PeerStreamer

/*

 * 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 libavutil/x86/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 */