[urcu.git] / urcu / uatomic_arch_sparc64.h

#ifndef _URCU_ARCH_UATOMIC_SPARC64_H
#define _URCU_ARCH_UATOMIC_SPARC64_H

/* 
 * Copyright (c) 1991-1994 by Xerox Corporation.  All rights reserved.
 * Copyright (c) 1996-1999 by Silicon Graphics.  All rights reserved.
 * Copyright (c) 1999-2003 by Hewlett-Packard Company. All rights reserved.
 * Copyright (c) 2009      Mathieu Desnoyers
 *
 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
 * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
 *
 * Permission is hereby granted to use or copy this program
 * for any purpose,  provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 *
 * Code inspired from libuatomic_ops-1.2, inherited in part from the
 * Boehm-Demers-Weiser conservative garbage collector.
 */

#include <urcu/compiler.h>
#include <urcu/system.h>

#ifdef __cplusplus
extern "C" {
#endif 

/* cmpxchg */

static inline __attribute__((always_inline))
unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
			      unsigned long _new, int len)
{
	switch (len) {
	case 4:
	{
		__asm__ __volatile__ (
			"membar #StoreLoad | #LoadLoad\n\t"
                        "cas [%1],%2,%0\n\t"
                        "membar #StoreLoad | #StoreStore\n\t"
                        : "+&r" (_new)
                        : "r" (addr), "r" (old)
                        : "memory");

		return _new;
	}
#if (BITS_PER_LONG == 64)
	case 8:
	{
		__asm__ __volatile__ (
			"membar #StoreLoad | #LoadLoad\n\t"
                        "casx [%1],%2,%0\n\t"
                        "membar #StoreLoad | #StoreStore\n\t"
                        : "+&r" (_new)
                        : "r" (addr), "r" (old)
                        : "memory");

		return _new;
	}
#endif
	}
	__builtin_trap();
	return 0;
}


#define uatomic_cmpxchg(addr, old, _new)				    \
	((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\
						(unsigned long)(_new), 	    \
						sizeof(*(addr))))

#ifdef __cplusplus 
}
#endif

#include <urcu/uatomic_generic.h>

#endif /* _URCU_ARCH_UATOMIC_PPC_H */
Commit	Line	Data
58de5a4b MD	1	#ifndef _URCU_ARCH_UATOMIC_SPARC64_H
	2	#define _URCU_ARCH_UATOMIC_SPARC64_H
	3
	4	/*
	5	* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
	6	* Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
	7	* Copyright (c) 1999-2003 by Hewlett-Packard Company. All rights reserved.
	8	* Copyright (c) 2009 Mathieu Desnoyers
	9	*
	10	* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
	11	* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
	12	*
	13	* Permission is hereby granted to use or copy this program
	14	* for any purpose, provided the above notices are retained on all copies.
	15	* Permission to modify the code and to distribute modified code is granted,
	16	* provided the above notices are retained, and a notice that the code was
	17	* modified is included with the above copyright notice.
	18	*
	19	* Code inspired from libuatomic_ops-1.2, inherited in part from the
	20	* Boehm-Demers-Weiser conservative garbage collector.
	21	*/
	22
	23	#include <urcu/compiler.h>
	24	#include <urcu/system.h>
	25
36bc70a8 MD	26	#ifdef __cplusplus
	27	extern "C" {
	28	#endif
	29
58de5a4b MD	30	/* cmpxchg */
	31
	32	static inline __attribute__((always_inline))
	33	unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
	34	unsigned long _new, int len)
	35	{
	36	switch (len) {
	37	case 4:
	38	{
	39	__asm__ __volatile__ (
	40	"membar #StoreLoad \| #LoadLoad\n\t"
	41	"cas [%1],%2,%0\n\t"
	42	"membar #StoreLoad \| #StoreStore\n\t"
	43	: "+&r" (_new)
	44	: "r" (addr), "r" (old)
	45	: "memory");
	46
	47	return _new;
	48	}
	49	#if (BITS_PER_LONG == 64)
	50	case 8:
	51	{
	52	__asm__ __volatile__ (
	53	"membar #StoreLoad \| #LoadLoad\n\t"
	54	"casx [%1],%2,%0\n\t"
	55	"membar #StoreLoad \| #StoreStore\n\t"
	56	: "+&r" (_new)
	57	: "r" (addr), "r" (old)
	58	: "memory");
	59
	60	return _new;
	61	}
	62	#endif
	63	}
	64	__builtin_trap();
	65	return 0;
	66	}
	67
	68
	69	#define uatomic_cmpxchg(addr, old, _new) \
	70	((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\
	71	(unsigned long)(_new), \
	72	sizeof(*(addr))))
	73
36bc70a8 MD	74	#ifdef __cplusplus
	75	}
	76	#endif
	77
8760d94e PB	78	#include <urcu/uatomic_generic.h>
8760d94e PB	79
58de5a4b	80	#endif /* _URCU_ARCH_UATOMIC_PPC_H */