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_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP
26 #define OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP
27
28 #include "runtime/atomic.hpp"
29 #include "runtime/os.hpp"
30 #include "vm_version_x86.hpp"
31
32 // The following alternative implementations are needed because
33 // Windows 95 doesn't support (some of) the corresponding Windows NT
34 // calls. Furthermore, these versions allow inlining in the caller.
35 // (More precisely: The documentation for InterlockedExchange says
36 // it is supported for Windows 95. However, when single-stepping
37 // through the assembly code we cannot step into the routine and
38 // when looking at the routine address we see only garbage code.
39 // Better safe then sorry!). Was bug 7/31/98 (gri).
40 //
41 // Performance note: On uniprocessors, the 'lock' prefixes are not
42 // necessary (and expensive). We should generate separate cases if
43 // this becomes a performance problem.
44
45 #pragma warning(disable: 4035) // Disables warnings reporting missing return statement
46
47 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
48 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
49 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
50
51 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
52 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
53
54 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
55 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
56 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
57
58
59 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
60 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
61
62 // Adding a lock prefix to an instruction on MP machine
63 // VC++ doesn't like the lock prefix to be on a single line
64 // so we can't insert a label after the lock prefix.
65 // By emitting a lock prefix, we can define a label after it.
66 #define LOCK_IF_MP(mp) __asm cmp mp, 0 \
67 __asm je L0 \
68 __asm _emit 0xF0 \
69 __asm L0:
70
71 #ifdef AMD64
72 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
73 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
74
75 inline jint Atomic::add (jint add_value, volatile jint* dest) {
76 return (jint)(*os::atomic_add_func)(add_value, dest);
77 }
78
79 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
80 return (intptr_t)(*os::atomic_add_ptr_func)(add_value, dest);
81 }
82
83 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
84 return (void*)(*os::atomic_add_ptr_func)(add_value, (volatile intptr_t*)dest);
85 }
86
87 inline void Atomic::inc (volatile jint* dest) {
88 (void)add (1, dest);
89 }
90
91 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
92 (void)add_ptr(1, dest);
93 }
94
95 inline void Atomic::inc_ptr(volatile void* dest) {
96 (void)add_ptr(1, dest);
97 }
98
99 inline void Atomic::dec (volatile jint* dest) {
100 (void)add (-1, dest);
101 }
102
103 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
104 (void)add_ptr(-1, dest);
105 }
106
107 inline void Atomic::dec_ptr(volatile void* dest) {
108 (void)add_ptr(-1, dest);
109 }
110
111 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
112 return (jint)(*os::atomic_xchg_func)(exchange_value, dest);
113 }
114
115 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
116 return (intptr_t)(os::atomic_xchg_ptr_func)(exchange_value, dest);
117 }
118
119 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
120 return (void *)(os::atomic_xchg_ptr_func)((intptr_t)exchange_value, (volatile intptr_t*)dest);
121 }
122
123 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
124 return (*os::atomic_cmpxchg_func)(exchange_value, dest, compare_value);
125 }
126
127 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
128 return (*os::atomic_cmpxchg_long_func)(exchange_value, dest, compare_value);
129 }
130
131 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
132 return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
133 }
134
135 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
136 return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
137 }
138
139 inline jlong Atomic::load(volatile jlong* src) { return *src; }
140
141 #else // !AMD64
142
143 inline jint Atomic::add (jint add_value, volatile jint* dest) {
144 int mp = os::is_MP();
145 __asm {
146 mov edx, dest;
147 mov eax, add_value;
148 mov ecx, eax;
149 LOCK_IF_MP(mp)
150 xadd dword ptr [edx], eax;
151 add eax, ecx;
152 }
153 }
154
155 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
156 return (intptr_t)add((jint)add_value, (volatile jint*)dest);
157 }
158
159 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
160 return (void*)add((jint)add_value, (volatile jint*)dest);
161 }
162
163 inline void Atomic::inc (volatile jint* dest) {
164 // alternative for InterlockedIncrement
165 int mp = os::is_MP();
166 __asm {
167 mov edx, dest;
168 LOCK_IF_MP(mp)
169 add dword ptr [edx], 1;
170 }
171 }
172
173 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
174 inc((volatile jint*)dest);
175 }
176
177 inline void Atomic::inc_ptr(volatile void* dest) {
178 inc((volatile jint*)dest);
179 }
180
181 inline void Atomic::dec (volatile jint* dest) {
182 // alternative for InterlockedDecrement
183 int mp = os::is_MP();
184 __asm {
185 mov edx, dest;
186 LOCK_IF_MP(mp)
187 sub dword ptr [edx], 1;
188 }
189 }
190
191 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
192 dec((volatile jint*)dest);
193 }
194
195 inline void Atomic::dec_ptr(volatile void* dest) {
196 dec((volatile jint*)dest);
197 }
198
199 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
200 // alternative for InterlockedExchange
201 __asm {
202 mov eax, exchange_value;
203 mov ecx, dest;
204 xchg eax, dword ptr [ecx];
205 }
206 }
207
208 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
209 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
210 }
211
212 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
213 return (void*)xchg((jint)exchange_value, (volatile jint*)dest);
214 }
215
216 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
217 // alternative for InterlockedCompareExchange
218 int mp = os::is_MP();
219 __asm {
220 mov edx, dest
221 mov ecx, exchange_value
222 mov eax, compare_value
223 LOCK_IF_MP(mp)
224 cmpxchg dword ptr [edx], ecx
225 }
226 }
227
228 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
229 int mp = os::is_MP();
230 jint ex_lo = (jint)exchange_value;
231 jint ex_hi = *( ((jint*)&exchange_value) + 1 );
232 jint cmp_lo = (jint)compare_value;
233 jint cmp_hi = *( ((jint*)&compare_value) + 1 );
234 __asm {
235 push ebx
236 push edi
237 mov eax, cmp_lo
238 mov edx, cmp_hi
239 mov edi, dest
240 mov ebx, ex_lo
241 mov ecx, ex_hi
242 LOCK_IF_MP(mp)
243 cmpxchg8b qword ptr [edi]
244 pop edi
245 pop ebx
246 }
247 }
248
249 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
250 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
251 }
252
253 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
254 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
255 }
256
257 inline jlong Atomic::load(volatile jlong* src) {
258 volatile jlong dest;
259 volatile jlong* pdest = &dest;
260 __asm {
261 mov eax, src
262 fild qword ptr [eax]
263 mov eax, pdest
264 fistp qword ptr [eax]
265 }
266 return dest;
267 }
268
269 inline void Atomic::store(jlong store_value, volatile jlong* dest) {
270 volatile jlong* src = &store_value;
271 __asm {
272 mov eax, src
273 fild qword ptr [eax]
274 mov eax, dest
275 fistp qword ptr [eax]
276 }
277 }
278
279 inline void Atomic::store(jlong store_value, jlong* dest) {
280 Atomic::store(store_value, (volatile jlong*)dest);
281 }
282
283 #endif // AMD64
284
285 #pragma warning(default: 4035) // Enables warnings reporting missing return statement
286
287 #endif // OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP