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| author | Mateusz MikuĊa <mati865@users.noreply.github.com> | 2022-11-09 01:37:10 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-11-09 00:37:10 +0000 |
| commit | 9f7ded4282ac7362fe5da07d1ee1b8b9646659ab (patch) | |
| tree | 54d7d24e610f47aa8e33a4c5b04cd076e6f8b6a2 /library/stdarch/crates/std_detect/src | |
| parent | c80d9794e062febb147379730272c6eb6dc5c651 (diff) | |
| download | rust-9f7ded4282ac7362fe5da07d1ee1b8b9646659ab.tar.gz rust-9f7ded4282ac7362fe5da07d1ee1b8b9646659ab.zip | |
Fix line endings to use LF (#1350)
Diffstat (limited to 'library/stdarch/crates/std_detect/src')
| -rw-r--r-- | library/stdarch/crates/std_detect/src/detect/os/linux/riscv.rs | 146 |
1 files changed, 73 insertions, 73 deletions
diff --git a/library/stdarch/crates/std_detect/src/detect/os/linux/riscv.rs b/library/stdarch/crates/std_detect/src/detect/os/linux/riscv.rs index 1ec06959a3c..91a85d58e7c 100644 --- a/library/stdarch/crates/std_detect/src/detect/os/linux/riscv.rs +++ b/library/stdarch/crates/std_detect/src/detect/os/linux/riscv.rs @@ -1,73 +1,73 @@ -//! Run-time feature detection for RISC-V on Linux. - -use super::auxvec; -use crate::detect::{bit, cache, Feature}; - -/// Read list of supported features from the auxiliary vector. -pub(crate) fn detect_features() -> cache::Initializer { - let mut value = cache::Initializer::default(); - let enable_feature = |value: &mut cache::Initializer, feature, enable| { - if enable { - value.set(feature as u32); - } - }; - let enable_features = |value: &mut cache::Initializer, feature_slice: &[Feature], enable| { - if enable { - for feature in feature_slice { - value.set(*feature as u32); - } - } - }; - - // The values are part of the platform-specific [asm/hwcap.h][hwcap] - // - // [hwcap]: https://github.com/torvalds/linux/blob/master/arch/riscv/include/asm/hwcap.h - let auxv = auxvec::auxv().expect("read auxvec"); // should not fail on RISC-V platform - enable_feature( - &mut value, - Feature::a, - bit::test(auxv.hwcap, (b'a' - b'a').into()), - ); - enable_feature( - &mut value, - Feature::c, - bit::test(auxv.hwcap, (b'c' - b'a').into()), - ); - enable_features( - &mut value, - &[Feature::d, Feature::f, Feature::zicsr], - bit::test(auxv.hwcap, (b'd' - b'a').into()), - ); - enable_features( - &mut value, - &[Feature::f, Feature::zicsr], - bit::test(auxv.hwcap, (b'f' - b'a').into()), - ); - let has_i = bit::test(auxv.hwcap, (b'i' - b'a').into()); - // If future RV128I is supported, implement with `enable_feature` here - #[cfg(target_pointer_width = "64")] - enable_feature(&mut value, Feature::rv64i, has_i); - #[cfg(target_pointer_width = "32")] - enable_feature(&mut value, Feature::rv32i, has_i); - #[cfg(target_pointer_width = "32")] - enable_feature( - &mut value, - Feature::rv32e, - bit::test(auxv.hwcap, (b'e' - b'a').into()), - ); - enable_feature( - &mut value, - Feature::h, - bit::test(auxv.hwcap, (b'h' - b'a').into()), - ); - enable_feature( - &mut value, - Feature::m, - bit::test(auxv.hwcap, (b'm' - b'a').into()), - ); - // FIXME: Auxvec does not show supervisor feature support, but this mode may be useful - // to detect when Rust is used to write Linux kernel modules. - // These should be more than Auxvec way to detect supervisor features. - - value -} +//! Run-time feature detection for RISC-V on Linux. + +use super::auxvec; +use crate::detect::{bit, cache, Feature}; + +/// Read list of supported features from the auxiliary vector. +pub(crate) fn detect_features() -> cache::Initializer { + let mut value = cache::Initializer::default(); + let enable_feature = |value: &mut cache::Initializer, feature, enable| { + if enable { + value.set(feature as u32); + } + }; + let enable_features = |value: &mut cache::Initializer, feature_slice: &[Feature], enable| { + if enable { + for feature in feature_slice { + value.set(*feature as u32); + } + } + }; + + // The values are part of the platform-specific [asm/hwcap.h][hwcap] + // + // [hwcap]: https://github.com/torvalds/linux/blob/master/arch/riscv/include/asm/hwcap.h + let auxv = auxvec::auxv().expect("read auxvec"); // should not fail on RISC-V platform + enable_feature( + &mut value, + Feature::a, + bit::test(auxv.hwcap, (b'a' - b'a').into()), + ); + enable_feature( + &mut value, + Feature::c, + bit::test(auxv.hwcap, (b'c' - b'a').into()), + ); + enable_features( + &mut value, + &[Feature::d, Feature::f, Feature::zicsr], + bit::test(auxv.hwcap, (b'd' - b'a').into()), + ); + enable_features( + &mut value, + &[Feature::f, Feature::zicsr], + bit::test(auxv.hwcap, (b'f' - b'a').into()), + ); + let has_i = bit::test(auxv.hwcap, (b'i' - b'a').into()); + // If future RV128I is supported, implement with `enable_feature` here + #[cfg(target_pointer_width = "64")] + enable_feature(&mut value, Feature::rv64i, has_i); + #[cfg(target_pointer_width = "32")] + enable_feature(&mut value, Feature::rv32i, has_i); + #[cfg(target_pointer_width = "32")] + enable_feature( + &mut value, + Feature::rv32e, + bit::test(auxv.hwcap, (b'e' - b'a').into()), + ); + enable_feature( + &mut value, + Feature::h, + bit::test(auxv.hwcap, (b'h' - b'a').into()), + ); + enable_feature( + &mut value, + Feature::m, + bit::test(auxv.hwcap, (b'm' - b'a').into()), + ); + // FIXME: Auxvec does not show supervisor feature support, but this mode may be useful + // to detect when Rust is used to write Linux kernel modules. + // These should be more than Auxvec way to detect supervisor features. + + value +} |
