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* [Bug math/13854] New: tan() is incorrect for large inputs on x86_64 and x86 @ 2012-03-15 15:14 aj at suse dot de 2012-03-15 15:38 ` [Bug math/13854] " aj at suse dot de ` (4 more replies) 0 siblings, 5 replies; 6+ messages in thread From: aj at suse dot de @ 2012-03-15 15:14 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=13854 Bug #: 13854 Summary: tan() is incorrect for large inputs on x86_64 and x86 Product: glibc Version: 2.13 Status: NEW Keywords: glibc_2.15 Severity: normal Priority: P2 Component: math AssignedTo: unassigned@sourceware.org ReportedBy: aj@suse.de CC: aj@suse.de, bugdal@aerifal.cx, carlos@systemhalted.org, ppluzhnikov@google.com, vincent-srcware@vinc17.net Depends on: 13658 Blocks: 13851, 13852 Classification: Unclassified +++ This bug was initially created as a clone of Bug #13658 +++ tan is inaccurate, see bug #13658 for a reference. Test program: #define _GNU_SOURCE #include <stdio.h> #include <math.h> int main (void) { volatile float xf = 1e22; float s1f, s2f; volatile double xd = 1e22; double s1d, s2d; volatile long double xl = 1e22; long double s1l, s2l; s1d = tan (xd); printf ("double: \n"); printf ("x = %.17g\n", xd); printf ("s1 = %.17g\n", s1d); s1f = tanf (xf); printf ("\nfloat: \n"); printf ("x = %.17g\n", xf); printf ("s1 = %.17g\n", s1f); s1l = tanl (xl); printf ("\nlong double: \n"); printf ("x = %.17Lg\n", xl); printf ("s1 = %.17Lg\n", s1l); return 0; } On x86-64: double: x = 1e+22 s1 = -1.6287782256068988 float: x = 9.9999997781963084e+21 s1 = -1.0810239315032959 long double: x = 1e+22 s1 = -0.52180662513577755 And on x86: double: x = 1e+22 s1 = -0.52180662513577758 float: x = 9.9999997781963084e+21 s1 = -0.29305437207221985 long double: x = 1e+22 s1 = -0.52180662513577755 The correct result of tan (1e22) is: s1 = -1.6287782256068988 -- 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] 6+ messages in thread
* [Bug math/13854] tan() is incorrect for large inputs on x86_64 and x86 2012-03-15 15:14 [Bug math/13854] New: tan() is incorrect for large inputs on x86_64 and x86 aj at suse dot de @ 2012-03-15 15:38 ` aj at suse dot de 2012-03-16 20:13 ` jsm28 at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: aj at suse dot de @ 2012-03-15 15:38 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=13854 Andreas Jaeger <aj at suse dot de> changed: What |Removed |Added ---------------------------------------------------------------------------- Blocks|13851, 13852 | -- 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] 6+ messages in thread
* [Bug math/13854] tan() is incorrect for large inputs on x86_64 and x86 2012-03-15 15:14 [Bug math/13854] New: tan() is incorrect for large inputs on x86_64 and x86 aj at suse dot de 2012-03-15 15:38 ` [Bug math/13854] " aj at suse dot de @ 2012-03-16 20:13 ` jsm28 at gcc dot gnu.org 2013-06-03 16:05 ` carlos at redhat dot com ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: jsm28 at gcc dot gnu.org @ 2012-03-16 20:13 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=13854 Joseph Myers <jsm28 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED --- Comment #1 from Joseph Myers <jsm28 at gcc dot gnu.org> 2012-03-16 20:11:02 UTC --- Fixed by: commit 11b90b9f504df5b2da91ce3a06c1657d99e4a95f Author: Joseph Myers <joseph@codesourcery.com> Date: Fri Mar 16 20:05:04 2012 +0000 Fix tan, tanl for large inputs. -- 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] 6+ messages in thread
* [Bug math/13854] tan() is incorrect for large inputs on x86_64 and x86 2012-03-15 15:14 [Bug math/13854] New: tan() is incorrect for large inputs on x86_64 and x86 aj at suse dot de 2012-03-15 15:38 ` [Bug math/13854] " aj at suse dot de 2012-03-16 20:13 ` jsm28 at gcc dot gnu.org @ 2013-06-03 16:05 ` carlos at redhat dot com 2013-06-03 17:47 ` carlos at redhat dot com 2014-06-26 13:52 ` fweimer at redhat dot com 4 siblings, 0 replies; 6+ messages in thread From: carlos at redhat dot com @ 2013-06-03 16:05 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=13854 Carlos O'Donell <carlos at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Depends on| |15563 -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug math/13854] tan() is incorrect for large inputs on x86_64 and x86 2012-03-15 15:14 [Bug math/13854] New: tan() is incorrect for large inputs on x86_64 and x86 aj at suse dot de ` (2 preceding siblings ...) 2013-06-03 16:05 ` carlos at redhat dot com @ 2013-06-03 17:47 ` carlos at redhat dot com 2014-06-26 13:52 ` fweimer at redhat dot com 4 siblings, 0 replies; 6+ messages in thread From: carlos at redhat dot com @ 2013-06-03 17:47 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=13854 Bug 13854 depends on bug 15563, which changed state. Bug 15563 Summary: sincos() is incorrect for long double and large inputs on x86_64 http://sourceware.org/bugzilla/show_bug.cgi?id=15563 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug math/13854] tan() is incorrect for large inputs on x86_64 and x86 2012-03-15 15:14 [Bug math/13854] New: tan() is incorrect for large inputs on x86_64 and x86 aj at suse dot de ` (3 preceding siblings ...) 2013-06-03 17:47 ` carlos at redhat dot com @ 2014-06-26 13:52 ` fweimer at redhat dot com 4 siblings, 0 replies; 6+ messages in thread From: fweimer at redhat dot com @ 2014-06-26 13:52 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=13854 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] 6+ messages in thread
end of thread, other threads:[~2014-06-26 13:52 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-03-15 15:14 [Bug math/13854] New: tan() is incorrect for large inputs on x86_64 and x86 aj at suse dot de 2012-03-15 15:38 ` [Bug math/13854] " aj at suse dot de 2012-03-16 20:13 ` jsm28 at gcc dot gnu.org 2013-06-03 16:05 ` carlos at redhat dot com 2013-06-03 17:47 ` carlos at redhat dot com 2014-06-26 13:52 ` fweimer at redhat dot com
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