LOGIOR

bitwise logical inclusive or of zero or more integers 
Major Section:  PROGRAMMING

When integers are viewed in their two's complement representation, logior returns their bitwise logical inclusive or. In ACL2 logior is a macro that expands into calls of the binary function binary-logior, except that (logior) expands to 0 and (logior x) expands to x.

The guard for binary-logior requires its arguments to be integers. Logior is defined in Common Lisp. See any Common Lisp documentation for more information.