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[InstCombine] Signed saturation patterns
[llvm-complete.git] / lib / Target / Mips / Disassembler / MipsDisassembler.cpp
blobc3e98fe410c1efa178f9f88c388f4ac41b091c14
1 //===- MipsDisassembler.cpp - Disassembler for Mips -----------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file is part of the Mips Disassembler.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "MCTargetDesc/MipsMCTargetDesc.h"
14 #include "Mips.h"
15 #include "TargetInfo/MipsTargetInfo.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 // DecodeJumpTargetXMM - Decode microMIPS jump and link exchange target,
271 // which is shifted left by 2 bit.
272 static DecodeStatus DecodeJumpTargetXMM(MCInst &Inst,
273 unsigned Insn,
274 uint64_t Address,
275 const void *Decoder);
276
277 static DecodeStatus DecodeMem(MCInst &Inst,
278 unsigned Insn,
279 uint64_t Address,
280 const void *Decoder);
281
282 static DecodeStatus DecodeMemEVA(MCInst &Inst,
283 unsigned Insn,
284 uint64_t Address,
285 const void *Decoder);
286
287 static DecodeStatus DecodeLoadByte15(MCInst &Inst,
288 unsigned Insn,
289 uint64_t Address,
290 const void *Decoder);
291
292 static DecodeStatus DecodeCacheOp(MCInst &Inst, unsigned Insn, uint64_t Address,
293 const void *Decoder);
294
295 static DecodeStatus DecodeCacheeOp_CacheOpR6(MCInst &Inst,
296 unsigned Insn,
297 uint64_t Address,
298 const void *Decoder);
299
300 static DecodeStatus DecodeCacheOpMM(MCInst &Inst,
301 unsigned Insn,
302 uint64_t Address,
303 const void *Decoder);
304
305 static DecodeStatus DecodePrefeOpMM(MCInst &Inst,
306 unsigned Insn,
307 uint64_t Address,
308 const void *Decoder);
309
310 static DecodeStatus DecodeSyncI(MCInst &Inst,
311 unsigned Insn,
312 uint64_t Address,
313 const void *Decoder);
314
315 static DecodeStatus DecodeSyncI_MM(MCInst &Inst,
316 unsigned Insn,
317 uint64_t Address,
318 const void *Decoder);
319
320 static DecodeStatus DecodeSynciR6(MCInst &Inst,
321 unsigned Insn,
322 uint64_t Address,
323 const void *Decoder);
324
325 static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn,
326 uint64_t Address, const void *Decoder);
327
328 static DecodeStatus DecodeMemMMImm4(MCInst &Inst,
329 unsigned Insn,
330 uint64_t Address,
331 const void *Decoder);
332
333 static DecodeStatus DecodeMemMMSPImm5Lsl2(MCInst &Inst,
334 unsigned Insn,
335 uint64_t Address,
336 const void *Decoder);
337
338 static DecodeStatus DecodeMemMMGPImm7Lsl2(MCInst &Inst,
339 unsigned Insn,
340 uint64_t Address,
341 const void *Decoder);
342
343 static DecodeStatus DecodeMemMMReglistImm4Lsl2(MCInst &Inst,
344 unsigned Insn,
345 uint64_t Address,
346 const void *Decoder);
347
348 static DecodeStatus DecodeMemMMImm9(MCInst &Inst,
349 unsigned Insn,
350 uint64_t Address,
351 const void *Decoder);
352
353 static DecodeStatus DecodeMemMMImm12(MCInst &Inst,
354 unsigned Insn,
355 uint64_t Address,
356 const void *Decoder);
357
358 static DecodeStatus DecodeMemMMImm16(MCInst &Inst,
359 unsigned Insn,
360 uint64_t Address,
361 const void *Decoder);
362
363 static DecodeStatus DecodeFMem(MCInst &Inst, unsigned Insn,
364 uint64_t Address,
365 const void *Decoder);
366
367 static DecodeStatus DecodeFMemMMR2(MCInst &Inst, unsigned Insn,
368 uint64_t Address,
369 const void *Decoder);
370
371 static DecodeStatus DecodeFMem2(MCInst &Inst, unsigned Insn, uint64_t Address,
372 const void *Decoder);
373
374 static DecodeStatus DecodeFMem3(MCInst &Inst, unsigned Insn, uint64_t Address,
375 const void *Decoder);
376
377 static DecodeStatus DecodeFMemCop2R6(MCInst &Inst, unsigned Insn,
378 uint64_t Address, const void *Decoder);
379
380 static DecodeStatus DecodeFMemCop2MMR6(MCInst &Inst, unsigned Insn,
381 uint64_t Address,
382 const void *Decoder);
383
384 static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst,
385 unsigned Insn,
386 uint64_t Address,
387 const void *Decoder);
388
389 static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
390 unsigned Value,
391 uint64_t Address,
392 const void *Decoder);
393
394 static DecodeStatus DecodeLi16Imm(MCInst &Inst,
395 unsigned Value,
396 uint64_t Address,
397 const void *Decoder);
398
399 static DecodeStatus DecodePOOL16BEncodedField(MCInst &Inst,
400 unsigned Value,
401 uint64_t Address,
402 const void *Decoder);
403
404 template <unsigned Bits, int Offset, int Scale>
405 static DecodeStatus DecodeUImmWithOffsetAndScale(MCInst &Inst, unsigned Value,
406 uint64_t Address,
407 const void *Decoder);
408
409 template <unsigned Bits, int Offset>
410 static DecodeStatus DecodeUImmWithOffset(MCInst &Inst, unsigned Value,
411 uint64_t Address,
412 const void *Decoder) {
413 return DecodeUImmWithOffsetAndScale<Bits, Offset, 1>(Inst, Value, Address,
414 Decoder);
415 }
416
417 template <unsigned Bits, int Offset = 0, int ScaleBy = 1>
418 static DecodeStatus DecodeSImmWithOffsetAndScale(MCInst &Inst, unsigned Value,
419 uint64_t Address,
420 const void *Decoder);
421
422 static DecodeStatus DecodeInsSize(MCInst &Inst,
423 unsigned Insn,
424 uint64_t Address,
425 const void *Decoder);
426
427 static DecodeStatus DecodeSimm19Lsl2(MCInst &Inst, unsigned Insn,
428 uint64_t Address, const void *Decoder);
429
430 static DecodeStatus DecodeSimm18Lsl3(MCInst &Inst, unsigned Insn,
431 uint64_t Address, const void *Decoder);
432
433 static DecodeStatus DecodeSimm9SP(MCInst &Inst, unsigned Insn,
434 uint64_t Address, const void *Decoder);
435
436 static DecodeStatus DecodeANDI16Imm(MCInst &Inst, unsigned Insn,
437 uint64_t Address, const void *Decoder);
438
439 static DecodeStatus DecodeSimm23Lsl2(MCInst &Inst, unsigned Insn,
440 uint64_t Address, const void *Decoder);
441
442 /// INSVE_[BHWD] have an implicit operand that the generated decoder doesn't
443 /// handle.
444 template <typename InsnType>
445 static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address,
446 const void *Decoder);
447
448 template <typename InsnType>
449 static DecodeStatus DecodeDAHIDATIMMR6(MCInst &MI, InsnType insn, uint64_t Address,
450 const void *Decoder);
451
452 template <typename InsnType>
453 static DecodeStatus DecodeDAHIDATI(MCInst &MI, InsnType insn, uint64_t Address,
454 const void *Decoder);
455
456 template <typename InsnType>
457 static DecodeStatus DecodeDAHIDATIMMR6(MCInst &MI, InsnType insn, uint64_t Address,
458 const void *Decoder);
459
460 template <typename InsnType>
461 static DecodeStatus DecodeDAHIDATI(MCInst &MI, InsnType insn, uint64_t Address,
462 const void *Decoder);
463
464 template <typename InsnType>
465 static DecodeStatus
466 DecodeAddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
467 const void *Decoder);
468
469 template <typename InsnType>
470 static DecodeStatus
471 DecodePOP35GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
472 const void *Decoder);
473
474 template <typename InsnType>
475 static DecodeStatus
476 DecodeDaddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
477 const void *Decoder);
478
479 template <typename InsnType>
480 static DecodeStatus
481 DecodePOP37GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
482 const void *Decoder);
483
484 template <typename InsnType>
485 static DecodeStatus
486 DecodePOP65GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
487 const void *Decoder);
488
489 template <typename InsnType>
490 static DecodeStatus
491 DecodePOP75GroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
492 const void *Decoder);
493
494 template <typename InsnType>
495 static DecodeStatus
496 DecodeBlezlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
497 const void *Decoder);
498
499 template <typename InsnType>
500 static DecodeStatus
501 DecodeBgtzlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
502 const void *Decoder);
503
504 template <typename InsnType>
505 static DecodeStatus
506 DecodeBgtzGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
507 const void *Decoder);
508
509 template <typename InsnType>
510 static DecodeStatus
511 DecodeBlezGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
512 const void *Decoder);
513
514 template <typename InsnType>
515 static DecodeStatus
516 DecodeBgtzGroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
517 const void *Decoder);
518
519 template <typename InsnType>
520 static DecodeStatus
521 DecodeBlezGroupBranchMMR6(MCInst &MI, InsnType insn, uint64_t Address,
522 const void *Decoder);
523
524 template <typename InsnType>
525 static DecodeStatus DecodeDINS(MCInst &MI, InsnType Insn, uint64_t Address,
526 const void *Decoder);
527
528 template <typename InsnType>
529 static DecodeStatus DecodeDEXT(MCInst &MI, InsnType Insn, uint64_t Address,
530 const void *Decoder);
531
532 template <typename InsnType>
533 static DecodeStatus DecodeCRC(MCInst &MI, InsnType Insn, uint64_t Address,
534 const void *Decoder);
535
536 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Insn,
537 uint64_t Address,
538 const void *Decoder);
539
540 static DecodeStatus DecodeRegListOperand16(MCInst &Inst, unsigned Insn,
541 uint64_t Address,
542 const void *Decoder);
543
544 static DecodeStatus DecodeMovePRegPair(MCInst &Inst, unsigned RegPair,
545 uint64_t Address,
546 const void *Decoder);
547
548 static DecodeStatus DecodeMovePOperands(MCInst &Inst, unsigned Insn,
549 uint64_t Address, const void *Decoder);
550
551 static MCDisassembler *createMipsDisassembler(
552 const Target &T,
553 const MCSubtargetInfo &STI,
554 MCContext &Ctx) {
555 return new MipsDisassembler(STI, Ctx, true);
556 }
557
558 static MCDisassembler *createMipselDisassembler(
559 const Target &T,
560 const MCSubtargetInfo &STI,
561 MCContext &Ctx) {
562 return new MipsDisassembler(STI, Ctx, false);
563 }
564
565 extern "C" void LLVMInitializeMipsDisassembler() {
566 // Register the disassembler.
567 TargetRegistry::RegisterMCDisassembler(getTheMipsTarget(),
568 createMipsDisassembler);
569 TargetRegistry::RegisterMCDisassembler(getTheMipselTarget(),
570 createMipselDisassembler);
571 TargetRegistry::RegisterMCDisassembler(getTheMips64Target(),
572 createMipsDisassembler);
573 TargetRegistry::RegisterMCDisassembler(getTheMips64elTarget(),
574 createMipselDisassembler);
575 }
576
577 #include "MipsGenDisassemblerTables.inc"
578
579 static unsigned getReg(const void *D, unsigned RC, unsigned RegNo) {
580 const MipsDisassembler *Dis = static_cast<const MipsDisassembler*>(D);
581 const MCRegisterInfo *RegInfo = Dis->getContext().getRegisterInfo();
582 return *(RegInfo->getRegClass(RC).begin() + RegNo);
583 }
584
585 template <typename InsnType>
586 static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address,
587 const void *Decoder) {
588 using DecodeFN = DecodeStatus (*)(MCInst &, unsigned, uint64_t, const void *);
589
590 // The size of the n field depends on the element size
591 // The register class also depends on this.
