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Diffstat (limited to 'src/systemc/dt/bit/sc_logic.cc')
| -rw-r--r-- | src/systemc/dt/bit/sc_logic.cc | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/systemc/dt/bit/sc_logic.cc b/src/systemc/dt/bit/sc_logic.cc new file mode 100644 index 000000000..81663fcee --- /dev/null +++ b/src/systemc/dt/bit/sc_logic.cc @@ -0,0 +1,166 @@ +/***************************************************************************** + + 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_logic.cpp -- C++ implementation of logic type. Behaves + pretty much the same way as HDLs logic type. + + Original Author: Stan Y. Liao, Synopsys, Inc. + + *****************************************************************************/ + +/***************************************************************************** + + MODIFICATION LOG - modifiers, enter your name, affiliation, date and + changes you are making here. + + Name, Affiliation, Date: + Description of Modification: + + *****************************************************************************/ + + +// $Log: sc_logic.cpp,v $ +// Revision 1.1.1.1 2006/12/15 20:20:04 acg +// SystemC 2.3 +// +// Revision 1.3 2006/01/13 18:53:53 acg +// Andy Goodrich: added $Log command so that CVS comments are reproduced in +// the source. +// + +#include <sstream> + +#include "systemc/ext/dt/bit/sc_logic.hh" +#include "systemc/ext/utils/sc_report_handler.hh" + +namespace sc_dt +{ + +// ---------------------------------------------------------------------------- +// CLASS : sc_logic +// +// Four-valued logic type. +// ---------------------------------------------------------------------------- + +// support methods +void +sc_logic::invalid_value(sc_logic_value_t v) +{ + invalid_value((int)v); +} + +void +sc_logic::invalid_value(char c) +{ + std::stringstream msg; + msg << "sc_logic('" << c << "')"; + SC_REPORT_ERROR("value is not valid", msg.str().c_str()); +} + +void +sc_logic::invalid_value(int i) +{ + std::stringstream msg; + msg << "sc_logic(" << i << ")"; + SC_REPORT_ERROR("value is not valid", msg.str().c_str()); +} + + +void +sc_logic::invalid_01() const +{ + if ((int)m_val == Log_Z) { + SC_REPORT_WARNING("sc_logic value 'Z' cannot be converted to bool", 0); + } else { + SC_REPORT_WARNING("sc_logic value 'X' cannot be converted to bool", 0); + } +} + + +// conversion tables +const sc_logic_value_t sc_logic::char_to_logic[128] = { + Log_0, Log_1, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_0, Log_1, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, Log_X, + Log_X, Log_X, Log_Z, Log_X, Log_X, Log_X, Log_X, Log_X +}; + +const char sc_logic::logic_to_char[4] = { '0', '1', 'Z', 'X' }; + +const sc_logic_value_t sc_logic::and_table[4][4] = { + { Log_0, Log_0, Log_0, Log_0 }, + { Log_0, Log_1, Log_X, Log_X }, + { Log_0, Log_X, Log_X, Log_X }, + { Log_0, Log_X, Log_X, Log_X } +}; + +const sc_logic_value_t sc_logic::or_table[4][4] = { + { Log_0, Log_1, Log_X, Log_X }, + { Log_1, Log_1, Log_1, Log_1 }, + { Log_X, Log_1, Log_X, Log_X }, + { Log_X, Log_1, Log_X, Log_X } +}; + +const sc_logic_value_t sc_logic::xor_table[4][4] = { + { Log_0, Log_1, Log_X, Log_X }, + { Log_1, Log_0, Log_X, Log_X }, + { Log_X, Log_X, Log_X, Log_X }, + { Log_X, Log_X, Log_X, Log_X } +}; + +const sc_logic_value_t sc_logic::not_table[4] = { + Log_1, Log_0, Log_X, Log_X +}; + +// other methods +void +sc_logic::scan(::std::istream &is) +{ + char c; + is >> c; + *this = c; +} + +// #ifdef SC_DT_DEPRECATED +const sc_logic sc_logic_0(Log_0); +const sc_logic sc_logic_1(Log_1); +const sc_logic sc_logic_Z(Log_Z); +const sc_logic sc_logic_X(Log_X); +// #endif + +const sc_logic SC_LOGIC_0(Log_0); +const sc_logic SC_LOGIC_1(Log_1); +const sc_logic SC_LOGIC_Z(Log_Z); +const sc_logic SC_LOGIC_X(Log_X); + +} // namespace sc_dt |