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* [Bug math/15429] New: ldbl-128 cos() inaccurate new pi/2
@ 2013-05-02 20:35 davem at davemloft dot net
2013-05-09 13:14 ` [Bug math/15429] " carlos at redhat dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: davem at davemloft dot net @ 2013-05-02 20:35 UTC (permalink / raw)
To: glibc-bugs
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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^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug math/15429] ldbl-128 cos() inaccurate new pi/2 2013-05-02 20:35 [Bug math/15429] New: ldbl-128 cos() inaccurate new pi/2 davem at davemloft dot net @ 2013-05-09 13:14 ` 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 2 siblings, 0 replies; 4+ messages in thread From: carlos at redhat dot com @ 2013-05-09 13:14 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15429 Carlos O'Donell <carlos at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |carlos at redhat dot com --- Comment #1 from Carlos O'Donell <carlos at redhat dot com> 2013-05-09 13:14:50 UTC --- I'll be disabling this test for ldbl-128 until we fix this. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/15429] ldbl-128 cos() inaccurate new pi/2 2013-05-02 20:35 [Bug math/15429] New: ldbl-128 cos() inaccurate new pi/2 davem at davemloft dot net 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 2 siblings, 0 replies; 4+ messages in thread From: jsm28 at gcc dot gnu.org @ 2013-05-09 21:31 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15429 Joseph Myers <jsm28 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED --- Comment #2 from Joseph Myers <jsm28 at gcc dot gnu.org> 2013-05-09 21:31:18 UTC --- Fixed for 2.18 by: commit d0213cd0b629cae95ed9607fcf26793a3a0d686c Author: Joseph Myers <joseph@codesourcery.com> Date: Thu May 9 21:28:54 2013 +0000 Fix ldbl-128 cos range reduction near pi/2 (bug 15429). -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/15429] ldbl-128 cos() inaccurate new pi/2 2013-05-02 20:35 [Bug math/15429] New: ldbl-128 cos() inaccurate new pi/2 davem at davemloft dot net 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 2 siblings, 0 replies; 4+ messages in thread From: fweimer at redhat dot com @ 2014-06-13 18:08 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=15429 Florian Weimer <fweimer at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Flags| |security- -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-06-13 18:08 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-05-02 20:35 [Bug math/15429] New: ldbl-128 cos() inaccurate new pi/2 davem at davemloft dot net 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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