forked from facebook/rocksdb
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathcrc32c.cc
1231 lines (1181 loc) · 43 KB
/
crc32c.cc
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 (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
//
// A portable implementation of crc32c, optimized to handle
// four bytes at a time.
#include "util/crc32c.h"
#include <stdint.h>
#ifdef HAVE_SSE42
#include <nmmintrin.h>
#include <wmmintrin.h>
#endif
#include "util/coding.h"
#include "util/util.h"
#ifdef __powerpc64__
#include "util/crc32c_ppc.h"
#include "util/crc32c_ppc_constants.h"
#if __linux__
#include <sys/auxv.h>
#ifndef PPC_FEATURE2_VEC_CRYPTO
#define PPC_FEATURE2_VEC_CRYPTO 0x02000000
#endif
#ifndef AT_HWCAP2
#define AT_HWCAP2 26
#endif
#endif /* __linux__ */
#endif
namespace rocksdb {
namespace crc32c {
#if defined(HAVE_POWER8) && defined(HAS_ALTIVEC)
#ifdef __powerpc64__
static int arch_ppc_crc32 = 0;
#endif /* __powerpc64__ */
#endif
static const uint32_t table0_[256] = {
0x00000000, 0xf26b8303, 0xe13b70f7, 0x1350f3f4,
0xc79a971f, 0x35f1141c, 0x26a1e7e8, 0xd4ca64eb,
0x8ad958cf, 0x78b2dbcc, 0x6be22838, 0x9989ab3b,
0x4d43cfd0, 0xbf284cd3, 0xac78bf27, 0x5e133c24,
0x105ec76f, 0xe235446c, 0xf165b798, 0x030e349b,
0xd7c45070, 0x25afd373, 0x36ff2087, 0xc494a384,
0x9a879fa0, 0x68ec1ca3, 0x7bbcef57, 0x89d76c54,
0x5d1d08bf, 0xaf768bbc, 0xbc267848, 0x4e4dfb4b,
0x20bd8ede, 0xd2d60ddd, 0xc186fe29, 0x33ed7d2a,
0xe72719c1, 0x154c9ac2, 0x061c6936, 0xf477ea35,
0xaa64d611, 0x580f5512, 0x4b5fa6e6, 0xb93425e5,
0x6dfe410e, 0x9f95c20d, 0x8cc531f9, 0x7eaeb2fa,
0x30e349b1, 0xc288cab2, 0xd1d83946, 0x23b3ba45,
0xf779deae, 0x05125dad, 0x1642ae59, 0xe4292d5a,
0xba3a117e, 0x4851927d, 0x5b016189, 0xa96ae28a,
0x7da08661, 0x8fcb0562, 0x9c9bf696, 0x6ef07595,
0x417b1dbc, 0xb3109ebf, 0xa0406d4b, 0x522bee48,
0x86e18aa3, 0x748a09a0, 0x67dafa54, 0x95b17957,
0xcba24573, 0x39c9c670, 0x2a993584, 0xd8f2b687,
0x0c38d26c, 0xfe53516f, 0xed03a29b, 0x1f682198,
0x5125dad3, 0xa34e59d0, 0xb01eaa24, 0x42752927,
0x96bf4dcc, 0x64d4cecf, 0x77843d3b, 0x85efbe38,
0xdbfc821c, 0x2997011f, 0x3ac7f2eb, 0xc8ac71e8,
0x1c661503, 0xee0d9600, 0xfd5d65f4, 0x0f36e6f7,
0x61c69362, 0x93ad1061, 0x80fde395, 0x72966096,
0xa65c047d, 0x5437877e, 0x4767748a, 0xb50cf789,
0xeb1fcbad, 0x197448ae, 0x0a24bb5a, 0xf84f3859,
0x2c855cb2, 0xdeeedfb1, 0xcdbe2c45, 0x3fd5af46,
0x7198540d, 0x83f3d70e, 0x90a324fa, 0x62c8a7f9,
0xb602c312, 0x44694011, 0x5739b3e5, 0xa55230e6,
0xfb410cc2, 0x092a8fc1, 0x1a7a7c35, 0xe811ff36,
0x3cdb9bdd, 0xceb018de, 0xdde0eb2a, 0x2f8b6829,
0x82f63b78, 0x709db87b, 0x63cd4b8f, 0x91a6c88c,
0x456cac67, 0xb7072f64, 0xa457dc90, 0x563c5f93,
0x082f63b7, 0xfa44e0b4, 0xe9141340, 0x1b7f9043,
0xcfb5f4a8, 0x3dde77ab, 0x2e8e845f, 0xdce5075c,
0x92a8fc17, 0x60c37f14, 0x73938ce0, 0x81f80fe3,
0x55326b08, 0xa759e80b, 0xb4091bff, 0x466298fc,
0x1871a4d8, 0xea1a27db, 0xf94ad42f, 0x0b21572c,
0xdfeb33c7, 0x2d80b0c4, 0x3ed04330, 0xccbbc033,
0xa24bb5a6, 0x502036a5, 0x4370c551, 0xb11b4652,
0x65d122b9, 0x97baa1ba, 0x84ea524e, 0x7681d14d,
0x2892ed69, 0xdaf96e6a, 0xc9a99d9e, 0x3bc21e9d,
0xef087a76, 0x1d63f975, 0x0e330a81, 0xfc588982,
0xb21572c9, 0x407ef1ca, 0x532e023e, 0xa145813d,
0x758fe5d6, 0x87e466d5, 0x94b49521, 0x66df1622,
0x38cc2a06, 0xcaa7a905, 0xd9f75af1, 0x2b9cd9f2,
0xff56bd19, 0x0d3d3e1a, 0x1e6dcdee, 0xec064eed,
0xc38d26c4, 0x31e6a5c7, 0x22b65633, 0xd0ddd530,
0x0417b1db, 0xf67c32d8, 0xe52cc12c, 0x1747422f,
0x49547e0b, 0xbb3ffd08, 0xa86f0efc, 0x5a048dff,
0x8ecee914, 0x7ca56a17, 0x6ff599e3, 0x9d9e1ae0,
