LongType.java revision 1085:774b95940e10 
1/*
2 * Copyright (c) 2010, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.codegen.types;
27
28import static jdk.internal.org.objectweb.asm.Opcodes.L2D;
29import static jdk.internal.org.objectweb.asm.Opcodes.L2I;
30import static jdk.internal.org.objectweb.asm.Opcodes.LADD;
31import static jdk.internal.org.objectweb.asm.Opcodes.LAND;
32import static jdk.internal.org.objectweb.asm.Opcodes.LCMP;
33import static jdk.internal.org.objectweb.asm.Opcodes.LCONST_0;
34import static jdk.internal.org.objectweb.asm.Opcodes.LCONST_1;
35import static jdk.internal.org.objectweb.asm.Opcodes.LLOAD;
36import static jdk.internal.org.objectweb.asm.Opcodes.LMUL;
37import static jdk.internal.org.objectweb.asm.Opcodes.LOR;
38import static jdk.internal.org.objectweb.asm.Opcodes.LRETURN;
39import static jdk.internal.org.objectweb.asm.Opcodes.LSHL;
40import static jdk.internal.org.objectweb.asm.Opcodes.LSHR;
41import static jdk.internal.org.objectweb.asm.Opcodes.LSTORE;
42import static jdk.internal.org.objectweb.asm.Opcodes.LSUB;
43import static jdk.internal.org.objectweb.asm.Opcodes.LUSHR;
44import static jdk.internal.org.objectweb.asm.Opcodes.LXOR;
45import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup;
46import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_LONG;
47import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT;
48
49import jdk.internal.org.objectweb.asm.MethodVisitor;
50import jdk.nashorn.internal.codegen.CompilerConstants;
51import jdk.nashorn.internal.runtime.JSType;
52
53/**
54 * Type class: LONG
55 */
56class LongType extends BitwiseType {
57    private static final long serialVersionUID = 1L;
58
59    private static final CompilerConstants.Call VALUE_OF = staticCallNoLookup(Long.class, "valueOf", Long.class, long.class);
60
61    protected LongType(final String name) {
62        super(name, long.class, 3, 2);
63    }
64
65    protected LongType() {
66        this("long");
67    }
68
69    @Override
70    public Type nextWider() {
71        return NUMBER;
72    }
73
74    @Override
75    public Class<?> getBoxedType() {
76        return Long.class;
77    }
78
79    @Override
80    public char getBytecodeStackType() {
81        return 'J';
82    }
83
84    @Override
85    public Type cmp(final MethodVisitor method) {
86        method.visitInsn(LCMP);
87        return INT;
88    }
89
90    @Override
91    public Type load(final MethodVisitor method, final int slot) {
92        assert slot != -1;
93        method.visitVarInsn(LLOAD, slot);
94        return LONG;
95    }
96
97    @Override
98    public void store(final MethodVisitor method, final int slot) {
99        assert slot != -1;
100        method.visitVarInsn(LSTORE, slot);
101    }
102
103    @Override
104    public Type ldc(final MethodVisitor method, final Object c) {
105        assert c instanceof Long;
106
107        final long value = (Long) c;
108
109        if (value == 0L) {
110            method.visitInsn(LCONST_0);
111        } else if (value == 1L) {
112            method.visitInsn(LCONST_1);
113        } else {
114            method.visitLdcInsn(c);
115        }
116
117        return Type.LONG;
118    }
119
120    @Override
121    public Type convert(final MethodVisitor method, final Type to) {
122        if (isEquivalentTo(to)) {
123            return to;
124        }
125
126        if (to.isNumber()) {
127            method.visitInsn(L2D);
128        } else if (to.isInteger()) {
129            invokestatic(method, JSType.TO_INT32_L);
130        } else if (to.isBoolean()) {
131            method.visitInsn(L2I);
132        } else if (to.isObject()) {
133            invokestatic(method, VALUE_OF);
134        } else {
135            assert false : "Illegal conversion " + this + " -> " + to;
136        }
137
138        return to;
139    }
140
141    @Override
142    public Type add(final MethodVisitor method, final int programPoint) {
143        if(programPoint == INVALID_PROGRAM_POINT) {
144            method.visitInsn(LADD);
145        } else {
146            method.visitInvokeDynamicInsn("ladd", "(JJ)J", MATHBOOTSTRAP, programPoint);
147        }
148        return LONG;
149    }
150
151    @Override
152    public Type sub(final MethodVisitor method, final int programPoint) {
153        if(programPoint == INVALID_PROGRAM_POINT) {
154            method.visitInsn(LSUB);
155        } else {
156            method.visitInvokeDynamicInsn("lsub", "(JJ)J", MATHBOOTSTRAP, programPoint);
157        }
158        return LONG;
159    }
160
161    @Override
162    public Type mul(final MethodVisitor method, final int programPoint) {
163        if(programPoint == INVALID_PROGRAM_POINT) {
164            method.visitInsn(LMUL);
165        } else {
166            method.visitInvokeDynamicInsn("lmul", "(JJ)J", MATHBOOTSTRAP, programPoint);
167        }
168        return LONG;
169    }
170
171    @Override
172    public Type div(final MethodVisitor method, final int programPoint) {
173        if (programPoint == INVALID_PROGRAM_POINT) {
174            JSType.DIV_ZERO_LONG.invoke(method);
175        } else {
176            method.visitInvokeDynamicInsn("ldiv", "(JJ)J", MATHBOOTSTRAP, programPoint);
177        }
178        return LONG;
179    }
180
181    @Override
182    public Type rem(final MethodVisitor method, final int programPoint) {
183        if (programPoint == INVALID_PROGRAM_POINT) {
184            JSType.REM_ZERO_LONG.invoke(method);
185        } else {
186            method.visitInvokeDynamicInsn("lrem", "(JJ)J", MATHBOOTSTRAP, programPoint);
187        }
188        return LONG;
189    }
190
191    @Override
192    public Type shr(final MethodVisitor method) {
193        method.visitInsn(LUSHR);
194        return LONG;
195    }
196
197    @Override
198    public Type sar(final MethodVisitor method) {
199        method.visitInsn(LSHR);
200        return LONG;
201    }
202
203    @Override
204    public Type shl(final MethodVisitor method) {
205        method.visitInsn(LSHL);
206        return LONG;
207    }
208
209    @Override
210    public Type and(final MethodVisitor method) {
211        method.visitInsn(LAND);
212        return LONG;
213    }
214
215    @Override
216    public Type or(final MethodVisitor method) {
217        method.visitInsn(LOR);
218        return LONG;
219    }
220
221    @Override
222    public Type xor(final MethodVisitor method) {
223        method.visitInsn(LXOR);
224        return LONG;
225    }
226
227    @Override
228    public Type neg(final MethodVisitor method, final int programPoint) {
229        method.visitInvokeDynamicInsn("lneg", "(J)J", MATHBOOTSTRAP, programPoint);
230        return LONG;
231    }
232
233    @Override
234    public void _return(final MethodVisitor method) {
235        method.visitInsn(LRETURN);
236    }
237
238    @Override
239    public Type loadUndefined(final MethodVisitor method) {
240        method.visitLdcInsn(UNDEFINED_LONG);
241        return LONG;
242    }
243
244    @Override
245    public Type loadForcedInitializer(final MethodVisitor method) {
246        method.visitInsn(LCONST_0);
247        return LONG;
248    }
249
250    @Override
251    public Type cmp(final MethodVisitor method, final boolean isCmpG) {
252        return cmp(method);
253    }
254}
255