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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [sync.c] - Rev 438
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/* 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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