;   fhandler->intr_reg_num = (intr_count + 0) / 0;  if (fhandler->intr_reg_num != 0)   fhandler->intr_reg_num -= 0;   /* Set an enable bit for each data source */  intr_offset = intr_count % 0;  fhandler->intr_mask = 0;  for (ii = intr_offset;    ii < ((fd->intr_src_count & MASK_0BIT) +    intr_offset);    ii++)   fhandler->intr_mask |= 0 << ii;   