diff --git a/src/hotspot/cpu/aarch64/gc/shared/cardTableBarrierSetAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/gc/shared/cardTableBarrierSetAssembler_aarch64.cpp new file mode 100644 index 0000000..bd54f15 --- /dev/null +++ b/src/hotspot/cpu/aarch64/gc/shared/cardTableBarrierSetAssembler_aarch64.cpp @@ -0,0 +1,60 @@ +/* + * 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 "interpreter/interp_masm.hpp" + +#define __ masm-> + +void CardTableBarrierSetAssembler::gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators, + Register start, Register end, Register scratch, RegSet saved_regs) { + + BarrierSet* bs = Universe::heap()->barrier_set(); + CardTableBarrierSet* ctbs = barrier_set_cast(bs); + CardTable* ct = ctbs->card_table(); + assert(sizeof(*ct->byte_map_base()) == sizeof(jbyte), "adjust this code"); + + Label L_loop; + + __ lsr(start, start, CardTable::card_shift); + __ lsr(end, end, CardTable::card_shift); + __ sub(end, end, start); // number of bytes to copy + + const Register count = end; // 'end' register contains bytes count now + __ load_byte_map_base(scratch); + __ add(start, start, scratch); + if (UseConcMarkSweepGC) { + __ membar(__ StoreStore); + } + __ bind(L_loop); + __ strb(zr, Address(start, count)); + __ subs(count, count, 1); + __ br(Assembler::GE, L_loop); +}