1 /*
2 * Copyright (c) 1997, 2020, 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 "asm/assembler.inline.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "runtime/arguments.hpp"
30 #include "runtime/globals_extension.hpp"
31 #include "runtime/java.hpp"
32 #include "runtime/stubCodeGenerator.hpp"
33 #include "runtime/vm_version.hpp"
34
35
36 void VM_Version::initialize() {
37 // This machine does not allow unaligned memory accesses
38 if (! FLAG_IS_DEFAULT(UseUnalignedAccesses)) {
39 warning("Unaligned memory access is not available on this CPU");
40 FLAG_SET_DEFAULT(UseUnalignedAccesses, false);
41 }
42 // Disable prefetching for Zero
43 if (! FLAG_IS_DEFAULT(AllocatePrefetchDistance)) {
44 warning("Prefetching is not available for a Zero VM");
45 }
46 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 0);
47
48 // If lock diagnostics is needed, always call to runtime
49 if (DiagnoseSyncOnValueBasedClasses != 0) {
50 FLAG_SET_DEFAULT(UseHeavyMonitors, true);
51 }
52
53 if (UseAESIntrinsics) {
54 warning("AES intrinsics are not available on this CPU");
55 FLAG_SET_DEFAULT(UseAESIntrinsics, false);
56 }
57
58 if (UseAES) {
59 warning("AES instructions are not available on this CPU");
60 FLAG_SET_DEFAULT(UseAES, false);
61 }
62
63 if (UseAESCTRIntrinsics) {
64 warning("AES/CTR intrinsics are not available on this CPU");
65 FLAG_SET_DEFAULT(UseAESCTRIntrinsics, false);
66 }
67
68 if (UseFMA) {
69 warning("FMA instructions are not available on this CPU");
70 FLAG_SET_DEFAULT(UseFMA, false);
71 }
72
73 if (UseMD5Intrinsics) {
74 warning("MD5 intrinsics are not available on this CPU");
75 FLAG_SET_DEFAULT(UseMD5Intrinsics, false);
76 }
77
78 if (UseSHA) {
79 warning("SHA instructions are not available on this CPU");
80 FLAG_SET_DEFAULT(UseSHA, false);
81 }
82
83 if (UseSHA1Intrinsics) {
84 warning("Intrinsics for SHA-1 crypto hash functions not available on this CPU.");
85 FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);
86 }
87
88 if (UseSHA256Intrinsics) {
89 warning("Intrinsics for SHA-224 and SHA-256 crypto hash functions not available on this CPU.");
90 FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
91 }
92
93 if (UseSHA512Intrinsics) {
94 warning("Intrinsics for SHA-384 and SHA-512 crypto hash functions not available on this CPU.");
95 FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);
96 }
97
98 if (UseSHA3Intrinsics) {
99 warning("Intrinsics for SHA3-224, SHA3-256, SHA3-384 and SHA3-512 crypto hash functions not available on this CPU.");
100 FLAG_SET_DEFAULT(UseSHA3Intrinsics, false);
101 }
102
103 if (UseCRC32Intrinsics) {
104 warning("CRC32 intrinsics are not available on this CPU");
105 FLAG_SET_DEFAULT(UseCRC32Intrinsics, false);
106 }
107
108 if (UseAdler32Intrinsics) {
109 warning("Adler32 intrinsics are not available on this CPU");
110 FLAG_SET_DEFAULT(UseAdler32Intrinsics, false);
111 }
112
113 if (UseVectorizedMismatchIntrinsic) {
114 warning("vectorizedMismatch intrinsic is not available on this CPU.");
115 FLAG_SET_DEFAULT(UseVectorizedMismatchIntrinsic, false);
116 }
117
118 if ((LockingMode != LM_LEGACY) && (LockingMode != LM_MONITOR)) {
119 warning("Unsupported locking mode for this CPU.");
120 FLAG_SET_DEFAULT(LockingMode, LM_LEGACY);
121 }
122
123 // Not implemented
124 UNSUPPORTED_OPTION(CriticalJNINatives);
125 UNSUPPORTED_OPTION(UseCompiler);
126 #ifdef ASSERT
127 UNSUPPORTED_OPTION(CountCompiledCalls);
128 #endif
129 }