LLVM 17.0.0git
XCoreDisassembler.cpp
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1//===- XCoreDisassembler.cpp - Disassembler for XCore -----------*- 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/// \file
10/// This file is part of the XCore Disassembler.
11///
12//===----------------------------------------------------------------------===//
13
14#include "TargetInfo/XCoreTargetInfo.h"
15#include "XCore.h"
16#include "XCoreRegisterInfo.h"
17#include "llvm/MC/MCContext.h"
18#include "llvm/MC/MCDecoderOps.h"
19#include "llvm/MC/MCDisassembler/MCDisassembler.h"
20#include "llvm/MC/MCInst.h"
21#include "llvm/MC/MCSubtargetInfo.h"
22#include "llvm/MC/TargetRegistry.h"
23
24using namespace llvm;
25
26#define DEBUG_TYPE "xcore-disassembler"
27
28typedef MCDisassembler::DecodeStatus DecodeStatus;
29
30namespace {
31
32/// A disassembler class for XCore.
33class XCoreDisassembler : public MCDisassembler {
34public:
35 XCoreDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) :
36 MCDisassembler(STI, Ctx) {}
37
38 DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
39 ArrayRef<uint8_t> Bytes, uint64_t Address,
40 raw_ostream &CStream) const override;
41};
42}
43
44static bool readInstruction16(ArrayRef<uint8_t> Bytes, uint64_t Address,
45 uint64_t &Size, uint16_t &Insn) {
46 // We want to read exactly 2 Bytes of data.
47 if (Bytes.size() < 2) {
48 Size = 0;
49 return false;
50 }
51 // Encoded as a little-endian 16-bit word in the stream.
52 Insn = (Bytes[0] << 0) | (Bytes[1] << 8);
53 return true;
54}
55
56static bool readInstruction32(ArrayRef<uint8_t> Bytes, uint64_t Address,
57 uint64_t &Size, uint32_t &Insn) {
58 // We want to read exactly 4 Bytes of data.
59 if (Bytes.size() < 4) {
60 Size = 0;
61 return false;
62 }
63 // Encoded as a little-endian 32-bit word in the stream.
64 Insn =
65 (Bytes[0] << 0) | (Bytes[1] << 8) | (Bytes[2] << 16) | (Bytes[3] << 24);
66 return true;
67}
68
69static unsigned getReg(const MCDisassembler *D, unsigned RC, unsigned RegNo) {
70 const MCRegisterInfo *RegInfo = D->getContext().getRegisterInfo();
71 return *(RegInfo->getRegClass(RC).begin() + RegNo);
72}
73
74static DecodeStatus DecodeGRRegsRegisterClass(MCInst &Inst, unsigned RegNo,
75 uint64_t Address,
76 const MCDisassembler *Decoder);
77
78static DecodeStatus DecodeRRegsRegisterClass(MCInst &Inst, unsigned RegNo,
79 uint64_t Address,
80 const MCDisassembler *Decoder);
81
82static DecodeStatus DecodeBitpOperand(MCInst &Inst, unsigned Val,
83 uint64_t Address,
84 const MCDisassembler *Decoder);
85
86static DecodeStatus DecodeNegImmOperand(MCInst &Inst, unsigned Val,
87 uint64_t Address,
88 const MCDisassembler *Decoder);
89
90static DecodeStatus Decode2RInstruction(MCInst &Inst, unsigned Insn,
91 uint64_t Address,
92 const MCDisassembler *Decoder);
93
94static DecodeStatus Decode2RImmInstruction(MCInst &Inst, unsigned Insn,
95 uint64_t Address,
96 const MCDisassembler *Decoder);
97
98static DecodeStatus DecodeR2RInstruction(MCInst &Inst, unsigned Insn,
99 uint64_t Address,
100 const MCDisassembler *Decoder);
101
102static DecodeStatus Decode2RSrcDstInstruction(MCInst &Inst, unsigned Insn,
103 uint64_t Address,
104 const MCDisassembler *Decoder);
105
106static DecodeStatus DecodeRUSInstruction(MCInst &Inst, unsigned Insn,
107 uint64_t Address,
108 const MCDisassembler *Decoder);
109
110static DecodeStatus DecodeRUSBitpInstruction(MCInst &Inst, unsigned Insn,
111 uint64_t Address,
112 const MCDisassembler *Decoder);
113
114static DecodeStatus
115DecodeRUSSrcDstBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
116 const MCDisassembler *Decoder);
117
118static DecodeStatus DecodeL2RInstruction(MCInst &Inst, unsigned Insn,
119 uint64_t Address,
120 const MCDisassembler *Decoder);
121
122static DecodeStatus DecodeLR2RInstruction(MCInst &Inst, unsigned Insn,
123 uint64_t Address,
124 const MCDisassembler *Decoder);
125
126static DecodeStatus Decode3RInstruction(MCInst &Inst, unsigned Insn,
127 uint64_t Address,
128 const MCDisassembler *Decoder);
129
130static DecodeStatus Decode3RImmInstruction(MCInst &Inst, unsigned Insn,
131 uint64_t Address,
132 const MCDisassembler *Decoder);
133
134static DecodeStatus Decode2RUSInstruction(MCInst &Inst, unsigned Insn,
135 uint64_t Address,
136 const MCDisassembler *Decoder);
137
138static DecodeStatus Decode2RUSBitpInstruction(MCInst &Inst, unsigned Insn,
139 uint64_t Address,
140 const MCDisassembler *Decoder);
141
142static DecodeStatus DecodeL3RInstruction(MCInst &Inst, unsigned Insn,
143 uint64_t Address,
144 const MCDisassembler *Decoder);
145
146static DecodeStatus DecodeL3RSrcDstInstruction(MCInst &Inst, unsigned Insn,
147 uint64_t Address,
148 const MCDisassembler *Decoder);
149
150static DecodeStatus DecodeL2RUSInstruction(MCInst &Inst, unsigned Insn,
151 uint64_t Address,
152 const MCDisassembler *Decoder);
153
154static DecodeStatus DecodeL2RUSBitpInstruction(MCInst &Inst, unsigned Insn,
155 uint64_t Address,
156 const MCDisassembler *Decoder);
157
158static DecodeStatus DecodeL6RInstruction(MCInst &Inst, unsigned Insn,
159 uint64_t Address,
160 const MCDisassembler *Decoder);
161
162static DecodeStatus DecodeL5RInstruction(MCInst &Inst, unsigned Insn,
163 uint64_t Address,
164 const MCDisassembler *Decoder);
165
166static DecodeStatus DecodeL4RSrcDstInstruction(MCInst &Inst, unsigned Insn,
167 uint64_t Address,
168 const MCDisassembler *Decoder);
169
170static DecodeStatus
171DecodeL4RSrcDstSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
172 const MCDisassembler *Decoder);
173
174#include "XCoreGenDisassemblerTables.inc"
175
176static DecodeStatus DecodeGRRegsRegisterClass(MCInst &Inst, unsigned RegNo,
177 uint64_t Address,
178 const MCDisassembler *Decoder) {
179 if (RegNo > 11)
180 return MCDisassembler::Fail;
181 unsigned Reg = getReg(Decoder, XCore::GRRegsRegClassID, RegNo);
182 Inst.addOperand(MCOperand::createReg(Reg));
183 return MCDisassembler::Success;
184}
185
186static DecodeStatus DecodeRRegsRegisterClass(MCInst &Inst, unsigned RegNo,
187 uint64_t Address,
188 const MCDisassembler *Decoder) {
189 if (RegNo > 15)
190 return MCDisassembler::Fail;
191 unsigned Reg = getReg(Decoder, XCore::RRegsRegClassID, RegNo);
192 Inst.addOperand(MCOperand::createReg(Reg));
193 return MCDisassembler::Success;
194}
195
196static DecodeStatus DecodeBitpOperand(MCInst &Inst, unsigned Val,
197 uint64_t Address,
198 const MCDisassembler *Decoder) {
199 if (Val > 11)
200 return MCDisassembler::Fail;
201 static const unsigned Values[] = {
202 32 /*bpw*/, 1, 2, 3, 4, 5, 6, 7, 8, 16, 24, 32
203 };
204 Inst.addOperand(MCOperand::createImm(Values[Val]));
205 return MCDisassembler::Success;
206}
207
208static DecodeStatus DecodeNegImmOperand(MCInst &Inst, unsigned Val,
209 uint64_t Address,
210 const MCDisassembler *Decoder) {
211 Inst.addOperand(MCOperand::createImm(-(int64_t)Val));
212 return MCDisassembler::Success;
213}
214
215static DecodeStatus
216Decode2OpInstruction(unsigned Insn, unsigned &Op1, unsigned &Op2) {
217 unsigned Combined = fieldFromInstruction(Insn, 6, 5);
218 if (Combined < 27)
219 return MCDisassembler::Fail;
220 if (fieldFromInstruction(Insn, 5, 1)) {
221 if (Combined == 31)
222 return MCDisassembler::Fail;
223 Combined += 5;
224 }
225 Combined -= 27;
226 unsigned Op1High = Combined % 3;
227 unsigned Op2High = Combined / 3;
228 Op1 = (Op1High << 2) | fieldFromInstruction(Insn, 2, 2);
229 Op2 = (Op2High << 2) | fieldFromInstruction(Insn, 0, 2);
230 return MCDisassembler::Success;
231}
232
233static DecodeStatus
234Decode3OpInstruction(unsigned Insn, unsigned &Op1, unsigned &Op2,
235 unsigned &Op3) {
236 unsigned Combined = fieldFromInstruction(Insn, 6, 5);
237 if (Combined >= 27)
238 return MCDisassembler::Fail;
239
240 unsigned Op1High = Combined % 3;
241 unsigned Op2High = (Combined / 3) % 3;
242 unsigned Op3High = Combined / 9;
243 Op1 = (Op1High << 2) | fieldFromInstruction(Insn, 4, 2);
244 Op2 = (Op2High << 2) | fieldFromInstruction(Insn, 2, 2);
245 Op3 = (Op3High << 2) | fieldFromInstruction(Insn, 0, 2);
246 return MCDisassembler::Success;
247}
248
249static DecodeStatus Decode2OpInstructionFail(MCInst &Inst, unsigned Insn,
250 uint64_t Address,
251 const MCDisassembler *Decoder) {
252 // Try and decode as a 3R instruction.
253 unsigned Opcode = fieldFromInstruction(Insn, 11, 5);
254 switch (Opcode) {
255 case 0x0:
256 Inst.setOpcode(XCore::STW_2rus);
257 return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
258 case 0x1:
259 Inst.setOpcode(XCore::LDW_2rus);
260 return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
261 case 0x2:
262 Inst.setOpcode(XCore::ADD_3r);
263 return Decode3RInstruction(Inst, Insn, Address, Decoder);
264 case 0x3:
265 Inst.setOpcode(XCore::SUB_3r);
266 return Decode3RInstruction(Inst, Insn, Address, Decoder);
267 case 0x4:
268 Inst.setOpcode(XCore::SHL_3r);
269 return Decode3RInstruction(Inst, Insn, Address, Decoder);
270 case 0x5:
271 Inst.setOpcode(XCore::SHR_3r);
272 return Decode3RInstruction(Inst, Insn, Address, Decoder);
273 case 0x6:
274 Inst.setOpcode(XCore::EQ_3r);
275 return Decode3RInstruction(Inst, Insn, Address, Decoder);
276 case 0x7:
277 Inst.setOpcode(XCore::AND_3r);
278 return Decode3RInstruction(Inst, Insn, Address, Decoder);
279 case 0x8:
280 Inst.setOpcode(XCore::OR_3r);
281 return Decode3RInstruction(Inst, Insn, Address, Decoder);
282 case 0x9:
283 Inst.setOpcode(XCore::LDW_3r);
284 return Decode3RInstruction(Inst, Insn, Address, Decoder);
285 case 0x10:
286 Inst.setOpcode(XCore::LD16S_3r);
287 return Decode3RInstruction(Inst, Insn, Address, Decoder);
288 case 0x11:
289 Inst.setOpcode(XCore::LD8U_3r);
290 return Decode3RInstruction(Inst, Insn, Address, Decoder);
291 case 0x12:
292 Inst.setOpcode(XCore::ADD_2rus);
293 return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
294 case 0x13:
295 Inst.setOpcode(XCore::SUB_2rus);
296 return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
297 case 0x14:
298 Inst.setOpcode(XCore::SHL_2rus);
299 return Decode2RUSBitpInstruction(Inst, Insn, Address, Decoder);
300 case 0x15:
301 Inst.setOpcode(XCore::SHR_2rus);
302 return Decode2RUSBitpInstruction(Inst, Insn, Address, Decoder);
303 case 0x16:
304 Inst.setOpcode(XCore::EQ_2rus);
305 return Decode2RUSInstruction(Inst, Insn, Address, Decoder);
306 case 0x17:
307 Inst.setOpcode(XCore::TSETR_3r);
308 return Decode3RImmInstruction(Inst, Insn, Address, Decoder);
309 case 0x18:
310 Inst.setOpcode(XCore::LSS_3r);
311 return Decode3RInstruction(Inst, Insn, Address, Decoder);
312 case 0x19:
313 Inst.setOpcode(XCore::LSU_3r);
314 return Decode3RInstruction(Inst, Insn, Address, Decoder);
315 }
