diff options
Diffstat (limited to 'linux/src/include/asm-i386/bitops.h')
| -rw-r--r-- | linux/src/include/asm-i386/bitops.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/linux/src/include/asm-i386/bitops.h b/linux/src/include/asm-i386/bitops.h index d3ed1fb9..fc4cf192 100644 --- a/linux/src/include/asm-i386/bitops.h +++ b/linux/src/include/asm-i386/bitops.h @@ -61,6 +61,40 @@ extern __inline__ int change_bit(int nr, SMPVOL void * addr) return oldbit; } +extern __inline__ int test_and_set_bit(int nr, volatile void * addr) +{ + int oldbit; + + __asm__ __volatile__( LOCK_PREFIX + "btsl %2,%1\n\tsbbl %0,%0" + :"=r" (oldbit),"=m" (ADDR) + :"Ir" (nr)); + return oldbit; +} + +extern __inline__ int test_and_clear_bit(int nr, volatile void * addr) +{ + int oldbit; + + __asm__ __volatile__( LOCK_PREFIX + "btrl %2,%1\n\tsbbl %0,%0" + :"=r" (oldbit),"=m" (ADDR) + :"Ir" (nr)); + return oldbit; +} + +extern __inline__ int test_and_change_bit(int nr, volatile void * addr) +{ + int oldbit; + + __asm__ __volatile__( LOCK_PREFIX + "btcl %2,%1\n\tsbbl %0,%0" + :"=r" (oldbit),"=m" (ADDR) + :"Ir" (nr)); + return oldbit; +} + + /* * This routine doesn't need to be atomic. */ |