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Change zobMaterial[] index 0 definition

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The index at 0 was reserved for no-pieces
information. But we don't need that.

This is a prerequisite for next patch.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2010-05-28 12:21:03 +01:00
parent 8c32878701
commit 03cfd94414
1 changed files with 12 additions and 12 deletions
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24
src/position.cpp
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@ -828,13 +828,13 @@ void Position::do_move(Move m, StateInfo& newSt, const CheckInfo& ci, bool moveI
set_bit(&(byTypeBB[promotion]), to);
board[to] = piece_of_color_and_type(us, promotion);
// Update piece counts
pieceCount[us][promotion]++;
pieceCount[us][PAWN]--;
// Update material key
st->materialKey ^= zobMaterial[us][PAWN][pieceCount[us][PAWN]];
st->materialKey ^= zobMaterial[us][promotion][pieceCount[us][promotion]+1];
// Update piece counts
pieceCount[us][PAWN]--;
pieceCount[us][promotion]++;
st->materialKey ^= zobMaterial[us][promotion][pieceCount[us][promotion]-1];
// Update piece lists, move the last pawn at index[to] position
// and shrink the list. Add a new promotion piece to the list.
@ -932,12 +932,12 @@ void Position::do_capture_move(Key& key, PieceType capture, Color them, Square t
else
st->npMaterial[them] -= piece_value_midgame(capture);
// Update material hash key
st->materialKey ^= zobMaterial[them][capture][pieceCount[them][capture]];
// Update piece count
pieceCount[them][capture]--;
// Update material hash key
st->materialKey ^= zobMaterial[them][capture][pieceCount[them][capture]];
// Update piece list, move the last piece at index[capsq] position
//
// WARNING: This is a not perfectly revresible operation. When we
@ -1598,7 +1598,7 @@ Key Position::compute_material_key() const {
for (PieceType pt = PAWN; pt <= QUEEN; pt++)
{
int count = piece_count(c, pt);
for (int i = 0; i <= count; i++)
for (int i = 0; i < count; i++)
result ^= zobMaterial[c][pt][i];
}
return result;
@ -1755,10 +1755,10 @@ void Position::init_zobrist() {
for (int i = 0; i < 2; i++)
for (int j = 0; j < 8; j++)
for (int k = 0; k < 16; k++)
zobMaterial[i][j][k] = (k > 0)? Key(genrand_int64()) : Key(0LL);
for (int k = 0; k < 8; k++)
zobMaterial[i][j][k] = Key(genrand_int64());
for (int i = 0; i < 16; i++)
for (int i = 0; i < 8; i++)
zobMaterial[0][KING][i] = zobMaterial[1][KING][i] = Key(0ULL);
zobExclusion = genrand_int64();