mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef AVUTIL_ARM_BSWAP_H
|
|
#define AVUTIL_ARM_BSWAP_H
|
|
|
|
#include <stdint.h>
|
|
#include "config.h"
|
|
#include "libavutil/attributes.h"
|
|
|
|
#ifdef __ARMCC_VERSION
|
|
|
|
#if HAVE_ARMV6
|
|
#define av_bswap16 av_bswap16
|
|
static av_always_inline av_const unsigned av_bswap16(unsigned x)
|
|
{
|
|
__asm { rev16 x, x }
|
|
return x;
|
|
}
|
|
|
|
#define av_bswap32 av_bswap32
|
|
static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
|
|
{
|
|
return __rev(x);
|
|
}
|
|
#endif /* HAVE_ARMV6 */
|
|
|
|
#elif HAVE_INLINE_ASM
|
|
|
|
#if HAVE_ARMV6
|
|
#define av_bswap16 av_bswap16
|
|
static av_always_inline av_const unsigned av_bswap16(unsigned x)
|
|
{
|
|
__asm__("rev16 %0, %0" : "+r"(x));
|
|
return x;
|
|
}
|
|
#endif
|
|
|
|
#define av_bswap32 av_bswap32
|
|
static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
|
|
{
|
|
#if HAVE_ARMV6
|
|
__asm__("rev %0, %0" : "+r"(x));
|
|
#else
|
|
uint32_t t;
|
|
__asm__ ("eor %1, %0, %0, ror #16 \n\t"
|
|
"bic %1, %1, #0xFF0000 \n\t"
|
|
"mov %0, %0, ror #8 \n\t"
|
|
"eor %0, %0, %1, lsr #8 \n\t"
|
|
: "+r"(x), "=&r"(t));
|
|
#endif /* HAVE_ARMV6 */
|
|
return x;
|
|
}
|
|
|
|
#endif /* __ARMCC_VERSION */
|
|
|
|
#endif /* AVUTIL_ARM_BSWAP_H */
|