Hello GCC list: I am wondering if i have used -O, -O2 or -O3, do i still benifit from flags such as -march -fmpmath -ffast-math -mmx -sse -sse2 -3dnow?
I am optimizing a video codec and i see barely any performance difference whether i use just -O2 or "-ffast-math -march=athlon-xp -mmmx -msse -msse2 -m3dnow -mfpmath=sse,387 -O3". The codec is at http://www.sourceforge.net/projects/openavs/. Currently, it requires a 3Ghz or better CPU to get a resonable framerate. I would like the codec to be useful even on 586 ( 1Ghz or so ). Any ideas? Regards Lionel __________________________________________________________________ Switch to Netscape Internet Service. As low as $9.95 a month -- Sign up today at http://isp.netscape.com/register Netscape. Just the Net You Need. New! Netscape Toolbar for Internet Explorer Search from anywhere on the Web and block those annoying pop-ups. Download now at http://channels.netscape.com/ns/search/install.jsp
