update_flags_nz(value) {
	cpu->ps.N = bit(value, msb-1);
	cpu->ps.Z = value == 0;
}

get_flag(name, match, flag) {
	if (name == match) {
		return flag;
	} else {
		return !flag;
	}
}

jump(addr, fallback, flag) {
	if (flag) {
		return addr;
	} else {
		return fallback;
	}
}

read(addr, size) {
	return read_value(addr, size);
}

write(value, addr, size) {
	write_value(value, addr, size);
}

adc(a, b, carry) {
	sum = a + b + carry;
	update_flags_nz(sum);
	cpu->ps.C = sum < b;
	cpu->ps.V = bit(a^b, msb-1) && bit(a^sum, msb-1);
	return sum;
}

mul(a, b) {
	sum = a * b;
	update_flags_nz(sum);
	cpu->ps.V = bit(a^b, msb-1) && bit(a^sum, msb-1);
	return sum;
}

div(a, b, *rem) {
	sum = a / b;
	*rem = a % b;
	update_flags_nz(sum);
	return sum;
}