--- /dev/null
+/* 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
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