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Subject: Re: gcc versus intel c

Author: Dann Corbit

Date: 21:51:05 02/18/03

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On February 18, 2003 at 20:43:13, Sean Mintz wrote:

>Using the latest MingW32 available (gcc 3.2, for windows) I compiled tscp 1.73.
>A long time ago I had compiled 1.73 using intel c 5 with all optimizations and
>profiling and made the fastest executable for amd processors there was (you can
>even check the tscp benchmark site
>http://home.attbi.com/~tckerrigan/bench.html).
>
>Here's the results:
>
>Compiler   MIPS
>Intel C[1] 1452.4
>GCC[2]     1598.1
>
>1 - (Profile directed) icl *.c -O2 -Qipo -QxiM -G6 -Qunroll -Qprof_use
>-Qprof_dir c:\profiles
>
>2 - -O3 -march=athlon-mp -mcpu=athlon-mp -mfpmath=sse -mmmx -fomit-frame-pointer
>-funroll-loops -finline-functions -fprefetch-loop-arrays
>
>Those same options get 215knps with tscp 1.8. Intel gets 193knps...
>
>I'm on a dual athlon mp 1.2 ghz on a tyan tiger s2460 with 512 mb memory.

Here is a related post I made some time ago in the Winboard forum:
http://f11.parsimony.net/forum16635/messages/42054.htm




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