ports/sysdeps/microblaze/bits/atomic.h

   1 /* Copyright (C) 2003-2014 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 #include <stdint.h>
  20 #include <sysdep.h>
  21
  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 int32_t atomic32_t;
  29 typedef uint32_t uatomic32_t;
  30 typedef int_fast32_t atomic_fast32_t;
  31 typedef uint_fast32_t uatomic_fast32_t;
  32
  33 typedef intptr_t atomicptr_t;
  34 typedef uintptr_t uatomicptr_t;
  35 typedef intmax_t atomic_max_t;
  36 typedef uintmax_t uatomic_max_t;
  37
  38
  39 /* Microblaze does not have byte and halfword forms of load and reserve and
  40    store conditional. So for microblaze we stub out the 8- and 16-bit forms.  */
  41 #define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval)            \
  42   (abort (), 0)
  43
  44 #define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval)           \
  45   (abort (), 0)
  46
  47 #define __arch_compare_and_exchange_bool_8_rel(mem, newval, oldval)            \
  48   (abort (), 0)
  49
  50 #define __arch_compare_and_exchange_bool_16_rel(mem, newval, oldval)           \
  51   (abort (), 0)
  52
  53 #define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval)            \
  54   ({                                                                           \
  55       __typeof (*(mem)) __tmp;                                                 \
  56       __typeof (mem)  __memp = (mem);                                          \
  57       int test;                                                                \
  58       __asm __volatile (                                                       \
  59                 "   addc    r0, r0, r0;"                                       \
  60                 "1: lwx     %0, %3, r0;"                                       \
  61                 "   addic   %1, r0, 0;"                                        \
  62                 "   bnei    %1, 1b;"                                           \
  63                 "   cmp     %1, %0, %4;"                                       \
  64                 "   bnei    %1, 2f;"                                           \
  65                 "   swx     %5, %3, r0;"                                       \
  66                 "   addic   %1, r0, 0;"                                        \
  67                 "   bnei    %1, 1b;"                                           \
  68                 "2:"                                                           \
  69                     : "=&r" (__tmp),                                           \
  70                     "=&r" (test),                                              \
  71                     "=m" (*__memp)                                             \
  72                     : "r" (__memp),                                            \
  73                     "r" (oldval),                                              \
  74                     "r" (newval)                                               \
  75                     : "cc", "memory");                                         \
  76       __tmp;                                                                   \
  77   })
  78
  79 #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval)            \
  80   (abort (), (__typeof (*mem)) 0)
  81
  82 #define atomic_compare_and_exchange_val_acq(mem, newval, oldval)               \
  83   ({                                                                           \
  84     __typeof (*(mem)) __result;                                                \
  85     if (sizeof (*mem) == 4)                                                    \
  86       __result = __arch_compare_and_exchange_val_32_acq (mem, newval, oldval); \
  87     else if (sizeof (*mem) == 8)                                               \
  88       __result = __arch_compare_and_exchange_val_64_acq (mem, newval, oldval); \
  89     else                                                                       \
  90        abort ();                                                               \
  91     __result;                                                                  \
  92   })
  93
  94 #define atomic_compare_and_exchange_val_rel(mem, newval, oldval)               \
  95   ({                                                                           \
  96     __typeof (*(mem)) __result;                                                \
  97     if (sizeof (*mem) == 4)                                                    \
  98       __result = __arch_compare_and_exchange_val_32_acq (mem, newval, oldval); \
  99     else if (sizeof (*mem) == 8)                                               \
 100       __result = __arch_compare_and_exchange_val_64_acq (mem, newval, oldval); \
 101     else                                                                       \
 102        abort ();                                                               \
 103     __result;                                                                  \
 104   })
 105
 106 #define __arch_atomic_exchange_32_acq(mem, value)                              \
 107   ({                                                                           \
 108       __typeof (*(mem)) __tmp;                                                 \
 109       __typeof (mem)  __memp = (mem);                                          \
 110       int test;                                                                \
 111       __asm __volatile (                                                       \
 112                 "   addc    r0, r0, r0;"                                       \
 113                 "1: lwx     %0, %4, r0;"                                       \
 114                 "   addic   %1, r0, 0;"                                        \
 115                 "   bnei    %1, 1b;"                                           \
 116                 "   swx     %3, %4, r0;"                                       \
 117                 "   addic   %1, r0, 0;"                                        \
 118                 "   bnei    %1, 1b;"                                           \
 119                     : "=&r" (__tmp),                                           \
 120                     "=&r" (test),                                              \
 121                     "=m" (*__memp)                                             \
 122                     : "r" (value),                                             \
 123                     "r" (__memp)                                               \
 124                     : "cc", "memory");                                         \
 125       __tmp;                                                                   \
 126   })
 127
 128 #define __arch_atomic_exchange_64_acq(mem, newval)                             \
 129   (abort (), (__typeof (*mem)) 0)
 130
 131 #define atomic_exchange_acq(mem, value)                                        \
 132   ({                                                                           \
 133     __typeof (*(mem)) __result;                                                \
 134     if (sizeof (*mem) == 4)                                                    \
 135       __result = __arch_atomic_exchange_32_acq (mem, value);                   \
 136     else if (sizeof (*mem) == 8)                                               \
 137       __result = __arch_atomic_exchange_64_acq (mem, value);                   \
 138     else                                                                       \
 139        abort ();                                                               \
 140     __result;                                                                  \
 141   })
 142
 143 #define atomic_exchange_rel(mem, value)                                        \
 144   ({                                                                           \
 145     __typeof (*(mem)) __result;                                                \
 146     if (sizeof (*mem) == 4)                                                    \
 147       __result = __arch_atomic_exchange_32_acq (mem, value);                   \
 148     else if (sizeof (*mem) == 8)                                               \
 149       __result = __arch_atomic_exchange_64_acq (mem, value);                   \
 150     else                                                                       \
 151        abort ();                                                               \
