/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2009 Marco Costalba
+ Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-
-////
-//// Includes
-////
-
#if !defined(_MSC_VER)
# include <sys/time.h>
# include <sys/types.h>
# include <unistd.h>
+# if defined(__hpux)
+# include <sys/pstat.h>
+# endif
#else
-/*
- (c) Copyright 1992 Eric Backus
- This software may be used freely so long as this copyright notice is
- left intact. There is no warrantee on this software.
-*/
-# include <windows.h>
-# include <time.h>
-# include "dos.h"
-
-static int gettimeofday(struct timeval* tp, struct timezone*)
-{
- SYSTEMTIME systime;
-
- if (tp)
- {
- struct tm tmrec;
- time_t theTime = time(NULL);
-
- tmrec = *localtime(&theTime);
- tp->tv_sec = mktime(&tmrec);
- GetLocalTime(&systime); /* system time */
-
- tp->tv_usec = systime.wMilliseconds * 1000;
- }
- return 0;
-}
+#define _CRT_SECURE_NO_DEPRECATE
+#define NOMINMAX // disable macros min() and max()
+#include <windows.h>
+#include <sys/timeb.h>
#endif
+#if !defined(NO_PREFETCH)
+# include <xmmintrin.h>
+#endif
+
#include <cassert>
#include <cstdio>
#include <iomanip>
#include <iostream>
#include <sstream>
+#include <algorithm>
+#include "bitcount.h"
#include "misc.h"
+#include "thread.h"
using namespace std;
-/// Version number. If this is left empty, the current date (in the format
-/// YYMMDD) is used as a version number.
+/// Version number. If EngineVersion is left empty, then AppTag plus
+/// current date (in the format YYMMDD) is used as a version number.
-static const string EngineVersion = "";
static const string AppName = "Stockfish";
+static const string EngineVersion = "";
static const string AppTag = "";
-////
-//// Variables
-////
+/// engine_name() returns the full name of the current Stockfish version.
+/// This will be either "Stockfish YYMMDD" (where YYMMDD is the date when
+/// the program was compiled) or "Stockfish <version number>", depending
+/// on whether the constant EngineVersion is empty.
-bool Chess960;
+const string engine_name() {
-uint64_t dbg_cnt0 = 0;
-uint64_t dbg_cnt1 = 0;
+ const string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
+ const string cpu64(CpuIs64Bit ? " 64bit" : "");
-bool dbg_show_mean = false;
-bool dbg_show_hit_rate = false;
+ if (!EngineVersion.empty())
+ return AppName + " " + EngineVersion + cpu64;
+ stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008"
+ string month, day, year;
-////
-//// Functions
-////
+ date >> month >> day >> year;
-void dbg_hit_on(bool b) {
+ s << setfill('0') << AppName + " " + AppTag + " "
+ << year.substr(2, 2) << setw(2)
+ << (1 + months.find(month) / 4) << setw(2)
+ << day << cpu64;
- assert(!dbg_show_mean);
- dbg_show_hit_rate = true;
- dbg_cnt0++;
- if (b)
- dbg_cnt1++;
+ return s.str();
}
-void dbg_hit_on_c(bool c, bool b) {
- if (c)
- dbg_hit_on(b);
-}
+/// Our brave developers! Required by UCI
-void dbg_before() {
+const string engine_authors() {
- assert(!dbg_show_mean);
- dbg_show_hit_rate = true;
- dbg_cnt0++;
+ return "Tord Romstad, Marco Costalba and Joona Kiiski";
}
-void dbg_after() {
- assert(!dbg_show_mean);
- dbg_show_hit_rate = true;
- dbg_cnt1++;
-}
+/// Debug stuff. Helper functions used mainly for debugging purposes
-void dbg_mean_of(int v) {
-
- assert(!dbg_show_hit_rate);
- dbg_show_mean = true;
- dbg_cnt0++;
- dbg_cnt1 += v;
-}
+static uint64_t dbg_hit_cnt0;
