Micro-optimize last_1() for 32bits

[stockfish] / src / misc.cpp

diff --git a/src/misc.cpp b/src/misc.cpp
index 8bc413f47be9657217ce0151a0604702f3b100c0..0f0fca46624da7c0212b2971c72b0d8a02c2eae8 100644 (file)
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -17,25 +17,6 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#if defined(_WIN32) || defined(_WIN64)
-
-#define NOMINMAX // disable macros min() and max()
-#include <windows.h>
-
-#else
-
-#  include <unistd.h>
-#  if defined(__hpux)
-#     include <sys/pstat.h>
-#  endif
-
-#endif
-
-#if !defined(NO_PREFETCH)
-#  include <xmmintrin.h>
-#endif
-
-#include <algorithm>
 #include <iomanip>
 #include <iostream>
 #include <sstream>
@@ -43,6 +24,10 @@
 #include "misc.h"
 #include "thread.h"
 
+#if defined(__hpux)
+#    include <sys/pstat.h>
+#endif
+
 using namespace std;
 
 /// Version number. If Version is left empty, then Tag plus current
@@ -66,17 +51,15 @@ const string engine_info(bool to_uci) {
   string month, day, year;
   stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008"
 
+  s << "Stockfish " << Version;
+
   if (Version.empty())
   {
       date >> month >> day >> year;
 
-      s << "Stockfish " << Tag
-        << setfill('0') << " " << year.substr(2)
-        << setw(2) << (1 + months.find(month) / 4)
-        << setw(2) << day;
+      s << Tag << setfill('0') << " " << year.substr(2)
+        << setw(2) << (1 + months.find(month) / 4) << setw(2) << day;
   }
-  else
-      s << "Stockfish " << Version;
 
   s << cpu64 << popcnt << (to_uci ? "\nid author ": " by ")
     << "Tord Romstad, Marco Costalba and Joona Kiiski";
@@ -174,16 +157,16 @@ int cpu_count() {
 #if defined(_WIN32) || defined(_WIN64)
   SYSTEM_INFO s;
   GetSystemInfo(&s);
-  return std::min(int(s.dwNumberOfProcessors), MAX_THREADS);
+  return s.dwNumberOfProcessors;
 #else
 
 #  if defined(_SC_NPROCESSORS_ONLN)
-  return std::min((int)sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS);
+  return sysconf(_SC_NPROCESSORS_ONLN);
 #  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);
+  return psd.psd_proc_cnt;
 #  else
   return 1;
 #  endif
@@ -220,6 +203,8 @@ void prefetch(char*) {}
 
 #else
 
+#   include <xmmintrin.h>
+
 void prefetch(char* addr) {
 
 #  if defined(__INTEL_COMPILER) || defined(__ICL)