27 lines
720 B
Python
27 lines
720 B
Python
from typing import Callable, Tuple, cast
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from ..config import registry
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from ..model import Model
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from ..types import Floats2d, Ragged
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from ..util import ArrayInfo
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InT = Ragged
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OutT = Floats2d
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@registry.layers("reduce_max.v1")
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def reduce_max() -> Model[InT, OutT]:
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return Model("reduce_max", forward)
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def forward(model: Model[InT, OutT], Xr: InT, is_train: bool) -> Tuple[OutT, Callable]:
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Y, which = model.ops.reduce_max(cast(Floats2d, Xr.data), Xr.lengths)
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lengths = Xr.lengths
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array_info = ArrayInfo.from_array(Y)
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def backprop(dY: OutT) -> InT:
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array_info.check_consistency(dY)
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return Ragged(model.ops.backprop_reduce_max(dY, which, lengths), lengths)
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return Y, backprop
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