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Retire badCaptures[] array in MovePicker

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Use the tail of moves[] array to store bad captures.

No functional change but some move reorder. Verified with old perft.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-09-13 09:49:49 +02:00
parent 4143d00011
commit 42ed488987
2 changed files with 9 additions and 11 deletions
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16
src/movepick.cpp
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@@ -75,7 +75,7 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const History& h,
int searchTT = ttm;
ttMoves[0].move = ttm;
badCaptureThreshold = 0;
lastBadCapture = badCaptures;
badCaptures = moves + 256;
pinned = p.pinned_pieces(pos.side_to_move());
@@ -148,10 +148,10 @@ void MovePicker::go_next_phase() {
return;
case PH_BAD_CAPTURES:
// Bad captures SEE value is already calculated so just sort them
// to get SEE move ordering.
// Bad captures SEE value is already calculated so just pick
// them in order to get SEE move ordering.
curMove = badCaptures;
lastMove = lastBadCapture;
lastMove = moves + 256;
return;
case PH_EVASIONS:
@@ -292,12 +292,10 @@ Move MovePicker::get_next_move() {
if (seeValue >= badCaptureThreshold)
return move;
// Losing capture, move it to the badCaptures[] array, note
// Losing capture, move it to the tail of the array, note
// that move has now been already checked for legality.
assert(int(lastBadCapture - badCaptures) < 63);
lastBadCapture->move = move;
lastBadCapture->score = seeValue;
lastBadCapture++;
(--badCaptures)->move = move;
badCaptures->score = seeValue;
}
break;

4
src/movepick.h
View File

@@ -65,8 +65,8 @@ private:
MoveStack ttMoves[2], killers[2];
int badCaptureThreshold, phase;
const uint8_t* phasePtr;
MoveStack *curMove, *lastMove, *lastGoodNonCapture, *lastBadCapture;
MoveStack moves[256], badCaptures[64];
MoveStack *curMove, *lastMove, *lastGoodNonCapture, *badCaptures;
MoveStack moves[256];
};