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/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <ia64intrin.h>
#define __HAVE_64B_ATOMICS 1
#define USE_ATOMIC_COMPILER_BUILTINS 0
/* XXX Is this actually correct? */
#define ATOMIC_EXCHANGE_USES_CAS 0
#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
(abort (), 0)
#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
(abort (), 0)
#define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
(!__sync_bool_compare_and_swap ((mem), (int) (long) (oldval), \
(int) (long) (newval)))
#define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
(!__sync_bool_compare_and_swap ((mem), (long) (oldval), \
(long) (newval)))
#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
(abort (), (__typeof (*mem)) 0)
#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
(abort (), (__typeof (*mem)) 0)
#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
__sync_val_compare_and_swap ((mem), (int) (long) (oldval), \
(int) (long) (newval))
#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
__sync_val_compare_and_swap ((mem), (long) (oldval), (long) (newval))
/* Atomically store newval and return the old value. */
#define atomic_exchange_acq(mem, value) \
__sync_lock_test_and_set (mem, value)
#define atomic_exchange_rel(mem, value) \
(__sync_synchronize (), __sync_lock_test_and_set (mem, value))
#define atomic_exchange_and_add(mem, value) \
__sync_fetch_and_add ((mem), (value))
#define atomic_decrement_if_positive(mem) \
({ __typeof (*mem) __oldval, __val; \
__typeof (mem) __memp = (mem); \
\
__val = (*__memp); \
do \
{ \
__oldval = __val; \
if (__builtin_expect (__val <= 0, 0)) \
break; \
__val = atomic_compare_and_exchange_val_acq (__memp, __oldval - 1, \
__oldval); \
} \
while (__builtin_expect (__val != __oldval, 0)); \
__oldval; })
#define atomic_bit_test_set(mem, bit) \
({ __typeof (*mem) __oldval, __val; \
__typeof (mem) __memp = (mem); \
__typeof (*mem) __mask = ((__typeof (*mem)) 1 << (bit)); \
\
__val = (*__memp); \
do \
{ \
__oldval = __val; \
__val = atomic_compare_and_exchange_val_acq (__memp, \
__oldval | __mask, \
__oldval); \
} \
while (__builtin_expect (__val != __oldval, 0)); \
__oldval & __mask; })
#define atomic_full_barrier() __sync_synchronize ()
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