* configure.in (cgen_files): Add cgen-bitset.lo.
        (ta): Add cgen-bitset.lo when arch==bfd_cris_arch.
        * Makefile.am (CFILES): Add cgen-bitset.c.
        (ALL_MACHINES): Add cgen-bitset.lo.
        (cgen-bitset.lo): New target.
        * cgen-opc.c (cgen_bitset_create, cgen_bitset_init, cgen_bitset_clear)
        (cgen_bitset_add, cgen_bitset_set, cgen_bitset_contains)
        (cgen_bitset_compare, cgen_bitset_intersect_p, cgen_bitset_copy)
        (cgen_bitset_union): Moved from here ...
        * cgen-bitset.c: ... to here. New file.
        * Makefile.in: Regenerated.
        * configure: Regenerated.