Sat, 07 Nov 2020 10:30:02 +0800
Added tag mips-jdk8u275-b01 for changeset d3b4d62f391f
1 /*
2 * Copyright (c) 1997, 2012, 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.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_OOPS_TYPEARRAYOOP_HPP
26 #define SHARE_VM_OOPS_TYPEARRAYOOP_HPP
28 #include "oops/arrayOop.hpp"
29 #include "oops/typeArrayKlass.hpp"
30 #include "runtime/orderAccess.inline.hpp"
32 // A typeArrayOop is an array containing basic types (non oop elements).
33 // It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs}
34 #include <limits.h>
36 class typeArrayOopDesc : public arrayOopDesc {
37 protected:
38 jchar* char_base() const { return (jchar*) base(T_CHAR); }
39 jboolean* bool_base() const { return (jboolean*)base(T_BOOLEAN); }
40 jbyte* byte_base() const { return (jbyte*) base(T_BYTE); }
41 jint* int_base() const { return (jint*) base(T_INT); }
42 jlong* long_base() const { return (jlong*) base(T_LONG); }
43 jshort* short_base() const { return (jshort*) base(T_SHORT); }
44 jfloat* float_base() const { return (jfloat*) base(T_FLOAT); }
45 jdouble* double_base() const { return (jdouble*) base(T_DOUBLE); }
47 friend class TypeArrayKlass;
49 public:
50 jbyte* byte_at_addr(int which) const {
51 assert(is_within_bounds(which), "index out of bounds");
52 return &byte_base()[which];
53 }
55 jboolean* bool_at_addr(int which) const {
56 assert(is_within_bounds(which), "index out of bounds");
57 return &bool_base()[which];
58 }
60 jchar* char_at_addr(int which) const {
61 assert(is_within_bounds(which), "index out of bounds");
62 return &char_base()[which];
63 }
65 jint* int_at_addr(int which) const {
66 assert(is_within_bounds(which), "index out of bounds");
67 return &int_base()[which];
68 }
70 jshort* short_at_addr(int which) const {
71 assert(is_within_bounds(which), "index out of bounds");
72 return &short_base()[which];
73 }
75 jushort* ushort_at_addr(int which) const { // for field descriptor arrays
76 assert(is_within_bounds(which), "index out of bounds");
77 return (jushort*) &short_base()[which];
78 }
80 jlong* long_at_addr(int which) const {
81 assert(is_within_bounds(which), "index out of bounds");
82 return &long_base()[which];
83 }
85 jfloat* float_at_addr(int which) const {
86 assert(is_within_bounds(which), "index out of bounds");
87 return &float_base()[which];
88 }
90 jdouble* double_at_addr(int which) const {
91 assert(is_within_bounds(which), "index out of bounds");
92 return &double_base()[which];
93 }
95 jbyte byte_at(int which) const { return *byte_at_addr(which); }
96 void byte_at_put(int which, jbyte contents) { *byte_at_addr(which) = contents; }
98 jboolean bool_at(int which) const { return *bool_at_addr(which); }
99 void bool_at_put(int which, jboolean contents) { *bool_at_addr(which) = (((jint)contents) & 1); }
101 jchar char_at(int which) const { return *char_at_addr(which); }
102 void char_at_put(int which, jchar contents) { *char_at_addr(which) = contents; }
104 jint int_at(int which) const { return *int_at_addr(which); }
105 void int_at_put(int which, jint contents) { *int_at_addr(which) = contents; }
107 jshort short_at(int which) const { return *short_at_addr(which); }
108 void short_at_put(int which, jshort contents) { *short_at_addr(which) = contents; }
110 jushort ushort_at(int which) const { return *ushort_at_addr(which); }
111 void ushort_at_put(int which, jushort contents) { *ushort_at_addr(which) = contents; }
113 jlong long_at(int which) const { return *long_at_addr(which); }
114 void long_at_put(int which, jlong contents) { *long_at_addr(which) = contents; }
116 jfloat float_at(int which) const { return *float_at_addr(which); }
117 void float_at_put(int which, jfloat contents) { *float_at_addr(which) = contents; }
119 jdouble double_at(int which) const { return *double_at_addr(which); }
120 void double_at_put(int which, jdouble contents) { *double_at_addr(which) = contents; }
122 jbyte byte_at_acquire(int which) const { return OrderAccess::load_acquire(byte_at_addr(which)); }
123 void release_byte_at_put(int which, jbyte contents) { OrderAccess::release_store(byte_at_addr(which), contents); }
125 // Java thinks metadata arrays are just arrays of either long or int, since
126 // there doesn't seem to be T_ADDRESS, so this is a bit of unfortunate
127 // casting
128 #ifdef _LP64
129 Metadata* metadata_at(int which) const {
130 return (Metadata*)*long_at_addr(which); }
131 void metadata_at_put(int which, Metadata* contents) {
132 *long_at_addr(which) = (jlong)contents;
133 }
134 #else
135 Metadata* metadata_at(int which) const {
136 return (Metadata*)*int_at_addr(which); }
137 void metadata_at_put(int which, Metadata* contents) {
138 *int_at_addr(which) = (int)contents;
139 }
140 #endif // _LP64
142 // Sizing
144 // Returns the number of words necessary to hold an array of "len"
145 // elements each of the given "byte_size".
146 private:
147 static int object_size(int lh, int length) {
148 int instance_header_size = Klass::layout_helper_header_size(lh);
149 int element_shift = Klass::layout_helper_log2_element_size(lh);
150 DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh));
151 assert(length <= arrayOopDesc::max_array_length(etype), "no overflow");
153 julong size_in_bytes = (juint)length;
154 size_in_bytes <<= element_shift;
155 size_in_bytes += instance_header_size;
156 julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize);
157 assert(size_in_words <= (julong)max_jint, "no overflow");
159 return align_object_size((intptr_t)size_in_words);
160 }
162 public:
163 int object_size() {
164 TypeArrayKlass* tk = TypeArrayKlass::cast(klass());
165 return object_size(tk->layout_helper(), length());
166 }
167 };
169 #endif // SHARE_VM_OOPS_TYPEARRAYOOP_HPP