1 #ifndef __ASM_SH_CMPXCHG_CAS_H
2 #define __ASM_SH_CMPXCHG_CAS_H
3
4 static inline unsigned long
__cmpxchg_u32(volatile u32 * m,unsigned long old,unsigned long new)5 __cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new)
6 {
7 __asm__ __volatile__("cas.l %1,%0,@r0"
8 : "+r"(new)
9 : "r"(old), "z"(m)
10 : "t", "memory" );
11 return new;
12 }
13
xchg_u32(volatile u32 * m,unsigned long val)14 static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
15 {
16 unsigned long old;
17 do old = *m;
18 while (__cmpxchg_u32(m, old, val) != old);
19 return old;
20 }
21
22 #include <asm/cmpxchg-xchg.h>
23
24 #endif /* __ASM_SH_CMPXCHG_CAS_H */
25