http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52201
--- Comment #3 from dave.anglin at bell dot net 2012-02-10 22:44:17 UTC --- On 2/10/2012 5:41 PM, John David Anglin wrote: > There is only only one atomic instruction (ldcw). Actually, loads and stores are also atomic and strongly ordered. But that's it.