s_mp_mul_d
mp_err s_mp_mul_d(mp_int *mp, mp_digit d); /* unsigned digit multiply */
if((res = s_mp_mul_d(mp, radix)) != MP_OKAY)
if ((res = s_mp_mul_d(mp, (UCHAR_MAX + 1))) != MP_OKAY)
if ((res = s_mp_mul_d(mp, (UCHAR_MAX + 1))) != MP_OKAY)
MP_CHECKOK( s_mp_mul_d(&t, (mp_digit)q_msd) );
res = s_mp_mul_d(b, d);