copy_solaris_x86.inline.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2003, 2004, 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 */
24
25static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
26  (void)memmove(to, from, count * HeapWordSize);
27}
28
29static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
30#ifndef AMD64
31  (void)memcpy(to, from, count * HeapWordSize);
32#else
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    (void)memcpy(to, from, count * HeapWordSize);
45    break;
46  }
47#endif // AMD64
48}
49
50static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) {
51  switch (count) {
52  case 8:  to[7] = from[7];
53  case 7:  to[6] = from[6];
54  case 6:  to[5] = from[5];
55  case 5:  to[4] = from[4];
56  case 4:  to[3] = from[3];
57  case 3:  to[2] = from[2];
58  case 2:  to[1] = from[1];
59  case 1:  to[0] = from[0];
60  case 0:  break;
61  default: while (count-- > 0) {
62             *to++ = *from++;
63           }
64           break;
65  }
66}
67
68static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
69  (void)memmove(to, from, count * HeapWordSize);
70}
71
72static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
73  pd_disjoint_words(from, to, count);
74}
75
76static void pd_conjoint_bytes(void* from, void* to, size_t count) {
77#ifdef AMD64
78  (void)memmove(to, from, count);
79#else
80  _Copy_conjoint_bytes(from, to, count);
81#endif // AMD64
82}
83
84static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) {
85  pd_conjoint_bytes(from, to, count);
86}
87
88static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {
89  _Copy_conjoint_jshorts_atomic(from, to, count);
90}
91
92static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {
93  _Copy_conjoint_jints_atomic(from, to, count);
94}
95
96static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {
97  // Guarantee use of fild/fistp or xmm regs via some asm code, because compilers won't.
98  _Copy_conjoint_jlongs_atomic(from, to, count);
99}
100
101static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) {
102#ifdef AMD64
103  assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
104  _Copy_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
105#else
106  _Copy_conjoint_jints_atomic((jint*)from, (jint*)to, count);
107#endif // AMD64
108}
109
110static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) {
111  _Copy_arrayof_conjoint_bytes(from, to, count);
112}
113
114static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) {
115  _Copy_arrayof_conjoint_jshorts(from, to, count);
116}
117
118static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) {
119  _Copy_arrayof_conjoint_jints(from, to, count);
120}
121
122static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) {
123#ifdef AMD64
124  _Copy_arrayof_conjoint_jlongs(from, to, count);
125#else
126  pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
127#endif // AMD64
128}
129
130static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) {
131#ifdef AMD64
132  assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
133  _Copy_arrayof_conjoint_jlongs(from, to, count);
134#else
135  assert(BytesPerInt == BytesPerOop, "jints and oops must be the same size");
136  _Copy_arrayof_conjoint_jints(from, to, count);
137#endif // AMD64
138}
139