What is a difference between `-march=pentiumpro' and `-march=i686'?

Dmitry Antipov antipov@rosnet.ru
Wed Oct 25 01:02:00 GMT 2000


Hello all,

What is a difference between:
 `-march=pentiumpro' and `-march=i686' ?
 `-mcpu=pentiumpro' and `-mcpu=i686' ?
And what are best optimization options (for code speed, of course) 
flags for PIII and Athlon processors in gcc 2.95.2 ?

Thanks,
-- 
Dmitry Antipov <antipov@rosnet.ru>
Rosnet JSC +7 (095) 7558560 (4304)



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