[mirror_ubuntu-bionic-kernel.git] / arch / x86 / include / asm / atomic64_32.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_ATOMIC64_32_H
#define _ASM_X86_ATOMIC64_32_H

#include <linux/compiler.h>
#include <linux/types.h>
//#include <asm/cmpxchg.h>

/* An 64bit atomic type */

typedef struct {
	u64 __aligned(8) counter;
} atomic64_t;

#define ATOMIC64_INIT(val)	{ (val) }

#define __ATOMIC64_DECL(sym) void atomic64_##sym(atomic64_t *, ...)
#ifndef ATOMIC64_EXPORT
#define ATOMIC64_DECL_ONE __ATOMIC64_DECL
#else
#define ATOMIC64_DECL_ONE(sym) __ATOMIC64_DECL(sym); \
	ATOMIC64_EXPORT(atomic64_##sym)
#endif

#ifdef CONFIG_X86_CMPXCHG64
#define __alternative_atomic64(f, g, out, in...) \
	asm volatile("call %P[func]" \
		     : out : [func] "i" (atomic64_##g##_cx8), ## in)

#define ATOMIC64_DECL(sym) ATOMIC64_DECL_ONE(sym##_cx8)
#else
#define __alternative_atomic64(f, g, out, in...) \
	alternative_call(atomic64_##f##_386, atomic64_##g##_cx8, \
			 X86_FEATURE_CX8, ASM_OUTPUT2(out), ## in)

#define ATOMIC64_DECL(sym) ATOMIC64_DECL_ONE(sym##_cx8); \
	ATOMIC64_DECL_ONE(sym##_386)

ATOMIC64_DECL_ONE(add_386);
ATOMIC64_DECL_ONE(sub_386);
ATOMIC64_DECL_ONE(inc_386);
ATOMIC64_DECL_ONE(dec_386);
#endif

#define alternative_atomic64(f, out, in...) \
	__alternative_atomic64(f, f, ASM_OUTPUT2(out), ## in)

ATOMIC64_DECL(read);
ATOMIC64_DECL(set);
ATOMIC64_DECL(xchg);
ATOMIC64_DECL(add_return);
ATOMIC64_DECL(sub_return);
ATOMIC64_DECL(inc_return);
ATOMIC64_DECL(dec_return);
ATOMIC64_DECL(dec_if_positive);
ATOMIC64_DECL(inc_not_zero);
ATOMIC64_DECL(add_unless);

#undef ATOMIC64_DECL
#undef ATOMIC64_DECL_ONE
#undef __ATOMIC64_DECL
#undef ATOMIC64_EXPORT

/**
 * atomic64_cmpxchg - cmpxchg atomic64 variable
 * @v: pointer to type atomic64_t
 * @o: expected value
 * @n: new value
 *
 * Atomically sets @v to @n if it was equal to @o and returns
 * the old value.
 */

static inline long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n)
{
	return cmpxchg64(&v->counter, o, n);
}

/**
 * atomic64_xchg - xchg atomic64 variable
 * @v: pointer to type atomic64_t
 * @n: value to assign
 *
 * Atomically xchgs the value of @v to @n and returns
 * the old value.
 */
static inline long long atomic64_xchg(atomic64_t *v, long long n)
{
	long long o;
	unsigned high = (unsigned)(n >> 32);
	unsigned low = (unsigned)n;
	alternative_atomic64(xchg, "=&A" (o),
			     "S" (v), "b" (low), "c" (high)
			     : "memory");
	return o;
}

/**
 * atomic64_set - set atomic64 variable
 * @v: pointer to type atomic64_t
 * @i: value to assign
 *
 * Atomically sets the value of @v to @n.
 */
static inline void atomic64_set(atomic64_t *v, long long i)
{
	unsigned high = (unsigned)(i >> 32);
	unsigned low = (unsigned)i;
	alternative_atomic64(set, /* no output */,
			     "S" (v), "b" (low), "c" (high)
			     : "eax", "edx", "memory");
}

/**
 * atomic64_read - read atomic64 variable
 * @v: pointer to type atomic64_t
 *
 * Atomically reads the value of @v and returns it.
 */
static inline long long atomic64_read(const atomic64_t *v)
{
	long long r;
	alternative_atomic64(read, "=&A" (r), "c" (v) : "memory");
	return r;
 }

/**
 * atomic64_add_return - add and return
 * @i: integer value to add
 * @v: pointer to type atomic64_t
 *
 * Atomically adds @i to @v and returns @i + *@v
 */
static inline long long atomic64_add_return(long long i, atomic64_t *v)
{
	alternative_atomic64(add_return,
			     ASM_OUTPUT2("+A" (i), "+c" (v)),
			     ASM_NO_INPUT_CLOBBER("memory"));
	return i;
}

/*
 * Other variants with different arithmetic operators:
 */
static inline long long atomic64_sub_return(long long i, atomic64_t *v)
{
	alternative_atomic64(sub_return,
			     ASM_OUTPUT2("+A" (i), "+c" (v)),
			     ASM_NO_INPUT_CLOBBER("memory"));
	return i;
}

static inline long long atomic64_inc_return(atomic64_t *v)
{
	long long a;
	alternative_atomic64(inc_return, "=&A" (a),
			     "S" (v) : "memory", "ecx");
	return a;
}

static inline long long atomic64_dec_return(atomic64_t *v)
{
	long long a;
	alternative_atomic64(dec_return, "=&A" (a),
			     "S" (v) : "memory", "ecx");
	return a;
}

/**
 * atomic64_add - add integer to atomic64 variable
 * @i: integer value to add
 * @v: pointer to type atomic64_t
 *
 * Atomically adds @i to @v.
 */
static inline long long atomic64_add(long long i, atomic64_t *v)
{
	__alternative_atomic64(add, add_return,
			       ASM_OUTPUT2("+A" (i), "+c" (v)),
			       ASM_NO_INPUT_CLOBBER("memory"));
	return i;
}

/**
 * atomic64_sub - subtract the atomic64 variable
 * @i: integer value to subtract
 * @v: pointer to type atomic64_t
 *
 * Atomically subtracts @i from @v.
 */
static inline long long atomic64_sub(long long i, atomic64_t *v)
{
	__alternative_atomic64(sub, sub_return,
			       ASM_OUTPUT2("+A" (i), "+c" (v)),
			       ASM_NO_INPUT_CLOBBER("memory"));
	return i;
}

/**
 * atomic64_sub_and_test - subtract value from variable and test result
 * @i: integer value to subtract
 * @v: pointer to type atomic64_t
 *
 * Atomically subtracts @i from @v and returns
 * true if the result is zero, or false for all
 * other cases.
 */
static inline int atomic64_sub_and_test(long long i, atomic64_t *v)
{
	return atomic64_sub_return(i, v) == 0;
}

/**
 * atomic64_inc - increment atomic64 variable
 * @v: pointer to type atomic64_t
 *
 * Atomically increments @v by 1.
 */
static inline void atomic64_inc(atomic64_t *v)
{
	__alternative_atomic64(inc, inc_return, /* no output */,
			       "S" (v) : "memory", "eax", "ecx", "edx");
}

/**
 * atomic64_dec - decrement atomic64 variable
 * @v: pointer to type atomic64_t
 *
 * Atomically decrements @v by 1.
 */
static inline void atomic64_dec(atomic64_t *v)
{
	__alternative_atomic64(dec, dec_return, /* no output */,
			       "S" (v) : "memory", "eax", "ecx", "edx");
}

/**
 * atomic64_dec_and_test - decrement and test
 * @v: pointer to type atomic64_t
 *
 * Atomically decrements @v by 1 and
 * returns true if the result is 0, or false for all other
 * cases.
 */
static inline int atomic64_dec_and_test(atomic64_t *v)
{
	return atomic64_dec_return(v) == 0;
}

/**
 * atomic64_inc_and_test - increment and test
 * @v: pointer to type atomic64_t
 *
 * Atomically increments @v by 1
 * and returns true if the result is zero, or false for all
 * other cases.
 */
static inline int atomic64_inc_and_test(atomic64_t *v)
{
	return atomic64_inc_return(v) == 0;
}

/**
 * atomic64_add_negative - add and test if negative
 * @i: integer value to add
 * @v: pointer to type atomic64_t
 *
 * Atomically adds @i to @v and returns true
 * if the result is negative, or false when
 * result is greater than or equal to zero.
 */
static inline int atomic64_add_negative(long long i, atomic64_t *v)
{
	return atomic64_add_return(i, v) < 0;
}

/**
 * atomic64_add_unless - add unless the number is a given value
 * @v: pointer of type atomic64_t
 * @a: the amount to add to v...
 * @u: ...unless v is equal to u.
 *
 * Atomically adds @a to @v, so long as it was not @u.
 * Returns non-zero if the add was done, zero otherwise.
 */
static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u)
{
	unsigned low = (unsigned)u;
	unsigned high = (unsigned)(u >> 32);
	alternative_atomic64(add_unless,
			     ASM_OUTPUT2("+A" (a), "+c" (low), "+D" (high)),
			     "S" (v) : "memory");
	return (int)a;
}


static inline int atomic64_inc_not_zero(atomic64_t *v)
{
	int r;
	alternative_atomic64(inc_not_zero, "=&a" (r),
			     "S" (v) : "ecx", "edx", "memory");
	return r;
}

static inline long long atomic64_dec_if_positive(atomic64_t *v)
{
	long long r;
	alternative_atomic64(dec_if_positive, "=&A" (r),
			     "S" (v) : "ecx", "memory");
	return r;
}

#undef alternative_atomic64
#undef __alternative_atomic64

static inline void atomic64_and(long long i, atomic64_t *v)
{
	long long old, c = 0;

	while ((old = atomic64_cmpxchg(v, c, c & i)) != c)
		c = old;
}

static inline long long atomic64_fetch_and(long long i, atomic64_t *v)
{
	long long old, c = 0;

	while ((old = atomic64_cmpxchg(v, c, c & i)) != c)
		c = old;

	return old;
}

static inline void atomic64_or(long long i, atomic64_t *v)
{
	long long old, c = 0;

	while ((old = atomic64_cmpxchg(v, c, c | i)) != c)
		c = old;
}

static inline long long atomic64_fetch_or(long long i, atomic64_t *v)
{
	long long old, c = 0;

	while ((old = atomic64_cmpxchg(v, c, c | i)) != c)
		c = old;

	return old;
}

static inline void atomic64_xor(long long i, atomic64_t *v)
{
	long long old, c = 0;

	while ((old = atomic64_cmpxchg(v, c, c ^ i)) != c)
		c = old;
}

static inline long long atomic64_fetch_xor(long long i, atomic64_t *v)
{
	long long old, c = 0;

	while ((old = atomic64_cmpxchg(v, c, c ^ i)) != c)
		c = old;

	return old;
}

static inline long long atomic64_fetch_add(long long i, atomic64_t *v)
{
	long long old, c = 0;

	while ((old = atomic64_cmpxchg(v, c, c + i)) != c)
		c = old;

	return old;
}

#define atomic64_fetch_sub(i, v)	atomic64_fetch_add(-(i), (v))

#endif /* _ASM_X86_ATOMIC64_32_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1a3b1d89 BG	2	#ifndef _ASM_X86_ATOMIC64_32_H
	3	#define _ASM_X86_ATOMIC64_32_H
	4
	5	#include <linux/compiler.h>
	6	#include <linux/types.h>
1a3b1d89 BG	7	//#include <asm/cmpxchg.h>
	8
	9	/* An 64bit atomic type */
	10
	11	typedef struct {
	12	u64 __aligned(8) counter;
	13	} atomic64_t;
	14
	15	#define ATOMIC64_INIT(val) { (val) }
	16
819165fb JB	17	#define __ATOMIC64_DECL(sym) void atomic64_##sym(atomic64_t *, ...)
	18	#ifndef ATOMIC64_EXPORT
	19	#define ATOMIC64_DECL_ONE __ATOMIC64_DECL
	20	#else
	21	#define ATOMIC64_DECL_ONE(sym) __ATOMIC64_DECL(sym); \
	22	ATOMIC64_EXPORT(atomic64_##sym)
	23	#endif
	24
a7e926ab	25	#ifdef CONFIG_X86_CMPXCHG64
819165fb JB	26	#define __alternative_atomic64(f, g, out, in...) \
	27	asm volatile("call %P[func]" \
	28	: out : [func] "i" (atomic64_##g##_cx8), ## in)
	29
	30	#define ATOMIC64_DECL(sym) ATOMIC64_DECL_ONE(sym##_cx8)
a7e926ab	31	#else
819165fb JB	32	#define __alternative_atomic64(f, g, out, in...) \
	33	alternative_call(atomic64_##f##_386, atomic64_##g##_cx8, \
	34	X86_FEATURE_CX8, ASM_OUTPUT2(out), ## in)
	35
	36	#define ATOMIC64_DECL(sym) ATOMIC64_DECL_ONE(sym##_cx8); \
	37	ATOMIC64_DECL_ONE(sym##_386)
	38
	39	ATOMIC64_DECL_ONE(add_386);
	40	ATOMIC64_DECL_ONE(sub_386);
	41	ATOMIC64_DECL_ONE(inc_386);
	42	ATOMIC64_DECL_ONE(dec_386);
a7e926ab LB	43	#endif
a7e926ab LB	44
819165fb JB	45	#define alternative_atomic64(f, out, in...) \
	46	__alternative_atomic64(f, f, ASM_OUTPUT2(out), ## in)
	47
	48	ATOMIC64_DECL(read);
	49	ATOMIC64_DECL(set);
	50	ATOMIC64_DECL(xchg);
	51	ATOMIC64_DECL(add_return);
	52	ATOMIC64_DECL(sub_return);
	53	ATOMIC64_DECL(inc_return);
	54	ATOMIC64_DECL(dec_return);
	55	ATOMIC64_DECL(dec_if_positive);
	56	ATOMIC64_DECL(inc_not_zero);
	57	ATOMIC64_DECL(add_unless);
	58
	59	#undef ATOMIC64_DECL
	60	#undef ATOMIC64_DECL_ONE
	61	#undef __ATOMIC64_DECL
	62	#undef ATOMIC64_EXPORT
a7e926ab LB	63
	64	/**
	65	* atomic64_cmpxchg - cmpxchg atomic64 variable
1f045978	66	* @v: pointer to type atomic64_t
a7e926ab LB	67	* @o: expected value
	68	* @n: new value
	69	*
	70	* Atomically sets @v to @n if it was equal to @o and returns
	71	* the old value.
	72	*/
	73
	74	static inline long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n)
	75	{
	76	return cmpxchg64(&v->counter, o, n);
	77	}
1a3b1d89 BG	78
	79	/**
	80	* atomic64_xchg - xchg atomic64 variable
a7e926ab LB	81	* @v: pointer to type atomic64_t
a7e926ab LB	82	* @n: value to assign
1a3b1d89	83	*
a7e926ab	84	* Atomically xchgs the value of @v to @n and returns
1a3b1d89 BG	85	* the old value.
1a3b1d89 BG	86	*/
a7e926ab LB	87	static inline long long atomic64_xchg(atomic64_t *v, long long n)
	88	{
	89	long long o;
	90	unsigned high = (unsigned)(n >> 32);
	91	unsigned low = (unsigned)n;
819165fb JB	92	alternative_atomic64(xchg, "=&A" (o),
	93	"S" (v), "b" (low), "c" (high)
	94	: "memory");
a7e926ab LB	95	return o;
a7e926ab LB	96	}
1a3b1d89 BG	97
	98	/**
	99	* atomic64_set - set atomic64 variable
a7e926ab	100	* @v: pointer to type atomic64_t
1f045978	101	* @i: value to assign
1a3b1d89	102	*
a7e926ab	103	* Atomically sets the value of @v to @n.
1a3b1d89	104	*/
a7e926ab LB	105	static inline void atomic64_set(atomic64_t *v, long long i)
	106	{
	107	unsigned high = (unsigned)(i >> 32);
	108	unsigned low = (unsigned)i;
819165fb JB	109	alternative_atomic64(set, /* no output */,
	110	"S" (v), "b" (low), "c" (high)
	111	: "eax", "edx", "memory");
a7e926ab	112	}
1a3b1d89 BG	113
	114	/**
	115	* atomic64_read - read atomic64 variable
a7e926ab	116	* @v: pointer to type atomic64_t
1a3b1d89	117	*
a7e926ab	118	* Atomically reads the value of @v and returns it.
1a3b1d89	119	*/
8030c36d	120	static inline long long atomic64_read(const atomic64_t *v)
1a3b1d89	121	{
a7e926ab	122	long long r;
819165fb	123	alternative_atomic64(read, "=&A" (r), "c" (v) : "memory");
a7e926ab LB	124	return r;
a7e926ab LB	125	}
1a3b1d89 BG	126
	127	/**
	128	* atomic64_add_return - add and return
a7e926ab LB	129	* @i: integer value to add
a7e926ab LB	130	* @v: pointer to type atomic64_t
1a3b1d89	131	*
a7e926ab	132	* Atomically adds @i to @v and returns @i + *@v
1a3b1d89	133	*/
a7e926ab LB	134	static inline long long atomic64_add_return(long long i, atomic64_t *v)
a7e926ab LB	135	{
819165fb JB	136	alternative_atomic64(add_return,
	137	ASM_OUTPUT2("+A" (i), "+c" (v)),
	138	ASM_NO_INPUT_CLOBBER("memory"));
a7e926ab LB	139	return i;
a7e926ab LB	140	}
1a3b1d89 BG	141
	142	/*
	143	* Other variants with different arithmetic operators:
	144	*/
a7e926ab LB	145	static inline long long atomic64_sub_return(long long i, atomic64_t *v)
a7e926ab LB	146	{
819165fb JB	147	alternative_atomic64(sub_return,
	148	ASM_OUTPUT2("+A" (i), "+c" (v)),
	149	ASM_NO_INPUT_CLOBBER("memory"));
a7e926ab LB	150	return i;
	151	}
	152
	153	static inline long long atomic64_inc_return(atomic64_t *v)
	154	{
	155	long long a;
819165fb JB	156	alternative_atomic64(inc_return, "=&A" (a),
819165fb JB	157	"S" (v) : "memory", "ecx");
a7e926ab LB	158	return a;
	159	}
	160
	161	static inline long long atomic64_dec_return(atomic64_t *v)
	162	{
	163	long long a;
819165fb JB	164	alternative_atomic64(dec_return, "=&A" (a),
819165fb JB	165	"S" (v) : "memory", "ecx");
a7e926ab LB	166	return a;
a7e926ab LB	167	}
1a3b1d89 BG	168
	169	/**
	170	* atomic64_add - add integer to atomic64 variable
a7e926ab LB	171	* @i: integer value to add
a7e926ab LB	172	* @v: pointer to type atomic64_t
1a3b1d89	173	*
a7e926ab	174	* Atomically adds @i to @v.
1a3b1d89	175	*/
a7e926ab LB	176	static inline long long atomic64_add(long long i, atomic64_t *v)
a7e926ab LB	177	{
819165fb JB	178	__alternative_atomic64(add, add_return,
	179	ASM_OUTPUT2("+A" (i), "+c" (v)),
	180	ASM_NO_INPUT_CLOBBER("memory"));
a7e926ab LB	181	return i;
a7e926ab LB	182	}
1a3b1d89 BG	183
	184	/**
	185	* atomic64_sub - subtract the atomic64 variable
a7e926ab LB	186	* @i: integer value to subtract
a7e926ab LB	187	* @v: pointer to type atomic64_t
1a3b1d89	188	*
