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Templetize sliding attacks

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No functional change and no speed regression, it seems
to be even a bit faster on MSVC and gcc.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-02-12 16:02:13 +01:00
parent 099b5e45e6
commit 7b4b65d7a9
5 changed files with 43 additions and 59 deletions
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28
src/position.cpp
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@@ -386,8 +386,8 @@ Bitboard Position::attackers_to(Square s, Bitboard occ) const {
return (attacks_from<PAWN>(s, BLACK) & pieces(PAWN, WHITE))
| (attacks_from<PAWN>(s, WHITE) & pieces(PAWN, BLACK))
| (attacks_from<KNIGHT>(s) & pieces(KNIGHT))
| (rook_attacks_bb(s, occ) & pieces(ROOK, QUEEN))
| (bishop_attacks_bb(s, occ) & pieces(BISHOP, QUEEN))
| (attacks_bb<ROOK>(s, occ) & pieces(ROOK, QUEEN))
| (attacks_bb<BISHOP>(s, occ) & pieces(BISHOP, QUEEN))
| (attacks_from<KING>(s) & pieces(KING));
}
@@ -401,9 +401,9 @@ Bitboard Position::attacks_from(Piece p, Square s, Bitboard occ) {
switch (type_of(p))
{
case BISHOP: return bishop_attacks_bb(s, occ);
case ROOK : return rook_attacks_bb(s, occ);
case QUEEN : return bishop_attacks_bb(s, occ) | rook_attacks_bb(s, occ);
case BISHOP: return attacks_bb<BISHOP>(s, occ);
case ROOK : return attacks_bb<ROOK>(s, occ);
case QUEEN : return attacks_bb<BISHOP>(s, occ) | attacks_bb<ROOK>(s, occ);
default : return StepAttacksBB[p][s];
}
}
@@ -434,8 +434,8 @@ bool Position::move_attacks_square(Move m, Square s) const {
return true;
// Scan for possible X-ray attackers behind the moved piece
xray = (rook_attacks_bb(s, occ) & pieces(ROOK, QUEEN, color_of(piece)))
|(bishop_attacks_bb(s, occ) & pieces(BISHOP, QUEEN, color_of(piece)));
xray = (attacks_bb<ROOK>(s, occ) & pieces(ROOK, QUEEN, color_of(piece)))
|(attacks_bb<BISHOP>(s, occ) & pieces(BISHOP, QUEEN, color_of(piece)));
// Verify attackers are triggered by our move and not already existing
return xray && (xray ^ (xray & attacks_from<QUEEN>(s)));
@@ -475,8 +475,8 @@ bool Position::pl_move_is_legal(Move m, Bitboard pinned) const {
b ^= capsq;
b |= to;
return !(rook_attacks_bb(ksq, b) & pieces(ROOK, QUEEN, them))
&& !(bishop_attacks_bb(ksq, b) & pieces(BISHOP, QUEEN, them));
return !(attacks_bb<ROOK>(ksq, b) & pieces(ROOK, QUEEN, them))
&& !(attacks_bb<BISHOP>(ksq, b) & pieces(BISHOP, QUEEN, them));
}
// If the moving piece is a king, check whether the destination
@@ -684,8 +684,8 @@ bool Position::move_gives_check(Move m, const CheckInfo& ci) const {
b ^= from;
b ^= capsq;
b |= to;
return (rook_attacks_bb(ksq, b) & pieces(ROOK, QUEEN, us))
||(bishop_attacks_bb(ksq, b) & pieces(BISHOP, QUEEN, us));
return (attacks_bb<ROOK>(ksq, b) & pieces(ROOK, QUEEN, us))
||(attacks_bb<BISHOP>(ksq, b) & pieces(BISHOP, QUEEN, us));
}
// Castling with check ?
@@ -707,7 +707,7 @@ bool Position::move_gives_check(Move m, const CheckInfo& ci) const {
b ^= rfrom;
b |= rto;
b |= kto;
return rook_attacks_bb(rto, b) & ksq;
return attacks_bb<ROOK>(rto, b) & ksq;
}
return false;
@@ -1301,8 +1301,8 @@ int Position::see(Move m) const {
// and scan for new X-ray attacks behind the attacker.
b = stmAttackers & pieces(pt);
occ ^= (b & (~b + 1));
attackers |= (rook_attacks_bb(to, occ) & pieces(ROOK, QUEEN))
| (bishop_attacks_bb(to, occ) & pieces(BISHOP, QUEEN));
attackers |= (attacks_bb<ROOK>(to, occ) & pieces(ROOK, QUEEN))
| (attacks_bb<BISHOP>(to, occ) & pieces(BISHOP, QUEEN));
attackers &= occ; // Cut out pieces we've already done