[Bug libgcc/120691] _Decimal128 arithmetic error under FE_UPWARD

[liuhongt at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120691

--- Comment #16 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #15)
> Release branches are open for *regression* fixes only by default.

Also reverted on releases branches.