--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/os_cpu/bsd_x86/atomic_bsd_x86.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,223 @@
+/*
+ * 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_BSD_X86_VM_ATOMIC_BSD_X86_HPP
+#define OS_CPU_BSD_X86_VM_ATOMIC_BSD_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 bsd_x86.s
+ jlong _Atomic_cmpxchg_long(jlong, volatile jlong*, jlong, bool);
+ 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_BSD_X86_VM_ATOMIC_BSD_X86_HPP