1 //===- HexagonDisassembler.cpp - Disassembler for Hexagon ISA -------------===//
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 #include "MCTargetDesc/HexagonBaseInfo.h"
10 #include "MCTargetDesc/HexagonMCChecker.h"
11 #include "MCTargetDesc/HexagonMCInstrInfo.h"
12 #include "MCTargetDesc/HexagonMCTargetDesc.h"
13 #include "TargetInfo/HexagonTargetInfo.h"
14 #include "llvm/ADT/ArrayRef.h"
15 #include "llvm/ADT/STLExtras.h"
16 #include "llvm/MC/MCContext.h"
17 #include "llvm/MC/MCDecoderOps.h"
18 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCInstrInfo.h"
22 #include "llvm/MC/MCRegisterInfo.h"
23 #include "llvm/MC/MCSubtargetInfo.h"
24 #include "llvm/MC/TargetRegistry.h"
25 #include "llvm/Support/Endian.h"
26 #include "llvm/Support/MathExtras.h"
27 #include "llvm/Support/raw_ostream.h"
28 #include <cassert>
29 #include <cstddef>
30 #include <cstdint>
31 #include <memory>
32
33 #define DEBUG_TYPE "hexagon-disassembler"
34
35 using namespace llvm;
36 using namespace Hexagon;
37
38 using DecodeStatus = MCDisassembler::DecodeStatus;
39
40 namespace {
41
42 /// Hexagon disassembler for all Hexagon platforms.
43 class HexagonDisassembler : public MCDisassembler {
44 public:
45 std::unique_ptr<MCInstrInfo const> const MCII;
46 std::unique_ptr<MCInst *> CurrentBundle;
47 mutable MCInst const *CurrentExtender;
48
HexagonDisassembler(const MCSubtargetInfo & STI,MCContext & Ctx,MCInstrInfo const * MCII)49 HexagonDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx,
50 MCInstrInfo const *MCII)
51 : MCDisassembler(STI, Ctx), MCII(MCII), CurrentBundle(new MCInst *),
52 CurrentExtender(nullptr) {}
53
54 DecodeStatus getSingleInstruction(MCInst &Instr, MCInst &MCB,
55 ArrayRef<uint8_t> Bytes, uint64_t Address,
56 raw_ostream &CStream, bool &Complete) const;
57 DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
58 ArrayRef<uint8_t> Bytes, uint64_t Address,
59 raw_ostream &CStream) const override;
60 void remapInstruction(MCInst &Instr) const;
61 };
62
fullValue(HexagonDisassembler const & Disassembler,MCInst & MI,int64_t Value)63 static uint64_t fullValue(HexagonDisassembler const &Disassembler, MCInst &MI,
64 int64_t Value) {
65 MCInstrInfo MCII = *Disassembler.MCII;
66 if (!Disassembler.CurrentExtender ||
67 MI.size() != HexagonMCInstrInfo::getExtendableOp(MCII, MI))
68 return Value;
69 unsigned Alignment = HexagonMCInstrInfo::getExtentAlignment(MCII, MI);
70 uint32_t Lower6 = static_cast<uint32_t>(Value >> Alignment) & 0x3f;
71 int64_t Bits;
72 bool Success =
73 Disassembler.CurrentExtender->getOperand(0).getExpr()->evaluateAsAbsolute(
74 Bits);
75 assert(Success);
76 (void)Success;
77 uint64_t Upper26 = static_cast<uint64_t>(Bits);
78 uint64_t Operand = Upper26 | Lower6;
79 return Operand;
80 }
disassembler(const MCDisassembler * Decoder)81 static HexagonDisassembler const &disassembler(const MCDisassembler *Decoder) {
82 return *static_cast<HexagonDisassembler const *>(Decoder);
83 }
84 template <size_t T>
signedDecoder(MCInst & MI,unsigned tmp,const MCDisassembler * Decoder)85 static void signedDecoder(MCInst &MI, unsigned tmp,
86 const MCDisassembler *Decoder) {
87 HexagonDisassembler const &Disassembler = disassembler(Decoder);
88 int64_t FullValue = fullValue(Disassembler, MI, SignExtend64<T>(tmp));
89 int64_t Extended = SignExtend64<32>(FullValue);
90 HexagonMCInstrInfo::addConstant(MI, Extended, Disassembler.getContext());
91 }
92 }
93
94 // Forward declare these because the auto-generated code will reference them.
95 // Definitions are further down.
96
97 static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo,
98 uint64_t Address,
99 const MCDisassembler *Decoder);
100 static DecodeStatus
101 DecodeGeneralSubRegsRegisterClass(MCInst &Inst, unsigned RegNo,
102 uint64_t Address,
103 const MCDisassembler *Decoder);
104 static DecodeStatus
105 DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
106 const MCDisassembler *Decoder);
107 static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo,
108 uint64_t Address,
109 const MCDisassembler *Decoder);
110 static DecodeStatus
111 DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
112 const MCDisassembler *Decoder);
113 static DecodeStatus
114 DecodeGeneralDoubleLow8RegsRegisterClass(MCInst &Inst, unsigned RegNo,
115 uint64_t Address,
116 const MCDisassembler *Decoder);
117 static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo,
118 uint64_t Address,
119 const MCDisassembler *Decoder);
120 static DecodeStatus DecodeHvxVQRRegisterClass(MCInst &Inst, unsigned RegNo,
121 uint64_t Address,
122 const MCDisassembler *Decoder);
123 static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
124 uint64_t Address,
125 const MCDisassembler *Decoder);
126 static DecodeStatus DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo,
127 uint64_t Address,
128 const MCDisassembler *Decoder);
129 static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo,
130 uint64_t Address,
131 const MCDisassembler *Decoder);
132 static DecodeStatus DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo,
133 uint64_t Address,
134 const MCDisassembler *Decoder);
135 static DecodeStatus DecodeSysRegsRegisterClass(MCInst &Inst, unsigned RegNo,
136 uint64_t Address,
137 const MCDisassembler *Decoder);
138 static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo,
139 uint64_t Address,
140 const MCDisassembler *Decoder);
141 static DecodeStatus DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
142 uint64_t Address,
143 const MCDisassembler *Decoder);
144 static DecodeStatus
145 DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
146 const MCDisassembler *Decoder);
147 static DecodeStatus DecodeSysRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
148 uint64_t Address,
149 const MCDisassembler *Decoder);
150
151 static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp,
152 uint64_t Address,
153 const MCDisassembler *Decoder);
154 static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp,
155 uint64_t /*Address*/,
156 const MCDisassembler *Decoder);
157 static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
158 const MCDisassembler *Decoder);
159 #include "HexagonDepDecoders.inc"
160 #include "HexagonGenDisassemblerTables.inc"
161
createHexagonDisassembler(const Target & T,const MCSubtargetInfo & STI,MCContext & Ctx)162 static MCDisassembler *createHexagonDisassembler(const Target &T,
163 const MCSubtargetInfo &STI,
164 MCContext &Ctx) {
165 return new HexagonDisassembler(STI, Ctx, T.createMCInstrInfo());
166 }
167
LLVMInitializeHexagonDisassembler()168 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeHexagonDisassembler() {
169 TargetRegistry::RegisterMCDisassembler(getTheHexagonTarget(),
170 createHexagonDisassembler);
171 }
172
getInstruction(MCInst & MI,uint64_t & Size,ArrayRef<uint8_t> Bytes,uint64_t Address,raw_ostream & cs) const173 DecodeStatus HexagonDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
174 ArrayRef<uint8_t> Bytes,
175 uint64_t Address,
176 raw_ostream &cs) const {
177 DecodeStatus Result = DecodeStatus::Success;
178 bool Complete = false;
179 Size = 0;
180
181 *CurrentBundle = &MI;
182 MI.setOpcode(Hexagon::BUNDLE);
183 MI.addOperand(MCOperand::createImm(0));
184 while (Result == Success && !Complete) {
185 if (Bytes.size() < HEXAGON_INSTR_SIZE)
186 return MCDisassembler::Fail;
187 MCInst *Inst = getContext().createMCInst();
188 Result = getSingleInstruction(*Inst, MI, Bytes, Address, cs, Complete);
189 MI.addOperand(MCOperand::createInst(Inst));
190 Size += HEXAGON_INSTR_SIZE;
191 Bytes = Bytes.slice(HEXAGON_INSTR_SIZE);
192 }
193 if (Result == MCDisassembler::Fail)
194 return Result;
195 if (Size > HEXAGON_MAX_PACKET_SIZE)
196 return MCDisassembler::Fail;
197
198 const auto ArchSTI = Hexagon_MC::getArchSubtarget(&STI);
199 const auto STI_ = (ArchSTI != nullptr) ? *ArchSTI : STI;
200 HexagonMCChecker Checker(getContext(), *MCII, STI_, MI,
201 *getContext().getRegisterInfo(), false);
202 if (!Checker.check())
203 return MCDisassembler::Fail;
204 remapInstruction(MI);
205 return MCDisassembler::Success;
206 }
207
remapInstruction(MCInst & Instr) const208 void HexagonDisassembler::remapInstruction(MCInst &Instr) const {
209 for (auto I: HexagonMCInstrInfo::bundleInstructions(Instr)) {
210 auto &MI = const_cast<MCInst &>(*I.getInst());
211 switch (MI.getOpcode()) {
212 case Hexagon::S2_allocframe:
213 if (MI.getOperand(0).getReg() == Hexagon::R29) {
214 MI.setOpcode(Hexagon::S6_allocframe_to_raw);
215 MI.erase(MI.begin () + 1);
216 MI.erase(MI.begin ());
217 }
218 break;
219 case Hexagon::L2_deallocframe:
220 if (MI.getOperand(0).getReg() == Hexagon::D15 &&
221 MI.getOperand(1).getReg() == Hexagon::R30) {
222 MI.setOpcode(L6_deallocframe_map_to_raw);
223 MI.erase(MI.begin () + 1);
224 MI.erase(MI.begin ());
225 }
226 break;
227 case Hexagon::L4_return:
228 if (MI.getOperand(0).getReg() == Hexagon::D15 &&
229 MI.getOperand(1).getReg() == Hexagon::R30) {
230 MI.setOpcode(L6_return_map_to_raw);
231 MI.erase(MI.begin () + 1);
232 MI.erase(MI.begin ());
233 }
234 break;
235 case Hexagon::L4_return_t:
236 if (MI.getOperand(0).getReg() == Hexagon::D15 &&
237 MI.getOperand(2).getReg() == Hexagon::R30) {
238 MI.setOpcode(L4_return_map_to_raw_t);
239 MI.erase(MI.begin () + 2);
240 MI.erase(MI.begin ());
241 }
242 break;
243 case Hexagon::L4_return_f:
244 if (MI.getOperand(0).getReg() == Hexagon::D15 &&
245 MI.getOperand(2).getReg() == Hexagon::R30) {
246 MI.setOpcode(L4_return_map_to_raw_f);
247 MI.erase(MI.begin () + 2);
248 MI.erase(MI.begin ());
249 }
250 break;
251 case Hexagon::L4_return_tnew_pt:
252 if (MI.getOperand(0).getReg() == Hexagon::D15 &&
253 MI.getOperand(2).getReg() == Hexagon::R30) {
254 MI.setOpcode(L4_return_map_to_raw_tnew_pt);
255 MI.erase(MI.begin () + 2);
256 MI.erase(MI.begin ());
257 }
258 break;
259 case Hexagon::L4_return_fnew_pt:
260 if (MI.getOperand(0).getReg() == Hexagon::D15 &&
261 MI.getOperand(2).getReg() == Hexagon::R30) {
262 MI.setOpcode(L4_return_map_to_raw_fnew_pt);
263 MI.erase(MI.begin () + 2);
264 MI.erase(MI.begin ());
265 }
266 break;
267 case Hexagon::L4_return_tnew_pnt:
268 if (MI.getOperand(0).getReg() == Hexagon::D15 &&
269 MI.getOperand(2).getReg() == Hexagon::R30) {
270 MI.setOpcode(L4_return_map_to_raw_tnew_pnt);
271 MI.erase(MI.begin () + 2);
272 MI.erase(MI.begin ());
273 }
274 break;
275 case Hexagon::L4_return_fnew_pnt:
276 if (MI.getOperand(0).getReg() == Hexagon::D15 &&
277 MI.getOperand(2).getReg() == Hexagon::R30) {
278 MI.setOpcode(L4_return_map_to_raw_fnew_pnt);
279 MI.erase(MI.begin () + 2);
280 MI.erase(MI.begin ());
281 }
282 break;
283 }
284 }
285 }
286
adjustDuplex(MCInst & MI,MCContext & Context)287 static void adjustDuplex(MCInst &MI, MCContext &Context) {
288 switch (MI.getOpcode()) {
289 case Hexagon::SA1_setin1:
290 MI.insert(MI.begin() + 1,
291 MCOperand::createExpr(MCConstantExpr::create(-1, Context)));
292 break;
293 case Hexagon::SA1_dec:
294 MI.insert(MI.begin() + 2,
295 MCOperand::createExpr(MCConstantExpr::create(-1, Context)));
296 break;
297 default:
298 break;
299 }
300 }
301
getSingleInstruction(MCInst & MI,MCInst & MCB,ArrayRef<uint8_t> Bytes,uint64_t Address,raw_ostream & cs,bool & Complete) const302 DecodeStatus HexagonDisassembler::getSingleInstruction(MCInst &MI, MCInst &MCB,
303 ArrayRef<uint8_t> Bytes,
304 uint64_t Address,
305 raw_ostream &cs,
306 bool &Complete) const {
307 assert(Bytes.size() >= HEXAGON_INSTR_SIZE);
308
309 uint32_t Instruction = support::endian::read32le(Bytes.data());
310
311 auto BundleSize = HexagonMCInstrInfo::bundleSize(MCB);
312 if ((Instruction & HexagonII::INST_PARSE_MASK) ==
313 HexagonII::INST_PARSE_LOOP_END) {
314 if (BundleSize == 0)
315 HexagonMCInstrInfo::setInnerLoop(MCB);
316 else if (BundleSize == 1)
317 HexagonMCInstrInfo::setOuterLoop(MCB);
318 else
319 return DecodeStatus::Fail;
320 }
321
322 CurrentExtender = HexagonMCInstrInfo::extenderForIndex(
323 MCB, HexagonMCInstrInfo::bundleSize(MCB));
324
325 DecodeStatus Result = DecodeStatus::Fail;
326 if ((Instruction & HexagonII::INST_PARSE_MASK) ==
327 HexagonII::INST_PARSE_DUPLEX) {
328 unsigned duplexIClass;
329 uint8_t const *DecodeLow, *DecodeHigh;
330 duplexIClass = ((Instruction >> 28) & 0xe) | ((Instruction >> 13) & 0x1);
331 switch (duplexIClass) {
332 default:
333 return MCDisassembler::Fail;
334 case 0:
335 DecodeLow = DecoderTableSUBINSN_L132;
336 DecodeHigh = DecoderTableSUBINSN_L132;
337 break;
338 case 1:
339 DecodeLow = DecoderTableSUBINSN_L232;
340 DecodeHigh = DecoderTableSUBINSN_L132;
341 break;
342 case 2:
343 DecodeLow = DecoderTableSUBINSN_L232;
344 DecodeHigh = DecoderTableSUBINSN_L232;
345 break;
346 case 3:
347 DecodeLow = DecoderTableSUBINSN_A32;
348 DecodeHigh = DecoderTableSUBINSN_A32;
349 break;
350 case 4:
351 DecodeLow = DecoderTableSUBINSN_L132;
352 DecodeHigh = DecoderTableSUBINSN_A32;
353 break;
354 case 5:
355 DecodeLow = DecoderTableSUBINSN_L232;
356 DecodeHigh = DecoderTableSUBINSN_A32;
357 break;
358 case 6:
359 DecodeLow = DecoderTableSUBINSN_S132;
360 DecodeHigh = DecoderTableSUBINSN_A32;
361 break;
362 case 7:
363 DecodeLow = DecoderTableSUBINSN_S232;
364 DecodeHigh = DecoderTableSUBINSN_A32;
365 break;
366 case 8:
367 DecodeLow = DecoderTableSUBINSN_S132;
368 DecodeHigh = DecoderTableSUBINSN_L132;
