diff --git a/version3.0/lib.nas b/version3.0/lib.nas
index bcf9de4..612e1b9 100644
--- a/version3.0/lib.nas
+++ b/version3.0/lib.nas
@@ -71,4 +71,28 @@ var io=
         nasal_call_builtin_foutput(filename,str);
         return;
     }
+};
+
+var bits=
+{
+    bitxor:func(a,b)
+    {
+        return nasal_call_builtin_xor(a,b);
+    },
+    bitand:func(a,b)
+    {
+        return nasal_call_builtin_and(a,b);
+    },
+    bitor:func(a,b)
+    {
+        return nasal_call_builtin_or(a,b);
+    },
+    bitnand:func(a,b)
+    {
+        return nasal_call_builtin_nand(a,b);
+    },
+    bitnot:func(a)
+    {
+        return nasal_call_builtin_not(a);
+    }
 };
\ No newline at end of file
diff --git a/version3.0/nasal_builtin.h b/version3.0/nasal_builtin.h
index 8039a19..f33bbc5 100644
--- a/version3.0/nasal_builtin.h
+++ b/version3.0/nasal_builtin.h
@@ -479,4 +479,129 @@ int nasal_runtime::builtin_size(int local_scope_addr)
     }
     return ret_addr;
 }
+int nasal_runtime::builtin_xor(int local_scope_addr)
+{
+    int a_addr=-1;
+    if(local_scope_addr>=0)
+        a_addr=nasal_vm.gc_get(local_scope_addr).get_closure().get_value_address("a");
+    if(a_addr<0 || nasal_vm.gc_get(a_addr).get_type()!=vm_number)
+    {
+        std::cout<<">> [runtime] builtin_xor: cannot find values or wrong value type(must be number)."<<std::endl;
+        ++error;
+        return -1;
+    }
+    int b_addr=-1;
+    if(local_scope_addr>=0)
+        b_addr=nasal_vm.gc_get(local_scope_addr).get_closure().get_value_address("b");
+    if(b_addr<0 || nasal_vm.gc_get(b_addr).get_type()!=vm_number)
+    {
+        std::cout<<">> [runtime] builtin_xor: cannot find values or wrong value type(must be number)."<<std::endl;
+        ++error;
+        return -1;
+    }
+    int number_a=(int)nasal_vm.gc_get(a_addr).get_number();
+    int number_b=(int)nasal_vm.gc_get(b_addr).get_number();
+    int ret_addr=nasal_vm.gc_alloc();
+    nasal_vm.gc_get(ret_addr).set_type(vm_number);
+    nasal_vm.gc_get(ret_addr).set_number((double)(number_a^number_b));
+    return ret_addr;
+}
+int nasal_runtime::builtin_and(int local_scope_addr)
+{
+    int a_addr=-1;
+    if(local_scope_addr>=0)
+        a_addr=nasal_vm.gc_get(local_scope_addr).get_closure().get_value_address("a");
+    if(a_addr<0 || nasal_vm.gc_get(a_addr).get_type()!=vm_number)
+    {
+        std::cout<<">> [runtime] builtin_and: cannot find values or wrong value type(must be number)."<<std::endl;
+        ++error;
+        return -1;
+    }
+    int b_addr=-1;
+    if(local_scope_addr>=0)
+        b_addr=nasal_vm.gc_get(local_scope_addr).get_closure().get_value_address("b");
+    if(b_addr<0 || nasal_vm.gc_get(b_addr).get_type()!=vm_number)
+    {
+        std::cout<<">> [runtime] builtin_and: cannot find values or wrong value type(must be number)."<<std::endl;
+        ++error;
+        return -1;
+    }
+    int number_a=(int)nasal_vm.gc_get(a_addr).get_number();
+    int number_b=(int)nasal_vm.gc_get(b_addr).get_number();
+    int ret_addr=nasal_vm.gc_alloc();
+    nasal_vm.gc_get(ret_addr).set_type(vm_number);
+    nasal_vm.gc_get(ret_addr).set_number((double)(number_a&number_b));
+    return ret_addr;
+}
+int nasal_runtime::builtin_or(int local_scope_addr)
+{
+    int a_addr=-1;
+    if(local_scope_addr>=0)
+        a_addr=nasal_vm.gc_get(local_scope_addr).get_closure().get_value_address("a");
+    if(a_addr<0 || nasal_vm.gc_get(a_addr).get_type()!=vm_number)
+    {
+        std::cout<<">> [runtime] builtin_or: cannot find values or wrong value type(must be number)."<<std::endl;
+        ++error;
+        return -1;
+    }
+    int b_addr=-1;
+    if(local_scope_addr>=0)
+        b_addr=nasal_vm.gc_get(local_scope_addr).get_closure().get_value_address("b");
+    if(b_addr<0 || nasal_vm.gc_get(b_addr).get_type()!=vm_number)
+    {
+        std::cout<<">> [runtime] builtin_or: cannot find values or wrong value type(must be number)."<<std::endl;
+        ++error;
