Who coded IPP?

[ergin]

I would like to know how IPP routines are coded.

I am especially interested in the FFT routine.

The reason is FFT consists of mainly complex multiplications.

My experience with Intel C++ compiler is that it cannot vectorize

complex operations properly.

The performance level of FFT on a 2.8C GHz P4 is about 6GFlops.

Now it is impossible that this CPU reaches that performance without full vectorization.

Since the Intel C++ compiler cannot vectorize this code efficiently, I conclude that IPP FFT is coded in assembly.

Can somebody confirm this?

If yes do we have access to the FFT code?

Thanks.

[Vladimir_Dudnik]

Hi,

You are right, we have good implementation of FFT in IPP. It was written by hand, usingassembler.

Currently our policy is not to provide IPP sources.

Regards,

Vladimir