1 /*
 2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
 3  * Copyright (c) 2020, 2021, Huawei Technologies Co., Ltd. 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
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25 
26 #ifndef CPU_RISCV_GC_SHARED_MODREFBARRIERSETASSEMBLER_RISCV_HPP
27 #define CPU_RISCV_GC_SHARED_MODREFBARRIERSETASSEMBLER_RISCV_HPP
28 
29 #include "asm/macroAssembler.hpp"
30 #include "gc/shared/barrierSetAssembler.hpp"
31 
32 // The ModRefBarrierSetAssembler filters away accesses on BasicTypes other
33 // than T_OBJECT/T_ARRAY (oops). The oop accesses call one of the protected
34 // accesses, which are overridden in the concrete BarrierSetAssembler.
35 
36 class ModRefBarrierSetAssembler: public BarrierSetAssembler {
37 protected:
38   virtual void gen_write_ref_array_pre_barrier(MacroAssembler* masm, DecoratorSet decorators,
39                                                Register addr, Register count, RegSet saved_regs) {}
40   virtual void gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators,
41                                                 Register start, Register count, Register tmp, RegSet saved_regs) {}
42 
43   virtual void oop_store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
44                             Address dst, Register val, Register tmp1, Register tmp2) = 0;
45 
46 public:
47   virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
48                                   Register src, Register dst, Register count, RegSet saved_regs);
49   virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
50                                   Register start, Register count, Register tmp, RegSet saved_regs);
51   virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
52                         Address dst, Register val, Register tmp1, Register tmp2);
53 };
54 
55 #endif // CPU_RISCV_GC_SHARED_MODREFBARRIERSETASSEMBLER_RISCV_HPP