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| | #define a_barrier a_barrier
static inline void a_barrier()
{
__asm__ __volatile__ ("fence rw,rw" : : : "memory");
}
#define a_ll a_ll
static inline int a_ll(volatile int *p)
{
int v;
__asm__ __volatile__ ("lr.w %0, (%1)" : "=&r"(v) : "r"(p));
return v;
}
#define a_sc a_sc
static inline int a_sc(volatile int *p, int v)
{
int r;
__asm__ __volatile__ ("sc.w %0, %2, (%1)" : "=&r"(r) : "r"(p), "r"(v) : "memory");
return !r;
}
#define a_cas a_cas
static inline int a_cas(volatile int *p, int t, int s)
{
int old, tmp;
__asm__("1: lr.w %0, %2 \n"
" bne %0, %3, 1f \n"
" sc.w %1, %4, %2 \n"
" bnez %1, 1b \n"
"1: \n"
: "=&r"(old), "+r"(tmp), "+A"(*p)
: "r"(t), "r"(s));
return old;
}
|