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//! Aarch64 run-time features.
/// Checks if `aarch64` feature is enabled.
#[macro_export]
#[unstable(feature = "stdsimd", issue = "27731")]
#[allow_internal_unstable(stdsimd_internal, stdsimd)]
macro_rules! is_aarch64_feature_detected {
("neon") => {
// FIXME: this should be removed once we rename Aarch64 neon to asimd
cfg!(target_feature = "neon") || $crate::detect::check_for($crate::detect::Feature::asimd)
};
("asimd") => {
cfg!(target_feature = "neon") || $crate::detect::check_for($crate::detect::Feature::asimd)
};
("pmull") => {
cfg!(target_feature = "pmull") || $crate::detect::check_for($crate::detect::Feature::pmull)
};
("fp") => {
cfg!(target_feature = "fp") || $crate::detect::check_for($crate::detect::Feature::fp)
};
("fp16") => {
cfg!(target_feature = "fp16") || $crate::detect::check_for($crate::detect::Feature::fp16)
};
("sve") => {
cfg!(target_feature = "sve") || $crate::detect::check_for($crate::detect::Feature::sve)
};
("crc") => {
cfg!(target_feature = "crc") || $crate::detect::check_for($crate::detect::Feature::crc)
};
("crypto") => {
cfg!(target_feature = "crypto")
|| $crate::detect::check_for($crate::detect::Feature::crypto)
};
("lse") => {
cfg!(target_feature = "lse") || $crate::detect::check_for($crate::detect::Feature::lse)
};
("rdm") => {
cfg!(target_feature = "rdm") || $crate::detect::check_for($crate::detect::Feature::rdm)
};
("rcpc") => {
cfg!(target_feature = "rcpc") || $crate::detect::check_for($crate::detect::Feature::rcpc)
};
("dotprod") => {
cfg!(target_feature = "dotprod")
|| $crate::detect::check_for($crate::detect::Feature::dotprod)
};
("ras") => {
compile_error!("\"ras\" feature cannot be detected at run-time")
};
("v8.1a") => {
compile_error!("\"v8.1a\" feature cannot be detected at run-time")
};
("v8.2a") => {
compile_error!("\"v8.2a\" feature cannot be detected at run-time")
};
("v8.3a") => {
compile_error!("\"v8.3a\" feature cannot be detected at run-time")
};
($t:tt,) => {
is_aarch64_feature_detected!($t);
};
($t:tt) => {
compile_error!(concat!("unknown aarch64 target feature: ", $t))
};
}
/// ARM Aarch64 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 (ASIMD)
asimd,
/// Polynomial Multiply
pmull,
/// Floating point support
fp,
/// Half-float support.
fp16,
/// Scalable Vector Extension (SVE)
sve,
/// CRC32 (Cyclic Redundancy Check)
crc,
/// Crypto: AES + PMULL + SHA1 + SHA2
crypto,
/// Atomics (Large System Extension)
lse,
/// Rounding Double Multiply (ASIMDRDM)
rdm,
/// Release consistent Processor consistent (RcPc)
rcpc,
/// Vector Dot-Product (ASIMDDP)
dotprod,
}
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