x86: check for AV_CPU_FLAG_AVXSLOW where useful
[libav.git] / libavcodec / x86 / dct_init.c
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 "config.h"
20 #include "libavutil/attributes.h"
21 #include "libavutil/cpu.h"
22 #include "libavutil/x86/cpu.h"
23 #include "libavcodec/dct.h"
24
25 void ff_dct32_float_sse(FFTSample *out, const FFTSample *in);
26 void ff_dct32_float_sse2(FFTSample *out, const FFTSample *in);
27 void ff_dct32_float_avx(FFTSample *out, const FFTSample *in);
28
29 av_cold void ff_dct_init_x86(DCTContext *s)
30 {
31 int cpu_flags = av_get_cpu_flags();
32
33 if (EXTERNAL_SSE(cpu_flags))
34 s->dct32 = ff_dct32_float_sse;
35 if (EXTERNAL_SSE2(cpu_flags))
36 s->dct32 = ff_dct32_float_sse2;
37 if (EXTERNAL_AVX_FAST(cpu_flags))
38 s->dct32 = ff_dct32_float_avx;
39 }