[Bug 230888] Missing 64 bit atomic functions for i386 (libatomic)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230888

Konstantin Belousov <kib at FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kib at FreeBSD.org

--- Comment #16 from Konstantin Belousov <kib at FreeBSD.org> ---
I can implement emulation of cmpxchg8b where it missed.  It would help at
runtime but not at linktime.

If, as mentioned in the discussion, there is already an implementation of
doubleCAS in compiler_rt, why not put it into libgcc_s.a (*not .so*) ?

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