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 30inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } 31inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } 32inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } 33inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 34inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } 35inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } 36 37inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } 38inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } 39inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } 40inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 41inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } 42inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } 43 44inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); } 45inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); } 46inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); } 47 48inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); } 49inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); } 50inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); } 51 52inline jlong Atomic::load(const volatile jlong* src) { return *src; } 53 54template<size_t byte_size> 55struct Atomic::PlatformAdd 56 : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> > 57{ 58 template<typename I, typename D> 59 D add_and_fetch(I add_value, D volatile* dest) const; 60}; 61 62template<> 63template<typename I, typename D> 64inline D Atomic::PlatformAdd<4>::add_and_fetch(I add_value, D volatile* dest) const { 65 STATIC_ASSERT(4 == sizeof(I)); 66 STATIC_ASSERT(4 == sizeof(D)); 67 68 D rv; 69 __asm__ volatile( 70 "1: \n\t" 71 " ld [%2], %%o2\n\t" 72 " add %1, %%o2, %%o3\n\t" 73 " cas [%2], %%o2, %%o3\n\t" 74 " cmp %%o2, %%o3\n\t" 75 " bne 1b\n\t" 76 " nop\n\t" 77 " add %1, %%o2, %0\n\t" 78 : "=r" (rv) 79 : "r" (add_value), "r" (dest) 80 : "memory", "o2", "o3"); 81 return rv; 82} 83 84template<> 85template<typename I, typename D> 86inline D Atomic::PlatformAdd<8>::add_and_fetch(I add_value, D volatile* dest) const { 87 STATIC_ASSERT(8 == sizeof(I)); 88 STATIC_ASSERT(8 == sizeof(D)); 89 90 D rv; 91 __asm__ volatile( 92 "1: \n\t" 93 " ldx [%2], %%o2\n\t" 94 " add %1, %%o2, %%o3\n\t" 95 " casx [%2], %%o2, %%o3\n\t" 96 " cmp %%o2, %%o3\n\t" 97 " bne %%xcc, 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 return rv; 104} 105 106 107inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { 108 intptr_t rv = exchange_value; 109 __asm__ volatile( 110 " swap [%2],%1\n\t" 111 : "=r" (rv) 112 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest) 113 : "memory"); 114 return rv; 115} 116 117inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 118 intptr_t rv = exchange_value; 119 __asm__ volatile( 120 "1:\n\t" 121 " mov %1, %%o3\n\t" 122 " ldx [%2], %%o2\n\t" 123 " casx [%2], %%o2, %%o3\n\t" 124 " cmp %%o2, %%o3\n\t" 125 " bne %%xcc, 1b\n\t" 126 " nop\n\t" 127 " mov %%o2, %0\n\t" 128 : "=r" (rv) 129 : "r" (exchange_value), "r" (dest) 130 : "memory", "o2", "o3"); 131 return rv; 132} 133 134inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { 135 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest); 136} 137 138// No direct support for cmpxchg of bytes; emulate using int. 139template<> 140struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {}; 141 142template<> 143template<typename T> 144inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value, 145 T volatile* dest, 146 T compare_value, 147 cmpxchg_memory_order order) const { 148 STATIC_ASSERT(4 == sizeof(T)); 149 T rv; 150 __asm__ volatile( 151 " cas [%2], %3, %0" 152 : "=r" (rv) 153 : "0" (exchange_value), "r" (dest), "r" (compare_value) 154 : "memory"); 155 return rv; 156} 157 158template<> 159template<typename T> 160inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value, 161 T volatile* dest, 162 T compare_value, 163 cmpxchg_memory_order order) const { 164 STATIC_ASSERT(8 == sizeof(T)); 165 T rv; 166 __asm__ volatile( 167 " casx [%2], %3, %0" 168 : "=r" (rv) 169 : "0" (exchange_value), "r" (dest), "r" (compare_value) 170 : "memory"); 171 return rv; 172} 173 174#endif // OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP 175