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[Bug math/13922] New: expf (FLT_MAX) does not raise overflow exception on x86


http://sourceware.org/bugzilla/show_bug.cgi?id=13922

             Bug #: 13922
           Summary: expf (FLT_MAX) does not raise overflow exception on
                    x86
           Product: glibc
           Version: 2.15
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: unassigned@sourceware.org
        ReportedBy: jsm28@gcc.gnu.org
    Classification: Unclassified


On x86, expf (FLT_MAX) does not raise the OVERFLOW exception as it should. 
Testcase:

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

volatile float d = FLT_MAX;

int
main (void)
{
  feclearexcept (FE_ALL_EXCEPT);
  errno = 0;
  volatile float r = expf (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 ("%.18g %m\n", r);
  return 0;
}

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