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Remove a few file_of's (simplify adjacent_files_bb) #2171

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This is a non-functional simplification that removes two file_of(s).

STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 22030 W: 5106 L: 4984 D: 11940
http://tests.stockfishchess.org/tests/view/5cf028de0ebc5925cf0839e7
This commit is contained in:
protonspring 2019-06-09 06:31:16 -06:00 • committed by Marco Costalba
parent 5935daf8a5
commit 14e23d520f
2 changed files with 5 additions and 6 deletions
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8
src/bitboard.h
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@ -184,8 +184,8 @@ constexpr Bitboard pawn_double_attacks_bb(Bitboard b) {
/// adjacent_files_bb() returns a bitboard representing all the squares on the
/// adjacent files of the given one.
inline Bitboard adjacent_files_bb(File f) {
return shift<EAST>(file_bb(f)) | shift<WEST>(file_bb(f));
inline Bitboard adjacent_files_bb(Square s) {
return shift<EAST>(file_bb(s)) | shift<WEST>(file_bb(s));
}
@ -221,7 +221,7 @@ inline Bitboard forward_file_bb(Color c, Square s) {
/// starting from the given square.
inline Bitboard pawn_attack_span(Color c, Square s) {
return forward_ranks_bb(c, s) & adjacent_files_bb(file_of(s));
return forward_ranks_bb(c, s) & adjacent_files_bb(s);
}
@ -229,7 +229,7 @@ inline Bitboard pawn_attack_span(Color c, Square s) {
/// the given color and on the given square is a passed pawn.
inline Bitboard passed_pawn_span(Color c, Square s) {
return forward_ranks_bb(c, s) & (adjacent_files_bb(file_of(s)) | file_bb(s));
return forward_ranks_bb(c, s) & (adjacent_files_bb(s) | file_bb(s));
}

3
src/pawns.cpp
View file

@ -87,7 +87,6 @@ namespace {
{
assert(pos.piece_on(s) == make_piece(Us, PAWN));
File f = file_of(s);
Rank r = relative_rank(Us, s);
e->pawnAttacksSpan[Us] |= pawn_attack_span(Us, s);
@ -98,7 +97,7 @@ namespace {
lever = theirPawns & PawnAttacks[Us][s];
leverPush = theirPawns & PawnAttacks[Us][s + Up];
doubled = ourPawns & (s - Up);
neighbours = ourPawns & adjacent_files_bb(f);
neighbours = ourPawns & adjacent_files_bb(s);
phalanx = neighbours & rank_bb(s);
support = neighbours & rank_bb(s - Up);