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130 lines
4.7 KiB
C
130 lines
4.7 KiB
C
/* Atomic operations. sparc64 version.
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Copyright (C) 2003-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdint.h>
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typedef int8_t atomic8_t;
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typedef uint8_t uatomic8_t;
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typedef int_fast8_t atomic_fast8_t;
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typedef uint_fast8_t uatomic_fast8_t;
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typedef int16_t atomic16_t;
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typedef uint16_t uatomic16_t;
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typedef int_fast16_t atomic_fast16_t;
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typedef uint_fast16_t uatomic_fast16_t;
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typedef int32_t atomic32_t;
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typedef uint32_t uatomic32_t;
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typedef int_fast32_t atomic_fast32_t;
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typedef uint_fast32_t uatomic_fast32_t;
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typedef int64_t atomic64_t;
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typedef uint64_t uatomic64_t;
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typedef int_fast64_t atomic_fast64_t;
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typedef uint_fast64_t uatomic_fast64_t;
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typedef intptr_t atomicptr_t;
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typedef uintptr_t uatomicptr_t;
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typedef intmax_t atomic_max_t;
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typedef uintmax_t uatomic_max_t;
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#define __HAVE_64B_ATOMICS 1
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#define USE_ATOMIC_COMPILER_BUILTINS 0
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/* XXX Is this actually correct? */
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#define ATOMIC_EXCHANGE_USES_CAS 1
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#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
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(abort (), (__typeof (*mem)) 0)
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#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
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(abort (), (__typeof (*mem)) 0)
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#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
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({ \
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__typeof (*(mem)) __acev_tmp; \
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__typeof (mem) __acev_mem = (mem); \
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if (__builtin_constant_p (oldval) && (oldval) == 0) \
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__asm __volatile ("cas [%3], %%g0, %0" \
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: "=r" (__acev_tmp), "=m" (*__acev_mem) \
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: "m" (*__acev_mem), "r" (__acev_mem), \
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"0" (newval) : "memory"); \
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else \
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__asm __volatile ("cas [%4], %2, %0" \
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: "=r" (__acev_tmp), "=m" (*__acev_mem) \
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: "r" (oldval), "m" (*__acev_mem), "r" (__acev_mem), \
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"0" (newval) : "memory"); \
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__acev_tmp; })
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#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
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({ \
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__typeof (*(mem)) __acev_tmp; \
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__typeof (mem) __acev_mem = (mem); \
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if (__builtin_constant_p (oldval) && (oldval) == 0) \
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__asm __volatile ("casx [%3], %%g0, %0" \
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: "=r" (__acev_tmp), "=m" (*__acev_mem) \
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: "m" (*__acev_mem), "r" (__acev_mem), \
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"0" ((long) (newval)) : "memory"); \
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else \
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__asm __volatile ("casx [%4], %2, %0" \
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: "=r" (__acev_tmp), "=m" (*__acev_mem) \
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: "r" ((long) (oldval)), "m" (*__acev_mem), \
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"r" (__acev_mem), "0" ((long) (newval)) : "memory"); \
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__acev_tmp; })
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#define atomic_exchange_acq(mem, newvalue) \
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({ __typeof (*(mem)) __oldval, __val; \
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__typeof (mem) __memp = (mem); \
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__typeof (*(mem)) __value = (newvalue); \
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\
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if (sizeof (*(mem)) == 4) \
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__asm ("swap %0, %1" \
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: "=m" (*__memp), "=r" (__oldval) \
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: "m" (*__memp), "1" (__value) : "memory"); \
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else \
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{ \
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__val = *__memp; \
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do \
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{ \
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__oldval = __val; \
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__val = atomic_compare_and_exchange_val_acq (__memp, __value, \
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__oldval); \
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} \
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while (__builtin_expect (__val != __oldval, 0)); \
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} \
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__oldval; })
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#define atomic_compare_and_exchange_val_24_acq(mem, newval, oldval) \
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atomic_compare_and_exchange_val_acq (mem, newval, oldval)
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#define atomic_exchange_24_rel(mem, newval) \
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atomic_exchange_rel (mem, newval)
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#define atomic_full_barrier() \
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__asm __volatile ("membar #LoadLoad | #LoadStore" \
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" | #StoreLoad | #StoreStore" : : : "memory")
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#define atomic_read_barrier() \
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__asm __volatile ("membar #LoadLoad | #LoadStore" : : : "memory")
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#define atomic_write_barrier() \
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__asm __volatile ("membar #LoadStore | #StoreStore" : : : "memory")
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extern void __cpu_relax (void);
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#define atomic_spin_nop() __cpu_relax ()
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