[Bug math/11451] New: atan2 leaves overflow bit set in status register

["geoff at dyalog dot com" <sourceware-bugzilla at sourceware dot org>]

eglibc-2.10.1/sysdeps/ieee754/dbl-64
e_tan2.c line: 406 calls
EMULV in dla.h which overflows

test case
#include <stdio.h>
#include <math.h>
#include <float.h>
#include <fenv.h>

double call_atan2(double x, double y)
        {
        volatile double a = x;
        volatile double b = y;
        volatile double r = atan2(x, y);

        return r;
        }

int main(void)
        {
        double piby4 = call_atan2(DBL_MAX, DBL_MAX);
        fexcept_t fe = fetestexcept(FE_OVERFLOW);
        char *word = fe ? "overflowed" : "";

        printf("atan2(%e, %e) => %e %s\n", DBL_MAX, DBL_MAX, piby4, word);
        return 0;
        }

-- 
           Summary: atan2 leaves overflow bit set in status register
           Product: glibc
           Version: 2.10
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: aj at suse dot de
        ReportedBy: geoff at dyalog dot com
                CC: glibc-bugs at sources dot redhat dot com
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=11451

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