-
Notifications
You must be signed in to change notification settings - Fork 339
/
Copy pathgeneric_ops-inl.h
8165 lines (6992 loc) · 300 KB
/
generic_ops-inl.h
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
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// Copyright 2021 Google LLC
// Copyright 2023,2024 Arm Limited and/or
// its affiliates <[email protected]>
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: BSD-3-Clause
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Target-independent types/functions defined after target-specific ops.
// The "include guards" in this file that check HWY_TARGET_TOGGLE serve to skip
// the generic implementation here if native ops are already defined.
#include "hwy/base.h"
// Define detail::Shuffle1230 etc, but only when viewing the current header;
// normally this is included via highway.h, which includes ops/*.h.
#if HWY_IDE && !defined(HWY_HIGHWAY_INCLUDED)
#include "hwy/detect_targets.h"
#include "hwy/ops/emu128-inl.h"
#endif // HWY_IDE
// Relies on the external include guard in highway.h.
HWY_BEFORE_NAMESPACE();
namespace hwy {
namespace HWY_NAMESPACE {
// The lane type of a vector type, e.g. float for Vec<ScalableTag<float>>.
template <class V>
using LaneType = decltype(GetLane(V()));
// Vector type, e.g. Vec128<float> for CappedTag<float, 4>. Useful as the return
// type of functions that do not take a vector argument, or as an argument type
// if the function only has a template argument for D, or for explicit type
// names instead of auto. This may be a built-in type.
template <class D>
using Vec = decltype(Zero(D()));
// Mask type. Useful as the return type of functions that do not take a mask
// argument, or as an argument type if the function only has a template argument
// for D, or for explicit type names instead of auto.
template <class D>
using Mask = decltype(MaskFromVec(Zero(D())));
// Returns the closest value to v within [lo, hi].
template <class V>
HWY_API V Clamp(const V v, const V lo, const V hi) {
return Min(Max(lo, v), hi);
}
// CombineShiftRightBytes (and -Lanes) are not available for the scalar target,
// and RVV has its own implementation of -Lanes.
#if (HWY_TARGET != HWY_SCALAR && HWY_TARGET != HWY_RVV) || HWY_IDE
template <size_t kLanes, class D>
HWY_API VFromD<D> CombineShiftRightLanes(D d, VFromD<D> hi, VFromD<D> lo) {
constexpr size_t kBytes = kLanes * sizeof(TFromD<D>);
static_assert(kBytes < 16, "Shift count is per-block");
return CombineShiftRightBytes<kBytes>(d, hi, lo);
}
#endif
// Returns lanes with the most significant bit set and all other bits zero.
template <class D>
HWY_API Vec<D> SignBit(D d) {
const RebindToUnsigned<decltype(d)> du;
return BitCast(d, Set(du, SignMask<TFromD<D>>()));
}
// Returns quiet NaN.
template <class D>
HWY_API Vec<D> NaN(D d) {
const RebindToSigned<D> di;
// LimitsMax sets all exponent and mantissa bits to 1. The exponent plus
// mantissa MSB (to indicate quiet) would be sufficient.
return BitCast(d, Set(di, LimitsMax<TFromD<decltype(di)>>()));
}
// Returns positive infinity.
template <class D>
HWY_API Vec<D> Inf(D d) {
const RebindToUnsigned<D> du;
using T = TFromD<D>;
using TU = TFromD<decltype(du)>;
const TU max_x2 = static_cast<TU>(MaxExponentTimes2<T>());
return BitCast(d, Set(du, max_x2 >> 1));
}
// ------------------------------ MaskedSetOr/MaskedSet
template <class V, typename T = TFromV<V>, typename D = DFromV<V>,
typename M = MFromD<D>>
HWY_API V MaskedSetOr(V no, M m, T a) {
D d;
return IfThenElse(m, Set(d, a), no);
}
template <class D, typename V = VFromD<D>, typename M = MFromD<D>,
typename T = TFromD<D>>
HWY_API V MaskedSet(D d, M m, T a) {
return IfThenElseZero(m, Set(d, a));
}
// ------------------------------ ZeroExtendResizeBitCast
// The implementation of detail::ZeroExtendResizeBitCast for the HWY_EMU128
// target is in emu128-inl.h, and the implementation of
// detail::ZeroExtendResizeBitCast for the HWY_SCALAR target is in scalar-inl.h
#if HWY_TARGET != HWY_EMU128 && HWY_TARGET != HWY_SCALAR
namespace detail {
#if HWY_HAVE_SCALABLE
template <size_t kFromVectSize, size_t kToVectSize, class DTo, class DFrom>
HWY_INLINE VFromD<DTo> ZeroExtendResizeBitCast(
hwy::SizeTag<kFromVectSize> /* from_size_tag */,
hwy::SizeTag<kToVectSize> /* to_size_tag */, DTo d_to, DFrom d_from,
VFromD<DFrom> v) {
const Repartition<uint8_t, DTo> d_to_u8;
const auto resized = ResizeBitCast(d_to_u8, v);
// Zero the upper bytes which were not present/valid in d_from.