592 InsnType tmp = fieldFromInstruction(insn, 17, 5);
593 unsigned NSize = 0;
594 DecodeFN RegDecoder = nullptr;
595 if ((tmp & 0x18) == 0x00) { // INSVE_B
596 NSize = 4;
597 RegDecoder = DecodeMSA128BRegisterClass;
598 } else if ((tmp & 0x1c) == 0x10) { // INSVE_H
599 NSize = 3;
600 RegDecoder = DecodeMSA128HRegisterClass;
601 } else if ((tmp & 0x1e) == 0x18) { // INSVE_W
602 NSize = 2;
603 RegDecoder = DecodeMSA128WRegisterClass;
604 } else if ((tmp & 0x1f) == 0x1c) { // INSVE_D
605 NSize = 1;
606 RegDecoder = DecodeMSA128DRegisterClass;
607 } else
608 llvm_unreachable("Invalid encoding");
609
610 assert(NSize != 0 && RegDecoder != nullptr);
611
612 // $wd
613 tmp = fieldFromInstruction(insn, 6, 5);
614 if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
615 return MCDisassembler::Fail;
616 // $wd_in
617 if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
618 return MCDisassembler::Fail;
619 // $n
620 tmp = fieldFromInstruction(insn, 16, NSize);
621 MI.addOperand(MCOperand::createImm(tmp));
622 // $ws
623 tmp = fieldFromInstruction(insn, 11, 5);
624 if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
625 return MCDisassembler::Fail;
626 // $n2
627 MI.addOperand(MCOperand::createImm(0));
628
629 return MCDisassembler::Success;
630 }
631
632 template <typename InsnType>
633 static DecodeStatus DecodeDAHIDATIMMR6(MCInst &MI, InsnType insn, uint64_t Address,
634 const void *Decoder) {
635 InsnType Rs = fieldFromInstruction(insn, 16, 5);
636 InsnType Imm = fieldFromInstruction(insn, 0, 16);
637 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID,
638 Rs)));
639 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID,
640 Rs)));
641 MI.addOperand(MCOperand::createImm(Imm));
642
643 return MCDisassembler::Success;
644 }
645
646 template <typename InsnType>
647 static DecodeStatus DecodeDAHIDATI(MCInst &MI, InsnType insn, uint64_t Address,
648 const void *Decoder) {
649 InsnType Rs = fieldFromInstruction(insn, 21, 5);
650 InsnType Imm = fieldFromInstruction(insn, 0, 16);
651 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID,
652 Rs)));
653 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID,
654 Rs)));
655 MI.addOperand(MCOperand::createImm(Imm));
656
657 return MCDisassembler::Success;
658 }
659
660 template <typename InsnType>
661 static DecodeStatus DecodeAddiGroupBranch(MCInst &MI, InsnType insn,
662 uint64_t Address,
663 const void *Decoder) {
664 // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
665 // (otherwise we would have matched the ADDI instruction from the earlier
666 // ISA's instead).
667 //
668 // We have:
669 // 0b001000 sssss ttttt iiiiiiiiiiiiiiii
670 // BOVC if rs >= rt
671 // BEQZALC if rs == 0 && rt != 0
672 // BEQC if rs < rt && rs != 0
673
674 InsnType Rs = fieldFromInstruction(insn, 21, 5);
675 InsnType Rt = fieldFromInstruction(insn, 16, 5);
676 int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
677 bool HasRs = false;
678
679 if (Rs >= Rt) {
680 MI.setOpcode(Mips::BOVC);
681 HasRs = true;
682 } else if (Rs != 0 && Rs < Rt) {
683 MI.setOpcode(Mips::BEQC);
684 HasRs = true;
685 } else
686 MI.setOpcode(Mips::BEQZALC);
687
688 if (HasRs)
689 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
690 Rs)));
691
692 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
693 Rt)));
694 MI.addOperand(MCOperand::createImm(Imm));
695
696 return MCDisassembler::Success;
697 }
698
699 template <typename InsnType>
700 static DecodeStatus DecodePOP35GroupBranchMMR6(MCInst &MI, InsnType insn,
701 uint64_t Address,
702 const void *Decoder) {
703 InsnType Rt = fieldFromInstruction(insn, 21, 5);
704 InsnType Rs = fieldFromInstruction(insn, 16, 5);
705 int64_t Imm = 0;
706
707 if (Rs >= Rt) {
708 MI.setOpcode(Mips::BOVC_MMR6);
709 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
710 Rt)));
711 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
712 Rs)));
713 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
714 } else if (Rs != 0 && Rs < Rt) {
715 MI.setOpcode(Mips::BEQC_MMR6);
716 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
717 Rs)));
718 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
719 Rt)));
720 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
721 } else {
722 MI.setOpcode(Mips::BEQZALC_MMR6);
723 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
724 Rt)));
725 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
726 }
727
728 MI.addOperand(MCOperand::createImm(Imm));
729
730 return MCDisassembler::Success;
731 }
732
733 template <typename InsnType>
734 static DecodeStatus DecodeDaddiGroupBranch(MCInst &MI, InsnType insn,
735 uint64_t Address,
736 const void *Decoder) {
737 // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
738 // (otherwise we would have matched the ADDI instruction from the earlier
739 // ISA's instead).
740 //
741 // We have:
742 // 0b011000 sssss ttttt iiiiiiiiiiiiiiii
743 // BNVC if rs >= rt
744 // BNEZALC if rs == 0 && rt != 0
745 // BNEC if rs < rt && rs != 0
746
747 InsnType Rs = fieldFromInstruction(insn, 21, 5);
748 InsnType Rt = fieldFromInstruction(insn, 16, 5);
749 int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
750 bool HasRs = false;
751
752 if (Rs >= Rt) {
753 MI.setOpcode(Mips::BNVC);
754 HasRs = true;
755 } else if (Rs != 0 && Rs < Rt) {
756 MI.setOpcode(Mips::BNEC);
757 HasRs = true;
758 } else
759 MI.setOpcode(Mips::BNEZALC);
760
761 if (HasRs)
762 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
763 Rs)));
764
765 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
766 Rt)));
767 MI.addOperand(MCOperand::createImm(Imm));
768
769 return MCDisassembler::Success;
770 }
771
772 template <typename InsnType>
773 static DecodeStatus DecodePOP37GroupBranchMMR6(MCInst &MI, InsnType insn,
774 uint64_t Address,
775 const void *Decoder) {
776 InsnType Rt = fieldFromInstruction(insn, 21, 5);
777 InsnType Rs = fieldFromInstruction(insn, 16, 5);
778 int64_t Imm = 0;
779
780 if (Rs >= Rt) {
781 MI.setOpcode(Mips::BNVC_MMR6);
782 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
783 Rt)));
784 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
785 Rs)));
786 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
787 } else if (Rs != 0 && Rs < Rt) {
788 MI.setOpcode(Mips::BNEC_MMR6);
789 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
790 Rs)));
791 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
792 Rt)));
793 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
794 } else {
795 MI.setOpcode(Mips::BNEZALC_MMR6);
796 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
797 Rt)));
798 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
799 }
800
801 MI.addOperand(MCOperand::createImm(Imm));
802
803 return MCDisassembler::Success;
804 }
805
806 template <typename InsnType>
807 static DecodeStatus DecodePOP65GroupBranchMMR6(MCInst &MI, InsnType insn,
808 uint64_t Address,
809 const void *Decoder) {
810 // We have:
811 // 0b110101 ttttt sssss iiiiiiiiiiiiiiii
812 // Invalid if rt == 0
813 // BGTZC_MMR6 if rs == 0 && rt != 0
814 // BLTZC_MMR6 if rs == rt && rt != 0
815 // BLTC_MMR6 if rs != rt && rs != 0 && rt != 0
816
817 InsnType Rt = fieldFromInstruction(insn, 21, 5);
818 InsnType Rs = fieldFromInstruction(insn, 16, 5);
819 int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
820 bool HasRs = false;
821
822 if (Rt == 0)
823 return MCDisassembler::Fail;
824 else if (Rs == 0)
825 MI.setOpcode(Mips::BGTZC_MMR6);
826 else if (Rs == Rt)
827 MI.setOpcode(Mips::BLTZC_MMR6);
828 else {
829 MI.setOpcode(Mips::BLTC_MMR6);
830 HasRs = true;
831 }
832
833 if (HasRs)
834 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
835 Rs)));
836
837 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
838 Rt)));
839
840 MI.addOperand(MCOperand::createImm(Imm));
841
842 return MCDisassembler::Success;
843 }
844
845 template <typename InsnType>
846 static DecodeStatus DecodePOP75GroupBranchMMR6(MCInst &MI, InsnType insn,
847 uint64_t Address,
848 const void *Decoder) {
849 // We have:
850 // 0b111101 ttttt sssss iiiiiiiiiiiiiiii
851 // Invalid if rt == 0
852 // BLEZC_MMR6 if rs == 0 && rt != 0
853 // BGEZC_MMR6 if rs == rt && rt != 0
854 // BGEC_MMR6 if rs != rt && rs != 0 && rt != 0
855
856 InsnType Rt = fieldFromInstruction(insn, 21, 5);
857 InsnType Rs = fieldFromInstruction(insn, 16, 5);
858 int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
859 bool HasRs = false;
860
861 if (Rt == 0)
862 return MCDisassembler::Fail;
863 else if (Rs == 0)
864 MI.setOpcode(Mips::BLEZC_MMR6);
865 else if (Rs == Rt)
866 MI.setOpcode(Mips::BGEZC_MMR6);
867 else {
868 HasRs = true;
869 MI.setOpcode(Mips::BGEC_MMR6);
870 }
871
872 if (HasRs)
873 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
874 Rs)));
875
876 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
877 Rt)));
878
879 MI.addOperand(MCOperand::createImm(Imm));
880
881 return MCDisassembler::Success;
882 }
883
884 template <typename InsnType>
885 static DecodeStatus DecodeBlezlGroupBranch(MCInst &MI, InsnType insn,
886 uint64_t Address,
887 const void *Decoder) {
888 // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
889 // (otherwise we would have matched the BLEZL instruction from the earlier
890 // ISA's instead).
891 //
892 // We have:
893 // 0b010110 sssss ttttt iiiiiiiiiiiiiiii
894 // Invalid if rs == 0
895 // BLEZC if rs == 0 && rt != 0
896 // BGEZC if rs == rt && rt != 0
897 // BGEC if rs != rt && rs != 0 && rt != 0
898
899 InsnType Rs = fieldFromInstruction(insn, 21, 5);
900 InsnType Rt = fieldFromInstruction(insn, 16, 5);
901 int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
902 bool HasRs = false;
903
904 if (Rt == 0)
905 return MCDisassembler::Fail;
906 else if (Rs == 0)
907 MI.setOpcode(Mips::BLEZC);
908 else if (Rs == Rt)
909 MI.setOpcode(Mips::BGEZC);
910 else {
911 HasRs = true;
912 MI.setOpcode(Mips::BGEC);
913 }
914
915 if (HasRs)
916 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
917 Rs)));
918
919 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
920 Rt)));
921
922 MI.addOperand(MCOperand::createImm(Imm));
923
924 return MCDisassembler::Success;
925 }
926
927 template <typename InsnType>
928 static DecodeStatus DecodeBgtzlGroupBranch(MCInst &MI, InsnType insn,
929 uint64_t Address,
930 const void *Decoder) {
931 // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
932 // (otherwise we would have matched the BGTZL instruction from the earlier
933 // ISA's instead).
