subgraph_function_cache.h

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// MIT License
//
// Copyright (c) 2019 Ruhr University Bochum, Chair for Embedded Security. All Rights reserved.
// Copyright (c) 2019 Marc Fyrbiak, Sebastian Wallat, Max Hoffmann ("ORIGINAL AUTHORS"). All rights reserved.
// Copyright (c) 2021 Max Planck Institute for Security and Privacy. All Rights reserved.
// Copyright (c) 2021 Jörn Langheinrich, Julian Speith, Nils Albartus, René Walendy, Simon Klix ("ORIGINAL AUTHORS"). All Rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
 
#pragma once
 
#include "hal_core/defines.h"
#include "hal_core/netlist/boolean_function.h"
 
#include <map>
#include <set>
#include <unordered_set>
#include <utility>
 
namespace hal
{
    class Gate;
    class GatePin;
    class Net;
    class Netlist;
 
    class NETLIST_API SubgraphFunctionCache
    {
    public:
        SubgraphFunctionCache(SubgraphFunctionCache&&)                 = default;
        SubgraphFunctionCache& operator=(SubgraphFunctionCache&&)      = default;
        SubgraphFunctionCache(const SubgraphFunctionCache&)            = delete;
        SubgraphFunctionCache& operator=(const SubgraphFunctionCache&) = delete;
 
        size_t size() const
        {
            return m_functions.size();
        }
 
    private:
        friend class SubgraphNetlistDecorator;
 
        SubgraphFunctionCache(const Netlist* netlist, std::unordered_set<const Gate*> subgraph_gates, std::unordered_set<const Net*> global_inputs)
            : m_netlist(netlist), m_subgraph_gates(std::move(subgraph_gates)), m_global_inputs(std::move(global_inputs))
        {
        }
 
        const Netlist* m_netlist;
        std::unordered_set<const Gate*> m_subgraph_gates;
        std::unordered_set<const Net*> m_global_inputs;
        std::map<std::pair<u32, const GatePin*>, BooleanFunction> m_functions;
        std::map<std::pair<u32, const GatePin*>, std::set<const Net*>> m_inputs;
    };
}    // namespace hal