LLVM  14.0.0git
SparcDisassembler.cpp
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1 //===- SparcDisassembler.cpp - Disassembler for Sparc -----------*- C++ -*-===//
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 Sparc Disassembler.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "MCTargetDesc/SparcMCTargetDesc.h"
14 #include "TargetInfo/SparcTargetInfo.h"
15 #include "llvm/MC/MCAsmInfo.h"
16 #include "llvm/MC/MCContext.h"
17 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
18 #include "llvm/MC/MCFixedLenDisassembler.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/Support/TargetRegistry.h"
21 
22 using namespace llvm;
23 
24 #define DEBUG_TYPE "sparc-disassembler"
25 
26 typedef MCDisassembler::DecodeStatus DecodeStatus;
27 
28 namespace {
29 
30 /// A disassembler class for Sparc.
31 class SparcDisassembler : public MCDisassembler {
32 public:
33  SparcDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx)
34  : MCDisassembler(STI, Ctx) {}
35  virtual ~SparcDisassembler() {}
36 
37  DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
38  ArrayRef<uint8_t> Bytes, uint64_t Address,
39  raw_ostream &CStream) const override;
40 };
41 }
42 
43 static MCDisassembler *createSparcDisassembler(const Target &T,
44  const MCSubtargetInfo &STI,
45  MCContext &Ctx) {
46  return new SparcDisassembler(STI, Ctx);
47 }
48 
49 
50 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeSparcDisassembler() {
51  // Register the disassembler.
52  TargetRegistry::RegisterMCDisassembler(getTheSparcTarget(),
53  createSparcDisassembler);
54  TargetRegistry::RegisterMCDisassembler(getTheSparcV9Target(),
55  createSparcDisassembler);
56  TargetRegistry::RegisterMCDisassembler(getTheSparcelTarget(),
57  createSparcDisassembler);
58 }
59 
60 static const unsigned IntRegDecoderTable[] = {
61  SP::G0, SP::G1, SP::G2, SP::G3,
62  SP::G4, SP::G5, SP::G6, SP::G7,
63  SP::O0, SP::O1, SP::O2, SP::O3,
64  SP::O4, SP::O5, SP::O6, SP::O7,
65  SP::L0, SP::L1, SP::L2, SP::L3,
66  SP::L4, SP::L5, SP::L6, SP::L7,
67  SP::I0, SP::I1, SP::I2, SP::I3,
68  SP::I4, SP::I5, SP::I6, SP::I7 };
69 
70 static const unsigned FPRegDecoderTable[] = {
71  SP::F0, SP::F1, SP::F2, SP::F3,
72  SP::F4, SP::F5, SP::F6, SP::F7,
73  SP::F8, SP::F9, SP::F10, SP::F11,
74  SP::F12, SP::F13, SP::F14, SP::F15,
75  SP::F16, SP::F17, SP::F18, SP::F19,
76  SP::F20, SP::F21, SP::F22, SP::F23,
77  SP::F24, SP::F25, SP::F26, SP::F27,
78  SP::F28, SP::F29, SP::F30, SP::F31 };
79 
80 static const unsigned DFPRegDecoderTable[] = {
81  SP::D0, SP::D16, SP::D1, SP::D17,
82  SP::D2, SP::D18, SP::D3, SP::D19,
83  SP::D4, SP::D20, SP::D5, SP::D21,
84  SP::D6, SP::D22, SP::D7, SP::D23,
85  SP::D8, SP::D24, SP::D9, SP::D25,
86  SP::D10, SP::D26, SP::D11, SP::D27,
87  SP::D12, SP::D28, SP::D13, SP::D29,
88  SP::D14, SP::D30, SP::D15, SP::D31 };
89 
90 static const unsigned QFPRegDecoderTable[] = {
91  SP::Q0, SP::Q8, ~0U, ~0U,
92  SP::Q1, SP::Q9, ~0U, ~0U,
93  SP::Q2, SP::Q10, ~0U, ~0U,
94  SP::Q3, SP::Q11, ~0U, ~0U,
95  SP::Q4, SP::Q12, ~0U, ~0U,
96  SP::Q5, SP::Q13, ~0U, ~0U,
97  SP::Q6, SP::Q14, ~0U, ~0U,
98  SP::Q7, SP::Q15, ~0U, ~0U } ;
99 
100 static const unsigned FCCRegDecoderTable[] = {
101  SP::FCC0, SP::FCC1, SP::FCC2, SP::FCC3 };
102 
103 static const unsigned ASRRegDecoderTable[] = {
104  SP::Y, SP::ASR1, SP::ASR2, SP::ASR3,
105  SP::ASR4, SP::ASR5, SP::ASR6, SP::ASR7,
106  SP::ASR8, SP::ASR9, SP::ASR10, SP::ASR11,
107  SP::ASR12, SP::ASR13, SP::ASR14, SP::ASR15,
108  SP::ASR16, SP::ASR17, SP::ASR18, SP::ASR19,
109  SP::ASR20, SP::ASR21, SP::ASR22, SP::ASR23,
110  SP::ASR24, SP::ASR25, SP::ASR26, SP::ASR27,
111  SP::ASR28, SP::ASR29, SP::ASR30, SP::ASR31};
112 
113 static const unsigned PRRegDecoderTable[] = {
