intel intrinsics

https://www.intel.com/content/www/us/en/docs/cpp-compiler/developer-guide-reference/2021-9/intrinsics-for-intel-advanced-vector-extensions.html

inlining failed in call to always_inline

https://stackoverflow.com/questions/44962849/inlining-failed-in-call-to-always-inline-m256d-mm256-broadcast-sdconst-doub
-march=native