标题: 利用硬件嘀攀爀椀氀漀最鸀现开平方 [打印本页]

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作者: wxg1988    时间: 2011-12-2 16:43     标题: 利用硬件嘀攀爀椀氀漀最鸀现开平方

module sqrt
  #(parameter N = 8)(
  input [N-1:0]radical,
  output [N/2-1:0]resualt,
  output [N/2:0]remainder
  );
  parameter k = (N + N%2)/2; //toget the nearest even number of
  integer i;
  reg [N-1:0] r[0:k];
  reg [N:0] b[0:k];
  [email=always@(radical]always@(radical[/email])
  begin
   r[0]<=0;
   b[0]<=0;
  for(i=0;i<k;i =i+1)
  begin
   if (4*r +2*radical[N - 2*i - 1] + radical[N - 2*i - 2] >=4*b + 1)
   begin
    r[i+1]<= 4*r + 2*radical[N - 2*i  - 1]+ radical[N - 2*i - 2] - 4*b - 1;
    b[i+1]<= 2*b + 1;
   end
   else
   begin
    r[i+1]<= 4*r + 2*radical[N - 2*i - 1] + radical[N - 2*i- 2];
    b[i+1]<= 2*b;
   end
  end
  end
  assign resualt = b[k];
  assign remainder = r[k];
endmodule  

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