sc_logic.cc revision 13325 
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20/*****************************************************************************
21
22  sc_logic.cpp -- C++ implementation of logic type. Behaves
23                  pretty much the same way as HDLs logic type.
24
25  Original Author: Stan Y. Liao, Synopsys, Inc.
26
27 *****************************************************************************/
28
29/*****************************************************************************
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31  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
32  changes you are making here.
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34      Name, Affiliation, Date:
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38
39
40// $Log: sc_logic.cpp,v $
41// Revision 1.1.1.1  2006/12/15 20:20:04  acg
42// SystemC 2.3
43//
44// Revision 1.3  2006/01/13 18:53:53  acg
45// Andy Goodrich: added $Log command so that CVS comments are reproduced in
46// the source.
47//
48
49#include <sstream>
50
51#include "systemc/ext/dt/bit/messages.hh"
52#include "systemc/ext/dt/bit/sc_logic.hh"
53#include "systemc/ext/utils/sc_report_handler.hh"
54
55namespace sc_dt
56{
57
58// ----------------------------------------------------------------------------
59//  CLASS : sc_logic
60//
61//  Four-valued logic type.
62// ----------------------------------------------------------------------------
63
64// support methods
65void
66sc_logic::invalid_value(sc_logic_value_t v)
67{
68    invalid_value((int)v);
69}
70
71void
72sc_logic::invalid_value(char c)
73{
74    std::stringstream msg;
75    msg << "sc_logic('" << c << "')";
76    SC_REPORT_ERROR(sc_core::SC_ID_VALUE_NOT_VALID_, msg.str().c_str());
77}
78
79void
80sc_logic::invalid_value(int i)
81{
82    std::stringstream msg;
83    msg << "sc_logic(" << i << ")";
84    SC_REPORT_ERROR(sc_core::SC_ID_VALUE_NOT_VALID_, msg.str().c_str());
85}
86
87
88void
89sc_logic::invalid_01() const
90{
91    if ((int)m_val == Log_Z)
92        SC_REPORT_WARNING(sc_core::SC_ID_LOGIC_Z_TO_BOOL_, 0);
93    else
94        SC_REPORT_WARNING(sc_core::SC_ID_LOGIC_X_TO_BOOL_, 0);
95}
96
97
98// conversion tables
99const sc_logic_value_t sc_logic::char_to_logic[128] = {
100    Log_0, Log_1, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X,
101    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
102    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
103    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
104    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
105    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
106    Log_0, Log_1, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
107    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
108    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
109    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
110    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
111    Log_X, Log_X, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X,
112    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
113    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
114    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
115    Log_X, Log_X, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X
116};
117
118const char sc_logic::logic_to_char[4] = { '0', '1', 'Z', 'X' };
119
120const sc_logic_value_t sc_logic::and_table[4][4] = {
121    { Log_0, Log_0, Log_0, Log_0 },
122    { Log_0, Log_1, Log_X, Log_X },
123    { Log_0, Log_X, Log_X, Log_X },
124    { Log_0, Log_X, Log_X, Log_X }
125};
126
127const sc_logic_value_t sc_logic::or_table[4][4] = {
128    { Log_0, Log_1, Log_X, Log_X },
129    { Log_1, Log_1, Log_1, Log_1 },
130    { Log_X, Log_1, Log_X, Log_X },
131    { Log_X, Log_1, Log_X, Log_X }
132};
133
134const sc_logic_value_t sc_logic::xor_table[4][4] = {
135    { Log_0, Log_1, Log_X, Log_X },
136    { Log_1, Log_0, Log_X, Log_X },
137    { Log_X, Log_X, Log_X, Log_X },
138    { Log_X, Log_X, Log_X, Log_X }
139};
140
141const sc_logic_value_t sc_logic::not_table[4] = {
142    Log_1, Log_0, Log_X, Log_X
143};
144
145// other methods
146void
147sc_logic::scan(::std::istream &is)
148{
149    char c;
150    is >> c;
151    *this = c;
152}
153
154// #ifdef SC_DT_DEPRECATED
155const sc_logic sc_logic_0(Log_0);
156const sc_logic sc_logic_1(Log_1);
157const sc_logic sc_logic_Z(Log_Z);
158const sc_logic sc_logic_X(Log_X);
159// #endif
160
161const sc_logic SC_LOGIC_0(Log_0);
162const sc_logic SC_LOGIC_1(Log_1);
163const sc_logic SC_LOGIC_Z(Log_Z);
164const sc_logic SC_LOGIC_X(Log_X);
165
166} // namespace sc_dt
167