AMD Variables in C++ 11

Our organization is moving from pre-standard C++ to C++ 11 (yes we know its 2019) and in the document released about some differences and improvements they are pushing AMD variable types.

Unfortunately I was unable to find anything useful online about these.

What benefit does, say, an AMD_Bool have over bool? (Or any AMD type for that matter)

Is there a reason to change the existing codebase?

Thanks