+static uint64_t dbg_hit_cnt1;
+static uint64_t dbg_mean_cnt0;
+static uint64_t dbg_mean_cnt1;
void dbg_print_hit_rate() {
- cout << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1
- << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) << endl;
+ if (dbg_hit_cnt0)
+ cerr << "Total " << dbg_hit_cnt0 << " Hit " << dbg_hit_cnt1
+ << " hit rate (%) " << 100 * dbg_hit_cnt1 / dbg_hit_cnt0 << endl;
}
void dbg_print_mean() {
- cout << "Total " << dbg_cnt0 << " Mean "
- << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << endl;
+ if (dbg_mean_cnt0)
+ cerr << "Total " << dbg_mean_cnt0 << " Mean "
+ << (float)dbg_mean_cnt1 / dbg_mean_cnt0 << endl;
}
-void dbg_print_hit_rate(ofstream& logFile) {
+void dbg_mean_of(int v) {
- logFile << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1
- << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) << endl;
+ dbg_mean_cnt0++;
+ dbg_mean_cnt1 += v;
}
-void dbg_print_mean(ofstream& logFile) {
+void dbg_hit_on(bool b) {
- logFile << "Total " << dbg_cnt0 << " Mean "
- << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << endl;
+ dbg_hit_cnt0++;
+ if (b)
+ dbg_hit_cnt1++;
}
-/// engine_name() returns the full name of the current Stockfish version.
-/// This will be either "Stockfish YYMMDD" (where YYMMDD is the date when the
-/// program was compiled) or "Stockfish <version number>", depending on whether
-/// the constant EngineVersion (defined in misc.h) is empty.
+void dbg_hit_on_c(bool c, bool b) { if (c) dbg_hit_on(b); }
+void dbg_before() { dbg_hit_on(false); }
+void dbg_after() { dbg_hit_on(true); dbg_hit_cnt0--; }
-const string engine_name() {
-
- if (!EngineVersion.empty())
- return "Stockfish " + EngineVersion;
- string date(__DATE__); // From compiler, format is "Sep 21 2008"
- string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
+/// get_system_time() returns the current system time, measured in milliseconds
- size_t mon = 1 + months.find(date.substr(0, 3)) / 4;
+int get_system_time() {
- stringstream s;
- string day = (date[4] == ' ' ? date.substr(5, 1) : date.substr(4, 2));
+#if defined(_MSC_VER)
+ struct _timeb t;
+ _ftime(&t);
+ return int(t.time * 1000 + t.millitm);
+#else
+ struct timeval t;
+ gettimeofday(&t, NULL);
+ return t.tv_sec * 1000 + t.tv_usec / 1000;
+#endif
+}
- string name = AppName + " " + AppTag + " ";
- s << name << date.substr(date.length() - 2) << setfill('0')
- << setw(2) << mon << setw(2) << day;
+/// cpu_count() tries to detect the number of CPU cores
- return s.str();
-}
+int cpu_count() {
+#if defined(_MSC_VER)
+ SYSTEM_INFO s;
+ GetSystemInfo(&s);
+ return std::min(int(s.dwNumberOfProcessors), MAX_THREADS);
+#else
-/// get_system_time() returns the current system time, measured in
-/// milliseconds.
+# if defined(_SC_NPROCESSORS_ONLN)
+ return std::min((int)sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS);
+# elif defined(__hpux)
+ struct pst_dynamic psd;
+ if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1)
+ return 1;
+ return std::min((int)psd.psd_proc_cnt, MAX_THREADS);
+# else
+ return 1;
+# endif
-int get_system_time() {
- struct timeval t;
- gettimeofday(&t, NULL);
- return t.tv_sec*1000 + t.tv_usec/1000;
+#endif
}
-/// cpu_count() tries to detect the number of CPU cores.
+/// timed_wait() waits for msec milliseconds. It is mainly an helper to wrap
+/// conversion from milliseconds to struct timespec, as used by pthreads.
