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annotate src/os_cpu/windows_x86/vm/copy_windows_x86.inline.hpp @ 3944:35c656d0b685
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Reviewed-by: kvn
author | never |
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date | Wed, 14 Sep 2011 13:57:32 -0700 |
parents | f95d63e2154a |
children | 16f9fa2bf76c |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2003, 2010, 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 * | |
1552
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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 OS_CPU_WINDOWS_X86_VM_COPY_WINDOWS_X86_INLINE_HPP |
26 #define OS_CPU_WINDOWS_X86_VM_COPY_WINDOWS_X86_INLINE_HPP | |
27 | |
0 | 28 static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { |
29 (void)memmove(to, from, count * HeapWordSize); | |
30 } | |
31 | |
32 static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
33 #ifdef AMD64 | |
34 switch (count) { | |
35 case 8: to[7] = from[7]; | |
36 case 7: to[6] = from[6]; | |
37 case 6: to[5] = from[5]; | |
38 case 5: to[4] = from[4]; | |
39 case 4: to[3] = from[3]; | |
40 case 3: to[2] = from[2]; | |
41 case 2: to[1] = from[1]; | |
42 case 1: to[0] = from[0]; | |
43 case 0: break; | |
44 default: | |
45 (void)memcpy(to, from, count * HeapWordSize); | |
46 break; | |
47 } | |
48 #else | |
49 (void)memcpy(to, from, count * HeapWordSize); | |
50 #endif // AMD64 | |
51 } | |
52 | |
53 static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) { | |
54 switch (count) { | |
55 case 8: to[7] = from[7]; | |
56 case 7: to[6] = from[6]; | |
57 case 6: to[5] = from[5]; | |
58 case 5: to[4] = from[4]; | |
59 case 4: to[3] = from[3]; | |
60 case 3: to[2] = from[2]; | |
61 case 2: to[1] = from[1]; | |
62 case 1: to[0] = from[0]; | |
63 case 0: break; | |
64 default: while (count-- > 0) { | |
65 *to++ = *from++; | |
66 } | |
67 break; | |
68 } | |
69 } | |
70 | |
71 static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
72 (void)memmove(to, from, count * HeapWordSize); | |
73 } | |
74 | |
75 static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
76 pd_disjoint_words(from, to, count); | |
77 } | |
78 | |
79 static void pd_conjoint_bytes(void* from, void* to, size_t count) { | |
80 (void)memmove(to, from, count); | |
81 } | |
82 | |
83 static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) { | |
84 pd_conjoint_bytes(from, to, count); | |
85 } | |
86 | |
87 static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) { | |
88 // FIXME | |
89 (void)memmove(to, from, count << LogBytesPerShort); | |
90 } | |
91 | |
92 static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) { | |
93 // FIXME | |
94 (void)memmove(to, from, count << LogBytesPerInt); | |
95 } | |
96 | |
97 static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) { | |
98 #ifdef AMD64 | |
99 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); | |
100 pd_conjoint_oops_atomic((oop*)from, (oop*)to, count); | |
101 #else | |
102 // Guarantee use of fild/fistp or xmm regs via some asm code, because compilers won't. | |
103 __asm { | |
104 mov eax, from; | |
105 mov edx, to; | |
106 mov ecx, count; | |
107 cmp eax, edx; | |
108 jbe downtest; | |
109 jmp uptest; | |
110 up: | |
111 fild qword ptr [eax]; | |
112 fistp qword ptr [edx]; | |
113 add eax, 8; | |
114 add edx, 8; | |
115 uptest: | |
116 sub ecx, 1; | |
117 jge up; | |
118 jmp done; | |
119 down: | |
120 fild qword ptr [eax][ecx*8]; | |
121 fistp qword ptr [edx][ecx*8]; | |
122 downtest: | |
123 sub ecx, 1; | |
124 jge down; | |
125 done:; | |
126 } | |
127 #endif // AMD64 | |
128 } | |
129 | |
130 static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) { | |
131 // Do better than this: inline memmove body NEEDS CLEANUP | |
132 if (from > to) { | |
133 while (count-- > 0) { | |
134 // Copy forwards | |
135 *to++ = *from++; | |
136 } | |
137 } else { | |
138 from += count - 1; | |
139 to += count - 1; | |
140 while (count-- > 0) { | |
141 // Copy backwards | |
142 *to-- = *from--; | |
143 } | |
144 } | |
145 } | |
146 | |
147 static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) { | |
148 #ifdef AMD64 | |
149 pd_conjoint_bytes_atomic(from, to, count); | |
150 #else | |
151 pd_conjoint_bytes(from, to, count); | |
152 #endif // AMD64 | |
153 } | |
154 | |
155 static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) { | |
156 pd_conjoint_jshorts_atomic((jshort*)from, (jshort*)to, count); | |
157 } | |
158 | |
159 static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) { | |
160 pd_conjoint_jints_atomic((jint*)from, (jint*)to, count); | |
161 } | |
162 | |
163 static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) { | |
164 pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count); | |
165 } | |
166 | |
167 static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) { | |
168 pd_conjoint_oops_atomic((oop*)from, (oop*)to, count); | |
169 } | |
1972 | 170 |
171 #endif // OS_CPU_WINDOWS_X86_VM_COPY_WINDOWS_X86_INLINE_HPP |