Exemplo n.º 1
0
/*
** returns 0 = chunk loaded; 1 = error; 2 = no more chunks to load
*/
static int protectedparser (ZIO *z, int bin) {
  volatile struct C_Lua_Stack oldCLS = L->Cstack;
  struct lua_longjmp myErrorJmp;
  volatile int status;
  TProtoFunc *volatile tf;
  struct lua_longjmp *volatile oldErr = L->errorJmp;
  L->errorJmp = &myErrorJmp;
  if (setjmp(myErrorJmp.b) == 0) {
    tf = bin ? luaU_undump1(z) : luaY_parser(z);
    status = 0;
  }
  else {  /* an error occurred: restore L->Cstack and L->stack.top */
    L->Cstack = oldCLS;
    L->stack.top = L->stack.stack+L->Cstack.base;
    tf = NULL;
    status = 1;
  }
  L->errorJmp = oldErr;
  if (status) return 1;  /* error code */
  if (tf == NULL) return 2;  /* 'natural' end */
  luaD_adjusttop(L->Cstack.base+1);  /* one slot for the pseudo-function */
  L->stack.stack[L->Cstack.base].ttype = LUA_T_PROTO;
  L->stack.stack[L->Cstack.base].value.tf = tf;
  luaV_closure(0);
  return 0;
}
Exemplo n.º 2
0
void lua_pushCclosure(lua_CFunction fn, int32 n) {
	if (!fn)
		lua_error("API error - attempt to push a NULL Cfunction");
	checkCparams(n);
	ttype(lua_state->stack.top) = LUA_T_CPROTO;
	fvalue(lua_state->stack.top) = fn;
	incr_top;
	luaV_closure(n);
}
Exemplo n.º 3
0
void lua_pushcclosure (lua_CFunction fn, int n)
{
  if (fn == NULL)
    lua_error("API error - attempt to push a NULL Cfunction");
  checkCparams(n);
  ttype(L->stack.top) = LUA_T_CPROTO;
  fvalue(L->stack.top) = fn;
  incr_top;
  luaV_closure(n);
  luaC_checkGC();
}
Exemplo n.º 4
0
/*
** returns 0 = chunk loaded; 1 = error; 2 = no more chunks to load
*/
static int32 protectedparser(ZIO *z, int32 bin) {
	int32 status;
	TProtoFunc *tf;
	jmp_buf myErrorJmp;
	jmp_buf *oldErr = lua_state->errorJmp;
	lua_state->errorJmp = &myErrorJmp;
	if (setjmp(myErrorJmp) == 0) {
		tf = bin ? luaU_undump1(z) : luaY_parser(z);
		status = 0;
	} else {
		tf = NULL;
		status = 1;
	}
	lua_state->errorJmp = oldErr;
	if (status)
		return 1;  // error code
	if (tf == NULL)
		return 2;  // 'natural' end
	luaD_adjusttop(lua_state->Cstack.base + 1);  // one slot for the pseudo-function
	lua_state->stack.stack[lua_state->Cstack.base].ttype = LUA_T_PROTO;
	lua_state->stack.stack[lua_state->Cstack.base].value.tf = tf;
	luaV_closure(0);
	return 0;
}
Exemplo n.º 5
0
Arquivo: lvm.c Projeto: uvbs/wx2Server
void luaV_Cclosure (lua_State *L, lua_CFunction c, int nelems) {
  Closure *cl = luaV_closure(L, nelems);
  cl->f.c = c;
  cl->isC = 1;
}
Exemplo n.º 6
0
Arquivo: lvm.c Projeto: uvbs/wx2Server
void luaV_Lclosure (lua_State *L, Proto *l, int nelems) {
  Closure *cl = luaV_closure(L, nelems);
  cl->f.l = l;
  cl->isC = 0;
}
Exemplo n.º 7
0
/*
** Execute the given opcode, until a RET. Parameters are between
** [stack+base,top). Returns n such that the the results are between
** [stack+n,top).
*/
StkId luaV_execute (struct CallInfo *ci)
{
  /* Save index in case CallInfo array is realloc'd */
  int32 ci_index = ci - L->base_ci;
  struct Stack *S = &L->stack;  /* to optimize */
  Closure *cl;
  TProtoFunc *tf;
  StkId base;
  Byte *pc;
  TObject *consts;
 newfunc:
  cl = L->ci->c;
  tf = L->ci->tf;
  base = L->ci->base;
  if (S->top-S->stack > base && ttype(S->stack+base) == LUA_T_LINE)
    base++;
  pc = L->ci->pc;
  consts = tf->consts;
  while (1) {
    int32 aux;
    switch ((OpCode)(aux = *pc++)) {

