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comparison src/share/vm/ci/ciConstant.hpp @ 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 1999-2003 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 // ciConstant
26 //
27 // This class represents a constant value.
28 class ciConstant VALUE_OBJ_CLASS_SPEC {
29 private:
30 friend class ciEnv;
31 friend class ciField;
32
33 BasicType _type;
34 union {
35 jint _int;
36 jlong _long;
37 jint _long_half[2];
38 jfloat _float;
39 jdouble _double;
40 ciObject* _object;
41 } _value;
42
43 // Implementation of the print method.
44 void print_impl(outputStream* st);
45
46 public:
47
48 ciConstant() {
49 _type = T_ILLEGAL; _value._long = -1;
50 }
51 ciConstant(BasicType type, jint value) {
52 assert(type != T_LONG && type != T_DOUBLE && type != T_FLOAT,
53 "using the wrong ciConstant constructor");
54 _type = type; _value._int = value;
55 }
56 ciConstant(jlong value) {
57 _type = T_LONG; _value._long = value;
58 }
59 ciConstant(jfloat value) {
60 _type = T_FLOAT; _value._float = value;
61 }
62 ciConstant(jdouble value) {
63 _type = T_DOUBLE; _value._double = value;
64 }
65 ciConstant(BasicType type, ciObject* p) {
66 _type = type; _value._object = p;
67 }
68
69 BasicType basic_type() const { return _type; }
70
71 jboolean as_boolean() {
72 assert(basic_type() == T_BOOLEAN, "wrong type");
73 return (jboolean)_value._int;
74 }
75 jchar as_char() {
76 assert(basic_type() == T_CHAR, "wrong type");
77 return (jchar)_value._int;
78 }
79 jbyte as_byte() {
80 assert(basic_type() == T_BYTE, "wrong type");
81 return (jbyte)_value._int;
82 }
83 jshort as_short() {
84 assert(basic_type() == T_SHORT, "wrong type");
85 return (jshort)_value._int;
86 }
87 jint as_int() {
88 assert(basic_type() == T_BOOLEAN || basic_type() == T_CHAR ||
89 basic_type() == T_BYTE || basic_type() == T_SHORT ||
90 basic_type() == T_INT, "wrong type");
91 return _value._int;
92 }
93 jlong as_long() {
94 assert(basic_type() == T_LONG, "wrong type");
95 return _value._long;
96 }
97 jfloat as_float() {
98 assert(basic_type() == T_FLOAT, "wrong type");
99 return _value._float;
100 }
101 jdouble as_double() {
102 assert(basic_type() == T_DOUBLE, "wrong type");
103 return _value._double;
104 }
105 ciObject* as_object() const {
106 assert(basic_type() == T_OBJECT || basic_type() == T_ARRAY, "wrong type");
107 return _value._object;
108 }
109
110 // Debugging output
111 void print();
112 };