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[Bug math/15405] New: csin, csinh, ccos, ccosh missing underflow exceptions
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Fri, 26 Apr 2013 15:26:46 +0000
- Subject: [Bug math/15405] New: csin, csinh, ccos, ccosh missing underflow exceptions
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=15405
Bug #: 15405
Summary: csin, csinh, ccos, ccosh missing underflow exceptions
Product: glibc
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: jsm28@gcc.gnu.org
Classification: Unclassified
Similar to bug 14478 (fixed) for cexp, the functions csin, csinh, ccos, ccosh
are missing underflow exceptions when the final result underflows but the
multiplication generating it is exact although the mathematical result of the
function is not exactly representable. Examples showing this on x86_64 are:
csin (0x1p-1074 + 0x1p-1022i)
csinh (0x1p-1022 + 0x1p-1074i)
ccos (0x1p-954 + 0x1p-120i)
ccosh (0x1p-120 + 0x1p-954i)
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