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add SSE2 functions. ~2x faster encoding on average.

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For now, SSE2 functions are compiled a-minima: only on platforms
where __SSE2__ is defined. Let's later add some autoconf-based
config to enable/disable at will.

One can disable SSE2 at run-time by hooking-up VP8GetInfo.
There is a new option "-noasm" in cwebp for that.
Output should be binary the same between C and SSE2 version. If not,
that's a bug!

patch by Christian Duvivier (cduvivier at google dot com)

Change-Id: Iae006c3cdcb7e8280e846cedb94d239dab1e42ae
This commit is contained in:
Pascal Massimino
2011-04-22 12:14:45 -07:00
parent e7ff3f9af6
commit cfbf88a6c4
7 changed files with 680 additions and 31 deletions
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3
makefile.unix
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@ -46,7 +46,8 @@ CFLAGS = -O3 -DNDEBUG $(EXTRA_FLAGS)
LDFLAGS = src/libwebp.a $(EXTRA_LIBS) -lm
OBJS = src/enc/webpenc.o src/enc/bit_writer.o src/enc/syntax.o \
src/enc/dsp.o src/enc/tree.o src/enc/config.o src/enc/frame.o \
src/enc/dsp.o src/enc/dsp_sse2.o \
src/enc/tree.o src/enc/config.o src/enc/frame.o \
src/enc/quant.o src/enc/iterator.o src/enc/analysis.o \
src/enc/cost.o src/enc/picture.o src/enc/filter.o \
src/dec/bits.o src/dec/dsp.o src/dec/frame.o src/dec/webp.o \