s_mpv_div_2dx1d
mp_err MPI_ASM_DECL s_mpv_div_2dx1d(mp_digit Nhi, mp_digit Nlo,
MP_CHECKOK( s_mpv_div_2dx1d(p, w, d, &q, &w) );
MP_CHECKOK( s_mpv_div_2dx1d(q_msd, MP_DIGIT(&part, MP_USED(&part) - 2),