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

 */

#ifndef AVUTIL_ARM_BSWAP_H

#define AVUTIL_ARM_BSWAP_H

#include <stdint.h>

#include "config.h"

#include "libavutil/common.h"

#ifdef __ARMCC_VERSION

#if HAVE_ARMV6

#define bswap_16 bswap_16

static av_always_inline av_const uint16_t bswap_16(uint16_t x)

{

    __asm { rev16 x, x }

    return x;

}

#define bswap_32 bswap_32

static av_always_inline av_const uint32_t bswap_32(uint32_t x)

{

    return __rev(x);

}

#endif /* HAVE_ARMV6 */

#elif HAVE_INLINE_ASM

#if 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)

{

#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 */