-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 [EMAIL PROTECTED] wrote: > Are any of these uncommon or dangerous: > > CFLAGS="-O2 -march=opteron -ffast-math -fomit-frame-pointer -mfpmath=sse > -funit- > at-a-time -fpeel-loops -ftracer -funswitch-loops -pipe"
I don't recommend -ffast-math on a global basis (or at all), it gets you right where the Pentium fdiv bug brought us some years ago: floating point operations will be faster, but they could get a wrong result in some occasions... -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFEiQuJ6q4f+IV6B/wRAi/dAJ9hef/hQ8ZJVWnPgkEyKSOReRO2jQCeM1FK SIkimKcsTbIUtfveycWmmGw= =Wa1X -----END PGP SIGNATURE----- -- gentoo-amd64@gentoo.org mailing list
