35 lines
1 KiB
Text
35 lines
1 KiB
Text
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This is a patched version of zlib, modified to use
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Pentium-Pro-optimized assembly code in the deflation algorithm. The
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files changed/added by this patch are:
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README.686
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match.S
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The speedup that this patch provides varies, depending on whether the
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compiler used to build the original version of zlib falls afoul of the
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PPro's speed traps. My own tests show a speedup of around 10-20% at
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the default compression level, and 20-30% using -9, against a version
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compiled using gcc 2.7.2.3. Your mileage may vary.
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Note that this code has been tailored for the PPro/PII in particular,
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and will not perform particuarly well on a Pentium.
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If you are using an assembler other than GNU as, you will have to
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translate match.S to use your assembler's syntax. (Have fun.)
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Brian Raiter
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breadbox@muppetlabs.com
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April, 1998
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Added for zlib 1.1.3:
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The patches come from
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http://www.muppetlabs.com/~breadbox/software/assembly.html
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To compile zlib with this asm file, copy match.S to the zlib directory
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then do:
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CFLAGS="-O3 -DASMV" ./configure
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make OBJA=match.o
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