Strip denormals

include/MixerWorkerThread.h

@@ -31,6 +31,12 @@
 #include "ThreadableJob.h"
 #include "Mixer.h"
 
+#ifdef __SSE__
+#include <xmmintrin.h>
+#endif
+#ifdef __SSE3__
+#include <pmmintrin.h>
+#endif
 
 class MixerWorkerThread : public QThread
 {

src/core/MixerWorkerThread.cpp

@@ -101,6 +101,16 @@ MixerWorkerThread::MixerWorkerThread( Mixer* mixer ) :
 	m_workingBuf( new sampleFrame[mixer->framesPerPeriod()] ),
 	m_quit( false )
 {
+	// set denormal protection for this thread
+	#ifdef __SSE3__
+	/* DAZ flag */
+	_MM_SET_DENORMALS_ZERO_MODE( _MM_DENORMALS_ZERO_ON );
+	#endif
+	#ifdef __SSE__
+	/* FTZ flag */
+	_MM_SET_FLUSH_ZERO_MODE( _MM_FLUSH_ZERO_ON );
+	#endif
+
 	// initialize global static data
 	if( queueReadyWaitCond == NULL )
 	{