOpR6(MCInst &Inst,
289  unsigned Insn,
290  uint64_t Address,
291  const void *Decoder);
292 
293 static DecodeStatus DecodeCacheOpMM(MCInst &Inst,
294  unsigned Insn,
295  uint64_t Address,
296  const void *Decoder);
297 
298 static DecodeStatus DecodePrefeOpMM(MCInst &Inst,
299  unsigned Insn,
300  uint64_t Address,
301  const void *Decoder);
302 
303 static DecodeStatus DecodeSyncI(MCInst &Inst,
304  unsigned Insn,
305  uint64_t Address,
306  const void *Decoder);
307 
308 static DecodeStatus DecodeSyncI_MM(MCInst &Inst,
309  unsigned Insn,
310  uint64_t Address,
311  const void *Decoder);
312 
313 static DecodeStatus DecodeSynciR6(MCInst &Inst,
314  unsigned Insn,
315  uint64_t Address,
316  const void *Decoder);
317 
318 static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn,
319  uint64_t Address, const void *Decoder);
320 
321 static DecodeStatus DecodeMemMMImm4(MCInst &Inst,
322  unsigned Insn,
323  uint64_t Address,
324  const void *Decoder);
325 
326 static DecodeStatus DecodeMemMMSPImm5Lsl2(MCInst &Inst,
327  unsigned Insn,
328  uint64_t Address,
329  const void *Decoder);
330 
331 static DecodeStatus DecodeMemMMGPImm7Lsl2(MCInst &Inst,
332  unsigned Insn,
333  uint64_t Address,
334  const void *Decoder);
335 
336 static DecodeStatus DecodeMemMMReglistImm4Lsl2(MCInst &Inst,
337  unsigned Insn,
338  uint64_t Address,
339  const void *Decoder);
340 
341 static DecodeStatus DecodeMemMMImm9(MCInst &Inst,
342  unsigned Insn,
343  uint64_t Address,
344  const void *Decoder);
345 
346 static DecodeStatus DecodeMemMMImm12(MCInst &Inst,
347  unsigned Insn,
348  uint64_t Address,
349  const void *Decoder);
350 
351 static DecodeStatus DecodeMemMMImm16(MCInst &Inst,
352  unsigned Insn,
353  uint64_t Address,
354  const void *Decoder);
355 
356 static DecodeStatus DecodeFMem(MCInst &Inst, unsigned Insn,
357  uint64_t Address,
358  const void *Decoder);
359 
360 static DecodeStatus DecodeFMemMMR2(MCInst &Inst, unsigned Insn,
361  uint64_t Address,
362  const void *Decoder);
363 
364 static DecodeStatus DecodeFMem2(MCInst &Inst, unsigned Insn, uint64_t Address,
365  const void *Decoder);
366 
367 static DecodeStatus DecodeFMem3(MCInst &Inst, unsigned Insn, uint64_t Address,
368  const void *Decoder);
369 
370 static DecodeStatus DecodeFMemCop2R6(MCInst &Inst, unsigned Insn,
371  uint64_t Address, const void *Decoder);
372 
373 static DecodeStatus DecodeFMemCop2MMR6(MCInst &Inst, unsigned Insn,
374  uint64_t Address,
375  const void *Decoder);
376 
377 static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst,
378  unsigned Insn,
379  uint64_t Address,
380  const void *Decoder);
381 
382 static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
383  unsigned Value,
384  uint64_t Address,
385  const void *Decoder);
386 
387 static DecodeStatus DecodeLi16Imm(MCInst &Inst,
388  unsigned Value,
389  uint64_t Address,
390  const void *Decoder);
391 
392 static DecodeStatus DecodePOOL16BEncodedField(MCInst &Inst,
393  unsigned Value,
394  uint64_t Address,
395  const void *Decoder);
396 
397 template <unsigned Bits, int Offset, int Scale>
398 static DecodeStatus DecodeUImmWithOffsetAndScale(MCInst &Inst, unsigned Value,
399  uint64_t Address,
400  const void *Decoder);
401 
402 template <unsigned Bits, int Offset>
403 static DecodeStatus DecodeUImmWithOffset(MCInst &Inst, unsigned Value,
404  uint64_t Address,
405  const void *Decoder) {
406  return DecodeUImmWithOffsetAndScale<Bits, Offset, 1>(Inst, Value, Address,
407  Decoder);
408 }
409 
410 template <unsigned Bits, int Offset = 0, int ScaleBy = 1>
411 static DecodeStatus DecodeSImmWithOffsetAndScale(MCInst &Inst, unsigned Value,
412  uint64_t Address,
413  const void *Decoder);
414 
415 static DecodeStatus DecodeInsSize(MCInst &Inst,
416  unsigned Insn,
417  uint64_t Address,
418  const void *Decoder);
419 
420 static DecodeStatus DecodeSimm19Lsl2(MCInst &Inst, unsigned Insn,
421  uint64_t Address, const void *Decoder);
422 
423 static DecodeStatus DecodeSimm18Lsl3(MCInst &Inst, unsigned Insn,
424  uint64_t Address, const void *Decoder);
425 
426 static DecodeStatus DecodeSimm9SP(MCInst &Inst, unsigned Insn,
427  uint64_t Address, const void *Decoder);
428 
429 static DecodeStatus DecodeANDI16Imm(MCInst &Inst, unsigned Insn,
430  uint64_t Address, const void *Decoder);
431 
432 static DecodeStatus DecodeSimm23Lsl2(MCInst &Inst, unsigned Insn,
433  uint64_t Address, const void *Decoder);
434 
435 /// INSVE_[BHWD] have an implicit operand that the generated decoder doesn't
436 /// handle.
437 template <typename InsnType>
438 static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address,
439  const void *Decoder);
440 
441 template <typename InsnType>
442 static DecodeStatus DecodeDAHIDATIMMR6(MCInst &MI, InsnType insn, uint64_t Address,
443  const void *Decoder);
444 
445 template <typename InsnType>
446 static DecodeStatus DecodeDAHIDATI(MCInst &MI, InsnType insn, uint64_t Address,
447  const void *Decoder);
448 
449 template <typename InsnType>
450 static DecodeStatus DecodeDAHIDATIMMR6(MCInst &MI, InsnType insn, uint64_t Address,
451  const void *Decoder);
452 
453 template <typename InsnType>
454 static DecodeStatus DecodeDAHIDATI(MCInst &MI, InsnType insn, uint64_t Address,
455  const void *Decoder);
456 
457 template <typename InsnType>
458 static DecodeStatus
459 DecodeAddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
460  const void *Decoder);
461 
462 template <typename InsnType>
463 static DecodeStatus
464 DecodePOP35GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
465  const void *Decoder);
466 
467 template <typename InsnType>
468 static DecodeStatus
469 DecodeDaddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
470  const void *Decoder);
471 
472 template <typename InsnType>
473 static DecodeStatus
474 DecodePOP37GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
475  const void *Decoder);
476 
477 template <typename InsnType>
478 static DecodeStatus
479 DecodePOP65GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
480  const void *Decoder);
481 
482 template <typename InsnType>
483 static DecodeStatus
484 DecodePOP75GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
485  const void *Decoder);
486 
487 template <typename InsnType>
488 static DecodeStatus
489 DecodeBlezlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
490  const void *Decoder);
491 
492 template <typename InsnType>
493 static DecodeStatus
494 DecodeBgtzlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
495  const void *Decoder);
496 
497 template <typename InsnType>
498 static DecodeStatus
499 DecodeBgtzGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
500  const void *Decoder);
501 
502 template <typename InsnType>
503 static DecodeStatus
504 DecodeBlezGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
505  const void *Decoder);
506 
507 template <typename InsnType>
508 static DecodeStatus
509 DecodeBgtzGroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
510  const void *Decoder);
511 
512 template <typename InsnType>
513 static DecodeStatus
514 DecodeBlezGroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
515  const void *Decoder);
516 
517 template <typename InsnType>
518 static DecodeStatus DecodeDINS(MCInst &MI, InsnType Insn, uint64_t Address,
519  const void *Decoder);
520 
521 template <typename InsnType>
522 static DecodeStatus DecodeDEXT(MCInst &MI, InsnType Insn, uint64_t Address,
523  const void *Decoder);
524 
525 template <typename InsnType>
526 static DecodeStatus DecodeCRC(MCInst &MI, InsnType Insn, uint64_t Address,
527  const void *Decoder);
528 
529 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Insn,
530  uint64_t Address,
531  const void *Decoder);
532 
533 static DecodeStatus DecodeRegListOperand16(MCInst &Inst, unsigned Insn,
534  uint64_t Address,
535  const void *Decoder);
536 
537 static DecodeStatus DecodeMovePRegPair(MCInst &Inst, unsigned RegPair,
538  uint64_t Address,
539  const void *Decoder);
540 
541 static DecodeStatus DecodeMovePOperands(MCInst &Inst, unsigned Insn,
542  uint64_t Address, const void *Decoder);
543 
544 namespace llvm {
545 
546 Target &getTheMipselTarget();
547 Target &getTheMipsTarget();
548 Target &getTheMips64Target();
549 Target &getTheMips64elTarget();
550 
551 } // end namespace llvm
552 
553 static MCDisassembler *createMipsDisassembler(
554  const Target &T,
555  const MCSubtargetInfo &STI,
556  MCContext &Ctx) {
557  return new MipsDisassembler(STI, Ctx, true);
558 }
559 
560 static MCDisassembler *createMipselDisassembler(
561  const Target &T,
562  const MCSubtargetInfo &STI,
563  MCContext &Ctx) {
564  return new MipsDisassembler(STI, Ctx, false);
565 }
566 
567 extern "C" void LLVMInitializeMipsDisassembler() {
568  // Register the disassembler.
569  TargetRegistry::RegisterMCDisassembler(getTheMipsTarget(),
570  createMipsDisassembler);
571  TargetRegistry::RegisterMCDisassembler(getTheMipselTarget(),
572  createMipselDisassembler);
573  TargetRegistry::RegisterMCDisassembler(getTheMips64Target(),
574  createMipsDisassembler);
575  TargetRegistry::RegisterMCDisassembler(getTheMips64elTarget(),
576  createMipselDisassembler);
577 }
578 
579 #include "MipsGenDisassemblerTables.inc"
580 
581 static unsigned getReg(const void *D, unsigned RC, unsigned RegNo) {
582  const MipsDisassembler *Dis = static_cast<const MipsDisassembler*>(D);
583  const MCRegisterInfo *RegInfo = Dis->getContext().getRegisterInfo();
584  return *(RegInfo->getRegClass(RC).begin() + RegNo);
585 }
586 
587 template <typename InsnType>
588 static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address,
589  const void *Decoder) {
590  using DecodeFN = DecodeStatus (*)(MCInst &, unsigned, uint64_t, const void *);
591 
592  // The size of the n field depends on the element size
593  // The register class also depends on this.
594  InsnType tmp = fieldFromInstruction(insn, 17, 5);
595  unsigned NSize = 0;
596  DecodeFN RegDecoder = nullptr;
597  if ((tmp & 0x18) == 0x00) { // INSVE_B
598  NSize = 4;
599  RegDecoder = DecodeMSA128BRegisterClass;
600  } else if ((tmp & 0x1c) == 0x10) { // INSVE_H
601  NSize = 3;
602  RegDecoder = DecodeMSA128HRegisterClass;
603  } else if ((tmp & 0x1e) == 0x18) { // INSVE_W
604  NSize = 2;
605  RegDecoder = DecodeMSA128WRegisterClass;
606  } else if ((tmp & 0x1f) == 0x1c) { // INSVE_D
607  NSize = 1;
608  RegDecoder = DecodeMSA128DRegisterClass;
609  } else
610  llvm_unreachable("Invalid encoding");
611 
612  assert(NSize != 0 && RegDecoder != nullptr);
613 
614  // $wd
615  tmp = fieldFromInstruction(insn, 6, 5);
616  if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
617  return MCDisassembler::Fail;
618  // $wd_in
619  if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
620  return MCDisassembler::Fail;
621  // $n
622  tmp = fieldFromInstruction(insn, 16, NSize);
623  MI.addOperand(MCOperand::createImm(tmp));
624  // $ws
625  tmp = fieldFromInstruction(insn, 11, 5);
626  if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
627  return MCDisassembler::Fail;
628  // $n2
629  MI.addOperand(MCOperand::createImm(0));
630 
631  return MCDisassembler::Success;
632 }
633 
634 template <typename InsnType>
635 static DecodeStatus DecodeDAHIDATIMMR6(MCInst &MI, InsnType insn, uint64_t Address,
636  const void *Decoder) {
637  InsnType Rs = fieldFromInstruction(insn, 16, 5);
638  InsnType Imm = fieldFromInstruction(insn, 0, 16);
639  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID,
640  Rs)));
641  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID,
642  Rs)));
643  MI.addOperand(MCOperand::createImm(Imm));
644 
645  return MCDisassembler::Success;
646 }
647 
648 template <typename InsnType>
649 static DecodeStatus DecodeDAHIDATI(MCInst &MI, InsnType insn, uint64_t Address,
650  const void *Decoder) {
651  InsnType Rs = fieldFromInstruction(insn, 21, 5);
652  InsnType Imm = fieldFromInstruction(insn, 0, 16);
653  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID,
654  Rs)));
655  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID,
656  Rs)));
657  MI.addOperand(MCOperand::createImm(Imm));
658 
659  return MCDisassembler::Success;
660 }
661 
662 template <typename InsnType>
663 static DecodeStatus DecodeAddiGroupBranch(MCInst &MI, InsnType insn,
664  uint64_t Address,
665  const void *Decoder) {
666  // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
667  // (otherwise we would have matched the ADDI instruction from the earlier
668  // ISA's instead).
669  //
670  // We have:
671  // 0b001000 sssss ttttt iiiiiiiiiiiiiiii
672  // BOVC if rs >= rt
673  // BEQZALC if rs == 0 && rt != 0
674  // BEQC if rs < rt && rs != 0
675 
676  InsnType Rs = fieldFromInstruction(insn, 21, 5);
677  InsnType Rt = fieldFromInstruction(insn, 16, 5);
678  int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
679  bool HasRs = false;
680 
681  if (Rs >= Rt) {
682  MI.setOpcode(Mips::BOVC);
683  HasRs = true;
684  } else if (Rs != 0 && Rs < Rt) {
685  MI.setOpcode(Mips::BEQC);
686  HasRs = true;
687  } else
688  MI.setOpcode(Mips::BEQZALC);
689 
690  if (HasRs)
691  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
692  Rs)));
693 
694  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
695  Rt)));
696  MI.addOperand(MCOperand::createImm(Imm));
697 
698  return MCDisassembler::Success;
699 }
700 
701 template <typename InsnType>
702 static DecodeStatus DecodePOP35GroupBranchMMR6(MCInst &MI, InsnType insn,
703  uint64_t Address,
704  const void *Decoder) {
705  InsnType Rt = fieldFromInstruction(insn, 21, 5);
706  InsnType Rs = fieldFromInstruction(insn, 16, 5);
707  int64_t Imm = 0;
708 
709  if (Rs >= Rt) {
710  MI.setOpcode(Mips::BOVC_MMR6);
711  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
712  Rt)));
713  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
714  Rs)));
715  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
716  } else if (Rs != 0 && Rs < Rt) {
717  MI.setOpcode(Mips::BEQC_MMR6);
718  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
719  Rs)));
720  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
721  Rt)));
722  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
723  } else {
724  MI.setOpcode(Mips::BEQZALC_MMR6);
725  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
726  Rt)));
727  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
728  }
729 
730  MI.addOperand(MCOperand::createImm(Imm));
731 
732  return MCDisassembler::Success;
733 }
734 
735 template <typename InsnType>
736 static DecodeStatus DecodeDaddiGroupBranch(MCInst &MI, InsnType insn,
737  uint64_t Address,
738  const void *Decoder) {
739  // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
740  // (otherwise we would have matched the ADDI instruction from the earlier
741  // ISA's instead).
742  //
743  // We have:
744  // 0b011000 sssss ttttt iiiiiiiiiiiiiiii
745  // BNVC if rs >= rt
746  // BNEZALC if rs == 0 && rt != 0
747  // BNEC if rs < rt && rs != 0
748 
749  InsnType Rs = fieldFromInstruction(insn, 21, 5);
750  InsnType Rt = fieldFromInstruction(insn, 16, 5);
751  int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
752  bool HasRs = false;
753 
754  if (Rs >= Rt) {
755  MI.setOpcode(Mips::BNVC);
756  HasRs = true;
757  } else if (Rs != 0 && Rs < Rt) {
758  MI.setOpcode(Mips::BNEC);
759  HasRs = true;
760  } else
761  MI.setOpcode(Mips::BNEZALC);
762 
763  if (HasRs)
764  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
765  Rs)));
766 
767  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
768  Rt)));
769  MI.addOperand(MCOperand::createImm(Imm));
770 
771  return MCDisassembler::Success;
772 }
773 
774 template <typename InsnType>
775 static DecodeStatus DecodePOP37GroupBranchMMR6(MCInst &MI, InsnType insn,
776  uint64_t Address,
777  const void *Decoder) {
778  InsnType Rt = fieldFromInstruction(insn, 21, 5);
779  InsnType Rs = fieldFromInstruction(insn, 16, 5);
780  int64_t Imm = 0;
781 
782  if (Rs >= Rt) {
783  MI.setOpcode(Mips::BNVC_MMR6);
784  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
785  Rt)));
786  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
787  Rs)));
788  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
789  } else if (Rs != 0 && Rs < Rt) {
790  MI.setOpcode(Mips::BNEC_MMR6);
791  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
792  Rs)));
793  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
794  Rt)));
795  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
796  } else {
797  MI.setOpcode(Mips::BNEZALC_MMR6);
798  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
799  Rt)));
800  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
801  }
802 
803  MI.addOperand(MCOperand::createImm(Imm));
804 
805  return MCDisassembler::Success;
806 }
807 
808 template <typename InsnType>
809 static DecodeStatus DecodePOP65GroupBranchMMR6(MCInst &MI, InsnType insn,
810  uint64_t Address,
811  const void *Decoder) {
812  // We have:
813  // 0b110101 ttttt sssss iiiiiiiiiiiiiiii
814  // Invalid if rt == 0
815  // BGTZC_MMR6 if rs == 0 && rt != 0
816  // BLTZC_MMR6 if rs == rt && rt != 0
817  // BLTC_MMR6 if rs != rt && rs != 0 && rt != 0
818 
819  InsnType Rt = fieldFromInstruction(insn, 21, 5);
820  InsnType Rs = fieldFromInstruction(insn, 16, 5);
821  int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
822  bool HasRs = false;
823 
824  if (Rt == 0)
825  return MCDisassembler::Fail;
826  else if (Rs == 0)
827  MI.setOpcode(Mips::BGTZC_MMR6);
828  else if (Rs == Rt)
829  MI.setOpcode(Mips::BLTZC_MMR6);
830  else {
831  MI.setOpcode(Mips::BLTC_MMR6);
832  HasRs = true;
833  }
834 
835  if (HasRs)
836  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
837  Rs)));
838 
839  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
840  Rt)));
841 
842  MI.addOperand(MCOperand::createImm(Imm));
843 
844  return MCDisassembler::Success;
845 }
846 
847 template <typename InsnType>
848 static DecodeStatus DecodePOP75GroupBranchMMR6(MCInst &MI, InsnType insn,
849  uint64_t Address,
850  const void *Decoder) {
851  // We have:
852  // 0b111101 ttttt sssss iiiiiiiiiiiiiiii
853  // Invalid if rt == 0
854  // BLEZC_MMR6 if rs == 0 && rt != 0
855  // BGEZC_MMR6 if rs == rt && rt != 0
856  // BGEC_MMR6 if rs != rt && rs != 0 && rt != 0
857 
858  InsnType Rt = fieldFromInstruction(insn, 21, 5);
859  InsnType Rs = fieldFromInstruction(insn, 16, 5);
860  int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
861  bool HasRs = false;
862 
863  if (Rt == 0)
864  return MCDisassembler::Fail;
865  else if (Rs == 0)
866  MI.setOpcode(Mips::BLEZC_MMR6);
867  else if (Rs == Rt)
868  MI.setOpcode(Mips::BGEZC_MMR6);
869  else {
870  HasRs = true;
871  MI.setOpcode(Mips::BGEC_MMR6);
872  }
873 
874  if (HasRs)
875  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
876  Rs)));
877 
878  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
879  Rt)));
880 
881  MI.addOperand(MCOperand::createImm(Imm));
882 
883  return MCDisassembler::Success;
884 }
885 
886 template <typename InsnType>
887 static DecodeStatus DecodeBlezlGroupBranch(MCInst &MI, InsnType insn,
888  uint64_t Address,
889  const void *Decoder) {
890  // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
891  // (otherwise we would have matched the BLEZL instruction from the earlier
892  // ISA's instead).
893  //
894  // We have:
895  // 0b010110 sssss ttttt iiiiiiiiiiiiiiii
896  // Invalid if rs == 0
897  // BLEZC if rs == 0 && rt != 0
898  // BGEZC if rs == rt && rt != 0
899  // BGEC if rs != rt && rs != 0 && rt != 0
900 
901  InsnType Rs = fieldFromInstruction(insn, 21, 5);
902  InsnType Rt = fieldFromInstruction(insn, 16, 5);
903  int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
904  bool HasRs = false;
905 
906  if (Rt == 0)
907  return MCDisassembler::Fail;
908  else if (Rs == 0)
909  MI.setOpcode(Mips::BLEZC);
910  else if (Rs == Rt)
911  MI.setOpcode(Mips::BGEZC);
912  else {
913  HasRs = true;
914  MI.setOpcode(Mips::BGEC);
915  }
916 
917  if (HasRs)
918  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
919  Rs)));
920 
921  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
922  Rt)));
923 
924  MI.addOperand(MCOperand::createImm(Imm));
925 
926  return MCDisassembler::Success;
927 }
928 
929 template <typename InsnType>
930 static DecodeStatus DecodeBgtzlGroupBranch(MCInst &MI, InsnType insn,
931  uint64_t Address,
932  const void *Decoder) {
933  // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
934  // (otherwise we would have matched the BGTZL instruction from the earlier
935  // ISA's instead).
936  //
937  // We have:
938  // 0b010111 sssss ttttt iiiiiiiiiiiiiiii
939  // Invalid if rs == 0
940  // BGTZC if rs == 0 && rt != 0
941  // BLTZC if rs == rt && rt != 0
942  // BLTC if rs != rt && rs != 0 && rt != 0
943 
944  bool HasRs = false;
945 
946  InsnType Rs = fieldFromInstruction(insn, 21, 5);
947  InsnType Rt = fieldFromInstruction(insn, 16, 5);
948  int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
949 
950  if (Rt == 0)
951  return MCDisassembler::Fail;
952  else if (Rs == 0)
953  MI.setOpcode(Mips::BGTZC);
954  else if (Rs == Rt)
955  MI.setOpcode(Mips::BLTZC);
956  else {
957  MI.setOpcode(Mips::BLTC);
958  HasRs = true;
959  }
960 
961  if (HasRs)
962  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
963  Rs)));
964 
965  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
966  Rt)));
967 
968  MI.addOperand(MCOperand::createImm(Imm));
969 
970  return MCDisassembler::Success;
971 }
972 
973 template <typename InsnType>
974 static DecodeStatus DecodeBgtzGroupBranch(MCInst &MI, InsnType insn,
975  uint64_t Address,
976  const void *Decoder) {
977  // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
978  // (otherwise we would have matched the BGTZ instruction from the earlier
979  // ISA's instead).
980  //
981  // We have:
982  // 0b000111 sssss ttttt iiiiiiiiiiiiiiii
983  // BGTZ if rt == 0
984  // BGTZALC if rs == 0 && rt != 0
985  // BLTZALC if rs != 0 && rs == rt
986  // BLTUC if rs != 0 && rs != rt
987 
988  InsnType Rs = fieldFromInstruction(insn, 21, 5);
989  InsnType Rt = fieldFromInstruction(insn, 16, 5);
990  int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
991  bool HasRs = false;
992  bool HasRt = false;
993 
994  if (Rt == 0) {
995  MI.setOpcode(Mips::BGTZ);
996  HasRs = true;
997  } else if (Rs == 0) {
998  MI.setOpcode(Mips::BGTZALC);
999  HasRt = true;
1000  } else if (Rs == Rt) {
1001  MI.setOpcode(Mips::BLTZALC);
1002  HasRs = true;
1003  } else {
1004  MI.setOpcode(Mips::BLTUC);
1005  HasRs = true;
1006  HasRt = true;
1007  }
1008 
1009  if (HasRs)
1010  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1011  Rs)));
1012 
1013  if (HasRt)
1014  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1015  Rt)));
1016 
1017  MI.addOperand(MCOperand::createImm(Imm));
1018 
1019  return MCDisassembler::Success;
1020 }
1021 
1022 template <typename InsnType>
1023 static DecodeStatus DecodeBlezGroupBranch(MCInst &MI, InsnType insn,
1024  uint64_t Address,
1025  const void *Decoder) {
1026  // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
1027  // (otherwise we would have matched the BLEZL instruction from the earlier
1028  // ISA's instead).
1029  //
1030  // We have:
1031  // 0b000110 sssss ttttt iiiiiiiiiiiiiiii
1032  // Invalid if rs == 0
1033  // BLEZALC if rs == 0 && rt != 0
1034  // BGEZALC if rs == rt && rt != 0
1035  // BGEUC if rs != rt && rs != 0 && rt != 0
1036 
1037  InsnType Rs = fieldFromInstruction(insn, 21, 5);
1038  InsnType Rt = fieldFromInstruction(insn, 16, 5);
1039  int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
1040  bool HasRs = false;
1041 
1042  if (Rt == 0)
1043  return MCDisassembler::Fail;
1044  else if (Rs == 0)
1045  MI.setOpcode(Mips::BLEZALC);
1046  else if (Rs == Rt)
1047  MI.setOpcode(Mips::BGEZALC);
1048  else {
1049  HasRs = true;
1050  MI.setOpcode(Mips::BGEUC);
1051  }
1052 
1053  if (HasRs)
1054  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1055  Rs)));
1056  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1057  Rt)));
1058 
1059  MI.addOperand(MCOperand::createImm(Imm));
1060 
1061  return MCDisassembler::Success;
1062 }
1063 
1064 // Override the generated disassembler to produce DEXT all the time. This is
1065 // for feature / behaviour parity with binutils.
