Mercurial > hg > truffle
annotate src/os_cpu/linux_x86/vm/orderAccess_linux_x86.inline.hpp @ 8299:22cab6e509a3
Remove orphaned condition in implicit null check detection
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Fri, 15 Mar 2013 17:26:22 +0100 |
parents | da880ba4edf9 |
children | 63e54c37ac64 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef OS_CPU_LINUX_X86_VM_ORDERACCESS_LINUX_X86_INLINE_HPP |
26 #define OS_CPU_LINUX_X86_VM_ORDERACCESS_LINUX_X86_INLINE_HPP | |
27 | |
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28 #include "runtime/atomic.hpp" |
1972 | 29 #include "runtime/orderAccess.hpp" |
30 #include "vm_version_x86.hpp" | |
31 | |
0 | 32 // Implementation of class OrderAccess. |
33 | |
34 inline void OrderAccess::loadload() { acquire(); } | |
35 inline void OrderAccess::storestore() { release(); } | |
36 inline void OrderAccess::loadstore() { acquire(); } | |
37 inline void OrderAccess::storeload() { fence(); } | |
38 | |
39 inline void OrderAccess::acquire() { | |
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40 volatile intptr_t local_dummy; |
0 | 41 #ifdef AMD64 |
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42 __asm__ volatile ("movq 0(%%rsp), %0" : "=r" (local_dummy) : : "memory"); |
0 | 43 #else |
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44 __asm__ volatile ("movl 0(%%esp),%0" : "=r" (local_dummy) : : "memory"); |
0 | 45 #endif // AMD64 |
46 } | |
47 | |
48 inline void OrderAccess::release() { | |
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49 // Avoid hitting the same cache-line from |
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50 // different threads. |
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51 volatile jint local_dummy = 0; |
0 | 52 } |
53 | |
54 inline void OrderAccess::fence() { | |
55 if (os::is_MP()) { | |
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56 // always use locked addl since mfence is sometimes expensive |
0 | 57 #ifdef AMD64 |
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58 __asm__ volatile ("lock; addl $0,0(%%rsp)" : : : "cc", "memory"); |
0 | 59 #else |
60 __asm__ volatile ("lock; addl $0,0(%%esp)" : : : "cc", "memory"); | |
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61 #endif |
0 | 62 } |
63 } | |
64 | |
65 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { return *p; } | |
66 inline jshort OrderAccess::load_acquire(volatile jshort* p) { return *p; } | |
67 inline jint OrderAccess::load_acquire(volatile jint* p) { return *p; } | |
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68 inline jlong OrderAccess::load_acquire(volatile jlong* p) { return Atomic::load(p); } |
0 | 69 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { return *p; } |
70 inline jushort OrderAccess::load_acquire(volatile jushort* p) { return *p; } | |
71 inline juint OrderAccess::load_acquire(volatile juint* p) { return *p; } | |
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72 inline julong OrderAccess::load_acquire(volatile julong* p) { return Atomic::load((volatile jlong*)p); } |
0 | 73 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { return *p; } |
74 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { return *p; } | |
75 | |
76 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return *p; } | |
77 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return *(void* volatile *)p; } | |
78 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; } | |
79 | |
80 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { *p = v; } | |
81 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { *p = v; } | |
82 inline void OrderAccess::release_store(volatile jint* p, jint v) { *p = v; } | |
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83 inline void OrderAccess::release_store(volatile jlong* p, jlong v) { Atomic::store(v, p); } |
0 | 84 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { *p = v; } |
85 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; } | |
86 inline void OrderAccess::release_store(volatile juint* p, juint v) { *p = v; } | |
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87 inline void OrderAccess::release_store(volatile julong* p, julong v) { Atomic::store((jlong)v, (volatile jlong*)p); } |
0 | 88 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { *p = v; } |
89 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; } | |
90 | |
91 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; } | |
92 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { *(void* volatile *)p = v; } | |
93 | |
94 inline void OrderAccess::store_fence(jbyte* p, jbyte v) { | |
95 __asm__ volatile ( "xchgb (%2),%0" | |
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96 : "=q" (v) |
0 | 97 : "0" (v), "r" (p) |
98 : "memory"); | |
99 } | |
100 inline void OrderAccess::store_fence(jshort* p, jshort v) { | |
101 __asm__ volatile ( "xchgw (%2),%0" | |
102 : "=r" (v) | |
103 : "0" (v), "r" (p) | |
104 : "memory"); | |
105 } | |
106 inline void OrderAccess::store_fence(jint* p, jint v) { | |
107 __asm__ volatile ( "xchgl (%2),%0" | |
108 : "=r" (v) | |
109 : "0" (v), "r" (p) | |
110 : "memory"); | |
111 } | |
112 | |
113 inline void OrderAccess::store_fence(jlong* p, jlong v) { | |
114 #ifdef AMD64 | |
115 __asm__ __volatile__ ("xchgq (%2), %0" | |
116 : "=r" (v) | |
117 : "0" (v), "r" (p) | |
118 : "memory"); | |
119 #else | |
120 *p = v; fence(); | |
121 #endif // AMD64 | |
122 } | |
123 | |
124 // AMD64 copied the bodies for the the signed version. 32bit did this. As long as the | |
125 // compiler does the inlining this is simpler. | |
126 inline void OrderAccess::store_fence(jubyte* p, jubyte v) { store_fence((jbyte*)p, (jbyte)v); } | |
127 inline void OrderAccess::store_fence(jushort* p, jushort v) { store_fence((jshort*)p, (jshort)v); } | |
128 inline void OrderAccess::store_fence(juint* p, juint v) { store_fence((jint*)p, (jint)v); } | |
129 inline void OrderAccess::store_fence(julong* p, julong v) { store_fence((jlong*)p, (jlong)v); } | |
130 inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); } | |
131 inline void OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); } | |
132 | |
133 inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { | |
134 #ifdef AMD64 | |
135 __asm__ __volatile__ ("xchgq (%2), %0" | |
136 : "=r" (v) | |
137 : "0" (v), "r" (p) | |
138 : "memory"); | |
139 #else | |
140 store_fence((jint*)p, (jint)v); | |
141 #endif // AMD64 | |
142 } | |
143 | |
144 inline void OrderAccess::store_ptr_fence(void** p, void* v) { | |
145 #ifdef AMD64 | |
146 __asm__ __volatile__ ("xchgq (%2), %0" | |
147 : "=r" (v) | |
148 : "0" (v), "r" (p) | |
149 : "memory"); | |
150 #else | |
151 store_fence((jint*)p, (jint)v); | |
152 #endif // AMD64 | |
153 } | |
154 | |
155 // Must duplicate definitions instead of calling store_fence because we don't want to cast away volatile. | |
156 inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { | |
157 __asm__ volatile ( "xchgb (%2),%0" | |
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158 : "=q" (v) |
0 | 159 : "0" (v), "r" (p) |
160 : "memory"); | |
161 } | |
162 inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { | |
163 __asm__ volatile ( "xchgw (%2),%0" | |
164 : "=r" (v) | |
165 : "0" (v), "r" (p) | |
166 : "memory"); | |
167 } | |
168 inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { | |
169 __asm__ volatile ( "xchgl (%2),%0" | |
170 : "=r" (v) | |
171 : "0" (v), "r" (p) | |
172 : "memory"); | |
173 } | |
174 | |
175 inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { | |
176 #ifdef AMD64 | |
177 __asm__ __volatile__ ( "xchgq (%2), %0" | |
178 : "=r" (v) | |
179 : "0" (v), "r" (p) | |
180 : "memory"); | |
181 #else | |
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182 release_store(p, v); fence(); |
0 | 183 #endif // AMD64 |
184 } | |
185 | |
186 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { release_store_fence((volatile jbyte*)p, (jbyte)v); } | |
187 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store_fence((volatile jshort*)p, (jshort)v); } | |
188 inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { release_store_fence((volatile jint*)p, (jint)v); } | |
189 inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { release_store_fence((volatile jlong*)p, (jlong)v); } | |
190 | |
191 inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { *p = v; fence(); } | |
192 inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); } | |
193 | |
194 inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { | |
195 #ifdef AMD64 | |
196 __asm__ __volatile__ ( "xchgq (%2), %0" | |
197 : "=r" (v) | |
198 : "0" (v), "r" (p) | |
199 : "memory"); | |
200 #else | |
201 release_store_fence((volatile jint*)p, (jint)v); | |
202 #endif // AMD64 | |
203 } | |
204 inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { | |
205 #ifdef AMD64 | |
206 __asm__ __volatile__ ( "xchgq (%2), %0" | |
207 : "=r" (v) | |
208 : "0" (v), "r" (p) | |
209 : "memory"); | |
210 #else | |
211 release_store_fence((volatile jint*)p, (jint)v); | |
212 #endif // AMD64 | |
213 } | |
1972 | 214 |
215 #endif // OS_CPU_LINUX_X86_VM_ORDERACCESS_LINUX_X86_INLINE_HPP |