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Subject: Re: [boost] How to structurate libraries ?
From: Patrick Mihelich (patrick.mihelich_at_[hidden])
Date: 2009-01-19 18:10:02

On Mon, Jan 19, 2009 at 8:09 AM, Mathias Gaunard <
mathias.gaunard_at_[hidden]> wrote:

> Patrick Mihelich wrote:
>> uBlas doesn't do any explicit vectorization.
> Than that's an implementation issue.
> It could be solved by submitting a patch.

Well, that's a pretty glib statement. I wonder if you have any idea what
such a "patch" (I would say rewrite) would entail? Eigen2 was written from
the ground up around the packet concept, which allows it to portably
leverage SIMD instruction sets when available. uBlas I think would need to
be restructured similarly to take advantage of SSE, Altivec, etc. in a
manageable way. This is certainly doable, but there's a reason no one has
actually done it yet: writing SIMD-enabled code for multiple architectures
is currently really unpleasant.

A SIMD wrapper library would solve this unpleasantness, and IMO is a
prerequisite for a SIMD-accelerated uBlas.

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