+        return -1;
+    }
+    int number_a=(int)nasal_vm.gc_get(a_addr).get_number();
+    int number_b=(int)nasal_vm.gc_get(b_addr).get_number();
+    int ret_addr=nasal_vm.gc_alloc();
+    nasal_vm.gc_get(ret_addr).set_type(vm_number);
+    nasal_vm.gc_get(ret_addr).set_number((double)(number_a|number_b));
+    return ret_addr;
+}
+int nasal_runtime::builtin_nand(int local_scope_addr)
+{
+    int a_addr=-1;
+    if(local_scope_addr>=0)
+        a_addr=nasal_vm.gc_get(local_scope_addr).get_closure().get_value_address("a");
+    if(a_addr<0 || nasal_vm.gc_get(a_addr).get_type()!=vm_number)
+    {
+        std::cout<<">> [runtime] builtin_nand: cannot find values or wrong value type(must be number)."<<std::endl;
+        ++error;
+        return -1;
+    }
+    int b_addr=-1;
+    if(local_scope_addr>=0)
+        b_addr=nasal_vm.gc_get(local_scope_addr).get_closure().get_value_address("b");
+    if(b_addr<0 || nasal_vm.gc_get(b_addr).get_type()!=vm_number)
+    {
+        std::cout<<">> [runtime] builtin_nand: cannot find values or wrong value type(must be number)."<<std::endl;
+        ++error;
+        return -1;
+    }
+    int number_a=(int)nasal_vm.gc_get(a_addr).get_number();
+    int number_b=(int)nasal_vm.gc_get(b_addr).get_number();
+    int ret_addr=nasal_vm.gc_alloc();
+    nasal_vm.gc_get(ret_addr).set_type(vm_number);
+    nasal_vm.gc_get(ret_addr).set_number((double)(~(number_a&number_b)));
+    return ret_addr;
+}
+int nasal_runtime::builtin_not(int local_scope_addr)
+{
+    int a_addr=-1;
+    if(local_scope_addr>=0)
+        a_addr=nasal_vm.gc_get(local_scope_addr).get_closure().get_value_address("a");
+    if(a_addr<0 || nasal_vm.gc_get(a_addr).get_type()!=vm_number)
+    {
+        std::cout<<">> [runtime] builtin_not: cannot find values or wrong value type(must be number)."<<std::endl;
+        ++error;
+        return -1;
+    }
+    int number=(int)nasal_vm.gc_get(a_addr).get_number();
+    int ret_addr=nasal_vm.gc_alloc();
+    nasal_vm.gc_get(ret_addr).set_type(vm_number);
+    nasal_vm.gc_get(ret_addr).set_number((double)(~number));
+    return ret_addr;
+}
 #endif
\ No newline at end of file
diff --git a/version3.0/nasal_runtime.h b/version3.0/nasal_runtime.h
index c0fd848..56dedfe 100644
--- a/version3.0/nasal_runtime.h
+++ b/version3.0/nasal_runtime.h
@@ -10,7 +10,7 @@ enum runtime_returned_state
     rt_exit_without_error
 };
 
-#define BUILTIN_FUNC_NUM 16
+#define BUILTIN_FUNC_NUM 21
 std::string builtin_func_name[BUILTIN_FUNC_NUM]=
 {
     "nasal_call_builtin_std_cout",
@@ -28,7 +28,12 @@ std::string builtin_func_name[BUILTIN_FUNC_NUM]=
     "nasal_call_builtin_trans_num",
     "nasal_call_builtin_pop_back",
     "nasal_call_builtin_trans_str",
-    "nasal_call_builtin_size"
+    "nasal_call_builtin_size",
+    "nasal_call_builtin_xor",
+    "nasal_call_builtin_and",
+    "nasal_call_builtin_or",
+    "nasal_call_builtin_nand",
+    "nasal_call_builtin_not"
 };
 
 class nasal_runtime
@@ -103,6 +108,11 @@ private:
     int builtin_pop(int);
     int builtin_str(int);
     int builtin_size(int);
+    int builtin_xor(int);
+    int builtin_and(int);
+    int builtin_or(int);
+    int builtin_nand(int);
+    int builtin_not(int);
 public:
     nasal_runtime();
     ~nasal_runtime();
@@ -1110,6 +1120,11 @@ int nasal_runtime::call_builtin_function(nasal_ast& node,int local_scope_addr)
         case 13:ret_value_addr=builtin_pop(local_scope_addr);break;
         case 14:ret_value_addr=builtin_str(local_scope_addr);break;
         case 15:ret_value_addr=builtin_size(local_scope_addr);break;
+        case 16:ret_value_addr=builtin_xor(local_scope_addr);break;
+        case 17:ret_value_addr=builtin_and(local_scope_addr);break;
+        case 18:ret_value_addr=builtin_or(local_scope_addr);break;
+        case 19:ret_value_addr=builtin_nand(local_scope_addr);break;
+        case 20:ret_value_addr=builtin_not(local_scope_addr);break;
     }
     return ret_value_addr;
 }