about summary refs log tree commit diff
path: root/sysdeps/csky/atomic-machine.h
blob: 35853719674c3df82f87c0af22b6b6dd97152bed (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
/* Atomic operations.  C-SKY version.
   Copyright (C) 2018-2022 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 __CSKY_ATOMIC_H_
#define __CSKY_ATOMIC_H_

#define __HAVE_64B_ATOMICS 0
#define USE_ATOMIC_COMPILER_BUILTINS 1
#define ATOMIC_EXCHANGE_USES_CAS 1

#define __arch_compare_and_exchange_bool_8_int(mem, newval, oldval, model) \
  (abort (), 0)

#define __arch_compare_and_exchange_bool_16_int(mem, newval, oldval, model) \
  (abort (), 0)

#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) \
  (abort (), 0)

#define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \
  (abort (), (__typeof (*mem)) 0)

#define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \
  (abort (), (__typeof (*mem)) 0)

#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) \
  (abort (), (__typeof (*mem)) 0)

#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)

#endif /* atomic-machine.h */