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In Position backup and restore contiguous data

Browse source 
Give the compiler one more chance to optimize the copy.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-02-20 10:20:08 +01:00
parent 9e1d142fdd
commit 95cfc0e306
2 changed files with 40 additions and 40 deletions
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46
src/position.cpp
View file

@ -678,24 +678,23 @@ bool Position::move_is_capture(Move m) const {
void Position::backup(UndoInfo& u) const {
u.castleRights = castleRights;
u.epSquare = epSquare;
u.checkersBB = checkersBB;
u.key = key;
u.pawnKey = pawnKey;
u.materialKey = materialKey;
u.rule50 = rule50;
u.lastMove = lastMove;
u.mgValue = mgValue;
u.egValue = egValue;
u.capture = NO_PIECE_TYPE;
for (Color c = WHITE; c <= BLACK; c++)
{
u.pinners[c] = pinners[c];
u.pinned[c] = pinned[c];
u.dcCandidates[c] = dcCandidates[c];
}
u.checkersBB = checkersBB;
u.key = key;
u.pawnKey = pawnKey;
u.materialKey = materialKey;
u.castleRights = castleRights;
u.rule50 = rule50;
u.epSquare = epSquare;
u.lastMove = lastMove;
u.mgValue = mgValue;
u.egValue = egValue;
u.capture = NO_PIECE_TYPE;
}
@ -704,24 +703,23 @@ void Position::backup(UndoInfo& u) const {
void Position::restore(const UndoInfo& u) {
castleRights = u.castleRights;
epSquare = u.epSquare;
checkersBB = u.checkersBB;
key = u.key;
pawnKey = u.pawnKey;
materialKey = u.materialKey;
rule50 = u.rule50;
lastMove = u.lastMove;
mgValue = u.mgValue;
egValue = u.egValue;
// u.capture is restored in undo_move()
for (Color c = WHITE; c <= BLACK; c++)
{
pinners[c] = u.pinners[c];
pinned[c] = u.pinned[c];
dcCandidates[c] = u.dcCandidates[c];
}
checkersBB = u.checkersBB;
key = u.key;
pawnKey = u.pawnKey;
materialKey = u.materialKey;
castleRights = u.castleRights;
rule50 = u.rule50;
epSquare = u.epSquare;
lastMove = u.lastMove;
mgValue = u.mgValue;
egValue = u.egValue;
// u.capture is restored in undo_move()
}

34
src/position.h
View file

@ -74,17 +74,16 @@ enum CastleRights {
/// The UndoInfo struct stores information we need to restore a Position
/// object to its previous state when we retract a move. Whenever a move
/// object to its previous state when we retract a move. Whenever a move
/// is made on the board (by calling Position::do_move), an UndoInfo object
/// must be passed as a parameter. When the move is unmade (by calling
/// must be passed as a parameter. When the move is unmade (by calling
/// Position::undo_move), the same UndoInfo object must be passed again.
struct UndoInfo {
int castleRights;
Square epSquare;
Bitboard checkersBB, pinners[2], pinned[2], dcCandidates[2];
Bitboard pinners[2], pinned[2], dcCandidates[2], checkersBB;
Key key, pawnKey, materialKey;
int rule50;
int castleRights, rule50;
Square epSquare;
Move lastMove;
Value mgValue, egValue;
PieceType capture;
@ -326,8 +325,6 @@ private:
// Bitboards
Bitboard byColorBB[2], byTypeBB[8];
Bitboard checkersBB;
mutable Bitboard pinners[2], pinned[2], dcCandidates[2];
// Board
Piece board[64];
@ -340,16 +337,21 @@ private:
int index[64];
// Other info
Color sideToMove;
int castleRights;
File initialKFile, initialKRFile, initialQRFile;
Square epSquare;
Square kingSquare[2];
Move lastMove;
Key key, pawnKey, materialKey, history[MaxGameLength];
int rule50, gamePly;
Value mgValue, egValue;
Color sideToMove;
int gamePly;
Key history[MaxGameLength];
Value npMaterial[2];
File initialKFile, initialKRFile, initialQRFile;
// Info backed up in do_move()
mutable Bitboard pinners[2], pinned[2], dcCandidates[2];
Bitboard checkersBB;
Key key, pawnKey, materialKey;
int castleRights, rule50;
Square epSquare;
Move lastMove;
Value mgValue, egValue;
// Static variables
static int castleRightsMask[64];