https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70465
--- Comment #4 from Jeffrey A. Law <law at redhat dot com> --- No objections to deferring this to gcc-7. Not surprisingly, my response when this issue was raised on Red Hat's internal IRC was the same -- nobody cares about x87 math anymore ;-) IMHO it's really just a codesize issue anyway given how fxch is implemented on modern processors.
