2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2009 Marco Costalba
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
38 MaxGain::MaxGain() { clear(); }
41 /// MaxGain::clear() clears the table
43 void MaxGain::clear() {
44 memset(maxStaticValueDelta, 0, 16 * 64 * 64 * sizeof(int));
50 void MaxGain::store(Piece p, Square from, Square to, Value prev, Value curr)
52 if (prev == VALUE_NONE || curr == VALUE_NONE)
55 Value delta = curr - prev;
56 if (delta >= maxStaticValueDelta[p][from][to])
57 maxStaticValueDelta[p][from][to] = delta;
59 maxStaticValueDelta[p][from][to]--;
64 Value MaxGain::retrieve(Piece p, Square from, Square to)
66 return (Value) maxStaticValueDelta[p][from][to];