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[Bug math/18619] New: [ldbl-128] expm1l wrong sign of underflowing zero results
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Wed, 01 Jul 2015 21:57:51 +0000
- Subject: [Bug math/18619] New: [ldbl-128] expm1l wrong sign of underflowing zero results
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=18619
Bug ID: 18619
Summary: [ldbl-128] expm1l wrong sign of underflowing zero
results
Product: glibc
Version: 2.21
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: jsm28 at gcc dot gnu.org
Target Milestone: ---
Similar to bug 18569 for x86 / x86_64, in the ldbl-128 implementation of
expm1l, when expm1l's result should underflow to 0, it can be a zero of the
wrong sign.
Failure: Test: expm1_upward (-0x4p-16496)
Result:
is: 0.00000000000000000000e+00 0x0.00000000000000000000p+0
should be: -0.00000000000000000000e+00 -0x0.00000000000000000000p+0
difference: 0.00000000000000000000e+00 0x0.00000000000000000000p+0
ulp : 0.0000
max.ulp : 3.0000
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