/*****************************************************************************
Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
more contributor license agreements. See the NOTICE file distributed
with this work for additional information regarding copyright ownership.
Accellera licenses this file to you under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with the
License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied. See the License for the specific language governing
permissions and limitations under the License.
*****************************************************************************/
/*****************************************************************************
sc_signal_rv.h -- The resolved vector signal class.
Original Author: Martin Janssen, Synopsys, Inc., 2001-05-21
CHANGE LOG IS AT THE END OF THE FILE
*****************************************************************************/
#ifndef SC_SIGNAL_RV_H
#define SC_SIGNAL_RV_H
#include "sysc/communication/sc_signal.h"
#include "sysc/datatypes/bit/sc_lv.h"
namespace sc_core {
class sc_process_b;
// ----------------------------------------------------------------------------
// CLASS sc_lv_resolve<W>
//
// Resolution function for sc_dt::sc_lv<W>.
// ----------------------------------------------------------------------------
extern const sc_dt::sc_logic_value_t sc_logic_resolution_tbl[4][4];
template <int W>
class sc_lv_resolve
{
public:
// resolves sc_dt::sc_lv<W> values and returns the resolved value
static void resolve(sc_dt::sc_lv<W>&, const std::vector<sc_dt::sc_lv<W>*>&);
};
// IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
// resolves sc_dt::sc_lv<W> values and returns the resolved value
template <int W>
inline
void
sc_lv_resolve<W>::resolve( sc_dt::sc_lv<W>& result_,
const std::vector<sc_dt::sc_lv<W>*>& values_ )
{
int sz = values_.size();
assert( sz != 0 );
if( sz == 1 ) {
result_ = *values_[0];
return;
}
for( int j = result_.length() - 1; j >= 0; -- j ) {
sc_dt::sc_logic_value_t res = (*values_[0])[j].value();
for( int i = sz - 1; i > 0 && res != 3; -- i ) {
res = sc_logic_resolution_tbl[res][(*values_[i])[j].value()];
}
result_[j] = res;
}
}
// ----------------------------------------------------------------------------
// CLASS : sc_signal_rv<W>
//
// The resolved vector signal class.
// ----------------------------------------------------------------------------
template <int W>
class sc_signal_rv
: public sc_signal<sc_dt::sc_lv<W>, SC_MANY_WRITERS>
{
public:
// typedefs
typedef sc_signal_rv<W> this_type;
typedef sc_signal<sc_dt::sc_lv<W>, SC_MANY_WRITERS> base_type;
typedef sc_dt::sc_lv<W> data_type;
public:
// constructors
sc_signal_rv()
: base_type( sc_gen_unique_name( "signal_rv" ) )
{}
explicit sc_signal_rv( const char* name_ )
: base_type( name_ )
{}
// destructor
virtual ~sc_signal_rv();
// interface methods
virtual void register_port( sc_port_base&, const char* )
{}
// write the new value
virtual void write( const data_type& );
// other methods
this_type& operator = ( const data_type& a )
{ write( a ); return *this; }
this_type& operator = ( const this_type& a )
{ write( a.read() ); return *this; }
virtual const char* kind() const
{ return "sc_signal_rv"; }
protected:
virtual void update();
protected:
std::vector<sc_process_b*> m_proc_vec; // processes writing this signal
std::vector<data_type*> m_val_vec; // new values written this signal
private:
// disabled
sc_signal_rv( const this_type& );
};
// IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
// destructor
template <int W>
inline
sc_signal_rv<W>::~sc_signal_rv()
{
for( int i = m_val_vec.size() - 1; i >= 0; -- i ) {
delete m_val_vec[i];
}
}
// write the new value
template <int W>
inline
void
sc_signal_rv<W>::write( const data_type& value_ )
{
sc_process_b* cur_proc = sc_get_current_process_b();
bool value_changed = false;
bool found = false;
for( int i = m_proc_vec.size() - 1; i >= 0; -- i ) {
if( cur_proc == m_proc_vec[i] ) {
if( value_ != *m_val_vec[i] ) {
*m_val_vec[i] = value_;
value_changed = true;
}
found = true;
break;
}
}
if( ! found ) {
m_proc_vec.push_back( cur_proc );
m_val_vec.push_back( new data_type( value_ ) );
value_changed = true;
}
if( value_changed ) {
this->request_update();
}
}
template <int W>
inline
void
sc_signal_rv<W>::update()
{
sc_lv_resolve<W>::resolve( this->m_new_val, m_val_vec );
base_type::update();
}
} // namespace sc_core
//$Log: sc_signal_rv.h,v $
//Revision 1.4 2011/08/26 20:45:44 acg
// Andy Goodrich: moved the modification log to the end of the file to
// eliminate source line number skew when check-ins are done.
//
//Revision 1.3 2011/04/19 02:36:26 acg
// Philipp A. Hartmann: new aysnc_update and mutex support.
//
//Revision 1.2 2011/02/18 20:23:45 acg
// Andy Goodrich: Copyright update.
//
//Revision 1.1.1.1 2006/12/15 20:20:04 acg
//SystemC 2.3
//
//Revision 1.3 2006/03/21 00:00:27 acg
// Andy Goodrich: changed name of sc_get_current_process_base() to be
// sc_get_current_process_b() since its returning an sc_process_b instance.
//
//Revision 1.2 2006/01/03 23:18:26 acg
//Changed copyright to include 2006.
//
//Revision 1.1.1.1 2005/12/19 23:16:43 acg
//First check in of SystemC 2.1 into its own archive.
//
//Revision 1.10 2005/09/15 23:01:52 acg
//Added std:: prefix to appropriate methods and types to get around
//issues with the Edison Front End.
//
//Revision 1.9 2005/06/10 22:43:55 acg
//Added CVS change log annotation.
//
#endif
// Taf!