__asm__("adds %1, %2, %3; sbcccs %1, %1, %0; movcc %0, #0" \
: "=&r" (flag), "=&r" (sum) \
: "r" (addr), "Ir" (size), "0" (current_thread_info()->addr_limit) \
__asm__("adds %1, %2, %3; sbcccs %1, %1, %0; movcc %0, #0" \
: "=&r" (flag), "=&r" (sum) \
: "r" (addr), "Ir" (size), "0" (current_thread_info()->addr_limit) \