Signed zeros: is this a bug?

[Paul Rubin]

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
> 	Pardon? What is "the right thing with signed zeros"... In the last
> 30 years I've been on machines that normalize floating zero into a true
> zero (all bits are zero: mantissa, exponent, and sign). This is the
> first time I've even seen a variable output as a negative 0.0!

Most machines these days use IEEE 754 which supports negative zero.

http://en.wikipedia.org/wiki/Negative_zero