1 /*
2 * Copyright (c) 2017, 2018, 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
25 package org.graalvm.compiler.replacements.amd64;
26
27 import org.graalvm.compiler.api.replacements.ClassSubstitution;
28 import org.graalvm.compiler.api.replacements.Fold;
29 import org.graalvm.compiler.api.replacements.Fold.InjectedParameter;
30 import org.graalvm.compiler.api.replacements.MethodSubstitution;
31 import org.graalvm.compiler.nodes.DeoptimizeNode;
32 import org.graalvm.compiler.replacements.nodes.ArrayCompareToNode;
33 import org.graalvm.compiler.word.Word;
34 import jdk.internal.vm.compiler.word.Pointer;
35
36 import jdk.vm.ci.meta.DeoptimizationAction;
37 import jdk.vm.ci.meta.DeoptimizationReason;
38 import jdk.vm.ci.meta.JavaKind;
39 import jdk.vm.ci.meta.MetaAccessProvider;
40
41 // JaCoCo Exclude
42
43 /**
44 * Substitutions for {@code java.lang.StringUTF16} methods.
45 *
46 * Since JDK 9.
47 */
48 @ClassSubstitution(className = "java.lang.StringUTF16", optional = true)
49 public class AMD64StringUTF16Substitutions {
50
51 @Fold
52 static int byteArrayBaseOffset(@InjectedParameter MetaAccessProvider metaAccess) {
53 return metaAccess.getArrayBaseOffset(JavaKind.Byte);
54 }
55
56 @Fold
57 static int byteArrayIndexScale(@InjectedParameter MetaAccessProvider metaAccess) {
58 return metaAccess.getArrayIndexScale(JavaKind.Byte);
59 }
60
61 @Fold
62 static int charArrayBaseOffset(@InjectedParameter MetaAccessProvider metaAccess) {
63 return metaAccess.getArrayBaseOffset(JavaKind.Char);
64 }
65
66 @Fold
67 static int charArrayIndexScale(@InjectedParameter MetaAccessProvider metaAccess) {
68 return metaAccess.getArrayIndexScale(JavaKind.Char);
69 }
70
71 /** Marker value for the {@link InjectedParameter} injected parameter. */
72 static final MetaAccessProvider INJECTED = null;
73
74 /**
75 * @param value is char[]
76 * @param other is char[]
77 */
78 @MethodSubstitution
79 public static int compareTo(byte[] value, byte[] other) {
80 return ArrayCompareToNode.compareTo(value, other, value.length, other.length, JavaKind.Char, JavaKind.Char);
81 }
82
83 /**
84 * @param value is char[]
85 * @param other is byte[]
86 */
87 @MethodSubstitution
88 public static int compareToLatin1(byte[] value, byte[] other) {
89 /*
90 * Swapping array arguments because intrinsic expects order to be byte[]/char[] but kind
91 * arguments stay in original order.
92 */
93 return ArrayCompareToNode.compareTo(other, value, other.length, value.length, JavaKind.Char, JavaKind.Byte);
94 }
95
96 @MethodSubstitution(optional = true)
97 public static int indexOfCharUnsafe(byte[] value, int ch, int fromIndex, int max) {
98 Pointer sourcePointer = Word.objectToTrackedPointer(value).add(byteArrayBaseOffset(INJECTED)).add(fromIndex * charArrayIndexScale(INJECTED));
99 int result = AMD64ArrayIndexOf.indexOf1Char(sourcePointer, max - fromIndex, (char) ch);
100 if (result != -1) {
101 return result + fromIndex;
102 }
103 return result;
104 }
105
106 /**
107 * Intrinsic for {@code java.lang.StringUTF16.compress([CI[BII)I}.
108 *
109 * <pre>
110 * @HotSpotIntrinsicCandidate
111 * public static int compress(char[] src, int src_indx, byte[] dst, int dst_indx, int len)
112 * </pre>
113 */
114 @MethodSubstitution
115 public static int compress(char[] src, int srcIndex, byte[] dest, int destIndex, int len) {
116 if (len < 0 || srcIndex < 0 || (srcIndex + len > src.length) || destIndex < 0 || (destIndex + len > dest.length)) {
117 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.BoundsCheckException);
118 }
119
120 Pointer srcPointer = Word.objectToTrackedPointer(src).add(charArrayBaseOffset(INJECTED)).add(srcIndex * charArrayIndexScale(INJECTED));
121 Pointer destPointer = Word.objectToTrackedPointer(dest).add(byteArrayBaseOffset(INJECTED)).add(destIndex * byteArrayIndexScale(INJECTED));
122 return AMD64StringUTF16CompressNode.compress(srcPointer, destPointer, len, JavaKind.Char);
123 }
124
125 /**
126 * Intrinsic for {@code }java.lang.StringUTF16.compress([BI[BII)I}.
127 *
128 * <pre>
129 * @HotSpotIntrinsicCandidate
130 * public static int compress(byte[] src, int src_indx, byte[] dst, int dst_indx, int len)
131 * </pre>
132 *
133 * In this variant {@code dest} refers to a byte array containing 2 byte per char so
134 * {@code srcIndex} and {@code len} are in terms of char elements and have to be scaled by 2
135 * when referring to {@code src}.
136 */
137 @MethodSubstitution
138 public static int compress(byte[] src, int srcIndex, byte[] dest, int destIndex, int len) {
139 if (len < 0 || srcIndex < 0 || (srcIndex * 2 + len * 2 > src.length) || destIndex < 0 || (destIndex + len > dest.length)) {
140 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.BoundsCheckException);
141 }
142
143 Pointer srcPointer = Word.objectToTrackedPointer(src).add(byteArrayBaseOffset(INJECTED)).add(srcIndex * 2 * byteArrayIndexScale(INJECTED));
144 Pointer destPointer = Word.objectToTrackedPointer(dest).add(byteArrayBaseOffset(INJECTED)).add(destIndex * byteArrayIndexScale(INJECTED));
145 return AMD64StringUTF16CompressNode.compress(srcPointer, destPointer, len, JavaKind.Byte);
146 }
147
148 }