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Code Issues Releases Wiki Activity

Allow SearchStack to link an EvalInfo object

Browse source 
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;
reduction = Depth(0);
eval = VALUE_NONE;
evalInfo = NULL;
}
void SearchStack::initKillers() {
@ -1375,14 +1376,15 @@ namespace {
const int FutilityValueMargin = 112 * bitScanReverse32(int(depth) * int(depth) / 2);
// Evaluate the position statically
if (isCheck)
ss[ply].eval = VALUE_NONE;
else
if (!isCheck)
{
if (tte && (tte->type() & VALUE_TYPE_EVAL))
staticValue = value_from_tt(tte->value(), ply);
else
{
staticValue = evaluate(pos, ei, threadID);
ss[ply].evalInfo = &ei;
}
ss[ply].eval = staticValue;
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
/// search thread has its own array of SearchStack objects, indexed by the
/// current ply.
struct EvalInfo;
struct SearchStack {
Move pv[PLY_MAX_PLUS_2];
@ -56,6 +57,7 @@ struct SearchStack {
Move killers[KILLER_MAX];
Depth reduction;
Value eval;
EvalInfo* evalInfo;
void init(int ply);
void initKillers();