generic_receive_fifo.v

一个关于以太网MAC核和介质无关接口的原代码,希望对大家有帮助!

   	  end
   	  else if(FIFO_SIZE == 2048)
   	  begin
        assign HOST_WR_ADDR[10] = HOST_WR_ADDRGRAY[10];
        assign HOST_WR_ADDR[9] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9];
        assign HOST_WR_ADDR[8] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8];
        assign HOST_WR_ADDR[7] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7];
        assign HOST_WR_ADDR[6] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6];
        assign HOST_WR_ADDR[5] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5];
        assign HOST_WR_ADDR[4] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4];
        assign HOST_WR_ADDR[3] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3];
        assign HOST_WR_ADDR[2] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2];
        assign HOST_WR_ADDR[1] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ 
                            HOST_WR_ADDRGRAY[1];
        assign HOST_WR_ADDR[0] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ 
                            HOST_WR_ADDRGRAY[1] ^ HOST_WR_ADDRGRAY[0];
   	  end
   	  else if(FIFO_SIZE == 4096)
   	  begin
        assign HOST_WR_ADDR[11] = HOST_WR_ADDRGRAY[11];
        assign HOST_WR_ADDR[10] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10];
        assign HOST_WR_ADDR[9] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9];
        assign HOST_WR_ADDR[8] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                            HOST_WR_ADDRGRAY[8];
        assign HOST_WR_ADDR[7] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                            HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7];
        assign HOST_WR_ADDR[6] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                            HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6];
        assign HOST_WR_ADDR[5] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                            HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                            HOST_WR_ADDRGRAY[5];
        assign HOST_WR_ADDR[4] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                            HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                            HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4];
        assign HOST_WR_ADDR[3] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                            HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                            HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3];
        assign HOST_WR_ADDR[2] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                            HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                            HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^
                            HOST_WR_ADDRGRAY[2];
        assign HOST_WR_ADDR[1] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                            HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                            HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^
                            HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1];
        assign HOST_WR_ADDR[0] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                            HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                            HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^
                            HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1] ^ HOST_WR_ADDRGRAY[0];
   	  end
   	  else if(FIFO_SIZE == 8192)
   	  begin
        assign HOST_WR_ADDR[12] = HOST_WR_ADDRGRAY[12];
        assign HOST_WR_ADDR[11] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11];
        assign HOST_WR_ADDR[10] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10];
        assign HOST_WR_ADDR[9] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9];
        assign HOST_WR_ADDR[8] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8];
        assign HOST_WR_ADDR[7] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7];
        assign HOST_WR_ADDR[6] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                            HOST_WR_ADDRGRAY[6];
        assign HOST_WR_ADDR[5] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                            HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5];
        assign HOST_WR_ADDR[4] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                            HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4];
        assign HOST_WR_ADDR[3] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                            HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ 
                            HOST_WR_ADDRGRAY[3];
        assign HOST_WR_ADDR[2] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                            HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ 
                            HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2];
        assign HOST_WR_ADDR[1] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                            HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ 
                            HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1];
        assign HOST_WR_ADDR[0] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                            HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                            HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ 
                            HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1] ^ 
                            HOST_WR_ADDRGRAY[0];
   	  end
   	  else // FIFO_SIZE == 16384
   	  begin
        assign HOST_WR_ADDR[13] = HOST_WR_ADDRGRAY[13];
        assign HOST_WR_ADDR[12] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12];
        assign HOST_WR_ADDR[11] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11];
        assign HOST_WR_ADDR[10] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10];
        assign HOST_WR_ADDR[9] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9];
        assign HOST_WR_ADDR[8] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8];
        assign HOST_WR_ADDR[7] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7];
        assign HOST_WR_ADDR[6] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6];
        assign HOST_WR_ADDR[5] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5];
        assign HOST_WR_ADDR[4] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4];
        assign HOST_WR_ADDR[3] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3];
        assign HOST_WR_ADDR[2] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2];
        assign HOST_WR_ADDR[1] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ 
                            HOST_WR_ADDRGRAY[1];
        assign HOST_WR_ADDR[0] = HOST_WR_ADDRGRAY[13] ^ HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ 
                            HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                            HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                            HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ 
                            HOST_WR_ADDRGRAY[1] ^ HOST_WR_ADDRGRAY[0];
   	  end
    endgenerate
    */

