Robert Dewar <[EMAIL PROTECTED]> writes: > > I must say I am a bit surprised that gcc never takes advantage > of the fact that inc and dec do not destroy the carry flag, this > is quite significant for some loops.
A lot of this old wisdom is no longer true. inc and dec are to be generally avoided these days, because the partial changing of EFLAGS causes too strict dependencies on Intel P4 cores and threefore slower execution. It's better to use add/sub $1,... instead, except if you're optimizing for code size. -Andi