1066 template <typename InsnType>
1067 static DecodeStatus DecodeDEXT(MCInst &MI, InsnType Insn, uint64_t Address,
1068  const void *Decoder) {
1069  unsigned Msbd = fieldFromInstruction(Insn, 11, 5);
1070  unsigned Lsb = fieldFromInstruction(Insn, 6, 5);
1071  unsigned Size = 0;
1072  unsigned Pos = 0;
1073 
1074  switch (MI.getOpcode()) {
1075  case Mips::DEXT:
1076  Pos = Lsb;
1077  Size = Msbd + 1;
1078  break;
1079  case Mips::DEXTM:
1080  Pos = Lsb;
1081  Size = Msbd + 1 + 32;
1082  break;
1083  case Mips::DEXTU:
1084  Pos = Lsb + 32;
1085  Size = Msbd + 1;
1086  break;
1087  default:
1088  llvm_unreachable("Unknown DEXT instruction!");
1089  }
1090 
1091  MI.setOpcode(Mips::DEXT);
1092 
1093  InsnType Rs = fieldFromInstruction(Insn, 21, 5);
1094  InsnType Rt = fieldFromInstruction(Insn, 16, 5);
1095 
1096  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID, Rt)));
1097  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID, Rs)));
1098  MI.addOperand(MCOperand::createImm(Pos));
1099  MI.addOperand(MCOperand::createImm(Size));
1100 
1101  return MCDisassembler::Success;
1102 }
1103 
1104 // Override the generated disassembler to produce DINS all the time. This is
1105 // for feature / behaviour parity with binutils.
1106 template <typename InsnType>
1107 static DecodeStatus DecodeDINS(MCInst &MI, InsnType Insn, uint64_t Address,
1108  const void *Decoder) {
1109  unsigned Msbd = fieldFromInstruction(Insn, 11, 5);
1110  unsigned Lsb = fieldFromInstruction(Insn, 6, 5);
1111  unsigned Size = 0;
1112  unsigned Pos = 0;
1113 
1114  switch (MI.getOpcode()) {
1115  case Mips::DINS:
1116  Pos = Lsb;
1117  Size = Msbd + 1 - Pos;
1118  break;
1119  case Mips::DINSM:
1120  Pos = Lsb;
1121  Size = Msbd + 33 - Pos;
1122  break;
1123  case Mips::DINSU:
1124  Pos = Lsb + 32;
1125  // mbsd = pos + size - 33
1126  // mbsd - pos + 33 = size
1127  Size = Msbd + 33 - Pos;
1128  break;
1129  default:
1130  llvm_unreachable("Unknown DINS instruction!");
1131  }
1132 
1133  InsnType Rs = fieldFromInstruction(Insn, 21, 5);
1134  InsnType Rt = fieldFromInstruction(Insn, 16, 5);
1135 
1136  MI.setOpcode(Mips::DINS);
1137  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID, Rt)));
1138  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID, Rs)));
1139  MI.addOperand(MCOperand::createImm(Pos));
1140  MI.addOperand(MCOperand::createImm(Size));
1141 
1142  return MCDisassembler::Success;
1143 }
1144 
1145 // Auto-generated decoder wouldn't add the third operand for CRC32*.
1146 template <typename InsnType>
1147 static DecodeStatus DecodeCRC(MCInst &MI, InsnType Insn, uint64_t Address,
1148  const void *Decoder) {
1149  InsnType Rs = fieldFromInstruction(Insn, 21, 5);
1150  InsnType Rt = fieldFromInstruction(Insn, 16, 5);
1151  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1152  Rt)));
1153  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1154  Rs)));
1155  MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1156  Rt)));
1157  return MCDisassembler::Success;
1158 }
1159 
1160 /// Read two bytes from the ArrayRef and return 16 bit halfword sorted
1161 /// according to the given endianness.
1162 static DecodeStatus readInstruction16(ArrayRef<uint8_t> Bytes, uint64_t Address,
1163  uint64_t &Size, uint32_t &Insn,
1164  bool IsBigEndian) {
1165  // We want to read exactly 2 Bytes of data.
1166  if (Bytes.size() < 2) {
1167  Size = 0;
1168  return MCDisassembler::Fail;
1169  }
1170 
1171  if (IsBigEndian) {
1172  Insn = (Bytes[0] << 8) | Bytes[1];
1173  } else {
1174  Insn = (Bytes[1] << 8) | Bytes[0];
1175  }
1176 
1177  return MCDisassembler::Success;
1178 }
1179 
1180 /// Read four bytes from the ArrayRef and return 32 bit word sorted
1181 /// according to the given endianness.
1182 static DecodeStatus readInstruction32(ArrayRef<uint8_t> Bytes, uint64_t Address,
1183  uint64_t &Size, uint32_t &Insn,
1184  bool IsBigEndian, bool IsMicroMips) {
1185  // We want to read exactly 4 Bytes of data.
1186  if (Bytes.size() < 4) {
1187  Size = 0;
1188  return MCDisassembler::Fail;
1189  }
1190 
1191  // High 16 bits of a 32-bit microMIPS instruction (where the opcode is)
1192  // always precede the low 16 bits in the instruction stream (that is, they
1193  // are placed at lower addresses in the instruction stream).
1194  //
1195  // microMIPS byte ordering:
1196  // Big-endian: 0 | 1 | 2 | 3
1197  // Little-endian: 1 | 0 | 3 | 2
1198 
1199  if (IsBigEndian) {
1200  // Encoded as a big-endian 32-bit word in the stream.
1201  Insn =
1202  (Bytes[3] << 0) | (Bytes[2] << 8) | (Bytes[1] << 16) | (Bytes[0] << 24);
1203  } else {
1204  if (IsMicroMips) {
1205  Insn = (Bytes[2] << 0) | (Bytes[3] << 8) | (Bytes[0] << 16) |
1206  (Bytes[1] << 24);
1207  } else {
1208  Insn = (Bytes[0] << 0) | (Bytes[1] << 8) | (Bytes[2] << 16) |
1209  (Bytes[3] << 24);
1210  }
1211  }
1212 
1213  return MCDisassembler::Success;
1214 }
1215 
1216 DecodeStatus MipsDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
1217  ArrayRef<uint8_t> Bytes,
1218  uint64_t Address,
1219  raw_ostream &VStream,
1220  raw_ostream &CStream) const {
1221  uint32_t Insn;
1222  DecodeStatus Result;
1223  Size = 0;
1224 
1225  if (IsMicroMips) {
1226  Result = readInstruction16(Bytes, Address, Size, Insn, IsBigEndian);
1227  if (Result == MCDisassembler::Fail)
1228  return MCDisassembler::Fail;
1229 
1230  if (hasMips32r6()) {
1231  LLVM_DEBUG(
1232  dbgs() << "Trying MicroMipsR616 table (16-bit instructions):\n");
1233  // Calling the auto-generated decoder function for microMIPS32R6
1234  // 16-bit instructions.
1235  Result = decodeInstruction(DecoderTableMicroMipsR616, Instr, Insn,
1236  Address, this, STI);
1237  if (Result != MCDisassembler::Fail) {
1238  Size = 2;
1239  return Result;
1240  }
1241  }
1242 
1243  LLVM_DEBUG(dbgs() << "Trying MicroMips16 table (16-bit instructions):\n");
1244  // Calling the auto-generated decoder function for microMIPS 16-bit
1245  // instructions.
1246  Result = decodeInstruction(DecoderTableMicroMips16, Instr, Insn, Address,
1247  this, STI);
1248  if (Result != MCDisassembler::Fail) {
1249  Size = 2;
1250  return Result;
1251  }
1252 
1253  Result = readInstruction32(Bytes, Address, Size, Insn, IsBigEndian, true);
1254  if (Result == MCDisassembler::Fail)
1255  return MCDisassembler::Fail;
1256 
1257  if (hasMips32r6()) {
1258  LLVM_DEBUG(
1259  dbgs() << "Trying MicroMips32r632 table (32-bit instructions):\n");
1260  // Calling the auto-generated decoder function.
1261  Result = decodeInstruction(DecoderTableMicroMipsR632, Instr, Insn, Address,
1262  this, STI);
1263  if (Result != MCDisassembler::Fail) {
1264  Size = 4;
1265  return Result;
1266  }
1267  }
1268 
1269  LLVM_DEBUG(dbgs() << "Trying MicroMips32 table (32-bit instructions):\n");
1270  // Calling the auto-generated decoder function.
1271  Result = decodeInstruction(DecoderTableMicroMips32, Instr, Insn, Address,
1272  this, STI);
1273  if (Result != MCDisassembler::Fail) {
1274  Size = 4;
1275  return Result;
1276  }
1277 
1278  if (isFP64()) {
1279  LLVM_DEBUG(dbgs() << "Trying MicroMipsFP64 table (32-bit opcodes):\n");
1280  Result = decodeInstruction(DecoderTableMicroMipsFP6432, Instr, Insn,
1281  Address, this, STI);
1282  if (Result != MCDisassembler::Fail) {
1283  Size = 4;
1284  return Result;
1285  }
1286  }
1287 
1288  // This is an invalid instruction. Claim that the Size is 2 bytes. Since
1289  // microMIPS instructions have a minimum alignment of 2, the next 2 bytes
1290  // could form a valid instruction. The two bytes we rejected as an
1291  // instruction could have actually beeen an inline constant pool that is
1292  // unconditionally branched over.
1293  Size = 2;
1294  return MCDisassembler::Fail;
1295  }
1296 
1297  // Attempt to read the instruction so that we can attempt to decode it. If
1298  // the buffer is not 4 bytes long, let the higher level logic figure out
1299  // what to do with a size of zero and MCDisassembler::Fail.
1300  Result = readInstruction32(Bytes, Address, Size, Insn, IsBigEndian, false);
1301  if (Result == MCDisassembler::Fail)
1302  return MCDisassembler::Fail;
1303 
1304  // The only instruction size for standard encoded MIPS.
1305  Size = 4;
1306 
1307  if (hasCOP3()) {
1308  LLVM_DEBUG(dbgs() << "Trying COP3_ table (32-bit opcodes):\n");
1309  Result =
1310  decodeInstruction(DecoderTableCOP3_32, Instr, Insn, Address, this, STI);
1311  if (Result != MCDisassembler::Fail)
1312  return Result;
1313  }
1314 
1315  if (hasMips32r6() && isGP64()) {
1316  LLVM_DEBUG(
1317  dbgs() << "Trying Mips32r6_64r6 (GPR64) table (32-bit opcodes):\n");
1318  Result = decodeInstruction(DecoderTableMips32r6_64r6_GP6432, Instr, Insn,
1319  Address, this, STI);
1320  if (Result != MCDisassembler::Fail)
1321  return Result;
1322  }
1323 
1324  if (hasMips32r6() && isPTR64()) {
1325  LLVM_DEBUG(
1326  dbgs() << "Trying Mips32r6_64r6 (PTR64) table (32-bit opcodes):\n");
1327  Result = decodeInstruction(DecoderTableMips32r6_64r6_PTR6432, Instr, Insn,
1328  Address, this, STI);
1329  if (Result != MCDisassembler::Fail)
1330  return Result;
1331  }
1332 
1333  if (hasMips32r6()) {
1334  LLVM_DEBUG(dbgs() << "Trying Mips32r6_64r6 table (32-bit opcodes):\n");
1335  Result = decodeInstruction(DecoderTableMips32r6_64r632, Instr, Insn,
1336  Address, this, STI);
1337  if (Result != MCDisassembler::Fail)
1338  return Result;
1339  }
1340 
1341  if (hasMips2() && isPTR64()) {
1342  LLVM_DEBUG(
1343  dbgs() << "Trying Mips32r6_64r6 (PTR64) table (32-bit opcodes):\n");
1344  Result = decodeInstruction(DecoderTableMips32_64_PTR6432, Instr, Insn,
1345  Address, this, STI);
1346  if (Result != MCDisassembler::Fail)
1347  return Result;
1348  }
1349 
1350  if (hasCnMips()) {
1351  LLVM_DEBUG(dbgs() << "Trying CnMips table (32-bit opcodes):\n");
1352  Result = decodeInstruction(DecoderTableCnMips32, Instr, Insn,
1353  Address, this, STI);
1354  if (Result != MCDisassembler::Fail)
1355  return Result;
1356  }
1357 
1358  if (isGP64()) {
1359  LLVM_DEBUG(dbgs() << "Trying Mips64 (GPR64) table (32-bit opcodes):\n");
1360  Result = decodeInstruction(DecoderTableMips6432, Instr, Insn,
1361  Address, this, STI);
1362  if (Result != MCDisassembler::Fail)
1363  return Result;
1364  }
1365 
1366  if (isFP64()) {
1367  LLVM_DEBUG(
1368  dbgs() << "Trying MipsFP64 (64 bit FPU) table (32-bit opcodes):\n");
1369  Result = decodeInstruction(DecoderTableMipsFP6432, Instr, Insn,
1370  Address, this, STI);
1371  if (Result != MCDisassembler::Fail)
1372  return Result;
1373  }
1374 
1375  LLVM_DEBUG(dbgs() << "Trying Mips table (32-bit opcodes):\n");
1376  // Calling the auto-generated decoder function.
