Fields
- sse42: bool
- x64: SSE4.2 (and everything below it).
- avx2: bool
- x64: AVX2, and the operating system saves the vector registers it uses.
- avx512: bool
- x64: AVX-512 F, DQ, BW and VL, and the operating system saves the registers they use.
- neon: bool
- arm64: NEON, which every arm64 processor has.
- sve: bool
- arm64: SVE, reported only where it is cheap to ask (Linux).