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Per [1], MinGW has an incorrect fma implementation. This showed up in tests run with cranelift after adding float math operations to `core`. Presumably we hadn't noticed this when running tests with LLVM because LLVM was constant folding the result away. Rust issue: https://github.com/rust-lang/rust/issues/140515 [1]: https://sourceforge.net/p/mingw-w64/bugs/848/