poppar(3I)

NAME
     _poppar, POPPAR - Computes bit population parity

SYNOPSIS
     C/C++:

     #include <intrinsics.h>
     int _poppar (long i);

     Fortran:

     POPPAR ([I=]i)

IMPLEMENTATION
     C/C++:  UNICOS and UNICOS/mk systems

     Fortran:  UNICOS, UNICOS/mk, and IRIX systems

STANDARDS
     C/C++:  Cray Research extension

     Fortran:  CF90 and MIPSpro 7 Fortran 90 compiler extension to Fortran
     90

C/C++ DESCRIPTION
     The _poppar function returns 0 if the argument i has an even number of
     bits that are set to 1.  This is the parity of the population count
     for argument i.

FORTRAN DESCRIPTION
     This intrinsic function computes the bit population parity and returns
     an integer value.  It accepts the following argument:

     i    A Boolean, integer, real, or Cray pointer value.  On IRIX
          systems, i cannot be declared as REAL(KIND=16).

     POPPAR is an elemental function.  The name of this intrinsic cannot be
     passed as an argument.

NOTES
     The bit representation of the logical data type is not consistent
     among Cray Research systems.  For further details, see your compiler's
     reference manuals.

C/C++ NOTES
     Because _poppar is an intrinsic function, no externally visible
     library function is available for it.  The compiler generates inline
     code to produce the result.

FORTRAN RETURN VALUES
     In Fortran, POPPAR returns the value 0 if an even number of bits in i
     are set.  It returns the value 1 if an odd number of bits are set in
     i.

     The return value is of type integer.

EXAMPLES
     The following section of Fortran code shows the POPPAR function used
     with an argument of type integer.  The bit pattern of the argument and
     the value of the result are also given.  For simplicity, a 16-bit
     object is used.

          INTEGER I1, I2
          ...
          I2 = POPPAR(I1)


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

     The POPPAR function returns the value 0 to the integer variable I2.

SEE ALSO
     A complete list of C/C++ intrinsic functions available on Cray
     Research systems is in the Cray C/C++ Reference Manual, publication SR
     -2179.

     Intrinsic Procedures Reference Manual, publication SR-2138, for the
     printed version of this man page.