76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2024, 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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#pragma once
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#include "TimingArc.hh"
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#include "GraphClass.hh"
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#include "SearchClass.hh"
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#include "PathRef.hh"
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#include "StaState.hh"
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namespace sta {
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class PathExpanded
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{
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public:
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PathExpanded(const StaState *sta);
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// Expand path for lookup by index.
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PathExpanded(const Path *path,
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const StaState *sta);
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PathExpanded(const Path *path,
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// Expand generated clk source paths.
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bool expand_genclks,
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const StaState *sta);
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void expand(const Path *path,
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bool expand_genclks);
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size_t size() const { return paths_.size(); }
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// path(0) is the startpoint.
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// path(size()-1) is the endpoint.
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const PathRef *path(size_t index) const;
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TimingArc *prevArc(size_t index);
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// Returns the path start point.
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// Register/Latch Q pin
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// Input pin
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PathRef *startPath();
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PathRef *startPrevPath();
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PathRef *endPath();
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TimingArc *startPrevArc();
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size_t startIndex() const;
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void clkPath(PathRef &clk_path);
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void latchPaths(// Return values.
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PathRef *&d_path,
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PathRef *&q_path,
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Edge *&d_q_edge);
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protected:
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void expandGenclk(PathRef *clk_path);
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// Convert external index that starts at the path root
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// and increases to an index for paths_ (reversed).
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size_t pathsIndex(size_t index) const;
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// The PathRefs in paths_ are in reverse order.
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// paths_[0] is the endpoint.
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// paths_[size-1] is the beginning of the path.
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PathRefSeq paths_;
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TimingArcSeq prev_arcs_;
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// Index of the startpoint.
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size_t start_index_;
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const StaState *sta_;
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};
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} // namespace
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