sysdeps/sparc/sparc64/atomic-machine.h

   1 /* Atomic operations.  sparc64 version.
   2    Copyright (C) 2003-2016 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 1
  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 #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
  74 ({                                                                            \
  75   __typeof (*(mem)) __acev_tmp;                                               \
  76   __typeof (mem) __acev_mem = (mem);                                          \
  77   if (__builtin_constant_p (oldval) && (oldval) == 0)                         \
  78     __asm __volatile ("casx [%3], %%g0, %0"                                   \
  79                       : "=r" (__acev_tmp), "=m" (*__acev_mem)                 \
  80                       : "m" (*__acev_mem), "r" (__acev_mem),                  \
  81                         "0" ((long) (newval)) : "memory");                    \
  82   else                                                                        \
  83     __asm __volatile ("casx [%4], %2, %0"                                     \
  84                       : "=r" (__acev_tmp), "=m" (*__acev_mem)                 \
  85                       : "r" ((long) (oldval)), "m" (*__acev_mem),             \
  86                         "r" (__acev_mem), "0" ((long) (newval)) : "memory");  \
  87   __acev_tmp; })
  88
  89 #define atomic_exchange_acq(mem, newvalue) \
  90   ({ __typeof (*(mem)) __oldval, __val;                                       \
  91      __typeof (mem) __memp = (mem);                                           \
  92      __typeof (*(mem)) __value = (newvalue);                                  \
  93                                                                               \
  94      if (sizeof (*(mem)) == 4)                                                \
  95        __asm ("swap %0, %1"                                                   \
  96               : "=m" (*__memp), "=r" (__oldval)                               \
  97               : "m" (*__memp), "1" (__value) : "memory");                     \
  98      else                                                                     \
  99        {                                                                      \
 100          __val = *__memp;                                                     \
 101          do                                                                   \
 102            {                                                                  \
 103              __oldval = __val;                                                \
 104              __val = atomic_compare_and_exchange_val_acq (__memp, __value,    \
 105                                                           __oldval);          \
 106            }                                                                  \
 107          while (__builtin_expect (__val != __oldval, 0));                     \
 108        }                                                                      \
 109      __oldval; })
 110
 111 #define atomic_compare_and_exchange_val_24_acq(mem, newval, oldval) \
 112   atomic_compare_and_exchange_val_acq (mem, newval, oldval)
 113
 114 #define atomic_exchange_24_rel(mem, newval) \
 115   atomic_exchange_rel (mem, newval)
 116
 117 #define atomic_full_barrier() \
 118   __asm __volatile ("membar #LoadLoad | #LoadStore"                           \
 119                           " | #StoreLoad | #StoreStore" : : : "memory")
 120 #define atomic_read_barrier() \
 121   __asm __volatile ("membar #LoadLoad | #LoadStore" : : : "memory")
 122 #define atomic_write_barrier() \
 123   __asm __volatile ("membar #LoadStore | #StoreStore" : : : "memory")
 124
 125 extern void __cpu_relax (void);
 126 #define atomic_spin_nop() __cpu_relax ()