#include "types.h"
-const Bitboard EmptyBoardBB = 0;
-
-const Bitboard FileABB = 0x0101010101010101ULL;
-const Bitboard FileBBB = FileABB << 1;
-const Bitboard FileCBB = FileABB << 2;
-const Bitboard FileDBB = FileABB << 3;
-const Bitboard FileEBB = FileABB << 4;
-const Bitboard FileFBB = FileABB << 5;
-const Bitboard FileGBB = FileABB << 6;
-const Bitboard FileHBB = FileABB << 7;
-
-const Bitboard Rank1BB = 0xFF;
-const Bitboard Rank2BB = Rank1BB << (8 * 1);
-const Bitboard Rank3BB = Rank1BB << (8 * 2);
-const Bitboard Rank4BB = Rank1BB << (8 * 3);
-const Bitboard Rank5BB = Rank1BB << (8 * 4);
-const Bitboard Rank6BB = Rank1BB << (8 * 5);
-const Bitboard Rank7BB = Rank1BB << (8 * 6);
-const Bitboard Rank8BB = Rank1BB << (8 * 7);
-
extern Bitboard SquaresByColorBB[2];
extern Bitboard FileBB[8];
extern Bitboard NeighboringFilesBB[8];
}
-/// neighboring_files_bb takes a file or a square as input and returns a
-/// bitboard representing all squares on the neighboring files.
+/// neighboring_files_bb takes a file as input and returns a bitboard representing
+/// all squares on the neighboring files.
inline Bitboard neighboring_files_bb(File f) {
return NeighboringFilesBB[f];
}
-inline Bitboard neighboring_files_bb(Square s) {
- return NeighboringFilesBB[file_of(s)];
-}
-
-/// this_and_neighboring_files_bb takes a file or a square as input and returns
-/// a bitboard representing all squares on the given and neighboring files.
+/// this_and_neighboring_files_bb takes a file as input and returns a bitboard
+/// representing all squares on the given and neighboring files.
inline Bitboard this_and_neighboring_files_bb(File f) {
return ThisAndNeighboringFilesBB[f];
}
-inline Bitboard this_and_neighboring_files_bb(Square s) {
- return ThisAndNeighboringFilesBB[file_of(s)];
-}
-
/// in_front_bb() takes a color and a rank or square as input, and returns a
/// bitboard representing all the squares on all ranks in front of the rank
#if defined(IS_64BIT)
-inline Bitboard rook_attacks_bb(Square s, Bitboard occ) {
- return RAttacks[s][((occ & RMasks[s]) * RMagics[s]) >> RShifts[s]];
+FORCE_INLINE unsigned rook_index(Square s, Bitboard occ) {
+ return unsigned(((occ & RMasks[s]) * RMagics[s]) >> RShifts[s]);
}
-inline Bitboard bishop_attacks_bb(Square s, Bitboard occ) {
- return BAttacks[s][((occ & BMasks[s]) * BMagics[s]) >> BShifts[s]];
+FORCE_INLINE unsigned bishop_index(Square s, Bitboard occ) {
+ return unsigned(((occ & BMasks[s]) * BMagics[s]) >> BShifts[s]);
}
#else // if !defined(IS_64BIT)
-inline Bitboard rook_attacks_bb(Square s, Bitboard occ) {
+FORCE_INLINE unsigned rook_index(Square s, Bitboard occ) {
Bitboard b = occ & RMasks[s];
- return RAttacks[s]
- [unsigned(int(b) * int(RMagics[s]) ^ int(b >> 32) * int(RMagics[s] >> 32)) >> RShifts[s]];
+ return unsigned(int(b) * int(RMagics[s]) ^ int(b >> 32) * int(RMagics[s] >> 32)) >> RShifts[s];
}
-inline Bitboard bishop_attacks_bb(Square s, Bitboard occ) {
+FORCE_INLINE unsigned bishop_index(Square s, Bitboard occ) {
Bitboard b = occ & BMasks[s];
- return BAttacks[s]
- [unsigned(int(b) * int(BMagics[s]) ^ int(b >> 32) * int(BMagics[s] >> 32)) >> BShifts[s]];
+ return unsigned(int(b) * int(BMagics[s]) ^ int(b >> 32) * int(BMagics[s] >> 32)) >> BShifts[s];
}
-
#endif
+inline Bitboard rook_attacks_bb(Square s, Bitboard occ) {
+ return RAttacks[s][rook_index(s, occ)];
+}
+
+inline Bitboard bishop_attacks_bb(Square s, Bitboard occ) {
+ return BAttacks[s][bishop_index(s, occ)];
+}
+
inline Bitboard queen_attacks_bb(Square s, Bitboard blockers) {
return rook_attacks_bb(s, blockers) | bishop_attacks_bb(s, blockers);
}
extern void print_bitboard(Bitboard b);
-extern void init_bitboards();
+extern void bitboards_init();
#endif // !defined(BITBOARD_H_INCLUDED)