1 /*

     2  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2009 Red Hat, Inc.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    25 

    26 #include "precompiled.hpp"

    27 #include "assembler_zero.inline.hpp"

    28 #include "memory/resourceArea.hpp"

    29 #include "runtime/java.hpp"

    30 #include "runtime/stubCodeGenerator.hpp"

    31 #include "vm_version_zero.hpp"

    32 

    33 

    34 void VM_Version::initialize() {

    35   // This machine does not allow unaligned memory accesses

    36   if (! FLAG_IS_DEFAULT(UseUnalignedAccesses)) {

    37     warning("Unaligned memory access is not available on this CPU");

    38     FLAG_SET_DEFAULT(UseUnalignedAccesses, false);

    39   }

    40   // Disable prefetching for Zero

    41   if (! FLAG_IS_DEFAULT(AllocatePrefetchDistance)) {

    42     warning("Prefetching is not available for a Zero VM");

    43   }

    44   FLAG_SET_DEFAULT(AllocatePrefetchDistance, 0);

    45 }