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/* Atomic operations.
Copyright (C) 2022-2025 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/>. */
#ifndef _LINUX_LOONGARCH_BITS_ATOMIC_H
#define _LINUX_LOONGARCH_BITS_ATOMIC_H 1
#define atomic_full_barrier() __sync_synchronize ()
#define __HAVE_64B_ATOMICS (__loongarch_grlen >= 64)
#define USE_ATOMIC_COMPILER_BUILTINS 1
#define ATOMIC_EXCHANGE_USES_CAS 0
/* Compare and exchange.
For all "bool" routines, we return FALSE if exchange successful. */
#define __arch_compare_and_exchange_bool_8_int(mem, newval, oldval, model) \
({ \
typeof (*mem) __oldval = (oldval); \
!__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, model, \
__ATOMIC_RELAXED); \
})
#define __arch_compare_and_exchange_bool_16_int(mem, newval, oldval, model) \
({ \
typeof (*mem) __oldval = (oldval); \
!__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, model, \
__ATOMIC_RELAXED); \
})
#define __arch_compare_and_exchange_bool_32_int(mem, newval, oldval, model) \
({ \
typeof (*mem) __oldval = (oldval); \
!__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, model, \
__ATOMIC_RELAXED); \
})
#define __arch_compare_and_exchange_bool_64_int(mem, newval, oldval, model) \
({ \
typeof (*mem) __oldval = (oldval); \
!__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, model, \
__ATOMIC_RELAXED); \
})
#define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \
({ \
typeof (*mem) __oldval = (oldval); \
__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, model, \
__ATOMIC_RELAXED); \
__oldval; \
})
#define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \
({ \
typeof (*mem) __oldval = (oldval); \
__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, model, \
__ATOMIC_RELAXED); \
__oldval; \
})
#define __arch_compare_and_exchange_val_32_int(mem, newval, oldval, model) \
({ \
typeof (*mem) __oldval = (oldval); \
__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, model, \
__ATOMIC_RELAXED); \
__oldval; \
})
#define __arch_compare_and_exchange_val_64_int(mem, newval, oldval, model) \
({ \
typeof (*mem) __oldval = (oldval); \
__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, model, \
__ATOMIC_RELAXED); \
__oldval; \
})
/* Atomic compare and exchange. */
#define atomic_compare_and_exchange_bool_acq(mem, new, old) \
__atomic_bool_bysize (__arch_compare_and_exchange_bool, int, mem, new, old, \
__ATOMIC_ACQUIRE)
#define atomic_compare_and_exchange_val_acq(mem, new, old) \
__atomic_val_bysize (__arch_compare_and_exchange_val, int, mem, new, old, \
__ATOMIC_ACQUIRE)
#define atomic_compare_and_exchange_val_rel(mem, new, old) \
__atomic_val_bysize (__arch_compare_and_exchange_val, int, mem, new, old, \
__ATOMIC_RELEASE)
/* Atomic exchange (without compare). */
#define __arch_exchange_8_int(mem, newval, model) \
__atomic_exchange_n (mem, newval, model)
#define __arch_exchange_16_int(mem, newval, model) \
__atomic_exchange_n (mem, newval, model)
#define __arch_exchange_32_int(mem, newval, model) \
__atomic_exchange_n (mem, newval, model)
#define __arch_exchange_64_int(mem, newval, model) \
__atomic_exchange_n (mem, newval, model)
#define atomic_exchange_acq(mem, value) \
__atomic_val_bysize (__arch_exchange, int, mem, value, __ATOMIC_ACQUIRE)
#define atomic_exchange_rel(mem, value) \
__atomic_val_bysize (__arch_exchange, int, mem, value, __ATOMIC_RELEASE)
/* Atomically add value and return the previous (unincremented) value. */
#define __arch_exchange_and_add_8_int(mem, value, model) \
__atomic_fetch_add (mem, value, model)
#define __arch_exchange_and_add_16_int(mem, value, model) \
__atomic_fetch_add (mem, value, model)
#define __arch_exchange_and_add_32_int(mem, value, model) \
__atomic_fetch_add (mem, value, model)
#define __arch_exchange_and_add_64_int(mem, value, model) \
__atomic_fetch_add (mem, value, model)
#define atomic_exchange_and_add_acq(mem, value) \
__atomic_val_bysize (__arch_exchange_and_add, int, mem, value, \
__ATOMIC_ACQUIRE)
#define atomic_exchange_and_add_rel(mem, value) \
__atomic_val_bysize (__arch_exchange_and_add, int, mem, value, \
__ATOMIC_RELEASE)
#endif /* bits/atomic.h */
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