[thirdparty/glibc.git] / sysdeps / ia64 / bits / atomic.h

/* Copyright (C) 2003-2015 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
   <http://www.gnu.org/licenses/>.  */

#include <stdint.h>
#include <ia64intrin.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 __HAVE_64B_ATOMICS 1
#define USE_ATOMIC_COMPILER_BUILTINS 0


#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
  (abort (), 0)

#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
  (abort (), 0)

#define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
  (!__sync_bool_compare_and_swap ((mem), (int) (long) (oldval), \
				  (int) (long) (newval)))

#define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
  (!__sync_bool_compare_and_swap ((mem), (long) (oldval), \
				  (long) (newval)))

#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) \
  __sync_val_compare_and_swap ((mem), (int) (long) (oldval), \
			       (int) (long) (newval))

#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
  __sync_val_compare_and_swap ((mem), (long) (oldval), (long) (newval))

/* Atomically store newval and return the old value.  */
#define atomic_exchange_acq(mem, value) \
  __sync_lock_test_and_set (mem, value)

#define atomic_exchange_rel(mem, value) \
  (__sync_synchronize (), __sync_lock_test_and_set (mem, value))

#define atomic_exchange_and_add(mem, value) \
  ({ __typeof (*mem) __result;						      \
     __result = __sync_fetch_and_add ((mem), (int) (value));		      \
     __result; })

#define atomic_decrement_if_positive(mem) \
  ({ __typeof (*mem) __oldval, __val;					      \
     __typeof (mem) __memp = (mem);					      \
									      \
     __val = (*__memp);							      \
     do									      \
       {								      \
	 __oldval = __val;						      \
	 if (__builtin_expect (__val <= 0, 0))				      \
	   break;							      \
	 __val = atomic_compare_and_exchange_val_acq (__memp,	__oldval - 1, \
						      __oldval);	      \
       }								      \
     while (__builtin_expect (__val != __oldval, 0));			      \
     __oldval; })

#define atomic_bit_test_set(mem, bit) \
  ({ __typeof (*mem) __oldval, __val;					      \
     __typeof (mem) __memp = (mem);					      \
     __typeof (*mem) __mask = ((__typeof (*mem)) 1 << (bit));		      \
									      \
     __val = (*__memp);							      \
     do									      \
       {								      \
	 __oldval = __val;						      \
	 __val = atomic_compare_and_exchange_val_acq (__memp,		      \
						      __oldval | __mask,      \
						      __oldval);	      \
       }								      \
     while (__builtin_expect (__val != __oldval, 0));			      \
     __oldval & __mask; })

#define atomic_full_barrier() __sync_synchronize ()
Commit	Line	Data
b168057a	1	/* Copyright (C) 2003-2015 Free Software Foundation, Inc.
d5efd131 MF	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Lesser General Public License for more details.
	13
	14	You should have received a copy of the GNU Lesser General Public
75efb018 MF	15	License along with the GNU C Library; if not, see
75efb018 MF	16	<http://www.gnu.org/licenses/>. */
d5efd131 MF	17
	18	#include <stdint.h>
	19	#include <ia64intrin.h>
	20
	21	typedef int8_t atomic8_t;
	22	typedef uint8_t uatomic8_t;
	23	typedef int_fast8_t atomic_fast8_t;
	24	typedef uint_fast8_t uatomic_fast8_t;
	25
	26	typedef int16_t atomic16_t;
	27	typedef uint16_t uatomic16_t;
	28	typedef int_fast16_t atomic_fast16_t;
	29	typedef uint_fast16_t uatomic_fast16_t;
	30
	31	typedef int32_t atomic32_t;
	32	typedef uint32_t uatomic32_t;
	33	typedef int_fast32_t atomic_fast32_t;
	34	typedef uint_fast32_t uatomic_fast32_t;
	35
	36	typedef int64_t atomic64_t;
	37	typedef uint64_t uatomic64_t;
	38	typedef int_fast64_t atomic_fast64_t;
	39	typedef uint_fast64_t uatomic_fast64_t;
	40
	41	typedef intptr_t atomicptr_t;
	42	typedef uintptr_t uatomicptr_t;
	43	typedef intmax_t atomic_max_t;
	44	typedef uintmax_t uatomic_max_t;
	45
1ea339b6 TR	46	#define __HAVE_64B_ATOMICS 1
	47	#define USE_ATOMIC_COMPILER_BUILTINS 0
	48
d5efd131 MF	49
	50	#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
	51	(abort (), 0)
	52
	53	#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
	54	(abort (), 0)
	55
	56	#define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
	57	(!__sync_bool_compare_and_swap ((mem), (int) (long) (oldval), \
	58	(int) (long) (newval)))
	59
	60	#define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
	61	(!__sync_bool_compare_and_swap ((mem), (long) (oldval), \
	62	(long) (newval)))
	63
	64	#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
	65	(abort (), (__typeof (*mem)) 0)
	66
	67	#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
	68	(abort (), (__typeof (*mem)) 0)
	69
	70	#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
	71	__sync_val_compare_and_swap ((mem), (int) (long) (oldval), \
	72	(int) (long) (newval))
	73
	74	#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
	75	__sync_val_compare_and_swap ((mem), (long) (oldval), (long) (newval))
	76
	77	/* Atomically store newval and return the old value. */
	78	#define atomic_exchange_acq(mem, value) \
	79	__sync_lock_test_and_set (mem, value)
	80
	81	#define atomic_exchange_rel(mem, value) \
	82	(__sync_synchronize (), __sync_lock_test_and_set (mem, value))
	83
	84	#define atomic_exchange_and_add(mem, value) \
	85	({ __typeof (*mem) __result; \
	86	__result = __sync_fetch_and_add ((mem), (int) (value)); \
	87	__result; })
	88
	89	#define atomic_decrement_if_positive(mem) \
	90	({ __typeof (*mem) __oldval, __val; \
	91	__typeof (mem) __memp = (mem); \
	92	\
	93	__val = (*__memp); \
	94	do \
	95	{ \
	96	__oldval = __val; \
	97	if (__builtin_expect (__val <= 0, 0)) \
	98	break; \
	99	__val = atomic_compare_and_exchange_val_acq (__memp, __oldval - 1, \
	100	__oldval); \
	101	} \
	102	while (__builtin_expect (__val != __oldval, 0)); \
	103	__oldval; })
	104
	105	#define atomic_bit_test_set(mem, bit) \
	106	({ __typeof (*mem) __oldval, __val; \
	107	__typeof (mem) __memp = (mem); \
	108	__typeof (mem) __mask = ((__typeof (mem)) 1 << (bit)); \
	109	\
	110	__val = (*__memp); \
	111	do \
	112	{ \
113	__oldval = __val; \
114	__val = atomic_compare_and_exchange_val_acq (__memp, \
115	__oldval \| __mask, \
116	__oldval); \
117	} \
118	while (__builtin_expect (__val != __oldval, 0)); \
119	__oldval & __mask; })
120
121	#define atomic_full_barrier() __sync_synchronize ()