[Bug target/97653] Incorrect long double calculation with -mabi=ibmlongdouble

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97653

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yep, that fixes the testcases above, thanks. Retrying the libstdc++ tests ...