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annotate src/os_cpu/solaris_x86/vm/atomic_solaris_x86.inline.hpp @ 1638:b2a00dd3117c
6957084: simplify TaskQueue overflow handling
Reviewed-by: ysr, jmasa
author | jcoomes |
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date | Thu, 01 Jul 2010 21:40:45 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2009, 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 | |
25 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } | |
26 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } | |
27 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } | |
28 | |
29 | |
30 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } | |
31 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } | |
32 | |
33 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } | |
34 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } | |
35 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } | |
36 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } | |
37 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } | |
38 | |
39 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); } | |
40 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); } | |
41 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); } | |
42 | |
43 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); } | |
44 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); } | |
45 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); } | |
46 | |
47 // For Sun Studio - implementation is in solaris_x86_[32/64].il. | |
48 // For gcc - implementation is just below. | |
49 | |
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50 // The lock prefix can be omitted for certain instructions on uniprocessors; to |
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51 // facilitate this, os::is_MP() is passed as an additional argument. 64-bit |
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52 // processors are assumed to be multi-threaded and/or multi-core, so the extra |
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53 // argument is unnecessary. |
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54 #ifndef _LP64 |
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55 #define IS_MP_DECL() , int is_mp |
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56 #define IS_MP_ARG() , (int) os::is_MP() |
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57 #else |
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58 #define IS_MP_DECL() |
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59 #define IS_MP_ARG() |
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60 #endif // _LP64 |
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61 |
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62 extern "C" { |
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63 jint _Atomic_add(jint add_value, volatile jint* dest IS_MP_DECL()); |
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64 jint _Atomic_xchg(jint exchange_value, volatile jint* dest); |
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65 jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, |
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66 jint compare_value IS_MP_DECL()); |
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67 jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, |
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68 jlong compare_value IS_MP_DECL()); |
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69 } |
0 | 70 |
71 inline jint Atomic::add (jint add_value, volatile jint* dest) { | |
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72 return _Atomic_add(add_value, dest IS_MP_ARG()); |
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73 } |
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74 |
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75 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { |
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76 return _Atomic_xchg(exchange_value, dest); |
0 | 77 } |
78 | |
79 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { | |
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80 return _Atomic_cmpxchg(exchange_value, dest, compare_value IS_MP_ARG()); |
0 | 81 } |
82 | |
83 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
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84 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value IS_MP_ARG()); |
0 | 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; } | |
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91 extern "C" jlong _Atomic_add_long(jlong add_value, volatile jlong* dest); |
0 | 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) { | |
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95 return (intptr_t)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest); |
0 | 96 } |
97 | |
98 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { | |
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99 return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest); |
0 | 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) { | |
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111 return (intptr_t)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); |
0 | 112 } |
113 | |
114 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { | |
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115 return (void*)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); |
0 | 116 } |
117 | |
894 | 118 inline jlong Atomic::load(volatile jlong* src) { return *src; } |
119 | |
0 | 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) { | |
139 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); | |
140 } | |
141 | |
142 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { | |
143 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); | |
144 } | |
894 | 145 |
146 extern "C" void _Atomic_load_long(volatile jlong* src, volatile jlong* dst); | |
147 | |
148 inline jlong Atomic::load(volatile jlong* src) { | |
149 volatile jlong dest; | |
150 _Atomic_load_long(src, &dest); | |
151 return dest; | |
152 } | |
153 | |
0 | 154 #endif // AMD64 |
155 | |
156 #ifdef _GNU_SOURCE | |
157 // Add a lock prefix to an instruction on an MP machine | |
158 #define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: " | |
159 | |
160 extern "C" { | |
161 inline jint _Atomic_add(jint add_value, volatile jint* dest, int mp) { | |
162 jint addend = add_value; | |
163 __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)" | |
164 : "=r" (addend) | |
165 : "0" (addend), "r" (dest), "r" (mp) | |
166 : "cc", "memory"); | |
167 return addend + add_value; | |
168 } | |
169 | |
170 #ifdef AMD64 | |
171 inline jlong _Atomic_add_long(jlong add_value, volatile jlong* dest, int mp) { | |
172 intptr_t addend = add_value; | |
173 __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)" | |
174 : "=r" (addend) | |
175 : "0" (addend), "r" (dest), "r" (mp) | |
176 : "cc", "memory"); | |
177 return addend + add_value; | |
178 } | |
179 | |
180 inline jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest) { | |
181 __asm__ __volatile__ ("xchgq (%2),%0" | |
182 : "=r" (exchange_value) | |
183 : "0" (exchange_value), "r" (dest) | |
184 : "memory"); | |
185 return exchange_value; | |
186 } | |
187 | |
188 #endif // AMD64 | |
189 | |
190 inline jint _Atomic_xchg(jint exchange_value, volatile jint* dest) { | |
191 __asm__ __volatile__ ("xchgl (%2),%0" | |
192 : "=r" (exchange_value) | |
193 : "0" (exchange_value), "r" (dest) | |
194 : "memory"); | |
195 return exchange_value; | |
196 } | |
197 | |
198 inline jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value, int mp) { | |
199 __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)" | |
200 : "=a" (exchange_value) | |
201 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp) | |
202 : "cc", "memory"); | |
203 return exchange_value; | |
204 } | |
205 | |
206 // This is the interface to the atomic instruction in solaris_i486.s. | |
207 jlong _Atomic_cmpxchg_long_gcc(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp); | |
208 | |
209 inline jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp) { | |
210 #ifdef AMD64 | |
211 __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)" | |
212 : "=a" (exchange_value) | |
213 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp) | |
214 : "cc", "memory"); | |
215 return exchange_value; | |
216 #else | |
217 return _Atomic_cmpxchg_long_gcc(exchange_value, dest, compare_value, os::is_MP()); | |
218 | |
219 #if 0 | |
220 // The code below does not work presumably because of the bug in gcc | |
221 // The error message says: | |
222 // can't find a register in class BREG while reloading asm | |
223 // However I want to save this code and later replace _Atomic_cmpxchg_long_gcc | |
224 // with such inline asm code: | |
225 | |
226 volatile jlong_accessor evl, cvl, rv; | |
227 evl.long_value = exchange_value; | |
228 cvl.long_value = compare_value; | |
229 int mp = os::is_MP(); | |
230 | |
231 __asm__ volatile ("cmp $0, %%esi\n\t" | |
232 "je 1f \n\t" | |
233 "lock\n\t" | |
234 "1: cmpxchg8b (%%edi)\n\t" | |
235 : "=a"(cvl.words[0]), "=d"(cvl.words[1]) | |
236 : "a"(cvl.words[0]), "d"(cvl.words[1]), | |
237 "b"(evl.words[0]), "c"(evl.words[1]), | |
238 "D"(dest), "S"(mp) | |
239 : "cc", "memory"); | |
240 return cvl.long_value; | |
241 #endif // if 0 | |
242 #endif // AMD64 | |
243 } | |
244 } | |
245 #undef LOCK_IF_MP | |
246 | |
247 #endif // _GNU_SOURCE |