IMPLEMENTATION OF ALU USING CONDITIONAL OPERATOR

Arithmatic logic unit designed here perform addition, subtraction and lot of other functions based on selector.

Source code:
module alu(a,b,sl,carry,out);
input a,b,carry;
output [1:0]out;
input[5:0]sl;
assign out=(sl==5'b000100)? a&b:
            (sl==5'b001000)? a&~b:
            (sl==5'b001001)? a^b:
            (sl==5'b011001)? a+~b+carry:
            (sl==5'b010110)? a+b+carry:
            2'bzz;
endmodule

Simulation Code:

module test();

    reg a;

    reg b;

    reg [5:0]sl;

    reg carry;

    wire [1:0]out;

    alu aa(a,b,sl,carry,out);

    initial begin

    #5 a=1;

    #5 b=1;

    #5 carry=1;

       #15 sl=  5'b000100;

       #15 sl=  5'b010110;

        #15 sl= 5'b001111; 

       #15 sl=  5'b001001;   

     

    end

endmodule