59. Absolute Value

module abs8_func (
    input  signed [7:0] a,
    output       [7:0] abs
);
    // ---------- Write function here----------
    function [7:0]abs8(input signed [7:0]x);
        begin
            abs8 = (x < 0) ? -x : x;
        end
    endfunction

    // Function called here
    assign abs = abs8(a);

endmodule