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clarify simd_relaxed_fma non-determinism #133844

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Dec 5, 2024
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clarify simd_relaxed_fma non-determinism #133844

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3 changes: 2 additions & 1 deletion library/core/src/intrinsics/simd.rs
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Expand Up @@ -619,7 +619,8 @@ extern "rust-intrinsic" {
/// set has support for a fused operation, and that the fused operation is more efficient
/// than the equivalent, separate pair of mul and add instructions. It is unspecified
/// whether or not a fused operation is selected, and that may depend on optimization
/// level and context, for example.
/// level and context, for example. It may even be the case that some SIMD lanes get fused
/// and others do not.
///
/// `T` must be a vector of floats.
#[cfg(not(bootstrap))]
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