assert_equal
assert_equal(t_csqrt(cpackl(0.0, 0.0)), cpackl(0.0, 0.0));
assert_equal(t_csqrt(cpackl(-0.0, 0.0)), cpackl(0.0, 0.0));
assert_equal(t_csqrt(cpackl(0.0, -0.0)), cpackl(0.0, -0.0));
assert_equal(t_csqrt(cpackl(-0.0, -0.0)), cpackl(0.0, -0.0));
assert_equal(t_csqrt(cpackl(-INFINITY, vals[i])),
assert_equal(t_csqrt(cpackl(INFINITY, vals[i])),
assert_equal(t_csqrt(cpackl(vals[i], INFINITY)),
assert_equal(t_csqrt(cpackl(vals[i], -INFINITY)),
assert_equal(t_csqrt(cpackl(NAN, INFINITY)),
assert_equal(t_csqrt(cpackl(NAN, -INFINITY)),
assert_equal(t_csqrt(cpackl(0.0, NAN)), cpackl(NAN, NAN));
assert_equal(t_csqrt(cpackl(-0.0, NAN)), cpackl(NAN, NAN));
assert_equal(t_csqrt(cpackl(42.0, NAN)), cpackl(NAN, NAN));
assert_equal(t_csqrt(cpackl(-42.0, NAN)), cpackl(NAN, NAN));
assert_equal(t_csqrt(cpackl(NAN, 0.0)), cpackl(NAN, NAN));
assert_equal(t_csqrt(cpackl(NAN, -0.0)), cpackl(NAN, NAN));
assert_equal(t_csqrt(cpackl(NAN, 42.0)), cpackl(NAN, NAN));
assert_equal(t_csqrt(cpackl(NAN, -42.0)), cpackl(NAN, NAN));
assert_equal(t_csqrt(cpackl(NAN, NAN)), cpackl(NAN, NAN));