[urcu.git] / include / urcu / uatomic / sparc64.h

// SPDX-FileCopyrightText: 1991-1994 by Xerox Corporation.  All rights reserved.
// SPDX-FileCopyrightText: 1996-1999 by Silicon Graphics.  All rights reserved.
// SPDX-FileCopyrightText: 1999-2003 Hewlett-Packard Development Company, L.P.
// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
//
// SPDX-License-Identifier: LicenseRef-Boehm-GC

#ifndef _URCU_ARCH_UATOMIC_SPARC64_H
#define _URCU_ARCH_UATOMIC_SPARC64_H

/*
 * 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 (CAA_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),			       \
						caa_cast_long_keep_sign(old),  \
						caa_cast_long_keep_sign(_new), \
						sizeof(*(addr))))

#ifdef __cplusplus
}
#endif

#include <urcu/uatomic/generic.h>

#endif /* _URCU_ARCH_UATOMIC_PPC_H */
Commit	Line	Data
	1	// SPDX-FileCopyrightText: 1991-1994 by Xerox Corporation. All rights reserved.
	2	// SPDX-FileCopyrightText: 1996-1999 by Silicon Graphics. All rights reserved.
	3	// SPDX-FileCopyrightText: 1999-2003 Hewlett-Packard Development Company, L.P.
	4	// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	5	//
	6	// SPDX-License-Identifier: LicenseRef-Boehm-GC
	7
	8	#ifndef _URCU_ARCH_UATOMIC_SPARC64_H
	9	#define _URCU_ARCH_UATOMIC_SPARC64_H
	10
	11	/*
	12	* Code inspired from libuatomic_ops-1.2, inherited in part from the
	13	* Boehm-Demers-Weiser conservative garbage collector.
	14	*/
	15
	16	#include <urcu/compiler.h>
	17	#include <urcu/system.h>
	18
	19	#ifdef __cplusplus
	20	extern "C" {
	21	#endif
	22
	23	/* cmpxchg */
	24
	25	static inline __attribute__((always_inline))
	26	unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
	27	unsigned long _new, int len)
	28	{
	29	switch (len) {
	30	case 4:
	31	{
	32	__asm__ __volatile__ (
	33	"membar #StoreLoad \| #LoadLoad\n\t"
	34	"cas [%1],%2,%0\n\t"
	35	"membar #StoreLoad \| #StoreStore\n\t"
	36	: "+&r" (_new)
	37	: "r" (addr), "r" (old)
	38	: "memory");
	39
	40	return _new;
	41	}
	42	#if (CAA_BITS_PER_LONG == 64)
	43	case 8:
	44	{
	45	__asm__ __volatile__ (
	46	"membar #StoreLoad \| #LoadLoad\n\t"
	47	"casx [%1],%2,%0\n\t"
	48	"membar #StoreLoad \| #StoreStore\n\t"
	49	: "+&r" (_new)
	50	: "r" (addr), "r" (old)
	51	: "memory");
	52
	53	return _new;
	54	}
	55	#endif
	56	}
	57	__builtin_trap();
	58	return 0;
	59	}
	60
	61
	62	#define uatomic_cmpxchg(addr, old, _new) \
	63	((__typeof__(*(addr))) _uatomic_cmpxchg((addr), \
	64	caa_cast_long_keep_sign(old), \
	65	caa_cast_long_keep_sign(_new), \
	66	sizeof(*(addr))))
	67
	68	#ifdef __cplusplus
	69	}
	70	#endif
	71
	72	#include <urcu/uatomic/generic.h>
	73
	74	#endif /* _URCU_ARCH_UATOMIC_PPC_H */