The macro function intrinsics listed here are designed for the IntelŪ PentiumŪ 4 processor with Streaming SIMD Extensions 3 (SSE3).
The prototypes for these intrinsics are in the pmmintrin.h header file.
_MM_SET_DENORMALS_ZERO_MODE(x)
Macro arguments: one of __MM_DENORMALS_ZERO_ON,
_MM_DENORMALS_ZERO_OFF
This 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()
No arguments. This returns the current value of the denormals are zero mode bit of the control register.