Date: Tue, 2 Nov 1999 02:28:40 +0100 (CET) From: Oliver Fromme <olli@dorifer.heim3.tu-clausthal.de> To: freebsd-questions@FreeBSD.ORG Subject: Re: Athlons.. Message-ID: <199911020128.CAA26722@dorifer.heim3.tu-clausthal.de>
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Stephen Roome wrote in list.freebsd-questions:
> Does anyone know if the following example, taken from AMD's documentation,
> would improve bcopy performance on the Athlon? (over the routine that would be
> defaulted to ?)
This _might_ improve performance when copying very large
regions. However, the problem is, that movq (which is an
MMX instruction) clobbers the FPU registers, which is a
bad thing.
Regards
Oliver
--
Oliver Fromme, Leibnizstr. 18/61, 38678 Clausthal, Germany
(Info: finger userinfo:olli@dorifer.heim3.tu-clausthal.de)
"In jedem Stück Kohle wartet ein Diamant auf seine Geburt"
(Terry Pratchett)
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