diff options
Diffstat (limited to 'src/tools/rustfmt/tests/source/cfg_if/detect/os/freebsd/arm.rs')
-rw-r--r-- | src/tools/rustfmt/tests/source/cfg_if/detect/os/freebsd/arm.rs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/source/cfg_if/detect/os/freebsd/arm.rs b/src/tools/rustfmt/tests/source/cfg_if/detect/os/freebsd/arm.rs new file mode 100644 index 000000000..e13847dcb --- /dev/null +++ b/src/tools/rustfmt/tests/source/cfg_if/detect/os/freebsd/arm.rs @@ -0,0 +1,27 @@ +//! Run-time feature detection for ARM 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) +} + +/// Try to read the features from the auxiliary vector +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::neon, auxv.hwcap & 0x00001000 != 0); + enable_feature(&mut value, Feature::pmull, auxv.hwcap2 & 0x00000002 != 0); + return value; + } + value +} |