Re: Mersenne: Thoughts on Merced / IA-64

[Anonymous]

> Do you?  I thought the only reason the FFT was using FP numbers was most
> current generation processors have a faster and higher precision FP multiply
> than fixed point.  With a 64*64 bit fixed point multiply that generates a
> higher precision result, you can quickly do exact fixed point multiplies of
> any length.

In an FFT you are multiplying by sines and cosines of binary fractions of a
circle, most of which are irrational numbers, so exact fixed point multiplies
are irrelevant for it.

phma
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