[Bug c/106117] Use of option -fexcess-precision for operation-by-operation emulation for _Float16 arithmetics.

[rjmccall at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106117

--- Comment #8 from John McCall <rjmccall at gmail dot com> ---
Oh, that's what I get for having two different draft standards open at once. 
Thanks.