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diff --git a/third_party/eigen3/unsupported/Eigen/CXX11/FixedPoint b/third_party/eigen3/unsupported/Eigen/CXX11/FixedPoint
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+++ b/third_party/eigen3/unsupported/Eigen/CXX11/FixedPoint
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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2015 Benoit Steiner <benoit.steiner.goog@gmail.com>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef EIGEN_CXX11_FIXED_POINT_MODULE
+#define EIGEN_CXX11_FIXED_POINT_MODULE
+
+#include <Eigen/Core>
+#include <stdint.h>
+
+/** \defgroup CXX11_FixedPoint_Module Fixed Point Module
+  *
+  * This module provides common core features for all modules that
+  * explicitly depend on C++11. Currently, this is only the Tensor
+  * module. Note that at this stage, you should not need to include
+  * this module directly.
+  *
+  * It also provides a limited fallback for compilers that don't support
+  * CXX11 yet, such as nvcc.
+  *
+  * \code
+  * #include <Eigen/CXX11/FixedPoint>
+  * \endcode
+  */
+
+#include "src/FixedPoint/FixedPointTypes.h"
+
+// Use optimized implementations whenever available
+#ifdef EIGEN_VECTORIZE_AVX2
+#define EIGEN_USE_OPTIMIZED_INT8_UINT8_MAT_MAT_PRODUCT
+#include "src/Tensor/TensorContractionThreadPool.h"
+#include "src/FixedPoint/PacketMathAVX2.h"
+#include "src/FixedPoint/MatMatProductAVX2.h"
+#include "src/FixedPoint/TypeCastingAVX2.h"
+
+#elif defined EIGEN_VECTORIZE_NEON
+#define EIGEN_USE_OPTIMIZED_INT8_UINT8_MAT_MAT_PRODUCT
+#include "src/FixedPoint/MatMatProductNEON.h"
+#endif
+
+// Use the default implementation when no optimized code is available
+#include "src/FixedPoint/MatMatProduct.h"
+#include "src/FixedPoint/MatVecProduct.h"
+
+
+#endif // EIGEN_CXX11_FIXED_POINT_MODULE