934 //
935 // We have:
936 // 0b010111 sssss ttttt iiiiiiiiiiiiiiii
937 // Invalid if rs == 0
938 // BGTZC if rs == 0 && rt != 0
939 // BLTZC if rs == rt && rt != 0
940 // BLTC if rs != rt && rs != 0 && rt != 0
941
942 bool HasRs = false;
943
944 InsnType Rs = fieldFromInstruction(insn, 21, 5);
945 InsnType Rt = fieldFromInstruction(insn, 16, 5);
946 int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
947
948 if (Rt == 0)
949 return MCDisassembler::Fail;
950 else if (Rs == 0)
951 MI.setOpcode(Mips::BGTZC);
952 else if (Rs == Rt)
953 MI.setOpcode(Mips::BLTZC);
954 else {
955 MI.setOpcode(Mips::BLTC);
956 HasRs = true;
957 }
958
959 if (HasRs)
960 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
961 Rs)));
962
963 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
964 Rt)));
965
966 MI.addOperand(MCOperand::createImm(Imm));
967
968 return MCDisassembler::Success;
969 }
970
971 template <typename InsnType>
972 static DecodeStatus DecodeBgtzGroupBranch(MCInst &MI, InsnType insn,
973 uint64_t Address,
974 const void *Decoder) {
975 // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
976 // (otherwise we would have matched the BGTZ instruction from the earlier
977 // ISA's instead).
978 //
979 // We have:
980 // 0b000111 sssss ttttt iiiiiiiiiiiiiiii
981 // BGTZ if rt == 0
982 // BGTZALC if rs == 0 && rt != 0
983 // BLTZALC if rs != 0 && rs == rt
984 // BLTUC if rs != 0 && rs != rt
985
986 InsnType Rs = fieldFromInstruction(insn, 21, 5);
987 InsnType Rt = fieldFromInstruction(insn, 16, 5);
988 int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
989 bool HasRs = false;
990 bool HasRt = false;
991
992 if (Rt == 0) {
993 MI.setOpcode(Mips::BGTZ);
994 HasRs = true;
995 } else if (Rs == 0) {
996 MI.setOpcode(Mips::BGTZALC);
997 HasRt = true;
998 } else if (Rs == Rt) {
999 MI.setOpcode(Mips::BLTZALC);
1000 HasRs = true;
1001 } else {
1002 MI.setOpcode(Mips::BLTUC);
1003 HasRs = true;
1004 HasRt = true;
1005 }
1006
1007 if (HasRs)
1008 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1009 Rs)));
1010
1011 if (HasRt)
1012 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1013 Rt)));
1014
1015 MI.addOperand(MCOperand::createImm(Imm));
1016
1017 return MCDisassembler::Success;
1018 }
1019
1020 template <typename InsnType>
1021 static DecodeStatus DecodeBlezGroupBranch(MCInst &MI, InsnType insn,
1022 uint64_t Address,
1023 const void *Decoder) {
1024 // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
1025 // (otherwise we would have matched the BLEZL instruction from the earlier
1026 // ISA's instead).
1027 //
1028 // We have:
1029 // 0b000110 sssss ttttt iiiiiiiiiiiiiiii
1030 // Invalid if rs == 0
1031 // BLEZALC if rs == 0 && rt != 0
1032 // BGEZALC if rs == rt && rt != 0
1033 // BGEUC if rs != rt && rs != 0 && rt != 0
1034
1035 InsnType Rs = fieldFromInstruction(insn, 21, 5);
1036 InsnType Rt = fieldFromInstruction(insn, 16, 5);
1037 int64_t Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
1038 bool HasRs = false;
1039
1040 if (Rt == 0)
1041 return MCDisassembler::Fail;
1042 else if (Rs == 0)
1043 MI.setOpcode(Mips::BLEZALC);
1044 else if (Rs == Rt)
1045 MI.setOpcode(Mips::BGEZALC);
1046 else {
1047 HasRs = true;
1048 MI.setOpcode(Mips::BGEUC);
1049 }
1050
1051 if (HasRs)
1052 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1053 Rs)));
1054 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1055 Rt)));
1056
1057 MI.addOperand(MCOperand::createImm(Imm));
1058
1059 return MCDisassembler::Success;
1060 }
1061
1062 // Override the generated disassembler to produce DEXT all the time. This is
1063 // for feature / behaviour parity with binutils.
1064 template <typename InsnType>
1065 static DecodeStatus DecodeDEXT(MCInst &MI, InsnType Insn, uint64_t Address,
1066 const void *Decoder) {
1067 unsigned Msbd = fieldFromInstruction(Insn, 11, 5);
1068 unsigned Lsb = fieldFromInstruction(Insn, 6, 5);
1069 unsigned Size = 0;
1070 unsigned Pos = 0;
1071
1072 switch (MI.getOpcode()) {
1073 case Mips::DEXT:
1074 Pos = Lsb;
1075 Size = Msbd + 1;
1076 break;
1077 case Mips::DEXTM:
1078 Pos = Lsb;
1079 Size = Msbd + 1 + 32;
1080 break;
1081 case Mips::DEXTU:
1082 Pos = Lsb + 32;
1083 Size = Msbd + 1;
1084 break;
1085 default:
1086 llvm_unreachable("Unknown DEXT instruction!");
1087 }
1088
1089 MI.setOpcode(Mips::DEXT);
1090
1091 InsnType Rs = fieldFromInstruction(Insn, 21, 5);
1092 InsnType Rt = fieldFromInstruction(Insn, 16, 5);
1093
1094 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID, Rt)));
1095 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID, Rs)));
1096 MI.addOperand(MCOperand::createImm(Pos));
1097 MI.addOperand(MCOperand::createImm(Size));
1098
1099 return MCDisassembler::Success;
1100 }
1101
1102 // Override the generated disassembler to produce DINS all the time. This is
1103 // for feature / behaviour parity with binutils.
1104 template <typename InsnType>
1105 static DecodeStatus DecodeDINS(MCInst &MI, InsnType Insn, uint64_t Address,
1106 const void *Decoder) {
1107 unsigned Msbd = fieldFromInstruction(Insn, 11, 5);
1108 unsigned Lsb = fieldFromInstruction(Insn, 6, 5);
1109 unsigned Size = 0;
1110 unsigned Pos = 0;
1111
1112 switch (MI.getOpcode()) {
1113 case Mips::DINS:
1114 Pos = Lsb;
1115 Size = Msbd + 1 - Pos;
1116 break;
1117 case Mips::DINSM:
1118 Pos = Lsb;
1119 Size = Msbd + 33 - Pos;
1120 break;
1121 case Mips::DINSU:
1122 Pos = Lsb + 32;
1123 // mbsd = pos + size - 33
1124 // mbsd - pos + 33 = size
1125 Size = Msbd + 33 - Pos;
1126 break;
1127 default:
1128 llvm_unreachable("Unknown DINS instruction!");
1129 }
1130
1131 InsnType Rs = fieldFromInstruction(Insn, 21, 5);
1132 InsnType Rt = fieldFromInstruction(Insn, 16, 5);
1133
1134 MI.setOpcode(Mips::DINS);
1135 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID, Rt)));
1136 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR64RegClassID, Rs)));
1137 MI.addOperand(MCOperand::createImm(Pos));
1138 MI.addOperand(MCOperand::createImm(Size));
1139
1140 return MCDisassembler::Success;
1141 }
1142
1143 // Auto-generated decoder wouldn't add the third operand for CRC32*.
1144 template <typename InsnType>
1145 static DecodeStatus DecodeCRC(MCInst &MI, InsnType Insn, uint64_t Address,
1146 const void *Decoder) {
1147 InsnType Rs = fieldFromInstruction(Insn, 21, 5);
1148 InsnType Rt = fieldFromInstruction(Insn, 16, 5);
1149 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1150 Rt)));
1151 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1152 Rs)));
1153 MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
1154 Rt)));
1155 return MCDisassembler::Success;
1156 }
1157
1158 /// Read two bytes from the ArrayRef and return 16 bit halfword sorted
1159 /// according to the given endianness.
1160 static DecodeStatus readInstruction16(ArrayRef<uint8_t> Bytes, uint64_t Address,
1161 uint64_t &Size, uint32_t &Insn,
1162 bool IsBigEndian) {
1163 // We want to read exactly 2 Bytes of data.
1164 if (Bytes.size() < 2) {
1165 Size = 0;
1166 return MCDisassembler::Fail;
1167 }
1168
1169 if (IsBigEndian) {
1170 Insn = (Bytes[0] << 8) | Bytes[1];
1171 } else {
1172 Insn = (Bytes[1] << 8) | Bytes[0];
1173 }
1174
1175 return MCDisassembler::Success;
1176 }
1177
1178 /// Read four bytes from the ArrayRef and return 32 bit word sorted
1179 /// according to the given endianness.
1180 static DecodeStatus readInstruction32(ArrayRef<uint8_t> Bytes, uint64_t Address,
1181 uint64_t &Size, uint32_t &Insn,
1182 bool IsBigEndian, bool IsMicroMips) {
1183 // We want to read exactly 4 Bytes of data.
1184 if (Bytes.size() < 4) {
1185 Size = 0;
1186 return MCDisassembler::Fail;
1187 }
1188
1189 // High 16 bits of a 32-bit microMIPS instruction (where the opcode is)
1190 // always precede the low 16 bits in the instruction stream (that is, they
1191 // are placed at lower addresses in the instruction stream).
1192 //
1193 // microMIPS byte ordering:
1194 // Big-endian: 0 | 1 | 2 | 3
1195 // Little-endian: 1 | 0 | 3 | 2
1196
1197 if (IsBigEndian) {
1198 // Encoded as a big-endian 32-bit word in the stream.
1199 Insn =
1200 (Bytes[3] << 0) | (Bytes[2] << 8) | (Bytes[1] << 16) | (Bytes[0] << 24);
1201 } else {
1202 if (IsMicroMips) {
1203 Insn = (Bytes[2] << 0) | (Bytes[3] << 8) | (Bytes[0] << 16) |
1204 (Bytes[1] << 24);
1205 } else {
1206 Insn = (Bytes[0] << 0) | (Bytes[1] << 8) | (Bytes[2] << 16) |
1207 (Bytes[3] << 24);
1208 }
1209 }
1210
1211 return MCDisassembler::Success;
1212 }
1213
1214 DecodeStatus MipsDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
1215 ArrayRef<uint8_t> Bytes,
1216 uint64_t Address,
1217 raw_ostream &VStream,
1218 raw_ostream &CStream) const {
1219 uint32_t Insn;
1220 DecodeStatus Result;
1221 Size = 0;
1222
1223 if (IsMicroMips) {
1224 Result = readInstruction16(Bytes, Address, Size, Insn, IsBigEndian);
1225 if (Result == MCDisassembler::Fail)
1226 return MCDisassembler::Fail;
1227
1228 if (hasMips32r6()) {
1229 LLVM_DEBUG(
1230 dbgs() << "Trying MicroMipsR616 table (16-bit instructions):\n");
1231 // Calling the auto-generated decoder function for microMIPS32R6
1232 // 16-bit instructions.
1233 Result = decodeInstruction(DecoderTableMicroMipsR616, Instr, Insn,
1234 Address, this, STI);
1235 if (Result != MCDisassembler::Fail) {
1236 Size = 2;
1237 return Result;
1238 }
1239 }
1240
1241 LLVM_DEBUG(dbgs() << "Trying MicroMips16 table (16-bit instructions):\n");
1242 // Calling the auto-generated decoder function for microMIPS 16-bit
1243 // instructions.
1244 Result = decodeInstruction(DecoderTableMicroMips16, Instr, Insn, Address,
1245 this, STI);
1246 if (Result != MCDisassembler::Fail) {
1247 Size = 2;
1248 return Result;
1249 }
1250
1251 Result = readInstruction32(Bytes, Address, Size, Insn, IsBigEndian, true);
1252 if (Result == MCDisassembler::Fail)
1253 return MCDisassembler::Fail;
1254
1255 if (hasMips32r6()) {
1256 LLVM_DEBUG(
1257 dbgs() << "Trying MicroMips32r632 table (32-bit instructions):\n");
1258 // Calling the auto-generated decoder function.
1259 Result = decodeInstruction(DecoderTableMicroMipsR632, Instr, Insn, Address,
1260 this, STI);
1261 if (Result != MCDisassembler::Fail) {
1262 Size = 4;
1263 return Result;
1264 }
1265 }
1266
1267 LLVM_DEBUG(dbgs() << "Trying MicroMips32 table (32-bit instructions):\n");
1268 // Calling the auto-generated decoder function.
1269 Result = decodeInstruction(DecoderTableMicroMips32, Instr, Insn, Address,
1270 this, STI);
1271 if (Result != MCDisassembler::Fail) {
1272 Size = 4;
1273 return Result;
1274 }
1275
1276 if (isFP64()) {
1277 LLVM_DEBUG(dbgs() << "Trying MicroMipsFP64 table (32-bit opcodes):\n");
1278 Result = decodeInstruction(DecoderTableMicroMipsFP6432, Instr, Insn,
1279 Address, this, STI);
1280 if (Result != MCDisassembler::Fail) {
1281 Size = 4;
1282 return Result;
1283 }
1284 }
1285
1286 // This is an invalid instruction. Claim that the Size is 2 bytes. Since
1287 // microMIPS instructions have a minimum alignment of 2, the next 2 bytes
1288 // could form a valid instruction. The two bytes we rejected as an
1289 // instruction could have actually beeen an inline constant pool that is
1290 // unconditionally branched over.
1291 Size = 2;
1292 return MCDisassembler::Fail;
1293 }
1294
1295 // Attempt to read the instruction so that we can attempt to decode it. If
1296 // the buffer is not 4 bytes long, let the higher level logic figure out
1297 // what to do with a size of zero and MCDisassembler::Fail.
1298 Result = readInstruction32(Bytes, Address, Size, Insn, IsBigEndian, false);
1299 if (Result == MCDisassembler::Fail)
1300 return MCDisassembler::Fail;
1301
1302 // The only instruction size for standard encoded MIPS.
1303 Size = 4;
1304
1305 if (hasCOP3()) {
1306 LLVM_DEBUG(dbgs() << "Trying COP3_ table (32-bit opcodes):\n");
1307 Result =
1308 decodeInstruction(DecoderTableCOP3_32, Instr, Insn, Address, this, STI);
1309 if (Result != MCDisassembler::Fail)
1310 return Result;
1311 }
1312
1313 if (hasMips32r6() && isGP64()) {
1314 LLVM_DEBUG(
1315 dbgs() << "Trying Mips32r6_64r6 (GPR64) table (32-bit opcodes):\n");
1316 Result = decodeInstruction(DecoderTableMips32r6_64r6_GP6432, Instr, Insn,
1317 Address, this, STI);
1318 if (Result != MCDisassembler::Fail)
1319 return Result;
1320 }
1321
1322 if (hasMips32r6() && isPTR64()) {
1323 LLVM_DEBUG(
1324 dbgs() << "Trying Mips32r6_64r6 (PTR64) table (32-bit opcodes):\n");
1325 Result = decodeInstruction(DecoderTableMips32r6_64r6_PTR6432, Instr, Insn,
1326 Address, this, STI);
1327 if (Result != MCDisassembler::Fail)
1328 return Result;
1329 }
1330
1331 if (hasMips32r6()) {
1332 LLVM_DEBUG(dbgs() << "Trying Mips32r6_64r6 table (32-bit opcodes):\n");
1333 Result = decodeInstruction(DecoderTableMips32r6_64r632, Instr, Insn,
1334 Address, this, STI);
1335 if (Result != MCDisassembler::Fail)
1336 return Result;
1337 }
1338
1339 if (hasMips2() && isPTR64()) {
1340 LLVM_DEBUG(
1341 dbgs() << "Trying Mips32r6_64r6 (PTR64) table (32-bit opcodes):\n");
1342 Result = decodeInstruction(DecoderTableMips32_64_PTR6432, Instr, Insn,
1343 Address, this, STI);
1344 if (Result != MCDisassembler::Fail)
1345 return Result;
1346 }
1347
1348 if (hasCnMips()) {
1349 LLVM_DEBUG(dbgs() << "Trying CnMips table (32-bit opcodes):\n");
1350 Result = decodeInstruction(DecoderTableCnMips32, Instr, Insn,
1351 Address, this, STI);
1352 if (Result != MCDisassembler::Fail)
1353 return Result;
1354 }
1355
1356 if (isGP64()) {
1357 LLVM_DEBUG(dbgs() << "Trying Mips64 (GPR64) table (32-bit opcodes):\n");
1358 Result = decodeInstruction(DecoderTableMips6432, Instr, Insn,
1359 Address, this, STI);
1360 if (Result != MCDisassembler::Fail)
1361 return Result;
1362 }
1363
1364 if (isFP64()) {
1365 LLVM_DEBUG(
1366 dbgs() << "Trying MipsFP64 (64 bit FPU) table (32-bit opcodes):\n");
1367 Result = decodeInstruction(DecoderTableMipsFP6432, Instr, Insn,
1368 Address, this, STI);
1369 if (Result != MCDisassembler::Fail)
1370 return Result;
1371 }
1372
1373 LLVM_DEBUG(dbgs() << "Trying Mips table (32-bit opcodes):\n");
1374 // Calling the auto-generated decoder function.
1375 Result =
1376 decodeInstruction(DecoderTableMips32, Instr, Insn, Address, this, STI);
1377 if (Result != MCDisassembler::Fail)
1378 return Result;
1379
1380 return MCDisassembler::Fail;
1381 }
1382
1383 static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst &Inst,
1384 unsigned RegNo,
1385 uint64_t Address,
1386 const void *Decoder) {
1387 return MCDisassembler::Fail;
1388 }
1389
1390 static DecodeStatus DecodeGPR64RegisterClass(MCInst &Inst,
1391 unsigned RegNo,
1392 uint64_t Address,
1393 const void *Decoder) {
1394 if (RegNo > 31)
1395 return MCDisassembler::Fail;
1396
1397 unsigned Reg = getReg(Decoder, Mips::GPR64RegClassID, RegNo);
1398 Inst.addOperand(MCOperand::createReg(Reg));
1399 return MCDisassembler::Success;
1400 }
1401
1402 static DecodeStatus DecodeGPRMM16RegisterClass(MCInst &Inst,
1403 unsigned RegNo,
1404 uint64_t Address,
1405 const void *Decoder) {
1406 if (RegNo > 7)
1407 return MCDisassembler::Fail;
1408 unsigned Reg = getReg(Decoder, Mips::GPRMM16RegClassID, RegNo);
1409 Inst.addOperand(MCOperand::createReg(Reg));
1410 return MCDisassembler::Success;
1411 }
1412
1413 static DecodeStatus DecodeGPRMM16ZeroRegisterClass(MCInst &Inst,
1414 unsigned RegNo,
1415 uint64_t Address,
1416 const void *Decoder) {
1417 if (RegNo > 7)
1418 return MCDisassembler::Fail;
1419 unsigned Reg = getReg(Decoder, Mips::GPRMM16ZeroRegClassID, RegNo);
1420 Inst.addOperand(MCOperand::createReg(Reg));
1421 return MCDisassembler::Success;
1422 }
1423
1424 static DecodeStatus DecodeGPRMM16MovePRegisterClass(MCInst &Inst,
1425 unsigned RegNo,
1426 uint64_t Address,
1427 const void *Decoder) {
1428 if (RegNo > 7)
1429 return MCDisassembler::Fail;
1430 unsigned Reg = getReg(Decoder, Mips::GPRMM16MovePRegClassID, RegNo);
1431 Inst.addOperand(MCOperand::createReg(Reg));
1432 return MCDisassembler::Success;
1433 }
1434
1435 static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst,
1436 unsigned RegNo,
1437 uint64_t Address,
1438 const void *Decoder) {
1439 if (RegNo > 31)
1440 return MCDisassembler::Fail;
1441 unsigned Reg = getReg(Decoder, Mips::GPR32RegClassID, RegNo);
1442 Inst.addOperand(MCOperand::createReg(Reg));
1443 return MCDisassembler::Success;
1444 }
1445
1446 static DecodeStatus DecodePtrRegisterClass(MCInst &Inst,
1447 unsigned RegNo,
1448 uint64_t Address,
1449 const void *Decoder) {
1450 if (static_cast<const MipsDisassembler *>(Decoder)->isGP64())
1451 return DecodeGPR64RegisterClass(Inst, RegNo, Address, Decoder);
1452
1453 return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
1454 }
1455
1456 static DecodeStatus DecodeDSPRRegisterClass(MCInst &Inst,
1457 unsigned RegNo,
1458 uint64_t Address,
1459 const void *Decoder) {
1460 return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
1461 }
1462
1463 static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst,
1464 unsigned RegNo,
1465 uint64_t Address,
1466 const void *Decoder) {
1467 if (RegNo > 31)
1468 return MCDisassembler::Fail;
1469
1470 unsigned Reg = getReg(Decoder, Mips::FGR64RegClassID, RegNo);
1471 Inst.addOperand(MCOperand::createReg(Reg));
1472 return MCDisassembler::Success;
1473 }
1474
1475 static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst,
1476 unsigned RegNo,
1477 uint64_t Address,
1478 const void *Decoder) {
1479 if (RegNo > 31)
1480 return MCDisassembler::Fail;
1481
1482 unsigned Reg = getReg(Decoder, Mips::FGR32RegClassID, RegNo);
1483 Inst.addOperand(MCOperand::createReg(Reg));
1484 return MCDisassembler::Success;
1485 }
1486
1487 static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst,
1488 unsigned RegNo,
1489 uint64_t Address,
1490 const void *Decoder) {
1491 if (RegNo > 31)
1492 return MCDisassembler::Fail;
1493 unsigned Reg = getReg(Decoder, Mips::CCRRegClassID, RegNo);
1494 Inst.addOperand(MCOperand::createReg(Reg));
1495 return MCDisassembler::Success;
1496 }
1497
1498 static DecodeStatus DecodeFCCRegisterClass(MCInst &Inst,
1499 unsigned RegNo,
1500 uint64_t Address,
1501 const void *Decoder) {
1502 if (RegNo > 7)
1503 return MCDisassembler::Fail;
1504 unsigned Reg = getReg(Decoder, Mips::FCCRegClassID, RegNo);
1505 Inst.addOperand(MCOperand::createReg(Reg));
1506 return MCDisassembler::Success;
1507 }
1508
1509 static DecodeStatus DecodeFGRCCRegisterClass(MCInst &Inst, unsigned RegNo,
1510 uint64_t Address,
1511 const void *Decoder) {
1512 if (RegNo > 31)
1513 return MCDisassembler::Fail;
1514
1515 unsigned Reg = getReg(Decoder, Mips::FGRCCRegClassID, RegNo);
1516 Inst.addOperand(MCOperand::createReg(Reg));
1517 return MCDisassembler::Success;
1518 }
1519
1520 static DecodeStatus DecodeMem(MCInst &Inst,
1521 unsigned Insn,
1522 uint64_t Address,
1523 const void *Decoder) {
1524 int Offset = SignExtend32<16>(Insn & 0xffff);
1525 unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1526 unsigned Base = fieldFromInstruction(Insn, 21, 5);
1527
1528 Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1529 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1530
1531 if (Inst.getOpcode() == Mips::SC ||
1532 Inst.getOpcode() == Mips::SCD)
1533 Inst.addOperand(MCOperand::createReg(Reg));
1534
1535 Inst.addOperand(MCOperand::createReg(Reg));
1536 Inst.addOperand(MCOperand::createReg(Base));
1537 Inst.addOperand(MCOperand::createImm(Offset));
1538
1539 return MCDisassembler::Success;
1540 }
1541
1542 static DecodeStatus DecodeMemEVA(MCInst &Inst,
1543 unsigned Insn,
1544 uint64_t Address,
1545 const void *Decoder) {
1546 int Offset = SignExtend32<9>(Insn >> 7);
1547 unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1548 unsigned Base = fieldFromInstruction(Insn, 21, 5);
1549
1550 Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1551 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1552
1553 if (Inst.getOpcode() == Mips::SCE)
1554 Inst.addOperand(MCOperand::createReg(Reg));
1555
1556 Inst.addOperand(MCOperand::createReg(Reg));
1557 Inst.addOperand(MCOperand::createReg(Base));
1558 Inst.addOperand(MCOperand::createImm(Offset));
1559
1560 return MCDisassembler::Success;
1561 }
1562
1563 static DecodeStatus DecodeLoadByte15(MCInst &Inst,
1564 unsigned Insn,
1565 uint64_t Address,
1566 const void *Decoder) {
1567 int Offset = SignExtend32<16>(Insn & 0xffff);
1568 unsigned Base = fieldFromInstruction(Insn, 16, 5);
1569 unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1570
1571 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1572 Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1573
1574 Inst.addOperand(MCOperand::createReg(Reg));
1575 Inst.addOperand(MCOperand::createReg(Base));
1576 Inst.addOperand(MCOperand::createImm(Offset));
1577
1578 return MCDisassembler::Success;
1579 }
1580
1581 static DecodeStatus DecodeCacheOp(MCInst &Inst,
1582 unsigned Insn,
1583 uint64_t Address,
1584 const void *Decoder) {
1585 int Offset = SignExtend32<16>(Insn & 0xffff);
1586 unsigned Hint = fieldFromInstruction(Insn, 16, 5);
1587 unsigned Base = fieldFromInstruction(Insn, 21, 5);
1588
1589 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1590
1591 Inst.addOperand(MCOperand::createReg(Base));
1592 Inst.addOperand(MCOperand::createImm(Offset));
1593 Inst.addOperand(MCOperand::createImm(Hint));
1594
1595 return MCDisassembler::Success;
1596 }
1597
1598 static DecodeStatus DecodeCacheOpMM(MCInst &Inst,
1599 unsigned Insn,
1600 uint64_t Address,
1601 const void *Decoder) {
1602 int Offset = SignExtend32<12>(Insn & 0xfff);
1603 unsigned Base = fieldFromInstruction(Insn, 16, 5);
1604 unsigned Hint = fieldFromInstruction(Insn, 21, 5);
1605
1606 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1607
1608 Inst.addOperand(MCOperand::createReg(Base));
1609 Inst.addOperand(MCOperand::createImm(Offset));
1610 Inst.addOperand(MCOperand::createImm(Hint));
1611
1612 return MCDisassembler::Success;
1613 }
1614
1615 static DecodeStatus DecodePrefeOpMM(MCInst &Inst,
1616 unsigned Insn,
1617 uint64_t Address,
1618 const void *Decoder) {
1619 int Offset = SignExtend32<9>(Insn & 0x1ff);
1620 unsigned Base = fieldFromInstruction(Insn, 16, 5);
1621 unsigned Hint = fieldFromInstruction(Insn, 21, 5);
1622
1623 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1624
1625 Inst.addOperand(MCOperand::createReg(Base));
1626 Inst.addOperand(MCOperand::createImm(Offset));
1627 Inst.addOperand(MCOperand::createImm(Hint));
1628
1629 return MCDisassembler::Success;
1630 }
1631
1632 static DecodeStatus DecodeCacheeOp_CacheOpR6(MCInst &Inst,
1633 unsigned Insn,
1634 uint64_t Address,
1635 const void *Decoder) {
1636 int Offset = SignExtend32<9>(Insn >> 7);
1637 unsigned Hint = fieldFromInstruction(Insn, 16, 5);
1638 unsigned Base = fieldFromInstruction(Insn, 21, 5);
1639
1640 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1641
1642 Inst.addOperand(MCOperand::createReg(Base));
1643 Inst.addOperand(MCOperand::createImm(Offset));
1644 Inst.addOperand(MCOperand::createImm(Hint));
1645
1646 return MCDisassembler::Success;
1647 }
1648
1649 static DecodeStatus DecodeSyncI(MCInst &Inst,
1650 unsigned Insn,
1651 uint64_t Address,
1652 const void *Decoder) {
1653 int Offset = SignExtend32<16>(Insn & 0xffff);
1654 unsigned Base = fieldFromInstruction(Insn, 21, 5);
1655
1656 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1657
1658 Inst.addOperand(MCOperand::createReg(Base));
1659 Inst.addOperand(MCOperand::createImm(Offset));
1660
1661 return MCDisassembler::Success;
1662 }
1663
1664 static DecodeStatus DecodeSyncI_MM(MCInst &Inst, unsigned Insn,
1665 uint64_t Address, const void *Decoder) {
1666 int Offset = SignExtend32<16>(Insn & 0xffff);
1667 unsigned Base = fieldFromInstruction(Insn, 16, 5);
1668
1669 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1670
1671 Inst.addOperand(MCOperand::createReg(Base));
1672 Inst.addOperand(MCOperand::createImm(Offset));
1673
1674 return MCDisassembler::Success;
1675 }
1676
1677 static DecodeStatus DecodeSynciR6(MCInst &Inst,
1678 unsigned Insn,
1679 uint64_t Address,
1680 const void *Decoder) {
1681 int Immediate = SignExtend32<16>(Insn & 0xffff);
1682 unsigned Base = fieldFromInstruction(Insn, 16, 5);
1683
1684 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1685
1686 Inst.addOperand(MCOperand::createReg(Base));
1687 Inst.addOperand(MCOperand::createImm(Immediate));
1688
1689 return MCDisassembler::Success;
1690 }
1691
1692 static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn,
1693 uint64_t Address, const void *Decoder) {
1694 int Offset = SignExtend32<10>(fieldFromInstruction(Insn, 16, 10));
1695 unsigned Reg = fieldFromInstruction(Insn, 6, 5);
1696 unsigned Base = fieldFromInstruction(Insn, 11, 5);
1697
1698 Reg = getReg(Decoder, Mips::MSA128BRegClassID, Reg);
1699 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1700
1701 Inst.addOperand(MCOperand::createReg(Reg));
1702 Inst.addOperand(MCOperand::createReg(Base));
1703
1704 // The immediate field of an LD/ST instruction is scaled which means it must
1705 // be multiplied (when decoding) by the size (in bytes) of the instructions'
1706 // data format.
1707 // .b - 1 byte
1708 // .h - 2 bytes
1709 // .w - 4 bytes
1710 // .d - 8 bytes
1711 switch(Inst.getOpcode())
1712 {
1713 default:
1714 assert(false && "Unexpected instruction");
1715 return MCDisassembler::Fail;
1716 break;
1717 case Mips::LD_B:
1718 case Mips::ST_B:
1719 Inst.addOperand(MCOperand::createImm(Offset));
1720 break;
1721 case Mips::LD_H:
1722 case Mips::ST_H:
1723 Inst.addOperand(MCOperand::createImm(Offset * 2));
1724 break;
1725 case Mips::LD_W:
1726 case Mips::ST_W:
1727 Inst.addOperand(MCOperand::createImm(Offset * 4));
1728 break;
1729 case Mips::LD_D:
1730 case Mips::ST_D:
1731 Inst.addOperand(MCOperand::createImm(Offset * 8));
1732 break;
1733 }
1734
1735 return MCDisassembler::Success;
1736 }
1737
1738 static DecodeStatus DecodeMemMMImm4(MCInst &Inst,
1739 unsigned Insn,
1740 uint64_t Address,
1741 const void *Decoder) {
1742 unsigned Offset = Insn & 0xf;
1743 unsigned Reg = fieldFromInstruction(Insn, 7, 3);
1744 unsigned Base = fieldFromInstruction(Insn, 4, 3);
1745
1746 switch (Inst.getOpcode()) {
1747 case Mips::LBU16_MM:
1748 case Mips::LHU16_MM:
1749 case Mips::LW16_MM:
1750 if (DecodeGPRMM16RegisterClass(Inst, Reg, Address, Decoder)
1751 == MCDisassembler::Fail)
1752 return MCDisassembler::Fail;
1753 break;
1754 case Mips::SB16_MM:
1755 case Mips::SB16_MMR6:
1756 case Mips::SH16_MM:
1757 case Mips::SH16_MMR6:
1758 case Mips::SW16_MM:
1759 case Mips::SW16_MMR6:
1760 if (DecodeGPRMM16ZeroRegisterClass(Inst, Reg, Address, Decoder)
1761 == MCDisassembler::Fail)
1762 return MCDisassembler::Fail;
1763 break;
1764 }
1765
1766 if (DecodeGPRMM16RegisterClass(Inst, Base, Address, Decoder)
1767 == MCDisassembler::Fail)
1768 return MCDisassembler::Fail;
1769
1770 switch (Inst.getOpcode()) {
1771 case Mips::LBU16_MM:
1772 if (Offset == 0xf)
1773 Inst.addOperand(MCOperand::createImm(-1));
1774 else
1775 Inst.addOperand(MCOperand::createImm(Offset));
1776 break;
1777 case Mips::SB16_MM:
1778 case Mips::SB16_MMR6:
1779 Inst.addOperand(MCOperand::createImm(Offset));
1780 break;
1781 case Mips::LHU16_MM:
1782 case Mips::SH16_MM:
1783 case Mips::SH16_MMR6:
1784 Inst.addOperand(MCOperand::createImm(Offset << 1));
1785 break;
1786 case Mips::LW16_MM:
1787 case Mips::SW16_MM:
1788 case Mips::SW16_MMR6:
1789 Inst.addOperand(MCOperand::createImm(Offset << 2));
1790 break;
1791 }
1792
1793 return MCDisassembler::Success;
1794 }
1795
1796 static DecodeStatus DecodeMemMMSPImm5Lsl2(MCInst &Inst,
1797 unsigned Insn,
1798 uint64_t Address,
1799 const void *Decoder) {
1800 unsigned Offset = Insn & 0x1F;
1801 unsigned Reg = fieldFromInstruction(Insn, 5, 5);
1802
1803 Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1804
1805 Inst.addOperand(MCOperand::createReg(Reg));
1806 Inst.addOperand(MCOperand::createReg(Mips::SP));
1807 Inst.addOperand(MCOperand::createImm(Offset << 2));
1808
1809 return MCDisassembler::Success;
1810 }
1811
1812 static DecodeStatus DecodeMemMMGPImm7Lsl2(MCInst &Inst,
1813 unsigned Insn,
1814 uint64_t Address,
1815 const void *Decoder) {
1816 unsigned Offset = Insn & 0x7F;
1817 unsigned Reg = fieldFromInstruction(Insn, 7, 3);
1818
1819 Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1820
1821 Inst.addOperand(MCOperand::createReg(Reg));
1822 Inst.addOperand(MCOperand::createReg(Mips::GP));
1823 Inst.addOperand(MCOperand::createImm(Offset << 2));
1824
1825 return MCDisassembler::Success;
1826 }
1827
1828 static DecodeStatus DecodeMemMMReglistImm4Lsl2(MCInst &Inst,
1829 unsigned Insn,
1830 uint64_t Address,
1831 const void *Decoder) {
1832 int Offset;
1833 switch (Inst.getOpcode()) {
1834 case Mips::LWM16_MMR6:
1835 case Mips::SWM16_MMR6:
1836 Offset = fieldFromInstruction(Insn, 4, 4);
1837 break;
1838 default:
1839 Offset = SignExtend32<4>(Insn & 0xf);
1840 break;
1841 }
1842
1843 if (DecodeRegListOperand16(Inst, Insn, Address, Decoder)
1844 == MCDisassembler::Fail)
1845 return MCDisassembler::Fail;
1846
1847 Inst.addOperand(MCOperand::createReg(Mips::SP));
1848 Inst.addOperand(MCOperand::createImm(Offset << 2));
1849
1850 return MCDisassembler::Success;
1851 }
1852
1853 static DecodeStatus DecodeMemMMImm9(MCInst &Inst,
1854 unsigned Insn,
1855 uint64_t Address,
1856 const void *Decoder) {
1857 int Offset = SignExtend32<9>(Insn & 0x1ff);
1858 unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1859 unsigned Base = fieldFromInstruction(Insn, 16, 5);
1860
1861 Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1862 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1863
1864 if (Inst.getOpcode() == Mips::SCE_MM || Inst.getOpcode() == Mips::SC_MMR6)
1865 Inst.addOperand(MCOperand::createReg(Reg));
1866
1867 Inst.addOperand(MCOperand::createReg(Reg));
1868 Inst.addOperand(MCOperand::createReg(Base));
1869 Inst.addOperand(MCOperand::createImm(Offset));
1870
1871 return MCDisassembler::Success;
1872 }
1873
1874 static DecodeStatus DecodeMemMMImm12(MCInst &Inst,
1875 unsigned Insn,
1876 uint64_t Address,
1877 const void *Decoder) {
1878 int Offset = SignExtend32<12>(Insn & 0x0fff);
1879 unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1880 unsigned Base = fieldFromInstruction(Insn, 16, 5);
1881
1882 Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1883 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1884
1885 switch (Inst.getOpcode()) {
1886 case Mips::SWM32_MM:
1887 case Mips::LWM32_MM:
1888 if (DecodeRegListOperand(Inst, Insn, Address, Decoder)
1889 == MCDisassembler::Fail)
1890 return MCDisassembler::Fail;
1891 Inst.addOperand(MCOperand::createReg(Base));
1892 Inst.addOperand(MCOperand::createImm(Offset));
1893 break;
1894 case Mips::SC_MM:
1895 Inst.addOperand(MCOperand::createReg(Reg));
1896 LLVM_FALLTHROUGH;
1897 default:
1898 Inst.addOperand(MCOperand::createReg(Reg));
1899 if (Inst.getOpcode() == Mips::LWP_MM || Inst.getOpcode() == Mips::SWP_MM)
1900 Inst.addOperand(MCOperand::createReg(Reg+1));
1901
1902 Inst.addOperand(MCOperand::createReg(Base));
1903 Inst.addOperand(MCOperand::createImm(Offset));
1904 }
1905
1906 return MCDisassembler::Success;
1907 }
1908
1909 static DecodeStatus DecodeMemMMImm16(MCInst &Inst,
1910 unsigned Insn,
1911 uint64_t Address,
1912 const void *Decoder) {
1913 int Offset = SignExtend32<16>(Insn & 0xffff);
1914 unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1915 unsigned Base = fieldFromInstruction(Insn, 16, 5);
1916
1917 Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
1918 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1919
1920 Inst.addOperand(MCOperand::createReg(Reg));
1921 Inst.addOperand(MCOperand::createReg(Base));
1922 Inst.addOperand(MCOperand::createImm(Offset));
1923
1924 return MCDisassembler::Success;
1925 }
1926
1927 static DecodeStatus DecodeFMem(MCInst &Inst,
1928 unsigned Insn,
1929 uint64_t Address,
1930 const void *Decoder) {
1931 int Offset = SignExtend32<16>(Insn & 0xffff);
1932 unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1933 unsigned Base = fieldFromInstruction(Insn, 21, 5);
1934
1935 Reg = getReg(Decoder, Mips::FGR64RegClassID, Reg);
1936 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1937
1938 Inst.addOperand(MCOperand::createReg(Reg));
1939 Inst.addOperand(MCOperand::createReg(Base));
1940 Inst.addOperand(MCOperand::createImm(Offset));
1941
1942 return MCDisassembler::Success;
1943 }
1944
1945 static DecodeStatus DecodeFMemMMR2(MCInst &Inst, unsigned Insn,
1946 uint64_t Address, const void *Decoder) {
1947 // This function is the same as DecodeFMem but with the Reg and Base fields
1948 // swapped according to microMIPS spec.
1949 int Offset = SignExtend32<16>(Insn & 0xffff);
1950 unsigned Base = fieldFromInstruction(Insn, 16, 5);
1951 unsigned Reg = fieldFromInstruction(Insn, 21, 5);
1952
1953 Reg = getReg(Decoder, Mips::FGR64RegClassID, Reg);
1954 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1955
1956 Inst.addOperand(MCOperand::createReg(Reg));
1957 Inst.addOperand(MCOperand::createReg(Base));
1958 Inst.addOperand(MCOperand::createImm(Offset));
1959
1960 return MCDisassembler::Success;
1961 }
1962
1963 static DecodeStatus DecodeFMem2(MCInst &Inst,
1964 unsigned Insn,
1965 uint64_t Address,
1966 const void *Decoder) {
1967 int Offset = SignExtend32<16>(Insn & 0xffff);
1968 unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1969 unsigned Base = fieldFromInstruction(Insn, 21, 5);
1970
1971 Reg = getReg(Decoder, Mips::COP2RegClassID, Reg);
1972 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1973
1974 Inst.addOperand(MCOperand::createReg(Reg));
1975 Inst.addOperand(MCOperand::createReg(Base));
1976 Inst.addOperand(MCOperand::createImm(Offset));
1977
1978 return MCDisassembler::Success;
1979 }
1980
1981 static DecodeStatus DecodeFMem3(MCInst &Inst,
1982 unsigned Insn,
1983 uint64_t Address,
1984 const void *Decoder) {
1985 int Offset = SignExtend32<16>(Insn & 0xffff);
1986 unsigned Reg = fieldFromInstruction(Insn, 16, 5);
1987 unsigned Base = fieldFromInstruction(Insn, 21, 5);
1988
1989 Reg = getReg(Decoder, Mips::COP3RegClassID, Reg);
1990 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
1991
1992 Inst.addOperand(MCOperand::createReg(Reg));
1993 Inst.addOperand(MCOperand::createReg(Base));
1994 Inst.addOperand(MCOperand::createImm(Offset));
1995
1996 return MCDisassembler::Success;
1997 }
1998
1999 static DecodeStatus DecodeFMemCop2R6(MCInst &Inst,
2000 unsigned Insn,
2001 uint64_t Address,
2002 const void *Decoder) {
2003 int Offset = SignExtend32<11>(Insn & 0x07ff);
2004 unsigned Reg = fieldFromInstruction(Insn, 16, 5);
2005 unsigned Base = fieldFromInstruction(Insn, 11, 5);
2006
2007 Reg = getReg(Decoder, Mips::COP2RegClassID, Reg);
2008 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
2009
2010 Inst.addOperand(MCOperand::createReg(Reg));
2011 Inst.addOperand(MCOperand::createReg(Base));
2012 Inst.addOperand(MCOperand::createImm(Offset));
2013
2014 return MCDisassembler::Success;
2015 }
2016
2017 static DecodeStatus DecodeFMemCop2MMR6(MCInst &Inst, unsigned Insn,
2018 uint64_t Address, const void *Decoder) {
2019 int Offset = SignExtend32<11>(Insn & 0x07ff);
2020 unsigned Reg = fieldFromInstruction(Insn, 21, 5);
2021 unsigned Base = fieldFromInstruction(Insn, 16, 5);
2022
2023 Reg = getReg(Decoder, Mips::COP2RegClassID, Reg);
2024 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
2025
2026 Inst.addOperand(MCOperand::createReg(Reg));
2027 Inst.addOperand(MCOperand::createReg(Base));
2028 Inst.addOperand(MCOperand::createImm(Offset));
2029
2030 return MCDisassembler::Success;
2031 }
2032
2033 static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst,
2034 unsigned Insn,
2035 uint64_t Address,
2036 const void *Decoder) {
2037 int64_t Offset = SignExtend64<9>((Insn >> 7) & 0x1ff);
2038 unsigned Rt = fieldFromInstruction(Insn, 16, 5);
2039 unsigned Base = fieldFromInstruction(Insn, 21, 5);
2040
2041 Rt = getReg(Decoder, Mips::GPR32RegClassID, Rt);
2042 Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
2043
2044 if(Inst.getOpcode() == Mips::SC_R6 || Inst.getOpcode() == Mips::SCD_R6){
2045 Inst.addOperand(MCOperand::createReg(Rt));
2046 }
2047
2048 Inst.addOperand(MCOperand::createReg(Rt));
2049 Inst.addOperand(MCOperand::createReg(Base));
2050 Inst.addOperand(MCOperand::createImm(Offset));
2051
2052 return MCDisassembler::Success;
2053 }
2054
2055 static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst,
2056 unsigned RegNo,
2057 uint64_t Address,
2058 const void *Decoder) {
2059 // Currently only hardware register 29 is supported.
