X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fnnue%2Ffeatures%2Fhalf_ka_v2.cpp;fp=src%2Fnnue%2Ffeatures%2Fhalf_ka_v2.cpp;h=0000000000000000000000000000000000000000;hb=d61d38586ee35fd4d93445eb547e4af27cc86e6b;hp=57f43e50f2ffdc35ea01f32d6030d8eff90236aa;hpb=dabaf2220fe0c77400a5f71a91952f510e6a126b;p=stockfish

diff --git a/src/nnue/features/half_ka_v2.cpp b/src/nnue/features/half_ka_v2.cpp
deleted file mode 100644
index 57f43e50..00000000
--- a/src/nnue/features/half_ka_v2.cpp
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
-  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 HalfKAv2 of NNUE evaluation function
-
-#include "half_ka_v2.h"
-
-#include "../../position.h"
-
-namespace Stockfish::Eval::NNUE::Features {
-
-  // Orient a square according to perspective (rotates by 180 for black)
-  inline Square HalfKAv2::orient(Color perspective, Square s) {
-    return Square(int(s) ^ (bool(perspective) * 56));
-  }
-
-  // Index of a feature for a given king position and another piece on some square
-  inline IndexType HalfKAv2::make_index(Color perspective, Square s, Piece pc, Square ksq) {
-    return IndexType(orient(perspective, s) + PieceSquareIndex[perspective][pc] + PS_NB * ksq);
-  }
-
-  // Get a list of indices for active features
-  void HalfKAv2::append_active_indices(
-    const Position& pos,
-    Color perspective,
-    ValueListInserter<IndexType> active
-  ) {
-    Square ksq = orient(perspective, pos.square<KING>(perspective));
-    Bitboard bb = pos.pieces();
-    while (bb)
-    {
-      Square s = pop_lsb(bb);
-      active.push_back(make_index(perspective, s, pos.piece_on(s), ksq));
-    }
-  }
-
-
-  // append_changed_indices() : get a list of indices for recently changed features
-
-  void HalfKAv2::append_changed_indices(
-    Square ksq,
-    StateInfo* st,
-    Color perspective,
-    ValueListInserter<IndexType> removed,
-    ValueListInserter<IndexType> added
-  ) {
-    const auto& dp = st->dirtyPiece;
-    Square oriented_ksq = orient(perspective, ksq);
-    for (int i = 0; i < dp.dirty_num; ++i) {
-      Piece pc = dp.piece[i];
-      if (dp.from[i] != SQ_NONE)
-        removed.push_back(make_index(perspective, dp.from[i], pc, oriented_ksq));
-      if (dp.to[i] != SQ_NONE)
-        added.push_back(make_index(perspective, dp.to[i], pc, oriented_ksq));
-    }
-  }
-
-  int HalfKAv2::update_cost(StateInfo* st) {
-    return st->dirtyPiece.dirty_num;
-  }
-
-  int HalfKAv2::refresh_cost(const Position& pos) {
-    return pos.count<ALL_PIECES>();
-  }
-
-  bool HalfKAv2::requires_refresh(StateInfo* st, Color perspective) {
-    return st->dirtyPiece.piece[0] == make_piece(perspective, KING);
-  }
-
-}  // namespace Stockfish::Eval::NNUE::Features