1 /*
 2  * Copyright (c) 2018, 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/modRefBSCodeGen.hpp"
28 
29 #define __ masm->
30 
31 void ModRefBSCodeGen::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 ModRefBSCodeGen::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 }