LOGORC1

bitwise logical inclusive or of two ints, complementing the first 
Major Section:  PROGRAMMING

When integers are viewed in their two's complement representation, logorc1 returns the bitwise logical inclusive or of the second with the bitwise logical `not' of the first.

The guard for logorc1 requires its arguments to be integers. Logorc1 is defined in Common Lisp. See any Common Lisp documentation for more information.