--- old/src/cpu/ppc/vm/macroAssembler_ppc.cpp	2017-05-19 12:38:14.072129000 +0200
+++ new/src/cpu/ppc/vm/macroAssembler_ppc.cpp	2017-05-19 12:38:13.919098000 +0200
@@ -2521,7 +2521,13 @@
   load_const_optimized(rtm_counters_Reg, (address)rtm_counters, R0); // reload
   bind(L_check_always_rtm2);
   ld(tmpReg, RTMLockingCounters::total_count_offset(), rtm_counters_Reg);
-  cmpdi(CCR0, tmpReg, RTMLockingThreshold / RTMTotalCountIncrRate);
+  int64_t thresholdValue = RTMLockingThreshold / RTMTotalCountIncrRate;
+  if (is_simm(thresholdValue, 16)) {   // cmpdi can handle 16bit immediate only.
+    cmpdi(CCR0, tmpReg, thresholdValue);
+  } else {
+    load_const_optimized(R0, thresholdValue);
+    cmpd(CCR0, tmpReg, R0);
+  }
   blt(CCR0, L_done);
   if (method_data != NULL) {
     // Set rtm_state to "always rtm" in MDO.