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Simplify a condition in gives_check() 

Now that aligned() is quite fast we can skip
some logic.

No functional change.
pull/358/head
Marco Costalba 2013-12-01 10:07:16 +01:00
parent 5f2bf91ad1
commit dd4e5db2be
1 changed files with 5 additions and 8 deletions
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13
src/position.cpp
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@ -633,14 +633,11 @@ bool Position::gives_check(Move m, const CheckInfo& ci) const {
if (ci.checkSq[pt] & to) if (ci.checkSq[pt] & to)
return true; return true;
// Discovery check ? // Discovered check ?
if (unlikely(ci.dcCandidates) && (ci.dcCandidates & from)) if ( unlikely(ci.dcCandidates)
{ && (ci.dcCandidates & from)
// For pawn and king moves we need to verify also direction && !aligned(from, to, king_square(~sideToMove)))
if ( (pt != PAWN && pt != KING) return true;
|| !aligned(from, to, king_square(~sideToMove)))
return true;
}
// Can we skip the ugly special cases ? // Can we skip the ugly special cases ?
if (type_of(m) == NORMAL) if (type_of(m) == NORMAL)