1 #define vector64 __attribute__((vector_size(8))) 2 main()3 main(){ 4 5 vector64 int c; 6 vector64 int a = {1, -1}; 7 vector64 int b = {2, -2}; 8 c = -a + b*b*(-1LL); 9 /* c is now {5, 3} */ 10 11 printf("result is %llx\n", (long long)c); 12 } 13