[Numpy-discussion] Does float16 exist?

Charles R Harris charlesr.harris@gmail....
Tue Jan 8 18:18:23 CST 2008


On Jan 8, 2008 5:01 PM, Bill Baxter <wbaxter@gmail.com> wrote:

> On Jan 9, 2008 8:03 AM, Charles R Harris <charlesr.harris@gmail.com>
> wrote:
> > On Jan 8, 2008 1:58 PM, Bill Baxter <wbaxter@gmail.com> wrote:
> > > If you're really going to try to do it, Charles, there's an
> > > implementation of float16 in the OpenEXR toolkit.
> > > http://www.openexr.com/
> > >
> > > Or more precisely it's in the files in the Half/ directory of this:
> > >
> http://download.savannah.nongnu.org/releases/openexr/ilmbase-1.0.1.tar.gz
> > >
> > > I don't know if it's IEEE conformant or not (especially w.r.t. NaN's
> > > and such) but it should be a good start.  The code seems to be well
> > > documented.
> >
> > The license looks good, essentially BSD. The code is all C++, which is
> the
> > obvious way to go for this sort of thing, and I would like to stick with
> it,
> > but that could lead to build/compatibility problems. I think NumPy
> itself
> > should really be in C++.  Maybe scons can help with the build.
>
> Yeh, I was just thinking you'd rip out and C-ify the main algorithms
> rather than trying to wrap it as-is.


I'd rather not C-ify the thing, I'd rather C++-ify parts of NumPy. I note
that MatPlotLab uses C++, so some of the problems must have been solved.

Chuck
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