sc_fxnum.h

system C源码 一种替代verilog的语言

#undef DECL_ASN_OP_A


    // relational operators

#define DECL_REL_OP_T(op,tp)                                                  \
    friend bool operator op ( const sc_fxnum_fast_subref&, tp );              \
    friend bool operator op ( tp, const sc_fxnum_fast_subref& );

#define DECL_REL_OP(op)                                                       \
    friend bool operator op ( const sc_fxnum_fast_subref&,                    \
			      const sc_fxnum_fast_subref& );                  \
    friend bool operator op ( const sc_fxnum_fast_subref&,                    \
			      const sc_fxnum_subref& );                       \
    DECL_REL_OP_T(op,const sc_bv_base&)                                       \
    DECL_REL_OP_T(op,const sc_lv_base&)                                       \
    DECL_REL_OP_T(op,const char*)                                             \
    DECL_REL_OP_T(op,const bool*)                                             \
    DECL_REL_OP_T(op,const sc_signed&)                                        \
    DECL_REL_OP_T(op,const sc_unsigned&)                                      \
    DECL_REL_OP_T(op,int)                                                     \
    DECL_REL_OP_T(op,unsigned int)                                            \
    DECL_REL_OP_T(op,long)                                                    \
    DECL_REL_OP_T(op,unsigned long)

    DECL_REL_OP(==)
    DECL_REL_OP(!=)

#undef DECL_REL_OP_T
#undef DECL_REL_OP


    // reduce functions

    bool and_reduce() const;
    bool nand_reduce() const;
    bool or_reduce() const;
    bool nor_reduce() const;
    bool xor_reduce() const;
    bool xnor_reduce() const;


    // query parameter

    int length() const;


    // 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;

#ifdef SC_DT_DEPRECATED
    int           to_signed() const;
    unsigned int  to_unsigned() const;
#endif

    const std::string to_string() const;
    const std::string to_string( sc_numrep ) const;
    const std::string to_string( sc_numrep, bool ) const;


    // implicit conversion

    operator sc_bv_base() const;


    // print or dump content

    void print( ::std::ostream& = ::std::cout ) const;
    void scan( ::std::istream& = ::std::cin );
    void dump( ::std::ostream& = ::std::cout ) const;

private:

    sc_fxnum_fast& m_num;
    int            m_from;
    int            m_to;

    sc_bv_base& m_bv;

private:

    // disabled
    sc_fxnum_fast_subref();
};


// ----------------------------------------------------------------------------
//  CLASS : sc_fxnum
//
//  Base class for the fixed-point types; arbitrary precision.
// ----------------------------------------------------------------------------

class sc_fxnum
{
    friend class sc_fxval;

    friend class sc_fxnum_bitref;
    friend class sc_fxnum_subref;
    friend class sc_fxnum_fast_bitref;
    friend class sc_fxnum_fast_subref;

    friend class sc_core::vcd_sc_fxnum_trace;
    friend class sc_core::wif_sc_fxnum_trace;

protected:

    sc_fxnum_observer* observer() const;


    void cast();


    // constructors

    sc_fxnum( const sc_fxtype_params&,
	      sc_enc,
	      const sc_fxcast_switch&,
	      sc_fxnum_observer* );

#define DECL_CTOR_T(tp)                                                       \
    sc_fxnum( tp,                                                             \
	      const sc_fxtype_params&,                                        \
	      sc_enc,                                                         \
	      const sc_fxcast_switch&,                                        \
	      sc_fxnum_observer* );

    DECL_CTOR_T(int)
    DECL_CTOR_T(unsigned int)
    DECL_CTOR_T(long)
    DECL_CTOR_T(unsigned long)
    DECL_CTOR_T(double)
    DECL_CTOR_T(const char*)
    DECL_CTOR_T(const sc_fxval&)
    DECL_CTOR_T(const sc_fxval_fast&)
    DECL_CTOR_T(const sc_fxnum&)
    DECL_CTOR_T(const sc_fxnum_fast&)
#ifndef SC_FX_EXCLUDE_OTHER
    DECL_CTOR_T(int64)
    DECL_CTOR_T(uint64)
    DECL_CTOR_T(const sc_int_base&)
    DECL_CTOR_T(const sc_uint_base&)
    DECL_CTOR_T(const sc_signed&)
    DECL_CTOR_T(const sc_unsigned&)
#endif

