Floating point DSP with GPL toolchain

Hi all,

For a project, I need to use a DSP with floating point
capbilities, using a GPL toolchain.

A good DSP with all the feature I need would be the
ADSP 21262, but the GPL toolchain has not a
complete support of his features, and it would a pity
to underuse it!

Does anyone has experience in using a floating
point DSP with GPL developing environment on 
Linux?

thanks
giammy

giangiammy wrote:
> Hi all,
> 
> For a project, I need to use a DSP with floating point
> capbilities, using a GPL toolchain.
> 
> A good DSP with all the feature I need would be the
> ADSP 21262, but the GPL toolchain has not a
> complete support of his features, and it would a pity
> to underuse it!
> 
> Does anyone has experience in using a floating
> point DSP with GPL developing environment on 
> Linux?
> 

Again, if you want to take advantage of SIMD, you should use assembly. 
I typically write C-callable assembly functions when I need the speed, 
GPL or otherwise.

You get the best of both worlds this way.  C for control and complicated 
general-purpose stuff, and assembly for processing samples (my asm 
functions always work on a block of samples rather than on a single 
sample).  So instead of this:

for(i=0; i<SIZE; i++)
{
   *out++ = asm_function(*in++);
}

I write

asm_function(out, in, SIZE);

It's not that hard to write the asm functions.

-- 
Jim Thomas            Principal Applications Engineer  Bittware, Inc
jthomas@bittware.com  http://www.bittware.com    (603) 226-0404 x536
When you know how things work, the world is one big sandbox.  - Avins