On Wed, Sep 3, 2008 at 6:53 PM, Anton Blanchard <[EMAIL PROTECTED]> wrote: > The only thing lwsync wont order is a store followed by a load. Since > the lwsync will always be paired with a store (the stwcx), we will order > all accesses before it and provide a release barrier.
Anton, My one other concern is developers using the builtins for applications on embedded PowerPC processors. lwsync will not order accesses to device memory space, AFAICT. I do not know if developers would rely on GCC builtins in that context and assume it implements the correct semantics. Otherwise, I agree that the memory barrier operations probably can use lwsync. David
