module tb;
    logic [31:0] lhs, rhs;
    logic [2:0] funct3;
    logic taken, illegal;
    integer checks = 0;
    string trace_file;
    branch_compare dut (.*);
    task automatic check(input logic [2:0] function_code, input logic expected);
        funct3 = function_code; #1;
        if (taken !== expected || illegal) $fatal(1, "FAIL f=%b taken=%b illegal=%b", function_code, taken, illegal);
        checks += 1;
    endtask
    initial begin
        if ($value$plusargs("trace=%s", trace_file)) begin $dumpfile(trace_file); $dumpvars(0, tb); end
        lhs = 32'hffffffff; rhs = 1;
        check(0,0); check(1,1); check(4,1); check(5,0); check(6,0); check(7,1);
        funct3 = 2; #1;
        if (!illegal || taken) $fatal(1, "FAIL illegal");
        $display("PASS task01 conditions=%0d signed_lt=1 unsigned_lt=0 illegal=1", checks);
        $finish;
    end
endmodule