2060 if (RegNo != 29)
2061 return MCDisassembler::Fail;
2062 Inst.addOperand(MCOperand::createReg(Mips::HWR29));
2063 return MCDisassembler::Success;
2064 }
2065
2066 static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst,
2067 unsigned RegNo,
2068 uint64_t Address,
2069 const void *Decoder) {
2070 if (RegNo > 30 || RegNo %2)
2071 return MCDisassembler::Fail;
2072
2073 unsigned Reg = getReg(Decoder, Mips::AFGR64RegClassID, RegNo /2);
2074 Inst.addOperand(MCOperand::createReg(Reg));
2075 return MCDisassembler::Success;
2076 }
2077
2078 static DecodeStatus DecodeACC64DSPRegisterClass(MCInst &Inst,
2079 unsigned RegNo,
2080 uint64_t Address,
2081 const void *Decoder) {
2082 if (RegNo >= 4)
2083 return MCDisassembler::Fail;
2084
2085 unsigned Reg = getReg(Decoder, Mips::ACC64DSPRegClassID, RegNo);
2086 Inst.addOperand(MCOperand::createReg(Reg));
2087 return MCDisassembler::Success;
2088 }
2089
2090 static DecodeStatus DecodeHI32DSPRegisterClass(MCInst &Inst,
2091 unsigned RegNo,
2092 uint64_t Address,
2093 const void *Decoder) {
2094 if (RegNo >= 4)
2095 return MCDisassembler::Fail;
2096
2097 unsigned Reg = getReg(Decoder, Mips::HI32DSPRegClassID, RegNo);
2098 Inst.addOperand(MCOperand::createReg(Reg));
2099 return MCDisassembler::Success;
2100 }
2101
2102 static DecodeStatus DecodeLO32DSPRegisterClass(MCInst &Inst,
2103 unsigned RegNo,
2104 uint64_t Address,
2105 const void *Decoder) {
2106 if (RegNo >= 4)
2107 return MCDisassembler::Fail;
2108
2109 unsigned Reg = getReg(Decoder, Mips::LO32DSPRegClassID, RegNo);
2110 Inst.addOperand(MCOperand::createReg(Reg));
2111 return MCDisassembler::Success;
2112 }
2113
2114 static DecodeStatus DecodeMSA128BRegisterClass(MCInst &Inst,
2115 unsigned RegNo,
2116 uint64_t Address,
2117 const void *Decoder) {
2118 if (RegNo > 31)
2119 return MCDisassembler::Fail;
2120
2121 unsigned Reg = getReg(Decoder, Mips::MSA128BRegClassID, RegNo);
2122 Inst.addOperand(MCOperand::createReg(Reg));
2123 return MCDisassembler::Success;
2124 }
2125
2126 static DecodeStatus DecodeMSA128HRegisterClass(MCInst &Inst,
2127 unsigned RegNo,
2128 uint64_t Address,
2129 const void *Decoder) {
2130 if (RegNo > 31)
2131 return MCDisassembler::Fail;
2132
2133 unsigned Reg = getReg(Decoder, Mips::MSA128HRegClassID, RegNo);
2134 Inst.addOperand(MCOperand::createReg(Reg));
2135 return MCDisassembler::Success;
2136 }
2137
2138 static DecodeStatus DecodeMSA128WRegisterClass(MCInst &Inst,
2139 unsigned RegNo,
2140 uint64_t Address,
2141 const void *Decoder) {
2142 if (RegNo > 31)
2143 return MCDisassembler::Fail;
2144
2145 unsigned Reg = getReg(Decoder, Mips::MSA128WRegClassID, RegNo);
2146 Inst.addOperand(MCOperand::createReg(Reg));
2147 return MCDisassembler::Success;
2148 }
2149
2150 static DecodeStatus DecodeMSA128DRegisterClass(MCInst &Inst,
2151 unsigned RegNo,
2152 uint64_t Address,
2153 const void *Decoder) {
2154 if (RegNo > 31)
2155 return MCDisassembler::Fail;
2156
2157 unsigned Reg = getReg(Decoder, Mips::MSA128DRegClassID, RegNo);
2158 Inst.addOperand(MCOperand::createReg(Reg));
2159 return MCDisassembler::Success;
2160 }
2161
2162 static DecodeStatus DecodeMSACtrlRegisterClass(MCInst &Inst,
2163 unsigned RegNo,
2164 uint64_t Address,
2165 const void *Decoder) {
2166 if (RegNo > 7)
2167 return MCDisassembler::Fail;
2168
2169 unsigned Reg = getReg(Decoder, Mips::MSACtrlRegClassID, RegNo);
2170 Inst.addOperand(MCOperand::createReg(Reg));
2171 return MCDisassembler::Success;
2172 }
2173
2174 static DecodeStatus DecodeCOP0RegisterClass(MCInst &Inst,
2175 unsigned RegNo,
2176 uint64_t Address,
2177 const void *Decoder) {
2178 if (RegNo > 31)
2179 return MCDisassembler::Fail;
2180
2181 unsigned Reg = getReg(Decoder, Mips::COP0RegClassID, RegNo);
2182 Inst.addOperand(MCOperand::createReg(Reg));
2183 return MCDisassembler::Success;
2184 }
2185
2186 static DecodeStatus DecodeCOP2RegisterClass(MCInst &Inst,
2187 unsigned RegNo,
2188 uint64_t Address,
2189 const void *Decoder) {
2190 if (RegNo > 31)
2191 return MCDisassembler::Fail;
2192
2193 unsigned Reg = getReg(Decoder, Mips::COP2RegClassID, RegNo);
2194 Inst.addOperand(MCOperand::createReg(Reg));
2195 return MCDisassembler::Success;
2196 }
2197
2198 static DecodeStatus DecodeBranchTarget(MCInst &Inst,
2199 unsigned Offset,
2200 uint64_t Address,
2201 const void *Decoder) {
2202 int32_t BranchOffset = (SignExtend32<16>(Offset) * 4) + 4;
2203 Inst.addOperand(MCOperand::createImm(BranchOffset));
2204 return MCDisassembler::Success;
2205 }
2206
2207 static DecodeStatus DecodeBranchTarget1SImm16(MCInst &Inst,
2208 unsigned Offset,
2209 uint64_t Address,
2210 const void *Decoder) {
2211 int32_t BranchOffset = (SignExtend32<16>(Offset) * 2);
2212 Inst.addOperand(MCOperand::createImm(BranchOffset));
2213 return MCDisassembler::Success;
2214 }
2215
2216 static DecodeStatus DecodeJumpTarget(MCInst &Inst,
2217 unsigned Insn,
2218 uint64_t Address,
2219 const void *Decoder) {
2220 unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 2;
2221 Inst.addOperand(MCOperand::createImm(JumpOffset));
2222 return MCDisassembler::Success;
2223 }
2224
2225 static DecodeStatus DecodeBranchTarget21(MCInst &Inst,
2226 unsigned Offset,
2227 uint64_t Address,
2228 const void *Decoder) {
2229 int32_t BranchOffset = SignExtend32<21>(Offset) * 4 + 4;
2230
2231 Inst.addOperand(MCOperand::createImm(BranchOffset));
2232 return MCDisassembler::Success;
2233 }
2234
2235 static DecodeStatus DecodeBranchTarget21MM(MCInst &Inst,
2236 unsigned Offset,
2237 uint64_t Address,
2238 const void *Decoder) {
2239 int32_t BranchOffset = SignExtend32<21>(Offset) * 4 + 4;
2240
2241 Inst.addOperand(MCOperand::createImm(BranchOffset));
2242 return MCDisassembler::Success;
2243 }
2244
2245 static DecodeStatus DecodeBranchTarget26(MCInst &Inst,
2246 unsigned Offset,
2247 uint64_t Address,
2248 const void *Decoder) {
2249 int32_t BranchOffset = SignExtend32<26>(Offset) * 4 + 4;
2250
2251 Inst.addOperand(MCOperand::createImm(BranchOffset));
2252 return MCDisassembler::Success;
2253 }
2254
2255 static DecodeStatus DecodeBranchTarget7MM(MCInst &Inst,
2256 unsigned Offset,
2257 uint64_t Address,
2258 const void *Decoder) {
2259 int32_t BranchOffset = SignExtend32<8>(Offset << 1);
2260 Inst.addOperand(MCOperand::createImm(BranchOffset));
2261 return MCDisassembler::Success;
2262 }
2263
2264 static DecodeStatus DecodeBranchTarget10MM(MCInst &Inst,
2265 unsigned Offset,
2266 uint64_t Address,
2267 const void *Decoder) {
2268 int32_t BranchOffset = SignExtend32<11>(Offset << 1);
2269 Inst.addOperand(MCOperand::createImm(BranchOffset));
2270 return MCDisassembler::Success;
2271 }
2272
2273 static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
2274 unsigned Offset,
2275 uint64_t Address,
2276 const void *Decoder) {
2277 int32_t BranchOffset = SignExtend32<16>(Offset) * 2 + 4;
2278 Inst.addOperand(MCOperand::createImm(BranchOffset));
2279 return MCDisassembler::Success;
2280 }
2281
2282 static DecodeStatus DecodeBranchTarget26MM(MCInst &Inst,
2283 unsigned Offset,
2284 uint64_t Address,
2285 const void *Decoder) {
2286 int32_t BranchOffset = SignExtend32<27>(Offset << 1);
2287
2288 Inst.addOperand(MCOperand::createImm(BranchOffset));
2289 return MCDisassembler::Success;
2290 }
2291
2292 static DecodeStatus DecodeJumpTargetMM(MCInst &Inst,
2293 unsigned Insn,
2294 uint64_t Address,
2295 const void *Decoder) {
2296 unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 1;
2297 Inst.addOperand(MCOperand::createImm(JumpOffset));
2298 return MCDisassembler::Success;
2299 }
2300
2301 static DecodeStatus DecodeJumpTargetXMM(MCInst &Inst,
2302 unsigned Insn,
2303 uint64_t Address,
2304 const void *Decoder) {
2305 unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 2;
2306 Inst.addOperand(MCOperand::createImm(JumpOffset));
2307 return MCDisassembler::Success;
2308 }
2309
2310 static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
2311 unsigned Value,
2312 uint64_t Address,
2313 const void *Decoder) {
2314 if (Value == 0)
2315 Inst.addOperand(MCOperand::createImm(1));
2316 else if (Value == 0x7)
2317 Inst.addOperand(MCOperand::createImm(-1));
2318 else
2319 Inst.addOperand(MCOperand::createImm(Value << 2));
2320 return MCDisassembler::Success;
2321 }
2322
2323 static DecodeStatus DecodeLi16Imm(MCInst &Inst,
2324 unsigned Value,
2325 uint64_t Address,
2326 const void *Decoder) {
2327 if (Value == 0x7F)
2328 Inst.addOperand(MCOperand::createImm(-1));
2329 else
2330 Inst.addOperand(MCOperand::createImm(Value));
2331 return MCDisassembler::Success;
2332 }
2333
2334 static DecodeStatus DecodePOOL16BEncodedField(MCInst &Inst,
2335 unsigned Value,
2336 uint64_t Address,
2337 const void *Decoder) {
2338 Inst.addOperand(MCOperand::createImm(Value == 0x0 ? 8 : Value));
2339 return MCDisassembler::Success;
2340 }
2341
2342 template <unsigned Bits, int Offset, int Scale>
2343 static DecodeStatus DecodeUImmWithOffsetAndScale(MCInst &Inst, unsigned Value,
2344 uint64_t Address,
2345 const void *Decoder) {
2346 Value &= ((1 << Bits) - 1);
2347 Value *= Scale;
2348 Inst.addOperand(MCOperand::createImm(Value + Offset));
2349 return MCDisassembler::Success;
2350 }
2351
2352 template <unsigned Bits, int Offset, int ScaleBy>
2353 static DecodeStatus DecodeSImmWithOffsetAndScale(MCInst &Inst, unsigned Value,
2354 uint64_t Address,
2355 const void *Decoder) {
2356 int32_t Imm = SignExtend32<Bits>(Value) * ScaleBy;
2357 Inst.addOperand(MCOperand::createImm(Imm + Offset));
2358 return MCDisassembler::Success;
2359 }
2360
2361 static DecodeStatus DecodeInsSize(MCInst &Inst,
2362 unsigned Insn,
2363 uint64_t Address,
2364 const void *Decoder) {
2365 // First we need to grab the pos(lsb) from MCInst.
2366 // This function only handles the 32 bit variants of ins, as dins
2367 // variants are handled differently.
2368 int Pos = Inst.getOperand(2).getImm();
2369 int Size = (int) Insn - Pos + 1;
2370 Inst.addOperand(MCOperand::createImm(SignExtend32<16>(Size)));
2371 return MCDisassembler::Success;
2372 }
2373
2374 static DecodeStatus DecodeSimm19Lsl2(MCInst &Inst, unsigned Insn,
2375 uint64_t Address, const void *Decoder) {
2376 Inst.addOperand(MCOperand::createImm(SignExtend32<19>(Insn) * 4));
2377 return MCDisassembler::Success;
2378 }
2379
2380 static DecodeStatus DecodeSimm18Lsl3(MCInst &Inst, unsigned Insn,
2381 uint64_t Address, const void *Decoder) {
2382 Inst.addOperand(MCOperand::createImm(SignExtend32<18>(Insn) * 8));
2383 return MCDisassembler::Success;
2384 }
2385
2386 static DecodeStatus DecodeSimm9SP(MCInst &Inst, unsigned Insn,
2387 uint64_t Address, const void *Decoder) {
2388 int32_t DecodedValue;
2389 switch (Insn) {
2390 case 0: DecodedValue = 256; break;
2391 case 1: DecodedValue = 257; break;
2392 case 510: DecodedValue = -258; break;
2393 case 511: DecodedValue = -257; break;
2394 default: DecodedValue = SignExtend32<9>(Insn); break;
2395 }
2396 Inst.addOperand(MCOperand::createImm(DecodedValue * 4));
2397 return MCDisassembler::Success;
2398 }
2399
2400 static DecodeStatus DecodeANDI16Imm(MCInst &Inst, unsigned Insn,
2401 uint64_t Address, const void *Decoder) {
2402 // Insn must be >= 0, since it is unsigned that condition is always true.
2403 assert(Insn < 16);
2404 int32_t DecodedValues[] = {128, 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64,
2405 255, 32768, 65535};
2406 Inst.addOperand(MCOperand::createImm(DecodedValues[Insn]));
2407 return MCDisassembler::Success;
2408 }
2409
2410 static DecodeStatus DecodeRegListOperand(MCInst &Inst,
2411 unsigned Insn,
2412 uint64_t Address,
2413 const void *Decoder) {
2414 unsigned Regs[] = {Mips::S0, Mips::S1, Mips::S2, Mips::S3, Mips::S4, Mips::S5,
2415 Mips::S6, Mips::S7, Mips::FP};
2416 unsigned RegNum;
2417
2418 unsigned RegLst = fieldFromInstruction(Insn, 21, 5);
2419
2420 // Empty register lists are not allowed.
2421 if (RegLst == 0)
2422 return MCDisassembler::Fail;
2423
2424 RegNum = RegLst & 0xf;
2425
2426 // RegLst values 10-15, and 26-31 are reserved.
2427 if (RegNum > 9)
2428 return MCDisassembler::Fail;
2429
2430 for (unsigned i = 0; i < RegNum; i++)
2431 Inst.addOperand(MCOperand::createReg(Regs[i]));
2432
2433 if (RegLst & 0x10)
2434 Inst.addOperand(MCOperand::createReg(Mips::RA));
2435
2436 return MCDisassembler::Success;
2437 }
2438
2439 static DecodeStatus DecodeRegListOperand16(MCInst &Inst, unsigned Insn,
2440 uint64_t Address,
2441 const void *Decoder) {
2442 unsigned Regs[] = {Mips::S0, Mips::S1, Mips::S2, Mips::S3};
2443 unsigned RegLst;
2444 switch(Inst.getOpcode()) {
2445 default:
2446 RegLst = fieldFromInstruction(Insn, 4, 2);
2447 break;
2448 case Mips::LWM16_MMR6:
2449 case Mips::SWM16_MMR6:
2450 RegLst = fieldFromInstruction(Insn, 8, 2);
2451 break;
2452 }
2453 unsigned RegNum = RegLst & 0x3;
2454
2455 for (unsigned i = 0; i <= RegNum; i++)
2456 Inst.addOperand(MCOperand::createReg(Regs[i]));
2457
2458 Inst.addOperand(MCOperand::createReg(Mips::RA));
2459
2460 return MCDisassembler::Success;
2461 }
2462
2463 static DecodeStatus DecodeMovePOperands(MCInst &Inst, unsigned Insn,
2464 uint64_t Address,
2465 const void *Decoder) {
2466 unsigned RegPair = fieldFromInstruction(Insn, 7, 3);
2467 if (DecodeMovePRegPair(Inst, RegPair, Address, Decoder) ==
2468 MCDisassembler::Fail)
2469 return MCDisassembler::Fail;
2470
2471 unsigned RegRs;
2472 if (static_cast<const MipsDisassembler*>(Decoder)->hasMips32r6())
2473 RegRs = fieldFromInstruction(Insn, 0, 2) |
2474 (fieldFromInstruction(Insn, 3, 1) << 2);
2475 else
2476 RegRs = fieldFromInstruction(Insn, 1, 3);
2477 if (DecodeGPRMM16MovePRegisterClass(Inst, RegRs, Address, Decoder) ==
2478 MCDisassembler::Fail)
2479 return MCDisassembler::Fail;
2480
2481 unsigned RegRt = fieldFromInstruction(Insn, 4, 3);
2482 if (DecodeGPRMM16MovePRegisterClass(Inst, RegRt, Address, Decoder) ==
2483 MCDisassembler::Fail)
2484 return MCDisassembler::Fail;
2485
2486 return MCDisassembler::Success;
2487 }
2488
2489 static DecodeStatus DecodeMovePRegPair(MCInst &Inst, unsigned RegPair,
2490 uint64_t Address, const void *Decoder) {
2491 switch (RegPair) {
2492 default:
2493 return MCDisassembler::Fail;
2494 case 0:
2495 Inst.addOperand(MCOperand::createReg(Mips::A1));
2496 Inst.addOperand(MCOperand::createReg(Mips::A2));
2497 break;
2498 case 1:
2499 Inst.addOperand(MCOperand::createReg(Mips::A1));
2500 Inst.addOperand(MCOperand::createReg(Mips::A3));
2501 break;
2502 case 2:
2503 Inst.addOperand(MCOperand::createReg(Mips::A2));
2504 Inst.addOperand(MCOperand::createReg(Mips::A3));
2505 break;
2506 case 3:
2507 Inst.addOperand(MCOperand::createReg(Mips::A0));
2508 Inst.addOperand(MCOperand::createReg(Mips::S5));
2509 break;
2510 case 4:
2511 Inst.addOperand(MCOperand::createReg(Mips::A0));
2512 Inst.addOperand(MCOperand::createReg(Mips::S6));
2513 break;
2514 case 5:
2515 Inst.addOperand(MCOperand::createReg(Mips::A0));
2516 Inst.addOperand(MCOperand::createReg(Mips::A1));
2517 break;
2518 case 6:
2519 Inst.addOperand(MCOperand::createReg(Mips::A0));
2520 Inst.addOperand(MCOperand::createReg(Mips::A2));
2521 break;
2522 case 7:
2523 Inst.addOperand(MCOperand::createReg(Mips::A0));
2524 Inst.addOperand(MCOperand::createReg(Mips::A3));
2525 break;
2526 }
2527
2528 return MCDisassembler::Success;
2529 }
2530
2531 static DecodeStatus DecodeSimm23Lsl2(MCInst &Inst, unsigned Insn,
2532 uint64_t Address, const void *Decoder) {
2533 Inst.addOperand(MCOperand::createImm(SignExtend32<25>(Insn << 2)));
2534 return MCDisassembler::Success;
2535 }
2536
2537 template <typename InsnType>
2538 static DecodeStatus DecodeBgtzGroupBranchMMR6(MCInst &MI, InsnType insn,
2539 uint64_t Address,
2540 const void *Decoder) {
2541 // We have:
2542 // 0b000111 ttttt sssss iiiiiiiiiiiiiiii
2543 // Invalid if rt == 0
2544 // BGTZALC_MMR6 if rs == 0 && rt != 0
2545 // BLTZALC_MMR6 if rs != 0 && rs == rt
2546 // BLTUC_MMR6 if rs != 0 && rs != rt
2547
2548 InsnType Rt = fieldFromInstruction(insn, 21, 5);
2549 InsnType Rs = fieldFromInstruction(insn, 16, 5);
2550 InsnType Imm = 0;
2551 bool HasRs = false;
2552 bool HasRt = false;
2553
2554 if (Rt == 0)
2555 return MCDisassembler::Fail;
2556 else if (Rs == 0) {
2557 MI.setOpcode(Mips::BGTZALC_MMR6);
2558 HasRt = true;
2559 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
2560 }
2561 else if (Rs == Rt) {
2562 MI.setOpcode(Mips::BLTZALC_MMR6);
2563 HasRs = true;
2564 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
2565 }
2566 else {
2567 MI.setOpcode(Mips::BLTUC_MMR6);
2568 HasRs = true;
2569 HasRt = true;
2570 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
2571 }
2572
2573 if (HasRs)
2574 MI.addOperand(
2575 MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID, Rs)));
2576
2577 if (HasRt)
2578 MI.addOperand(
2579 MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID, Rt)));
2580
2581 MI.addOperand(MCOperand::createImm(Imm));
2582
2583 return MCDisassembler::Success;
2584 }
2585
2586 template <typename InsnType>
2587 static DecodeStatus DecodeBlezGroupBranchMMR6(MCInst &MI, InsnType insn,
2588 uint64_t Address,
2589 const void *Decoder) {
2590 // We have:
2591 // 0b000110 ttttt sssss iiiiiiiiiiiiiiii
2592 // Invalid if rt == 0
2593 // BLEZALC_MMR6 if rs == 0 && rt != 0
2594 // BGEZALC_MMR6 if rs == rt && rt != 0
2595 // BGEUC_MMR6 if rs != rt && rs != 0 && rt != 0
2596
2597 InsnType Rt = fieldFromInstruction(insn, 21, 5);
2598 InsnType Rs = fieldFromInstruction(insn, 16, 5);
2599 InsnType Imm = 0;
2600 bool HasRs = false;
2601
2602 if (Rt == 0)
2603 return MCDisassembler::Fail;
2604 else if (Rs == 0) {
2605 MI.setOpcode(Mips::BLEZALC_MMR6);
2606 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
2607 }
2608 else if (Rs == Rt) {
2609 MI.setOpcode(Mips::BGEZALC_MMR6);
2610 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 2 + 4;
2611 }
2612 else {
2613 HasRs = true;
2614 MI.setOpcode(Mips::BGEUC_MMR6);
2615 Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4 + 4;
2616 }
2617
2618 if (HasRs)
2619 MI.addOperand(
2620 MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID, Rs)));
2621 MI.addOperand(
2622 MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID, Rt)));
2623
2624 MI.addOperand(MCOperand::createImm(Imm));
2625
2626 return MCDisassembler::Success;
2627 }
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