* mips.igen: Tag vr5000 instructions.

   * mips.igen: Tag vr5000 instructions.
        (ANDI): Was missing mipsIV model, fix assembler syntax.
        (do_c_cond_fmt): New function.
        (C.cond.fmt): Handle mips I-III which do not support CC field
        separatly.
        (bc1): Handle mips IV which do not have a delaed FCC separatly.
        (SDR): Mask paddr when BigEndianMem, not the converse as specified
        in IV3.2 spec.
        (DMULT, DMULTU): Force use of hosts 64bit multiplication.  Handle
        vr5000 which saves LO in a GPR separatly.
        * configure.in (enable-sim-igen): For vr5000, select vr5000
        specific instructions.
        * configure: Re-generate.