[PATCH] Fix powf overflow handling in non-nearest rounding mode [BZ #23961]

[Joseph Myers]

On Mon, 10 Dec 2018, Szabolcs Nagy wrote:

> 2018-12-10  Szabolcs Nagy  <szabolcs.nagy@arm.com>
> 
> 	[BZ #23961]
> 	* math/auto-libm-test-in: Add new test case.
> 	* math/auto-libm-test-out-pow: Regenerated.
> 	* sysdeps/ieee754/flt-32/e_powf.c (__powf): Fix overflow check.

OK.

(It's possible some architecture with its own powf implementation could 
need to XFAIL the new tests if that architecture doesn't get overflow 
exactly right for those cases: the test infrastructure doesn't currently 
support marking a test as very close to the overflow threshold and then 
allowing appropriately for computed results on the other side of that 
threshold only being slightly inaccurate, so OK, as long as they handle 
errno / exceptions consistently with the returned value.)

-- 
Joseph S. Myers
joseph@codesourcery.com