1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
//@ run-pass
#![allow(non_camel_case_types)]
//@ ignore-emscripten
//@ ignore-endian-big behavior of simd_bitmask is endian-specific
// Test that the simd_bitmask intrinsic produces correct results.
#![feature(repr_simd, intrinsics)]
#[allow(non_camel_case_types)]
#[repr(simd)]
#[derive(Copy, Clone, PartialEq, Debug)]
struct u32x4(pub u32, pub u32, pub u32, pub u32);
#[repr(simd)]
#[derive(Copy, Clone, PartialEq, Debug)]
struct u8x4(pub u8, pub u8, pub u8, pub u8);
#[repr(simd)]
#[derive(Copy, Clone, PartialEq, Debug)]
struct Tx4<T>(pub T, pub T, pub T, pub T);
extern "rust-intrinsic" {
fn simd_bitmask<T, U>(x: T) -> U;
}
fn main() {
let z = u32x4(0, 0, 0, 0);
let ez = 0_u8;
let o = u32x4(!0, !0, !0, !0);
let eo = 0b_1111_u8;
let m0 = u32x4(!0, 0, !0, 0);
let e0 = 0b_0000_0101_u8;
// Check that the MSB is extracted:
let m = u8x4(0b_1000_0000, 0b_0100_0001, 0b_1100_0001, 0b_1111_1111);
let e = 0b_1101;
// Check usize / isize
let msize: Tx4<usize> = Tx4(usize::MAX, 0, usize::MAX, usize::MAX);
unsafe {
let r: u8 = simd_bitmask(z);
assert_eq!(r, ez);
let r: u8 = simd_bitmask(o);
assert_eq!(r, eo);
let r: u8 = simd_bitmask(m0);
assert_eq!(r, e0);
let r: u8 = simd_bitmask(m);
assert_eq!(r, e);
let r: u8 = simd_bitmask(msize);
assert_eq!(r, e);
}
}
|
