64 lines
2.1 KiB
Rust
64 lines
2.1 KiB
Rust
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// rustfmt-wrap_comments: true
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//! Implements `From` and `Into` for vector types.
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macro_rules! impl_from_vector {
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([$elem_ty:ident; $elem_count:expr]: $id:ident | $test_tt:tt | $source:ident) => {
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impl From<$source> for $id {
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#[inline]
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fn from(source: $source) -> Self {
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fn static_assert_same_number_of_lanes<T, U>()
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where
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T: crate::sealed::Simd,
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U: crate::sealed::Simd<LanesType = T::LanesType>,
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{
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}
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use llvm::simd_cast;
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static_assert_same_number_of_lanes::<$id, $source>();
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Simd(unsafe { simd_cast(source.0) })
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}
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}
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// FIXME: `Into::into` is not inline, but due to
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// the blanket impl in `std`, which is not
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// marked `default`, we cannot override it here with
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// specialization.
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/*
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impl Into<$id> for $source {
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#[inline]
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fn into(self) -> $id {
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unsafe { simd_cast(self) }
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}
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}
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*/
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test_if!{
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$test_tt:
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interpolate_idents! {
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mod [$id _from_ $source] {
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use super::*;
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#[test]
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fn from() {
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assert_eq!($id::lanes(), $source::lanes());
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let source: $source = Default::default();
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let vec: $id = Default::default();
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let e = $id::from(source);
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assert_eq!(e, vec);
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let e: $id = source.into();
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assert_eq!(e, vec);
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}
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}
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}
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}
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};
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}
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macro_rules! impl_from_vectors {
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([$elem_ty:ident; $elem_count:expr]: $id:ident | $test_tt:tt | $($source:ident),*) => {
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$(
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impl_from_vector!([$elem_ty; $elem_count]: $id | $test_tt | $source);
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)*
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}
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}
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