In Intel® processors, the flush-to-zero (

FTZ

) and

denormals

-are-zero (

DAZ

) flags in the

MXCSR

register are used to control floating-point calculations. Intel® Streaming SIMD Extensions (Intel® SSE) and Intel® Advanced Vector Extensions (Intel® AVX) instructions, including scalar and vector instructions, benefit from enabling the

FTZ

and

DAZ

flags. Floating-point computations using the Intel® SSE and Intel® AVX instructions are accelerated when the

FTZ

and

DAZ

flags are enabled. This improves the application's performance.

Manually set the

FTZ

flags with the following macros:

Manually set the

DAZ

flags with the following macros:

The prototypes for these macros are in

xmmintrin.h

(

FTZ

) and

pmmintrin.h

(

DAZ

).