1377  Result =
1378  decodeInstruction(DecoderTableMips32, Instr, Insn, Address, this, STI);
1379  if (Result != MCDisassembler::Fail)
1380  return Result;
1381 
1382  return MCDisassembler::Fail;
1383 }
1384 
1385 static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst &Inst,
1386  unsigned RegNo,
1387  uint64_t Address,
1388  const void *Decoder) {
1389  return MCDisassembler::Fail;
1390 }
1391 
1392 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst,
1393  unsigned RegNo,
1394  uint64_t Address,
1395  const void *Decoder) {
1396  if (RegNo > 31)
1397  return MCDisassembler::Fail;
1398 
1399  unsigned Reg = getReg(Decoder, Mips::GPR64RegClassID, RegNo);
1400  Inst.addOperand(MCOperand::createReg(Reg));
1401  return MCDisassembler::Success;
1402 }
1403 
1404 static DecodeStatus DecodeGPRMM16RegisterClass(MCInst &Inst,
1405  unsigned RegNo,
1406  uint64_t Address,
1407  const void *Decoder) {
1408  if (RegNo > 7)
1409  return MCDisassembler::Fail;
1410  unsigned Reg = getReg(Decoder, Mips::GPRMM16RegClassID, RegNo);
1411  Inst.addOperand(MCOperand::createReg(Reg));
1412  return MCDisassembler::Success;
1413 }
1414 
1415 static DecodeStatus DecodeGPRMM16ZeroRegisterClass(MCInst &Inst,
1416  unsigned RegNo,
1417  uint64_t Address,
1418  const void *Decoder) {
1419  if (RegNo > 7)
1420  return MCDisassembler::Fail;
1421  unsigned Reg = getReg(Decoder, Mips::GPRMM16ZeroRegClassID, RegNo);
1422  Inst.addOperand(MCOperand::createReg(Reg));
1423  return MCDisassembler::Success;
1424 }
1425 
1426 static DecodeStatus DecodeGPRMM16MovePRegisterClass(MCInst &Inst,
1427  unsigned RegNo,
1428  uint64_t Address,
1429  const void *Decoder) {
1430  if (RegNo > 7)
1431  return MCDisassembler::Fail;
1432  unsigned Reg = getReg(Decoder, Mips::GPRMM16MovePRegClassID, RegNo);
1433  Inst.addOperand(MCOperand::createReg(Reg));
1434  return MCDisassembler::Success;
1435 }
1436 
1437 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst,
1438  unsigned RegNo,
1439  uint64_t Address,
1440  const void *Decoder) {
1441  if (RegNo > 31)
1442  return MCDisassembler::Fail;
1443  unsigned Reg = getReg(Decoder, Mips::GPR32RegClassID, RegNo);
1444  Inst.addOperand(MCOperand::createReg(Reg));
1445  return MCDisassembler::Success;
1446 }
1447 
1448 static DecodeStatus DecodePtrRegisterClass(MCInst &Inst,
1449  unsigned RegNo,
1450  uint64_t Address,
1451  const void *Decoder) {
1452  if (static_cast<const MipsDisassembler *>(Decoder)->isGP64())
1453  return DecodeGPR64RegisterClass(Inst, RegNo, Address, Decoder);
1454 
1455  return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
1456 }
1457 
1458 static DecodeStatus DecodeDSPRRegisterClass(MCInst &Inst,
1459  unsigned RegNo,
1460  uint64_t Address,
1461  const void *Decoder) {
1462  return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
1463 }
1464 
1465 static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst,
1466  unsigned RegNo,
1467  uint64_t Address,
1468  const void *Decoder) {
1469  if (RegNo > 31)
1470  return MCDisassembler::Fail;
1471 
1472  unsigned Reg = getReg(Decoder, Mips::FGR64RegClassID, RegNo);
1473  Inst.addOperand(MCOperand::createReg(Reg));
1474  return MCDisassembler::Success;
1475 }
1476 
1477 static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst,
1478  unsigned RegNo,
1479  uint64_t Address,
1480  const void *Decoder) {
1481  if (RegNo > 31)
1482  return MCDisassembler::Fail;
1483 
1484  unsigned Reg = getReg(Decoder, Mips::FGR32RegClassID, RegNo);
1485  Inst.addOperand(MCOperand::createReg(Reg));
1486  return MCDisassembler::Success;
1487 }
1488 
1489 static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst,
1490  unsigned RegNo,
1491  uint64_t Address,
1492  const void *Decoder) {
1493  if (RegNo > 31)
1494  return MCDisassembler::Fail;
1495  unsigned Reg = getReg(Decoder, Mips::CCRRegClassID, RegNo);
1496  Inst.addOperand(MCOperand::createReg(Reg));
1497  return MCDisassembler::Success;
1498 }
1499 
1500 static DecodeStatus DecodeFCCRegisterClass(MCInst &Inst,
1501  unsigned RegNo,
1502  uint64_t Address,
1503  const void *Decoder) {
1504  if (RegNo > 7)
1505  return MCDisassembler::Fail;
1506  unsigned Reg = getReg(Decoder, Mips::FCCRegClassID, RegNo);
1507  Inst.addOperand(MCOperand::createReg(Reg));
1508  return MCDisassembler::Success;
1509 }
1510 
1511 static DecodeStatus DecodeFGRCCRegisterClass(MCInst &Inst, unsigned RegNo,
1512  uint64_t Address,
1513  const void *Decoder) {
1514  if (RegNo > 31)
1515  return MCDisassembler::Fail;
1516 
1517  unsigned Reg = getReg(Decoder, Mips::FGRCCRegClassID, RegNo);
1518  Inst.addOperand(MCOperand::createReg(Reg));
1519  return MCDisassembler::Success;
1520 }
1521 
1522 static DecodeStatus DecodeMem(MCInst &Inst,
1523  unsigned Insn,
1524  uint64_t Address,
1525  const void *Decoder) {
1526  int Offset = SignExtend32<16>(Insn & 0xffff);
1527  unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1528  unsigned Base = fieldFromInstruction(Insn, 21, 5);
1529 
1530  Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1531  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1532 
1533  if (Inst.getOpcode() == Mips::SC ||
1534  Inst.getOpcode() == Mips::SCD)
1535  Inst.addOperand(MCOperand::createReg(Reg));
1536 
1537  Inst.addOperand(MCOperand::createReg(Reg));
1538  Inst.addOperand(MCOperand::createReg(Base));
1539  Inst.addOperand(MCOperand::createImm(Offset));
1540 
1541  return MCDisassembler::Success;
1542 }
1543 
1544 static DecodeStatus DecodeMemEVA(MCInst &Inst,
1545  unsigned Insn,
1546  uint64_t Address,
1547  const void *Decoder) {
1548  int Offset = SignExtend32<9>(Insn >> 7);
1549  unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1550  unsigned Base = fieldFromInstruction(Insn, 21, 5);
1551 
1552  Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1553  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1554 
1555  if (Inst.getOpcode() == Mips::SCE)
1556  Inst.addOperand(MCOperand::createReg(Reg));
1557 
1558  Inst.addOperand(MCOperand::createReg(Reg));
1559  Inst.addOperand(MCOperand::createReg(Base));
1560  Inst.addOperand(MCOperand::createImm(Offset));
1561 
1562  return MCDisassembler::Success;
1563 }
1564 
1565 static DecodeStatus DecodeLoadByte15(MCInst &Inst,
1566  unsigned Insn,
1567  uint64_t Address,
1568  const void *Decoder) {
1569  int Offset = SignExtend32<16>(Insn & 0xffff);
1570  unsigned Base = fieldFromInstruction(Insn, 16, 5);
1571  unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1572 
1573  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1574  Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1575 
1576  Inst.addOperand(MCOperand::createReg(Reg));
1577  Inst.addOperand(MCOperand::createReg(Base));
1578  Inst.addOperand(MCOperand::createImm(Offset));
1579 
1580  return MCDisassembler::Success;
1581 }
1582 
1583 static DecodeStatus DecodeCacheOp(MCInst &Inst,
1584  unsigned Insn,
1585  uint64_t Address,
1586  const void *Decoder) {
1587  int Offset = SignExtend32<16>(Insn & 0xffff);
1588  unsigned Hint = fieldFromInstruction(Insn, 16, 5);
1589  unsigned Base = fieldFromInstruction(Insn, 21, 5);
1590 
1591  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1592 
1593  Inst.addOperand(MCOperand::createReg(Base));
1594  Inst.addOperand(MCOperand::createImm(Offset));
1595  Inst.addOperand(MCOperand::createImm(Hint));
1596 
1597  return MCDisassembler::Success;
1598 }
1599 
1600 static DecodeStatus DecodeCacheOpMM(MCInst &Inst,
1601  unsigned Insn,
1602  uint64_t Address,
1603  const void *Decoder) {
1604  int Offset = SignExtend32<12>(Insn & 0xfff);
1605  unsigned Base = fieldFromInstruction(Insn, 16, 5);
1606  unsigned Hint = fieldFromInstruction(Insn, 21, 5);
1607 
1608  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1609 
1610  Inst.addOperand(MCOperand::createReg(Base));
1611  Inst.addOperand(MCOperand::createImm(Offset));
1612  Inst.addOperand(MCOperand::createImm(Hint));
1613 
1614  return MCDisassembler::Success;
1615 }
1616 
1617 static DecodeStatus DecodePrefeOpMM(MCInst &Inst,
1618  unsigned Insn,
1619  uint64_t Address,
1620  const void *Decoder) {
1621  int Offset = SignExtend32<9>(Insn & 0x1ff);
1622  unsigned Base = fieldFromInstruction(Insn, 16, 5);
1623  unsigned Hint = fieldFromInstruction(Insn, 21, 5);
1624 
1625  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1626 
1627  Inst.addOperand(MCOperand::createReg(Base));
1628  Inst.addOperand(MCOperand::createImm(Offset));
1629  Inst.addOperand(MCOperand::createImm(Hint));
1630 
1631  return MCDisassembler::Success;
1632 }
1633 
1634 static DecodeStatus DecodeCacheeOp_CacheOpR6(MCInst &Inst,
1635  unsigned Insn,
1636  uint64_t Address,
1637  const void *Decoder) {
1638  int Offset = SignExtend32<9>(Insn >> 7);
1639  unsigned Hint = fieldFromInstruction(Insn, 16, 5);
1640  unsigned Base = fieldFromInstruction(Insn, 21, 5);
1641 
1642  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1643 
1644  Inst.addOperand(MCOperand::createReg(Base));
1645  Inst.addOperand(MCOperand::createImm(Offset));
1646  Inst.addOperand(MCOperand::createImm(Hint));
1647 
1648  return MCDisassembler::Success;
1649 }
1650 
1651 static DecodeStatus DecodeSyncI(MCInst &Inst,
1652  unsigned Insn,
1653  uint64_t Address,
1654  const void *Decoder) {
1655  int Offset = SignExtend32<16>(Insn & 0xffff);
1656  unsigned Base = fieldFromInstruction(Insn, 21, 5);
1657 
1658  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1659 
1660  Inst.addOperand(MCOperand::createReg(Base));
1661  Inst.addOperand(MCOperand::createImm(Offset));
1662 
1663  return MCDisassembler::Success;
1664 }
1665 
1666 static DecodeStatus DecodeSyncI_MM(MCInst &Inst, unsigned Insn,
1667  uint64_t Address, const void *Decoder) {
1668  int Offset = SignExtend32<16>(Insn & 0xffff);
1669  unsigned Base = fieldFromInstruction(Insn, 16, 5);
1670 
1671  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1672 
1673  Inst.addOperand(MCOperand::createReg(Base));
1674  Inst.addOperand(MCOperand::createImm(Offset));
1675 
1676  return MCDisassembler::Success;
1677 }
1678 
1679 static DecodeStatus DecodeSynciR6(MCInst &Inst,
1680  unsigned Insn,
1681  uint64_t Address,
1682  const void *Decoder) {
1683  int Immediate = SignExtend32<16>(Insn & 0xffff);
1684  unsigned Base = fieldFromInstruction(Insn, 16, 5);
1685 
1686  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1687 
1688  Inst.addOperand(MCOperand::createReg(Base));
1689  Inst.addOperand(MCOperand::createImm(Immediate));
1690 
1691  return MCDisassembler::Success;
1692 }
1693 
1694 static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn,
1695  uint64_t Address, const void *Decoder) {
1696  int Offset = SignExtend32<10>(fieldFromInstruction(Insn, 16, 10));
1697  unsigned Reg = fieldFromInstruction(Insn, 6, 5);
1698  unsigned Base = fieldFromInstruction(Insn, 11, 5);
1699 
1700  Reg = getReg(Decoder, Mips::MSA128BRegClassID, Reg);
1701  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1702 
1703  Inst.addOperand(MCOperand::createReg(Reg));
1704  Inst.addOperand(MCOperand::createReg(Base));
1705 
1706  // The immediate field of an LD/ST instruction is scaled which means it must
1707  // be multiplied (when decoding) by the size (in bytes) of the instructions'
1708  // data format.
1709  // .b - 1 byte
1710  // .h - 2 bytes
1711  // .w - 4 bytes
1712  // .d - 8 bytes
1713  switch(Inst.getOpcode())
1714  {
1715  default:
1716  assert(false && "Unexpected instruction");
1717  return MCDisassembler::Fail;
1718  break;
1719  case Mips::LD_B:
1720  case Mips::ST_B:
1721  Inst.addOperand(MCOperand::createImm(Offset));
1722  break;
1723  case Mips::LD_H:
1724  case Mips::ST_H:
1725  Inst.addOperand(MCOperand::createImm(Offset * 2));
1726  break;
1727  case Mips::LD_W:
1728  case Mips::ST_W:
1729  Inst.addOperand(MCOperand::createImm(Offset * 4));
1730  break;
1731  case Mips::LD_D:
1732  case Mips::ST_D:
1733  Inst.addOperand(MCOperand::createImm(Offset * 8));
1734  break;
1735  }
1736 
1737  return MCDisassembler::Success;
1738 }
1739 
1740 static DecodeStatus DecodeMemMMImm4(MCInst &Inst,
1741  unsigned Insn,
1742  uint64_t Address,
1743  const void *Decoder) {
1744  unsigned Offset = Insn & 0xf;
1745  unsigned Reg = fieldFromInstruction(Insn, 7, 3);
1746  unsigned Base = fieldFromInstruction(Insn, 4, 3);
1747 
1748  switch (Inst.getOpcode()) {
1749  case Mips::LBU16_MM:
1750  case Mips::LHU16_MM:
1751  case Mips::LW16_MM:
1752  if (DecodeGPRMM16RegisterClass(Inst, Reg, Address, Decoder)
1753  == MCDisassembler::Fail)
1754  return MCDisassembler::Fail;
1755  break;
1756  case Mips::SB16_MM:
1757  case Mips::SB16_MMR6:
1758  case Mips::SH16_MM:
1759  case Mips::SH16_MMR6:
1760  case Mips::SW16_MM:
1761  case Mips::SW16_MMR6:
1762  if (DecodeGPRMM16ZeroRegisterClass(Inst, Reg, Address, Decoder)
1763  == MCDisassembler::Fail)
1764  return MCDisassembler::Fail;
1765  break;
1766  }
1767 
1768  if (DecodeGPRMM16RegisterClass(Inst, Base, Address, Decoder)
1769  == MCDisassembler::Fail)
1770  return MCDisassembler::Fail;
1771 
1772  switch (Inst.getOpcode()) {
1773  case Mips::LBU16_MM:
1774  if (Offset == 0xf)
1775  Inst.addOperand(MCOperand::createImm(-1));
1776  else
1777  Inst.addOperand(MCOperand::createImm(Offset));
1778  break;
1779  case Mips::SB16_MM:
1780  case Mips::SB16_MMR6:
1781  Inst.addOperand(MCOperand::createImm(Offset));
1782  break;
1783  case Mips::LHU16_MM:
1784  case Mips::SH16_MM:
1785  case Mips::SH16_MMR6:
1786  Inst.addOperand(MCOperand::createImm(Offset << 1));
1787  break;
1788  case Mips::LW16_MM:
1789  case Mips::SW16_MM:
1790  case Mips::SW16_MMR6:
1791  Inst.addOperand(MCOperand::createImm(Offset << 2));
1792  break;
1793  }
1794 
1795  return MCDisassembler::Success;
1796 }
1797 
1798 static DecodeStatus DecodeMemMMSPImm5Lsl2(MCInst &Inst,
1799  unsigned Insn,
1800  uint64_t Address,
1801  const void *Decoder) {
1802  unsigned Offset = Insn & 0x1F;
1803  unsigned Reg = fieldFromInstruction(Insn, 5, 5);
1804 
1805  Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1806 
1807  Inst.addOperand(MCOperand::createReg(Reg));
1808  Inst.addOperand(MCOperand::createReg(Mips::SP));
1809  Inst.addOperand(MCOperand::createImm(Offset << 2));
1810 
1811  return MCDisassembler::Success;
1812 }
1813 
1814 static DecodeStatus DecodeMemMMGPImm7Lsl2(MCInst &Inst,
1815  unsigned Insn,
1816  uint64_t Address,
1817  const void *Decoder) {
1818  unsigned Offset = Insn & 0x7F;
1819  unsigned Reg = fieldFromInstruction(Insn, 7, 3);
1820 
1821  Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1822 
1823  Inst.addOperand(MCOperand::createReg(Reg));
1824  Inst.addOperand(MCOperand::createReg(Mips::GP));
1825  Inst.addOperand(MCOperand::createImm(Offset << 2));
1826 
1827  return MCDisassembler::Success;
1828 }
1829 
1830 static DecodeStatus DecodeMemMMReglistImm4Lsl2(MCInst &Inst,
1831  unsigned Insn,
1832  uint64_t Address,
1833  const void *Decoder) {
1834  int Offset;
1835  switch (Inst.getOpcode()) {
1836  case Mips::LWM16_MMR6:
1837  case Mips::SWM16_MMR6:
1838  Offset = fieldFromInstruction(Insn, 4, 4);
1839  break;
1840  default:
1841  Offset = SignExtend32<4>(Insn & 0xf);
1842  break;
1843  }
1844 
1845  if (DecodeRegListOperand16(Inst, Insn, Address, Decoder)
1846  == MCDisassembler::Fail)
1847  return MCDisassembler::Fail;
1848 
1849  Inst.addOperand(MCOperand::createReg(Mips::SP));
1850  Inst.addOperand(MCOperand::createImm(Offset << 2));
1851 
1852  return MCDisassembler::Success;
1853 }
1854 
1855 static DecodeStatus DecodeMemMMImm9(MCInst &Inst,
1856  unsigned Insn,
1857  uint64_t Address,
1858  const void *Decoder) {
1859  int Offset = SignExtend32<9>(Insn & 0x1ff);
1860  unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1861  unsigned Base = fieldFromInstruction(Insn, 16, 5);
1862 
1863  Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1864  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1865 
1866  if (Inst.getOpcode() == Mips::SCE_MM || Inst.getOpcode() == Mips::SC_MMR6)
1867  Inst.addOperand(MCOperand::createReg(Reg));
1868 
1869  Inst.addOperand(MCOperand::createReg(Reg));
1870  Inst.addOperand(MCOperand::createReg(Base));
1871  Inst.addOperand(MCOperand::createImm(Offset));
1872 
1873  return MCDisassembler::Success;
1874 }
1875 
1876 static DecodeStatus DecodeMemMMImm12(MCInst &Inst,
1877  unsigned Insn,
1878  uint64_t Address,
1879  const void *Decoder) {
1880  int Offset = SignExtend32<12>(Insn & 0x0fff);
1881  unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1882  unsigned Base = fieldFromInstruction(Insn, 16, 5);
1883 
1884  Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1885  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1886 
1887  switch (Inst.getOpcode()) {
1888  case Mips::SWM32_MM:
1889  case Mips::LWM32_MM:
1890  if (DecodeRegListOperand(Inst, Insn, Address, Decoder)
1891  == MCDisassembler::Fail)
1892  return MCDisassembler::Fail;
1893  Inst.addOperand(MCOperand::createReg(Base));
1894  Inst.addOperand(MCOperand::createImm(Offset));
1895  break;
1896  case Mips::SC_MM:
1897  Inst.addOperand(MCOperand::createReg(Reg));
1898  LLVM_FALLTHROUGH;
1899  default:
1900  Inst.addOperand(MCOperand::createReg(Reg));
1901  if (Inst.getOpcode() == Mips::LWP_MM || Inst.getOpcode() == Mips::SWP_MM)
1902  Inst.addOperand(MCOperand::createReg(Reg+1));
1903 
1904  Inst.addOperand(MCOperand::createReg(Base));
1905  Inst.addOperand(MCOperand::createImm(Offset));
1906  }
1907 
1908  return MCDisassembler::Success;
1909 }
1910 
1911 static DecodeStatus DecodeMemMMImm16(MCInst &Inst,
1912  unsigned Insn,
1913  uint64_t Address,
1914  const void *Decoder) {
1915  int Offset = SignExtend32<16>(Insn & 0xffff);
1916  unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1917  unsigned Base = fieldFromInstruction(Insn, 16, 5);
1918 
1919  Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1920  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1921 
1922  Inst.addOperand(MCOperand::createReg(Reg));
1923  Inst.addOperand(MCOperand::createReg(Base));
1924  Inst.addOperand(MCOperand::createImm(Offset));
1925 
1926  return MCDisassembler::Success;
1927 }
1928 
1929 static DecodeStatus DecodeFMem(MCInst &Inst,
1930  unsigned Insn,
1931  uint64_t Address,
1932  const void *Decoder) {
1933  int Offset = SignExtend32<16>(Insn & 0xffff);
1934  unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1935  unsigned Base = fieldFromInstruction(Insn, 21, 5);
1936 
1937  Reg = getReg(Decoder, Mips::FGR64RegClassID, Reg);
1938  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1939 
1940  Inst.addOperand(MCOperand::createReg(Reg));
1941  Inst.addOperand(MCOperand::createReg(Base));
1942  Inst.addOperand(MCOperand::createImm(Offset));
1943 
1944  return MCDisassembler::Success;
1945 }
1946 
1947 static DecodeStatus DecodeFMemMMR2(MCInst &Inst, unsigned Insn,
1948  uint64_t Address, const void *Decoder) {
1949  // This function is the same as DecodeFMem but with the Reg and Base fields
1950  // swapped according to microMIPS spec.
1951  int Offset = SignExtend32<16>(Insn & 0xffff);
1952  unsigned Base = fieldFromInstruction(Insn, 16, 5);
1953  unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1954 
1955  Reg = getReg(Decoder, Mips::FGR64RegClassID, Reg);
1956  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1957 
1958  Inst.addOperand(MCOperand::createReg(Reg));
1959  Inst.addOperand(MCOperand::createReg(Base));
1960  Inst.addOperand(MCOperand::createImm(Offset));
1961 
1962  return MCDisassembler::Success;
1963 }
1964 
1965 static DecodeStatus DecodeFMem2(MCInst &Inst,
1966  unsigned Insn,
1967  uint64_t Address,
1968  const void *Decoder) {
1969  int Offset = SignExtend32<16>(Insn & 0xffff);
1970  unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1971  unsigned Base = fieldFromInstruction(Insn, 21, 5);
1972 
1973  Reg = getReg(Decoder, Mips::COP2RegClassID, Reg);
1974  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1975 
1976  Inst.addOperand(MCOperand::createReg(Reg));
1977  Inst.addOperand(MCOperand::createReg(Base));
1978  Inst.addOperand(MCOperand::createImm(Offset));
1979 
1980  return MCDisassembler::Success;
1981 }
1982 
1983 static DecodeStatus DecodeFMem3(MCInst &Inst,
1984  unsigned Insn,
1985  uint64_t Address,
1986  const void *Decoder) {
1987  int Offset = SignExtend32<16>(Insn & 0xffff);
1988  unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1989  unsigned Base = fieldFromInstruction(Insn, 21, 5);
1990 
1991  Reg = getReg(Decoder, Mips::COP3RegClassID, Reg);
1992  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1993 
1994  Inst.addOperand(MCOperand::createReg(Reg));
1995  Inst.addOperand(MCOperand::createReg(Base));
1996  Inst.addOperand(MCOperand::createImm(Offset));
1997 
1998  return MCDisassembler::Success;
1999 }
2000 
2001 static DecodeStatus DecodeFMemCop2R6(MCInst &Inst,
2002  unsigned Insn,
2003  uint64_t Address,
2004  const void *Decoder) {
2005  int Offset = SignExtend32<11>(Insn & 0x07ff);
2006  unsigned Reg = fieldFromInstruction(Insn, 16, 5);
2007  unsigned Base = fieldFromInstruction(Insn, 11, 5);
2008 
2009  Reg = getReg(Decoder, Mips::COP2RegClassID, Reg);
2010  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
2011 
2012  Inst.addOperand(MCOperand::createReg(Reg));
2013  Inst.addOperand(MCOperand::createReg(Base));
2014  Inst.addOperand(MCOperand::createImm(Offset));
2015 
2016  return MCDisassembler::Success;
2017 }
2018 
2019 static DecodeStatus DecodeFMemCop2MMR6(MCInst &Inst, unsigned Insn,
2020  uint64_t Address, const void *Decoder) {
2021  int Offset = SignExtend32<11>(Insn & 0x07ff);
2022  unsigned Reg = fieldFromInstruction(Insn, 21, 5);
2023  unsigned Base = fieldFromInstruction(Insn, 16, 5);
2024 
2025  Reg = getReg(Decoder, Mips::COP2RegClassID, Reg);
2026  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
2027 
2028  Inst.addOperand(MCOperand::createReg(Reg));
2029  Inst.addOperand(MCOperand::createReg(Base));
2030  Inst.addOperand(MCOperand::createImm(Offset));
2031 
2032  return MCDisassembler::Success;
2033 }
2034 
2035 static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst,
2036  unsigned Insn,
2037  uint64_t Address,
2038  const void *Decoder) {
2039  int64_t Offset = SignExtend64<9>((Insn >> 7) & 0x1ff);
2040  unsigned Rt = fieldFromInstruction(Insn, 16, 5);
2041  unsigned Base = fieldFromInstruction(Insn, 21, 5);
2042 
2043  Rt = getReg(Decoder, Mips::GPR32RegClassID, Rt);
2044  Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
2045 
2046  if(Inst.getOpcode() == Mips::SC_R6 || Inst.getOpcode() == Mips::SCD_R6){
2047  Inst.addOperand(MCOperand::createReg(Rt));
2048  }
2049 
2050  Inst.addOperand(MCOperand::createReg(Rt));
2051  Inst.addOperand(MCOperand::createReg(Base));
2052  Inst.addOperand(MCOperand::createImm(Offset));
2053 
2054  return MCDisassembler::Success;
2055 }
2056 
2057 static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst,
2058  unsigned RegNo,
2059  uint64_t Address,
2060  const void *Decoder) {
2061  // Currently only hardware register 29 is supported.
