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POPPAR(3I)					       Last changed: 1-6-98

NAME    [Toc]    [Back]

     _poppar, POPPAR - Computes	bit population parity

SYNOPSIS    [Toc]    [Back]

     C/C++:

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

     Fortran:

     POPPAR ([I=]i)

IMPLEMENTATION    [Toc]    [Back]

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

     Fortran:  UNICOS, UNICOS/mk, and IRIX systems

STANDARDS    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

      
      
     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.

POPPAR(3I)					       Last changed: 1-6-98

NAME    [Toc]    [Back]

     _poppar, POPPAR - Computes	bit population parity

SYNOPSIS    [Toc]    [Back]

     C/C++:

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

     Fortran:

     POPPAR ([I=]i)

IMPLEMENTATION    [Toc]    [Back]

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

     Fortran:  UNICOS, UNICOS/mk, and IRIX systems

STANDARDS    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

      
      
     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.

[ Back ]
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