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From: "davem at davemloft dot net" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/15429] New: ldbl-128 cos() inaccurate new pi/2
Date: Thu, 02 May 2013 20:35:00 -0000 [thread overview]
Message-ID: <bug-15429-131@http.sourceware.org/bugzilla/> (raw)
http://sourceware.org/bugzilla/show_bug.cgi?id=15429
Bug #: 15429
Summary: ldbl-128 cos() inaccurate new pi/2
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: davem@davemloft.net
Classification: Unclassified
On sparc, which uses ldbl-128, the tests using cos() on pi/2 give
inaccurate results. For example:
Test "cos (pi/2) == 0x1.cd129024e088a67cc74020bbea64p-115":
ildouble: 267676
ldouble: 267676
...
Test "sincos (pi/2, &sin_res, &cos_res) puts
0x1.cd129024e088a67cc74020bbea64p-115 in cos_res":
ildouble: 267676
ldouble: 267676
...
Function "cos":
ildouble: 267676
ldouble: 267676
...
Function "sincos":
ildouble: 267676
ldouble: 267676
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next reply other threads:[~2013-05-02 20:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-02 20:35 davem at davemloft dot net [this message]
2013-05-09 13:14 ` [Bug math/15429] " carlos at redhat dot com
2013-05-09 21:31 ` jsm28 at gcc dot gnu.org
2014-06-13 18:08 ` fweimer at redhat dot com
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