 152     __result;                                                                  \
 153   })
 154
 155 #define __arch_atomic_exchange_and_add_32(mem, value)                          \
 156   ({                                                                           \
 157     __typeof (*(mem)) __tmp;                                                   \
 158       __typeof (mem)  __memp = (mem);                                          \
 159     int test;                                                                  \
 160     __asm __volatile (                                                         \
 161                 "   addc    r0, r0, r0;"                                       \
 162                 "1: lwx     %0, %4, r0;"                                       \
 163                 "   addic   %1, r0, 0;"                                        \
 164                 "   bnei    %1, 1b;"                                           \
 165                 "   add     %1, %3, %0;"                                       \
 166                 "   swx     %1, %4, r0;"                                       \
 167                 "   addic   %1, r0, 0;"                                        \
 168                 "   bnei    %1, 1b;"                                           \
 169                     : "=&r" (__tmp),                                           \
 170                     "=&r" (test),                                              \
 171                     "=m" (*__memp)                                             \
 172                     : "r" (value),                                             \
 173                     "r" (__memp)                                               \
 174                     : "cc", "memory");                                         \
 175     __tmp;                                                                     \
 176   })
 177
 178 #define __arch_atomic_exchange_and_add_64(mem, value)                          \
 179   (abort (), (__typeof (*mem)) 0)
 180
 181 #define atomic_exchange_and_add(mem, value)                                    \
 182   ({                                                                           \
 183     __typeof (*(mem)) __result;                                                \
 184     if (sizeof (*mem) == 4)                                                    \
 185       __result = __arch_atomic_exchange_and_add_32 (mem, value);               \
 186     else if (sizeof (*mem) == 8)                                               \
 187       __result = __arch_atomic_exchange_and_add_64 (mem, value);               \
 188     else                                                                       \
 189        abort ();                                                               \
 190     __result;                                                                  \
 191   })
 192
 193 #define __arch_atomic_increment_val_32(mem)                                    \
 194   ({                                                                           \
 195     __typeof (*(mem)) __val;                                                   \
 196     int test;                                                                  \
 197     __asm __volatile (                                                         \
 198                 "   addc    r0, r0, r0;"                                       \
 199                 "1: lwx     %0, %3, r0;"                                       \
 200                 "   addic   %1, r0, 0;"                                        \
 201                 "   bnei    %1, 1b;"                                           \
 202                 "   addi    %0, %0, 1;"                                        \
 203                 "   swx     %0, %3, r0;"                                       \
 204                 "   addic   %1, r0, 0;"                                        \
 205                 "   bnei    %1, 1b;"                                           \
 206                     : "=&r" (__val),                                           \
 207                     "=&r" (test),                                              \
 208                     "=m" (*mem)                                                \
 209                     : "r" (mem),                                               \
 210                     "m" (*mem)                                                 \
 211                     : "cc", "memory");                                         \
 212     __val;                                                                     \
 213   })
 214
 215 #define __arch_atomic_increment_val_64(mem)                                    \
 216   (abort (), (__typeof (*mem)) 0)
 217
 218 #define atomic_increment_val(mem)                                              \
 219   ({                                                                           \
 220     __typeof (*(mem)) __result;                                                \
 221     if (sizeof (*(mem)) == 4)                                                  \
 222       __result = __arch_atomic_increment_val_32 (mem);                         \
 223     else if (sizeof (*(mem)) == 8)                                             \
 224       __result = __arch_atomic_increment_val_64 (mem);                         \
 225     else                                                                       \
 226        abort ();                                                               \
 227     __result;                                                                  \
 228   })
 229
 230 #define atomic_increment(mem) ({ atomic_increment_val (mem); (void) 0; })
 231
 232 #define __arch_atomic_decrement_val_32(mem)                                    \
 233   ({                                                                           \
 234     __typeof (*(mem)) __val;                                                   \
 235     int test;                                                                  \
 236     __asm __volatile (                                                         \
 237                 "   addc    r0, r0, r0;"                                       \
 238                 "1: lwx     %0, %3, r0;"                                       \
 239                 "   addic   %1, r0, 0;"                                        \
 240                 "   bnei    %1, 1b;"                                           \
 241                 "   rsubi   %0, %0, 1;"                                        \
 242                 "   swx     %0, %3, r0;"                                       \
 243                 "   addic   %1, r0, 0;"                                        \
 244                 "   bnei    %1, 1b;"                                           \
 245                     : "=&r" (__val),                                           \
 246                     "=&r" (test),                                              \
 247                     "=m" (*mem)                                                \
 248                     : "r" (mem),                                               \
 249                     "m" (*mem)                                                 \
 250                     : "cc", "memory");                                         \
 251     __val;                                                                     \
 252   })
 253
 254 #define __arch_atomic_decrement_val_64(mem)                                    \
 255   (abort (), (__typeof (*mem)) 0)
 256
 257 #define atomic_decrement_val(mem)                                              \
 258   ({                                                                           \
 259     __typeof (*(mem)) __result;                                                \
 260     if (sizeof (*(mem)) == 4)                                                  \
 261       __result = __arch_atomic_decrement_val_32 (mem);                         \
 262     else if (sizeof (*(mem)) == 8)                                             \
 263       __result = __arch_atomic_decrement_val_64 (mem);                         \
 264     else                                                                       \
 265        abort ();                                                               \
 266     __result;                                                                  \
 267   })
 268
 269 #define atomic_decrement(mem) ({ atomic_decrement_val (mem); (void) 0; })