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A comment on Iguana: fast SIMD-optimized decompression. Parent comment

Re:Iguana: fast SIMD-optimized decompression by pjc50 on Thursday June 01, 2023 @06:25AM (#36149343)
So .. what's the vector set that people should be targeting for wide compatibility these days?
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Re:Iguana: fast SIMD-optimized decompression by powturbo on Thursday June 01, 2023 @06:32AM (#36149389)
Ideally, dynamic detecting cpu isa (sse/avx2/avx512) and respectively dispatching, used in most of my projects for ex. [1] and [2]

- [1] https://github.com/powturbo/Turbo-Range-Coder

- [2] https://github.com/powturbo/Turbo-Base64

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Re:Iguana: fast SIMD-optimized decompression by adgjlsfhk1 on Thursday June 01, 2023 @12:18PM (#36153362)
honestly you can probably stop supporting pre avx2 for a lot of use cases. avx2 is 2014 so those machines are pretty much at end of life. this also has the advantage that it lets you assume native fma hardware
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Re:Iguana: fast SIMD-optimized decompression by duped on Thursday June 01, 2023 @10:28AM (#36151514)
You can use function multiversioning (1) to provide multiple implementations of the same function for different targets that is selected at runtime.

(1) https://releases.llvm.org/7.0.0/tools/clang/docs/AttributeRe...

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