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[Bug math/16339] New: log1p missing underflows


https://sourceware.org/bugzilla/show_bug.cgi?id=16339

            Bug ID: 16339
           Summary: log1p missing underflows
           Product: glibc
           Version: 2.19
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: jsm28 at gcc dot gnu.org

log1p (subnormal) produces an inexact result so should raise the underflow
exception.  But on x86_64, log1pf (0x1p-149) and log1p (0x1p-1074) do not raise
that exception,

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