lfsr.h revision 82af46be1fa0c0e188bbb6723008fa33a510606f 
1#ifndef FIO_LFSR_H
2#define FIO_LFSR_H
3
4#include <inttypes.h>
5
6#define FIO_MAX_TAPS	8
7
8struct lfsr_taps {
9	unsigned int length;
10	unsigned int taps[FIO_MAX_TAPS];
11};
12
13
14struct fio_lfsr {
15	uint64_t last_val;
16	uint64_t max_val;
17	uint64_t num_vals;
18	struct lfsr_taps taps;
19};
20
21int lfsr_next(struct fio_lfsr *fl, uint64_t *off);
22int lfsr_init(struct fio_lfsr *fl, uint64_t size, unsigned long seed);
23
24#endif
25