0xd3d3e1ab, 0x21b862a8, 0x32e8915c, 0xc083125f,
0x144976b4, 0xe622f5b7, 0xf5720643, 0x07198540,
0x590ab964, 0xab613a67, 0xb831c993, 0x4a5a4a90,
0x9e902e7b, 0x6cfbad78, 0x7fab5e8c, 0x8dc0dd8f,
0xe330a81a, 0x115b2b19, 0x020bd8ed, 0xf0605bee,
0x24aa3f05, 0xd6c1bc06, 0xc5914ff2, 0x37faccf1,
0x69e9f0d5, 0x9b8273d6, 0x88d28022, 0x7ab90321,
0xae7367ca, 0x5c18e4c9, 0x4f48173d, 0xbd23943e,
0xf36e6f75, 0x0105ec76, 0x12551f82, 0xe03e9c81,
0x34f4f86a, 0xc69f7b69, 0xd5cf889d, 0x27a40b9e,
0x79b737ba, 0x8bdcb4b9, 0x988c474d, 0x6ae7c44e,
0xbe2da0a5, 0x4c4623a6, 0x5f16d052, 0xad7d5351
};
static const uint32_t table1_[256] = {
0x00000000, 0x13a29877, 0x274530ee, 0x34e7a899,
0x4e8a61dc, 0x5d28f9ab, 0x69cf5132, 0x7a6dc945,
0x9d14c3b8, 0x8eb65bcf, 0xba51f356, 0xa9f36b21,
0xd39ea264, 0xc03c3a13, 0xf4db928a, 0xe7790afd,
0x3fc5f181, 0x2c6769f6, 0x1880c16f, 0x0b225918,
0x714f905d, 0x62ed082a, 0x560aa0b3, 0x45a838c4,
0xa2d13239, 0xb173aa4e, 0x859402d7, 0x96369aa0,
0xec5b53e5, 0xfff9cb92, 0xcb1e630b, 0xd8bcfb7c,
0x7f8be302, 0x6c297b75, 0x58ced3ec, 0x4b6c4b9b,
0x310182de, 0x22a31aa9, 0x1644b230, 0x05e62a47,
0xe29f20ba, 0xf13db8cd, 0xc5da1054, 0xd6788823,
0xac154166, 0xbfb7d911, 0x8b507188, 0x98f2e9ff,
0x404e1283, 0x53ec8af4, 0x670b226d, 0x74a9ba1a,
0x0ec4735f, 0x1d66eb28, 0x298143b1, 0x3a23dbc6,
0xdd5ad13b, 0xcef8494c, 0xfa1fe1d5, 0xe9bd79a2,
0x93d0b0e7, 0x80722890, 0xb4958009, 0xa737187e,
0xff17c604, 0xecb55e73, 0xd852f6ea, 0xcbf06e9d,
0xb19da7d8, 0xa23f3faf, 0x96d89736, 0x857a0f41,
0x620305bc, 0x71a19dcb, 0x45463552, 0x56e4ad25,
0x2c896460, 0x3f2bfc17, 0x0bcc548e, 0x186eccf9,
0xc0d23785, 0xd370aff2, 0xe797076b, 0xf4359f1c,
0x8e585659, 0x9dface2e, 0xa91d66b7, 0xbabffec0,
0x5dc6f43d, 0x4e646c4a, 0x7a83c4d3, 0x69215ca4,
0x134c95e1, 0x00ee0d96, 0x3409a50f, 0x27ab3d78,
0x809c2506, 0x933ebd71, 0xa7d915e8, 0xb47b8d9f,
0xce1644da, 0xddb4dcad, 0xe9537434, 0xfaf1ec43,
0x1d88e6be, 0x0e2a7ec9, 0x3acdd650, 0x296f4e27,
0x53028762, 0x40a01f15, 0x7447b78c, 0x67e52ffb,
0xbf59d487, 0xacfb4cf0, 0x981ce469, 0x8bbe7c1e,
0xf1d3b55b, 0xe2712d2c, 0xd69685b5, 0xc5341dc2,
0x224d173f, 0x31ef8f48, 0x050827d1, 0x16aabfa6,
0x6cc776e3, 0x7f65ee94, 0x4b82460d, 0x5820de7a,
0xfbc3faf9, 0xe861628e, 0xdc86ca17, 0xcf245260,
0xb5499b25, 0xa6eb0352, 0x920cabcb, 0x81ae33bc,
0x66d73941, 0x7575a136, 0x419209af, 0x523091d8,
0x285d589d, 0x3bffc0ea, 0x0f186873, 0x1cbaf004,
0xc4060b78, 0xd7a4930f, 0xe3433b96, 0xf0e1a3e1,
0x8a8c6aa4, 0x992ef2d3, 0xadc95a4a, 0xbe6bc23d,
0x5912c8c0, 0x4ab050b7, 0x7e57f82e, 0x6df56059,
0x1798a91c, 0x043a316b, 0x30dd99f2, 0x237f0185,
0x844819fb, 0x97ea818c, 0xa30d2915, 0xb0afb162,
0xcac27827, 0xd960e050, 0xed8748c9, 0xfe25d0be,
0x195cda43, 0x0afe4234, 0x3e19eaad, 0x2dbb72da,
0x57d6bb9f, 0x447423e8, 0x70938b71, 0x63311306,
0xbb8de87a, 0xa82f700d, 0x9cc8d894, 0x8f6a40e3,
0xf50789a6, 0xe6a511d1, 0xd242b948, 0xc1e0213f,
0x26992bc2, 0x353bb3b5, 0x01dc1b2c, 0x127e835b,
0x68134a1e, 0x7bb1d269, 0x4f567af0, 0x5cf4e287,
0x04d43cfd, 0x1776a48a, 0x23910c13, 0x30339464,
0x4a5e5d21, 0x59fcc556, 0x6d1b6dcf, 0x7eb9f5b8,
0x99c0ff45, 0x8a626732, 0xbe85cfab, 0xad2757dc,
0xd74a9e99, 0xc4e806ee, 0xf00fae77, 0xe3ad3600,
0x3b11cd7c, 0x28b3550b, 0x1c54fd92, 0x0ff665e5,
0x759baca0, 0x663934d7, 0x52de9c4e, 0x417c0439,
0xa6050ec4, 0xb5a796b3, 0x81403e2a, 0x92e2a65d,
0xe88f6f18, 0xfb2df76f, 0xcfca5ff6, 0xdc68c781,
0x7b5fdfff, 0x68fd4788, 0x5c1aef11, 0x4fb87766,
0x35d5be23, 0x26772654, 0x12908ecd, 0x013216ba,
0xe64b1c47, 0xf5e98430, 0xc10e2ca9, 0xd2acb4de,
0xa8c17d9b, 0xbb63e5ec, 0x8f844d75, 0x9c26d502,
