/
count_pair_amd64.s
1056 lines (990 loc) · 19.7 KB
/
count_pair_amd64.s
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
// Code generated by command: go run count_pair_asm.go -pkg mem -out ../mem/count_pair_amd64.s -stubs ../mem/count_pair_amd64.go. DO NOT EDIT.
//go:build !purego
#include "textflag.h"
// func countPair1(b []byte) int
// Requires: AVX, AVX2, CMOV, POPCNT
TEXT ·countPair1(SB), NOSPLIT, $0-32
MOVQ b_base+0(FP), AX
MOVQ b_len+8(FP), CX
XORQ DX, DX
SUBQ $0x01, CX
BTL $0x08, github·com∕segmentio∕asm∕cpu·X86+0(SB)
JCS avx2
tail:
CMPQ CX, $0x00
JLE done
generic:
MOVQ DX, BX
INCQ BX
MOVB (AX), SI
CMPB SI, 1(AX)
CMOVQEQ BX, DX
ADDQ $0x01, AX
SUBQ $0x01, CX
CMPQ CX, $0x00
JG generic
done:
MOVQ DX, ret+24(FP)
RET
avx2:
CMPQ CX, $0x00000101
JL avx2_tail128
XORQ BX, BX
XORQ SI, SI
XORQ DI, DI
XORQ R8, R8
XORQ R9, R9
XORQ R10, R10
XORQ R11, R11
XORQ R12, R12
avx2_loop256:
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VMOVDQU 128(AX), Y8
VMOVDQU 160(AX), Y10
VMOVDQU 192(AX), Y12
VMOVDQU 224(AX), Y14
VMOVDQU 1(AX), Y1
VMOVDQU 33(AX), Y3
VMOVDQU 65(AX), Y5
VMOVDQU 97(AX), Y7
VMOVDQU 129(AX), Y9
VMOVDQU 161(AX), Y11
VMOVDQU 193(AX), Y13
VMOVDQU 225(AX), Y15
VPCMPEQB Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQB Y2, Y3, Y3
VPMOVMSKB Y3, SI
VPCMPEQB Y4, Y5, Y5
VPMOVMSKB Y5, DI
VPCMPEQB Y6, Y7, Y7
VPMOVMSKB Y7, R8
VPCMPEQB Y8, Y9, Y9
VPMOVMSKB Y9, R9
VPCMPEQB Y10, Y11, Y11
VPMOVMSKB Y11, R10
VPCMPEQB Y12, Y13, Y13
VPMOVMSKB Y13, R11
VPCMPEQB Y14, Y15, Y15
VPMOVMSKB Y15, R12
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
POPCNTQ R9, R9
POPCNTQ R10, R10
POPCNTQ R11, R11
POPCNTQ R12, R12
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ R10, R9
ADDQ R12, R11
ADDQ R11, R9
ADDQ R9, BX
ADDQ BX, DX
ADDQ $0x00000100, AX
SUBQ $0x00000100, CX
CMPQ CX, $0x00000101
JGE avx2_loop256
avx2_tail128:
CMPQ CX, $0x81
JL avx2_tail64
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VMOVDQU 1(AX), Y1
VMOVDQU 33(AX), Y3
VMOVDQU 65(AX), Y5
VMOVDQU 97(AX), Y7
VPCMPEQB Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQB Y2, Y3, Y3
VPMOVMSKB Y3, SI
VPCMPEQB Y4, Y5, Y5
VPMOVMSKB Y5, DI
VPCMPEQB Y6, Y7, Y7
VPMOVMSKB Y7, R8
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ BX, DX
ADDQ $0x00000080, AX
SUBQ $0x00000080, CX
avx2_tail64:
CMPQ CX, $0x41
