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comparison jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/Location.java @ 22672:1bbd4a7c274b

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Rename jdk.internal.jvmci to jdk.vm.ci
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Thu, 08 Oct 2015 17:28:41 -0700
parents jvmci/jdk.internal.jvmci.code/src/jdk/internal/jvmci/code/Location.java@ae67bd822493
children 3e8ce13f4e12
comparison
equal deleted inserted replaced
22671:97f30e4d0e95 22672:1bbd4a7c274b
1 /*
2 * Copyright (c) 2015, 2015, 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 package jdk.vm.ci.code;
24
25 /**
26 * Represents a location where a value can be stored. This can be either a {@link Register} or a
27 * stack slot.
28 */
29 public final class Location {
30
31 public final Register reg;
32 public final int offset;
33
34 private Location(Register reg, int offset) {
35 this.reg = reg;
36 this.offset = offset;
37 }
38
39 /**
40 * Create a {@link Location} for a register.
41 */
42 public static Location register(Register reg) {
43 return new Location(reg, 0);
44 }
45
46 /**
47 * Create a {@link Location} for a vector subregister.
48 *
49 * @param reg the {@link Register vector register}
50 * @param offset the offset in bytes into the vector register
51 */
52 public static Location subregister(Register reg, int offset) {
53 return new Location(reg, offset);
54 }
55
56 /**
57 * Create a {@link Location} for a stack slot.
58 */
59 public static Location stack(int offset) {
60 return new Location(null, offset);
61 }
62
63 public boolean isRegister() {
64 return reg != null;
65 }
66
67 public boolean isStack() {
68 return reg == null;
69 }
70
71 @Override
72 public String toString() {
73 String regName;
74 if (isRegister()) {
75 regName = reg.name + ":";
76 } else {
77 regName = "stack:";
78 }
79 return regName + offset;
80 }
81 }