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