1 /* src/vm/jit/arm/atomic.hpp - ARM 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 /* TODO: improve this one! */
52 __asm__ __volatile__ (
59 "swpne %0,%1,[%2]\n\t"
62 : "=&r" (result), "=&r" (temp)
63 : "r" (p), "r" (newval), "r" (oldval)
72 * An atomic compare and swap for 64-bit integer values.
74 * @param p Pointer to memory address.
75 * @param oldval Old value to be expected.
76 * @param newval New value to be stored.
78 * @return value of the memory location before the store
80 inline uint64_t compare_and_swap(volatile uint64_t *p, uint64_t oldval, uint64_t newval)
82 return Atomic::generic_compare_and_swap(p, oldval, newval);
89 inline void memory_barrier(void)
91 __asm__ __volatile__ ("" : : : "memory");
96 * A write memory barrier.
98 inline void write_memory_barrier(void)
100 __asm__ __volatile__ ("" : : : "memory");
105 * An instruction barrier.
107 inline void instruction_barrier(void)
109 __asm__ __volatile__ ("" : : : "memory");
114 #endif // _MD_ATOMIC_HPP
118 * These are local overrides for various environment variables in Emacs.
119 * Please do not remove this and leave it at the end of the file, where
120 * Emacs will automagically detect them.
121 * ---------------------------------------------------------------------
124 * indent-tabs-mode: t
128 * vim:noexpandtab:sw=4:ts=4: