sc_logic.cc revision 13160:1e959d3afc64 
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19
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/*****************************************************************************
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:
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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/sc_logic.hh"
52#include "systemc/ext/utils/sc_report_handler.hh"
53
54namespace sc_dt
55{
56
57// ----------------------------------------------------------------------------
58//  CLASS : sc_logic
59//
60//  Four-valued logic type.
61// ----------------------------------------------------------------------------
62
63// support methods
64void
65sc_logic::invalid_value(sc_logic_value_t v)
66{
67    invalid_value((int)v);
68}
69
70void
71sc_logic::invalid_value(char c)
72{
73    std::stringstream msg;
74    msg << "sc_logic('" << c << "')";
75    SC_REPORT_ERROR("(E204) value is not valid", msg.str().c_str());
76}
77
78void
79sc_logic::invalid_value(int i)
80{
81    std::stringstream msg;
82    msg << "sc_logic(" << i << ")";
83    SC_REPORT_ERROR("(E204) value is not valid", msg.str().c_str());
84}
85
86
87void
88sc_logic::invalid_01() const
89{
90    if ((int)m_val == Log_Z) {
91        SC_REPORT_WARNING(
92                "(W211) sc_logic value 'Z' cannot be converted to bool", 0);
93    } else {
94        SC_REPORT_WARNING(
95                "(W212) sc_logic value 'X' cannot be converted to bool", 0);
96    }
97}
98
99
100// conversion tables
101const sc_logic_value_t sc_logic::char_to_logic[128] = {
102    Log_0, Log_1, Log_Z, 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_X, Log_X, 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_0, Log_1, 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_X, 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_Z, 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_X, Log_X, Log_X, Log_X, Log_X, Log_X,
116    Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X,
117    Log_X, Log_X, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X
118};
119
120const char sc_logic::logic_to_char[4] = { '0', '1', 'Z', 'X' };
121
122const sc_logic_value_t sc_logic::and_table[4][4] = {
123    { Log_0, Log_0, Log_0, Log_0 },
124    { Log_0, Log_1, Log_X, Log_X },
125    { Log_0, Log_X, Log_X, Log_X },
126    { Log_0, Log_X, Log_X, Log_X }
127};
128
129const sc_logic_value_t sc_logic::or_table[4][4] = {
130    { Log_0, Log_1, Log_X, Log_X },
131    { Log_1, Log_1, Log_1, Log_1 },
132    { Log_X, Log_1, Log_X, Log_X },
133    { Log_X, Log_1, Log_X, Log_X }
134};
135
136const sc_logic_value_t sc_logic::xor_table[4][4] = {
137    { Log_0, Log_1, Log_X, Log_X },
138    { Log_1, Log_0, Log_X, Log_X },
139    { Log_X, Log_X, Log_X, Log_X },
140    { Log_X, Log_X, Log_X, Log_X }
141};
142
143const sc_logic_value_t sc_logic::not_table[4] = {
144    Log_1, Log_0, Log_X, Log_X
145};
146
147// other methods
148void
149sc_logic::scan(::std::istream &is)
150{
151    char c;
152    is >> c;
153    *this = c;
154}
155
156// #ifdef SC_DT_DEPRECATED
157const sc_logic sc_logic_0(Log_0);
158const sc_logic sc_logic_1(Log_1);
159const sc_logic sc_logic_Z(Log_Z);
160const sc_logic sc_logic_X(Log_X);
161// #endif
162
163const sc_logic SC_LOGIC_0(Log_0);
164const sc_logic SC_LOGIC_1(Log_1);
165const sc_logic SC_LOGIC_Z(Log_Z);
166const sc_logic SC_LOGIC_X(Log_X);
167
168} // namespace sc_dt
169