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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_arm64_available;
25 extern int crc32c_intel_available;
26 
27 #ifdef ARCH_HAVE_ARM64_CRC_CRYPTO
28 extern uint32_t crc32c_arm64(unsigned char const *, unsigned long);
29 extern void crc32c_arm64_probe(void);
30 #else
31 #define crc32c_arm64 crc32c_sw
crc32c_arm64_probe(void)32 static inline void crc32c_arm64_probe(void)
33 {
34 }
35 #endif
36 
37 #ifdef ARCH_HAVE_SSE4_2
38 extern uint32_t crc32c_intel(unsigned char const *, unsigned long);
39 extern void crc32c_intel_probe(void);
40 #else
41 #define crc32c_intel crc32c_sw
crc32c_intel_probe(void)42 static inline void crc32c_intel_probe(void)
43 {
44 }
45 #endif
46 
fio_crc32c(unsigned char const * buf,unsigned long len)47 static inline uint32_t fio_crc32c(unsigned char const *buf, unsigned long len)
48 {
49 	if (crc32c_arm64_available)
50 		return crc32c_arm64(buf, len);
51 
52 	if (crc32c_intel_available)
53 		return crc32c_intel(buf, len);
54 
55 	return crc32c_sw(buf, len);
56 }
57 
58 #endif
59