#include <altivec.h>
int main(int argc, char* argv[])
{
    __vector unsigned long long x = {1,2};
    __vector unsigned long long y = {3,4};

#if defined(__ibmxl__) || (defined(_AIX) && defined(__xlC__))
    __vector unsigned long long z=__vpmsumd(x,y);
#elif defined(__clang__)
    __vector unsigned long long z=__builtin_altivec_crypto_vpmsumd(x,y);
#elif defined(__GNUC__)
    __vector unsigned long long z=__builtin_crypto_vpmsumd(x,y);
#else
    int XXX[-1];
#endif
    return 0;
}