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Java > Open Source Codes > org > aspectj > compiler > base > ast > IntType


1 /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2  *
3  * This file is part of the compiler and core tools for the AspectJ(tm)
4  * programming language; see http://aspectj.org
5  *
6  * The contents of this file are subject to the Mozilla Public License
7  * Version 1.1 (the "License"); you may not use this file except in
8  * compliance with the License. You may obtain a copy of the License at
9  * either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is AspectJ.
17  *
18  * The Initial Developer of the Original Code is Xerox Corporation. Portions
19  * created by Xerox Corporation are Copyright (C) 1999-2002 Xerox Corporation.
20  * All Rights Reserved.
21  *
22  * Contributor(s):
23  */
24
25 package org.aspectj.compiler.base.ast;
26
27 import org.aspectj.compiler.base.*;
28 import java.io.IOException JavaDoc;
29
30
31 import org.aspectj.compiler.base.bcg.CodeBuilder;
32 import org.aspectj.compiler.base.bcg.Label;
33
34
35 public final class IntType extends IntishType {
36
37     protected boolean isAssignableFromOtherType(Type other) {
38         return (other instanceof IntishType);
39     }
40
41     public String JavaDoc getName() { return "int"; }
42     public int getTypeIndex() { return Type.INT; }
43     public Type getRefType() { return getTypeManager().getType("java.lang", "Integer"); }
44
45     public IntType(JavaCompiler compiler) {
46         super(compiler);
47     }
48
49     // vm internals
50 public String JavaDoc getDescriptor() { return "I"; }
51
52     // folding
53 LiteralExpr foldCast(LiteralExpr rand) {
54         return getAST().makeLiteral(rand.getIntValue());
55     }
56
57     // code gen
58 void emitCastFromInt(CodeBuilder cb) { }
59     void emitCastFromFloat(CodeBuilder cb) { cb.emitF2I(); }
60     void emitCastFromLong(CodeBuilder cb) { cb.emitL2I(); }
61     void emitCastFromDouble(CodeBuilder cb) { cb.emitD2I(); }
62
63     void emitAload(CodeBuilder cb) { cb.emitIALOAD(); }
64     void emitAstore(CodeBuilder cb) { cb.emitIASTORE(); }
65
66     // ------------------------------
67 // "fast" opcode handling
68
69     boolean hasFastIncOp(Expr lhs, int rhs) {
70         return (lhs instanceof VarExpr)
71             && (Short.MIN_VALUE <= rhs)
72             && (rhs <= Short.MAX_VALUE);
73     }
74     void emitFastIncOp(CodeBuilder cb, Expr lhs, int rhs) {
75         cb.emitIINC(((VarExpr) lhs).getVarDec().getFrameLoc(), rhs);
76     }
77 }
78
79
80
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