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use super::cache;
use super::linux;
#[macro_export]
#[unstable(feature = "stdsimd", issue = "0")]
macro_rules! is_powerpc64_feature_detected {
("altivec") => {
cfg!(target_feature = "altivec") ||
$crate::arch::detect::check_for($crate::arch::detect::Feature::altivec)
};
("vsx") => {
cfg!(target_feature = "vsx") ||
$crate::arch::detect::check_for($crate::arch::detect::Feature::vsx)
};
("power8") => {
cfg!(target_feature = "power8") ||
$crate::arch::detect::check_for($crate::arch::detect::Feature::power8)
};
($t:tt) => { compile_error!(concat!("unknown arm target feature: ", $t)) };
}
#[doc(hidden)]
#[allow(non_camel_case_types)]
#[repr(u8)]
pub enum Feature {
altivec,
vsx,
power8,
}
pub fn detect_features() -> cache::Initializer {
let mut value = cache::Initializer::default();
fill_features(&mut value);
return value
}
fn fill_features(value: &mut cache::Initializer) {
let mut enable_feature = |f, enable| {
if enable {
value.set(f as u32);
}
};
if let Ok(auxv) = linux::auxv() {
enable_feature(Feature::altivec, auxv.hwcap & 0x10000000 != 0);
enable_feature(Feature::vsx, auxv.hwcap & 0x00000080 != 0);
enable_feature(Feature::power8, auxv.hwcap & 0x80000000 != 0);
return
}
if let Ok(c) = linux::CpuInfo::new() {
enable_feature(Feature::altivec, c.field("cpu").has("altivec"));
return
}
}