blob: 0ff8a93385a221bc9c423f5e05979202c1253cc4 (
plain) (
blame)
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
59
60
61
|
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file bswap.h
* byte swapping routines
*/
#ifndef AVUTIL_X86_BSWAP_H
#define AVUTIL_X86_BSWAP_H
#include <stdint.h>
#include "config.h"
#include "libavutil/common.h"
#define bswap_16 bswap_16
static av_always_inline av_const uint16_t bswap_16(uint16_t x)
{
__asm__("rorw $8, %0" : "+r"(x));
return x;
}
#define bswap_32 bswap_32
static av_always_inline av_const uint32_t bswap_32(uint32_t x)
{
#if HAVE_BSWAP
__asm__("bswap %0" : "+r" (x));
#else
__asm__("rorw $8, %w0 \n\t"
"rorl $16, %0 \n\t"
"rorw $8, %w0"
: "+r"(x));
#endif
return x;
}
#if ARCH_X86_64
#define bswap_64 bswap_64
static inline uint64_t av_const bswap_64(uint64_t x)
{
__asm__("bswap %0": "=r" (x) : "0" (x));
return x;
}
#endif
#endif /* AVUTIL_X86_BSWAP_H */
|
