| //! Utility macros. |
| //! |
| // Helper struct used to trigger const eval errors when the const generic immediate value `imm` is |
| // not a round number. |
| pub(crate) struct ValidateConstRound<const IMM: i32>; |
| impl<const IMM: i32> ValidateConstRound<IMM> { |
| pub(crate) const VALID: () = { |
| assert!( |
| IMM == 4 || IMM == 8 || IMM == 9 || IMM == 10 || IMM == 11, |
| "Invalid IMM value" |
| ); |
| }; |
| } |
| |
| #[allow(unused)] |
| macro_rules! static_assert_rounding { |
| ($imm:ident) => { |
| let _ = $crate::core_arch::x86::macros::ValidateConstRound::<$imm>::VALID; |
| }; |
| } |
| |
| // Helper struct used to trigger const eval errors when the const generic immediate value `imm` is |
| // not a sae number. |
| pub(crate) struct ValidateConstSae<const IMM: i32>; |
| impl<const IMM: i32> ValidateConstSae<IMM> { |
| pub(crate) const VALID: () = { |
| assert!(IMM == 4 || IMM == 8, "Invalid IMM value"); |
| }; |
| } |
| |
| #[allow(unused)] |
| macro_rules! static_assert_sae { |
| ($imm:ident) => { |
| let _ = $crate::core_arch::x86::macros::ValidateConstSae::<$imm>::VALID; |
| }; |
| } |
| |
| // Helper struct used to trigger const eval errors when the const generic immediate value `imm` is |
| // not a mantissas sae number. |
| pub(crate) struct ValidateConstMantissasSae<const IMM: i32>; |
| impl<const IMM: i32> ValidateConstMantissasSae<IMM> { |
| pub(crate) const VALID: () = { |
| assert!(IMM == 4 || IMM == 8 || IMM == 12, "Invalid IMM value"); |
| }; |
| } |
| |
| #[allow(unused)] |
| macro_rules! static_assert_mantissas_sae { |
| ($imm:ident) => { |
| let _ = $crate::core_arch::x86::macros::ValidateConstMantissasSae::<$imm>::VALID; |
| }; |
| } |
| |
| // Helper struct used to trigger const eval errors when the unsigned const generic immediate value |
| // `IMM` is out of `[MIN-MAX]` range. |
| pub(crate) struct ValidateConstImmU32<const IMM: u32, const MIN: u32, const MAX: u32>; |
| impl<const IMM: u32, const MIN: u32, const MAX: u32> ValidateConstImmU32<IMM, MIN, MAX> { |
| pub(crate) const VALID: () = { |
| assert!(IMM >= MIN && IMM <= MAX, "IMM value not in expected range"); |
| }; |
| } |
| |
| #[allow(unused_macros)] |
| macro_rules! static_assert_imm_u8 { |
| ($imm:ident) => { |
| let _ = |
| $crate::core_arch::x86::macros::ValidateConstImmU32::<$imm, 0, { (1 << 8) - 1 }>::VALID; |
| }; |
| } |
| |
| // Helper struct used to trigger const eval errors when the const generic immediate value `SCALE` is |
| // not valid for gather instructions: the only valid scale values are 1, 2, 4 and 8. |
| pub(crate) struct ValidateConstGatherScale<const SCALE: i32>; |
| impl<const SCALE: i32> ValidateConstGatherScale<SCALE> { |
| pub(crate) const VALID: () = { |
| assert!( |
| SCALE == 1 || SCALE == 2 || SCALE == 4 || SCALE == 8, |
| "Invalid SCALE value" |
| ); |
| }; |
| } |
| |
| #[allow(unused)] |
| macro_rules! static_assert_imm8_scale { |
| ($imm:ident) => { |
| let _ = $crate::core_arch::x86::macros::ValidateConstGatherScale::<$imm>::VALID; |
| }; |
| } |
| |
| #[cfg(test)] |
| macro_rules! assert_approx_eq { |
| ($a:expr, $b:expr, $eps:expr) => {{ |
| let (a, b) = (&$a, &$b); |
| assert!( |
| (*a - *b).abs() < $eps, |
| "assertion failed: `(left !== right)` \ |
| (left: `{:?}`, right: `{:?}`, expect diff: `{:?}`, real diff: `{:?}`)", |
| *a, |
| *b, |
| $eps, |
| (*a - *b).abs() |
| ); |
| }}; |
| } |