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Source code for torch.cuda.amp.autocast_mode

# mypy: allow-untyped-defs
import functools
from typing import Any
from typing_extensions import deprecated

import torch


__all__ = ["autocast", "custom_fwd", "custom_bwd"]


[docs]class autocast(torch.amp.autocast_mode.autocast): r"""See :class:`torch.autocast`. ``torch.cuda.amp.autocast(args...)`` is deprecated. Please use ``torch.amp.autocast("cuda", args...)`` instead. """ @deprecated( "`torch.cuda.amp.autocast(args...)` is deprecated. " "Please use `torch.amp.autocast('cuda', args...)` instead.", category=FutureWarning, ) def __init__( self, enabled: bool = True, dtype: torch.dtype = torch.float16, cache_enabled: bool = True, ): if torch._jit_internal.is_scripting(): self._enabled = enabled self.device = "cuda" self.fast_dtype = dtype return super().__init__( "cuda", enabled=enabled, dtype=dtype, cache_enabled=cache_enabled ) def __enter__(self): if torch._jit_internal.is_scripting(): return self return super().__enter__() # TODO: discuss a unified TorchScript-friendly API for autocast def __exit__(self, exc_type: Any, exc_val: Any, exc_tb: Any): # type: ignore[override] if torch._jit_internal.is_scripting(): return return super().__exit__(exc_type, exc_val, exc_tb) def __call__(self, func): if torch._jit_internal.is_scripting(): return func return super().__call__(func)
# Preserved only for BC reasons @deprecated( "`torch.cuda.amp.autocast_mode._cast(value, dtype)` is deprecated. " "Please use `torch.amp.autocast_mode._cast(value, 'cuda', dtype)` instead.", category=FutureWarning, ) def _cast(value, dtype): return torch.amp.autocast_mode._cast(value, "cuda", dtype)
[docs]@deprecated( "`torch.cuda.amp.custom_fwd(args...)` is deprecated. " "Please use `torch.amp.custom_fwd(args..., device_type='cuda')` instead.", category=FutureWarning, ) def custom_fwd(fwd=None, *, cast_inputs=None): """ ``torch.cuda.amp.custom_fwd(args...)`` is deprecated. Please use ``torch.amp.custom_fwd(args..., device_type='cuda')`` instead. """ return functools.partial(torch.amp.custom_fwd, device_type="cuda")( fwd=fwd, cast_inputs=cast_inputs )
[docs]@deprecated( "`torch.cuda.amp.custom_bwd(args...)` is deprecated. " "Please use `torch.amp.custom_bwd(args..., device_type='cuda')` instead.", category=FutureWarning, ) def custom_bwd(bwd): """ ``torch.cuda.amp.custom_bwd(args...)`` is deprecated. Please use ``torch.amp.custom_bwd(args..., device_type='cuda')`` instead. """ return functools.partial(torch.amp.custom_bwd, device_type="cuda")(bwd)

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