Paul Eggert wrote: > The Gnulib intprops module doesn't use asms and does not rely on undefined > behavior, > and I'd be surprised if it's significantly outperformed by the usual asms for > this particular task.
Yes. Already in 1999 I made the experience that, for a function that contained lots of integer multiplications (*), GCC (must have been egcs at that time) produced code that outperformed my hand-written assembly code by a few percent. And nowadays GCC does even more optimizations than 21 years ago. Bruno (*) The function did a Montgomery multiplication mod p, where p > 2^128; this is the workhorse of the arithmetic on an elliptic curve.
