diff options
Diffstat (limited to 'include/asm-i386/atomic.h')
| -rw-r--r-- | include/asm-i386/atomic.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-i386/atomic.h b/include/asm-i386/atomic.h index 6346f91d1..0112f9b35 100644 --- a/include/asm-i386/atomic.h +++ b/include/asm-i386/atomic.h @@ -46,6 +46,17 @@ static __inline__ void atomic_sub(int i, volatile atomic_t *v) :"ir" (i), "m" (__atomic_fool_gcc(v))); } +static __inline__ int atomic_sub_and_test(int i, volatile atomic_t *v) +{ + unsigned char c; + + __asm__ __volatile__( + LOCK "subl %2,%0; sete %1" + :"=m" (__atomic_fool_gcc(v)), "=qm" (c) + :"ir" (i), "m" (__atomic_fool_gcc(v))); + return c; +} + static __inline__ void atomic_inc(volatile atomic_t *v) { __asm__ __volatile__( |