gsb_crc32.h

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    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 #endif
   36 
   37 uint32_t calculate_crc32c(uint32_t crc32c, const unsigned char *buffer,
   38     unsigned int length);
   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 #ifdef TESTING
   48 uint32_t singletable_crc32c(uint32_t, const void *, size_t);
   49 uint32_t multitable_crc32c(uint32_t, const void *, size_t);
   50 #endif
   51 
   52 #endif /* !_SYS_GSB_CRC32_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/sys/gsb_crc32.h

FreeBSD/Linux Kernel Cross Reference
sys/sys/gsb_crc32.h