sysdeps/aarch64/atomic-machine.h

   1 /* Copyright (C) 2003-2016 Free Software Foundation, Inc.
   2
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _AARCH64_ATOMIC_MACHINE_H
  20 #define _AARCH64_ATOMIC_MACHINE_H       1
  21
  22 #include <stdint.h>
  23
  24 typedef int8_t  atomic8_t;
  25 typedef int16_t atomic16_t;
  26 typedef int32_t atomic32_t;
  27 typedef int64_t atomic64_t;
  28
  29 typedef uint8_t  uatomic8_t;
  30 typedef uint16_t uatomic16_t;
  31 typedef uint32_t uatomic32_t;
  32 typedef uint64_t uatomic64_t;
  33
  34 typedef intptr_t atomicptr_t;
  35 typedef uintptr_t uatomicptr_t;
  36 typedef intmax_t atomic_max_t;
  37 typedef uintmax_t uatomic_max_t;
  38
  39 #define __HAVE_64B_ATOMICS 1
  40 #define USE_ATOMIC_COMPILER_BUILTINS 1
  41
  42 /* Compare and exchange.
  43    For all "bool" routines, we return FALSE if exchange succesful.  */
  44
  45 # define __arch_compare_and_exchange_bool_8_int(mem, newval, oldval, model) \
  46   ({                                                                    \
  47     typeof (*mem) __oldval = (oldval);                                  \
  48     !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,   \
  49                                   model, __ATOMIC_RELAXED);             \
  50   })
  51
  52 # define __arch_compare_and_exchange_bool_16_int(mem, newval, oldval, model) \
  53   ({                                                                    \
  54     typeof (*mem) __oldval = (oldval);                                  \
  55     !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,   \
  56                                   model, __ATOMIC_RELAXED);             \
  57   })
  58
  59 # define __arch_compare_and_exchange_bool_32_int(mem, newval, oldval, model) \
  60   ({                                                                    \
  61     typeof (*mem) __oldval = (oldval);                                  \
  62     !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,   \
  63                                   model, __ATOMIC_RELAXED);             \
  64   })
  65
  66 #  define __arch_compare_and_exchange_bool_64_int(mem, newval, oldval, model) \
  67   ({                                                                    \
  68     typeof (*mem) __oldval = (oldval);                                  \
  69     !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,   \
  70                                   model, __ATOMIC_RELAXED);             \
  71   })
  72
  73 # define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \
  74   ({                                                                    \
  75     typeof (*mem) __oldval = (oldval);                                  \
  76     __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,    \
  77                                  model, __ATOMIC_RELAXED);              \
  78     __oldval;                                                           \
  79   })
  80
  81 # define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \
  82   ({                                                                    \
  83     typeof (*mem) __oldval = (oldval);                                  \
  84     __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,    \
  85                                  model, __ATOMIC_RELAXED);              \
  86     __oldval;                                                           \
  87   })
  88
  89 # define __arch_compare_and_exchange_val_32_int(mem, newval, oldval, model) \
  90   ({                                                                    \
  91     typeof (*mem) __oldval = (oldval);                                  \
  92     __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,    \
  93                                  model, __ATOMIC_RELAXED);              \
  94     __oldval;                                                           \
  95   })
  96
  97 #  define __arch_compare_and_exchange_val_64_int(mem, newval, oldval, model) \
  98   ({                                                                    \
  99     typeof (*mem) __oldval = (oldval);                                  \
 100     __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0,    \
 101                                  model, __ATOMIC_RELAXED);              \
 102     __oldval;                                                           \
 103   })
 104
 105
 106 /* Compare and exchange with "acquire" semantics, ie barrier after.  */
 107
 108 # define atomic_compare_and_exchange_bool_acq(mem, new, old)    \
 109   __atomic_bool_bysize (__arch_compare_and_exchange_bool, int,  \
 110                         mem, new, old, __ATOMIC_ACQUIRE)
 111
 112 # define atomic_compare_and_exchange_val_acq(mem, new, old)     \
 113   __atomic_val_bysize (__arch_compare_and_exchange_val, int,    \
 114                        mem, new, old, __ATOMIC_ACQUIRE)
 115
 116 /* Compare and exchange with "release" semantics, ie barrier before.  */
 117
 118 # define atomic_compare_and_exchange_bool_rel(mem, new, old)    \
 119   __atomic_bool_bysize (__arch_compare_and_exchange_bool, int,  \
 120                         mem, new, old, __ATOMIC_RELEASE)
 121
 122 # define atomic_compare_and_exchange_val_rel(mem, new, old)      \
 123   __atomic_val_bysize (__arch_compare_and_exchange_val, int,    \
 124                        mem, new, old, __ATOMIC_RELEASE)
 125
 126
 127 /* Atomic exchange (without compare).  */
 128
 129 # define __arch_exchange_8_int(mem, newval, model)      \
 130   __atomic_exchange_n (mem, newval, model)
 131
 132 # define __arch_exchange_16_int(mem, newval, model)     \
 133   __atomic_exchange_n (mem, newval, model)
 134
 135 # define __arch_exchange_32_int(mem, newval, model)     \
 136   __atomic_exchange_n (mem, newval, model)
 137
 138 #  define __arch_exchange_64_int(mem, newval, model)    \
 139   __atomic_exchange_n (mem, newval, model)
 140
 141 # define atomic_exchange_acq(mem, value)                                \
 142   __atomic_val_bysize (__arch_exchange, int, mem, value, __ATOMIC_ACQUIRE)
 143
 144 # define atomic_exchange_rel(mem, value)                                \
 145   __atomic_val_bysize (__arch_exchange, int, mem, value, __ATOMIC_RELEASE)
 146
 147
 148 /* Atomically add value and return the previous (unincremented) value.  */
 149
 150 # define __arch_exchange_and_add_8_int(mem, value, model)       \
 151   __atomic_fetch_add (mem, value, model)
 152
 153 # define __arch_exchange_and_add_16_int(mem, value, model)      \
 154   __atomic_fetch_add (mem, value, model)
 155
 156 # define __arch_exchange_and_add_32_int(mem, value, model)      \
 157   __atomic_fetch_add (mem, value, model)
 158
 159 #  define __arch_exchange_and_add_64_int(mem, value, model)     \
 160   __atomic_fetch_add (mem, value, model)
 161
 162 # define atomic_exchange_and_add_acq(mem, value)                        \
 163   __atomic_val_bysize (__arch_exchange_and_add, int, mem, value,        \
 164                        __ATOMIC_ACQUIRE)
 165
 166 # define atomic_exchange_and_add_rel(mem, value)                        \
 167   __atomic_val_bysize (__arch_exchange_and_add, int, mem, value,        \
 168                        __ATOMIC_RELEASE)
 169
 170 /* Barrier macro. */
 171 #define atomic_full_barrier() __sync_synchronize()
 172
 173 #endif