fft.c
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1 /*
2  * This file is part of Libav.
3  *
4  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "libavutil/cpu.h"
20 #include "libavcodec/dsputil.h"
21 #include "libavcodec/dct.h"
22 #include "fft.h"
23 
25 {
26 #if HAVE_YASM
27  int has_vectors = av_get_cpu_flags();
28  if (has_vectors & AV_CPU_FLAG_AVX && HAVE_AVX && s->nbits >= 5) {
29  /* AVX for SB */
35  } else if (has_vectors & AV_CPU_FLAG_SSE && HAVE_SSE) {
36  /* SSE for P3/P4/K8 */
42  } else if (has_vectors & AV_CPU_FLAG_3DNOWEXT && HAVE_AMD3DNOWEXT) {
43  /* 3DNowEx for K7 */
47  } else if (has_vectors & AV_CPU_FLAG_3DNOW && HAVE_AMD3DNOW) {
48  /* 3DNow! for K6-2/3 */
52  }
53 #endif
54 }
55 
56 #if CONFIG_DCT
58 {
59 #if HAVE_YASM
60  int has_vectors = av_get_cpu_flags();
61  if (has_vectors & AV_CPU_FLAG_AVX && HAVE_AVX)
63  else if (has_vectors & AV_CPU_FLAG_SSE2 && HAVE_SSE)
65  else if (has_vectors & AV_CPU_FLAG_SSE && HAVE_SSE)
67 #endif
68 }
69 #endif
70