diff -r 169aeeac1fba -r a9451177555c src/cpu/mips/vm/mips_64.ad
--- a/src/cpu/mips/vm/mips_64.ad	Wed Feb 05 00:26:59 2020 +0800
+++ b/src/cpu/mips/vm/mips_64.ad	Thu Feb 13 19:16:02 2020 +0800
@@ -14168,7 +14168,7 @@
       __ stop("in storeIConditional: index != 0");
     } else {
       __ bind(again);
-      if(UseSyncLevel >= 3000 || UseSyncLevel < 2000) __ sync();
+      if (UseSyncLevel >= 10000 || UseSyncLevel == 1000 || UseSyncLevel == 4000) __ sync();
       __ ll(AT, addr);
       __ bne(AT, oldval, failure);
       __ delayed()->addu(AT, R0, R0);