or(3I)

NAME
     OR - Computes logical sum

SYNOPSIS
     OR ([I=]i,[J=]j)

STANDARDS
     Fortran extension

DESCRIPTION
     OR is an elemental function.  It accepts the following arguments:

     i         Must be of type Boolean, integer, real, Cray pointer, or
               logical.

     j         Must be of type Boolean, integer, real, Cray pointer, or
               logical.

NOTES
     This is an outmoded routine.  Refer to the MIPSpro Fortran Language
     Reference Manual, Volume 3, for information about outmoded features
     and their preferred standard alternatives.

     The name of this intrinsic cannot be passed as an argument.

CAUTIONS
     Unexpected results can occur when Boolean functions are declared
     external and then used with logical arguments.  The external Boolean
     functions always treat their arguments as type Boolean and return an
     integer result.

RETURN VALUES
     When given two arguments of type logical, OR computes a logical sum
     and returns a logical result.

     When given two arguments of type integer, real, Boolean, or pointer,
     OR computes a bit-wise logical sum and returns a Boolean result.  No
     type conversion occurs.

     The following tables show both the logical sum and bit-wise logical
     sum:

     -----------------------------------------------------------------
        Logical
      Variable 1

                       Logical
                     Variable 2

                                         (Logical Variable 1) OR
                                          (Logical Variable 2)

     -----------------------------------------------------------------

           T
                          T
                                                    T

           T
                          F
                                                    T

           F
                          T
                                                    T

           F
                          F
                                                    F

     -----------------------------------------------------------------


     --------------------------------------------------------------
     Bit of
     Variable 1

                   Bit of
                   Variable 2

                                 (Bit of Variable 1) OR
                                 (Bit of Variable 2)

     --------------------------------------------------------------

          1
                        1
                                                 1

          1
                        0
                                                 1

          0
                        1
                                                 1

          0
                        0
                                                 0

     --------------------------------------------------------------

EXAMPLES
     The following section of Fortran code shows the OR function used with
     two arguments of type logical:

          LOGICAL L1, L2, L3
          ...
          L3 = OR(L1,L2)

     The following section of Fortran code shows the OR function used with
     two arguments of type integer.  The bit patterns of the arguments and
     result are also shown.  For clarity, only the rightmost 8 bits are
     shown.

   INTEGER I1, I2, I3
   I1 = 12
   I2 = 10
   ...
   I3 = OR(I1,I2)

       -------------------------------     -------------------------------
      | 0 |   |   |   |   |   |   |   |   | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
       -------------------------------    -------------------------------
                     I1                               I2

                     -------------------------------
                    | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 |
                    -------------------------------
                                    I3