1 /*
   2  * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP
  25 #define CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP
  26 
  27 #include "asm/macroAssembler.hpp"
  28 #include "memory/allocation.hpp"
  29 #ifdef COMPILER1
  30 class LIR_Assembler;
  31 class ShenandoahLoadReferenceBarrierStub;
  32 class StubAssembler;
  33 class StubCodeGenerator;
  34 #endif
  35 
  36 class ShenandoahBarrierSetAssembler : public CHeapObj<mtGC> {
  37 private:
  38 
  39   void resolve_forward_pointer(MacroAssembler* masm, Register dst, Register tmp = noreg);
  40   void resolve_forward_pointer_not_null(MacroAssembler* masm, Register dst, Register tmp = noreg);
  41 
  42   void load_reference_barrier_not_null(MacroAssembler* masm, Register dst);
  43 
  44 public:
  45   static ShenandoahBarrierSetAssembler* bsasm();
  46 
  47   void storeval_barrier(MacroAssembler* masm, Register dst, Register tmp);
  48 
  49 #ifdef COMPILER1
  50   void gen_load_reference_barrier_stub(LIR_Assembler* ce, ShenandoahLoadReferenceBarrierStub* stub);
  51 #endif
  52 
  53   void load_reference_barrier(MacroAssembler* masm, Register dst);
  54 
  55   virtual void cmpxchg_oop(MacroAssembler* masm,
  56                            Register addr, Register expected, Register new_val,
  57                            bool acquire, bool release, bool weak, bool is_cae,
  58                            Register result);
  59 };
  60 
  61 #endif // CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP