K 10
svn:author
V 4
jkim
K 8
svn:date
V 27
2013-08-16T00:00:36.694084Z
K 7
svn:log
V 161
MFC:	r254384

Simplify check for CMPXCHG8B instruction.  Note CMPXCHG8B instruction is
always available for Rise mP6 processors although it is not set by CPUID.

END