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Use a per-thread array for generated moves

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This greately reduces stack usage and is a
prerequisite for next patch.

Verified with 40K games both in single and SMP
case that there are no regressions.

No functional change.
This commit is contained in:
Marco Costalba
2013-09-26 19:25:50 +02:00
parent 7b2cda95d9
commit 800410eef1
4 changed files with 14 additions and 6 deletions
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9
src/movepick.cpp
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@@ -75,7 +75,7 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats&
assert(d > DEPTH_ZERO);
cur = end = moves;
cur = end = moves = pos.this_thread()->get_moves_array();
endBadCaptures = moves + MAX_MOVES - 1;
countermoves = cm;
ss = s;
@@ -91,10 +91,11 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats&
}
MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats& h,
Square sq) : pos(p), history(h), cur(moves), end(moves) {
Square sq) : pos(p), history(h) {
assert(d <= DEPTH_ZERO);
cur = end = moves = pos.this_thread()->get_moves_array();
if (p.checkers())
stage = EVASION;
@@ -123,10 +124,11 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const HistoryStats&
}
MovePicker::MovePicker(const Position& p, Move ttm, const HistoryStats& h, PieceType pt)
: pos(p), history(h), cur(moves), end(moves) {
: pos(p), history(h) {
assert(!pos.checkers());
cur = end = moves = pos.this_thread()->get_moves_array();
stage = PROBCUT;
// In ProbCut we generate only captures better than parent's captured piece
@@ -139,6 +141,7 @@ MovePicker::MovePicker(const Position& p, Move ttm, const HistoryStats& h, Piece
end += (ttMove != MOVE_NONE);
}
MovePicker::~MovePicker() { pos.this_thread()->free_moves_array(); }
/// score() assign a numerical move ordering score to each move in a move list.
/// The moves with highest scores will be picked first.