Mailinglist Archive: opensuse-factory (850 mails)

[Marc Collin <collinm@xxxxxxxxxxxxxxxx>]

Le mercredi 13 septembre 2006 15:59, Stephan Kulow a écrit :
> Am Mittwoch, 13. September 2006 20:57 schrieb Marc Collin:
> > minimum to be done: -march=x86-64
> >
> > i think x86 64 bits have minimum sse2
> >
> > -mfpmath=sse2
> >
> > -msse2
> > -funroll-all-loops
>
> Make sure you read http://funroll-loops.org/ - what exactly do you measure?
>

time to start, time to run function.....

when i created some program in C for a company i used often something similar 
to....

g++ -O2 -funroll-all-loops -fomit-frame-pointer -ffast-math -march=x86-64 -mfpmath=sse 
program_name.cpp -o program_name

i get about 10% faster then the standard syntax....

without change my code.....
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