summaryrefslogtreecommitdiffstats
path: root/js/src/jit/arm/LIR-arm.h
blob: 8b41b2bd60d97760d78daed33e76ba6989664f14 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef jit_arm_LIR_arm_h
#define jit_arm_LIR_arm_h

namespace js {
namespace jit {

class LBoxFloatingPoint : public LInstructionHelper<2, 1, 1>
{
    MIRType type_;

  public:
    LIR_HEADER(BoxFloatingPoint);

    LBoxFloatingPoint(const LAllocation& in, const LDefinition& temp, MIRType type)
      : type_(type)
    {
        setOperand(0, in);
        setTemp(0, temp);
    }

    MIRType type() const {
        return type_;
    }
    const char* extraName() const {
        return StringFromMIRType(type_);
    }
};

class LUnbox : public LInstructionHelper<1, 2, 0>
{
  public:
    LIR_HEADER(Unbox);

    MUnbox* mir() const {
        return mir_->toUnbox();
    }
    const LAllocation* payload() {
        return getOperand(0);
    }
    const LAllocation* type() {
        return getOperand(1);
    }
    const char* extraName() const {
        return StringFromMIRType(mir()->type());
    }
};

class LUnboxFloatingPoint : public LInstructionHelper<1, 2, 0>
{
    MIRType type_;

  public:
    LIR_HEADER(UnboxFloatingPoint);

    static const size_t Input = 0;

    LUnboxFloatingPoint(const LBoxAllocation& input, MIRType type)
      : type_(type)
    {
        setBoxOperand(Input, input);
    }

    MUnbox* mir() const {
        return mir_->toUnbox();
    }

    MIRType type() const {
        return type_;
    }
    const char* extraName() const {
        return StringFromMIRType(type_);
    }
};

// Convert a 32-bit unsigned integer to a double.
class LWasmUint32ToDouble : public LInstructionHelper<1, 1, 0>
{
  public:
    LIR_HEADER(WasmUint32ToDouble)

    LWasmUint32ToDouble(const LAllocation& input) {
        setOperand(0, input);
    }
};

// Convert a 32-bit unsigned integer to a float32.
class LWasmUint32ToFloat32 : public LInstructionHelper<1, 1, 0>
{
  public:
    LIR_HEADER(WasmUint32ToFloat32)

    LWasmUint32ToFloat32(const LAllocation& input) {
        setOperand(0, input);
    }
};

class LDivI : public LBinaryMath<1>
{
  public:
    LIR_HEADER(DivI);

    LDivI(const LAllocation& lhs, const LAllocation& rhs,
          const LDefinition& temp) {
        setOperand(0, lhs);
        setOperand(1, rhs);
        setTemp(0, temp);
    }

    MDiv* mir() const {
        return mir_->toDiv();
    }
};

class LDivOrModI64 : public LCallInstructionHelper<INT64_PIECES, INT64_PIECES*2, 0>
{
  public:
    LIR_HEADER(DivOrModI64)

    static const size_t Lhs = 0;
    static const size_t Rhs = INT64_PIECES;

    LDivOrModI64(const LInt64Allocation& lhs, const LInt64Allocation& rhs)
    {
        setInt64Operand(Lhs, lhs);
        setInt64Operand(Rhs, rhs);
    }

    MBinaryArithInstruction* mir() const {
        MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
        return static_cast<MBinaryArithInstruction*>(mir_);
    }
    bool canBeDivideByZero() const {
        if (mir_->isMod())
            return mir_->toMod()->canBeDivideByZero();
        return mir_->toDiv()->canBeDivideByZero();
    }
    bool canBeNegativeOverflow() const {
        if (mir_->isMod())
            return mir_->toMod()->canBeNegativeDividend();
        return mir_->toDiv()->canBeNegativeOverflow();
    }
    wasm::TrapOffset trapOffset() const {
        MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
        if (mir_->isMod())
            return mir_->toMod()->trapOffset();
        return mir_->toDiv()->trapOffset();
    }
};

class LUDivOrModI64 : public LCallInstructionHelper<INT64_PIECES, INT64_PIECES*2, 0>
{
  public:
    LIR_HEADER(UDivOrModI64)

    static const size_t Lhs = 0;
    static const size_t Rhs = INT64_PIECES;

    LUDivOrModI64(const LInt64Allocation& lhs, const LInt64Allocation& rhs)
    {
        setInt64Operand(Lhs, lhs);
        setInt64Operand(Rhs, rhs);
    }

    MBinaryArithInstruction* mir() const {
        MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
        return static_cast<MBinaryArithInstruction*>(mir_);
    }
    bool canBeDivideByZero() const {
        if (mir_->isMod())
            return mir_->toMod()->canBeDivideByZero();
        return mir_->toDiv()->canBeDivideByZero();
    }
    bool canBeNegativeOverflow() const {
        if (mir_->isMod())
            return mir_->toMod()->canBeNegativeDividend();
        return mir_->toDiv()->canBeNegativeOverflow();
    }
    wasm::TrapOffset trapOffset() const {
        MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
        if (mir_->isMod())
            return mir_->toMod()->trapOffset();
        return mir_->toDiv()->trapOffset();
    }
};

// LSoftDivI is a software divide for ARM cores that don't support a hardware
// divide instruction.
//
// It is implemented as a proper C function so it trashes r0, r1, r2 and r3.
// The call also trashes lr, and has the ability to trash ip. The function also
// takes two arguments (dividend in r0, divisor in r1). The LInstruction gets
// encoded such that the divisor and dividend are passed in their apropriate
// registers and end their life at the start of the instruction by the use of
// useFixedAtStart. The result is returned in r0 and the other three registers
// that can be trashed are marked as temps. For the time being, the link
// register is not marked as trashed because we never allocate to the link
// register. The FP registers are not trashed.
class LSoftDivI : public LBinaryMath<3>
{
  public:
    LIR_HEADER(SoftDivI);

    LSoftDivI(const LAllocation& lhs, const LAllocation& rhs,
              const LDefinition& temp1, const LDefinition& temp2, const LDefinition& temp3) {
        setOperand(0, lhs);
        setOperand(1, rhs);
        setTemp(0, temp1);
        setTemp(1, temp2);
        setTemp(2, temp3);
    }

    MDiv* mir() const {
        return mir_->toDiv();
    }
};

class LDivPowTwoI : public LInstructionHelper<1, 1, 0>
{
    const int32_t shift_;

  public:
    LIR_HEADER(DivPowTwoI)

    LDivPowTwoI(const LAllocation& lhs, int32_t shift)
      : shift_(shift)
    {
        setOperand(0, lhs);
    }

    const LAllocation* numerator() {
        return getOperand(0);
    }

    int32_t shift() {
        return shift_;
    }

    MDiv* mir() const {
        return mir_->toDiv();
    }
};

class LModI : public LBinaryMath<1>
{
  public:
    LIR_HEADER(ModI);

    LModI(const LAllocation& lhs, const LAllocation& rhs,
          const LDefinition& callTemp)
    {
        setOperand(0, lhs);
        setOperand(1, rhs);
        setTemp(0, callTemp);
    }

    const LDefinition* callTemp() {
        return getTemp(0);
    }

    MMod* mir() const {
        return mir_->toMod();
    }
};

class LSoftModI : public LBinaryMath<4>
{
  public:
    LIR_HEADER(SoftModI);

    LSoftModI(const LAllocation& lhs, const LAllocation& rhs,
              const LDefinition& temp1, const LDefinition& temp2, const LDefinition& temp3,
              const LDefinition& callTemp)
    {
        setOperand(0, lhs);
        setOperand(1, rhs);
        setTemp(0, temp1);
        setTemp(1, temp2);
        setTemp(2, temp3);
        setTemp(3, callTemp);
    }

    const LDefinition* callTemp() {
        return getTemp(3);
    }

    MMod* mir() const {
        return mir_->toMod();
    }
};

class LModPowTwoI : public LInstructionHelper<1, 1, 0>
{
    const int32_t shift_;

  public:
    LIR_HEADER(ModPowTwoI);
    int32_t shift()
    {
        return shift_;
    }

