[PATCH] math: Fix unsupported check in test-narrowing-trap

[Andreas K. Huettel]

Am Freitag, 17. Juli 2026, 00:39:12 Japanische Normalzeit schrieb Adhemerval Zanella Netto:
> 
> On 16/07/26 12:25, Yury Khrustalev wrote:
> > On Thu, Jul 16, 2026 at 12:13:58PM -0300, Adhemerval Zanella Netto wrote:
> >>
> >>
> >> On 16/07/26 12:03, Yury Khrustalev wrote:
> >>> On Thu, Jul 16, 2026 at 12:00:16PM -0300, Adhemerval Zanella Netto wrote:
> >>>>
> >>>> On 16/07/26 11:01, Yury Khrustalev wrote:
> >>>>> ---
> >>>>>
> >>>>> Base commit: af51ed63d0
> >>>>>
> >>>>> Test change only. Passes regression on aarch64-linux-gnu,
> >>>>> x86_64-linux-gnu, i686-linux-gnu and build-tested for
> >>>>> several targets with build-many-glibcs.py.
> >>>>>
> >>>>> Andreas, I suppose we could merge this test fix now? It's OK if not.

Sure. Test improvement, that's fine. Thank you!

> >>>>
> >>>> Is this fix for loongarch? If so I think you can check with cfarm401
> >>>> machine [1] (for some reason cfarm400 is not accepting my keys).
> >>>>
> >>>> [1] https://portal.cfarm.net/machines/list/
> >>>
> >>> The fix is for aarch64 actually. Some hosts support these tests and
> >>> in this case the 'math/test-narrowing-trap' test was incorrectly
> >>> reported as UNSUPPORTED.
> >> Right, so maybe add some context on the commit message. Another option
> >> would to rewrite EXCEPTION_ENABLE_SUPPORTED on aarch64/arm to actually
> >> test whether exceptions are support (since on ARM seems to have the
> >> concept of being 'optional').
> > 
> > The fix is not aarch64-specific though. All other tests that use this
> > functionality use return value of feenableexcept before they decide if
> > the test is supported or not. In the test-narrowing-trap test, however,
> > the order of checks was wrong. As a side-effect of this I see spurious
> > UNSUPPORTED math test on some aarch64 hosts. I've asked the authors of
> > the these tests to fix it, but they haven't, hence this patch.
> Fair enough, the patch looks good then.
> 


-- 
PD Dr. Andreas K. Hüttel
dilfridge@gentoo.org
Gentoo Linux developer 
(council, comrel, toolchain, base-system, perl, libreoffice)
https://wiki.gentoo.org/wiki/User:Dilfridge
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