BitField = bits u8
{
    a: u2,
    b: u2,
    c: u2,
    d: u2,
};

[export] main = fn [cc(c)] () s32
{
    >b: BitField = {
        .a = 3,
        .b = 2,
        .c = 2,
        .d = 3,
    };
    return #extend((b.a - b.d) + (b.b - b.c));
}