HCha/Stockfish
1
0
Fork 0
mirror of https://github.com/HChaZZY/Stockfish.git synced 2025-12-24 02:57:11 +08:00
Code Issues Packages Projects Releases Wiki Activity

Integrate gains table in History

Browse Source 
This will be useful to use gains table in move
ordering along with history table.

No functional change and big code remove.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-01-27 11:19:56 +01:00
parent 54b3d44194
commit f37741cc83
6 changed files with 26 additions and 122 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
src/history.cpp
View File

@@ -42,6 +42,7 @@ History::History() { clear(); }
void History::clear() {
memset(history, 0, 2 * 8 * 64 * sizeof(int));
memset(maxStaticValueDelta, 0, 16 * 64 * 64 * sizeof(int));
}
@@ -94,3 +95,21 @@ int History::move_ordering_score(Piece p, Square to) const {
return history[p][to];
}
/// History::set_gain() and History::gain() store and retrieve the
/// gain of a move given the delta of the static position evaluations
/// before and after the move.
void History::set_gain(Piece p, Square from, Square to, Value delta)
{
if (delta >= maxStaticValueDelta[p][from][to])
maxStaticValueDelta[p][from][to] = delta;
else
maxStaticValueDelta[p][from][to]--;
}
Value History::gain(Piece p, Square from, Square to) const
{
return Value(maxStaticValueDelta[p][from][to]);
}