highperfocused/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

use ff_fft_calc_3dn2 instead of sse on a K8.

Browse Source 
1.5% faster vorbis.

Originally committed as revision 6024 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt 2006-08-19 02:42:20 +00:00
parent 1e4ecf26f5
commit 652c59b967
1 changed files with 3 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
libavcodec/fft.c
View File

@ -68,17 +68,13 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
if (has_vectors & MM_3DNOWEXT) if (has_vectors & MM_3DNOWEXT)
s->imdct_calc = ff_imdct_calc_3dn2; s->imdct_calc = ff_imdct_calc_3dn2;
if (has_vectors & MM_3DNOWEXT) if (has_vectors & MM_3DNOWEXT)
/* 3DNowEx for Athlon(XP) */ /* 3DNowEx for K7/K8 */
s->fft_calc = ff_fft_calc_3dn2; s->fft_calc = ff_fft_calc_3dn2;
else if (has_vectors & MM_3DNOW) else if (has_vectors & MM_3DNOW)
/* 3DNow! for K6-2/3 */ /* 3DNow! for K6-2/3 */
s->fft_calc = ff_fft_calc_3dn; s->fft_calc = ff_fft_calc_3dn;
if (has_vectors & MM_SSE2) else if (has_vectors & MM_SSE)
/* SSE for P4/K8 */ /* SSE for P3/P4 */
s->fft_calc = ff_fft_calc_sse;
else if ((has_vectors & MM_SSE) &&
s->fft_calc == ff_fft_calc_c)
/* SSE for P3 */
s->fft_calc = ff_fft_calc_sse; s->fft_calc = ff_fft_calc_sse;
#else /* HAVE_MMX */ #else /* HAVE_MMX */
if (has_vectors & MM_ALTIVEC) if (has_vectors & MM_ALTIVEC)