JL avx2_tail32
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 1(AX), Y1
VMOVDQU 33(AX), Y3
VPCMPEQB Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQB Y2, Y3, Y3
VPMOVMSKB Y3, SI
POPCNTQ BX, BX
POPCNTQ SI, SI
ADDQ SI, BX
ADDQ BX, DX
ADDQ $0x00000040, AX
SUBQ $0x00000040, CX
avx2_tail32:
CMPQ CX, $0x21
JL avx2_tail16
VMOVDQU (AX), Y0
VMOVDQU 1(AX), Y1
VPCMPEQB Y0, Y1, Y1
VPMOVMSKB Y1, BX
POPCNTQ BX, BX
ADDQ BX, DX
ADDQ $0x00000020, AX
SUBQ $0x00000020, CX
avx2_tail16:
CMPQ CX, $0x11
JL avx2_tail
VMOVDQU (AX), X0
VMOVDQU 1(AX), X1
VPCMPEQB X0, X1, X1
VPMOVMSKB X1, BX
POPCNTQ BX, BX
ADDQ BX, DX
ADDQ $0x10, AX
SUBQ $0x10, CX
avx2_tail:
VZEROUPPER
JMP tail
// func countPair2(b []byte) int
// Requires: AVX, AVX2, CMOV, POPCNT
TEXT ·countPair2(SB), NOSPLIT, $0-32
MOVQ b_base+0(FP), AX
MOVQ b_len+8(FP), CX
XORQ DX, DX
SUBQ $0x02, CX
BTL $0x08, github·com∕segmentio∕asm∕cpu·X86+0(SB)
JCS avx2
tail:
CMPQ CX, $0x00
JLE done
generic:
MOVQ DX, BX
INCQ BX
MOVW (AX), SI
CMPW SI, 2(AX)
CMOVQEQ BX, DX
ADDQ $0x02, AX
SUBQ $0x02, CX
CMPQ CX, $0x00
JG generic
done:
MOVQ DX, ret+24(FP)
RET
avx2:
CMPQ CX, $0x00000102
JL avx2_tail128
XORQ BX, BX
XORQ SI, SI
XORQ DI, DI
XORQ R8, R8
XORQ R9, R9
XORQ R10, R10
XORQ R11, R11
XORQ R12, R12
avx2_loop256:
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VMOVDQU 128(AX), Y8
VMOVDQU 160(AX), Y10
VMOVDQU 192(AX), Y12
VMOVDQU 224(AX), Y14
VMOVDQU 2(AX), Y1
VMOVDQU 34(AX), Y3
VMOVDQU 66(AX), Y5
VMOVDQU 98(AX), Y7
VMOVDQU 130(AX), Y9
VMOVDQU 162(AX), Y11
VMOVDQU 194(AX), Y13
VMOVDQU 226(AX), Y15
VPCMPEQW Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQW Y2, Y3, Y3
VPMOVMSKB Y3, SI
VPCMPEQW Y4, Y5, Y5
VPMOVMSKB Y5, DI
VPCMPEQW Y6, Y7, Y7
VPMOVMSKB Y7, R8
VPCMPEQW Y8, Y9, Y9
VPMOVMSKB Y9, R9
VPCMPEQW Y10, Y11, Y11
VPMOVMSKB Y11, R10
VPCMPEQW Y12, Y13, Y13
VPMOVMSKB Y13, R11
VPCMPEQW Y14, Y15, Y15
VPMOVMSKB Y15, R12
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
POPCNTQ R9, R9
POPCNTQ R10, R10
POPCNTQ R11, R11
POPCNTQ R12, R12
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ R10, R9
ADDQ R12, R11
ADDQ R11, R9
ADDQ R9, BX
ADDQ BX, DX
ADDQ $0x00000100, AX
SUBQ $0x00000100, CX
CMPQ CX, $0x00000102
JGE avx2_loop256
avx2_tail128:
CMPQ CX, $0x82
JL avx2_tail64
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VMOVDQU 2(AX), Y1
