sc_unsigned.h

system C源码 一种替代verilog的语言

    virtual void concat_set(const sc_signed& src, int low_i);
    virtual void concat_set(const sc_unsigned& src, int low_i);
    virtual void concat_set(uint64 src, int low_i);

    // other methods

    void scan( ::std::istream& is = ::std::cin );

protected:
    static sc_core::sc_vpool<sc_unsigned_subref> m_pool;
};



inline
::std::istream&
operator >> ( ::std::istream&, sc_unsigned_subref& );


// ----------------------------------------------------------------------------
//  CLASS : sc_unsigned
//
//  Arbitrary precision unsigned number.
// ----------------------------------------------------------------------------

class sc_unsigned : public sc_value_base
{
    friend class sc_concatref;
    friend class sc_unsigned_bitref_r;
    friend class sc_unsigned_bitref;
    friend class sc_unsigned_subref_r;
    friend class sc_unsigned_subref;
    friend class sc_signed;
    friend class sc_signed_subref;
    friend class sc_signed_subref_r;

  // Needed for types using sc_unsigned.
  typedef bool elemtype;

public:

    // constructors

    explicit sc_unsigned( int nb = sc_length_param().len() );
    sc_unsigned( const sc_unsigned& v );
    sc_unsigned( const sc_signed&   v );
	template<class T>
    explicit sc_unsigned( const sc_generic_base<T>& v );
    explicit sc_unsigned( const sc_bv_base& v );
    explicit sc_unsigned( const sc_lv_base& v );
    explicit sc_unsigned( const sc_int_subref_r& v );
    explicit sc_unsigned( const sc_uint_subref_r& v );
    explicit sc_unsigned( const sc_signed_subref_r& v );
    explicit sc_unsigned( const sc_unsigned_subref_r& v );



    // assignment operators

    const sc_unsigned& operator = (const sc_unsigned&        v);
    const sc_unsigned& operator = (const sc_unsigned_subref_r& a );

    template<class T>
    const sc_unsigned& operator = ( const sc_generic_base<T>& a )
        { a->to_sc_unsigned(*this); return *this; }

    const sc_unsigned& operator = (const sc_signed&          v);
    const sc_unsigned& operator = (const sc_signed_subref_r& a );

    const sc_unsigned& operator = ( const char*               v);
    const sc_unsigned& operator = ( int64                     v);
    const sc_unsigned& operator = ( uint64                    v);
    const sc_unsigned& operator = ( long                      v);
    const sc_unsigned& operator = ( unsigned long             v);

    const sc_unsigned& operator = ( int                       v)
	{ return operator=((long) v); }

    const sc_unsigned& operator = ( unsigned int              v)
	{ return operator=((unsigned long) v); }

    const sc_unsigned& operator = ( double                    v);
    const sc_unsigned& operator = ( const sc_int_base&        v);
    const sc_unsigned& operator = ( const sc_uint_base&       v);

    const sc_unsigned& operator = ( const sc_bv_base& );
    const sc_unsigned& operator = ( const sc_lv_base& );

#ifdef SC_INCLUDE_FX
    const sc_unsigned& operator = ( const sc_fxval& );
    const sc_unsigned& operator = ( const sc_fxval_fast& );
    const sc_unsigned& operator = ( const sc_fxnum& );
    const sc_unsigned& operator = ( const sc_fxnum_fast& );
#endif


    // destructor

    virtual ~sc_unsigned()
	{
#           ifndef SC_MAX_NBITS
	        delete [] digit;
#           endif
	}

    // Concatenation support:

	sc_digit* get_raw() const { return digit; }
    virtual int concat_length(bool* xz_present_p) const
       { if ( xz_present_p ) *xz_present_p = false; return nbits-1; }
    virtual bool concat_get_ctrl( sc_digit* dst_p, int low_i ) const;
    virtual bool concat_get_data( sc_digit* dst_p, int low_i ) const;
    virtual uint64 concat_get_uint64() const;
    virtual void concat_set(int64 src, int low_i);
    virtual void concat_set(const sc_signed& src, int low_i);
    virtual void concat_set(const sc_unsigned& src, int low_i);
    virtual void concat_set(uint64 src, int low_i);

    // Increment operators.

    sc_unsigned& operator ++ ();
    const sc_unsigned operator ++ (int);

    // Decrement operators.

    sc_unsigned& operator -- ();
    const sc_unsigned operator -- (int);


    // bit selection

    inline void check_index( int i ) const
        { if ( (i < 0) || (i >= nbits-1) ) invalid_index(i); }

    void invalid_index( int i ) const;

    sc_unsigned_bitref& operator [] ( int i )
        {
            check_index(i);
            sc_unsigned_bitref* result_p =
	    	sc_unsigned_bitref::m_pool.allocate();
            result_p->initialize( this, i );
            return *result_p;
        }

    const sc_unsigned_bitref_r& operator [] ( int i ) const
        {
            check_index(i);
            sc_unsigned_bitref* result_p =
	        sc_unsigned_bitref::m_pool.allocate();
            result_p->initialize( this, i );
            return *result_p;
        }

    sc_unsigned_bitref& bit( int i )
        {
            check_index(i);
            sc_unsigned_bitref* result_p =
	        sc_unsigned_bitref::m_pool.allocate();
            result_p->initialize( this, i );
            return *result_p;
        }

    const sc_unsigned_bitref_r& bit( int i ) const
        {
            check_index(i);
            sc_unsigned_bitref* result_p =
	        sc_unsigned_bitref::m_pool.allocate();
            result_p->initialize( this, i );
            return *result_p;
        }


    // part selection

    // Subref operators. Help access the range of bits from the ith to
    // jth. These indices have arbitrary precedence with respect to each
    // other, i.e., we can have i <= j or i > j. Note the equivalence
    // between range(i, j) and operator (i, j). Also note that
    // operator (i, i) returns an unsigned number that corresponds to the
    // bit operator [i], so these two forms are not the same.

    inline void check_range( int l, int r ) const
        {
            if ( l < r )
            {
                if ( (l < 0) || (r >= nbits-1) ) invalid_range(l,r);
            }
            else
            {
                if ( (r < 0) || (l >= nbits-1) ) invalid_range(l,r);
            }
        }

    void invalid_range( int l, int r ) const;

    sc_unsigned_subref& range( int i, int j )
        {
            check_range(i,j);
            sc_unsigned_subref* result_p =
	        sc_unsigned_subref::m_pool.allocate();
            result_p->initialize( this, i, j );
            return *result_p;
        }

    const sc_unsigned_subref_r& range( int i, int j ) const
        {
            check_range(i,j);
            sc_unsigned_subref* result_p =
	        sc_unsigned_subref::m_pool.allocate();
            result_p->initialize( this, i, j );
            return *result_p;
        }

    sc_unsigned_subref& operator () ( int i, int j )
        {
            check_range(i,j);
            sc_unsigned_subref* result_p =
	        sc_unsigned_subref::m_pool.allocate();
            result_p->initialize( this, i, j );
            return *result_p;
        }

    const sc_unsigned_subref_r& operator () ( int i, int j ) const
        {
            check_range(i,j);
            sc_unsigned_subref* result_p =
	        sc_unsigned_subref::m_pool.allocate();
            result_p->initialize( this, i, j );
            return *result_p;
        }

    // explicit conversions

    int           to_int() const;
    unsigned int  to_uint() const;
    long          to_long() const;
    unsigned long to_ulong() const;
    int64         to_int64() const;
    uint64        to_uint64() const;
    double        to_double() const;

#ifdef SC_DT_DEPRECATED
    int to_signed() const
	{ return to_int(); }

    unsigned int to_unsigned() const
	{ return to_uint(); }
#endif

    // explicit conversion to character string

    const std::string to_string( sc_numrep numrep = SC_DEC ) const;
    const std::string to_string( sc_numrep numrep, bool w_prefix ) const;

    // Print functions. dump prints the internals of the class.

    void print( ::std::ostream& os = ::std::cout ) const
	{ os << to_string(sc_io_base(os,SC_DEC),sc_io_show_base(os)); }

    void scan( ::std::istream& is = ::std::cin );

    void dump( ::std::ostream& os = ::std::cout ) const;


  // Functions to find various properties.
  int  length() const { return nbits - 1; }  // Bit width.
  bool iszero() const;                       // Is the number zero?
  bool sign() const { return 0; }            // Sign.

    // reduce methods

    bool and_reduce() const;

    bool nand_reduce() const
        { return ( ! and_reduce() ); }

    bool or_reduce() const;

    bool nor_reduce() const
        { return ( ! or_reduce() ); }

    bool xor_reduce() const;

    bool xnor_reduce() const
        { return ( ! xor_reduce() ); }


  // Functions to access individual bits.
  bool test(int i) const;      // Is the ith bit 0 or 1?
  void set(int i);             // Set the ith bit to 1.
  void clear(int i);           // Set the ith bit to 0.
  void set(int i, bool v)      // Set the ith bit to v.
    { if (v) set(i); else clear(i);  }
  void invert(int i)           // Negate the ith bit.
    { if (test(i)) clear(i); else set(i);  }

  // Make the number equal to its mirror image.
  void reverse();

  // Get/set a packed bit representation of the number.
  void get_packed_rep(sc_digit *buf) const;
  void set_packed_rep(sc_digit *buf);

  /*
    The comparison of the old and new semantics are as follows:

    Let s = sc_signed,
        u = sc_unsigned,
        un = { uint64, unsigned long, unsigned int },
        sn = { int64, long, int, char* }, and
        OP = { +, -, *, /, % }.

    Old semantics:                     New semantics:
      u OP u -> u                        u OP u -> u