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diff --git a/tensorflow/compiler/xla/service/cpu/cpu_runtime_sse4_1.h b/tensorflow/compiler/xla/service/cpu/cpu_runtime_sse4_1.h
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+/* Copyright 2017 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.
+==============================================================================*/
+
+// This header declares functions which may be called by the generated code on
+// the CPU. Calls to these functions must be resolved explicitly in the JIT in
+// xla::cpu::SimpleResolver.  It also defines a per-CpuExecutable context
+// which is used to cache expensive state and resources utilized by the
+// aforementioned functions.
+
+#ifndef TENSORFLOW_COMPILER_XLA_SERVICE_CPU_CPU_RUNTIME_SSE4_1_H_
+#define TENSORFLOW_COMPILER_XLA_SERVICE_CPU_CPU_RUNTIME_SSE4_1_H_
+
+#include "tensorflow/core/platform/macros.h"
+
+namespace xla {
+namespace cpu {
+namespace runtime {
+
+constexpr char kExpV4F32[] = "__xla_cpu_runtime_ExpV4F32";
+constexpr char kLogV4F32[] = "__xla_cpu_runtime_LogV4F32";
+constexpr char kTanhV4F32[] = "__xla_cpu_runtime_TanhV4F32";
+
+typedef float V4F32 __attribute__((__vector_size__(16)));
+
+// The following functions are vectorized versions of a selection of libm
+// library functions.
+// References to these functions are created by the LLVM vectorizer.
+V4F32 ExpV4F32(V4F32 x) TF_ATTRIBUTE_WEAK;
+
+V4F32 LogV4F32(V4F32 x) TF_ATTRIBUTE_WEAK;
+
+V4F32 TanhV4F32(V4F32 x) TF_ATTRIBUTE_WEAK;
+
+}  // namespace runtime
+}  // namespace cpu
+}  // namespace xla
+
+#endif  // TENSORFLOW_COMPILER_XLA_SERVICE_CPU_CPU_RUNTIME_SSE4_1_H_