--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/os_cpu/linux_aarch64/vm/atomic_linux_aarch64.hpp Sun Aug 21 20:56:37 2016 -0400
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, Red Hat Inc. 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_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP
+#define OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP
+
+#include "vm_version_aarch64.hpp"
+
+// Implementation of class atomic
+
+#define FULL_MEM_BARRIER __sync_synchronize()
+#define READ_MEM_BARRIER __atomic_thread_fence(__ATOMIC_ACQUIRE);
+#define WRITE_MEM_BARRIER __atomic_thread_fence(__ATOMIC_RELEASE);
+
+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; }
+
+
+inline jint Atomic::add(jint add_value, volatile jint* dest)
+{
+ return __sync_add_and_fetch(dest, add_value);
+}
+
+inline void Atomic::inc(volatile jint* dest)
+{
+ add(1, dest);
+}
+
+inline void Atomic::inc_ptr(volatile void* dest)
+{
+ add_ptr(1, dest);
+}
+
+inline void Atomic::dec (volatile jint* dest)
+{
+ add(-1, dest);
+}
+
+inline void Atomic::dec_ptr(volatile void* dest)
+{
+ add_ptr(-1, dest);
+}
+
+inline jint Atomic::xchg (jint exchange_value, volatile jint* dest)
+{
+ jint res = __sync_lock_test_and_set (dest, exchange_value);
+ FULL_MEM_BARRIER;
+ return res;
+}
+
+inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest)
+{
+ return (void *) xchg_ptr((intptr_t) exchange_value,
+ (volatile intptr_t*) dest);
+}
+
+template <typename T> T generic_cmpxchg(T exchange_value, volatile T* dest,
+ T compare_value, cmpxchg_memory_order order)
+{
+ if (order == memory_order_relaxed) {
+ T value = compare_value;
+ __atomic_compare_exchange(dest, &value, &exchange_value, /*weak*/false,
+ __ATOMIC_RELAXED, __ATOMIC_RELAXED);
+ return value;
+ } else {
+ return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
+ }
+}
+
+#define VM_HAS_SPECIALIZED_CMPXCHG_BYTE
+inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value, cmpxchg_memory_order order)
+{
+ return generic_cmpxchg(exchange_value, dest, compare_value, order);
+}
+
+inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value, cmpxchg_memory_order order)
+{
+ return generic_cmpxchg(exchange_value, dest, compare_value, order);
+}
+
+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; }
+
+inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest)
+{
+ return __sync_add_and_fetch(dest, add_value);
+}
+
+inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest)
+{
+ return (void *) add_ptr(add_value, (volatile intptr_t *) dest);
+}
+
+inline void Atomic::inc_ptr(volatile intptr_t* dest)
+{
+ add_ptr(1, dest);
+}
+
+inline void Atomic::dec_ptr(volatile intptr_t* dest)
+{
+ add_ptr(-1, dest);
+}
+
+inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest)
+{
+ intptr_t res = __sync_lock_test_and_set (dest, exchange_value);
+ FULL_MEM_BARRIER;
+ return res;
+}
+
+inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value, cmpxchg_memory_order order)
+{
+ return generic_cmpxchg(exchange_value, dest, compare_value, order);
+}
+
+inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order)
+{
+ return generic_cmpxchg(exchange_value, dest, compare_value, order);
+}
+
+inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order)
+{
+ return (void *) cmpxchg_ptr((intptr_t) exchange_value,
+ (volatile intptr_t*) dest,
+ (intptr_t) compare_value,
+ order);
+}
+
+inline jlong Atomic::load(volatile jlong* src) { return *src; }
+
+#endif // OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP