verilog写一个并行RS(255,239)的代码，要求输入数据64bit位宽，输出也是64bit位宽，源数据部分和编码部分分别作出标记

以下是一个并行RS(255,239)的Verilog代码，包括数据源和编码模块：

module rs_encode (
  input [63:0] data_in,
  output [63:0] data_out
);

  reg [255:0] poly = 256'h11d; // RS(255,239)多项式
  reg [15:0] alpha_to [255:0];
  reg [15:0] index_of [256:0];
  reg [239:0] data [0:63];
  reg [15:0] bb [0:15];
  reg [239:0] recd [0:63];
  reg [15:0] errpos;
  reg [239:0] recd_temp;
  reg [15:0] elp [0:255];
  reg [15:0] d [0:255];
  reg [15:0] l [0:255];
  reg [15:0] u_lu [0:255];
  reg [15:0] s [0:255];
  reg [15:0] root [0:31];
  reg [15:0] loc [0:31];
  reg [15:0] z [0:31];
  reg [7:0] mask [0:7] = {8'hff, 8'hfe, 8'hfc, 8'hf8, 8'hf0, 8'he0, 8'hc0, 8'x80};

  // 生成GF(2^8)的指数表和反指数表
  initial begin
    alpha_to[0] = 16'h0001;
    for (int i = 1; i < 256; i = i + 1) begin
      alpha_to[i] = alpha_to[i - 1] << 1;
      if (alpha_to[i] > 255) begin
        alpha_to[i] = alpha_to[i] ^ poly;
      end
    end

    for (int i = 0; i < 255; i = i + 1) begin
      index_of[alpha_to[i]] = i;
    end
  end

  // 数据源模块
  always @(*) begin
    data[0] = data_in[7:0];
    data[1] = data_in[15:8];
    data[2] = data_in[23:16];
    data[3] = data_in[31:24];
    data[4] = data_in[39:32];
    data[5] = data_in[47:40];
    data[6] = data_in[55:48];
    data[7] = data_in[63:56];
  end

  // 编码模块
  always @(*) begin
    bb[0] = data[0];
    bb[1] = data[1];
    bb[2] = data[2];
    bb[3] = data[3];
    bb[4] = data[4];
    bb[5] = data[5];
    bb[6] = data[6];
    bb[7] = data[7];
    for (int i = 8; i < 16; i = i + 1) begin
      bb[i] = 0;
    end

    for (int i = 0; i < 255; i = i + 1) begin
      recd[i] = data[i % 8];
      for (int j = 7; j > 0; j = j - 1) begin
        if (recd[i] >= 128) begin
          recd[i] = (recd[i] << 1) ^ poly;
        end else begin
          recd[i] = recd[i] << 1;
        end
        recd[i] = recd[i] ^ data[(i + j) % 8];
      end
    end

    for (int i = 0; i < 16; i = i + 1) begin
      d[i] = recd[i];
      for (int j = 1; j < 16; j = j + 1) begin
        d[i] = d[i] ^ (alpha_to[(j * i) % 255] & recd[j + 15]);
      end
    end

    for (int i = 0; i < 16; i = i + 1) begin
      elp[i] = 0;
      s[i] = 0;
    end
    elp[0] = 1;

    for (int i = 0; i < 239; i = i + 1) begin
      recd_temp[i] = 0;
    end

    for (int i = 0; i < 15; i = i + 1) begin
      u_lu[i] = elp[i];
      for (int j = 1; j < i; j = j + 1) begin
        if ((elp[j] != 0) && (bb[i - j] != 255)) begin
          u_lu[i] = u_lu[i] ^ (alpha_to[((index_of[elp[j]] + bb[i - j]) % 255)] & 255);
        end
      end
      u_lu[i] = index_of[u_lu[i]];
      if (i < 14) begin
        s[i + 1] = u_lu[i];
      end
      for (int j = 0; j <= i; j = j + 1) begin
        if ((bb[i + 1 - j] != 255) && (elp[j] != 0)) begin
          elp[i + 1] = elp[i + 1] ^ (alpha_to[(index_of[elp[j]] + bb[i + 1 - j]) % 255]);
        end
      end
      elp[i + 1] = index_of[elp[i + 1]];
    end

    errpos = 0;
    for (int i = 0; i < 16; i = i + 1) begin
      l[i] = elp[i + 239 - 15];
    end

    for (int i = 0; i < 31; i = i + 1) begin
      if (l[0] == 0) begin
        errpos = 255;
      end else begin
        errpos = index_of[l[0]];
      end
      if (errpos > 255) begin
        errpos = 255;
      end

      if (errpos != 255) begin
        z[i] = alpha_to[(255 - errpos)];
      end else begin
        z[i] = 0;
      end

      if (i != 30) begin
        for (int j = 14; j >= 0; j = j - 1) begin
          if (j != 0) begin
            l[j] = l[j - 1] ^ (z[i] & elp[239 - i - j]);
          end else begin
            l[0] = z[i] & elp[239 - i - j];
          end
        end
      end
    end

    for (int i = 0; i < 239; i = i + 1) begin
      recd_temp[i] = recd[i];
    end

    for (int i = 0; i < 31; i = i + 1) begin
      loc[i] = 0;
      for (int j = 0; j < 239; j = j + 1) begin
        if (recd_temp[j] != 255) begin
          loc[i] = loc[i] ^ (alpha_to[(index_of[recd_temp[j]] + (i * j)) % 255]);
        end
      end
      loc[i] = index_of[loc[i]];
    end

    for (int i = 0; i < 31; i = i + 1) begin
      if (errpos != 255) begin
        if (loc[i] != 255) begin
          recd[errpos] = recd[errpos] ^ alpha_to[(loc[i] + index_of[z[i]]) % 255];
        end
      end
    end

    data_out[7:0] = recd[0];
    data_out[15:8] = recd[1];
    data_out[23:16] = recd[2];
    data_out[31:24] = recd[3];
    data_out[39:32] = recd[4];
    data_out[47:40] = recd[5];
    data_out[55:48] = recd[6];
    data_out[63:56] = recd[7];
  end
endmodule

其中，数据源模块将输入的64位数据拆分为8个8位数据，并存储到data数组中；编码模块根据RS(255,239)多项式进行编码，最终将编码后的数据存储到data_out中返回。