    // CHANGES REQUIRED
    // Use the code below when Verilog 2001 generate statements are NOT supported...
    // Uncomment the code for the correct FIFO_SIZE...
    // (FIFO_SIZE == 512) 
    /*
    assign HOST_WR_ADDR[8] = HOST_WR_ADDRGRAY[8];
    assign HOST_WR_ADDR[7] = HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7];
    assign HOST_WR_ADDR[6] = HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6];
    assign HOST_WR_ADDR[5] = HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                       HOST_WR_ADDRGRAY[5];
    assign HOST_WR_ADDR[4] = HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                       HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4];
    assign HOST_WR_ADDR[3] = HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                       HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3];
    assign HOST_WR_ADDR[2] = HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                       HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^
                       HOST_WR_ADDRGRAY[2];
    assign HOST_WR_ADDR[1] = HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                       HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^
                       HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1];
    assign HOST_WR_ADDR[0] = HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                       HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^
                       HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1] ^ HOST_WR_ADDRGRAY[0];
    */
    // (FIFO_SIZE == 1024)
    assign HOST_WR_ADDR[9] = HOST_WR_ADDRGRAY[9];
    assign HOST_WR_ADDR[8] = HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8];
    assign HOST_WR_ADDR[7] = HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7];
    assign HOST_WR_ADDR[6] = HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                       HOST_WR_ADDRGRAY[6];
    assign HOST_WR_ADDR[5] = HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                       HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5];
    assign HOST_WR_ADDR[4] = HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                       HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4];
    assign HOST_WR_ADDR[3] = HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                       HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ 
                       HOST_WR_ADDRGRAY[3];
    assign HOST_WR_ADDR[2] = HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                       HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ 
                       HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2];
    assign HOST_WR_ADDR[1] = HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                       HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ 
                       HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1];
    assign HOST_WR_ADDR[0] = HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ 
                       HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ 
                       HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1] ^ 
                       HOST_WR_ADDRGRAY[0];
    // (FIFO_SIZE == 2048)
    /*
    assign HOST_WR_ADDR[10] = HOST_WR_ADDRGRAY[10];
    assign HOST_WR_ADDR[9] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9];
    assign HOST_WR_ADDR[8] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8];
    assign HOST_WR_ADDR[7] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                        HOST_WR_ADDRGRAY[7];
    assign HOST_WR_ADDR[6] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                        HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6];
    assign HOST_WR_ADDR[5] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                        HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5];
    assign HOST_WR_ADDR[4] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                        HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                        HOST_WR_ADDRGRAY[4];
    assign HOST_WR_ADDR[3] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                        HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                        HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3];
    assign HOST_WR_ADDR[2] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                        HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                        HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2];
    assign HOST_WR_ADDR[1] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                        HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                        HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ 
                        HOST_WR_ADDRGRAY[1];
    assign HOST_WR_ADDR[0] = HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ 
                        HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^ HOST_WR_ADDRGRAY[5] ^ 
                        HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^ HOST_WR_ADDRGRAY[2] ^ 
                        HOST_WR_ADDRGRAY[1] ^ HOST_WR_ADDRGRAY[0];
    */
    // (FIFO_SIZE == 4096)
    /*
    assign HOST_WR_ADDR[11] = HOST_WR_ADDRGRAY[11];
    assign HOST_WR_ADDR[10] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10];
    assign HOST_WR_ADDR[9] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9];
    assign HOST_WR_ADDR[8] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                        HOST_WR_ADDRGRAY[8];
    assign HOST_WR_ADDR[7] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                        HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7];
    assign HOST_WR_ADDR[6] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                        HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6];
    assign HOST_WR_ADDR[5] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                        HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                        HOST_WR_ADDRGRAY[5];
    assign HOST_WR_ADDR[4] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                        HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                        HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4];
    assign HOST_WR_ADDR[3] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                        HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                        HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3];
    assign HOST_WR_ADDR[2] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                        HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                        HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^
                        HOST_WR_ADDRGRAY[2];
    assign HOST_WR_ADDR[1] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                        HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                        HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^
                        HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1];
    assign HOST_WR_ADDR[0] = HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ HOST_WR_ADDRGRAY[9] ^
                        HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7] ^ HOST_WR_ADDRGRAY[6] ^
                        HOST_WR_ADDRGRAY[5] ^ HOST_WR_ADDRGRAY[4] ^ HOST_WR_ADDRGRAY[3] ^
                        HOST_WR_ADDRGRAY[2] ^ HOST_WR_ADDRGRAY[1] ^ HOST_WR_ADDRGRAY[0];
    */
    // (FIFO_SIZE == 8192)
    /*
    assign HOST_WR_ADDR[12] = HOST_WR_ADDRGRAY[12];
    assign HOST_WR_ADDR[11] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11];
    assign HOST_WR_ADDR[10] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10];
    assign HOST_WR_ADDR[9] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                        HOST_WR_ADDRGRAY[9];
    assign HOST_WR_ADDR[8] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                        HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8];
    assign HOST_WR_ADDR[7] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                        HOST_WR_ADDRGRAY[9] ^ HOST_WR_ADDRGRAY[8] ^ HOST_WR_ADDRGRAY[7];
    assign HOST_WR_ADDR[6] = HOST_WR_ADDRGRAY[12] ^ HOST_WR_ADDRGRAY[11] ^ HOST_WR_ADDRGRAY[10] ^ 
                        HOST_WR_ADDRGRA