316 return MCDisassembler::Fail;
317}
318
319static DecodeStatus Decode2RInstruction(MCInst &Inst, unsigned Insn,
320 uint64_t Address,
321 const MCDisassembler *Decoder) {
322 unsigned Op1, Op2;
323 DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
324 if (S != MCDisassembler::Success)
325 return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
326
327 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
328 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
329 return S;
330}
331
332static DecodeStatus Decode2RImmInstruction(MCInst &Inst, unsigned Insn,
333 uint64_t Address,
334 const MCDisassembler *Decoder) {
335 unsigned Op1, Op2;
336 DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
337 if (S != MCDisassembler::Success)
338 return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
339
340 Inst.addOperand(MCOperand::createImm(Op1));
341 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
342 return S;
343}
344
345static DecodeStatus DecodeR2RInstruction(MCInst &Inst, unsigned Insn,
346 uint64_t Address,
347 const MCDisassembler *Decoder) {
348 unsigned Op1, Op2;
349 DecodeStatus S = Decode2OpInstruction(Insn, Op2, Op1);
350 if (S != MCDisassembler::Success)
351 return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
352
353 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
354 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
355 return S;
356}
357
358static DecodeStatus Decode2RSrcDstInstruction(MCInst &Inst, unsigned Insn,
359 uint64_t Address,
360 const MCDisassembler *Decoder) {
361 unsigned Op1, Op2;
362 DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
363 if (S != MCDisassembler::Success)
364 return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
365
366 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
367 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
368 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
369 return S;
370}
371
372static DecodeStatus DecodeRUSInstruction(MCInst &Inst, unsigned Insn,
373 uint64_t Address,
374 const MCDisassembler *Decoder) {
375 unsigned Op1, Op2;
376 DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
377 if (S != MCDisassembler::Success)
378 return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
379
380 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
381 Inst.addOperand(MCOperand::createImm(Op2));
382 return S;
383}
384
385static DecodeStatus DecodeRUSBitpInstruction(MCInst &Inst, unsigned Insn,
386 uint64_t Address,
387 const MCDisassembler *Decoder) {
388 unsigned Op1, Op2;
389 DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
390 if (S != MCDisassembler::Success)
391 return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
392
393 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
394 DecodeBitpOperand(Inst, Op2, Address, Decoder);
395 return S;
396}
397
398static DecodeStatus
399DecodeRUSSrcDstBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
400 const MCDisassembler *Decoder) {
401 unsigned Op1, Op2;
402 DecodeStatus S = Decode2OpInstruction(Insn, Op1, Op2);
403 if (S != MCDisassembler::Success)
404 return Decode2OpInstructionFail(Inst, Insn, Address, Decoder);
405
406 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
407 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
408 DecodeBitpOperand(Inst, Op2, Address, Decoder);
409 return S;
410}
411
412static DecodeStatus DecodeL2OpInstructionFail(MCInst &Inst, unsigned Insn,
413 uint64_t Address,
414 const MCDisassembler *Decoder) {
415 // Try and decode as a L3R / L2RUS instruction.
