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

[xry111 at gcc dot gnu.org via Gcc-bugs]

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

Xi Ruoyao <xry111 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
           Priority|P3                          |P2
           See Also|                            |https://sourceware.org/bugz
                   |                            |illa/show_bug.cgi?id=15491
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2025-08-24

--- Comment #1 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
Per previous Glibc discussion about nearbyint on x86:

if frndint raises an "invalid" exception for a sNaN operand, that *should* be
added into the restored environment.

Thus we indeed should keep the exception here.