On Sat, Apr 26, 2014, Dongsheng Song wrote: > On Sat, Apr 26, 2014 at 12:31 AM, Adrien Nader <[email protected]> wrote: > > I believe --with-arch=core2 is a big issue for generic toolchains. It > > will create troubles which will be very annoying to pinpoint. > > > > Any x86_64/amd64/EM64T (I love how Intel always makes up awful names) > > already has SSE2 and there is little value in restricting this except in > > very specific situation which are better dealt on a case-by-case basis. > > > > Regards, > > Adrien Nader > > > > Do you really meet this issue ? I can not image someone still running > 64 bit Windows on such old CPU. > > Intel core2 release in July 2006, shutdown in January 2010. > http://en.wikipedia.org/wiki/Intel_Core_2
I have troubles believing people still run XP but many do. :P The issue is rather when you look at the AMD CPUs. First models with SSE3 are from the end of 2007 (meaning you would still easily see machines with them at the end of 2008, even beginning of 2009). The real issue is with SSSE3 (one more 'S') since the first mobile CPUs with it have been released beginning of 2011 and the first desktop CPUs with it have been released end of 2011 are are still easily found. I have a machine without SSE3 in my living room (albeit it needs a new PSU), along with a machine without SSSE3 which is definitely running strong (in particular since the rate of CPU speed improvement has dramatically slowed down in the last few years). I don't think there is a point in making core2 the default; I don't think it will bring any improvements except when building multimedia stuff and even then it's not unlikely they don't provide hand-tuned assembly but even then, -mtune should do be able to bring the performance benefits on the newer CPUs while still running on the older ones. -- Adrien Nader ------------------------------------------------------------------------------ Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
