Log Message:
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add sparc64 specific code.
Added Files:
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src/sys/cddl/contrib/opensolaris/common/atomic/sparc64:
atomic.S (r1.1)
(http://cvsweb.midnightbsd.org/src/sys/cddl/contrib/opensolaris/common/atomic/sparc64/atomic.S?rev=1.1&content-type=text/x-cvsweb-markup)