* config/rs6000/rs6000.md (extenddftf2): Change to define_insn
        which copies first FPR and clears second.
        (extendsftf2): Same.
        (floatditf2): Fix typo.
        (floatsitf2): Same.
        (fix_trunctfdi2): Same.
        (fix_trunctfsi2): Same.

From-SVN: r57990