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3  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
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6  Accellera licenses this file to you under the Apache License, Version 2.0
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10    http://www.apache.org/licenses/LICENSE-2.0
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12  Unless required by applicable law or agreed to in writing, software
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15  implied.  See the License for the specific language governing
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19
20/*****************************************************************************
21
22  sc_nbdefs.h -- Top level header file for arbitrary precision signed/unsigned
23                 arithmetic. This file defines all the constants needed.
24
25  Original Author: Ali Dasdan, Synopsys, Inc.
26
27 *****************************************************************************/
28
29/*****************************************************************************
30
31  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
32  changes you are making here.
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34      Name, Affiliation, Date:
35  Description of Modification:
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38
39
40// $Log: sc_nbdefs.cpp,v $
41// Revision 1.3  2011/02/18 20:19:15  acg
42//  Andy Goodrich: updating Copyright notice.
43//
44// Revision 1.2  2009/05/22 16:06:29  acg
45//  Andy Goodrich: process control updates.
46//
47// Revision 1.1.1.1  2006/12/15 20:20:05  acg
48// SystemC 2.3
49//
50// Revision 1.3  2006/01/13 18:49:32  acg
51// Added $Log command so that CVS check in comments are reproduced in the
52// source.
53//
54
55#include "sysc/datatypes/int/sc_nbdefs.h"
56
57
58namespace sc_dt
59{
60
61#ifdef SC_MAX_NBITS
62const int MAX_NDIGITS      = DIV_CEIL(SC_MAX_NBITS) + 2;
63// Consider a number with x bits another with y bits. The maximum
64// number of bits happens when we multiply them. The result will have
65// (x + y) bits. Assume that x + y <= SC_MAX_NBITS. Then, DIV_CEIL(x) +
66// DIV_CEIL(y) <= DIV_CEIL(SC_MAX_NBITS) + 2. This is the reason for +2
67// above. With this change, MAX_NDIGITS must be enough to hold the
68// result of any operation.
69#endif
70
71// Support for the long long type. This type is not in the standard
72// but is usually supported by compilers.
73#if !defined(_WIN32) || defined(__MINGW32__)
74const uint64 UINT64_ZERO   = 0ULL;
75const uint64 UINT64_ONE    = 1ULL;
76const uint64 UINT64_32ONES = 0x00000000ffffffffULL;
77#else
78const uint64 UINT64_ZERO   = 0i64;
79const uint64 UINT64_ONE    = 1i64;
80const uint64 UINT64_32ONES = 0x00000000ffffffffi64;
81#endif
82
83const small_type NB_DEFAULT_BASE = SC_DEC;
84
85#ifndef _32BIT_
86const uint64 UINT_ZERO = UINT64_ZERO;
87const uint64 UINT_ONE  = UINT64_ONE;
88#else
89const unsigned int UINT_ZERO = 0U;
90const unsigned int UINT_ONE  = 1U;
91#endif
92
93} // namespace sc_dt
94