+++ /dev/null
-/*
- Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
-
- Stockfish is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Stockfish is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-//Definition of input features HalfKP of NNUE evaluation function
-
-#include "half_kp.h"
-#include "index_list.h"
-
-namespace Stockfish::Eval::NNUE::Features {
-
- // Orient a square according to perspective (rotates by 180 for black)
- inline Square orient(Color perspective, Square s) {
- return Square(int(s) ^ (bool(perspective) * 63));
- }
-
- // Index of a feature for a given king position and another piece on some square
- inline IndexType make_index(Color perspective, Square s, Piece pc, Square ksq) {
- return IndexType(orient(perspective, s) + kpp_board_index[perspective][pc] + PS_END * ksq);
- }
-
- // Get a list of indices for active features
- template <Side AssociatedKing>
- void HalfKP<AssociatedKing>::AppendActiveIndices(
- const Position& pos, Color perspective, IndexList* active) {
-
- Square ksq = orient(perspective, pos.square<KING>(perspective));
- Bitboard bb = pos.pieces() & ~pos.pieces(KING);
- while (bb) {
- Square s = pop_lsb(bb);
- active->push_back(make_index(perspective, s, pos.piece_on(s), ksq));
- }
- }
-
- // Get a list of indices for recently changed features
- template <Side AssociatedKing>
- void HalfKP<AssociatedKing>::AppendChangedIndices(
- const Position& pos, const DirtyPiece& dp, Color perspective,
- IndexList* removed, IndexList* added) {
-
- Square ksq = orient(perspective, pos.square<KING>(perspective));
- for (int i = 0; i < dp.dirty_num; ++i) {
- Piece pc = dp.piece[i];
- if (type_of(pc) == KING) continue;
- if (dp.from[i] != SQ_NONE)
- removed->push_back(make_index(perspective, dp.from[i], pc, ksq));
- if (dp.to[i] != SQ_NONE)
- added->push_back(make_index(perspective, dp.to[i], pc, ksq));
- }
- }
-
- template class HalfKP<Side::kFriend>;
-
-} // namespace Stockfish::Eval::NNUE::Features