64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
// OpenSTA, Static Timing Analyzer
|
|
// Copyright (c) 2025, 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/>.
|
|
//
|
|
// The origin of this software must not be misrepresented; you must not
|
|
// claim that you wrote the original software.
|
|
//
|
|
// Altered source versions must be plainly marked as such, and must not be
|
|
// misrepresented as being the original software.
|
|
//
|
|
// This notice may not be removed or altered from any source distribution.
|
|
|
|
#pragma once
|
|
|
|
#include "SdcClass.hh"
|
|
#include "GraphClass.hh"
|
|
#include "SearchClass.hh"
|
|
#include "StaState.hh"
|
|
|
|
namespace sta {
|
|
|
|
typedef Set<FuncExpr*> FuncExprSet;
|
|
|
|
class GatedClk : public StaState
|
|
{
|
|
public:
|
|
GatedClk(const StaState *sta);
|
|
|
|
bool isGatedClkEnable(Vertex *vertex) const;
|
|
void isGatedClkEnable(Vertex *enable_vertex,
|
|
bool &is_gated_clk_enable,
|
|
const Pin *&clk_pin,
|
|
LogicValue &logic_active_value) const;
|
|
void gatedClkEnables(Vertex *clk_vertex,
|
|
// Return value.
|
|
PinSet &enable_pins);
|
|
const RiseFall *gatedClkActiveTrans(LogicValue active_value,
|
|
const MinMax *min_max) const;
|
|
|
|
protected:
|
|
void isClkGatingFunc(FuncExpr *func,
|
|
LibertyPort *enable_port,
|
|
LibertyPort *clk_port,
|
|
bool &is_clk_gate,
|
|
LogicValue &logic_value) const;
|
|
void functionClkOperands(FuncExpr *root_expr,
|
|
FuncExpr *curr_expr,
|
|
FuncExprSet &funcs) const;
|
|
};
|
|
|
|
} // namespace
|