Speex dev - Apr 2005 - Speex for the Intel XScale with WMMX.

I work with the Microsoft Embedded Visual C++, and i don't have a linux 
machine with me. I need to have the best performance  in order to run my 
application for the Intel XSCale with MMX. I don't know if i can compile 
for this processor with the best performance using the Microsoft 
compiler. I would like a help regarding how to get or build this .obj.
Thank you.

Cesar Bremer Pinheiro
Bremer Serv. Emp. Ltda.
BRAZIL
http://www.raseac.com.br

Hi,

I'm not even sure what WMMX is, so I have no idea how to use it. For
sure you would at least need to write some assembly. As for the current
inline assembly parts (for the ARMv4 arch), you would need to convert
them to VC++. It shouldn't be too hard, just push/load the registers at
the beginning and then save/pop at the end. It's just the small macros
(in fixed_arm4.h) that you won't be able to use because with VC++ inline
assembly, the overhead will be larger than the benefit.

	Jean-Marc

Le vendredi 01 avril 2005 ? 17:29 -0300, cesarbremer@raseac.com.br a
?crit :
> I work with the Microsoft Embedded Visual C++, and i don't have a linux
> machine with me. I need to have the best performance  in order to run my 
> application for the Intel XSCale with MMX. I don't know if i can
compile
> for this processor with the best performance using the Microsoft 
> compiler. I would like a help regarding how to get or build this .obj.
> Thank you.
> 
> Cesar Bremer Pinheiro
> Bremer Serv. Emp. Ltda.
> BRAZIL
> http://www.raseac.com.br
> _______________________________________________
> Speex-dev mailing list
> Speex-dev@xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev
> 
-- 
Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca>
Universit? de Sherbrooke

Jean-Marc,

At 08:12 PM 4/1/2005, Jean-Marc Valin wrote:
>I'm not even sure what WMMX is,
This is just a short name for the MMX/SSE extensions/intrinsic
functions for the intel XSCALE processors.  Most of the WMMX
instructions have MMX/SSE equivalents, plus there are a few
other interesting functions.  We have been thinking about doing
WMMX optimizations of the various speex asm functions, but
just haven't gotten to it yet...

Tom