1 /*
   2  * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef OS_CPU_LINUX_ARM_VM_COPY_LINUX_ARM_INLINE_HPP
  26 #define OS_CPU_LINUX_ARM_VM_COPY_LINUX_ARM_INLINE_HPP
  27 
  28 static void pd_conjoint_words(const HeapWord* from, HeapWord* to, size_t count) {
  29   _Copy_conjoint_words(from, to, count * HeapWordSize);
  30 }
  31 
  32 static void pd_disjoint_words(const HeapWord* from, HeapWord* to, size_t count) {
  33   _Copy_disjoint_words(from, to, count * HeapWordSize);
  34 }
  35 
  36 static void pd_disjoint_words_atomic(const HeapWord* from, HeapWord* to, size_t count) {
  37   pd_disjoint_words(from, to, count);
  38 }
  39 
  40 static void pd_aligned_conjoint_words(const HeapWord* from, HeapWord* to, size_t count) {
  41   pd_conjoint_words(from, to, count);
  42 }
  43 
  44 static void pd_aligned_disjoint_words(const HeapWord* from, HeapWord* to, size_t count) {
  45   pd_disjoint_words(from, to, count);
  46 }
  47 
  48 static void pd_conjoint_bytes(const void* from, void* to, size_t count) {
  49   memmove(to, from, count);
  50 }
  51 
  52 static void pd_conjoint_bytes_atomic(const void* from, void* to, size_t count) {
  53   pd_conjoint_bytes(from, to, count);
  54 }
  55 
  56 static void pd_conjoint_jshorts_atomic(const jshort* from, jshort* to, size_t count) {
  57   _Copy_conjoint_jshorts_atomic(from, to, count * BytesPerShort);
  58 }
  59 
  60 static void pd_conjoint_jints_atomic(const jint* from, jint* to, size_t count) {
  61 #ifdef AARCH64
  62   _Copy_conjoint_jints_atomic(from, to, count * BytesPerInt);
  63 #else
  64   assert(HeapWordSize == BytesPerInt, "heapwords and jints must be the same size");
  65   // pd_conjoint_words is word-atomic in this implementation.
  66   pd_conjoint_words((const HeapWord*)from, (HeapWord*)to, count);
  67 #endif
  68 }
  69 
  70 static void pd_conjoint_jlongs_atomic(const jlong* from, jlong* to, size_t count) {
  71 #ifdef AARCH64
  72   assert(HeapWordSize == BytesPerLong, "64-bit architecture");
  73   pd_conjoint_words((const HeapWord*)from, (HeapWord*)to, count);
  74 #else
  75   _Copy_conjoint_jlongs_atomic(from, to, count * BytesPerLong);
  76 #endif
  77 }
  78 
  79 static void pd_conjoint_oops_atomic(const oop* from, oop* to, size_t count) {
  80 #ifdef AARCH64
  81   if (UseCompressedOops) {
  82     assert(BytesPerHeapOop == BytesPerInt, "compressed oops");
  83     pd_conjoint_jints_atomic((const jint*)from, (jint*)to, count);
  84   } else {
  85     assert(BytesPerHeapOop == BytesPerLong, "64-bit architecture");
  86     pd_conjoint_jlongs_atomic((const jlong*)from, (jlong*)to, count);
  87   }
  88 #else
  89   assert(BytesPerHeapOop == BytesPerInt, "32-bit architecture");
  90   pd_conjoint_jints_atomic((const jint*)from, (jint*)to, count);
  91 #endif
  92 }
  93 
  94 static void pd_arrayof_conjoint_bytes(const HeapWord* from, HeapWord* to, size_t count) {
  95   pd_conjoint_bytes_atomic((const void*)from, (void*)to, count);
  96 }
  97 
  98 static void pd_arrayof_conjoint_jshorts(const HeapWord* from, HeapWord* to, size_t count) {
  99   pd_conjoint_jshorts_atomic((const jshort*)from, (jshort*)to, count);
 100 }
 101 
 102 static void pd_arrayof_conjoint_jints(const HeapWord* from, HeapWord* to, size_t count) {
 103   pd_conjoint_jints_atomic((const jint*)from, (jint*)to, count);
 104 }
 105 
 106 static void pd_arrayof_conjoint_jlongs(const HeapWord* from, HeapWord* to, size_t count) {
 107   pd_conjoint_jlongs_atomic((const jlong*)from, (jlong*)to, count);
 108 }
 109 
 110 static void pd_arrayof_conjoint_oops(const HeapWord* from, HeapWord* to, size_t count) {
 111   pd_conjoint_oops_atomic((const oop*)from, (oop*)to, count);
 112 }
 113 
 114 #endif // OS_CPU_LINUX_ARM_VM_COPY_LINUX_ARM_INLINE_HPP