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Introduce table SquaresInFrontMask[2][64]

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It will be used to lookup squares in front of
a given square. Same concept of PassedPawnMask[]
and OutpostMask[].

Also small tweaks in bitboard.h

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-04-18 09:45:23 +01:00
parent a49e4fac98
commit 1f1ef0897c
2 changed files with 15 additions and 19 deletions
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2
src/bitboard.cpp
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@@ -226,6 +226,7 @@ Bitboard StepAttackBB[16][64];
Bitboard RayBB[64][8];
Bitboard BetweenBB[64][64];
Bitboard SquaresInFrontMask[2][64];
Bitboard PassedPawnMask[2][64];
Bitboard OutpostMask[2][64];
@@ -427,6 +428,7 @@ namespace {
for (Color c = WHITE; c <= BLACK; c++)
for (Square s = SQ_A1; s <= SQ_H8; s++)
{
SquaresInFrontMask[c][s] = in_front_bb(c, s) & file_bb(s);
PassedPawnMask[c][s] = in_front_bb(c, s) & this_and_neighboring_files_bb(s);
OutpostMask[c][s] = in_front_bb(c, s) & neighboring_files_bb(s);
}