Function prefetch_l2

include/rabitqlib/utils/memory.hpp:95–101

    __builtin_prefetch(addr, 0, 3);
#endif
}

static inline void prefetch_l2(const void* addr) {
#if defined(__SSE2__)
    _mm_prefetch((const char*)addr, _MM_HINT_T1);
#else
    __builtin_prefetch(addr, 0, 2);
#endif
}