2
* This file is part of FFmpeg.
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.
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.
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
19
#include "libavcodec/dsputil.h"
22
av_cold void ff_fft_init_mmx(FFTContext *s)
25
int has_vectors = mm_support();
26
if (has_vectors & FF_MM_SSE && HAVE_SSE) {
27
/* SSE for P3/P4/K8 */
28
s->imdct_calc = ff_imdct_calc_sse;
29
s->imdct_half = ff_imdct_half_sse;
30
s->fft_permute = ff_fft_permute_sse;
31
s->fft_calc = ff_fft_calc_sse;
32
} else if (has_vectors & FF_MM_3DNOWEXT && HAVE_AMD3DNOWEXT) {
34
s->imdct_calc = ff_imdct_calc_3dn2;
35
s->imdct_half = ff_imdct_half_3dn2;
36
s->fft_calc = ff_fft_calc_3dn2;
37
} else if (has_vectors & FF_MM_3DNOW && HAVE_AMD3DNOW) {
38
/* 3DNow! for K6-2/3 */
39
s->imdct_calc = ff_imdct_calc_3dn;
40
s->imdct_half = ff_imdct_half_3dn;
41
s->fft_calc = ff_fft_calc_3dn;