source: sources/src/entity.cc @ 50

/*------------------------------------------------------------\
|                                                             |
| Tool    :                  systemcass                       |
|                                                             |
| File    :                   entity.cc                       |
|                                                             |
| Author  :                 Buchmann Richard                  |
|                           Taktak Sami                       |
|                                                             |
| Date    :                   09_07_2004                      |
|                                                             |
\------------------------------------------------------------*/

/* 
 * This file is part of the Disydent Project
 * Copyright (C) Laboratoire LIP6 - Département ASIM
 * Universite Pierre et Marie Curie
 * 
 * Home page          : http://www-asim.lip6.fr/disydent
 * E-mail             : mailto:richard.buchmann@lip6.fr
 * 
 * This library is free software; you  can redistribute it and/or modify it
 * under the terms  of the GNU Library General Public  License as published
 * by the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 * 
 * Disydent is distributed  in the hope  that it  will be
 * useful, but WITHOUT  ANY WARRANTY; without even the  implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 * 
 * You should have received a copy  of the GNU General Public License along
 * with the GNU C Library; see the  file COPYING. If not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <cstring>
#include <iomanip>
#include <list>
#include <map>
#include <vector>

#include <cassert>
#include "entity.h"
#include "sc_port.h"
#include "sc_signal.h"
#include "sc_module.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

using namespace std;

namespace sc_core {
  equi_list_t equi_list;
  equi_table_t equi_table = NULL;

  ostream& operator << (ostream &, const entity &);
  ostream& operator << (ostream &, const equi_t &);

  struct predic4entity2equi_t_t
  {
    bool operator()(const entity &e1, const entity &e2) const
    {
      return e1.interface < e2.interface;
    }
  };

  typedef std::map<entity,equi_list_t::iterator,predic4entity2equi_t_t> entity2equi_it_t;

  ostream& operator << (ostream& o, const entity2equi_it_t &m)
  {
    entity2equi_it_t::const_iterator i;
    for (i = m.begin(); i != m.end(); ++i)
    {
      o << (i->first) << " : " << *(i->second) << "\n";
    }
    return o;
  }
  entity2equi_it_t equi_map;
        
  const equi_list_t& get_equi_list ()
        {
    return equi_list;
  }

  unsigned int
  max (unsigned int a, unsigned int b)
  {
        return (a > b)?a:b;
  }

  static
  int get_signal_table_size (const equi_list_t &e)
  {
                // bug fix : remove the 0x0 equi from the list
    equi_list_t::const_iterator i;
    int capacity = 0;
    for (i = e.begin (); i != e.end (); ++i) {
//cerr << i->begin()->object->name ();
      const entity &ent = *(i->begin());
      int     data_size = ent.data_size_in_bytes();
      int     number_of_part = ((data_size - 1) / sizeof(tab_t)) + 1;
      capacity += number_of_part;
    }
    return capacity;
  }

  int get_signal_table_size ()
  {
    return get_signal_table_size (equi_list);
  }

        sc_port_base*
        get_out_port (const equi_t &eq)
        {
                equi_t::const_iterator i;
                for (i = eq.begin (); i != eq.end (); ++i) {
                        const char *type = i->kind ();
                        if ((type == sc_core::sc_out_string)||(type == sc_core::sc_inout_string))
                                return i->port;
                }
                /*
                cerr << "Internal error : can't find out port in "
                        << eq << ".\n";
                exit(32);
                */
                return NULL;
        }
        
        static
        sc_port_base*
        get_localvar (equi_t &eq)
        {
                equi_t::iterator i;
                for (i = eq.begin (); i != eq.end (); ++i) {
                        const char *type = i->kind ();
                        if (strcmp (type, "sc_localvar") == 0)
                                return i->port;
                }
                return NULL;
        }

        static
        sc_port_base*
        get_signal (equi_t &eq)
        {
                equi_t::iterator i;
                for (i = eq.begin (); i != eq.end (); ++i) {
                        const char *type = i->kind ();
                        if (strcmp (type, "sc_signal") == 0)
                                return i->port;
                }
                return NULL;
        }

  equi_t& 
  get_equi (const sc_interface &i)
        {
                return get_equi (i.get_pointer ());
        }

  struct predic4tab_t2equi_t_t
  {
    bool operator()(const tab_t *t1, const tab_t *t2) const
    {
      return t1 < t2;
    }
  };

#define get_equi_SPEEDUP
  equi_t& 
  get_equi (const tab_t *pointer)
        {
    // result variable
                equi_list_t::iterator i;
#if defined(get_equi_SPEEDUP)
    typedef std::map<const tab_t *,equi_list_t::iterator,predic4tab_t2equi_t_t> tab_t2equi_it_t;
    static tab_t2equi_it_t tab2equi_map;
    assert(pointer != NULL);

    // boost
    tab_t2equi_it_t::/*const_*/iterator it = tab2equi_map.find (pointer);
    if (it != tab2equi_map.end ())
    {
      i = it->second;
      return *i;
    }
#endif
    //
                for (i = equi_list.begin (); i != equi_list.end (); ++i) {
      const equi_t::iterator &j = i->begin();
      const entity       &e = *j;
      const sc_interface *f = e.interface;
      const tab_t        *p = f->get_pointer ();
                        if (p == pointer)
      {
#if defined(get_equi_SPEEDUP)
        tab2equi_map[pointer] = i;
#endif
                                return *i;
      }
                }
                cerr << "Internal error : get_equi(" << pointer << ")\n";               
                exit (11);
        }
#undef get_equi_SPEEDUP

  bool
  has_equi (/*const*/ sc_port_base &port)
        {
    entity e(port);
    entity2equi_it_t::/*const_*/iterator it = equi_map.find (e);
    if (it == equi_map.end ())
    {
       return false;
    }
    return true;
  }

        static
        bool
        is_register (const equi_t &eq)
        {
                return eq.size () == 1;
        }
        
        static 
        int 
        count_level (const char *s, char c)
        {
                int i;
                int counter = 0;
                for (i = 0; s[i] != '\0'; ++i) {
                        if (s[i] == c)
                                ++counter;
                }
                return counter;
        }
        
        const char* 
  get_name (const equi_t& e)
        {
                equi_t::const_iterator top_iter = e.begin ();
#ifdef CONFIG_DEBUG
                if (top_iter == e.end ()) {
                        cerr << "Internal error : no signal in " << e << endl;
                        exit (25);
                }
                if (top_iter->object == NULL) {
                        cerr << "Internal error : no object bound to ";
                        cerr << *top_iter;
                        cerr << endl;
                        exit (26);
                }
                if (top_iter->object->name () == NULL) {
                        cerr << "Internal error : signal has no name.\n";
                        cerr << *top_iter;
                        cerr << endl;
                }
#endif
                int top_level = count_level (top_iter->object->name (),'.');
                equi_t::const_iterator i;
                for (i = ++(e.begin ()); i != e.end (); ++i) {
                        int current_level = count_level (i->object->name (),'.');
                        if (current_level < top_level) {
                                top_iter = i;
                                top_level = current_level;
                        }
                }
#if 0
                cerr << "get_name of " << e;
                cerr << " return " << top_iter->object->name () << endl;
#endif
                return top_iter->object->name ();
        }
        
        const char* 
  get_name (const tab_t *pointer)
        {
                return get_name (get_equi (pointer));
        }

        static 
  const sc_module& 
  get_module (const string &s)
        {
          instances_set_t::iterator i;
        for (i = instances_set.begin (); i != instances_set.end (); ++i) {
        if (strcmp ((*i)->name (), s.c_str ()) == 0)
                                return **i;
                }
                cerr << "Internal error : get_module\n";
                exit (27);
        }
                
  template<typename T> static 
        equi_list_t::iterator get_equi (T &e)
  {
    entity2equi_it_t::iterator it = equi_map.find (entity(e));
    if (it == equi_map.end())
    {
//      cerr << "Internal error : get_equi (T &)";
      return equi_list.end ();         
    }
    return it->second;
  }

  template<typename T> static
  void 
  add_equi (equi_list_t::iterator &x, T &y)
  {
    entity e(y);
    x->push_back (e);
    equi_map[e] = x;
  }
 
  template<typename T> static
  equi_list_t::iterator 
  new_equi (T &x) /* parameter is not 'const' because we need to modify pointer port/signal at end of elaboration step */
  {
    equi_list_t::iterator it = equi_list.insert (equi_list.begin (),equi_t(1,entity(x)));
    equi_map[entity(x)] = it;
    return it;
  }

  // sort by number of connected ports  bound to the signal
        static
        int 
  operator<(const equi_t &e1, const equi_t &e2) 
        { 
                return (e1.size() < e2.size ());
        }

        // sort by data size
/*      
        int operator<(const equi_t &e1, const equi_t &e2) 
        { 
                return (e1.begin()->data_size () < e2.begin()->data_size ());
        }
*/      
        // random sort
/*      
        int operator<(const equi_t &e1, const equi_t &e2) 
        { 
        typedef std::map<const equi_t*,int> m_t;
        static m_t m;
                if (m[&e1] == 0)
                        m[&e1] = rand ();
                if (m[&e2] == 0)
                        m[&e2] = rand ();
                return m[&e1] < m[&e2]; 
        }
*/
  void sort_equi_list ()
  {
                //load ();
    equi_list.sort ();
    //equi_list.reverse ();
        }
        
#if defined(DUMP_SIGNAL_STATS)
        static unsigned int equi_real_size;
#endif

  unsigned int 
  get_sizeof_signals_table ()
  {
    equi_list_t::iterator i;
    int table_size = 0;
                //cerr << "external table includes :\n";
    for (i = equi_list.begin (); i != equi_list.end (); ++i) {
                        if (get_out_port (*i))
                                continue;
                        if (get_signal (*i))
                                continue;
                        //cerr << get_name (*i) << " ";
      const entity &ent = *(i->begin());
      int     data_size = ent.data_size_in_bytes();
      int     number_of_part = ((data_size - 1) / sizeof(tab_t)) + 1;
                        table_size += number_of_part;
                }
    return table_size;
  }

  void 
  create_signals_table ()
  {
    if (dump_stage)
                cerr << "Allocating signals table.\n";
                //cerr << "\n";
    unsigned int table_size = get_sizeof_signals_table ();
                equi_table = new tab_t[table_size]; //(0xCD);
#if defined(DUMP_SIGNAL_STATS)
                equi_real_size = table_size;
#endif
#if defined(INIT_SIGNALS_TO_ZERO)
                memset (equi_table, 0, sizeof (tab_t) * table_size);
#else
                memset (equi_table, 0xCD, sizeof (tab_t) * table_size);         
#endif
  }

        static
  void 
  bind_equi_to_table (equi_t &e, tab_t * const pointer)
  {
    assert(pointer != NULL);
    equi_t::iterator i;
    for (i = e.begin (); i != e.end (); ++i) {
      sc_interface *const inter = i->interface;
      inter->set_pointer (pointer);
      // We can't initialize data to zero there 
      // because we can't write the right amount of bits.
      // It may produce some segmentation fault errors.
      // The pointer is aligned to 32 bits.
    }
  }
  
  void 
  bind_to_table ()
  {
    if (dump_stage)
                cerr << "Binding ports/signals to the table.\n";
    equi_list_t::iterator i;
    int index = 0;
    for (i = equi_list.begin (); i != equi_list.end (); ++i)            {
                        sc_interface *out = get_out_port (*i);
                        if (out) {
                                bind_equi_to_table (*i, out->get_pointer ());
                        } else {
                                sc_interface *reg = get_signal (*i);
                                if (reg == NULL)
          reg = get_localvar (*i);
                                if (reg) {
          bind_equi_to_table (*i, reg->get_pointer ());
                                } else {
                bind_equi_to_table (*i, &(equi_table[index]));
                                  index += (i->begin()->data_size_in_bytes() - 1) / sizeof(tab_t) + 1;
                                }
                        }
    }
  }

  ostream& 
  operator << (ostream &o, const entity &e)
  {
#if 0
    o << "entity (";
    if (e.object)
      o << e.object->name ();
    else
      o << "no object";
    if (e.interface)
      o << ", pointer = 0x" << hex << e.interface->get_pointer ();
    else
      o << ", no interface";
    o << ")";
#else
   assert(e.object != NULL); 
   o << e.object->name ();
#endif
    return o;
  }
  
  ostream& 
  operator << (ostream &o, const equi_t &e)
  {
    bool nb = 0;
    equi_t::const_iterator i;
    for (i = e.begin (); i != e.end (); ++i) {
      const entity &ity = *i;
      o << ((nb++)?" = ":"") << ity;
    }     
    return o;
  }
  
  void 
  print_table (ostream &o)
  {
    o << "Signal list\n"
      << "-----------\n";
    equi_list_t::const_iterator i;
    for (i = equi_list.begin (); i != equi_list.end (); ++i) {
      const equi_t &eq = *i;
#if 0
      o << i->begin()->interface->get_pointer () << " : ";
            o << (*i);
            o << "\n";
#else
      o << "(" << get_name (eq) << ") <=> " << eq << ".\n";
#endif
    }
        }

        void
  print_table_stats (ostream &o)
  {
#if defined(DUMP_SIGNAL_STATS)
                int nb_reg = 0;
                int nb_sig = 0;
                int real_size = 0;
                
                // count
    equi_list_t::const_iterator i;
                int num;
    for (num = 0, i = equi_list.begin (); i != equi_list.end (); ++num, ++i) {
            if (is_register (*i))
                                ++nb_reg;
                        else
                                ++nb_sig;
    }
                
                // print results
                o << "Statistics :\n";
                o << "#registers : " << nb_reg << endl;
                o << "#signals : " << nb_sig << endl;
                o << "current table size : " << equi_real_size << endl;
#endif
        }

#ifdef DUMP_SIGNAL_STATS
typedef map<tab_t*,long long int> counter_t;
static counter_t  counter;
long long int unnecessary = 0;
long long int total_assig = 0;
#endif

const char* 
get_module_name (const equi_t &eq)
{
        if (!is_register (eq)) {
        /*
                cerr << "get_module_name doesn't work yet upon non-register.\n";
                
        const sc_port_base &port = *(i->port);
        const sc_module &module = port.get_module ();
        */
                return "top_level";
        }
        const entity &ent = *(eq.begin ());
#ifdef CONFIG_DEBUG
        if (ent.type != sc_core::entity::SIGNAL)
                exit(28);
#endif
        // get module name from sc_signal used like a register
        const char *sig_name = ent.object->name ();
        const char *sep  = strchr (sig_name,'.');
#ifdef CONFIG_DEBUG
        if (sep == NULL) {
                exit (30);
        }
#endif
        int end_pos = sep - sig_name;
        string module_name (sig_name, end_pos);
        // can't return the char* pointer from string since it will be invalid.
        return get_module (module_name).name ();
}

static 
void 
merge_equi (equi_list_t::iterator &x, equi_list_t::iterator &y)
{
  equi_t::iterator i;
  equi_t &y2 = *y;
  for (i = y2.begin(); i != y2.end(); ++i)
  {
    entity &e = *i;
    equi_map[e] = x;
  }

  x->merge  (*y);
  equi_list.erase (y);
}
 
// sort by data size
#ifdef DATASIZE_SORT
int 
operator<(const equi_t &e1, const equi_t &e2) 
{ 
        return (e1.begin()->data_size () < e2.begin()->data_size ());
}
#endif

// random sort
#ifdef RANDOM_SORT
int 
operator<(const equi_t &e1, const equi_t &e2) 
{ 
typedef std::map<const equi_t*,int> m_t;
static m_t m;
        if (m[&e1] == 0)
                m[&e1] = rand ();
        if (m[&e2] == 0)
                m[&e2] = rand ();
        return m[&e1] < m[&e2]; 
}
#endif

#if defined(DUMP_SIGNAL_STATS)
static unsigned int equi_real_size;
#endif

void 
bind (sc_signal_base &x)
{
#if 0 
//defined(CONFIG_DEBUG)
  equi_list_t::iterator x_equi = get_equi (x);
  if ((x_equi != equi_list.end())) {
    cerr << "Internal error : Signal already in the table\n";
    return;
  }
#endif
  new_equi (x);
}

void 
bind (sc_port_base &x)
{
  new_equi (x);
}

template <typename T> static
void 
test_before_bind (sc_port_base& p1,T& p2)
{
        bool t1 = (p1.kind () != NULL);
        bool t2 = (p2.kind () != NULL);
        if (t1 && t2)
                return;
        if (t1 == true)
                cerr << "Trying to bind '" << p1.name() << "' to an unknown type.\n";
        else if (t2 == true)
                cerr << "Trying to bind '" << p2.name() << "' to an unknown type.\n";
        else
                cerr << "Binding failed. Please check the netlist description.\n";
        exit (20040525);
}

template <typename T> static
void 
tbind (sc_port_base &x,T &y)
{
//  assert(x.get_pointer () != NULL); // x pointer may be NULL
//  assert(y.get_pointer () != NULL); // y pointer may be NULL
  equi_list_t::iterator x_equi = get_equi (x);
  equi_list_t::iterator y_equi = get_equi (y);
  if ((x_equi != equi_list.end()) && (y_equi != equi_list.end())) {
    // 2 equipotentials are equals
    merge_equi (x_equi, y_equi);
  } else if ((x_equi != equi_list.end())) {
    // add y
    add_equi (x_equi,y);
  } else if ((y_equi != equi_list.end())) {
    // add y
    add_equi (y_equi,x);
  } else {
    // add a new equi
    x_equi = new_equi (x);
    add_equi (x_equi, y);
  }
}

void 
bind (sc_port_base& p1,sc_port_base& p2)
{ test_before_bind (p1, p2); tbind (p1, p2); }

void 
bind (sc_port_base& p1,sc_signal_base& s1)
{ test_before_bind (p1, s1); tbind (p1, s1); }


} // end of sc_core namespace