VMOVDQU 34(AX), Y3
VMOVDQU 66(AX), Y5
VMOVDQU 98(AX), Y7
VPCMPEQW Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQW Y2, Y3, Y3
VPMOVMSKB Y3, SI
VPCMPEQW Y4, Y5, Y5
VPMOVMSKB Y5, DI
VPCMPEQW Y6, Y7, Y7
VPMOVMSKB Y7, R8
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ BX, DX
ADDQ $0x00000080, AX
SUBQ $0x00000080, CX
avx2_tail64:
CMPQ CX, $0x42
JL avx2_tail32
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 2(AX), Y1
VMOVDQU 34(AX), Y3
VPCMPEQW Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQW Y2, Y3, Y3
VPMOVMSKB Y3, SI
POPCNTQ BX, BX
POPCNTQ SI, SI
ADDQ SI, BX
ADDQ BX, DX
ADDQ $0x00000040, AX
SUBQ $0x00000040, CX
avx2_tail32:
CMPQ CX, $0x22
JL avx2_tail16
VMOVDQU (AX), Y0
VMOVDQU 2(AX), Y1
VPCMPEQW Y0, Y1, Y1
VPMOVMSKB Y1, BX
POPCNTQ BX, BX
ADDQ BX, DX
ADDQ $0x00000020, AX
SUBQ $0x00000020, CX
avx2_tail16:
CMPQ CX, $0x12
JL avx2_tail
VMOVDQU (AX), X0
VMOVDQU 2(AX), X1
VPCMPEQW X0, X1, X1
VPMOVMSKB X1, BX
POPCNTQ BX, BX
ADDQ BX, DX
ADDQ $0x10, AX
SUBQ $0x10, CX
avx2_tail:
VZEROUPPER
SHRQ $0x01, DX
JMP tail
// func countPair4(b []byte) int
// Requires: AVX, AVX2, CMOV, POPCNT
TEXT ·countPair4(SB), NOSPLIT, $0-32
MOVQ b_base+0(FP), AX
MOVQ b_len+8(FP), CX
XORQ DX, DX
SUBQ $0x04, CX
BTL $0x08, github·com∕segmentio∕asm∕cpu·X86+0(SB)
JCS avx2
tail:
CMPQ CX, $0x00
JLE done
generic:
MOVQ DX, BX
INCQ BX
MOVL (AX), SI
CMPL SI, 4(AX)
CMOVQEQ BX, DX
ADDQ $0x04, AX
SUBQ $0x04, CX
CMPQ CX, $0x00
JG generic
done:
MOVQ DX, ret+24(FP)
RET
avx2:
CMPQ CX, $0x00000104
JL avx2_tail128
XORQ BX, BX
XORQ SI, SI
XORQ DI, DI
XORQ R8, R8
XORQ R9, R9
XORQ R10, R10
XORQ R11, R11
XORQ R12, R12
avx2_loop256:
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VMOVDQU 128(AX), Y8
VMOVDQU 160(AX), Y10
VMOVDQU 192(AX), Y12
VMOVDQU 224(AX), Y14
VMOVDQU 4(AX), Y1
VMOVDQU 36(AX), Y3
VMOVDQU 68(AX), Y5
VMOVDQU 100(AX), Y7
VMOVDQU 132(AX), Y9
VMOVDQU 164(AX), Y11
VMOVDQU 196(AX), Y13
VMOVDQU 228(AX), Y15
VPCMPEQD Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQD Y2, Y3, Y3
VPMOVMSKB Y3, SI
VPCMPEQD Y4, Y5, Y5
VPMOVMSKB Y5, DI
VPCMPEQD Y6, Y7, Y7
VPMOVMSKB Y7, R8
VPCMPEQD Y8, Y9, Y9
VPMOVMSKB Y9, R9
VPCMPEQD Y10, Y11, Y11
VPMOVMSKB Y11, R10
VPCMPEQD Y12, Y13, Y13
VPMOVMSKB Y13, R11
VPCMPEQD Y14, Y15, Y15
VPMOVMSKB Y15, R12
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
POPCNTQ R9, R9
POPCNTQ R10, R10
POPCNTQ R11, R11
POPCNTQ R12, R12
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ R10, R9
ADDQ R12, R11
ADDQ R11, R9
ADDQ R9, BX
ADDQ BX, DX
ADDQ $0x00000100, AX
SUBQ $0x00000100, CX
CMPQ CX, $0x00000104
JGE avx2_loop256
avx2_tail128:
CMPQ CX, $0x84
JL avx2_tail64
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VMOVDQU 4(AX), Y1
VMOVDQU 36(AX), Y3
VMOVDQU 68(AX), Y5
VMOVDQU 100(AX), Y7
VPCMPEQD Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQD Y2, Y3, Y3
VPMOVMSKB Y3, SI
VPCMPEQD Y4, Y5, Y5
VPMOVMSKB Y5, DI
VPCMPEQD Y6, Y7, Y7
VPMOVMSKB Y7, R8
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ BX, DX
ADDQ $0x00000080, AX
SUBQ $0x00000080, CX
avx2_tail64:
CMPQ CX, $0x44
JL avx2_tail32
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 4(AX), Y1
VMOVDQU 36(AX), Y3
VPCMPEQD Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQD Y2, Y3, Y3
VPMOVMSKB Y3, SI
POPCNTQ BX, BX
POPCNTQ SI, SI
ADDQ SI, BX
ADDQ BX, DX
ADDQ $0x00000040, AX
SUBQ $0x00000040, CX
avx2_tail32:
CMPQ CX, $0x24
JL avx2_tail16
VMOVDQU (AX), Y0
VMOVDQU 4(AX), Y1
VPCMPEQD Y0, Y1, Y1
VPMOVMSKB Y1, BX
POPCNTQ BX, BX
ADDQ BX, DX
ADDQ $0x00000020, AX
SUBQ $0x00000020, CX
avx2_tail16:
CMPQ CX, $0x14
JL avx2_tail
VMOVDQU (AX), X0
VMOVDQU 4(AX), X1
VPCMPEQD X0, X1, X1
VPMOVMSKB X1, BX
POPCNTQ BX, BX
ADDQ BX, DX
ADDQ $0x10, AX
SUBQ $0x10, CX
avx2_tail:
VZEROUPPER
SHRQ $0x02, DX
JMP tail
// func countPair8(b []byte) int
// Requires: AVX, AVX2, CMOV, POPCNT
TEXT ·countPair8(SB), NOSPLIT, $0-32
MOVQ b_base+0(FP), AX
MOVQ b_len+8(FP), CX
XORQ DX, DX
SUBQ $0x08, CX
BTL $0x08, github·com∕segmentio∕asm∕cpu·X86+0(SB)
JCS avx2
tail:
CMPQ CX, $0x00
JLE done
generic:
MOVQ DX, BX
INCQ BX
MOVQ (AX), SI
CMPQ SI, 8(AX)
CMOVQEQ BX, DX
ADDQ $0x08, AX
SUBQ $0x08, CX
CMPQ CX, $0x00
JG generic
done:
MOVQ DX, ret+24(FP)
RET
avx2:
CMPQ CX, $0x00000108
JL avx2_tail128
XORQ BX, BX
XORQ SI, SI
XORQ DI, DI
XORQ R8, R8
XORQ R9, R9
XORQ R10, R10
XORQ R11, R11
XORQ R12, R12
avx2_loop256:
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VMOVDQU 128(AX), Y8
VMOVDQU 160(AX), Y10
VMOVDQU 192(AX), Y12
VMOVDQU 224(AX), Y14
VMOVDQU 8(AX), Y1
VMOVDQU 40(AX), Y3
VMOVDQU 72(AX), Y5
VMOVDQU 104(AX), Y7
VMOVDQU 136(AX), Y9
VMOVDQU 168(AX), Y11
VMOVDQU 200(AX), Y13
VMOVDQU 232(AX), Y15
