# Copyright 2020 Google LLC
#
# 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
#
# https://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.
__all__ = ['celu', 'elu', 'leaky_relu', 'log_sigmoid', 'log_softmax', 'logsumexp', 'relu',
'selu', 'sigmoid', 'softmax', 'softplus', 'tanh']
import jax.nn.functions as jnnf
import jax.scipy.special
from jax import lax
from objax.typing import JaxArray
celu = jnnf.celu
elu = jnnf.elu
leaky_relu = jnnf.leaky_relu
log_sigmoid = jnnf.log_sigmoid
log_softmax = jnnf.log_softmax
logsumexp = jax.scipy.special.logsumexp
selu = jnnf.selu
sigmoid = jnnf.sigmoid
softmax = jnnf.softmax
softplus = jnnf.softplus
tanh = lax.tanh
# Have to redefine relu since jnnf.relu isn't pickable.
[docs]def relu(x: JaxArray) -> JaxArray:
"""Rectified linear unit activation function.
Args:
x: input tensor.
Returns:
tensor with the element-wise output relu(x) = max(x, 0).
"""
return jnnf.relu(x)