/* * 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_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP #define OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_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 (jlong store_value, jlong* 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 (jlong store_value, volatile jlong* 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 void Atomic::inc (volatile jint* dest) { (void)add (1, dest); } inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); } inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); } inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); } inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); } inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); } inline jlong Atomic::load(const volatile jlong* src) { return *src; } template struct Atomic::PlatformAdd : Atomic::AddAndFetch > { template D add_and_fetch(I add_value, D volatile* dest) const; }; template<> template inline D Atomic::PlatformAdd<4>::add_and_fetch(I add_value, D volatile* dest) const { STATIC_ASSERT(4 == sizeof(I)); STATIC_ASSERT(4 == sizeof(D)); D rv; __asm__ volatile( "1: \n\t" " ld [%2], %%o2\n\t" " add %1, %%o2, %%o3\n\t" " cas [%2], %%o2, %%o3\n\t" " cmp %%o2, %%o3\n\t" " bne 1b\n\t" " nop\n\t" " add %1, %%o2, %0\n\t" : "=r" (rv) : "r" (add_value), "r" (dest) : "memory", "o2", "o3"); return rv; } template<> template inline D Atomic::PlatformAdd<8>::add_and_fetch(I add_value, D volatile* dest) const { STATIC_ASSERT(8 == sizeof(I)); STATIC_ASSERT(8 == sizeof(D)); D rv; __asm__ volatile( "1: \n\t" " ldx [%2], %%o2\n\t" " add %1, %%o2, %%o3\n\t" " casx [%2], %%o2, %%o3\n\t" " cmp %%o2, %%o3\n\t" " bne %%xcc, 1b\n\t" " nop\n\t" " add %1, %%o2, %0\n\t" : "=r" (rv) : "r" (add_value), "r" (dest) : "memory", "o2", "o3"); return rv; } inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { intptr_t rv = exchange_value; __asm__ volatile( " swap [%2],%1\n\t" : "=r" (rv) : "0" (exchange_value) /* we use same register as for return value */, "r" (dest) : "memory"); return rv; } inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { intptr_t rv = exchange_value; __asm__ volatile( "1:\n\t" " mov %1, %%o3\n\t" " ldx [%2], %%o2\n\t" " casx [%2], %%o2, %%o3\n\t" " cmp %%o2, %%o3\n\t" " bne %%xcc, 1b\n\t" " nop\n\t" " mov %%o2, %0\n\t" : "=r" (rv) : "r" (exchange_value), "r" (dest) : "memory", "o2", "o3"); return rv; } inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest); } // No direct support for cmpxchg of bytes; emulate using int. template<> struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {}; template<> template 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)); T rv; __asm__ volatile( " cas [%2], %3, %0" : "=r" (rv) : "0" (exchange_value), "r" (dest), "r" (compare_value) : "memory"); return rv; } template<> template 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)); T rv; __asm__ volatile( " casx [%2], %3, %0" : "=r" (rv) : "0" (exchange_value), "r" (dest), "r" (compare_value) : "memory"); return rv; } #endif // OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP