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 15 extern const uint32_t crc32_tab[]; 16 17 static __inline uint32_t 18 crc32_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 27 static __inline uint32_t 28 crc32(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 36 uint32_t calculate_crc32c(uint32_t crc32c, const unsigned char *buffer, 37 unsigned int length); 38 #endif 39 40 #if defined(__amd64__) || defined(__i386__) 41 uint32_t sse42_crc32c(uint32_t, const unsigned char *, unsigned); 42 #endif 43 #if defined(__aarch64__) 44 uint32_t armv8_crc32c(uint32_t, const unsigned char *, unsigned int); 45 #endif 46 47 #endif /* !_SYS_GSB_CRC32_H_ */ 48