114  SP::TPC, SP::TNPC, SP::TSTATE, SP::TT, SP::TICK, SP::TBA, SP::PSTATE,
115  SP::TL, SP::PIL, SP::CWP, SP::CANSAVE, SP::CANRESTORE, SP::CLEANWIN,
116  SP::OTHERWIN, SP::WSTATE, SP::PC
117 };
118 
119 static const uint16_t IntPairDecoderTable[] = {
120  SP::G0_G1, SP::G2_G3, SP::G4_G5, SP::G6_G7,
121  SP::O0_O1, SP::O2_O3, SP::O4_O5, SP::O6_O7,
122  SP::L0_L1, SP::L2_L3, SP::L4_L5, SP::L6_L7,
123  SP::I0_I1, SP::I2_I3, SP::I4_I5, SP::I6_I7,
124 };
125 
126 static const unsigned CPRegDecoderTable[] = {
127  SP::C0, SP::C1, SP::C2, SP::C3,
128  SP::C4, SP::C5, SP::C6, SP::C7,
129  SP::C8, SP::C9, SP::C10, SP::C11,
130  SP::C12, SP::C13, SP::C14, SP::C15,
131  SP::C16, SP::C17, SP::C18, SP::C19,
132  SP::C20, SP::C21, SP::C22, SP::C23,
133  SP::C24, SP::C25, SP::C26, SP::C27,
134  SP::C28, SP::C29, SP::C30, SP::C31
135 };
136 
137 
138 static const uint16_t CPPairDecoderTable[] = {
139  SP::C0_C1, SP::C2_C3, SP::C4_C5, SP::C6_C7,
140  SP::C8_C9, SP::C10_C11, SP::C12_C13, SP::C14_C15,
141  SP::C16_C17, SP::C18_C19, SP::C20_C21, SP::C22_C23,
142  SP::C24_C25, SP::C26_C27, SP::C28_C29, SP::C30_C31
143 };
144 
145 static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst,
146  unsigned RegNo,
147  uint64_t Address,
148  const void *Decoder) {
149  if (RegNo > 31)
150  return MCDisassembler::Fail;
151  unsigned Reg = IntRegDecoderTable[RegNo];
152  Inst.addOperand(MCOperand::createReg(Reg));
153  return MCDisassembler::Success;
154 }
155 
156 static DecodeStatus DecodeI64RegsRegisterClass(MCInst &Inst,
157  unsigned RegNo,
158  uint64_t Address,
159  const void *Decoder) {
160  if (RegNo > 31)
161  return MCDisassembler::Fail;
162  unsigned Reg = IntRegDecoderTable[RegNo];
163  Inst.addOperand(MCOperand::createReg(Reg));
164  return MCDisassembler::Success;
165 }
166 
167 
168 static DecodeStatus DecodeFPRegsRegisterClass(MCInst &Inst,
169  unsigned RegNo,
170  uint64_t Address,
171  const void *Decoder) {
172  if (RegNo > 31)
173  return MCDisassembler::Fail;
174  unsigned Reg = FPRegDecoderTable[RegNo];
175  Inst.addOperand(MCOperand::createReg(Reg));
176  return MCDisassembler::Success;
177 }
178 
179 
180 static DecodeStatus DecodeDFPRegsRegisterClass(MCInst &Inst,
181  unsigned RegNo,
182  uint64_t Address,
183  const void *Decoder) {
184  if (RegNo > 31)
185  return MCDisassembler::Fail;
186  unsigned Reg = DFPRegDecoderTable[RegNo];
187  Inst.addOperand(MCOperand::createReg(Reg));
188  return MCDisassembler::Success;
189 }
190 
191 
192 static DecodeStatus DecodeQFPRegsRegisterClass(MCInst &Inst,
193  unsigned RegNo,
194  uint64_t Address,
195  const void *Decoder) {
196  if (RegNo > 31)
197  return MCDisassembler::Fail;
198 
199  unsigned Reg = QFPRegDecoderTable[RegNo];
200  if (Reg == ~0U)
201  return MCDisassembler::Fail;
202  Inst.addOperand(MCOperand::createReg(Reg));
203  return MCDisassembler::Success;
204 }
205 
206 static DecodeStatus DecodeCPRegsRegisterClass(MCInst &Inst,
207  unsigned RegNo,
208  uint64_t Address,
209  const void *Decoder) {
210  if (RegNo > 31)
211  return MCDisassembler::Fail;
212  unsigned Reg = CPRegDecoderTable[RegNo];
213  Inst.addOperand(MCOperand::createReg(Reg));
214  return MCDisassembler::Success;
215 }
216 
217 static DecodeStatus DecodeFCCRegsRegisterClass(MCInst &Inst, unsigned RegNo,
218  uint64_t Address,
219  const void *Decoder) {
220  if (RegNo > 3)
221  return MCDisassembler::Fail;
222  Inst.addOperand(MCOperand::createReg(FCCRegDecoderTable[RegNo]));
223  return MCDisassembler::Success;
224 }
225 
226 static DecodeStatus DecodeASRRegsRegisterClass(MCInst &Inst, unsigned RegNo,
227  uint64_t Address,
228  const void *Decoder) {
229  if (RegNo > 31)
230  return MCDisassembler::Fail;
231  Inst.addOperand(MCOperand::createReg(ASRRegDecoderTable[RegNo]));
