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

[aurelien at aurel32 dot net via Gcc-bugs]

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

--- Comment #27 from Aurelien Jarno <aurelien at aurel32 dot net> ---
(In reply to Jeffrey A. Law from comment #26)
> Cherry-picked to the gcc-15 branch.  Closing as fixed.

Thanks Jeff!