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| | #ifndef _INTERNAL_ATOMIC_H
#define _INTERNAL_ATOMIC_H
#include <stdint.h>
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;
}
static inline int a_ctz_l(unsigned long x)
{
long r;
__asm__( "bsf %1,%0" : "=r"(r) : "r"(x) );
return r;
}
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" );
}
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" );
}
static inline void a_store_l(volatile void *p, long x)
{
__asm__( "movl %1, %0" : "=m"(*(long *)p) : "r"(x) : "memory" );
}
static inline void a_or_l(volatile void *p, long v)
{
__asm__( "lock ; orl %1, %0"
: "=m"(*(long *)p) : "r"(v) : "memory" );
}
static inline void *a_cas_p(volatile void *p, void *t, void *s)
{
__asm__( "lock ; cmpxchg %3, %1"
: "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
return t;
}
static inline long a_cas_l(volatile void *p, long t, long s)
{
__asm__( "lock ; cmpxchg %3, %1"
: "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
return t;
}
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;
}
static inline void *a_swap_p(void *volatile *x, void *v)
{
__asm__( "xchg %0, %1" : "=r"(v), "=m"(*(void **)x) : "0"(v) : "memory" );
return v;
}
static inline long a_swap_l(volatile void *x, long v)
{
__asm__( "xchg %0, %1" : "=r"(v), "=m"(*(long *)x) : "0"(v) : "memory" );
return v;
}
static inline void a_or(volatile void *p, int v)
{
__asm__( "lock ; orl %1, %0"
: "=m"(*(int *)p) : "r"(v) : "memory" );
}
static inline void a_and(volatile void *p, int v)
{
__asm__( "lock ; andl %1, %0"
: "=m"(*(int *)p) : "r"(v) : "memory" );
}
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_xchg a_swap
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;
}
static inline void a_inc(volatile int *x)
{
__asm__( "lock ; incl %0" : "=m"(*x) : "m"(*x) : "memory" );
}
static inline void a_dec(volatile int *x)
{
__asm__( "lock ; decl %0" : "=m"(*x) : "m"(*x) : "memory" );
}
static inline void a_store(volatile int *p, int x)
{
__asm__( "movl %1, %0" : "=m"(*p) : "r"(x) : "memory" );
}
static inline void a_spin()
{
__asm__ __volatile__( "pause" : : : "memory" );
}
static inline void a_crash()
{
__asm__ __volatile__( "hlt" : : : "memory" );
}
#endif
|