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# Copyright 2024 MIT Han Lab
#
# 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.
#
# SPDX-License-Identifier: Apache-2.0
from functools import partial
from typing import Optional
import torch.nn as nn
from ...models.utils import build_kwargs_from_config
__all__ = ["build_act"]
# register activation function here
REGISTERED_ACT_DICT: dict[str, type] = {
"relu": nn.ReLU,
"relu6": nn.ReLU6,
"hswish": nn.Hardswish,
"silu": nn.SiLU,
"gelu": partial(nn.GELU, approximate="tanh"),
}
def build_act(name: str, **kwargs) -> Optional[nn.Module]:
if name in REGISTERED_ACT_DICT:
act_cls = REGISTERED_ACT_DICT[name]
args = build_kwargs_from_config(kwargs, act_cls)
return act_cls(**args)
else:
return None
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