1 /*
   2  * Copyright (c) 2003, 2010, 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 CPU_X86_VM_COPY_X86_HPP
  26 #define CPU_X86_VM_COPY_X86_HPP
  27 
  28 // Inline functions for memory copy and fill.
  29 
  30 // Contains inline asm implementations
  31 #ifdef TARGET_OS_ARCH_linux_x86
  32 # include "copy_linux_x86.inline.hpp"
  33 #endif
  34 #ifdef TARGET_OS_ARCH_solaris_x86
  35 # include "copy_solaris_x86.inline.hpp"
  36 #endif
  37 #ifdef TARGET_OS_ARCH_windows_x86
  38 # include "copy_windows_x86.inline.hpp"
  39 #endif
  40 #ifdef TARGET_OS_ARCH_bsd_x86
  41 # include "copy_bsd_x86.inline.hpp"
  42 #endif
  43 
  44 
  45 static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {
  46 #ifdef AMD64
  47   julong* to = (julong*) tohw;
  48   julong  v  = ((julong) value << 32) | value;
  49   while (count-- > 0) {
  50     *to++ = v;
  51   }
  52 #else
  53   juint* to = (juint*)tohw;
  54   count *= HeapWordSize / BytesPerInt;
  55   while (count-- > 0) {
  56     *to++ = value;
  57   }
  58 #endif // AMD64
  59 }
  60 
  61 static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) {
  62   pd_fill_to_words(tohw, count, value);
  63 }
  64 
  65 static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {
  66   (void)memset(to, value, count);
  67 }
  68 
  69 static void pd_zero_to_words(HeapWord* tohw, size_t count) {
  70   pd_fill_to_words(tohw, count, 0);
  71 }
  72 
  73 static void pd_zero_to_bytes(void* to, size_t count) {
  74   (void)memset(to, 0, count);
  75 }
  76 
  77 #endif // CPU_X86_VM_COPY_X86_HPP