Re: [gentoo-dev] The SIMD debacle

[Paul de Vrieze <pauldv@gentoo.org>]

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On Tuesday 30 September 2003 14:46, Jon Ellis wrote:
> Can someone explain the sse / 3dnow! situation to me?
>
> My understanding is that most modern intel and amd chips supprt sse,
> but only amd support 3dnow! Is this correct? Why would someone with a
> pentium 4 box have 3dnow in their use flags?
>

I think you are completely right, 3dnow in the useflags should be only done on 
amd systems that have 3dnow.

> Does anyone point me a ebuilds that correctly handle this stuff? It
> would be most useful to understand how protect users from themselves
> and reduce the number 'invalid instruction' bugs filed against
> libvorbis!

I think you might want to put in a check to test for actual 3dnow support. 
However it is perfectly legal to build a package on a p4 that is going to run 
on an athlon, so disabling the useflag might limit the users.

Paul

- -- 
Paul de Vrieze
Gentoo Developer
Mail: pauldv@gentoo.org
Homepage: http://www.devrieze.net
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