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| | #define a_ll a_ll
static inline int a_ll(volatile int *p)
{
int v;
__asm__ __volatile__ ("lwarx %0, 0, %2" : "=r"(v) : "m"(*p), "r"(p));
return v;
}
#define a_sc a_sc
static inline int a_sc(volatile int *p, int v)
{
int r;
__asm__ __volatile__ (
"stwcx. %2, 0, %3 ; mfcr %0"
: "=r"(r), "=m"(*p) : "r"(v), "r"(p) : "memory", "cc");
return r & 0x20000000; /* "bit 2" of "cr0" (backwards bit order) */
}
#define a_ll_p a_ll_p
static inline void *a_ll_p(volatile void *p)
{
void *v;
__asm__ __volatile__ ("ldarx %0, 0, %2" : "=r"(v) : "m"(*(void *volatile *)p), "r"(p));
return v;
}
#define a_sc_p a_sc_p
static inline int a_sc_p(volatile void *p, void *v)
{
int r;
__asm__ __volatile__ (
"stdcx. %2, 0, %3 ; mfcr %0"
: "=r"(r), "=m"(*(void *volatile *)p) : "r"(v), "r"(p) : "memory", "cc");
return r & 0x20000000; /* "bit 2" of "cr0" (backwards bit order) */
}
#define a_barrier a_barrier
static inline void a_barrier()
{
__asm__ __volatile__ ("sync" : : : "memory");
}
#define a_pre_llsc a_barrier
#define a_post_llsc a_post_llsc
static inline void a_post_llsc()
{
__asm__ __volatile__ ("isync" : : : "memory");
}
#define a_store a_store
static inline void a_store(volatile int *p, int v)
{
a_pre_llsc();
*p = v;
a_post_llsc();
}
#define a_crash a_crash
static inline void a_crash()
{
__asm__ __volatile__ (".long 0");
}
|