{0x0123456789ab, 0xab8967452301 << 16},
		{0x0123456789abcd, 0xcdab8967452301 << 8},
		{0x0123456789abcdef, 0xefcdab8967452301 << 0},
	} {
		testReverseBytes(t, test.x, test.r)
		testReverseBytes(t, test.r, test.x)
	}
}

func testReverseBytes(t *testing.T, x64, want64 uint64) {
	x16 := uint16(x64)
	got16 := ReverseBytes16(x16)
	want16 := uint16(want64 >> (64 - 16))
	if got16 != want16 {