Encoder 8 to 3 (without priority)

module encoder8_3(enable, din,  d_out);

input enable;    

input [7:0] din;

output [2:0] d_out;                     

reg [2:0] d_out;

always @ (din, enable)

begin

     if(enable==1 )

           d_out=3’b000;

     else

           case (din)

           8'b00000001: d_out = 3'b000;

           8'b00000010: d_out = 3'b001;

           8'b00000100: d_out = 3'b010;

           8'b00001000: d_out = 3'b011;

           8'b00010000: d_out = 3'b100;

           8'b00100000: d_out = 3'b101;

           8'b01000000: d_out = 3'b110;

           8'b10000000: d_out = 3'b111;

          default: d_out =3'bxxx;

          endcase

end

endmodule

inputs									outputs
enable	din(0)	din(1)	din(2)	din(3)	din(4)	din(5)	din(6)	din(7)	d_out (0)	d_out (1)	d_out (2)
1	x	x	x	x	x	x	x	x	0	0	0
0	1	0	0	0	0	0	0	0	0	0	0
0	0	1	0	0	0	0	0	0	0	0	1
0	0	0	1	0	0	0	0	0	0	1	0
0	0	0	0	1	0	0	0	0	0	1	1
0	0	0	0	0	1	0	0	0	1	0	0
0	0	0	0	0	0	1	0	0	1	0	1
0	0	0	0	0	0	0	1	0	1	1	0
0	0	0	0	0	0	0	0	1	1	1	1