/src/ffmpeg/libavutil/emms.h
Line | Count | 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 | 0 | # 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 | | static av_always_inline void emms_c(void) |
43 | 0 | { |
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 | 0 | __asm__ volatile ("emms" ::: "memory"); |
52 | 0 | } Unexecuted instantiation: swscale.c:emms_c Unexecuted instantiation: utils.c:emms_c Unexecuted instantiation: avcodec.c:emms_c Unexecuted instantiation: decode.c:emms_c Unexecuted instantiation: encode.c:emms_c |
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 */ |