You study autovectorizers, then you enable autovectorization warning flags, and carefully read your compilers output. If the compiler says autovectorization fa

You study autovectorizers, then you enable autovectorization warning flags, and carefully read your compilers output. If the compiler says autovectorization failed, you rewrite the code until the autovectorizer works. https://docs.microsoft.com/en-us/cpp/build/reference/qvec-report-auto-vectorizer-reporting-level?view=msvc-170 https://docs.microsoft.com/en-us/cpp/build/reference/qvec-re...