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* [Bug math/13921] New: y0l, y1l, ynl of -LDBL_MAX raise spurious overflow exception
@ 2012-03-28  0:04 jsm28 at gcc dot gnu.org
  2012-03-28  9:55 ` [Bug math/13921] " jsm28 at gcc dot gnu.org
  2014-06-26 13:39 ` fweimer at redhat dot com
  0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2012-03-28  0:04 UTC (permalink / raw)
  To: glibc-bugs

http://sourceware.org/bugzilla/show_bug.cgi?id=13921

             Bug #: 13921
           Summary: y0l, y1l, ynl of -LDBL_MAX raise spurious overflow
                    exception
           Product: glibc
           Version: 2.15
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: unassigned@sourceware.org
        ReportedBy: jsm28@gcc.gnu.org
    Classification: Unclassified


y0l, y1l, and ynl, applied to -LDBL_MAX, raise a spurious OVERFLOW exception in
addition to a correct INVALID exception; tested x86.  Example testcase:

#include <errno.h>
#include <fenv.h>
#include <math.h>
#include <stdio.h>
#include <float.h>

volatile long double d = -LDBL_MAX;

int
main (void)
{
  feclearexcept (FE_ALL_EXCEPT);
  errno = 0;
  volatile long double r = ynl (2, d);
  if (fetestexcept (FE_DIVBYZERO))
    printf ("DIVBYZERO ");
  if (fetestexcept (FE_INEXACT))
    printf ("INEXACT ");
  if (fetestexcept (FE_INVALID))
    printf ("INVALID ");
  if (fetestexcept (FE_OVERFLOW))
    printf ("OVERFLOW ");
  if (fetestexcept (FE_UNDERFLOW))
    printf ("UNDERFLOW ");
  printf ("%.18Lg %m\n", r);
  return 0;
}

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-- links below jump to the message on this page --
2012-03-28  0:04 [Bug math/13921] New: y0l, y1l, ynl of -LDBL_MAX raise spurious overflow exception jsm28 at gcc dot gnu.org
2012-03-28  9:55 ` [Bug math/13921] " jsm28 at gcc dot gnu.org
2014-06-26 13:39 ` fweimer at redhat dot com

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