C:/systemc-2.2.0/systemc-2.2.0/src/sysc/datatypes/bit/sc_logic.cpp

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

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  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");
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  License at http://www.systemc.org/. Software distributed by Contributors
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  ANY KIND, either express or implied. See the License for the specific
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 *****************************************************************************/

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

  sc_logic.cpp -- C++ implementation of logic type. Behaves
                  pretty much the same way as HDLs logic type.

  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:

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// $Log: sc_logic.cpp,v $
// Revision 1.1.1.1  2006/12/15 20:31:36  acg
// SystemC 2.2
//
// Revision 1.3  2006/01/13 18:53:53  acg
// Andy Goodrich: added $Log command so that CVS comments are reproduced in
// the source.
//

#include "sysc/utils/sc_string.h"
#include "sysc/datatypes/bit/sc_bit_ids.h"
#include "sysc/datatypes/bit/sc_logic.h"


namespace sc_dt
{

// ----------------------------------------------------------------------------
//  CLASS : sc_logic
//
//  Four-valued logic type.
// ----------------------------------------------------------------------------

// support methods

void
sc_logic::invalid_value( sc_logic_value_t v )
{
    char msg[BUFSIZ];
    std::sprintf( msg, "sc_logic( %d )", v );
    SC_REPORT_ERROR( sc_core::SC_ID_VALUE_NOT_VALID_, msg );
}

void
sc_logic::invalid_value( char c )
{
    char msg[BUFSIZ];
    std::sprintf( msg, "sc_logic( '%c' )", c );
    SC_REPORT_ERROR( sc_core::SC_ID_VALUE_NOT_VALID_, msg );
}

void
sc_logic::invalid_value( int i )
{
    char msg[BUFSIZ];
    std::sprintf( msg, "sc_logic( %d )", i );
    SC_REPORT_ERROR( sc_core::SC_ID_VALUE_NOT_VALID_, msg );
}


void
sc_logic::invalid_01() const
{
    if( (int) m_val == Log_Z ) {
        SC_REPORT_WARNING( sc_core::SC_ID_LOGIC_Z_TO_BOOL_, 0 );
    } else {
        SC_REPORT_WARNING( sc_core::SC_ID_LOGIC_X_TO_BOOL_, 0 );
    }
}


// conversion tables

const sc_logic_value_t sc_logic::char_to_logic[128] =
{
    Log_0, Log_1, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_0, Log_1, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
    Log_X, Log_X, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X
};

const char sc_logic::logic_to_char[4] = { '0', '1', 'Z', 'X' };

const sc_logic_value_t sc_logic::and_table[4][4] =
{
    { Log_0, Log_0, Log_0, Log_0 },
    { Log_0, Log_1, Log_X, Log_X },
    { Log_0, Log_X, Log_X, Log_X },
    { Log_0, Log_X, Log_X, Log_X }
};

const sc_logic_value_t sc_logic::or_table[4][4] =
{
    { Log_0, Log_1, Log_X, Log_X },
    { Log_1, Log_1, Log_1, Log_1 },
    { Log_X, Log_1, Log_X, Log_X },
    { Log_X, Log_1, Log_X, Log_X }
};

const sc_logic_value_t sc_logic::xor_table[4][4] =
{
    { Log_0, Log_1, Log_X, Log_X },
    { Log_1, Log_0, Log_X, Log_X },
    { Log_X, Log_X, Log_X, Log_X },
    { Log_X, Log_X, Log_X, Log_X }
};

const sc_logic_value_t sc_logic::not_table[4] =
    { Log_1, Log_0, Log_X, Log_X  };


// other methods

void
sc_logic::scan( ::std::istream& is )
{
    char c;
    is >> c;
    *this = c;
}


// #ifdef SC_DT_DEPRECATED
const sc_logic sc_logic_0( Log_0 );
const sc_logic sc_logic_1( Log_1 );
const sc_logic sc_logic_Z( Log_Z );
const sc_logic sc_logic_X( Log_X );
// #endif

const sc_logic SC_LOGIC_0( Log_0 );
const sc_logic SC_LOGIC_1( Log_1 );
const sc_logic SC_LOGIC_Z( Log_Z );
const sc_logic SC_LOGIC_X( Log_X );

} // namespace sc_dt

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