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add sq_line array, bb_sq_aligned3, renamed sq_manh to sq_taxi

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Bruno Raoult
2024-03-11 16:04:45 +01:00
parent 87e7695873
commit d81dca6e23
5 changed files with 112 additions and 19 deletions
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32
src/bitboard.h
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@@ -21,8 +21,6 @@
#include "board.h"
#include "piece.h"
//typedef u64 bitboard_t;
/* mapping square -> bitboard */
extern bitboard_t bb_sq[64];
/* squares between sq1 and sq2, exclusing both */
@@ -30,12 +28,17 @@ extern bitboard_t bb_between_excl[64][64];
/* squares between sq1 and sq2, including sq2 */
extern bitboard_t bb_between[64][64];
/* bb_sqrank[64]: square to rank
/**
* bb_sqrank[64]: square to rank
* bb_sqfile[64]: square to file
* bb_sqdiag[64]: square to diagonal
* bb_sqanti[64]: square to antidiagonal
*/
extern bitboard_t bb_sqrank[64], bb_sqfile[64], bb_sqdiag[64], bb_sqanti[64];
/* line (rank, file, diagonal or anti-diagonal) between two squares */
extern bitboard_t bb_line[64][64];
/* knight and king moves */
extern bitboard_t bb_knight[64], bb_king[64];
@@ -192,17 +195,24 @@ static __always_inline bitboard_t bb_file(int file)
/**
* bb_sq_aligned() - check if two squares are aligned (same file or rank).
* @sq1: square 1
* @sq2: square 2
* @sq1, @sq2: the two squares.
*
* @sq2 is included in return value, to be non zero if the two squares
* are neighbors.
*
* @return: bitboard of squares between @sq1 and @sq2, including @sq2.
* @return: true if @sq1 and @sq2 are on same line, false otherwise.
*/
static __always_inline bitboard_t bb_sq_aligned(square_t sq1, square_t sq2)
static __always_inline bool bb_sq_aligned(square_t sq1, square_t sq2)
{
return bb_between[sq1][sq2];
return bb_line[sq1][sq2];
}
/**
* bb_sq_aligned3() - check if 3 squares are aligned (same file or rank).
* @sq1, @sq2, @sq3: the three squares.
*
* @return: true if @sq1, @sq2, and @sq3 are aligned, false otherwise.
*/
static __always_inline bool bb_sq_aligned3(square_t sq1, square_t sq2, square_t sq3)
{
return bb_line[sq1][sq2] & mask(sq3);
}
/**