Determining IEEE NaN and INF on RISC Ultrix

[Fletcher Kittredge]

I need to determine whether a double precision floating point number is
a IEEE NaN or INF (+ or -) value on Sun, HP and DEC RISC systems.  Sun
and HP supply the isnan() and isinf() functions.  I can't find these
functions on the DEC systems.  There is a include file called
/usr/include/nan.h which seems to have macros for determining these
values, but the macros seem to be for a high-endian MIPS system, not
DEC's low-endian version.

Can anyone help me with this?

thanks!
fletcher


Fletcher E. Kittredge  fkittred at bbn.com
Platforms and Tools Group
BBN Software Products Company
10 Fawcett St.
Cambridge, MA. 02138