369 break;
370 case 9:
371 DecodeLow = DecoderTableSUBINSN_S132;
372 DecodeHigh = DecoderTableSUBINSN_L232;
373 break;
374 case 10:
375 DecodeLow = DecoderTableSUBINSN_S132;
376 DecodeHigh = DecoderTableSUBINSN_S132;
377 break;
378 case 11:
379 DecodeLow = DecoderTableSUBINSN_S232;
380 DecodeHigh = DecoderTableSUBINSN_S132;
381 break;
382 case 12:
383 DecodeLow = DecoderTableSUBINSN_S232;
384 DecodeHigh = DecoderTableSUBINSN_L132;
385 break;
386 case 13:
387 DecodeLow = DecoderTableSUBINSN_S232;
388 DecodeHigh = DecoderTableSUBINSN_L232;
389 break;
390 case 14:
391 DecodeLow = DecoderTableSUBINSN_S232;
392 DecodeHigh = DecoderTableSUBINSN_S232;
393 break;
394 }
395 MI.setOpcode(Hexagon::DuplexIClass0 + duplexIClass);
396 MCInst *MILow = getContext().createMCInst();
397 MCInst *MIHigh = getContext().createMCInst();
398 auto TmpExtender = CurrentExtender;
399 CurrentExtender =
400 nullptr; // constant extenders in duplex must always be in slot 1
401 Result = decodeInstruction(DecodeLow, *MILow, Instruction & 0x1fff, Address,
402 this, STI);
403 CurrentExtender = TmpExtender;
404 if (Result != DecodeStatus::Success)
405 return DecodeStatus::Fail;
406 adjustDuplex(*MILow, getContext());
407 Result = decodeInstruction(
408 DecodeHigh, *MIHigh, (Instruction >> 16) & 0x1fff, Address, this, STI);
409 if (Result != DecodeStatus::Success)
410 return DecodeStatus::Fail;
411 adjustDuplex(*MIHigh, getContext());
412 MCOperand OPLow = MCOperand::createInst(MILow);
413 MCOperand OPHigh = MCOperand::createInst(MIHigh);
414 MI.addOperand(OPLow);
415 MI.addOperand(OPHigh);
416 Complete = true;
417 } else {
418 if ((Instruction & HexagonII::INST_PARSE_MASK) ==
419 HexagonII::INST_PARSE_PACKET_END)
420 Complete = true;
421
422 if (CurrentExtender != nullptr)
423 Result = decodeInstruction(DecoderTableMustExtend32, MI, Instruction,
424 Address, this, STI);
425
426 if (Result != MCDisassembler::Success)
427 Result = decodeInstruction(DecoderTable32, MI, Instruction, Address, this,
428 STI);
429
430 if (Result != MCDisassembler::Success &&
431 STI.hasFeature(Hexagon::ExtensionHVX))
432 Result = decodeInstruction(DecoderTableEXT_mmvec32, MI, Instruction,
433 Address, this, STI);
434
435 }
436
437 switch (MI.getOpcode()) {
438 case Hexagon::J4_cmpeqn1_f_jumpnv_nt:
439 case Hexagon::J4_cmpeqn1_f_jumpnv_t:
440 case Hexagon::J4_cmpeqn1_fp0_jump_nt:
441 case Hexagon::J4_cmpeqn1_fp0_jump_t:
442 case Hexagon::J4_cmpeqn1_fp1_jump_nt:
443 case Hexagon::J4_cmpeqn1_fp1_jump_t:
444 case Hexagon::J4_cmpeqn1_t_jumpnv_nt:
445 case Hexagon::J4_cmpeqn1_t_jumpnv_t:
446 case Hexagon::J4_cmpeqn1_tp0_jump_nt:
447 case Hexagon::J4_cmpeqn1_tp0_jump_t:
448 case Hexagon::J4_cmpeqn1_tp1_jump_nt:
449 case Hexagon::J4_cmpeqn1_tp1_jump_t:
450 case Hexagon::J4_cmpgtn1_f_jumpnv_nt:
451 case Hexagon::J4_cmpgtn1_f_jumpnv_t:
452 case Hexagon::J4_cmpgtn1_fp0_jump_nt:
453 case Hexagon::J4_cmpgtn1_fp0_jump_t:
454 case Hexagon::J4_cmpgtn1_fp1_jump_nt:
455 case Hexagon::J4_cmpgtn1_fp1_jump_t:
456 case Hexagon::J4_cmpgtn1_t_jumpnv_nt:
457 case Hexagon::J4_cmpgtn1_t_jumpnv_t:
458 case Hexagon::J4_cmpgtn1_tp0_jump_nt:
459 case Hexagon::J4_cmpgtn1_tp0_jump_t:
460 case Hexagon::J4_cmpgtn1_tp1_jump_nt:
461 case Hexagon::J4_cmpgtn1_tp1_jump_t:
462 MI.insert(MI.begin() + 1,
463 MCOperand::createExpr(MCConstantExpr::create(-1, getContext())));
464 break;
465 default:
466 break;
467 }
468
469 if (HexagonMCInstrInfo::isNewValue(*MCII, MI)) {
470 unsigned OpIndex = HexagonMCInstrInfo::getNewValueOp(*MCII, MI);
471 MCOperand &MCO = MI.getOperand(OpIndex);
472 assert(MCO.isReg() && "New value consumers must be registers");
473 unsigned Register =
474 getContext().getRegisterInfo()->getEncodingValue(MCO.getReg());
475 if ((Register & 0x6) == 0)
476 // HexagonPRM 10.11 Bit 1-2 == 0 is reserved
477 return MCDisassembler::Fail;
478 unsigned Lookback = (Register & 0x6) >> 1;
479 unsigned Offset = 1;
480 bool Vector = HexagonMCInstrInfo::isVector(*MCII, MI);
481 bool PrevVector = false;
482 auto Instructions = HexagonMCInstrInfo::bundleInstructions(**CurrentBundle);
483 auto i = Instructions.end() - 1;
484 for (auto n = Instructions.begin() - 1;; --i, ++Offset) {
485 if (i == n)
486 // Couldn't find producer
487 return MCDisassembler::Fail;
488 bool CurrentVector = HexagonMCInstrInfo::isVector(*MCII, *i->getInst());
489 if (Vector && !CurrentVector)
490 // Skip scalars when calculating distances for vectors
491 ++Lookback;
492 if (HexagonMCInstrInfo::isImmext(*i->getInst()) && (Vector == PrevVector))
493 ++Lookback;
494 PrevVector = CurrentVector;
495 if (Offset == Lookback)
496 break;
497 }
498 auto const &Inst = *i->getInst();
499 bool SubregBit = (Register & 0x1) != 0;
500 if (HexagonMCInstrInfo::hasNewValue2(*MCII, Inst)) {
501 // If subreg bit is set we're selecting the second produced newvalue
502 unsigned Producer = SubregBit ?
503 HexagonMCInstrInfo::getNewValueOperand(*MCII, Inst).getReg() :
504 HexagonMCInstrInfo::getNewValueOperand2(*MCII, Inst).getReg();
505 assert(Producer != Hexagon::NoRegister);
506 MCO.setReg(Producer);
507 } else if (HexagonMCInstrInfo::hasNewValue(*MCII, Inst)) {
508 unsigned Producer =
509 HexagonMCInstrInfo::getNewValueOperand(*MCII, Inst).getReg();
510
511 if (HexagonMCInstrInfo::IsVecRegPair(Producer)) {
512 const bool Rev = HexagonMCInstrInfo::IsReverseVecRegPair(Producer);
513 const unsigned ProdPairIndex =
514 Rev ? Producer - Hexagon::WR0 : Producer - Hexagon::W0;
515 if (Rev)
516 SubregBit = !SubregBit;
517 Producer = (ProdPairIndex << 1) + SubregBit + Hexagon::V0;
518 } else if (SubregBit)
519 // Hexagon PRM 10.11 New-value operands
520 // Nt[0] is reserved and should always be encoded as zero.
521 return MCDisassembler::Fail;
522 assert(Producer != Hexagon::NoRegister);
523 MCO.setReg(Producer);
524 } else
525 return MCDisassembler::Fail;
526 }
527
528 if (CurrentExtender != nullptr) {
529 MCInst const &Inst = HexagonMCInstrInfo::isDuplex(*MCII, MI)
530 ? *MI.getOperand(1).getInst()
531 : MI;
532 if (!HexagonMCInstrInfo::isExtendable(*MCII, Inst) &&
533 !HexagonMCInstrInfo::isExtended(*MCII, Inst))
534 return MCDisassembler::Fail;
535 }
536 return Result;
537 }
538
DecodeRegisterClass(MCInst & Inst,unsigned RegNo,ArrayRef<MCPhysReg> Table)539 static DecodeStatus DecodeRegisterClass(MCInst &Inst, unsigned RegNo,
540 ArrayRef<MCPhysReg> Table) {
541 if (RegNo < Table.size()) {
542 Inst.addOperand(MCOperand::createReg(Table[RegNo]));
543 return MCDisassembler::Success;
544 }
545
546 return MCDisassembler::Fail;
547 }
548
549 static DecodeStatus
DecodeIntRegsLow8RegisterClass(MCInst & Inst,unsigned RegNo,uint64_t Address,const MCDisassembler * Decoder)550 DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address,
551 const MCDisassembler *Decoder) {
552 return DecodeIntRegsRegisterClass(Inst, RegNo, Address, Decoder);
553 }
554
DecodeIntRegsRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t Address,const MCDisassembler * Decoder)555 static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo,
556 uint64_t Address,
557 const MCDisassembler *Decoder) {
558 static const MCPhysReg IntRegDecoderTable[] = {
559 Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3, Hexagon::R4,
560 Hexagon::R5, Hexagon::R6, Hexagon::R7, Hexagon::R8, Hexagon::R9,
561 Hexagon::R10, Hexagon::R11, Hexagon::R12, Hexagon::R13, Hexagon::R14,
562 Hexagon::R15, Hexagon::R16, Hexagon::R17, Hexagon::R18, Hexagon::R19,
563 Hexagon::R20, Hexagon::R21, Hexagon::R22, Hexagon::R23, Hexagon::R24,
564 Hexagon::R25, Hexagon::R26, Hexagon::R27, Hexagon::R28, Hexagon::R29,
565 Hexagon::R30, Hexagon::R31};
566
567 return DecodeRegisterClass(Inst, RegNo, IntRegDecoderTable);
568 }
569
570 static DecodeStatus
DecodeGeneralSubRegsRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t Address,const MCDisassembler * Decoder)571 DecodeGeneralSubRegsRegisterClass(MCInst &Inst, unsigned RegNo,
572 uint64_t Address,
573 const MCDisassembler *Decoder) {
574 static const MCPhysReg GeneralSubRegDecoderTable[] = {
575 Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3,
576 Hexagon::R4, Hexagon::R5, Hexagon::R6, Hexagon::R7,
577 Hexagon::R16, Hexagon::R17, Hexagon::R18, Hexagon::R19,
578 Hexagon::R20, Hexagon::R21, Hexagon::R22, Hexagon::R23,
579 };
580
581 return DecodeRegisterClass(Inst, RegNo, GeneralSubRegDecoderTable);
582 }
583
DecodeHvxVRRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)584 static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo,
585 uint64_t /*Address*/,
586 const MCDisassembler *Decoder) {
587 static const MCPhysReg HvxVRDecoderTable[] = {
588 Hexagon::V0, Hexagon::V1, Hexagon::V2, Hexagon::V3, Hexagon::V4,
589 Hexagon::V5, Hexagon::V6, Hexagon::V7, Hexagon::V8, Hexagon::V9,
590 Hexagon::V10, Hexagon::V11, Hexagon::V12, Hexagon::V13, Hexagon::V14,
591 Hexagon::V15, Hexagon::V16, Hexagon::V17, Hexagon::V18, Hexagon::V19,
592 Hexagon::V20, Hexagon::V21, Hexagon::V22, Hexagon::V23, Hexagon::V24,
593 Hexagon::V25, Hexagon::V26, Hexagon::V27, Hexagon::V28, Hexagon::V29,
594 Hexagon::V30, Hexagon::V31};
595
596 return DecodeRegisterClass(Inst, RegNo, HvxVRDecoderTable);
