code: function mpn_cmp(n1, n2, l) {
  	while (l > 0) {
  		var c = n1[--l] - n2[l];
  		if (c != 0) {
  			return c;
  		}
  	}
  	return 0;
  }
docs: /*
  Compares two unsigned multi-precision integers. Returns a negative value if
  n1 < n2, a positive value if n1 > n2, or zero if n1 == n2.