*** old/src/cpu/x86/vm/assembler_x86.hpp	Thu Sep 11 23:19:41 2014
--- new/src/cpu/x86/vm/assembler_x86.hpp	Thu Sep 11 23:19:41 2014

*** 1003,1012 ****
--- 1003,1013 ----
  
    void cmpw(Address dst, int imm16);
  
    void cmpxchg8 (Address adr);
  
+   void cmpxchgb(Register reg, Address adr);
    void cmpxchgl(Register reg, Address adr);
  
    void cmpxchgq(Register reg, Address adr);
  
    // Ordered Compare Scalar Double-Precision Floating-Point Values and set EFLAGS