CodeMirror

// Literals

1'b0

1'bx

1'bz

16'hDC78

'hdeadbeef

'b0011xxzz

1234

32'd5678

3.4e6

-128.7

​

// Macro definition

`define BUS_WIDTH = 8;

​

// Module definition

module block(

  input                   clk,

  input                   rst_n,

  input  [`BUS_WIDTH-1:0] data_in,

  output [`BUS_WIDTH-1:0] data_out

);

  always @(posedge clk or negedge rst_n) begin

​

    if (~rst_n) begin

      data_out <= 8'b0;

    end else begin

      data_out <= data_in;

    end

    if (~rst_n)

      data_out <= 8'b0;

    else

      data_out <= data_in;

    if (~rst_n)

      begin

        data_out <= 8'b0;

      end

    else

      begin

        data_out <= data_in;

      end

​

  end

endmodule

​

// Class definition

class test;

​

  /**

   * Sum two integers

   */

  function int sum(int a, int b);

    int result = a + b;

    string msg = $sformatf("%d + %d = %d", a, b, result);

    $display(msg);

    return result;

  endfunction

  task delay(int num_cycles);

    repeat(num_cycles) #1;

  endtask

endclass

​

​