Initialize SearchStack only once at RootMoveList c'tor

[stockfish] / src / bitboard.cpp

diff --git a/src/bitboard.cpp b/src/bitboard.cpp
index cae7e0cae32e2fedf633af09730b631661517252..063204c5020f7ec2f54a5104ee705a618068fc4b 100644 (file)
--- a/src/bitboard.cpp
+++ b/src/bitboard.cpp
@@ -228,7 +228,7 @@ Bitboard BetweenBB[64][64];
 
 Bitboard SquaresInFrontMask[2][64];
 Bitboard PassedPawnMask[2][64];
-Bitboard OutpostMask[2][64];
+Bitboard AttackSpanMask[2][64];
 
 Bitboard BishopPseudoAttacks[64];
 Bitboard RookPseudoAttacks[64];
@@ -373,39 +373,6 @@ Square pop_1st_bit(Bitboard* bb) {
 
 #endif
 
-// Optimized bitScanReverse32() implementation by Pascal Georges. Note
-// that first bit is 1, this allow to differentiate between 0 and 1.
-static CACHE_LINE_ALIGNMENT
-const char MsbTable[256] = {
-  0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5,
-  5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
-  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7,
-  7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-  7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-  7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8
-};
-
-int bitScanReverse32(uint32_t b)
-{
-   int result = 0;
-
-   if (b > 0xFFFF)
-   {
-      b >>= 16;
-      result += 16;
-   }
-   if (b > 0xFF)
-   {
-      b >>= 8;
-      result += 8;
-   }
-   return result + MsbTable[b];
-}
 
 namespace {
 
@@ -430,7 +397,7 @@ namespace {
         {
             SquaresInFrontMask[c][s] = in_front_bb(c, s) & file_bb(s);
             PassedPawnMask[c][s] = in_front_bb(c, s) & this_and_neighboring_files_bb(s);
-            OutpostMask[c][s] = in_front_bb(c, s) & neighboring_files_bb(s);
+            AttackSpanMask[c][s] = in_front_bb(c, s) & neighboring_files_bb(s);
         }
 
     for (Bitboard b = 0ULL; b < 256ULL; b++)