fix: adjust NaN when rounding floats

Author: ruancomelli

compiler/rustc_const_eval/src/interpret/intrinsics.rs

@@ -1009,6 +1009,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
     {
         let x: F = self.read_scalar(&args[0])?.to_float()?;
         let res = x.round_to_integral(mode).value;
+        let res = self.adjust_nan(res, &[x]);
         self.write_scalar(res, dest)?;
         interp_ok(())
     }