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Use pointers instead of array indices in MovePicker

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This avoids calculating the array entry position
at each access and gives another boost of almost 1%.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-08-28 08:57:52 +02:00
parent 6cf28d4aa7
commit 9e4befe3f1
7 changed files with 106 additions and 109 deletions
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12
src/position.cpp
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@@ -1696,7 +1696,7 @@ bool Position::is_mate() const {
MoveStack moves[256];
return is_check() && !generate_evasions(*this, moves, pinned_pieces(sideToMove));
return is_check() && (generate_evasions(*this, moves, pinned_pieces(sideToMove)) == moves);
}
@@ -1716,20 +1716,18 @@ bool Position::has_mate_threat(Color c) {
do_null_move(st1);
MoveStack mlist[120];
int count;
bool result = false;
Bitboard dc = discovered_check_candidates(sideToMove);
Bitboard pinned = pinned_pieces(sideToMove);
// Generate pseudo-legal non-capture and capture check moves
count = generate_non_capture_checks(*this, mlist, dc);
count += generate_captures(*this, mlist + count);
MoveStack* last = generate_non_capture_checks(*this, mlist, dc);
last = generate_captures(*this, last);
// Loop through the moves, and see if one of them is mate
for (int i = 0; i < count; i++)
for (MoveStack* cur = mlist; cur != last; cur++)
{
Move move = mlist[i].move;
Move move = cur->move;
if (!pl_move_is_legal(move, pinned))
continue;