Here (and in a few SO questions) I see that C++ doesn't support something like lock-free std::atomic<double> and can't yet support something like atomic AVX/SSE vector because it's CPU-dependent (though nowadays of CPUs I know, ARM, AArch64 and x86_64 have vectors).
But is there assembly-level support for atomic operations on doubles or vectors in x86_64? If so, which operations are supported (like load, store, add, subtract, multiply maybe)? Which operations does MSVC++2017 implement lock-free in atomic<double>?