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Re: atlas3-base vs atlas3-sse2


From: Keith Goodman
Subject: Re: atlas3-base vs atlas3-sse2
Date: Tue, 4 Apr 2006 09:57:47 -0700

On 4/3/06, Quentin Spencer <address@hidden> wrote:
> I didn't know you meant amd64. At
> http://packages.debian.org/unstable/libs/atlas3-base, it seems to
> indicate that there is a atlas-base package is compiled specifically for
> amd64.  The reason that there are some atlas-* packages is for
> extensions of a specific architecture; amd64 is regarded as its own
> architecture and therefore gets its own atlas3-base package. This is
> also true of Fedora, where the package is a atlas-<version>.x86_64.rpm

I am using atlas3-base on amd64. But from the Debian package
description there is no support for sse2 in atlas3-base:

"The libraries in this package are built without any processor extension
instructions, and should run on all processors of this general
architecture, albeit less than optimally.

On some architectures, multiple binary packages are provided to take
advantage of certain commonly available processor instruction set
extensions.  The instruction extension set used is indicated in the
package name, with 'base' denoting no extensions. In general, you
will obtain the best performance by installing the package with the
most advanced instruction extension set your machine is capable of
running."



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