Line data    Source code

       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           0 : av_cold void ff_fft_init_x86(FFTContext *s)
      26             : {
      27           0 :     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           0 :     if (EXTERNAL_SSE(cpu_flags)) {
      44             :         /* SSE for P3/P4/K8 */
      45           0 :         s->imdct_calc  = ff_imdct_calc_sse;
      46           0 :         s->imdct_half  = ff_imdct_half_sse;
      47           0 :         s->fft_permute = ff_fft_permute_sse;
      48           0 :         s->fft_calc    = ff_fft_calc_sse;
      49           0 :         s->fft_permutation = FF_FFT_PERM_SWAP_LSBS;
      50             :     }
      51           0 :     if (EXTERNAL_AVX(cpu_flags) && s->nbits >= 5) {
      52             :         /* AVX for SB */
      53           0 :         s->imdct_half      = ff_imdct_half_avx;
      54           0 :         s->fft_calc        = ff_fft_calc_avx;
      55           0 :         s->fft_permutation = FF_FFT_PERM_AVX;
      56             :     }
      57           0 : }