[Bug c++/12043] New: long double calcluation seems broken

["jlquinn at optonline dot net" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12043

           Summary: long double calcluation seems broken
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jlquinn at optonline dot net
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i686-pc-linux-gnu

While working on improved printf for libstdc++, I came across what appears to be
a problem with long double math.  In the attached code, I THINK that x.d is a
valid long double (96 bits of which 80 are actually used).  The test case cam
because I was trying to generate random long doubles to compare results and
getting problems.

The problem can be seen in the value of q1.