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/* Copyright (C) 2003-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
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/>. */
#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;
#define USE_ATOMIC_COMPILER_BUILTINS 0
#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
(abort (), (__typeof (*mem)) 0)
#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
(abort (), (__typeof (*mem)) 0)
#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
({ __typeof (mem) __archmem = (mem); \
__typeof (*mem) __archold = (oldval); \
__asm__ __volatile__ ("cs %0,%2,%1" \
: "+d" (__archold), "=Q" (*__archmem) \
: "d" (newval), "m" (*__archmem) : "cc", "memory" ); \
__archold; })
#ifdef __s390x__
# define __HAVE_64B_ATOMICS 1
# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
({ __typeof (mem) __archmem = (mem); \
__typeof (*mem) __archold = (oldval); \
__asm__ __volatile__ ("csg %0,%2,%1" \
: "+d" (__archold), "=Q" (*__archmem) \
: "d" ((long) (newval)), "m" (*__archmem) : "cc", "memory" ); \
__archold; })
#else
# define __HAVE_64B_ATOMICS 0
/* For 31 bit we do not really need 64-bit compare-and-exchange. We can
implement them by use of the csd instruction. The straightforward
implementation causes warnings so we skip the definition for now. */
# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
(abort (), (__typeof (*mem)) 0)
#endif
/* Store NEWVALUE in *MEM and return the old value. */
/* On s390, the atomic_exchange_acq is different from generic implementation,
because the generic one does not use the condition-code of cs-instruction
to determine if looping is needed. Instead it saves the old-value and
compares it against old-value returned by cs-instruction. */
#ifdef __s390x__
# define atomic_exchange_acq(mem, newvalue) \
({ __typeof (mem) __atg5_memp = (mem); \
__typeof (*(mem)) __atg5_oldval = *__atg5_memp; \
__typeof (*(mem)) __atg5_value = (newvalue); \
if (sizeof (*mem) == 4) \
__asm__ __volatile__ ("0: cs %0,%2,%1\n" \
" jl 0b" \
: "+d" (__atg5_oldval), "=Q" (*__atg5_memp) \
: "d" (__atg5_value), "m" (*__atg5_memp) \
: "cc", "memory" ); \
else if (sizeof (*mem) == 8) \
__asm__ __volatile__ ("0: csg %0,%2,%1\n" \
" jl 0b" \
: "+d" ( __atg5_oldval), "=Q" (*__atg5_memp) \
: "d" ((long) __atg5_value), "m" (*__atg5_memp) \
: "cc", "memory" ); \
else \
abort (); \
__atg5_oldval; })
#else
# define atomic_exchange_acq(mem, newvalue) \
({ __typeof (mem) __atg5_memp = (mem); \
__typeof (*(mem)) __atg5_oldval = *__atg5_memp; \
__typeof (*(mem)) __atg5_value = (newvalue); \
if (sizeof (*mem) == 4) \
__asm__ __volatile__ ("0: cs %0,%2,%1\n" \
" jl 0b" \
: "+d" (__atg5_oldval), "=Q" (*__atg5_memp) \
: "d" (__atg5_value), "m" (*__atg5_memp) \
: "cc", "memory" ); \
else \
abort (); \
__atg5_oldval; })
#endif
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