232  return MCDisassembler::Success;
233 }
234 
235 static DecodeStatus DecodePRRegsRegisterClass(MCInst &Inst, unsigned RegNo,
236  uint64_t Address,
237  const void *Decoder) {
238  if (RegNo >= array_lengthof(PRRegDecoderTable))
239  return MCDisassembler::Fail;
240  Inst.addOperand(MCOperand::createReg(PRRegDecoderTable[RegNo]));
241  return MCDisassembler::Success;
242 }
243 
244 static DecodeStatus DecodeIntPairRegisterClass(MCInst &Inst, unsigned RegNo,
245  uint64_t Address, const void *Decoder) {
246  DecodeStatus S = MCDisassembler::Success;
247 
248  if (RegNo > 31)
249  return MCDisassembler::Fail;
250 
251  if ((RegNo & 1))
252  S = MCDisassembler::SoftFail;
253 
254  unsigned RegisterPair = IntPairDecoderTable[RegNo/2];
255  Inst.addOperand(MCOperand::createReg(RegisterPair));
256  return S;
257 }
258 
259 static DecodeStatus DecodeCPPairRegisterClass(MCInst &Inst, unsigned RegNo,
260  uint64_t Address, const void *Decoder) {
261  if (RegNo > 31)
262  return MCDisassembler::Fail;
263 
264  unsigned RegisterPair = CPPairDecoderTable[RegNo/2];
265  Inst.addOperand(MCOperand::createReg(RegisterPair));
266  return MCDisassembler::Success;
267 }
268 
269 static DecodeStatus DecodeLoadInt(MCInst &Inst, unsigned insn, uint64_t Address,
270  const void *Decoder);
271 static DecodeStatus DecodeLoadIntPair(MCInst &Inst, unsigned insn, uint64_t Address,
272  const void *Decoder);
273 static DecodeStatus DecodeLoadFP(MCInst &Inst, unsigned insn, uint64_t Address,
274  const void *Decoder);
275 static DecodeStatus DecodeLoadDFP(MCInst &Inst, unsigned insn, uint64_t Address,
276  const void *Decoder);
277 static DecodeStatus DecodeLoadQFP(MCInst &Inst, unsigned insn, uint64_t Address,
278  const void *Decoder);
279 static DecodeStatus DecodeLoadCP(MCInst &Inst, unsigned insn, uint64_t Address,
280  const void *Decoder);
281 static DecodeStatus DecodeLoadCPPair(MCInst &Inst, unsigned insn, uint64_t Address,
282  const void *Decoder);
283 static DecodeStatus DecodeStoreInt(MCInst &Inst, unsigned insn,
284  uint64_t Address, const void *Decoder);
285 static DecodeStatus DecodeStoreIntPair(MCInst &Inst, unsigned insn,
286  uint64_t Address, const void *Decoder);
287 static DecodeStatus DecodeStoreFP(MCInst &Inst, unsigned insn,
288  uint64_t Address, const void *Decoder);
289 static DecodeStatus DecodeStoreDFP(MCInst &Inst, unsigned insn,
290  uint64_t Address, const void *Decoder);
291 static DecodeStatus DecodeStoreQFP(MCInst &Inst, unsigned insn,
292  uint64_t Address, const void *Decoder);
293 static DecodeStatus DecodeStoreCP(MCInst &Inst, unsigned insn,
294  uint64_t Address, const void *Decoder);
295 static DecodeStatus DecodeStoreCPPair(MCInst &Inst, unsigned insn,
296  uint64_t Address, const void *Decoder);
297 static DecodeStatus DecodeCall(MCInst &Inst, unsigned insn,
298  uint64_t Address, const void *Decoder);
299 static DecodeStatus DecodeSIMM13(MCInst &Inst, unsigned insn,
300  uint64_t Address, const void *Decoder);
301 static DecodeStatus DecodeJMPL(MCInst &Inst, unsigned insn, uint64_t Address,
302  const void *Decoder);
303 static DecodeStatus DecodeReturn(MCInst &MI, unsigned insn, uint64_t Address,
304  const void *Decoder);
305 static DecodeStatus DecodeSWAP(MCInst &Inst, unsigned insn, uint64_t Address,
306  const void *Decoder);
307 static DecodeStatus DecodeTRAP(MCInst &Inst, unsigned insn, uint64_t Address,
308  const void *Decoder);
309 
310 #include "SparcGenDisassemblerTables.inc"
311 
312 /// Read four bytes from the ArrayRef and return 32 bit word.
313 static DecodeStatus readInstruction32(ArrayRef<uint8_t> Bytes, uint64_t Address,
314  uint64_t &Size, uint32_t &Insn,
315  bool IsLittleEndian) {
316  // We want to read exactly 4 Bytes of data.
