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_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP 26 #define OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP 27 28 #include "runtime/atomic.hpp" 29 #include "runtime/os.hpp" 30 #include "vm_version_sparc.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 (jlong store_value, jlong* dest) { *dest = store_value; } 38 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } 39 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } 40 41 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } 42 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } 43 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } 44 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 45 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } 46 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } 47 48 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); } 49 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); } 50 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); } 51 52 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); } 53 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); } 54 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); } 55 56 inline jlong Atomic::load(volatile jlong* src) { return *src; } 57 58 inline jint Atomic::add (jint add_value, volatile jint* dest) { 59 intptr_t rv; 60 __asm__ volatile( 61 "1: \n\t" 62 " ld [%2], %%o2\n\t" 63 " add %1, %%o2, %%o3\n\t" 64 " cas [%2], %%o2, %%o3\n\t" 65 " cmp %%o2, %%o3\n\t" 66 " bne 1b\n\t" 67 " nop\n\t" 68 " add %1, %%o2, %0\n\t" 69 : "=r" (rv) 70 : "r" (add_value), "r" (dest) 71 : "memory", "o2", "o3"); 72 return rv; 73 } 74 75 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 76 intptr_t rv; 77 #ifdef _LP64 78 __asm__ volatile( 79 "1: \n\t" 80 " ldx [%2], %%o2\n\t" 81 " add %0, %%o2, %%o3\n\t" 82 " casx [%2], %%o2, %%o3\n\t" 83 " cmp %%o2, %%o3\n\t" 84 " bne %%xcc, 1b\n\t" 85 " nop\n\t" 86 " add %0, %%o2, %0\n\t" 87 : "=r" (rv) 88 : "r" (add_value), "r" (dest) 89 : "memory", "o2", "o3"); 90 #else 91 __asm__ volatile( 92 "1: \n\t" 93 " ld [%2], %%o2\n\t" 94 " add %1, %%o2, %%o3\n\t" 95 " cas [%2], %%o2, %%o3\n\t" 96 " cmp %%o2, %%o3\n\t" 97 " bne 1b\n\t" 98 " nop\n\t" 99 " add %1, %%o2, %0\n\t" 100 : "=r" (rv) 101 : "r" (add_value), "r" (dest) 102 : "memory", "o2", "o3"); 103 #endif // _LP64 104 return rv; 105 } 106 107 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { 108 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest); 109 } 110 111 112 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 113 intptr_t rv = exchange_value; 114 __asm__ volatile( 115 " swap [%2],%1\n\t" 116 : "=r" (rv) 117 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest) 118 : "memory"); 119 return rv; 120 } 121 122 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 123 intptr_t rv = exchange_value; 124 #ifdef _LP64 125 __asm__ volatile( 126 "1:\n\t" 127 " mov %1, %%o3\n\t" 128 " ldx [%2], %%o2\n\t" 129 " casx [%2], %%o2, %%o3\n\t" 130 " cmp %%o2, %%o3\n\t" 131 " bne %%xcc, 1b\n\t" 132 " nop\n\t" 133 " mov %%o2, %0\n\t" 134 : "=r" (rv) 135 : "r" (exchange_value), "r" (dest) 136 : "memory", "o2", "o3"); 137 #else 138 __asm__ volatile( 139 "swap [%2],%1\n\t" 140 : "=r" (rv) 141 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest) 142 : "memory"); 143 #endif // _LP64 144 return rv; 145 } 146 147 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 148 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest); 149 } 150 151 152 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { 153 jint rv; 154 __asm__ volatile( 155 " cas [%2], %3, %0" 156 : "=r" (rv) 157 : "0" (exchange_value), "r" (dest), "r" (compare_value) 158 : "memory"); 159 return rv; 160 } 161 162 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { 163 #ifdef _LP64 164 jlong rv; 165 __asm__ volatile( 166 " casx [%2], %3, %0" 167 : "=r" (rv) 168 : "0" (exchange_value), "r" (dest), "r" (compare_value) 169 : "memory"); 170 return rv; 171 #else 172 assert(VM_Version::v9_instructions_work(), "cas only supported on v9"); 173 volatile jlong_accessor evl, cvl, rv; 174 evl.long_value = exchange_value; 175 cvl.long_value = compare_value; 176 177 __asm__ volatile( 178 " sllx %2, 32, %2\n\t" 179 " srl %3, 0, %3\n\t" 180 " or %2, %3, %2\n\t" 181 " sllx %5, 32, %5\n\t" 182 " srl %6, 0, %6\n\t" 183 " or %5, %6, %5\n\t" 184 " casx [%4], %5, %2\n\t" 185 " srl %2, 0, %1\n\t" 186 " srlx %2, 32, %0\n\t" 187 : "=r" (rv.words[0]), "=r" (rv.words[1]) 188 : "r" (evl.words[0]), "r" (evl.words[1]), "r" (dest), "r" (cvl.words[0]), "r" (cvl.words[1]) 189 : "memory"); 190 191 return rv.long_value; 192 #endif 193 } 194 195 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { 196 intptr_t rv; 197 #ifdef _LP64 198 __asm__ volatile( 199 " casx [%2], %3, %0" 200 : "=r" (rv) 201 : "0" (exchange_value), "r" (dest), "r" (compare_value) 202 : "memory"); 203 #else 204 __asm__ volatile( 205 " cas [%2], %3, %0" 206 : "=r" (rv) 207 : "0" (exchange_value), "r" (dest), "r" (compare_value) 208 : "memory"); 209 #endif // _LP64 210 return rv; 211 } 212 213 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 214 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value); 215 } 216 217 #endif // OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP