Tried to convert some SSE4.1 code to SSE2 by adjusting rounding modes and discovered some sadness:https://github.com/rust-lang/rust/issues/72252 …
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(It’s been WIP for a few years, so don’t take this as a “it’ll be fixed next week” thing, but this time I think it will stick.)
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But: you’ll need to get Rust bindings for the “constrained floating-point intrinsics” when this work lands—the “normal” floating-point IR nodes would still be able to move across mode changes.
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