VPCMPEQQ Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQQ Y2, Y3, Y3
VPMOVMSKB Y3, SI
VPCMPEQQ Y4, Y5, Y5
VPMOVMSKB Y5, DI
VPCMPEQQ Y6, Y7, Y7
VPMOVMSKB Y7, R8
VPCMPEQQ Y8, Y9, Y9
VPMOVMSKB Y9, R9
VPCMPEQQ Y10, Y11, Y11
VPMOVMSKB Y11, R10
VPCMPEQQ Y12, Y13, Y13
VPMOVMSKB Y13, R11
VPCMPEQQ Y14, Y15, Y15
VPMOVMSKB Y15, R12
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
POPCNTQ R9, R9
POPCNTQ R10, R10
POPCNTQ R11, R11
POPCNTQ R12, R12
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ R10, R9
ADDQ R12, R11
ADDQ R11, R9
ADDQ R9, BX
ADDQ BX, DX
ADDQ $0x00000100, AX
SUBQ $0x00000100, CX
CMPQ CX, $0x00000108
JGE avx2_loop256
avx2_tail128:
CMPQ CX, $0x88
JL avx2_tail64
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VMOVDQU 8(AX), Y1
VMOVDQU 40(AX), Y3
VMOVDQU 72(AX), Y5
VMOVDQU 104(AX), Y7
VPCMPEQQ Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQQ Y2, Y3, Y3
VPMOVMSKB Y3, SI
VPCMPEQQ Y4, Y5, Y5
VPMOVMSKB Y5, DI
VPCMPEQQ Y6, Y7, Y7
VPMOVMSKB Y7, R8
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ BX, DX
ADDQ $0x00000080, AX
SUBQ $0x00000080, CX
avx2_tail64:
CMPQ CX, $0x48
JL avx2_tail32
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 8(AX), Y1
VMOVDQU 40(AX), Y3
VPCMPEQQ Y0, Y1, Y1
VPMOVMSKB Y1, BX
VPCMPEQQ Y2, Y3, Y3
VPMOVMSKB Y3, SI
POPCNTQ BX, BX
POPCNTQ SI, SI
ADDQ SI, BX
ADDQ BX, DX
ADDQ $0x00000040, AX
SUBQ $0x00000040, CX
avx2_tail32:
CMPQ CX, $0x28
JL avx2_tail16
VMOVDQU (AX), Y0
VMOVDQU 8(AX), Y1
VPCMPEQQ Y0, Y1, Y1
VPMOVMSKB Y1, BX
POPCNTQ BX, BX
ADDQ BX, DX
ADDQ $0x00000020, AX
SUBQ $0x00000020, CX
avx2_tail16:
CMPQ CX, $0x18
JL avx2_tail
VMOVDQU (AX), X0
VMOVDQU 8(AX), X1
VPCMPEQQ X0, X1, X1
VPMOVMSKB X1, BX
POPCNTQ BX, BX
ADDQ BX, DX
ADDQ $0x10, AX
SUBQ $0x10, CX
avx2_tail:
VZEROUPPER
SHRQ $0x03, DX
JMP tail
// func countPair16(b []byte) int
// Requires: AVX, AVX2, CMOV, POPCNT, SSE2, SSE4.1
TEXT ·countPair16(SB), NOSPLIT, $0-32
MOVQ b_base+0(FP), AX
MOVQ b_len+8(FP), CX
XORQ DX, DX
SUBQ $0x10, CX
BTL $0x08, github·com∕segmentio∕asm∕cpu·X86+0(SB)
JCS avx2
tail:
CMPQ CX, $0x00
JLE done
generic:
MOVQ DX, BX
INCQ BX
MOVOU (AX), X0
MOVOU 16(AX), X1
PCMPEQQ X0, X1
PMOVMSKB X1, SI
CMPL SI, $0x0000ffff
CMOVQEQ BX, DX
ADDQ $0x10, AX
SUBQ $0x10, CX
CMPQ CX, $0x00
JG generic
done:
MOVQ DX, ret+24(FP)
RET
avx2:
CMPQ CX, $0x00000110
