x86 long double size definition

In what file would I find the definition for the size of the x86_64 long double type?

Thanks,
Max

For clang, tools/clang/lib/Basic/Targets.cpp, search for LongDoubleWidth.

the size of the x86_64 long double type?

I guess that’s kinda a bad question. Maybe I mean the compiler-internal type that long double maps to?

Thank you!

As a follow up question, if I were to edit those values, would I need to edit the DescriptionString? To be honest, I totally understand what that variable does.