Mercurial > hg > graal-compiler
comparison graal/com.oracle.jvmci.asm.sparc/src/com/oracle/jvmci/asm/sparc/SPARCAddress.java @ 21708:6df25b1418be
moved com.oracle.asm.** to jvmci-util.jar (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 03 Jun 2015 18:06:44 +0200 |
parents | graal/com.oracle.graal.asm.sparc/src/com/oracle/graal/asm/sparc/SPARCAddress.java@5024c80224c7 |
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21707:e0f311284930 | 21708:6df25b1418be |
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1 /* | |
2 * Copyright (c) 2013, 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 com.oracle.jvmci.asm.sparc; | |
24 | |
25 import static com.oracle.jvmci.sparc.SPARC.*; | |
26 | |
27 import com.oracle.jvmci.code.*; | |
28 import com.oracle.jvmci.sparc.*; | |
29 | |
30 public class SPARCAddress extends AbstractAddress { | |
31 | |
32 private final Register base; | |
33 private final Register index; | |
34 private final int displacement; | |
35 | |
36 /** | |
37 * Creates an {@link SPARCAddress} with given base register, no scaling and a given | |
38 * displacement. | |
39 * | |
40 * @param base the base register | |
41 * @param displacement the displacement | |
42 */ | |
43 public SPARCAddress(Register base, int displacement) { | |
44 this.base = base; | |
45 this.index = Register.None; | |
46 this.displacement = displacement; | |
47 } | |
48 | |
49 /** | |
50 * Creates an {@link SPARCAddress} with given base register, no scaling and a given index. | |
51 * | |
52 * @param base the base register | |
53 * @param index the index register | |
54 */ | |
55 public SPARCAddress(Register base, Register index) { | |
56 this.base = base; | |
57 this.index = index; | |
58 this.displacement = 0; | |
59 } | |
60 | |
61 @Override | |
62 public String toString() { | |
63 StringBuilder s = new StringBuilder(); | |
64 s.append("["); | |
65 String sep = ""; | |
66 if (!getBase().equals(Register.None)) { | |
67 s.append(getBase()); | |
68 sep = " + "; | |
69 } | |
70 if (!getIndex().equals(Register.None)) { | |
71 s.append(sep).append(getIndex()); | |
72 sep = " + "; | |
73 } else { | |
74 if (getDisplacement() < 0) { | |
75 s.append(" - ").append(-getDisplacement()); | |
76 } else if (getDisplacement() > 0) { | |
77 s.append(sep).append(getDisplacement()); | |
78 } | |
79 } | |
80 s.append("]"); | |
81 return s.toString(); | |
82 } | |
83 | |
84 /** | |
85 * @return Base register that defines the start of the address computation. If not present, is | |
86 * denoted by {@link Register#None}. | |
87 */ | |
88 public Register getBase() { | |
89 return base; | |
90 } | |
91 | |
92 /** | |
93 * @return Index register, the value of which is added to {@link #getBase}. If not present, is | |
94 * denoted by {@link Register#None}. | |
95 */ | |
96 public Register getIndex() { | |
97 return index; | |
98 } | |
99 | |
100 /** | |
101 * @return true if this address has an index register | |
102 */ | |
103 public boolean hasIndex() { | |
104 return !getIndex().equals(Register.None); | |
105 } | |
106 | |
107 /** | |
108 * This method adds the stack-bias to the displacement if the base register is either | |
109 * {@link SPARC#sp} or {@link SPARC#fp}. | |
110 * | |
111 * @return Optional additive displacement. | |
112 */ | |
113 public int getDisplacement() { | |
114 if (hasIndex()) { | |
115 throw new InternalError("address has index register"); | |
116 } | |
117 // TODO Should we also hide the register save area size here? | |
118 if (getBase().equals(sp) || getBase().equals(fp)) { | |
119 return displacement + STACK_BIAS; | |
120 } | |
121 return displacement; | |
122 } | |
123 } |