1 /*
   2  * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "asm/macroAssembler.inline.hpp"
  27 #include "gc/shared/modRefBarrierSetAssembler.hpp"
  28 
  29 #define __ masm->
  30 
  31 void ModRefBarrierSetAssembler::arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  32                                                    Register src, Register dst, Register count) {
  33   if (type == T_OBJECT) {
  34     bool checkcast = (decorators & ARRAYCOPY_CHECKCAST) != 0;
  35     if (!checkcast) {
  36       // save arguments for barrier generation
  37       __ mov(dst, G1);
  38       __ mov(count, G5);
  39       gen_write_ref_array_pre_barrier(masm, decorators, G1, G5);
  40     } else {
  41       gen_write_ref_array_pre_barrier(masm, decorators, dst, count);
  42     }
  43   }
  44 }
  45 
  46 void ModRefBarrierSetAssembler::arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  47                                                    Register src, Register dst, Register count) {
  48   if (type == T_OBJECT) {
  49     bool checkcast = (decorators & ARRAYCOPY_CHECKCAST) != 0;
  50     if (!checkcast) {
  51       // O0 is used as temp register
  52       gen_write_ref_array_post_barrier(masm, decorators, G1, G5, O0);
  53     } else {
  54       gen_write_ref_array_post_barrier(masm, decorators, dst, count, O3);
  55     }
  56   }
  57 }
  58 
  59 void ModRefBarrierSetAssembler::store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  60                                          Register val, Address dst, Register tmp) {
  61   if (is_reference_type(type)) {
  62     oop_store_at(masm, decorators, type, val, dst, tmp);
  63   } else {
  64     BarrierSetAssembler::store_at(masm, decorators, type, val, dst, tmp);
  65   }
  66 }