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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /library/stdarch/crates/std_detect/src/detect/os/windows/aarch64.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | library/stdarch/crates/std_detect/src/detect/os/windows/aarch64.rs | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/library/stdarch/crates/std_detect/src/detect/os/windows/aarch64.rs b/library/stdarch/crates/std_detect/src/detect/os/windows/aarch64.rs new file mode 100644 index 000000000..051ad6d1b --- /dev/null +++ b/library/stdarch/crates/std_detect/src/detect/os/windows/aarch64.rs @@ -0,0 +1,59 @@ +//! Run-time feature detection for Aarch64 on Windows. + +use crate::detect::{cache, Feature}; + +/// Try to read the features using IsProcessorFeaturePresent. +pub(crate) fn detect_features() -> cache::Initializer { + type DWORD = u32; + type BOOL = i32; + + const FALSE: BOOL = 0; + // The following Microsoft documents isn't updated for aarch64. + // https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-isprocessorfeaturepresent + // These are defined in winnt.h of Windows SDK + const PF_ARM_NEON_INSTRUCTIONS_AVAILABLE: u32 = 19; + const PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE: u32 = 30; + const PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE: u32 = 31; + + extern "system" { + pub fn IsProcessorFeaturePresent(ProcessorFeature: DWORD) -> BOOL; + } + + let mut value = cache::Initializer::default(); + { + let mut enable_feature = |f, enable| { + if enable { + value.set(f as u32); + } + }; + + // Some features such Feature::fp may be supported on current CPU, + // but no way to detect it by OS API. + // Also, we require unsafe block for the extern "system" calls. + unsafe { + enable_feature( + Feature::asimd, + IsProcessorFeaturePresent(PF_ARM_NEON_INSTRUCTIONS_AVAILABLE) != FALSE, + ); + enable_feature( + Feature::crc, + IsProcessorFeaturePresent(PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE) != FALSE, + ); + // PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE means aes, sha1, sha2 and + // pmull support + enable_feature( + Feature::aes, + IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) != FALSE, + ); + enable_feature( + Feature::pmull, + IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) != FALSE, + ); + enable_feature( + Feature::sha2, + IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) != FALSE, + ); + } + } + value +} |