416 

   417   Label L_done, L_throw_exception;

   418   const Register con_klass_temp = rcx;  // same as cache

   419   const Register array_klass_temp = rdx;  // same as index

   420   __ movptr(con_klass_temp, Address(rax, oopDesc::klass_offset_in_bytes()));

   421   __ lea(array_klass_temp, ExternalAddress((address)Universe::systemObjArrayKlassObj_addr()));

   422   __ cmpptr(con_klass_temp, Address(array_klass_temp, 0));

   423   __ jcc(Assembler::notEqual, L_done);

   424   __ cmpl(Address(rax, arrayOopDesc::length_offset_in_bytes()), 0);

   425   __ jcc(Assembler::notEqual, L_throw_exception);

   426   __ xorptr(rax, rax);

   427   __ jmp(L_done);

   428 

   429   // Load the exception from the system-array which wraps it:

   430   __ bind(L_throw_exception);

   431   __ movptr(rax, Address(rax, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));

   432   __ jump(ExternalAddress(Interpreter::throw_exception_entry()));

   433 

   434   __ bind(L_done);