3e195d9371
* sysdeps/powerpc/bits/atomic.h (__arch_atomic_exchange_32): New macro. (__arch_atomic_exchange_64): New macro. (atomic_exchange): Use them. (__arch_atomic_exchange_and_add_32): New macro. (__arch_atomic_exchange_and_add_64): New macro. (atomic_exchange_and_add): Use them. Original patch from Steven Munroe <sjmunroe@us.ibm.com>.