mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.6 KiB
62 lines
1.6 KiB
16 years ago
|
/*
|
||
|
|
* 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)
|
||
|
|
{
|
||
|
|
#ifdef 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;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef 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 */
|