In article <firstname.lastname@example.org> Raymond Toy <email@example.com> writes:
> But I do still think we when we compute estimates of costs, MIPS,
> cycles, whatever, we tend to ignore things like table lookups,
> additions, etc, and assume they are free, compared to multiplication,
> when in fact they can be even more expensive.
Well, if somebody does that he is wrong. There are very many processors
(and not only DSP's) where a floating point multiply takes as many
cycles as a floating point addition. Vector processors are of this
kind. And the first one I did use with this feature was a CDC Cyber,
back in the seventies.
dik t. winter, cwi, kruislaan 413, 1098 sj amsterdam, nederland, +31205924131
home: bovenover 215, 1025 jn amsterdam, nederland; http://www.cwi.nl/~dik/