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[Bug math/15319] New: Missing underflow exceptions from atan / atan2
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 28 Mar 2013 20:55:18 +0000
- Subject: [Bug math/15319] New: Missing underflow exceptions from atan / atan2
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=15319
Bug #: 15319
Summary: Missing underflow exceptions from atan / atan2
Product: glibc
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: jsm28@gcc.gnu.org
Classification: Unclassified
Various implementations of atan and atan2 functions fail to raise underflow
exceptions for subnormal arguments (when the result is very close to an input
subnormal, but inexact so should raise underflow). For example, on x86_64,
atan2f (0x1.fp-129f, 1.0f) returns the correct result 0x1.fp-129f but fails to
raise an underflow exception.
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