On Tue, 7 May 2024 at 14:57, Jeff Law wrote: > > > > On 5/7/24 7:49 AM, Jonathan Wakely wrote: > > Do we want this change for RISC-V, to fix PR113578? > > > > I haven't tested it on RISC-V, only on x86_64-linux (where it doesn't do > > anything). > > > > -- >8 -- > > > > libstdc++-v3/ChangeLog: > > > > PR libstdc++/113578 > > * include/std/ostream (operator<<(basic_ostream&, float)): > > Restore signbit after converting to double. > No strong opinion. One could argue that the existence of a > conditional like that inherently implies the generic code is dependent > on specific processor behavior which probably is unwise. But again, no > strong opinion.
Yes, but I'm not aware of any other processors that lose the signbit like this, so in practice it's always worked fine to cast the float to double.
