1 files changed, 32 insertions, 0 deletions
diff --git a/tensorflow/python/ops/manip_grad.py b/tensorflow/python/ops/manip_grad.py
new file mode 100644
index 0000000000..573e8c0a0d
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+++ b/tensorflow/python/ops/manip_grad.py
@@ -0,0 +1,32 @@
+# 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.
+# ==============================================================================
+
+"""Gradients for operators defined in manip_ops.py."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from tensorflow.python.framework import ops
+from tensorflow.python.ops import manip_ops
+
+
+@ops.RegisterGradient("Roll")
+def _RollGrad(op, grad):
+  # The gradient is just the roll reversed
+  shift = op.inputs[1]
+  axis = op.inputs[2]
+  roll_grad = manip_ops.roll(grad, -shift, axis)
+  return roll_grad, None, None