ModelSim实现16位全加器和16位全加器的testbench

以下是16位全加器的Verilog代码：

module full_adder(
  input wire a,
  input wire b,
  input wire cin,
  output reg sum,
  output reg cout
);

  always @(*) begin
    sum = a ^ b ^ cin;
    cout = (a & b) | (a & cin) | (b & cin);
  end

endmodule

module sixteen_bit_adder(
  input wire [15:0] a,
  input wire [15:0] b,
  input wire cin,
  output reg [15:0] sum,
  output reg cout
);

  reg [15:0] s;
  reg c;

  always @(*) begin
    s[0] = cin;
    for (int i = 0; i < 15; i = i + 1) begin
      full_adder fa(
        .a(a[i]),
        .b(b[i]),
        .cin(s[i]),
        .sum(s[i+1]),
        .cout(c)
      );
    end
    sum = s;
    cout = c;
  end

endmodule

以下是16位全加器的testbench代码：

module sixteen_bit_adder_tb;

  // Inputs
  reg [15:0] a;
  reg [15:0] b;
  reg cin;

  // Outputs
  wire [15:0] sum;
  wire cout;

  // Instantiate the Unit Under Test (UUT)
  sixteen_bit_adder uut (
    .a(a),
    .b(b),
    .cin(cin),
    .sum(sum),
    .cout(cout)
  );

  initial begin
    // Initialize Inputs
    a = 16'hFFFF;
    b = 16'h0001;
    cin = 0;

    // Wait 100 ns for global reset to finish
    #100;

    // Add stimulus here
    // ...

    // Add clock here
    // ...

    // Check the outputs
    if (sum !== 16'h0000 || cout !== 1'b0) begin
      $display("Test failed!");
    end else begin
      $display("Test passed!");
    end

    // Add cleanup code here
    // ...

    // Finish the simulation
    $finish;
  end

endmodule

请注意，这只是一个简单的测试台，您需要根据您的需求添加适当的输入刺激和时钟。