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`timescale 1ps/1ps

module rd_comp_sel_tndudaq #(
    parameter WIDTH=10,
    parameter PIPELINE_OUT=0,
    parameter PIPELINE_CMP=0
) (
    input           clk,
input [WIDTH:0] in_0, // MSB=valid, WIDTH-1:0=ID

    input [WIDTH-1:0] base,
    input [1-1:0] shift_occurred, // indicates certain data shift shifted
    input [1-1:0] clr,    
    output logic sel,
    output logic [1-1:0] sel_index
);
logic [1-1:0] equal,equal_reg;
logic sel_int;
logic [1-1:0] sel_index_int;
logic [1-1:0] shift_occurred_reg;


compare_eq #( .WIDTH (WIDTH) ) com0 ( .in_a(in_0[WIDTH-1:0]), .in_b(base), .equal(equal[0]) );



generate 
    if (PIPELINE_CMP) begin : PIPELINE_CMP_OUT
        always @ (posedge clk) begin
            equal_reg <= equal;
            shift_occurred_reg <= shift_occurred;
        end
    end
    else begin : NO_PIPELINE_CMP_OUT
        assign equal_reg = equal;
        assign shift_occurred_reg = shift_occurred;
    end
endgenerate

rd_pri_mux_tndudaq pri_mux (
.in0             (equal_reg[0] && in_0[WIDTH]),

    .shift_index_out (shift_occurred_reg),
    .sel             (sel_int),
    .sel_index       (sel_index_int),
    .clr             (clr)

);

generate
    if (PIPELINE_OUT) begin
        always @ (posedge clk) begin
            sel       <= sel_int;
            sel_index <= sel_index_int;
        end
    end
    else begin
        assign sel = sel_int;
        assign sel_index = sel_index_int;
    end
endgenerate 
endmodule

