/*

 * Copyright (c) 2018, 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 "precompiled.hpp"

#include "asm/macroAssembler.inline.hpp"

#include "gc/shared/modRefBarrierSetAssembler.hpp"

#define __ masm->

void ModRefBarrierSetAssembler::arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,

                                                   Register src, Register dst, Register count) {

  bool checkcast = (decorators & ARRAYCOPY_CHECKCAST) != 0;

  bool disjoint = (decorators & ARRAYCOPY_DISJOINT) != 0;

  bool obj_int = type == T_OBJECT LP64_ONLY(&& UseCompressedOops);

  if (type == T_OBJECT || type == T_ARRAY) {

#ifdef _LP64

    if (!checkcast && !obj_int) {

      // Save count for barrier

      __ movptr(r11, count);

    } else if (disjoint && obj_int) {

      // Save dst in r11 in the disjoint case

      __ movq(r11, dst);

    }

#else

    if (disjoint) {

      __ mov(rdx, dst);          // save 'to'

    }

#endif

    gen_write_ref_array_pre_barrier(masm, decorators, dst, count);

  }

}

void ModRefBarrierSetAssembler::arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,

                                                   Register src, Register dst, Register count) {

  bool checkcast = (decorators & ARRAYCOPY_CHECKCAST) != 0;

  bool disjoint = (decorators & ARRAYCOPY_DISJOINT) != 0;

  bool obj_int = type == T_OBJECT LP64_ONLY(&& UseCompressedOops);

  Register tmp = rax;

  if (type == T_OBJECT || type == T_ARRAY) {

#ifdef _LP64

    if (!checkcast && !obj_int) {

      // Save count for barrier

      count = r11;

    } else if (disjoint && obj_int) {

      // Use the saved dst in the disjoint case

      dst = r11;

    } else if (checkcast) {

      tmp = rscratch1;

    }

#else

    if (disjoint) {

      __ mov(dst, rdx); // restore 'to'

    }

#endif

    gen_write_ref_array_post_barrier(masm, decorators, dst, count, tmp);

  }

}