diff --git a/src/vm/llvm/vm_tgc5c.cpp b/src/vm/llvm/vm_tgc5c.cpp
index 1aafb8b..9970704 100644
--- a/src/vm/llvm/vm_tgc5c.cpp
+++ b/src/vm/llvm/vm_tgc5c.cpp
@@ -2553,9 +2553,8 @@ private:
         
         this->gen_instr_prologue();
         /*generate behavior*/
-        auto wait_arg0 = this->gen_const(8,1);
         std::vector<Value*> wait_args{
-            wait_arg0
+            this->gen_ext(this->gen_const(8,1), 32)
         };
         this->builder.CreateCall(this->mod->getFunction("wait"), wait_args);
         bb = BasicBlock::Create(this->mod->getContext(), "entry", this->func, this->leave_blk);
@@ -2719,7 +2718,7 @@ private:
                 csr,
                 this->builder.CreateAnd(
                    xrd,
-                   this->builder.CreateNeg(xrs1))
+                   this->builder.CreateNot(xrs1))
                 );
             }
             if(rd!=0) {