Re: [eigen] Issues regarding Quaternion-alignment and const Maps

[Christoph Hertzberg <chtz@xxxxxxxxxxxxxxxxxxxxxxxx>]

Benoit Jacob wrote:
> Wow, very good work.
>
> I indeed confirm the 2x speed improvement, and once i moved your
> benchmarking code to a non-inlinable function called from main(), it
> even got a bit higher (indeed GCC fails to optimize correctly code in
> the main() function).
>
> Could you make a patch against the development branch? (We're not
> going to add features to 2.0 at this point).

I think I can do that, but most likely not before Monday/Tuesday.

> http://eigen.tuxfamily.org/index.php?title=Developer%27s_Corner#Generating_a_patch
>
> Also, I didn't know about that loaddup instruction in SSE3. It's
> great! I'll have a look at using it in ei_pset1 when SSE3 is
> available.

It's actually a pity that there is no complete list with *just* all 
SSE-instructions (not mixed with every other x86-instruction), including 
a short description, maybe a usage example, and intrinsics for some 
common compilers. At least I did't find any ...


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Dipl.-Inf. Christoph Hertzberg
Cartesium 0.051
Universität Bremen
Enrique-Schmidt-Straße 5
28359 Bremen

Tel: (+49) 421-218-64252
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