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Code Issues Releases Wiki Activity

Allow SearchStack to link an EvalInfo object

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This will allow to have wider access to attack
information, for instance from MovePicker.

Note that 'eval' field become obsolete, it is kept
just becasue when we get a position score from TT
we update 'eval' even without an EvalInfo object.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2010-01-18 10:01:49 +01:00
parent 419c5b69ca
commit b833c8247a
2 changed files with 7 additions and 3 deletions
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8
src/search.cpp
View file

@ -653,6 +653,7 @@ void SearchStack::init(int ply) {
currentMove = threatMove = MOVE_NONE; currentMove = threatMove = MOVE_NONE;
reduction = Depth(0); reduction = Depth(0);
eval = VALUE_NONE; eval = VALUE_NONE;
evalInfo = NULL;
} }
void SearchStack::initKillers() { void SearchStack::initKillers() {
@ -1375,14 +1376,15 @@ namespace {
const int FutilityValueMargin = 112 * bitScanReverse32(int(depth) * int(depth) / 2); const int FutilityValueMargin = 112 * bitScanReverse32(int(depth) * int(depth) / 2);
// Evaluate the position statically // Evaluate the position statically
if (isCheck) if (!isCheck)
ss[ply].eval = VALUE_NONE;
else
{ {
if (tte && (tte->type() & VALUE_TYPE_EVAL)) if (tte && (tte->type() & VALUE_TYPE_EVAL))
staticValue = value_from_tt(tte->value(), ply); staticValue = value_from_tt(tte->value(), ply);
else else
{
staticValue = evaluate(pos, ei, threadID); staticValue = evaluate(pos, ei, threadID);
ss[ply].evalInfo = &ei;
}
ss[ply].eval = staticValue; ss[ply].eval = staticValue;
futilityValue = staticValue + FutilityValueMargin; futilityValue = staticValue + FutilityValueMargin;

2
src/search.h
View file

@ -47,6 +47,7 @@ const int KILLER_MAX = 2;
/// from nodes shallower and deeper in the tree during the search. Each /// from nodes shallower and deeper in the tree during the search. Each
/// search thread has its own array of SearchStack objects, indexed by the /// search thread has its own array of SearchStack objects, indexed by the
/// current ply. /// current ply.
struct EvalInfo;
struct SearchStack { struct SearchStack {
Move pv[PLY_MAX_PLUS_2]; Move pv[PLY_MAX_PLUS_2];
@ -56,6 +57,7 @@ struct SearchStack {
Move killers[KILLER_MAX]; Move killers[KILLER_MAX];
Depth reduction; Depth reduction;
Value eval; Value eval;
EvalInfo* evalInfo;
void init(int ply); void init(int ply);
void initKillers(); void initKillers();