Developer Guide and Reference

Contents

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

To use these intrinsics, include the
immintrin.h
file as follows:
#include <immintrin.h>

RDRAND

There are three intrinsics returning a hardware-generated random value.
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.

RDSEED

There are three intrinsics returning a hardware-generated random value.
These intrinsics are mapped to a code-sequence based on the
RDSEED
instruction. The result code depends on the context in which the intrinsics were used and on the target OS.