[Bug target/48258] New: Add VSX support for float/double vector reductions & improve float insert/extract

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48258

           Summary: Add VSX support for float/double vector reductions &
                    improve float insert/extract
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: target
        AssignedTo: meissner@gcc.gnu.org
        ReportedBy: meissner@gcc.gnu.org
              Host: powerpc64-linux
            Target: powerpc64-linux
             Build: powerpc64-linux


Right now, the powerpc compiler does not do support for float and double vector
reductions.  For float in particular, the compiler does the code, and then
stores the vector in the stack to extract the bottom element.  With VSX it is
possible to do vector reductions in fewer instructions and to eliminate the
store.