      case PUSHNIL0:
        ttype(S->top++) = LUA_T_NIL;
        break;

      case PUSHNIL:
        aux = *pc++;
        do {
          ttype(S->top++) = LUA_T_NIL;
        } while (aux--);
        break;

      case PUSHNUMBER:
        aux = *pc++; goto pushnumber;

      case PUSHNUMBERW:
        aux = next_word(pc); goto pushnumber;

      case PUSHNUMBER0: case PUSHNUMBER1: case PUSHNUMBER2:
        aux -= PUSHNUMBER0;
      pushnumber:
        ttype(S->top) = LUA_T_NUMBER;
        nvalue(S->top) = (real)aux;
        S->top++;
        break;

      case PUSHLOCAL:
        aux = *pc++; goto pushlocal;

      case PUSHLOCAL0: case PUSHLOCAL1: case PUSHLOCAL2: case PUSHLOCAL3:
      case PUSHLOCAL4: case PUSHLOCAL5: case PUSHLOCAL6: case PUSHLOCAL7:
        aux -= PUSHLOCAL0;
      pushlocal:
        *S->top++ = *((S->stack+base) + aux);
        break;

      case GETGLOBALW:
        aux = next_word(pc); goto getglobal;

      case GETGLOBAL:
        aux = *pc++; goto getglobal;

      case GETGLOBAL0: case GETGLOBAL1: case GETGLOBAL2: case GETGLOBAL3:
      case GETGLOBAL4: case GETGLOBAL5: case GETGLOBAL6: case GETGLOBAL7:
        aux -= GETGLOBAL0;
      getglobal:
        luaV_getglobal(tsvalue(&consts[aux]));
        break;

      case GETTABLE:
       luaV_gettable();
       break;

      case GETDOTTEDW:
        aux = next_word(pc); goto getdotted;

      case GETDOTTED:
        aux = *pc++; goto getdotted;

      case GETDOTTED0: case GETDOTTED1: case GETDOTTED2: case GETDOTTED3:
      case GETDOTTED4: case GETDOTTED5: case GETDOTTED6: case GETDOTTED7:
        aux -= GETDOTTED0;
      getdotted:
        *S->top++ = consts[aux];
        luaV_gettable();
        break;

      case PUSHSELFW:
        aux = next_word(pc); goto pushself;

      case PUSHSELF:
        aux = *pc++; goto pushself;

      case PUSHSELF0: case PUSHSELF1: case PUSHSELF2: case PUSHSELF3:
      case PUSHSELF4: case PUSHSELF5: case PUSHSELF6: case PUSHSELF7:
        aux -= PUSHSELF0;
      pushself: {
        TObject receiver = *(S->top-1);
        *S->top++ = consts[aux];
        luaV_gettable();
        *S->top++ = receiver;
        break;
      }

      case PUSHCONSTANTW:
        aux = next_word(pc); goto pushconstant;

      case PUSHCONSTANT:
        aux = *pc++; goto pushconstant;

      case PUSHCONSTANT0: case PUSHCONSTANT1: case PUSHCONSTANT2:
      case PUSHCONSTANT3: case PUSHCONSTANT4: case PUSHCONSTANT5:
      case PUSHCONSTANT6: case PUSHCONSTANT7:
        aux -= PUSHCONSTANT0;
      pushconstant:
        *S->top++ = consts[aux];
        break;

      case PUSHUPVALUE:
        aux = *pc++; goto pushupvalue;

      case PUSHUPVALUE0: case PUSHUPVALUE1:
        aux -= PUSHUPVALUE0;
      pushupvalue:
        *S->top++ = cl->consts[aux+1];
        break;

      case SETLOCAL:
        aux = *pc++; goto setlocal;

      case SETLOCAL0: case SETLOCAL1: case SETLOCAL2: case SETLOCAL3:
      case SETLOCAL4: case SETLOCAL5: case SETLOCAL6: case SETLOCAL7:
        aux -= SETLOCAL0;
      setlocal:
        *((S->stack+base) + aux) = *(--S->top);
        break;

      case SETGLOBALW:
        aux = next_word(pc); goto setglobal;

      case SETGLOBAL:
        aux = *pc++; goto setglobal;

      case SETGLOBAL0: case SETGLOBAL1: case SETGLOBAL2: case SETGLOBAL3:
      case SETGLOBAL4: case SETGLOBAL5: case SETGLOBAL6: case SETGLOBAL7:
        aux -= SETGLOBAL0;
      setglobal:
        luaV_setglobal(tsvalue(&consts[aux]));
        break;

      case SETTABLE0:
       luaV_settable(S->top-3, 1);
       break;

      case SETTABLE:
        luaV_settable(S->top-3-(*pc++), 2);
        break;

      case SETLISTW:
        aux = next_word(pc); aux *= LFIELDS_PER_FLUSH; goto setlist;

      case SETLIST:
        aux = *(pc++) * LFIELDS_PER_FLUSH; goto setlist;

      case SETLIST0:
        aux = 0;
      setlist: {
        int32 n = *(pc++);
        TObject *arr = S->top-n-1;
        for (; n; n--) {
          ttype(S->top) = LUA_T_NUMBER;
          nvalue(S->top) = (real)(n+aux);
          *(luaH_set(avalue(arr), S->top)) = *(S->top-1);
          S->top--;
        }
        break;
      }

      case SETMAP0:
        aux = 0; goto setmap;

      case SETMAP:
        aux = *pc++;
      setmap: {
        TObject *arr = S->top-(2*aux)-3;
        do {
          *(luaH_set(avalue(arr), S->top-2)) = *(S->top-1);
          S->top-=2;
        } while (aux--);
        break;
      }

      case POP:
        aux = *pc++; goto pop;

      case POP0: case POP1:
        aux -= POP0;
      pop:
        S->top -= (aux+1);
        break;

      case CREATEARRAYW:
        aux = next_word(pc); goto createarray;

      case CREATEARRAY0: case CREATEARRAY1:
        aux -= CREATEARRAY0; goto createarray;

      case CREATEARRAY:
        aux = *pc++;
      createarray:
        luaC_checkGC();
        avalue(S->top) = luaH_new(aux);
        ttype(S->top) = LUA_T_ARRAY;
        S->top++;
        break;

      case EQOP: case NEQOP: {
        int32 res = luaO_equalObj(S->top-2, S->top-1);
        S->top--;
        if (aux == NEQOP) res = !res;
        ttype(S->top-1) = res ? LUA_T_NUMBER : LUA_T_NIL;
        nvalue(S->top-1) = 1;
        break;
      }

       case LTOP:
         comparison(LUA_T_NUMBER, LUA_T_NIL, LUA_T_NIL, IM_LT);
         break;

      case LEOP:
        comparison(LUA_T_NUMBER, LUA_T_NUMBER, LUA_T_NIL, IM_LE);
        break;

      case GTOP:
        comparison(LUA_T_NIL, LUA_T_NIL, LUA_T_NUMBER, IM_GT);
        break;

      case GEOP:
        comparison(LUA_T_NIL, LUA_T_NUMBER, LUA_T_NUMBER, IM_GE);
        break;

      case ADDOP: {
        TObject *l = S->top-2;
        TObject *r = S->top-1;
        if (tonumber(r) || tonumber(l))
          call_arith(IM_ADD);
        else {
          nvalue(l) += nvalue(r);
          --S->top;
        }
        break;
      }

      case SUBOP: {
        TObject *l = S->top-2;
        TObject *r = S->top-1;
        if (tonumber(r) || tonumber(l))
          call_arith(IM_SUB);
        else {
          nvalue(l) -= nvalue(r);
          --S->top;
        }
        break;
      }

      case MULTOP: {
        TObject *l = S->top-2;
        TObject *r = S->top-1;
        if (tonumber(r) || tonumber(l))
          call_arith(IM_MUL);
        else {
          nvalue(l) *= nvalue(r);
          --S->top;
        }
        break;
      }

      case DIVOP: {
        TObject *l = S->top-2;
        TObject *r = S->top-1;
        if (tonumber(r) || tonumber(l))
          call_arith(IM_DIV);
        else {
          nvalue(l) /= nvalue(r);
          --S->top;
        }
        break;
      }

      case POWOP:
        call_binTM(IM_POW, "undefined operation");
        break;

      case CONCOP: {
        TObject *l = S->top-2;
        TObject *r = S->top-1;
        if (tostring(l) || tostring(r))
          call_binTM(IM_CONCAT, "unexpected type for concatenation");
        else {
          tsvalue(l) = strconc(tsvalue(l), tsvalue(r));
          --S->top;
        }
        luaC_checkGC();
        break;
      }

      case MINUSOP:
        if (tonumber(S->top-1)) {
          ttype(S->top) = LUA_T_NIL;
          S->top++;
          call_arith(IM_UNM);
        }
        else
          nvalue(S->top-1) = - nvalue(S->top-1);
        break;

      case NOTOP:
        ttype(S->top-1) =
           (ttype(S->top-1) == LUA_T_NIL) ? LUA_T_NUMBER : LUA_T_NIL;
        nvalue(S->top-1) = 1;
        break;

      case ONTJMPW:
        aux = next_word(pc); goto ontjmp;

      case ONTJMP:
        aux = *pc++;
      ontjmp:
        if (ttype(S->top-1) != LUA_T_NIL) pc += aux;
        else S->top--;
        break;

      case ONFJMPW:
        aux = next_word(pc); goto onfjmp;

      case ONFJMP:
        aux = *pc++;
      onfjmp:
        if (ttype(S->top-1) == LUA_T_NIL) pc += aux;
        else S->top--;
        break;

      case JMPW:
        aux = next_word(pc); goto jmp;

      case JMP:
        aux = *pc++;
      jmp:
        pc += aux;
        break;

      case IFFJMPW:
        aux = next_word(pc); goto iffjmp;

      case IFFJMP:
        aux = *pc++;
      iffjmp:
        if (ttype(--S->top) == LUA_T_NIL) pc += aux;
        break;

      case IFTUPJMPW:
        aux = next_word(pc); goto iftupjmp;

      case IFTUPJMP:
        aux = *pc++;
      iftupjmp:
        if (ttype(--S->top) != LUA_T_NIL) pc -= aux;
        break;

      case IFFUPJMPW:
        aux = next_word(pc); goto iffupjmp;

      case IFFUPJMP:
        aux = *pc++;
      iffupjmp:
        if (ttype(--S->top) == LUA_T_NIL) pc -= aux;
        break;

    case CLOSURE:
      aux = *pc++;
      goto closure;

    case CLOSURE0:
      aux = 0;
      goto closure;

    case CLOSURE1:
      aux = 1;
      closure:
        luaV_closure(aux);
        luaC_checkGC();
        break;

      case CALLFUNC:
        aux = *pc++; goto callfunc;

      case CALLFUNC0: case CALLFUNC1:
        aux -= CALLFUNC0;
      callfunc: {
        StkId newBase = (S->top-S->stack)-(*pc++);
	TObject *func = S->stack+newBase-1;
	L->ci->pc = pc;
	if (ttype(func) == LUA_T_PROTO ||
	    (ttype(func) == LUA_T_CLOSURE &&
	     ttype(&clvalue(func)->consts[0]) == LUA_T_PROTO)) {

	  /* Calling another Lua function */
	  luaD_precall(func, newBase, aux);
	  ttype(func) = (ttype(func) == LUA_T_PROTO) ?
	    LUA_T_PMARK : LUA_T_CLMARK;
	  goto newfunc;
	}
        luaD_call(newBase, aux);

	if (L->Tstate != RUN) {
	  if (ci_index > 1)	/* C functions detected by break_here */
	    lua_error("Cannot yield through method call");
	  return -1;
	}
        break;
      }

      case ENDCODE:
        S->top = S->stack + base;
        /* goes through */
      case RETCODE: {
	StkId firstResult = (base + ((aux==RETCODE) ? *pc : 0));
        if (lua_callhook)
          luaD_callHook(base, NULL, 1);
	/* If returning from the original stack frame, terminate */
	if (L->ci == L->base_ci + ci_index)
	  return firstResult;
	luaD_postret(firstResult);
	goto newfunc;
      }

      case SETLINEW:
        aux = next_word(pc); goto setline;

      case SETLINE:
        aux = *pc++;
      setline:
        if ((S->stack+base-1)->ttype != LUA_T_LINE) {
          /* open space for LINE value */
          luaD_openstack((S->top-S->stack)-base);
          base++;
          (S->stack+base-1)->ttype = LUA_T_LINE;
        }
        (S->stack+base-1)->value.i = aux;
        if (lua_linehook)
          luaD_lineHook(aux);
        break;

#ifdef DEBUG
      default:
        LUA_INTERNALERROR("opcode doesn't match");
#endif
    }
  }
}
Exemplo n.º 8
0
StkId luaV_execute(lua_Task *task) {
	if (!task->some_flag) {
		luaD_checkstack((*task->pc++) + EXTRA_STACK);
		if (*task->pc < ZEROVARARG) {
			luaD_adjusttop(task->base + *(task->pc++));
		} else {
			luaC_checkGC();
			adjust_varargs(task->base + (*task->pc++) - ZEROVARARG);
		}
		task->some_flag = 1;
	}
	lua_state->state_counter2++;

