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
av_bswap32(uint32_t x)34 static 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 */
46