--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/os_cpu/bsd_x86/vm/atomic_bsd_x86.hpp Sun Aug 21 20:56:37 2016 -0400
@@ -0,0 +1,227 @@
+/*
+ * Copyright (c) 1999, 2016, 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
+
+#include "runtime/os.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; }
+
+
+// Adding a lock prefix to an instruction on MP machine
+#define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: "
+
+inline jint Atomic::add (jint add_value, volatile jint* dest) {
+ jint addend = add_value;
+ int mp = os::is_MP();
+ __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)"
+ : "=r" (addend)
+ : "0" (addend), "r" (dest), "r" (mp)
+ : "cc", "memory");
+ return addend + add_value;
+}
+
+inline void Atomic::inc (volatile jint* dest) {
+ int mp = os::is_MP();
+ __asm__ volatile (LOCK_IF_MP(%1) "addl $1,(%0)" :
+ : "r" (dest), "r" (mp) : "cc", "memory");
+}
+
+inline void Atomic::inc_ptr(volatile void* dest) {
+ inc_ptr((volatile intptr_t*)dest);
+}
+
+inline void Atomic::dec (volatile jint* dest) {
+ int mp = os::is_MP();
+ __asm__ volatile (LOCK_IF_MP(%1) "subl $1,(%0)" :
+ : "r" (dest), "r" (mp) : "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);
+}
+
+#define VM_HAS_SPECIALIZED_CMPXCHG_BYTE
+inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value, cmpxchg_memory_order order) {
+ int mp = os::is_MP();
+ __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgb %1,(%3)"
+ : "=a" (exchange_value)
+ : "q" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
+ : "cc", "memory");
+ return exchange_value;
+}
+
+inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value, cmpxchg_memory_order order) {
+ int mp = os::is_MP();
+ __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)"
+ : "=a" (exchange_value)
+ : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
+ : "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; }
+
+inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
+ intptr_t addend = add_value;
+ bool mp = os::is_MP();
+ __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)"
+ : "=r" (addend)
+ : "0" (addend), "r" (dest), "r" (mp)
+ : "cc", "memory");
+ return addend + 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) {
+ bool mp = os::is_MP();
+ __asm__ __volatile__ (LOCK_IF_MP(%1) "addq $1,(%0)"
+ :
+ : "r" (dest), "r" (mp)
+ : "cc", "memory");
+}
+
+inline void Atomic::dec_ptr(volatile intptr_t* dest) {
+ bool mp = os::is_MP();
+ __asm__ __volatile__ (LOCK_IF_MP(%1) "subq $1,(%0)"
+ :
+ : "r" (dest), "r" (mp)
+ : "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;
+}
+
+inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value, cmpxchg_memory_order order) {
+ bool mp = os::is_MP();
+ __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)"
+ : "=a" (exchange_value)
+ : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
+ : "cc", "memory");
+ return exchange_value;
+}
+
+inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order) {
+ return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value, order);
+}
+
+inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) {
+ return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value, order);
+}
+
+inline jlong Atomic::load(volatile jlong* src) { return *src; }
+
+#else // !AMD64
+
+inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
+ return (intptr_t)Atomic::add((jint)add_value, (volatile jint*)dest);
+}
+
+inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
+ return (void*)Atomic::add((jint)add_value, (volatile jint*)dest);
+}
+
+
+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(volatile jlong* src, volatile jlong* dst);
+}
+
+inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value, cmpxchg_memory_order order) {
+ return _Atomic_cmpxchg_long(exchange_value, dest, compare_value, os::is_MP());
+}
+
+inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value, cmpxchg_memory_order order) {
+ return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order);
+}
+
+inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) {
+ return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order);
+}
+
+inline jlong Atomic::load(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