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Add static_assert_imm{1,5,6} macros

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This commit is contained in:
Lzu Tao
2021-02-28 12:11:20 +07:00
committed by Amanieu d'Antras
parent da451f7195
commit 33937e8ef7
1 changed files with 29 additions and 15 deletions
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44
library/stdarch/crates/core_arch/src/macros.rs
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@@ -1,46 +1,60 @@
//! Utility macros.
// Helper struct used to trigger const eval errors when the const generic immediate value `imm` is
// out of `bits`-bit range.
pub(crate) struct ValidateConstImm<const IMM: i32, const BITS: i32>;
impl<const IMM: i32, const BITS: i32> ValidateConstImm<IMM, BITS> {
// 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 >= 0 && IMM < (1 << BITS)) as usize);
let _ = 1 / ((IMM >= MIN && IMM <= MAX) as usize);
};
}
#[allow(unused)]
#[allow(unused_macros)]
macro_rules! static_assert_imm1 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 1>::VALID;
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 1) - 1 }>::VALID;
};
}
#[allow(unused)]
#[allow(unused_macros)]
macro_rules! static_assert_imm2 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 2>::VALID;
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 2) - 1 }>::VALID;
};
}
#[allow(unused)]
#[allow(unused_macros)]
macro_rules! static_assert_imm3 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 3>::VALID;
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 3) - 1 }>::VALID;
};
}
#[allow(unused)]
#[allow(unused_macros)]
macro_rules! static_assert_imm4 {
($imm:ident) => {
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 4>::VALID;
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 4) - 1 }>::VALID;
};
}
#[allow(unused)]
#[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, 8>::VALID;
let _ = $crate::core_arch::macros::ValidateConstImm::<$imm, 0, { (1 << 8) - 1 }>::VALID;
};
}