sc_macros.h

system C源码 一种替代verilog的语言

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

  The following code is derived, directly or indirectly, from the SystemC
  source code Copyright (c) 1996-2006 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 2.4 (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_macros.h -- Miscellaneous definitions that are needed by the headers.

  Original Author: Stan Y. Liao, Synopsys, Inc.

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

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

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

      Name, Affiliation, Date:
  Description of Modification:

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

// $Log: sc_macros.h,v $
// Revision 1.1.1.1  2006/12/15 20:31:37  acg
// SystemC 2.2
//
// Revision 1.3  2006/01/13 18:44:29  acg
// Added $Log to record CVS changes into the source.
//

#ifndef SC_MACROS_H
#define SC_MACROS_H


namespace sc_dt {

template <class T>
inline
const T
sc_min( const T& a, const T& b )
{
    return ( ( a <= b ) ? a : b );
}

template <class T>
inline
const T
sc_max( const T& a, const T& b )
{
    return ( ( a >= b ) ? a : b );
}

template <class T>
inline
const T
sc_abs( const T& a )
{
    // return ( a >= 0 ? a : -a );
    // the code below is functionaly the same as the code above; the
    // difference is that the code below works for all arithmetic
    // SystemC datatypes.
    T z( a );
    z = 0;
    if( a >= z ) {
	return a;
    } else {
	T c( a );
	c = -a;
	return c;
    }
}

} // namespace sc_dt 

namespace sc_core {


#if defined(__GNUC__) && defined(USE_RTTI)
#define HAVE_CAST_OPERATORS
#endif


#if defined(__GNUC__)
// 10.3.5 - Some compilers (e.g. K&A C++) do not support the
// construct in which a virtual function defined in a subclass returns
// a pointer or reference to a class D whereas the declaration of the
// same virtual function in the base class returns a pointer or
// reference to a base class B of D.
#define ANSI_VIRTUAL_RETURN_INHERITED_TYPE
#endif


/*
 *  Note that sc_get_curr_simcontext() may also be a member
 *  of sc_module. The idea is that if we are inside an sc_module,
 *  then its associated simcontext should always be the current
 *  simcontext.
 */

#define W_BEGIN                                                               \
    do {                                                                      \
        sc_watch __aux_watch( sc_get_curr_simcontext() );

#define W_DO                                                                  \
        try {                                                                 \
            __watching_first( __aux_watch.cthread_h );

#define W_ESCAPE                                                              \
        }                                                                     \
        catch( int sc_level ) {                                               \
            __sanitycheck_watchlists( __aux_watch.cthread_h );                \
            if( sc_level < __watch_level( __aux_watch.cthread_h ) ) {         \
                throw sc_level;                                               \
            }

#define W_END                                                                 \
        }                                                                     \
    } while( false );


/*
 *  These help debugging --
 *  -- user can find out where each process is stopped at.
 */

#define WAIT()                                                                \
    sc_set_location( __FILE__, __LINE__ );                                    \
    wait()

#define WAITN(n)                                                              \
    sc_set_location( __FILE__, __LINE__ );                                    \
    wait(n)

#define WAIT_UNTIL(expr)                                                    \
    sc_set_location( __FILE__, __LINE__ );                                    \
    do { wait(); } while( !(expr) )

} // namespace sc_core

#endif