1 /*
2 * Copyright (c) 1999, 2011, 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
25 #ifndef OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_INLINE_HPP
26 #define OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_INLINE_HPP
27
28 #include "orderAccess_bsd_x86.inline.hpp"
29 #include "runtime/atomic.hpp"
30 #include "runtime/os.hpp"
31 #include "vm_version_x86.hpp"
32
33 // Implementation of class atomic
34
35 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
36 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
37 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
38 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
39 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
40
41 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
42 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
43 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
44 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
45 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
46
47
48 // Adding a lock prefix to an instruction on MP machine
49 #define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: "
50
51 inline jint Atomic::add (jint add_value, volatile jint* dest) {
52 jint addend = add_value;
53 int mp = os::is_MP();
54 __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)"
55 : "=r" (addend)
56 : "0" (addend), "r" (dest), "r" (mp)
57 : "cc", "memory");
58 return addend + add_value;
59 }
60
61 inline void Atomic::inc (volatile jint* dest) {
62 int mp = os::is_MP();
63 __asm__ volatile (LOCK_IF_MP(%1) "addl $1,(%0)" :
64 : "r" (dest), "r" (mp) : "cc", "memory");
65 }
66
67 inline void Atomic::inc_ptr(volatile void* dest) {
68 inc_ptr((volatile intptr_t*)dest);
69 }
70
71 inline void Atomic::dec (volatile jint* dest) {
72 int mp = os::is_MP();
73 __asm__ volatile (LOCK_IF_MP(%1) "subl $1,(%0)" :
74 : "r" (dest), "r" (mp) : "cc", "memory");
75 }
76
77 inline void Atomic::dec_ptr(volatile void* dest) {
78 dec_ptr((volatile intptr_t*)dest);
79 }
80
81 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
82 __asm__ volatile ( "xchgl (%2),%0"
83 : "=r" (exchange_value)
84 : "0" (exchange_value), "r" (dest)
85 : "memory");
86 return exchange_value;
87 }
88
89 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
90 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest);
91 }
92
93
94 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
95 int mp = os::is_MP();
96 __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)"
97 : "=a" (exchange_value)
98 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
99 : "cc", "memory");
100 return exchange_value;
101 }
102
103 #ifdef AMD64
104 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
105 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
106
107 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
108 intptr_t addend = add_value;
109 bool mp = os::is_MP();
110 __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)"
111 : "=r" (addend)
112 : "0" (addend), "r" (dest), "r" (mp)
113 : "cc", "memory");
114 return addend + add_value;
115 }
116
117 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
118 return (void*)add_ptr(add_value, (volatile intptr_t*)dest);
119 }
120
121 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
122 bool mp = os::is_MP();
123 __asm__ __volatile__ (LOCK_IF_MP(%1) "addq $1,(%0)"
124 :
125 : "r" (dest), "r" (mp)
126 : "cc", "memory");
127 }
128
129 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
130 bool mp = os::is_MP();
131 __asm__ __volatile__ (LOCK_IF_MP(%1) "subq $1,(%0)"
132 :
133 : "r" (dest), "r" (mp)
134 : "cc", "memory");
135 }
136
137 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
138 __asm__ __volatile__ ("xchgq (%2),%0"
139 : "=r" (exchange_value)
140 : "0" (exchange_value), "r" (dest)
141 : "memory");
142 return exchange_value;
143 }
144
145 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
146 bool mp = os::is_MP();
147 __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)"
148 : "=a" (exchange_value)
149 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
150 : "cc", "memory");
151 return exchange_value;
152 }
153
154 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
155 return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
156 }
157
158 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
159 return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
160 }
161
162 inline jlong Atomic::load(volatile jlong* src) { return *src; }
163
164 #else // !AMD64
165
166 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
167 return (intptr_t)Atomic::add((jint)add_value, (volatile jint*)dest);
168 }
169
170 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
171 return (void*)Atomic::add((jint)add_value, (volatile jint*)dest);
172 }
173
174
175 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
176 inc((volatile jint*)dest);
177 }
178
179 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
180 dec((volatile jint*)dest);
181 }
182
183 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
184 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
185 }
186
187 extern "C" {
188 // defined in bsd_x86.s
189 jlong _Atomic_cmpxchg_long(jlong, volatile jlong*, jlong, bool);
190 void _Atomic_move_long(volatile jlong* src, volatile jlong* dst);
191 }
192
193 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
194 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value, os::is_MP());
195 }
196
197 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
198 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
199 }
200
201 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
202 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
203 }
204
205 inline jlong Atomic::load(volatile jlong* src) {
206 volatile jlong dest;
207 _Atomic_move_long(src, &dest);
208 return dest;
209 }
210
211 inline void Atomic::store(jlong store_value, jlong* dest) {
212 _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest);
213 }
214
215 inline void Atomic::store(jlong store_value, volatile jlong* dest) {
216 _Atomic_move_long((volatile jlong*)&store_value, dest);
217 }
218
219 #endif // AMD64
220
221 #endif // OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_INLINE_HPP