small cleanups

[stockfish] / src / movegen.cpp

diff --git a/src/movegen.cpp b/src/movegen.cpp
index a3abcde8d1e8dda3bf46d322ace4e529eafccd23..5787d1743cf27eed0e4b9f0c815ad74e2a638725 100644 (file)
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -213,8 +213,31 @@ namespace {
 
 
   template<Color Us, GenType Type>
-  ExtMove* generate_all(const Position& pos, ExtMove* moveList, Bitboard target) {
+  ExtMove* generate_all(const Position& pos, ExtMove* moveList) {
     constexpr bool Checks = Type == QUIET_CHECKS; // Reduce template instantations
+    Bitboard target;
+
+    switch (Type)
+    {
+        case CAPTURES:
+            target =  pos.pieces(~Us);
+            break;
+        case QUIETS:
+        case QUIET_CHECKS:
+            target = ~pos.pieces();
+            break;
+        case EVASIONS:
+        {
+            Square checksq = lsb(pos.checkers());
+            target = between_bb(pos.square<KING>(Us), checksq) | checksq;
+            break;
+        }
+        case NON_EVASIONS:
+            target = ~pos.pieces(Us);
+            break;
+        default:
+            static_assert(true, "Unsupported type in generate_all()");
+    }
 
     moveList = generate_pawn_moves<Us, Type>(pos, moveList, target);
     moveList = generate_moves<KNIGHT, Checks>(pos, moveList, Us, target);
@@ -255,12 +278,8 @@ ExtMove* generate(const Position& pos, ExtMove* moveList) {
 
   Color us = pos.side_to_move();
 
-  Bitboard target =  Type == CAPTURES     ?  pos.pieces(~us)
-                   : Type == QUIETS       ? ~pos.pieces()
-                   : Type == NON_EVASIONS ? ~pos.pieces(us) : 0;
-
-  return us == WHITE ? generate_all<WHITE, Type>(pos, moveList, target)
-                     : generate_all<BLACK, Type>(pos, moveList, target);
+  return us == WHITE ? generate_all<WHITE, Type>(pos, moveList)
+                     : generate_all<BLACK, Type>(pos, moveList);
 }
 
 // Explicit template instantiations
@@ -293,8 +312,8 @@ ExtMove* generate<QUIET_CHECKS>(const Position& pos, ExtMove* moveList) {
          *moveList++ = make_move(from, pop_lsb(&b));
   }
 
-  return us == WHITE ? generate_all<WHITE, QUIET_CHECKS>(pos, moveList, ~pos.pieces())
-                     : generate_all<BLACK, QUIET_CHECKS>(pos, moveList, ~pos.pieces());
+  return us == WHITE ? generate_all<WHITE, QUIET_CHECKS>(pos, moveList)
+                     : generate_all<BLACK, QUIET_CHECKS>(pos, moveList);
 }
 
 
@@ -325,11 +344,8 @@ ExtMove* generate<EVASIONS>(const Position& pos, ExtMove* moveList) {
       return moveList; // Double check, only a king move can save the day
 
   // Generate blocking evasions or captures of the checking piece
-  Square checksq = lsb(pos.checkers());
-  Bitboard target = between_bb(checksq, ksq) | checksq;
-
-  return us == WHITE ? generate_all<WHITE, EVASIONS>(pos, moveList, target)
-                     : generate_all<BLACK, EVASIONS>(pos, moveList, target);
+  return us == WHITE ? generate_all<WHITE, EVASIONS>(pos, moveList)
+                     : generate_all<BLACK, EVASIONS>(pos, moveList);
 }