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this post was submitted on 09 Oct 2023
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What happens if you go from x86 to ARM or whatever? Do they have fallbacks or other separate implementations, then? I mostly do high level languages so I'm not that familiar with microoptimization.
Looks like it's also done for ARM. https://twitter.com/FFmpeg/status/1710970016777052326
It would have to be different implementations for different architectures, and so almost definitely have a C-based fallback