FFmpeg
bswap.h
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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
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 */
#define av_const
Definition: attributes.h:76
Macro definitions for various function/variable attributes.
#define av_bswap32
Definition: bswap.h:33
#define av_always_inline
Definition: attributes.h:39
static uint8_t tmp[11]
Definition: aes_ctr.c:26