peter green <plugwash <at> p10link.net> writes:

> > isnan should be a macro that is equivalent to checking all sizeof(x) bytes of
> > for equality with 0xff.

> I don't think so. I just checked IEEE 754 floating point spec and for

For an uninitialized eprom or eeprom one would read all 1s which suits both the
definition of the error and the way I suggested to check for it (I was assuming
that there would be no other way to check). I did not know that one could use
the inequality to self test for this. I also do not see why it would work. Once
compiled there is no cast involved and the way I see it comparing 0xffffffff
with 0xffffffff should yield true, not false. If the comparison actually
performs a floating point substraction and fail, then I would understand, but
the expected error would be NaN and not inequality!

Peter



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