416 unsigned Opcode = fieldFromInstruction(Insn, 16, 4) |
417 fieldFromInstruction(Insn, 27, 5) << 4;
418 switch (Opcode) {
419 case 0x0c:
420 Inst.setOpcode(XCore::STW_l3r);
421 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
422 case 0x1c:
423 Inst.setOpcode(XCore::XOR_l3r);
424 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
425 case 0x2c:
426 Inst.setOpcode(XCore::ASHR_l3r);
427 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
428 case 0x3c:
429 Inst.setOpcode(XCore::LDAWF_l3r);
430 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
431 case 0x4c:
432 Inst.setOpcode(XCore::LDAWB_l3r);
433 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
434 case 0x5c:
435 Inst.setOpcode(XCore::LDA16F_l3r);
436 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
437 case 0x6c:
438 Inst.setOpcode(XCore::LDA16B_l3r);
439 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
440 case 0x7c:
441 Inst.setOpcode(XCore::MUL_l3r);
442 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
443 case 0x8c:
444 Inst.setOpcode(XCore::DIVS_l3r);
445 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
446 case 0x9c:
447 Inst.setOpcode(XCore::DIVU_l3r);
448 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
449 case 0x10c:
450 Inst.setOpcode(XCore::ST16_l3r);
451 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
452 case 0x11c:
453 Inst.setOpcode(XCore::ST8_l3r);
454 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
455 case 0x12c:
456 Inst.setOpcode(XCore::ASHR_l2rus);
457 return DecodeL2RUSBitpInstruction(Inst, Insn, Address, Decoder);
458 case 0x12d:
459 Inst.setOpcode(XCore::OUTPW_l2rus);
460 return DecodeL2RUSBitpInstruction(Inst, Insn, Address, Decoder);
461 case 0x12e:
462 Inst.setOpcode(XCore::INPW_l2rus);
463 return DecodeL2RUSBitpInstruction(Inst, Insn, Address, Decoder);
464 case 0x13c:
465 Inst.setOpcode(XCore::LDAWF_l2rus);
466 return DecodeL2RUSInstruction(Inst, Insn, Address, Decoder);
467 case 0x14c:
468 Inst.setOpcode(XCore::LDAWB_l2rus);
469 return DecodeL2RUSInstruction(Inst, Insn, Address, Decoder);
470 case 0x15c:
471 Inst.setOpcode(XCore::CRC_l3r);
472 return DecodeL3RSrcDstInstruction(Inst, Insn, Address, Decoder);
473 case 0x18c:
474 Inst.setOpcode(XCore::REMS_l3r);
475 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
476 case 0x19c:
477 Inst.setOpcode(XCore::REMU_l3r);
478 return DecodeL3RInstruction(Inst, Insn, Address, Decoder);
479 }
480 return MCDisassembler::Fail;
481}
482
483static DecodeStatus DecodeL2RInstruction(MCInst &Inst, unsigned Insn,
484 uint64_t Address,
485 const MCDisassembler *Decoder) {
486 unsigned Op1, Op2;
487 DecodeStatus S = Decode2OpInstruction(fieldFromInstruction(Insn, 0, 16),
488 Op1, Op2);
489 if (S != MCDisassembler::Success)
490 return DecodeL2OpInstructionFail(Inst, Insn, Address, Decoder);
491
492 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
493 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
494 return S;
495}
496
497static DecodeStatus DecodeLR2RInstruction(MCInst &Inst, unsigned Insn,
498 uint64_t Address,
499 const MCDisassembler *Decoder) {
500 unsigned Op1, Op2;
501 DecodeStatus S = Decode2OpInstruction(fieldFromInstruction(Insn, 0, 16),
502 Op1, Op2);
503 if (S != MCDisassembler::Success)
504 return DecodeL2OpInstructionFail(Inst, Insn, Address, Decoder);
505
506 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
507 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
508 return S;
509}
510
511static DecodeStatus Decode3RInstruction(MCInst &Inst, unsigned Insn,
512 uint64_t Address,
513 const MCDisassembler *Decoder) {
514 unsigned Op1, Op2, Op3;
515 DecodeStatus S = Decode3OpInstruction(Insn, Op1, Op2, Op3);
516 if (S == MCDisassembler::Success) {
517 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
518 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
519 DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
520 }
521 return S;
522}
523
524static DecodeStatus Decode3RImmInstruction(MCInst &Inst, unsigned Insn,
525 uint64_t Address,
526 const MCDisassembler *Decoder) {
527 unsigned Op1, Op2, Op3;
528 DecodeStatus S = Decode3OpInstruction(Insn, Op1, Op2, Op3);
529 if (S == MCDisassembler::Success) {
530 Inst.addOperand(MCOperand::createImm(Op1));
531 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
532 DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
533 }
534 return S;
535}
536
537static DecodeStatus Decode2RUSInstruction(MCInst &Inst, unsigned Insn,
538 uint64_t Address,
539 const MCDisassembler *Decoder) {
540 unsigned Op1, Op2, Op3;
541 DecodeStatus S = Decode3OpInstruction(Insn, Op1, Op2, Op3);
542 if (S == MCDisassembler::Success) {
543 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
544 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
545 Inst.addOperand(MCOperand::createImm(Op3));
546 }
547 return S;
548}
549
550static DecodeStatus Decode2RUSBitpInstruction(MCInst &Inst, unsigned Insn,
551 uint64_t Address,
552 const MCDisassembler *Decoder) {
553 unsigned Op1, Op2, Op3;
554 DecodeStatus S = Decode3OpInstruction(Insn, Op1, Op2, Op3);
555 if (S == MCDisassembler::Success) {
556 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
557 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
558 DecodeBitpOperand(Inst, Op3, Address, Decoder);
559 }
560 return S;
561}
562
563static DecodeStatus DecodeL3RInstruction(MCInst &Inst, unsigned Insn,
564 uint64_t Address,
565 const MCDisassembler *Decoder) {
566 unsigned Op1, Op2, Op3;
567 DecodeStatus S =
568 Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
569 if (S == MCDisassembler::Success) {
570 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
