How to detect NaN's

[Keith Bierman fpgroup]

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
                                          ^^^????
try man ieee_handler() and man f77 (-fnonstandard)

I don't see how to make this any easier; here is what I usually use

	i=ieee_handler("set","common",%val(2)) !%val(2) is SIGFPE_ABORT
					       
f77_floatingpoint.h contains the definition of %val(2) and a lot of
other things. I can type %val(2) faster, so I personally wind up using
it more often than I should.

This isn't a particularly new feature; you might wish to peruse the
Numerical Computation Guide.
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