1/*-
2 * COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or
3 * code or tables extracted from it, as desired without restriction.
4 */
5
6#ifndef _SYS_GSB_CRC32_H_
7#define _SYS_GSB_CRC32_H_
8
9#include <sys/types.h>
10
11#ifdef _KERNEL
12
13extern const uint32_t crc32_tab[];
14
15static __inline uint32_t
16crc32_raw(const void *buf, size_t size, uint32_t crc)
17{
18 const uint8_t *p = (const uint8_t *)buf;
19
20 while (size--)
21 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
22 return (crc);
23}
24
25static __inline uint32_t
26crc32(const void *buf, size_t size)
27{
28 uint32_t crc;
29
30 crc = crc32_raw(buf, size, ~0U);
31 return (crc ^ ~0U);
32}
33#endif
34
35uint32_t calculate_crc32c(uint32_t crc32c, const unsigned char *buffer,
36 unsigned int length);
37
38#if defined(__amd64__) || defined(__i386__)
39uint32_t sse42_crc32c(uint32_t, const unsigned char *, unsigned);
40#endif
41#if defined(__aarch64__)
42uint32_t armv8_crc32c(uint32_t, const unsigned char *, unsigned int);
43#endif
44
45#ifdef TESTING
46uint32_t singletable_crc32c(uint32_t, const void *, size_t);
47uint32_t multitable_crc32c(uint32_t, const void *, size_t);
48#endif
49
50#endif /* !_SYS_GSB_CRC32_H_ */