571 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
572 DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
573 }
574 return S;
575}
576
577static DecodeStatus DecodeL3RSrcDstInstruction(MCInst &Inst, unsigned Insn,
578 uint64_t Address,
579 const MCDisassembler *Decoder) {
580 unsigned Op1, Op2, Op3;
581 DecodeStatus S =
582 Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
583 if (S == MCDisassembler::Success) {
584 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
585 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
586 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
587 DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
588 }
589 return S;
590}
591
592static DecodeStatus DecodeL2RUSInstruction(MCInst &Inst, unsigned Insn,
593 uint64_t Address,
594 const MCDisassembler *Decoder) {
595 unsigned Op1, Op2, Op3;
596 DecodeStatus S =
597 Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
598 if (S == MCDisassembler::Success) {
599 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
600 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
601 Inst.addOperand(MCOperand::createImm(Op3));
602 }
603 return S;
604}
605
606static DecodeStatus DecodeL2RUSBitpInstruction(MCInst &Inst, unsigned Insn,
607 uint64_t Address,
608 const MCDisassembler *Decoder) {
609 unsigned Op1, Op2, Op3;
610 DecodeStatus S =
611 Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
612 if (S == MCDisassembler::Success) {
613 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
614 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
615 DecodeBitpOperand(Inst, Op3, Address, Decoder);
616 }
617 return S;
618}
619
620static DecodeStatus DecodeL6RInstruction(MCInst &Inst, unsigned Insn,
621 uint64_t Address,
622 const MCDisassembler *Decoder) {
623 unsigned Op1, Op2, Op3, Op4, Op5, Op6;
624 DecodeStatus S =
625 Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
626 if (S != MCDisassembler::Success)
627 return S;
628 S = Decode3OpInstruction(fieldFromInstruction(Insn, 16, 16), Op4, Op5, Op6);
629 if (S != MCDisassembler::Success)
630 return S;
631 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
632 DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
633 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
634 DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
635 DecodeGRRegsRegisterClass(Inst, Op5, Address, Decoder);
636 DecodeGRRegsRegisterClass(Inst, Op6, Address, Decoder);
637 return S;
638}
639
640static DecodeStatus DecodeL5RInstructionFail(MCInst &Inst, unsigned Insn,
641 uint64_t Address,
642 const MCDisassembler *Decoder) {
643 // Try and decode as a L6R instruction.
644 Inst.clear();
645 unsigned Opcode = fieldFromInstruction(Insn, 27, 5);
646 switch (Opcode) {
647 case 0x00:
648 Inst.setOpcode(XCore::LMUL_l6r);
649 return DecodeL6RInstruction(Inst, Insn, Address, Decoder);
650 }
651 return MCDisassembler::Fail;
652}
653
654static DecodeStatus DecodeL5RInstruction(MCInst &Inst, unsigned Insn,
655 uint64_t Address,
656 const MCDisassembler *Decoder) {
657 unsigned Op1, Op2, Op3, Op4, Op5;
658 DecodeStatus S =
659 Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
660 if (S != MCDisassembler::Success)
661 return DecodeL5RInstructionFail(Inst, Insn, Address, Decoder);
662 S = Decode2OpInstruction(fieldFromInstruction(Insn, 16, 16), Op4, Op5);
663 if (S != MCDisassembler::Success)
664 return DecodeL5RInstructionFail(Inst, Insn, Address, Decoder);
665
666 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
667 DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
668 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
669 DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
670 DecodeGRRegsRegisterClass(Inst, Op5, Address, Decoder);
671 return S;
672}
673
674static DecodeStatus DecodeL4RSrcDstInstruction(MCInst &Inst, unsigned Insn,
675 uint64_t Address,
676 const MCDisassembler *Decoder) {
677 unsigned Op1, Op2, Op3;
678 unsigned Op4 = fieldFromInstruction(Insn, 16, 4);
679 DecodeStatus S =
680 Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
681 if (S == MCDisassembler::Success) {
682 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
683 S = DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
684 }
685 if (S == MCDisassembler::Success) {
686 DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
687 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
688 DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
689 }
690 return S;
691}
692
693static DecodeStatus
694DecodeL4RSrcDstSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
695 const MCDisassembler *Decoder) {
696 unsigned Op1, Op2, Op3;
697 unsigned Op4 = fieldFromInstruction(Insn, 16, 4);
698 DecodeStatus S =
699 Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
700 if (S == MCDisassembler::Success) {
701 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
702 S = DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
703 }
704 if (S == MCDisassembler::Success) {
705 DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
706 DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
707 DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
708 DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
709 }
710 return S;
711}
712
713MCDisassembler::DecodeStatus
714XCoreDisassembler::getInstruction(MCInst &instr, uint64_t &Size,
715 ArrayRef<uint8_t> Bytes, uint64_t Address,
716 raw_ostream &cStream) const {
717 uint16_t insn16;
718
719 if (!readInstruction16(Bytes, Address, Size, insn16)) {
720 return Fail;
721 }
722
723 // Calling the auto-generated decoder function.
