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> > I want to know if there is any difference in using -march=i686, > > -march=pentium3, -march=athlon, -march=athlon-xp or if they are all > > synonyms of -march=i686. > > They are not synonyms. P3 adds SSE1, Athlon has different > scheduling characteristics, etc. You also failed to mention P4, > but perhaps that was obvious. Yes, I did not mention P4 because it belongs to family 15. Where can I get a list of which parameter corresponds with each procesor. In the "AMD processor recognition application note" (#20734) There is no Athlon Tbird, and there is an option for that processor in the -march parameter. -- Ander Lozano Pérez ander1 at wanadoo dot es Desarrollador de DiaSCE http://diasce.es.gnome.org diasce at es dot gnome dot org irc.gnome.org #DiaSCE
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