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_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP
26 #define OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP
27
28 #include "orderAccess_windows_x86.inline.hpp"
29 #include "runtime/atomic.hpp"
30 #include "runtime/os.hpp"
31 #include "vm_version_x86.hpp"
32
33 // The following alternative implementations are needed because
34 // Windows 95 doesn't support (some of) the corresponding Windows NT
35 // calls. Furthermore, these versions allow inlining in the caller.
36 // (More precisely: The documentation for InterlockedExchange says
37 // it is supported for Windows 95. However, when single-stepping
38 // through the assembly code we cannot step into the routine and
39 // when looking at the routine address we see only garbage code.
40 // Better safe then sorry!). Was bug 7/31/98 (gri).
41 //
42 // Performance note: On uniprocessors, the 'lock' prefixes are not
43 // necessary (and expensive). We should generate separate cases if
44 // this becomes a performance problem.
45
46 #pragma warning(disable: 4035) // Disables warnings reporting missing return statement
47
48 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
49 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
50 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
51
52 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
53 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
54
55 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
56 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
57 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
58
59
60 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
61 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
62
63 // Adding a lock prefix to an instruction on MP machine
64 // VC++ doesn't like the lock prefix to be on a single line
65 // so we can't insert a label after the lock prefix.
66 // By emitting a lock prefix, we can define a label after it.
67 #define LOCK_IF_MP(mp) __asm cmp mp, 0 \
68 __asm je L0 \
69 __asm _emit 0xF0 \
70 __asm L0:
71
72 #ifdef AMD64
73 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
74 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
75
76 inline jint Atomic::add (jint add_value, volatile jint* dest) {
77 return (jint)(*os::atomic_add_func)(add_value, dest);
78 }
79
80 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
81 return (intptr_t)(*os::atomic_add_ptr_func)(add_value, dest);
82 }
83
84 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
85 return (void*)(*os::atomic_add_ptr_func)(add_value, (volatile intptr_t*)dest);
86 }
87
88 inline void Atomic::inc (volatile jint* dest) {
89 (void)add (1, dest);
90 }
91
92 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
93 (void)add_ptr(1, dest);
94 }
95
96 inline void Atomic::inc_ptr(volatile void* dest) {
97 (void)add_ptr(1, dest);
98 }
99
100 inline void Atomic::dec (volatile jint* dest) {
101 (void)add (-1, dest);
102 }
103
104 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
105 (void)add_ptr(-1, dest);
106 }
107
108 inline void Atomic::dec_ptr(volatile void* dest) {
109 (void)add_ptr(-1, dest);
110 }
111
112 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
113 return (jint)(*os::atomic_xchg_func)(exchange_value, dest);
114 }
115
116 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
117 return (intptr_t)(os::atomic_xchg_ptr_func)(exchange_value, dest);
118 }
119
120 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
121 return (void *)(os::atomic_xchg_ptr_func)((intptr_t)exchange_value, (volatile intptr_t*)dest);
122 }
123
124 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
125 return (*os::atomic_cmpxchg_func)(exchange_value, dest, compare_value);
126 }
127
128 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
129 return (*os::atomic_cmpxchg_long_func)(exchange_value, dest, compare_value);
130 }
131
132 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
133 return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
134 }
135
136 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
137 return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
138 }
139
140 #else // !AMD64
141
142 //inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
143 //inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
144 inline jint Atomic::add (jint add_value, volatile jint* dest) {
145 int mp = os::is_MP();
146 __asm {
147 mov edx, dest;
148 mov eax, add_value;
149 mov ecx, eax;
150 LOCK_IF_MP(mp)
151 xadd dword ptr [edx], eax;
152 add eax, ecx;
153 }
154 }
155
156 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
157 return (intptr_t)add((jint)add_value, (volatile jint*)dest);
158 }
159
160 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
161 return (void*)add((jint)add_value, (volatile jint*)dest);
162 }
163
164 inline void Atomic::inc (volatile jint* dest) {
165 // alternative for InterlockedIncrement
166 int mp = os::is_MP();
167 __asm {
168 mov edx, dest;
169 LOCK_IF_MP(mp)
170 add dword ptr [edx], 1;
171 }
172 }
173
174 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
175 inc((volatile jint*)dest);
176 }
177
178 inline void Atomic::inc_ptr(volatile void* dest) {
179 inc((volatile jint*)dest);
180 }
181
182 inline void Atomic::dec (volatile jint* dest) {
183 // alternative for InterlockedDecrement
184 int mp = os::is_MP();
185 __asm {
186 mov edx, dest;
187 LOCK_IF_MP(mp)
188 sub dword ptr [edx], 1;
189 }
190 }
191
192 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
193 dec((volatile jint*)dest);
194 }
195
196 inline void Atomic::dec_ptr(volatile void* dest) {
197 dec((volatile jint*)dest);
198 }
199
200 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
201 // alternative for InterlockedExchange
202 __asm {
203 mov eax, exchange_value;
204 mov ecx, dest;
205 xchg eax, dword ptr [ecx];
206 }
207 }
208
209 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
210 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
211 }
212
213 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
214 return (void*)xchg((jint)exchange_value, (volatile jint*)dest);
215 }
216
217 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
218 // alternative for InterlockedCompareExchange
219 int mp = os::is_MP();
220 __asm {
221 mov edx, dest
222 mov ecx, exchange_value
223 mov eax, compare_value
224 LOCK_IF_MP(mp)
225 cmpxchg dword ptr [edx], ecx
226 }
227 }
228
229 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
230 int mp = os::is_MP();
231 jint ex_lo = (jint)exchange_value;
232 jint ex_hi = *( ((jint*)&exchange_value) + 1 );
233 jint cmp_lo = (jint)compare_value;
234 jint cmp_hi = *( ((jint*)&compare_value) + 1 );
235 __asm {
236 push ebx
237 push edi
238 mov eax, cmp_lo
239 mov edx, cmp_hi
240 mov edi, dest
241 mov ebx, ex_lo
242 mov ecx, ex_hi
243 LOCK_IF_MP(mp)
244 cmpxchg8b qword ptr [edi]
245 pop edi
246 pop ebx
247 }
248 }
249
250 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
251 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
252 }
253
254 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
255 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
256 }
257 #endif // AMD64
258
259 #pragma warning(default: 4035) // Enables warnings reporting missing return statement
260
261 #endif // OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP