/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#include "gc/shared/barrierSetCodeGen.hpp"
#include "interpreter/interp_masm.hpp"

#define __ masm->

void BarrierSetCodeGen::store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
                                 Register base, Register index, int offset, Register val, Register tmp) {
  bool on_heap = (decorators & ACCESS_ON_HEAP) != 0;
  bool on_root = (decorators & ACCESS_ON_ROOT) != 0;

  switch (type) {
  case T_ARRAY:
  case T_OBJECT: {
    if (on_heap) {
      if (index == noreg ) {
        if (Assembler::is_simm13(offset)) {
          __ store_heap_oop(val, base, offset);
        } else {
          __ set(offset, tmp);
          __ store_heap_oop(val, base, tmp);
        }
      } else {
        assert(offset == 0, "not implemented yet");
        __ store_heap_oop(val, base, index);
      }
    } else {
      assert(on_root, "why else?");
      assert(Assembler::is_simm13(offset), "not supported yet");
      assert(index == noreg, "not supported yet");
      __ st_ptr(val, base, offset);
    }
    break;
  }
  default: Unimplemented();
  }
}

void BarrierSetCodeGen::load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
                                Register base, Register index, int offset, Register dst, Register tmp) {
  bool on_heap = (decorators & ACCESS_ON_HEAP) != 0;
  bool on_root = (decorators & ACCESS_ON_ROOT) != 0;

  switch (type) {
  case T_ARRAY:
  case T_OBJECT: {
    if (on_heap) {
      if (index == noreg ) {
        if (Assembler::is_simm13(offset)) {
          __ load_heap_oop(base, offset, dst);
        } else {
          __ set(offset, tmp);
          __ load_heap_oop(base, tmp, dst);
        }
      } else {
        assert(offset == 0, "not implemented yet");
        __ load_heap_oop(base, index, dst);
      }
    } else {
      assert(on_root, "why else?");
      assert(Assembler::is_simm13(offset), "not supported yet");
      assert(index == noreg, "not supported yet");
      __ ld_ptr(base, offset, dst);
    }
    break;
  }
  default: Unimplemented();
  }
}