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76 lines
2.6 KiB
Python
76 lines
2.6 KiB
Python
# Copyright 2018 The JAX Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from functools import partial
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import numpy as np
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from jax._src import ad_util
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from jax import core
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from jax._src import dtypes
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from jax._src import traceback_util
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traceback_util.register_exclusion(__file__)
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UnshapedArray = core.UnshapedArray
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ShapedArray = core.ShapedArray
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ConcreteArray = core.ConcreteArray
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AbstractToken = core.AbstractToken
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abstract_token = core.abstract_token
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canonicalize_shape = core.canonicalize_shape
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raise_to_shaped = core.raise_to_shaped
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def make_shaped_array(x):
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dtype = dtypes.canonicalize_dtype(dtypes.result_type(x))
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return ShapedArray(np.shape(x), dtype)
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def zeros_like_array(x):
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dtype, weak_type = dtypes._lattice_result_type(x)
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dtype = dtypes.canonicalize_dtype(dtype)
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aval = ShapedArray(np.shape(x), dtype, weak_type=weak_type)
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return ad_util.zeros_like_aval(aval)
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array_types = {np.ndarray, np.bool_,
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np.int8, np.int16, np.int32, np.int64,
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np.uint8, np.uint16, np.uint32, np.uint64,
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dtypes.bfloat16, np.float16, np.float32, np.float64,
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np.complex64, np.complex128,
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np.longlong, np.intc}
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def canonical_concrete_aval(val, weak_type=None):
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return ConcreteArray(dtypes.canonicalize_dtype(np.result_type(val)), val,
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weak_type=weak_type)
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for t in array_types:
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core.pytype_aval_mappings[t] = canonical_concrete_aval
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ad_util.jaxval_zeros_likers[t] = zeros_like_array
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core.literalable_types.update(array_types)
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def _zeros_like_python_scalar(t, x):
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dtype = dtypes.canonicalize_dtype(dtypes.python_scalar_dtypes[t])
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aval = core.ShapedArray((), dtype, weak_type=True)
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return ad_util.zeros_like_aval(aval)
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def _make_concrete_python_scalar(t, x):
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dtype = dtypes._scalar_type_to_dtype(t, x)
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return canonical_concrete_aval(np.array(x, dtype=dtype), weak_type=True)
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for t in dtypes.python_scalar_dtypes:
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core.pytype_aval_mappings[t] = partial(_make_concrete_python_scalar, t)
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ad_util.jaxval_zeros_likers[t] = partial(_zeros_like_python_scalar, t)
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core.literalable_types.update(dtypes.python_scalar_dtypes.keys()) # type: ignore
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