Libav
Main Page
Related Pages
Modules
Data Structures
Files
Examples
File List
Globals
libavutil
x86
bswap.h
Go to the documentation of this file.
1
/*
2
* This file is part of Libav.
3
*
4
* Libav is free software; you can redistribute it and/or
5
* modify it under the terms of the GNU Lesser General Public
6
* License as published by the Free Software Foundation; either
7
* version 2.1 of the License, or (at your option) any later version.
8
*
9
* Libav 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 GNU
12
* Lesser General Public License for more details.
13
*
14
* You should have received a copy of the GNU Lesser General Public
15
* License along with Libav; if not, write to the Free Software
16
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
*/
18
24
#ifndef AVUTIL_X86_BSWAP_H
25
#define AVUTIL_X86_BSWAP_H
26
27
#include <stdint.h>
28
#include "config.h"
29
#include "
libavutil/attributes.h
"
30
31
#if HAVE_INLINE_ASM
32
33
#if !AV_GCC_VERSION_AT_LEAST(4,1)
34
#define av_bswap16 av_bswap16
35
static
av_always_inline
av_const
unsigned
av_bswap16
(
unsigned
x)
36
{
37
__asm__(
"rorw $8, %w0"
:
"+r"
(x));
38
return
x;
39
}
40
#endif
/* !AV_GCC_VERSION_AT_LEAST(4,1) */
41
42
#if !AV_GCC_VERSION_AT_LEAST(4,5)
43
#define av_bswap32 av_bswap32
44
static
av_always_inline
av_const
uint32_t
av_bswap32
(uint32_t x)
45
{
46
__asm__(
"bswap %0"
:
"+r"
(x));
47
return
x;
48
}
49
50
#if ARCH_X86_64
51
#define av_bswap64 av_bswap64
52
static
inline
uint64_t
av_const
av_bswap64
(uint64_t x)
53
{
54
__asm__(
"bswap %0"
:
"=r"
(x) :
"0"
(x));
55
return
x;
56
}
57
#endif
58
#endif
/* !AV_GCC_VERSION_AT_LEAST(4,5) */
59
60
#endif
/* HAVE_INLINE_ASM */
61
#endif
/* AVUTIL_X86_BSWAP_H */
av_const
#define av_const
Definition:
attributes.h:60
av_bswap16
#define av_bswap16
Definition:
bswap.h:31
attributes.h
Macro definitions for various function/variable attributes.
av_bswap32
#define av_bswap32
Definition:
bswap.h:33
av_bswap64
static uint64_t av_const av_bswap64(uint64_t x)
Definition:
bswap.h:75
av_always_inline
#define av_always_inline
Definition:
attributes.h:40
Generated on Sun Apr 23 2017 21:50:25 for Libav by
1.8.8