On Fri, 12 Mar 2021 at 09:44, Jonathan Wakely <jwakely....@gmail.com> wrote: > > On Fri, 12 Mar 2021 at 09:38, Kito Cheng <kito.ch...@gmail.com> wrote: > > > > Hi Jonathan: > > > > > > C++ also has another proposal for extended floating-point types > > > > (https://wg21.link/p1467), which included half-precision types, so in > > > > my understanding, _Float16 won't be a portable typen between C/C++. > > > > > > Why not just make _Float16 available in C++ as a GCC extension? > > > > Not sure it would introduce any ABI issue or not? Especially the function > > name mangling for _Decimal* types, or maybe we could just implement the > > interchanged floating point type (_FloatN) part to C++ is fine? > > I would forget about the decimal types. I thought you were just > talking about _Float16? > > You will need to decide on a mangling for it in C++, which should be > co-ordinated with other compilers that are likely to support the type. > You could mangle it as "u8_Float16" which is in the namespace reserved > for vendor-extensions
That's documented at http://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling-builtin