724 DecodeStatus Result = decodeInstruction(DecoderTable16, instr, insn16,
725 Address, this, STI);
726 if (Result != Fail) {
727 Size = 2;
728 return Result;
729 }
730
731 uint32_t insn32;
732
733 if (!readInstruction32(Bytes, Address, Size, insn32)) {
734 return Fail;
735 }
736
737 // Calling the auto-generated decoder function.
738 Result = decodeInstruction(DecoderTable32, instr, insn32, Address, this, STI);
739 if (Result != Fail) {
740 Size = 4;
741 return Result;
742 }
743
744 return Fail;
745}
746
747static MCDisassembler *createXCoreDisassembler(const Target &T,
748 const MCSubtargetInfo &STI,
749 MCContext &Ctx) {
750 return new XCoreDisassembler(STI, Ctx);
751}
752
753extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeXCoreDisassembler() {
754 // Register the disassembler.
755 TargetRegistry::RegisterMCDisassembler(getTheXCoreTarget(),
756 createXCoreDisassembler);
757}
Fail
#define Fail
Definition: AArch64Disassembler.cpp:301
Insn
SmallVector< AArch64_IMM::ImmInsnModel, 4 > Insn
Definition: AArch64MIPeepholeOpt.cpp:141
D
static GCRegistry::Add< StatepointGC > D("statepoint-example", "an example strategy for statepoint")
LLVM_EXTERNAL_VISIBILITY
#define LLVM_EXTERNAL_VISIBILITY
Definition: Compiler.h:127
Size
uint64_t Size
Definition: ELFObjHandler.cpp:81
createXCoreDisassembler
static MCDisassembler * createXCoreDisassembler(const Target &T, const MCSubtargetInfo &STI, MCContext &Ctx)
Definition: XCoreDisassembler.cpp:747
Decode2RUSBitpInstruction
static DecodeStatus Decode2RUSBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:550
DecodeL2RUSBitpInstruction
static DecodeStatus DecodeL2RUSBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:606
DecodeRUSInstruction
static DecodeStatus DecodeRUSInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:372
DecodeLR2RInstruction
static DecodeStatus DecodeLR2RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:497
getReg
static unsigned getReg(const MCDisassembler *D, unsigned RC, unsigned RegNo)
Definition: XCoreDisassembler.cpp:69
DecodeStatus
MCDisassembler::DecodeStatus DecodeStatus
Definition: XCoreDisassembler.cpp:28
DecodeL4RSrcDstSrcDstInstruction
static DecodeStatus DecodeL4RSrcDstSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:694
DecodeRUSSrcDstBitpInstruction
static DecodeStatus DecodeRUSSrcDstBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:399
DecodeL2RUSInstruction
static DecodeStatus DecodeL2RUSInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:592
DecodeL4RSrcDstInstruction
static DecodeStatus DecodeL4RSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:674
DecodeBitpOperand
static DecodeStatus DecodeBitpOperand(MCInst &Inst, unsigned Val, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:196
DecodeL3RInstruction
static DecodeStatus DecodeL3RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:563
DecodeL2OpInstructionFail
static DecodeStatus DecodeL2OpInstructionFail(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:412
Decode2RUSInstruction
static DecodeStatus Decode2RUSInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:537
DecodeL3RSrcDstInstruction
static DecodeStatus DecodeL3RSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:577
DecodeL5RInstruction
static DecodeStatus DecodeL5RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:654
DecodeR2RInstruction
static DecodeStatus DecodeR2RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:345
Decode3OpInstruction
static DecodeStatus Decode3OpInstruction(unsigned Insn, unsigned &Op1, unsigned &Op2, unsigned &Op3)
Definition: XCoreDisassembler.cpp:234
DecodeL2RInstruction
static DecodeStatus DecodeL2RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:483
Decode3RImmInstruction
static DecodeStatus Decode3RImmInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:524
Decode2RImmInstruction
static DecodeStatus Decode2RImmInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:332
