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comparison agent/src/share/classes/sun/jvm/hotspot/asm/sparc/SPARCRegister.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2000-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.asm.sparc;
26
27 import sun.jvm.hotspot.asm.*;
28 import sun.jvm.hotspot.runtime.*;
29 import sun.jvm.hotspot.utilities.*;
30
31 public class SPARCRegister extends Register {
32 private static final int nofRegisters = 32; // total number of registers
33
34 private static final int GLOBAL_BASE = 0;
35 private static final int OUT_BASE = 8;
36 private static final int LOCAL_BASE = 16;
37 private static final int IN_BASE = 24;
38
39 private static final int LOCAL_SP_WORD_OFFSET = 0;
40 private static final int IN_SP_WORD_OFFSET = 8;
41
42 /** Constructor for an explicitly numbered register */
43 public SPARCRegister(int number) {
44 super(number);
45 }
46
47 /** Constructor for an I, G, O, or L register */
48 public SPARCRegister(SPARCRegisterType type, int number) {
49 if (type == SPARCRegisterType.GLOBAL) {
50 this.number = number + GLOBAL_BASE;
51 } else if (type == SPARCRegisterType.OUT) {
52 this.number = number + OUT_BASE;
53 } else if (type == SPARCRegisterType.LOCAL) {
54 this.number = number + LOCAL_BASE;
55 } else if (type == SPARCRegisterType.IN) {
56 this.number = number + IN_BASE;
57 } else {
58 throw new IllegalArgumentException("Invalid SPARC register type");
59 }
60 }
61
62 public int getNumberOfRegisters() {
63 return nofRegisters;
64 }
65
66 public boolean isIn() {
67 return (IN_BASE <= getNumber());
68 }
69
70 public boolean isLocal() {
71 return (LOCAL_BASE <= getNumber() && getNumber() < IN_BASE);
72 }
73
74 public boolean isOut() {
75 return (OUT_BASE <= getNumber() && getNumber() < LOCAL_BASE);
76 }
77
78 public boolean isGlobal() {
79 return (GLOBAL_BASE <= getNumber() && getNumber() < OUT_BASE);
80 }
81
82 public SPARCRegister afterSave() {
83 if (Assert.ASSERTS_ENABLED) {
84 Assert.that(isOut() || isGlobal(), "register not visible after save");
85 }
86 return isOut() ? new SPARCRegister(getNumber() + (IN_BASE - OUT_BASE)) : this;
87 }
88
89 public SPARCRegister afterRestore() {
90 if (Assert.ASSERTS_ENABLED) {
91 Assert.that(isIn() || isGlobal(), "register not visible after save");
92 }
93 return isIn() ? new SPARCRegister(getNumber() + (OUT_BASE - IN_BASE)) : this;
94 }
95
96 /** NOTE: this returns an offset in BYTES in this system! */
97 public long spOffsetInSavedWindow() {
98 if (isIn()) {
99 return VM.getVM().getAddressSize() * (getNumber() - IN_BASE + IN_SP_WORD_OFFSET);
100 } else if (isLocal()) {
101 return VM.getVM().getAddressSize() * (getNumber() - LOCAL_BASE + LOCAL_SP_WORD_OFFSET);
102 }
103 if (Assert.ASSERTS_ENABLED) {
104 Assert.that(isIn() || isLocal(), "only ins and locals are saved in my frame");
105 }
106 return 0;
107 }
108
109 public String toString() {
110 return SPARCRegisters.getRegisterName(number);
111 }
112
113 public boolean isFramePointer() {
114 return number == 30; // is I6?
115 }
116
117 public boolean isStackPointer() {
118 return number == 14; // is O6?
119 }
120
121 public boolean isFloat() {
122 return false;
123 }
124
125 public boolean isV9Only() {
126 return false;
127 }
128 }