JL avx2_tail128
XORQ BX, BX
XORQ SI, SI
XORQ DI, DI
XORQ R8, R8
XORQ R9, R9
XORQ R10, R10
XORQ R11, R11
XORQ R12, R12
avx2_loop256:
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VMOVDQU 128(AX), Y8
VMOVDQU 160(AX), Y10
VMOVDQU 192(AX), Y12
VMOVDQU 224(AX), Y14
VPERM2I128 $0x21, Y2, Y0, Y1
VPERM2I128 $0x21, Y4, Y2, Y3
VPERM2I128 $0x21, Y6, Y4, Y5
VPERM2I128 $0x21, Y8, Y6, Y7
VPERM2I128 $0x21, Y10, Y8, Y9
VPERM2I128 $0x21, Y12, Y10, Y11
VPERM2I128 $0x21, Y14, Y12, Y13
VMOVDQU 240(AX), Y15
VPCMPEQQ Y0, Y1, Y1
VPERMQ $0xb1, Y1, Y0
VPAND Y1, Y0, Y0
VPMOVMSKB Y0, BX
VPCMPEQQ Y2, Y3, Y3
VPERMQ $0xb1, Y3, Y2
VPAND Y3, Y2, Y2
VPMOVMSKB Y2, SI
VPCMPEQQ Y4, Y5, Y5
VPERMQ $0xb1, Y5, Y4
VPAND Y5, Y4, Y4
VPMOVMSKB Y4, DI
VPCMPEQQ Y6, Y7, Y7
VPERMQ $0xb1, Y7, Y6
VPAND Y7, Y6, Y6
VPMOVMSKB Y6, R8
VPCMPEQQ Y8, Y9, Y9
VPERMQ $0xb1, Y9, Y8
VPAND Y9, Y8, Y8
VPMOVMSKB Y8, R9
VPCMPEQQ Y10, Y11, Y11
VPERMQ $0xb1, Y11, Y10
VPAND Y11, Y10, Y10
VPMOVMSKB Y10, R10
VPCMPEQQ Y12, Y13, Y13
VPERMQ $0xb1, Y13, Y12
VPAND Y13, Y12, Y12
VPMOVMSKB Y12, R11
VPCMPEQQ Y14, Y15, Y15
VPERMQ $0xb1, Y15, Y14
VPAND Y15, Y14, Y14
VPMOVMSKB Y14, R12
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
POPCNTQ R9, R9
POPCNTQ R10, R10
POPCNTQ R11, R11
POPCNTQ R12, R12
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ R10, R9
ADDQ R12, R11
ADDQ R11, R9
ADDQ R9, BX
ADDQ BX, DX
ADDQ $0x00000100, AX
SUBQ $0x00000100, CX
CMPQ CX, $0x00000110
JGE avx2_loop256
avx2_tail128:
CMPQ CX, $0x90
JL avx2_tail64
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y6
VPERM2I128 $0x21, Y2, Y0, Y1
VPERM2I128 $0x21, Y4, Y2, Y3
VPERM2I128 $0x21, Y6, Y4, Y5
VMOVDQU 112(AX), Y7
VPCMPEQQ Y0, Y1, Y1
VPERMQ $0xb1, Y1, Y0
VPAND Y1, Y0, Y0
VPMOVMSKB Y0, BX
VPCMPEQQ Y2, Y3, Y3
VPERMQ $0xb1, Y3, Y2
VPAND Y3, Y2, Y2
VPMOVMSKB Y2, SI
VPCMPEQQ Y4, Y5, Y5
VPERMQ $0xb1, Y5, Y4
VPAND Y5, Y4, Y4
VPMOVMSKB Y4, DI
VPCMPEQQ Y6, Y7, Y7
VPERMQ $0xb1, Y7, Y6
VPAND Y7, Y6, Y6
VPMOVMSKB Y6, R8
POPCNTQ BX, BX
POPCNTQ SI, SI
POPCNTQ DI, DI
POPCNTQ R8, R8
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ BX, DX
ADDQ $0x00000080, AX
SUBQ $0x00000080, CX
avx2_tail64:
CMPQ CX, $0x50
JL avx2_tail32
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VPERM2I128 $0x21, Y2, Y0, Y1
VMOVDQU 48(AX), Y3
VPCMPEQQ Y0, Y1, Y1
VPERMQ $0xb1, Y1, Y0
