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Java > Open Source Codes > com > sun > org > apache > bcel > internal > generic > InstructionConstants


1 package com.sun.org.apache.bcel.internal.generic;
2
3 /* ====================================================================
4  * The Apache Software License, Version 1.1
5  *
6  * Copyright (c) 2001 The Apache Software Foundation. All rights
7  * reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution,
22  * if any, must include the following acknowledgment:
23  * "This product includes software developed by the
24  * Apache Software Foundation (http://www.apache.org/)."
25  * Alternately, this acknowledgment may appear in the software itself,
26  * if and wherever such third-party acknowledgments normally appear.
27  *
28  * 4. The names "Apache" and "Apache Software Foundation" and
29  * "Apache BCEL" must not be used to endorse or promote products
30  * derived from this software without prior written permission. For
31  * written permission, please contact apache@apache.org.
32  *
33  * 5. Products derived from this software may not be called "Apache",
34  * "Apache BCEL", nor may "Apache" appear in their name, without
35  * prior written permission of the Apache Software Foundation.
36  *
37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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48  * SUCH DAMAGE.
49  * ====================================================================
50  *
51  * This software consists of voluntary contributions made by many
52  * individuals on behalf of the Apache Software Foundation. For more
53  * information on the Apache Software Foundation, please see
54  * <http://www.apache.org/>.
55  */
56
57 import com.sun.org.apache.bcel.internal.Constants;
58
59 /**
60  * This interface contains shareable instruction objects.
61  *
62  * In order to save memory you can use some instructions multiply,
63  * since they have an immutable state and are directly derived from
64  * Instruction. I.e. they have no instance fields that could be
65  * changed. Since some of these instructions like ICONST_0 occur
66  * very frequently this can save a lot of time and space. This
67  * feature is an adaptation of the FlyWeight design pattern, we
68  * just use an array instead of a factory.
69  *
70  * The Instructions can also accessed directly under their names, so
71  * it's possible to write il.append(Instruction.ICONST_0);
72  *
73  * @version $Id: InstructionConstants.java,v 1.1.1.1 2001/10/29 20:00:18 jvanzyl Exp $
74  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
75  */
76 public interface InstructionConstants {
77   /** Predefined instruction objects
78    */
79   public static final Instruction NOP = new NOP();
80   public static final Instruction ACONST_NULL = new ACONST_NULL();
81   public static final Instruction ICONST_M1 = new ICONST(-1);
82   public static final Instruction ICONST_0 = new ICONST(0);
83   public static final Instruction ICONST_1 = new ICONST(1);
84   public static final Instruction ICONST_2 = new ICONST(2);
85   public static final Instruction ICONST_3 = new ICONST(3);
86   public static final Instruction ICONST_4 = new ICONST(4);
87   public static final Instruction ICONST_5 = new ICONST(5);
88   public static final Instruction LCONST_0 = new LCONST(0);
89   public static final Instruction LCONST_1 = new LCONST(1);
90   public static final Instruction FCONST_0 = new FCONST(0);
91   public static final Instruction FCONST_1 = new FCONST(1);
92   public static final Instruction FCONST_2 = new FCONST(2);
93   public static final Instruction DCONST_0 = new DCONST(0);
94   public static final Instruction DCONST_1 = new DCONST(1);
95   public static final ArrayInstruction IALOAD = new IALOAD();
96   public static final ArrayInstruction LALOAD = new LALOAD();
97   public static final ArrayInstruction FALOAD = new FALOAD();
98   public static final ArrayInstruction DALOAD = new DALOAD();
99   public static final ArrayInstruction AALOAD = new AALOAD();
100   public static final ArrayInstruction BALOAD = new BALOAD();
101   public static final ArrayInstruction CALOAD = new CALOAD();
102   public static final ArrayInstruction SALOAD = new SALOAD();
103   public static final ArrayInstruction IASTORE = new IASTORE();
104   public static final ArrayInstruction LASTORE = new LASTORE();
105   public static final ArrayInstruction FASTORE = new FASTORE();
106   public static final ArrayInstruction DASTORE = new DASTORE();
107   public static final ArrayInstruction AASTORE = new AASTORE();
108   public static final ArrayInstruction BASTORE = new BASTORE();
109   public static final ArrayInstruction CASTORE = new CASTORE();
110   public static final ArrayInstruction SASTORE = new SASTORE();
111   public static final StackInstruction POP = new POP();
112   public static final StackInstruction POP2 = new POP2();
113   public static final StackInstruction DUP = new DUP();
