private final void set(long y)
private void set(long y)
  private final void set(long y)  {    int i = (int) y;    if ((long) i == y)      {	ival = i;	words = null;      }    else      {	realloc(2);	words[0] = i;	words[1] = (int) (y >> 32);	ival = 2;      }  }