DecodeRRegsRegisterClass
static DecodeStatus DecodeRRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:186
DecodeGRRegsRegisterClass
static DecodeStatus DecodeGRRegsRegisterClass(MCInst &Inst, unsigned RegNo, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:176
readInstruction32
static bool readInstruction32(ArrayRef< uint8_t > Bytes, uint64_t Address, uint64_t &Size, uint32_t &Insn)
Definition: XCoreDisassembler.cpp:56
LLVMInitializeXCoreDisassembler
LLVM_EXTERNAL_VISIBILITY void LLVMInitializeXCoreDisassembler()
Definition: XCoreDisassembler.cpp:753
DecodeL5RInstructionFail
static DecodeStatus DecodeL5RInstructionFail(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:640
Decode2RSrcDstInstruction
static DecodeStatus Decode2RSrcDstInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:358
DecodeRUSBitpInstruction
static DecodeStatus DecodeRUSBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:385
DecodeL6RInstruction
static DecodeStatus DecodeL6RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:620
Decode2OpInstructionFail
static DecodeStatus Decode2OpInstructionFail(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:249
Decode2OpInstruction
static DecodeStatus Decode2OpInstruction(unsigned Insn, unsigned &Op1, unsigned &Op2)
Definition: XCoreDisassembler.cpp:216
DecodeNegImmOperand
static DecodeStatus DecodeNegImmOperand(MCInst &Inst, unsigned Val, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:208
Decode2RInstruction
static DecodeStatus Decode2RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:319
readInstruction16
static bool readInstruction16(ArrayRef< uint8_t > Bytes, uint64_t Address, uint64_t &Size, uint16_t &Insn)
Definition: XCoreDisassembler.cpp:44
Decode3RInstruction
static DecodeStatus Decode3RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const MCDisassembler *Decoder)
Definition: XCoreDisassembler.cpp:511
llvm::ArrayRef
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: ArrayRef.h:41
llvm::ArrayRef::size
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:163
llvm::MCContext
Context object for machine code objects.
Definition: MCContext.h:76
llvm::MCDisassembler
Superclass for all disassemblers.
Definition: MCDisassembler.h:79
llvm::MCDisassembler::DecodeStatus
DecodeStatus
Ternary decode status.
Definition: MCDisassembler.h:103
llvm::MCDisassembler::getInstruction
virtual DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, ArrayRef< uint8_t > Bytes, uint64_t Address, raw_ostream &CStream) const =0
Returns the disassembly of a single instruction.
llvm::MCInst
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
llvm::MCInst::addOperand
void addOperand(const MCOperand Op)
Definition: MCInst.h:210
llvm::MCInst::setOpcode
void setOpcode(unsigned Op)
Definition: MCInst.h:197
llvm::MCInst::clear
void clear()
Definition: MCInst.h:215
llvm::MCOperand::createReg
static MCOperand createReg(unsigned Reg)
Definition: MCInst.h:134
llvm::MCOperand::createImm
static MCOperand createImm(int64_t Val)
Definition: MCInst.h:141
llvm::MCRegisterInfo
MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc object...
Definition: MCRegisterInfo.h:135
llvm::MCSubtargetInfo
Generic base class for all target subtargets.
Definition: MCSubtargetInfo.h:76
llvm::Target
Target - Wrapper for Target specific information.
Definition: TargetRegistry.h:149
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
uint16_t
uint32_t
uint64_t
llvm::ms_demangle::QualifierMangleMode::Result
@ Result
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
llvm::getTheXCoreTarget
Target & getTheXCoreTarget()
Definition: XCoreTargetInfo.cpp:13
llvm::TargetRegistry::RegisterMCDisassembler
static void RegisterMCDisassembler(Target &T, Target::MCDisassemblerCtorTy Fn)
RegisterMCDisassembler - Register a MCDisassembler implementation for the given target.
Definition: TargetRegistry.h:972
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