sysdeps/sparc/sparc64/bits/atomic.h

   1 /* Atomic operations.  sparc64 version.
   2    Copyright (C) 2003, 2006 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <stdint.h>
  22
  23 typedef int8_t atomic8_t;
  24 typedef uint8_t uatomic8_t;
  25 typedef int_fast8_t atomic_fast8_t;
  26 typedef uint_fast8_t uatomic_fast8_t;
  27
  28 typedef int16_t atomic16_t;
  29 typedef uint16_t uatomic16_t;
  30 typedef int_fast16_t atomic_fast16_t;
  31 typedef uint_fast16_t uatomic_fast16_t;
  32
  33 typedef int32_t atomic32_t;
  34 typedef uint32_t uatomic32_t;
  35 typedef int_fast32_t atomic_fast32_t;
  36 typedef uint_fast32_t uatomic_fast32_t;
  37
  38 typedef int64_t atomic64_t;
  39 typedef uint64_t uatomic64_t;
  40 typedef int_fast64_t atomic_fast64_t;
  41 typedef uint_fast64_t uatomic_fast64_t;
  42
  43 typedef intptr_t atomicptr_t;
  44 typedef uintptr_t uatomicptr_t;
  45 typedef intmax_t atomic_max_t;
  46 typedef uintmax_t uatomic_max_t;
  47
  48
  49 #define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
  50   (abort (), (__typeof (*mem)) 0)
  51
  52 #define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
  53   (abort (), (__typeof (*mem)) 0)
  54
  55 #define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
  56 ({                                                                            \
  57   __typeof (*(mem)) __acev_tmp;                                               \
  58   __typeof (mem) __acev_mem = (mem);                                          \
  59   __asm __volatile ("cas [%4], %2, %0"                                        \
  60                     : "=r" (__acev_tmp), "=m" (*__acev_mem)                   \
  61                     : "r" (oldval), "m" (*__acev_mem), "r" (__acev_mem),      \
  62                       "0" (newval) : "memory");                               \
  63   __acev_tmp; })
  64
  65 #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
  66 ({                                                                            \
  67   __typeof (*(mem)) __acev_tmp;                                               \
  68   __typeof (mem) __acev_mem = (mem);                                          \
  69   __asm __volatile ("casx [%4], %2, %0"                                       \
  70                     : "=r" (__acev_tmp), "=m" (*__acev_mem)                   \
  71                     : "r" ((long) (oldval)), "m" (*__acev_mem),               \
  72                       "r" (__acev_mem), "0" ((long) (newval)) : "memory");    \
  73   __acev_tmp; })
  74
  75 #define atomic_exchange_acq(mem, newvalue) \
  76   ({ __typeof (*(mem)) __oldval, __val;                                       \
  77      __typeof (mem) __memp = (mem);                                           \
  78      __typeof (*(mem)) __value = (newvalue);                                  \
  79                                                                               \
  80      if (sizeof (*(mem)) == 4)                                                \
  81        __asm ("swap %0, %1"                                                   \
  82               : "=m" (*__memp), "=r" (__oldval)                               \
  83               : "m" (*__memp), "1" (__value) : "memory");                     \
  84      else                                                                     \
  85        {                                                                      \
  86          __val = *__memp;                                                     \
  87          do                                                                   \
  88            {                                                                  \
  89              __oldval = __val;                                                \
  90              __val = atomic_compare_and_exchange_val_acq (__memp, __value,    \
  91                                                           __oldval);          \
  92            }                                                                  \
  93          while (__builtin_expect (__val != __oldval, 0));                     \
  94        }                                                                      \
  95      __oldval; })
  96
  97 #define atomic_compare_and_exchange_val_24_acq(mem, newval, oldval) \
  98   atomic_compare_and_exchange_val_acq (mem, newval, oldval)
  99
 100 #define atomic_exchange_24_rel(mem, newval) \
 101   atomic_exchange_rel (mem, newval)
 102
 103 #define atomic_full_barrier() \
 104   __asm __volatile ("membar #LoadLoad | #LoadStore"                           \
 105                           " | #StoreLoad | #StoreStore" : : : "memory")
 106 #define atomic_read_barrier() \
 107   __asm __volatile ("membar #LoadLoad | #LoadStore" : : : "memory")
 108 #define atomic_write_barrier() \
 109   __asm __volatile ("membar #StoreLoad | #StoreStore" : : : "memory")