src/cpu/x86/vm/register_x86.hpp

*** 163,172 ****
--- 163,173 ----
  
    // accessors
    int   encoding() const                          { assert(is_valid(), err_msg("invalid register (%d)", (int)(intptr_t)this )); return (intptr_t)this; }
    bool  is_valid() const                          { return 0 <= (intptr_t)this && (intptr_t)this < number_of_registers; }
    const char* name() const;
+   const char* sub_word_name(int offset) const;
  };
  
  
  // The XMM registers, for P3 and up chips
  CONSTANT_REGISTER_DECLARATION(XMMRegister, xnoreg , (-1));