+ /* Positive numbers. */
+ ASSERT (!signbit (my_floorf (0.3f)));
+ ASSERT (!signbit (my_floorf (0.7f)));
+ /* Negative numbers. */
+ ASSERT (!!signbit (my_floorf (-0.3f)) == !!signbit (minus_zerof));
+ ASSERT (!!signbit (my_floorf (-0.7f)) == !!signbit (minus_zerof));
+
+ /* [MX] shaded specification in POSIX. */
+
+ /* NaN. */
+ ASSERT (isnanf (floorf (NaNf ())));
+ /* Infinity. */
+ ASSERT (floorf (Infinityf ()) == Infinityf ());
+ ASSERT (floorf (- Infinityf ()) == - Infinityf ());