--- Comment #2 from pluto at agmk dot net 2007-03-14 19:05 ---
(In reply to comment #1)
> ifcvt could do this. But is cmpxchgq really faster with its atomictiy
> guarantee?
only `lock; cmpxchg' has atomicity guarantee on smp.
> They are all vector-path instructions, a compare - cmov s
--- Comment #1 from rguenth at gcc dot gnu dot org 2007-03-14 11:00 ---
ifcvt could do this. But is cmpxchgq really faster with its atomictiy
guarantee?
They are all vector-path instructions, a compare - cmov sequence looks
faster (8 cycle latency vs. 10 and also with less constraints o
