1 /* src/vm/jit/s390/md-atomic.hpp - s390 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
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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"
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 static uint32_t Atomic_compare_and_swap_32(volatile uint32_t *p, uint32_t oldval, uint32_t newval)
47 __asm__ __volatile__ (
49 : "+d" (oldval), "=m" (*p)
50 : "a" (p), "d" (newval), "m" (*p)
58 * An atomic compare and swap for 64-bit integer values.
60 * @param p Pointer to memory address.
61 * @param oldval Old value to be expected.
62 * @param newval New value to be stored.
64 * @return value of the memory location before the store
66 inline static uint64_t Atomic_compare_and_swap_64(volatile uint64_t *p, uint64_t oldval, uint64_t newval)
68 return Atomic_generic_compare_and_swap_64(p, oldval, newval);
73 * An atomic compare and swap for pointer values.
75 * @param p Pointer to memory address.
76 * @param oldval Old value to be expected.
77 * @param newval New value to be stored.
79 * @return value of the memory location before the store
81 inline static void* Atomic_compare_and_swap_ptr(volatile void** p, void* oldval, void* newval)
83 return (void*) Atomic_compare_and_swap_32((volatile uint32_t*) p, (uint32_t) oldval, (uint32_t) newval);
90 inline static void Atomic_memory_barrier(void)
92 __asm__ __volatile__ ("bcr 15,0" : : : "memory" );
96 #define STORE_ORDER_BARRIER() Atomic_memory_barrier();
97 #define MEMORY_BARRIER_AFTER_ATOMIC() Atomic_memory_barrier();
99 #endif // _MD_ATOMIC_HPP
103 * These are local overrides for various environment variables in Emacs.
104 * Please do not remove this and leave it at the end of the file, where
105 * Emacs will automagically detect them.
106 * ---------------------------------------------------------------------
109 * indent-tabs-mode: t
113 * vim:noexpandtab:sw=4:ts=4: