1 /*
2 * Copyright (c) 1999, 2013, 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.
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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 "runtime/atomic.hpp"
29 #include "runtime/os.hpp"
30 #include "vm_version_x86.hpp"
31
32 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
33 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
34 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
35
36
37 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
38 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
39
40 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
41 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
42 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
43 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
44 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
45
46 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); }
47 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
48 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); }
49
50 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); }
51 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
52 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); }
53
54 // For Sun Studio - implementation is in solaris_x86_[32/64].il.
55 // For gcc - implementation is just below.
56
57 // The lock prefix can be omitted for certain instructions on uniprocessors; to
58 // facilitate this, os::is_MP() is passed as an additional argument. 64-bit
59 // processors are assumed to be multi-threaded and/or multi-core, so the extra
60 // argument is unnecessary.
61 #ifndef _LP64
62 #define IS_MP_DECL() , int is_mp
63 #define IS_MP_ARG() , (int) os::is_MP()
64 #else
65 #define IS_MP_DECL()
66 #define IS_MP_ARG()
67 #endif // _LP64
68
69 extern "C" {
70 jint _Atomic_add(jint add_value, volatile jint* dest IS_MP_DECL());
71 jint _Atomic_xchg(jint exchange_value, volatile jint* dest);
72 jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest,
73 jint compare_value IS_MP_DECL());
74 jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest,
75 jlong compare_value IS_MP_DECL());
76 }
77
78 inline jint Atomic::add (jint add_value, volatile jint* dest) {
79 return _Atomic_add(add_value, dest IS_MP_ARG());
80 }
81
82 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
83 return _Atomic_xchg(exchange_value, dest);
84 }
85
86 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
87 return _Atomic_cmpxchg(exchange_value, dest, compare_value IS_MP_ARG());
88 }
89
90 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
91 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value IS_MP_ARG());
92 }
93
94
95 #ifdef AMD64
96 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
97 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
98 extern "C" jlong _Atomic_add_long(jlong add_value, volatile jlong* dest);
99 extern "C" jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest);
100
101 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
102 return (intptr_t)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
103 }
104
105 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
106 return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
107 }
108
109 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
110 return (intptr_t)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
111 }
112
113 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
114 return (void*)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
115 }
116
117 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
118 return (intptr_t)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
119 }
120
121 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
122 return (void*)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
123 }
124
125 inline jlong Atomic::load(volatile jlong* src) { return *src; }
126
127 #else // !AMD64
128
129 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
130 return (intptr_t)add((jint)add_value, (volatile jint*)dest);
131 }
132
133 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
134 return (void*)add((jint)add_value, (volatile jint*)dest);
135 }
136
137 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
138 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
139 }
140
141 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
142 return (void*)xchg((jint)exchange_value, (volatile jint*)dest);
143 }
144
145 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
146 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
147 }
148
149 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
150 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
151 }
152
153 extern "C" void _Atomic_move_long(volatile jlong* src, volatile jlong* dst);
154
155 inline jlong Atomic::load(volatile jlong* src) {
156 volatile jlong dest;
157 _Atomic_move_long(src, &dest);
158 return dest;
159 }
160
161 inline void Atomic::store(jlong store_value, jlong* dest) {
162 _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest);
163 }
164
165 inline void Atomic::store(jlong store_value, volatile jlong* dest) {
166 _Atomic_move_long((volatile jlong*)&store_value, dest);
167 }
168
169 #endif // AMD64
170
171 #ifdef _GNU_SOURCE
172 // Add a lock prefix to an instruction on an MP machine
173 #define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: "
174
175 extern "C" {
176 inline jint _Atomic_add(jint add_value, volatile jint* dest, int mp) {
177 jint addend = add_value;
178 __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)"
179 : "=r" (addend)
180 : "0" (addend), "r" (dest), "r" (mp)
181 : "cc", "memory");
182 return addend + add_value;
183 }
184
185 #ifdef AMD64
186 inline jlong _Atomic_add_long(jlong add_value, volatile jlong* dest, int mp) {
187 intptr_t addend = add_value;
188 __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)"
189 : "=r" (addend)
190 : "0" (addend), "r" (dest), "r" (mp)
191 : "cc", "memory");
192 return addend + add_value;
193 }
194
195 inline jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest) {
196 __asm__ __volatile__ ("xchgq (%2),%0"
197 : "=r" (exchange_value)
198 : "0" (exchange_value), "r" (dest)
199 : "memory");
200 return exchange_value;
201 }
202
203 #endif // AMD64
204
205 inline jint _Atomic_xchg(jint exchange_value, volatile jint* dest) {
206 __asm__ __volatile__ ("xchgl (%2),%0"
207 : "=r" (exchange_value)
208 : "0" (exchange_value), "r" (dest)
209 : "memory");
210 return exchange_value;
211 }
212
213 inline jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value, int mp) {
214 __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)"
215 : "=a" (exchange_value)
216 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
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, int mp);
223
224 inline jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp) {
225 #ifdef AMD64
226 __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)"
227 : "=a" (exchange_value)
228 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
229 : "cc", "memory");
230 return exchange_value;
231 #else
232 return _Atomic_cmpxchg_long_gcc(exchange_value, dest, compare_value, os::is_MP());
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 int mp = os::is_MP();
245
246 __asm__ volatile ("cmp $0, %%esi\n\t"
247 "je 1f \n\t"
248 "lock\n\t"
249 "1: cmpxchg8b (%%edi)\n\t"
250 : "=a"(cvl.words[0]), "=d"(cvl.words[1])
251 : "a"(cvl.words[0]), "d"(cvl.words[1]),
252 "b"(evl.words[0]), "c"(evl.words[1]),
253 "D"(dest), "S"(mp)
254 : "cc", "memory");
255 return cvl.long_value;
256 #endif // if 0
257 #endif // AMD64
258 }
259 }
260 #undef LOCK_IF_MP
261
262 #endif // _GNU_SOURCE
263
264 #endif // OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_INLINE_HPP