#undef DECL_CTOR_T

    ~sc_fxnum();


    // internal use only;
    const scfx_rep* get_rep() const;

public:

    // unary operators

    const sc_fxval operator - () const;
    const sc_fxval operator + () const;


    // unary functions

    friend void neg( sc_fxval&, const sc_fxnum& );
    friend void neg( sc_fxnum&, const sc_fxnum& );


    // binary operators

#define DECL_BIN_OP_T(op,tp)                                                  \
    friend const sc_fxval operator op ( const sc_fxnum&, tp );                \
    friend const sc_fxval operator op ( tp, const sc_fxnum& );

#ifndef SC_FX_EXCLUDE_OTHER
#define DECL_BIN_OP_OTHER(op)                                                 \
    DECL_BIN_OP_T(op,int64)                                                   \
    DECL_BIN_OP_T(op,uint64)                                                  \
    DECL_BIN_OP_T(op,const sc_int_base&)                                      \
    DECL_BIN_OP_T(op,const sc_uint_base&)                                     \
    DECL_BIN_OP_T(op,const sc_signed&)                                        \
    DECL_BIN_OP_T(op,const sc_unsigned&)
#else
#define DECL_BIN_OP_OTHER(op)
#endif

#define DECL_BIN_OP(op,dummy)                                                 \
    friend const sc_fxval operator op ( const sc_fxnum&, const sc_fxnum& );   \
    DECL_BIN_OP_T(op,int)                                                     \
    DECL_BIN_OP_T(op,unsigned int)                                            \
    DECL_BIN_OP_T(op,long)                                                    \
    DECL_BIN_OP_T(op,unsigned long)                                           \
    DECL_BIN_OP_T(op,double)                                                  \
    DECL_BIN_OP_T(op,const char*)                                             \
    DECL_BIN_OP_T(op,const sc_fxval&)                                         \
    DECL_BIN_OP_T(op,const sc_fxval_fast&)                                    \
    DECL_BIN_OP_T(op,const sc_fxnum_fast&)                                    \
    DECL_BIN_OP_OTHER(op)

    DECL_BIN_OP(*,mult)
    DECL_BIN_OP(+,add)
    DECL_BIN_OP(-,sub)
// don't use macros
//    DECL_BIN_OP(/,div)
    friend const sc_fxval operator / ( const sc_fxnum&, const sc_fxnum& );
    DECL_BIN_OP_T(/,int)
    DECL_BIN_OP_T(/,unsigned int)
    DECL_BIN_OP_T(/,long)
    DECL_BIN_OP_T(/,unsigned long)
    DECL_BIN_OP_T(/,double)
    DECL_BIN_OP_T(/,const char*)
    DECL_BIN_OP_T(/,const sc_fxval&)
    DECL_BIN_OP_T(/,const sc_fxval_fast&)
    DECL_BIN_OP_T(/,const sc_fxnum_fast&)
//    DECL_BIN_OP_OTHER(op)
#ifndef SC_FX_EXCLUDE_OTHER
    DECL_BIN_OP_T(/,int64)
    DECL_BIN_OP_T(/,uint64)
    DECL_BIN_OP_T(/,const sc_int_base&)
    DECL_BIN_OP_T(/,const sc_uint_base&)
    DECL_BIN_OP_T(/,const sc_signed&)
    DECL_BIN_OP_T(/,const sc_unsigned&)
#endif

#undef DECL_BIN_OP_T
#undef DECL_BIN_OP_OTHER
#undef DECL_BIN_OP

    friend const sc_fxval operator << ( const sc_fxnum&, int );
    friend const sc_fxval operator >> ( const sc_fxnum&, int );


    // binary functions

#define DECL_BIN_FNC_T(fnc,tp)                                                \
    friend void fnc ( sc_fxval&, const sc_fxnum&, tp );                       \
    friend void fnc ( sc_fxval&, tp, const sc_fxnum& );                       \
    friend void fnc ( sc_fxnum&, const sc_fxnum&, tp );                       \
    friend void fnc ( sc_fxnum&, tp, const sc_fxnum& );

#ifndef SC_FX_EXCLUDE_OTHER
#define DECL_BIN_FNC_OTHER(fnc)                                               \
    DECL_BIN_FNC_T(fnc,int64)                                                 \
    DECL_BIN_FNC_T(fnc,uint64)                                                \
    DECL_BIN_FNC_T(fnc,const sc_int_base&)                                    \
    DECL_BIN_FNC_T(fnc,const sc_uint_base&)                                   \
    DECL_BIN_FNC_T(fnc,const sc_signed&)                                      \
    DECL_BIN_FNC_T(fnc,const sc_unsigned&)
#else
#define DECL_BIN_FNC_OTHER(fnc)
#endif

#define DECL_BIN_FNC(fnc)                                                     \
    friend void fnc ( sc_fxval&, const sc_fxnum&, const sc_fxnum& );          \
    friend void fnc ( sc_fxnum&, const sc_fxnum&, const sc_fxnum& );          \
    DECL_BIN_FNC_T(fnc,int)                                                   \
    DECL_BIN_FNC_T(fnc,unsigned int)                                          \
    DECL_BIN_FNC_T(fnc,long)                                                  \
    DECL_BIN_FNC_T(fnc,unsigned long)                                         \
    DECL_BIN_FNC_T(fnc,double)                                                \
    DECL_BIN_FNC_T(fnc,const char*)                                           \
    DECL_BIN_FNC_T(fnc,const sc_fxval&)                                       \
    DECL_BIN_FNC_T(fnc,const sc_fxval_fast&)                                  \
    DECL_BIN_FNC_T(fnc,const sc_fxnum_fast&)                                  \
    DECL_BIN_FNC_OTHER(fnc)

    DECL_BIN_FNC(mult)
    DECL_BIN_FNC(div)
    DECL_BIN_FNC(add)
    DECL_BIN_FNC(sub)

#undef DECL_BIN_FNC_T
#undef DECL_BIN_FNC_OTHER
#undef DECL_BIN_FNC

    friend void lshift( sc_fxval&, const sc_fxnum&, int );
    friend void rshift( sc_fxval&, const sc_fxnum&, int );
    friend void lshift( sc_fxnum&, const sc_fxnum&, int );
    friend void rshift( sc_fxnum&, const sc_fxnum&, int );


    // relational (including equality) operators

#define DECL_REL_OP_T(op,tp)                                                  \
    friend bool operator op ( const sc_fxnum&, tp );                          \
    friend bool operator op ( tp, const sc_fxnum& );

#ifndef SC_FX_EXCLUDE_OTHER
#define DECL_REL_OP_OTHER(op)                                                 \
    DECL_REL_OP_T(op,int64)                                                   \
    DECL_REL_OP_T(op,uint64)                                                  \
    DECL_REL_OP_T(op,const sc_int_base&)                                      \
    DECL_REL_OP_T(op,const sc_uint_base&)                                     \
    DECL_REL_OP_T(op,const sc_signed&)                                        \
    DECL_REL_OP_T(op,const sc_unsigned&)
#else
#define DECL_REL_OP_OTHER(op)
#endif

#define DECL_REL_OP(op)                                                       \
    friend bool operator op ( const sc_fxnum&, const sc_fxnum& );             \
    DECL_REL_OP_T(op,int)                                                     \
    DECL_REL_OP_T(op,unsigned int)                                            \
    DECL_REL_OP_T(op,long)                                                    \
    DECL_REL_OP_T(op,unsigned long)                                           \
    DECL_REL_OP_T(op,double)                                                  \
    DECL_REL_OP_T(op,const char*)                                             \
    DECL_REL_OP_T(op,const sc_fxval&)                                         \
    DECL_REL_OP_T(op,const sc_fxval_fast&)                                    \
    DECL_REL_OP_T(op,const sc_fxnum_fast&)                                    \
    DECL_REL_OP_OTHER(op)

    DECL_REL_OP(<)
    DECL_REL_OP(<=)
    DECL_REL_OP(>)
    DECL_REL_OP(>=)
    DECL_REL_OP(==)
    DECL_REL_OP(!=)

#undef DECL_REL_OP_T
#undef DECL_REL_OP_OTHER
#undef DECL_REL_OP


    // assignment operators

#define DECL_ASN_OP_T(op,tp)                                                  \
    sc_fxnum& operator op( tp );

#ifndef SC_FX_EXCLUDE_OTHER
#define DECL_ASN_OP_OTHER(op)                                                 \
    DECL_ASN_OP_T(op,int64)                                                   \
    DECL_ASN_OP_T(op,uint64)                                                  \
    DECL_ASN_OP_T(op,const sc_int_base&)                                      \
    DECL_ASN_OP_T(op,const sc_uint_base&)                                     \
    DECL_ASN_OP_T(op,const sc_signed&)                                        \
    DECL_ASN_OP_T(op,const sc_unsigned&)
#else
#define DECL_ASN_OP_OTHER(op)
#endif

#define DECL_ASN_OP(op)                                                       \
    DECL_ASN_OP_T(op,int)                                                     \
    DECL_ASN_OP_T(op,unsigned int)                                            \
    DECL_ASN_OP_T(op,long)                                                    \
    DECL_ASN_OP_T(op,unsigned long)                                           \
    DECL_ASN_OP_T(op,double)                                                  \
    DECL_ASN_OP_T(op,const char*)                                             \
    DECL_ASN_OP_T(op,const sc_fxval&)                                         \
    DECL_ASN_OP_T(op,const sc_fxval_fast&)                                    \
    DECL_ASN_OP_T(op,const sc_fxnum&)                                         \
    DECL_ASN_OP_T(op,const sc_fxnum_fast&)                                    \
    DECL_ASN_OP_OTHER(op)

    DECL_ASN_OP(=)

    DECL_ASN_OP(*=)
    DECL_ASN_OP(/=)
    DECL_ASN_OP(+=)
    DECL_ASN_OP(-=)

    DECL_ASN_OP_T(<<=,int)
    DECL_ASN_OP_T(>>=,int)

#undef DECL_ASN_OP_T
#undef DECL_ASN_OP_OTHER
#undef DECL_ASN_OP


    // auto-increment and auto-decrement

    const sc_fxval operator ++ ( int );
    const sc_fxval operator -- ( int );

    sc_fxnum& operator ++ ();
    sc_fxnum& operator -- ();


    // bit selection

    const sc_fxnum_bitref operator [] ( int ) const;
    sc_fxnum_bitref       operator [] ( int );

    const sc_fxnum_bitref bit( int ) const;
    sc_fxnum_bitref       bit( int );


    // part selection

    const sc_fxnum_subref operator () ( int, int ) const;
    sc_fxnum_subref       operator () ( int, int );

    const sc_fxnum_subref range( int, int ) const;
    sc_fxnum_subref       range( int, int );


    const sc_fxnum_subref operator () () const;
    sc_fxnum_subref       operator () ();

    const sc_fxnum_subref range() const;
    sc_fxnum_subref       range();


    // implicit conversion

    operator double() const;		// necessary evil!


    // explicit conversion to primitive types

    short          to_short() const;
    unsigned short to_ushort() const;
    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;
    float          to_float() const;
    double         to_double() const;


    // explicit conversion to character string

    const std::string to_string() const;
    const std::string to_string( sc_numrep ) const;
    const std::string to_string( sc_numrep, bool ) const;
    const std::string to_string( sc_fmt ) const;
    const std::string to_string( sc_numrep, sc_fmt ) const;
    const std::string to_string( sc_numrep, bool, sc_fmt ) const;

    const std::string to_dec() const;
    const std::string to_bin() const;
    const std::string to_oct() const;
    const std::string to_hex() const;


    // query value

    bool is_neg() const;
    bool is_zero() const;

    // internal use only;
    bool is_normal() const;