K 10
svn:author
V 8
jhibbits
K 8
svn:date
V 27
2017-01-30T02:15:54.402805Z
K 7
svn:log
V 290
Add atomic_fcmpset_*() inlines for powerpc

Summary:
atomic_fcmpset_*() is analogous to atomic_cmpset(), but saves off the read value
from the target memory location into the 'old' pointer in the case of failure.

Requested by:	 mjg
Differential Revision: https://reviews.freebsd.org/D9325

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