[PATCH] PPC atomic cleanup

[Steven Munroe]

PPC should have separate acquire and release forms of the 
atomic_exchange operation.

2003-05-12  Steven Munroe <sjmunroe@us.ibm.com>

	* sysdeps/powerpc/bits/atomic.h
	(__arch_compare_and_exchange_bool_8_rel): Define.
	(__arch_compare_and_exchange_bool_16_rel): Define.
	(__ARCH_REL_INSTR): Define if not already defined.
	(__arch_atomic_exchange_and_add_32): Add "memory" to clobber list.
	(__arch_atomic_decrement_if_positive_32):
	Add "memory" to clobber list.
	(__arch_compare_and_exchange_val_32_acq): Remove release sync.
	(__arch_compare_and_exchange_val_32_rel): Define.
	(__arch_atomic_exchange_32): Remove.
	(__arch_atomic_exchange_32_acq): Define.
	(__arch_atomic_exchange_32_rel): Define.
	(atomic_compare_and_exchange_val_rel): Define.
	(atomic_exchange_acq): Use __arch_atomic_exchange_*_acq forms.
	(atomic_exchange_rel): Define.
	* sysdeps/powerpc/powerpc32/bits/atomic.h
	(__arch_compare_and_exchange_bool_32_acq): Remove release sync.
	(__arch_compare_and_exchange_bool_32_rel): Define.
	(__arch_compare_and_exchange_bool_64_rel): Define.
	(__arch_compare_and_exchange_val_64_rel): Define.
	(__arch_atomic_exchange_64): Remove.
	(__arch_atomic_exchange_64_acq): Define.
	(__arch_atomic_exchange_64_rel): Define.
	* sysdeps/powerpc/powerpc64/bits/atomic.h
	{__arch_compare_and_exchange_bool_32_rel): Define.
	(__arch_compare_and_exchange_bool_64_acq): Remove release sync.
	(__arch_compare_and_exchange_bool_64_rel): Define.
	(__arch_compare_and_exchange_val_64_acq): Remove release sync.
	(__arch_compare_and_exchange_val_64_rel): Define.
	(__arch_atomic_exchange_64): Remove.
	(__arch_atomic_exchange_64_acq): Define.
	(__arch_atomic_exchange_64_rel): Define.
	(__arch_atomic_exchange_and_add_64): Add "memory" to clobber list.
	(__arch_atomic_decrement_if_positive_64):
	Add "memory" to clobber list.
	[!UP](__ARCH_REL_INSTR): Define as lwsync.
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