x86: check for AV_CPU_FLAG_AVXSLOW where useful
[libav.git] / libavcodec / x86 / fft_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 "fft.h"
24
25 av_cold void ff_fft_init_x86(FFTContext *s)
26 {
27 int cpu_flags = av_get_cpu_flags();
28
29 #if ARCH_X86_32
30 if (EXTERNAL_AMD3DNOW(cpu_flags)) {
31 /* 3DNow! for K6-2/3 */
32 s->imdct_calc = ff_imdct_calc_3dnow;
33 s->imdct_half = ff_imdct_half_3dnow;
34 s->fft_calc = ff_fft_calc_3dnow;
35 }
36 if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) {
37 /* 3DNowEx for K7 */
38 s->imdct_calc = ff_imdct_calc_3dnowext;
39 s->imdct_half = ff_imdct_half_3dnowext;
40 s->fft_calc = ff_fft_calc_3dnowext;
41 }
42 #endif
43 if (EXTERNAL_SSE(cpu_flags)) {
44 /* SSE for P3/P4/K8 */
45 s->imdct_calc = ff_imdct_calc_sse;
46 s->imdct_half = ff_imdct_half_sse;
47 s->fft_permute = ff_fft_permute_sse;
48 s->fft_calc = ff_fft_calc_sse;
49 s->fft_permutation = FF_FFT_PERM_SWAP_LSBS;
50 }
51 if (EXTERNAL_AVX_FAST(cpu_flags) && s->nbits >= 5) {
52 /* AVX for SB */
53 s->imdct_half = ff_imdct_half_avx;
54 s->fft_calc = ff_fft_calc_avx;
55 s->fft_permutation = FF_FFT_PERM_AVX;
56 }
57 }