Re: roundTiesToEven in precision 1
> Date: Wed, 25 Mar 2009 23:53:25 +0100
> From: Vincent Lefevre <vincent@xxxxxxxxxx>
> To: stds-1788 <stds-1788@xxxxxxxxxxxxxxxxx>
> Cc: stds-754@xxxxxxxxxxxxxxxxx
> Subject: Re: roundTiesToEven in precision 1
>
> > From: Dan Zuras Intervals <intervals08@xxxxxxxxxxxxxx>
> > Subject: Re: roundTiesToEven in precision 1 Date: Tue, 24 Mar 2009 21:28:59 -0700
> >
> >
> > Vincent,
> >
> > I'm not quite sure what you mean by precision 1 but the
> > context of your question suggests that 754 breaks down
> > when p = 1.
> >
> > So, if you are suggesting that things break down when
> > one goes to so small a precision, I think this is likely.
> >
> > We debated making some statement about this in the text
> > of the standard but as the whole purpose of extended &
> > extendable precisions was to go beyond the other precisions
> > available, we thought it an unnecessary thing to point out.
>
> Well, this is a bit important as precision 1 can be used for output
> by other standards, e.g. the ISO C standard. And this is what my
> program was showing.
>
> > Still, I believe you are correct.
> >
> > Yours,
> >
> > Dan
>
> Regards,
>
> --
> Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <http://www.vinc17.org/>
> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/>
> Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon)
Well, I don't know how important it will turn out to be
but I have already communicated with the IEEE on your
behalf to the effect that we must have p > 1 & emax >= 1. - Dan