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/libavutil/bfin/bswap.h

http://github.com/FFmpeg/FFmpeg
C Header | 45 lines | 17 code | 5 blank | 23 comment | 0 complexity | 50452f0eeea64822a1d2a2716e4aeca7 MD5 | raw file
 1/*
 2 * Copyright (C) 2007 Marc Hoffman
 3 *
 4 * This file is part of FFmpeg.
 5 *
 6 * FFmpeg is free software; you can redistribute it and/or
 7 * modify it under the terms of the GNU Lesser General Public
 8 * License as published by the Free Software Foundation; either
 9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * byte swapping routines
24 */
25
26#ifndef AVUTIL_BFIN_BSWAP_H
27#define AVUTIL_BFIN_BSWAP_H
28
29#include <stdint.h>
30#include "config.h"
31#include "libavutil/attributes.h"
32
33#define av_bswap32 av_bswap32
34static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
35{
36    unsigned tmp;
37    __asm__("%1 = %0 >> 8 (V);      \n\t"
38            "%0 = %0 << 8 (V);      \n\t"
39            "%0 = %0 | %1;          \n\t"
40            "%0 = PACK(%0.L, %0.H); \n\t"
41            : "+d"(x), "=&d"(tmp));
42    return x;
43}
44
45#endif /* AVUTIL_BFIN_BSWAP_H */