du_int
du_int low;
du_int low;
du_int low;
du_int high;
du_int high;
du_int low;
__mulddi3(du_int a, du_int b)
const du_int lower_mask = (du_int)~0 >> bits_in_dword_2;
du_int t = r.s.low >> bits_in_dword_2;