module array_multiplier

(

  output [15:0]P,

  input [7:0]A,

  input [7:0]B

);

wire [55:0]Sum;

wire [6:0]Cout;

assign P[0] = A[0] & B[0];

//Level 1

ripple_carry_adder RCA1(Cout[0], Sum[7:0],   {1'b0, B[0] & A[7:1]}, B[1] & A[7:0],1'b0);

assign P[1] = Sum[0];

//Level 2

ripple_carry_adder RCA2(Cout[1], Sum[15:8],  {Cout[0], Sum[7:1]},   B[2] & A[7:0],1'b0);

assign P[2] = Sum[8];

//repeat....

//Level 7 (last level)

ripple_carry_adder RCA7(Cout[6], Sum[55:48], {Cout[5], Sum[47:41]}, B[7] & A[7:0],1'b0);

assign P[7] = Sum[48];

assign P[8] = Sum[49];

assign P[9] = Sum[50];

assign P[10]= Sum[51];

assign P[11]= Sum[52];

assign P[12]= Sum[53];

assign P[13]= Sum[54];

assign P[14]= Sum[55];

assign P[15]= Cout[6];

//module

module ripple_carry_adder

(

  output Cout, 

  output [7:0]Sum,  

  input [7:0]A, 

  input [7:0]B, 

  input Cin

);