5 #ifndef V8_ARM64_DECODER_ARM64_INL_H_ 6 #define V8_ARM64_DECODER_ARM64_INL_H_ 8 #include "src/arm64/decoder-arm64.h" 9 #include "src/globals.h" 10 #include "src/utils.h" 19 void Decoder<V>::Decode(Instruction *instr) {
20 if (instr->Bits(28, 27) == 0) {
21 V::VisitUnallocated(instr);
23 switch (instr->Bits(27, 24)) {
25 case 0x0: DecodePCRelAddressing(instr);
break;
28 case 0x1: DecodeAddSubImmediate(instr);
break;
41 case 0xB: DecodeDataProcessing(instr);
break;
45 case 0x2: DecodeLogical(instr);
break;
49 case 0x3: DecodeBitfieldExtract(instr);
break;
62 case 0x7: DecodeBranchSystemException(instr);
break;
77 case 0xD: DecodeLoadStore(instr);
break;
91 case 0xF: DecodeFP(instr);
break;
98 void Decoder<V>::DecodePCRelAddressing(Instruction* instr) {
99 DCHECK_EQ(0x0, instr->Bits(27, 24));
102 DCHECK_EQ(0x1, instr->Bit(28));
103 V::VisitPCRelAddressing(instr);
108 void Decoder<V>::DecodeBranchSystemException(Instruction* instr) {
109 DCHECK_EQ(0x4, instr->Bits(27, 24) & 0xC);
111 switch (instr->Bits(31, 29)) {
114 V::VisitUnconditionalBranch(instr);
119 if (instr->Bit(25) == 0) {
120 V::VisitCompareBranch(instr);
122 V::VisitTestBranch(instr);
127 if (instr->Bit(25) == 0) {
128 if ((instr->Bit(24) == 0x1) ||
129 (instr->Mask(0x01000010) == 0x00000010)) {
130 V::VisitUnallocated(instr);
132 V::VisitConditionalBranch(instr);
135 V::VisitUnallocated(instr);
140 if (instr->Bit(25) == 0) {
141 if (instr->Bit(24) == 0) {
142 if ((instr->Bits(4, 2) != 0) ||
143 (instr->Mask(0x00E0001D) == 0x00200001) ||
144 (instr->Mask(0x00E0001D) == 0x00400001) ||
145 (instr->Mask(0x00E0001E) == 0x00200002) ||
146 (instr->Mask(0x00E0001E) == 0x00400002) ||
147 (instr->Mask(0x00E0001C) == 0x00600000) ||
148 (instr->Mask(0x00E0001C) == 0x00800000) ||
149 (instr->Mask(0x00E0001F) == 0x00A00000) ||
150 (instr->Mask(0x00C0001C) == 0x00C00000)) {
151 V::VisitUnallocated(instr);
153 V::VisitException(instr);
156 if (instr->Bits(23, 22) == 0) {
157 const Instr masked_003FF0E0 = instr->Mask(0x003FF0E0);
158 if ((instr->Bits(21, 19) == 0x4) ||
159 (masked_003FF0E0 == 0x00033000) ||
160 (masked_003FF0E0 == 0x003FF020) ||
161 (masked_003FF0E0 == 0x003FF060) ||
162 (masked_003FF0E0 == 0x003FF0E0) ||
163 (instr->Mask(0x00388000) == 0x00008000) ||
164 (instr->Mask(0x0038E000) == 0x00000000) ||
165 (instr->Mask(0x0039E000) == 0x00002000) ||
166 (instr->Mask(0x003AE000) == 0x00002000) ||
167 (instr->Mask(0x003CE000) == 0x00042000) ||
168 (instr->Mask(0x0038F000) == 0x00005000) ||
169 (instr->Mask(0x0038E000) == 0x00006000)) {
170 V::VisitUnallocated(instr);
172 V::VisitSystem(instr);
175 V::VisitUnallocated(instr);
179 if ((instr->Bit(24) == 0x1) ||
180 (instr->Bits(20, 16) != 0x1F) ||
181 (instr->Bits(15, 10) != 0) ||
182 (instr->Bits(4, 0) != 0) ||
183 (instr->Bits(24, 21) == 0x3) ||
184 (instr->Bits(24, 22) == 0x3)) {
185 V::VisitUnallocated(instr);
187 V::VisitUnconditionalBranchToRegister(instr);
194 V::VisitUnallocated(instr);
202 void Decoder<V>::DecodeLoadStore(Instruction* instr) {
203 DCHECK_EQ(0x8, instr->Bits(27, 24) & 0xA);
205 if ((instr->Bit(28) == 0) && (instr->Bit(29) == 0) && (instr->Bit(26) == 1)) {
