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static inline void
atomic·barrier()
{
__asm__ __volatile__ ("fence rw,rw" : : : "memory");
}
static inline int
atomic·cas(volatile int *p, int t, int s)
{
int old, tmp;
__asm__ __volatile__ (
"\n1: lr.w.aqrl %0, (%2)\n"
" bne %0, %3, 1f\n"
" sc.w.aqrl %1, %4, (%2)\n"
" bnez %1, 1b\n"
"1:"
: "=&r"(old), "=&r"(tmp)
: "r"(p), "r"((long)t), "r"((long)s)
: "memory");
return old;
}
static inline void
*atomic·casp(volatile void *p, void *t, void *s)
{
void *old;
int tmp;
__asm__ __volatile__ (
"\n1: lr.d.aqrl %0, (%2)\n"
" bne %0, %3, 1f\n"
" sc.d.aqrl %1, %4, (%2)\n"
" bnez %1, 1b\n"
"1:"
: "=&r"(old), "=&r"(tmp)
: "r"(p), "r"(t), "r"(s)
: "memory");
return old;
}
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