4 // Test that the simd_{gather,scatter} intrinsics produce the correct results.
6 #![feature(repr_simd, platform_intrinsics)]
7 #![allow(non_camel_case_types)]
10 #[derive(Copy, Clone, PartialEq, Debug)]
11 struct x4<T>(pub T, pub T, pub T, pub T);
13 extern "platform-intrinsic" {
14 fn simd_gather<T, U, V>(x: T, y: U, z: V) -> T;
15 fn simd_scatter<T, U, V>(x: T, y: U, z: V) -> ();
19 let mut x = [0_f32, 1., 2., 3., 4., 5., 6., 7.];
21 let default = x4(-3_f32, -3., -3., -3.);
22 let s_strided = x4(0_f32, 2., -3., 6.);
23 let mask = x4(-1_i32, -1, 0, -1);
25 // reading from *const
27 let pointer = &x[0] as *const f32;
29 pointer.offset(0) as *const f32,
35 let r_strided = simd_gather(default, pointers, mask);
37 assert_eq!(r_strided, s_strided);
42 let pointer = &mut x[0] as *mut f32;
44 pointer.offset(0) as *mut f32,
50 let r_strided = simd_gather(default, pointers, mask);
52 assert_eq!(r_strided, s_strided);
57 let pointer = &mut x[0] as *mut f32;
59 pointer.offset(0) as *mut f32,
65 let values = x4(42_f32, 43_f32, 44_f32, 45_f32);
66 simd_scatter(values, pointers, mask);
68 assert_eq!(x, [42., 1., 43., 3., 4., 5., 45., 7.]);
71 // test modifying array of *const f32
83 let default = x4(y[0], y[0], y[0], y[0]);
84 let s_strided = x4(y[0], y[2], y[0], y[6]);
86 // reading from *const
88 let pointer = &y[0] as *const *const f32;
90 pointer.offset(0) as *const *const f32,
96 let r_strided = simd_gather(default, pointers, mask);
98 assert_eq!(r_strided, s_strided);
103 let pointer = &mut y[0] as *mut *const f32;
105 pointer.offset(0) as *mut *const f32,
111 let r_strided = simd_gather(default, pointers, mask);
113 assert_eq!(r_strided, s_strided);
118 let pointer = &mut y[0] as *mut *const f32;
120 pointer.offset(0) as *mut *const f32,
126 let values = x4(y[7], y[6], y[5], y[1]);
127 simd_scatter(values, pointers, mask);