[speex-dev] SmartPhone ARM

[Greg Cockroft]

I don't think a compiler is going to be enough.
I tried perl scripting the output of a linux gcc cross-compiler to convert
into something the assembler under eVC would consume.
It errors on all the MAC type of instructions.  I looked at www.arm.com (I
never knew there could be so many arms)
It does not look like the ARM720 has the MAC instructions.  It also lists
75Mhz and 100Mhz as possible frequencies.
(I'm still hoping for 100 :-)

I have started to look at reducing complexity by removing all perceptual
filters in the encoder.
It sounds ugly but my fallback is GSM 610.

I'm open to any other ideas to cut CPU at the expense of quality.

            -greg.

<p>----- Original Message ----- 
From: "Bjoern Rasmussen" <bjoern_rasmussen at hotmail.com>
To: <speex-dev at xiph.org>
Sent: Thursday, December 18, 2003 5:19 PM
Subject: RE: [speex-dev] SmartPhone ARM

<p>> Hello Greg
>
> If money isn't a problem Intel has an optimized compiler for eVC and
XScale
> processors
>
>
http://www.intel.com/software/products/compilers/techtopics/PCA_Optimization_WP.pdf
>
> If you have any luck getting the eVC compiler closer to realtime I'd
really
> like to know. I'm still far from realtime when using Speex 1.1.3 on a HP
> iPAQ (Intel pxa255).
>
> Best regards
>
> Bjoern D. Rasmussen
>
>
> >From: "Greg Cockroft" <greg at agog.com>
> >Reply-To: speex-dev at xiph.org
> >To: <speex-dev at xiph.org>
> >Subject: [speex-dev] SmartPhone ARM
> >Date: Wed, 17 Dec 2003 14:14:19 -0500
> >
> >Target is Spv & Nokia phones ARM and also ipaq ARM.
> >
> >With the generic fixed point at complexity 0 I am still about 1.6x
realtime
> >for narrowband.
> >
> >The MS eVC compiler does not support inline assembler, only separate
> >assembler functions.
> >
> >Does anyone have a feeling on whether a 2x speedup is possible if I hand
> >tune a few functions?
> >
> >           -greg.
> >
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