1 /*
2 * Copyright (c) 1999, 2009, 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 // Implementation of class atomic
26
27 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
28 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
29 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
30 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
31 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
32 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
33
34 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
35 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
36 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
37 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
38 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
39 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
40
41 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); }
42 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
43 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); }
44
45 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); }
46 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
47 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); }
48
49 inline jlong Atomic::load(volatile jlong* src) { return *src; }
50
51 #ifdef _GNU_SOURCE
52
53 inline jint Atomic::add (jint add_value, volatile jint* dest) {
54 intptr_t rv;
55 __asm__ volatile(
56 "1: \n\t"
57 " ld [%2], %%o2\n\t"
58 " add %1, %%o2, %%o3\n\t"
59 " cas [%2], %%o2, %%o3\n\t"
60 " cmp %%o2, %%o3\n\t"
61 " bne 1b\n\t"
62 " nop\n\t"
63 " add %1, %%o2, %0\n\t"
64 : "=r" (rv)
65 : "r" (add_value), "r" (dest)
66 : "memory", "o2", "o3");
67 return rv;
68 }
69
70 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
71 intptr_t rv;
72 #ifdef _LP64
73 __asm__ volatile(
74 "1: \n\t"
75 " ldx [%2], %%o2\n\t"
76 " add %0, %%o2, %%o3\n\t"
77 " casx [%2], %%o2, %%o3\n\t"
78 " cmp %%o2, %%o3\n\t"
79 " bne %%xcc, 1b\n\t"
80 " nop\n\t"
81 " add %0, %%o2, %0\n\t"
82 : "=r" (rv)
83 : "r" (add_value), "r" (dest)
84 : "memory", "o2", "o3");
85 #else //_LP64
86 __asm__ volatile(
87 "1: \n\t"
88 " ld [%2], %%o2\n\t"
89 " add %1, %%o2, %%o3\n\t"
90 " cas [%2], %%o2, %%o3\n\t"
91 " cmp %%o2, %%o3\n\t"
92 " bne 1b\n\t"
93 " nop\n\t"
94 " add %1, %%o2, %0\n\t"
95 : "=r" (rv)
96 : "r" (add_value), "r" (dest)
97 : "memory", "o2", "o3");
98 #endif // _LP64
99 return rv;
100 }
101
102 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
103 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest);
104 }
105
106
107 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
108 intptr_t rv = exchange_value;
109 __asm__ volatile(
110 " swap [%2],%1\n\t"
111 : "=r" (rv)
112 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
113 : "memory");
114 return rv;
115 }
116
117 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
118 intptr_t rv = exchange_value;
119 #ifdef _LP64
120 __asm__ volatile(
121 "1:\n\t"
122 " mov %1, %%o3\n\t"
123 " ldx [%2], %%o2\n\t"
124 " casx [%2], %%o2, %%o3\n\t"
125 " cmp %%o2, %%o3\n\t"
126 " bne %%xcc, 1b\n\t"
127 " nop\n\t"
128 " mov %%o2, %0\n\t"
129 : "=r" (rv)
130 : "r" (exchange_value), "r" (dest)
131 : "memory", "o2", "o3");
132 #else //_LP64
133 __asm__ volatile(
134 "swap [%2],%1\n\t"
135 : "=r" (rv)
136 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
137 : "memory");
138 #endif // _LP64
139 return rv;
140 }
141
142 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
143 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest);
144 }
145
146
147 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
148 jint rv;
149 __asm__ volatile(
150 " cas [%2], %3, %0"
151 : "=r" (rv)
152 : "0" (exchange_value), "r" (dest), "r" (compare_value)
153 : "memory");
154 return rv;
155 }
156
157 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
158 #ifdef _LP64
159 jlong rv;
160 __asm__ volatile(
161 " casx [%2], %3, %0"
162 : "=r" (rv)
163 : "0" (exchange_value), "r" (dest), "r" (compare_value)
164 : "memory");
165 return rv;
166 #else //_LP64
167 assert(VM_Version::v9_instructions_work(), "cas only supported on v9");
168 volatile jlong_accessor evl, cvl, rv;
169 evl.long_value = exchange_value;
170 cvl.long_value = compare_value;
171
172 __asm__ volatile(
173 " sllx %2, 32, %2\n\t"
174 " srl %3, 0, %3\n\t"
175 " or %2, %3, %2\n\t"
176 " sllx %5, 32, %5\n\t"
177 " srl %6, 0, %6\n\t"
178 " or %5, %6, %5\n\t"
179 " casx [%4], %5, %2\n\t"
180 " srl %2, 0, %1\n\t"
181 " srlx %2, 32, %0\n\t"
182 : "=r" (rv.words[0]), "=r" (rv.words[1])
183 : "r" (evl.words[0]), "r" (evl.words[1]), "r" (dest), "r" (cvl.words[0]), "r" (cvl.words[1])
184 : "memory");
185
186 return rv.long_value;
187 #endif //_LP64
188 }
189
190 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
191 intptr_t rv;
192 #ifdef _LP64
193 __asm__ volatile(
194 " casx [%2], %3, %0"
195 : "=r" (rv)
196 : "0" (exchange_value), "r" (dest), "r" (compare_value)
197 : "memory");
198 #else //_LP64
199 __asm__ volatile(
200 " cas [%2], %3, %0"
201 : "=r" (rv)
202 : "0" (exchange_value), "r" (dest), "r" (compare_value)
203 : "memory");
204 #endif // _LP64
205 return rv;
206 }
207
208 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
209 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value);
210 }
211
212 #else // _GNU_SOURCE
213
214 #if defined(COMPILER2) || defined(_LP64)
215
216 // This is the interface to the atomic instructions in solaris_sparc.il.
217 // It's very messy because we need to support v8 and these instructions
218 // are illegal there. When sparc v8 is dropped, we can drop out lots of
219 // this code. Also compiler2 does not support v8 so the conditional code
220 // omits the instruction set check.
221
222 extern "C" jint _Atomic_swap32(jint exchange_value, volatile jint* dest);
223 extern "C" intptr_t _Atomic_swap64(intptr_t exchange_value, volatile intptr_t* dest);
224
225 extern "C" jint _Atomic_cas32(jint exchange_value, volatile jint* dest, jint compare_value);
226 extern "C" intptr_t _Atomic_cas64(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value);
227 extern "C" jlong _Atomic_casl (jlong exchange_value, volatile jlong* dest, jlong compare_value);
228
229 extern "C" jint _Atomic_add32(jint inc, volatile jint* dest);
230 extern "C" intptr_t _Atomic_add64(intptr_t add_value, volatile intptr_t* dest);
231
232
233 inline jint Atomic::add (jint add_value, volatile jint* dest) {
234 return _Atomic_add32(add_value, dest);
235 }
236
237 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
238 #ifdef _LP64
239 return _Atomic_add64(add_value, dest);
240 #else //_LP64
241 return _Atomic_add32(add_value, dest);
242 #endif // _LP64
243 }
244
245 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
246 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest);
247 }
248
249
250 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
251 return _Atomic_swap32(exchange_value, dest);
252 }
253
254 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
255 #ifdef _LP64
256 return _Atomic_swap64(exchange_value, dest);
257 #else // _LP64
258 return _Atomic_swap32(exchange_value, dest);
259 #endif // _LP64
260 }
261
262 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
263 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest);
264 }
265
266
267 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
268 return _Atomic_cas32(exchange_value, dest, compare_value);
269 }
270
271 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
272 #ifdef _LP64
273 // Return 64 bit value in %o0
274 return _Atomic_cas64((intptr_t)exchange_value, (intptr_t *)dest, (intptr_t)compare_value);
275 #else // _LP64
276 assert (VM_Version::v9_instructions_work(), "only supported on v9");
277 // Return 64 bit value in %o0,%o1 by hand
278 return _Atomic_casl(exchange_value, dest, compare_value);
279 #endif // _LP64
280 }
281
282 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
283 #ifdef _LP64
284 return _Atomic_cas64(exchange_value, dest, compare_value);
285 #else // _LP64
286 return _Atomic_cas32(exchange_value, dest, compare_value);
287 #endif // _LP64
288 }
289
290 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
291 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value);
292 }
293
294
295 #else // _LP64 || COMPILER2
296
297
298 // 32-bit compiler1 only
299
300 inline jint Atomic::add (jint add_value, volatile jint* dest) {
301 return (*os::atomic_add_func)(add_value, dest);
302 }
303
304 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
305 return (intptr_t)add((jint)add_value, (volatile jint*)dest);
306 }
307
308 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
309 return (void*)add((jint)add_value, (volatile jint*)dest);
310 }
311
312
313 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
314 return (*os::atomic_xchg_func)(exchange_value, dest);
315 }
316
317 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
318 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
319 }
320
321 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
322 return (void*)xchg((jint)exchange_value, (volatile jint*)dest);
323 }
324
325
326 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
327 return (*os::atomic_cmpxchg_func)(exchange_value, dest, compare_value);
328 }
329
330 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
331 return (*os::atomic_cmpxchg_long_func)(exchange_value, dest, compare_value);
332 }
333
334 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
335 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
336 }
337
338 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
339 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
340 }
341
342 #endif // _LP64 || COMPILER2
343
344 #endif // _GNU_SOURCE