Developer Guide and Reference


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


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


No arguments.
This macro returns the current value of the denormals are zero mode bit of the control register.

Product and Performance Information


Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instructi