1 /* 2 * Copyright (c) 1999, 2014, 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 "runtime/atomic.hpp" 29 #include "runtime/os.hpp" 30 31 // The following alternative implementations are needed because 32 // Windows 95 doesn't support (some of) the corresponding Windows NT 33 // calls. Furthermore, these versions allow inlining in the caller. 34 // (More precisely: The documentation for InterlockedExchange says 35 // it is supported for Windows 95. However, when single-stepping 36 // through the assembly code we cannot step into the routine and 37 // when looking at the routine address we see only garbage code. 38 // Better safe then sorry!). Was bug 7/31/98 (gri). 39 // 40 // Performance note: On uniprocessors, the 'lock' prefixes are not 41 // necessary (and expensive). We should generate separate cases if 42 // this becomes a performance problem. 43 44 #pragma warning(disable: 4035) // Disables warnings reporting missing return statement 45 46 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } 47 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } 48 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } 49 50 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } 51 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } 52 53 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } 54 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } 55 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } 56 57 58 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } 59 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } 60 61 // Adding a lock prefix to an instruction on MP machine 62 // VC++ doesn't like the lock prefix to be on a single line 63 // so we can't insert a label after the lock prefix. 64 // By emitting a lock prefix, we can define a label after it. 65 #define LOCK_IF_MP(mp) __asm cmp mp, 0 \ 66 __asm je L0 \ 67 __asm _emit 0xF0 \ 68 __asm L0: 69 70 #ifdef AMD64 71 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 72 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 73 74 inline jint Atomic::add (jint add_value, volatile jint* dest) { 75 return (jint)(*os::atomic_add_func)(add_value, dest); 76 } 77 78 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 79 return (intptr_t)(*os::atomic_add_ptr_func)(add_value, dest); 80 } 81 82 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 83 return (void*)(*os::atomic_add_ptr_func)(add_value, (volatile intptr_t*)dest); 84 } 85 86 inline void Atomic::inc (volatile jint* dest) { 87 (void)add (1, dest); 88 } 89 90 inline void Atomic::inc_ptr(volatile intptr_t* dest) { 91 (void)add_ptr(1, dest); 92 } 93 94 inline void Atomic::inc_ptr(volatile void* dest) { 95 (void)add_ptr(1, dest); 96 } 97 98 inline void Atomic::dec (volatile jint* dest) { 99 (void)add (-1, dest); 100 } 101 102 inline void Atomic::dec_ptr(volatile intptr_t* dest) { 103 (void)add_ptr(-1, dest); 104 } 105 106 inline void Atomic::dec_ptr(volatile void* dest) { 107 (void)add_ptr(-1, dest); 108 } 109 110 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 111 return (jint)(*os::atomic_xchg_func)(exchange_value, dest); 112 } 113 114 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 115 return (intptr_t)(os::atomic_xchg_ptr_func)(exchange_value, dest); 116 } 117 118 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 119 return (void *)(os::atomic_xchg_ptr_func)((intptr_t)exchange_value, (volatile intptr_t*)dest); 120 } 121 122 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { 123 return (*os::atomic_cmpxchg_func)(exchange_value, dest, compare_value); 124 } 125 126 #define VM_HAS_SPECIALIZED_CMPXCHG_BYTE 127 inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) { 128 return (*os::atomic_cmpxchg_byte_func)(exchange_value, dest, compare_value); 129 } 130 131 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { 132 return (*os::atomic_cmpxchg_long_func)(exchange_value, dest, compare_value); 133 } 134 135 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { 136 return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); 137 } 138 139 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 140 return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); 141 } 142 143 inline jlong Atomic::load(volatile jlong* src) { return *src; } 144 145 #else // !AMD64 146 147 inline jint Atomic::add (jint add_value, volatile jint* dest) { 148 int mp = os::is_MP(); 149 __asm { 150 mov edx, dest; 151 mov eax, add_value; 152 mov ecx, eax; 153 LOCK_IF_MP(mp) 154 xadd dword ptr [edx], eax; 155 add eax, ecx; 156 } 157 } 158 159 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 160 return (intptr_t)add((jint)add_value, (volatile jint*)dest); 161 } 162 163 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 164 return (void*)add((jint)add_value, (volatile jint*)dest); 165 } 166 167 inline void Atomic::inc (volatile jint* dest) { 168 // alternative for InterlockedIncrement 169 int mp = os::is_MP(); 170 __asm { 171 mov edx, dest; 172 LOCK_IF_MP(mp) 173 add dword ptr [edx], 1; 174 } 175 } 176 177 inline void Atomic::inc_ptr(volatile intptr_t* dest) { 178 inc((volatile jint*)dest); 179 } 180 181 inline void Atomic::inc_ptr(volatile void* dest) { 182 inc((volatile jint*)dest); 183 } 184 185 inline void Atomic::dec (volatile jint* dest) { 186 // alternative for InterlockedDecrement 187 int mp = os::is_MP(); 188 __asm { 189 mov edx, dest; 190 LOCK_IF_MP(mp) 191 sub dword ptr [edx], 1; 192 } 193 } 194 195 inline void Atomic::dec_ptr(volatile intptr_t* dest) { 196 dec((volatile jint*)dest); 197 } 198 199 inline void Atomic::dec_ptr(volatile void* dest) { 200 dec((volatile jint*)dest); 201 } 202 203 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 204 // alternative for InterlockedExchange 205 __asm { 206 mov eax, exchange_value; 207 mov ecx, dest; 208 xchg eax, dword ptr [ecx]; 209 } 210 } 211 212 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 213 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); 214 } 215 216 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 217 return (void*)xchg((jint)exchange_value, (volatile jint*)dest); 218 } 219 220 #define VM_HAS_SPECIALIZED_CMPXCHG_BYTE 221 inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) { 222 // alternative for InterlockedCompareExchange 223 int mp = os::is_MP(); 224 __asm { 225 mov edx, dest 226 mov cl, exchange_value 227 mov al, compare_value 228 LOCK_IF_MP(mp) 229 cmpxchg byte ptr [edx], cl 230 } 231 } 232 233 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { 234 // alternative for InterlockedCompareExchange 235 int mp = os::is_MP(); 236 __asm { 237 mov edx, dest 238 mov ecx, exchange_value 239 mov eax, compare_value 240 LOCK_IF_MP(mp) 241 cmpxchg dword ptr [edx], ecx 242 } 243 } 244 245 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { 246 int mp = os::is_MP(); 247 jint ex_lo = (jint)exchange_value; 248 jint ex_hi = *( ((jint*)&exchange_value) + 1 ); 249 jint cmp_lo = (jint)compare_value; 250 jint cmp_hi = *( ((jint*)&compare_value) + 1 ); 251 __asm { 252 push ebx 253 push edi 254 mov eax, cmp_lo 255 mov edx, cmp_hi 256 mov edi, dest 257 mov ebx, ex_lo 258 mov ecx, ex_hi 259 LOCK_IF_MP(mp) 260 cmpxchg8b qword ptr [edi] 261 pop edi 262 pop ebx 263 } 264 } 265 266 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { 267 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); 268 } 269 270 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 271 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); 272 } 273 274 inline jlong Atomic::load(volatile jlong* src) { 275 volatile jlong dest; 276 volatile jlong* pdest = &dest; 277 __asm { 278 mov eax, src 279 fild qword ptr [eax] 280 mov eax, pdest 281 fistp qword ptr [eax] 282 } 283 return dest; 284 } 285 286 inline void Atomic::store(jlong store_value, volatile jlong* dest) { 287 volatile jlong* src = &store_value; 288 __asm { 289 mov eax, src 290 fild qword ptr [eax] 291 mov eax, dest 292 fistp qword ptr [eax] 293 } 294 } 295 296 inline void Atomic::store(jlong store_value, jlong* dest) { 297 Atomic::store(store_value, (volatile jlong*)dest); 298 } 299 300 #endif // AMD64 301 302 #pragma warning(default: 4035) // Enables warnings reporting missing return statement 303 304 #endif // OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP