module CRC32_D8(DATA_IN, CLK, RESET, START, LOAD, CRC_IN, CRC_OUT);  input [7:0] DATA_IN;  input CLK;	  input RESET;  input START;  input LOAD;   input [31:0] CRC_IN;  output [31:0] CRC_OUT;  reg [31:0] CRC_OUT;  reg start_int;  reg [7:0] data_int;  always @(posedge CLK)begin  start_int <= START;  data_int <= DATA_IN;endalways @(posedge CLK or posedge RESET)  begin    if (RESET) begin        CRC_OUT = 0;    end    else if (start_int == 1) begin        CRC_OUT = nextCRC32_D8(data_int, CRC_OUT);    end     else if (LOAD == 1) begin        CRC_OUT = CRC_IN;    end           	  end///////////////////////////////////////////////////////////////////////// File:  CRC32_D64.v                             // Date:  Sun Nov 27 19:32:12 2005                                                      //                                                                     // Copyright (C) 1999-2003 Easics NV.                 // This source file may be used and distributed without restriction    // provided that this copyright statement is not removed from the file // and that any derivative work contains the original copyright notice// and the associated disclaimer.//// THIS SOURCE FILE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS// OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED// WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.//// Purpose: Verilog module containing a synthesizable CRC function//   * polynomial: (0 1 2 4 5 7 8 10 11 12 16 22 23 26 32)//   * data width: 64//                                                                     // Info: tools@easics.be//       http://www.easics.com                                  ///////////////////////////////////////////////////////////////////////  // polynomial: (0 1 2 3 4 5 7 8 10 11 12 16 22 23 26 32)  // data width: 8  // convention: the first serial data bit is D[7]  function [31:0] nextCRC32_D8;    input [7:0] Data;    input [31:0] CRC;    reg [7:0] D;    reg [31:0] C;    reg [31:0] NewCRC;  begin    D = Data;    C = CRC;    NewCRC[0] = D[6] ^ D[0] ^ C[24] ^ C[30];    NewCRC[1] = D[7] ^ D[6] ^ D[1] ^ D[0] ^ C[24] ^ C[25] ^ C[30] ^                 C[31];    NewCRC[2] = D[7] ^ D[6] ^ D[2] ^ D[1] ^ D[0] ^ C[24] ^ C[25] ^                 C[26] ^ C[30] ^ C[31];    NewCRC[3] = D[7] ^ D[6] ^ D[3] ^ D[2] ^ D[1] ^ D[0] ^ C[24] ^ C[25] ^                 C[26] ^ C[27] ^ C[30] ^ C[31];    NewCRC[4] = D[7] ^ D[6] ^ D[4] ^ D[3] ^ D[2] ^ D[1] ^ D[0] ^ C[24] ^                 C[25] ^ C[26] ^ C[27] ^ C[28] ^ C[30] ^ C[31];    NewCRC[5] = D[7] ^ D[6] ^ D[5] ^ D[4] ^ D[3] ^ D[2] ^ D[1] ^ D[0] ^                 C[24] ^ C[25] ^ C[26] ^ C[27] ^ C[28] ^ C[29] ^ C[30] ^                 C[31];    NewCRC[6] = D[7] ^ D[6] ^ D[5] ^ D[4] ^ D[3] ^ D[2] ^ D[1] ^ C[25] ^                 C[26] ^ C[27] ^ C[28] ^ C[29] ^ C[30] ^ C[31];    NewCRC[7] = D[7] ^ D[5] ^ D[4] ^ D[3] ^ D[2] ^ D[0] ^ C[24] ^ C[26] ^                 C[27] ^ C[28] ^ C[29] ^ C[31];    NewCRC[8] = D[5] ^ D[4] ^ D[3] ^ D[1] ^ D[0] ^ C[0] ^ C[24] ^ C[25] ^                 C[27] ^ C[28] ^ C[29];    NewCRC[9] = D[6] ^ D[5] ^ D[4] ^ D[2] ^ D[1] ^ C[1] ^ C[25] ^ C[26] ^                 C[28] ^ C[29] ^ C[30];    NewCRC[10] = D[7] ^ D[5] ^ D[3] ^ D[2] ^ D[0] ^ C[2] ^ C[24] ^ C[26] ^                  C[27] ^ C[29] ^ C[31];    NewCRC[11] = D[4] ^ D[3] ^ D[1] ^ D[0] ^ C[3] ^ C[24] ^ C[25] ^                  C[27] ^ C[28];    NewCRC[12] = D[6] ^ D[5] ^ D[4] ^ D[2] ^ D[1] ^ D[0] ^ C[4] ^ C[24] ^                  C[25] ^ C[26] ^ C[28] ^ C[29] ^ C[30];    NewCRC[13] = D[7] ^ D[6] ^ D[5] ^ D[3] ^ D[2] ^ D[1] ^ C[5] ^ C[25] ^                  C[26] ^ C[27] ^ C[29] ^ C[30] ^ C[31];    NewCRC[14] = D[7] ^ D[6] ^ D[4] ^ D[3] ^ D[2] ^ C[6] ^ C[26] ^ C[27] ^                  C[28] ^ C[30] ^ C[31];    NewCRC[15] = D[7] ^ D[5] ^ D[4] ^ D[3] ^ C[7] ^ C[27] ^ C[28] ^                  C[29] ^ C[31];    NewCRC[16] = D[5] ^ D[4] ^ D[0] ^ C[8] ^ C[24] ^ C[28] ^ C[29];    NewCRC[17] = D[6] ^ D[5] ^ D[1] ^ C[9] ^ C[25] ^ C[29] ^ C[30];    NewCRC[18] = D[7] ^ D[6] ^ D[2] ^ C[10] ^ C[26] ^ C[30] ^ C[31];    NewCRC[19] = D[7] ^ D[3] ^ C[11] ^ C[27] ^ C[31];    NewCRC[20] = D[4] ^ C[12] ^ C[28];    NewCRC[21] = D[5] ^ C[13] ^ C[29];    NewCRC[22] = D[0] ^ C[14] ^ C[24];    NewCRC[23] = D[6] ^ D[1] ^ D[0] ^ C[15] ^ C[24] ^ C[25] ^ C[30];    NewCRC[24] = D[7] ^ D[2] ^ D[1] ^ C[16] ^ C[25] ^ C[26] ^ C[31];    NewCRC[25] = D[3] ^ D[2] ^ C[17] ^ C[26] ^ C[27];    NewCRC[26] = D[6] ^ D[4] ^ D[3] ^ D[0] ^ C[18] ^ C[24] ^ C[27] ^                  C[28] ^ C[30];    NewCRC[27] = D[7] ^ D[5] ^ D[4] ^ D[1] ^ C[19] ^ C[25] ^ C[28] ^                  C[29] ^ C[31];    NewCRC[28] = D[6] ^ D[5] ^ D[2] ^ C[20] ^ C[26] ^ C[29] ^ C[30];    NewCRC[29] = D[7] ^ D[6] ^ D[3] ^ C[21] ^ C[27] ^ C[30] ^ C[31];    NewCRC[30] = D[7] ^ D[4] ^ C[22] ^ C[28] ^ C[31];    NewCRC[31] = D[5] ^ C[23] ^ C[29];    nextCRC32_D8 = NewCRC;  end  endfunctionendmodule