# Copyright 2022 AlQuraishi Laboratory
#
# 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.
import importlib

deepspeed_is_installed = importlib.util.find_spec("deepspeed") is not None
if(deepspeed_is_installed):
    import deepspeed

import torch

def is_fp16_enabled():
    # Autocast world
    fp16_enabled = torch.get_autocast_gpu_dtype() == torch.float16
    fp16_enabled = fp16_enabled and torch.is_autocast_enabled()

    # DeepSpeed world
    deepspeed_is_initialized = (
        deepspeed_is_installed and 
        deepspeed.utils.is_initialized()
    )
    print(dir(deepspeed))

    return fp16_enabled
