Java example source code file (copy_x86.hpp)

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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