1 /* 2 * Copyright (c) 1999, 2009, 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 // Implementation of class atomic 26 27 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } 28 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } 29 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } 30 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 31 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } 32 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } 33 34 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } 35 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } 36 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } 37 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 38 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } 39 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } 40 41 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); } 42 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); } 43 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); } 44 45 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); } 46 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); } 47 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); } 48 49 inline jlong Atomic::load(volatile jlong* src) { return *src; } 50 51 #ifdef _GNU_SOURCE 52 53 inline jint Atomic::add (jint add_value, volatile jint* dest) { 54 intptr_t rv; 55 __asm__ volatile( 56 "1: \n\t" 57 " ld [%2], %%o2\n\t" 58 " add %1, %%o2, %%o3\n\t" 59 " cas [%2], %%o2, %%o3\n\t" 60 " cmp %%o2, %%o3\n\t" 61 " bne 1b\n\t" 62 " nop\n\t" 63 " add %1, %%o2, %0\n\t" 64 : "=r" (rv) 65 : "r" (add_value), "r" (dest) 66 : "memory", "o2", "o3"); 67 return rv; 68 } 69 70 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 71 intptr_t rv; 72 #ifdef _LP64 73 __asm__ volatile( 74 "1: \n\t" 75 " ldx [%2], %%o2\n\t" 76 " add %0, %%o2, %%o3\n\t" 77 " casx [%2], %%o2, %%o3\n\t" 78 " cmp %%o2, %%o3\n\t" 79 " bne %%xcc, 1b\n\t" 80 " nop\n\t" 81 " add %0, %%o2, %0\n\t" 82 : "=r" (rv) 83 : "r" (add_value), "r" (dest) 84 : "memory", "o2", "o3"); 85 #else //_LP64 86 __asm__ volatile( 87 "1: \n\t" 88 " ld [%2], %%o2\n\t" 89 " add %1, %%o2, %%o3\n\t" 90 " cas [%2], %%o2, %%o3\n\t" 91 " cmp %%o2, %%o3\n\t" 92 " bne 1b\n\t" 93 " nop\n\t" 94 " add %1, %%o2, %0\n\t" 95 : "=r" (rv) 96 : "r" (add_value), "r" (dest) 97 : "memory", "o2", "o3"); 98 #endif // _LP64 99 return rv; 100 } 101 102 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 103 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest); 104 } 105 106 107 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 108 intptr_t rv = exchange_value; 109 __asm__ volatile( 110 " swap [%2],%1\n\t" 111 : "=r" (rv) 112 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest) 113 : "memory"); 114 return rv; 115 } 116 117 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 118 intptr_t rv = exchange_value; 119 #ifdef _LP64 120 __asm__ volatile( 121 "1:\n\t" 122 " mov %1, %%o3\n\t" 123 " ldx [%2], %%o2\n\t" 124 " casx [%2], %%o2, %%o3\n\t" 125 " cmp %%o2, %%o3\n\t" 126 " bne %%xcc, 1b\n\t" 127 " nop\n\t" 128 " mov %%o2, %0\n\t" 129 : "=r" (rv) 130 : "r" (exchange_value), "r" (dest) 131 : "memory", "o2", "o3"); 132 #else //_LP64 133 __asm__ volatile( 134 "swap [%2],%1\n\t" 135 : "=r" (rv) 136 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest) 137 : "memory"); 138 #endif // _LP64 139 return rv; 140 } 141 142 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 143 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest); 144 } 145 146 147 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { 148 jint rv; 149 __asm__ volatile( 150 " cas [%2], %3, %0" 151 : "=r" (rv) 152 : "0" (exchange_value), "r" (dest), "r" (compare_value) 153 : "memory"); 154 return rv; 155 } 156 157 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { 158 #ifdef _LP64 159 jlong rv; 160 __asm__ volatile( 161 " casx [%2], %3, %0" 162 : "=r" (rv) 163 : "0" (exchange_value), "r" (dest), "r" (compare_value) 164 : "memory"); 165 return rv; 166 #else //_LP64 167 assert(VM_Version::v9_instructions_work(), "cas only supported on v9"); 168 volatile jlong_accessor evl, cvl, rv; 169 evl.long_value = exchange_value; 170 cvl.long_value = compare_value; 171 172 __asm__ volatile( 173 " sllx %2, 32, %2\n\t" 174 " srl %3, 0, %3\n\t" 175 " or %2, %3, %2\n\t" 176 " sllx %5, 32, %5\n\t" 177 " srl %6, 0, %6\n\t" 178 " or %5, %6, %5\n\t" 179 " casx [%4], %5, %2\n\t" 180 " srl %2, 0, %1\n\t" 181 " srlx %2, 32, %0\n\t" 182 : "=r" (rv.words[0]), "=r" (rv.words[1]) 183 : "r" (evl.words[0]), "r" (evl.words[1]), "r" (dest), "r" (cvl.words[0]), "r" (cvl.words[1]) 184 : "memory"); 185 186 return rv.long_value; 187 #endif //_LP64 188 } 189 190 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { 191 intptr_t rv; 192 #ifdef _LP64 193 __asm__ volatile( 194 " casx [%2], %3, %0" 195 : "=r" (rv) 196 : "0" (exchange_value), "r" (dest), "r" (compare_value) 197 : "memory"); 198 #else //_LP64 199 __asm__ volatile( 200 " cas [%2], %3, %0" 201 : "=r" (rv) 202 : "0" (exchange_value), "r" (dest), "r" (compare_value) 203 : "memory"); 204 #endif // _LP64 205 return rv; 206 } 207 208 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 209 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value); 210 } 211 212 #else // _GNU_SOURCE 213 214 #if defined(COMPILER2) || defined(_LP64) 215 216 // This is the interface to the atomic instructions in solaris_sparc.il. 217 // It's very messy because we need to support v8 and these instructions 218 // are illegal there. When sparc v8 is dropped, we can drop out lots of 219 // this code. Also compiler2 does not support v8 so the conditional code 220 // omits the instruction set check. 221 222 extern "C" jint _Atomic_swap32(jint exchange_value, volatile jint* dest); 223 extern "C" intptr_t _Atomic_swap64(intptr_t exchange_value, volatile intptr_t* dest); 224 225 extern "C" jint _Atomic_cas32(jint exchange_value, volatile jint* dest, jint compare_value); 226 extern "C" intptr_t _Atomic_cas64(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value); 227 extern "C" jlong _Atomic_casl (jlong exchange_value, volatile jlong* dest, jlong compare_value); 228 229 extern "C" jint _Atomic_add32(jint inc, volatile jint* dest); 230 extern "C" intptr_t _Atomic_add64(intptr_t add_value, volatile intptr_t* dest); 231 232 233 inline jint Atomic::add (jint add_value, volatile jint* dest) { 234 return _Atomic_add32(add_value, dest); 235 } 236 237 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 238 #ifdef _LP64 239 return _Atomic_add64(add_value, dest); 240 #else //_LP64 241 return _Atomic_add32(add_value, dest); 242 #endif // _LP64 243 } 244 245 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 246 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest); 247 } 248 249 250 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 251 return _Atomic_swap32(exchange_value, dest); 252 } 253 254 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 255 #ifdef _LP64 256 return _Atomic_swap64(exchange_value, dest); 257 #else // _LP64 258 return _Atomic_swap32(exchange_value, dest); 259 #endif // _LP64 260 } 261 262 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 263 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest); 264 } 265 266 267 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { 268 return _Atomic_cas32(exchange_value, dest, compare_value); 269 } 270 271 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { 272 #ifdef _LP64 273 // Return 64 bit value in %o0 274 return _Atomic_cas64((intptr_t)exchange_value, (intptr_t *)dest, (intptr_t)compare_value); 275 #else // _LP64 276 assert (VM_Version::v9_instructions_work(), "only supported on v9"); 277 // Return 64 bit value in %o0,%o1 by hand 278 return _Atomic_casl(exchange_value, dest, compare_value); 279 #endif // _LP64 280 } 281 282 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { 283 #ifdef _LP64 284 return _Atomic_cas64(exchange_value, dest, compare_value); 285 #else // _LP64 286 return _Atomic_cas32(exchange_value, dest, compare_value); 287 #endif // _LP64 288 } 289 290 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 291 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value); 292 } 293 294 295 #else // _LP64 || COMPILER2 296 297 298 // 32-bit compiler1 only 299 300 inline jint Atomic::add (jint add_value, volatile jint* dest) { 301 return (*os::atomic_add_func)(add_value, dest); 302 } 303 304 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 305 return (intptr_t)add((jint)add_value, (volatile jint*)dest); 306 } 307 308 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 309 return (void*)add((jint)add_value, (volatile jint*)dest); 310 } 311 312 313 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 314 return (*os::atomic_xchg_func)(exchange_value, dest); 315 } 316 317 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 318 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); 319 } 320 321 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 322 return (void*)xchg((jint)exchange_value, (volatile jint*)dest); 323 } 324 325 326 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { 327 return (*os::atomic_cmpxchg_func)(exchange_value, dest, compare_value); 328 } 329 330 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { 331 return (*os::atomic_cmpxchg_long_func)(exchange_value, dest, compare_value); 332 } 333 334 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { 335 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); 336 } 337 338 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 339 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); 340 } 341 342 #endif // _LP64 || COMPILER2 343 344 #endif // _GNU_SOURCE