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97 lines
3.4 KiB
C
97 lines
3.4 KiB
C
/* Copyright (C) 2003-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <ia64intrin.h>
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#define __HAVE_64B_ATOMICS 1
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#define USE_ATOMIC_COMPILER_BUILTINS 0
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/* XXX Is this actually correct? */
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#define ATOMIC_EXCHANGE_USES_CAS 0
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#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
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(abort (), 0)
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#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
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(abort (), 0)
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#define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
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(!__sync_bool_compare_and_swap ((mem), (int) (long) (oldval), \
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(int) (long) (newval)))
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#define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
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(!__sync_bool_compare_and_swap ((mem), (long) (oldval), \
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(long) (newval)))
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#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
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(abort (), (__typeof (*mem)) 0)
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#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
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(abort (), (__typeof (*mem)) 0)
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#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
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__sync_val_compare_and_swap ((mem), (int) (long) (oldval), \
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(int) (long) (newval))
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#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
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__sync_val_compare_and_swap ((mem), (long) (oldval), (long) (newval))
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/* Atomically store newval and return the old value. */
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#define atomic_exchange_acq(mem, value) \
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__sync_lock_test_and_set (mem, value)
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#define atomic_exchange_rel(mem, value) \
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(__sync_synchronize (), __sync_lock_test_and_set (mem, value))
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#define atomic_exchange_and_add(mem, value) \
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__sync_fetch_and_add ((mem), (value))
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#define atomic_decrement_if_positive(mem) \
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({ __typeof (*mem) __oldval, __val; \
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__typeof (mem) __memp = (mem); \
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\
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__val = (*__memp); \
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do \
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{ \
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__oldval = __val; \
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if (__builtin_expect (__val <= 0, 0)) \
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break; \
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__val = atomic_compare_and_exchange_val_acq (__memp, __oldval - 1, \
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__oldval); \
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} \
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while (__builtin_expect (__val != __oldval, 0)); \
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__oldval; })
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#define atomic_bit_test_set(mem, bit) \
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({ __typeof (*mem) __oldval, __val; \
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__typeof (mem) __memp = (mem); \
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__typeof (*mem) __mask = ((__typeof (*mem)) 1 << (bit)); \
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\
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__val = (*__memp); \
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do \
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{ \
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__oldval = __val; \
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__val = atomic_compare_and_exchange_val_acq (__memp, \
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__oldval | __mask, \
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__oldval); \
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} \
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while (__builtin_expect (__val != __oldval, 0)); \
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__oldval & __mask; })
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#define atomic_full_barrier() __sync_synchronize ()
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