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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Free AMD Core Math Library (BLAS/LAPACK) + Ada
Date: Wed, 11 Jul 2012 22:39:43 +0100
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Date: 2012-07-11T22:39:43+01:00
List-Id: <comp.lang.ada>

Simon Wright <simon@pushface.org> writes:

> Well, with GNAT GPL 2012/GCC 4.7 you can't, because Generic_Real_Arrays
> has been rewritten in pure Ada (using Jacobi, which I gather is not
> known to be fast) in order not to use BLAS because of a feeling that
> some BLAS's might use an unacceptable numeric approximation. Personally
> I think this was daft.

Eigensystem, on a matrix of rank 250, took 0.07s with GCC 4.6 and 4.7s
with GCC 4.7.