On Tuesday, 03 February 2009 at 22:08, Josh Boyer wrote: > On Tue, Feb 03, 2009 at 09:57:40PM +0100, Dominik 'Rathann' Mierzejewski wrote: > >On Tuesday, 03 February 2009 at 21:52, Josh Boyer wrote: > >> On Tue, Feb 03, 2009 at 09:45:46PM +0100, Dominik 'Rathann' Mierzejewski wrote: > >[...] > >> >Well, I talk to people who write hand-optimized assembly and care to > >> >squeeze every cycle out of various CPUs and they say it's definitely > >> >a win. So please, show me some code instead of hand-waving. > >> > >> If they can do that, then why can't they rebuild things themselves? > > > >Oh, right. Let's all use LFS or Gentoo. > >Why can't everyone rebuild things themselves? > > They can. > > Look, it's very simple. Fedora _cannot_ be everything to everyone. There > are too many variations, optimizations, etc. So, in light of that, it > tries to fit the best usecase. The common ground. > > People that hand code assembly files are _not_ the common users of Fedora. I know. I'm just saying Ulrich's statement about "cmov not being a win" is not convincing without some code samples. I, on the other hand, can point you to x264 cabac asm code, which uses cmov to attain 8%(p4) to 25%(core2) speedups. Regards, R. -- Fedora http://fedoraproject.org/wiki/User:Rathann RPMFusion http://rpmfusion.org | MPlayer http://mplayerhq.hu "Faith manages." -- Delenn to Lennier in Babylon 5:"Confessions and Lamentations" -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
