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Float -> Float
Map all floating-point arithmetic outputs that result in a NaN value to a single, consistent, platform-independent bit pattern.
Problem it solves
Varying host processor architectures propagate different NaN payloads, causing identical WebAssembly binaries to diverge in execution state across different systems.
Consumes
Emits
The real projects this mechanism was found in. Attribution is the point — this is how the best teams actually do it.