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Retire DirectionTable[]

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With this patch even word 'direction' is disappeared !

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-12-27 00:13:10 +01:00
parent 4dded4e72f
commit e7ab3a0d16
3 changed files with 28 additions and 53 deletions
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14
src/bitboard.h
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@@ -90,7 +90,6 @@ extern Bitboard RookPseudoAttacks[64];
extern Bitboard QueenPseudoAttacks[64];
extern uint8_t BitCount8Bit[256];
extern int8_t DirectionTable[64][64];
////
@@ -302,17 +301,8 @@ inline Bitboard attack_span_mask(Color c, Square s) {
/// either on a straight or on a diagonal line.
inline bool squares_aligned(Square s1, Square s2, Square s3) {
return DirectionTable[s1][s2] != DELTA_NONE
&& abs(DirectionTable[s1][s2]) == abs(DirectionTable[s2][s3]);
}
/// squares_straight_aligned returns true if the squares s1 and s2 are aligned
/// on a straight line, either veritical or horizontal.
inline bool squares_straight_aligned(Square s1, Square s2) {
return abs(DirectionTable[s1][s2]) == DELTA_N
|| abs(DirectionTable[s1][s2]) == DELTA_E;
return (BetweenBB[s1][s2] | BetweenBB[s1][s3] | BetweenBB[s2][s3])
& ((1ULL << s1) | (1ULL << s2) | (1ULL << s3));
}