--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/arm/gc/shared/cardTableBarrierSetAssembler_arm.cpp	Wed Mar 21 14:38:32 2018 +0100
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "asm/macroAssembler.inline.hpp"
+#include "gc/shared/barrierSet.hpp"
+#include "gc/shared/cardTable.hpp"
+#include "gc/shared/cardTableBarrierSet.hpp"
+#include "gc/shared/cardTableBarrierSetAssembler.hpp"
+#include "gc/shared/collectedHeap.hpp"
+#include "runtime/globals.hpp"
+
+#define __ masm->
+
+#ifdef PRODUCT
+#define BLOCK_COMMENT(str) /* nothing */
+#else
+#define BLOCK_COMMENT(str) __ block_comment(str)
+#endif
+
+#define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
+
+void CardTableBarrierSetAssembler::gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators,
+                                                                    Register addr, Register count, Register tmp) {
+  BLOCK_COMMENT("CardTablePostBarrier");
+  CardTableBarrierSet* ctbs = barrier_set_cast<CardTableBarrierSet>(bs);
+  CardTable* ct = ctbs->card_table();
+  assert(sizeof(*ct->byte_map_base()) == sizeof(jbyte), "adjust this code");
+
+  Label L_cardtable_loop, L_done;
+
+  __ cbz_32(count, L_done); // zero count - nothing to do
+
+  __ add_ptr_scaled_int32(count, addr, count, LogBytesPerHeapOop);
+  __ sub(count, count, BytesPerHeapOop);                            // last addr
+
+  __ logical_shift_right(addr, addr, CardTable::card_shift);
+  __ logical_shift_right(count, count, CardTable::card_shift);
+  __ sub(count, count, addr); // nb of cards
+
+  // warning: Rthread has not been preserved
+  __ mov_address(tmp, (address) ct->byte_map_base(), symbolic_Relocation::card_table_reference);
+  __ add(addr,tmp, addr);
+
+  Register zero = __ zero_register(tmp);
+
+  __ BIND(L_cardtable_loop);
+  __ strb(zero, Address(addr, 1, post_indexed));
+  __ subs(count, count, 1);
+  __ b(L_cardtable_loop, ge);
+  __ BIND(L_done);
+}