include/asm/atomic.h

5  * version 2.  This program is licensed "as is" without any warranty of any
14 /* Atomically perform op with v->counter and i */
22 		"	l." #op " %0,%0,%2	\n"			\
27 		: "r"(&v->counter), "r"(i)				\
31 /* Atomically perform op with v->counter and i, return the result */
39 		"	l." #op " %0,%0,%2	\n"			\
44 		: "r"(&v->counter), "r"(i)				\
50 /* Atomically perform op with v->counter and i, return orig v->counter */
57 		"1:	l.lwa	%0,0(%2)	\n"			\
59 		"	l.swa	0(%2),%1	\n"			\
63 		: "r"(&v->counter), "r"(i)				\
102  * Atomically add a to v->counter as long as v is not already u.  in ATOMIC_OP_RETURN()
103  * Returns the original value at v->counter.  in ATOMIC_OP_RETURN()
112 		"1:	l.lwa %0, 0(%2)		\n"  in ATOMIC_OP_RETURN()
114 		"	l.bf 2f			\n"  in ATOMIC_OP_RETURN()
116 		"	l.swa 0(%2), %1		\n"  in ATOMIC_OP_RETURN()
119 		"2:				\n"  in ATOMIC_OP_RETURN()
121 		: "r"(&v->counter), "r"(a), "r"(u)  in ATOMIC_OP_RETURN()
128 #define arch_atomic_read(v)		READ_ONCE((v)->counter)
129 #define arch_atomic_set(v,i)		WRITE_ONCE((v)->counter, (i))