59. Absolute Value

How do you plan to solve it?

module abs8_func (
    input  signed [7:0] a,
    output       [7:0] abs
);

    function [7:0] abs8(input signed [7:0] pp);
        if (pp[7])
            abs8 = -pp;   // 2's complement
        else
            abs8 = pp;
    endfunction

    assign abs = abs8(a);

endmodule