atomics/arc: Define atomic64_fetch_add_unless()

}

/**

 * atomic64_add_unless - add unless the number is a given value

 * atomic64_fetch_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.

 *

 * if (v != u) { v += a; ret = 1} else {ret = 0}

 * Returns 1 iff @v was not @u (i.e. if add actually happened)

 * Atomically adds @a to @v, if it was not @u.

 * Returns the old value of @v

 */

static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u)

static inline long long atomic64_fetch_add_unless(atomic64_t *v, long long a,

						  long long u)

{

	long long val;

	int op_done;

	long long old, temp;

	smp_mb();

	__asm__ __volatile__(

	"1:	llockd  %0, [%2]	\n"

	"	mov	%1, 1		\n"

	"	brne	%L0, %L4, 2f	# continue to add since v != u \n"

	"	breq.d	%H0, %H4, 3f	# return since v == u \n"

	"	mov	%1, 0		\n"

	"2:				\n"

	"	add.f   %L0, %L0, %L3	\n"

	"	adc     %H0, %H0, %H3	\n"

	"	scondd  %0, [%2]	\n"

	"	add.f   %L1, %L0, %L3	\n"

	"	adc     %H1, %H0, %H3	\n"

	"	scondd  %1, [%2]	\n"

	"	bnz     1b		\n"

	"3:				\n"

	: "=&r"(val), "=&r" (op_done)

	: "=&r"(old), "=&r" (temp)

	: "r"(&v->counter), "r"(a), "r"(u)

	: "cc");	/* memory clobber comes from smp_mb() */

	smp_mb();

	return op_done;

	return old;

}

#define atomic64_fetch_add_unless atomic64_fetch_add_unless

#define atomic64_add_negative(a, v)	(atomic64_add_return((a), (v)) < 0)

#define atomic64_inc(v)			atomic64_add(1LL, (v))