1  #define vector64 __attribute__((vector_size(8)))
       2  
       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  }