1 // locks.h - Thread synchronization primitives. IA64 implementation.
3 /* Copyright (C) 2002 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
11 #ifndef __SYSDEP_LOCKS_H__
12 #define __SYSDEP_LOCKS_H__
14 typedef size_t obj_addr_t; /* Integer type big enough for object */
18 compare_and_swap(volatile obj_addr_t *addr,
23 __asm__ __volatile__("mov ar.ccv=%4 ;; cmpxchg8.acq %0=%1,%2,ar.ccv"
24 : "=r"(oldval), "=m"(*addr)
25 : "r"(new_val), "1"(*addr), "r"(old) : "memory");
26 return (oldval == old);
29 // The fact that *addr is volatile should cause the compiler to
30 // automatically generate an st8.rel.
32 release_set(volatile obj_addr_t *addr, obj_addr_t new_val)
34 __asm__ __volatile__(" " : : : "memory");
39 compare_and_swap_release(volatile obj_addr_t *addr,
44 __asm__ __volatile__("mov ar.ccv=%4 ;; cmpxchg8.rel %0=%1,%2,ar.ccv"
45 : "=r"(oldval), "=m"(*addr)
46 : "r"(new_val), "1"(*addr), "r"(old) : "memory");
47 return (oldval == old);