Line |
Branch |
Exec |
Source |
1 |
|
|
/* |
2 |
|
|
* This file is part of FFmpeg. |
3 |
|
|
* |
4 |
|
|
* FFmpeg is free software; you can redistribute it and/or |
5 |
|
|
* modify it under the terms of the GNU Lesser General Public |
6 |
|
|
* License as published by the Free Software Foundation; either |
7 |
|
|
* version 2.1 of the License, or (at your option) any later version. |
8 |
|
|
* |
9 |
|
|
* FFmpeg is distributed in the hope that it will be useful, |
10 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 |
|
|
* Lesser General Public License for more details. |
13 |
|
|
* |
14 |
|
|
* You should have received a copy of the GNU Lesser General Public |
15 |
|
|
* License along with FFmpeg; if not, write to the Free Software |
16 |
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
17 |
|
|
*/ |
18 |
|
|
|
19 |
|
|
#ifndef AVUTIL_EMMS_H |
20 |
|
|
#define AVUTIL_EMMS_H |
21 |
|
|
|
22 |
|
|
#include "config.h" |
23 |
|
|
#include "libavutil/attributes.h" |
24 |
|
|
|
25 |
|
|
#if ARCH_X86 |
26 |
|
|
|
27 |
|
|
void avpriv_emms_asm(void); |
28 |
|
|
|
29 |
|
|
#if HAVE_MMX_INLINE |
30 |
|
|
#ifndef __MMX__ |
31 |
|
|
#include "libavutil/cpu.h" |
32 |
|
|
#endif |
33 |
|
|
|
34 |
|
|
# define emms_c emms_c |
35 |
|
|
/** |
36 |
|
|
* Empty mmx state. |
37 |
|
|
* this must be called between any dsp function and float/double code. |
38 |
|
|
* for example sin(); dsp->idct_put(); emms_c(); cos() |
39 |
|
|
* Note, *alloc() and *free() also use float code in some libc implementations |
40 |
|
|
* thus this also applies to them or any function using them. |
41 |
|
|
*/ |
42 |
|
2839476 |
static av_always_inline void emms_c(void) |
43 |
|
|
{ |
44 |
|
|
/* Some inlined functions may also use mmx instructions regardless of |
45 |
|
|
* runtime cpuflags. With that in mind, we unconditionally empty the |
46 |
|
|
* mmx state if the target cpu chosen at configure time supports it. |
47 |
|
|
*/ |
48 |
|
|
#if !defined(__MMX__) |
49 |
|
|
if(av_get_cpu_flags() & AV_CPU_FLAG_MMX) |
50 |
|
|
#endif |
51 |
|
2839476 |
__asm__ volatile ("emms" ::: "memory"); |
52 |
|
2839476 |
} |
53 |
|
|
#elif HAVE_MMX && HAVE_MM_EMPTY |
54 |
|
|
# include <mmintrin.h> |
55 |
|
|
# define emms_c _mm_empty |
56 |
|
|
#elif HAVE_MMX_EXTERNAL |
57 |
|
|
# define emms_c avpriv_emms_asm |
58 |
|
|
#endif /* HAVE_MMX_INLINE */ |
59 |
|
|
|
60 |
|
|
#endif /* ARCH_X86 */ |
61 |
|
|
|
62 |
|
|
#ifndef emms_c |
63 |
|
|
# define emms_c() do {} while(0) |
64 |
|
|
#endif |
65 |
|
|
|
66 |
|
|
#endif /* AVUTIL_EMMS_H */ |
67 |
|
|
|