[Bug target/121652] [15/16 Regression] round builtin does not raise FE_INVALID for signaling NaN

[andrew at sifive dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121652

--- Comment #7 from Andrew Waterman <andrew at sifive dot com> ---
Ah, thanks.  Regardless, it seems the `feq` scheme is the preferable one.