1 /*
2 * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2007 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 // Inline functions for memory copy and fill.
27
28 static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
29 memmove(to, from, count * HeapWordSize);
30 }
31
32 static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
33 switch (count) {
34 case 8: to[7] = from[7];
35 case 7: to[6] = from[6];
36 case 6: to[5] = from[5];
37 case 5: to[4] = from[4];
38 case 4: to[3] = from[3];
39 case 3: to[2] = from[2];
40 case 2: to[1] = from[1];
41 case 1: to[0] = from[0];
42 case 0: break;
43 default:
44 memcpy(to, from, count * HeapWordSize);
45 break;
46 }
47 }
48
49 static void pd_disjoint_words_atomic(HeapWord* from,
50 HeapWord* to,
51 size_t count) {
52 switch (count) {
53 case 8: to[7] = from[7];
54 case 7: to[6] = from[6];
55 case 6: to[5] = from[5];
56 case 5: to[4] = from[4];
57 case 4: to[3] = from[3];
58 case 3: to[2] = from[2];
59 case 2: to[1] = from[1];
60 case 1: to[0] = from[0];
61 case 0: break;
62 default:
63 while (count-- > 0) {
64 *to++ = *from++;
65 }
66 break;
67 }
68 }
69
70 static void pd_aligned_conjoint_words(HeapWord* from,
71 HeapWord* to,
72 size_t count) {
73 memmove(to, from, count * HeapWordSize);
74 }
75
76 static void pd_aligned_disjoint_words(HeapWord* from,
77 HeapWord* to,
78 size_t count) {
79 pd_disjoint_words(from, to, count);
80 }
81
82 static void pd_conjoint_bytes(void* from, void* to, size_t count) {
83 memmove(to, from, count);
84 }
85
86 static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) {
87 memmove(to, from, count);
88 }
89
90 static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {
91 _Copy_conjoint_jshorts_atomic(from, to, count);
92 }
93
94 static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {
95 _Copy_conjoint_jints_atomic(from, to, count);
96 }
97
98 static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {
99 _Copy_conjoint_jlongs_atomic(from, to, count);
100 }
101
102 static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) {
103 #ifdef _LP64
104 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
105 _Copy_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
106 #else
107 assert(BytesPerInt == BytesPerOop, "jints and oops must be the same size");
108 _Copy_conjoint_jints_atomic((jint*)from, (jint*)to, count);
109 #endif // _LP64
110 }
111
112 static void pd_arrayof_conjoint_bytes(HeapWord* from,
113 HeapWord* to,
114 size_t count) {
115 _Copy_arrayof_conjoint_bytes(from, to, count);
116 }
117
118 static void pd_arrayof_conjoint_jshorts(HeapWord* from,
119 HeapWord* to,
120 size_t count) {
121 _Copy_arrayof_conjoint_jshorts(from, to, count);
122 }
123
124 static void pd_arrayof_conjoint_jints(HeapWord* from,
125 HeapWord* to,
126 size_t count) {
127 _Copy_arrayof_conjoint_jints(from, to, count);
128 }
129
130 static void pd_arrayof_conjoint_jlongs(HeapWord* from,
131 HeapWord* to,
132 size_t count) {
133 _Copy_arrayof_conjoint_jlongs(from, to, count);
134 }
135
136 static void pd_arrayof_conjoint_oops(HeapWord* from,
137 HeapWord* to,
138 size_t count) {
139 #ifdef _LP64
140 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
141 _Copy_arrayof_conjoint_jlongs(from, to, count);
142 #else
143 assert(BytesPerInt == BytesPerOop, "jints and oops must be the same size");
144 _Copy_arrayof_conjoint_jints(from, to, count);
145 #endif // _LP64
146 }
147
148 static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {
149 #ifdef _LP64
150 julong* to = (julong*) tohw;
151 julong v = ((julong) value << 32) | value;
152 #else
153 juint* to = (juint*) tohw;
154 juint v = value;
155 #endif // _LP64
156
157 while (count-- > 0) {
158 *to++ = v;
159 }
160 }
161
162 static void pd_fill_to_aligned_words(HeapWord* tohw,
163 size_t count,
164 juint value) {
165 pd_fill_to_words(tohw, count, value);
166 }
167
168 static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {
169 memset(to, value, count);
170 }
171
172 static void pd_zero_to_words(HeapWord* tohw, size_t count) {
173 pd_fill_to_words(tohw, count, 0);
174 }
175
176 static void pd_zero_to_bytes(void* to, size_t count) {
177 memset(to, 0, count);
178 }