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Microptimize pawns info access

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Avoid indirect calling of piece_of_color_and_type(c, PAWN) and its
alias pawns(c) in the pawn evaluation loop, but use the pawns
bitboards accessed only once before entering the loop.

Also explicitly mark functions as static to better self-document.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-07-03 12:28:11 +02:00
parent 5d79af9e0d
commit 48b0d41220
2 changed files with 24 additions and 19 deletions
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14
src/pawns.cpp
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@@ -193,7 +193,7 @@ PawnInfo *PawnInfoTable::get_pawn_info(const Position &pos) {
// Initialize pawn storm scores by giving bonuses for open files
for (File f = FILE_A; f <= FILE_H; f++)
if (pos.file_is_half_open(us, f))
if (Position::file_is_half_open(ourPawns, f))
{
pi->ksStormValue[us] += KStormOpenFileBonus[f];
pi->qsStormValue[us] += QStormOpenFileBonus[f];
@@ -213,9 +213,9 @@ PawnInfo *PawnInfoTable::get_pawn_info(const Position &pos) {
pi->halfOpenFiles[us] &= ~(1 << f);
// Passed, isolated or doubled pawn?
passed = pos.pawn_is_passed(us, s);
isolated = pos.pawn_is_isolated(us, s);
doubled = pos.pawn_is_doubled(us, s);
passed = Position::pawn_is_passed(theirPawns, us, s);
isolated = Position::pawn_is_isolated(ourPawns, s);
doubled = Position::pawn_is_doubled(ourPawns, us, s);
// We calculate kingside and queenside pawn storm
// scores for both colors. These are used when evaluating
@@ -319,7 +319,7 @@ PawnInfo *PawnInfoTable::get_pawn_info(const Position &pos) {
// Test for candidate passed pawn
candidate = !passed
&& pos.file_is_half_open(them, f)
&& Position::file_is_half_open(theirPawns, 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)
>= 0);
@@ -339,7 +339,7 @@ PawnInfo *PawnInfoTable::get_pawn_info(const Position &pos) {
{
mv -= IsolatedPawnMidgamePenalty[f];
ev -= IsolatedPawnEndgamePenalty[f];
if (pos.file_is_half_open(them, f))
if (Position::file_is_half_open(theirPawns, f))
{
mv -= IsolatedPawnMidgamePenalty[f] / 2;
ev -= IsolatedPawnEndgamePenalty[f] / 2;
@@ -354,7 +354,7 @@ PawnInfo *PawnInfoTable::get_pawn_info(const Position &pos) {
{
mv -= BackwardPawnMidgamePenalty[f];
ev -= BackwardPawnEndgamePenalty[f];
if (pos.file_is_half_open(them, f))
if (Position::file_is_half_open(theirPawns, f))
{
mv -= BackwardPawnMidgamePenalty[f] / 2;
ev -= BackwardPawnEndgamePenalty[f] / 2;