C++23 deprecation warnings for float_denorm_style and denorm_present

Building as C++23 with Clang, I get the following 3 warnings in my app from eigen headers:

BFloat16.h:142:37 'float_denorm_style' is deprecated
BFloat16.h:142:74 'denorm_present' is deprecated
BFloat16.h:189:28 'float_denorm_style' is deprecated

I'm not really sure what those are or how to replace them...