Re: Directed rounding

[John W. Eaton]

On 09/17/2015 11:43 AM, Juan Pablo Carbajal wrote:
> On Thu, Sep 17, 2015 at 4:47 PM, Eric Walter
> <address@hidden> wrote:
> > Dear colleagues,
> >
> > If this is not already the case, would you please consider making directed
> > rounding, as made available on all IEEE 747 compliant processors, simply
> > accessible to gnu-octave users? This would help assessing the number of
> > significant digits in the results of floatting-point computation.
> >
> > Best regards,
> >
> > Eric Walter
>
> Dear Eric,
>
> I might not get the point correctly, but are the functions round, fix,
> floor, ceil, sign, chop not doing what you need?

Please file a feature request "bug" on the bug tracker.

If I understand correctly, you are asking to make the functions 
fegetround and fesetround available in Octave if they are supported by 
the system, correct?

It should not be too hard for you to write your own wrappers for those 
functions.  I'd probably define them to accept/return strings like 
"nearest", "up", "down", "toward-zero" or similar.

If you do write your own, please consider contributing them.

Thanks,

jwe