/*
 * Copyright (c) 2008, 2013, 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.
 *
 */

#ifndef OS_CPU_LINUX_ARM_VM_COPY_LINUX_ARM_INLINE_HPP
#define OS_CPU_LINUX_ARM_VM_COPY_LINUX_ARM_INLINE_HPP

static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
#ifdef AARCH64
  _Copy_conjoint_words(from, to, count * HeapWordSize);
#else
   // NOTE: _Copy_* functions on 32-bit ARM expect "to" and "from" arguments in reversed order
  _Copy_conjoint_words(to, from, count * HeapWordSize);
#endif
}

static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
#ifdef AARCH64
  _Copy_disjoint_words(from, to, count * HeapWordSize);
#else
  _Copy_disjoint_words(to, from, count * HeapWordSize);
#endif // AARCH64
}

static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) {
  pd_disjoint_words(from, to, count);
}

static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
  pd_conjoint_words(from, to, count);
}

static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
  pd_disjoint_words(from, to, count);
}

static void pd_conjoint_bytes(void* from, void* to, size_t count) {
  memmove(to, from, count);
}

static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) {
  pd_conjoint_bytes(from, to, count);
}

static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {
#ifdef AARCH64
  _Copy_conjoint_jshorts_atomic(from, to, count * BytesPerShort);
#else
  _Copy_conjoint_jshorts_atomic(to, from, count * BytesPerShort);
#endif
}

static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {
#ifdef AARCH64
  _Copy_conjoint_jints_atomic(from, to, count * BytesPerInt);
#else
  assert(HeapWordSize == BytesPerInt, "heapwords and jints must be the same size");
  // pd_conjoint_words is word-atomic in this implementation.
  pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count);
#endif
}

static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {
#ifdef AARCH64
  assert(HeapWordSize == BytesPerLong, "64-bit architecture");
  pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count);
#else
  _Copy_conjoint_jlongs_atomic(to, from, count * BytesPerLong);
#endif
}

static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) {
#ifdef AARCH64
  if (UseCompressedOops) {
    assert(BytesPerHeapOop == BytesPerInt, "compressed oops");
    pd_conjoint_jints_atomic((jint*)from, (jint*)to, count);
  } else {
    assert(BytesPerHeapOop == BytesPerLong, "64-bit architecture");
    pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
  }
#else
  assert(BytesPerHeapOop == BytesPerInt, "32-bit architecture");
  pd_conjoint_jints_atomic((jint*)from, (jint*)to, count);
#endif
}

static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) {
  pd_conjoint_bytes_atomic((void*)from, (void*)to, count);
}

static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) {
  pd_conjoint_jshorts_atomic((jshort*)from, (jshort*)to, count);
}

static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) {
  pd_conjoint_jints_atomic((jint*)from, (jint*)to, count);
}

static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) {
  pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
}

static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) {
  pd_conjoint_oops_atomic((oop*)from, (oop*)to, count);
}

#endif // OS_CPU_LINUX_ARM_VM_COPY_LINUX_ARM_INLINE_HPP