114   public static final StackInstruction DUP_X1 = new DUP_X1();
115   public static final StackInstruction DUP_X2 = new DUP_X2();
116   public static final StackInstruction DUP2 = new DUP2();
117   public static final StackInstruction DUP2_X1 = new DUP2_X1();
118   public static final StackInstruction DUP2_X2 = new DUP2_X2();
119   public static final StackInstruction SWAP = new SWAP();
120   public static final ArithmeticInstruction IADD = new IADD();
121   public static final ArithmeticInstruction LADD = new LADD();
122   public static final ArithmeticInstruction FADD = new FADD();
123   public static final ArithmeticInstruction DADD = new DADD();
124   public static final ArithmeticInstruction ISUB = new ISUB();
125   public static final ArithmeticInstruction LSUB = new LSUB();
126   public static final ArithmeticInstruction FSUB = new FSUB();
127   public static final ArithmeticInstruction DSUB = new DSUB();
128   public static final ArithmeticInstruction IMUL = new IMUL();
129   public static final ArithmeticInstruction LMUL = new LMUL();
130   public static final ArithmeticInstruction FMUL = new FMUL();
131   public static final ArithmeticInstruction DMUL = new DMUL();
132   public static final ArithmeticInstruction IDIV = new IDIV();
133   public static final ArithmeticInstruction LDIV = new LDIV();
134   public static final ArithmeticInstruction FDIV = new FDIV();
135   public static final ArithmeticInstruction DDIV = new DDIV();
136   public static final ArithmeticInstruction IREM = new IREM();
137   public static final ArithmeticInstruction LREM = new LREM();
138   public static final ArithmeticInstruction FREM = new FREM();
139   public static final ArithmeticInstruction DREM = new DREM();
140   public static final ArithmeticInstruction INEG = new INEG();
141   public static final ArithmeticInstruction LNEG = new LNEG();
142   public static final ArithmeticInstruction FNEG = new FNEG();
143   public static final ArithmeticInstruction DNEG = new DNEG();
144   public static final ArithmeticInstruction ISHL = new ISHL();
145   public static final ArithmeticInstruction LSHL = new LSHL();
146   public static final ArithmeticInstruction ISHR = new ISHR();
147   public static final ArithmeticInstruction LSHR = new LSHR();
148   public static final ArithmeticInstruction IUSHR = new IUSHR();
149   public static final ArithmeticInstruction LUSHR = new LUSHR();
150   public static final ArithmeticInstruction IAND = new IAND();
151   public static final ArithmeticInstruction LAND = new LAND();
152   public static final ArithmeticInstruction IOR = new IOR();
153   public static final ArithmeticInstruction LOR = new LOR();
154   public static final ArithmeticInstruction IXOR = new IXOR();
155   public static final ArithmeticInstruction LXOR = new LXOR();
156   public static final ConversionInstruction I2L = new I2L();
157   public static final ConversionInstruction I2F = new I2F();
158   public static final ConversionInstruction I2D = new I2D();
159   public static final ConversionInstruction L2I = new L2I();
160   public static final ConversionInstruction L2F = new L2F();
161   public static final ConversionInstruction L2D = new L2D();
162   public static final ConversionInstruction F2I = new F2I();
163   public static final ConversionInstruction F2L = new F2L();
164   public static final ConversionInstruction F2D = new F2D();
165   public static final ConversionInstruction D2I = new D2I();
166   public static final ConversionInstruction D2L = new D2L();
167   public static final ConversionInstruction D2F = new D2F();
168   public static final ConversionInstruction I2B = new I2B();
169   public static final ConversionInstruction I2C = new I2C();
170   public static final ConversionInstruction I2S = new I2S();
171   public static final Instruction LCMP = new LCMP();
172   public static final Instruction FCMPL = new FCMPL();
173   public static final Instruction FCMPG = new FCMPG();
174   public static final Instruction DCMPL = new DCMPL();
175   public static final Instruction DCMPG = new DCMPG();
176   public static final ReturnInstruction IRETURN = new IRETURN();
177   public static final ReturnInstruction LRETURN = new LRETURN();
178   public static final ReturnInstruction FRETURN = new FRETURN();
179   public static final ReturnInstruction DRETURN = new DRETURN();
180   public static final ReturnInstruction ARETURN = new ARETURN();
181   public static final ReturnInstruction RETURN = new RETURN();
182   public static final Instruction ARRAYLENGTH = new ARRAYLENGTH();
183   public static final Instruction ATHROW = new ATHROW();
184   public static final Instruction MONITORENTER = new MONITORENTER();
185   public static final Instruction MONITOREXIT = new MONITOREXIT();
186
187   /** You can use these constants in multiple places safely, if you can guarantee
188    * that you will never alter their internal values, e.g. call setIndex().
