On Wed, May 18, 2016 at 04:10:37PM +0100, David Howells wrote: > (3) I've added cmpxchg_return() and try_cmpxchg() to replace cmpxchg(). > I've also provided atomicX_t variants of these. These return the > boolean return value from the __atomic_compare_exchange_n() function > (which is carried in the Z flag on x86). Should this be rolled out > even without the ISO atomic implementation?
I suppose we could, esp. with GCC-6.1 having cc-output using the Z flag should result in nicer code.
