From 652c59b967d7bbcc3322ba4f5c8c0bfe02794a25 Mon Sep 17 00:00:00 2001
From: Loren Merritt <lorenm@u.washington.edu>
Date: Sat, 19 Aug 2006 02:42:20 +0000
Subject: [PATCH] use ff_fft_calc_3dn2 instead of sse on a K8. 1.5% faster
vorbis.
Originally committed as revision 6024 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/fft.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/libavcodec/fft.c b/libavcodec/fft.c
index bc514724c0a..7716dd2e5ee 100644
--- a/libavcodec/fft.c
+++ b/libavcodec/fft.c
@@ -68,17 +68,13 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
if (has_vectors & MM_3DNOWEXT)
s->imdct_calc = ff_imdct_calc_3dn2;
if (has_vectors & MM_3DNOWEXT)
- /* 3DNowEx for Athlon(XP) */
+ /* 3DNowEx for K7/K8 */
s->fft_calc = ff_fft_calc_3dn2;
else if (has_vectors & MM_3DNOW)
/* 3DNow! for K6-2/3 */
s->fft_calc = ff_fft_calc_3dn;
- if (has_vectors & MM_SSE2)
- /* SSE for P4/K8 */
- s->fft_calc = ff_fft_calc_sse;
- else if ((has_vectors & MM_SSE) &&
- s->fft_calc == ff_fft_calc_c)
- /* SSE for P3 */
+ else if (has_vectors & MM_SSE)
+ /* SSE for P3/P4 */
s->fft_calc = ff_fft_calc_sse;
#else /* HAVE_MMX */
if (has_vectors & MM_ALTIVEC)
--
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