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 #ifndef CPU_S390_GC_G1_G1BARRIERSETASSEMBLER_S390_HPP
27 #define CPU_S390_GC_G1_G1BARRIERSETASSEMBLER_S390_HPP
28 
29 #include "asm/macroAssembler.hpp"
30 #include "gc/shared/modRefBarrierSetAssembler.hpp"
31 
32 class G1BarrierSetAssembler: public ModRefBarrierSetAssembler {
33  protected:
34   virtual void gen_write_ref_array_pre_barrier(MacroAssembler* masm, DecoratorSet decorators, Register addr, Register count);
35   virtual void gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators, Register addr, Register count,
36                                                 bool do_return);
37 
38   void g1_write_barrier_pre(MacroAssembler*    masm, DecoratorSet decorators,
39                             const Address*     obj,           // Address of oop or NULL if pre-loaded.
40                             Register           Rpre_val,      // Ideally, this is a non-volatile register.
41                             Register           Rval,          // Will be preserved.
42                             Register           Rtmp1,         // If Rpre_val is volatile, either Rtmp1
43                             Register           Rtmp2,         // or Rtmp2 has to be non-volatile.
44                             bool               pre_val_needed); // Save Rpre_val across runtime call, caller uses it.
45 
46   void g1_write_barrier_post(MacroAssembler* masm, DecoratorSet decorators, Register Rstore_addr, Register Rnew_val,
47                              Register Rtmp1, Register Rtmp2, Register Rtmp3);
48 
49   virtual void oop_store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
50                             const Address& dst, Register val, Register tmp1, Register tmp2, Register tmp3);
51 
52  public:
53   virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
54                        const Address& src, Register dst, Register tmp1, Register tmp2, Label *is_null = NULL);
55 
56   virtual void resolve_jobject(MacroAssembler* masm, Register value, Register tmp1, Register tmp2);
57 };
58 
59 #endif // CPU_S390_GC_G1_G1BARRIERSETASSEMBLER_S390_HPP