bigfloat

[dsimcha]

== Quote from Jarrett Billingsley (jarrett.billingsley at gmail.com)'s article
> On Wed, Apr 8, 2009 at 3:39 PM, Walter Bright
> <newshound1 at digitalmars.com> wrote:
> > Paul D. Anderson wrote:
> >>
> >> b) the features and functions that should be included.
> >
> > I'd say NaNs and unordered comparisons. In other words, it should support
> > the same semantics as float, double and real do.
> opUnorderedCmp?

What's wrong with just returning some sentinel from opCmp?  For example, define
int.max as the sentinel for when comparing with nans involved, etc.  For opEquals,
we don't have a problem, just return false.