Implement C23 pown [committed]

[Segher Boessenkool]

On Wed, Jun 04, 2025 at 02:35:39PM +0200, Vincent Lefevre wrote:
> On 2025-06-03 11:09:07 -0500, Segher Boessenkool wrote:
> > The commit message clearly says this implementation isd correct for
> > IEEE float only.  And indeed it is not for double-double, which is very
> > much not IEEE.
> > 
> > Maybe these tests should require IEEE float?  The implementation does,
> > after all!
> 
> Shouldn't this implementation rather be disabled with non-IEEE floats
> (thus not just the tests), as it is not correct?

Maybe?  Some of the end results are terrible (+inf for -inf raised to
some big odd number, NaN where it should be some finite result), but
perhaps most results are somewhat close to an appropriate number.

But testing the edge cases (as this testcase does) simply does not work.


Segher