0x449a2e7e, 0x5738b609, 0x63df1e90, 0x707d86e7,
0x0a104fa2, 0x19b2d7d5, 0x2d557f4c, 0x3ef7e73b,
0xd98eedc6, 0xca2c75b1, 0xfecbdd28, 0xed69455f,
0x97048c1a, 0x84a6146d, 0xb041bcf4, 0xa3e32483
};
static const uint32_t table2_[256] = {
0x00000000, 0xa541927e, 0x4f6f520d, 0xea2ec073,
0x9edea41a, 0x3b9f3664, 0xd1b1f617, 0x74f06469,
0x38513ec5, 0x9d10acbb, 0x773e6cc8, 0xd27ffeb6,
0xa68f9adf, 0x03ce08a1, 0xe9e0c8d2, 0x4ca15aac,
0x70a27d8a, 0xd5e3eff4, 0x3fcd2f87, 0x9a8cbdf9,
0xee7cd990, 0x4b3d4bee, 0xa1138b9d, 0x045219e3,
0x48f3434f, 0xedb2d131, 0x079c1142, 0xa2dd833c,
0xd62de755, 0x736c752b, 0x9942b558, 0x3c032726,
0xe144fb14, 0x4405696a, 0xae2ba919, 0x0b6a3b67,
0x7f9a5f0e, 0xdadbcd70, 0x30f50d03, 0x95b49f7d,
0xd915c5d1, 0x7c5457af, 0x967a97dc, 0x333b05a2,
0x47cb61cb, 0xe28af3b5, 0x08a433c6, 0xade5a1b8,
0x91e6869e, 0x34a714e0, 0xde89d493, 0x7bc846ed,
0x0f382284, 0xaa79b0fa, 0x40577089, 0xe516e2f7,
0xa9b7b85b, 0x0cf62a25, 0xe6d8ea56, 0x43997828,
0x37691c41, 0x92288e3f, 0x78064e4c, 0xdd47dc32,
0xc76580d9, 0x622412a7, 0x880ad2d4, 0x2d4b40aa,
0x59bb24c3, 0xfcfab6bd, 0x16d476ce, 0xb395e4b0,
0xff34be1c, 0x5a752c62, 0xb05bec11, 0x151a7e6f,
0x61ea1a06, 0xc4ab8878, 0x2e85480b, 0x8bc4da75,
0xb7c7fd53, 0x12866f2d, 0xf8a8af5e, 0x5de93d20,
0x29195949, 0x8c58cb37, 0x66760b44, 0xc337993a,
0x8f96c396, 0x2ad751e8, 0xc0f9919b, 0x65b803e5,
0x1148678c, 0xb409f5f2, 0x5e273581, 0xfb66a7ff,
0x26217bcd, 0x8360e9b3, 0x694e29c0, 0xcc0fbbbe,
0xb8ffdfd7, 0x1dbe4da9, 0xf7908dda, 0x52d11fa4,
0x1e704508, 0xbb31d776, 0x511f1705, 0xf45e857b,
0x80aee112, 0x25ef736c, 0xcfc1b31f, 0x6a802161,
0x56830647, 0xf3c29439, 0x19ec544a, 0xbcadc634,
0xc85da25d, 0x6d1c3023, 0x8732f050, 0x2273622e,
0x6ed23882, 0xcb93aafc, 0x21bd6a8f, 0x84fcf8f1,
0xf00c9c98, 0x554d0ee6, 0xbf63ce95, 0x1a225ceb,
0x8b277743, 0x2e66e53d, 0xc448254e, 0x6109b730,
0x15f9d359, 0xb0b84127, 0x5a968154, 0xffd7132a,
0xb3764986, 0x1637dbf8, 0xfc191b8b, 0x595889f5,
0x2da8ed9c, 0x88e97fe2, 0x62c7bf91, 0xc7862def,
0xfb850ac9, 0x5ec498b7, 0xb4ea58c4, 0x11abcaba,
0x655baed3, 0xc01a3cad, 0x2a34fcde, 0x8f756ea0,
0xc3d4340c, 0x6695a672, 0x8cbb6601, 0x29faf47f,
0x5d0a9016, 0xf84b0268, 0x1265c21b, 0xb7245065,
0x6a638c57, 0xcf221e29, 0x250cde5a, 0x804d4c24,
0xf4bd284d, 0x51fcba33, 0xbbd27a40, 0x1e93e83e,
0x5232b292, 0xf77320ec, 0x1d5de09f, 0xb81c72e1,
0xccec1688, 0x69ad84f6, 0x83834485, 0x26c2d6fb,
0x1ac1f1dd, 0xbf8063a3, 0x55aea3d0, 0xf0ef31ae,
0x841f55c7, 0x215ec7b9, 0xcb7007ca, 0x6e3195b4,
0x2290cf18, 0x87d15d66, 0x6dff9d15, 0xc8be0f6b,
0xbc4e6b02, 0x190ff97c, 0xf321390f, 0x5660ab71,
0x4c42f79a, 0xe90365e4, 0x032da597, 0xa66c37e9,
0xd29c5380, 0x77ddc1fe, 0x9df3018d, 0x38b293f3,
0x7413c95f, 0xd1525b21, 0x3b7c9b52, 0x9e3d092c,
0xeacd6d45, 0x4f8cff3b, 0xa5a23f48, 0x00e3ad36,
0x3ce08a10, 0x99a1186e, 0x738fd81d, 0xd6ce4a63,
0xa23e2e0a, 0x077fbc74, 0xed517c07, 0x4810ee79,
0x04b1b4d5, 0xa1f026ab, 0x4bdee6d8, 0xee9f74a6,
0x9a6f10cf, 0x3f2e82b1, 0xd50042c2, 0x7041d0bc,
0xad060c8e, 0x08479ef0, 0xe2695e83, 0x4728ccfd,
0x33d8a894, 0x96993aea, 0x7cb7fa99, 0xd9f668e7,
0x9557324b, 0x3016a035, 0xda386046, 0x7f79f238,
0x0b899651, 0xaec8042f, 0x44e6c45c, 0xe1a75622,
0xdda47104, 0x78e5e37a, 0x92cb2309, 0x378ab177,
0x437ad51e, 0xe63b4760, 0x0c158713, 0xa954156d,
0xe5f54fc1, 0x40b4ddbf, 0xaa9a1dcc, 0x0fdb8fb2,
0x7b2bebdb, 0xde6a79a5, 0x3444b9d6, 0x91052ba8
};
static const uint32_t table3_[256] = {
0x00000000, 0xdd45aab8, 0xbf672381, 0x62228939,
0x7b2231f3, 0xa6679b4b, 0xc4451272, 0x1900b8ca,
0xf64463e6, 0x2b01c95e, 0x49234067, 0x9466eadf,
0x8d665215, 0x5023f8ad, 0x32017194, 0xef44db2c,
