1 /* 2 * Copyright (c) 1999, 2017, 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_HPP 26 #define OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_HPP 27 28 #include "runtime/os.hpp" 29 30 // The following alternative implementations are needed because 31 // Windows 95 doesn't support (some of) the corresponding Windows NT 32 // calls. Furthermore, these versions allow inlining in the caller. 33 // (More precisely: The documentation for InterlockedExchange says 34 // it is supported for Windows 95. However, when single-stepping 35 // through the assembly code we cannot step into the routine and 36 // when looking at the routine address we see only garbage code. 37 // Better safe then sorry!). Was bug 7/31/98 (gri). 38 // 39 // Performance note: On uniprocessors, the 'lock' prefixes are not 40 // necessary (and expensive). We should generate separate cases if 41 // this becomes a performance problem. 42 43 #pragma warning(disable: 4035) // Disables warnings reporting missing return statement 44 45 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } 46 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } 47 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } 48 49 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } 50 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } 51 52 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } 53 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } 54 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } 55 56 57 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } 58 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } 59 60 #ifdef AMD64 61 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 62 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 63 64 inline jint Atomic::add (jint add_value, volatile jint* dest) { 65 return (jint)(*os::atomic_add_func)(add_value, dest); 66 } 67 68 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 69 return (intptr_t)(*os::atomic_add_ptr_func)(add_value, dest); 70 } 71 72 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 73 return (void*)(*os::atomic_add_ptr_func)(add_value, (volatile intptr_t*)dest); 74 } 75 76 inline void Atomic::inc (volatile jint* dest) { 77 (void)add (1, dest); 78 } 79 80 inline void Atomic::inc_ptr(volatile intptr_t* dest) { 81 (void)add_ptr(1, dest); 82 } 83 84 inline void Atomic::inc_ptr(volatile void* dest) { 85 (void)add_ptr(1, dest); 86 } 87 88 inline void Atomic::dec (volatile jint* dest) { 89 (void)add (-1, dest); 90 } 91 92 inline void Atomic::dec_ptr(volatile intptr_t* dest) { 93 (void)add_ptr(-1, dest); 94 } 95 96 inline void Atomic::dec_ptr(volatile void* dest) { 97 (void)add_ptr(-1, dest); 98 } 99 100 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 101 return (jint)(*os::atomic_xchg_func)(exchange_value, dest); 102 } 103 104 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 105 return (intptr_t)(os::atomic_xchg_ptr_func)(exchange_value, dest); 106 } 107 108 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 109 return (void *)(os::atomic_xchg_ptr_func)((intptr_t)exchange_value, (volatile intptr_t*)dest); 110 } 111 112 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value, cmpxchg_memory_order order) { 113 return (*os::atomic_cmpxchg_func)(exchange_value, dest, compare_value); 114 } 115 116 #define VM_HAS_SPECIALIZED_CMPXCHG_BYTE 117 inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value, cmpxchg_memory_order order) { 118 return (*os::atomic_cmpxchg_byte_func)(exchange_value, dest, compare_value); 119 } 120 121 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value, cmpxchg_memory_order order) { 122 return (*os::atomic_cmpxchg_long_func)(exchange_value, dest, compare_value); 123 } 124 125 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order) { 126 return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value, order); 127 } 128 129 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) { 130 return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value, order); 131 } 132 133 inline jlong Atomic::load(const volatile jlong* src) { return *src; } 134 135 #else // !AMD64 136 137 inline jint Atomic::add (jint add_value, volatile jint* dest) { 138 __asm { 139 mov edx, dest; 140 mov eax, add_value; 141 mov ecx, eax; 142 lock xadd dword ptr [edx], eax; 143 add eax, ecx; 144 } 145 } 146 147 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 148 return (intptr_t)add((jint)add_value, (volatile jint*)dest); 149 } 150 151 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 152 return (void*)add((jint)add_value, (volatile jint*)dest); 153 } 154 155 inline void Atomic::inc (volatile jint* dest) { 156 // alternative for InterlockedIncrement 157 __asm { 158 mov edx, dest; 159 lock add dword ptr [edx], 1; 160 } 161 } 162 163 inline void Atomic::inc_ptr(volatile intptr_t* dest) { 164 inc((volatile jint*)dest); 165 } 166 167 inline void Atomic::inc_ptr(volatile void* dest) { 168 inc((volatile jint*)dest); 169 } 170 171 inline void Atomic::dec (volatile jint* dest) { 172 // alternative for InterlockedDecrement 173 __asm { 174 mov edx, dest; 175 lock sub dword ptr [edx], 1; 176 } 177 } 178 179 inline void Atomic::dec_ptr(volatile intptr_t* dest) { 180 dec((volatile jint*)dest); 181 } 182 183 inline void Atomic::dec_ptr(volatile void* dest) { 184 dec((volatile jint*)dest); 185 } 186 187 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 188 // alternative for InterlockedExchange 189 __asm { 190 mov eax, exchange_value; 191 mov ecx, dest; 192 xchg eax, dword ptr [ecx]; 193 } 194 } 195 196 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 197 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); 198 } 199 200 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 201 return (void*)xchg((jint)exchange_value, (volatile jint*)dest); 202 } 203 204 #define VM_HAS_SPECIALIZED_CMPXCHG_BYTE 205 inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value, cmpxchg_memory_order order) { 206 // alternative for InterlockedCompareExchange 207 __asm { 208 mov edx, dest 209 mov cl, exchange_value 210 mov al, compare_value 211 lock cmpxchg byte ptr [edx], cl 212 } 213 } 214 215 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value, cmpxchg_memory_order order) { 216 // alternative for InterlockedCompareExchange 217 __asm { 218 mov edx, dest 219 mov ecx, exchange_value 220 mov eax, compare_value 221 lock cmpxchg dword ptr [edx], ecx 222 } 223 } 224 225 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value, cmpxchg_memory_order order) { 226 jint ex_lo = (jint)exchange_value; 227 jint ex_hi = *( ((jint*)&exchange_value) + 1 ); 228 jint cmp_lo = (jint)compare_value; 229 jint cmp_hi = *( ((jint*)&compare_value) + 1 ); 230 __asm { 231 push ebx 232 push edi 233 mov eax, cmp_lo 234 mov edx, cmp_hi 235 mov edi, dest 236 mov ebx, ex_lo 237 mov ecx, ex_hi 238 lock cmpxchg8b qword ptr [edi] 239 pop edi 240 pop ebx 241 } 242 } 243 244 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order) { 245 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order); 246 } 247 248 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) { 249 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order); 250 } 251 252 inline jlong Atomic::load(const volatile jlong* src) { 253 volatile jlong dest; 254 volatile jlong* pdest = &dest; 255 __asm { 256 mov eax, src 257 fild qword ptr [eax] 258 mov eax, pdest 259 fistp qword ptr [eax] 260 } 261 return dest; 262 } 263 264 inline void Atomic::store(jlong store_value, volatile jlong* dest) { 265 volatile jlong* src = &store_value; 266 __asm { 267 mov eax, src 268 fild qword ptr [eax] 269 mov eax, dest 270 fistp qword ptr [eax] 271 } 272 } 273 274 inline void Atomic::store(jlong store_value, jlong* dest) { 275 Atomic::store(store_value, (volatile jlong*)dest); 276 } 277 278 #endif // AMD64 279 280 #pragma warning(default: 4035) // Enables warnings reporting missing return statement 281 282 #endif // OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_HPP