[Bug target/110096] Would be nice if __builtin_ia32_pause had a portable equivalent as it's applicable to ARM

[pdimov at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110096

--- Comment #9 from Peter Dimov <pdimov at gmail dot com> ---
I don't think I want WFE here, based on what I read about it. Putting the core
to sleep seems like something to do in an embedded system where I have full
control of what cores do, not something to do on the application level, in a
portable C++ library.