--- a/src/hotspot/cpu/x86/macroAssembler_x86.hpp	Tue Aug 14 17:21:44 2018 -0700
+++ b/src/hotspot/cpu/x86/macroAssembler_x86.hpp	Wed Aug 15 00:48:12 2018 -0700
@@ -478,6 +478,10 @@
   // from register xmm0. Otherwise, the value is stored from the FPU stack.
   void store_double(Address dst);
 
+  // Save/restore ZMM (512bit) register on stack.
+  void push_zmm(XMMRegister reg);
+  void pop_zmm(XMMRegister reg);
+
   // pushes double TOS element of FPU stack on CPU stack; pops from FPU stack
   void push_fTOS();