-#if !defined(_MSC_VER)
+#if defined(_MSC_VER)
-# if defined(_SC_NPROCESSORS_ONLN)
-int cpu_count() {
- return Min(sysconf(_SC_NPROCESSORS_ONLN), 8);
+void timed_wait(WaitCondition* sleepCond, Lock* sleepLock, int msec) {
+ cond_timedwait(sleepCond, sleepLock, msec);
}
-# else
-int cpu_count() {
- return 1;
-}
-# endif
#else
-int cpu_count() {
- SYSTEM_INFO s;
- GetSystemInfo(&s);
- return Min(s.dwNumberOfProcessors, 8);
+void timed_wait(WaitCondition* sleepCond, Lock* sleepLock, int msec) {
+
+ struct timeval t;
+ struct timespec abstime;
+
+ gettimeofday(&t, NULL);
+
+ abstime.tv_sec = t.tv_sec + (msec / 1000);
+ abstime.tv_nsec = (t.tv_usec + (msec % 1000) * 1000) * 1000;
+
+ if (abstime.tv_nsec > 1000000000LL)
+ {
+ abstime.tv_sec += 1;
+ abstime.tv_nsec -= 1000000000LL;
+ }
+
+ cond_timedwait(sleepCond, sleepLock, &abstime);
}
#endif
-/*
- From Beowulf, from Olithink
-*/
-#ifndef _WIN32
-/* Non-windows version */
-int Bioskey()
-{
- fd_set readfds;
- struct timeval timeout;
-
- FD_ZERO(&readfds);
- FD_SET(fileno(stdin), &readfds);
- /* Set to timeout immediately */
- timeout.tv_sec = 0;
- timeout.tv_usec = 0;
- select(16, &readfds, 0, 0, &timeout);
-
- return (FD_ISSET(fileno(stdin), &readfds));
-}
+/// prefetch() preloads the given address in L1/L2 cache. This is a non
+/// blocking function and do not stalls the CPU waiting for data to be
+/// loaded from memory, that can be quite slow.
+#if defined(NO_PREFETCH)
+
+void prefetch(char*) {}
#else
-/* Windows-version */
-#include <windows.h>
-#include <conio.h>
-int Bioskey()
-{
- static int init = 0,
- pipe;
- static HANDLE inh;
- DWORD dw;
- /* If we're running under XBoard then we can't use _kbhit() as the input
- * commands are sent to us directly over the internal pipe */
-
-#if defined(FILE_CNT)
- if (stdin->_cnt > 0)
- return stdin->_cnt;
+
+void prefetch(char* addr) {
+
+#if defined(__INTEL_COMPILER) || defined(__ICL)
+ // This hack prevents prefetches to be optimized away by
+ // Intel compiler. Both MSVC and gcc seems not affected.
+ __asm__ ("");
#endif
- if (!init) {
- init = 1;
- inh = GetStdHandle(STD_INPUT_HANDLE);
- pipe = !GetConsoleMode(inh, &dw);
- if (!pipe) {
- SetConsoleMode(inh, dw & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT));
- FlushConsoleInputBuffer(inh);
- }
- }
- if (pipe) {
- if (!PeekNamedPipe(inh, NULL, 0, NULL, &dw, NULL))
- return 1;
- return dw;
- } else {
- // Count the number of unread input records, including keyboard,
- // mouse, and window-resizing input records.
- GetNumberOfConsoleInputEvents(inh, &dw);
- if (dw <= 0)
- return 0;
-
- // Read data from console without removing it from the buffer
- INPUT_RECORD rec[256];
- DWORD recCnt;
- if (!PeekConsoleInput(inh, rec, Min(dw, 256), &recCnt))
- return 0;
-
- // Search for at least one keyboard event
- for (DWORD i = 0; i < recCnt; i++)
- if (rec[i].EventType == KEY_EVENT)
- return 1;
-
- return 0;
- }
+
+ _mm_prefetch(addr, _MM_HINT_T2);
+ _mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead
}
+
#endif
projects / stockfish / blobdiff