diff --git a/lcode.c b/lcode.c
index 34dadd1f..149114cf 100644
--- a/lcode.c
+++ b/lcode.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.c,v 2.72 2013/08/30 16:01:37 roberto Exp roberto $
+** $Id: lcode.c,v 2.73 2013/12/16 14:30:22 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -762,6 +762,7 @@ static int constfolding (OpCode op, expdesc *e1, expdesc *e2) {
        ((op == OP_MOD && ivalue(&v2) == 0) ||   /* ...avoid module by 0... */
         (op == OP_POW && ivalue(&v2) < 0)))  /* ...and negative exponents */
     return 0;
+  lua_assert(OP_IDIV - OP_ADD + LUA_OPADD == LUA_OPIDIV);
   luaO_arith(NULL, op - OP_ADD + LUA_OPADD, &v1, &v2, &res);
   if (ttisinteger(&res)) {
     e1->k = VKINT;
diff --git a/lcode.h b/lcode.h
index ddf4094c..65416637 100644
--- a/lcode.h
+++ b/lcode.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.h,v 1.59 2013/04/25 19:35:19 roberto Exp roberto $
+** $Id: lcode.h,v 1.60 2013/04/26 13:07:53 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -24,7 +24,9 @@
 ** grep "ORDER OPR" if you change these enums  (ORDER OP)
 */
 typedef enum BinOpr {
-  OPR_ADD, OPR_SUB, OPR_MUL, OPR_DIV, OPR_IDIV, OPR_MOD, OPR_POW,
+  OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW,
+  OPR_DIV,
+  OPR_IDIV,
   OPR_CONCAT,
   OPR_EQ, OPR_LT, OPR_LE,
   OPR_NE, OPR_GT, OPR_GE,
diff --git a/lopcodes.c b/lopcodes.c
index 64a637b8..fd2261fb 100644
--- a/lopcodes.c
+++ b/lopcodes.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.c,v 1.49 2012/05/14 13:34:18 roberto Exp roberto $
+** $Id: lopcodes.c,v 1.50 2013/04/26 13:07:53 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -31,10 +31,10 @@ LUAI_DDEF const char *const luaP_opnames[NUM_OPCODES+1] = {
   "ADD",
   "SUB",
   "MUL",
-  "DIV",
-  "IDIV",
   "MOD",
   "POW",
+  "DIV",
+  "IDIV",
   "UNM",
   "NOT",
   "LEN",
@@ -80,10 +80,10 @@ LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_ADD */
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_SUB */
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_MUL */
- ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_DIV */
- ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_IDIV */
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_MOD */
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_POW */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_DIV */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_IDIV */
  ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_UNM */
  ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_NOT */
  ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_LEN */
diff --git a/lopcodes.h b/lopcodes.h
index e427ce49..a5673ade 100644
--- a/lopcodes.h
+++ b/lopcodes.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.142 2011/07/15 12:50:29 roberto Exp roberto $
+** $Id: lopcodes.h,v 1.143 2013/04/26 13:07:53 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -187,10 +187,10 @@ OP_SELF,/*	A B C	R(A+1) := R(B); R(A) := R(B)[RK(C)]		*/
 OP_ADD,/*	A B C	R(A) := RK(B) + RK(C)				*/
 OP_SUB,/*	A B C	R(A) := RK(B) - RK(C)				*/
 OP_MUL,/*	A B C	R(A) := RK(B) * RK(C)				*/
-OP_DIV,/*	A B C	R(A) := RK(B) / RK(C)				*/
-OP_IDIV,/*	A B C	R(A) := RK(B) // RK(C)				*/
 OP_MOD,/*	A B C	R(A) := RK(B) % RK(C)				*/
 OP_POW,/*	A B C	R(A) := RK(B) ^ RK(C)				*/
+OP_DIV,/*	A B C	R(A) := RK(B) / RK(C)				*/
+OP_IDIV,/*	A B C	R(A) := RK(B) // RK(C)				*/
 OP_UNM,/*	A B	R(A) := -R(B)					*/
 OP_NOT,/*	A B	R(A) := not R(B)				*/
 OP_LEN,/*	A B	R(A) := length of R(B)				*/
diff --git a/lparser.c b/lparser.c
index 0f53ff7c..c23b2dde 100644
--- a/lparser.c
+++ b/lparser.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 2.134 2013/08/16 18:55:49 roberto Exp roberto $
+** $Id: lparser.c,v 2.135 2013/08/30 16:01:37 roberto Exp roberto $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -990,10 +990,10 @@ static BinOpr getbinopr (int op) {
     case '+': return OPR_ADD;
     case '-': return OPR_SUB;
     case '*': return OPR_MUL;
-    case '/': return OPR_DIV;
-    case TK_IDIV: return OPR_IDIV;
     case '%': return OPR_MOD;
     case '^': return OPR_POW;
+    case '/': return OPR_DIV;
+    case TK_IDIV: return OPR_IDIV;
     case TK_CONCAT: return OPR_CONCAT;
     case TK_NE: return OPR_NE;
     case TK_EQ: return OPR_EQ;
@@ -1012,12 +1012,14 @@ static const struct {
   lu_byte left;  /* left priority for each binary operator */
   lu_byte right; /* right priority */
 } priority[] = {  /* ORDER OPR */
-   {6, 6}, {6, 6},  /* '+' '-' */
-   {7, 7}, {7, 7}, {7, 7}, {7, 7},  /* '*' '/' '//' '%' */
-   {10, 9}, {5, 4},                 /* ^, .. (right associative) */
-   {3, 3}, {3, 3}, {3, 3},          /* ==, <, <= */
-   {3, 3}, {3, 3}, {3, 3},          /* ~=, >, >= */
-   {2, 2}, {1, 1}                   /* and, or */
+   {6, 6}, {6, 6},           /* '+' '-' */
+   {7, 7}, {7, 7},           /* '*' '%' */
+   {10, 9},                  /* '^' (right associative) */
+   {7, 7}, {7, 7},           /* '/' '//' */
+   {5, 4},                   /* '..' (right associative) */
+   {3, 3}, {3, 3}, {3, 3},   /* ==, <, <= */
+   {3, 3}, {3, 3}, {3, 3},   /* ~=, >, >= */
+   {2, 2}, {1, 1}            /* and, or */
 };
 
 #define UNARY_PRIORITY	8  /* priority for unary operators */
diff --git a/ltests.c b/ltests.c
index bf32c115..a4462798 100644
--- a/ltests.c
+++ b/ltests.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.c,v 2.158 2013/09/11 14:09:55 roberto Exp roberto $
+** $Id: ltests.c,v 2.159 2013/09/11 14:47:08 roberto Exp roberto $
 ** Internal Module for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -1198,7 +1198,7 @@ static int runC (lua_State *L, lua_State *L1, const char *pc) {
       }
     }
     else if EQ("arith") {
-      static char ops[] = "+-*/\\%^_";  /* '\'  -> '//'; '_' -> '..' */
+      static char ops[] = "+-*%^/\\_";  /* '\'  -> '//'; '_' -> '..' */
       int op;
       skip(&pc);
       op = strchr(ops, *pc++) - ops;
diff --git a/ltm.c b/ltm.c
index 62c1430c..8eb504d1 100644
--- a/ltm.c
+++ b/ltm.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.c,v 2.21 2013/08/21 20:09:51 roberto Exp roberto $
+** $Id: ltm.c,v 2.22 2013/08/27 18:53:35 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -36,8 +36,9 @@ void luaT_init (lua_State *L) {
   static const char *const luaT_eventname[] = {  /* ORDER TM */
     "__index", "__newindex",
     "__gc", "__mode", "__len", "__eq",
-    "__add", "__sub", "__mul", "__div", "__idiv", "__mod",
-    "__pow", "__unm", "__lt", "__le",
+    "__add", "__sub", "__mul", "__mod", "__pow",
+    "__div", "__idiv",
+    "__unm", "__lt", "__le",
     "__concat", "__call"
   };
   int i;
diff --git a/ltm.h b/ltm.h
index 053dc145..196825b9 100644
--- a/ltm.h
+++ b/ltm.h
@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.h,v 2.15 2013/04/26 13:07:53 roberto Exp roberto $
+** $Id: ltm.h,v 2.16 2013/04/29 16:56:50 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -13,7 +13,7 @@
 
 /*
 * WARNING: if you change the order of this enumeration,
-* grep "ORDER TM"
+* grep "ORDER TM" and "ORDER OP"
 */
 typedef enum {
   TM_INDEX,
@@ -25,10 +25,10 @@ typedef enum {
   TM_ADD,
   TM_SUB,
   TM_MUL,
-  TM_DIV,
-  TM_IDIV,
   TM_MOD,
   TM_POW,
+  TM_DIV,
+  TM_IDIV,
   TM_UNM,
   TM_LT,
   TM_LE,
diff --git a/lua.h b/lua.h
index f98513ac..a44a1d9a 100644
--- a/lua.h
+++ b/lua.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.294 2013/09/13 16:21:52 roberto Exp roberto $
+** $Id: lua.h,v 1.295 2013/12/09 14:21:10 roberto Exp roberto $
 ** Lua - A Scripting Language
 ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
 ** See Copyright Notice at the end of this file
@@ -182,13 +182,13 @@ LUA_API const void     *(lua_topointer) (lua_State *L, int idx);
 ** Comparison and arithmetic functions
 */
 
-#define LUA_OPADD	0	/* ORDER TM */
+#define LUA_OPADD	0	/* ORDER TM, ORDER OP */
 #define LUA_OPSUB	1
 #define LUA_OPMUL	2
-#define LUA_OPDIV	3
-#define LUA_OPIDIV	4
-#define LUA_OPMOD	5
-#define LUA_OPPOW	6
+#define LUA_OPMOD	3
+#define LUA_OPPOW	4
+#define LUA_OPDIV	5
+#define LUA_OPIDIV	6
 #define LUA_OPUNM	7
 
 LUA_API void  (lua_arith) (lua_State *L, int op);