mirror of
https://github.com/sockspls/badfish
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9b7983a452
The index order in kpp_board_index[][] is reversed to be more optimal for the access pattern STC https://tests.stockfishchess.org/tests/view/5fbd74f967cbf42301d6b24f LLR: 2.93 (-2.94,2.94) {-1.25,0.25} Total: 27504 W: 2686 L: 2607 D: 22211 Ptnml(0-2): 84, 2001, 9526, 2034, 107 closes https://github.com/official-stockfish/Stockfish/pull/3233 No functional change
59 lines
2.3 KiB
C++
59 lines
2.3 KiB
C++
/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2020 The Stockfish developers (see AUTHORS file)
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Stockfish 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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Stockfish 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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//Definition of input features HalfKP of NNUE evaluation function
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#ifndef NNUE_FEATURES_HALF_KP_H_INCLUDED
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#define NNUE_FEATURES_HALF_KP_H_INCLUDED
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#include "../../evaluate.h"
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#include "features_common.h"
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namespace Eval::NNUE::Features {
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// Feature HalfKP: Combination of the position of own king
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// and the position of pieces other than kings
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template <Side AssociatedKing>
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class HalfKP {
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public:
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// Feature name
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static constexpr const char* kName = "HalfKP(Friend)";
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// Hash value embedded in the evaluation file
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static constexpr std::uint32_t kHashValue =
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0x5D69D5B9u ^ (AssociatedKing == Side::kFriend);
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// Number of feature dimensions
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static constexpr IndexType kDimensions =
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static_cast<IndexType>(SQUARE_NB) * static_cast<IndexType>(PS_END);
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// Maximum number of simultaneously active features
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static constexpr IndexType kMaxActiveDimensions = 30; // Kings don't count
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// Trigger for full calculation instead of difference calculation
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static constexpr TriggerEvent kRefreshTrigger = TriggerEvent::kFriendKingMoved;
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// Get a list of indices for active features
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static void AppendActiveIndices(const Position& pos, Color perspective,
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IndexList* active);
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// Get a list of indices for recently changed features
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static void AppendChangedIndices(const Position& pos, const DirtyPiece& dp, Color perspective,
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IndexList* removed, IndexList* added);
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};
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} // namespace Eval::NNUE::Features
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#endif // #ifndef NNUE_FEATURES_HALF_KP_H_INCLUDED
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