[Cfp-interest 2009] Re: AIs related to range errors clarifications

[David Chen]

Could we say "mathematical result with infinite precision"?  We may have to
consider the possibility that an implementation generates its final results
directly without any preliminary results or rounding during the process.

Best,
David.


On Tue, May 25, 2021 at 11:01 AM Fred J. Tydeman <tydeman at tybor.com> wrote:

> On Sat, 22 May 2021 21:08:44 -0700 Jim Thomas wrote:
> >
> >The IEC 60559 model for correct rounding includes a (hypothetical)
> preliminary result correct to infinite range and precision. In C (outside
> of Annex F), which doesn't have this model and doesn't require correct
> rounding, what does "result with infinite precision" refer to?
>
> I was thinking of result before final rounding.
>
> I want to exclude zero and +/-min normal if they are exact from being
> underflow.
>
>
> ---
> Fred J. Tydeman        Tydeman Consulting
> tydeman at tybor.com      Testing, numerics, programming
> +1 (702) 608-6093      Vice-chair of PL22.11 (ANSI "C")
> Sample C99+FPCE tests: http://www.tybor.com
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-- 
Best Regards,
David.

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