Revert odd depths razoring

[stockfish] / src / mersenne.cpp

diff --git a/src/mersenne.cpp b/src/mersenne.cpp
index 2213e4ac9f3abc65c06e8c5e9fed04b65702db7e..fee3027fe8f5d47d4c7831e8da2931fbce017e61 100644 (file)
--- a/src/mersenne.cpp
+++ b/src/mersenne.cpp
@@ -1,12 +1,12 @@
-/* 
+/*

    A C-program for MT19937, with initialization improved 2002/1/26.
    Coded by Takuji Nishimura and Makoto Matsumoto.
 
    A C-program for MT19937, with initialization improved 2002/1/26.
    Coded by Takuji Nishimura and Makoto Matsumoto.
 

-   Before using, initialize the state by using init_genrand(seed)  
+   Before using, initialize the state by using init_genrand(seed)

    or init_by_array(init_key, key_length).
 
    Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
    or init_by_array(init_key, key_length).
 
    Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,

-   All rights reserved.                          
+   All rights reserved.

 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions


@@ -19,8 +19,8 @@
         notice, this list of conditions and the following disclaimer in the
         documentation and/or other materials provided with the distribution.
 
         notice, this list of conditions and the following disclaimer in the
         documentation and/or other materials provided with the distribution.
 

-     3. The names of its contributors may not be used to endorse or promote 
-        products derived from this software without specific prior written 
+     3. The names of its contributors may not be used to endorse or promote
+        products derived from this software without specific prior written

         permission.
 
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
         permission.
 
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS


@@ -42,8 +42,9 @@
 */
 
 #include "types.h"
 */
 
 #include "types.h"

+#include "mersenne.h"

 
 

-/* Period parameters */  
+/* Period parameters */

 #define N 624
 #define M 397
 #define MATRIX_A 0x9908b0dfUL   /* constant vector a */
 #define N 624
 #define M 397
 #define MATRIX_A 0x9908b0dfUL   /* constant vector a */


@@ -54,12 +55,12 @@ static unsigned long mt[N]; /* the array for the state vector  */
 static int mti=N+1; /* mti==N+1 means mt[N] is not initialized */
 
 /* initializes mt[N] with a seed */
 static int mti=N+1; /* mti==N+1 means mt[N] is not initialized */
 
 /* initializes mt[N] with a seed */

-void init_genrand(unsigned long s)
+static void init_genrand(unsigned long s)

 {
     mt[0]= s & 0xffffffffUL;
     for (mti=1; mti<N; mti++) {
 {
     mt[0]= s & 0xffffffffUL;
     for (mti=1; mti<N; mti++) {

-        mt[mti] = 
-            (1812433253UL * (mt[mti-1] ^ (mt[mti-1] >> 30)) + mti); 
+        mt[mti] =
+            (1812433253UL * (mt[mti-1] ^ (mt[mti-1] >> 30)) + mti);

         /* See Knuth TAOCP Vol2. 3rd Ed. P.106 for multiplier. */
         /* In the previous versions, MSBs of the seed affect   */
         /* only MSBs of the array mt[].                        */
         /* See Knuth TAOCP Vol2. 3rd Ed. P.106 for multiplier. */
         /* In the previous versions, MSBs of the seed affect   */
         /* only MSBs of the array mt[].                        */


@@ -73,7 +74,7 @@ void init_genrand(unsigned long s)
 /* init_key is the array for initializing keys */
 /* key_length is its length */
 /* slight change for C++, 2004/2/26 */
 /* init_key is the array for initializing keys */
 /* key_length is its length */
 /* slight change for C++, 2004/2/26 */

-void init_by_array(unsigned long init_key[], int key_length)
+static void init_by_array(unsigned long init_key[], int key_length)

 {
     int i, j, k;
     init_genrand(19650218UL);
 {
     int i, j, k;
     init_genrand(19650218UL);


@@ -95,7 +96,7 @@ void init_by_array(unsigned long init_key[], int key_length)
         if (i>=N) { mt[0] = mt[N-1]; i=1; }
     }
 
         if (i>=N) { mt[0] = mt[N-1]; i=1; }
     }
 

-    mt[0] = 0x80000000UL; /* MSB is 1; assuring non-zero initial array */ 
+    mt[0] = 0x80000000UL; /* MSB is 1; assuring non-zero initial array */

 }
 
 /* generates a random number on [0,0xffffffff]-interval */
 }
 
 /* generates a random number on [0,0xffffffff]-interval */


@@ -123,7 +124,7 @@ uint32_t genrand_int32(void) {
 
     mti = 0;
   }
 
     mti = 0;
   }

-  
+

   y = mt[mti++];
 
   /* Tempering */
   y = mt[mti++];
 
   /* Tempering */