kate/BadFish
1
0
Fork 0
mirror of https://github.com/sockspls/badfish synced 2025-05-02 09:39:36 +00:00
Code Issues Releases Wiki Activity

Simplify distance (#2109)

Browse source 
Only called with Squares as argument, so remove unused variants.

As this is just syntax changes, only verified bench at high depth.

No functional change.
This commit is contained in:
Joost VandeVondele 2019-04-18 16:53:52 +02:00 • committed by Marco Costalba
parent c4fc00ec49
commit f21b503982
2 changed files with 5 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
src/bitboard.h
View file

@ -237,15 +237,13 @@ inline bool aligned(Square s1, Square s2, Square s3) {
/// distance() functions return the distance between x and y, defined as the
/// number of steps for a king in x to reach y. Works with squares, ranks, files.
/// number of steps for a king in x to reach y.
template<typename T> inline int distance(T x, T y) { return std::abs(x - y); }
template<typename T1 = Square> inline int distance(Square x, Square y);
template<> inline int distance<File>(Square x, Square y) { return std::abs(file_of(x) - file_of(y)); }
template<> inline int distance<Rank>(Square x, Square y) { return std::abs(rank_of(x) - rank_of(y)); }
template<> inline int distance<Square>(Square x, Square y) { return SquareDistance[x][y]; }
template<typename T1, typename T2> inline int distance(T2 x, T2 y);
template<> inline int distance<File>(Square x, Square y) { return distance(file_of(x), file_of(y)); }
template<> inline int distance<Rank>(Square x, Square y) { return distance(rank_of(x), rank_of(y)); }
template<class T> constexpr const T& clamp(const T& v, const T& lo, const T& hi) {
return v < lo ? lo : v > hi ? hi : v;
}

4
src/endgame.cpp
View file

@ -635,8 +635,6 @@ ScaleFactor Endgame<KBPPKB>::operator()(const Position& pos) const {
Square ksq = pos.square<KING>(weakSide);
Square psq1 = pos.squares<PAWN>(strongSide)[0];
Square psq2 = pos.squares<PAWN>(strongSide)[1];
Rank r1 = rank_of(psq1);
Rank r2 = rank_of(psq2);
Square blockSq1, blockSq2;
if (relative_rank(strongSide, psq1) > relative_rank(strongSide, psq2))
@ -670,7 +668,7 @@ ScaleFactor Endgame<KBPPKB>::operator()(const Position& pos) const {
&& opposite_colors(ksq, wbsq)
&& ( bbsq == blockSq2
|| (pos.attacks_from<BISHOP>(blockSq2) & pos.pieces(weakSide, BISHOP))
|| distance(r1, r2) >= 2))
|| distance<Rank>(psq1, psq2) >= 2))
return SCALE_FACTOR_DRAW;
else if ( ksq == blockSq2