coding

 1Functional Specifications

Design a Verilog program that performs the basic arithmetic and logic operations (ALU) on two

3-bit binary inputs, and displays the outcome on 7-segments.

• Arithmetic operations: addition and subtraction

• Logic operations: AND and OR

• Displaying results:

– For addition and subtraction: display the result using decimal digits

– For logic AND and OR: display the result using binary digits

2 Objectives

Demonstrate the ability to

1. program in Verilog to describe digital logic circuit on behavioral and gate level;

2. use Xilinx ISE for coding and synthesizing the logic design;

3. use Spartan 3 development board to implement and verify the design.

i want like this cods  to use in the  Xilinx program 

this is Example 

module seg7(bcd, leds, control, enable);



input [3:0] bcd;



input [1:0] control;



output reg [1:7] leds;



output reg [3:0] enable;

always @ (control)



  case (control)



  2'b00: enable = 4'b1110;



  2'b01: enable = 4'b1101;



  2'b10: enable = 4'b1011;



  2'b11: enable = 4'b0111;



  endcase

 always @ (bcd)



  case (bcd)



  4'b0000: leds = 7'b0000001;



  4'b0001: leds = 7'b1001111;



  4'b0010: leds = 7'b0010010;



  4'b0011: leds = 7'b0000110;



  4'b0100: leds = 7'b1001100;



  4'b0101: leds = 7'b0100100;



  4'b0110: leds = 7'b0100000;



  4'b0111: leds = 7'b0001111;



  4'b1000: leds = 7'b0000000;



  4'b1001: leds = 7'b0000100;



  4'b1010: leds = 7'b0001000; 



  4'b1011: leds = 7'b1100000;



  4'b1100: leds = 7'b0110001;



  4'b1101: leds = 7'b1000010;



  4'b1110: leds = 7'b0010000;



  4'b1111: leds = 7'b0111000;



  default: leds = 7'bx;



 endcase



endmodule