68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
/*
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* nextpnr -- Next Generation Place and Route
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*
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* Copyright (C) 2021 Symbiflow Authors
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*
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#ifndef COST_MAP_H
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#define COST_MAP_H
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#include <boost/multi_array.hpp>
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#include <mutex>
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#include "lookahead.capnp.h"
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#include "nextpnr_namespaces.h"
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#include "nextpnr_types.h"
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#include "type_wire.h"
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NEXTPNR_NAMESPACE_BEGIN
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struct Context;
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class CostMap
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{
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public:
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delay_t get_delay(const Context *ctx, WireId src, WireId dst) const;
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void set_cost_map(const Context *ctx, const TypeWirePair &wire_pair,
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const dict<std::pair<int32_t, int32_t>, delay_t> &delays);
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void from_reader(lookahead_storage::CostMap::Reader reader);
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void to_builder(lookahead_storage::CostMap::Builder builder) const;
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private:
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struct CostMapEntry
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{
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boost::multi_array<delay_t, 2> data;
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std::pair<int32_t, int32_t> offset;
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delay_t penalty;
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};
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std::mutex cost_map_mutex_;
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dict<TypeWirePair, CostMapEntry> cost_map_;
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void fill_holes(const Context *ctx, const TypeWirePair &wire_pair, boost::multi_array<delay_t, 2> &matrix,
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delay_t delay_penality);
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std::pair<delay_t, int> get_nearby_cost_entry(const boost::multi_array<delay_t, 2> &matrix, int cx, int cy,
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const BoundingBox &bounds);
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delay_t get_penalty(const boost::multi_array<delay_t, 2> &matrix) const;
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};
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NEXTPNR_NAMESPACE_END
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#endif /* COST_MAP_H */
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