1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#include <my_global.h>
#include <my_sys.h>
#include <zlib.h>
#if !defined(HAVE_CRC32_VPMSUM)
/* TODO: remove this once zlib adds inherent support for hardware accelerated
crc32 for all architectures. */
static unsigned int my_crc32_zlib(unsigned int crc, const void *data,
size_t len)
{
return (unsigned int) crc32(crc, data, (unsigned int) len);
}
my_crc32_t my_checksum= my_crc32_zlib;
#endif
#if __GNUC__ >= 4 && defined(__x86_64__)
extern int crc32_pclmul_enabled();
extern unsigned int crc32_pclmul(unsigned int, const void *, size_t);
/*----------------------------- x86_64 ---------------------------------*/
void my_checksum_init(void)
{
if (crc32_pclmul_enabled())
my_checksum= crc32_pclmul;
}
#elif defined(__GNUC__) && defined(HAVE_ARMV8_CRC)
/*----------------------------- aarch64 --------------------------------*/
extern unsigned int crc32_aarch64(unsigned int, const void *, size_t);
/* Ideally all ARM 64 bit processor should support crc32 but if some model
doesn't support better to find it out through auxillary vector. */
void my_checksum_init(void)
{
if (crc32_aarch64_available())
my_checksum= crc32_aarch64;
}
#else
void my_checksum_init(void) {}
#endif
|
