Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciConstant.hpp @ 17524:89152779163c
Merge with jdk8-b132
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 11:59:32 +0200 |
| parents | 4ca6dc0799b6 |
| children |
| rev | line source |
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| 0 | 1 /* |
| 17524 | 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CI_CICONSTANT_HPP |
| 26 #define SHARE_VM_CI_CICONSTANT_HPP | |
| 27 | |
| 28 #include "ci/ciClassList.hpp" | |
| 29 #include "ci/ciNullObject.hpp" | |
| 30 | |
| 0 | 31 // ciConstant |
| 32 // | |
| 33 // This class represents a constant value. | |
| 34 class ciConstant VALUE_OBJ_CLASS_SPEC { | |
| 3939 | 35 friend class VMStructs; |
| 0 | 36 private: |
| 37 friend class ciEnv; | |
| 38 friend class ciField; | |
| 39 | |
| 40 BasicType _type; | |
| 41 union { | |
| 42 jint _int; | |
| 43 jlong _long; | |
| 44 jfloat _float; | |
| 45 jdouble _double; | |
| 46 ciObject* _object; | |
| 47 } _value; | |
| 48 | |
| 49 public: | |
| 50 | |
| 51 ciConstant() { | |
| 52 _type = T_ILLEGAL; _value._long = -1; | |
| 53 } | |
| 54 ciConstant(BasicType type, jint value) { | |
| 55 assert(type != T_LONG && type != T_DOUBLE && type != T_FLOAT, | |
| 56 "using the wrong ciConstant constructor"); | |
| 57 _type = type; _value._int = value; | |
| 58 } | |
| 59 ciConstant(jlong value) { | |
| 60 _type = T_LONG; _value._long = value; | |
| 61 } | |
| 62 ciConstant(jfloat value) { | |
| 63 _type = T_FLOAT; _value._float = value; | |
| 64 } | |
| 65 ciConstant(jdouble value) { | |
| 66 _type = T_DOUBLE; _value._double = value; | |
| 67 } | |
| 68 ciConstant(BasicType type, ciObject* p) { | |
| 69 _type = type; _value._object = p; | |
| 70 } | |
| 71 | |
| 72 BasicType basic_type() const { return _type; } | |
| 73 | |
| 74 jboolean as_boolean() { | |
| 75 assert(basic_type() == T_BOOLEAN, "wrong type"); | |
| 76 return (jboolean)_value._int; | |
| 77 } | |
| 78 jchar as_char() { | |
| 79 assert(basic_type() == T_CHAR, "wrong type"); | |
| 80 return (jchar)_value._int; | |
| 81 } | |
| 82 jbyte as_byte() { | |
| 83 assert(basic_type() == T_BYTE, "wrong type"); | |
| 84 return (jbyte)_value._int; | |
| 85 } | |
| 86 jshort as_short() { | |
| 87 assert(basic_type() == T_SHORT, "wrong type"); | |
| 88 return (jshort)_value._int; | |
| 89 } | |
| 90 jint as_int() { | |
| 91 assert(basic_type() == T_BOOLEAN || basic_type() == T_CHAR || | |
| 92 basic_type() == T_BYTE || basic_type() == T_SHORT || | |
| 93 basic_type() == T_INT, "wrong type"); | |
| 94 return _value._int; | |
| 95 } | |
| 96 jlong as_long() { | |
| 97 assert(basic_type() == T_LONG, "wrong type"); | |
| 98 return _value._long; | |
| 99 } | |
| 100 jfloat as_float() { | |
| 101 assert(basic_type() == T_FLOAT, "wrong type"); | |
| 102 return _value._float; | |
| 103 } | |
| 104 jdouble as_double() { | |
| 105 assert(basic_type() == T_DOUBLE, "wrong type"); | |
| 106 return _value._double; | |
| 107 } | |
| 108 ciObject* as_object() const { | |
| 109 assert(basic_type() == T_OBJECT || basic_type() == T_ARRAY, "wrong type"); | |
| 110 return _value._object; | |
| 111 } | |
| 112 | |
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113 bool is_null_or_zero() const { |
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114 if (!is_java_primitive(basic_type())) { |
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115 return as_object()->is_null_object(); |
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116 } else if (type2size[basic_type()] == 1) { |
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117 // treat float bits as int, to avoid comparison with -0 and NaN |
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118 return (_value._int == 0); |
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119 } else if (type2size[basic_type()] == 2) { |
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120 // treat double bits as long, to avoid comparison with -0 and NaN |
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121 return (_value._long == 0); |
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122 } else { |
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123 return false; |
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124 } |
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125 } |
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126 |
| 0 | 127 // Debugging output |
| 128 void print(); | |
| 129 }; | |
| 1972 | 130 |
| 131 #endif // SHARE_VM_CI_CICONSTANT_HPP |