48 lines
1.4 KiB
Rust
48 lines
1.4 KiB
Rust
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//! Run-time feature detection on ARM Aarch32.
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/// Checks if `arm` feature is enabled.
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#[macro_export]
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#[unstable(feature = "stdsimd", issue = "27731")]
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#[allow_internal_unstable(stdsimd_internal, stdsimd)]
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macro_rules! is_arm_feature_detected {
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("neon") => {
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cfg!(target_feature = "neon") || $crate::detect::check_for($crate::detect::Feature::neon)
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};
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("pmull") => {
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cfg!(target_feature = "pmull") || $crate::detect::check_for($crate::detect::Feature::pmull)
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};
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("v7") => {
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compile_error!("\"v7\" feature cannot be detected at run-time")
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};
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("vfp2") => {
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compile_error!("\"vfp2\" feature cannot be detected at run-time")
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};
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("vfp3") => {
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compile_error!("\"vfp3\" feature cannot be detected at run-time")
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};
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("vfp4") => {
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compile_error!("\"vfp4\" feature cannot be detected at run-time")
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};
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($t:tt,) => {
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is_arm_feature_detected!($t);
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};
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($t:tt) => {
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compile_error!(concat!("unknown arm target feature: ", $t))
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};
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}
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/// ARM CPU Feature enum. Each variant denotes a position in a bitset for a
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/// particular feature.
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///
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/// PLEASE: do not use this, it is an implementation detail subject to change.
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#[doc(hidden)]
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#[allow(non_camel_case_types)]
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#[repr(u8)]
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#[unstable(feature = "stdsimd_internal", issue = "0")]
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pub enum Feature {
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/// ARM Advanced SIMD (NEON) - Aarch32
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neon,
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/// Polynomial Multiply
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pmull,
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}
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