core/stdarch/crates/core_arch/src/
macros.rs1#[allow(unused)]
4macro_rules! static_assert {
5 ($e:expr) => {
6 const {
7 assert!($e);
8 }
9 };
10 ($e:expr, $msg:expr) => {
11 const {
12 assert!($e, $msg);
13 }
14 };
15}
16
17#[allow(unused_macros)]
18macro_rules! static_assert_uimm_bits {
19 ($imm:ident, $bits:expr) => {
20 #[allow(unused_comparisons)]
22 {
23 static_assert!(
24 0 <= $imm && $imm < (1 << $bits),
25 concat!(
26 stringify!($imm),
27 " doesn't fit in ",
28 stringify!($bits),
29 " bits",
30 )
31 )
32 }
33 };
34}
35
36#[allow(unused_macros)]
37macro_rules! static_assert_simm_bits {
38 ($imm:ident, $bits:expr) => {
39 static_assert!(
40 (-1 << ($bits - 1)) - 1 <= $imm && $imm < (1 << ($bits - 1)),
41 concat!(
42 stringify!($imm),
43 " doesn't fit in ",
44 stringify!($bits),
45 " bits",
46 )
47 )
48 };
49}
50
51#[allow(unused)]
52macro_rules! types {
53 (
54 #![$stability_first:meta]
55 $(
56 #![$stability_more:meta]
57 )*
58
59 $(
60 $(#[$doc:meta])*
61 $(stability: [$stability_already: meta])*
62 pub struct $name:ident($len:literal x $v:vis $elem_type:ty);
63 )*
64 ) => (types! {
65 $(
66 #![$stability_more]
67 )*
68
69 $(
70 $(#[$doc])*
71 $(stability: [$stability_already])*
72 stability: [$stability_first]
73 pub struct $name($len x $v $elem_type);
74 )*
75 });
76
77 (
78 $(
79 $(#[$doc:meta])*
80 $(stability: [$stability: meta])+
81 pub struct $name:ident($len:literal x $v:vis $elem_type:ty);
82 )*
83 ) => ($(
84 $(#[$doc])*
85 $(#[$stability])+
86 #[derive(Copy, Clone)]
87 #[allow(non_camel_case_types)]
88 #[repr(simd)]
89 #[allow(clippy::missing_inline_in_public_items)]
90 pub struct $name($v [$elem_type; $len]);
91
92 impl $name {
93 #[inline(always)]
96 $v fn splat(value: $elem_type) -> $name {
97 #[derive(Copy, Clone)]
98 #[repr(simd)]
99 struct JustOne([$elem_type; 1]);
100 let one = JustOne([value]);
101 unsafe { simd_shuffle!(one, one, [0; $len]) }
104 }
105 }
106
107 $(#[$stability])+
108 impl crate::fmt::Debug for $name {
109 #[inline]
110 fn fmt(&self, f: &mut crate::fmt::Formatter<'_>) -> crate::fmt::Result {
111 crate::core_arch::simd::debug_simd_finish(f, stringify!($name), self.0)
112 }
113 }
114 )*);
115}
116
117#[allow(unused)]
118#[repr(simd)]
119pub(crate) struct SimdShuffleIdx<const LEN: usize>(pub(crate) [u32; LEN]);
120
121#[allow(unused)]
122macro_rules! simd_shuffle {
123 ($x:expr, $y:expr, $idx:expr $(,)?) => {{
124 $crate::intrinsics::simd::simd_shuffle(
125 $x,
126 $y,
127 const { $crate::core_arch::macros::SimdShuffleIdx($idx) },
128 )
129 }};
130}
131
132#[allow(unused)]
133macro_rules! simd_insert {
134 ($x:expr, $idx:expr, $val:expr $(,)?) => {{
135 $crate::intrinsics::simd::simd_insert($x, const { $idx }, $val)
136 }};
137}
138
139#[allow(unused)]
140macro_rules! simd_extract {
141 ($x:expr, $idx:expr $(,)?) => {{
142 $crate::intrinsics::simd::simd_extract($x, const { $idx })
143 }};
144 ($x:expr, $idx:expr, $ty:ty $(,)?) => {{
145 $crate::intrinsics::simd::simd_extract::<_, $ty>($x, const { $idx })
146 }};
147}