Christopher James Huff wrote:

> So it will only help operations on arrays then...seems like a stupid
> limitation. There isn't some compiler directive that could tell it what
> can be optimized?

SIMD only work on contignous blocks of memory.. so you're likely to use 
arrays when the're useful.

> 
> With a modern compiler, I wouldn't expect it to be much slower, but how
> could you get any improvement? The SIMD instructions can't handle double
> precision math as far as I know...they would help colors, but not
> vectors.

Yes, SSE can help for colour calculations. With it you can do operations on 
4 floats simutanously. But SSE2 (which pentium4 and 64-bit AMD support) 
will work on double precision! That's why I am looking for someone with a 
pentium4...

- Micha
 
-- 
http://objects.povworld.org - the POV-Ray Objects Collection

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