0xe964b13d, 0x34211b85, 0x560392bc, 0x8b463804,
0x924680ce, 0x4f032a76, 0x2d21a34f, 0xf06409f7,
0x1f20d2db, 0xc2657863, 0xa047f15a, 0x7d025be2,
0x6402e328, 0xb9474990, 0xdb65c0a9, 0x06206a11,
0xd725148b, 0x0a60be33, 0x6842370a, 0xb5079db2,
0xac072578, 0x71428fc0, 0x136006f9, 0xce25ac41,
0x2161776d, 0xfc24ddd5, 0x9e0654ec, 0x4343fe54,
0x5a43469e, 0x8706ec26, 0xe524651f, 0x3861cfa7,
0x3e41a5b6, 0xe3040f0e, 0x81268637, 0x5c632c8f,
0x45639445, 0x98263efd, 0xfa04b7c4, 0x27411d7c,
0xc805c650, 0x15406ce8, 0x7762e5d1, 0xaa274f69,
0xb327f7a3, 0x6e625d1b, 0x0c40d422, 0xd1057e9a,
0xaba65fe7, 0x76e3f55f, 0x14c17c66, 0xc984d6de,
0xd0846e14, 0x0dc1c4ac, 0x6fe34d95, 0xb2a6e72d,
0x5de23c01, 0x80a796b9, 0xe2851f80, 0x3fc0b538,
0x26c00df2, 0xfb85a74a, 0x99a72e73, 0x44e284cb,
0x42c2eeda, 0x9f874462, 0xfda5cd5b, 0x20e067e3,
0x39e0df29, 0xe4a57591, 0x8687fca8, 0x5bc25610,
0xb4868d3c, 0x69c32784, 0x0be1aebd, 0xd6a40405,
0xcfa4bccf, 0x12e11677, 0x70c39f4e, 0xad8635f6,
0x7c834b6c, 0xa1c6e1d4, 0xc3e468ed, 0x1ea1c255,
0x07a17a9f, 0xdae4d027, 0xb8c6591e, 0x6583f3a6,
0x8ac7288a, 0x57828232, 0x35a00b0b, 0xe8e5a1b3,
0xf1e51979, 0x2ca0b3c1, 0x4e823af8, 0x93c79040,
0x95e7fa51, 0x48a250e9, 0x2a80d9d0, 0xf7c57368,
0xeec5cba2, 0x3380611a, 0x51a2e823, 0x8ce7429b,
0x63a399b7, 0xbee6330f, 0xdcc4ba36, 0x0181108e,
0x1881a844, 0xc5c402fc, 0xa7e68bc5, 0x7aa3217d,
0x52a0c93f, 0x8fe56387, 0xedc7eabe, 0x30824006,
0x2982f8cc, 0xf4c75274, 0x96e5db4d, 0x4ba071f5,
0xa4e4aad9, 0x79a10061, 0x1b838958, 0xc6c623e0,
0xdfc69b2a, 0x02833192, 0x60a1b8ab, 0xbde41213,
0xbbc47802, 0x6681d2ba, 0x04a35b83, 0xd9e6f13b,
0xc0e649f1, 0x1da3e349, 0x7f816a70, 0xa2c4c0c8,
0x4d801be4, 0x90c5b15c, 0xf2e73865, 0x2fa292dd,
0x36a22a17, 0xebe780af, 0x89c50996, 0x5480a32e,
0x8585ddb4, 0x58c0770c, 0x3ae2fe35, 0xe7a7548d,
0xfea7ec47, 0x23e246ff, 0x41c0cfc6, 0x9c85657e,
0x73c1be52, 0xae8414ea, 0xcca69dd3, 0x11e3376b,
0x08e38fa1, 0xd5a62519, 0xb784ac20, 0x6ac10698,
0x6ce16c89, 0xb1a4c631, 0xd3864f08, 0x0ec3e5b0,
0x17c35d7a, 0xca86f7c2, 0xa8a47efb, 0x75e1d443,
0x9aa50f6f, 0x47e0a5d7, 0x25c22cee, 0xf8878656,
0xe1873e9c, 0x3cc29424, 0x5ee01d1d, 0x83a5b7a5,
0xf90696d8, 0x24433c60, 0x4661b559, 0x9b241fe1,
0x8224a72b, 0x5f610d93, 0x3d4384aa, 0xe0062e12,
0x0f42f53e, 0xd2075f86, 0xb025d6bf, 0x6d607c07,
0x7460c4cd, 0xa9256e75, 0xcb07e74c, 0x16424df4,
0x106227e5, 0xcd278d5d, 0xaf050464, 0x7240aedc,
0x6b401616, 0xb605bcae, 0xd4273597, 0x09629f2f,
0xe6264403, 0x3b63eebb, 0x59416782, 0x8404cd3a,
0x9d0475f0, 0x4041df48, 0x22635671, 0xff26fcc9,
0x2e238253, 0xf36628eb, 0x9144a1d2, 0x4c010b6a,
0x5501b3a0, 0x88441918, 0xea669021, 0x37233a99,
0xd867e1b5, 0x05224b0d, 0x6700c234, 0xba45688c,
0xa345d046, 0x7e007afe, 0x1c22f3c7, 0xc167597f,
0xc747336e, 0x1a0299d6, 0x782010ef, 0xa565ba57,
0xbc65029d, 0x6120a825, 0x0302211c, 0xde478ba4,
0x31035088, 0xec46fa30, 0x8e647309, 0x5321d9b1,
0x4a21617b, 0x9764cbc3, 0xf54642fa, 0x2803e842
};
// Used to fetch a naturally-aligned 32-bit word in little endian byte-order
static inline uint32_t LE_LOAD32(const uint8_t *p) {
return DecodeFixed32(reinterpret_cast<const char*>(p));
}
#if defined(HAVE_SSE42) && (defined(__LP64__) || defined(_WIN64))
static inline uint64_t LE_LOAD64(const uint8_t *p) {
return DecodeFixed64(reinterpret_cast<const char*>(p));
}
#endif
static inline void Slow_CRC32(uint64_t* l, uint8_t const **p) {
uint32_t c = static_cast<uint32_t>(*l ^ LE_LOAD32(*p));
*p += 4;
*l = table3_[c & 0xff] ^
table2_[(c >> 8) & 0xff] ^
table1_[(c >> 16) & 0xff] ^
table0_[c >> 24];
// DO it twice.
