void OPPROTO op_check_subfo_64 (void)

{

    if (likely(!(((uint64_t)(~T2) ^ (uint64_t)T1 ^ UINT64_MAX) &

                 ((uint64_t)(~T2) ^ (uint64_t)T0) & (1ULL << 63)))) {

        xer_ov = 0;

    } else {

        xer_ov = 1;

        xer_so = 1;

    }

    RETURN();

}
