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refactor(users/edef/refscan): switch to intrinsics

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packed_simd is deprecated, but we don't need very much SIMD:
  * _mm256_set1_epi8 / vpbroadcastb (splat)
  * _mm256_cmpgt_epi8 / vpcmpgtb (comparison)
  * _mm256_movemask_epi8 / vpmovmskb (compress to bitmask)

This also simplifies the code by only vectorising the bare minimum,
since we just get a bitmask and operate in scalar mode as soon as
possible.

We don't need nightly Rust anymore: we're using only stable intrinsics.

Change-Id: Id410b5fef2549f3c97f48049f722f1e643e68553
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7687
Reviewed-by: edef <edef@edef.eu>
Tested-by: BuildkiteCI
This commit is contained in:
edef 2023-01-09 23:16:21 +00:00
parent 0b3c0725a2
commit cb764e87de
3 changed files with 41 additions and 25 deletions
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20
users/edef/refscan/Cargo.lock generated
View file

@ -1,25 +1,7 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
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source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
]
version = 3
[[package]]
name = "refscan"
version = "0.1.0"
dependencies = [
"packed_simd 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
]
[metadata]
"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
"checksum packed_simd 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a85ea9fc0d4ac0deb6fe7911d38786b32fc11119afd9e9d38b84ff691ce64220"