How to detect NaN's

[Greg Lindahl]

In article <1991May31.130807 at IASTATE.EDU> keinert at IASTATE.EDU (Keinert Fritz) writes:

>One of my biggest gripes with both the Sun and Mips Fortran compilers
>is that there is no easy way to turn on floating point exception
>handling.

It's fairly trivial under SunOS 4.X:

      subroutine initerrors
      integer n, ieee_handler, sigfpe_abort
      n = ieee_handler( 'set', 'common', SIGFPE_ABORT )
      return
      end

This produces nice crashes when you want them. Now if only IBM would
see the light...