{
/* Zero. */
ASSERT (roundf (0.0f) == 0.0f);
+ ASSERT (!signbit (roundf (0.0f)));
ASSERT (roundf (minus_zerof) == 0.0f);
+ ASSERT (!!signbit (minus_zerof) == !!signbit (roundf (minus_zerof)));
/* Positive numbers. */
ASSERT (roundf (0.3f) == 0.0f);
ASSERT (roundf (0.5f) == 1.0f);