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[Bug math/16447] erfc (0x6.a8p+4) ldbl-128 throws underflow exception
- From: "joseph at codesourcery dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Tue, 04 Feb 2014 16:04:07 +0000
- Subject: [Bug math/16447] erfc (0x6.a8p+4) ldbl-128 throws underflow exception
- Auto-submitted: auto-generated
- References: <bug-16447-131 at http dot sourceware dot org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=16447
--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I would say that the calculation of "unsafe" (which determines whether
there is a final scaling step) should be adjusted to count a wider range
of cases as unsafe - any case where the problem multiplication might
underflow.
Note that since this has been tracked to a problem with expl, any fix
should add a corresponding expl input showing the problem as an exp test
in auto-libm-test-in, rather than only testing the problem indirectly
through erfc.
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