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Retire ScalePawnSpan[]

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Obscure, undocmented and misnamed array. Replace with
the direct formula: it is much more clear what the
code does.

No functional change.

Resolves #90
This commit is contained in:
Marco Costalba 2014-11-01 22:18:15 +01:00 • committed by Joona Kiiski
parent 79fa72f392
commit 42a20920e5
1 changed files with 1 additions and 3 deletions
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4
src/evaluate.cpp
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@ -198,8 +198,6 @@ namespace {
// scores, indexed by a calculated integer number. // scores, indexed by a calculated integer number.
Score KingDanger[128]; Score KingDanger[128];
const int ScalePawnSpan[2] = { 38, 56 };
// apply_weight() weighs score 'v' by weight 'w' trying to prevent overflow // apply_weight() weighs score 'v' by weight 'w' trying to prevent overflow
Score apply_weight(Score v, const Weight& w) { Score apply_weight(Score v, const Weight& w) {
return make_score(mg_value(v) * w.mg / 256, eg_value(v) * w.eg / 256); return make_score(mg_value(v) * w.mg / 256, eg_value(v) * w.eg / 256);
@ -783,7 +781,7 @@ namespace {
else if ( abs(eg_value(score)) <= BishopValueEg else if ( abs(eg_value(score)) <= BishopValueEg
&& ei.pi->pawn_span(strongSide) <= 1 && ei.pi->pawn_span(strongSide) <= 1
&& !pos.pawn_passed(~strongSide, pos.king_square(~strongSide))) && !pos.pawn_passed(~strongSide, pos.king_square(~strongSide)))
sf = ScaleFactor(ScalePawnSpan[ei.pi->pawn_span(strongSide)]); sf = ei.pi->pawn_span(strongSide) ? ScaleFactor(56) : ScaleFactor(38);
} }
// Interpolate between a middlegame and a (scaled by 'sf') endgame score // Interpolate between a middlegame and a (scaled by 'sf') endgame score