bigadd           1487 bignum.c       	return bignorm(bigadd(x, y, 1));
bigadd           1512 bignum.c       	return bignorm(bigadd(x, y, 0));
bigadd           1785 bignum.c       	if (divp) *divp = bigadd(*divp, rb_int2big(1), 0);
bigadd           1786 bignum.c       	if (modp) *modp = bigadd(mod, y, 1);