28 lines
816 B
Rust
28 lines
816 B
Rust
|
//! Run-time feature detection for PowerPC on FreeBSD.
|
||
|
|
|
||
|
|
use crate::detect::{Feature, cache};
|
||
|
|
use super::{auxvec};
|
||
|
|
|
||
|
|
/// Performs run-time feature detection.
|
||
|
|
#[inline]
|
||
|
|
pub fn check_for(x: Feature) -> bool {
|
||
|
|
cache::test(x as u32, detect_features)
|
||
|
|
}
|
||
|
|
|
||
|
|
fn detect_features() -> cache::Initializer {
|
||
|
|
let mut value = cache::Initializer::default();
|
||
|
|
let enable_feature = |value: &mut cache::Initializer, f, enable| {
|
||
|
|
if enable {
|
||
|
|
value.set(f as u32);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
if let Ok(auxv) = auxvec::auxv() {
|
||
|
|
enable_feature(&mut value, Feature::altivec, auxv.hwcap & 0x10000000 != 0);
|
||
|
|
enable_feature(&mut value, Feature::vsx, auxv.hwcap & 0x00000080 != 0);
|
||
|
|
enable_feature(&mut value, Feature::power8, auxv.hwcap2 & 0x80000000 != 0);
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
value
|
||
|
|
}
|