| /* |
| * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_CI_CICONSTANT_HPP |
| #define SHARE_VM_CI_CICONSTANT_HPP |
| |
| #include "ci/ciClassList.hpp" |
| #include "ci/ciNullObject.hpp" |
| |
| // ciConstant |
| // |
| // This class represents a constant value. |
| class ciConstant VALUE_OBJ_CLASS_SPEC { |
| friend class VMStructs; |
| private: |
| friend class ciEnv; |
| friend class ciField; |
| |
| BasicType _type; |
| union { |
| jint _int; |
| jlong _long; |
| jfloat _float; |
| jdouble _double; |
| ciObject* _object; |
| } _value; |
| |
| public: |
| |
| ciConstant() { |
| _type = T_ILLEGAL; _value._long = -1; |
| } |
| ciConstant(BasicType type, jint value) { |
| assert(type != T_LONG && type != T_DOUBLE && type != T_FLOAT, |
| "using the wrong ciConstant constructor"); |
| _type = type; _value._int = value; |
| } |
| ciConstant(jlong value) { |
| _type = T_LONG; _value._long = value; |
| } |
| ciConstant(jfloat value) { |
| _type = T_FLOAT; _value._float = value; |
| } |
| ciConstant(jdouble value) { |
| _type = T_DOUBLE; _value._double = value; |
| } |
| ciConstant(BasicType type, ciObject* p) { |
| _type = type; _value._object = p; |
| } |
| |
| BasicType basic_type() const { return _type; } |
| |
| jboolean as_boolean() { |
| assert(basic_type() == T_BOOLEAN, "wrong type"); |
| return (jboolean)_value._int; |
| } |
| jchar as_char() { |
| assert(basic_type() == T_CHAR, "wrong type"); |
| return (jchar)_value._int; |
| } |
| jbyte as_byte() { |
| assert(basic_type() == T_BYTE, "wrong type"); |
| return (jbyte)_value._int; |
| } |
| jshort as_short() { |
| assert(basic_type() == T_SHORT, "wrong type"); |
| return (jshort)_value._int; |
| } |
| jint as_int() { |
| assert(basic_type() == T_BOOLEAN || basic_type() == T_CHAR || |
| basic_type() == T_BYTE || basic_type() == T_SHORT || |
| basic_type() == T_INT, "wrong type"); |
| return _value._int; |
| } |
| jlong as_long() { |
| assert(basic_type() == T_LONG, "wrong type"); |
| return _value._long; |
| } |
| jfloat as_float() { |
| assert(basic_type() == T_FLOAT, "wrong type"); |
| return _value._float; |
| } |
| jdouble as_double() { |
| assert(basic_type() == T_DOUBLE, "wrong type"); |
| return _value._double; |
| } |
| ciObject* as_object() const { |
| assert(basic_type() == T_OBJECT || basic_type() == T_ARRAY, "wrong type"); |
| return _value._object; |
| } |
| |
| bool is_null_or_zero() const { |
| if (!is_java_primitive(basic_type())) { |
| return as_object()->is_null_object(); |
| } else if (type2size[basic_type()] == 1) { |
| // treat float bits as int, to avoid comparison with -0 and NaN |
| return (_value._int == 0); |
| } else if (type2size[basic_type()] == 2) { |
| // treat double bits as long, to avoid comparison with -0 and NaN |
| return (_value._long == 0); |
| } else { |
| return false; |
| } |
| } |
| |
| // Debugging output |
| void print(); |
| }; |
| |
| #endif // SHARE_VM_CI_CICONSTANT_HPP |