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Avoid a call to move_is_capture() in extension()

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Pass value as an argument instead or recalculating it.
Altough call is cheap this is a very hot path so with
this patch total time spent for move_is_capture() is almost
halved.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-02-13 20:21:05 +01:00
parent e71d520758
commit f32992f88c
1 changed files with 9 additions and 9 deletions
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18
src/search.cpp
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@ -267,7 +267,7 @@ namespace {
bool connected_moves(const Position &pos, Move m1, Move m2);
bool value_is_mate(Value value);
bool move_is_killer(Move m, const SearchStack& ss);
Depth extension(const Position &pos, Move m, bool pvNode, bool check, bool singleReply, bool mateThreat, bool* dangerous);
Depth extension(const Position &pos, Move m, bool pvNode, bool capture, bool check, bool singleReply, bool mateThreat, bool* dangerous);
bool ok_to_do_nullmove(const Position &pos);
bool ok_to_prune(const Position &pos, Move m, Move threat, Depth d);
bool ok_to_use_TT(const TTEntry* tte, Depth depth, Value beta, int ply);
@ -805,7 +805,7 @@ namespace {
// Decide search depth for this move
bool dangerous;
ext = extension(pos, move, true, pos.move_is_check(move), false, false, &dangerous);
ext = extension(pos, move, true, pos.move_is_capture(move), pos.move_is_check(move), false, false, &dangerous);
newDepth = (Iteration - 2) * OnePly + ext + InitialDepth;
// Make the move, and search it
@ -1009,7 +1009,7 @@ namespace {
// Decide the new search depth
bool dangerous;
Depth ext = extension(pos, move, true, moveIsCheck, singleReply, mateThreat, &dangerous);
Depth ext = extension(pos, move, true, moveIsCapture, moveIsCheck, singleReply, mateThreat, &dangerous);
Depth newDepth = depth - OnePly + ext;
// Make and search the move
@ -1305,7 +1305,7 @@ namespace {
// Decide the new search depth
bool dangerous;
Depth ext = extension(pos, move, false, moveIsCheck, singleReply, mateThreat, &dangerous);
Depth ext = extension(pos, move, false, moveIsCapture, moveIsCheck, singleReply, mateThreat, &dangerous);
Depth newDepth = depth - OnePly + ext;
// Futility pruning
@ -1595,7 +1595,7 @@ namespace {
// Decide the new search depth.
bool dangerous;
Depth ext = extension(pos, move, false, moveIsCheck, false, false, &dangerous);
Depth ext = extension(pos, move, false, moveIsCapture, moveIsCheck, false, false, &dangerous);
Depth newDepth = sp->depth - OnePly + ext;
// Prune?
@ -1713,7 +1713,7 @@ namespace {
// Decide the new search depth.
bool dangerous;
Depth ext = extension(pos, move, true, moveIsCheck, false, false, &dangerous);
Depth ext = extension(pos, move, true, moveIsCapture, moveIsCheck, false, false, &dangerous);
Depth newDepth = sp->depth - OnePly + ext;
// Make and search the move.
@ -2178,7 +2178,7 @@ namespace {
// extended, as example because the corresponding UCI option is set to zero,
// the move is marked as 'dangerous' so, at least, we avoid to prune it.
Depth extension(const Position &pos, Move m, bool pvNode, bool check,
Depth extension(const Position& pos, Move m, bool pvNode, bool capture, bool check,
bool singleReply, bool mateThreat, bool* dangerous) {
assert(m != MOVE_NONE);
@ -2209,7 +2209,7 @@ namespace {
}
}
if ( pos.move_is_capture(m)
if ( capture
&& pos.type_of_piece_on(move_to(m)) != PAWN
&& ( pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK)
- pos.midgame_value_of_piece_on(move_to(m)) == Value(0))
@ -2221,7 +2221,7 @@ namespace {
}
if ( pvNode
&& pos.move_is_capture(m)
&& capture
&& pos.type_of_piece_on(move_to(m)) != PAWN
&& pos.see(m) >= 0)
{