| //! Run-time feature detection for MIPS on Linux. |
| |
| use super::auxvec; |
| use crate::detect::{bit, cache, Feature}; |
| |
| /// Try to read the features from the auxiliary vector, and if that fails, try |
| /// to read them from `/proc/cpuinfo`. |
| pub(crate) 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); |
| } |
| }; |
| |
| // The values are part of the platform-specific [asm/hwcap.h][hwcap] |
| // |
| // [hwcap]: https://github.com/torvalds/linux/blob/master/arch/arm64/include/uapi/asm/hwcap.h |
| if let Ok(auxv) = auxvec::auxv() { |
| enable_feature(&mut value, Feature::msa, bit::test(auxv.hwcap, 1)); |
| return value; |
| } |
| // TODO: fall back via `cpuinfo`. |
| value |
| } |
