set denormal mode only when supported

main.cpp

@@ -25,10 +25,12 @@ int main(int argc, char* argv[])
 	//*********************************  Main BioEM code **********************************
 	//*************************************************************************************
 
+#ifdef _MM_SET_DENORMALS_ZERO_MODE
 #pragma omp parallel
 	{
-//_MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_ON); //Flush denormals to zero in all OpenMP threads
+		_MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_ON); //Flush denormals to zero in all OpenMP threads
 	}
+#endif
 	HighResTimer timer;
 
 	bioem* bio;