1 /* 2 * Copyright (c) 1999, 2013, 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_LINUX_X86_VM_ATOMIC_LINUX_X86_INLINE_HPP 26 #define OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_INLINE_HPP 27 28 #include "runtime/atomic.hpp" 29 #include "runtime/os.hpp" 30 #include "vm_version_x86.hpp" 31 32 // Implementation of class atomic 33 34 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } 35 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } 36 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } 37 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } 38 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } 39 40 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } 41 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } 42 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } 43 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } 44 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } 45 46 47 // Adding a lock prefix to an instruction on MP machine 48 #define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: " 49 50 inline jint Atomic::add (jint add_value, volatile jint* dest) { 51 jint addend = add_value; 52 int mp = os::is_MP(); 53 __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)" 54 : "=r" (addend) 55 : "0" (addend), "r" (dest), "r" (mp) 56 : "cc", "memory"); 57 return addend + add_value; 58 } 59 60 inline void Atomic::inc (volatile jint* dest) { 61 int mp = os::is_MP(); 62 __asm__ volatile (LOCK_IF_MP(%1) "addl $1,(%0)" : 63 : "r" (dest), "r" (mp) : "cc", "memory"); 64 } 65 66 inline void Atomic::inc_ptr(volatile void* dest) { 67 inc_ptr((volatile intptr_t*)dest); 68 } 69 70 inline void Atomic::dec (volatile jint* dest) { 71 int mp = os::is_MP(); 72 __asm__ volatile (LOCK_IF_MP(%1) "subl $1,(%0)" : 73 : "r" (dest), "r" (mp) : "cc", "memory"); 74 } 75 76 inline void Atomic::dec_ptr(volatile void* dest) { 77 dec_ptr((volatile intptr_t*)dest); 78 } 79 80 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 81 __asm__ volatile ( "xchgl (%2),%0" 82 : "=r" (exchange_value) 83 : "0" (exchange_value), "r" (dest) 84 : "memory"); 85 return exchange_value; 86 } 87 88 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 89 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest); 90 } 91 92 93 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { 94 int mp = os::is_MP(); 95 __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)" 96 : "=a" (exchange_value) 97 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp) 98 : "cc", "memory"); 99 return exchange_value; 100 } 101 102 #ifdef AMD64 103 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 104 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 105 106 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 107 intptr_t addend = add_value; 108 bool mp = os::is_MP(); 109 __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)" 110 : "=r" (addend) 111 : "0" (addend), "r" (dest), "r" (mp) 112 : "cc", "memory"); 113 return addend + add_value; 114 } 115 116 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 117 return (void*)add_ptr(add_value, (volatile intptr_t*)dest); 118 } 119 120 inline void Atomic::inc_ptr(volatile intptr_t* dest) { 121 bool mp = os::is_MP(); 122 __asm__ __volatile__ (LOCK_IF_MP(%1) "addq $1,(%0)" 123 : 124 : "r" (dest), "r" (mp) 125 : "cc", "memory"); 126 } 127 128 inline void Atomic::dec_ptr(volatile intptr_t* dest) { 129 bool mp = os::is_MP(); 130 __asm__ __volatile__ (LOCK_IF_MP(%1) "subq $1,(%0)" 131 : 132 : "r" (dest), "r" (mp) 133 : "cc", "memory"); 134 } 135 136 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 137 __asm__ __volatile__ ("xchgq (%2),%0" 138 : "=r" (exchange_value) 139 : "0" (exchange_value), "r" (dest) 140 : "memory"); 141 return exchange_value; 142 } 143 144 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { 145 bool mp = os::is_MP(); 146 __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)" 147 : "=a" (exchange_value) 148 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp) 149 : "cc", "memory"); 150 return exchange_value; 151 } 152 153 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { 154 return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); 155 } 156 157 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 158 return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); 159 } 160 161 inline jlong Atomic::load(volatile jlong* src) { return *src; } 162 163 #else // !AMD64 164 165 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 166 return (intptr_t)Atomic::add((jint)add_value, (volatile jint*)dest); 167 } 168 169 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 170 return (void*)Atomic::add((jint)add_value, (volatile jint*)dest); 171 } 172 173 174 inline void Atomic::inc_ptr(volatile intptr_t* dest) { 175 inc((volatile jint*)dest); 176 } 177 178 inline void Atomic::dec_ptr(volatile intptr_t* dest) { 179 dec((volatile jint*)dest); 180 } 181 182 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 183 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); 184 } 185 186 extern "C" { 187 // defined in linux_x86.s 188 jlong _Atomic_cmpxchg_long(jlong, volatile jlong*, jlong, bool); 189 void _Atomic_move_long(volatile jlong* src, volatile jlong* dst); 190 } 191 192 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { 193 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value, os::is_MP()); 194 } 195 196 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { 197 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); 198 } 199 200 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 201 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); 202 } 203 204 inline jlong Atomic::load(volatile jlong* src) { 205 volatile jlong dest; 206 _Atomic_move_long(src, &dest); 207 return dest; 208 } 209 210 inline void Atomic::store(jlong store_value, jlong* dest) { 211 _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest); 212 } 213 214 inline void Atomic::store(jlong store_value, volatile jlong* dest) { 215 _Atomic_move_long((volatile jlong*)&store_value, dest); 216 } 217 218 #endif // AMD64 219 220 #endif // OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_INLINE_HPP