__builtin_addex
Purpose
Adds Extended using Overflow Bit.
This built-in function is valid only when -qarch(-mcpu) is set to utilize the POWER9™ technology.
Prototype
signed long long __builtin_addex(signed long long, signed long long, const int);
unsigned long long __builtin_addex(unsigned long long, unsigned long long, const int);
Usage
The third parameter is 0. The parameter equal to 1, 2, or 3 is reserved.
The result is the sum of the first parameter, the second parameter, and the Overflow Bit.
