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Retire SignedDirectionTable[] and RayBB[]

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Function ray_bb() was used just in one endgame where can
be used squares_in_front_of() instead.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-12-26 11:58:48 +01:00
parent 6080fecf9c
commit f08a6eed0d
5 changed files with 35 additions and 82 deletions
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7
src/endgame.cpp
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@@ -699,11 +699,12 @@ ScaleFactor ScalingFunction<KBPKB>::apply(const Position& pos) const {
return SCALE_FACTOR_ZERO;
else
{
Bitboard ray = ray_bb(pawnSq, (strongerSide == WHITE)? SIGNED_DIR_N : SIGNED_DIR_S);
if (ray & pos.pieces(KING, weakerSide))
Bitboard path = squares_in_front_of(strongerSide, pawnSq);
if (path & pos.pieces(KING, weakerSide))
return SCALE_FACTOR_ZERO;
if ( (pos.attacks_from<BISHOP>(weakerBishopSq) & ray)
if ( (pos.attacks_from<BISHOP>(weakerBishopSq) & path)
&& square_distance(weakerBishopSq, pawnSq) >= 3)
return SCALE_FACTOR_ZERO;
}