[c++] Оптимизация кода работы с байтами

Request(cmd, sizeof(cmd));

    unsigned char tmp = {0x01, 0x02, ...};
    for ( it=billTypes.begin() ; it != billTypes.end(); it++ )
    {
        unsigned int mod = *it % 8;
        if(*it <= 7)
        {
            cmd[3] = cmd[3] + tmp[mod];
        }
        else if(*it <= 15)
        {
            cmd[2] = cmd[2] + tmp[mod + 8];
        }
        else if(*it <= 23)
        {
            cmd[1] = cmd[1] + tmp[mod + 16];
        }
        else
        {
            printf("Unknown bill type");
            return;
        }
    }

    for ( it=billTypes.begin() ; it != billTypes.end(); it++ )
    {
        unsigned char tmp  = 1 << (*it & 7);
        if(*it <= 7)
        {
            cmd[3] = cmd[3] + tmp;
        }
        else if(*it <= 15)
        {
            cmd[2] = cmd[2] + tmp;
        }
        else if(*it <= 23)
        {
            cmd[1] = cmd[1] + tmp;
        }
        else
        {
            printf("Unknown bill type");
            return;
        }
    }

    for ( it=billTypes.begin() ; it != billTypes.end(); it++ )
    {
        unsigned char tmp  = 1 << (*it & 7);
        if (it > 23)
        {
            printf ("Unknown bill type");
            return;
        }
        *it <= 7 ? (cmd[3] += tmp) : (*it <= 15 ? cmd[2] += tmp : cmd[1] += tmp);
    }

        cmd[*it <= 7 ? 3 : (*it <= 15 ? 2 : 1)] += tmp;
[[/code]]

class BinaryExpr : public Expr {
public:
	enum Op {
		Add,
		Sub,
		Mul,
		Div,
		Mod,
		Shl,
		Shr,
		Lt,   // <-- сюда заходи, сюда сука
		Gt,
		Le,
		Ge,
		Equal,
		NotEqual,
		BitAnd,
		BitXor,
		BitOr,
		LogicalAnd,
		LogicalOr,
		Comma,
	};

	BinaryExpr(Op o, Expr *a, Expr *b, SourcePos p);
    
	llvm::Value *GetValue(FunctionEmitContext *ctx) const;
        const Type *GetType() const;
        void Print() const;
	
        Expr *Optimize();
        Expr *TypeCheck();
        int EstimateCost() const;

        const Op op;
        Expr *arg0, *arg1;
};

cmd[3 - (*it >> 3)] += 1 << (*it & 7);