https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85518
--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- You still need some of the built-in functions for use with __float128 in C++ when that has a different format from long double. It's the built-in functions for types with the same format as float / double / long double for which things are less clear.
