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[Bug math/16560] New: spurious underflow exception from exp2


https://sourceware.org/bugzilla/show_bug.cgi?id=16560

            Bug ID: 16560
           Summary: spurious underflow exception from exp2
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: zimmerma+gcc at loria dot fr

on x86_64 I get:

Testing function exp2 for exponent 0 [seed=11871].
 rounding mode MPFR_RNDN:
      wrong underflow flag: mpfr gives 0, library 16
      x=8.000000@-38
      library gives 1.000000
      mpfr    gives 1.000000

since the result is 1, there should be no underflow exception!

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