597 }
598
599 static DecodeStatus
DecodeDoubleRegsRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)600 DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo,
601 uint64_t /*Address*/,
602 const MCDisassembler *Decoder) {
603 static const MCPhysReg DoubleRegDecoderTable[] = {
604 Hexagon::D0, Hexagon::D1, Hexagon::D2, Hexagon::D3,
605 Hexagon::D4, Hexagon::D5, Hexagon::D6, Hexagon::D7,
606 Hexagon::D8, Hexagon::D9, Hexagon::D10, Hexagon::D11,
607 Hexagon::D12, Hexagon::D13, Hexagon::D14, Hexagon::D15};
608
609 return DecodeRegisterClass(Inst, RegNo >> 1, DoubleRegDecoderTable);
610 }
611
612 static DecodeStatus
DecodeGeneralDoubleLow8RegsRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)613 DecodeGeneralDoubleLow8RegsRegisterClass(MCInst &Inst, unsigned RegNo,
614 uint64_t /*Address*/,
615 const MCDisassembler *Decoder) {
616 static const MCPhysReg GeneralDoubleLow8RegDecoderTable[] = {
617 Hexagon::D0, Hexagon::D1, Hexagon::D2, Hexagon::D3,
618 Hexagon::D8, Hexagon::D9, Hexagon::D10, Hexagon::D11};
619
620 return DecodeRegisterClass(Inst, RegNo, GeneralDoubleLow8RegDecoderTable);
621 }
622
DecodeHvxWRRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)623 static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo,
624 uint64_t /*Address*/,
625 const MCDisassembler *Decoder) {
626 static const MCPhysReg HvxWRDecoderTable[] = {
627 Hexagon::W0, Hexagon::WR0, Hexagon::W1, Hexagon::WR1, Hexagon::W2,
628 Hexagon::WR2, Hexagon::W3, Hexagon::WR3, Hexagon::W4, Hexagon::WR4,
629 Hexagon::W5, Hexagon::WR5, Hexagon::W6, Hexagon::WR6, Hexagon::W7,
630 Hexagon::WR7, Hexagon::W8, Hexagon::WR8, Hexagon::W9, Hexagon::WR9,
631 Hexagon::W10, Hexagon::WR10, Hexagon::W11, Hexagon::WR11, Hexagon::W12,
632 Hexagon::WR12, Hexagon::W13, Hexagon::WR13, Hexagon::W14, Hexagon::WR14,
633 Hexagon::W15, Hexagon::WR15,
634 };
635
636 return DecodeRegisterClass(Inst, RegNo, HvxWRDecoderTable);
637 }
638
639 LLVM_ATTRIBUTE_UNUSED // Suppress warning temporarily.
640 static DecodeStatus
DecodeHvxVQRRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)641 DecodeHvxVQRRegisterClass(MCInst &Inst, unsigned RegNo,
642 uint64_t /*Address*/,
643 const MCDisassembler *Decoder) {
644 static const MCPhysReg HvxVQRDecoderTable[] = {
645 Hexagon::VQ0, Hexagon::VQ1, Hexagon::VQ2, Hexagon::VQ3,
646 Hexagon::VQ4, Hexagon::VQ5, Hexagon::VQ6, Hexagon::VQ7};
647
648 return DecodeRegisterClass(Inst, RegNo >> 2, HvxVQRDecoderTable);
649 }
650
DecodePredRegsRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)651 static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
652 uint64_t /*Address*/,
653 const MCDisassembler *Decoder) {
654 static const MCPhysReg PredRegDecoderTable[] = {Hexagon::P0, Hexagon::P1,
655 Hexagon::P2, Hexagon::P3};
656
657 return DecodeRegisterClass(Inst, RegNo, PredRegDecoderTable);
658 }
659
DecodeHvxQRRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)660 static DecodeStatus DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo,
661 uint64_t /*Address*/,
662 const MCDisassembler *Decoder) {
663 static const MCPhysReg HvxQRDecoderTable[] = {Hexagon::Q0, Hexagon::Q1,
664 Hexagon::Q2, Hexagon::Q3};
665
666 return DecodeRegisterClass(Inst, RegNo, HvxQRDecoderTable);
667 }
668
DecodeCtrRegsRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)669 static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo,
670 uint64_t /*Address*/,
671 const MCDisassembler *Decoder) {
672 using namespace Hexagon;
673
674 static const MCPhysReg CtrlRegDecoderTable[] = {
675 /* 0 */ SA0, LC0, SA1, LC1,
676 /* 4 */ P3_0, C5, M0, M1,
677 /* 8 */ USR, PC, UGP, GP,
678 /* 12 */ CS0, CS1, UPCYCLELO, UPCYCLEHI,
679 /* 16 */ FRAMELIMIT, FRAMEKEY, PKTCOUNTLO, PKTCOUNTHI,
680 /* 20 */ 0, 0, 0, 0,
681 /* 24 */ 0, 0, 0, 0,
682 /* 28 */ 0, 0, UTIMERLO, UTIMERHI
683 };
684
685 if (RegNo >= std::size(CtrlRegDecoderTable))
686 return MCDisassembler::Fail;
687
688 static_assert(NoRegister == 0, "Expecting NoRegister to be 0");
689 if (CtrlRegDecoderTable[RegNo] == NoRegister)
690 return MCDisassembler::Fail;
691
692 unsigned Register = CtrlRegDecoderTable[RegNo];
693 Inst.addOperand(MCOperand::createReg(Register));
694 return MCDisassembler::Success;
695 }
696
697 static DecodeStatus