206 DecodeNEONLoadStore(instr);
210 if (instr->Bit(24) == 0) {
211 if (instr->Bit(28) == 0) {
212 if (instr->Bit(29) == 0) {
213 if (instr->Bit(26) == 0) {
214 if (instr->Mask(0xA08000) == 0x800000 ||
215 instr->Mask(0xA00000) == 0xA00000) {
216 V::VisitUnallocated(instr);
217 }
else if (instr->Mask(0x808000) == 0) {
219 V::VisitUnimplemented(instr);
221 V::VisitLoadStoreAcquireRelease(instr);
225 if ((instr->Bits(31, 30) == 0x3) ||
226 (instr->Mask(0xC4400000) == 0x40000000)) {
227 V::VisitUnallocated(instr);
229 if (instr->Bit(23) == 0) {
230 if (instr->Mask(0xC4400000) == 0xC0400000) {
231 V::VisitUnallocated(instr);
234 V::VisitUnimplemented(instr);
237 V::VisitLoadStorePairPostIndex(instr);
242 if (instr->Bit(29) == 0) {
243 if (instr->Mask(0xC4000000) == 0xC4000000) {
244 V::VisitUnallocated(instr);
246 V::VisitLoadLiteral(instr);
249 if ((instr->Mask(0x84C00000) == 0x80C00000) ||
250 (instr->Mask(0x44800000) == 0x44800000) ||
251 (instr->Mask(0x84800000) == 0x84800000)) {
252 V::VisitUnallocated(instr);
254 if (instr->Bit(21) == 0) {
255 switch (instr->Bits(11, 10)) {
257 V::VisitLoadStoreUnscaledOffset(instr);
261 if (instr->Mask(0xC4C00000) == 0xC0800000) {
262 V::VisitUnallocated(instr);
264 V::VisitLoadStorePostIndex(instr);
270 V::VisitUnimplemented(instr);
274 if (instr->Mask(0xC4C00000) == 0xC0800000) {
275 V::VisitUnallocated(instr);
277 V::VisitLoadStorePreIndex(instr);
283 if (instr->Bits(11, 10) == 0x2) {
284 if (instr->Bit(14) == 0) {
285 V::VisitUnallocated(instr);
287 V::VisitLoadStoreRegisterOffset(instr);
290 V::VisitUnallocated(instr);
297 if (instr->Bit(28) == 0) {
298 if (instr->Bit(29) == 0) {
299 V::VisitUnallocated(instr);
301 if ((instr->Bits(31, 30) == 0x3) ||
302 (instr->Mask(0xC4400000) == 0x40000000)) {
303 V::VisitUnallocated(instr);
305 if (instr->Bit(23) == 0) {
306 V::VisitLoadStorePairOffset(instr);
308 V::VisitLoadStorePairPreIndex(instr);
313 if (instr->Bit(29) == 0) {
314 V::VisitUnallocated(instr);
316 if ((instr->Mask(0x84C00000) == 0x80C00000) ||
317 (instr->Mask(0x44800000) == 0x44800000) ||
318 (instr->Mask(0x84800000) == 0x84800000)) {
319 V::VisitUnallocated(instr);
321 V::VisitLoadStoreUnsignedOffset(instr);
330 void Decoder<V>::DecodeLogical(Instruction* instr) {
331 DCHECK_EQ(0x2, instr->Bits(27, 24));
333 if (instr->Mask(0x80400000) == 0x00400000) {
334 V::VisitUnallocated(instr);
336 if (instr->Bit(23) == 0) {
337 V::VisitLogicalImmediate(instr);
339 if (instr->Bits(30, 29) == 0x1) {
340 V::VisitUnallocated(instr);
342 V::VisitMoveWideImmediate(instr);
350 void Decoder<V>::DecodeBitfieldExtract(Instruction* instr) {
351 DCHECK_EQ(0x3, instr->Bits(27, 24));
353 if ((instr->Mask(0x80400000) == 0x80000000) ||
354 (instr->Mask(0x80400000) == 0x00400000) ||
355 (instr->Mask(0x80008000) == 0x00008000)) {
356 V::VisitUnallocated(instr);
357 }
else if (instr->Bit(23) == 0) {
358 if ((instr->Mask(0x80200000) == 0x00200000) ||
359 (instr->Mask(0x60000000) == 0x60000000)) {
360 V::VisitUnallocated(instr);
362 V::VisitBitfield(instr);
365 if ((instr->Mask(0x60200000) == 0x00200000) ||
366 (instr->Mask(0x60000000) != 0x00000000)) {
367 V::VisitUnallocated(instr);
