laywerrobot/lib/python3.6/site-packages/tensorflow/python/ops/manip_grad.py
2020-08-27 21:55:39 +02:00

31 lines
1.1 KiB
Python

# 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