Hi Norman, I haven't upgraded to gcc 3.3, I had planned on waiting until gcc 3.4 or even later. Can you give us an indication of what kind of performance benefit this can give?
Chris On Sun, 2003-08-10 at 06:24, Norman Vine wrote: > I upgraded my MingW compiler to gcc3.3 > and tried the following CFLAGS to use the sse multimedia > registers instead of the normal 387 fpu instructions > > -O2 -march=pentium3 -msse -mfpmath=sse > > Wow -- seems like a nice improvement in the fps :-) > > You will need a P3 or better for this > not exactly sure what the flags are for the AMD chips > but it's probably worth experimenting > > If you have a Pentium 4 try > -O2 -march=pentium4 -msse2 -mfpmath=sse2 > and this will do the same for doubles that sse does > for floats > > Note these compiler flags are present in earlier versions > of gcc but the code emitted had a few problems. It seems > as if 3.3 got things right at least for FGFS :-) > > Cheers > > Norman > > > > _______________________________________________ > Flightgear-devel mailing list > [EMAIL PROTECTED] > http://mail.flightgear.org/mailman/listinfo/flightgear-devel -- Christopher S Horler <[EMAIL PROTECTED]> _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
