Subversion Repositories xilinx_virtex_fp_library

`timescale 1ns / 1ps

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

// Company:     UPT

// Engineer:    Constantina-Elena Gavriliu

// 

// Create Date:    17:41:11 11/04/2013 

// Design Name: 

// Module Name:    effective_op 

// Project Name: 

// Target Devices: 

// Tool versions: 

// Description: Compute effective operation 

//

// Dependencies: 

//

// Revision: 

// Revision 0.01 - File Created

// Additional Comments: 

//

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

module effective_op(    input a_sign,

                                                        input b_sign,

                                                        input sub,

                                                        output reg eff_op);

        always

                @(*)

        begin

                case ({sub,a_sign, b_sign})

                        3'b000: eff_op = 0;

                        3'b001: eff_op = 1;

                        3'b010: eff_op = 1;

                        3'b011: eff_op = 0;

                        3'b100: eff_op = 1;

                        3'b101: eff_op = 0;

                        3'b110: eff_op = 0;

                        3'b111: eff_op = 1;

                endcase

        end

endmodule