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Retire ThisAndAdjacentFilesBB[]

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It is unused. Also renamed attack_span_mask to
pawn_attack_span

No functional change.
This commit is contained in:
Marco Costalba
2013-06-23 10:03:48 +02:00
parent 378bcfe760
commit b2fadf32aa
4 changed files with 12 additions and 25 deletions
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8
src/pawns.cpp
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@@ -134,7 +134,7 @@ namespace {
// be backward. If there are friendly pawns behind on adjacent files
// or if can capture an enemy pawn it cannot be backward either.
if ( !(passed | isolated | chain)
&& !(ourPawns & attack_span_mask(Them, s))
&& !(ourPawns & pawn_attack_span(Them, s))
&& !(pos.attacks_from<PAWN>(s, Us) & theirPawns))
{
// We now know that there are no friendly pawns beside or behind this
@@ -153,15 +153,15 @@ namespace {
backward = (b | shift_bb<Up>(b)) & theirPawns;
}
assert(opposed | passed | (attack_span_mask(Us, s) & theirPawns));
assert(opposed | passed | (pawn_attack_span(Us, s) & theirPawns));
// A not passed pawn is a candidate to become passed if it is free to
// advance and if the number of friendly pawns beside or behind this
// pawn on adjacent files is higher or equal than the number of
// enemy pawns in the forward direction on the adjacent files.
candidate = !(opposed | passed | backward | isolated)
&& (b = attack_span_mask(Them, s + pawn_push(Us)) & ourPawns) != 0
&& popcount<Max15>(b) >= popcount<Max15>(attack_span_mask(Us, s) & theirPawns);
&& (b = pawn_attack_span(Them, s + pawn_push(Us)) & ourPawns) != 0
&& popcount<Max15>(b) >= popcount<Max15>(pawn_attack_span(Us, s) & theirPawns);
// Passed pawns will be properly scored in evaluation because we need
// full attack info to evaluate passed pawns. Only the frontmost passed