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Retire is_dangerous() and inline its content

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No functional change.
This commit is contained in:
Marco Costalba 2012-10-10 08:09:52 +02:00
parent dae843d4d6
commit 46c01b5083
1 changed files with 9 additions and 26 deletions
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35
src/search.cpp
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@ -110,30 +110,6 @@ namespace {
Move do_skill_level(); Move do_skill_level();
string uci_pv(const Position& pos, int depth, Value alpha, Value beta); string uci_pv(const Position& pos, int depth, Value alpha, Value beta);
// is_dangerous() checks whether a move belongs to some classes of known
// 'dangerous' moves so that we avoid to prune it.
FORCE_INLINE bool is_dangerous(const Position& pos, Move m, bool captureOrPromotion) {
// Castle move?
if (type_of(m) == CASTLE)
return true;
// Passed pawn move?
if ( type_of(pos.piece_moved(m)) == PAWN
&& pos.pawn_is_passed(pos.side_to_move(), to_sq(m)))
return true;
// Entering a pawn endgame?
if ( captureOrPromotion
&& type_of(pos.piece_on(to_sq(m))) != PAWN
&& type_of(m) == NORMAL
&& ( pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK)
- PieceValue[Mg][pos.piece_on(to_sq(m))] == VALUE_ZERO))
return true;
return false;
}
} // namespace } // namespace
@ -800,10 +776,17 @@ split_point_start: // At split points actual search starts from here
<< " currmovenumber " << moveCount + PVIdx << sync_endl; << " currmovenumber " << moveCount + PVIdx << sync_endl;
} }
ext = DEPTH_ZERO;
captureOrPromotion = pos.is_capture_or_promotion(move); captureOrPromotion = pos.is_capture_or_promotion(move);
givesCheck = pos.move_gives_check(move, ci); givesCheck = pos.move_gives_check(move, ci);
dangerous = givesCheck || is_dangerous(pos, move, captureOrPromotion); dangerous = givesCheck
ext = DEPTH_ZERO; || pos.is_passed_pawn_push(move)
|| type_of(move) == CASTLE
|| ( captureOrPromotion // Entering a pawn endgame?
&& type_of(pos.piece_on(to_sq(move))) != PAWN
&& type_of(move) == NORMAL
&& ( pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK)
- PieceValue[Mg][pos.piece_on(to_sq(move))] == VALUE_ZERO));
// Step 12. Extend checks and, in PV nodes, also dangerous moves // Step 12. Extend checks and, in PV nodes, also dangerous moves
if (PvNode && dangerous) if (PvNode && dangerous)