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25 lines
510 B
C
25 lines
510 B
C
#ifndef __ASM_SH_CMPXCHG_CAS_H
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#define __ASM_SH_CMPXCHG_CAS_H
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static inline unsigned long
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__cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new)
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{
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__asm__ __volatile__("cas.l %1,%0,@r0"
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: "+r"(new)
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: "r"(old), "z"(m)
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: "t", "memory" );
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return new;
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}
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static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
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{
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unsigned long old;
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do old = *m;
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while (__cmpxchg_u32(m, old, val) != old);
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return old;
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}
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#include <asm/cmpxchg-xchg.h>
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#endif /* __ASM_SH_CMPXCHG_CAS_H */
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