VPAND Y1, Y0, Y0
VPMOVMSKB Y0, BX
VPCMPEQQ Y2, Y3, Y3
VPERMQ $0xb1, Y3, Y2
VPAND Y3, Y2, Y2
VPMOVMSKB Y2, SI
POPCNTQ BX, BX
POPCNTQ SI, SI
ADDQ SI, BX
ADDQ BX, DX
ADDQ $0x00000040, AX
SUBQ $0x00000040, CX
avx2_tail32:
CMPQ CX, $0x30
JL avx2_tail16
VMOVDQU (AX), Y0
VMOVDQU 16(AX), Y1
VPCMPEQQ Y0, Y1, Y1
VPERMQ $0xb1, Y1, Y0
VPAND Y1, Y0, Y0
VPMOVMSKB Y0, BX
POPCNTQ BX, BX
ADDQ BX, DX
ADDQ $0x00000020, AX
SUBQ $0x00000020, CX
avx2_tail16:
VZEROUPPER
SHRQ $0x04, DX
JMP tail
// func countPair32(b []byte) int
// Requires: AVX, AVX2, CMOV, POPCNT, SSE2, SSE4.1
TEXT ·countPair32(SB), NOSPLIT, $0-32
MOVQ b_base+0(FP), AX
MOVQ b_len+8(FP), CX
XORQ DX, DX
SUBQ $0x20, CX
BTL $0x08, github·com∕segmentio∕asm∕cpu·X86+0(SB)
JCS avx2
tail:
CMPQ CX, $0x00
JLE done
generic:
MOVQ DX, BX
INCQ BX
MOVOU (AX), X0
MOVOU 16(AX), X1
MOVOU 32(AX), X2
MOVOU 48(AX), X3
PCMPEQQ X0, X2
PCMPEQQ X1, X3
PMOVMSKB X2, SI
PMOVMSKB X3, DI
ANDL DI, SI
CMPL SI, $0x0000ffff
CMOVQEQ BX, DX
ADDQ $0x20, AX
SUBQ $0x20, CX
CMPQ CX, $0x00
JG generic
done:
MOVQ DX, ret+24(FP)
RET
avx2:
CMPQ CX, $0x00000120
JL avx2_tail128
XORQ BX, BX
XORQ SI, SI
XORQ DI, DI
XORQ R8, R8
XORQ R9, R9
XORQ R10, R10
XORQ R11, R11
XORQ R12, R12
avx2_loop256:
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y5
VMOVDQU 128(AX), Y7
VMOVDQU 160(AX), Y8
VMOVDQU 192(AX), Y9
VMOVDQU 224(AX), Y10
VMOVDQU 256(AX), Y11
VPCMPEQQ Y0, Y2, Y1
VPMOVMSKB Y1, BX
VPCMPEQQ Y2, Y4, Y3
VPMOVMSKB Y3, SI
VPCMPEQQ Y4, Y5, Y0
VPMOVMSKB Y0, DI
VPCMPEQQ Y5, Y7, Y6
VPMOVMSKB Y6, R8
VPCMPEQQ Y7, Y8, Y0
VPMOVMSKB Y0, R9
VPCMPEQQ Y8, Y9, Y0
VPMOVMSKB Y0, R10
VPCMPEQQ Y9, Y10, Y0
VPMOVMSKB Y0, R11
VPCMPEQQ Y10, Y11, Y11
VPMOVMSKB Y11, R12
POPCNTQ BX, BX
SHRQ $0x05, BX
POPCNTQ SI, SI
SHRQ $0x05, SI
POPCNTQ DI, DI
SHRQ $0x05, DI
POPCNTQ R8, R8
SHRQ $0x05, R8
POPCNTQ R9, R9
SHRQ $0x05, R9
POPCNTQ R10, R10
SHRQ $0x05, R10
POPCNTQ R11, R11
SHRQ $0x05, R11
POPCNTQ R12, R12
SHRQ $0x05, R12
ADDQ SI, BX
ADDQ R8, DI
ADDQ DI, BX
ADDQ R10, R9
ADDQ R12, R11
ADDQ R11, R9
ADDQ R9, BX
ADDQ BX, DX
ADDQ $0x00000100, AX
SUBQ $0x00000100, CX
CMPQ CX, $0x00000120
JGE avx2_loop256
avx2_tail128:
CMPQ CX, $0xa0
JL avx2_tail64
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y2
VMOVDQU 64(AX), Y4
VMOVDQU 96(AX), Y5
VMOVDQU 128(AX), Y6
VPCMPEQQ Y0, Y2, Y1
VPMOVMSKB Y1, BX