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[Bug math/14337] New: clog, clog10 spurious underflows


http://sourceware.org/bugzilla/show_bug.cgi?id=14337

             Bug #: 14337
           Summary: clog, clog10 spurious underflows
           Product: glibc
           Version: 2.16
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: unassigned@sourceware.org
        ReportedBy: jsm28@gcc.gnu.org
    Classification: Unclassified


On arguments with one part small and one large, the scaling done in clog and
clog10 to avoid overflows in hypot can cause spurious underflow exceptions. 
For example, on x86_64, clog (0x1p-1074 + 0x1.fp1023i) raises a spurious
underflow exception.

Working on a fix.

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