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lfsr.c
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/*
* Galois LFSR
* From:
* https://en.wikipedia.org/wiki/Linear-feedback_shift_register
*/
const unsigned long lfsr_taps[] = {
0,
0,
(1UL << (2-1)) | (1UL << (1-1)),
(1UL << (3-1)) | (1UL << (2-1)),
(1UL << (4-1)) | (1UL << (3-1)),
(1UL << (5-1)) | (1UL << (3-1)),
(1UL << (6-1)) | (1UL << (5-1)),
(1UL << (7-1)) | (1UL << (6-1)),
(1UL << (8-1)) | (1UL << (6-1)) | (1UL << (5-1)) | (1UL << (4-1)),
(1UL << (9-1)) | (1UL << (5-1)),
(1UL << (10-1)) | (1UL << (7-1)),
(1UL << (11-1)) | (1UL << (9-1)),
(1UL << (12-1)) | (1UL << (6-1)) | (1UL << (4-1)) | (1UL << (1-1)),
(1UL << (13-1)) | (1UL << (4-1)) | (1UL << (3-1)) | (1UL << (1-1)),
(1UL << (14-1)) | (1UL << (5-1)) | (1UL << (3-1)) | (1UL << (1-1)),
(1UL << (15-1)) | (1UL << (14-1)),
(1UL << (16-1)) | (1UL << (15-1)) | (1UL << (13-1)) | (1UL << (4-1)),
(1UL << (17-1)) | (1UL << (14-1)),
(1UL << (18-1)) | (1UL << (11-1)),
(1UL << (19-1)) | (1UL << (6-1)) | (1UL << (2-1)) | (1UL << (1-1)),
(1UL << (20-1)) | (1UL << (17-1)),
(1UL << (21-1)) | (1UL << (19-1)),
(1UL << (22-1)) | (1UL << (21-1)),
(1UL << (23-1)) | (1UL << (18-1)),
(1UL << (24-1)) | (1UL << (23-1)) | (1UL << (22-1)) | (1UL << (17-1)),
(1UL << (25-1)) | (1UL << (22-1)),
(1UL << (26-1)) | (1UL << (6-1)) | (1UL << (2-1)) | (1UL << (1-1)),
(1UL << (27-1)) | (1UL << (5-1)) | (1UL << (2-1)) | (1UL << (1-1)),
(1UL << (28-1)) | (1UL << (25-1)),
(1UL << (29-1)) | (1UL << (27-1)),
(1UL << (30-1)) | (1UL << (6-1)) | (1UL << (4-1)) | (1UL << (1-1)),
(1UL << (31-1)) | (1UL << (28-1)),
(1UL << (32-1)) | (1UL << (22-1)) | (1UL << (2-1)) | (1UL << (1-1)),
#ifdef __LP64__
(1UL << (33-1)) | (1UL << (20-1)),
(1UL << (34-1)) | (1UL << (27-1)) | (1UL << (2-1)) | (1UL << (1-1)),
(1UL << (35-1)) | (1UL << (33-1)),
(1UL << (36-1)) | (1UL << (25-1)),
(1UL << (37-1)) | (1UL << (5-1)) | (1UL << (4-1)) | (1UL << (3-1)) | (1UL << (2-1)) | (1UL << (1-1)),
(1UL << (38-1)) | (1UL << (6-1)) | (1UL << (5-1)) | (1UL << (1-1)),
(1UL << (39-1)) | (1UL << (35-1)),
(1UL << (40-1)) | (1UL << (38-1)) | (1UL << (21-1)) | (1UL << (19-1)),
(1UL << (41-1)) | (1UL << (38-1)),
(1UL << (42-1)) | (1UL << (41-1)) | (1UL << (20-1)) | (1UL << (19-1)),
(1UL << (43-1)) | (1UL << (42-1)) | (1UL << (38-1)) | (1UL << (37-1)),
(1UL << (44-1)) | (1UL << (43-1)) | (1UL << (18-1)) | (1UL << (17-1)),
(1UL << (45-1)) | (1UL << (44-1)) | (1UL << (42-1)) | (1UL << (41-1)),
(1UL << (46-1)) | (1UL << (45-1)) | (1UL << (26-1)) | (1UL << (25-1)),
(1UL << (47-1)) | (1UL << (42-1)),
(1UL << (48-1)) | (1UL << (47-1)) | (1UL << (21-1)) | (1UL << (20-1)),
(1UL << (49-1)) | (1UL << (40-1)),
(1UL << (50-1)) | (1UL << (49-1)) | (1UL << (24-1)) | (1UL << (23-1)),
(1UL << (51-1)) | (1UL << (50-1)) | (1UL << (36-1)) | (1UL << (35-1)),
(1UL << (52-1)) | (1UL << (49-1)),
(1UL << (53-1)) | (1UL << (52-1)) | (1UL << (38-1)) | (1UL << (37-1)),
(1UL << (54-1)) | (1UL << (53-1)) | (1UL << (18-1)) | (1UL << (17-1)),
(1UL << (55-1)) | (1UL << (31-1)),
(1UL << (56-1)) | (1UL << (55-1)) | (1UL << (35-1)) | (1UL << (34-1)),
(1UL << (57-1)) | (1UL << (50-1)),
(1UL << (58-1)) | (1UL << (39-1)),
(1UL << (59-1)) | (1UL << (58-1)) | (1UL << (38-1)) | (1UL << (37-1)),
(1UL << (60-1)) | (1UL << (59-1)),
(1UL << (61-1)) | (1UL << (60-1)) | (1UL << (46-1)) | (1UL << (45-1)),
(1UL << (62-1)) | (1UL << (61-1)) | (1UL << (6-1)) | (1UL << (5-1)),
(1UL << (63-1)) | (1UL << (62-1)),
#endif
};