317  if (Bytes.size() < 4) {
318  Size = 0;
319  return MCDisassembler::Fail;
320  }
321 
322  Insn = IsLittleEndian
323  ? (Bytes[0] << 0) | (Bytes[1] << 8) | (Bytes[2] << 16) |
324  (Bytes[3] << 24)
325  : (Bytes[3] << 0) | (Bytes[2] << 8) | (Bytes[1] << 16) |
326  (Bytes[0] << 24);
327 
328  return MCDisassembler::Success;
329 }
330 
331 DecodeStatus SparcDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
332  ArrayRef<uint8_t> Bytes,
333  uint64_t Address,
334  raw_ostream &CStream) const {
335  uint32_t Insn;
336  bool isLittleEndian = getContext().getAsmInfo()->isLittleEndian();
337  DecodeStatus Result =
338  readInstruction32(Bytes, Address, Size, Insn, isLittleEndian);
339  if (Result == MCDisassembler::Fail)
340  return MCDisassembler::Fail;
341 
342  // Calling the auto-generated decoder function.
343 
344  if (STI.getFeatureBits()[Sparc::FeatureV9])
345  {
346  Result = decodeInstruction(DecoderTableSparcV932, Instr, Insn, Address, this, STI);
347  }
348  else
349  {
350  Result = decodeInstruction(DecoderTableSparcV832, Instr, Insn, Address, this, STI);
351  }
352  if (Result != MCDisassembler::Fail)
353  return Result;
354 
355  Result =
356  decodeInstruction(DecoderTableSparc32, Instr, Insn, Address, this, STI);
357 
358  if (Result != MCDisassembler::Fail) {
359  Size = 4;
360  return Result;
361  }
362 
363  return MCDisassembler::Fail;
364 }
365 
366 
367 typedef DecodeStatus (*DecodeFunc)(MCInst &MI, unsigned insn, uint64_t Address,
368  const void *Decoder);
369 
370 static DecodeStatus DecodeMem(MCInst &MI, unsigned insn, uint64_t Address,
371  const void *Decoder,
372  bool isLoad, DecodeFunc DecodeRD) {
373  unsigned rd = fieldFromInstruction(insn, 25, 5);
374  unsigned rs1 = fieldFromInstruction(insn, 14, 5);
375  bool isImm = fieldFromInstruction(insn, 13, 1);
376  bool hasAsi = fieldFromInstruction(insn, 23, 1); // (in op3 field)
377  unsigned asi = fieldFromInstruction(insn, 5, 8);
378  unsigned rs2 = 0;
379  unsigned simm13 = 0;
380  if (isImm)
381  simm13 = SignExtend32<13>(fieldFromInstruction(insn, 0, 13));
382  else
383  rs2 = fieldFromInstruction(insn, 0, 5);
384 
385  DecodeStatus status;
386  if (isLoad) {
387  status = DecodeRD(MI, rd, Address, Decoder);
388  if (status != MCDisassembler::Success)
389  return status;
390  }
391 
392  // Decode rs1.
393  status = DecodeIntRegsRegisterClass(MI, rs1, Address, Decoder);
394  if (status != MCDisassembler::Success)
395  return status;
396 
397  // Decode imm|rs2.
398  if (isImm)
399  MI.addOperand(MCOperand::createImm(simm13));
400  else {
401  status = DecodeIntRegsRegisterClass(MI, rs2, Address, Decoder);
402  if (status != MCDisassembler::Success)
403  return status;
404  }
405 
406  if (hasAsi)
407  MI.addOperand(MCOperand::createImm(asi));
408 
409  if (!isLoad) {
410  status = DecodeRD(MI, rd, Address, Decoder);
411  if (status != MCDisassembler::Success)
412  return status;
413  }
414  return MCDisassembler::Success;
415 }
416 
417 static DecodeStatus DecodeLoadInt(MCInst &Inst, unsigned insn, uint64_t Address,
418  const void *Decoder) {
419  return DecodeMem(Inst, insn, Address, Decoder, true,
420  DecodeIntRegsRegisterClass);
421 }
422 
423 static DecodeStatus DecodeLoadIntPair(MCInst &Inst, unsigned insn, uint64_t Address,
424  const void *Decoder) {
425  return DecodeMem(Inst, insn, Address, Decoder, true,
426  DecodeIntPairRegisterClass);
427 }
428 
429 static DecodeStatus DecodeLoadFP(MCInst &Inst, unsigned insn, uint64_t Address,
430  const void *Decoder) {
431  return DecodeMem(Inst, insn, Address, Decoder, true,
432  DecodeFPRegsRegisterClass);
433 }
434 
435 static DecodeStatus DecodeLoadDFP(MCInst &Inst, unsigned insn, uint64_t Address,
436  const void *Decoder) {
437  return DecodeMem(Inst, insn, Address, Decoder, true,
438  DecodeDFPRegsRegisterClass);
439 }
440 
441 static DecodeStatus DecodeLoadQFP(MCInst &Inst, unsigned insn, uint64_t Address,
