[Bug target/113578] Incorrect sign printed for -nan on RISC-V

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113578

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Joseph S. Myers from comment #2)
> If a conversion from float to double (for passing in variable arguments)
> occurs at runtime on RISC-V, that will produce a positive-signed NaN (that's
> what the RISC-V floating-point instructions do). Cf.
> https://sourceware.org/bugzilla/show_bug.cgi?id=29501 (for strfrom
> functions).

This seems to happen on Apple M1 chips too.