Subversion Repositories xilinx_virtex_fp_library

`timescale 1ns / 1ps

//////////////////////////////////////////////////////////////////////////////////

// Company:     UPT

// Engineer:    Constantina-Elena Gavriliu

// 

// Create Date:    16:09:49 02/07/2014 

// Design Name: 

// Module Name:    tb_adder 

// Project Name: 

// Target Devices: 

// Tool versions: 

// Description: TestBench

//                              //do not take into consideration cases for which the operation generates a NaN or Infinity exception (with corresponding sign) when initial "special cases" are not such exceptions

// Dependencies:        DualPathFPAdder

//

// Revision: 

// Revision 0.01 - File Created

// Additional Comments: 

//

//////////////////////////////////////////////////////////////////////////////////

`define input_file "test_add.input"

module tb_adder;

        reg clk, rst, start;

        reg [34:0] a_number_i_next;

        reg [34:0] b_number_i_next;

        reg unnecessary;

        reg [34:0] result_next;

        wire [34:0] resulting_number_o;

        integer f;

        integer i;

        real correct_cases, incorrect_cases;

        integer statusI, statusJ;

        wire correct;

        initial

                begin

                        i = 0;

                        correct_cases = 0;

                        incorrect_cases = 0;

                        clk = 1;

                        rst = 0;

                        f = $fopen(`input_file, "r");

                        while (!$feof(f))

                                begin

                                        statusI = $fscanf(f,"%35b %35b\n",a_number_i_next,b_number_i_next);

                                        statusJ = $fscanf(f,"%1b %35b\n",unnecessary,result_next);

                                        i = i + 1;

                                        @(posedge clk);

                                        @(posedge clk);

                                        @(posedge clk);

                                        if (correct)

                                                correct_cases = correct_cases + 1;

                                        else

                                                begin

                                                        incorrect_cases = incorrect_cases + 1;

                                                        $display("Error occured at index #%d \n \tExpDiff = %d\n",i, a_number_i_next[31:24] - b_number_i_next[31:24]);

                                                end

                        end

                        $display("Correct cases: %d \nIncorrect cases: %d", correct_cases, incorrect_cases);

                        $display("\tPercentage = %f ", correct_cases/200.07);

                        $stop();

      end

        assign correct = (result_next[31:0] == resulting_number_o[31:0] || result_next[31:0] == 32'd0)? 1 : 0;

        always #2       clk = ~clk;

        DualPathFPAdder #(

                                                .size_mantissa  (25))

                DualPathFPAdder_instance (

                                                                                .a_number_i         (a_number_i_next    ),

                                                                                .b_number_i         (b_number_i_next    ),

                                                                                .sub                (1'b0               ),

                                                                                .resulted_number_o      (resulting_number_o ));

endmodule