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Diffstat (limited to 'sysdeps/sparc/atomic-machine.h')
| -rw-r--r-- | sysdeps/sparc/atomic-machine.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/sysdeps/sparc/atomic-machine.h b/sysdeps/sparc/atomic-machine.h new file mode 100644 index 0000000000..4453184c9c --- /dev/null +++ b/sysdeps/sparc/atomic-machine.h @@ -0,0 +1,95 @@ +/* Atomic operations. Sparc version. + Copyright (C) 2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _ATOMIC_MACHINE_H +#define _ATOMIC_MACHINE_H 1 + +#include <stdint.h> + +typedef int8_t atomic8_t; +typedef uint8_t uatomic8_t; +typedef int_fast8_t atomic_fast8_t; +typedef uint_fast8_t uatomic_fast8_t; + +typedef int16_t atomic16_t; +typedef uint16_t uatomic16_t; +typedef int_fast16_t atomic_fast16_t; +typedef uint_fast16_t uatomic_fast16_t; + +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 __arch64__ +# define __HAVE_64B_ATOMICS 1 +#else +# define __HAVE_64B_ATOMICS 0 +#endif +#define USE_ATOMIC_COMPILER_BUILTINS 1 + +/* XXX Is this actually correct? */ +#define ATOMIC_EXCHANGE_USES_CAS __HAVE_64B_ATOMICS + +/* Compare and exchange. + For all "bool" routines, we return FALSE if exchange succesful. */ + +#define __arch_compare_and_exchange_val_int(mem, newval, oldval, model) \ + ({ \ + typeof (*mem) __oldval = (oldval); \ + __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ + model, __ATOMIC_RELAXED); \ + __oldval; \ + }) + +#define atomic_compare_and_exchange_val_acq(mem, new, old) \ + ({ \ + __typeof ((__typeof (*(mem))) *(mem)) __result; \ + if (sizeof (*mem) == 4 \ + || (__HAVE_64B_ATOMICS && sizeof (*mem) == 8)) \ + __result = __arch_compare_and_exchange_val_int (mem, new, old, \ + __ATOMIC_ACQUIRE); \ + else \ + abort (); \ + __result; \ + }) + +#ifdef __sparc_v9__ +# define atomic_full_barrier() \ + __asm __volatile ("membar #LoadLoad | #LoadStore" \ + " | #StoreLoad | #StoreStore" : : : "memory") +# define atomic_read_barrier() \ + __asm __volatile ("membar #LoadLoad | #LoadStore" : : : "memory") +# define atomic_write_barrier() \ + __asm __volatile ("membar #LoadStore | #StoreStore" : : : "memory") + +extern void __cpu_relax (void); +# define atomic_spin_nop() __cpu_relax () +#endif + +#endif /* _ATOMIC_MACHINE_H */ |