a7e926ab	189	* Atomically subtracts @i from @v.
1a3b1d89	190	*/
a7e926ab LB	191	static inline long long atomic64_sub(long long i, atomic64_t *v)
a7e926ab LB	192	{
819165fb JB	193	__alternative_atomic64(sub, sub_return,
	194	ASM_OUTPUT2("+A" (i), "+c" (v)),
	195	ASM_NO_INPUT_CLOBBER("memory"));
a7e926ab LB	196	return i;
a7e926ab LB	197	}
1a3b1d89 BG	198
	199	/**
	200	* atomic64_sub_and_test - subtract value from variable and test result
a7e926ab LB	201	* @i: integer value to subtract
a7e926ab LB	202	* @v: pointer to type atomic64_t
1f045978	203	*
a7e926ab	204	* Atomically subtracts @i from @v and returns
1a3b1d89 BG	205	* true if the result is zero, or false for all
	206	* other cases.
	207	*/
a7e926ab LB	208	static inline int atomic64_sub_and_test(long long i, atomic64_t *v)
	209	{
	210	return atomic64_sub_return(i, v) == 0;
	211	}
1a3b1d89 BG	212
	213	/**
	214	* atomic64_inc - increment atomic64 variable
a7e926ab	215	* @v: pointer to type atomic64_t
1a3b1d89	216	*
a7e926ab	217	* Atomically increments @v by 1.
1a3b1d89	218	*/
a7e926ab LB	219	static inline void atomic64_inc(atomic64_t *v)
a7e926ab LB	220	{
819165fb JB	221	__alternative_atomic64(inc, inc_return, /* no output */,
819165fb JB	222	"S" (v) : "memory", "eax", "ecx", "edx");
a7e926ab	223	}
1a3b1d89 BG	224
	225	/**
	226	* atomic64_dec - decrement atomic64 variable
1f045978	227	* @v: pointer to type atomic64_t
1a3b1d89	228	*
1f045978	229	* Atomically decrements @v by 1.
1a3b1d89	230	*/
a7e926ab LB	231	static inline void atomic64_dec(atomic64_t *v)
a7e926ab LB	232	{
819165fb JB	233	__alternative_atomic64(dec, dec_return, /* no output */,
819165fb JB	234	"S" (v) : "memory", "eax", "ecx", "edx");
a7e926ab	235	}
1a3b1d89 BG	236
	237	/**
	238	* atomic64_dec_and_test - decrement and test
a7e926ab	239	* @v: pointer to type atomic64_t
1a3b1d89	240	*
a7e926ab	241	* Atomically decrements @v by 1 and
1a3b1d89 BG	242	* returns true if the result is 0, or false for all other
	243	* cases.
	244	*/
a7e926ab LB	245	static inline int atomic64_dec_and_test(atomic64_t *v)
	246	{
	247	return atomic64_dec_return(v) == 0;
	248	}
1a3b1d89 BG	249
	250	/**
	251	* atomic64_inc_and_test - increment and test
a7e926ab	252	* @v: pointer to type atomic64_t
1a3b1d89	253	*
a7e926ab	254	* Atomically increments @v by 1
1a3b1d89 BG	255	* and returns true if the result is zero, or false for all
	256	* other cases.
	257	*/
a7e926ab LB	258	static inline int atomic64_inc_and_test(atomic64_t *v)
	259	{
	260	return atomic64_inc_return(v) == 0;
	261	}
1a3b1d89 BG	262
	263	/**
	264	* atomic64_add_negative - add and test if negative
a7e926ab LB	265	* @i: integer value to add
a7e926ab LB	266	* @v: pointer to type atomic64_t
1a3b1d89	267	*
a7e926ab	268	* Atomically adds @i to @v and returns true
1a3b1d89 BG	269	* if the result is negative, or false when
	270	* result is greater than or equal to zero.
	271	*/
a7e926ab LB	272	static inline int atomic64_add_negative(long long i, atomic64_t *v)
	273	{
	274	return atomic64_add_return(i, v) < 0;
