1 files changed, 47 insertions, 0 deletions
diff --git a/tensorflow/compiler/xla/service/cpu/cpu_runtime_sse4_1.cc b/tensorflow/compiler/xla/service/cpu/cpu_runtime_sse4_1.cc
new file mode 100644
index 0000000000..69d04427c6
--- /dev/null
+++ b/tensorflow/compiler/xla/service/cpu/cpu_runtime_sse4_1.cc
@@ -0,0 +1,47 @@
+/* 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.
+==============================================================================*/
+
+#include "tensorflow/compiler/xla/service/cpu/cpu_runtime_sse4_1.h"
+
+#define EIGEN_USE_THREADS
+
+#include "third_party/eigen3/Eigen/Core"
+
+namespace xla {
+namespace cpu {
+namespace runtime {
+
+#ifdef __SSE4_1__
+
+V4F32 ExpV4F32(V4F32 x) {
+  Eigen::internal::Packet4f p = x;
+  return Eigen::internal::pexp(p);
+}
+
+V4F32 LogV4F32(V4F32 x) {
+  Eigen::internal::Packet4f p = x;
+  return Eigen::internal::plog(p);
+}
+
+V4F32 TanhV4F32(V4F32 x) {
+  Eigen::internal::Packet4f p = x;
+  return Eigen::internal::ptanh(p);
+}
+
+#endif  // __SSE4_1__
+
+}  // namespace runtime
+}  // namespace cpu
+}  // namespace xla