	while (1) {
		switch ((OpCode)(task->aux = *task->pc++)) {
		case PUSHNIL0:
			ttype(task->S->top++) = LUA_T_NIL;
			break;
		case PUSHNIL:
			task->aux = *task->pc++;
			do {
				ttype(task->S->top++) = LUA_T_NIL;
			} while (task->aux--);
			break;
		case PUSHNUMBER:
			task->aux = *task->pc++;
			goto pushnumber;
		case PUSHNUMBERW:
			task->aux = next_word(task->pc);
			goto pushnumber;
		case PUSHNUMBER0:
		case PUSHNUMBER1:
		case PUSHNUMBER2:
			task->aux -= PUSHNUMBER0;
pushnumber:
			ttype(task->S->top) = LUA_T_NUMBER;
			nvalue(task->S->top) = (float)task->aux;
			task->S->top++;
			break;
		case PUSHLOCAL:
			task->aux = *task->pc++;
			goto pushlocal;
		case PUSHLOCAL0:
		case PUSHLOCAL1:
		case PUSHLOCAL2:
		case PUSHLOCAL3:
		case PUSHLOCAL4:
		case PUSHLOCAL5:
		case PUSHLOCAL6:
		case PUSHLOCAL7:
			task->aux -= PUSHLOCAL0;
pushlocal:
			*task->S->top++ = *((task->S->stack + task->base) + task->aux);
			break;
		case GETGLOBALW:
			task->aux = next_word(task->pc);
			goto getglobal;
		case GETGLOBAL:
			task->aux = *task->pc++;
			goto getglobal;
		case GETGLOBAL0:
		case GETGLOBAL1:
		case GETGLOBAL2:
		case GETGLOBAL3:
		case GETGLOBAL4:
		case GETGLOBAL5:
		case GETGLOBAL6:
		case GETGLOBAL7:
			task->aux -= GETGLOBAL0;
getglobal:
			luaV_getglobal(tsvalue(&task->consts[task->aux]));
			break;
		case GETTABLE:
			luaV_gettable();
			break;
		case GETDOTTEDW:
			task->aux = next_word(task->pc); goto getdotted;
		case GETDOTTED:
			task->aux = *task->pc++;
			goto getdotted;
		case GETDOTTED0:
		case GETDOTTED1:
		case GETDOTTED2:
		case GETDOTTED3:
		case GETDOTTED4:
		case GETDOTTED5:
		case GETDOTTED6:
		case GETDOTTED7:
			task->aux -= GETDOTTED0;
getdotted:
			*task->S->top++ = task->consts[task->aux];
			luaV_gettable();
			break;
		case PUSHSELFW:
			task->aux = next_word(task->pc);
			goto pushself;
		case PUSHSELF:
			task->aux = *task->pc++;
			goto pushself;
		case PUSHSELF0:
		case PUSHSELF1:
		case PUSHSELF2:
		case PUSHSELF3:
		case PUSHSELF4:
		case PUSHSELF5:
		case PUSHSELF6:
		case PUSHSELF7:
			task->aux -= PUSHSELF0;
pushself:
			{
				TObject receiver = *(task->S->top - 1);
				*task->S->top++ = task->consts[task->aux];
				luaV_gettable();
				*task->S->top++ = receiver;
				break;
			}
		case PUSHCONSTANTW:
			task->aux = next_word(task->pc);
			goto pushconstant;
		case PUSHCONSTANT:
			task->aux = *task->pc++; goto pushconstant;
		case PUSHCONSTANT0:
		case PUSHCONSTANT1:
		case PUSHCONSTANT2:
		case PUSHCONSTANT3:
		case PUSHCONSTANT4:
		case PUSHCONSTANT5:
		case PUSHCONSTANT6:
		case PUSHCONSTANT7:
			task->aux -= PUSHCONSTANT0;
pushconstant:
			*task->S->top++ = task->consts[task->aux];
			break;
		case PUSHUPVALUE:
			task->aux = *task->pc++;
			goto pushupvalue;
		case PUSHUPVALUE0:
		case PUSHUPVALUE1:
			task->aux -= PUSHUPVALUE0;
pushupvalue:
			*task->S->top++ = task->cl->consts[task->aux + 1];
			break;
		case SETLOCAL:
			task->aux = *task->pc++;
			goto setlocal;
		case SETLOCAL0:
		case SETLOCAL1:
		case SETLOCAL2:
		case SETLOCAL3:
		case SETLOCAL4:
		case SETLOCAL5:
		case SETLOCAL6:
		case SETLOCAL7:
			task->aux -= SETLOCAL0;
setlocal:
			*((task->S->stack + task->base) + task->aux) = *(--task->S->top);
			break;
		case SETGLOBALW:
			task->aux = next_word(task->pc);
			goto setglobal;
		case SETGLOBAL:
			task->aux = *task->pc++;
			goto setglobal;
		case SETGLOBAL0:
		case SETGLOBAL1:
		case SETGLOBAL2:
		case SETGLOBAL3:
		case SETGLOBAL4:
		case SETGLOBAL5:
		case SETGLOBAL6:
		case SETGLOBAL7:
			task->aux -= SETGLOBAL0;
setglobal:
			luaV_setglobal(tsvalue(&task->consts[task->aux]));
			break;
		case SETTABLE0:
			luaV_settable(task->S->top - 3, 1);
			break;
		case SETTABLE:
			luaV_settable(task->S->top - 3 - (*task->pc++), 2);
			break;
		case SETLISTW:
			task->aux = next_word(task->pc);
			task->aux *= LFIELDS_PER_FLUSH;
			goto setlist;
		case SETLIST:
			task->aux = *(task->pc++) * LFIELDS_PER_FLUSH;
			goto setlist;
		case SETLIST0:
			task->aux = 0;
setlist:
			{
				int32 n = *(task->pc++);
				TObject *arr = task->S->top - n - 1;
				for (; n; n--) {
					ttype(task->S->top) = LUA_T_NUMBER;
					nvalue(task->S->top) = (float)(n + task->aux);
					*(luaH_set(avalue(arr), task->S->top)) = *(task->S->top - 1);
					task->S->top--;
			}
			break;
		}
		case SETMAP0:
			task->aux = 0;
			goto setmap;
		case SETMAP:
			task->aux = *task->pc++;
setmap:
			{
				TObject *arr = task->S->top - (2 * task->aux) - 3;
				do {
					*(luaH_set(avalue(arr), task->S->top - 2)) = *(task->S->top - 1);
					task->S->top -= 2;
				} while (task->aux--);
				break;
			}
		case POP:
			task->aux = *task->pc++;
			goto pop;
		case POP0:
		case POP1:
			task->aux -= POP0;
pop:
			task->S->top -= (task->aux + 1);
			break;
		case CREATEARRAYW:
			task->aux = next_word(task->pc);
			goto createarray;
		case CREATEARRAY0:
		case CREATEARRAY1:
			task->aux -= CREATEARRAY0;
			goto createarray;
		case CREATEARRAY:
			task->aux = *task->pc++;
createarray:
			luaC_checkGC();
			avalue(task->S->top) = luaH_new(task->aux);
			ttype(task->S->top) = LUA_T_ARRAY;
			task->S->top++;
			break;
		case EQOP:
		case NEQOP:
			{
				int32 res = luaO_equalObj(task->S->top - 2, task->S->top - 1);
				task->S->top--;
				if (task->aux == NEQOP)
					res = !res;
				ttype(task->S->top - 1) = res ? LUA_T_NUMBER : LUA_T_NIL;
				nvalue(task->S->top - 1) = 1;
				break;
			}
		case LTOP:
			comparison(LUA_T_NUMBER, LUA_T_NIL, LUA_T_NIL, IM_LT);
			break;
		case LEOP:
			comparison(LUA_T_NUMBER, LUA_T_NUMBER, LUA_T_NIL, IM_LE);
			break;
		case GTOP:
			comparison(LUA_T_NIL, LUA_T_NIL, LUA_T_NUMBER, IM_GT);
			break;
		case GEOP:
			comparison(LUA_T_NIL, LUA_T_NUMBER, LUA_T_NUMBER, IM_GE);
			break;
		case ADDOP:
			{
				TObject *l = task->S->top - 2;
				TObject *r = task->S->top - 1;
				if (tonumber(r) || tonumber(l))
					call_arith(IM_ADD);
				else {
					nvalue(l) += nvalue(r);
					--task->S->top;
				}
			break;
			}
		case SUBOP:
			{
				TObject *l = task->S->top - 2;
				TObject *r = task->S->top - 1;
				if (tonumber(r) || tonumber(l))
					call_arith(IM_SUB);
				else {
					nvalue(l) -= nvalue(r);
					--task->S->top;
				}
				break;
			}
		case MULTOP:
			{
				TObject *l = task->S->top - 2;
				TObject *r = task->S->top - 1;
				if (tonumber(r) || tonumber(l))
					call_arith(IM_MUL);
				else {
					nvalue(l) *= nvalue(r);
					--task->S->top;
				}
				break;
			}
		case DIVOP:
			{
				TObject *l = task->S->top - 2;
				TObject *r = task->S->top - 1;
				if (tonumber(r) || tonumber(l))
