[cpp-threads] A question about N2153

[Alexander Terekhov]

On 1/25/07, Raul Silvera <rauls at ca.ibm.com> wrote:
> Yes. I think that anything else couldn't really be called ordered.
> On PPC, it would require a leading sync and a trailing lwsync.

Trailing lwsync won't provide trailing StoreLoad.

>
> In most cases, the useful variant is the acquire RMW, which will be just a
> trailing isync.

Hear hear, that must be why Itanium provides xchg.acq and doesn't
provide xchg.rel variant. :-)

regards,
alexander.