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Introduce operator~(Piece c)

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Small syntactic sugar to reverse piece color.

No functional change.
This commit is contained in:
Marco Costalba 2013-06-09 12:43:12 +02:00
parent 7e95495b35
commit db4cd89cb8
3 changed files with 11 additions and 7 deletions
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12
src/position.cpp
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@ -85,17 +85,17 @@ void init() {
side = rk.rand<Key>();
exclusion = rk.rand<Key>();
for (PieceType pt = PAWN; pt <= KING; pt++)
for (Piece pc = W_PAWN; pc <= W_KING; pc++)
{
PieceValue[MG][make_piece(BLACK, pt)] = PieceValue[MG][pt];
PieceValue[EG][make_piece(BLACK, pt)] = PieceValue[EG][pt];
PieceValue[MG][~pc] = PieceValue[MG][pc];
PieceValue[EG][~pc] = PieceValue[EG][pc];
Score v = make_score(PieceValue[MG][pt], PieceValue[EG][pt]);
Score v = make_score(PieceValue[MG][pc], PieceValue[EG][pc]);
for (Square s = SQ_A1; s <= SQ_H8; s++)
{
pieceSquareTable[make_piece(WHITE, pt)][ s] = (v + PSQT[pt][s]);
pieceSquareTable[make_piece(BLACK, pt)][~s] = -(v + PSQT[pt][s]);
pieceSquareTable[ pc][ s] = (v + PSQT[pc][s]);
pieceSquareTable[~pc][~s] = -(v + PSQT[pc][s]);
}
}
}

2
src/psqtab.h
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@ -25,7 +25,7 @@
#define S(mg, eg) make_score(mg, eg)
/// PSQT[PieceType][Square] contains Piece-Square scores. For each piece type on
/// PSQT[Piece][Square] contains Piece-Square scores. For each piece type on
/// a given square a (midgame, endgame) score pair is assigned. PSQT is defined
/// for white side, for black side the tables are symmetric.

4
src/types.h
View file

@ -359,6 +359,10 @@ inline Square operator~(Square s) {
return Square(s ^ 56); // Vertical flip SQ_A1 -> SQ_A8
}
inline Piece operator~(Piece c) {
return Piece(c ^ 8);
}
inline Square operator|(File f, Rank r) {
return Square((r << 3) | f);
}