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diff --git a/tensorflow/core/kernels/cwise_ops_gpu_gradients.cu.h b/tensorflow/core/kernels/cwise_ops_gpu_gradients.cu.h
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+/* Copyright 2015 The TensorFlow Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+==============================================================================*/
+
+#if !GOOGLE_CUDA
+#error This file must only be included when building with Cuda support
+#endif
+
+#ifndef TENSORFLOW_KERNELS_CWISE_OPS_GPU_GRADIENTS_CU_H_
+#define TENSORFLOW_KERNELS_CWISE_OPS_GPU_GRADIENTS_CU_H_
+
+#define EIGEN_USE_GPU
+
+#include <complex>
+
+#include "tensorflow/core/framework/tensor_types.h"
+#include "tensorflow/core/kernels/cwise_ops.h"
+#include "tensorflow/core/kernels/cwise_ops_gradients.h"
+#include "tensorflow/core/platform/types.h"
+
+#include "tensorflow/core/platform/logging.h"
+namespace tensorflow {
+namespace functor {
+
+typedef Eigen::GpuDevice GPUDevice;
+typedef std::complex<float> complex64;
+typedef std::complex<double> complex128;
+
+// Partial specialization of SimpleBinaryFunctor<Device=GPUDevice, Functor>.
+template <typename Functor>
+struct SimpleBinaryFunctor<GPUDevice, Functor> {
+ void operator()(const GPUDevice& d, typename Functor::tout_type out,
+ typename Functor::tin_type in1,
+ typename Functor::tin_type in2) {
+ To32Bit(out).device(d) =
+ To32Bit(in1).binaryExpr(in2, typename Functor::func());
+ }
+};
+
+// Macros to explicitly instantiate kernels on GPU for multiple types
+// (T0, T1, etc.) for SimpleBiaryFunctor (e.g., functor::tanh_grad).
+#define DEFINE_SIMPLE_BINARY1(F, T) \
+ template struct SimpleBinaryFunctor<GPUDevice, F<T> >
+#define DEFINE_SIMPLE_BINARY2(F, T0, T1) \
+ DEFINE_SIMPLE_BINARY1(F, T0); \
+ DEFINE_SIMPLE_BINARY1(F, T1)
+#define DEFINE_SIMPLE_BINARY3(F, T0, T1, T2) \
+ DEFINE_SIMPLE_BINARY2(F, T0, T1); \
+ DEFINE_SIMPLE_BINARY1(F, T2)
+#define DEFINE_SIMPLE_BINARY4(F, T0, T1, T2, T3) \
+ DEFINE_SIMPLE_BINARY2(F, T0, T1); \
+ DEFINE_SIMPLE_BINARY2(F, T2, T3)
+#define DEFINE_SIMPLE_BINARY5(F, T0, T1, T2, T3, T4) \
+ DEFINE_SIMPLE_BINARY2(F, T0, T1); \
+ DEFINE_SIMPLE_BINARY3(F, T2, T3, T4)
+
+} // end namespace functor
+} // end namespace tensorflow
+
+#endif // TENSORFLOW_KERNELS_CWISE_OPS_GPU_GRADIENTS_CU_H_