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25 
26 package jdk.nashorn.internal.codegen.types;
27 
28 import static jdk.internal.org.objectweb.asm.Opcodes.L2D;
29 import static jdk.internal.org.objectweb.asm.Opcodes.L2I;
30 import static jdk.internal.org.objectweb.asm.Opcodes.LCONST_0;
31 import static jdk.internal.org.objectweb.asm.Opcodes.LCONST_1;
32 import static jdk.internal.org.objectweb.asm.Opcodes.LLOAD;
33 import static jdk.internal.org.objectweb.asm.Opcodes.LRETURN;
34 import static jdk.internal.org.objectweb.asm.Opcodes.LSTORE;
35 import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup;
36 import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_LONG;
37 
38 import jdk.internal.org.objectweb.asm.MethodVisitor;
39 import jdk.nashorn.internal.codegen.CompilerConstants;
40 import jdk.nashorn.internal.runtime.JSType;
41 
42 /**
43  * Type class: LONG
44  */
45 class LongType extends Type {
46     private static final long serialVersionUID = 1L;
47 
48     private static final CompilerConstants.Call VALUE_OF = staticCallNoLookup(Long.class, "valueOf", Long.class, long.class);
49 
LongType(final String name)50     protected LongType(final String name) {
51         super(name, long.class, 3, 2);
52     }
53 
LongType()54     protected LongType() {
55         this("long");
56     }
57 
58     @Override
nextWider()59     public Type nextWider() {
60         return NUMBER;
61     }
62 
63     @Override
getBoxedType()64     public Class<?> getBoxedType() {
65         return Long.class;
66     }
67 
68     @Override
getBytecodeStackType()69     public char getBytecodeStackType() {
70         return 'J';
71     }
72 
73     @Override
load(final MethodVisitor method, final int slot)74     public Type load(final MethodVisitor method, final int slot) {
75         assert slot != -1;
76         method.visitVarInsn(LLOAD, slot);
77         return LONG;
78     }
79 
80     @Override
store(final MethodVisitor method, final int slot)81     public void store(final MethodVisitor method, final int slot) {
82         assert slot != -1;
83         method.visitVarInsn(LSTORE, slot);
84     }
85 
86     @Override
ldc(final MethodVisitor method, final Object c)87     public Type ldc(final MethodVisitor method, final Object c) {
88         assert c instanceof Long;
89 
90         final long value = (Long) c;
91 
92         if (value == 0L) {
93             method.visitInsn(LCONST_0);
94         } else if (value == 1L) {
95             method.visitInsn(LCONST_1);
96         } else {
97             method.visitLdcInsn(c);
98         }
99 
100         return Type.LONG;
101     }
102 
103     @Override
convert(final MethodVisitor method, final Type to)104     public Type convert(final MethodVisitor method, final Type to) {
105         if (isEquivalentTo(to)) {
106             return to;
107         }
108 
109         if (to.isNumber()) {
110             method.visitInsn(L2D);
111         } else if (to.isInteger()) {
112             invokestatic(method, JSType.TO_INT32_L);
113         } else if (to.isBoolean()) {
114             method.visitInsn(L2I);
115         } else if (to.isObject()) {
116             invokestatic(method, VALUE_OF);
117         } else {
118             assert false : "Illegal conversion " + this + " -> " + to;
119         }
120 
121         return to;
122     }
123 
124     @Override
add(final MethodVisitor method, final int programPoint)125     public Type add(final MethodVisitor method, final int programPoint) {
126         throw new UnsupportedOperationException("add");
127     }
128 
129     @Override
_return(final MethodVisitor method)130     public void _return(final MethodVisitor method) {
131         method.visitInsn(LRETURN);
132     }
133 
134     @Override
loadUndefined(final MethodVisitor method)135     public Type loadUndefined(final MethodVisitor method) {
136         method.visitLdcInsn(UNDEFINED_LONG);
137         return LONG;
138     }
139 
140     @Override
loadForcedInitializer(final MethodVisitor method)141     public Type loadForcedInitializer(final MethodVisitor method) {
142         method.visitInsn(LCONST_0);
143         return LONG;
144     }
145 }
146