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macros.rs
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//! Utility macros.
// Helper struct used to trigger const eval errors when the const generic immediate value `IMM` is
// out of `[MIN-MAX]` range.
pub(crate) struct ValidateConstImm<const IMM: i32, const MIN: i32, const MAX: i32>;
impl<const IMM: i32, const MIN: i32, const MAX: i32> ValidateConstImm<IMM, MIN, MAX> {
pub(crate) const VALID: () = {
let _ = 1 / ((IMM >= MIN && IMM <= MAX) as usize);
};
}
#[allow(unused_macros)]
macro_rules! static_assert_imm1 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 1) - 1 }>::VALID;
};
}
#[allow(unused_macros)]
macro_rules! static_assert_imm2 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 2) - 1 }>::VALID;
};
}
#[allow(unused_macros)]
macro_rules! static_assert_imm3 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 3) - 1 }>::VALID;
};
}
#[allow(unused_macros)]
macro_rules! static_assert_imm4 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 4) - 1 }>::VALID;
};
}
#[allow(unused_macros)]
macro_rules! static_assert_imm5 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 5) - 1 }>::VALID;
};
}
#[allow(unused_macros)]
macro_rules! static_assert_imm6 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 6) - 1 }>::VALID;
};
}
#[allow(unused_macros)]
macro_rules! static_assert_imm8 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 8) - 1 }>::VALID;
};
}
#[allow(unused_macros)]
macro_rules! static_assert_imm16 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 16) - 1 }>::VALID;
};
}
#[allow(unused)]
macro_rules! static_assert {
($imm:ident : $ty:ty where $e:expr) => {
struct Validate<const $imm: $ty>();
impl<const $imm: $ty> Validate<$imm> {
const VALID: () = {
let _ = 1 / ($e as usize);
};
}
let _ = Validate::<$imm>::VALID;
};
}
#[allow(unused)]
macro_rules! constify_imm8 {
($imm8:expr, $expand:ident) => {
#[allow(overflowing_literals)]
match ($imm8) & 0b1111_1111 {
0 => $expand!(0),
1 => $expand!(1),
2 => $expand!(2),
3 => $expand!(3),
4 => $expand!(4),
5 => $expand!(5),
6 => $expand!(6),
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8 => $expand!(8),
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10 => $expand!(10),
11 => $expand!(11),
12 => $expand!(12),
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14 => $expand!(14),
15 => $expand!(15),
16 => $expand!(16),
17 => $expand!(17),
18 => $expand!(18),
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215 => $expand!(215),
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220 => $expand!(220),
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223 => $expand!(223),
224 => $expand!(224),
225 => $expand!(225),
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228 => $expand!(228),
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230 => $expand!(230),
231 => $expand!(231),
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234 => $expand!(234),
235 => $expand!(235),
236 => $expand!(236),
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238 => $expand!(238),
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240 => $expand!(240),
241 => $expand!(241),
242 => $expand!(242),
243 => $expand!(243),
244 => $expand!(244),
245 => $expand!(245),
246 => $expand!(246),
247 => $expand!(247),
248 => $expand!(248),
249 => $expand!(249),
250 => $expand!(250),
251 => $expand!(251),
252 => $expand!(252),
253 => $expand!(253),
254 => $expand!(254),
_ => $expand!(255),
}
};
}
//immediate value: 0:31
#[allow(unused)]
macro_rules! constify_imm5 {
($imm8:expr, $expand:ident) => {
#[allow(overflowing_literals)]
match ($imm8) & 0b1_1111 {
0 => $expand!(0),
1 => $expand!(1),
2 => $expand!(2),
3 => $expand!(3),
4 => $expand!(4),
5 => $expand!(5),
6 => $expand!(6),
7 => $expand!(7),
8 => $expand!(8),
9 => $expand!(9),
10 => $expand!(10),
11 => $expand!(11),
12 => $expand!(12),
13 => $expand!(13),
14 => $expand!(14),
15 => $expand!(15),
16 => $expand!(16),
17 => $expand!(17),
18 => $expand!(18),
19 => $expand!(19),
20 => $expand!(20),
21 => $expand!(21),
22 => $expand!(22),
23 => $expand!(23),
24 => $expand!(24),
25 => $expand!(25),
26 => $expand!(26),
27 => $expand!(27),
28 => $expand!(28),
29 => $expand!(29),
30 => $expand!(30),
_ => $expand!(31),
}
};
}
//immediate value: 0:16
#[allow(unused)]
macro_rules! constify_imm4 {
($imm8:expr, $expand:ident) => {
#[allow(overflowing_literals)]
match ($imm8) & 0b1111 {
0 => $expand!(0),
1 => $expand!(1),
2 => $expand!(2),
3 => $expand!(3),
4 => $expand!(4),
5 => $expand!(5),
6 => $expand!(6),
7 => $expand!(7),
8 => $expand!(8),
9 => $expand!(9),
10 => $expand!(10),
11 => $expand!(11),
12 => $expand!(12),
13 => $expand!(13),
14 => $expand!(14),
_ => $expand!(15),
}
};
}
//immediate value: 0:7
#[allow(unused)]
macro_rules! constify_imm3 {
($imm8:expr, $expand:ident) => {
#[allow(overflowing_literals)]
match ($imm8) & 0b111 {
0 => $expand!(0),
1 => $expand!(1),
2 => $expand!(2),
3 => $expand!(3),
4 => $expand!(4),
5 => $expand!(5),
6 => $expand!(6),
_ => $expand!(7),
}
};
}
#[allow(unused)]
macro_rules! types {
($(
$(#[$doc:meta])*
pub struct $name:ident($($fields:tt)*);
)*) => ($(
$(#[$doc])*
#[derive(Copy, Clone, Debug)]
#[allow(non_camel_case_types)]
#[repr(simd)]
#[allow(clippy::missing_inline_in_public_items)]
pub struct $name($($fields)*);
)*)
}