1 /* crc32c -- calculate and POSIX.2 checksum
2 Copyright (C) 92, 1995-1999 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
17
18 #ifndef CRC32C_H
19 #define CRC32C_H
20
21 #include "../arch/arch.h"
22
23 extern uint32_t crc32c_sw(unsigned char const *, unsigned long);
24 extern int crc32c_intel_available;
25
26 #ifdef ARCH_HAVE_SSE4_2
27 extern uint32_t crc32c_intel(unsigned char const *, unsigned long);
28 extern void crc32c_intel_probe(void);
29 #else
30 #define crc32c_intel crc32c_sw
crc32c_intel_probe(void)31 static inline void crc32c_intel_probe(void)
32 {
33 }
34 #endif
35
fio_crc32c(unsigned char const * buf,unsigned long len)36 static inline uint32_t fio_crc32c(unsigned char const *buf, unsigned long len)
37 {
38 if (crc32c_intel_available)
39 return crc32c_intel(buf, len);
40
41 return crc32c_sw(buf, len);
42 }
43
44 #endif
45