int fp_unsigned_bin_size(fp_int *a)
{
  int     size = fp_count_bits (a);
  return (size / 8 + ((size & 7) != 0 ? 1 : 0));
}
int fp_unsigned_bin_size(fp_int *a)
{
  int     size = fp_count_bits (a);
  return (size / 8 + ((size & 7) != 0 ? 1 : 0));
}