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Code Issues Releases Wiki Activity

Movepick: add and use find_best_index() helper

Browse source 
This removes a bunch of redundant code.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2008-10-17 08:25:39 +02:00
parent 06d6468ce9
commit cf8ee79b76
2 changed files with 27 additions and 38 deletions
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64
src/movepick.cpp
View file

@ -73,11 +73,11 @@ MovePicker::MovePicker(const Position& p, bool pvnode, Move ttm, Move mk,
numOfBadCaptures = 0;
dc = p.discovered_check_candidates(p.side_to_move());
if(p.is_check())
if (p.is_check())
phaseIndex = EvasionsPhaseIndex;
else if(depth > Depth(0))
else if (depth > Depth(0))
phaseIndex = MainSearchPhaseIndex;
else if(depth == Depth(0))
else if (depth == Depth(0))
phaseIndex = QsearchWithChecksPhaseIndex;
else
phaseIndex = QsearchWithoutChecksPhaseIndex;
@ -273,6 +273,23 @@ void MovePicker::score_qcaptures() {
}
/// find_best_index() loops across the moves and returns index of
/// the highest scored one.
int MovePicker::find_best_index() {
int bestScore = -10000000, bestIndex = -1;
for (int i = movesPicked; i < numOfMoves; i++)
if (moves[i].score > bestScore)
{
bestIndex = i;
bestScore = moves[i].score;
}
return bestIndex;
}
/// MovePicker::pick_move_from_list() picks the move with the biggest score
/// from a list of generated moves (moves[] or badCaptures[], depending on
/// the current move generation phase). It takes care not to return the
@ -283,7 +300,6 @@ void MovePicker::score_qcaptures() {
Move MovePicker::pick_move_from_list() {
int bestScore = -10000000;
int bestIndex;
Move move;
@ -294,7 +310,7 @@ Move MovePicker::pick_move_from_list() {
assert(movesPicked >= 0);
while (movesPicked < numOfMoves)
{
bestScore = -10000000;
int bestScore = -10000000;
bestIndex = -1;
for (int i = movesPicked; i < numOfMoves; i++)
{
@ -305,7 +321,7 @@ Move MovePicker::pick_move_from_list() {
badCaptures[numOfBadCaptures++] = moves[i];
moves[i--] = moves[--numOfMoves];
}
else if (moves[i].score > bestScore)
else if (moves[i].score > bestScore) // FIXME >= 0 ??
{
bestIndex = i;
bestScore = moves[i].score;
@ -332,18 +348,7 @@ Move MovePicker::pick_move_from_list() {
// the entire move list for the best move. If many moves have already
// been searched and it is not a PV node, we are probably failing low
// anyway, so we just pick the first move from the list.
if (pvNode || movesPicked < 12)
{
bestScore = -10000000;
bestIndex = -1;
for (int i = movesPicked; i < numOfMoves; i++)
if(moves[i].score > bestScore)
{
bestIndex = i;
bestScore = moves[i].score;
}
} else
bestIndex = movesPicked;
bestIndex = (pvNode || movesPicked < 12 ? find_best_index() : movesPicked);
if (bestIndex != -1)
{
@ -362,14 +367,7 @@ Move MovePicker::pick_move_from_list() {
assert(movesPicked >= 0);
while (movesPicked < numOfMoves)
{
bestScore = -10000000;
bestIndex = -1;
for (int i = movesPicked; i < numOfMoves; i++)
if (moves[i].score > bestScore)
{
bestIndex = i;
bestScore = moves[i].score;
}
bestIndex = find_best_index();
if (bestIndex != -1)
{
@ -400,18 +398,8 @@ Move MovePicker::pick_move_from_list() {
assert(movesPicked >= 0);
while (movesPicked < numOfMoves)
{
bestScore = -10000000;
if (movesPicked < 4) // FIXME makes sens to score qcaps?
{
bestIndex = -1;
for (int i = movesPicked; i < numOfMoves; i++)
if(moves[i].score > bestScore)
{
bestIndex = i;
bestScore = moves[i].score;
}
} else
bestIndex = movesPicked;
// FIXME makes sens to score qcaps?
bestIndex = (movesPicked < 4 ? find_best_index() : movesPicked);
if (bestIndex != -1)
{

1
src/movepick.h
View file

@ -75,6 +75,7 @@ private:
void score_evasions();
void score_qcaptures();
Move pick_move_from_list();
int find_best_index();
const Position& pos;
Move ttMove, mateKiller, killer1, killer2;