uniform half f;
uniform int i;
uniform bool b;

half4 main() {
    // Covers float -> bool, bool -> float, int -> float
    half x = bool(f) ? half(b) : half(i);

    // Covers int -> bool, bool -> int, float -> int
    int y = bool(i) ? int(b) : int(f);

    return half4(x) * half(y);
}
