Retire DirectionTable[]

[stockfish] / src / bitboard.h

diff --git a/src/bitboard.h b/src/bitboard.h
index 599d0120da852fb4b379d27430a3b174e8055537..6239953e9de2c245c2c866a8a2a5665569c23e54 100644 (file)
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -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));
 }