K 10 svn:author V 10 nwhitehorn K 8 svn:date V 27 2010-10-31T22:55:51.013361Z K 7 svn:log V 199 Next-to-leading-order perturbation of synchronization operations for switching the user segment register. All races should now be closed and a minimum of pipelines flushes be required to close them. END