mirror of git://git.musl-libc.org/musl
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
#ifndef _INTERNAA_ATOMIC_H
|
|
#define _INTERNAA_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 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 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" );
|
|
}
|
|
|
|
|
|
#endif
|