source: sources/src/sc_port_ext.h @ 3

/*------------------------------------------------------------\
|                                                             |
| Tool    :                  systemcass                       |
|                                                             |
| File    :                   sc_port_ext.h                   |
|                                                             |
| Author  :                 Buchmann Richard                  |
|                           Taktak Sami                       |
|                                                             |
| Date    :                   09_07_2004                      |
|                                                             |
\------------------------------------------------------------*/
#ifndef __SC_PORT_EXT_H__
#define __SC_PORT_EXT_H__

// Define registers writing method
#include<iostream>
#include"sc_fwd.h"
#include"sc_nbdefs.h"
//#include"sc_event_finder.h"
#include"sc_event.h"
#include"sc_object.h"
#include"sc_interface.h"
#include"internal_ext.h"
#include"port_dependency_ext.h"
#include"fsm_rules.h"


//__GNUC__
//__GNUC_MINOR__
//__GNUC_PATCHLEVEL__
//
#if ((__GNUC__ < 3) || (__GNUC_MINOR__ < 4))
#define INLINE __attribute__((always_inline))
#else
/* gcc3.4 doesn't support */ 
#define INLINE
#endif

#include <list>

//
namespace sc_core {
//
const char *get_name        (const tab_t *pointer);

#define READ_SIGNAL(value_type_,pointer_) \
        ((value_type_&) (*((value_type_*) (pointer_))))

        ///////////////////// DEPRECATED
// C ANSI-only since it is needed to link with extern "C"
// this declaration is not in casc.h since the CHECK_FSM_RULES macro
// is not defined.

extern void bind (sc_port_base&,sc_port_base&);
extern void bind (sc_port_base&,sc_signal_base&);
extern void bind (sc_signal_base &x);
extern void bind (sc_port_base   &x);

// KIND STRING
extern const char * const sc_inout_string;
extern const char * const sc_in_string;
extern const char * const sc_out_string;  

extern "C" void update (void);

class sc_port_base : public sc_object, public sc_interface
{
protected:
  typedef sc_port_base                        base_type;
public:
        ///////////
        // Internal
        const sc_module &get_module () const;
        void             init ();
  void             check_multiwriting2port () const;
        ///////////              
  
  friend std::ostream& operator << (std::ostream &, const sc_port_base &);
 
  // LRM
  //virtual const sc_event /*&*/ default_event () const;
  static const char* const kind_string;
//  virtual const char *kind () const;
  //
  sc_port_base();
  sc_port_base(const char* name_);
  explicit sc_port_base(const sc_port_base& parent_);
  /*virtual */~sc_port_base () {};
  // bind to a handle
  void operator () (method_process_t &func) const;
};

template < typename T > class sc_port_b:public sc_port_base
{
};

// ----------------------------------------------------------------------------
//  CLASS : sc_in<T>
//
// ----------------------------------------------------------------------------

template <typename T>
class sc_in : public sc_port_base
{
private:
  typedef T  data_type;
  typedef sc_port_base                  base_type;
  typedef sc_in<data_type>              this_type;
  typedef sc_signal<data_type>          signal_type;

        ///////////
        // Internal
  void init ();
        /*
        public: virtual size_t data_size () const
        { return sizeof (data_type); }
        */
        ///////////
public:
  // constructors
  sc_in(): base_type() { init (); }

  explicit sc_in(const char* name_): base_type(name_) { init (); }

  explicit sc_in(const base_type& parent_ ): base_type( parent_ ) { init (); }

        /*
  // LRM error !
  //static const char *const kind_string; this is a template !
        */
//  virtual const char *kind () const 
//  { return "sc_in"; };
 
#if 0
  // LRM
  sc_event_finder& neg () const { return *new sc_event_finder (*(sc_port_base*)this);};
  sc_event_finder& pos () const { return *new sc_event_finder (*(sc_port_base*)this);};
#endif

  sc_event         neg () const { return sc_event (*this, sc_event::NEG);};
  sc_event         pos () const { return sc_event (*this, sc_event::POS);};
  // read the current value
  inline const T& read() const INLINE;  
  inline operator const T& () const INLINE;

  // operateur ==
  inline bool operator == (const T& v) INLINE;

  // bind to in interface
  void operator () (sc_signal<data_type> &s)
  { sc_core::bind (*this,s); }
  
  // binding for hierarchical description
  void operator () (this_type &parent_)  
  { sc_core::bind (*this,parent_); }

  void operator () (sc_out<data_type> &o) 
  { sc_core::bind (*this,o); }

  /*virtual */~sc_in() {};

};

template <typename T>
void
sc_in<T>::init()
{ 
        set_kind (sc_in_string);
        sc_interface::init (sizeof (data_type)); 
}

// read
template <typename T> inline 
const T& 
sc_in<T>::read() const
{ 
#ifdef DUMP_READ
  std::cerr << "read " << READ_SIGNAL(const T&, get_pointer())
                << " on signal " << name () << "\n";
#endif
#ifdef CHECK_FSM_RULES
        if (casc_fsm_step == GEN_MOORE) {
                std::cerr << "FSM rules error : trying to read on input port '" 
                          << name ()
                          << "' from " <<  get_step_name () << " function.\n";
                exit (-1);
        }               
#endif
  return READ_SIGNAL(const T, get_pointer());
}
  
template <typename T> inline 
sc_in<T>::operator const T& () const
{ return sc_in<T>::read (); }

template <typename T> inline 
bool sc_in<T>::operator == (const T& v) {
  return sc_in<T>::read() == v;
}

// ----------------------------------------------------------------------------
//  CLASS : sc_inout<T>
//
// ----------------------------------------------------------------------------

template <typename T>
class sc_inout : public sc_port_base
{
        ///////////
        // Internal
protected:
  void init ();
        T val;
private:
  typedef T                                   data_type;

  typedef sc_inout<data_type>                 this_type;
  typedef sc_signal<data_type>                signal_type;

        /*
        public: virtual size_t data_size () const
        { return sizeof (data_type); }
        */
        ///////////
public:
  // contructeurs
  sc_inout(): base_type() { init (); };

  explicit sc_inout(const char* name_): base_type(name_) { init (); };

        /*
  // LRM error !
  //static const char *const kind_string; this is a template !
        */
  //virtual const char *kind () const 
  //{ return "sc_inout"; };
 
  // read the current value
  inline const T& read() const INLINE;
  // write the new value
  inline void write( const T& ) INLINE;
  template <int W> inline void write( const sc_uint<W>& v) 
  { sc_inout<T>::write (v.read()); }

  inline operator const T& () const INLINE;

  inline sc_inout<T>& operator = ( const T& a ) INLINE;
  
  inline sc_inout<T>& operator = ( const sc_signal<T>& a ) INLINE;

//  inline sc_inout<T>& operator = ( const sc_port_base& a ) INLINE;

  // operateur ==
  inline bool operator == (const bool& v) INLINE;

  // bind to in interface
  void operator () (sc_signal<data_type> &s)
  { bind (*this); bind (*this,s); }
  
  void operator () (this_type &parent_) 
  { bind (*this,parent_); }

  /*virtual */~sc_inout() {};
};

template <typename T>
void
sc_inout<T>::init ()
{
        set_pointer ((tab_t*)&val);
        sc_object::set_kind    (sc_inout_string);
        sc_interface::init (sizeof (data_type)); 
  /*ref*/ val = (0);
  //sc_inout::write (0);
    /* Fix : 
     * FSM checker generates an error at runtime 
     */

}

// read
template <typename T>
inline 
const T& 
sc_inout<T>::read() const
{ 
#ifdef DUMP_READ
  std::cerr << "read " << READ_SIGNAL(const T, get_pointer()) // val
                << " on signal " << name () << "\n";
#endif
#ifdef CHECK_FSM_RULES
        if (casc_fsm_step == GEN_MOORE) {
                std::cerr << "FSM rules error : trying to read on input/output port " 
                        << name () //get_name (get_pointer()) 
                        << " from " << get_step_name () << " function.\n";
                exit (-1);
        }               
#endif
//  return val; 
  return READ_SIGNAL(const T, get_pointer());
}

// write the new value
template <typename T>
inline
void
sc_inout<T>::write( const T& value_ )
{
#ifdef DUMP_WRITE
  std::cerr << "write " << value_ 
            << " on in/out port (writing into a signal) '" << name () << "'\n";
#endif
#ifdef CHECK_FSM_RULES
        if ((casc_fsm_step != GEN_MOORE) && ( casc_fsm_step != GEN_MEALY)) {
                std::cerr << "FSM rules error : trying to write on output port " 
                        << name () 
                        << " from an " << get_step_name () << " function.\n";
                exit (-1);
        }               
#endif
//      T& ref = *(T*)(get_pointer());
#if defined(CHECK_MULTIWRITING2PORT)
  check_multiwriting2port ();
#endif
#ifndef USE_PORT_DEPENDENCY
  unstable |= (value_) != val; //ref;
#endif
  /*ref*/ val = (value_);
}

template <typename T>
inline 
sc_inout<T>::operator const T& () const
{ return sc_inout<T>::read(); }

template <typename T>
inline sc_inout<T>& sc_inout<T>::operator = ( const T& a )
{ sc_inout<T>::write( a ); return *this; }

template <typename T>
inline 
sc_inout<T>& sc_inout<T>::operator = ( const sc_signal<T>& a )
{ sc_inout<T>::write( a.read() ); return *this; }
/*
template <typename T>
inline 
sc_inout<T>& sc_inout<T>::operator = ( const sc_port_base& a )
{ write( a.read() ); return *this; }
*/
template <typename T>
inline 
bool sc_inout<T>::operator == (const bool& v) 
{ return sc_inout<T>::read() == v; }

// ----------------------------------------------------------------------------
//  CLASS : sc_out<T>
//
// ----------------------------------------------------------------------------
// Official SystemC implementation notes :
// "sc_out can also read from its port, hence no difference with sc_inout.
// For debugging reasons, a class is provided instead of a define."

template <typename T>
class sc_out : public sc_inout<T>
{
        ///////////
        // Internal
  void init ();
        ///////////
public:
  // typedefs 
  typedef T data_type;
  typedef sc_inout<T> base_type;
  typedef sc_out<data_type>      this_type;
  typedef sc_signal<data_type>   signal_type;
public:
  // constructors & destructor 
  sc_out(): base_type() { init (); };
  explicit sc_out(const char* name_): base_type(name_) { init (); };
  sc_out (this_type & parent_);
  sc_out (const char *name_, this_type & parent_);

        /*
  // LRM error !
  //static const char *const kind_string; this is a template !
        */
  //virtual const char *kind () const 
  //{ return "sc_out"; };
 

  inline this_type& operator = ( const data_type& a ) INLINE;
  inline bool operator == (const bool& v) INLINE;

  // bind to in interface
  void operator () (sc_signal<data_type> &s)
  { bind (*this,s); }
  
  void operator () (this_type &parent_) 
  { bind (*this,parent_); }

        //////////////////////
        // Systemcass specific
  void operator () (sc_port_base &o)
  { set_port_dependency (&o, (sc_port_base&)(*this)); }
/*
  void operator () () // n'a pas de sens...
  { set_port_dependency (NULL, (sc_port_base&)(*this)); }
*/
        //////////////////////


  /*virtual */~ sc_out () {};

private:
  // disabled 
  sc_out (const this_type &);
};

//
template<typename T>
void
sc_out<T>::init ()
{
  sc_inout<T>::init ();
//      tab_t *t = &(sc_inout<T>::val);
//      sc_interface::set_pointer (t);
        sc_object::set_kind (sc_out_string);
//      sc_interface::init (sizeof (data_type)); 
//  /*ref*/ sc_inout<T>::val = 0;
  //sc_inout<T>::write (0); 
    /* Fix : 
     * FSM checker generates an error at runtime 
     */
}

template<typename T> inline 
sc_out<T>& 
sc_out<T>::operator = ( const data_type& a )
{ sc_out<T>::write( a ); return *this; }

template<typename T> inline 
bool 
sc_out<T>::operator == (const bool& v) 
{ return sc_out<T>::read() == v; }

// Dumps
template<typename T> inline 
std::ostream& operator<<( std::ostream& os, const sc_in<T> &r) 
{ return os << r.read (); }

// Add '&'
template<class T> inline 
std::ostream& operator<<( std::ostream& os, const sc_inout<T> &r) 
{ return os << r.read (); }

template<class T> inline 
std::ostream& operator<<( std::ostream& os, const sc_signal<T> &r)
{ return os << r.read (); }

// Declarations
typedef sc_in<bool> sc_in_clk;

#undef INLINE

#undef READ_SIGNAL

} // end of sc_core namespace

using sc_core::sc_in_clk;

#endif /* __SC_PORT_EXT_H__ */