1 /*
2 * Copyright (c) 1999, 2017, 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_HPP
26 #define OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP
27
28 #include "runtime/os.hpp"
29
30 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
31 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
32 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
33
34
35 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
36 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
37
38 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
39 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
40 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
41 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
42 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
43
44 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); }
45 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
46 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); }
47
48 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); }
49 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
50 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); }
51
52 // For Sun Studio - implementation is in solaris_x86_[32/64].il.
53 // For gcc - implementation is just below.
54
55 extern "C" {
56 jint _Atomic_add(jint add_value, volatile jint* dest);
57 jint _Atomic_xchg(jint exchange_value, volatile jint* dest);
58 jbyte _Atomic_cmpxchg_byte(jbyte exchange_value, volatile jbyte* dest,
59 jbyte compare_value);
60 jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest,
61 jint compare_value);
62 jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest,
63 jlong compare_value);
64 }
65
66 inline jint Atomic::add (jint add_value, volatile jint* dest) {
67 return _Atomic_add(add_value, dest);
68 }
69
70 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
71 return _Atomic_xchg(exchange_value, dest);
72 }
73
74 #define VM_HAS_SPECIALIZED_CMPXCHG_BYTE
75 inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value, cmpxchg_memory_order order) {
76 return _Atomic_cmpxchg_byte(exchange_value, dest, compare_value);
77 }
78
79 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value, cmpxchg_memory_order order) {
80 return _Atomic_cmpxchg(exchange_value, dest, compare_value);
81 }
82
83 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value, cmpxchg_memory_order order) {
84 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value);
85 }
86
87
88 #ifdef AMD64
89 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
90 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
91 extern "C" jlong _Atomic_add_long(jlong add_value, volatile jlong* dest);
92 extern "C" jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest);
93
94 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
95 return (intptr_t)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
96 }
97
98 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
99 return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
100 }
101
102 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
103 return (intptr_t)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
104 }
105
106 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
107 return (void*)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
108 }
109
110 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order) {
111 return (intptr_t)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
112 }
113
114 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) {
115 return (void*)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
116 }
117
118 inline jlong Atomic::load(const volatile jlong* src) { return *src; }
119
120 #else // !AMD64
121
122 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
123 return (intptr_t)add((jint)add_value, (volatile jint*)dest);
124 }
125
126 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
127 return (void*)add((jint)add_value, (volatile jint*)dest);
128 }
129
130 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
131 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
132 }
133
134 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
135 return (void*)xchg((jint)exchange_value, (volatile jint*)dest);
136 }
137
138 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order) {
139 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order);
140 }
141
142 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) {
143 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order);
144 }
145
146 extern "C" void _Atomic_move_long(const volatile jlong* src, volatile jlong* dst);
147
148 inline jlong Atomic::load(const volatile jlong* src) {
149 volatile jlong dest;
150 _Atomic_move_long(src, &dest);
151 return dest;
152 }
153
154 inline void Atomic::store(jlong store_value, jlong* dest) {
155 _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest);
156 }
157
158 inline void Atomic::store(jlong store_value, volatile jlong* dest) {
159 _Atomic_move_long((volatile jlong*)&store_value, dest);
160 }
161
162 #endif // AMD64
163
164 #ifdef _GNU_SOURCE
165
166 extern "C" {
167 inline jint _Atomic_add(jint add_value, volatile jint* dest) {
168 jint addend = add_value;
169 __asm__ volatile ("lock xaddl %0,(%2)"
170 : "=r" (addend)
171 : "0" (addend), "r" (dest)
172 : "cc", "memory");
173 return addend + add_value;
174 }
175
176 #ifdef AMD64
177 inline jlong _Atomic_add_long(jlong add_value, volatile jlong* dest) {
178 intptr_t addend = add_value;
179 __asm__ __volatile__ ("lock xaddq %0,(%2)"
180 : "=r" (addend)
181 : "0" (addend), "r" (dest)
182 : "cc", "memory");
183 return addend + add_value;
184 }
185
186 inline jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest) {
187 __asm__ __volatile__ ("xchgq (%2),%0"
188 : "=r" (exchange_value)
189 : "0" (exchange_value), "r" (dest)
190 : "memory");
191 return exchange_value;
192 }
193
194 #endif // AMD64
195
196 inline jint _Atomic_xchg(jint exchange_value, volatile jint* dest) {
197 __asm__ __volatile__ ("xchgl (%2),%0"
198 : "=r" (exchange_value)
199 : "0" (exchange_value), "r" (dest)
200 : "memory");
201 return exchange_value;
202 }
203
204 inline jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value) {
205 __asm__ volatile ("lock cmpxchgl %1,(%3)"
206 : "=a" (exchange_value)
207 : "r" (exchange_value), "a" (compare_value), "r" (dest)
208 : "cc", "memory");
209 return exchange_value;
210 }
211
212
213 inline jbyte _Atomic_cmpxchg_byte(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) {
214 __asm__ volatile ("lock cmpxchgb %1,(%3)"
215 : "=a" (exchange_value)
216 : "q" (exchange_value), "a" (compare_value), "r" (dest)
217 : "cc", "memory");
218 return exchange_value;
219 }
220
221 // This is the interface to the atomic instruction in solaris_i486.s.
222 jlong _Atomic_cmpxchg_long_gcc(jlong exchange_value, volatile jlong* dest, jlong compare_value);
223
224 inline jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
225 #ifdef AMD64
226 __asm__ __volatile__ ("lock cmpxchgq %1,(%3)"
227 : "=a" (exchange_value)
228 : "r" (exchange_value), "a" (compare_value), "r" (dest)
229 : "cc", "memory");
230 return exchange_value;
231 #else
232 return _Atomic_cmpxchg_long_gcc(exchange_value, dest, compare_value);
233
234 #if 0
235 // The code below does not work presumably because of the bug in gcc
236 // The error message says:
237 // can't find a register in class BREG while reloading asm
238 // However I want to save this code and later replace _Atomic_cmpxchg_long_gcc
239 // with such inline asm code:
240
241 volatile jlong_accessor evl, cvl, rv;
242 evl.long_value = exchange_value;
243 cvl.long_value = compare_value;
244
245 __asm__ volatile (
246 "lock cmpxchg8b (%%edi)\n\t"
247 : "=a"(cvl.words[0]), "=d"(cvl.words[1])
248 : "a"(cvl.words[0]), "d"(cvl.words[1]),
249 "b"(evl.words[0]), "c"(evl.words[1]),
250 "D"(dest)
251 : "cc", "memory");
252 return cvl.long_value;
253 #endif // if 0
254 #endif // AMD64
255 }
256 }
257
258 #endif // _GNU_SOURCE
259
260 #endif // OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP