HCha/Stockfish
1
0
Fork 0
mirror of https://github.com/HChaZZY/Stockfish.git synced 2025-12-20 09:06:45 +08:00
Code Issues Packages Projects Releases Wiki Activity

Document TTEntry and move layouts

Browse Source 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-03-30 08:29:02 +01:00
parent 9e44a6dba9
commit c6c4713ab2
2 changed files with 31 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
src/move.h
View File

@@ -38,10 +38,22 @@
class Position;
/// A move needs 17 bits to be stored
///
/// bit 0- 5: destination square (from 0 to 63)
/// bit 6-11: origin square (from 0 to 63)
/// bit 12-14: promotion piece type
/// bit 15: en passant flag
/// bit 16: castle flag
///
/// Special cases are MOVE_NONE and MOVE_NULL. We can sneak these in
/// because in any normal move destination square is always different
/// from origin square while MOVE_NONE and MOVE_NULL have the same
/// origin and destination square, 0 and 1 respectively.
enum Move {
MOVE_NONE = 0,
MOVE_NULL = 65,
MOVE_MAX = 0xFFFFFF
MOVE_NULL = 65
};
@@ -56,11 +68,11 @@ struct MoveStack {
////
inline Square move_from(Move m) {
return Square((int(m) >> 6) & 077);
return Square((int(m) >> 6) & 0x3F);
}
inline Square move_to(Move m) {
return Square(m & 077);
return Square(m & 0x3F);
}
inline PieceType move_promotion(Move m) {