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1. factor out rbg_prng_impl and unsafe_rbg_prng_impl. the former uses threefry2x32 for split and fold_in, while the latter uses untested heuristics based on calling rng_bit_generator itself as a kind of hash function 2. for unsafe_rbg_prng_impl's split and fold_in, generate longer sequences from rng_bit_generator (10x iterations) which may be useful on some backends 3. for unsafe_rbg_prng_impl, actually apply rng_bit_generator as our 'hash function' in fold_in Co-authored-by: Roy Frostig <frostig@google.com> Co-authored-by: Anselm Levskaya <levskaya@google.com>
26 lines
884 B
Python
26 lines
884 B
Python
# Copyright 2021 Google LLC
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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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# flake8: noqa: F401
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from jax._src.prng import (
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PRNGImpl as PRNGImpl,
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seed_with_impl as seed_with_impl,
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threefry2x32_p as threefry2x32_p,
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threefry_2x32 as threefry_2x32,
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threefry_prng_impl as threefry_prng_impl,
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rbg_prng_impl as rbg_prng_impl,
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unsafe_rbg_prng_impl as unsafe_rbg_prng_impl,
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)
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