Do C++ signed types have modulo semantics?

[Steven Bosscher]

On Tuesday 28 June 2005 14:02, Ulrich Weigand wrote:
> Steven Bosscher wrote:
> > Anyway, I've started a SPEC run with "-O2" vs. "-O2 -fwrapv".  Let's see
> > how big the damage would be ;-)
>
> Please make sure to include a 64-bit target, where it actually makes any
> difference.  (I recall performance degradations of 20-30% in some
> SPECfp cases from getting induction variable reduction wrong ...)

Yeah, I'm testing on an AMD64 box, both 64 bits and 32 bits.

Gr.
Steven