The macro function intrinsics listed below are designed for the Intel processors code-named "Prescott".
_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.