sysdeps/sparc/sparc32/sparcv9/bits/atomic.h

   1 /* Atomic operations.  sparcv9 version.
   2    Copyright (C) 2003-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <stdint.h>
  21
  22 typedef int8_t atomic8_t;
  23 typedef uint8_t uatomic8_t;
  24 typedef int_fast8_t atomic_fast8_t;
  25 typedef uint_fast8_t uatomic_fast8_t;
  26
  27 typedef int16_t atomic16_t;
  28 typedef uint16_t uatomic16_t;
  29 typedef int_fast16_t atomic_fast16_t;
  30 typedef uint_fast16_t uatomic_fast16_t;
  31
  32 typedef int32_t atomic32_t;
  33 typedef uint32_t uatomic32_t;
  34 typedef int_fast32_t atomic_fast32_t;
  35 typedef uint_fast32_t uatomic_fast32_t;
  36
  37 typedef int64_t atomic64_t;
  38 typedef uint64_t uatomic64_t;
  39 typedef int_fast64_t atomic_fast64_t;
  40 typedef uint_fast64_t uatomic_fast64_t;
  41
  42 typedef intptr_t atomicptr_t;
  43 typedef uintptr_t uatomicptr_t;
  44 typedef intmax_t atomic_max_t;
  45 typedef uintmax_t uatomic_max_t;
  46
  47 #define __HAVE_64B_ATOMICS 0
  48 #define USE_ATOMIC_COMPILER_BUILTINS 0
  49
  50
  51 #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
  52   (abort (), (__typeof (*mem)) 0)
  53
  54 #define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
  55   (abort (), (__typeof (*mem)) 0)
  56
  57 #define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
  58 ({                                                                            \
  59   __typeof (*(mem)) __acev_tmp;                                               \
  60   __typeof (mem) __acev_mem = (mem);                                          \
  61   if (__builtin_constant_p (oldval) && (oldval) == 0)                         \
  62     __asm __volatile ("cas [%3], %%g0, %0"                                    \
  63                       : "=r" (__acev_tmp), "=m" (*__acev_mem)                 \
  64                       : "m" (*__acev_mem), "r" (__acev_mem),                  \
  65                         "0" (newval) : "memory");                             \
  66   else                                                                        \
  67     __asm __volatile ("cas [%4], %2, %0"                                      \
  68                       : "=r" (__acev_tmp), "=m" (*__acev_mem)                 \
  69                       : "r" (oldval), "m" (*__acev_mem), "r" (__acev_mem),    \
  70                         "0" (newval) : "memory");                             \
  71   __acev_tmp; })
  72
  73 /* This can be implemented if needed.  */
  74 #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
  75   (abort (), (__typeof (*mem)) 0)
  76
  77 #define atomic_exchange_acq(mem, newvalue) \
  78   ({ __typeof (*(mem)) __oldval;                                              \
  79      __typeof (mem) __memp = (mem);                                           \
  80      __typeof (*(mem)) __value = (newvalue);                                  \
  81                                                                               \
  82      if (sizeof (*(mem)) == 4)                                                \
  83        __asm ("swap %0, %1"                                                   \
  84               : "=m" (*__memp), "=r" (__oldval)                               \
  85               : "m" (*__memp), "1" (__value) : "memory");                     \
  86      else                                                                     \
  87        abort ();                                                              \
  88      __oldval; })
  89
  90 #define atomic_compare_and_exchange_val_24_acq(mem, newval, oldval) \
  91   atomic_compare_and_exchange_val_acq (mem, newval, oldval)
  92
  93 #define atomic_exchange_24_rel(mem, newval) \
  94   atomic_exchange_rel (mem, newval)
  95
  96 #define atomic_full_barrier() \
  97   __asm __volatile ("membar #LoadLoad | #LoadStore"                           \
  98                           " | #StoreLoad | #StoreStore" : : : "memory")
  99 #define atomic_read_barrier() \
 100   __asm __volatile ("membar #LoadLoad | #LoadStore" : : : "memory")
 101 #define atomic_write_barrier() \
 102   __asm __volatile ("membar #LoadStore | #StoreStore" : : : "memory")