Date: Mon, 20 Dec 1999 20:10:00 +0100 From: Wilko Bulte <wilko@yedi.iaf.nl> To: freebsd-stable@FreeBSD.ORG Subject: Re: AMD 3DNow instructions on FreeBSD Message-ID: <19991220201000.A2302@yedi.iaf.nl> In-Reply-To: <199912201836.TAA27912@dorifer.heim3.tu-clausthal.de>; from olli@dorifer.heim3.tu-clausthal.de on Mon, Dec 20, 1999 at 07:36:31PM %2B0100 References: <199912201836.TAA27912@dorifer.heim3.tu-clausthal.de>
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On Mon, Dec 20, 1999 at 07:36:31PM +0100, Oliver Fromme wrote:
> Wilko Bulte wrote in list.freebsd-stable:
> > On Mon, Dec 20, 1999 at 06:26:48AM +0100, Oliver Fromme wrote:
> > [...]
> > > Well, when I added 3DNow support to the Seti@home client, I
> > > assembled the 3DNow instructions "manually", i.e. I created
> > > small gas macros for that purpose. It's ugly, but it works.
> >
> > Being the curious kind: what speed difference did you observe?
>
> About 50%, that is, about 4.5 hours (instead of 9) on average
> per work unit, on an Athlon-500. And I did only optimize the
> FFT and didn't touch the rest. With a bit more effort, further
> improvements would be certainly possible.
Wow! Quite a difference. Not having an Athlon but
CPU: AMD-K6(tm) 3D processor (399.81-MHz 586-class CPU)
Origin = "AuthenticAMD" Id = 0x58c Stepping = 12
AMD Features=0x80000800<SYSCALL,3DNow!>
would that also make such a difference on the K6-2? Athlon has
different 3Dnow I think ??
--
Wilko Bulte Arnhem, The Netherlands - The FreeBSD Project
WWW : http://www.tcja.nl http://www.freebsd.org
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