const size_t num_bytes = Lanes(Repartition<uint8_t, decltype(d_from)>());
return BitCast(d_to, IfThenElseZero(FirstN(d_to_u8, num_bytes), resized));
}
#else // target that uses fixed-size vectors
// Truncating or same-size resizing cast: same as ResizeBitCast
template <size_t kFromVectSize, size_t kToVectSize, class DTo, class DFrom,
HWY_IF_LANES_LE(kToVectSize, kFromVectSize)>
HWY_INLINE VFromD<DTo> ZeroExtendResizeBitCast(
hwy::SizeTag<kFromVectSize> /* from_size_tag */,
hwy::SizeTag<kToVectSize> /* to_size_tag */, DTo d_to, DFrom /*d_from*/,
VFromD<DFrom> v) {
return ResizeBitCast(d_to, v);
}
// Resizing cast to vector that has twice the number of lanes of the source
// vector
template <size_t kFromVectSize, size_t kToVectSize, class DTo, class DFrom,
HWY_IF_LANES(kToVectSize, kFromVectSize * 2)>
HWY_INLINE VFromD<DTo> ZeroExtendResizeBitCast(
hwy::SizeTag<kFromVectSize> /* from_size_tag */,
hwy::SizeTag<kToVectSize> /* to_size_tag */, DTo d_to, DFrom d_from,
VFromD<DFrom> v) {
const Twice<decltype(d_from)> dt_from;
return BitCast(d_to, ZeroExtendVector(dt_from, v));
}
// Resizing cast to vector that has more than twice the number of lanes of the
// source vector
template <size_t kFromVectSize, size_t kToVectSize, class DTo, class DFrom,
HWY_IF_LANES_GT(kToVectSize, kFromVectSize * 2)>
HWY_INLINE VFromD<DTo> ZeroExtendResizeBitCast(
hwy::SizeTag<kFromVectSize> /* from_size_tag */,
hwy::SizeTag<kToVectSize> /* to_size_tag */, DTo d_to, DFrom /*d_from*/,
VFromD<DFrom> v) {
using TFrom = TFromD<DFrom>;
constexpr size_t kNumOfFromLanes = kFromVectSize / sizeof(TFrom);
const Repartition<TFrom, decltype(d_to)> d_resize_to;
return BitCast(d_to, IfThenElseZero(FirstN(d_resize_to, kNumOfFromLanes),
ResizeBitCast(d_resize_to, v)));
}
#endif // HWY_HAVE_SCALABLE
} // namespace detail
#endif // HWY_TARGET != HWY_EMU128 && HWY_TARGET != HWY_SCALAR
template <class DTo, class DFrom>
HWY_API VFromD<DTo> ZeroExtendResizeBitCast(DTo d_to, DFrom d_from,
VFromD<DFrom> v) {
return detail::ZeroExtendResizeBitCast(hwy::SizeTag<d_from.MaxBytes()>(),
hwy::SizeTag<d_to.MaxBytes()>(), d_to,
d_from, v);
}
// ------------------------------ SafeFillN
template <class D, typename T = TFromD<D>>
HWY_API void SafeFillN(const size_t num, const T value, D d,
T* HWY_RESTRICT to) {
#if HWY_MEM_OPS_MIGHT_FAULT
(void)d;
for (size_t i = 0; i < num; ++i) {
to[i] = value;
}
#else
BlendedStore(Set(d, value), FirstN(d, num), d, to);
#endif
}
// ------------------------------ SafeCopyN
template <class D, typename T = TFromD<D>>
HWY_API void SafeCopyN(const size_t num, D d, const T* HWY_RESTRICT from,
T* HWY_RESTRICT to) {
#if HWY_MEM_OPS_MIGHT_FAULT
(void)d;
for (size_t i = 0; i < num; ++i) {
to[i] = from[i];
}
#else
const Mask<D> mask = FirstN(d, num);
BlendedStore(MaskedLoad(mask, d, from), mask, d, to);
#endif
}
// ------------------------------ IsNegative
#if (defined(HWY_NATIVE_IS_NEGATIVE) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_IS_NEGATIVE
#undef HWY_NATIVE_IS_NEGATIVE
#else
#define HWY_NATIVE_IS_NEGATIVE
#endif
template <class V, HWY_IF_NOT_UNSIGNED_V(V)>
HWY_API Mask<DFromV<V>> IsNegative(V v) {
const DFromV<decltype(v)> d;
const RebindToSigned<decltype(d)> di;
return RebindMask(d, MaskFromVec(BroadcastSignBit(BitCast(di, v))));
}
#endif // HWY_NATIVE_IS_NEGATIVE
// ------------------------------ MaskFalse
#if (defined(HWY_NATIVE_MASK_FALSE) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_MASK_FALSE
#undef HWY_NATIVE_MASK_FALSE
#else
#define HWY_NATIVE_MASK_FALSE
#endif
template <class D>
HWY_API Mask<D> MaskFalse(D d) {
return MaskFromVec(Zero(d));
}
#endif // HWY_NATIVE_MASK_FALSE
// ------------------------------ IfNegativeThenElseZero
#if (defined(HWY_NATIVE_IF_NEG_THEN_ELSE_ZERO) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_IF_NEG_THEN_ELSE_ZERO
#undef HWY_NATIVE_IF_NEG_THEN_ELSE_ZERO
#else
#define HWY_NATIVE_IF_NEG_THEN_ELSE_ZERO
#endif
template <class V, HWY_IF_NOT_UNSIGNED_V(V)>
HWY_API V IfNegativeThenElseZero(V v, V yes) {
return IfThenElseZero(IsNegative(v), yes);
}
#endif // HWY_NATIVE_IF_NEG_THEN_ELSE_ZERO
// ------------------------------ IfNegativeThenZeroElse
#if (defined(HWY_NATIVE_IF_NEG_THEN_ZERO_ELSE) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_IF_NEG_THEN_ZERO_ELSE
#undef HWY_NATIVE_IF_NEG_THEN_ZERO_ELSE
#else
#define HWY_NATIVE_IF_NEG_THEN_ZERO_ELSE
#endif
template <class V, HWY_IF_NOT_UNSIGNED_V(V)>
HWY_API V IfNegativeThenZeroElse(V v, V no) {
return IfThenZeroElse(IsNegative(v), no);
}
#endif // HWY_NATIVE_IF_NEG_THEN_ZERO_ELSE
// ------------------------------ ZeroIfNegative (IfNegativeThenZeroElse)
// ZeroIfNegative is generic for all vector lengths
template <class V, HWY_IF_NOT_UNSIGNED_V(V)>
HWY_API V ZeroIfNegative(V v) {
return IfNegativeThenZeroElse(v, v);
}
// ------------------------------ BitwiseIfThenElse
#if (defined(HWY_NATIVE_BITWISE_IF_THEN_ELSE) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_BITWISE_IF_THEN_ELSE
#undef HWY_NATIVE_BITWISE_IF_THEN_ELSE
#else
#define HWY_NATIVE_BITWISE_IF_THEN_ELSE
#endif
template <class V>
HWY_API V BitwiseIfThenElse(V mask, V yes, V no) {
return Or(And(mask, yes), AndNot(mask, no));
}
#endif // HWY_NATIVE_BITWISE_IF_THEN_ELSE
// ------------------------------ PromoteMaskTo
#if (defined(HWY_NATIVE_PROMOTE_MASK_TO) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_PROMOTE_MASK_TO
#undef HWY_NATIVE_PROMOTE_MASK_TO
#else
#define HWY_NATIVE_PROMOTE_MASK_TO
#endif
template <class DTo, class DFrom>
HWY_API Mask<DTo> PromoteMaskTo(DTo d_to, DFrom d_from, Mask<DFrom> m) {
static_assert(
sizeof(TFromD<DTo>) > sizeof(TFromD<DFrom>),
"sizeof(TFromD<DTo>) must be greater than sizeof(TFromD<DFrom>)");
static_assert(
IsSame<Mask<DFrom>, Mask<Rebind<TFromD<DFrom>, DTo>>>(),
"Mask<DFrom> must be the same type as Mask<Rebind<TFromD<DFrom>, DTo>>");
const RebindToSigned<decltype(d_to)> di_to;
const RebindToSigned<decltype(d_from)> di_from;
return MaskFromVec(BitCast(
d_to, PromoteTo(di_to, BitCast(di_from, VecFromMask(d_from, m)))));
}
#endif // HWY_NATIVE_PROMOTE_MASK_TO
// ------------------------------ DemoteMaskTo
#if (defined(HWY_NATIVE_DEMOTE_MASK_TO) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_DEMOTE_MASK_TO
#undef HWY_NATIVE_DEMOTE_MASK_TO
#else
#define HWY_NATIVE_DEMOTE_MASK_TO
#endif
template <class DTo, class DFrom>
HWY_API Mask<DTo> DemoteMaskTo(DTo d_to, DFrom d_from, Mask<DFrom> m) {
static_assert(sizeof(TFromD<DTo>) < sizeof(TFromD<DFrom>),
"sizeof(TFromD<DTo>) must be less than sizeof(TFromD<DFrom>)");
static_assert(
IsSame<Mask<DFrom>, Mask<Rebind<TFromD<DFrom>, DTo>>>(),
"Mask<DFrom> must be the same type as Mask<Rebind<TFromD<DFrom>, DTo>>");
const RebindToSigned<decltype(d_to)> di_to;
const RebindToSigned<decltype(d_from)> di_from;
return MaskFromVec(
BitCast(d_to, DemoteTo(di_to, BitCast(di_from, VecFromMask(d_from, m)))));
}
#endif // HWY_NATIVE_DEMOTE_MASK_TO
// ------------------------------ InsertIntoUpper
#if (defined(HWY_NATIVE_LOAD_HIGHER) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_LOAD_HIGHER
#undef HWY_NATIVE_LOAD_HIGHER
#else
#define HWY_NATIVE_LOAD_HIGHER
#endif
template <class D, typename T, class V = VFromD<D>(), HWY_IF_LANES_GT_D(D, 1),
HWY_IF_POW2_GT_D(D, -3)>
HWY_API V InsertIntoUpper(D d, T* p, V a) {
Half<D> dh;
const VFromD<decltype(dh)> b = LoadU(dh, p);
return Combine(d, b, LowerHalf(a));
}
#endif // HWY_NATIVE_LOAD_HIGHER
// ------------------------------ CombineMasks
#if (defined(HWY_NATIVE_COMBINE_MASKS) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_COMBINE_MASKS
#undef HWY_NATIVE_COMBINE_MASKS
#else
#define HWY_NATIVE_COMBINE_MASKS
#endif
#if HWY_TARGET != HWY_SCALAR || HWY_IDE
template <class D>
HWY_API Mask<D> CombineMasks(D d, Mask<Half<D>> hi, Mask<Half<D>> lo) {
const Half<decltype(d)> dh;
return MaskFromVec(Combine(d, VecFromMask(dh, hi), VecFromMask(dh, lo)));
}
#endif
#endif // HWY_NATIVE_COMBINE_MASKS
// ------------------------------ LowerHalfOfMask
#if (defined(HWY_NATIVE_LOWER_HALF_OF_MASK) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_LOWER_HALF_OF_MASK
#undef HWY_NATIVE_LOWER_HALF_OF_MASK
#else
#define HWY_NATIVE_LOWER_HALF_OF_MASK
#endif
template <class D>
HWY_API Mask<D> LowerHalfOfMask(D d, Mask<Twice<D>> m) {
const Twice<decltype(d)> dt;
return MaskFromVec(LowerHalf(d, VecFromMask(dt, m)));
}
#endif // HWY_NATIVE_LOWER_HALF_OF_MASK
// ------------------------------ UpperHalfOfMask
#if (defined(HWY_NATIVE_UPPER_HALF_OF_MASK) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_UPPER_HALF_OF_MASK
#undef HWY_NATIVE_UPPER_HALF_OF_MASK
#else
#define HWY_NATIVE_UPPER_HALF_OF_MASK
#endif
#if HWY_TARGET != HWY_SCALAR || HWY_IDE
template <class D>
HWY_API Mask<D> UpperHalfOfMask(D d, Mask<Twice<D>> m) {
const Twice<decltype(d)> dt;
return MaskFromVec(UpperHalf(d, VecFromMask(dt, m)));
}
#endif
#endif // HWY_NATIVE_UPPER_HALF_OF_MASK
// ------------------------------ OrderedDemote2MasksTo
#if (defined(HWY_NATIVE_ORDERED_DEMOTE_2_MASKS_TO) == \
defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_ORDERED_DEMOTE_2_MASKS_TO
#undef HWY_NATIVE_ORDERED_DEMOTE_2_MASKS_TO
#else
#define HWY_NATIVE_ORDERED_DEMOTE_2_MASKS_TO
#endif
#if HWY_TARGET != HWY_SCALAR || HWY_IDE
template <class DTo, class DFrom>
HWY_API Mask<DTo> OrderedDemote2MasksTo(DTo d_to, DFrom d_from, Mask<DFrom> a,
Mask<DFrom> b) {
static_assert(
sizeof(TFromD<DTo>) == sizeof(TFromD<DFrom>) / 2,
"sizeof(TFromD<DTo>) must be equal to sizeof(TFromD<DFrom>) / 2");
static_assert(IsSame<Mask<DTo>, Mask<Repartition<TFromD<DTo>, DFrom>>>(),
"Mask<DTo> must be the same type as "
"Mask<Repartition<TFromD<DTo>, DFrom>>>()");
const RebindToSigned<decltype(d_from)> di_from;
const RebindToSigned<decltype(d_to)> di_to;
const auto va = BitCast(di_from, VecFromMask(d_from, a));
const auto vb = BitCast(di_from, VecFromMask(d_from, b));
return MaskFromVec(BitCast(d_to, OrderedDemote2To(di_to, va, vb)));
}
#endif
#endif // HWY_NATIVE_ORDERED_DEMOTE_2_MASKS_TO
// ------------------------------ RotateLeft
template <int kBits, class V, HWY_IF_NOT_FLOAT_NOR_SPECIAL_V(V)>
HWY_API V RotateLeft(V v) {
constexpr size_t kSizeInBits = sizeof(TFromV<V>) * 8;
static_assert(0 <= kBits && kBits < kSizeInBits, "Invalid shift count");
constexpr int kRotateRightAmt =
(kBits == 0) ? 0 : static_cast<int>(kSizeInBits) - kBits;
return RotateRight<kRotateRightAmt>(v);
}
// ------------------------------ InterleaveWholeLower/InterleaveWholeUpper
#if (defined(HWY_NATIVE_INTERLEAVE_WHOLE) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_INTERLEAVE_WHOLE
#undef HWY_NATIVE_INTERLEAVE_WHOLE
#else
#define HWY_NATIVE_INTERLEAVE_WHOLE
#endif
#if HWY_TARGET != HWY_SCALAR || HWY_IDE
template <class D, HWY_IF_V_SIZE_LE_D(D, 16)>
HWY_API VFromD<D> InterleaveWholeLower(D d, VFromD<D> a, VFromD<D> b) {
// InterleaveWholeLower(d, a, b) is equivalent to InterleaveLower(a, b) if
// D().MaxBytes() <= 16 is true
return InterleaveLower(d, a, b);
}
template <class D, HWY_IF_V_SIZE_LE_D(D, 16)>
HWY_API VFromD<D> InterleaveWholeUpper(D d, VFromD<D> a, VFromD<D> b) {
// InterleaveWholeUpper(d, a, b) is equivalent to InterleaveUpper(a, b) if
// D().MaxBytes() <= 16 is true
return InterleaveUpper(d, a, b);
}
// InterleaveWholeLower/InterleaveWholeUpper for 32-byte vectors on AVX2/AVX3
// is implemented in x86_256-inl.h.
// InterleaveWholeLower/InterleaveWholeUpper for 64-byte vectors on AVX3 is
// implemented in x86_512-inl.h.
// InterleaveWholeLower/InterleaveWholeUpper for 32-byte vectors on WASM_EMU256
// is implemented in wasm_256-inl.h.
#endif // HWY_TARGET != HWY_SCALAR
#endif // HWY_NATIVE_INTERLEAVE_WHOLE
#if HWY_TARGET != HWY_SCALAR || HWY_IDE
// The InterleaveWholeLower without the optional D parameter is generic for all
// vector lengths.
template <class V>
HWY_API V InterleaveWholeLower(V a, V b) {
return InterleaveWholeLower(DFromV<V>(), a, b);
}
#endif // HWY_TARGET != HWY_SCALAR
// ------------------------------ InterleaveEven
#if HWY_TARGET != HWY_SCALAR || HWY_IDE
// InterleaveEven without the optional D parameter is generic for all vector
// lengths
template <class V>
HWY_API V InterleaveEven(V a, V b) {
return InterleaveEven(DFromV<V>(), a, b);
}
#endif
// ------------------------------ MinMagnitude/MaxMagnitude
#if (defined(HWY_NATIVE_FLOAT_MIN_MAX_MAGNITUDE) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_FLOAT_MIN_MAX_MAGNITUDE
#undef HWY_NATIVE_FLOAT_MIN_MAX_MAGNITUDE
#else
#define HWY_NATIVE_FLOAT_MIN_MAX_MAGNITUDE
#endif
template <class V, HWY_IF_FLOAT_OR_SPECIAL_V(V)>
HWY_API V MinMagnitude(V a, V b) {
const V abs_a = Abs(a);
const V abs_b = Abs(b);
const V min = Min(IfThenElse(Eq(abs_a, abs_b), a, b), b);
return IfThenElse(Lt(abs_a, abs_b), a, min);
}
template <class V, HWY_IF_FLOAT_OR_SPECIAL_V(V)>
HWY_API V MaxMagnitude(V a, V b) {
const V abs_a = Abs(a);
const V abs_b = Abs(b);
// This lvalue appears to be necessary to avoid a clang bug on SVE.
const V max = Max(IfThenElse(Eq(abs_a, abs_b), b, a), a);
return IfThenElse(Lt(abs_a, abs_b), b, max);
}
#endif // HWY_NATIVE_FLOAT_MIN_MAX_MAGNITUDE
template <class V, HWY_IF_SIGNED_V(V)>
HWY_API V MinMagnitude(V a, V b) {
const DFromV<V> d;
const RebindToUnsigned<decltype(d)> du;
const auto abs_a = BitCast(du, Abs(a));
const auto abs_b = BitCast(du, Abs(b));
return IfThenElse(RebindMask(d, Lt(abs_a, abs_b)), a,
Min(IfThenElse(RebindMask(d, Eq(abs_a, abs_b)), a, b), b));
}
template <class V, HWY_IF_SIGNED_V(V)>
HWY_API V MaxMagnitude(V a, V b) {
const DFromV<V> d;
const RebindToUnsigned<decltype(d)> du;
const auto abs_a = BitCast(du, Abs(a));
const auto abs_b = BitCast(du, Abs(b));
return IfThenElse(RebindMask(d, Lt(abs_a, abs_b)), b,
Max(IfThenElse(RebindMask(d, Eq(abs_a, abs_b)), b, a), a));
}
template <class V, HWY_IF_UNSIGNED_V(V)>
HWY_API V MinMagnitude(V a, V b) {
return Min(a, b);
}
template <class V, HWY_IF_UNSIGNED_V(V)>
HWY_API V MaxMagnitude(V a, V b) {
return Max(a, b);
}
// ------------------------------ AddSub
template <class V, HWY_IF_LANES_D(DFromV<V>, 1)>
HWY_API V AddSub(V a, V b) {
// AddSub(a, b) for a one-lane vector is equivalent to Sub(a, b)
return Sub(a, b);
}
// AddSub for F32x2, F32x4, and F64x2 vectors is implemented in x86_128-inl.h on
// SSSE3/SSE4/AVX2/AVX3
// AddSub for F32x8 and F64x4 vectors is implemented in x86_256-inl.h on
// AVX2/AVX3
// AddSub for F16/F32/F64 vectors on SVE is implemented in arm_sve-inl.h
// AddSub for integer vectors on SVE2 is implemented in arm_sve-inl.h
template <class V, HWY_IF_ADDSUB_V(V)>
HWY_API V AddSub(V a, V b) {
using D = DFromV<decltype(a)>;
using T = TFromD<D>;
using TNegate = If<!hwy::IsSigned<T>(), MakeSigned<T>, T>;
const D d;
const Rebind<TNegate, D> d_negate;
// Negate the even lanes of b
const auto negated_even_b = OddEven(b, BitCast(d, Neg(BitCast(d_negate, b))));
return Add(a, negated_even_b);
}
// ------------------------------ MaskedAddOr etc.
#if (defined(HWY_NATIVE_MASKED_ARITH) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_MASKED_ARITH
#undef HWY_NATIVE_MASKED_ARITH
#else
#define HWY_NATIVE_MASKED_ARITH
#endif
template <class V, class M>
HWY_API V MaskedMinOr(V no, M m, V a, V b) {
return IfThenElse(m, Min(a, b), no);
}
template <class V, class M>
HWY_API V MaskedMaxOr(V no, M m, V a, V b) {
return IfThenElse(m, Max(a, b), no);
}
template <class V, class M>
HWY_API V MaskedAddOr(V no, M m, V a, V b) {
return IfThenElse(m, Add(a, b), no);
}
template <class V, class M>
HWY_API V MaskedSubOr(V no, M m, V a, V b) {
return IfThenElse(m, Sub(a, b), no);
}
template <class V, class M>
HWY_API V MaskedMulOr(V no, M m, V a, V b) {
return IfThenElse(m, Mul(a, b), no);
}
template <class V, class M>
HWY_API V MaskedDivOr(V no, M m, V a, V b) {
return IfThenElse(m, Div(a, b), no);
}
template <class V, class M>
HWY_API V MaskedModOr(V no, M m, V a, V b) {
return IfThenElse(m, Mod(a, b), no);
}
template <class V, class M>
HWY_API V MaskedSatAddOr(V no, M m, V a, V b) {
return IfThenElse(m, SaturatedAdd(a, b), no);
}
template <class V, class M>
HWY_API V MaskedSatSubOr(V no, M m, V a, V b) {
return IfThenElse(m, SaturatedSub(a, b), no);
}
#endif // HWY_NATIVE_MASKED_ARITH
#if (defined(HWY_NATIVE_ZERO_MASKED_ARITH) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_ZERO_MASKED_ARITH
#undef HWY_NATIVE_ZERO_MASKED_ARITH
#else
#define HWY_NATIVE_ZERO_MASKED_ARITH
#endif
template <class V, class M>
HWY_API V MaskedMax(M m, V a, V b) {
return IfThenElseZero(m, (Max(a, b)));
}
template <class V, class M>
HWY_API V MaskedAdd(M m, V a, V b) {
return IfThenElseZero(m, Add(a, b));
}
template <class V, class M>
HWY_API V MaskedSub(M m, V a, V b) {
return IfThenElseZero(m, Sub(a, b));
}
template <class V, class M>
HWY_API V MaskedMul(M m, V a, V b) {
return IfThenElseZero(m, Mul(a, b));
}
template <class V, class M>
HWY_API V MaskedDiv(M m, V a, V b) {
return IfThenElseZero(m, Div(a, b));
}
template <class V, class M>
HWY_API V MaskedSaturatedAdd(M m, V a, V b) {
return IfThenElseZero(m, SaturatedAdd(a, b));
}
template <class V, class M>
HWY_API V MaskedSaturatedSub(M m, V a, V b) {
return IfThenElseZero(m, SaturatedSub(a, b));
}
template <class V, class M, typename D = DFromV<V>, HWY_IF_I16_D(D)>
HWY_API V MaskedMulFixedPoint15(M m, V a, V b) {
return IfThenElseZero(m, MulFixedPoint15(a, b));
}
template <class V, class M>
HWY_API V MaskedMulAdd(M m, V mul, V x, V add) {
return IfThenElseZero(m, MulAdd(mul, x, add));
}
template <class V, class M>
HWY_API V MaskedNegMulAdd(M m, V mul, V x, V add) {
return IfThenElseZero(m, NegMulAdd(mul, x, add));
}
template <class D, class M, HWY_IF_UI32_D(D),
class V16 = VFromD<RepartitionToNarrow<D>>>
HWY_API VFromD<D> MaskedWidenMulPairwiseAdd(D d32, M m, V16 a, V16 b) {
return IfThenElseZero(m, WidenMulPairwiseAdd(d32, a, b));
}
template <class DF, class M, HWY_IF_F32_D(DF), class VBF>
HWY_API VFromD<DF> MaskedWidenMulPairwiseAdd(DF df, M m, VBF a, VBF b) {
return IfThenElseZero(m, WidenMulPairwiseAdd(df, a, b));
}
#endif // HWY_NATIVE_ZERO_MASKED_ARITH
// ------------------------------ MaskedShift
template <int kShift, class V, class M>
HWY_API V MaskedShiftLeft(M m, V a) {
return IfThenElseZero(m, ShiftLeft<kShift>(a));
}
template <int kShift, class V, class M>
HWY_API V MaskedShiftRight(M m, V a) {
return IfThenElseZero(m, ShiftRight<kShift>(a));
}
template <int kShift, class V, class M>
HWY_API V MaskedShiftRightOr(V no, M m, V a) {
return IfThenElse(m, ShiftRight<kShift>(a), no);
}
template <class V, class M>
HWY_API V MaskedShrOr(V no, M m, V a, V shifts) {
return IfThenElse(m, Shr(a, shifts), no);
}
// ------------------------------ MaskedEq etc.
#if (defined(HWY_NATIVE_MASKED_COMP) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_MASKED_COMP
#undef HWY_NATIVE_MASKED_COMP
#else
#define HWY_NATIVE_MASKED_COMP
#endif
template <class V, class M>
HWY_API auto MaskedEq(M m, V a, V b) -> decltype(a == b) {
return And(m, Eq(a, b));
}
template <class V, class M>
HWY_API auto MaskedNe(M m, V a, V b) -> decltype(a == b) {
return And(m, Ne(a, b));
}
template <class V, class M>
HWY_API auto MaskedLt(M m, V a, V b) -> decltype(a == b) {
return And(m, Lt(a, b));
}
template <class V, class M>
HWY_API auto MaskedGt(M m, V a, V b) -> decltype(a == b) {
return And(m, Gt(a, b));
}
template <class V, class M>
HWY_API auto MaskedLe(M m, V a, V b) -> decltype(a == b) {
return And(m, Le(a, b));
}
template <class V, class M>
HWY_API auto MaskedGe(M m, V a, V b) -> decltype(a == b) {
return And(m, Ge(a, b));
}
template <class V, class M, class D = DFromV<V>>
HWY_API MFromD<D> MaskedIsNaN(const M m, const V v) {
return And(m, IsNaN(v));
}
#endif // HWY_NATIVE_MASKED_COMP
// ------------------------------ IfNegativeThenNegOrUndefIfZero
#if (defined(HWY_NATIVE_INTEGER_IF_NEGATIVE_THEN_NEG) == \
defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_INTEGER_IF_NEGATIVE_THEN_NEG
#undef HWY_NATIVE_INTEGER_IF_NEGATIVE_THEN_NEG
#else
#define HWY_NATIVE_INTEGER_IF_NEGATIVE_THEN_NEG
#endif
template <class V, HWY_IF_NOT_FLOAT_NOR_SPECIAL_V(V)>
HWY_API V IfNegativeThenNegOrUndefIfZero(V mask, V v) {
#if HWY_HAVE_SCALABLE || HWY_TARGET_IS_SVE
// MaskedSubOr is more efficient than IfNegativeThenElse on RVV/SVE
const auto zero = Zero(DFromV<V>());
return MaskedSubOr(v, Lt(mask, zero), zero, v);
#else
return IfNegativeThenElse(mask, Neg(v), v);
#endif
}
#endif // HWY_NATIVE_INTEGER_IF_NEGATIVE_THEN_NEG
template <class V, HWY_IF_FLOAT_V(V)>
HWY_API V IfNegativeThenNegOrUndefIfZero(V mask, V v) {
return CopySign(v, Xor(mask, v));
}
// ------------------------------ SaturatedNeg
#if (defined(HWY_NATIVE_SATURATED_NEG_8_16_32) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_SATURATED_NEG_8_16_32
#undef HWY_NATIVE_SATURATED_NEG_8_16_32
#else
#define HWY_NATIVE_SATURATED_NEG_8_16_32
#endif
template <class V, HWY_IF_T_SIZE_ONE_OF_V(V, (1 << 1) | (1 << 2)),
HWY_IF_SIGNED_V(V)>
HWY_API V SaturatedNeg(V v) {
const DFromV<decltype(v)> d;
return SaturatedSub(Zero(d), v);
}
template <class V, HWY_IF_I32(TFromV<V>)>
HWY_API V SaturatedNeg(V v) {
const DFromV<decltype(v)> d;
#if HWY_TARGET == HWY_RVV || HWY_TARGET_IS_PPC || HWY_TARGET_IS_SVE || \
HWY_TARGET_IS_NEON
// RVV/PPC/SVE/NEON have native I32 SaturatedSub instructions
return SaturatedSub(Zero(d), v);
#else
// ~v[i] - ((v[i] > LimitsMin<int32_t>()) ? -1 : 0) is equivalent to
// (v[i] > LimitsMin<int32_t>) ? (-v[i]) : LimitsMax<int32_t>() since
// -v[i] == ~v[i] + 1 == ~v[i] - (-1) and
// ~LimitsMin<int32_t>() == LimitsMax<int32_t>().
return Sub(Not(v), VecFromMask(d, Gt(v, Set(d, LimitsMin<int32_t>()))));
#endif
}
#endif // HWY_NATIVE_SATURATED_NEG_8_16_32
#if (defined(HWY_NATIVE_SATURATED_NEG_64) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_SATURATED_NEG_64
#undef HWY_NATIVE_SATURATED_NEG_64
#else
#define HWY_NATIVE_SATURATED_NEG_64
#endif
template <class V, HWY_IF_I64(TFromV<V>)>
HWY_API V SaturatedNeg(V v) {
#if HWY_TARGET == HWY_RVV || HWY_TARGET_IS_SVE || HWY_TARGET_IS_NEON
// RVV/SVE/NEON have native I64 SaturatedSub instructions
const DFromV<decltype(v)> d;
return SaturatedSub(Zero(d), v);
#else
const auto neg_v = Neg(v);
return Add(neg_v, BroadcastSignBit(And(v, neg_v)));
#endif
}
#endif // HWY_NATIVE_SATURATED_NEG_64
// ------------------------------ SaturatedAbs
#if (defined(HWY_NATIVE_SATURATED_ABS) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_SATURATED_ABS
#undef HWY_NATIVE_SATURATED_ABS
#else
#define HWY_NATIVE_SATURATED_ABS
#endif
template <class V, HWY_IF_SIGNED_V(V)>
HWY_API V SaturatedAbs(V v) {
return Max(v, SaturatedNeg(v));
}
#endif
// ------------------------------ MaskedAbsOr
template <class V, HWY_IF_SIGNED_V(V), class M>
HWY_API V MaskedAbsOr(V no, M m, V v) {
return IfThenElse(m, Abs(v), no);
}
// ------------------------------ MaskedAbs
template <class V, HWY_IF_SIGNED_V(V), class M>
HWY_API V MaskedAbs(M m, V v) {
return IfThenElseZero(m, Abs(v));
}
// ------------------------------ Reductions
// Targets follow one of two strategies. If HWY_NATIVE_REDUCE_SCALAR is toggled,
// they (RVV/SVE/Armv8/Emu128) implement ReduceSum and SumOfLanes via Set.
// Otherwise, they (Armv7/PPC/scalar/WASM/x86) define zero to most of the
// SumOfLanes overloads. For the latter group, we here define the remaining
// overloads, plus ReduceSum which uses them plus GetLane.
#if (defined(HWY_NATIVE_REDUCE_SCALAR) == defined(HWY_TARGET_TOGGLE))
#ifdef HWY_NATIVE_REDUCE_SCALAR
#undef HWY_NATIVE_REDUCE_SCALAR
#else
#define HWY_NATIVE_REDUCE_SCALAR
#endif
namespace detail {
// Allows reusing the same shuffle code for SumOfLanes/MinOfLanes/MaxOfLanes.
struct AddFunc {
template <class V>
V operator()(V a, V b) const {
return Add(a, b);
}
};
struct MinFunc {
template <class V>
V operator()(V a, V b) const {
return Min(a, b);
}
};
struct MaxFunc {
template <class V>
V operator()(V a, V b) const {
return Max(a, b);
}
};
// No-op for vectors of at most one block.
template <class D, class Func, HWY_IF_V_SIZE_LE_D(D, 16)>
HWY_INLINE VFromD<D> ReduceAcrossBlocks(D, Func, VFromD<D> v) {
return v;
}
// Reduces a lane with its counterpart in other block(s). Shared by AVX2 and
// WASM_EMU256. AVX3 has its own overload.
template <class D, class Func, HWY_IF_V_SIZE_D(D, 32)>
HWY_INLINE VFromD<D> ReduceAcrossBlocks(D /*d*/, Func f, VFromD<D> v) {
return f(v, SwapAdjacentBlocks(v));
}
// These return the reduction result broadcasted across all lanes. They assume
// the caller has already reduced across blocks.
template <class D, class Func, HWY_IF_LANES_PER_BLOCK_D(D, 2)>
HWY_INLINE VFromD<D> ReduceWithinBlocks(D d, Func f, VFromD<D> v10) {
return f(v10, Reverse2(d, v10));
}
template <class D, class Func, HWY_IF_LANES_PER_BLOCK_D(D, 4)>
HWY_INLINE VFromD<D> ReduceWithinBlocks(D d, Func f, VFromD<D> v3210) {
const VFromD<D> v0123 = Reverse4(d, v3210);
const VFromD<D> v03_12_12_03 = f(v3210, v0123);
const VFromD<D> v12_03_03_12 = Reverse2(d, v03_12_12_03);
return f(v03_12_12_03, v12_03_03_12);
}
template <class D, class Func, HWY_IF_LANES_PER_BLOCK_D(D, 8)>
HWY_INLINE VFromD<D> ReduceWithinBlocks(D d, Func f, VFromD<D> v76543210) {
// The upper half is reversed from the lower half; omit for brevity.
const VFromD<D> v34_25_16_07 = f(v76543210, Reverse8(d, v76543210));
const VFromD<D> v0347_1625_1625_0347 =
f(v34_25_16_07, Reverse4(d, v34_25_16_07));
return f(v0347_1625_1625_0347, Reverse2(d, v0347_1625_1625_0347));
}
template <class D, class Func, HWY_IF_LANES_PER_BLOCK_D(D, 16), HWY_IF_U8_D(D)>
HWY_INLINE VFromD<D> ReduceWithinBlocks(D d, Func f, VFromD<D> v) {
const RepartitionToWide<decltype(d)> dw;
using VW = VFromD<decltype(dw)>;
const VW vw = BitCast(dw, v);
// f is commutative, so no need to adapt for HWY_IS_LITTLE_ENDIAN.
const VW even = And(vw, Set(dw, 0xFF));
const VW odd = ShiftRight<8>(vw);
const VW reduced = ReduceWithinBlocks(dw, f, f(even, odd));
#if HWY_IS_LITTLE_ENDIAN
return DupEven(BitCast(d, reduced));
#else
return DupOdd(BitCast(d, reduced));
#endif
}