------- Comment #2 from kargl at gcc dot gnu dot org 2008-01-23 02:58 ------- Roger Sayle implemented .xor., but it was not committed to the tree. You can probably find discussion in the mailing list archive if you care to do some spelunking. I recall the patch wasn't committed because of possible conflicts with a user defined .xor. operator.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34933