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