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RustCrypto
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stream-ciphers
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chacha20: add an AVX-512 backend
- #477
#477
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tarcieri
merged 10 commits into
RustCrypto:master
RustCrypto/stream-ciphers:master
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caelunshun:chacha20-avx512
caelunshun/stream-ciphers:chacha20-avx512
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Feb 4, 2026
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chacha20: add an AVX-512 backend
#477
tarcieri
merged 10 commits into
RustCrypto:master
RustCrypto/stream-ciphers:master
from
caelunshun:chacha20-avx512
caelunshun/stream-ciphers:chacha20-avx512
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Commits on Nov 1, 2025
Initial AVX-512 port of ChaCha20.
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Test PAR_BLOCKS=8
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Get back 256b performance by specializing gen_tail_blocks for AVX-512
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Add RNG support for avx512 (not benchmarked)
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Commits on Nov 3, 2025
chacha20 avx512: Refactor design to avoid using 512-bit path even for short inputs
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Add long input test for chacha20 to test AVX-512 full parallel implementation
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Remove AVX-512 RNG backend, since RNG doesn't expose enough parallelism to make it worth the complexity
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Gate AVX-512 behind chacha20_avx512 cfg
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Add CI to run AVX-512 backend (from aes CI config) and fix build with RNG feature
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Commits on Feb 2, 2026
Merge branch 'master' into chacha20-avx512
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