booth multiplier code

[venkatagovardhan]

hai i want 8 bit booth multiplier code

 

[vassu426]

This is the code for 4bit multiplication..... now try 8bit from this...


`timescale 1ns / 1ps

module booth_multiplier(
input clk,
input [3:0] in_a,
input [3:0] in_b,
output [7:0] out);
reg [7:0] sig;
reg temp;
integer i;

always@(posedge clk)
begin
sig=0;
temp=0;

for(i=0;i<=3;i=i+1)
begin

case ({in_b,temp})
2'b00:sig = sig;
2'b01:sig[7:4] = sig[7:4] + in_a;
2'b10:sig[7:4] = sig[7:4] -in_a;
2'b11:sig = sig;
default:sig=10'b0;
endcase

temp = in_b;
sig = sig>>1; // right shift
sig[7]=sig[6]; // sign extend
end

end
assign out=sig;
endmodule