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simd intrinsics: add simd_shuffle_generic

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This commit is contained in:
Ralf Jung 2023-12-22 12:31:59 +01:00
parent 68125c72d3
commit d96f0c382f
1 changed files with 16 additions and 3 deletions
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19
library/core/src/intrinsics/simd.rs
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@ -190,14 +190,27 @@ extern "platform-intrinsic" {
///
/// `T` must be a vector.
///
/// `U` must be a const array of `i32`s.
/// `U` must be a **const** array of `i32`s. This means it must either refer to a named
/// const or be given as an inline const expression (`const { ... }`).
///
/// `V` must be a vector with the same element type as `T` and the same length as `U`.
///
/// Concatenates `x` and `y`, then returns a new vector such that each element is selected from
/// the concatenation by the matching index in `idx`.
/// Returns a new vector such that element `i` is selected from `xy[idx[i]]`, where `xy`
/// is the concatenation of `x` and `y`. It is a compile-time error if `idx[i]` is out-of-bounds
/// of `xy`.
pub fn simd_shuffle<T, U, V>(x: T, y: T, idx: U) -> V;
/// Shuffle two vectors by const indices.
///
/// `T` must be a vector.
///
/// `V` must be a vector with the same element type as `T` and the same length as `IDX`.
///
/// Returns a new vector such that element `i` is selected from `xy[IDX[i]]`, where `xy`
/// is the concatenation of `x` and `y`. It is a compile-time error if `IDX[i]` is out-of-bounds
/// of `xy`.
pub fn simd_shuffle_generic<T, U, const IDX: &'static [u32]>(x: T, y: T) -> U;
/// Read a vector of pointers.
///
/// `T` must be a vector.