nn_divrem_normalized
ATTRIBUTE_WARN_UNUSED_RET int nn_divrem_normalized(nn_t q, nn_t r, nn_src_t a, nn_src_t b, word_t v);
ret = nn_divrem_normalized(&q, r, a, b, v);
ret = nn_divrem_normalized(q, r, &a_shift, b_norm, v); EG(ret, err);
ATTRIBUTE_WARN_UNUSED_RET int nn_divrem_normalized(nn_t q, nn_t r, nn_src_t a, nn_src_t b, word_t v);