1 /*
2 * linear least squares model
3 *
4 * Copyright (c) 2013 Loren Merritt
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "libavutil/lls.h"
24 #include "libavutil/x86/cpu.h"
25
26 void ff_update_lls_sse2(LLSModel *m, const double *var);
27 void ff_update_lls_avx(LLSModel *m, const double *var);
28 void ff_update_lls_fma3(LLSModel *m, const double *var);
29 double ff_evaluate_lls_sse2(LLSModel *m, const double *var, int order);
30
ff_init_lls_x86(LLSModel * m)31 av_cold void ff_init_lls_x86(LLSModel *m)
32 {
33 int cpu_flags = av_get_cpu_flags();
34 if (EXTERNAL_SSE2(cpu_flags)) {
35 m->update_lls = ff_update_lls_sse2;
36 if (m->indep_count >= 4)
37 m->evaluate_lls = ff_evaluate_lls_sse2;
38 }
39 if (EXTERNAL_AVX_FAST(cpu_flags)) {
40 m->update_lls = ff_update_lls_avx;
41 }
42 if (EXTERNAL_FMA3_FAST(cpu_flags)) {
43 m->update_lls = ff_update_lls_fma3;
44 }
45 }
46