I am trying to identify the most useful optimization flags in the GCC/MingW environment for systems using the Athlon-XP processor. I am compiling versions of the Firefox browser, along with some other software, specifically for this cpu and want to make it run as fast as possible. Right now I am using the following optimization flags: -march=athlon-xp -mfpmath=387 -ftracer -fforce-addr -O2 -s -pipe These work very well, but the end products are not as fast as version built from within MS VC++ ( .NET Studio Pro ). Note I am not using SSE instruction set as I have found that it actually SLOWS the software I compile. What other optimization flags, if any, do you recommend for Athlon-XPs?
