macos - Enabling floating point interrupts on Mac OS X Intel

Question

On Linux, feenableexcept and fedisableexcept can be used to control the generation of SIGFPE interrupts on floating point exceptions. How can I do this on Mac OS X Intel?

Inline assembly for enabling floating point interrupts is provided in http://developer.apple.com/documentation/Performance/Conceptual/Mac_OSX_Numerics/Mac_OSX_Numerics.pdf, pp. 7-15, but only for PowerPC assembly.

Answer 1

Exceptions for sse can be enabled using _MM_SET_EXCEPTION_MASK from xmmintrin.h. For example, to enable invalid (nan) exceptions, do

#include <xmmintrin.h>
...
_MM_SET_EXCEPTION_MASK(_MM_GET_EXCEPTION_MASK() & ~_MM_MASK_INVALID);