[Bug libstdc++/54036] Negating a DFP NAN in C++ produces NAN not -NAN

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54036

--- Comment #1 from Peter Bergner <bergner at gcc dot gnu.org> 2012-07-24 21:07:58 UTC ---
Author: bergner
Date: Tue Jul 24 21:07:53 2012
New Revision: 189824

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189824
Log:
    Backport prospective patch from mainline

libstdc++-v3/
        PR libstdc++/54036
        * include/decimal/decimal.h (_DEFINE_DECIMAL_UNARY_OP): Use _Op as
        a unary operator.

gcc/testsuite/
        PR libstdc++/54036
        * g++.dg/dfp/pr54036-1.C: New test.
        * g++.dg/dfp/pr54036-2.C: Likewise.
        * g++.dg/dfp/pr54036-3.C: Likewise.

Added:
    branches/ibm/gcc-4_7-branch/gcc/testsuite/g++.dg/dfp/pr54036-1.C
    branches/ibm/gcc-4_7-branch/gcc/testsuite/g++.dg/dfp/pr54036-2.C
    branches/ibm/gcc-4_7-branch/gcc/testsuite/g++.dg/dfp/pr54036-3.C
    branches/ibm/gcc-4_7-branch/libstdc++-v3/ChangeLog.ibm
Modified:
    branches/ibm/gcc-4_7-branch/gcc/testsuite/ChangeLog.ibm
    branches/ibm/gcc-4_7-branch/libstdc++-v3/include/decimal/decimal.h