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* [Bug math/13852] New: sincosf(), sinf(), cosf() is incorrect for large inputs on x86_64 and x86
@ 2012-03-15 13:46 aj at suse dot de
  2012-03-15 14:57 ` [Bug math/13852] sincosf(), sinf(), cosf(), tanl() are " aj at suse dot de
                   ` (9 more replies)
  0 siblings, 10 replies; 11+ messages in thread
From: aj at suse dot de @ 2012-03-15 13:46 UTC (permalink / raw)
  To: glibc-bugs

http://sourceware.org/bugzilla/show_bug.cgi?id=13852

             Bug #: 13852
           Summary: sincosf(), sinf(), cosf() is 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
            Blocks: 13851
    Classification: Unclassified


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

sincosf() 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 float x = 1.0e22;
  float s1, s2, c1;

  sincosf (x, &s1, &c1);
  s2 = sinf (x);
  printf ("s1 = %.17g\n", s1);
  printf ("s2 = %.17g\n", s2);
  return 0;
}

outputs:
s1 = 0.28122705221176147
s2 = 0.28122705221176147

Correct value:
0.85220084976718879

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^ permalink raw reply	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2014-06-26 13:57 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-03-15 13:46 [Bug math/13852] New: sincosf(), sinf(), cosf() is incorrect for large inputs on x86_64 and x86 aj at suse dot de
2012-03-15 14:57 ` [Bug math/13852] sincosf(), sinf(), cosf(), tanl() are " aj at suse dot de
2012-03-15 15:00 ` [Bug math/13852] sincosf(), sinf(), cosf(), tanf() " aj at suse dot de
2012-03-15 15:09 ` aj at suse dot de
2012-03-15 15:35 ` aj at suse dot de
2012-03-15 15:39 ` aj at suse dot de
2012-03-15 15:47 ` [Bug math/13852] sincosf(), sinf(), cosf(), tanf() are incorrect for large inputs on x86 aj at suse dot de
2012-03-15 17:07 ` aj at suse dot de
2013-06-03 16:05 ` carlos at redhat dot com
2013-06-03 17:47 ` carlos at redhat dot com
2014-06-26 13:57 ` fweimer at redhat dot com

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