c = static_cast<uint32_t>(*l ^ LE_LOAD32(*p));
*p += 4;
*l = table3_[c & 0xff] ^
table2_[(c >> 8) & 0xff] ^
table1_[(c >> 16) & 0xff] ^
table0_[c >> 24];
}
static inline void Fast_CRC32(uint64_t* l, uint8_t const **p) {
#ifndef HAVE_SSE42
Slow_CRC32(l, p);
#elif defined(__LP64__) || defined(_WIN64)
*l = _mm_crc32_u64(*l, LE_LOAD64(*p));
*p += 8;
#else
*l = _mm_crc32_u32(static_cast<unsigned int>(*l), LE_LOAD32(*p));
*p += 4;
*l = _mm_crc32_u32(static_cast<unsigned int>(*l), LE_LOAD32(*p));
*p += 4;
#endif
}
template<void (*CRC32)(uint64_t*, uint8_t const**)>
uint32_t ExtendImpl(uint32_t crc, const char* buf, size_t size) {
const uint8_t *p = reinterpret_cast<const uint8_t *>(buf);
const uint8_t *e = p + size;
uint64_t l = crc ^ 0xffffffffu;
// Align n to (1 << m) byte boundary
#define ALIGN(n, m) ((n + ((1 << m) - 1)) & ~((1 << m) - 1))
#define STEP1 do { \
int c = (l & 0xff) ^ *p++; \
l = table0_[c] ^ (l >> 8); \
} while (0)
// Point x at first 16-byte aligned byte in string. This might be
// just past the end of the string.
const uintptr_t pval = reinterpret_cast<uintptr_t>(p);
const uint8_t* x = reinterpret_cast<const uint8_t*>(ALIGN(pval, 4));
if (x <= e) {
// Process bytes until finished or p is 16-byte aligned
while (p != x) {
STEP1;
}
}
// Process bytes 16 at a time
while ((e-p) >= 16) {
CRC32(&l, &p);
CRC32(&l, &p);
}
// Process bytes 8 at a time
while ((e-p) >= 8) {
CRC32(&l, &p);
}
// Process the last few bytes
while (p != e) {
STEP1;
}
#undef STEP1
#undef ALIGN
return static_cast<uint32_t>(l ^ 0xffffffffu);
}
// Detect if SS42 or not.
#ifndef HAVE_POWER8
static bool isSSE42() {
#ifndef HAVE_SSE42
return false;
#elif defined(__GNUC__) && defined(__x86_64__) && !defined(IOS_CROSS_COMPILE)
uint32_t c_;
__asm__("cpuid" : "=c"(c_) : "a"(1) : "ebx", "edx");
return c_ & (1U << 20); // copied from CpuId.h in Folly. Test SSE42
#elif defined(_WIN64)
int info[4];
__cpuidex(info, 0x00000001, 0);
return (info[2] & ((int)1 << 20)) != 0;
#else
return false;
#endif
}
static bool isPCLMULQDQ() {
#ifndef HAVE_SSE42
// in build_detect_platform we set this macro when both SSE42 and PCLMULQDQ are
// supported by compiler
return false;
#elif defined(__GNUC__) && defined(__x86_64__) && !defined(IOS_CROSS_COMPILE)
uint32_t c_;
__asm__("cpuid" : "=c"(c_) : "a"(1) : "ebx", "edx");
return c_ & (1U << 1); // PCLMULQDQ is in bit 1 (not bit 0)
#elif defined(_WIN64)
int info[4];
__cpuidex(info, 0x00000001, 0);
return (info[2] & ((int)1 << 1)) != 0;
#else
return false;
#endif
}
#endif // HAVE_POWER8
typedef uint32_t (*Function)(uint32_t, const char*, size_t);
#if defined(HAVE_POWER8) && defined(HAS_ALTIVEC)
uint32_t ExtendPPCImpl(uint32_t crc, const char *buf, size_t size) {
return crc32c_ppc(crc, (const unsigned char *)buf, size);
}
#if __linux__
static int arch_ppc_probe(void) {
arch_ppc_crc32 = 0;
#if defined(__powerpc64__)
if (getauxval(AT_HWCAP2) & PPC_FEATURE2_VEC_CRYPTO) arch_ppc_crc32 = 1;
#endif /* __powerpc64__ */
return arch_ppc_crc32;
}
#endif // __linux__
static bool isAltiVec() {
if (arch_ppc_probe()) {
return true;
} else {
return false;
}
}
#endif
std::string IsFastCrc32Supported() {
bool has_fast_crc = false;
std::string fast_zero_msg;
std::string arch;
#ifdef HAVE_POWER8
#ifdef HAS_ALTIVEC
if (arch_ppc_probe()) {
has_fast_crc = true;
arch = "PPC";
}
#else
has_fast_crc = false;
arch = "PPC";
#endif
#else
has_fast_crc = isSSE42();
arch = "x86";
#endif
if (has_fast_crc) {
fast_zero_msg.append("Supported on " + arch);
}
else {
fast_zero_msg.append("Not supported on " + arch);
}
return fast_zero_msg;
}
/*
* Copyright 2016 Ferry Toth, Exalon Delft BV, The Netherlands
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the author be held liable for any damages
* arising from the use of this software.
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
* Ferry Toth
*
* https://github.com/htot/crc32c
*
* Modified by Facebook
*
* Original intel whitepaper:
* "Fast CRC Computation for iSCSI Polynomial Using CRC32 Instruction"
* https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/crc-iscsi-polynomial-crc32-instruction-paper.pdf
*
* This version is from the folly library, created by Dave Watson <[email protected]>
*
*/
#if defined HAVE_SSE42 && defined HAVE_PCLMUL
#define CRCtriplet(crc, buf, offset) \
crc##0 = _mm_crc32_u64(crc##0, *(buf##0 + offset)); \
crc##1 = _mm_crc32_u64(crc##1, *(buf##1 + offset)); \
crc##2 = _mm_crc32_u64(crc##2, *(buf##2 + offset));
#define CRCduplet(crc, buf, offset) \
crc##0 = _mm_crc32_u64(crc##0, *(buf##0 + offset)); \
crc##1 = _mm_crc32_u64(crc##1, *(buf##1 + offset));
#define CRCsinglet(crc, buf, offset) \
crc = _mm_crc32_u64(crc, *(uint64_t*)(buf + offset));
// Numbers taken directly from intel whitepaper.
