[cfp-interest 3637] Re: Rounding Mode

Vincent Lefevre vincent at vinc17.net
Fri Sep 26 06:15:03 PDT 2025


> >> F.8.3 and F.8.4 incorrectly imply that rounding precision mode is
> >> an optional feature of ISO/IEC 60559. (Likewise, ?trapping? is no
> >> longer mentioned as a user feature in 754. Traps are mentioned
> >> only in an implementation note.) We might consider updating
> >> F.8.3. and F.8.4 to remove the reference to rounding precision
> >> (and trapping) mode which is obsolete from a standards
> >> perspective.

Traps have actually been replaced by alternate exception handling,
which is an optional feature of ISO/IEC 60559.

On 2025-09-23 18:40:32 -0700, Jim Thomas wrote:
> I agree that “rounding direction mode” seems better than “rounding mode”. As previously noted, “attribute” has another meaning in C.

AFAIK, "mode" was replaced by "attribute" because some readers
assumed that "mode" was necessarily dynamic instead of being
given by the operation name (instruction). In any case, in C,
this is never part of the operation name.

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Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
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