1 /*
2 * Copyright (c) 1999, 2010, 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_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_INLINE_HPP
26 #define OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_INLINE_HPP
27
28 #include "orderAccess_solaris_x86.inline.hpp"
29 #include "runtime/atomic.hpp"
30 #include "runtime/os.hpp"
31 #include "vm_version_x86.hpp"
32
33 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
34 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
35 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
36
37
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 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); }
48 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
49 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); }
50
51 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); }
52 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
53 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); }
54
55 // For Sun Studio - implementation is in solaris_x86_[32/64].il.
56 // For gcc - implementation is just below.
57
58 // The lock prefix can be omitted for certain instructions on uniprocessors; to
59 // facilitate this, os::is_MP() is passed as an additional argument. 64-bit
60 // processors are assumed to be multi-threaded and/or multi-core, so the extra
61 // argument is unnecessary.
62 #ifndef _LP64
63 #define IS_MP_DECL() , int is_mp
64 #define IS_MP_ARG() , (int) os::is_MP()
65 #else
66 #define IS_MP_DECL()
67 #define IS_MP_ARG()
68 #endif // _LP64
69
70 extern "C" {
71 jint _Atomic_add(jint add_value, volatile jint* dest IS_MP_DECL());
72 jint _Atomic_xchg(jint exchange_value, volatile jint* dest);
73 jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest,
74 jint compare_value IS_MP_DECL());
75 jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest,
76 jlong compare_value IS_MP_DECL());
77 }
78
79 inline jint Atomic::add (jint add_value, volatile jint* dest) {
80 return _Atomic_add(add_value, dest IS_MP_ARG());
81 }
82
83 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
84 return _Atomic_xchg(exchange_value, dest);
85 }
86
87 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
88 return _Atomic_cmpxchg(exchange_value, dest, compare_value IS_MP_ARG());
89 }
90
91 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
92 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value IS_MP_ARG());
93 }
94
95
96 #ifdef AMD64
97 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
98 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
99 extern "C" jlong _Atomic_add_long(jlong add_value, volatile jlong* dest);
100 extern "C" jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest);
101
102 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
103 return (intptr_t)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
104 }
105
106 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
107 return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
108 }
109
110 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
111 return (intptr_t)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
112 }
113
114 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
115 return (void*)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
116 }
117
118 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
119 return (intptr_t)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
120 }
121
122 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
123 return (void*)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
124 }
125
126 inline jlong Atomic::load(volatile jlong* src) { return *src; }
127
128 #else // !AMD64
129
130 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
131 return (intptr_t)add((jint)add_value, (volatile jint*)dest);
132 }
133
134 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
135 return (void*)add((jint)add_value, (volatile jint*)dest);
136 }
137
138 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
139 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
140 }
141
142 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
143 return (void*)xchg((jint)exchange_value, (volatile jint*)dest);
144 }
145
146 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
147 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
148 }
149
150 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
151 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
152 }
153
154 extern "C" void _Atomic_load_long(volatile jlong* src, volatile jlong* dst);
155
156 inline jlong Atomic::load(volatile jlong* src) {
157 volatile jlong dest;
158 _Atomic_load_long(src, &dest);
159 return dest;
160 }
161
162 #endif // AMD64
163
164 #ifdef _GNU_SOURCE
165 // Add a lock prefix to an instruction on an MP machine
166 #define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: "
167
168 extern "C" {
169 inline jint _Atomic_add(jint add_value, volatile jint* dest, int mp) {
170 jint addend = add_value;
171 __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)"
172 : "=r" (addend)
173 : "0" (addend), "r" (dest), "r" (mp)
174 : "cc", "memory");
175 return addend + add_value;
176 }
177
178 #ifdef AMD64
179 inline jlong _Atomic_add_long(jlong add_value, volatile jlong* dest, int mp) {
180 intptr_t addend = add_value;
181 __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)"
182 : "=r" (addend)
183 : "0" (addend), "r" (dest), "r" (mp)
184 : "cc", "memory");
185 return addend + add_value;
186 }
187
188 inline jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest) {
189 __asm__ __volatile__ ("xchgq (%2),%0"
190 : "=r" (exchange_value)
191 : "0" (exchange_value), "r" (dest)
192 : "memory");
193 return exchange_value;
194 }
195
196 #endif // AMD64
197
198 inline jint _Atomic_xchg(jint exchange_value, volatile jint* dest) {
199 __asm__ __volatile__ ("xchgl (%2),%0"
200 : "=r" (exchange_value)
201 : "0" (exchange_value), "r" (dest)
202 : "memory");
203 return exchange_value;
204 }
205
206 inline jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value, int mp) {
207 __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)"
208 : "=a" (exchange_value)
209 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
210 : "cc", "memory");
211 return exchange_value;
212 }
213
214 // This is the interface to the atomic instruction in solaris_i486.s.
215 jlong _Atomic_cmpxchg_long_gcc(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp);
216
217 inline jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp) {
218 #ifdef AMD64
219 __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)"
220 : "=a" (exchange_value)
221 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
222 : "cc", "memory");
223 return exchange_value;
224 #else
225 return _Atomic_cmpxchg_long_gcc(exchange_value, dest, compare_value, os::is_MP());
226
227 #if 0
228 // The code below does not work presumably because of the bug in gcc
229 // The error message says:
230 // can't find a register in class BREG while reloading asm
231 // However I want to save this code and later replace _Atomic_cmpxchg_long_gcc
232 // with such inline asm code:
233
234 volatile jlong_accessor evl, cvl, rv;
235 evl.long_value = exchange_value;
236 cvl.long_value = compare_value;
237 int mp = os::is_MP();
238
239 __asm__ volatile ("cmp $0, %%esi\n\t"
240 "je 1f \n\t"
241 "lock\n\t"
242 "1: cmpxchg8b (%%edi)\n\t"
243 : "=a"(cvl.words[0]), "=d"(cvl.words[1])
244 : "a"(cvl.words[0]), "d"(cvl.words[1]),
245 "b"(evl.words[0]), "c"(evl.words[1]),
246 "D"(dest), "S"(mp)
247 : "cc", "memory");
248 return cvl.long_value;
249 #endif // if 0
250 #endif // AMD64
251 }
252 }
253 #undef LOCK_IF_MP
254
255 #endif // _GNU_SOURCE
256
257 #endif // OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_INLINE_HPP