|
- # Copyright 2021 Huawei Technologies Co., Ltd
- #
- # 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.
- # ===========================================================================
- """generate json desc for Sigmoid"""
- from ._utils import Expander
-
-
- class Sigmoid(Expander):
- """Sigmoid expander"""
-
- def _expand(self, graph_builder):
- input_x = self.inputs[0]
- # Calculate sigmoid(x)
- # sigmoid of x is 1 / (1 + exp(-x))
- const_one = graph_builder.value(input_x.dtype, 1.0)
- neg_x = graph_builder.emit('Neg', [input_x])
- exp_neg_x = graph_builder.emit('Exp', [neg_x])
- add_exp = graph_builder.emit('Add', [const_one, exp_neg_x])
- res = graph_builder.emit('RealDiv', [const_one, add_exp])
- return res
|
