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Call apply_weight() only once in passed pawns evaluation

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First accumulate the bonus for each pawn, then call the
not very fast apply_weight().

Should be no functional change apart from rounding issues.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-08-20 09:16:43 +02:00
parent 17d820e248
commit 00469d1798
1 changed files with 9 additions and 5 deletions
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14
src/evaluate.cpp
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@@ -727,11 +727,14 @@ namespace {
const Color Them = (Us == WHITE ? BLACK : WHITE); const Color Them = (Us == WHITE ? BLACK : WHITE);
Score bonus = SCORE_ZERO;
Bitboard squaresToQueen, defendedSquares, unsafeSquares, supportingPawns; Bitboard squaresToQueen, defendedSquares, unsafeSquares, supportingPawns;
Bitboard b = ei.pi->passed_pawns(Us); Bitboard b = ei.pi->passed_pawns(Us);
while (b) if (!b)
{ return;
do {
Square s = pop_1st_bit(&b); Square s = pop_1st_bit(&b);
assert(pos.pawn_is_passed(Us, s)); assert(pos.pawn_is_passed(Us, s));
@@ -806,11 +809,12 @@ namespace {
else if (pos.pieces(ROOK, QUEEN, Them)) else if (pos.pieces(ROOK, QUEEN, Them))
ebonus -= ebonus / 4; ebonus -= ebonus / 4;
} }
bonus += make_score(mbonus, ebonus);
// Add the scores for this pawn to the middle game and endgame eval } while (b);
ei.value += Sign[Us] * apply_weight(make_score(mbonus, ebonus), Weights[PassedPawns]);
} // while // Add the scores to the middle game and endgame eval
ei.value += Sign[Us] * apply_weight(bonus, Weights[PassedPawns]);
} }