1 /* src/vm/jit/mips/atomic.hpp - MIPS 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__ (
61 : "=&r" (result), "=&r" (temp), "=m" (*p)
62 : "r" (oldval), "r" (newval), "m" (*p)
70 * An atomic compare and swap for 64-bit integer values.
72 * @param p Pointer to memory address.
73 * @param oldval Old value to be expected.
74 * @param newval New value to be stored.
76 * @return value of the memory location before the store
78 inline uint64_t Atomic::compare_and_swap(volatile uint64_t *p, uint64_t oldval, uint64_t newval)
80 #if SIZEOF_VOID_P == 8
84 __asm__ __volatile__ (
95 : "=&r" (result), "=&r" (temp), "=m" (*p)
96 : "r" (oldval), "r" (newval), "m" (*p)
101 return generic_compare_and_swap(p, oldval, newval);
107 * An atomic compare and swap for pointer values.
109 * @param p Pointer to memory address.
110 * @param oldval Old value to be expected.
111 * @param newval New value to be stored.
113 * @return value of the memory location before the store
115 inline void* Atomic::compare_and_swap(volatile void** p, void* oldval, void* newval)
117 #if SIZEOF_VOID_P == 8
118 return (void*) compare_and_swap((volatile uint64_t*) p, (uint64_t) oldval, (uint64_t) newval);
120 return (void*) compare_and_swap((volatile uint32_t*) p, (uint32_t) oldval, (uint32_t) newval);
128 inline void Atomic::memory_barrier(void)
130 __asm__ __volatile__ ("" : : : "memory");
135 * A write memory barrier.
137 inline void Atomic::write_memory_barrier(void)
139 __asm__ __volatile__ ("" : : : "memory");
144 * An instruction barrier.
146 inline void Atomic::instruction_barrier(void)
148 __asm__ __volatile__ ("" : : : "memory");
151 #endif // _MD_ATOMIC_HPP
155 * These are local overrides for various environment variables in Emacs.
156 * Please do not remove this and leave it at the end of the file, where
157 * Emacs will automagically detect them.
158 * ---------------------------------------------------------------------
161 * indent-tabs-mode: t
165 * vim:noexpandtab:sw=4:ts=4: