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Add shared CPU hardware capability detection in uucore to prevent code duplication across utilities. This provides a unified interface for detecting CPU features (AVX512, AVX2, PCLMUL, SSE2, ASIMD) and respecting GLIBC_TUNABLES environment variable. This unblocks PR #9088 (cksum --debug) and PR #9144 (wc --debug) by providing a common implementation that both utilities can use. Features: - CPU feature detection with caching (singleton pattern) - GLIBC_TUNABLES parsing for hwcaps restrictions - Cross-platform support (x86/x86_64, aarch64) - Comprehensive test coverage - Zero-cost abstractions using std::arch Implementation details: - Uses std::arch feature detection (no external deps for detection) - Adds cfg-if dependency for conditional compilation - Feature-gated behind "hardware" feature flag - Android excluded (no CPUID access in sandboxed environment) Related: #9088, #9144 |
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| bin | ||
| common | ||
| uu | ||
| uucore | ||
| uucore_procs | ||
| lib.rs | ||