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A compiler intrinsic is usually faster than a nonintrinsic function because code is placed in line and does not generate a function call.
None of the functions in this section require you to use the /Oi compiler option.
The Visual C++ compiler includes the following intrinsics:
In addition, the Visual C++ compiler supports intrinsics for MMX, Streaming SIMD Extensions (SSE), and Streaming SIMD Extensions 2: