| /* Out-of-line libgcc versions of __sync_* builtins. */ |
| /* Copyright (C) 2008-2021 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 SYNC |
| to "yes". It is compiled with 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 functions called __sync_<NAME>_<UNITS>, with one macro per |
| signature. TYPE is a type that has UNITS bytes. */ |
| |
| #define DEFINE_V_PV(NAME, UNITS, TYPE) \ |
| TYPE \ |
| __##NAME##_##UNITS (TYPE *ptr, TYPE value) \ |
| { \ |
| return __##NAME (ptr, value); \ |
| } |
| |
| #define DEFINE_V_PVV(NAME, UNITS, TYPE) \ |
| TYPE \ |
| __##NAME##_##UNITS (TYPE *ptr, TYPE value1, TYPE value2) \ |
| { \ |
| return __##NAME (ptr, value1, value2); \ |
| } |
| |
| #define DEFINE_BOOL_PVV(NAME, UNITS, TYPE) \ |
| _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); |
| |
| /* 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 |
| |
| void |
| __sync_synchronize (void) |
| { |
| __sync_synchronize (); |
| } |
| |
| #endif |
| |
| #endif |