From baf7c74ad752b4606219d796e5c1c3d08b0824ed Mon Sep 17 00:00:00 2001
From: Vesa <contact.diizy@nbl.fi>
Date: Fri, 14 Nov 2014 20:43:49 +0200
Subject: [PATCH] Strip denormals

---
 include/MixerWorkerThread.h    |  6 ++++++
 src/core/MixerWorkerThread.cpp | 10 ++++++++++
 2 files changed, 16 insertions(+)

diff --git a/include/MixerWorkerThread.h b/include/MixerWorkerThread.h
index 2b680e8d5..d1ebc73eb 100644
--- a/include/MixerWorkerThread.h
+++ b/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
 {
diff --git a/src/core/MixerWorkerThread.cpp b/src/core/MixerWorkerThread.cpp
index 834db4afe..817d19c71 100644
--- a/src/core/MixerWorkerThread.cpp
+++ b/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 )
 	{