From: Marco Costalba <mcostalba@gmail.com>
Date: Sun, 10 Nov 2013 11:00:15 +0000 (+0100)
Subject: Simplify squares_aligned()
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=a518d5d3adf0709471be906fd03ee4744477a214

Simplify squares_aligned()

Use newly introduced LineBB[]

No functional change.
---

diff --git a/src/bitboard.cpp b/src/bitboard.cpp
index 7687cbb4..3683b363 100644
--- a/src/bitboard.cpp
+++ b/src/bitboard.cpp
@@ -227,8 +227,8 @@ void Bitboards::init() {
               for (Square s = s1 + delta; s != s2; s += delta)
                   BetweenBB[s1][s2] |= s;
 
-              PieceType pc = (PseudoAttacks[BISHOP][s1] & s2) ? BISHOP : ROOK;
-              LineBB[s1][s2] = (PseudoAttacks[pc][s1] & PseudoAttacks[pc][s2]) | s1 | s2;
+              PieceType pt = (PseudoAttacks[BISHOP][s1] & s2) ? BISHOP : ROOK;
+              LineBB[s1][s2] = (PseudoAttacks[pt][s1] & PseudoAttacks[pt][s2]) | s1 | s2;
           }
 }
 
diff --git a/src/bitboard.h b/src/bitboard.h
index deba91d5..1dc6f26d 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -227,8 +227,7 @@ inline Bitboard squares_of_color(Square s) {
 /// either on a straight or on a diagonal line.
 
 inline bool squares_aligned(Square s1, Square s2, Square s3) {
-  return  (BetweenBB[s1][s2] | BetweenBB[s1][s3] | BetweenBB[s2][s3])
-        & (     SquareBB[s1] |      SquareBB[s2] |      SquareBB[s3]);
+  return LineBB[s1][s2] & s3;
 }