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.
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
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26 #ifndef _MD_ATOMIC_HPP
27 #define _MD_ATOMIC_HPP
33 #include "threads/atomic.hpp"
37 * An atomic compare and swap for 32-bit integer values.
39 * @param p Pointer to memory address.
40 * @param oldval Old value to be expected.
41 * @param newval New value to be stored.
43 * @return value of the memory location before the store
45 inline uint32_t Atomic::compare_and_swap(volatile uint32_t *p, uint32_t oldval, uint32_t newval)
50 __asm__ __volatile__ (
59 : "=&r" (result), "=m" (*p), "=&r" (temp)
60 : "r" (oldval), "r" (newval), "m" (*p));
67 * An atomic compare and swap for 64-bit integer values.
69 * @param p Pointer to memory address.
70 * @param oldval Old value to be expected.
71 * @param newval New value to be stored.
73 * @return value of the memory location before the store
75 inline uint64_t Atomic::compare_and_swap(volatile uint64_t *p, uint64_t oldval, uint64_t newval)
80 __asm__ __volatile__ (
89 : "=&r" (result), "=m" (*p), "=&r" (temp)
90 : "r" (oldval), "r" (newval), "m" (*p));
97 * An atomic compare and swap for pointer values.
99 * @param p Pointer to memory address.
100 * @param oldval Old value to be expected.
101 * @param newval New value to be stored.
103 * @return value of the memory location before the store
105 inline void* Atomic::compare_and_swap(volatile void** p, void* oldval, void* newval)
107 return (void*) compare_and_swap((volatile uint64_t*) p, (uint64_t) oldval, (uint64_t) newval);
114 inline void Atomic::memory_barrier(void)
116 __asm__ __volatile__ ("mb" : : : "memory");
121 * A write memory barrier.
123 inline void Atomic::write_memory_barrier(void)
125 __asm__ __volatile__ ("wmb" : : : "memory");
130 * An instruction barrier.
132 inline void Atomic::instruction_barrier(void)
134 __asm__ __volatile__ ("mb" : : : "memory");
137 #endif // _MD_ATOMIC_HPP
141 * These are local overrides for various environment variables in Emacs.
142 * Please do not remove this and leave it at the end of the file, where
143 * Emacs will automagically detect them.
144 * ---------------------------------------------------------------------
147 * indent-tabs-mode: t
151 * vim:noexpandtab:sw=4:ts=4: