1 /* src/vm/jit/alpha/atomic.hpp - Alpha atomic instructions
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
26 #ifndef _MD_ATOMIC_HPP
27 #define _MD_ATOMIC_HPP
33 #include "threads/atomic.hpp"
38 * An atomic compare and swap for 32-bit integer values.
40 * @param p Pointer to memory address.
41 * @param oldval Old value to be expected.
42 * @param newval New value to be stored.
44 * @return value of the memory location before the store
46 inline uint32_t compare_and_swap(volatile uint32_t *p, uint32_t oldval, uint32_t newval)
51 __asm__ __volatile__ (
60 : "=&r" (result), "=m" (*p), "=&r" (temp)
61 : "r" (oldval), "r" (newval), "m" (*p));
68 * An atomic compare and swap for 64-bit integer values.
70 * @param p Pointer to memory address.
71 * @param oldval Old value to be expected.
72 * @param newval New value to be stored.
74 * @return value of the memory location before the store
76 inline uint64_t compare_and_swap(volatile uint64_t *p, uint64_t oldval, uint64_t newval)
81 __asm__ __volatile__ (
90 : "=&r" (result), "=m" (*p), "=&r" (temp)
91 : "r" (oldval), "r" (newval), "m" (*p));
100 inline void memory_barrier(void)
102 __asm__ __volatile__ ("mb" : : : "memory");
107 * A write memory barrier.
109 inline void write_memory_barrier(void)
111 __asm__ __volatile__ ("wmb" : : : "memory");
116 * An instruction barrier.
118 inline void instruction_barrier(void)
120 __asm__ __volatile__ ("mb" : : : "memory");
125 #endif // _MD_ATOMIC_HPP
129 * These are local overrides for various environment variables in Emacs.
130 * Please do not remove this and leave it at the end of the file, where
131 * Emacs will automagically detect them.
132 * ---------------------------------------------------------------------
135 * indent-tabs-mode: t
139 * vim:noexpandtab:sw=4:ts=4: