_reverse_endianness
ret = _reverse_endianness(hash, hlen); EG(ret, err);
ret = _reverse_endianness(hash, hlen); EG(ret, err);
ret = _reverse_endianness(&y_self_signed[0], sizeof(y_self_signed)); EG(ret, err);
ret = _reverse_endianness(&FE2OS_D[0], q_len); EG(ret, err);
ret = _reverse_endianness(&r_bar[0], r_bar_len); EG(ret, err);
ret = _reverse_endianness(&FE2OS_W[0], p_len); EG(ret, err);
ret = _reverse_endianness(&FE2OS_W[p_len], p_len); EG(ret, err);
ret = _reverse_endianness(hash, hsize); EG(ret, err);
ret = _reverse_endianness(FE2OS_W, l); EG(ret, err);
ret = _reverse_endianness(&sig[l], (u16)BIGN_S1_LEN(q_bit_len));
ret = _reverse_endianness(&TMP[0], l); EG(ret, err);
ret = _reverse_endianness(&TMP[0], (u16)BIGN_S1_LEN(q_bit_len)); EG(ret, err);
ret = _reverse_endianness(hash, hsize); EG(ret, err);
ret = _reverse_endianness(hash, hsize); EG(ret, err);
ret = _reverse_endianness(&FE2OS_W[0], p_len); EG(ret, err);
ret = _reverse_endianness(&FE2OS_W[p_len], p_len); EG(ret, err);
ret = _reverse_endianness(h_buf, hsize); EG(ret, err);
ret = _reverse_endianness(h_buf, hsize); EG(ret, err);
ret = _reverse_endianness(h_buf, hsize); EG(ret, err);
ret = _reverse_endianness(h_buf, hsize); EG(ret, err);