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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
// run-pass
// ignore-emscripten FIXME(#45351) hits an LLVM assert
// revisions: mir thir
// [thir]compile-flags: -Zthir-unsafeck
#![feature(repr_simd, platform_intrinsics, concat_idents)]
#![allow(non_camel_case_types)]
#[repr(simd)]
#[derive(Copy, Clone)]
struct i32x4(i32, i32, i32, i32);
#[repr(simd)]
#[derive(Copy, Clone)]
struct u32x4(pub u32, pub u32, pub u32, pub u32);
#[repr(simd)]
#[derive(Copy, Clone)]
struct f32x4(pub f32, pub f32, pub f32, pub f32);
extern "platform-intrinsic" {
fn simd_eq<T, U>(x: T, y: T) -> U;
fn simd_ne<T, U>(x: T, y: T) -> U;
fn simd_lt<T, U>(x: T, y: T) -> U;
fn simd_le<T, U>(x: T, y: T) -> U;
fn simd_gt<T, U>(x: T, y: T) -> U;
fn simd_ge<T, U>(x: T, y: T) -> U;
}
macro_rules! cmp {
($method: ident($lhs: expr, $rhs: expr)) => {{
let lhs = $lhs;
let rhs = $rhs;
let e: u32x4 = concat_idents!(simd_, $method)($lhs, $rhs);
// assume the scalar version is correct/the behaviour we want.
assert!((e.0 != 0) == lhs.0 .$method(&rhs.0));
assert!((e.1 != 0) == lhs.1 .$method(&rhs.1));
assert!((e.2 != 0) == lhs.2 .$method(&rhs.2));
assert!((e.3 != 0) == lhs.3 .$method(&rhs.3));
}}
}
macro_rules! tests {
($($lhs: ident, $rhs: ident;)*) => {{
$(
(|| {
cmp!(eq($lhs, $rhs));
cmp!(ne($lhs, $rhs));
// test both directions
cmp!(lt($lhs, $rhs));
cmp!(lt($rhs, $lhs));
cmp!(le($lhs, $rhs));
cmp!(le($rhs, $lhs));
cmp!(gt($lhs, $rhs));
cmp!(gt($rhs, $lhs));
cmp!(ge($lhs, $rhs));
cmp!(ge($rhs, $lhs));
})();
)*
}}
}
fn main() {
// 13 vs. -100 tests that we get signed vs. unsigned comparisons
// correct (i32: 13 > -100, u32: 13 < -100). let i1 = i32x4(10, -11, 12, 13);
let i1 = i32x4(10, -11, 12, 13);
let i2 = i32x4(5, -5, 20, -100);
let i3 = i32x4(10, -11, 20, -100);
let u1 = u32x4(10, !11+1, 12, 13);
let u2 = u32x4(5, !5+1, 20, !100+1);
let u3 = u32x4(10, !11+1, 20, !100+1);
let f1 = f32x4(10.0, -11.0, 12.0, 13.0);
let f2 = f32x4(5.0, -5.0, 20.0, -100.0);
let f3 = f32x4(10.0, -11.0, 20.0, -100.0);
unsafe {
tests! {
i1, i1;
u1, u1;
f1, f1;
i1, i2;
u1, u2;
f1, f2;
i1, i3;
u1, u3;
f1, f3;
}
}
// NAN comparisons are special:
// -11 (*) 13
// -5 -100 (*)
let f4 = f32x4(f32::NAN, f1.1, f32::NAN, f2.3);
unsafe {
tests! {
f1, f4;
f2, f4;
f4, f4;
}
}
}
|