2062  if (RegNo != 29)
2063  return MCDisassembler::Fail;
2064  Inst.addOperand(MCOperand::createReg(Mips::HWR29));
2065  return MCDisassembler::Success;
2066 }
2067 
2068 static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst,
2069  unsigned RegNo,
2070  uint64_t Address,
2071  const void *Decoder) {
2072  if (RegNo > 30 || RegNo %2)
2073  return MCDisassembler::Fail;
2074 
2075  unsigned Reg = getReg(Decoder, Mips::AFGR64RegClassID, RegNo /2);
2076  Inst.addOperand(MCOperand::createReg(Reg));
2077  return MCDisassembler::Success;
2078 }
2079 
2080 static DecodeStatus DecodeACC64DSPRegisterClass(MCInst &Inst,
2081  unsigned RegNo,
2082  uint64_t Address,
2083  const void *Decoder) {
2084  if (RegNo >= 4)
2085  return MCDisassembler::Fail;
2086 
2087  unsigned Reg = getReg(Decoder, Mips::ACC64DSPRegClassID, RegNo);
2088  Inst.addOperand(MCOperand::createReg(Reg));
2089  return MCDisassembler::Success;
2090 }
2091 
2092 static DecodeStatus DecodeHI32DSPRegisterClass(MCInst &Inst,
2093  unsigned RegNo,
2094  uint64_t Address,
2095  const void *Decoder) {
2096  if (RegNo >= 4)
2097  return MCDisassembler::Fail;
2098 
2099  unsigned Reg = getReg(Decoder, Mips::HI32DSPRegClassID, RegNo);
2100  Inst.addOperand(MCOperand::createReg(Reg));
2101  return MCDisassembler::Success;
2102 }
2103 
2104 static DecodeStatus DecodeLO32DSPRegisterClass(MCInst &Inst,
2105  unsigned RegNo,
2106  uint64_t Address,
2107  const void *Decoder) {
2108  if (RegNo >= 4)
2109  return MCDisassembler::Fail;
2110 
2111  unsigned Reg = getReg(Decoder, Mips::LO32DSPRegClassID, RegNo);
2112  Inst.addOperand(MCOperand::createReg(Reg));
2113  return MCDisassembler::Success;
2114 }
2115 
2116 static DecodeStatus DecodeMSA128BRegisterClass(MCInst &Inst,
2117  unsigned RegNo,
2118  uint64_t Address,
2119  const void *Decoder) {
2120  if (RegNo > 31)
2121  return MCDisassembler::Fail;
2122 
2123  unsigned Reg = getReg(Decoder, Mips::MSA128BRegClassID, RegNo);
2124  Inst.addOperand(MCOperand::createReg(Reg));
2125  return MCDisassembler::Success;
2126 }
2127 
2128 static DecodeStatus DecodeMSA128HRegisterClass(MCInst &Inst,
2129  unsigned RegNo,
2130  uint64_t Address,
2131  const void *Decoder) {
2132  if (RegNo > 31)
2133  return MCDisassembler::Fail;
2134 
2135  unsigned Reg = getReg(Decoder, Mips::MSA128HRegClassID, RegNo);
2136  Inst.addOperand(MCOperand::createReg(Reg));
2137  return MCDisassembler::Success;
2138 }
2139 
2140 static DecodeStatus DecodeMSA128WRegisterClass(MCInst &Inst,
2141  unsigned RegNo,
2142  uint64_t Address,
2143  const void *Decoder) {
2144  if (RegNo > 31)
2145  return MCDisassembler::Fail;
2146 
2147  unsigned Reg = getReg(Decoder, Mips::MSA128WRegClassID, RegNo);
2148  Inst.addOperand(MCOperand::createReg(Reg));
2149  return MCDisassembler::Success;
2150 }
2151 
2152 static DecodeStatus DecodeMSA128DRegisterClass(MCInst &Inst,
2153  unsigned RegNo,
2154  uint64_t Address,
2155  const void *Decoder) {
2156  if (RegNo > 31)
2157  return MCDisassembler::Fail;
2158 
2159  unsigned Reg = getReg(Decoder, Mips::MSA128DRegClassID, RegNo);
2160  Inst.addOperand(MCOperand::createReg(Reg));
2161  return MCDisassembler::Success;
2162 }
2163 
2164 static DecodeStatus DecodeMSACtrlRegisterClass(MCInst &Inst,
2165  unsigned RegNo,
2166  uint64_t Address,
2167  const void *Decoder) {
2168  if (RegNo > 7)
2169  return MCDisassembler::Fail;
2170 
2171  unsigned Reg = getReg(Decoder, Mips::MSACtrlRegClassID, RegNo);
2172  Inst.addOperand(MCOperand::createReg(Reg));
2173  return MCDisassembler::Success;
2174 }
2175 
2176 static DecodeStatus DecodeCOP0RegisterClass(MCInst &Inst,
2177  unsigned RegNo,
2178  uint64_t Address,
2179  const void *Decoder) {
2180  if (RegNo > 31)
2181  return MCDisassembler::Fail;
2182 
2183  unsigned Reg = getReg(Decoder, Mips::COP0RegClassID, RegNo);
2184  Inst.addOperand(MCOperand::createReg(Reg));
2185  return MCDisassembler::Success;
2186 }
2187 
2188 static DecodeStatus DecodeCOP2RegisterClass(MCInst &Inst,
2189  unsigned RegNo,
2190  uint64_t Address,
2191  const void *Decoder) {
2192  if (RegNo > 31)
2193  return MCDisassembler::Fail;
2194 
2195  unsigned Reg = getReg(Decoder, Mips::COP2RegClassID, RegNo);
2196  Inst.addOperand(MCOperand::createReg(Reg));
2197  return MCDisassembler::Success;
2198 }
2199 
2200 static DecodeStatus DecodeBranchTarget(MCInst &Inst,
2201  unsigned Offset,
2202  uint64_t Address,
2203  const void *Decoder) {
2204  int32_t BranchOffset = (SignExtend32<16>(Offset) * 4) + 4;
2205  Inst.addOperand(MCOperand::createImm(BranchOffset));
2206  return MCDisassembler::Success;
2207 }
2208 
2209 static DecodeStatus DecodeBranchTarget1SImm16(MCInst &Inst,
2210  unsigned Offset,
2211  uint64_t Address,
2212  const void *Decoder) {
2213  int32_t BranchOffset = (SignExtend32<16>(Offset) * 2);
2214  Inst.addOperand(MCOperand::createImm(BranchOffset));
2215  return MCDisassembler::Success;
2216 }
2217 
2218 static DecodeStatus DecodeJumpTarget(MCInst &Inst,
2219  unsigned Insn,
2220  uint64_t Address,
2221  const void *Decoder) {
2222  unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 2;
2223  Inst.addOperand(MCOperand::createImm(JumpOffset));
2224  return MCDisassembler::Success;
2225 }
2226 
2227 static DecodeStatus DecodeBranchTarget21(MCInst &Inst,
2228  unsigned Offset,
2229  uint64_t Address,
2230  const void *Decoder) {
2231  int32_t BranchOffset = SignExtend32<21>(Offset) * 4 + 4;
2232 
2233  Inst.addOperand(MCOperand::createImm(BranchOffset));
2234  return MCDisassembler::Success;
2235 }
2236 
2237 static DecodeStatus DecodeBranchTarget21MM(MCInst &Inst,
2238  unsigned Offset,
2239  uint64_t Address,
2240  const void *Decoder) {
2241  int32_t BranchOffset = SignExtend32<21>(Offset) * 4 + 4;
2242 
2243  Inst.addOperand(MCOperand::createImm(BranchOffset));
2244  return MCDisassembler::Success;
2245 }
2246 
2247 static DecodeStatus DecodeBranchTarget26(MCInst &Inst,
2248  unsigned Offset,
2249  uint64_t Address,
2250  const void *Decoder) {
2251  int32_t BranchOffset = SignExtend32<26>(Offset) * 4 + 4;
2252 
2253  Inst.addOperand(MCOperand::createImm(BranchOffset));
2254  return MCDisassembler::Success;
2255 }
2256 
2257 static DecodeStatus DecodeBranchTarget7MM(MCInst &Inst,
2258  unsigned Offset,
2259  uint64_t Address,
2260  const void *Decoder) {
2261  int32_t BranchOffset = SignExtend32<8>(Offset << 1);
2262  Inst.addOperand(MCOperand::createImm(BranchOffset));
2263  return MCDisassembler::Success;
2264 }
2265 
2266 static DecodeStatus DecodeBranchTarget10MM(MCInst &Inst,
2267  unsigned Offset,
2268  uint64_t Address,
2269  const void *Decoder) {
2270  int32_t BranchOffset = SignExtend32<11>(Offset << 1);
2271  Inst.addOperand(MCOperand::createImm(BranchOffset));
2272  return MCDisassembler::Success;
2273 }
2274 
2275 static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
2276  unsigned Offset,
2277  uint64_t Address,
2278  const void *Decoder) {
2279  int32_t BranchOffset = SignExtend32<16>(Offset) * 2 + 4;
2280  Inst.addOperand(MCOperand::createImm(BranchOffset));
2281  return MCDisassembler::Success;
2282 }
2283 
2284 static DecodeStatus DecodeBranchTarget26MM(MCInst &Inst,
2285  unsigned Offset,
2286  uint64_t Address,
2287  const void *Decoder) {
2288  int32_t BranchOffset = SignExtend32<27>(Offset << 1);
2289 
2290  Inst.addOperand(MCOperand::createImm(BranchOffset));
2291  return MCDisassembler::Success;
2292 }
2293 
2294 static DecodeStatus DecodeJumpTargetMM(MCInst &Inst,
2295  unsigned Insn,
2296  uint64_t Address,
2297  const void *Decoder) {
2298  unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 1;
2299  Inst.addOperand(MCOperand::createImm(JumpOffset));
2300  return MCDisassembler::Success;
2301 }
2302 
2303 static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
2304  unsigned Value,
2305  uint64_t Address,
2306  const void *Decoder) {
2307  if (Value == 0)
2308  Inst.addOperand(MCOperand::createImm(1));
2309  else if (Value == 0x7)
2310  Inst.addOperand(MCOperand::createImm(-1));
2311  else
2312  Inst.addOperand(MCOperand::createImm(Value << 2));
2313  return MCDisassembler::Success;
2314 }
2315 
2316 static DecodeStatus DecodeLi16Imm(MCInst &Inst,
2317  unsigned Value,
2318  uint64_t Address,
2319  const void *Decoder) {
2320  if (Value == 0x7F)
2321  Inst.addOperand(MCOperand::createImm(-1));
2322  else
2323  Inst.addOperand(MCOperand::createImm(Value));
2324  return MCDisassembler::Success;
2325 }
2326 
2327 static DecodeStatus DecodePOOL16BEncodedField(MCInst &Inst,
2328  unsigned Value,
2329  uint64_t Address,
2330  const void *Decoder) {
2331  Inst.addOperand(MCOperand::createImm(Value == 0x0 ? 8 : Value));
2332  return MCDisassembler::Success;
2333 }
2334 
2335 template <unsigned Bits, int Offset, int Scale>
2336 static DecodeStatus DecodeUImmWithOffsetAndScale(MCInst &Inst, unsigned Value,
2337  uint64_t Address,
2338  const void *Decoder) {
2339  Value &= ((1 << Bits) - 1);
2340  Value *= Scale;
2341  Inst.addOperand(MCOperand::createImm(Value + Offset));
2342  return MCDisassembler::Success;
2343 }
2344 
2345 template <unsigned Bits, int Offset, int ScaleBy>
2346 static DecodeStatus DecodeSImmWithOffsetAndScale(MCInst &Inst, unsigned Value,
2347  uint64_t Address,
2348  const void *Decoder) {
2349  int32_t Imm = SignExtend32<Bits>(Value) * ScaleBy;
2350  Inst.addOperand(MCOperand::createImm(Imm + Offset));
2351  return MCDisassembler::Success;
2352 }
2353 
2354 static DecodeStatus DecodeInsSize(MCInst &Inst,
2355  unsigned Insn,
2356  uint64_t Address,
2357  const void *Decoder) {
2358  // First we need to grab the pos(lsb) from MCInst.
