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_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP 26 #define OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP 27 28 #include "runtime/os.hpp" 29 30 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } 31 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } 32 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } 33 34 35 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } 36 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } 37 38 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } 39 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } 40 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } 41 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } 42 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } 43 44 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); } 45 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); } 46 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); } 47 48 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); } 49 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); } 50 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); } 51 52 // For Sun Studio - implementation is in solaris_x86_[32/64].il. 53 // For gcc - implementation is just below. 54 55 extern "C" { 56 jint _Atomic_add(jint add_value, volatile jint* dest); 57 jint _Atomic_xchg(jint exchange_value, volatile jint* dest); 58 jbyte _Atomic_cmpxchg_byte(jbyte exchange_value, volatile jbyte* dest, 59 jbyte compare_value); 60 jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, 61 jint compare_value); 62 jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, 63 jlong compare_value); 64 } 65 66 inline jint Atomic::add (jint add_value, volatile jint* dest) { 67 return _Atomic_add(add_value, dest); 68 } 69 70 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 71 return _Atomic_xchg(exchange_value, dest); 72 } 73 74 #define VM_HAS_SPECIALIZED_CMPXCHG_BYTE 75 inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value, cmpxchg_memory_order order) { 76 return _Atomic_cmpxchg_byte(exchange_value, dest, compare_value); 77 } 78 79 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value, cmpxchg_memory_order order) { 80 return _Atomic_cmpxchg(exchange_value, dest, compare_value); 81 } 82 83 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value, cmpxchg_memory_order order) { 84 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value); 85 } 86 87 88 #ifdef AMD64 89 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 90 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 91 extern "C" jlong _Atomic_add_long(jlong add_value, volatile jlong* dest); 92 extern "C" jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest); 93 94 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 95 return (intptr_t)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest); 96 } 97 98 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 99 return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest); 100 } 101 102 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 103 return (intptr_t)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest); 104 } 105 106 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 107 return (void*)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest); 108 } 109 110 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order) { 111 return (intptr_t)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); 112 } 113 114 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) { 115 return (void*)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); 116 } 117 118 inline jlong Atomic::load(const volatile jlong* src) { return *src; } 119 120 #else // !AMD64 121 122 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 123 return (intptr_t)add((jint)add_value, (volatile jint*)dest); 124 } 125 126 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 127 return (void*)add((jint)add_value, (volatile jint*)dest); 128 } 129 130 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 131 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); 132 } 133 134 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 135 return (void*)xchg((jint)exchange_value, (volatile jint*)dest); 136 } 137 138 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order) { 139 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order); 140 } 141 142 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) { 143 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order); 144 } 145 146 extern "C" void _Atomic_move_long(const volatile jlong* src, volatile jlong* dst); 147 148 inline jlong Atomic::load(const volatile jlong* src) { 149 volatile jlong dest; 150 _Atomic_move_long(src, &dest); 151 return dest; 152 } 153 154 inline void Atomic::store(jlong store_value, jlong* dest) { 155 _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest); 156 } 157 158 inline void Atomic::store(jlong store_value, volatile jlong* dest) { 159 _Atomic_move_long((volatile jlong*)&store_value, dest); 160 } 161 162 #endif // AMD64 163 164 #ifdef _GNU_SOURCE 165 166 extern "C" { 167 inline jint _Atomic_add(jint add_value, volatile jint* dest) { 168 jint addend = add_value; 169 __asm__ volatile ("lock xaddl %0,(%2)" 170 : "=r" (addend) 171 : "0" (addend), "r" (dest) 172 : "cc", "memory"); 173 return addend + add_value; 174 } 175 176 #ifdef AMD64 177 inline jlong _Atomic_add_long(jlong add_value, volatile jlong* dest) { 178 intptr_t addend = add_value; 179 __asm__ __volatile__ ("lock xaddq %0,(%2)" 180 : "=r" (addend) 181 : "0" (addend), "r" (dest) 182 : "cc", "memory"); 183 return addend + add_value; 184 } 185 186 inline jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest) { 187 __asm__ __volatile__ ("xchgq (%2),%0" 188 : "=r" (exchange_value) 189 : "0" (exchange_value), "r" (dest) 190 : "memory"); 191 return exchange_value; 192 } 193 194 #endif // AMD64 195 196 inline jint _Atomic_xchg(jint exchange_value, volatile jint* dest) { 197 __asm__ __volatile__ ("xchgl (%2),%0" 198 : "=r" (exchange_value) 199 : "0" (exchange_value), "r" (dest) 200 : "memory"); 201 return exchange_value; 202 } 203 204 inline jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value) { 205 __asm__ volatile ("lock cmpxchgl %1,(%3)" 206 : "=a" (exchange_value) 207 : "r" (exchange_value), "a" (compare_value), "r" (dest) 208 : "cc", "memory"); 209 return exchange_value; 210 } 211 212 213 inline jbyte _Atomic_cmpxchg_byte(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) { 214 __asm__ volatile ("lock cmpxchgb %1,(%3)" 215 : "=a" (exchange_value) 216 : "q" (exchange_value), "a" (compare_value), "r" (dest) 217 : "cc", "memory"); 218 return exchange_value; 219 } 220 221 // This is the interface to the atomic instruction in solaris_i486.s. 222 jlong _Atomic_cmpxchg_long_gcc(jlong exchange_value, volatile jlong* dest, jlong compare_value); 223 224 inline jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value) { 225 #ifdef AMD64 226 __asm__ __volatile__ ("lock cmpxchgq %1,(%3)" 227 : "=a" (exchange_value) 228 : "r" (exchange_value), "a" (compare_value), "r" (dest) 229 : "cc", "memory"); 230 return exchange_value; 231 #else 232 return _Atomic_cmpxchg_long_gcc(exchange_value, dest, compare_value); 233 234 #if 0 235 // The code below does not work presumably because of the bug in gcc 236 // The error message says: 237 // can't find a register in class BREG while reloading asm 238 // However I want to save this code and later replace _Atomic_cmpxchg_long_gcc 239 // with such inline asm code: 240 241 volatile jlong_accessor evl, cvl, rv; 242 evl.long_value = exchange_value; 243 cvl.long_value = compare_value; 244 245 __asm__ volatile ( 246 "lock cmpxchg8b (%%edi)\n\t" 247 : "=a"(cvl.words[0]), "=d"(cvl.words[1]) 248 : "a"(cvl.words[0]), "d"(cvl.words[1]), 249 "b"(evl.words[0]), "c"(evl.words[1]), 250 "D"(dest) 251 : "cc", "memory"); 252 return cvl.long_value; 253 #endif // if 0 254 #endif // AMD64 255 } 256 } 257 258 #endif // _GNU_SOURCE 259 260 #endif // OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP