mirror of https://github.com/rust-lang/rust
34 lines
980 B
Rust
34 lines
980 B
Rust
//@ run-pass
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#![feature(repr_simd, intrinsics)]
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extern "rust-intrinsic" {
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fn simd_masked_load<M, P, T>(mask: M, pointer: P, values: T) -> T;
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fn simd_masked_store<M, P, T>(mask: M, pointer: P, values: T) -> ();
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}
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#[derive(Copy, Clone)]
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#[repr(simd)]
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struct Simd<T, const N: usize>([T; N]);
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fn main() {
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unsafe {
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let a = Simd::<u8, 4>([0, 1, 2, 3]);
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let b_src = [4u8, 5, 6, 7];
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let b_default = Simd::<u8, 4>([9; 4]);
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let b: Simd::<u8, 4> = simd_masked_load(
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Simd::<i8, 4>([-1, 0, -1, -1]),
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b_src.as_ptr(),
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b_default
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);
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assert_eq!(&b.0, &[4, 9, 6, 7]);
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let mut output = [u8::MAX; 5];
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simd_masked_store(Simd::<i8, 4>([-1, -1, -1, 0]), output.as_mut_ptr(), a);
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assert_eq!(&output, &[0, 1, 2, u8::MAX, u8::MAX]);
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simd_masked_store(Simd::<i8, 4>([0, -1, -1, 0]), output[1..].as_mut_ptr(), b);
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assert_eq!(&output, &[0, 1, 9, 6, u8::MAX]);
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}
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}
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