[LAD] vectorization

[Malte Steiner]

Hello,

I try to squeeze as much performance as possible out of my upcomming 
Linux synthesizer and try manual vectorization with following construct 
in c, mainly to vectorize away multiplications :

typedef float v4sf __attribute__ ((vector_size(16)));

union f4vector
{
   v4sf v __attribute__((aligned (16)));
   float f[4] __attribute__((aligned (16)));
};

On AMD 64bit Turion (single core) on 64 Studio in 64bit mode this doesnt 
improve performance at all, actually it even get worse. Is GCC that good 
at optimizing on its own? I have no access to Intel processors at the 
moment but would love to know how to benefit from SIMD optimizations of 
float operations.
Sources on the web are rather thin...

Cheers,

Malte
-- 
Malte Steiner
media art + development
-www.block4.com-