[Bug c++/64677] incorrect result with complex division?

[spatel at rotateright dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64677

--- Comment #2 from Sanjay Patel <spatel at rotateright dot com> ---
This is on plain x86-64 with SSE (before the addition of any FMA instructions),
so lack of FMA must be accounted for?

The answers differ in the last digit / ULP. Is there some standard or golden
implementation that will answer which answer is correct?