40 lines
1.4 KiB
Rust
40 lines
1.4 KiB
Rust
//! 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,
|
|
}
|