sc_int_base.h

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/*****************************************************************************

  The following code is derived, directly or indirectly, from the SystemC
  source code Copyright (c) 1996-2002 by all Contributors.
  All Rights reserved.

  The contents of this file are subject to the restrictions and limitations
  set forth in the SystemC Open Source License Version 2.3 (the "License");
  You may not use this file except in compliance with such restrictions and
  limitations. You may obtain instructions on how to receive a copy of the
  License at http://www.systemc.org/. Software distributed by Contributors
  under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
  ANY KIND, either express or implied. See the License for the specific
  language governing rights and limitations under the License.

 *****************************************************************************/

/*****************************************************************************

  sc_int_base.h -- A sc_int is a signed integer whose length is less than the
              machine's native integer length. We provide two implementations
              (i) sc_int with length between 1 - 64, and (ii) sc_int with
              length between 1 - 32. Implementation (i) is the default
              implementation, while implementation (ii) can be used only if
              the class library is compiled with -D_32BIT_. Unlike arbitrary
              precision, arithmetic and bitwise operations are performed
              using the native types (hence capped at 32/64 bits). The sc_int
              integer is useful when the user does not need arbitrary
              precision and the performance is superior to
              sc_bigint/sc_biguint.

  Original Author: Amit Rao, Synopsys, Inc.

 *****************************************************************************/

/*****************************************************************************

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.

      Name, Affiliation, Date: Ali Dasdan, Synopsys, Inc.
  Description of Modification: - Resolved ambiguity with sc_(un)signed.
                               - Merged the code for 64- and 32-bit versions
                                 via the constants in sc_nbdefs.h.
                               - Eliminated redundant file inclusions.
    
      Name, Affiliation, Date:
  Description of Modification:

 *****************************************************************************/

#ifndef SC_INT_BASE_H
#define SC_INT_BASE_H


#include "systemc/datatypes/int/sc_int_ids.h"
#include "systemc/datatypes/int/sc_length_param.h"
#include "systemc/datatypes/int/sc_nbdefs.h"
#include "systemc/utils/sc_iostream.h"


namespace sc_dt
{

// classes defined in this module
template <class T1, class T2> class sc_int_concref_r;
template <class T1, class T2> class sc_int_concref;
class sc_int_bitref_r;
class sc_int_bitref;
class sc_int_subref_r;
class sc_int_subref;
class sc_int_base;

// forward class declarations
class sc_bv_base;
class sc_lv_base;
class sc_signed;
class sc_unsigned;
class sc_fxval;
class sc_fxval_fast;
class sc_fxnum;
class sc_fxnum_fast;


extern const uint_type mask_int[SC_INTWIDTH][SC_INTWIDTH];


// to avoid code bloat in sc_int_concref<T1,T2>

extern
void
sc_int_concref_invalid_length( int length );


// ----------------------------------------------------------------------------
//  CLASS TEMPLATE : sc_int_concref_r<T1,T2>
//
//  Proxy class for sc_int concatenation (r-value only).
// ----------------------------------------------------------------------------

template <class T1, class T2>
class sc_int_concref_r
{
    // support methods

    void check_length() const
	{ if( m_len > SC_INTWIDTH ) sc_int_concref_invalid_length( m_len ); }

public:

    // constructor

    sc_int_concref_r( const T1& left_, const T2& right_, int delete_ = 0 )
        : m_left( CCAST<T1&>( left_ ) ), m_right( CCAST<T2&>( right_ ) ),
	  m_delete( delete_ ), m_refs( *new int( 1 ) )
        { m_len = m_left.length() + m_right.length(); check_length(); }


    // copy constructor

    sc_int_concref_r( const sc_int_concref_r<T1,T2>& a )
        : m_left( a.m_left ), m_right( a.m_right ), m_len( a.m_len ),
          m_delete( a.m_delete ), m_refs( a.m_refs )
	{ ++ m_refs; }


    // destructor

    ~sc_int_concref_r();


    // cloning

    sc_int_concref_r<T1,T2>* clone() const
        { return new sc_int_concref_r<T1,T2>( *this ); }


    // capacity

    int length() const
	{ return m_len; }

#ifdef SC_DT_DEPRECATED
    int bitwidth() const
        { return length(); }
#endif


    // 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() ); }


    // implicit conversion to int_type

    operator int_type() const;


    // explicit conversions

    int_type value() const
	{ return operator int_type(); }


    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;


    // explicit conversion to character string

    const sc_string to_string( sc_numrep numrep = SC_DEC ) const;
    const sc_string to_string( sc_numrep numrep, bool w_prefix ) const;


    // other methods

    void print( ostream& os = cout ) const
	{ os << to_string(); }

protected:

    T1&          m_left;
    T2&          m_right;
    int          m_len;
    mutable int  m_delete;
    mutable int& m_refs;

private:

    // disabled
    sc_int_concref_r();
    sc_int_concref_r<T1,T2>& operator = ( const sc_int_concref_r<T1,T2>& );
};


// r-value concatenation operators and functions

template <class T1, class T2, class T3, class T4>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_concref_r<T3,T4> >
operator , ( sc_int_concref_r<T1,T2>, sc_int_concref_r<T3,T4> );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_bitref_r>
operator , ( sc_int_concref_r<T1,T2>, sc_int_bitref_r );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_subref_r>
operator , ( sc_int_concref_r<T1,T2>, sc_int_subref_r );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
operator , ( sc_int_concref_r<T1,T2>, const sc_int_base& );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
operator , ( sc_int_concref_r<T1,T2>, bool );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_base,sc_int_concref_r<T1,T2> >
operator , ( bool, sc_int_concref_r<T1,T2> );


template <class T1, class T2, class T3, class T4>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_concref_r<T3,T4> >
concat( sc_int_concref_r<T1,T2>, sc_int_concref_r<T3,T4> );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_bitref_r>
concat( sc_int_concref_r<T1,T2>, sc_int_bitref_r );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_subref_r>
concat( sc_int_concref_r<T1,T2>, sc_int_subref_r );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
concat( sc_int_concref_r<T1,T2>, const sc_int_base& );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
concat( sc_int_concref_r<T1,T2>, bool );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_base,sc_int_concref_r<T1,T2> >
concat( bool, sc_int_concref_r<T1,T2> );


#ifdef SC_DT_MIXED_COMMA_OPERATORS

template <class T1, class T2, class T3, class T4>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_concref_r<T3,T4> >
operator , ( sc_int_concref_r<T1,T2>, sc_int_concref<T3,T4> );

template <class T1, class T2, class T3, class T4>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_concref_r<T3,T4> >
operator , ( sc_int_concref<T1,T2>, sc_int_concref_r<T3,T4> );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_bitref_r>
operator , ( sc_int_concref_r<T1,T2>, sc_int_bitref );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_bitref_r>
operator , ( sc_int_concref<T1,T2>, sc_int_bitref_r );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_subref_r>
operator , ( sc_int_concref_r<T1,T2>, sc_int_subref );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_subref_r>
operator , ( sc_int_concref<T1,T2>, sc_int_subref_r );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
operator , ( sc_int_concref_r<T1,T2>, sc_int_base& );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
operator , ( sc_int_concref<T1,T2>, const sc_int_base& );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
operator , ( sc_int_concref<T1,T2>, bool );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_base,sc_int_concref_r<T1,T2> >
operator , ( bool, sc_int_concref<T1,T2> );


template <class T1, class T2, class T3, class T4>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_concref_r<T3,T4> >
concat( sc_int_concref_r<T1,T2>, sc_int_concref<T3,T4> );

template <class T1, class T2, class T3, class T4>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_concref_r<T3,T4> >
concat( sc_int_concref<T1,T2>, sc_int_concref_r<T3,T4> );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_bitref_r>
concat( sc_int_concref_r<T1,T2>, sc_int_bitref );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_bitref_r>
concat( sc_int_concref<T1,T2>, sc_int_bitref_r );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_subref_r>
concat( sc_int_concref_r<T1,T2>, sc_int_subref );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_subref_r>
concat( sc_int_concref<T1,T2>, sc_int_subref_r );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
concat( sc_int_concref_r<T1,T2>, sc_int_base& );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
concat( sc_int_concref<T1,T2>, const sc_int_base& );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_concref_r<T1,T2>,sc_int_base>
concat( sc_int_concref<T1,T2>, bool );

template <class T1, class T2>
inline
sc_int_concref_r<sc_int_base,sc_int_concref_r<T1,T2> >
concat( bool, sc_int_concref<T1,T2> );

#endif


template <class T1, class T2>
inline
ostream&
operator << ( ostream&, const sc_int_concref_r<T1,T2>& );


// ----------------------------------------------------------------------------
//  CLASS TEMPLATE : sc_int_concref<T1,T2>
//
//  Proxy class for sc_int concatenation (r-value and l-value).
// ----------------------------------------------------------------------------

template <class T1, class T2>
class sc_int_concref
    : public sc_int_concref_r<T1,T2>
{
public:

    // constructor

    sc_int_concref( T1& left_, T2& right_, int delete_ = 0 )
	: sc_int_concref_r<T1,T2>( left_, right_, delete_ )
	{}


    // copy constructor

    sc_int_concref( const sc_int_concref<T1,T2>& a )
	: sc_int_concref_r<T1,T2>( a )
	{}


    // cloning

    sc_int_concref<T1,T2>* clone() const
        { return new sc_int_concref<T1,T2>( *this ); }


    // assignment operators

    sc_int_concref<T1,T2>& operator = ( int_type v );

    template <class T3, class T4>
    sc_int_concref<T1,T2>& operator = ( const sc_int_concref_r<T3,T4>& a )
        { return operator = ( a.operator int_type() ); }

    template <class T3, class T4>
    sc_int_concref<T1,T2>& operator = ( const sc_int_concref<T3,T4>& a )
        { return operator = ( a.operator int_type() ); }

    sc_int_concref<T1,T2>& operator = ( const sc_int_base& a );
    sc_int_concref<T1,T2>& operator = ( const sc_int_subref_r& a );
    sc_int_concref<T1,T2>& operator = ( const char* a );

    sc_int_concref<T1,T2>& operator = ( unsigned long a )
	{ return operator = ( (int_type) a ); }

    sc_int_concref<T1,T2>& operator = ( long a )
	{ return operator = ( (int_type) a ); }

    sc_int_concref<T1,T2>& operator = ( unsigned int a )
	{ return operator = ( (int_type) a ); }

    sc_int_concref<T1,T2>& operator = ( int a )
	{ return operator = ( (int_type) a ); }

    sc_int_concref<T1,T2>& operator = ( uint64 a )
	{ return operator = ( (int_type) a ); }

    sc_int_concref<T1,T2>& operator = ( double a )
	{ return operator = ( (int_type) a ); }

    sc_int_concref<T1,T2>& operator = ( const sc_signed& );
    sc_int_concref<T1,T2>& operator = ( const sc_unsigned& );
    sc_int_concref<T1,T2>& operator = ( const sc_bv_base& );
    sc_int_concref<T1,T2>& operator = ( const sc_lv_base& );


    // other methods

    void scan( istream& is = cin );

private:

    // disabled
    sc_int_concref();
};


// l-value concatenation operators and functions

template <class T1, class T2, class T3, class T4>
inline
sc_int_concref<sc_int_concref<T1,T2>,sc_int_concref<T3,T4> >
operator , ( sc_int_concref<T1,T2>, sc_int_concref<T3,T4> );

template <class T1, class T2>
inline
sc_int_concref<sc_int_concref<T1,T2>,sc_int_bitref>
operator , ( sc_int_concref<T1,T2>, sc_int_bitref );

template <class T1, class T2>
inline
sc_int_concref<sc_int_concref<T1,T2>,sc_int_subref>
operator , ( sc_int_concref<T1,T2>, sc_int_subref );

template <class T1, class T2>
inline
sc_int_concref<sc_int_concref<T1,T2>,sc_int_base>
operator , ( sc_int_concref<T1,T2>, sc_int_base& );


template <class T1, class T2, class T3, class T4>
inline
sc_int_concref<sc_int_concref<T1,T2>,sc_int_concref<T3,T4> >
concat( sc_int_concref<T1,T2>, sc_int_concref<T3,T4> );

template <class T1, class T2>
inline
sc_int_concref<sc_int_concref<T1,T2>,sc_int_bitref>
concat( sc_int_concref<T1,T2>, sc_int_bitref );

template <class T1, class T2>
inline
sc_int_concref<sc_int_concref<T1,T2>,sc_int_subref>
concat( sc_int_concref<T1,T2>, sc_int_subref );

template <class T1, class T2>
inline
sc_int_concref<sc_int_concref<T1,T2>,sc_int_base>
concat( sc_int_concref<T1,T2>, sc_int_base& );


template <class T1, class T2>
inline
istream&
operator >> ( istream&, sc_int_concref<T1,T2>& );


// ----------------------------------------------------------------------------
//  CLASS : sc_int_bitref_r
//
//  Proxy class for sc_int bit selection (r-value only).
// ----------------------------------------------------------------------------

class sc_int_bitref_r
{
    friend class sc_int_base;

protected:

    // constructor
  
    sc_int_bitref_r( const sc_int_base& obj_, int index_ )
        : m_obj( CCAST<sc_int_base&>( obj_ ) ), m_index( index_ )
        {}