DecodeCtrRegs64RegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)698 DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t /*Address*/,
699 const MCDisassembler *Decoder) {
700 using namespace Hexagon;
701
702 static const MCPhysReg CtrlReg64DecoderTable[] = {
703 /* 0 */ C1_0, 0, C3_2, 0,
704 /* 4 */ C5_4, 0, C7_6, 0,
705 /* 8 */ C9_8, 0, C11_10, 0,
706 /* 12 */ CS, 0, UPCYCLE, 0,
707 /* 16 */ C17_16, 0, PKTCOUNT, 0,
708 /* 20 */ 0, 0, 0, 0,
709 /* 24 */ 0, 0, 0, 0,
710 /* 28 */ 0, 0, UTIMER, 0
711 };
712
713 if (RegNo >= std::size(CtrlReg64DecoderTable))
714 return MCDisassembler::Fail;
715
716 static_assert(NoRegister == 0, "Expecting NoRegister to be 0");
717 if (CtrlReg64DecoderTable[RegNo] == NoRegister)
718 return MCDisassembler::Fail;
719
720 unsigned Register = CtrlReg64DecoderTable[RegNo];
721 Inst.addOperand(MCOperand::createReg(Register));
722 return MCDisassembler::Success;
723 }
724
DecodeModRegsRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)725 static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo,
726 uint64_t /*Address*/,
727 const MCDisassembler *Decoder) {
728 unsigned Register = 0;
729 switch (RegNo) {
730 case 0:
731 Register = Hexagon::M0;
732 break;
733 case 1:
734 Register = Hexagon::M1;
735 break;
736 default:
737 return MCDisassembler::Fail;
738 }
739 Inst.addOperand(MCOperand::createReg(Register));
740 return MCDisassembler::Success;
741 }
742
unsignedImmDecoder(MCInst & MI,unsigned tmp,uint64_t,const MCDisassembler * Decoder)743 static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp,
744 uint64_t /*Address*/,
745 const MCDisassembler *Decoder) {
746 HexagonDisassembler const &Disassembler = disassembler(Decoder);
747 int64_t FullValue = fullValue(Disassembler, MI, tmp);
748 assert(FullValue >= 0 && "Negative in unsigned decoder");
749 HexagonMCInstrInfo::addConstant(MI, FullValue, Disassembler.getContext());
750 return MCDisassembler::Success;
751 }
752
s32_0ImmDecoder(MCInst & MI,unsigned tmp,uint64_t,const MCDisassembler * Decoder)753 static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp,
754 uint64_t /*Address*/,
755 const MCDisassembler *Decoder) {
756 HexagonDisassembler const &Disassembler = disassembler(Decoder);
757 unsigned Bits = HexagonMCInstrInfo::getExtentBits(*Disassembler.MCII, MI);
758 tmp = SignExtend64(tmp, Bits);
759 signedDecoder<32>(MI, tmp, Decoder);
760 return MCDisassembler::Success;
761 }
762
763 // custom decoder for various jump/call immediates
brtargetDecoder(MCInst & MI,unsigned tmp,uint64_t Address,const MCDisassembler * Decoder)764 static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
765 const MCDisassembler *Decoder) {
766 HexagonDisassembler const &Disassembler = disassembler(Decoder);
767 unsigned Bits = HexagonMCInstrInfo::getExtentBits(*Disassembler.MCII, MI);
768 // r13_2 is not extendable, so if there are no extent bits, it's r13_2
769 if (Bits == 0)
770 Bits = 15;
771 uint64_t FullValue = fullValue(Disassembler, MI, SignExtend64(tmp, Bits));
772 uint32_t Extended = FullValue + Address;
773 if (!Disassembler.tryAddingSymbolicOperand(MI, Extended, Address, true, 0, 0,
774 4))
775 HexagonMCInstrInfo::addConstant(MI, Extended, Disassembler.getContext());
776 return MCDisassembler::Success;
777 }
778
779 static const uint16_t SysRegDecoderTable[] = {
780 Hexagon::SGP0, Hexagon::SGP1, Hexagon::STID,
781 Hexagon::ELR, Hexagon::BADVA0, Hexagon::BADVA1,
782 Hexagon::SSR, Hexagon::CCR, Hexagon::HTID,
783 Hexagon::BADVA, Hexagon::IMASK, Hexagon::S11,
784 Hexagon::S12, Hexagon::S13, Hexagon::S14,
785 Hexagon::S15, Hexagon::EVB, Hexagon::MODECTL,
786 Hexagon::SYSCFG, Hexagon::S19, Hexagon::S20,
787 Hexagon::VID, Hexagon::S22, Hexagon::S23,
788 Hexagon::S24, Hexagon::S25, Hexagon::S26,
789 Hexagon::CFGBASE, Hexagon::DIAG, Hexagon::REV,
790 Hexagon::PCYCLELO, Hexagon::PCYCLEHI, Hexagon::ISDBST,
791 Hexagon::ISDBCFG0, Hexagon::ISDBCFG1, Hexagon::S35,
792 Hexagon::BRKPTPC0, Hexagon::BRKPTCFG0, Hexagon::BRKPTPC1,
793 Hexagon::BRKPTCFG1, Hexagon::ISDBMBXIN, Hexagon::ISDBMBXOUT,
794 Hexagon::ISDBEN, Hexagon::ISDBGPR, Hexagon::S44,
795 Hexagon::S45, Hexagon::S46, Hexagon::S47,
796 Hexagon::PMUCNT0, Hexagon::PMUCNT1, Hexagon::PMUCNT2,
797 Hexagon::PMUCNT3, Hexagon::PMUEVTCFG, Hexagon::PMUCFG,
798 Hexagon::S54, Hexagon::S55, Hexagon::S56,
799 Hexagon::S57, Hexagon::S58, Hexagon::S59,
800 Hexagon::S60, Hexagon::S61, Hexagon::S62,
801 Hexagon::S63, Hexagon::S64, Hexagon::S65,
802 Hexagon::S66, Hexagon::S67, Hexagon::S68,
803 Hexagon::S69, Hexagon::S70, Hexagon::S71,
804 Hexagon::S72, Hexagon::S73, Hexagon::S74,
805 Hexagon::S75, Hexagon::S76, Hexagon::S77,
806 Hexagon::S78, Hexagon::S79, Hexagon::S80,
807 };
808
DecodeSysRegsRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)809 static DecodeStatus DecodeSysRegsRegisterClass(MCInst &Inst, unsigned RegNo,
810 uint64_t /*Address*/,
811 const MCDisassembler *Decoder) {
812 if (RegNo >= std::size(SysRegDecoderTable))
813 return MCDisassembler::Fail;
814
815 if (SysRegDecoderTable[RegNo] == Hexagon::NoRegister)
816 return MCDisassembler::Fail;
817
818 unsigned Register = SysRegDecoderTable[RegNo];
819 Inst.addOperand(MCOperand::createReg(Register));
820 return MCDisassembler::Success;
821 }
822
823 static const uint16_t SysReg64DecoderTable[] = {
824 Hexagon::SGP1_0, Hexagon::S3_2, Hexagon::S5_4, Hexagon::S7_6,
825 Hexagon::S9_8, Hexagon::S11_10, Hexagon::S13_12, Hexagon::S15_14,
826 Hexagon::S17_16, Hexagon::S19_18, Hexagon::S21_20, Hexagon::S23_22,
827 Hexagon::S25_24, Hexagon::S27_26, Hexagon::S29_28, Hexagon::S31_30,
828 Hexagon::S33_32, Hexagon::S35_34, Hexagon::S37_36, Hexagon::S39_38,
829 Hexagon::S41_40, Hexagon::S43_42, Hexagon::S45_44, Hexagon::S47_46,
830 Hexagon::S49_48, Hexagon::S51_50, Hexagon::S53_52, Hexagon::S55_54,
831 Hexagon::S57_56, Hexagon::S59_58, Hexagon::S61_60, Hexagon::S63_62,
832 Hexagon::S65_64, Hexagon::S67_66, Hexagon::S69_68, Hexagon::S71_70,
833 Hexagon::S73_72, Hexagon::S75_74, Hexagon::S77_76, Hexagon::S79_78,
834 };
835
836 static DecodeStatus
DecodeSysRegs64RegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)837 DecodeSysRegs64RegisterClass(MCInst &Inst, unsigned RegNo, uint64_t /*Address*/,
838 const MCDisassembler *Decoder) {
839 RegNo = RegNo >> 1;
840 if (RegNo >= std::size(SysReg64DecoderTable))
841 return MCDisassembler::Fail;
842
843 if (SysReg64DecoderTable[RegNo] == Hexagon::NoRegister)
844 return MCDisassembler::Fail;
845
846 unsigned Register = SysReg64DecoderTable[RegNo];
847 Inst.addOperand(MCOperand::createReg(Register));
848 return MCDisassembler::Success;
849 }
850
851 static DecodeStatus
DecodeGuestRegsRegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)852 DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t /*Address*/,
853 const MCDisassembler *Decoder) {
854 using namespace Hexagon;
855
856 static const MCPhysReg GuestRegDecoderTable[] = {
857 /* 0 */ GELR, GSR, GOSP, G3,
858 /* 4 */ G4, G5, G6, G7,
859 /* 8 */ G8, G9, G10, G11,
860 /* 12 */ G12, G13, G14, G15,
861 /* 16 */ GPMUCNT4, GPMUCNT5, GPMUCNT6, GPMUCNT7,
862 /* 20 */ G20, G21, G22, G23,
863 /* 24 */ GPCYCLELO, GPCYCLEHI, GPMUCNT0, GPMUCNT1,
864 /* 28 */ GPMUCNT2, GPMUCNT3, G30, G31
865 };
866
867 if (RegNo >= std::size(GuestRegDecoderTable))
868 return MCDisassembler::Fail;
869 if (GuestRegDecoderTable[RegNo] == Hexagon::NoRegister)
870 return MCDisassembler::Fail;
871
872 unsigned Register = GuestRegDecoderTable[RegNo];
873 Inst.addOperand(MCOperand::createReg(Register));
874 return MCDisassembler::Success;
875 }
876
877 static DecodeStatus
DecodeGuestRegs64RegisterClass(MCInst & Inst,unsigned RegNo,uint64_t,const MCDisassembler * Decoder)878 DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
879 uint64_t /*Address*/,
880 const MCDisassembler *Decoder) {
881 using namespace Hexagon;
882
883 static const MCPhysReg GuestReg64DecoderTable[] = {
884 /* 0 */ G1_0, 0, G3_2, 0,
885 /* 4 */ G5_4, 0, G7_6, 0,
886 /* 8 */ G9_8, 0, G11_10, 0,
887 /* 12 */ G13_12, 0, G15_14, 0,
888 /* 16 */ G17_16, 0, G19_18, 0,
889 /* 20 */ G21_20, 0, G23_22, 0,
890 /* 24 */ G25_24, 0, G27_26, 0,
891 /* 28 */ G29_28, 0, G31_30, 0
892 };
893
894 if (RegNo >= std::size(GuestReg64DecoderTable))
895 return MCDisassembler::Fail;
896 if (GuestReg64DecoderTable[RegNo] == Hexagon::NoRegister)
897 return MCDisassembler::Fail;
898
899 unsigned Register = GuestReg64DecoderTable[RegNo];
900 Inst.addOperand(MCOperand::createReg(Register));
901 return MCDisassembler::Success;
902 }
903