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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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3
users/edef/refscan/Cargo.toml
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@ -5,6 +5,3 @@ authors = ["edef <edef@edef.eu>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
packed_simd = "0.3.3"