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Java example source code file (copy_x86.hpp)

This example Java source code file (copy_x86.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

amd64, bytesperint, cpu_x86_vm_copy_x86_hpp, heapwordsize, target_os_arch_bsd_x86, target_os_arch_linux_x86, target_os_arch_solaris_x86, target_os_arch_windows_x86

The copy_x86.hpp Java example source code

/*
 * Copyright (c) 2003, 2010, 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 CPU_X86_VM_COPY_X86_HPP
#define CPU_X86_VM_COPY_X86_HPP

// Inline functions for memory copy and fill.

// Contains inline asm implementations
#ifdef TARGET_OS_ARCH_linux_x86
# include "copy_linux_x86.inline.hpp"
#endif
#ifdef TARGET_OS_ARCH_solaris_x86
# include "copy_solaris_x86.inline.hpp"
#endif
#ifdef TARGET_OS_ARCH_windows_x86
# include "copy_windows_x86.inline.hpp"
#endif
#ifdef TARGET_OS_ARCH_bsd_x86
# include "copy_bsd_x86.inline.hpp"
#endif


static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {
#ifdef AMD64
  julong* to = (julong*) tohw;
  julong  v  = ((julong) value << 32) | value;
  while (count-- > 0) {
    *to++ = v;
  }
#else
  juint* to = (juint*)tohw;
  count *= HeapWordSize / BytesPerInt;
  while (count-- > 0) {
    *to++ = value;
  }
#endif // AMD64
}

static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) {
  pd_fill_to_words(tohw, count, value);
}

static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {
  (void)memset(to, value, count);
}

static void pd_zero_to_words(HeapWord* tohw, size_t count) {
  pd_fill_to_words(tohw, count, 0);
}

static void pd_zero_to_bytes(void* to, size_t count) {
  (void)memset(to, 0, count);
}

#endif // CPU_X86_VM_COPY_X86_HPP

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