Spider wrote:

> theese numbers were quite interesting, could you please run one more?
> Try CFLAGS="-march=athlon-xp -O3 -finline-functions -ffast-math
> -foptimize-sibling-calls  -ansi -march=i686 -DCPU=686" for the  athlon-xp
>  and see if it differs some or more from the output with march=i686
 
> antoher thing to be tested would be -mfpmath="sse,387" which will attempt

> also, since we're not using debugging here, it should be considered to use
> -fomit-frame-pointer on gcc, thus freeing up another register, not always
> desirable or noticeable in desktop applications, but this is a "special
> case" so it should be ok :)

Good points, at least the running time says so:
Running time in seconds:

gcc 2.95.3 7048s
gcc 3.0.1  6574s
gcc 3.1    5908s
gcc 3.1    5749s (new options)
icc 6      5699s

For the records: It's a AMD Athlon(TM) XP 1500+ (1343.051 MHz)
running SuSE Linux with kernel 2.4.10-4GB

Compiling options were:
gcc 2.95.3  
 -O3 -finline-functions -ffast-math -ansi -march=i686 -DCPU=686
gcc 3.0.1   
 -O3 -finline-functions -ffast-math -foptimize-sibling-calls -ansi 
 -march=i686 -DCPU=686
gcc 3.1     
 -O3 -finline-functions -ffast-math -foptimize-sibling-calls
 -ansi -march=i686 -DCPU=686
gcc 3.1 (new options)
 -march=athlon-xp -O3 -finline-functions -ffast-math 
-foptimize-sibling-calls
 -DCPU=686 -mfpmath="sse,387" -fomit-frame-pointer
icc 6       
 -O3 -tpp6  -xK -unroll -ip

Best regards 
Thomas

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