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/*
* 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/common.h"
#ifdef HAVE_ARMV6
#define bswap_16 bswap_16
static av_always_inline av_const uint16_t bswap_16(uint16_t x)
{
__asm__("rev16 %0, %0" : "+r"(x));
return x;
}
#endif
#define bswap_32 bswap_32
static av_always_inline av_const uint32_t bswap_32(uint32_t x)
{
#ifdef 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 /* AVUTIL_ARM_BSWAP_H */
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