RE: Why does ia64 not use fetchadd in atomic.h?

From: Chen, Kenneth W <kenneth.w.chen_at_intel.com>
Date: 2006-06-16 07:39:16
Christoph Lameter wrote on Thursday, June 15, 2006 2:29 PM
> > On Thu, Jun 15, 2006 at 01:35:42PM -0700, Christoph Lameter wrote:
> > > Why not
> > > 
> > > #define ia64_atomic_add(__i, __v) ia64_fetchadd(__i, &v->counter, acq)
> > 
> > Because ia64_fetchadd() only supports 8 different constants?
> 
> Right. I forgot about that. Only a call to atomic_add does the fetchadd 
> trickery. Thanks.


I guess I got confused, are you complaining about ia64_atomic_add or
ia64_atomic64_add?  If the former, there is not much can be done, but if
the latter, yeah, it can be optimized for certain constant.

-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Received on Fri Jun 16 07:40:00 2006

This archive was generated by hypermail 2.1.8 : 2006-06-16 07:40:12 EST