					call_arith(IM_DIV);
				else {
					nvalue(l) /= nvalue(r);
					--task->S->top;
				}
				break;
			}
		case POWOP:
			call_arith(IM_POW);
			break;
		case CONCOP:
			{
				TObject *l = task->S->top - 2;
				TObject *r = task->S->top - 1;
				if (tostring(l) || tostring(r))
					call_binTM(IM_CONCAT, "unexpected type for concatenation");
				else {
					tsvalue(l) = strconc(svalue(l), svalue(r));
					--task->S->top;
				}
				luaC_checkGC();
				break;
			}
		case MINUSOP:
			if (tonumber(task->S->top - 1)) {
				ttype(task->S->top) = LUA_T_NIL;
				task->S->top++;
				call_arith(IM_UNM);
			} else
				nvalue(task->S->top - 1) = -nvalue(task->S->top - 1);
			break;
		case NOTOP:
			ttype(task->S->top - 1) = (ttype(task->S->top - 1) == LUA_T_NIL) ? LUA_T_NUMBER : LUA_T_NIL;
			nvalue(task->S->top - 1) = 1;
			break;
		case ONTJMPW:
			task->aux = next_word(task->pc);
			goto ontjmp;
		case ONTJMP:
			task->aux = *task->pc++;
ontjmp:
			if (ttype(task->S->top - 1) != LUA_T_NIL)
				task->pc += task->aux;
			else
				task->S->top--;
			break;
		case ONFJMPW:
			task->aux = next_word(task->pc);
			goto onfjmp;
		case ONFJMP:
			task->aux = *task->pc++;
onfjmp:
			if (ttype(task->S->top - 1) == LUA_T_NIL)
				task->pc += task->aux;
			else
				task->S->top--;
			break;
		case JMPW:
			task->aux = next_word(task->pc);
			goto jmp;
		case JMP:
			task->aux = *task->pc++;
jmp:
			task->pc += task->aux;
			break;
		case IFFJMPW:
			task->aux = next_word(task->pc);
			goto iffjmp;
		case IFFJMP:
			task->aux = *task->pc++;
iffjmp:
			if (ttype(--task->S->top) == LUA_T_NIL)
				task->pc += task->aux;
			break;
		case IFTUPJMPW:
			task->aux = next_word(task->pc);
			goto iftupjmp;
		case IFTUPJMP:
			task->aux = *task->pc++;
iftupjmp:
			if (ttype(--task->S->top) != LUA_T_NIL)
				task->pc -= task->aux;
			break;
		case IFFUPJMPW:
			task->aux = next_word(task->pc);
			goto iffupjmp;
		case IFFUPJMP:
			task->aux = *task->pc++;
iffupjmp:
			if (ttype(--task->S->top) == LUA_T_NIL)
				task->pc -= task->aux;
			break;
		case CLOSURE:
			task->aux = *task->pc++;
			goto closure;
		case CLOSURE0:
		case CLOSURE1:
			task->aux -= CLOSURE0;
closure:
			luaV_closure(task->aux);
			luaC_checkGC();
			break;
	  case CALLFUNC:
			task->aux = *task->pc++;
			goto callfunc;
	  case CALLFUNC0:
	  case CALLFUNC1:
			task->aux -= CALLFUNC0;
callfunc:
			lua_state->state_counter2--;
			return -((task->S->top - task->S->stack) - (*task->pc++));
		case ENDCODE:
			task->S->top = task->S->stack + task->base;
			// goes through
		case RETCODE:
			lua_state->state_counter2--;
			return (task->base + ((task->aux == 123) ? *task->pc : 0));
		case SETLINEW:
			task->aux = next_word(task->pc);
			goto setline;
		case SETLINE:
			task->aux = *task->pc++;
setline:
			if ((task->S->stack + task->base - 1)->ttype != LUA_T_LINE) {
				// open space for LINE value */
				luaD_openstack((task->S->top - task->S->stack) - task->base);
				task->base++;
				(task->S->stack + task->base - 1)->ttype = LUA_T_LINE;
			}
			(task->S->stack + task->base - 1)->value.i = task->aux;
			if (lua_linehook)
				luaD_lineHook(task->aux);
			break;
#ifdef LUA_DEBUG
		default:
			LUA_INTERNALERROR("internal error - opcode doesn't match");
#endif
		}
	}
}