src/hotspot/cpu/aarch64/assembler_aarch64.hpp

*** 1134,10 ***
--- 1134,14 ---
  
    void isb() {
      system(0b00, 0b011, 0b00011, SY, 0b110);
    }
  
+   void sb() {
+     system(0b00, 0b011, 0b00011, 0b0000, 0b111);
+   }
+ 
    void sys(int op1, int CRn, int CRm, int op2,
             Register rt = as_Register(0b11111)) {
      system(0b01, op1, CRn, CRm, op2, rt);
    }