LUT无法复用

LUT无法复用

 

最近在看特权的深入浅出玩转FPGA  发现里面有个关于讨论LUT无法复用的例子，感觉不错，拿出来和广大初学者共享

程序源代码：

module  LUT           (                              
                    clk,                                         
                    a,                                           

                    b,
                    c,
                    d,
                    e,
                    f,
                    g,
                   dout,
                   fout
                          );
    
input                     clk;
input                     a;
input                     b;
input                     c;
input                     d;
input                     e;
input                     f;
input                     g;
output                    dout;
output                    fout;

 

reg                       dout;
reg                       fout;

always@(posedge clk)
begin
  dout<=a&b&c&d&e;
  fout<=f|g;
end
 
endmodule