On Thu, February 12, 2009 1:34 pm, Zhang Jun wrote: > thanks! > I'm new to gentoo, > I get the CFLAGS from gentoo-wiki( > http://en.gentoo-wiki.com/wiki/Safe_Cflags/AMD#Turion64_.2F_X2_.2F_Ultra > ) > and I am using 32bit linux. > > 2009/2/12 Joost Roeleveld <jo...@antarean.org>: >> On Thu, February 12, 2009 12:52 pm, Zhang Jun wrote: >>> Hi list, >>> >>> my laptop's cpu is AMD Turion64x2, I've installed both 32bits Debian >>> testing and Gentoo on it, >>> from Debian there is no SSE3 in /proc/cpuinfo, >>> and I used CFLAGS="-O2 -march=athlon-xp -fomit-frame-pointer -pipe" on >>> gentoo, and I can not see SSE3 in cpuinfo also, >>> >>> I emerged x86info, and SSE3 is in its output: >>> >>> #x86info >>> x86info v1.21. Dave Jones 2001-2007 >>> Feedback to <da...@redhat.com>. >>> >>> Found 2 CPUs >>> -------------------------------------------------------------------------- >> <snipped output> >> >>> my question is: I can not see SSE3 in cpuinfo because I did not use >>> "-msse3" in CFLAGS ? >> >> Hi, >> >> I would suspect that for your CPU using "-march=athlon-fx" would be more >> beneficial as your CPU has the x86_64 instruction set as well? >> >> -- >> Joost >>
Thank you for that link, I wasn't aware of it. Please, for future reference, try to avoid top-posting, it makes following conversations difficult. Try to keep your replies at the bottom of the email. According to that list, you need to add "-msse3" to your CFLAGS. Which makes sense as "-march=athlon-xp" is actually for an older CPU which didn't have sse3 support yet. -- Joost
