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Support 16-bit target platforms #2401

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Merged
merged 1 commit into from
Feb 27, 2025
Merged

Support 16-bit target platforms #2401

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8 changes: 8 additions & 0 deletions src/layout.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -117,11 +117,19 @@ impl DstLayout {
/// The alignment value must be a power of two from 1 up to
/// 2<sup>29</sup>.
#[cfg(not(kani))]
#[cfg(not(target_pointer_width = "16"))]
pub(crate) const CURRENT_MAX_ALIGN: NonZeroUsize = match NonZeroUsize::new(1 << 28) {
Some(max_align) => max_align,
None => const_unreachable!(),
};

#[cfg(not(kani))]
#[cfg(target_pointer_width = "16")]
pub(crate) const CURRENT_MAX_ALIGN: NonZeroUsize = match NonZeroUsize::new(1 << 15) {
Some(max_align) => max_align,
None => const_unreachable!(),
};

/// Constructs a `DstLayout` for a zero-sized type with `repr_align`
/// alignment (or 1). If `repr_align` is provided, then it must be a power
/// of two.
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1 change: 1 addition & 0 deletions src/util/macro_util.rs
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Expand Up @@ -98,6 +98,7 @@ impl<T, U> MaxAlignsOf<T, U> {
}
}

#[cfg(__ZEROCOPY_INTERNAL_USE_ONLY_NIGHTLY_FEATURES_IN_TESTS)]
const _64K: usize = 1 << 16;

// TODO(#29), TODO(https://github.com/rust-lang/rust/issues/69835): Remove this
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