Subversion Repositories openrisc

/* Out-of-line libgcc versions of __sync_* builtins.  */

/* Copyright (C) 2008, 2009  Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under

the terms of the GNU General Public License as published by the Free

Software Foundation; either version 3, or (at your option) any later

version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY

WARRANTY; without even the implied warranty of MERCHANTABILITY or

FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

for more details.

Under Section 7 of GPL version 3, you are granted additional

permissions described in the GCC Runtime Library Exception, version

3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and

a copy of the GCC Runtime Library Exception along with this program;

see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

<http://www.gnu.org/licenses/>.  */

/* This file is used by targets whose makefiles define LIBGCC_SYNC

   to "yes".  It is compiled with LIBGCC_SYNC_CFLAGS and provides

   out-of-line versions of all relevant __sync_* primitives.

   These routines are intended for targets like MIPS that have two

   ISA encodings (the "normal" ISA and the MIPS16 ISA).  The normal

   ISA provides full synchronization capabilities but the MIPS16 ISA

   has no encoding for them.  MIPS16 code must therefore call external

   non-MIPS16 implementations of the __sync_* routines.

   The file is compiled once for each routine.  The following __foo

   routines are selected by defining a macro called L<foo>:

       __sync_synchronize

   The following __foo_N routines are selected by defining FN=foo

   and SIZE=N:

       __sync_fetch_and_add_N

       __sync_fetch_and_sub_N

       __sync_fetch_and_or_N

       __sync_fetch_and_and_N

       __sync_fetch_and_xor_N

       __sync_fetch_and_nand_N

       __sync_add_and_fetch_N

       __sync_sub_and_fetch_N

       __sync_or_and_fetch_N

       __sync_and_and_fetch_N

       __sync_xor_and_fetch_N

       __sync_nand_and_fetch_N

       __sync_bool_compare_and_swap_N

       __sync_val_compare_and_swap_N

       __sync_lock_test_and_set_N

   SIZE can be 1, 2, 4, 8 or 16.  __foo_N is omitted if the target does

   not provide __sync_compare_and_swap_N.

   Note that __sync_lock_release does not fall back on external

   __sync_lock_release_N functions.  The default implementation

   of __sync_lock_release is a call to __sync_synchronize followed

   by a store of zero, so we don't need separate library functions

   for it.  */

#if defined FN

/* Define macros for each __sync_* function type.  Each macro defines a

   local function called <NAME>_<UNITS> that acts like __<NAME>_<UNITS>.

   TYPE is a type that has UNITS bytes.  */

#define DEFINE_V_PV(NAME, UNITS, TYPE)                                  \

  static TYPE                                                           \

  NAME##_##UNITS (TYPE *ptr, TYPE value)                                \

  {                                                                     \

    return __##NAME (ptr, value);                                       \

  }

#define DEFINE_V_PVV(NAME, UNITS, TYPE)                         \

  static TYPE                                                           \

  NAME##_##UNITS (TYPE *ptr, TYPE value1, TYPE value2)                  \

  {                                                                     \

    return __##NAME (ptr, value1, value2);                              \

  }

#define DEFINE_BOOL_PVV(NAME, UNITS, TYPE)                              \

  static _Bool                                                          \

  NAME##_##UNITS (TYPE *ptr, TYPE value1, TYPE value2)                  \

  {                                                                     \

    return __##NAME (ptr, value1, value2);                              \

  }

/* Map function names to the appropriate DEFINE_* macro.  */

#define local_sync_fetch_and_add DEFINE_V_PV

#define local_sync_fetch_and_sub DEFINE_V_PV

#define local_sync_fetch_and_or DEFINE_V_PV

#define local_sync_fetch_and_and DEFINE_V_PV

#define local_sync_fetch_and_xor DEFINE_V_PV

#define local_sync_fetch_and_nand DEFINE_V_PV

#define local_sync_add_and_fetch DEFINE_V_PV

#define local_sync_sub_and_fetch DEFINE_V_PV

#define local_sync_or_and_fetch DEFINE_V_PV

#define local_sync_and_and_fetch DEFINE_V_PV

#define local_sync_xor_and_fetch DEFINE_V_PV

#define local_sync_nand_and_fetch DEFINE_V_PV

#define local_sync_bool_compare_and_swap DEFINE_BOOL_PVV

#define local_sync_val_compare_and_swap DEFINE_V_PVV

#define local_sync_lock_test_and_set DEFINE_V_PV

/* Define the function __<NAME>_<UNITS>, given that TYPE is a type with

   UNITS bytes.  */

#define DEFINE1(NAME, UNITS, TYPE) \

  static int unused[sizeof (TYPE) == UNITS ? 1 : -1]    \

    __attribute__((unused));                            \

  local_##NAME (NAME, UNITS, TYPE);                     \

  typeof (NAME##_##UNITS) __##NAME##_##UNITS            \

    __attribute__((alias (#NAME "_" #UNITS)));

/* As above, but performing macro expansion on the arguments.  */

#define DEFINE(NAME, UNITS, TYPE) DEFINE1 (NAME, UNITS, TYPE)

/* Find an appropriate type TYPE for SIZE and invoke DEFINE (FN, SIZE, TYPE).

   The types chosen here may be incorrect for some targets.

   For example, targets with 16-byte atomicity support might not

   support OImode.  We would need some kind of target-specific

   override if that becomes a problem.  */

#if SIZE == 1 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1

typedef unsigned int UQItype __attribute__((mode (QI)));

DEFINE (FN, 1, UQItype)

#elif SIZE == 2 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2

typedef unsigned int UHItype __attribute__((mode (HI)));

DEFINE (FN, 2, UHItype)

#elif SIZE == 4 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4

typedef unsigned int USItype __attribute__((mode (SI)));

DEFINE (FN, 4, USItype)

#elif SIZE == 8 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8

typedef unsigned int UDItype __attribute__((mode (DI)));

DEFINE (FN, 8, UDItype)

#elif SIZE == 16 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16

typedef unsigned int UOItype __attribute__((mode (OI)));

DEFINE (FN, 8, UOItype)

#endif

#elif __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 \

      || __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 \

      || __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 \

      || __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 \

      || __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16

#if defined Lsync_synchronize

static void

sync_synchronize (void)

{

  __sync_synchronize ();

}

typeof (sync_synchronize) __sync_synchronize \

  __attribute__((alias ("sync_synchronize")));

#endif

#endif