are modified, we must also specify them as outputs, or gcc
will assume they contain their original values. */
: "=&r" (sum), "=r" (iph), "=r" (ihl), "=&r" (tmpreg0), "=&r" (tmpreg1)
are modified, we must also specify them as outputs, or gcc
will assume they contain their original values. */
: "=&r" (sum), "=r" (iph), "=r" (ihl), "=&r" (tmpreg0), "=&r" (tmpreg1)