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diff --git a/Eigen/src/Core/PacketMath.h b/Eigen/src/Core/PacketMath.h
new file mode 100644
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+++ b/Eigen/src/Core/PacketMath.h
@@ -0,0 +1,85 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra. Eigen itself is part of the KDE project.
+//
+// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
+//
+// Eigen is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 3 of the License, or (at your option) any later version.
+//
+// Alternatively, 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 2 of
+// the License, or (at your option) any later version.
+//
+// Eigen 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 Lesser General Public License or the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License and a copy of the GNU General Public License along with
+// Eigen. If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef EIGEN_PACKET_MATH_H
+#define EIGEN_PACKET_MATH_H
+
+#ifdef EIGEN_INTEL_PLATFORM
+
+template<> struct ei_packet_traits<float>  { typedef __m128  type; enum {size=4}; };
+template<> struct ei_packet_traits<double> { typedef __m128d type; enum {size=2}; };
+template<> struct ei_packet_traits<int>    { typedef __m128i type; enum {size=4}; };
+
+inline __m128  ei_padd(const __m128&  a, const __m128&  b) { return _mm_add_ps(a,b); }
+inline __m128d ei_padd(const __m128d& a, const __m128d& b) { return _mm_add_pd(a,b); }
+inline __m128i ei_padd(const __m128i& a, const __m128i& b) { return _mm_add_epi32(a,b); }
+
+inline __m128  ei_psub(const __m128&  a, const __m128&  b) { return _mm_sub_ps(a,b); }
+inline __m128d ei_psub(const __m128d& a, const __m128d& b) { return _mm_sub_pd(a,b); }
+inline __m128i ei_psub(const __m128i& a, const __m128i& b) { return _mm_sub_epi32(a,b); }
+
+inline __m128  ei_pmul(const __m128&  a, const __m128&  b) { return _mm_mul_ps(a,b); }
+inline __m128d ei_pmul(const __m128d& a, const __m128d& b) { return _mm_mul_pd(a,b); }
+inline __m128i ei_pmul(const __m128i& a, const __m128i& b) { return _mm_mul_epu32(a,b); }
+
+inline __m128  ei_pmin(const __m128&  a, const __m128&  b) { return _mm_min_ps(a,b); }
+inline __m128d ei_pmin(const __m128d& a, const __m128d& b) { return _mm_min_pd(a,b); }
+inline __m128i ei_pmin(const __m128i& a, const __m128i& b)
+{
+  __m128i mask = _mm_cmplt_epi32(a,b);
+  return _mm_or_si128(_mm_and_si128(mask,a),_mm_andnot_si128(mask,b));
+}
+
+inline __m128  ei_pmax(const __m128&  a, const __m128&  b) { return _mm_max_ps(a,b); }
+inline __m128d ei_pmax(const __m128d& a, const __m128d& b) { return _mm_max_pd(a,b); }
+inline __m128i ei_pmax(const __m128i& a, const __m128i& b)
+{
+  __m128i mask = _mm_cmpgt_epi32(a,b);
+  return _mm_or_si128(_mm_and_si128(mask,a),_mm_andnot_si128(mask,b));
+}
+
+inline __m128  ei_pload(const float*   from) { return _mm_load_ps(from); }
+inline __m128d ei_pload(const double*  from) { return _mm_load_pd(from); }
+inline __m128i ei_pload(const __m128i* from) { return _mm_load_si128(from); }
+
+inline __m128  ei_pload1(const float*  from) { return _mm_load1_ps(from); }
+inline __m128d ei_pload1(const double* from) { return _mm_load1_pd(from); }
+inline __m128i ei_pload1(const int*    from) { return _mm_set1_epi32(*from); }
+
+inline __m128  ei_pset1(const float&  from) { return _mm_set1_ps(from); }
+inline __m128d ei_pset1(const double& from) { return _mm_set1_pd(from); }
+inline __m128i ei_pset1(const int&    from) { return _mm_set1_epi32(from); }
+
+inline void ei_pstore(float*   to, const __m128&  from) { _mm_store_ps(to, from); }
+inline void ei_pstore(double*  to, const __m128d& from) { _mm_store_pd(to, from); }
+inline void ei_pstore(__m128i* to, const __m128i& from) { _mm_store_si128(to, from); }
+
+inline float  ei_pfirst(const __m128&  a) { return _mm_cvtss_f32(a); }
+inline double ei_pfirst(const __m128d& a) { return _mm_cvtsd_f64(a); }
+inline int    ei_pfirst(const __m128i& a) { return _mm_cvtsi128_si32(a); }
+
+#endif
+
+#endif // EIGEN_PACKET_MATH_H
+