// clang-format off
const uint64_t clmul_constants[] = {
0x14cd00bd6, 0x105ec76f0, 0x0ba4fc28e, 0x14cd00bd6,
0x1d82c63da, 0x0f20c0dfe, 0x09e4addf8, 0x0ba4fc28e,
0x039d3b296, 0x1384aa63a, 0x102f9b8a2, 0x1d82c63da,
0x14237f5e6, 0x01c291d04, 0x00d3b6092, 0x09e4addf8,
0x0c96cfdc0, 0x0740eef02, 0x18266e456, 0x039d3b296,
0x0daece73e, 0x0083a6eec, 0x0ab7aff2a, 0x102f9b8a2,
0x1248ea574, 0x1c1733996, 0x083348832, 0x14237f5e6,
0x12c743124, 0x02ad91c30, 0x0b9e02b86, 0x00d3b6092,
0x018b33a4e, 0x06992cea2, 0x1b331e26a, 0x0c96cfdc0,
0x17d35ba46, 0x07e908048, 0x1bf2e8b8a, 0x18266e456,
0x1a3e0968a, 0x11ed1f9d8, 0x0ce7f39f4, 0x0daece73e,
0x061d82e56, 0x0f1d0f55e, 0x0d270f1a2, 0x0ab7aff2a,
0x1c3f5f66c, 0x0a87ab8a8, 0x12ed0daac, 0x1248ea574,
0x065863b64, 0x08462d800, 0x11eef4f8e, 0x083348832,
0x1ee54f54c, 0x071d111a8, 0x0b3e32c28, 0x12c743124,
0x0064f7f26, 0x0ffd852c6, 0x0dd7e3b0c, 0x0b9e02b86,
0x0f285651c, 0x0dcb17aa4, 0x010746f3c, 0x018b33a4e,
0x1c24afea4, 0x0f37c5aee, 0x0271d9844, 0x1b331e26a,
0x08e766a0c, 0x06051d5a2, 0x093a5f730, 0x17d35ba46,
0x06cb08e5c, 0x11d5ca20e, 0x06b749fb2, 0x1bf2e8b8a,
0x1167f94f2, 0x021f3d99c, 0x0cec3662e, 0x1a3e0968a,
0x19329634a, 0x08f158014, 0x0e6fc4e6a, 0x0ce7f39f4,
0x08227bb8a, 0x1a5e82106, 0x0b0cd4768, 0x061d82e56,
0x13c2b89c4, 0x188815ab2, 0x0d7a4825c, 0x0d270f1a2,
0x10f5ff2ba, 0x105405f3e, 0x00167d312, 0x1c3f5f66c,
0x0f6076544, 0x0e9adf796, 0x026f6a60a, 0x12ed0daac,
0x1a2adb74e, 0x096638b34, 0x19d34af3a, 0x065863b64,
0x049c3cc9c, 0x1e50585a0, 0x068bce87a, 0x11eef4f8e,
0x1524fa6c6, 0x19f1c69dc, 0x16cba8aca, 0x1ee54f54c,
0x042d98888, 0x12913343e, 0x1329d9f7e, 0x0b3e32c28,
0x1b1c69528, 0x088f25a3a, 0x02178513a, 0x0064f7f26,
0x0e0ac139e, 0x04e36f0b0, 0x0170076fa, 0x0dd7e3b0c,
0x141a1a2e2, 0x0bd6f81f8, 0x16ad828b4, 0x0f285651c,
0x041d17b64, 0x19425cbba, 0x1fae1cc66, 0x010746f3c,
0x1a75b4b00, 0x18db37e8a, 0x0f872e54c, 0x1c24afea4,
0x01e41e9fc, 0x04c144932, 0x086d8e4d2, 0x0271d9844,
0x160f7af7a, 0x052148f02, 0x05bb8f1bc, 0x08e766a0c,
0x0a90fd27a, 0x0a3c6f37a, 0x0b3af077a, 0x093a5f730,
0x04984d782, 0x1d22c238e, 0x0ca6ef3ac, 0x06cb08e5c,
0x0234e0b26, 0x063ded06a, 0x1d88abd4a, 0x06b749fb2,
0x04597456a, 0x04d56973c, 0x0e9e28eb4, 0x1167f94f2,
0x07b3ff57a, 0x19385bf2e, 0x0c9c8b782, 0x0cec3662e,
0x13a9cba9e, 0x0e417f38a, 0x093e106a4, 0x19329634a,
0x167001a9c, 0x14e727980, 0x1ddffc5d4, 0x0e6fc4e6a,
0x00df04680, 0x0d104b8fc, 0x02342001e, 0x08227bb8a,
0x00a2a8d7e, 0x05b397730, 0x168763fa6, 0x0b0cd4768,
0x1ed5a407a, 0x0e78eb416, 0x0d2c3ed1a, 0x13c2b89c4,
0x0995a5724, 0x1641378f0, 0x19b1afbc4, 0x0d7a4825c,
0x109ffedc0, 0x08d96551c, 0x0f2271e60, 0x10f5ff2ba,
0x00b0bf8ca, 0x00bf80dd2, 0x123888b7a, 0x00167d312,
0x1e888f7dc, 0x18dcddd1c, 0x002ee03b2, 0x0f6076544,
0x183e8d8fe, 0x06a45d2b2, 0x133d7a042, 0x026f6a60a,
0x116b0f50c, 0x1dd3e10e8, 0x05fabe670, 0x1a2adb74e,
0x130004488, 0x0de87806c, 0x000bcf5f6, 0x19d34af3a,
0x18f0c7078, 0x014338754, 0x017f27698, 0x049c3cc9c,
0x058ca5f00, 0x15e3e77ee, 0x1af900c24, 0x068bce87a,
0x0b5cfca28, 0x0dd07448e, 0x0ded288f8, 0x1524fa6c6,
0x059f229bc, 0x1d8048348, 0x06d390dec, 0x16cba8aca,
0x037170390, 0x0a3e3e02c, 0x06353c1cc, 0x042d98888,
0x0c4584f5c, 0x0d73c7bea, 0x1f16a3418, 0x1329d9f7e,
0x0531377e2, 0x185137662, 0x1d8d9ca7c, 0x1b1c69528,
0x0b25b29f2, 0x18a08b5bc, 0x19fb2a8b0, 0x02178513a,
0x1a08fe6ac, 0x1da758ae0, 0x045cddf4e, 0x0e0ac139e,
0x1a91647f2, 0x169cf9eb0, 0x1a0f717c4, 0x0170076fa,
};
// Compute the crc32c value for buffer smaller than 8
#ifdef ROCKSDB_UBSAN_RUN
#if defined(__clang__)
__attribute__((__no_sanitize__("alignment")))
#elif defined(__GNUC__)
__attribute__((__no_sanitize_undefined__))
#endif
#endif
inline void align_to_8(
size_t len,
uint64_t& crc0, // crc so far, updated on return
const unsigned char*& next) { // next data pointer, updated on return
uint32_t crc32bit = static_cast<uint32_t>(crc0);
if (len & 0x04) {
crc32bit = _mm_crc32_u32(crc32bit, *(uint32_t*)next);
next += sizeof(uint32_t);
}
if (len & 0x02) {
crc32bit = _mm_crc32_u16(crc32bit, *(uint16_t*)next);
next += sizeof(uint16_t);
}
if (len & 0x01) {
crc32bit = _mm_crc32_u8(crc32bit, *(next));
next++;
}
crc0 = crc32bit;
}
//
// CombineCRC performs pclmulqdq multiplication of 2 partial CRC's and a well
// chosen constant and xor's these with the remaining CRC.
