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[Bug math/18951] New: tgamma missing underflows


https://sourceware.org/bugzilla/show_bug.cgi?id=18951

            Bug ID: 18951
           Summary: tgamma missing underflows
           Product: glibc
           Version: 2.22
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: jsm28 at gcc dot gnu.org
  Target Milestone: ---

tgamma functions can sometimes miss underflow exceptions.  E.g., for float on
x86_64:

Failure: tgamma (-0x2.3fe04p+4): Exception "Underflow" not set

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