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 * $FreeBSD$
6 */
7
8#ifndef _SYS_GSB_CRC32_H_
9#define _SYS_GSB_CRC32_H_
10
11#include <sys/types.h>
12
13#ifdef _KERNEL
14
15extern const uint32_t crc32_tab[];
16
17static __inline uint32_t
18crc32_raw(const void *buf, size_t size, uint32_t crc)
19{
20	const uint8_t *p = (const uint8_t *)buf;
21
22	while (size--)
23		crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
24	return (crc);
25}
26
27static __inline uint32_t
28crc32(const void *buf, size_t size)
29{
30	uint32_t crc;
31
32	crc = crc32_raw(buf, size, ~0U);
33	return (crc ^ ~0U);
34}
35#endif
36
37uint32_t calculate_crc32c(uint32_t crc32c, const unsigned char *buffer,
38    unsigned int length);
39
40#if defined(__amd64__) || defined(__i386__)
41uint32_t sse42_crc32c(uint32_t, const unsigned char *, unsigned);
42#endif
43#if defined(__aarch64__)
44uint32_t armv8_crc32c(uint32_t, const unsigned char *, unsigned int);
45#endif
46
47#ifdef TESTING
48uint32_t singletable_crc32c(uint32_t, const void *, size_t);
49uint32_t multitable_crc32c(uint32_t, const void *, size_t);
50#endif
51
52#endif /* !_SYS_GSB_CRC32_H_ */
53