369 V::VisitExtract(instr);
376 void Decoder<V>::DecodeAddSubImmediate(Instruction* instr) {
377 DCHECK_EQ(0x1, instr->Bits(27, 24));
378 if (instr->Bit(23) == 1) {
379 V::VisitUnallocated(instr);
381 V::VisitAddSubImmediate(instr);
387 void Decoder<V>::DecodeDataProcessing(Instruction* instr) {
388 DCHECK((instr->Bits(27, 24) == 0xA) ||
389 (instr->Bits(27, 24) == 0xB) );
391 if (instr->Bit(24) == 0) {
392 if (instr->Bit(28) == 0) {
393 if (instr->Mask(0x80008000) == 0x00008000) {
394 V::VisitUnallocated(instr);
396 V::VisitLogicalShifted(instr);
399 switch (instr->Bits(23, 21)) {
401 if (instr->Mask(0x0000FC00) != 0) {
402 V::VisitUnallocated(instr);
404 V::VisitAddSubWithCarry(instr);
409 if ((instr->Bit(29) == 0) ||
410 (instr->Mask(0x00000410) != 0)) {
411 V::VisitUnallocated(instr);
413 if (instr->Bit(11) == 0) {
414 V::VisitConditionalCompareRegister(instr);
416 V::VisitConditionalCompareImmediate(instr);
422 if (instr->Mask(0x20000800) != 0x00000000) {
423 V::VisitUnallocated(instr);
425 V::VisitConditionalSelect(instr);
430 if (instr->Bit(29) == 0x1) {
431 V::VisitUnallocated(instr);
433 if (instr->Bit(30) == 0) {
434 if ((instr->Bit(15) == 0x1) ||
435 (instr->Bits(15, 11) == 0) ||
436 (instr->Bits(15, 12) == 0x1) ||
437 (instr->Bits(15, 12) == 0x3) ||
438 (instr->Bits(15, 13) == 0x3) ||
439 (instr->Mask(0x8000EC00) == 0x00004C00) ||
440 (instr->Mask(0x8000E800) == 0x80004000) ||
441 (instr->Mask(0x8000E400) == 0x80004000)) {
442 V::VisitUnallocated(instr);
444 V::VisitDataProcessing2Source(instr);
447 if ((instr->Bit(13) == 1) ||
448 (instr->Bits(20, 16) != 0) ||
449 (instr->Bits(15, 14) != 0) ||
450 (instr->Mask(0xA01FFC00) == 0x00000C00) ||
451 (instr->Mask(0x201FF800) == 0x00001800)) {
452 V::VisitUnallocated(instr);
454 V::VisitDataProcessing1Source(instr);
464 case 7: V::VisitUnallocated(instr);
break;
468 if (instr->Bit(28) == 0) {
469 if (instr->Bit(21) == 0) {
470 if ((instr->Bits(23, 22) == 0x3) ||
471 (instr->Mask(0x80008000) == 0x00008000)) {
472 V::VisitUnallocated(instr);
474 V::VisitAddSubShifted(instr);
477 if ((instr->Mask(0x00C00000) != 0x00000000) ||
478 (instr->Mask(0x00001400) == 0x00001400) ||
479 (instr->Mask(0x00001800) == 0x00001800)) {
480 V::VisitUnallocated(instr);
482 V::VisitAddSubExtended(instr);
486 if ((instr->Bit(30) == 0x1) ||
487 (instr->Bits(30, 29) == 0x1) ||
488 (instr->Mask(0xE0600000) == 0x00200000) ||
489 (instr->Mask(0xE0608000) == 0x00400000) ||
490 (instr->Mask(0x60608000) == 0x00408000) ||
491 (instr->Mask(0x60E00000) == 0x00E00000) ||
492 (instr->Mask(0x60E00000) == 0x00800000) ||
493 (instr->Mask(0x60E00000) == 0x00600000)) {
494 V::VisitUnallocated(instr);
496 V::VisitDataProcessing3Source(instr);
504 void Decoder<V>::DecodeFP(Instruction* instr) {
505 DCHECK((instr->Bits(27, 24) == 0xE) ||
506 (instr->Bits(27, 24) == 0xF) );
508 if (instr->Bit(28) == 0) {
509 DecodeNEONVectorDataProcessing(instr);
511 if (instr->Bits(31, 30) == 0x3) {
512 V::VisitUnallocated(instr);
513 }
else if (instr->Bits(31, 30) == 0x1) {
514 DecodeNEONScalarDataProcessing(instr);
516 if (instr->Bit(29) == 0) {
517 if (instr->Bit(24) == 0) {
518 if (instr->Bit(21) == 0) {
519 if ((instr->Bit(23) == 1) ||
520 (instr->Bit(18) == 1) ||
521 (instr->Mask(0x80008000) == 0x00000000) ||
522 (instr->Mask(0x000E0000) == 0x00000000) ||
523 (instr->Mask(0x000E0000) == 0x000A0000) ||
524 (instr->Mask(0x00160000) == 0x00000000) ||
525 (instr->Mask(0x00160000) == 0x00120000)) {
526 V::VisitUnallocated(instr);
528 V::VisitFPFixedPointConvert(instr);
531 if (instr->Bits(15, 10) == 32) {
532 V::VisitUnallocated(instr);
533 }
else if (instr->Bits(15, 10) == 0) {
534 if ((instr->Bits(23, 22) == 0x3) ||
535 (instr->Mask(0x000E0000) == 0x000A0000) ||
536 (instr->Mask(0x000E0000) == 0x000C0000) ||
537 (instr->Mask(0x00160000) == 0x00120000) ||
538 (instr->Mask(0x00160000) == 0x00140000) ||
539 (instr->Mask(0x20C40000) == 0x00800000) ||
540 (instr->Mask(0x20C60000) == 0x00840000) ||
541 (instr->Mask(0xA0C60000) == 0x80060000) ||
542 (instr->Mask(0xA0C60000) == 0x00860000) ||
543 (instr->Mask(0xA0C60000) == 0x00460000) ||
544 (instr->Mask(0xA0CE0000) == 0x80860000) ||
545 (instr->Mask(0xA0CE0000) == 0x804E0000) ||
546 (instr->Mask(0xA0CE0000) == 0x000E0000) ||
547 (instr->Mask(0xA0D60000) == 0x00160000) ||
548 (instr->Mask(0xA0D60000) == 0x80560000) ||
549 (instr->Mask(0xA0D60000) == 0x80960000)) {
550 V::VisitUnallocated(instr);
552 V::VisitFPIntegerConvert(instr);
554 }
else if (instr->Bits(14, 10) == 16) {
555 const Instr masked_A0DF8000 = instr->Mask(0xA0DF8000);
556 if ((instr->Mask(0x80180000) != 0) ||
557 (masked_A0DF8000 == 0x00020000) ||
558 (masked_A0DF8000 == 0x00030000) ||
559 (masked_A0DF8000 == 0x00068000) ||
560 (masked_A0DF8000 == 0x00428000) ||
561 (masked_A0DF8000 == 0x00430000) ||
562 (masked_A0DF8000 == 0x00468000) ||
563 (instr->Mask(0xA0D80000) == 0x00800000) ||
564 (instr->Mask(0xA0DE0000) == 0x00C00000) ||
565 (instr->Mask(0xA0DF0000) == 0x00C30000) ||
566 (instr->Mask(0xA0DC0000) == 0x00C40000)) {
567 V::VisitUnallocated(instr);
569 V::VisitFPDataProcessing1Source(instr);
571 }
else if (instr->Bits(13, 10) == 8) {
572 if ((instr->Bits(15, 14) != 0) ||
573 (instr->Bits(2, 0) != 0) ||
574 (instr->Mask(0x80800000) != 0x00000000)) {
575 V::VisitUnallocated(instr);
577 V::VisitFPCompare(instr);
579 }
else if (instr->Bits(12, 10) == 4) {
580 if ((instr->Bits(9, 5) != 0) ||
581 (instr->Mask(0x80800000) != 0x00000000)) {
582 V::VisitUnallocated(instr);
584 V::VisitFPImmediate(instr);
587 if (instr->Mask(0x80800000) != 0x00000000) {
588 V::VisitUnallocated(instr);
590 switch (instr->Bits(11, 10)) {
592 V::VisitFPConditionalCompare(instr);
596 if ((instr->Bits(15, 14) == 0x3) ||
597 (instr->Mask(0x00009000) == 0x00009000) ||
598 (instr->Mask(0x0000A000) == 0x0000A000)) {
599 V::VisitUnallocated(instr);
601 V::VisitFPDataProcessing2Source(instr);
606 V::VisitFPConditionalSelect(instr);
609 default: UNREACHABLE();
616 DCHECK_EQ(0, instr->Bit(30));
617 if (instr->Mask(0xA0800000) != 0) {
618 V::VisitUnallocated(instr);
620 V::VisitFPDataProcessing3Source(instr);
624 V::VisitUnallocated(instr);
630 template <
typename V>
631 void Decoder<V>::DecodeNEONLoadStore(Instruction* instr) {
632 DCHECK_EQ(0x6, instr->Bits(29, 25));
