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RTL Code for Shift and Add Multiplier

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• AIM: To design shift and add multiplier and Bypass zero feed A directly shift and add multiplier.
• RTL CODE FOR SHIFT AND ADD MULTIPLIER: module mult(product,multiplier,multiplicand); input [15:0] multiplier, multiplicand; output product; reg [31:0] product; reg c; reg [15:0] m; integer i; always @( multiplier or multiplicand ) begin
//initialize
product[31:16] = 16'd0; product[15:0] = multiplier; m = multiplicand; c = 1'd0;
//add,shift algorithm for unsigned multiplication. for(i=0; i<16; i=i+1) begin if(product[0]) begin {c,product[31:16]} = product[31:16] + m ; //shift product[31:0] = {c,product[31:1]}; c = 0; end else begin product[31:0] = {c,product[31:1]}; c = 0; end end end endmodule TEST BENCH: module mult_tst(); reg [15:0]multiplier,multiplicand; wire [31:0]product; integer i; mult m1 (product,multiplier,multiplicand); initial begin $monitor($time,"multiplier=%d ,multiplicand=%d ,product=%d",multiplier,multiplicand,product); for(i=0;i<8;i=i+1) begin multiplier=$random; multiplicand=$random; #10; end #200 $stop; end endmodule OUTPUT:

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