1  /* Atomic operations.  C-SKY version.
       2     Copyright (C) 2018-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library.  If not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifndef __CSKY_ATOMIC_H_
      20  #define __CSKY_ATOMIC_H_
      21  
      22  #define __HAVE_64B_ATOMICS 0
      23  #define USE_ATOMIC_COMPILER_BUILTINS 1
      24  #define ATOMIC_EXCHANGE_USES_CAS 1
      25  
      26  #define __arch_compare_and_exchange_bool_8_int(mem, newval, oldval, model) \
      27    (abort (), 0)
      28  
      29  #define __arch_compare_and_exchange_bool_16_int(mem, newval, oldval, model) \
      30    (abort (), 0)
      31  
      32  #define __arch_compare_and_exchange_bool_32_int(mem, newval, oldval, model) \
      33    ({                                                                    \
      34      typeof (*mem) __oldval = (oldval);                                  \
      35      !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,   \
      36                                    model, __ATOMIC_RELAXED);             \
      37    })
      38  
      39  #define __arch_compare_and_exchange_bool_64_int(mem, newval, oldval, model) \
      40    (abort (), 0)
      41  
      42  #define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \
      43    (abort (), (__typeof (*mem)) 0)
      44  
      45  #define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \
      46    (abort (), (__typeof (*mem)) 0)
      47  
      48  #define __arch_compare_and_exchange_val_32_int(mem, newval, oldval, model) \
      49    ({                                                                    \
      50      typeof (*mem) __oldval = (oldval);                                  \
      51      __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,    \
      52                                   model, __ATOMIC_RELAXED);              \
      53      __oldval;                                                           \
      54    })
      55  
      56  #define __arch_compare_and_exchange_val_64_int(mem, newval, oldval, model) \
      57    (abort (), (__typeof (*mem)) 0)
      58  
      59  #define atomic_compare_and_exchange_bool_acq(mem, new, old)		\
      60    __atomic_bool_bysize (__arch_compare_and_exchange_bool, int,		\
      61  			mem, new, old, __ATOMIC_ACQUIRE)
      62  
      63  #define atomic_compare_and_exchange_val_acq(mem, new, old)		\
      64    __atomic_val_bysize (__arch_compare_and_exchange_val, int,		\
      65  		       mem, new, old, __ATOMIC_ACQUIRE)
      66  
      67  #endif /* atomic-machine.h */