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[Bug math/14914] New: ldbl-128ibm powl inaccuracy
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Mon, 03 Dec 2012 22:34:22 +0000
- Subject: [Bug math/14914] New: ldbl-128ibm powl inaccuracy
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=14914
Bug #: 14914
Summary: ldbl-128ibm powl inaccuracy
Product: glibc
Version: 2.16
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: jsm28@gcc.gnu.org
Classification: Unclassified
Host: powerpc*-*
Various powl tests fail for ldbl-128ibm with errors of up to 168ulp:
Failure: Test: pow (0x1.0000000000001p0, -0x1.23456789abcdfp61) ==
1.0118762747828234466621210689458255908670e-253
Result:
is: 1.01187627478282344666e-253 0x1.7bd57afffb8670bdc80bp-841
should be: 1.01187627478282344666e-253 0x1.7bd57afffb8670bdc80bp-841
difference: 2.82339593858271666738e-283 0x1.4fe00000000000000000p-939
ulp : 167.9375
max.ulp : 0.0000
Maximal error of `pow'
is : 168 ulp
accepted: 1 ulp
I have a patch.
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