74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
// OpenSTA, Static Timing Analyzer
|
|
// Copyright (c) 2020, Parallax Software, Inc.
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
#pragma once
|
|
|
|
#include "DisallowCopyAssign.hh"
|
|
#include "LibertyClass.hh"
|
|
#include "NetworkClass.hh"
|
|
|
|
namespace sta {
|
|
|
|
// Register/Latch
|
|
class Sequential
|
|
{
|
|
public:
|
|
~Sequential();
|
|
bool isLatch() const { return !is_register_; }
|
|
bool isRegister() const { return is_register_; }
|
|
FuncExpr *clock() const { return clock_; }
|
|
FuncExpr *data() const { return data_; }
|
|
FuncExpr *clear() const { return clear_; }
|
|
FuncExpr *preset() const { return preset_; }
|
|
// State of output when clear and preset are both true.
|
|
LogicValue clearPresetOutput() const { return clr_preset_out_; }
|
|
// State of outputInv when clear and preset are both true.
|
|
LogicValue clearPresetOutputInv() const {return clr_preset_out_inv_;}
|
|
LibertyPort *output() const { return output_; }
|
|
LibertyPort *outputInv() const { return output_inv_; }
|
|
|
|
protected:
|
|
// clock/data are:
|
|
// clocked_on/next_state for registers
|
|
// enable/data for latches
|
|
Sequential(bool is_register,
|
|
FuncExpr *clock,
|
|
FuncExpr *data,
|
|
FuncExpr *clear,
|
|
FuncExpr *preset,
|
|
LogicValue clr_preset_out,
|
|
LogicValue clr_preset_out_inv,
|
|
LibertyPort *output,
|
|
LibertyPort *output_inv);
|
|
|
|
bool is_register_;
|
|
FuncExpr *clock_;
|
|
FuncExpr *data_;
|
|
FuncExpr *clear_;
|
|
FuncExpr *preset_;
|
|
LogicValue clr_preset_out_;
|
|
LogicValue clr_preset_out_inv_;
|
|
LibertyPort *output_;
|
|
LibertyPort *output_inv_;
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(Sequential);
|
|
|
|
friend class LibertyCell;
|
|
};
|
|
|
|
} // namespace
|