On Tue, Aug 29, 2006 at 08:56:36AM -0700, Christoph Lameter wrote:
> > Because i386 (and x86_64) can do better by using XADDL/XADDQ.
>
> And Ia64 would like to use fetchadd....
>
> > CMPXCHG is not available on all archs, and may not be implemented on all archs
> > through other atomic instructions.
>
> Which arches do not support cmpxchg?
MIPS, Alpha - probably any pure RISC load/store architecture.
Ralf
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