reg[31:0] A;

integer I;

...

A=-1;

I=-1;//both A and I hold 32'hffffffff

//

if(I>32'h0)

    $display("I is positive.")

else$display("I is not positive");//PRints "I is not positive"

if(A>32'h0)

    $display("A is positive");//Prints "A is positive"

else$display("I is not positive");

module integer_reg(clk,negA,negI);

input clk;

wire[31:0]A;

integer I;

output reg negA;

output reg negI;

assign A=-3;

always @(posedge clk)

    begin

    I=-3;

    if(A<0)

       negA<=1;

       else negA<=0;

     if(I<0)

        negI<=1;

        else negI<=0;

        end

endmodule