Log of /xvidcore/src/motion/sad.c
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1.16 -
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Mon Apr 12 15:49:56 2004 UTC (20 years ago) by
edgomez
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CVS Tags:
release-1_1_0,
release-1_1_0_final,
release-1_1_1-final,
release-1_1_2,
release-1_1_3,
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Changes since
1.15: +26 -0 lines
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Optmized mem transfers, h263, plane sse
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1.13.2.8 -
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Thu Nov 13 23:11:24 2003 UTC (20 years, 5 months ago) by
edgomez
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dev-api-4
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MMXed the calculation of SSE for 8x8 16bit blocks. This helps quite
a lot VHQ=4 mode.
My tests show with trellis:chroma_me:
- ~20% speed improvement for vhq=4.
- at least 5% when using vhq=1.
Of course this speedup vanishes if more CPU intensive features are
used. CruNcher who used gmc/qpel, noticed "only" a ~5% speed
improvement.
NB: i'm of course talking about overall speed improvement. Such a
small patch for such a big improvement :-)
Revision
1.13.2.2 -
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Thu Apr 10 13:05:54 2003 UTC (21 years ago) by
edgomez
Branch:
dev-api-4
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1.13.2.1: +30 -28 lines
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2003-04-10 GMT Edouard Gomez <ed.gomez@free.fr> patch-14
Summary:
Removed all ABS() macros.
Revision:
xvidcore--devapi4--1.0--patch-14
All ABS macros have been replace with their stdlib.h/math.h
equivalent. This gives a 33% overall speedup for the plain C encoder,
while the ia32 one seems to suffer a small speed loss. However this
speed loss is very small and it seems it depends on the CPU type as
the abs/fabs usage is impacting badly on sad functions but impacting
well on interpolate functions ... weird inst'it ?
modified files:
src/bitstream/mbcoding.c src/global.h src/image/image.c
src/motion/motion_comp.c src/motion/motion_est.c
src/motion/sad.c src/prediction/mbprediction.c
src/utils/mbtransquant.c src/xvid.c
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