Date: Fri, 22 Oct 1999 09:57:59 -0500 From: Dan Nelson <dnelson@emsphone.com> To: Stephen Roome <steveroo@mothra.bri.hp.com> Cc: Ville-Pertti Keinonen <will@iki.fi>, current@FreeBSD.ORG Subject: Re: Anyone adding "support" for Athlons. Message-ID: <19991022095759.A16787@dan.emsphone.com> In-Reply-To: <Pine.HPX.4.10.9910221153010.27283-100000@mothra.bri.hp.com>; from steveroo@mothra.bri.hp.com on Fri, Oct 22, 1999 at 12:00:05PM %2B0100 References: <86zoxd19yl.fsf@not.demophon.com> <Pine.HPX.4.10.9910221153010.27283-100000@mothra.bri.hp.com>
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In the last episode (Oct 22), Stephen Roome said: > The issues I was trying to raise were really about better > optimization for Athlons, and later generations of CPU's, as follows Optimization issues should be brought up on the egcs mailinglists, since that is the compiler we use. > 2) Alignment. By default if code is compiled without -m486 we end up > with different alignment strategies taken by gcc. Should the 386 > strategy still be the default ? (i.e. Should 386 still be considered > the expected hardware for FreeBSD) yes. Edit /etc/make.conf and add -march=i586 if you want to compile your machine with pentium-specific code. > 3) Use of SIMD instructions, (MMX and 3DNow!). Are these used by > anything ? Don't the MMX instructions stomp on the floating-point regs? -- Dan Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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