rb_big_mul0      1610 bignum.c           return bignorm(rb_big_mul0(x, y));
rb_big_mul0      2040 bignum.c       	return bigtrunc(rb_big_mul0(x, x));
rb_big_mul0      2057 bignum.c           a2 = bigtrunc(rb_big_mul0(a, b));
rb_big_mul0      2128 bignum.c       		    z = z ? bigtrunc(rb_big_mul0(z, x)) : x;