[Bug math/20718] New: [powerpc] copysignl raises "invalid" for sNaN

["jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=20718

            Bug ID: 20718
           Summary: [powerpc] copysignl raises "invalid" for sNaN
           Product: glibc
           Version: 2.24
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: jsm28 at gcc dot gnu.org
  Target Milestone: ---
              Host: powerpc*-*-*

The powerpc implementations of copysignl, both powerpc32 and powerpc64, raise a
spurious "invalid" exception when the first argument is a signaling NaN.

Failure: copysign (sNaN, 0): Exception "Invalid operation" set
Failure: copysign (sNaN, -0): Exception "Invalid operation" set
Failure: copysign (-sNaN, 0): Exception "Invalid operation" set
Failure: copysign (-sNaN, -0): Exception "Invalid operation" set
Failure: copysign (sNaN, qNaN): Exception "Invalid operation" set
Failure: copysign (sNaN, -qNaN): Exception "Invalid operation" set
Failure: copysign (-sNaN, qNaN): Exception "Invalid operation" set
Failure: copysign (-sNaN, -qNaN): Exception "Invalid operation" set
Failure: copysign (sNaN, sNaN): Exception "Invalid operation" set
Failure: copysign (sNaN, -sNaN): Exception "Invalid operation" set
Failure: copysign (-sNaN, sNaN): Exception "Invalid operation" set
Failure: copysign (-sNaN, -sNaN): Exception "Invalid operation" set

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