src/cpu/aarch64/vm/aarch64.ad

rev 12379 : 8162338: AArch64: Intrinsify fused mac operations
Reviewed-by:
rev 12700 : 8176506: C2: loop unswitching and unsafe accesses cause crash
Reviewed-by:

@@ -15383,13 +15383,11 @@
 
   ins_cost(CALL_COST);
   format %{ "ShouldNotReachHere" %}
 
   ins_encode %{
-    // TODO
-    // implement proper trap call here
-    __ brk(999);
+    __ halt();
   %}
 
   ins_pipe(pipe_class_default);
 %}