2359  // This function only handles the 32 bit variants of ins, as dins
2360  // variants are handled differently.
2361  int Pos = Inst.getOperand(2).getImm();
2362  int Size = (int) Insn - Pos + 1;
2363  Inst.addOperand(MCOperand::createImm(SignExtend32<16>(Size)));
2364  return MCDisassembler::Success;
2365 }
2366 
2367 static DecodeStatus DecodeSimm19Lsl2(MCInst &Inst, unsigned Insn,
2368  uint64_t Address, const void *Decoder) {
2369  Inst.addOperand(MCOperand::createImm(SignExtend32<19>(Insn) * 4));
2370  return MCDisassembler::Success;
2371 }
2372 
2373 static DecodeStatus DecodeSimm18Lsl3(MCInst &Inst, unsigned Insn,
2374  uint64_t Address, const void *Decoder) {
2375  Inst.addOperand(MCOperand::createImm(SignExtend32<18>(Insn) * 8));
2376  return MCDisassembler::Success;
2377 }
2378 
2379 static DecodeStatus DecodeSimm9SP(MCInst &Inst, unsigned Insn,
2380  uint64_t Address, const void *Decoder) {
2381  int32_t DecodedValue;
2382  switch (Insn) {
2383  case 0: DecodedValue = 256; break;
2384  case 1: DecodedValue = 257; break;
2385  case 510: DecodedValue = -258; break;
2386  case 511: DecodedValue = -257; break;
2387  default: DecodedValue = SignExtend32<9>(Insn); break;
2388  }
2389  Inst.addOperand(MCOperand::createImm(DecodedValue * 4));
2390  return MCDisassembler::Success;
2391 }
2392 
2393 static DecodeStatus DecodeANDI16Imm(MCInst &Inst, unsigned Insn,
2394  uint64_t Address, const void *Decoder) {
2395  // Insn must be >= 0, since it is unsigned that condition is always true.
2396  assert(Insn < 16);
2397  int32_t DecodedValues[] = {128, 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64,
2398  255, 32768, 65535};
2399  Inst.addOperand(MCOperand::createImm(DecodedValues[Insn]));
2400  return MCDisassembler::Success;
2401 }
2402 
2403 static DecodeStatus DecodeRegListOperand(MCInst &Inst,
2404  unsigned Insn,
2405  uint64_t Address,
2406  const void *Decoder) {
2407  unsigned Regs[] = {Mips::S0, Mips::S1, Mips::S2, Mips::S3, Mips::S4, Mips::S5,
2408  Mips::S6, Mips::S7, Mips::FP};
2409  unsigned RegNum;
2410 
2411  unsigned RegLst = fieldFromInstruction(Insn, 21, 5);
2412 
2413  // Empty register lists are not allowed.
2414  if (RegLst == 0)
2415  return MCDisassembler::Fail;
2416 
2417  RegNum = RegLst & 0xf;
2418 
2419  // RegLst values 10-15, and 26-31 are reserved.
2420  if (RegNum > 9)
2421  return MCDisassembler::Fail;
2422 
2423  for (unsigned i = 0; i < RegNum; i++)
2424  Inst.addOperand(MCOperand::createReg(Regs[i]));
2425 
2426  if (RegLst & 0x10)
2427  Inst.addOperand(MCOperand::createReg(Mips::RA));
2428 
2429  return MCDisassembler::Success;
2430 }
2431 
2432 static DecodeStatus DecodeRegListOperand16(MCInst &Inst, unsigned Insn,
2433  uint64_t Address,
2434  const void *Decoder) {
2435  unsigned Regs[] = {Mips::S0, Mips::S1, Mips::S2, Mips::S3};
2436  unsigned RegLst;
2437  switch(Inst.getOpcode()) {
2438  default:
2439  RegLst = fieldFromInstruction(Insn, 4, 2);
2440  break;
2441  case Mips::LWM16_MMR6:
2442  case Mips::SWM16_MMR6:
2443  RegLst = fieldFromInstruction(Insn, 8, 2);
2444  break;
2445  }
2446  unsigned RegNum = RegLst & 0x3;
2447 
2448  for (unsigned i = 0; i <= RegNum; i++)
2449  Inst.addOperand(MCOperand::createReg(Regs[i]));
2450 
2451  Inst.addOperand(MCOperand::createReg(Mips::RA));
2452 
2453  return MCDisassembler::Success;
2454 }
2455 
2456 static DecodeStatus DecodeMovePOperands(MCInst &Inst, unsigned Insn,
2457  uint64_t Address,
2458  const void *Decoder) {
2459  unsigned RegPair = fieldFromInstruction(Insn, 7, 3);
2460  if (DecodeMovePRegPair(Inst, RegPair, Address, Decoder) ==
2461  MCDisassembler::Fail)
2462  return MCDisassembler::Fail;
2463 
2464  unsigned RegRs;
2465  if (static_cast<const MipsDisassembler*>(Decoder)->hasMips32r6())
2466  RegRs = fieldFromInstruction(Insn, 0, 2) |
2467  (fieldFromInstruction(Insn, 3, 1) << 2);
2468  else
2469  RegRs = fieldFromInstruction(Insn, 1, 3);
2470  if (DecodeGPRMM16MovePRegisterClass(Inst, RegRs, Address, Decoder) ==
2471  MCDisassembler::Fail)
2472  return MCDisassembler::Fail;
2473 
2474  unsigned RegRt = fieldFromInstruction(Insn, 4, 3);
2475  if (DecodeGPRMM16MovePRegisterClass(Inst, RegRt, Address, Decoder) ==
2476  MCDisassembler::Fail)
2477  return MCDisassembler::Fail;
2478 
2479  return MCDisassembler::Success;
2480 }
2481 
2482 static DecodeStatus DecodeMovePRegPair(MCInst &Inst, unsigned RegPair,
2483  uint64_t Address, const void *Decoder) {
2484  switch (RegPair) {
2485  default:
2486  return MCDisassembler::Fail;
2487  case 0:
2488  Inst.addOperand(MCOperand::createReg(Mips::A1));
2489  Inst.addOperand(MCOperand::createReg(Mips::A2));
2490  break;
2491  case 1:
2492  Inst.addOperand(MCOperand::createReg(Mips::A1));
2493  Inst.addOperand(MCOperand::createReg(Mips::A3));
2494  break;
2495  case 2:
2496  Inst.addOperand(MCOperand::createReg(Mips::A2));
2497  Inst.addOperand(MCOperand::createReg(Mips::A3));
2498  break;
2499  case 3:
2500  Inst.addOperand(MCOperand::createReg(Mips::A0));
2501  Inst.addOperand(MCOperand::createReg(Mips::S5));
2502  break;
2503  case 4:
2504  Inst.addOperand(MCOperand::createReg(Mips::A0));
2505  Inst.addOperand(MCOperand::createReg(Mips::S6));
2506  break;
2507  case 5:
2508  Inst.addOperand(MCOperand::createReg(Mips::A0));
2509  Inst.addOperand(MCOperand::createReg(Mips::A1));
2510  break;
2511  case 6:
2512  Inst.addOperand(MCOperand::createReg(Mips::A0));
2513  Inst.addOperand(MCOperand::createReg(Mips::A2));
2514  break;
2515  case 7:
2516  Inst.addOperand(MCOperand::createReg(Mips::A0));
2517  Inst.addOperand(MCOperand::createReg(Mips::A3));
2518  break;
2519  }
2520 
2521  return MCDisassembler::Success;
2522 }
2523 
2524 static DecodeStatus DecodeSimm23Lsl2(MCInst &Inst, unsigned Insn,
2525  uint64_t Address, const void *Decoder) {
2526  Inst.addOperand(MCOperand::createImm(SignExtend32<25>(Insn << 2)));
2527  return MCDisassembler::Success;
2528 }
2529 
2530 template <typename InsnType>
2531 static DecodeStatus DecodeBgtzGroupBranchMMR6(MCInst &MI, InsnType insn,
2532  uint64_t Address,
2533  const void *Decoder) {
2534  // We have:
2535  // 0b000111 ttttt sssss iiiiiiiiiiiiiiii
2536  // Invalid if rt == 0
2537  // BGTZALC_MMR6 if rs == 0 && rt != 0
2538  // BLTZALC_MMR6 if rs != 0 && rs == rt
2539  // BLTUC_MMR6 if rs != 0 && rs != rt
2540 
2541  InsnType Rt = fieldFromInstruction(insn, 21, 5);
2542  InsnType Rs = fieldFromInstruction(insn, 16, 5);
2543  InsnType Imm = 0;
2544  bool HasRs = false;
2545  bool HasRt = false;
2546 
2547  if (Rt == 0)
2548  return MCDisassembler::Fail;
2549  else if (Rs == 0) {
2550  MI.setOpcode(Mips::BGTZALC_MMR6);
2551  HasRt = true;
2552  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
2553  }
2554  else if (Rs == Rt) {
2555  MI.setOpcode(Mips::BLTZALC_MMR6);
2556  HasRs = true;
2557  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
2558  }
2559  else {
2560  MI.setOpcode(Mips::BLTUC_MMR6);
2561  HasRs = true;
2562  HasRt = true;
2563  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
2564  }
2565 
2566  if (HasRs)
2567  MI.addOperand(
2568  MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID, Rs)));
2569 
2570  if (HasRt)
2571  MI.addOperand(
2572  MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID, Rt)));
2573 
2574  MI.addOperand(MCOperand::createImm(Imm));
2575 
2576  return MCDisassembler::Success;
2577 }
2578 
2579 template <typename InsnType>
2580 static DecodeStatus DecodeBlezGroupBranchMMR6(MCInst &MI, InsnType insn,
2581  uint64_t Address,
2582  const void *Decoder) {
2583  // We have:
2584  // 0b000110 ttttt sssss iiiiiiiiiiiiiiii
2585  // Invalid if rt == 0
2586  // BLEZALC_MMR6 if rs == 0 && rt != 0
2587  // BGEZALC_MMR6 if rs == rt && rt != 0
2588  // BGEUC_MMR6 if rs != rt && rs != 0 && rt != 0
2589 
2590  InsnType Rt = fieldFromInstruction(insn, 21, 5);
2591  InsnType Rs = fieldFromInstruction(insn, 16, 5);
2592  InsnType Imm = 0;
2593  bool HasRs = false;
2594 
2595  if (Rt == 0)
2596  return MCDisassembler::Fail;
2597  else if (Rs == 0) {
2598  MI.setOpcode(Mips::BLEZALC_MMR6);
2599  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
2600  }
2601  else if (Rs == Rt) {
2602  MI.setOpcode(Mips::BGEZALC_MMR6);
2603  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
2604  }
2605  else {
2606  HasRs = true;
2607  MI.setOpcode(Mips::BGEUC_MMR6);
2608  Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
2609  }
2610 
2611  if (HasRs)
2612  MI.addOperand(
2613  MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID, Rs)));
2614  MI.addOperand(
2615  MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID, Rt)));
2616 
2617  MI.addOperand(MCOperand::createImm(Imm));
2618 
2619  return MCDisassembler::Success;
2620 }
DecodeCacheOp
static DecodeStatus DecodeCacheOp(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1583
DecodeJumpTargetMM
static DecodeStatus DecodeJumpTargetMM(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2294
DecodeLi16Imm
static DecodeStatus DecodeLi16Imm(MCInst &Inst, unsigned Value, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2316
DecodeFMemCop2MMR6
static DecodeStatus DecodeFMemCop2MMR6(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2019
DecodeBranchTarget21
static DecodeStatus DecodeBranchTarget21(MCInst &Inst, unsigned Offset, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2227
llvm::MCRegisterClass::begin
iterator begin() const
begin/end - Return all of the registers in this class.
Definition: MCRegisterInfo.h:53
llvm
This class represents lattice values for constants.
Definition: AllocatorList.h:24
DecodeINSVE_DF
static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
INSVE_[BHWD] have an implicit operand that the generated decoder doesn&#39;t handle.
Definition: MipsDisassembler.cpp:588
LLVM_FALLTHROUGH
#define LLVM_FALLTHROUGH
Definition: Compiler.h:86
llvm::MCDisassembler::DecodeStatus
DecodeStatus
Ternary decode status.
Definition: MCDisassembler.h:51
DecodeCPU16RegsRegisterClass
static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1385
DecodeCOP2RegisterClass
static DecodeStatus DecodeCOP2RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2188
llvm::MCDisassembler
Superclass for all disassemblers.
Definition: MCDisassembler.h:27
DecodeFMemCop2R6
static DecodeStatus DecodeFMemCop2R6(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2001
DecodeBranchTarget
static DecodeStatus DecodeBranchTarget(MCInst &Inst, unsigned Offset, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2200
DecodeBgtzGroupBranchMMR6
static DecodeStatus DecodeBgtzGroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2531
DecodeSyncI
static DecodeStatus DecodeSyncI(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1651
DecodeGPR64RegisterClass
static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1392
Reg
unsigned Reg
Definition: MachineSink.cpp:979
DecodeInsSize
static DecodeStatus DecodeInsSize(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2354
DecodeDaddiGroupBranch
static DecodeStatus DecodeDaddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:736
DecodeBranchTargetMM
static DecodeStatus DecodeBranchTargetMM(MCInst &Inst, unsigned Offset, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2275
llvm::getTheMipselTarget
Target & getTheMipselTarget()
Definition: MipsTargetInfo.cpp:19
DecodeAFGR64RegisterClass
static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2068
DecodeSimm19Lsl2
static DecodeStatus DecodeSimm19Lsl2(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2367
DecodeFCCRegisterClass
static DecodeStatus DecodeFCCRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1500
createMipsDisassembler
static MCDisassembler * createMipsDisassembler(const Target &T, const MCSubtargetInfo &STI, MCContext &Ctx)
Definition: MipsDisassembler.cpp:553
llvm::TargetRegistry::RegisterMCDisassembler
static void RegisterMCDisassembler(Target &T, Target::MCDisassemblerCtorTy Fn)
RegisterMCDisassembler - Register a MCDisassembler implementation for the given target.
Definition: TargetRegistry.h:808
DecodeBlezlGroupBranch
static DecodeStatus DecodeBlezlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:887
DecodeFMemMMR2
static DecodeStatus DecodeFMemMMR2(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1947
DecodeMSA128Mem
static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1694
DecodeMemMMImm4
static DecodeStatus DecodeMemMMImm4(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1740
RA
SI optimize exec mask operations pre RA
Definition: SIOptimizeExecMaskingPreRA.cpp:63
DecodeSImmWithOffsetAndScale
static DecodeStatus DecodeSImmWithOffsetAndScale(MCInst &Inst, unsigned Value, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2346
DecodeGPR32RegisterClass
static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1437
DecodePOP75GroupBranchMMR6
static DecodeStatus DecodePOP75GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:848
DecodeRegListOperand16
static DecodeStatus DecodeRegListOperand16(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2432
DecodeMemMMReglistImm4Lsl2
static DecodeStatus DecodeMemMMReglistImm4Lsl2(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1830
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static MCOperand createReg(unsigned Reg)
Definition: MCInst.h:116
llvm::MCSubtargetInfo::getFeatureBits
const FeatureBitset & getFeatureBits() const
Definition: MCSubtargetInfo.h:71
DecodeDAHIDATIMMR6
static DecodeStatus DecodeDAHIDATIMMR6(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:635
DecodeFMem
static DecodeStatus DecodeFMem(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1929
DecodeMemMMSPImm5Lsl2
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Definition: MipsDisassembler.cpp:1798
DecodeLO32DSPRegisterClass
static DecodeStatus DecodeLO32DSPRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2104
DecodePOP65GroupBranchMMR6
static DecodeStatus DecodePOP65GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:809
DecodeMSA128DRegisterClass
static DecodeStatus DecodeMSA128DRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2152
DecodeSyncI_MM
static DecodeStatus DecodeSyncI_MM(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1666
llvm::MCContext
Context object for machine code objects.
Definition: MCContext.h:63
DecodeDEXT
static DecodeStatus DecodeDEXT(MCInst &MI, InsnType Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1067
DecodeMemMMImm12
static DecodeStatus DecodeMemMMImm12(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1876
DecodeCacheeOp_CacheOpR6
static DecodeStatus DecodeCacheeOp_CacheOpR6(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1634
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
DecodeUImmWithOffsetAndScale
static DecodeStatus DecodeUImmWithOffsetAndScale(MCInst &Inst, unsigned Value, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2336
llvm::getTheMips64Target
Target & getTheMips64Target()
Definition: MipsTargetInfo.cpp:23
DecodeRegListOperand
static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2403
DecodeMovePRegPair
static DecodeStatus DecodeMovePRegPair(MCInst &Inst, unsigned RegPair, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2482
DecodeHWRegsRegisterClass
static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2057
DecodeBlezGroupBranchMMR6
static DecodeStatus DecodeBlezGroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2580
llvm::MCInst
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:161
DecodePOP35GroupBranchMMR6
static DecodeStatus DecodePOP35GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:702
llvm::MCRegisterInfo
MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc object...
Definition: MCRegisterInfo.h:129
DecodeMemMMImm9
static DecodeStatus DecodeMemMMImm9(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1855
llvm::MCOperand::getImm
int64_t getImm() const
Definition: MCInst.h:76
DecodeGPRMM16RegisterClass
static DecodeStatus DecodeGPRMM16RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1404
createMipselDisassembler
static MCDisassembler * createMipselDisassembler(const Target &T, const MCSubtargetInfo &STI, MCContext &Ctx)
Definition: MipsDisassembler.cpp:560
DecodePOP37GroupBranchMMR6
static DecodeStatus DecodePOP37GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:775
llvm::getTheMips64elTarget
Target & getTheMips64elTarget()
Definition: MipsTargetInfo.cpp:27
DecodeBgtzlGroupBranch
static DecodeStatus DecodeBgtzlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:930
DecodeSimm18Lsl3
static DecodeStatus DecodeSimm18Lsl3(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2373
llvm::ArrayRef::size
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:149
DecodeFGR64RegisterClass
static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1465
LLVMInitializeMipsDisassembler
void LLVMInitializeMipsDisassembler()
Definition: MipsDisassembler.cpp:567
DecodePtrRegisterClass
static DecodeStatus DecodePtrRegisterClass(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1448
DecodeSimm23Lsl2
static DecodeStatus DecodeSimm23Lsl2(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2524
DecodeDINS
static DecodeStatus DecodeDINS(MCInst &MI, InsnType Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1107
DecodeCacheOpMM
static DecodeStatus DecodeCacheOpMM(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1600
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:136
DecodeBranchTarget7MM
static DecodeStatus DecodeBranchTarget7MM(MCInst &Inst, unsigned Offset, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2257
DecodeDAHIDATI
static DecodeStatus DecodeDAHIDATI(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:649
uint32_t
DecodeStatus
MCDisassembler::DecodeStatus DecodeStatus
Definition: MipsDisassembler.cpp:36
llvm::MCInst::setOpcode
void setOpcode(unsigned Op)
Definition: MCInst.h:173
DecodeSpecial3LlSc
static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2035
readInstruction16
static DecodeStatus readInstruction16(ArrayRef< uint8_t > Bytes, uint64_t Address, uint64_t &Size, uint32_t &Insn, bool IsBigEndian)
Read two bytes from the ArrayRef and return 16 bit halfword sorted according to the given endianness...
Definition: MipsDisassembler.cpp:1162
DecodeBranchTarget26MM
static DecodeStatus DecodeBranchTarget26MM(MCInst &Inst, unsigned Offset, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2284
DecodeMemEVA
static DecodeStatus DecodeMemEVA(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1544
llvm::MCInst::getOperand
const MCOperand & getOperand(unsigned i) const
Definition: MCInst.h:182
DecodeMSA128BRegisterClass
static DecodeStatus DecodeMSA128BRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2116
DecodeSynciR6
static DecodeStatus DecodeSynciR6(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1679
DecodeMem
static DecodeStatus DecodeMem(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1522
llvm::PPCISD::SC
CHAIN = SC CHAIN, Imm128 - System call.
Definition: PPCISelLowering.h:354
DecodeACC64DSPRegisterClass
static DecodeStatus DecodeACC64DSPRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2080
D
static GCRegistry::Add< StatepointGC > D("statepoint-example", "an example strategy for statepoint")
llvm::dbgs
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:133
llvm::Target
Target - Wrapper for Target specific information.
Definition: TargetRegistry.h:120
DecodeCOP0RegisterClass
static DecodeStatus DecodeCOP0RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2176
getReg
static unsigned getReg(const void *D, unsigned RC, unsigned RegNo)
Definition: MipsDisassembler.cpp:581
DecodePOOL16BEncodedField
static DecodeStatus DecodePOOL16BEncodedField(MCInst &Inst, unsigned Value, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2327
DecodeFGR32RegisterClass
static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1477
llvm::getTheMipsTarget
Target & getTheMipsTarget()
Definition: MipsTargetInfo.cpp:15
DecodeGPRMM16ZeroRegisterClass
static DecodeStatus DecodeGPRMM16ZeroRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1415
DecodeCCRRegisterClass
static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1489
DecodeBgtzGroupBranch
static DecodeStatus DecodeBgtzGroupBranch(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:974
DecodeBranchTarget10MM
static DecodeStatus DecodeBranchTarget10MM(MCInst &Inst, unsigned Offset, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2266
DecodeMSA128WRegisterClass
static DecodeStatus DecodeMSA128WRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2140
DecodeANDI16Imm
static DecodeStatus DecodeANDI16Imm(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2393
DecodeFMem2
static DecodeStatus DecodeFMem2(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1965
DecodeBranchTarget1SImm16
static DecodeStatus DecodeBranchTarget1SImm16(MCInst &Inst, unsigned Offset, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2209
DecodeBranchTarget21MM
static DecodeStatus DecodeBranchTarget21MM(MCInst &Inst, unsigned Offset, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2237
llvm::MCSubtargetInfo
Generic base class for all target subtargets.
Definition: MCSubtargetInfo.h:36
Size
uint32_t Size
Definition: Profile.cpp:47
llvm::SignExtend64
constexpr int64_t SignExtend64(uint64_t x)
Sign-extend the number in the bottom B bits of X to a 64-bit integer.
Definition: MathExtras.h:749
DecodeBranchTarget26
static DecodeStatus DecodeBranchTarget26(MCInst &Inst, unsigned Offset, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2247
DecodeCRC
static DecodeStatus DecodeCRC(MCInst &MI, InsnType Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1147
DecodeAddiGroupBranch
static DecodeStatus DecodeAddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:663
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
DecodeGPRMM16MovePRegisterClass
static DecodeStatus DecodeGPRMM16MovePRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1426
DecodePrefeOpMM
static DecodeStatus DecodePrefeOpMM(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1617
llvm::Value
LLVM Value Representation.
Definition: Value.h:73
DecodeFGRCCRegisterClass
static DecodeStatus DecodeFGRCCRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1511
DecodeMovePOperands
static DecodeStatus DecodeMovePOperands(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2456
DecodeHI32DSPRegisterClass
static DecodeStatus DecodeHI32DSPRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2092
DecodeJumpTarget
static DecodeStatus DecodeJumpTarget(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2218
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:46
MI
IRTranslator LLVM IR MI
Definition: IRTranslator.cpp:89
DecodeSimm9SP
static DecodeStatus DecodeSimm9SP(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2379
llvm::MCInst::addOperand
void addOperand(const MCOperand &Op)
Definition: MCInst.h:186
raw_ostream.h
DecodeMemMMGPImm7Lsl2
static DecodeStatus DecodeMemMMGPImm7Lsl2(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1814
llvm::MCInst::getOpcode
unsigned getOpcode() const
Definition: MCInst.h:174
readInstruction32
static DecodeStatus readInstruction32(ArrayRef< uint8_t > Bytes, uint64_t Address, uint64_t &Size, uint32_t &Insn, bool IsBigEndian, bool IsMicroMips)
Read four bytes from the ArrayRef and return 32 bit word sorted according to the given endianness...
Definition: MipsDisassembler.cpp:1182
DecodeMSACtrlRegisterClass
static DecodeStatus DecodeMSACtrlRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2164
LLVM_DEBUG
#define LLVM_DEBUG(X)
Definition: Debug.h:123
DecodeAddiur2Simm7
static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst, unsigned Value, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2303
DecodeMSA128HRegisterClass
static DecodeStatus DecodeMSA128HRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:2128
llvm::MCOperand::createImm
static MCOperand createImm(int64_t Val)
Definition: MCInst.h:123
DecodeFMem3
static DecodeStatus DecodeFMem3(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1983
DecodeDSPRRegisterClass
static DecodeStatus DecodeDSPRRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1458
llvm::MCRegisterInfo::getRegClass
const MCRegisterClass & getRegClass(unsigned i) const
Returns the register class associated with the enumeration value.
Definition: MCRegisterInfo.h:433
DecodeMemMMImm16
static DecodeStatus DecodeMemMMImm16(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1911
DecodeBlezGroupBranch
static DecodeStatus DecodeBlezGroupBranch(MCInst &MI, InsnType insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1023
DecodeUImmWithOffset
static DecodeStatus DecodeUImmWithOffset(MCInst &Inst, unsigned Value, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:403
DecodeLoadByte15
static DecodeStatus DecodeLoadByte15(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder)
Definition: MipsDisassembler.cpp:1565
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