nexttowardf
float nexttowardf(float, long double);
stest(nexttowardf, 0x1p-149f, f);
testf(nexttowardf(1.0, 1.0 + ldbl_eps), 1.0 + FLT_EPSILON, 0);
testf(idf(nexttowardf(FLT_MAX, FLT_MAX * 2.0)), INFINITY, ex_over);
testf(idf(nexttowardf(INFINITY, FLT_MAX * 2.0)), FLT_MAX, 0);
float (nexttowardf)(float x, long double y) { n_float++; }