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Re: Matrix inverses are illegal on K6-2 ?

From: Dmitri A. Sergatskov
Subject: Re: Matrix inverses are illegal on K6-2 ?
Date: Sat, 10 Jun 2006 13:49:52 -0600

I suspect that atlas lib may have been optimized for i686 arch.
K6-2 does not implement entire i686 instruction set.
In any case this is question for *ubuntu packager.



On 6/10/06, Tom Williams <address@hidden> wrote:
atlas3-base 3.6.0-20 is installed. I checked on my other computer (on which
matrix inverses actually work, and that is all it has installed too).

What makes me think that it might be processor specific is that the same
method of installation on a different (and newer) computer resulted in a
system that actually works. For both computers I just used synaptic.

>From: Thomas Weber <address@hidden>
>To: address@hidden
>Subject: Re: Matrix inverses are illegal on K6-2 ?

>Date: Sat, 10 Jun 2006 21:15:59 +0200
>Am Samstag, den 10.06.2006, 12:08 -0600 schrieb Tom Williams:
> > Simple matrix operations like trace and transpose will work, but the
> > determinant or inverse of even a 2x2 matrix results in:
> >
> > panic: Illegal instruction -- stopping myself...
> > attempting to save variables to 'octave-core'...
> > save to 'octave-core' complete
>This sounds like a library problem. Which blas libraries (look for ATLAS
>in your package manager) are installed?
> > I'm just wondering if this is a processor issue, or if there is some way
> > can fix this.
>Did you compile Octave yourself? If not, file a bug in Xubuntu's bug
>tracking system.
>       Thomas
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