| /* |
| * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_HPP |
| #define OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_HPP |
| |
| // Implementation of class atomic |
| |
| inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } |
| inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } |
| inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } |
| inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } |
| inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } |
| |
| inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } |
| inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } |
| inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } |
| inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } |
| inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } |
| |
| |
| template<size_t byte_size> |
| struct Atomic::PlatformAdd |
| : Atomic::FetchAndAdd<Atomic::PlatformAdd<byte_size> > |
| { |
| template<typename I, typename D> |
| D fetch_and_add(I add_value, D volatile* dest) const; |
| }; |
| |
| template<> |
| template<typename I, typename D> |
| inline D Atomic::PlatformAdd<4>::fetch_and_add(I add_value, D volatile* dest) const { |
| STATIC_ASSERT(4 == sizeof(I)); |
| STATIC_ASSERT(4 == sizeof(D)); |
| D old_value; |
| __asm__ volatile ( "lock xaddl %0,(%2)" |
| : "=r" (old_value) |
| : "0" (add_value), "r" (dest) |
| : "cc", "memory"); |
| return old_value; |
| } |
| |
| inline void Atomic::inc (volatile jint* dest) { |
| __asm__ volatile ( "lock addl $1,(%0)" : |
| : "r" (dest) : "cc", "memory"); |
| } |
| |
| inline void Atomic::inc_ptr(volatile void* dest) { |
| inc_ptr((volatile intptr_t*)dest); |
| } |
| |
| inline void Atomic::dec (volatile jint* dest) { |
| __asm__ volatile ( "lock subl $1,(%0)" : |
| : "r" (dest) : "cc", "memory"); |
| } |
| |
| inline void Atomic::dec_ptr(volatile void* dest) { |
| dec_ptr((volatile intptr_t*)dest); |
| } |
| |
| inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { |
| __asm__ volatile ( "xchgl (%2),%0" |
| : "=r" (exchange_value) |
| : "0" (exchange_value), "r" (dest) |
| : "memory"); |
| return exchange_value; |
| } |
| |
| inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { |
| return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest); |
| } |
| |
| template<> |
| template<typename T> |
| inline T Atomic::PlatformCmpxchg<1>::operator()(T exchange_value, |
| T volatile* dest, |
| T compare_value, |
| cmpxchg_memory_order /* order */) const { |
| STATIC_ASSERT(1 == sizeof(T)); |
| __asm__ volatile ("lock cmpxchgb %1,(%3)" |
| : "=a" (exchange_value) |
| : "q" (exchange_value), "a" (compare_value), "r" (dest) |
| : "cc", "memory"); |
| return exchange_value; |
| } |
| |
| template<> |
| template<typename T> |
| inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value, |
| T volatile* dest, |
| T compare_value, |
| cmpxchg_memory_order /* order */) const { |
| STATIC_ASSERT(4 == sizeof(T)); |
| __asm__ volatile ("lock cmpxchgl %1,(%3)" |
| : "=a" (exchange_value) |
| : "r" (exchange_value), "a" (compare_value), "r" (dest) |
| : "cc", "memory"); |
| return exchange_value; |
| } |
| |
| #ifdef AMD64 |
| inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } |
| inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } |
| |
| template<> |
| template<typename I, typename D> |
| inline D Atomic::PlatformAdd<8>::fetch_and_add(I add_value, D volatile* dest) const { |
| STATIC_ASSERT(8 == sizeof(I)); |
| STATIC_ASSERT(8 == sizeof(D)); |
| D old_value; |
| __asm__ __volatile__ ("lock xaddq %0,(%2)" |
| : "=r" (old_value) |
| : "0" (add_value), "r" (dest) |
| : "cc", "memory"); |
| return old_value; |
| } |
| |
| inline void Atomic::inc_ptr(volatile intptr_t* dest) { |
| __asm__ __volatile__ ("lock addq $1,(%0)" |
| : |
| : "r" (dest) |
| : "cc", "memory"); |
| } |
| |
| inline void Atomic::dec_ptr(volatile intptr_t* dest) { |
| __asm__ __volatile__ ("lock subq $1,(%0)" |
| : |
| : "r" (dest) |
| : "cc", "memory"); |
| } |
| |
| inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { |
| __asm__ __volatile__ ("xchgq (%2),%0" |
| : "=r" (exchange_value) |
| : "0" (exchange_value), "r" (dest) |
| : "memory"); |
| return exchange_value; |
| } |
| |
| template<> |
| template<typename T> |
| inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value, |
| T volatile* dest, |
| T compare_value, |
| cmpxchg_memory_order /* order */) const { |
| STATIC_ASSERT(8 == sizeof(T)); |
| __asm__ __volatile__ ("lock cmpxchgq %1,(%3)" |
| : "=a" (exchange_value) |
| : "r" (exchange_value), "a" (compare_value), "r" (dest) |
| : "cc", "memory"); |
| return exchange_value; |
| } |
| |
| inline jlong Atomic::load(const volatile jlong* src) { return *src; } |
| |
| #else // !AMD64 |
| |
| inline void Atomic::inc_ptr(volatile intptr_t* dest) { |
| inc((volatile jint*)dest); |
| } |
| |
| inline void Atomic::dec_ptr(volatile intptr_t* dest) { |
| dec((volatile jint*)dest); |
| } |
| |
| inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { |
| return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); |
| } |
| |
| extern "C" { |
| // defined in linux_x86.s |
| jlong _Atomic_cmpxchg_long(jlong, volatile jlong*, jlong); |
| void _Atomic_move_long(const volatile jlong* src, volatile jlong* dst); |
| } |
| |
| template<> |
| template<typename T> |
| inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value, |
| T volatile* dest, |
| T compare_value, |
| cmpxchg_memory_order order) const { |
| STATIC_ASSERT(8 == sizeof(T)); |
| return cmpxchg_using_helper<jlong>(_Atomic_cmpxchg_long, exchange_value, dest, compare_value); |
| } |
| |
| inline jlong Atomic::load(const volatile jlong* src) { |
| volatile jlong dest; |
| _Atomic_move_long(src, &dest); |
| return dest; |
| } |
| |
| inline void Atomic::store(jlong store_value, jlong* dest) { |
| _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest); |
| } |
| |
| inline void Atomic::store(jlong store_value, volatile jlong* dest) { |
| _Atomic_move_long((volatile jlong*)&store_value, dest); |
| } |
| |
| #endif // AMD64 |
| |
| #endif // OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_HPP |