diff --git a/FDTD/engine_sse.cpp b/FDTD/engine_sse.cpp
new file mode 100644
index 0000000..e434b68
--- /dev/null
+++ b/FDTD/engine_sse.cpp
@@ -0,0 +1,145 @@
+/*
+*	Copyright (C) 2010 Thorsten Liebig (Thorsten.Liebig@gmx.de)
+*
+*	This program is free software: you can redistribute it and/or modify
+*	it under the terms of the GNU General Public License as published by
+*	the Free Software Foundation, either version 3 of the License, or
+*	(at your option) any later version.
+*
+*	This program is distributed in the hope that it will be useful,
+*	but WITHOUT ANY WARRANTY; without even the implied warranty of
+*	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*	GNU General Public License for more details.
+*
+*	You should have received a copy of the GNU General Public License
+*	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "engine_sse.h"
+#include "tools/array_ops.h"
+
+//! \brief construct an Engine_sse instance
+//! it's the responsibility of the caller to free the returned pointer
+Engine_sse* Engine_sse::New(const Operator* op)
+{
+	Engine_sse* e = new Engine_sse(op);
+	e->Init();
+	return e;
+}
+
+Engine_sse::Engine_sse(const Operator* op) : Engine(op)
+{
+	Op = op;
+	for (int n=0;n<3;++n)
+	{
+		numLines[n] = Op->GetNumberOfLines(n);
+	}
+}
+
+Engine_sse::~Engine_sse()
+{
+	this->Reset();
+}
+
+void Engine_sse::Init()
+{
+	numTS = 0;
+	volt_ = Create_N_3DArray_v4sf(numLines);
+	curr = Create_N_3DArray(numLines);
+}
+
+void Engine_sse::Reset()
+{
+	Delete_N_3DArray_v4sf(volt_,numLines);
+	volt=NULL;
+	Delete_N_3DArray(curr,numLines);
+	curr=NULL;
+}
+
+void Engine_sse::UpdateVoltages()
+{
+	unsigned int pos[4];
+	bool shift[3];
+
+	//voltage updates
+	for (pos[0]=0;pos[0]<numLines[0];++pos[0])
+	{
+		shift[0]=pos[0];
+		for (pos[1]=0;pos[1]<numLines[1];++pos[1])
+		{
+			shift[1]=pos[1];
+			for (pos[2]=0;pos[2]<numLines[2]/4;++pos[2])
+			{
+				//do the updates here
+				//for x
+				volt_[0][pos[0]][pos[1]][pos[2]].v *= Op->vv_[0][pos[0]][pos[1]][pos[2]].v;
+				volt_[1][pos[0]][pos[1]][pos[2]].v *= Op->vv_[1][pos[0]][pos[1]][pos[2]].v;
+				volt_[2][pos[0]][pos[1]][pos[2]].v *= Op->vv_[2][pos[0]][pos[1]][pos[2]].v;
+
+
+				for (pos[3]=0;pos[3]<4;++pos[3]) {
+					shift[2]=pos[2]+pos[3];
+					volt_[0][pos[0]][pos[1]][pos[2]].f[pos[3]] += Op->vi_[0][pos[0]][pos[1]][pos[2]].f[pos[3]] * ( curr[2][pos[0]][pos[1]][pos[2]] - curr[2][pos[0]][pos[1]-shift[1]][pos[2]] - curr[1][pos[0]][pos[1]][pos[2]] + curr[1][pos[0]][pos[1]][pos[2]-shift[2]]);
+					volt_[1][pos[0]][pos[1]][pos[2]].f[pos[3]] += Op->vi_[1][pos[0]][pos[1]][pos[2]].f[pos[3]] * ( curr[0][pos[0]][pos[1]][pos[2]] - curr[0][pos[0]][pos[1]][pos[2]-shift[2]] - curr[2][pos[0]][pos[1]][pos[2]] + curr[2][pos[0]-shift[0]][pos[1]][pos[2]]);
+					volt_[2][pos[0]][pos[1]][pos[2]].f[pos[3]] += Op->vi_[2][pos[0]][pos[1]][pos[2]].f[pos[3]] * ( curr[1][pos[0]][pos[1]][pos[2]] - curr[1][pos[0]-shift[0]][pos[1]][pos[2]] - curr[0][pos[0]][pos[1]][pos[2]] + curr[0][pos[0]][pos[1]-shift[1]][pos[2]]);
+				}
+			}
+		}
+	}
+}
+
+void Engine_sse::ApplyVoltageExcite()
+{
+	int exc_pos;
+	//soft voltage excitation here (E-field excite)
+	for (unsigned int n=0;n<Op->E_Exc_Count;++n)
+	{
+		exc_pos = (int)numTS - (int)Op->E_Exc_delay[n];
+		exc_pos *= (exc_pos>0 && exc_pos<=(int)Op->ExciteLength);
+//			if (n==0) cerr << numTS << " => " << Op->ExciteSignal[exc_pos] << endl;
+		volt[Op->E_Exc_dir[n]][Op->E_Exc_index[0][n]][Op->E_Exc_index[1][n]][Op->E_Exc_index[2][n]] += Op->E_Exc_amp[n]*Op->ExciteSignal[exc_pos];
+	}
+}
+
+void Engine_sse::UpdateCurrents()
+{
+	unsigned int pos[3];
+	for (pos[0]=0;pos[0]<numLines[0]-1;++pos[0])
+	{
+		for (pos[1]=0;pos[1]<numLines[1]-1;++pos[1])
+		{
+			for (pos[2]=0;pos[2]<numLines[2]-1;++pos[2])
+			{
+				//do the updates here
+				//for x
+				curr[0][pos[0]][pos[1]][pos[2]] *= Op->ii[0][pos[0]][pos[1]][pos[2]];
+				curr[0][pos[0]][pos[1]][pos[2]] += Op->iv[0][pos[0]][pos[1]][pos[2]] * ( volt[2][pos[0]][pos[1]][pos[2]] - volt[2][pos[0]][pos[1]+1][pos[2]] - volt[1][pos[0]][pos[1]][pos[2]] + volt[1][pos[0]][pos[1]][pos[2]+1]);
+
+				//for y
+				curr[1][pos[0]][pos[1]][pos[2]] *= Op->ii[1][pos[0]][pos[1]][pos[2]];
+				curr[1][pos[0]][pos[1]][pos[2]] += Op->iv[1][pos[0]][pos[1]][pos[2]] * ( volt[0][pos[0]][pos[1]][pos[2]] - volt[0][pos[0]][pos[1]][pos[2]+1] - volt[2][pos[0]][pos[1]][pos[2]] + volt[2][pos[0]+1][pos[1]][pos[2]]);
+
+				//for z
+				curr[2][pos[0]][pos[1]][pos[2]] *= Op->ii[2][pos[0]][pos[1]][pos[2]];
+				curr[2][pos[0]][pos[1]][pos[2]] += Op->iv[2][pos[0]][pos[1]][pos[2]] * ( volt[1][pos[0]][pos[1]][pos[2]] - volt[1][pos[0]+1][pos[1]][pos[2]] - volt[0][pos[0]][pos[1]][pos[2]] + volt[0][pos[0]][pos[1]+1][pos[2]]);
+			}
+		}
+	}
+}
+
+void Engine_sse::ApplyCurrentExcite()
+{
+}
+
+bool Engine_sse::IterateTS(unsigned int iterTS)
+{
+	for (unsigned int iter=0;iter<iterTS;++iter)
+	{
+		UpdateVoltages();
+		ApplyVoltageExcite();
+		UpdateCurrents();
+		ApplyCurrentExcite();
+		++numTS;
+	}
+	return true;
+}
diff --git a/FDTD/engine_sse.h b/FDTD/engine_sse.h
new file mode 100644
index 0000000..a1f1bc5
--- /dev/null
+++ b/FDTD/engine_sse.h
@@ -0,0 +1,57 @@
+/*
+*	Copyright (C) 2010 Thorsten Liebig (Thorsten.Liebig@gmx.de)
+*
+*	This program is free software: you can redistribute it and/or modify
+*	it under the terms of the GNU General Public License as published by
+*	the Free Software Foundation, either version 3 of the License, or
+*	(at your option) any later version.
+*
+*	This program is distributed in the hope that it will be useful,
+*	but WITHOUT ANY WARRANTY; without even the implied warranty of
+*	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*	GNU General Public License for more details.
+*
+*	You should have received a copy of the GNU General Public License
+*	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef ENGINE_SSE_H
+#define ENGINE_SSE_H
+
+#include "operator.h"
+#include "engine.h"
+
+class Engine_sse : public Engine
+{
+public:
+	static Engine_sse* New(const Operator* op);
+	virtual ~Engine_sse();
+
+	virtual void Init();
+	virtual void Reset();
+
+	//!Iterate a number of timesteps
+	virtual bool IterateTS(unsigned int iterTS);
+
+	virtual unsigned int GetNumberOfTimesteps() {return numTS;};
+
+//	virtual f4vector**** GetVoltages() {return volt;};
+	virtual FDTD_FLOAT**** GetCurrents() {return curr;};
+
+protected:
+	Engine_sse(const Operator* op);
+	const Operator* Op;
+
+	virtual void UpdateVoltages();
+	virtual void ApplyVoltageExcite();
+	virtual void UpdateCurrents();
+	virtual void ApplyCurrentExcite();
+
+	unsigned int numLines[3];
+
+	f4vector**** volt_;
+	FDTD_FLOAT**** curr;
+	unsigned int numTS;
+};
+
+#endif // ENGINE_SSE_H
diff --git a/FDTD/operator.cpp b/FDTD/operator.cpp
index 8314cb6..429e863 100644
--- a/FDTD/operator.cpp
+++ b/FDTD/operator.cpp
@@ -47,6 +47,8 @@ void Operator::Init()
 	E_Exc_dir=NULL;
 	vv=NULL;
 	vi=NULL;
+	vv_=NULL;
+	vi_=NULL;
 	iv=NULL;
 	ii=NULL;
 	for (int n=0;n<3;++n)
@@ -75,6 +77,8 @@ void Operator::Reset()
 	delete[] E_Exc_amp;
 	Delete_N_3DArray(vv,numLines);
 	Delete_N_3DArray(vi,numLines);
+	Delete_N_3DArray_v4sf(vv_,numLines);
+	Delete_N_3DArray_v4sf(vi_,numLines);
 	Delete_N_3DArray(iv,numLines);
 	Delete_N_3DArray(ii,numLines);
 	for (int n=0;n<3;++n)
@@ -502,10 +506,14 @@ void Operator::InitOperator()
 {
 	Delete_N_3DArray(vv,numLines);
 	Delete_N_3DArray(vi,numLines);
+	Delete_N_3DArray_v4sf(vv_,numLines);
+	Delete_N_3DArray_v4sf(vi_,numLines);
 	Delete_N_3DArray(iv,numLines);
 	Delete_N_3DArray(ii,numLines);
 	vv = Create_N_3DArray(numLines);
 	vi = Create_N_3DArray(numLines);
+	vv_ = Create_N_3DArray_v4sf(numLines);
+	vi_ = Create_N_3DArray_v4sf(numLines);
 	iv = Create_N_3DArray(numLines);
 	ii = Create_N_3DArray(numLines);
 }
@@ -516,6 +524,9 @@ inline void Operator::Calc_ECOperatorPos(int n, unsigned int* pos)
 	vv[n][pos[0]][pos[1]][pos[2]] = (1-dT*EC_G[n][i]/2/EC_C[n][i])/(1+dT*EC_G[n][i]/2/EC_C[n][i]);
 	vi[n][pos[0]][pos[1]][pos[2]] = (dT/EC_C[n][i])/(1+dT*EC_G[n][i]/2/EC_C[n][i]);
 
+	vv_[n][pos[0]][pos[1]][pos[2]/4].f[pos[2]%4] = vv[n][pos[0]][pos[1]][pos[2]];
+	vi_[n][pos[0]][pos[1]][pos[2]/4].f[pos[2]%4] = vi[n][pos[0]][pos[1]][pos[2]];
+
 	ii[n][pos[0]][pos[1]][pos[2]] = (1-dT*EC_R[n][i]/2/EC_L[n][i])/(1+dT*EC_R[n][i]/2/EC_L[n][i]);
 	iv[n][pos[0]][pos[1]][pos[2]] = (dT/EC_L[n][i])/(1+dT*EC_R[n][i]/2/EC_L[n][i]);
 }
diff --git a/FDTD/operator.h b/FDTD/operator.h
index ee1a9b4..899b91f 100644
--- a/FDTD/operator.h
+++ b/FDTD/operator.h
@@ -24,6 +24,21 @@
 
 #define FDTD_FLOAT float
 
+
+#if __SIZEOF_FLOAT__ != 4
+	#error wrong size of float
+#endif
+
+typedef float v4sf __attribute__ ((vector_size (16))); // vector of four single floats
+
+union f4vector
+{
+  v4sf v;
+  float f[4];
+};
+
+
+
 //! Abstract base-class for the FDTD-operator
 class Operator
 {
@@ -130,6 +145,8 @@ public:
 	FDTD_FLOAT**** vi; //calc new voltage from old current
 	FDTD_FLOAT**** ii; //calc new current from old current
 	FDTD_FLOAT**** iv; //calc new current from old voltage
+	f4vector**** vv_; //calc new voltage from old voltage
+	f4vector**** vi_; //calc new voltage from old current
 
 	//Excitation time-signal
 	unsigned int ExciteLength;
diff --git a/openEMS.pro b/openEMS.pro
index 6ab1fba..8a3e634 100644
--- a/openEMS.pro
+++ b/openEMS.pro
@@ -38,7 +38,8 @@ SOURCES += main.cpp \
     openems.cpp \
     FDTD/engine_multithread.cpp \
     FDTD/operator_cylinder.cpp \
-    FDTD/engine_cylinder.cpp
+	FDTD/engine_cylinder.cpp \
+	FDTD/engine_sse.cpp
 HEADERS += tools/ErrorMsg.h \
     tools/AdrOp.h \
     tools/constants.h \
@@ -54,10 +55,11 @@ HEADERS += tools/ErrorMsg.h \
     openems.h \
     FDTD/engine_multithread.h \
     FDTD/operator_cylinder.h \
-    FDTD/engine_cylinder.h
-QMAKE_CXXFLAGS_RELEASE = -O2 \
+	FDTD/engine_cylinder.h \
+	FDTD/engine_sse.h
+QMAKE_CXXFLAGS_RELEASE = -O3 \
     -g \
-    -march=native
+	-march=native
 QMAKE_CXXFLAGS_DEBUG = -O0 \
     -g \
     -march=native
diff --git a/openems.cpp b/openems.cpp
index a918e6d..ff9f3d9 100644
--- a/openems.cpp
+++ b/openems.cpp
@@ -21,6 +21,7 @@
 #include "FDTD/engine.h"
 #include "FDTD/engine_cylinder.h"
 #include "FDTD/engine_multithread.h"
+#include "FDTD/engine_sse.h"
 #include "FDTD/processvoltage.h"
 #include "FDTD/processcurrent.h"
 #include "FDTD/processfields_td.h"
@@ -112,6 +113,12 @@ bool openEMS::parseCommandLineArgument( const char *argv )
 		cout << "openEMS - fixed number of threads: " << m_engine_numThreads << endl;
 		return true;
 	}
+	else if (strcmp(argv,"--engine=sse")==0)
+	{
+		cout << "openEMS - enabled sse engine" << endl;
+		m_engine = EngineType_SSE;
+		return true;
+	}
 
 	return false;
 }
diff --git a/openems.h b/openems.h
index 475a5cd..2ccd7f3 100644
--- a/openems.h
+++ b/openems.h
@@ -61,7 +61,7 @@ protected:
 	Engine* FDTD_Eng;
 	ProcessingArray* PA;
 
-	enum EngineType {EngineType_Standard,EngineType_Multithreaded};
+	enum EngineType {EngineType_Standard,EngineType_Multithreaded,EngineType_SSE};
 	EngineType m_engine;
 	unsigned int m_engine_numThreads;
 };
diff --git a/tools/array_ops.cpp b/tools/array_ops.cpp
index 0393466..a5e1860 100644
--- a/tools/array_ops.cpp
+++ b/tools/array_ops.cpp
@@ -91,3 +91,70 @@ void Dump_N_3DArray2File(ostream &file, FDTD_FLOAT**** array, unsigned int* numL
 		}
 	}
 }
+
+
+
+
+void Delete3DArray_v4sf(f4vector*** array, const unsigned int* numLines)
+{
+	if (array==NULL) return;
+	unsigned int pos[3];
+	for (pos[0]=0;pos[0]<numLines[0];++pos[0])
+	{
+		for (pos[1]=0;pos[1]<numLines[1];++pos[1])
+		{
+			delete[] array[pos[0]][pos[1]];
+		}
+		delete[] array[pos[0]];
+	}
+	delete[] array;
+}
+
+void Delete_N_3DArray_v4sf(f4vector**** array, const unsigned int* numLines)
+{
+	if (array==NULL) return;
+	for (int n=0;n<3;++n)
+	{
+		Delete3DArray_v4sf(array[n],numLines);
+	}
+	delete[] array;
+}
+
+f4vector*** Create3DArray_v4sf(const unsigned int* numLines)
+{
+	f4vector*** array=NULL;
+	unsigned int pos[3];
+	array = new f4vector**[numLines[0]];
+	for (pos[0]=0;pos[0]<numLines[0];++pos[0])
+	{
+		array[pos[0]] = new f4vector*[numLines[1]];
+		for (pos[1]=0;pos[1]<numLines[1];++pos[1])
+		{
+			array[pos[0]][pos[1]] = new f4vector[numLines[2]/4];
+			for (pos[2]=0;pos[2]<numLines[2]/4;++pos[2])
+			{
+				array[pos[0]][pos[1]][pos[2]].f[0] = 0;
+				array[pos[0]][pos[1]][pos[2]].f[1] = 0;
+				array[pos[0]][pos[1]][pos[2]].f[2] = 0;
+				array[pos[0]][pos[1]][pos[2]].f[3] = 0;
+			}
+		}
+	}
+	return array;
+}
+f4vector**** Create_N_3DArray_v4sf(const unsigned int* numLines)
+{
+	if ((numLines[2] % 4) != 0) {
+		cerr << "sse engine needs number of mesh lines divideable by 4" << endl;
+		exit(1);
+	}
+
+	f4vector**** array=NULL;
+	array = new f4vector***[3];
+	for (int n=0;n<3;++n)
+	{
+		array[n]=Create3DArray_v4sf(numLines);
+	}
+	return array;
+}
+
diff --git a/tools/array_ops.h b/tools/array_ops.h
index 5424e05..24cfec2 100644
--- a/tools/array_ops.h
+++ b/tools/array_ops.h
@@ -28,4 +28,11 @@ void Delete_N_3DArray(FDTD_FLOAT**** array, const unsigned int* numLines);
 
 void Dump_N_3DArray2File(ostream &file, FDTD_FLOAT**** array, const unsigned int* numLines);
 
+
+void Delete3DArray_v4sf(f4vector*** array, const unsigned int* numLines);
+void Delete_N_3DArray_v4sf(f4vector**** array, const unsigned int* numLines);
+f4vector*** Create3DArray_v4sf(const unsigned int* numLines);
+f4vector**** Create_N_3DArray_v4sf(const unsigned int* numLines);
+
+
 #endif // ARRAY_OPS_H