[Bug fortran/32979] New: Implement vendor-specific ISNAN() intrinsic function

["burnus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Several compilers have an generic intrinsic function ISNAN():
interface
  logical function isnan(x)
     real, intent(in) :: x
  end function isnan
end interface

Example for compilers implementing it: ifort, g95, sunf95, sgi.
Example for a program using it: http://www.libatoms.org/

Note: Fortran 2003 has IEEE_IS_NAN() in the module IEEE_ATRITHMETIC; the isnan
implementation should follow the Fortran 2003 standard.


-- 
           Summary: Implement vendor-specific ISNAN() intrinsic function
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32979