	275	}
	276
	277	/**
	278	* atomic64_add_unless - add unless the number is a given value
	279	* @v: pointer of type atomic64_t
	280	* @a: the amount to add to v...
	281	* @u: ...unless v is equal to u.
	282	*
	283	* Atomically adds @a to @v, so long as it was not @u.
819165fb	284	* Returns non-zero if the add was done, zero otherwise.
a7e926ab LB	285	*/
	286	static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u)
	287	{
	288	unsigned low = (unsigned)u;
	289	unsigned high = (unsigned)(u >> 32);
819165fb	290	alternative_atomic64(add_unless,
cb8095bb JB	291	ASM_OUTPUT2("+A" (a), "+c" (low), "+D" (high)),
cb8095bb JB	292	"S" (v) : "memory");
a7e926ab LB	293	return (int)a;
	294	}
	295
	296
	297	static inline int atomic64_inc_not_zero(atomic64_t *v)
	298	{
	299	int r;
819165fb JB	300	alternative_atomic64(inc_not_zero, "=&a" (r),
819165fb JB	301	"S" (v) : "ecx", "edx", "memory");
a7e926ab LB	302	return r;
	303	}
	304
	305	static inline long long atomic64_dec_if_positive(atomic64_t *v)
	306	{
	307	long long r;
819165fb JB	308	alternative_atomic64(dec_if_positive, "=&A" (r),
819165fb JB	309	"S" (v) : "ecx", "memory");
a7e926ab LB	310	return r;
	311	}
	312
819165fb JB	313	#undef alternative_atomic64
819165fb JB	314	#undef __alternative_atomic64
1a3b1d89	315
ba1c9f83 DV	316	static inline void atomic64_and(long long i, atomic64_t *v)
	317	{
	318	long long old, c = 0;
	319
	320	while ((old = atomic64_cmpxchg(v, c, c & i)) != c)
	321	c = old;
7fc1845d PZ	322	}
7fc1845d PZ	323
ba1c9f83 DV	324	static inline long long atomic64_fetch_and(long long i, atomic64_t *v)
	325	{
	326	long long old, c = 0;
	327
	328	while ((old = atomic64_cmpxchg(v, c, c & i)) != c)
	329	c = old;
	330
	331	return old;
a8bcccab PZ	332	}
a8bcccab PZ	333
ba1c9f83 DV	334	static inline void atomic64_or(long long i, atomic64_t *v)
	335	{
	336	long long old, c = 0;
a8bcccab	337
ba1c9f83 DV	338	while ((old = atomic64_cmpxchg(v, c, c \| i)) != c)
	339	c = old;
	340	}
	341
	342	static inline long long atomic64_fetch_or(long long i, atomic64_t *v)
	343	{
	344	long long old, c = 0;
	345
	346	while ((old = atomic64_cmpxchg(v, c, c \| i)) != c)
	347	c = old;
	348
	349	return old;
	350	}
a8bcccab	351
ba1c9f83 DV	352	static inline void atomic64_xor(long long i, atomic64_t *v)
	353	{
	354	long long old, c = 0;
	355
	356	while ((old = atomic64_cmpxchg(v, c, c ^ i)) != c)
	357	c = old;
	358	}
a8bcccab	359
ba1c9f83 DV	360	static inline long long atomic64_fetch_xor(long long i, atomic64_t *v)
	361	{
	362	long long old, c = 0;
	363
	364	while ((old = atomic64_cmpxchg(v, c, c ^ i)) != c)
	365	c = old;
	366
	367	return old;
	368	}
7fc1845d	369
ba1c9f83 DV	370	static inline long long atomic64_fetch_add(long long i, atomic64_t *v)
	371	{
	372	long long old, c = 0;
	373
	374	while ((old = atomic64_cmpxchg(v, c, c + i)) != c)
	375	c = old;
	376
	377	return old;
	378	}
	379
	380	#define atomic64_fetch_sub(i, v) atomic64_fetch_add(-(i), (v))
7fc1845d	381
1a3b1d89	382	#endif /* _ASM_X86_ATOMIC64_32_H */