442  const void *Decoder) {
443  return DecodeMem(Inst, insn, Address, Decoder, true,
444  DecodeQFPRegsRegisterClass);
445 }
446 
447 static DecodeStatus DecodeLoadCP(MCInst &Inst, unsigned insn, uint64_t Address,
448  const void *Decoder) {
449  return DecodeMem(Inst, insn, Address, Decoder, true,
450  DecodeCPRegsRegisterClass);
451 }
452 
453 static DecodeStatus DecodeLoadCPPair(MCInst &Inst, unsigned insn, uint64_t Address,
454  const void *Decoder) {
455  return DecodeMem(Inst, insn, Address, Decoder, true,
456  DecodeCPPairRegisterClass);
457 }
458 
459 static DecodeStatus DecodeStoreInt(MCInst &Inst, unsigned insn,
460  uint64_t Address, const void *Decoder) {
461  return DecodeMem(Inst, insn, Address, Decoder, false,
462  DecodeIntRegsRegisterClass);
463 }
464 
465 static DecodeStatus DecodeStoreIntPair(MCInst &Inst, unsigned insn,
466  uint64_t Address, const void *Decoder) {
467  return DecodeMem(Inst, insn, Address, Decoder, false,
468  DecodeIntPairRegisterClass);
469 }
470 
471 static DecodeStatus DecodeStoreFP(MCInst &Inst, unsigned insn, uint64_t Address,
472  const void *Decoder) {
473  return DecodeMem(Inst, insn, Address, Decoder, false,
474  DecodeFPRegsRegisterClass);
475 }
476 
477 static DecodeStatus DecodeStoreDFP(MCInst &Inst, unsigned insn,
478  uint64_t Address, const void *Decoder) {
479  return DecodeMem(Inst, insn, Address, Decoder, false,
480  DecodeDFPRegsRegisterClass);
481 }
482 
483 static DecodeStatus DecodeStoreQFP(MCInst &Inst, unsigned insn,
484  uint64_t Address, const void *Decoder) {
485  return DecodeMem(Inst, insn, Address, Decoder, false,
486  DecodeQFPRegsRegisterClass);
487 }
488 
489 static DecodeStatus DecodeStoreCP(MCInst &Inst, unsigned insn,
490  uint64_t Address, const void *Decoder) {
491  return DecodeMem(Inst, insn, Address, Decoder, false,
492  DecodeCPRegsRegisterClass);
493 }
494 
495 static DecodeStatus DecodeStoreCPPair(MCInst &Inst, unsigned insn,
496  uint64_t Address, const void *Decoder) {
497  return DecodeMem(Inst, insn, Address, Decoder, false,
498  DecodeCPPairRegisterClass);
499 }
500 
501 static bool tryAddingSymbolicOperand(int64_t Value, bool isBranch,
502  uint64_t Address, uint64_t Offset,
503  uint64_t Width, MCInst &MI,
504  const void *Decoder) {
505  const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
506  return Dis->tryAddingSymbolicOperand(MI, Value, Address, isBranch,
507  Offset, Width);
508 }
509 
510 static DecodeStatus DecodeCall(MCInst &MI, unsigned insn,
511  uint64_t Address, const void *Decoder) {
512  unsigned tgt = fieldFromInstruction(insn, 0, 30);
513  tgt <<= 2;
514  if (!tryAddingSymbolicOperand(tgt+Address, false, Address,
515  0, 30, MI, Decoder))
516  MI.addOperand(MCOperand::createImm(tgt));
517  return MCDisassembler::Success;
518 }
519 
520 static DecodeStatus DecodeSIMM13(MCInst &MI, unsigned insn,
521  uint64_t Address, const void *Decoder) {
522  unsigned tgt = SignExtend32<13>(fieldFromInstruction(insn, 0, 13));
523  MI.addOperand(MCOperand::createImm(tgt));
524  return MCDisassembler::Success;
525 }
526 
527 static DecodeStatus DecodeJMPL(MCInst &MI, unsigned insn, uint64_t Address,
528  const void *Decoder) {
529 
530  unsigned rd = fieldFromInstruction(insn, 25, 5);
531  unsigned rs1 = fieldFromInstruction(insn, 14, 5);
532  unsigned isImm = fieldFromInstruction(insn, 13, 1);
533  unsigned rs2 = 0;
534  unsigned simm13 = 0;
535  if (isImm)
536  simm13 = SignExtend32<13>(fieldFromInstruction(insn, 0, 13));
537  else
538  rs2 = fieldFromInstruction(insn, 0, 5);
539 
540  // Decode RD.
541  DecodeStatus status = DecodeIntRegsRegisterClass(MI, rd, Address, Decoder);
542  if (status != MCDisassembler::Success)
543  return status;
544 
545  // Decode RS1.
546  status = DecodeIntRegsRegisterClass(MI, rs1, Address, Decoder);
547  if (status != MCDisassembler::Success)
548  return status;
549 
550  // Decode RS1 | SIMM13.
551  if (isImm)
552  MI.addOperand(MCOperand::createImm(simm13));
553  else {
554  status = DecodeIntRegsRegisterClass(MI, rs2, Address, Decoder);
555  if (status != MCDisassembler::Success)
556  return status;
557  }
558  return MCDisassembler::Success;
559 }
560 
561 static DecodeStatus DecodeReturn(MCInst &MI, unsigned insn, uint64_t Address,
562  const void *Decoder) {
563 
564  unsigned rs1 = fieldFromInstruction(insn, 14, 5);
565  unsigned isImm = fieldFromInstruction(insn, 13, 1);
566  unsigned rs2 = 0;
567  unsigned simm13 = 0;
568  if (isImm)
569  simm13 = SignExtend32<13>(fieldFromInstruction(insn, 0, 13));
570  else
571  rs2 = fieldFromInstruction(insn, 0, 5);
572 
573  // Decode RS1.
574  DecodeStatus status = DecodeIntRegsRegisterClass(MI, rs1, Address, Decoder);
575  if (status != MCDisassembler::Success)
576  return status;
577 
578  // Decode RS2 | SIMM13.
579  if (isImm)
580  MI.addOperand(MCOperand::createImm(simm13));
581  else {
582  status = DecodeIntRegsRegisterClass(MI, rs2, Address, Decoder);
583  if (status != MCDisassembler::Success)
584  return status;
585  }
586  return MCDisassembler::Success;
587 }
588 
589 static DecodeStatus DecodeSWAP(MCInst &MI, unsigned insn, uint64_t Address,
590  const void *Decoder) {
591 
592  unsigned rd = fieldFromInstruction(insn, 25, 5);
593  unsigned rs1 = fieldFromInstruction(insn, 14, 5);
594  unsigned isImm = fieldFromInstruction(insn, 13, 1);
595  bool hasAsi = fieldFromInstruction(insn, 23, 1); // (in op3 field)
596  unsigned asi = fieldFromInstruction(insn, 5, 8);
597  unsigned rs2 = 0;
598  unsigned simm13 = 0;
599  if (isImm)
600  simm13 = SignExtend32<13>(fieldFromInstruction(insn, 0, 13));
601  else
602  rs2 = fieldFromInstruction(insn, 0, 5);
603 
604  // Decode RD.
605  DecodeStatus status = DecodeIntRegsRegisterClass(MI, rd, Address, Decoder);
606  if (status != MCDisassembler::Success)
607  return status;
608 
609  // Decode RS1.
610  status = DecodeIntRegsRegisterClass(MI, rs1, Address, Decoder);
611  if (status != MCDisassembler::Success)
612  return status;
613 
614  // Decode RS1 | SIMM13.
615  if (isImm)
616  MI.addOperand(MCOperand::createImm(simm13));
617  else {
618  status = DecodeIntRegsRegisterClass(MI, rs2, Address, Decoder);
619  if (status != MCDisassembler::Success)
620  return status;
621  }
622 
623  if (hasAsi)
624  MI.addOperand(MCOperand::createImm(asi));
625 
626  return MCDisassembler::Success;
627 }
628 
629 static DecodeStatus DecodeTRAP(MCInst &MI, unsigned insn, uint64_t Address,
630  const void *Decoder) {
631 
632  unsigned rs1 = fieldFromInstruction(insn, 14, 5);
633  unsigned isImm = fieldFromInstruction(insn, 13, 1);
634  unsigned cc =fieldFromInstruction(insn, 25, 4);
635  unsigned rs2 = 0;
636  unsigned imm7 = 0;
637  if (isImm)
638  imm7 = fieldFromInstruction(insn, 0, 7);
639  else
640  rs2 = fieldFromInstruction(insn, 0, 5);
641 
642  // Decode RS1.
643  DecodeStatus status = DecodeIntRegsRegisterClass(MI, rs1, Address, Decoder);
644  if (status != MCDisassembler::Success)
645  return status;
646 
647  // Decode RS1 | IMM7.
648  if (isImm)
649  MI.addOperand(MCOperand::createImm(imm7));
650  else {
651  status = DecodeIntRegsRegisterClass(MI, rs2, Address, Decoder);
652  if (status != MCDisassembler::Success)
653  return status;
654  }
655 
656  // Decode CC
657  MI.addOperand(MCOperand::createImm(cc));
658 
659  return MCDisassembler::Success;
660 }
llvm::Check::Size
@ Size
Definition: FileCheck.h:73
DecodeFCCRegsRegisterClass
static DecodeStatus DecodeFCCRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:217
MCFixedLenDisassembler.h
L5
to esp esp setne al movzbw ax esp setg cl movzbw cx cmove cx cl jne LBB1_2 esp which is much esp edx eax decl edx jle L7 L5
Definition: README.txt:656
SparcTargetInfo.h
MI
IRTranslator LLVM IR MI
Definition: IRTranslator.cpp:103
llvm
---------------------— PointerInfo ------------------------------------—
Definition: AllocatorList.h:23
Reg
unsigned Reg
Definition: MachineSink.cpp:1566
IntPairDecoderTable
static const uint16_t IntPairDecoderTable[]
Definition: SparcDisassembler.cpp:119
DecodeLoadInt
static DecodeStatus DecodeLoadInt(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:417
MCDisassembler.h
llvm::MCOperand::createImm
static MCOperand createImm(int64_t Val)
Definition: MCInst.h:141
llvm::MCContext
Context object for machine code objects.
