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63 lines
1.4 KiB
Rust
63 lines
1.4 KiB
Rust
//@ run-pass
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#![allow(non_camel_case_types)]
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//@ ignore-emscripten
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//@ ignore-endian-big behavior of simd_bitmask is endian-specific
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// Test that the simd_bitmask intrinsic produces correct results.
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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 u32x4(pub u32, pub u32, pub u32, pub u32);
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#[repr(simd)]
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#[derive(Copy, Clone, PartialEq, Debug)]
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struct u8x4(pub u8, pub u8, pub u8, pub u8);
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#[repr(simd)]
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#[derive(Copy, Clone, PartialEq, Debug)]
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struct Tx4<T>(pub T, pub T, pub T, pub T);
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extern "rust-intrinsic" {
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fn simd_bitmask<T, U>(x: T) -> U;
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}
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fn main() {
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let z = u32x4(0, 0, 0, 0);
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let ez = 0_u8;
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let o = u32x4(!0, !0, !0, !0);
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let eo = 0b_1111_u8;
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let m0 = u32x4(!0, 0, !0, 0);
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let e0 = 0b_0000_0101_u8;
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// Check that the MSB is extracted:
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let m = u8x4(0b_1000_0000, 0b_0100_0001, 0b_1100_0001, 0b_1111_1111);
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let e = 0b_1101;
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// Check usize / isize
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let msize: Tx4<usize> = Tx4(usize::MAX, 0, usize::MAX, usize::MAX);
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unsafe {
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let r: u8 = simd_bitmask(z);
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assert_eq!(r, ez);
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let r: u8 = simd_bitmask(o);
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assert_eq!(r, eo);
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let r: u8 = simd_bitmask(m0);
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assert_eq!(r, e0);
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let r: u8 = simd_bitmask(m);
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assert_eq!(r, e);
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let r: u8 = simd_bitmask(msize);
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assert_eq!(r, e);
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}
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}
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