src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp

*** 4858,4867 ****
--- 4858,4869 ----
    Label CH1_LOOP, HAS_ZERO, DO1_SHORT, DO1_LOOP, MATCH, NOMATCH, DONE;
    Register cnt1_neg = cnt1;
    Register ch1 = rscratch1;
    Register result_tmp = rscratch2;
  
+   cbz(cnt1, NOMATCH);
+ 
    cmp(cnt1, (u1)4);
    br(LT, DO1_SHORT);
  
    orr(ch, ch, ch, LSL, 16);
    orr(ch, ch, ch, LSL, 32);