4X4 BOOTH MULTIPLIER

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4X4 BOOTH MULTIPLIER


module BOOTH_Multiplier(RESULT, X, Y);

  RESULT reg signed [7:0] RESULT;

  input signed [3:0] X,Y;

 reg [1:0] State;

  reg [5:0] K;

  reg e;

  reg [3:0] Z;


  always @(X,Y)

  begin

    RESULT = 8'd0;

    e = 1'b0;

    Z = -Y;

    

    for (K=0; K<4; K=K+1)

    begin

      State = { X[K], e };

      case(State)

        2'd2 : RESULT[7:4] = RESULT[7:4] + Z;

        2'd1 : RESULT[7:4] = RESULT[7:4] + Y;

      endcase

      RESULT = RESULT >> 1;

      RESULT[7] = RESULT[6];

      e=X[K];

      

    end

  end

  

endmodule

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