Project roadmap and task tracking for the nfx-cpu library.

Todo

• Extended SIMD detection:
  • SSE3, SSSE3, SSE4.1 detection
    • Add hasSSE3Support(), hasSSSE3Support(), hasSSE41Support()
    • Add unit tests in TESTS_FeatureDetection.cpp
    • Add benchmarks in BM_FeatureDetection.cpp
  • FMA (Fused Multiply-Add) detection
    • Add hasFmaSupport()
    • Add verifyFmaSupport() compile-time helper
    • Add unit tests and benchmarks
  • AVX-512 detection (F, CD, ER, PF, BW, DW, VL, IFMA, VBMI variants)
    • Add granular AVX-512 variant detection functions
    • Add unit tests for each variant
    • Add performance benchmarks
  • ARM NEON detection (cross-platform)
    • Requires ARM CI/CD infrastructure
    • Platform-specific CPUID equivalent
    • Full test coverage on ARM hardware

• Cache topology:
  • CacheInfo struct with L1/L2/L3 sizes, line size
  • cacheInfo() - Complete cache hierarchy
  • Add TESTS_CacheTopology.cpp test suite
  • Add BM_CacheTopology.cpp benchmark suite
  • Sample demonstrating cache-aware optimization

• TSC and frequency:
  • hasTSC(), hasInvariantTSC()
  • readTSC() - Timestamp counter access
  • baseFrequency(), maxFrequency() (MHz)
  • hasTurboBoost() detection
  • Add unit tests for frequency detection
  • Add TSC benchmark for overhead measurement

• Additional x86 instructions:
  • hasBMI() - Bit manipulation instructions (BMI1/BMI2)
  • hasPOPCNT() - Population count
  • hasFMA() - Already in Phase 1 SIMD
  • Add unit tests for each instruction set
  • Add benchmarks comparing with/without hardware support

• ARM extensions:
  • hasSVE() - Scalable Vector Extension
  • hasCRC32() - ARM CRC32 (different from x86)

• Security features:
  • hasAESNI() - Hardware AES encryption
  • hasSHA() - SHA-1/SHA-256 acceleration
  • hasRDRAND(), hasRDSEED() - Hardware RNG
  • hasSGX() - Software Guard Extensions
  • hasSMEP() - Supervisor Mode Execution Prevention
  • Add security feature tests
  • Add benchmarks for crypto hardware acceleration
  • Sample demonstrating AES-NI usage detection

• NUMA topology:
  • numaNodeCount() - NUMA nodes
  • NUMA-aware memory allocation helpers
  • Add NUMA detection tests
  • Add NUMA-aware allocation benchmarks
  • Platform-specific implementation (Windows vs Linux)

• Power management:
  • hasSpeedStep(), hasThermalMonitor()
  • thermalThreshold() - Thermal limits

• Low-level intrinsics:
  • prefetch(addr) - Cache prefetch hint
  • pause() - Spinlock optimization
  • serialize() - Memory fence
  • Add unit tests for intrinsic wrappers
  • Add benchmarks measuring prefetch impact
  • Cross-platform intrinsic abstraction

• Add CpuInfo struct:
  • const CpuInfo& cpuInfo() - Singleton with full CPU capabilities
  • Structured organization: identification, topology, cache, features, frequency
  • Single detection pass, cache everything at once
  • Keep free function API (hasAvx2Support(), etc.) for backward compatibility
  • Hybrid approach: free functions OR struct depending on use case

In Progress

• NIL

Done ✓

v0.1.3 (2025-11-27)

• CMake Packaging - Bug Fixes and Cleanup
  • Remove incorrect runtime dependencies from DEB/RPM packages (header-only library)
  • Remove duplicate WiX tool detection
  • Simplify RPM architecture detection to use uname directly

v0.1.2 (2025-11-25)

• CPU Feature Detection - Performance Optimization
  • Skip runtime CPUID checks when features are compile-time guaranteed
  • Return immediately when __AVX2__, __AVX__, or __SSE4_2__ macros are defined
  • Eliminate unnecessary static lambda initialization in optimized builds
  • Zero overhead detection when compiled with feature flags (-mavx2, etc.)
  • Maintain backward compatibility with runtime detection behavior

v0.1.1 (2025-11-12)

• CPU Feature Detection - OS Support Verification
  • Add OSXSAVE flag check for AVX/AVX2 detection
  • Verify XCR0 register state (XMM/YMM bits) via xgetbv instruction
  • Use inline assembly for GCC/Clang to avoid -mxsave flag dependency
  • Fix MSVC AVX2 detection to use __cpuidex() properly
  • Refactor magic numbers into named constants in internal namespace