GameBoy\Cbopcode::cbopcode22 PHP Method

    private static function cbopcode22(Core $core)
    {
        $temp_var = $core->memoryRead($core->registersHL);
        $newFCarry = ($temp_var & 0x80) == 0x80;
        $temp_var = ($temp_var << 1 & 0xff) + ($core->FCarry ? 1 : 0);
        $core->FCarry = $newFCarry;
        $core->memoryWrite($core->registersHL, $temp_var);
        $core->FHalfCarry = $core->FSubtract = false;
        $core->FZero = $temp_var == 0x0;
    }