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[Bug math/15425] New: exp fails to raise underflow exception
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Wed, 01 May 2013 22:13:16 +0000
- Subject: [Bug math/15425] New: exp fails to raise underflow exception
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=15425
Bug #: 15425
Summary: exp fails to raise underflow exception
Product: glibc
Version: 2.18
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: jsm28@gcc.gnu.org
Classification: Unclassified
On x86_64, exp (-0x1.75f113c30b1c8p+9) fails to raise the underflow exception,
though the result correctly underflows to 0. (Tested with current glibc master
revision a07c5731d63d0db1659d273ee42d46ac15daeffc, on hardware that uses the
IFUNC version of exp built for AVX, although I suspect that's irrelevant and
the bug is more generic.)
(Discovered through the consequential effect of tgamma (-0xb8.000000000008p0)
also failing to raise underflow.)
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