_primary.vhd

this come from alter ,you can look and find it on line about h263.

library verilog;
use verilog.vl_types.all;
entity chien is
    generic(
        swidth          : integer := 8;
        nchien          : integer := 10;
        maxt            : integer := 8;
        twidth          : integer := 4;
        st0             : integer := 0;
        st_eval         : integer := 1;
        st_next         : integer := 2;
        st_evallast     : integer := 3;
        st_nextlast0    : integer := 4;
        st_nextlast1    : integer := 5;
        st_getjcs       : integer := 6;
        st_x0           : integer := 7;
        st_xactive      : integer := 8;
        st_xinactive    : integer := 9;
        st_end0         : integer := 10;
        st_end1         : integer := 11;
        stom_0          : integer := 0;
        st_omega0       : integer := 1;
        st_omega1       : integer := 2;
        st_omegaend     : integer := 3
    );
    port(
        async_reset     : in     vl_logic;
        clk             : in     vl_logic;
        enable_i        : in     vl_logic;
        chienstart_i    : in     vl_logic;
        switchpos_i     : in     vl_logic;
        validword_i     : in     vl_logic;
        success_i       : in     vl_logic;
        k_i             : in     vl_logic_vector;
        t_i             : in     vl_logic_vector;
        s_i             : in     vl_logic_vector;
        e_i             : in     vl_logic_vector;
        ee_i            : in     vl_logic_vector;
        v_i             : in     vl_logic_vector;
        omegaindex_i    : in     vl_logic_vector;
        xindex_i        : in     vl_logic_vector;
        invxindex_i     : in     vl_logic_vector;
        posindex_i      : in     vl_logic_vector;
        chiendone_o     : out    vl_logic;
        validword_o     : out    vl_logic;
        success_o       : out    vl_logic;
        k_o             : out    vl_logic_vector;
        t_o             : out    vl_logic_vector;
        v_o             : out    vl_logic_vector;
        omega_o         : out    vl_logic_vector;
        x_o             : out    vl_logic_vector;
        invx_o          : out    vl_logic_vector;
        outposc_o       : out    vl_logic_vector;
        sindex_o        : out    vl_logic_vector;
        eindex_o        : out    vl_logic_vector;
        eeindex_o       : out    vl_logic_vector;
        startforney_o   : out    vl_logic
    );
end chien;