    LModPowTwoI(const LAllocation& lhs, int32_t shift)
      : shift_(shift)
    {
        setOperand(0, lhs);
    }

    MMod* mir() const {
        return mir_->toMod();
    }
};

class LModMaskI : public LInstructionHelper<1, 1, 2>
{
    const int32_t shift_;

  public:
    LIR_HEADER(ModMaskI);

    LModMaskI(const LAllocation& lhs, const LDefinition& temp1, const LDefinition& temp2,
              int32_t shift)
      : shift_(shift)
    {
        setOperand(0, lhs);
        setTemp(0, temp1);
        setTemp(1, temp2);
    }

    int32_t shift() const {
        return shift_;
    }

    MMod* mir() const {
        return mir_->toMod();
    }
};

// Takes a tableswitch with an integer to decide.
class LTableSwitch : public LInstructionHelper<0, 1, 1>
{
  public:
    LIR_HEADER(TableSwitch);

    LTableSwitch(const LAllocation& in, const LDefinition& inputCopy, MTableSwitch* ins) {
        setOperand(0, in);
        setTemp(0, inputCopy);
        setMir(ins);
    }

    MTableSwitch* mir() const {
        return mir_->toTableSwitch();
    }

    const LAllocation* index() {
        return getOperand(0);
    }
    const LDefinition* tempInt() {
        return getTemp(0);
    }
    // This is added to share the same CodeGenerator prefixes.
    const LDefinition* tempPointer() {
        return nullptr;
    }
};

// Takes a tableswitch with an integer to decide.
class LTableSwitchV : public LInstructionHelper<0, BOX_PIECES, 2>
{
  public:
    LIR_HEADER(TableSwitchV);

    LTableSwitchV(const LBoxAllocation& input, const LDefinition& inputCopy,
                  const LDefinition& floatCopy, MTableSwitch* ins)
    {
        setBoxOperand(InputValue, input);
        setTemp(0, inputCopy);
        setTemp(1, floatCopy);
        setMir(ins);
    }

    MTableSwitch* mir() const {
        return mir_->toTableSwitch();
    }

    static const size_t InputValue = 0;

    const LDefinition* tempInt() {
        return getTemp(0);
    }
    const LDefinition* tempFloat() {
        return getTemp(1);
    }
    const LDefinition* tempPointer() {
        return nullptr;
    }
};

class LGuardShape : public LInstructionHelper<0, 1, 1>
{
  public:
    LIR_HEADER(GuardShape);

    LGuardShape(const LAllocation& in, const LDefinition& temp) {
        setOperand(0, in);
        setTemp(0, temp);
    }
    const MGuardShape* mir() const {
        return mir_->toGuardShape();
    }
    const LDefinition* tempInt() {
        return getTemp(0);
    }
};

class LGuardObjectGroup : public LInstructionHelper<0, 1, 1>
{
  public:
    LIR_HEADER(GuardObjectGroup);

    LGuardObjectGroup(const LAllocation& in, const LDefinition& temp) {
        setOperand(0, in);
        setTemp(0, temp);
    }
    const MGuardObjectGroup* mir() const {
        return mir_->toGuardObjectGroup();
    }
    const LDefinition* tempInt() {
        return getTemp(0);
    }
};

class LMulI : public LBinaryMath<0>
{
  public:
    LIR_HEADER(MulI);

    MMul* mir() {
        return mir_->toMul();
    }
};

class LUDiv : public LBinaryMath<0>
{
  public:
    LIR_HEADER(UDiv);

    MDiv* mir() {
        return mir_->toDiv();
    }
};

class LUMod : public LBinaryMath<0>
{
  public:
    LIR_HEADER(UMod);

    MMod* mir() {
        return mir_->toMod();
    }
};

class LSoftUDivOrMod : public LBinaryMath<3>
{
  public:
    LIR_HEADER(SoftUDivOrMod);

    LSoftUDivOrMod(const LAllocation& lhs, const LAllocation& rhs, const LDefinition& temp1,
                   const LDefinition& temp2, const LDefinition& temp3) {
        setOperand(0, lhs);
        setOperand(1, rhs);
        setTemp(0, temp1);
        setTemp(1, temp2);
        setTemp(2, temp3);
    }

    MInstruction* mir() {
        return mir_->toInstruction();
    }
};

class LAsmJSCompareExchangeCallout : public LCallInstructionHelper<1, 4, 2>
{
  public:
    LIR_HEADER(AsmJSCompareExchangeCallout)
    LAsmJSCompareExchangeCallout(const LAllocation& ptr, const LAllocation& oldval,
                                 const LAllocation& newval, const LAllocation& tls,
                                 const LDefinition& temp1, const LDefinition& temp2)
    {
        setOperand(0, ptr);
        setOperand(1, oldval);
        setOperand(2, newval);
        setOperand(3, tls);
        setTemp(0, temp1);
        setTemp(1, temp2);
    }
    const LAllocation* ptr() {
        return getOperand(0);
    }
    const LAllocation* oldval() {
        return getOperand(1);
    }
    const LAllocation* newval() {
        return getOperand(2);
    }
    const LAllocation* tls() {
        return getOperand(3);
    }

    const MAsmJSCompareExchangeHeap* mir() const {
        return mir_->toAsmJSCompareExchangeHeap();
    }
};

class LAsmJSAtomicExchangeCallout : public LCallInstructionHelper<1, 3, 2>
{
  public:
    LIR_HEADER(AsmJSAtomicExchangeCallout)

    LAsmJSAtomicExchangeCallout(const LAllocation& ptr, const LAllocation& value,
                                const LAllocation& tls, const LDefinition& temp1,
                                const LDefinition& temp2)
    {
        setOperand(0, ptr);
        setOperand(1, value);
        setOperand(2, tls);
        setTemp(0, temp1);
        setTemp(1, temp2);
    }
    const LAllocation* ptr() {
        return getOperand(0);
    }
    const LAllocation* value() {
        return getOperand(1);
    }
    const LAllocation* tls() {
        return getOperand(2);
    }

    const MAsmJSAtomicExchangeHeap* mir() const {
        return mir_->toAsmJSAtomicExchangeHeap();
    }
};

class LAsmJSAtomicBinopCallout : public LCallInstructionHelper<1, 3, 2>
{
  public:
    LIR_HEADER(AsmJSAtomicBinopCallout)
    LAsmJSAtomicBinopCallout(const LAllocation& ptr, const LAllocation& value,
                             const LAllocation& tls, const LDefinition& temp1,
                             const LDefinition& temp2)
    {
        setOperand(0, ptr);
        setOperand(1, value);
        setOperand(2, tls);
        setTemp(0, temp1);
        setTemp(1, temp2);
    }
    const LAllocation* ptr() {
        return getOperand(0);
    }
    const LAllocation* value() {
        return getOperand(1);
    }
    const LAllocation* tls() {
        return getOperand(2);
    }

    const MAsmJSAtomicBinopHeap* mir() const {
        return mir_->toAsmJSAtomicBinopHeap();
    }
};

class LWasmTruncateToInt64 : public LCallInstructionHelper<INT64_PIECES, 1, 0>
{
  public:
    LIR_HEADER(WasmTruncateToInt64);

    LWasmTruncateToInt64(const LAllocation& in)
    {
        setOperand(0, in);
    }

    MWasmTruncateToInt64* mir() const {
        return mir_->toWasmTruncateToInt64();
    }
};

class LInt64ToFloatingPointCall: public LCallInstructionHelper<1, INT64_PIECES, 0>
{
  public:
    LIR_HEADER(Int64ToFloatingPointCall);

