mirror of https://github.com/rust-lang/rust
53 lines
1.4 KiB
Rust
53 lines
1.4 KiB
Rust
//@ run-pass
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// Test that simd gather instructions on slice of usize don't cause crash
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// See issue #89183 - https://github.com/rust-lang/rust/issues/89193
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#![feature(repr_simd, intrinsics)]
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#![allow(non_camel_case_types)]
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#[repr(simd)]
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#[derive(Copy, Clone, PartialEq, Debug)]
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struct x4<T>(pub T, pub T, pub T, pub T);
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extern "rust-intrinsic" {
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fn simd_gather<T, U, V>(x: T, y: U, z: V) -> T;
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}
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fn main() {
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let x: [usize; 4] = [10, 11, 12, 13];
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let default = x4(0_usize, 1, 2, 3);
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let all_set = u8::MAX as i8; // aka -1
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let mask = x4(all_set, all_set, all_set, all_set);
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let expected = x4(10_usize, 11, 12, 13);
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unsafe {
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let pointer = x.as_ptr();
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let pointers = x4(
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pointer.offset(0),
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pointer.offset(1),
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pointer.offset(2),
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pointer.offset(3)
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);
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let result = simd_gather(default, pointers, mask);
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assert_eq!(result, expected);
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}
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// and again for isize
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let x: [isize; 4] = [10, 11, 12, 13];
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let default = x4(0_isize, 1, 2, 3);
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let expected = x4(10_isize, 11, 12, 13);
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unsafe {
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let pointer = x.as_ptr();
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let pointers = x4(
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pointer.offset(0),
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pointer.offset(1),
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pointer.offset(2),
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pointer.offset(3)
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);
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let result = simd_gather(default, pointers, mask);
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assert_eq!(result, expected);
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}
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}
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