//
inline uint64_t CombineCRC(
size_t block_size,
uint64_t crc0,
uint64_t crc1,
uint64_t crc2,
const uint64_t* next2) {
const auto multiplier =
*(reinterpret_cast<const __m128i*>(clmul_constants) + block_size - 1);
const auto crc0_xmm = _mm_set_epi64x(0, crc0);
const auto res0 = _mm_clmulepi64_si128(crc0_xmm, multiplier, 0x00);
const auto crc1_xmm = _mm_set_epi64x(0, crc1);
const auto res1 = _mm_clmulepi64_si128(crc1_xmm, multiplier, 0x10);
const auto res = _mm_xor_si128(res0, res1);
crc0 = _mm_cvtsi128_si64(res);
crc0 = crc0 ^ *((uint64_t*)next2 - 1);
crc2 = _mm_crc32_u64(crc2, crc0);
return crc2;
}
// Compute CRC-32C using the Intel hardware instruction.
#ifdef ROCKSDB_UBSAN_RUN
#if defined(__clang__)
__attribute__((__no_sanitize__("alignment")))
#elif defined(__GNUC__)
__attribute__((__no_sanitize_undefined__))
#endif
#endif
uint32_t crc32c_3way(uint32_t crc, const char* buf, size_t len) {
const unsigned char* next = (const unsigned char*)buf;
uint64_t count;
uint64_t crc0, crc1, crc2;
crc0 = crc ^ 0xffffffffu;
if (len >= 8) {
// if len > 216 then align and use triplets
if (len > 216) {
{
// Work on the bytes (< 8) before the first 8-byte alignment addr starts
uint64_t align_bytes = (8 - (uintptr_t)next) & 7;
len -= align_bytes;
align_to_8(align_bytes, crc0, next);
}
// Now work on the remaining blocks
count = len / 24; // number of triplets
len %= 24; // bytes remaining
uint64_t n = count >> 7; // #blocks = first block + full blocks
uint64_t block_size = count & 127;
if (block_size == 0) {
block_size = 128;
} else {
n++;
}
// points to the first byte of the next block
const uint64_t* next0 = (uint64_t*)next + block_size;
const uint64_t* next1 = next0 + block_size;
const uint64_t* next2 = next1 + block_size;
crc1 = crc2 = 0;
// Use Duff's device, a for() loop inside a switch()
// statement. This needs to execute at least once, round len
// down to nearest triplet multiple
switch (block_size) {
case 128:
do {
// jumps here for a full block of len 128
CRCtriplet(crc, next, -128);
FALLTHROUGH_INTENDED;
case 127:
// jumps here or below for the first block smaller
CRCtriplet(crc, next, -127);
FALLTHROUGH_INTENDED;
case 126:
CRCtriplet(crc, next, -126); // than 128
FALLTHROUGH_INTENDED;
case 125:
CRCtriplet(crc, next, -125);
FALLTHROUGH_INTENDED;
case 124:
CRCtriplet(crc, next, -124);
FALLTHROUGH_INTENDED;
case 123:
CRCtriplet(crc, next, -123);
FALLTHROUGH_INTENDED;
case 122:
CRCtriplet(crc, next, -122);
FALLTHROUGH_INTENDED;
case 121:
CRCtriplet(crc, next, -121);
FALLTHROUGH_INTENDED;
case 120:
CRCtriplet(crc, next, -120);
FALLTHROUGH_INTENDED;
case 119:
CRCtriplet(crc, next, -119);
FALLTHROUGH_INTENDED;
case 118:
CRCtriplet(crc, next, -118);
FALLTHROUGH_INTENDED;
case 117:
CRCtriplet(crc, next, -117);
FALLTHROUGH_INTENDED;
case 116:
CRCtriplet(crc, next, -116);
FALLTHROUGH_INTENDED;
case 115:
CRCtriplet(crc, next, -115);
FALLTHROUGH_INTENDED;
case 114:
CRCtriplet(crc, next, -114);
FALLTHROUGH_INTENDED;
case 113:
CRCtriplet(crc, next, -113);
FALLTHROUGH_INTENDED;
case 112:
CRCtriplet(crc, next, -112);
FALLTHROUGH_INTENDED;
case 111:
CRCtriplet(crc, next, -111);
FALLTHROUGH_INTENDED;
case 110:
CRCtriplet(crc, next, -110);
FALLTHROUGH_INTENDED;
case 109:
CRCtriplet(crc, next, -109);
FALLTHROUGH_INTENDED;
case 108:
CRCtriplet(crc, next, -108);
FALLTHROUGH_INTENDED;
case 107:
CRCtriplet(crc, next, -107);
FALLTHROUGH_INTENDED;
case 106:
CRCtriplet(crc, next, -106);
FALLTHROUGH_INTENDED;
case 105:
CRCtriplet(crc, next, -105);
FALLTHROUGH_INTENDED;
case 104:
CRCtriplet(crc, next, -104);
FALLTHROUGH_INTENDED;
case 103:
CRCtriplet(crc, next, -103);
FALLTHROUGH_INTENDED;
case 102:
CRCtriplet(crc, next, -102);
FALLTHROUGH_INTENDED;
case 101:
CRCtriplet(crc, next, -101);
FALLTHROUGH_INTENDED;
case 100:
CRCtriplet(crc, next, -100);
FALLTHROUGH_INTENDED;
case 99:
CRCtriplet(crc, next, -99);
FALLTHROUGH_INTENDED;
case 98:
CRCtriplet(crc, next, -98);
FALLTHROUGH_INTENDED;
case 97:
CRCtriplet(crc, next, -97);
FALLTHROUGH_INTENDED;
case 96:
CRCtriplet(crc, next, -96);
FALLTHROUGH_INTENDED;
case 95:
CRCtriplet(crc, next, -95);
FALLTHROUGH_INTENDED;
case 94:
CRCtriplet(crc, next, -94);
FALLTHROUGH_INTENDED;
case 93:
CRCtriplet(crc, next, -93);
FALLTHROUGH_INTENDED;
case 92:
CRCtriplet(crc, next, -92);
FALLTHROUGH_INTENDED;
case 91:
CRCtriplet(crc, next, -91);
FALLTHROUGH_INTENDED;
case 90:
CRCtriplet(crc, next, -90);
FALLTHROUGH_INTENDED;
case 89:
CRCtriplet(crc, next, -89);
FALLTHROUGH_INTENDED;
case 88:
CRCtriplet(crc, next, -88);
FALLTHROUGH_INTENDED;
case 87:
CRCtriplet(crc, next, -87);
FALLTHROUGH_INTENDED;
case 86:
CRCtriplet(crc, next, -86);
FALLTHROUGH_INTENDED;
case 85:
CRCtriplet(crc, next, -85);
FALLTHROUGH_INTENDED;
case 84:
CRCtriplet(crc, next, -84);
FALLTHROUGH_INTENDED;
case 83:
CRCtriplet(crc, next, -83);
FALLTHROUGH_INTENDED;
case 82:
CRCtriplet(crc, next, -82);
FALLTHROUGH_INTENDED;
case 81:
CRCtriplet(crc, next, -81);
FALLTHROUGH_INTENDED;
case 80:
CRCtriplet(crc, next, -80);
FALLTHROUGH_INTENDED;
case 79:
CRCtriplet(crc, next, -79);
FALLTHROUGH_INTENDED;
case 78:
CRCtriplet(crc, next, -78);
FALLTHROUGH_INTENDED;
case 77:
CRCtriplet(crc, next, -77);
FALLTHROUGH_INTENDED;
case 76:
CRCtriplet(crc, next, -76);
FALLTHROUGH_INTENDED;
case 75:
CRCtriplet(crc, next, -75);
FALLTHROUGH_INTENDED;
case 74:
CRCtriplet(crc, next, -74);
FALLTHROUGH_INTENDED;
case 73:
CRCtriplet(crc, next, -73);
FALLTHROUGH_INTENDED;
case 72:
CRCtriplet(crc, next, -72);
FALLTHROUGH_INTENDED;
case 71:
CRCtriplet(crc, next, -71);
FALLTHROUGH_INTENDED;
case 70:
CRCtriplet(crc, next, -70);
FALLTHROUGH_INTENDED;
case 69:
CRCtriplet(crc, next, -69);
FALLTHROUGH_INTENDED;
case 68:
CRCtriplet(crc, next, -68);
FALLTHROUGH_INTENDED;
case 67:
CRCtriplet(crc, next, -67);
FALLTHROUGH_INTENDED;
case 66:
CRCtriplet(crc, next, -66);
FALLTHROUGH_INTENDED;
case 65:
CRCtriplet(crc, next, -65);
FALLTHROUGH_INTENDED;
case 64:
CRCtriplet(crc, next, -64);
FALLTHROUGH_INTENDED;
case 63:
CRCtriplet(crc, next, -63);
FALLTHROUGH_INTENDED;
case 62:
CRCtriplet(crc, next, -62);
FALLTHROUGH_INTENDED;
case 61:
CRCtriplet(crc, next, -61);
FALLTHROUGH_INTENDED;
case 60:
CRCtriplet(crc, next, -60);
FALLTHROUGH_INTENDED;
case 59:
CRCtriplet(crc, next, -59);
FALLTHROUGH_INTENDED;
case 58:
CRCtriplet(crc, next, -58);
FALLTHROUGH_INTENDED;
case 57:
CRCtriplet(crc, next, -57);
FALLTHROUGH_INTENDED;
case 56:
CRCtriplet(crc, next, -56);
FALLTHROUGH_INTENDED;
case 55:
CRCtriplet(crc, next, -55);
FALLTHROUGH_INTENDED;
case 54:
CRCtriplet(crc, next, -54);
FALLTHROUGH_INTENDED;
case 53:
CRCtriplet(crc, next, -53);
FALLTHROUGH_INTENDED;
case 52:
CRCtriplet(crc, next, -52);
FALLTHROUGH_INTENDED;
case 51:
CRCtriplet(crc, next, -51);
FALLTHROUGH_INTENDED;
case 50:
CRCtriplet(crc, next, -50);
FALLTHROUGH_INTENDED;
case 49:
CRCtriplet(crc, next, -49);
FALLTHROUGH_INTENDED;
case 48:
CRCtriplet(crc, next, -48);
FALLTHROUGH_INTENDED;
case 47:
CRCtriplet(crc, next, -47);
FALLTHROUGH_INTENDED;
case 46:
CRCtriplet(crc, next, -46);
FALLTHROUGH_INTENDED;
case 45:
CRCtriplet(crc, next, -45);
FALLTHROUGH_INTENDED;
case 44:
CRCtriplet(crc, next, -44);
FALLTHROUGH_INTENDED;
case 43:
CRCtriplet(crc, next, -43);
FALLTHROUGH_INTENDED;
case 42:
CRCtriplet(crc, next, -42);
FALLTHROUGH_INTENDED;
case 41:
CRCtriplet(crc, next, -41);
FALLTHROUGH_INTENDED;
case 40:
CRCtriplet(crc, next, -40);
FALLTHROUGH_INTENDED;
case 39:
CRCtriplet(crc, next, -39);
FALLTHROUGH_INTENDED;
case 38:
CRCtriplet(crc, next, -38);
FALLTHROUGH_INTENDED;
case 37:
CRCtriplet(crc, next, -37);
FALLTHROUGH_INTENDED;
case 36:
CRCtriplet(crc, next, -36);
FALLTHROUGH_INTENDED;
case 35:
CRCtriplet(crc, next, -35);
FALLTHROUGH_INTENDED;
case 34:
CRCtriplet(crc, next, -34);
FALLTHROUGH_INTENDED;
case 33:
CRCtriplet(crc, next, -33);
FALLTHROUGH_INTENDED;
case 32:
CRCtriplet(crc, next, -32);
FALLTHROUGH_INTENDED;
case 31:
CRCtriplet(crc, next, -31);
FALLTHROUGH_INTENDED;