BOOL(3F-SVR3)       RISC/os Reference Manual        BOOL(3F-SVR3)



NAME
     bool: and, or, xor, not, lshift, rshift - Fortran Bitwise
          Boolean functions

SYNOPSIS
     integer i, j, k
     real a, b, c

     k = and(i, j)
     c = or(a, b)
     j = xor(i, a)
     j = not(i)
     k = lshift(i, j)
     k = rshift(i, j)

DESCRIPTION
     The generic intrinsic Boolean functions and, or and xor
     return the value of the binary operations on their argu-
     ments.  not is a unary operator returning the one's comple-
     ment of its argument.  lshift and rshift return the value of
     the first argument shifted left or right, respectively, the
     number of times specified by the second (integer) argument.

     While it is recommended that Boolean functions be used only
     on integer data, these functions are generic; that is, they
     are defined for all data types as arguments and return
     values. Where required, the compiler generates appropriate
     type conversions.  However, when the functions are not used
     with integer data, the results are unpredictable.

ERRORS
     The implementation of the shift functions may cause large
     shift values to deliver weird results.

SEE ALSO
     mil(3F).



















                        Printed 11/19/92                   Page 1