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Code Issues Releases Wiki Activity

Retire evaluate_mobility()

Browse source 
Move the code to the caller and also move mob_area
computation out of evaluate_pieces(). It is more clear
the code flow and it is also faster.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-11-11 21:17:38 +01:00
parent 8e96149c8c
commit ad44ff2bca
1 changed files with 32 additions and 43 deletions
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75
src/evaluate.cpp
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@ -515,35 +515,6 @@ void read_weights(Color us) {
namespace {
// evaluate_mobility() computes mobility and attacks for every piece
template<PieceType Piece, Color Us, bool HasPopCnt>
int evaluate_mobility(Bitboard b, Bitboard mob_area, EvalInfo& ei) {
const Color Them = (Us == WHITE ? BLACK : WHITE);
// Update attack info
ei.attackedBy[Us][Piece] |= b;
// King attacks
if (b & ei.kingZone[Us])
{
ei.kingAttackersCount[Us]++;
ei.kingAttackersWeight[Us] += AttackWeight[Piece];
Bitboard bb = (b & ei.attackedBy[Them][KING]);
if (bb)
ei.kingAdjacentZoneAttacksCount[Us] += count_1s_max_15<HasPopCnt>(bb);
}
// Mobility
int mob = (Piece != QUEEN ? count_1s_max_15<HasPopCnt>(b & mob_area)
: count_1s<HasPopCnt>(b & mob_area));
ei.mobility += Sign[Us] * MobilityBonus[Piece][mob];
return mob;
}
// evaluate_outposts() evaluates bishop and knight outposts squares
template<PieceType Piece, Color Us>
@ -572,7 +543,7 @@ namespace {
// evaluate_pieces<>() assigns bonuses and penalties to the pieces of a given color
template<PieceType Piece, Color Us, bool HasPopCnt>
void evaluate_pieces(const Position& pos, EvalInfo& ei) {
void evaluate_pieces(const Position& pos, EvalInfo& ei, Bitboard mob_area) {
Bitboard b;
Square s, ksq;
@ -582,9 +553,6 @@ namespace {
const Color Them = (Us == WHITE ? BLACK : WHITE);
const Square* ptr = pos.piece_list_begin(Us, Piece);
// Do not include in mobility squares protected by enemy pawns or occupied by our pieces
const Bitboard mob_area = ~(ei.attackedBy[Them][PAWN] | pos.pieces_of_color(Us));
while ((s = *ptr++) != SQ_NONE)
{
if (Piece == KNIGHT || Piece == QUEEN)
@ -596,8 +564,24 @@ namespace {
else
assert(false);
// Attacks and mobility
mob = evaluate_mobility<Piece, Us, HasPopCnt>(b, mob_area, ei);
// Update attack info
ei.attackedBy[Us][Piece] |= b;
// King attacks
if (b & ei.kingZone[Us])
{
ei.kingAttackersCount[Us]++;
ei.kingAttackersWeight[Us] += AttackWeight[Piece];
Bitboard bb = (b & ei.attackedBy[Them][KING]);
if (bb)
ei.kingAdjacentZoneAttacksCount[Us] += count_1s_max_15<HasPopCnt>(bb);
}
// Mobility
mob = (Piece != QUEEN ? count_1s_max_15<HasPopCnt>(b & mob_area)
: count_1s<HasPopCnt>(b & mob_area));
ei.mobility += Sign[Us] * MobilityBonus[Piece][mob];
// Decrease score if we are attacked by an enemy pawn. Remaining part
// of threat evaluation must be done later when we have full attack info.
@ -711,15 +695,20 @@ namespace {
template<Color Us, bool HasPopCnt>
void evaluate_pieces_of_color(const Position& pos, EvalInfo& ei) {
evaluate_pieces<KNIGHT, Us, HasPopCnt>(pos, ei);
evaluate_pieces<BISHOP, Us, HasPopCnt>(pos, ei);
evaluate_pieces<ROOK, Us, HasPopCnt>(pos, ei);
evaluate_pieces<QUEEN, Us, HasPopCnt>(pos, ei);
const Color Them = (Us == WHITE ? BLACK : WHITE);
// Sum up all attacked squares
ei.attackedBy[Us][0] = ei.attackedBy[Us][PAWN] | ei.attackedBy[Us][KNIGHT]
| ei.attackedBy[Us][BISHOP] | ei.attackedBy[Us][ROOK]
| ei.attackedBy[Us][QUEEN] | ei.attackedBy[Us][KING];
// Do not include in mobility squares protected by enemy pawns or occupied by our pieces
const Bitboard mob_area = ~(ei.attackedBy[Them][PAWN] | pos.pieces_of_color(Us));
evaluate_pieces<KNIGHT, Us, HasPopCnt>(pos, ei, mob_area);
evaluate_pieces<BISHOP, Us, HasPopCnt>(pos, ei, mob_area);
evaluate_pieces<ROOK, Us, HasPopCnt>(pos, ei, mob_area);
evaluate_pieces<QUEEN, Us, HasPopCnt>(pos, ei, mob_area);
// Sum up all attacked squares
ei.attackedBy[Us][0] = ei.attackedBy[Us][PAWN] | ei.attackedBy[Us][KNIGHT]
| ei.attackedBy[Us][BISHOP] | ei.attackedBy[Us][ROOK]
| ei.attackedBy[Us][QUEEN] | ei.attackedBy[Us][KING];
}