633 if (instr->Bit(31) == 0) {
634 if ((instr->Bit(24) == 0) && (instr->Bit(21) == 1)) {
635 V::VisitUnallocated(instr);
639 if (instr->Bit(23) == 0) {
640 if (instr->Bits(20, 16) == 0) {
641 if (instr->Bit(24) == 0) {
642 V::VisitNEONLoadStoreMultiStruct(instr);
644 V::VisitNEONLoadStoreSingleStruct(instr);
647 V::VisitUnallocated(instr);
650 if (instr->Bit(24) == 0) {
651 V::VisitNEONLoadStoreMultiStructPostIndex(instr);
653 V::VisitNEONLoadStoreSingleStructPostIndex(instr);
657 V::VisitUnallocated(instr);
661 template <
typename V>
662 void Decoder<V>::DecodeNEONVectorDataProcessing(Instruction* instr) {
663 DCHECK_EQ(0x7, instr->Bits(28, 25));
664 if (instr->Bit(31) == 0) {
665 if (instr->Bit(24) == 0) {
666 if (instr->Bit(21) == 0) {
667 if (instr->Bit(15) == 0) {
668 if (instr->Bit(10) == 0) {
669 if (instr->Bit(29) == 0) {
670 if (instr->Bit(11) == 0) {
671 V::VisitNEONTable(instr);
673 V::VisitNEONPerm(instr);
676 V::VisitNEONExtract(instr);
679 if (instr->Bits(23, 22) == 0) {
680 V::VisitNEONCopy(instr);
682 V::VisitUnallocated(instr);
686 V::VisitUnallocated(instr);
689 if (instr->Bit(10) == 0) {
690 if (instr->Bit(11) == 0) {
691 V::VisitNEON3Different(instr);
693 if (instr->Bits(18, 17) == 0) {
694 if (instr->Bit(20) == 0) {
695 if (instr->Bit(19) == 0) {
696 V::VisitNEON2RegMisc(instr);
698 if (instr->Bits(30, 29) == 0x2) {
699 V::VisitUnallocated(instr);
701 V::VisitUnallocated(instr);
705 if (instr->Bit(19) == 0) {
706 V::VisitNEONAcrossLanes(instr);
708 V::VisitUnallocated(instr);
712 V::VisitUnallocated(instr);
716 V::VisitNEON3Same(instr);
720 if (instr->Bit(10) == 0) {
721 V::VisitNEONByIndexedElement(instr);
723 if (instr->Bit(23) == 0) {
724 if (instr->Bits(22, 19) == 0) {
725 V::VisitNEONModifiedImmediate(instr);
727 V::VisitNEONShiftImmediate(instr);
730 V::VisitUnallocated(instr);
735 V::VisitUnallocated(instr);
739 template <
typename V>
740 void Decoder<V>::DecodeNEONScalarDataProcessing(Instruction* instr) {
741 DCHECK_EQ(0xF, instr->Bits(28, 25));
742 if (instr->Bit(24) == 0) {
743 if (instr->Bit(21) == 0) {
744 if (instr->Bit(15) == 0) {
745 if (instr->Bit(10) == 0) {
746 if (instr->Bit(29) == 0) {
747 if (instr->Bit(11) == 0) {
748 V::VisitUnallocated(instr);
750 V::VisitUnallocated(instr);
753 V::VisitUnallocated(instr);
756 if (instr->Bits(23, 22) == 0) {
757 V::VisitNEONScalarCopy(instr);
759 V::VisitUnallocated(instr);
763 V::VisitUnallocated(instr);
766 if (instr->Bit(10) == 0) {
767 if (instr->Bit(11) == 0) {
768 V::VisitNEONScalar3Diff(instr);
770 if (instr->Bits(18, 17) == 0) {
771 if (instr->Bit(20) == 0) {
772 if (instr->Bit(19) == 0) {
773 V::VisitNEONScalar2RegMisc(instr);
775 if (instr->Bit(29) == 0) {
776 V::VisitUnallocated(instr);
778 V::VisitUnallocated(instr);
782 if (instr->Bit(19) == 0) {
783 V::VisitNEONScalarPairwise(instr);
785 V::VisitUnallocated(instr);
789 V::VisitUnallocated(instr);
793 V::VisitNEONScalar3Same(instr);
797 if (instr->Bit(10) == 0) {
798 V::VisitNEONScalarByIndexedElement(instr);
800 if (instr->Bit(23) == 0) {
801 V::VisitNEONScalarShiftImmediate(instr);
803 V::VisitUnallocated(instr);
813 #endif // V8_ARM64_DECODER_ARM64_INL_H_