mirror of https://github.com/rust-lang/rust
92 lines
3.2 KiB
Rust
92 lines
3.2 KiB
Rust
//@ run-pass
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//@ ignore-emscripten
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#![allow(non_camel_case_types)]
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#![feature(repr_simd, intrinsics)]
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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)]
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struct I32<const N: usize>([i32; N]);
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extern "rust-intrinsic" {
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fn simd_saturating_add<T>(x: T, y: T) -> T;
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fn simd_saturating_sub<T>(x: T, y: T) -> T;
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}
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fn main() {
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// unsigned
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{
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const M: u32 = u32::MAX;
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let a = u32x4(1, 2, 3, 4);
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let b = u32x4(2, 4, 6, 8);
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let m = u32x4(M, M, M, M);
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let m1 = u32x4(M - 1, M - 1, M - 1, M - 1);
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let z = u32x4(0, 0, 0, 0);
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unsafe {
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assert_eq!(simd_saturating_add(z, z), z);
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assert_eq!(simd_saturating_add(z, a), a);
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assert_eq!(simd_saturating_add(b, z), b);
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assert_eq!(simd_saturating_add(a, a), b);
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assert_eq!(simd_saturating_add(a, m), m);
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assert_eq!(simd_saturating_add(m, b), m);
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assert_eq!(simd_saturating_add(m1, a), m);
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assert_eq!(simd_saturating_sub(b, z), b);
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assert_eq!(simd_saturating_sub(b, a), a);
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assert_eq!(simd_saturating_sub(a, a), z);
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assert_eq!(simd_saturating_sub(a, b), z);
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assert_eq!(simd_saturating_sub(a, m1), z);
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assert_eq!(simd_saturating_sub(b, m1), z);
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}
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}
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// signed
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{
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const MIN: i32 = i32::MIN;
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const MAX: i32 = i32::MAX;
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let a = I32::<4>([1, 2, 3, 4]);
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let b = I32::<4>([2, 4, 6, 8]);
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let c = I32::<4>([-1, -2, -3, -4]);
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let d = I32::<4>([-2, -4, -6, -8]);
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let max = I32::<4>([MAX, MAX, MAX, MAX]);
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let max1 = I32::<4>([MAX - 1, MAX - 1, MAX - 1, MAX - 1]);
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let min = I32::<4>([MIN, MIN, MIN, MIN]);
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let min1 = I32::<4>([MIN + 1, MIN + 1, MIN + 1, MIN + 1]);
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let z = I32::<4>([0, 0, 0, 0]);
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unsafe {
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assert_eq!(simd_saturating_add(z, z).0, z.0);
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assert_eq!(simd_saturating_add(z, a).0, a.0);
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assert_eq!(simd_saturating_add(b, z).0, b.0);
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assert_eq!(simd_saturating_add(a, a).0, b.0);
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assert_eq!(simd_saturating_add(a, max).0, max.0);
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assert_eq!(simd_saturating_add(max, b).0, max.0);
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assert_eq!(simd_saturating_add(max1, a).0, max.0);
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assert_eq!(simd_saturating_add(min1, z).0, min1.0);
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assert_eq!(simd_saturating_add(min, z).0, min.0);
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assert_eq!(simd_saturating_add(min1, c).0, min.0);
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assert_eq!(simd_saturating_add(min, c).0, min.0);
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assert_eq!(simd_saturating_add(min1, d).0, min.0);
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assert_eq!(simd_saturating_add(min, d).0, min.0);
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assert_eq!(simd_saturating_sub(b, z).0, b.0);
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assert_eq!(simd_saturating_sub(b, a).0, a.0);
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assert_eq!(simd_saturating_sub(a, a).0, z.0);
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assert_eq!(simd_saturating_sub(a, b).0, c.0);
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assert_eq!(simd_saturating_sub(z, max).0, min1.0);
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assert_eq!(simd_saturating_sub(min1, z).0, min1.0);
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assert_eq!(simd_saturating_sub(min1, a).0, min.0);
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assert_eq!(simd_saturating_sub(min1, b).0, min.0);
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}
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}
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}
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