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* [Bug math/13851] New: sincosl(), sinl() and cosl() are incorrect for large inputs on x86_64 and x86
@ 2012-03-15 13:41 aj at suse dot de
  2012-03-15 13:48 ` [Bug math/13851] " aj at suse dot de
                   ` (10 more replies)
  0 siblings, 11 replies; 12+ messages in thread
From: aj at suse dot de @ 2012-03-15 13:41 UTC (permalink / raw)
  To: glibc-bugs

http://sourceware.org/bugzilla/show_bug.cgi?id=13851

             Bug #: 13851
           Summary: sincosl(), sinl() and cosl() are incorrect for large
                    inputs on x86_64 and x86
           Product: glibc
           Version: 2.15
            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
    Classification: Unclassified


+++ This bug was initially created as a clone of Bug #13658 +++

sincosl() is inaccurate for large inputs on x86_64: with glibc 2.13,

#define _GNU_SOURCE
#include <stdio.h>
#include <math.h>

int main (void)
{
  volatile long double x = 1.0e22;
  long double s1, s2, c1;

  sincosl (x, &s1, &c1);
  s2 = sinl (x);
  printf ("s1 = %.17Lg\n", s1);
  printf ("s2 = %.17Lg\n", s2);
  return 0;
}

outputs:
s1 = -0.63300455357085282
s2 = -0.63300455357085282

Correct output would be:
0.85220084976718879

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^ permalink raw reply	[flat|nested] 12+ messages in thread
end of thread, other threads:[~2014-06-26 13:58 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-03-15 13:41 [Bug math/13851] New: sincosl(), sinl() and cosl() are incorrect for large inputs on x86_64 and x86 aj at suse dot de
2012-03-15 13:48 ` [Bug math/13851] " aj at suse dot de
2012-03-15 14:58 ` [Bug math/13851] sincosl(), sinl() and cosl(), tanl() " aj at suse dot de
2012-03-15 15:01 ` aj at suse dot de
2012-03-15 15:11 ` aj at suse dot de
2012-03-15 15:33 ` aj at suse dot de
2012-03-15 15:34 ` aj at suse dot de
2012-03-16 12:38 ` jsm28 at gcc dot gnu.org
2012-03-16 20:11 ` 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 13:58 ` fweimer at redhat dot com

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