I have seen that Intel seems to have included a new assembly function to get real random numbers obtained from hardware. The name of the instruction is RdRand, but only a small amount of details seem accessible on it on Internet: http://en.wikipedia.org/wiki/RdRand

My questions concerning this new instruction and its use in C++11 are the following:

  1. Are the random numbers generated with RdRand really random? (each bit generated from uncorrelated white noise or quantum processes? )

  2. Is it a special feature of Ivy Bridge processors and will Intel continue to implement this function in the next generation of cpu?

  3. How to use it through C++11? Maybe with std::random_device but do compilers already call RdRand if the instruction is available?

  4. How to check whether RdRand is really called when I compile a program?

c++ assembly c++11 random rdrand
Edit
Report