Date: Wed, 18 Jun 2003 10:44:17 -0400 From: Damian Gerow <damian@sentex.net> To: current@freebsd.org Subject: Re: VIA C3 Message-ID: <20030618144417.GD739@sentex.net> In-Reply-To: <mailman.1055688120.18605.fcurrent-l@lists.sentex.ca> References: <20030614013356.1388.qmail@web13503.mail.yahoo.com> <mailman.1055688120.18605.fcurrent-l@lists.sentex.ca>
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Thus spake Gerrit K?hn (gerrit@pmp.uni-hannover.de) [15/06/03 10:40]: > > CPU: VIA/IDT Unknown (998.70-MHz 686-class CPU) > > Origin = "CentaurHauls" Id = 0x689 Stepping = 9 > > Features=0x803035<FPU,DE,TSC,MSR,MTRR,PGE,MMX> > > This one doesn't seem to support SSE, though I wonder why there is > this "unknown". My C3 here is an Ezra and is identified as "Samuel2" > with id=067a. I have an Ezra or an Ezra-T core (the only difference is Tualatin <sp> compatibility), and it produces an Unknown. If you have a 'Samuel2' core, then you have a Samuel2 core. It's neither Ezra nor Ezra-T -- those two are the successors to Samuel2. > However, if you have a C3 without SSE, it's basically a K6 with MMX > and 3dNow. So I'm using "CPUTYPE=k6-3" in /etc/make.conf. Up to now > this has been working fine for me. I've been using CPUTYPE=i586/mmx. That's been working for me as well -- I'd be interested to see which is more optimized. Does your chip understand CMOV? GCC presumes that a 686-class processor has CMOV, and while the C3 /is/ a 686-class processor, it doesn't do CMOV. But I heard a rumor that the Samuel2 core /does/ do CMOV...
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