dff_sim.v

module MISTRAL_FF(input D, CLK, ACn, ASn, EN, output reg Q);

parameter INIT = 1'b0;

initial Q = INIT;

always @(posedge CLK or negedge ACn or negedge ASn) begin
    if (!ACn) begin
        Q <= 0;
    end
    else if (!ASn) begin
        Q <= 1;
    end
    else begin
        if (EN) Q <= D;
    end
end

endmodule