1/*
2 * Copyright (c) 2018, 2019, 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#include "precompiled.hpp"
25#include "gc/z/zArguments.hpp"
26#include "runtime/globals.hpp"
27#include "runtime/globals_extension.hpp"
28#include "utilities/debug.hpp"
29
30void ZArguments::initialize_platform() {
31#ifdef COMPILER2
32 // The C2 barrier slow path expects vector registers to be least
33 // 16 bytes wide, which is the minimum width available on all
34 // x86-64 systems. However, the user could have speficied a lower
35 // number on the command-line, in which case we print a warning
36 // and raise it to 16.
37 if (MaxVectorSize < 16) {
38 warning("ZGC requires MaxVectorSize to be at least 16");
39 FLAG_SET_DEFAULT(MaxVectorSize, 16);
40 }
41#endif
42}
43