variants for "ARGS".

lopcodes.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.12 1997/10/24 18:40:29 roberto Exp roberto $
+** $Id: lopcodes.h,v 1.13 1997/12/29 17:35:46 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -172,6 +172,10 @@ POP0,/*		-	-		-		TOP-=1  */
 POP1,/*		-	-		-		TOP-=2  */
 
 ARGS,/*		b	-		-		TOP=BASE+b  */
+ARGS0,/*	-	-		-		TOP=BASE+0  */
+ARGS1,/*	-	-		-		TOP=BASE+1  */
+ARGS2,/*	-	-		-		TOP=BASE+2  */
+ARGS3,/*	-	-		-		TOP=BASE+3  */
 VARARGS/*	b	v_x...v_1	{v_1...v_x;n=x}	TOP=BASE+b+1  */
 } OpCode;
 

lua.stx

@@ -1,6 +1,6 @@
 %{
 /*
-** $Id: lua.stx,v 1.29 1997/12/29 17:28:45 roberto Exp roberto $
+** $Id: lua.stx,v 1.30 1997/12/29 17:35:46 roberto Exp roberto $
 ** Syntax analizer and code generator
 ** See Copyright Notice in lua.h
 */
@@ -450,7 +450,7 @@ static void code_args (int nparams, int dots)
 {
   L->currState->nlocalvar += nparams;
   if (!dots)
-    code_oparg(ARGS, 0, L->currState->nlocalvar, L->currState->nlocalvar);
+    code_oparg(ARGS, 4, L->currState->nlocalvar, L->currState->nlocalvar);
   else {
     code_oparg(VARARGS, 0, L->currState->nlocalvar, L->currState->nlocalvar+1);
     add_localvar(luaS_new("arg"));

lvm.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.c,v 1.19 1997/12/23 19:24:19 roberto Exp roberto $
+** $Id: lvm.c,v 1.20 1997/12/29 17:35:46 roberto Exp roberto $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -474,7 +474,12 @@ StkId luaV_execute (Closure *cl, TProtoFunc *tf, StkId base)
         break;
 
       case ARGS:
-        luaD_adjusttop(base+(*pc++));
+        aux = *pc++; goto args;
+
+      case ARGS0: case ARGS1: case ARGS2: case ARGS3:
+        aux -= ARGS0;
+      args:
+        luaD_adjusttop(base+aux);
         break;
 
       case VARARGS: