diff options
Diffstat (limited to 'arch/i386/atomic_arch.h')
-rw-r--r-- | arch/i386/atomic_arch.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/i386/atomic_arch.h b/arch/i386/atomic_arch.h new file mode 100644 index 00000000..5de862ed --- /dev/null +++ b/arch/i386/atomic_arch.h @@ -0,0 +1,109 @@ +#define a_ctz_64 a_ctz_64 +static inline int a_ctz_64(uint64_t x) +{ + int r; + __asm__( "bsf %1,%0 ; jnz 1f ; bsf %2,%0 ; addl $32,%0\n1:" + : "=&r"(r) : "r"((unsigned)x), "r"((unsigned)(x>>32)) ); + return r; +} + +#define a_ctz_l a_ctz_l +static inline int a_ctz_l(unsigned long x) +{ + long r; + __asm__( "bsf %1,%0" : "=r"(r) : "r"(x) ); + return r; +} + +#define a_and_64 a_and_64 +static inline void a_and_64(volatile uint64_t *p, uint64_t v) +{ + __asm__( "lock ; andl %1, (%0) ; lock ; andl %2, 4(%0)" + : : "r"((long *)p), "r"((unsigned)v), "r"((unsigned)(v>>32)) : "memory" ); +} + +#define a_or_64 a_or_64 +static inline void a_or_64(volatile uint64_t *p, uint64_t v) +{ + __asm__( "lock ; orl %1, (%0) ; lock ; orl %2, 4(%0)" + : : "r"((long *)p), "r"((unsigned)v), "r"((unsigned)(v>>32)) : "memory" ); +} + +#define a_or_l a_or_l +static inline void a_or_l(volatile void *p, long v) +{ + __asm__( "lock ; orl %1, %0" + : "=m"(*(long *)p) : "r"(v) : "memory" ); +} + +#define a_cas a_cas +static inline int a_cas(volatile int *p, int t, int s) +{ + __asm__( "lock ; cmpxchg %3, %1" + : "=a"(t), "=m"(*p) : "a"(t), "r"(s) : "memory" ); + return t; +} + +#define a_or a_or +static inline void a_or(volatile int *p, int v) +{ + __asm__( "lock ; orl %1, %0" + : "=m"(*p) : "r"(v) : "memory" ); +} + +#define a_and a_and +static inline void a_and(volatile int *p, int v) +{ + __asm__( "lock ; andl %1, %0" + : "=m"(*p) : "r"(v) : "memory" ); +} + +#define a_swap a_swap +static inline int a_swap(volatile int *x, int v) +{ + __asm__( "xchg %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" ); + return v; +} + +#define a_fetch_add a_fetch_add +static inline int a_fetch_add(volatile int *x, int v) +{ + __asm__( "lock ; xadd %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" ); + return v; +} + +#define a_inc a_inc +static inline void a_inc(volatile int *x) +{ + __asm__( "lock ; incl %0" : "=m"(*x) : "m"(*x) : "memory" ); +} + +#define a_dec a_dec +static inline void a_dec(volatile int *x) +{ + __asm__( "lock ; decl %0" : "=m"(*x) : "m"(*x) : "memory" ); +} + +#define a_store a_store +static inline void a_store(volatile int *p, int x) +{ + __asm__( "movl %1, %0 ; lock ; orl $0,(%%esp)" : "=m"(*p) : "r"(x) : "memory" ); +} + +#define a_spin a_spin +static inline void a_spin() +{ + __asm__ __volatile__( "pause" : : : "memory" ); +} + +#define a_barrier a_barrier +static inline void a_barrier() +{ + __asm__ __volatile__( "" : : : "memory" ); +} + +#define a_crash a_crash +static inline void a_crash() +{ + __asm__ __volatile__( "hlt" : : : "memory" ); +} |