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comparison src/os_cpu/solaris_x86/vm/atomic_solaris_x86.inline.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
26 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
27 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
28
29
30 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
31 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
32
33 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
34 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
35 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
36 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
37 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
38
39 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); }
40 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
41 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); }
42
43 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); }
44 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
45 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); }
46
47 // For Sun Studio - implementation is in solaris_x86_[32/64].il.
48 // For gcc - implementation is just below.
49
50 extern "C" jint _Atomic_add(jint add_value, volatile jint* dest, int mp);
51 extern "C" jint _Atomic_xchg(jint exchange_value, volatile jint* dest);
52 extern "C" jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value, int mp);
53 extern "C" jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp);
54
55 inline jint Atomic::add (jint add_value, volatile jint* dest) {
56 return _Atomic_add(add_value, dest, (int) os::is_MP());
57 }
58
59 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
60 return _Atomic_cmpxchg(exchange_value, dest, compare_value, (int) os::is_MP());
61 }
62
63 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
64 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value, (int) os::is_MP());
65 }
66
67
68 #ifdef AMD64
69 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
70 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
71 extern "C" jlong _Atomic_add_long(jlong add_value, volatile jlong* dest, int mp);
72 extern "C" jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest);
73
74 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
75 return (intptr_t)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest, (int) os::is_MP());
76 }
77
78 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
79 return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest, (int) os::is_MP());
80 }
81
82 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
83 return _Atomic_xchg(exchange_value, dest);
84 }
85
86 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
87 return (intptr_t)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
88 }
89
90 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
91 return (void*)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
92 }
93
94 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
95 return (intptr_t)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value, (int) os::is_MP());
96 }
97
98 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
99 return (void*)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value, (int) os::is_MP());
100 }
101
102 #else // !AMD64
103
104 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
105 return (intptr_t)add((jint)add_value, (volatile jint*)dest);
106 }
107
108 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
109 return (void*)add((jint)add_value, (volatile jint*)dest);
110 }
111
112 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
113 // We noticed a CC5.5 bug (4894807), so keep calling the stub just to be safe.
114 // Will use the inline template version after 4894807 is fixed.
115 // return _Atomic_xchg(exchange_value, dest);
116 return (*os::atomic_xchg_func)(exchange_value, dest);
117 }
118
119 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
120 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
121 }
122
123 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
124 return (void*)xchg((jint)exchange_value, (volatile jint*)dest);
125 }
126
127 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
128 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
129 }
130
131 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
132 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
133 }
134 #endif // AMD64
135
136 #ifdef _GNU_SOURCE
137 // Add a lock prefix to an instruction on an MP machine
138 #define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: "
139
140 extern "C" {
141 inline jint _Atomic_add(jint add_value, volatile jint* dest, int mp) {
142 jint addend = add_value;
143 __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)"
144 : "=r" (addend)
145 : "0" (addend), "r" (dest), "r" (mp)
146 : "cc", "memory");
147 return addend + add_value;
148 }
149
150 #ifdef AMD64
151 inline jlong _Atomic_add_long(jlong add_value, volatile jlong* dest, int mp) {
152 intptr_t addend = add_value;
153 __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)"
154 : "=r" (addend)
155 : "0" (addend), "r" (dest), "r" (mp)
156 : "cc", "memory");
157 return addend + add_value;
158 }
159
160 inline jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest) {
161 __asm__ __volatile__ ("xchgq (%2),%0"
162 : "=r" (exchange_value)
163 : "0" (exchange_value), "r" (dest)
164 : "memory");
165 return exchange_value;
166 }
167
168 #endif // AMD64
169
170 inline jint _Atomic_xchg(jint exchange_value, volatile jint* dest) {
171
172 // 32bit version originally did nothing!!
173
174 __asm__ __volatile__ ("xchgl (%2),%0"
175 : "=r" (exchange_value)
176 : "0" (exchange_value), "r" (dest)
177 : "memory");
178 return exchange_value;
179 }
180
181 inline jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value, int mp) {
182 __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)"
183 : "=a" (exchange_value)
184 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
185 : "cc", "memory");
186 return exchange_value;
187 }
188
189 // This is the interface to the atomic instruction in solaris_i486.s.
190 jlong _Atomic_cmpxchg_long_gcc(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp);
191
192 inline jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp) {
193 #ifdef AMD64
194 __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)"
195 : "=a" (exchange_value)
196 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
197 : "cc", "memory");
198 return exchange_value;
199 #else
200 return _Atomic_cmpxchg_long_gcc(exchange_value, dest, compare_value, os::is_MP());
201
202 #if 0
203 // The code below does not work presumably because of the bug in gcc
204 // The error message says:
205 // can't find a register in class BREG while reloading asm
206 // However I want to save this code and later replace _Atomic_cmpxchg_long_gcc
207 // with such inline asm code:
208
209 volatile jlong_accessor evl, cvl, rv;
210 evl.long_value = exchange_value;
211 cvl.long_value = compare_value;
212 int mp = os::is_MP();
213
214 __asm__ volatile ("cmp $0, %%esi\n\t"
215 "je 1f \n\t"
216 "lock\n\t"
217 "1: cmpxchg8b (%%edi)\n\t"
218 : "=a"(cvl.words[0]), "=d"(cvl.words[1])
219 : "a"(cvl.words[0]), "d"(cvl.words[1]),
220 "b"(evl.words[0]), "c"(evl.words[1]),
221 "D"(dest), "S"(mp)
222 : "cc", "memory");
223 return cvl.long_value;
224 #endif // if 0
225 #endif // AMD64
226 }
227 }
228 #undef LOCK_IF_MP
229
230 #endif // _GNU_SOURCE