maligned
portable-simd
| maligned | portable-simd | |
|---|---|---|
| 1 | 19 | |
| 1 | 827 | |
| - | 1.3% | |
| 0.0 | 8.6 | |
| over 1 year ago | about 1 month ago | |
| Rust | Rust | |
| - | Apache License 2.0 |
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maligned
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Mutually aligned vectors?
Some initial thoughts: - Using #[repr(C, align(N))] on a new type around Vec doesn't seem to work because it will not impact the allocation of the internal growable buffer. - Monkeying around with the initial allocation may work, though I am unfamiliar as yet with the allocator API or using the global allocator to specify layouts. From reading online, it seemed like when you copy or grow your vector you may lose your work. - There are a few crates that offer aligned vectors like aligned-vec and maligned. Going back and forth between these the std::simd API might add some complexity, and I am also concerned about potential unsoundness in external crates (both of these authors are far beyond me, so this is not meant to be a criticism of them).
portable-simd
- Rust-lang/portable-SIMD: The testing ground for the future of portable SIMD
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Let's thank who have helped us in the Rust Community together!
Jubilee and Caleb Zulawski for their tireless work on the portable SIMD project. It will land, some day, and when it does it's going to be an amazing boon for the project.
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Mutually aligned vectors?
The portable SIMD project implements an as_simd() function for slices. The basics are that you get 3 slices and the middle one is a SIMD slice. It allows for fast aligned loads of the data, which could matter if your algorithm is becoming memory bound; it is also a convenient and safe abstraction. In my case, I actually have 2 vectors (say, x and y). I can take them apart using as_simd() like so:
- Code review: deinterlacing a RGBA colour buffer with std::simd
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Base64 Encoding Performance: Java vs Rust
Rust has generics and monomorphization. You can write the algorithm once and compile for multiple targets. rust-lang/portable-simd
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Zen4's AVX512 Teardown
This Rust issue [0] was the best short summary of what an SIMD Shuffle is I could find:
„A "shuffle", in SIMD terms, takes a SIMD vector (or possibly two vectors) and a pattern of source lane indexes (usually as an immediate), and then produces a new SIMD vector where the output is the source lane values in the pattern given.“
[0] https://github.com/rust-lang/portable-simd/issues/11
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possibility of blas natively in Rust
Yet by default it generates code which is only compatible with Pentium4 or newer. In fact lots of serious issues relate to older CPUs and rustc developers plan is to declare them closed when they would be able to drop i686 support (all AMD CPUs which support SSE2 support x86-64, too while Intel situation is mess).
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Best portable simd library for stable rust?
The standard API crate for portable simd is at https://github.com/rust-lang/portable-simd, but using this requires nightly, which I don't want to do. I'd like to use a crate for simd that works on both x86_64 and wasm in stable rust. wide looks fine for this purpose. Are there any potentially better choices?
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Any plans for built-in support of Vec2/Vec3/Vec4 in Rust?
See: https://github.com/rust-lang/portable-simd
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Hey Rustaceans! Got a question? Ask here! (28/2022)!
As for portable SIMD, there's relatively recent activity (last commit 20 days ago) on this repository: https://github.com/rust-lang/portable-simd
What are some alternatives?
fast_image_resize - Rust library for fast image resizing with using of SIMD instructions.
rust-base64 - base64, in rust
faster-hex - fast hex
config-rs - ⚙️ Layered configuration system for Rust applications (with strong support for 12-factor applications).
cargo-about - 📜 Cargo plugin to generate list of all licenses for a crate 🦀
ulid-rs - This is a Rust implementation of the ulid project
ulid-lite - Generate unique, yet sortable identifiers
swift-bridge - swift-bridge facilitates Rust and Swift interop.
openblas-src - Source of BLAS and LAPACK via OpenBLAS
intel-mkl-src - Redistribute Intel MKL as a crate
rand - A Rust library for random number generation.
regex - An implementation of regular expressions for Rust. This implementation uses finite automata and guarantees linear time matching on all inputs.