Definition: MCContext.h:72
SparcMCTargetDesc.h
DecodeCPPairRegisterClass
static DecodeStatus DecodeCPPairRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:259
C1
instcombine should handle this C2 when C1
Definition: README.txt:263
llvm::Target
Target - Wrapper for Target specific information.
Definition: TargetRegistry.h:137
cc
src override malloc cc
Definition: CMakeLists.txt:93
tryAddingSymbolicOperand
static bool tryAddingSymbolicOperand(int64_t Value, bool isBranch, uint64_t Address, uint64_t Offset, uint64_t Width, MCInst &MI, const void *Decoder)
Definition: SparcDisassembler.cpp:501
llvm::getTheSparcTarget
Target & getTheSparcTarget()
Definition: SparcTargetInfo.cpp:13
llvm::MCDisassembler::SoftFail
@ SoftFail
Definition: MCDisassembler.h:102
DecodeSWAP
static DecodeStatus DecodeSWAP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:589
llvm::TargetRegistry::RegisterMCDisassembler
static void RegisterMCDisassembler(Target &T, Target::MCDisassemblerCtorTy Fn)
RegisterMCDisassembler - Register a MCDisassembler implementation for the given target.
Definition: TargetRegistry.h:916
Offset
uint64_t Offset
Definition: ELFObjHandler.cpp:81
llvm::MCInst
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
DecodeLoadCP
static DecodeStatus DecodeLoadCP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:447
PRRegDecoderTable
static const unsigned PRRegDecoderTable[]
Definition: SparcDisassembler.cpp:113
DecodeStoreDFP
static DecodeStatus DecodeStoreDFP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:477
DecodeStoreFP
static DecodeStatus DecodeStoreFP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:471
DecodeDFPRegsRegisterClass
static DecodeStatus DecodeDFPRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:180
DecodeLoadCPPair
static DecodeStatus DecodeLoadCPPair(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:453
L2
add sub stmia L5 ldr L2
Definition: README.txt:201
DecodeSIMM13
static DecodeStatus DecodeSIMM13(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:520
L3
AMD64 Optimization Manual has some nice information about optimizing integer multiplication by a constant How much of it applies to Intel s X86 implementation There are definite trade offs to xmm0 cvttss2siq rdx jb L3 subss xmm0 rax cvttss2siq rdx xorq rdx L3
Definition: README-X86-64.txt:22
DecodeLoadDFP
static DecodeStatus DecodeLoadDFP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:435
CPPairDecoderTable
static const uint16_t CPPairDecoderTable[]
Definition: SparcDisassembler.cpp:138
MCContext.h
DecodeFPRegsRegisterClass
static DecodeStatus DecodeFPRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:168
Y
static GCMetadataPrinterRegistry::Add< OcamlGCMetadataPrinter > Y("ocaml", "ocaml 3.10-compatible collector")
llvm::ms_demangle::QualifierMangleMode::Result
@ Result
llvm::MCDisassembler::Success
@ Success
Definition: MCDisassembler.h:103
MCInst.h
llvm::getTheSparcelTarget
Target & getTheSparcelTarget()
Definition: SparcTargetInfo.cpp:21
readInstruction32
static DecodeStatus readInstruction32(ArrayRef< uint8_t > Bytes, uint64_t Address, uint64_t &Size, uint32_t &Insn, bool IsLittleEndian)
Read four bytes from the ArrayRef and return 32 bit word.
Definition: SparcDisassembler.cpp:313
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:53
DecodeLoadQFP
static DecodeStatus DecodeLoadQFP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:441
llvm::array_lengthof
constexpr size_t array_lengthof(T(&)[N])
Find the length of an array.
Definition: STLExtras.h:1390
DecodeStatus
MCDisassembler::DecodeStatus DecodeStatus
Definition: SparcDisassembler.cpp:26
llvm::MCDisassembler::DecodeStatus
DecodeStatus
Ternary decode status.
Definition: MCDisassembler.h:100
L6
gets compiled into this on rsp movaps rsp movaps rsp movaps rsp movaps rsp movaps rsp movaps rsp movaps rsp movaps rsp movq rsp movq rsp movq rsp movq rsp movq rsp rax movq rsp rax movq rsp rsp rsp eax eax jbe LBB1_3 rcx rax movq rsp eax rsp ret ecx eax rcx movl rsp jmp LBB1_2 gcc rsp rax movq rsp rsp movq rsp rax movq rsp eax eax jb L6 rdx eax rsp ret p2align L6
Definition: README.txt:1168
llvm::MCInst::addOperand
void addOperand(const MCOperand Op)
Definition: MCInst.h:210
LLVMInitializeSparcDisassembler
LLVM_EXTERNAL_VISIBILITY void LLVMInitializeSparcDisassembler()
Definition: SparcDisassembler.cpp:50
uint64_t
LLVM_EXTERNAL_VISIBILITY
#define LLVM_EXTERNAL_VISIBILITY
Definition: Compiler.h:132
DecodeASRRegsRegisterClass
static DecodeStatus DecodeASRRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:226
llvm::MCDisassembler
Superclass for all disassemblers.
Definition: MCDisassembler.h:76
llvm::HighlightColor::Address
@ Address
DecodeReturn
static DecodeStatus DecodeReturn(MCInst &MI, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:561
FCCRegDecoderTable
static const unsigned FCCRegDecoderTable[]
Definition: SparcDisassembler.cpp:100
DecodeLoadFP
static DecodeStatus DecodeLoadFP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:429
isBranch
static bool isBranch(unsigned Opcode)
Definition: R600InstrInfo.cpp:647
llvm::MCDisassembler::tryAddingSymbolicOperand
bool tryAddingSymbolicOperand(MCInst &Inst, int64_t Value, uint64_t Address, bool IsBranch, uint64_t Offset, uint64_t InstSize) const
Definition: MCDisassembler.cpp:26
DecodeFunc
DecodeStatus(* DecodeFunc)(MCInst &MI, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:367
DecodeCPRegsRegisterClass
static DecodeStatus DecodeCPRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:206
DecodeIntPairRegisterClass
static DecodeStatus DecodeIntPairRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:244
DecodeStoreCPPair
static DecodeStatus DecodeStoreCPPair(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:495
llvm::ArrayRef< uint8_t >
MCAsmInfo.h
isLoad
static bool isLoad(int Opcode)
Definition: ARCInstrInfo.cpp:53
DecodeJMPL
static DecodeStatus DecodeJMPL(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:527
llvm::MCOperand::createReg
static MCOperand createReg(unsigned Reg)
Definition: MCInst.h:134
uint32_t
S
add sub stmia L5 ldr r0 bl L_printf $stub Instead of a and a wouldn t it be better to do three moves *Return an aggregate type is even return S
Definition: README.txt:210
llvm::MCDisassembler::Fail
@ Fail
Definition: MCDisassembler.h:101
ASRRegDecoderTable
static const unsigned ASRRegDecoderTable[]
Definition: SparcDisassembler.cpp:103
FPRegDecoderTable
static const unsigned FPRegDecoderTable[]
Definition: SparcDisassembler.cpp:70
CPRegDecoderTable
static const unsigned CPRegDecoderTable[]
Definition: SparcDisassembler.cpp:126
L4
to esp esp setne al movzbw ax esp setg cl movzbw cx cmove cx cl jne LBB1_2 esp which is much esp edx eax decl edx jle L7 esp ret eax ja L5 L4
Definition: README.txt:662
DecodeQFPRegsRegisterClass
static DecodeStatus DecodeQFPRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:192
DFPRegDecoderTable
static const unsigned DFPRegDecoderTable[]
Definition: SparcDisassembler.cpp:80
DecodeStoreQFP
static DecodeStatus DecodeStoreQFP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:483
DecodeTRAP
static DecodeStatus DecodeTRAP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:629
uint16_t
DecodeStoreInt
static DecodeStatus DecodeStoreInt(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:459
DecodeCall
static DecodeStatus DecodeCall(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:510
IntRegDecoderTable
static const unsigned IntRegDecoderTable[]
Definition: SparcDisassembler.cpp:60
llvm::AMDGPU::Hwreg::Width
Width
Definition: SIDefines.h:410
L7
to esp esp setne al movzbw ax esp setg cl movzbw cx cmove cx cl jne LBB1_2 esp which is much esp edx eax decl edx jle L7 esp ret L7
Definition: README.txt:658
QFPRegDecoderTable
static const unsigned QFPRegDecoderTable[]
Definition: SparcDisassembler.cpp:90
llvm::sys::fs::status
std::error_code status(const Twine &path, file_status &result, bool follow=true)
Get file status as if by POSIX stat().
DecodeStoreCP
static DecodeStatus DecodeStoreCP(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:489
llvm::ArrayRef::size
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:165
DecodeLoadIntPair
static DecodeStatus DecodeLoadIntPair(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:423
DecodeStoreIntPair
static DecodeStatus DecodeStoreIntPair(MCInst &Inst, unsigned insn, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:465
TargetRegistry.h
llvm::MCSubtargetInfo
Generic base class for all target subtargets.
Definition: MCSubtargetInfo.h:75
DecodeMem
static DecodeStatus DecodeMem(MCInst &MI, unsigned insn, uint64_t Address, const void *Decoder, bool isLoad, DecodeFunc DecodeRD)
Definition: SparcDisassembler.cpp:370
llvm::Value
LLVM Value Representation.
Definition: Value.h:75
DecodePRRegsRegisterClass
static DecodeStatus DecodePRRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:235
DecodeI64RegsRegisterClass
static DecodeStatus DecodeI64RegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:156
llvm::getTheSparcV9Target
Target & getTheSparcV9Target()
Definition: SparcTargetInfo.cpp:17
DecodeIntRegsRegisterClass
static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const void *Decoder)
Definition: SparcDisassembler.cpp:145
createSparcDisassembler
static MCDisassembler * createSparcDisassembler(const Target &T, const MCSubtargetInfo &STI, MCContext &Ctx)
Definition: SparcDisassembler.cpp:43
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