--- old/src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp	2020-07-08 13:30:52.458716551 +0800
+++ new/src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp	2020-07-08 13:30:52.202715089 +0800
@@ -606,6 +606,16 @@
 
   void array_overlap_test(Label& L_no_overlap, Address::sxtw sf) { __ b(L_no_overlap); }
 
+  // Generate indices for iota vector.
+  address generate_iota_indices(const char *stub_name) {
+    __ align(CodeEntryAlignment);
+    StubCodeMark mark(this, "StubRoutines", stub_name);
+    address start = __ pc();
+    __ emit_data64(0x0706050403020100, relocInfo::none);
+    __ emit_data64(0x0F0E0D0C0B0A0908, relocInfo::none);
+    return start;
+  }
+
   // The inner part of zero_words().  This is the bulk operation,
   // zeroing words in blocks, possibly using DC ZVA to do it.  The
   // caller is responsible for zeroing the last few words.
@@ -5779,6 +5789,8 @@
                                                 SharedRuntime::
                                                 throw_NullPointerException_at_call));
 
+    StubRoutines::aarch64::_vector_iota_indices    = generate_iota_indices("iota_indices");
+
     // arraycopy stubs used by compilers
     generate_arraycopy_stubs();