func: uint8_t ff_mlp_calculate_parity(const uint8_t *buf, unsigned int buf_size)
  
  {
  
      uint32_t scratch = 0;
  
      const uint8_t *buf_end = buf + buf_size;
  
  
  
  
  
      for (; buf < buf_end - 3; buf += 4)
  
          scratch ^= *((const uint32_t*)buf);
  
  
  
      scratch = xor_32_to_8(scratch);
  
  
  
      for (; buf < buf_end; buf++)
  
  
  
  
      return scratch;
  
  }