IEOR (integer, integer)

  Class:  Elemental function - Generic

  Performs an exclusive OR of the arguments on a bit by bit basis
  (bit exclusive OR).  This function can also be specified as XOR.

  +------+---------+----------+------------+-------------+
  | Args | Generic | Specific |  Argument  | Result Type |
  +------+---------+----------+------------+-------------+
  |  2   | IEOR    |   --     | INTEGER*1  | INTEGER*1   |
  |      |         | IIEOR    | INTEGER*2  | INTEGER*2   |
  |      |         | JIEOR    | INTEGER*4  | INTEGER*4   |
  |      |         | KIEOR    | INTEGER*8  | INTEGER*8   |
  +------+---------+----------+------------+-------------+