    MInt64ToFloatingPoint* mir() const {
        return mir_->toInt64ToFloatingPoint();
    }
};

namespace details {

// Base class for the int64 and non-int64 variants.
template<size_t NumDefs>
class LWasmUnalignedLoadBase : public details::LWasmLoadBase<NumDefs, 4>
{
  public:
    typedef LWasmLoadBase<NumDefs, 4> Base;
    explicit LWasmUnalignedLoadBase(const LAllocation& ptr, const LDefinition& ptrCopy,
                                    const LDefinition& temp1, const LDefinition& temp2,
                                    const LDefinition& temp3)
      : Base(ptr)
    {
        Base::setTemp(0, ptrCopy);
        Base::setTemp(1, temp1);
        Base::setTemp(2, temp2);
        Base::setTemp(3, temp3);
    }

    const LDefinition* ptrCopy() {
        return Base::getTemp(0);
    }
};

} // namespace details

class LWasmUnalignedLoad : public details::LWasmUnalignedLoadBase<1>
{
  public:
    explicit LWasmUnalignedLoad(const LAllocation& ptr, const LDefinition& ptrCopy,
                                const LDefinition& temp1, const LDefinition& temp2,
                                const LDefinition& temp3)
      : LWasmUnalignedLoadBase(ptr, ptrCopy, temp1, temp2, temp3)
    {}
    LIR_HEADER(WasmUnalignedLoad);
};

class LWasmUnalignedLoadI64 : public details::LWasmUnalignedLoadBase<INT64_PIECES>
{
  public:
    explicit LWasmUnalignedLoadI64(const LAllocation& ptr, const LDefinition& ptrCopy,
                                   const LDefinition& temp1, const LDefinition& temp2,
                                   const LDefinition& temp3)
      : LWasmUnalignedLoadBase(ptr, ptrCopy, temp1, temp2, temp3)
    {}
    LIR_HEADER(WasmUnalignedLoadI64);
};

namespace details {

// Base class for the int64 and non-int64 variants.
template<size_t NumOps>
class LWasmUnalignedStoreBase : public LInstructionHelper<0, NumOps, 2>
{
  public:
    typedef LInstructionHelper<0, NumOps, 2> Base;

    static const uint32_t ValueIndex = 1;

    LWasmUnalignedStoreBase(const LAllocation& ptr, const LDefinition& ptrCopy,
                            const LDefinition& valueHelper)
    {
        Base::setOperand(0, ptr);
        Base::setTemp(0, ptrCopy);
        Base::setTemp(1, valueHelper);
    }
    MWasmStore* mir() const {
        return Base::mir_->toWasmStore();
    }
    const LDefinition* ptrCopy() {
        return Base::getTemp(0);
    }
    const LDefinition* valueHelper() {
        return Base::getTemp(1);
    }
};

} // namespace details

class LWasmUnalignedStore : public details::LWasmUnalignedStoreBase<2>
{
  public:
    LIR_HEADER(WasmUnalignedStore);
    LWasmUnalignedStore(const LAllocation& ptr, const LAllocation& value,
                        const LDefinition& ptrCopy, const LDefinition& valueHelper)
      : LWasmUnalignedStoreBase(ptr, ptrCopy, valueHelper)
    {
        setOperand(1, value);
    }
};

class LWasmUnalignedStoreI64 : public details::LWasmUnalignedStoreBase<1 + INT64_PIECES>
{
  public:
    LIR_HEADER(WasmUnalignedStoreI64);
    LWasmUnalignedStoreI64(const LAllocation& ptr, const LInt64Allocation& value,
                           const LDefinition& ptrCopy, const LDefinition& valueHelper)
      : LWasmUnalignedStoreBase(ptr, ptrCopy, valueHelper)
    {
        setInt64Operand(1, value);
    }
};

} // namespace jit
} // namespace js

#endif /* jit_arm_LIR_arm_h */