mpihelp_addmul_1
mpi_limb_t mpihelp_addmul_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
cy_limb = mpihelp_addmul_1(prodp + esize, up, esize, vp[esize]);
cy_limb = mpihelp_addmul_1(prodp + esize, vp, size, up[esize]);
cy_limb = mpihelp_addmul_1(prodp, up, size, v_limb);
cy_limb = mpihelp_addmul_1(prodp + esize, up, esize, up[esize]);
cy_limb = mpihelp_addmul_1(prodp + esize, up, size, up[esize]);
cy = mpihelp_addmul_1(prodp, up, usize, v_limb);
cy = mpihelp_addmul_1(prodp, up, size, v_limb);