Bitbase index() from ADD to OR.

No functional change. Resolves #132
official-stockfish · Nov 25, 2014 · fe07ae4 · fe07ae4
1 parent 2c52147
commit fe07ae4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/bitbase.cpp b/src/bitbase.cpp
@@ -41,7 +41,7 @@ namespace {
  // bit 13-14: white pawn file (from FILE_A to FILE_D)
  // bit 15-17: white pawn RANK_7 - rank (from RANK_7 - RANK_7 to RANK_7 - RANK_2)
  unsigned index(Color us, Square bksq, Square wksq, Square psq) {
- return wksq + (bksq << 6) + (us << 12) + (file_of(psq) << 13) + ((RANK_7 - rank_of(psq)) << 15);
+ return wksq | (bksq << 6) | (us << 12) | (file_of(psq) << 13) | ((RANK_7 - rank_of(psq)) << 15);
  }
 
  enum Result {