2003-12-18 Michael Snyder <[email protected]>

2003-12-18  Michael Snyder  <[email protected]>

        * gencode.c (expand_opcode): Simplify and reorganize.
        Eliminate "shift" parameter.  Eliminate "4 bits at a time"
        assumption.  Flatten switch statement to a single level.
        Add "eeee" token for even-numbered registers.
        (bton): Delete.
        (fsca): Use "eeee" token.
        (ppi_moves): Rename to "expand_ppi_movxy".  Do the ddt
        [movx/movy] expansion here, as well as the ppi expansion.
        (gensim_caselist): Accept 'eeee' along with 'nnnn'.