select_clk_buf.v

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`timescale 1ns/1ps

module  select_clk_buf #(
    parameter BUFFER_TYPE = "BUFR" // to use clr
    )(
        output o,
        input  i,
        input  clr // for BUFR_only
);
     generate
        if      (BUFFER_TYPE == "BUFG")  BUFG  clk1x_i (.O(o), .I(i));
        else if (BUFFER_TYPE == "BUFH")  BUFH  clk1x_i (.O(o), .I(i));
        else if (BUFFER_TYPE == "BUFR")  BUFR  clk1x_i (.O(o), .I(i), .CE(1'b1), .CLR(clr));
        else if (BUFFER_TYPE == "BUFMR") BUFMR clk1x_i (.O(o), .I(i));
        else if (BUFFER_TYPE == "BUFIO") BUFIO clk1x_i (.O(o), .I(i));
        else assign o = i;
    endgenerate

endmodule