// partial_insertion_sort() sorts moves in descending order up to and including
// a given limit. The order of moves smaller than the limit is left unspecified.
- // To keep the implementation simple, *begin is always included in the sorted moves.
void partial_insertion_sort(ExtMove* begin, ExtMove* end, int limit) {
- for (ExtMove *sortedEnd = begin + 1, *p = begin + 1; p < end; ++p)
+ for (ExtMove *sortedEnd = begin, *p = begin + 1; p < end; ++p)
if (p->value >= limit)
{
ExtMove tmp = *p, *q;
- *p = *sortedEnd;
- for (q = sortedEnd; q != begin && *(q-1) < tmp; --q)
- *q = *(q-1);
+ *p = *++sortedEnd;
+ for (q = sortedEnd; q != begin && *(q - 1) < tmp; --q)
+ *q = *(q - 1);
*q = tmp;
- ++sortedEnd;
}
}
template<>
void MovePicker::score<QUIETS>() {
- const HistoryStats& history = pos.this_thread()->history;
+ const ButterflyHistory& history = pos.this_thread()->history;
- const CounterMoveStats& cmh = *(ss-1)->counterMoves;
- const CounterMoveStats& fmh = *(ss-2)->counterMoves;
- const CounterMoveStats& fm2 = *(ss-4)->counterMoves;
+ const PieceToHistory& cmh = *(ss-1)->history;
+ const PieceToHistory& fmh = *(ss-2)->history;
+ const PieceToHistory& fm2 = *(ss-4)->history;
Color c = pos.side_to_move();
m.value = cmh[pos.moved_piece(m)][to_sq(m)]
+ fmh[pos.moved_piece(m)][to_sq(m)]
+ fm2[pos.moved_piece(m)][to_sq(m)]
- + history.get(c, m);
+ + history[c][from_to(m)];
}
template<>
void MovePicker::score<EVASIONS>() {
// Try captures ordered by MVV/LVA, then non-captures ordered by stats heuristics
- const HistoryStats& history = pos.this_thread()->history;
+ const ButterflyHistory& history = pos.this_thread()->history;
Color c = pos.side_to_move();
for (auto& m : *this)
if (pos.capture(m))
m.value = PieceValue[MG][pos.piece_on(to_sq(m))]
- - Value(type_of(pos.moved_piece(m))) + HistoryStats::Max;
+ - Value(type_of(pos.moved_piece(m))) + (1 << 28);
else
- m.value = history.get(c, m);
+ m.value = history[c][from_to(m)];
}
move = pick_best(cur++, endMoves);
if (move != ttMove)
{
- if (pos.see_ge(move, VALUE_ZERO))
+ if (pos.see_ge(move))
return move;
// Losing capture, move it to the beginning of the array