1 /*
 2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
 3  * Copyright (c) 2018, SAP SE. All rights reserved.
 4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 5  *
 6  * This code is free software; you can redistribute it and/or modify it
 7  * under the terms of the GNU General Public License version 2 only, as
 8  * published by the Free Software Foundation.
 9  *
10  * This code is distributed in the hope that it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13  * version 2 for more details (a copy is included in the LICENSE file that
14  * accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License version
17  * 2 along with this work; if not, write to the Free Software Foundation,
18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19  *
20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21  * or visit www.oracle.com if you need additional information or have any
22  * questions.
23  *
24  */
25 
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "gc/shared/modRefBSCodeGen.hpp"
29 
30 #define __ masm->
31 
32 void ModRefBSCodeGen::arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
33                                          Register src, Register dst, Register count, Register preserve1, Register preserve2) {
34   if (type == T_OBJECT) {
35     gen_write_ref_array_pre_barrier(masm, decorators, src, dst, count, preserve1, preserve2);
36 
37     bool checkcast = (decorators & ARRAYCOPY_CHECKCAST) != 0;
38     if (!checkcast) {
39       assert_different_registers(dst, count, R9_ARG7, R10_ARG8);
40       // Save some arguments for epilogue, e.g. disjoint_long_copy_core destroys them.
41       __ mr(R9_ARG7, dst);
42       __ mr(R10_ARG8, count);
43     }
44   }
45 }
46 
47 void ModRefBSCodeGen::arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
48                                          Register dst, Register count, Register preserve) {
49   if (type == T_OBJECT) {
50     bool checkcast = (decorators & ARRAYCOPY_CHECKCAST) != 0;
51     if (!checkcast) {
52       gen_write_ref_array_post_barrier(masm, decorators, R9_ARG7, R10_ARG8, preserve);
53     } else {
54       gen_write_ref_array_post_barrier(masm, decorators, dst, count, preserve);
55     }
56   }
57 }