On Tue, Jan 25, 2022 at 09:04:05PM +0100, FX wrote: > This is x86_64-linux, with the same source: > > $ gcc-10 v.c -fsignaling-nans && ./a.out > Quiet NaN > nan 7fc00000 > nan 7ff8000000000000 > nan 564e29277fffc000000000000000 > Signaling NaN > nan 7fa00000 > nan 7ff4000000000000 > nan 564e29277fffa000000000000000 >
So the 7fffc and 7fffa signatures are equivalent to what I see on FreeBSD (never seen the 564e2927 string before). Maybe an off-by-one bit in issignaling_fallback.h? -- Steve
