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