64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2025, Parallax Software, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software.
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//
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// Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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//
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// This notice may not be removed or altered from any source distribution.
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#pragma once
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#include "SdcClass.hh"
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#include "GraphClass.hh"
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#include "SearchClass.hh"
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#include "StaState.hh"
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namespace sta {
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typedef Set<FuncExpr*> FuncExprSet;
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class GatedClk : public StaState
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{
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public:
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GatedClk(const StaState *sta);
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bool isGatedClkEnable(Vertex *vertex) const;
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void isGatedClkEnable(Vertex *enable_vertex,
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bool &is_gated_clk_enable,
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const Pin *&clk_pin,
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LogicValue &logic_active_value) const;
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void gatedClkEnables(Vertex *clk_vertex,
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// Return value.
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PinSet &enable_pins);
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RiseFall *gatedClkActiveTrans(LogicValue active_value,
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const MinMax *min_max) const;
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protected:
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void isClkGatingFunc(FuncExpr *func,
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LibertyPort *enable_port,
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LibertyPort *clk_port,
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bool &is_clk_gate,
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LogicValue &logic_value) const;
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void functionClkOperands(FuncExpr *root_expr,
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FuncExpr *curr_expr,
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FuncExprSet &funcs) const;
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};
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} // namespace
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