189    */
190   public static final LocalVariableInstruction THIS = new ALOAD(0);
191   public static final LocalVariableInstruction ALOAD_0 = THIS;
192   public static final LocalVariableInstruction ALOAD_1 = new ALOAD(1);
193   public static final LocalVariableInstruction ALOAD_2 = new ALOAD(2);
194   public static final LocalVariableInstruction ILOAD_0 = new ILOAD(0);
195   public static final LocalVariableInstruction ILOAD_1 = new ILOAD(1);
196   public static final LocalVariableInstruction ILOAD_2 = new ILOAD(2);
197   public static final LocalVariableInstruction ASTORE_0 = new ASTORE(0);
198   public static final LocalVariableInstruction ASTORE_1 = new ASTORE(1);
199   public static final LocalVariableInstruction ASTORE_2 = new ASTORE(2);
200   public static final LocalVariableInstruction ISTORE_0 = new ISTORE(0);
201   public static final LocalVariableInstruction ISTORE_1 = new ISTORE(1);
202   public static final LocalVariableInstruction ISTORE_2 = new ISTORE(2);
203
204
205   /** Get object via its opcode, for immutable instructions like
206    * branch instructions entries are set to null.
207    */
208   public static final Instruction[] INSTRUCTIONS = new Instruction[256];
209   
210   /** Interfaces may have no static initializers, so we simulate this
211    * with an inner class.
212    */
213   static final Clinit bla = new Clinit();
214
215   static class Clinit {
216     Clinit() {
217       INSTRUCTIONS[Constants.NOP] = NOP;
218       INSTRUCTIONS[Constants.ACONST_NULL] = ACONST_NULL;
219       INSTRUCTIONS[Constants.ICONST_M1] = ICONST_M1;
220       INSTRUCTIONS[Constants.ICONST_0] = ICONST_0;
221       INSTRUCTIONS[Constants.ICONST_1] = ICONST_1;
222       INSTRUCTIONS[Constants.ICONST_2] = ICONST_2;
223       INSTRUCTIONS[Constants.ICONST_3] = ICONST_3;
224       INSTRUCTIONS[Constants.ICONST_4] = ICONST_4;
225       INSTRUCTIONS[Constants.ICONST_5] = ICONST_5;
226       INSTRUCTIONS[Constants.LCONST_0] = LCONST_0;
227       INSTRUCTIONS[Constants.LCONST_1] = LCONST_1;
228       INSTRUCTIONS[Constants.FCONST_0] = FCONST_0;
229       INSTRUCTIONS[Constants.FCONST_1] = FCONST_1;
230       INSTRUCTIONS[Constants.FCONST_2] = FCONST_2;
231       INSTRUCTIONS[Constants.DCONST_0] = DCONST_0;
232       INSTRUCTIONS[Constants.DCONST_1] = DCONST_1;
233       INSTRUCTIONS[Constants.IALOAD] = IALOAD;
234       INSTRUCTIONS[Constants.LALOAD] = LALOAD;
235       INSTRUCTIONS[Constants.FALOAD] = FALOAD;
236       INSTRUCTIONS[Constants.DALOAD] = DALOAD;
237       INSTRUCTIONS[Constants.AALOAD] = AALOAD;
238       INSTRUCTIONS[Constants.BALOAD] = BALOAD;
239       INSTRUCTIONS[Constants.CALOAD] = CALOAD;
240       INSTRUCTIONS[Constants.SALOAD] = SALOAD;
241       INSTRUCTIONS[Constants.IASTORE] = IASTORE;
242       INSTRUCTIONS[Constants.LASTORE] = LASTORE;
243       INSTRUCTIONS[Constants.FASTORE] = FASTORE;
244       INSTRUCTIONS[Constants.DASTORE] = DASTORE;
245       INSTRUCTIONS[Constants.AASTORE] = AASTORE;
246       INSTRUCTIONS[Constants.BASTORE] = BASTORE;
247       INSTRUCTIONS[Constants.CASTORE] = CASTORE;
248       INSTRUCTIONS[Constants.SASTORE] = SASTORE;
249       INSTRUCTIONS[Constants.POP] = POP;
250       INSTRUCTIONS[Constants.POP2] = POP2;
251       INSTRUCTIONS[Constants.DUP] = DUP;
252       INSTRUCTIONS[Constants.DUP_X1] = DUP_X1;
253       INSTRUCTIONS[Constants.DUP_X2] = DUP_X2;
254       INSTRUCTIONS[Constants.DUP2] = DUP2;
255       INSTRUCTIONS[Constants.DUP2_X1] = DUP2_X1;
256       INSTRUCTIONS[Constants.DUP2_X2] = DUP2_X2;
257       INSTRUCTIONS[Constants.SWAP] = SWAP;
258       INSTRUCTIONS[Constants.IADD] = IADD;
259       INSTRUCTIONS[Constants.LADD] = LADD;
260       INSTRUCTIONS[Constants.FADD] = FADD;
261       INSTRUCTIONS[Constants.DADD] = DADD;
262       INSTRUCTIONS[Constants.ISUB] = ISUB;
263       INSTRUCTIONS[Constants.LSUB] = LSUB;
264       INSTRUCTIONS[Constants.FSUB] = FSUB;
265       INSTRUCTIONS[Constants.DSUB] = DSUB;
266       INSTRUCTIONS[Constants.IMUL] = IMUL;
267       INSTRUCTIONS[Constants.LMUL] = LMUL;
268       INSTRUCTIONS[Constants.FMUL] = FMUL;
269       INSTRUCTIONS[Constants.DMUL] = DMUL;
270       INSTRUCTIONS[Constants.IDIV] = IDIV;
271       INSTRUCTIONS[Constants.LDIV] = LDIV;
272       INSTRUCTIONS[Constants.FDIV] = FDIV;
273       INSTRUCTIONS[Constants.DDIV] = DDIV;
274       INSTRUCTIONS[Constants.IREM] = IREM;
275       INSTRUCTIONS[Constants.LREM] = LREM;
276       INSTRUCTIONS[Constants.FREM] = FREM;
277       INSTRUCTIONS[Constants.DREM] = DREM;
278       INSTRUCTIONS[Constants.INEG] = INEG;
279       INSTRUCTIONS[Constants.LNEG] = LNEG;
280       INSTRUCTIONS[Constants.FNEG] = FNEG;
281       INSTRUCTIONS[Constants.DNEG] = DNEG;
282       INSTRUCTIONS[Constants.ISHL] = ISHL;
283       INSTRUCTIONS[Constants.LSHL] = LSHL;
284       INSTRUCTIONS[Constants.ISHR] = ISHR;
285       INSTRUCTIONS[Constants.LSHR] = LSHR;
286       INSTRUCTIONS[Constants.IUSHR] = IUSHR;
287       INSTRUCTIONS[Constants.LUSHR] = LUSHR;
288       INSTRUCTIONS[Constants.IAND] = IAND;
289       INSTRUCTIONS[Constants.LAND] = LAND;
290       INSTRUCTIONS[Constants.IOR] = IOR;
291       INSTRUCTIONS[Constants.LOR] = LOR;
292       INSTRUCTIONS[Constants.IXOR] = IXOR;
293       INSTRUCTIONS[Constants.LXOR] = LXOR;
294       INSTRUCTIONS[Constants.I2L] = I2L;
295       INSTRUCTIONS[Constants.I2F] = I2F;
296       INSTRUCTIONS[Constants.I2D] = I2D;
297       INSTRUCTIONS[Constants.L2I] = L2I;
298       INSTRUCTIONS[Constants.L2F] = L2F;
299       INSTRUCTIONS[Constants.L2D] = L2D;
300       INSTRUCTIONS[Constants.F2I] = F2I;
301       INSTRUCTIONS[Constants.F2L] = F2L;
302       INSTRUCTIONS[Constants.F2D] = F2D;
303       INSTRUCTIONS[Constants.D2I] = D2I;
304       INSTRUCTIONS[Constants.D2L] = D2L;
305       INSTRUCTIONS[Constants.D2F] = D2F;
306       INSTRUCTIONS[Constants.I2B] = I2B;
307       INSTRUCTIONS[Constants.I2C] = I2C;
308       INSTRUCTIONS[Constants.I2S] = I2S;
309       INSTRUCTIONS[Constants.LCMP] = LCMP;
310       INSTRUCTIONS[Constants.FCMPL] = FCMPL;
311       INSTRUCTIONS[Constants.FCMPG] = FCMPG;
312       INSTRUCTIONS[Constants.DCMPL] = DCMPL;
313       INSTRUCTIONS[Constants.DCMPG] = DCMPG;
314       INSTRUCTIONS[Constants.IRETURN] = IRETURN;
315       INSTRUCTIONS[Constants.LRETURN] = LRETURN;
316       INSTRUCTIONS[Constants.FRETURN] = FRETURN;
317       INSTRUCTIONS[Constants.DRETURN] = DRETURN;
318       INSTRUCTIONS[Constants.ARETURN] = ARETURN;
319       INSTRUCTIONS[Constants.RETURN] = RETURN;
320       INSTRUCTIONS[Constants.ARRAYLENGTH] = ARRAYLENGTH;
321       INSTRUCTIONS[Constants.ATHROW] = ATHROW;
322       INSTRUCTIONS[Constants.MONITORENTER] = MONITORENTER;
323       INSTRUCTIONS[Constants.MONITOREXIT] = MONITOREXIT;
324     }
325   }
326 }
327
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