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_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP 26 #define OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP 27 28 // Implementation of class atomic 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 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 34 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } 35 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } 36 37 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } 38 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } 39 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } 40 inline void Atomic::store (jlong store_value, volatile jlong* 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 jlong Atomic::load(const volatile jlong* src) { return *src; } 45 46 template<size_t byte_size> 47 struct Atomic::PlatformAdd 48 : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> > 49 { 50 template<typename I, typename D> 51 D add_and_fetch(I add_value, D volatile* dest) const; 52 }; 53 54 template<> 55 template<typename I, typename D> 56 inline D Atomic::PlatformAdd<4>::add_and_fetch(I add_value, D volatile* dest) const { 57 STATIC_ASSERT(4 == sizeof(I)); 58 STATIC_ASSERT(4 == sizeof(D)); 59 60 D rv; 61 __asm__ volatile( 62 "1: \n\t" 63 " ld [%2], %%o2\n\t" 64 " add %1, %%o2, %%o3\n\t" 65 " cas [%2], %%o2, %%o3\n\t" 66 " cmp %%o2, %%o3\n\t" 67 " bne 1b\n\t" 68 " nop\n\t" 69 " add %1, %%o2, %0\n\t" 70 : "=r" (rv) 71 : "r" (add_value), "r" (dest) 72 : "memory", "o2", "o3"); 73 return rv; 74 } 75 76 template<> 77 template<typename I, typename D> 78 inline D Atomic::PlatformAdd<8>::add_and_fetch(I add_value, D volatile* dest) const { 79 STATIC_ASSERT(8 == sizeof(I)); 80 STATIC_ASSERT(8 == sizeof(D)); 81 82 D rv; 83 __asm__ volatile( 84 "1: \n\t" 85 " ldx [%2], %%o2\n\t" 86 " add %1, %%o2, %%o3\n\t" 87 " casx [%2], %%o2, %%o3\n\t" 88 " cmp %%o2, %%o3\n\t" 89 " bne %%xcc, 1b\n\t" 90 " nop\n\t" 91 " add %1, %%o2, %0\n\t" 92 : "=r" (rv) 93 : "r" (add_value), "r" (dest) 94 : "memory", "o2", "o3"); 95 return rv; 96 } 97 98 template<> 99 template<typename T> 100 inline T Atomic::PlatformXchg<4>::operator()(T exchange_value, 101 T volatile* dest) const { 102 STATIC_ASSERT(4 == sizeof(T)); 103 T rv = exchange_value; 104 __asm__ volatile( 105 " swap [%2],%1\n\t" 106 : "=r" (rv) 107 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest) 108 : "memory"); 109 return rv; 110 } 111 112 template<> 113 template<typename T> 114 inline T Atomic::PlatformXchg<8>::operator()(T exchange_value, 115 T volatile* dest) const { 116 STATIC_ASSERT(8 == sizeof(T)); 117 T rv = exchange_value; 118 __asm__ volatile( 119 "1:\n\t" 120 " mov %1, %%o3\n\t" 121 " ldx [%2], %%o2\n\t" 122 " casx [%2], %%o2, %%o3\n\t" 123 " cmp %%o2, %%o3\n\t" 124 " bne %%xcc, 1b\n\t" 125 " nop\n\t" 126 " mov %%o2, %0\n\t" 127 : "=r" (rv) 128 : "r" (exchange_value), "r" (dest) 129 : "memory", "o2", "o3"); 130 return rv; 131 } 132 133 // No direct support for cmpxchg of bytes; emulate using int. 134 template<> 135 struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {}; 136 137 template<> 138 template<typename T> 139 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value, 140 T volatile* dest, 141 T compare_value, 142 cmpxchg_memory_order order) const { 143 STATIC_ASSERT(4 == sizeof(T)); 144 T rv; 145 __asm__ volatile( 146 " cas [%2], %3, %0" 147 : "=r" (rv) 148 : "0" (exchange_value), "r" (dest), "r" (compare_value) 149 : "memory"); 150 return rv; 151 } 152 153 template<> 154 template<typename T> 155 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value, 156 T volatile* dest, 157 T compare_value, 158 cmpxchg_memory_order order) const { 159 STATIC_ASSERT(8 == sizeof(T)); 160 T rv; 161 __asm__ volatile( 162 " casx [%2], %3, %0" 163 : "=r" (rv) 164 : "0" (exchange_value), "r" (dest), "r" (compare_value) 165 : "memory"); 166 return rv; 167 } 168 169 #endif // OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP