ML-DSA: AVX2 target feature #642
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…rux into jonas/ml-dsa-target-feature
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This PR performs the same kind of restructuring to ML-DSA as #636 does to ML-KEM, i.e. once we know we're running on an AVX2 machine, manually enable AVX2 specific optimizations using
#[target_feature(enable = "avx2")]and then inline most functions that are further down in the call-tree.Doing this gets us really close to compiling the whole crate using
RUSTFLAGS="-C target-feature=+avx2"in terms of performance.It does mean even longer build times and probably even larger binaries, though.