sc_logic.cc revision 12854
1/***************************************************************************** 2 3 Licensed to Accellera Systems Initiative Inc. (Accellera) under one or 4 more contributor license agreements. See the NOTICE file distributed 5 with this work for additional information regarding copyright ownership. 6 Accellera licenses this file to you under the Apache License, Version 2.0 7 (the "License"); you may not use this file except in compliance with the 8 License. You may obtain a copy of the License at 9 10 http://www.apache.org/licenses/LICENSE-2.0 11 12 Unless required by applicable law or agreed to in writing, software 13 distributed under the License is distributed on an "AS IS" BASIS, 14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 15 implied. See the License for the specific language governing 16 permissions and limitations under the License. 17 18 *****************************************************************************/ 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. 33 34 Name, Affiliation, Date: 35 Description of Modification: 36 37 *****************************************************************************/ 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("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("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("sc_logic value 'Z' cannot be converted to bool", 0); 92 } else { 93 SC_REPORT_WARNING("sc_logic value 'X' cannot be converted to bool", 0); 94 } 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