# Macro Functions

The macro function intrinsics listed here were designed for the Intel® Pentium® 4 processor with Streaming SIMD Extensions 3 (Intel® SSE3). They are also compatible with Streaming SIMD Extensions 2 (Intel® SSE2).

The prototypes for these intrinsics are in the emmintrin.h header file.

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

    #include <immintrin.h>

## _MM_SET_DENORMALS_ZERO_MODE

_MM_SET_DENORMALS_ZERO_MODE(x);

Macro arguments: either _MM_DENORMALS_ZERO_ON, _MM_DENORMALS_ZERO_OFF.

This macro causes "denormals are zero" mode to be turned ON or OFF by setting the appropriate bit of the control register.

## _MM_GET_DENORMALS_ZERO_MODE

_MM_GET_DENORMALS_ZERO_MODE();

No arguments.

This macro returns the current value of the denormals are zero mode bit of the control register.

Parent topic: Intrinsics for Intel® Streaming SIMD Extensions 2 (Intel® SSE2)