| /* Copyright (C) 2011-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _ATOMIC_MACHINE_H |
| #define _ATOMIC_MACHINE_H 1 |
| |
| #include <stdint.h> |
| #include <features.h> |
| #include <arch/spr_def.h> |
| |
| typedef int32_t atomic32_t; |
| typedef uint32_t uatomic32_t; |
| typedef int_fast32_t atomic_fast32_t; |
| typedef uint_fast32_t uatomic_fast32_t; |
| |
| typedef int64_t atomic64_t; |
| typedef uint64_t uatomic64_t; |
| typedef int_fast64_t atomic_fast64_t; |
| typedef uint_fast64_t uatomic_fast64_t; |
| |
| typedef intptr_t atomicptr_t; |
| typedef uintptr_t uatomicptr_t; |
| typedef intmax_t atomic_max_t; |
| typedef uintmax_t uatomic_max_t; |
| |
| #ifdef _LP64 |
| # define __HAVE_64B_ATOMICS 1 |
| #else |
| /* tilegx32 does have 64-bit atomics, but assumptions in the semaphore |
| code mean that unaligned 64-bit atomics will be used if this symbol |
| is true, and unaligned atomics are not supported on tile. */ |
| # define __HAVE_64B_ATOMICS 0 |
| #endif |
| |
| #define USE_ATOMIC_COMPILER_BUILTINS 0 |
| #define ATOMIC_EXCHANGE_USES_CAS 0 |
| |
| /* Pick appropriate 8- or 4-byte instruction. */ |
| #define __atomic_update(mem, v, op) \ |
| ((__typeof (*(mem))) (__typeof (*(mem) - *(mem))) \ |
| ((sizeof (*(mem)) == 8) ? \ |
| __insn_##op ((void *) (mem), (int64_t) (__typeof((v) - (v))) (v)) : \ |
| (sizeof (*(mem)) == 4) ? \ |
| __insn_##op##4 ((void *) (mem), (int32_t) (__typeof ((v) - (v))) (v)) : \ |
| __atomic_error_bad_argument_size())) |
| |
| #define atomic_compare_and_exchange_val_acq(mem, n, o) \ |
| ({ __insn_mtspr (SPR_CMPEXCH_VALUE, (int64_t) (__typeof ((o) - (o))) (o)); \ |
| __atomic_update (mem, n, cmpexch); }) |
| #define atomic_exchange_acq(mem, newvalue) \ |
| __atomic_update (mem, newvalue, exch) |
| #define atomic_exchange_and_add(mem, value) \ |
| __atomic_update (mem, value, fetchadd) |
| #define atomic_and_val(mem, mask) \ |
| __atomic_update (mem, mask, fetchand) |
| #define atomic_or_val(mem, mask) \ |
| __atomic_update (mem, mask, fetchor) |
| #define atomic_decrement_if_positive(mem) \ |
| __atomic_update (mem, -1, fetchaddgez) |
| |
| /* Barrier macro. */ |
| #define atomic_full_barrier() __sync_synchronize() |
| |
| /* APIs with "release" semantics. */ |
| #define atomic_compare_and_exchange_val_rel(mem, n, o) \ |
| ({ \ |
| atomic_full_barrier (); \ |
| atomic_compare_and_exchange_val_acq ((mem), (n), (o)); \ |
| }) |
| #define atomic_exchange_rel(mem, n) \ |
| ({ \ |
| atomic_full_barrier (); \ |
| atomic_exchange_acq ((mem), (n)); \ |
| }) |
| |
| /* Various macros that should just be synonyms. */ |
| #define catomic_exchange_and_add atomic_exchange_and_add |
| #define atomic_and(mem, mask) ((void) atomic_and_val ((mem), (mask))) |
| #define catomic_and atomic_and |
| #define atomic_or(mem, mask) ((void) atomic_or_val ((mem), (mask))) |
| #define catomic_or atomic_or |
| |
| /* atomic_bit_test_set in terms of atomic_or_val. */ |
| #define atomic_bit_test_set(mem, bit) \ |
| ({ __typeof (*(mem)) __att0_mask = ((__typeof (*(mem))) 1 << (bit)); \ |
| atomic_or_val ((mem), __att0_mask) & __att0_mask; }) |
| |
| /* |
| * This non-existent symbol is called for unsupporrted sizes, |
| * indicating a bug in the caller. |
| */ |
| extern int __atomic_error_bad_argument_size(void) |
| __attribute__ ((warning ("bad sizeof atomic argument"))); |
| |
| #endif /* _ATOMIC_MACHINE_H */ |