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

  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_nbdefs.h -- Top level header file for arbitrary precision signed/unsigned
                 arithmetic. This file defines all the constants needed.

  Original Author: Ali Dasdan, Synopsys, Inc.
  
 *****************************************************************************/

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

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

      Name, Affiliation, Date:
  Description of Modification:

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


// $Log: sc_nbdefs.cpp,v $
// Revision 1.3  2011/02/18 20:19:15  acg
//  Andy Goodrich: updating Copyright notice.
//
// Revision 1.2  2009/05/22 16:06:29  acg
//  Andy Goodrich: process control updates.
//
// Revision 1.1.1.1  2006/12/15 20:20:05  acg
// SystemC 2.3
//
// Revision 1.3  2006/01/13 18:49:32  acg
// Added $Log command so that CVS check in comments are reproduced in the
// source.
//

#include "sysc/datatypes/int/sc_nbdefs.h"


namespace sc_dt
{

#ifdef SC_MAX_NBITS
const int MAX_NDIGITS      = DIV_CEIL(SC_MAX_NBITS) + 2;
// Consider a number with x bits another with y bits. The maximum
// number of bits happens when we multiply them. The result will have
// (x + y) bits. Assume that x + y <= SC_MAX_NBITS. Then, DIV_CEIL(x) +
// DIV_CEIL(y) <= DIV_CEIL(SC_MAX_NBITS) + 2. This is the reason for +2
// above. With this change, MAX_NDIGITS must be enough to hold the
// result of any operation.
#endif

// Support for the long long type. This type is not in the standard
// but is usually supported by compilers.
#if !defined(_WIN32) || defined(__MINGW32__)
const uint64 UINT64_ZERO   = 0ULL;
const uint64 UINT64_ONE    = 1ULL;
const uint64 UINT64_32ONES = 0x00000000ffffffffULL;
#else
const uint64 UINT64_ZERO   = 0i64;
const uint64 UINT64_ONE    = 1i64;
const uint64 UINT64_32ONES = 0x00000000ffffffffi64;
#endif

const small_type NB_DEFAULT_BASE = SC_DEC;

#ifndef _32BIT_
const uint64 UINT_ZERO = UINT64_ZERO;
const uint64 UINT_ONE  = UINT64_ONE;
#else
const unsigned int UINT_ZERO = 0U;
const unsigned int UINT_ONE  = 1U;
#endif

} // namespace sc_dt