Re: roundTiesToEven in precision 1

[Vincent Lefevre <vincent@xxxxxxxxxx>]

> 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/>
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Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon)