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Code Issues Releases Wiki Activity

Implement init_search()

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No functional change

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski 2010-02-07 13:15:39 +02:00 • committed by Marco Costalba
parent 8261f61964
commit 7ae16a193b
3 changed files with 30 additions and 21 deletions
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1
src/application.cpp
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@ -49,6 +49,7 @@ Application::Application() {
Position::init_piece_square_tables();
init_eval(1);
init_bitbases();
init_search();
init_threads();
// Make random number generation less deterministic, for book moves

49
src/search.cpp
View file

@ -527,6 +527,34 @@ bool think(const Position& pos, bool infinite, bool ponder, int side_to_move,
}
/// init_search() is called during startup. It initializes various
/// lookup tables.
void init_search() {
// Init our reduction lookup tables
for (int i = 1; i < 64; i++) // i == depth (OnePly = 1)
for (int j = 1; j < 64; j++) // j == moveNumber
{
double pvRed = 0.5 + log(double(i)) * log(double(j)) / 6.0;
double nonPVRed = 0.5 + log(double(i)) * log(double(j)) / 3.0;
PVReductionMatrix[i][j] = (int8_t) ( pvRed >= 1.0 ? floor( pvRed * int(OnePly)) : 0);
NonPVReductionMatrix[i][j] = (int8_t) (nonPVRed >= 1.0 ? floor(nonPVRed * int(OnePly)) : 0);
}
// Init futility margins array
for (int i = 0; i < 14; i++) // i == depth (OnePly = 2)
for (int j = 0; j < 64; j++) // j == moveNumber
{
FutilityMarginsMatrix[i][j] = (i < 2 ? 0 : 112 * bitScanReverse32(i * i / 2)) - 8 * j; // FIXME: test using log instead of BSR
}
// Init futility move count array
for (int i = 0; i < 32; i++) // i == depth (OnePly = 2)
FutilityMoveCountArray[i] = 3 + (1 << (3 * i / 8));
}
/// init_threads() is called during startup. It launches all helper threads,
/// and initializes the split point stack and the global locks and condition
/// objects.
@ -540,27 +568,6 @@ void init_threads() {
pthread_t pthread[1];
#endif
// Init our reduction lookup tables
for (i = 1; i < 64; i++) // i == depth
for (int j = 1; j < 64; j++) // j == moveNumber
{
double pvRed = 0.5 + log(double(i)) * log(double(j)) / 6.0;
double nonPVRed = 0.5 + log(double(i)) * log(double(j)) / 3.0;
PVReductionMatrix[i][j] = (int8_t) ( pvRed >= 1.0 ? floor( pvRed * int(OnePly)) : 0);
NonPVReductionMatrix[i][j] = (int8_t) (nonPVRed >= 1.0 ? floor(nonPVRed * int(OnePly)) : 0);
}
// Init futility margins array
for (i = 0; i < 14; i++) // i == depth (OnePly = 2)
for (int j = 0; j < 64; j++) // j == moveNumber
{
FutilityMarginsMatrix[i][j] = (i < 2 ? 0 : 112 * bitScanReverse32(i * i / 2)) - 8 * j; // FIXME: test using log instead of BSR
}
// Init futility move count array
for (i = 0; i < 32; i++) // i == depth (OnePly = 2)
FutilityMoveCountArray[i] = 3 + (1 << (3 * i / 8));
for (i = 0; i < THREAD_MAX; i++)
Threads[i].activeSplitPoints = 0;

1
src/search.h
View file

@ -68,6 +68,7 @@ struct SearchStack {
//// Prototypes
////
extern void init_search();
extern void init_threads();
extern void stop_threads();
extern bool think(const Position &pos, bool infinite, bool ponder, int side_to_move,