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SmallRng: Replace PCG algorithm with xoshiro{128,256}++ #1038

Merged
merged 8 commits into from Sep 15, 2020
Merged

SmallRng: Replace PCG algorithm with xoshiro{128,256}++ #1038

merged 8 commits into from Sep 15, 2020

Commits on Sep 15, 2020

  1. SmallRng: Replace PCG algorithm with xoshiro{128,256}++ 

    Due to close correlations of PCG streams (rust-random#907) and lack of right-state
propagation (rust-random#905), the `SmallRng` algorithm is switched to
xoshiro{128,256}++. The implementation is taken from the `rand_xoshiro`
crate and slightly simplified.

Fixes rust-random#910.
    @vks
    vks committed Sep 15, 2020
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  2. SmallRng: Recommend rand_chacha for performance 

    Also fix a wrong link.
    @vks
    vks committed Sep 15, 2020
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  3. Update changelog

    @vks
    vks committed Sep 15, 2020
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  4. Revise SmallRng advise

    @vks
    vks committed Sep 15, 2020
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  5. Fix dead links

    @vks
    vks committed Sep 15, 2020
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  6. xoshiro256++: Prefer upper bits

    @vks
    vks committed Sep 15, 2020
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  7. Migrate SmallRng::seed_from_u64 from PCG32 to SplitMix64

    @vks
    vks committed Sep 15, 2020
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  8. Improve SmallRng advise

    @vks
    vks committed Sep 15, 2020
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