Intrinsics that Generate Random Numbers of 16/32/64 Bit Wide Random Integers

There are three intrinsics returning a hardware-generated random value. These intrinsics are declared in the immintrin.h header file.

These intrinsics are mapped to a single RDRAND instruction. The exception is the intrinsic _rdrand64_step(), which is mapped to two 32-bit RDRAND instructions and several shift and conditional jump/move instructions on 32-bit platforms.

• _rdrand16_step(), _rdrand32_step(), _rdrand64_step()
  Generate random numbers of 16/32/64 bit wide random integers.