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Micro-optimze extension()

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Explicitly write the conditions for pawn to 7th
and passed pawn instead of wrapping in redundant
helpers.

Also retire the now unused move_is_pawn_push_to_7th()
and the never used move_was_passed_pawn_push() and
move_is_deep_pawn_push()

Function extension() is so time critical that this
simple patch speeds up the pgo compile of 0.5% and
it is also more clear what actually happens there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-08-24 17:41:24 +01:00
parent 2078878376
commit e217407450
2 changed files with 3 additions and 26 deletions
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24
src/position.h
View file

@ -236,10 +236,7 @@ public:
bool move_is_check(Move m) const;
bool move_is_check(Move m, Bitboard dcCandidates) const;
bool move_is_capture(Move m) const;
bool move_is_deep_pawn_push(Move m) const;
bool move_is_pawn_push_to_7th(Move m) const;
bool move_is_passed_pawn_push(Move m) const;
bool move_was_passed_pawn_push(Move m) const;
bool move_attacks_square(Move m, Square s) const;
// Information about pawns
@ -653,20 +650,6 @@ inline Phase Position::game_phase() const {
return Phase(((npm - EndgameLimit) * 128) / (MidgameLimit - EndgameLimit));
}
inline bool Position::move_is_deep_pawn_push(Move m) const {
Color c = side_to_move();
return piece_on(move_from(m)) == piece_of_color_and_type(c, PAWN)
&& relative_rank(c, move_to(m)) > RANK_4;
}
inline bool Position::move_is_pawn_push_to_7th(Move m) const {
Color c = side_to_move();
return piece_on(move_from(m)) == piece_of_color_and_type(c, PAWN)
&& relative_rank(c, move_to(m)) == RANK_7;
}
inline bool Position::move_is_passed_pawn_push(Move m) const {
Color c = side_to_move();
@ -674,13 +657,6 @@ inline bool Position::move_is_passed_pawn_push(Move m) const {
&& pawn_is_passed(c, move_to(m));
}
inline bool Position::move_was_passed_pawn_push(Move m) const {
Color c = opposite_color(side_to_move());
return piece_on(move_to(m)) == piece_of_color_and_type(c, PAWN)
&& pawn_is_passed(c, move_to(m));
}
inline int Position::rule_50_counter() const {
return st->rule50;

5
src/search.cpp
View file

@ -2267,12 +2267,13 @@ namespace {
if (pos.type_of_piece_on(move_from(m)) == PAWN)
{
if (pos.move_is_pawn_push_to_7th(m))
Color c = pos.side_to_move();
if (relative_rank(c, move_to(m)) == RANK_7)
{
result += PawnPushTo7thExtension[pvNode];
*dangerous = true;
}
if (pos.move_is_passed_pawn_push(m))
if (pos.pawn_is_passed(c, move_to(m)))
{
result += PassedPawnExtension[pvNode];
*dangerous = true;