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Add behind_bb() helper to simplify code logic

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No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2008-12-09 17:39:40 +01:00
parent 67aac4889e
commit 389dc0e83b
2 changed files with 16 additions and 3 deletions
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6
src/pawns.cpp
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@@ -300,7 +300,7 @@ PawnInfo *PawnInfoTable::get_pawn_info(const Position &pos) {
|| isolated
|| chain
|| (pos.pawn_attacks(us, s) & theirPawns)
|| (ourPawns & in_front_bb(them, r) & neighboring_files_bb(f)))
|| (ourPawns & behind_bb(us, r) & neighboring_files_bb(f)))
backward = false;
else
{
@@ -324,8 +324,8 @@ PawnInfo *PawnInfoTable::get_pawn_info(const Position &pos) {
// Test for candidate passed pawn
candidate = !passed
&& pos.file_is_half_open(them, f)
&& ( count_1s_max_15(neighboring_files_bb(f) & (in_front_bb(them, r) | rank_bb(r)) & ourPawns)
- count_1s_max_15(neighboring_files_bb(f) & in_front_bb(us, r) & theirPawns)
&& ( count_1s_max_15(neighboring_files_bb(f) & (behind_bb(us, r) | rank_bb(r)) & ourPawns)
- count_1s_max_15(neighboring_files_bb(f) & in_front_bb(us, r) & theirPawns)
>= 0);
// In order to prevent doubled passed pawns from receiving a too big