| 1 | // locks.h - Thread synchronization primitives. IA64 implementation.
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| 2 |
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| 3 | /* Copyright (C) 2002 Free Software Foundation
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| 4 |
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| 5 | This file is part of libgcj.
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| 6 |
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| 7 | This software is copyrighted work licensed under the terms of the
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| 8 | Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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| 9 | details. */
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| 10 |
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| 11 | #ifndef __SYSDEP_LOCKS_H__
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| 12 | #define __SYSDEP_LOCKS_H__
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| 13 |
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| 14 | typedef size_t obj_addr_t; /* Integer type big enough for object */
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| 15 | /* address. */
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| 16 |
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| 17 | inline static bool
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| 18 | compare_and_swap(volatile obj_addr_t *addr,
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| 19 | obj_addr_t old,
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| 20 | obj_addr_t new_val)
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| 21 | {
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| 22 | unsigned long oldval;
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| 23 | __asm__ __volatile__("mov ar.ccv=%4 ;; cmpxchg8.acq %0=%1,%2,ar.ccv"
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| 24 | : "=r"(oldval), "=m"(*addr)
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| 25 | : "r"(new_val), "1"(*addr), "r"(old) : "memory");
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| 26 | return (oldval == old);
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| 27 | }
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| 28 |
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| 29 | // The fact that *addr is volatile should cause the compiler to
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| 30 | // automatically generate an st8.rel.
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| 31 | inline static void
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| 32 | release_set(volatile obj_addr_t *addr, obj_addr_t new_val)
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| 33 | {
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| 34 | __asm__ __volatile__(" " : : : "memory");
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| 35 | *(addr) = new_val;
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| 36 | }
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| 37 |
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| 38 | inline static bool
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| 39 | compare_and_swap_release(volatile obj_addr_t *addr,
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| 40 | obj_addr_t old,
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| 41 | obj_addr_t new_val)
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| 42 | {
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| 43 | unsigned long oldval;
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| 44 | __asm__ __volatile__("mov ar.ccv=%4 ;; cmpxchg8.rel %0=%1,%2,ar.ccv"
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| 45 | : "=r"(oldval), "=m"(*addr)
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| 46 | : "r"(new_val), "1"(*addr), "r"(old) : "memory");
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| 47 | return (oldval == old);
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| 48 | }
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| 49 |
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| 50 | #endif
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