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Introduce bitcount.h

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It will be used for POPCNT intrinsics.

For now no bianry and functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-05-21 15:29:28 +02:00
parent 1b0888708d
commit 3376c68f4b
8 changed files with 192 additions and 90 deletions
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5
src/pawns.cpp
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@@ -25,6 +25,7 @@
#include <cassert>
#include <cstring>
#include "bitcount.h"
#include "pawns.h"
#include "position.h"
@@ -329,8 +330,8 @@ 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) & (behind_bb(us, r) | rank_bb(r)) & ourPawns)
- count_1s_max_15(neighboring_files_bb(f) & in_front_bb(us, r) & theirPawns)
&& ( count_1s_max_15<false>(neighboring_files_bb(f) & (behind_bb(us, r) | rank_bb(r)) & ourPawns)
- count_1s_max_15<false>(neighboring_files_bb(f) & in_front_bb(us, r) & theirPawns)
>= 0);
// In order to prevent doubled passed pawns from receiving a too big