author | erikj |
Tue, 12 Sep 2017 19:03:39 +0200 | |
changeset 47216 | 71c04702a3d5 |
parent 46993 | hotspot/src/os_cpu/solaris_sparc/vm/atomic_solaris_sparc.hpp@dd0f91c85ffc |
child 47552 | 8a3599d60996 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef OS_CPU_SOLARIS_SPARC_VM_ATOMIC_SOLARIS_SPARC_HPP |
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#define OS_CPU_SOLARIS_SPARC_VM_ATOMIC_SOLARIS_SPARC_HPP |
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// Implementation of class atomic |
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inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } |
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inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } |
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inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } |
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inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } |
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inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } |
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inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } |
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inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } |
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inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } |
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inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } |
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inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } |
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inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); } |
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inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); } |
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inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); } |
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inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); } |
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inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); } |
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inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); } |
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inline void Atomic::store(jlong store_value, jlong* dest) { *dest = store_value; } |
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inline void Atomic::store(jlong store_value, volatile jlong* dest) { *dest = store_value; } |
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inline jlong Atomic::load(const volatile jlong* src) { return *src; } |
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// This is the interface to the atomic instructions in solaris_sparc.il. |
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// It's very messy because we need to support v8 and these instructions |
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// are illegal there. When sparc v8 is dropped, we can drop out lots of |
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// this code. Also compiler2 does not support v8 so the conditional code |
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// omits the instruction set check. |
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extern "C" jint _Atomic_swap32(jint exchange_value, volatile jint* dest); |
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extern "C" intptr_t _Atomic_swap64(intptr_t exchange_value, volatile intptr_t* dest); |
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// Implement ADD using a CAS loop. |
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template<size_t byte_size> |
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struct Atomic::PlatformAdd VALUE_OBJ_CLASS_SPEC { |
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template<typename I, typename D> |
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inline D operator()(I add_value, D volatile* dest) const { |
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D old_value = *dest; |
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while (true) { |
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D new_value = old_value + add_value; |
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D result = cmpxchg(new_value, dest, old_value); |
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if (result == old_value) break; |
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old_value = result; |
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} |
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return old_value + add_value; |
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} |
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}; |
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inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { |
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return _Atomic_swap32(exchange_value, dest); |
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} |
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inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { |
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return _Atomic_swap64(exchange_value, dest); |
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} |
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inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { |
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return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest); |
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} |
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// No direct support for cmpxchg of bytes; emulate using int. |
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template<> |
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struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {}; |
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template<> |
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template<typename T> |
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inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value, |
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T volatile* dest, |
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T compare_value, |
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cmpxchg_memory_order order) const { |
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STATIC_ASSERT(4 == sizeof(T)); |
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T rv; |
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__asm__ volatile( |
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" cas [%2], %3, %0" |
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: "=r" (rv) |
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: "0" (exchange_value), "r" (dest), "r" (compare_value) |
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: "memory"); |
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return rv; |
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} |
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template<> |
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template<typename T> |
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inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value, |
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T volatile* dest, |
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T compare_value, |
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cmpxchg_memory_order order) const { |
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STATIC_ASSERT(8 == sizeof(T)); |
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T rv; |
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__asm__ volatile( |
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" casx [%2], %3, %0" |
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: "=r" (rv) |
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: "0" (exchange_value), "r" (dest), "r" (compare_value) |
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: "memory"); |
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return rv; |
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} |
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#endif // OS_CPU_SOLARIS_SPARC_VM_ATOMIC_SOLARIS_SPARC_HPP |