sc_fxdefs.h

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  The contents of this file are subject to the restrictions and limitations
  set forth in the SystemC Open Source License (the "License");
  You may not use this file except in compliance with such restrictions and
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  License at http://www.accellera.org/. Software distributed by Contributors
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/*****************************************************************************

  sc_fxdefs.h - 

  Original Author: Martin Janssen, Synopsys, Inc.

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

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

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
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// $Log: sc_fxdefs.h,v $
// Revision 1.1.1.1  2006/12/15 20:20:04  acg
// SystemC 2.3
//
// Revision 1.3  2006/01/13 18:53:57  acg
// Andy Goodrich: added $Log command so that CVS comments are reproduced in
// the source.
//

#ifndef SC_FXDEFS_H
#define SC_FXDEFS_H


#include "sysc/utils/sc_machine.h"
#include "sysc/datatypes/fx/sc_fx_ids.h"
#include "sysc/datatypes/int/sc_nbutils.h"


namespace sc_dt
{

// ----------------------------------------------------------------------------
//  ENUM : sc_enc
//
//  Enumeration of sign encodings.
// ----------------------------------------------------------------------------

enum sc_enc
{
    SC_TC_,     // two's complement
    SC_US_      // unsigned
};


const std::string to_string( sc_enc );


inline
::std::ostream&
operator << ( ::std::ostream& os, sc_enc enc )
{
    return os << to_string( enc );
}


// ----------------------------------------------------------------------------
//  ENUM : sc_q_mode
//
//  Enumeration of quantization modes.
// ----------------------------------------------------------------------------

enum sc_q_mode
{
    SC_RND,             // rounding to plus infinity
    SC_RND_ZERO,        // rounding to zero
    SC_RND_MIN_INF,     // rounding to minus infinity
    SC_RND_INF,         // rounding to infinity
    SC_RND_CONV,        // convergent rounding
    SC_TRN,             // truncation
    SC_TRN_ZERO         // truncation to zero
};


const std::string to_string( sc_q_mode );


inline
::std::ostream&
operator << ( ::std::ostream& os, sc_q_mode q_mode )
{
    return os << to_string( q_mode );
}


// ----------------------------------------------------------------------------
//  ENUM : sc_o_mode
//
//  Enumeration of overflow modes.
// ----------------------------------------------------------------------------

enum sc_o_mode
{
    SC_SAT,             // saturation
    SC_SAT_ZERO,        // saturation to zero
    SC_SAT_SYM,         // symmetrical saturation
    SC_WRAP,            // wrap-around (*)
    SC_WRAP_SM          // sign magnitude wrap-around (*)
};

// (*) uses the number of saturated bits argument, see the documentation.


const std::string to_string( sc_o_mode );


inline
::std::ostream&
operator << ( ::std::ostream& os, sc_o_mode o_mode )
{
    return os << to_string( o_mode );
}


// ----------------------------------------------------------------------------
//  ENUM : sc_switch
//
//  Enumeration of switch states.
// ----------------------------------------------------------------------------

enum sc_switch
{
    SC_OFF,
    SC_ON
};


const std::string to_string( sc_switch );


inline
::std::ostream&
operator << ( ::std::ostream& os, sc_switch sw )
{
    return os << to_string( sw );
}


// ----------------------------------------------------------------------------
//  ENUM : sc_fmt
//
//  Enumeration of formats for character string conversion.
// ----------------------------------------------------------------------------

enum sc_fmt
{
    SC_F,       // fixed
    SC_E        // scientific
};


const std::string to_string( sc_fmt );


inline
::std::ostream&
operator << ( ::std::ostream& os, sc_fmt fmt )
{
    return os << to_string( fmt );
}


// ----------------------------------------------------------------------------
//  Built-in & default fixed-point type parameter values.
// ----------------------------------------------------------------------------

const int       SC_BUILTIN_WL_     = 32;
const int       SC_BUILTIN_IWL_    = 32;
const sc_q_mode SC_BUILTIN_Q_MODE_ = SC_TRN;
const sc_o_mode SC_BUILTIN_O_MODE_ = SC_WRAP;
const int       SC_BUILTIN_N_BITS_ = 0;


const int       SC_DEFAULT_WL_     = SC_BUILTIN_WL_;
const int       SC_DEFAULT_IWL_    = SC_BUILTIN_IWL_;
const sc_q_mode SC_DEFAULT_Q_MODE_ = SC_BUILTIN_Q_MODE_;
const sc_o_mode SC_DEFAULT_O_MODE_ = SC_BUILTIN_O_MODE_;
const int       SC_DEFAULT_N_BITS_ = SC_BUILTIN_N_BITS_;


// ----------------------------------------------------------------------------
//  Built-in & default fixed-point cast switch parameter values.
// ----------------------------------------------------------------------------

const sc_switch SC_BUILTIN_CAST_SWITCH_ = SC_ON;


const sc_switch SC_DEFAULT_CAST_SWITCH_ = SC_BUILTIN_CAST_SWITCH_;


// ----------------------------------------------------------------------------
//  Built-in & default fixed-point value type parameter values.
// ----------------------------------------------------------------------------

const int SC_BUILTIN_DIV_WL_ = 64;
const int SC_BUILTIN_CTE_WL_ = 64;
const int SC_BUILTIN_MAX_WL_ = 1024;


#if defined( SC_FXDIV_WL ) && ( SC_FXDIV_WL > 0 )
const int SC_DEFAULT_DIV_WL_ = SC_FXDIV_WL;
#else
const int SC_DEFAULT_DIV_WL_ = SC_BUILTIN_DIV_WL_;
#endif

#if defined( SC_FXCTE_WL ) && ( SC_FXCTE_WL > 0 )
const int SC_DEFAULT_CTE_WL_ = SC_FXCTE_WL;
#else
const int SC_DEFAULT_CTE_WL_ = SC_BUILTIN_CTE_WL_;
#endif

#if defined( SC_FXMAX_WL ) && ( SC_FXMAX_WL > 0 || SC_FXMAX_WL == -1 )
const int SC_DEFAULT_MAX_WL_ = SC_FXMAX_WL;
#else
const int SC_DEFAULT_MAX_WL_ = SC_BUILTIN_MAX_WL_;
#endif


// ----------------------------------------------------------------------------
//  Dedicated error reporting and checking.
// ----------------------------------------------------------------------------

#ifdef DEBUG_SYSTEMC
#define SC_ASSERT_(cnd,msg)                                                   \
{                                                                             \
    if( ! (cnd) )                                                             \
        SC_REPORT_ERROR( sc_core::SC_ID_INTERNAL_ERROR_, msg );                        \
}
#else
#define SC_ASSERT_(cnd,msg)
#endif

#define SC_ERROR_IF_(cnd,id)                                                  \
{                                                                             \
    if( cnd )                                                                 \
        SC_REPORT_ERROR( id, 0 );                                             \
}


#define SC_CHECK_WL_(wl)                                                      \
    SC_ERROR_IF_( (wl) <= 0, sc_core::SC_ID_INVALID_WL_ )

#define SC_CHECK_N_BITS_(n_bits)                                              \
    SC_ERROR_IF_( (n_bits) < 0, sc_core::SC_ID_INVALID_N_BITS_ )

#define SC_CHECK_DIV_WL_(div_wl)                                              \
    SC_ERROR_IF_( (div_wl) <= 0, sc_core::SC_ID_INVALID_DIV_WL_ )

#define SC_CHECK_CTE_WL_(cte_wl)                                              \
    SC_ERROR_IF_( (cte_wl) <= 0, sc_core::SC_ID_INVALID_CTE_WL_ )

#define SC_CHECK_MAX_WL_(max_wl)                                              \
    SC_ERROR_IF_( (max_wl) <= 0 && (max_wl) != -1,                            \
            sc_core::SC_ID_INVALID_MAX_WL_ )


// ----------------------------------------------------------------------------
//  Generic observer macros.
// ----------------------------------------------------------------------------

#define SC_OBSERVER_(object,observer_type,event)                              \
{                                                                             \
    if( (object).observer() != 0 )                                            \
    {                                                                         \
        observer_type observer = (object).lock_observer();                    \
        observer->event( (object) );                                          \
        (object).unlock_observer( observer );                                 \
    }                                                                         \
}

#define SC_OBSERVER_DEFAULT_(observer_type)                                   \
{                                                                             \
    if( m_observer == 0 && observer_type ## ::default_observer != 0 )         \
        m_observer = (* ## observer_type ## ::default_observer)();            \
}

} // namespace sc_dt


#endif

// Taf!