mirror of https://git.musl-libc.org/git/musl
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
21 lines
438 B
21 lines
438 B
#define a_barrier a_barrier
|
|
static inline void a_barrier()
|
|
{
|
|
__asm__ __volatile__ ("fence rw,rw" : : : "memory");
|
|
}
|
|
|
|
#define a_cas a_cas
|
|
static inline int a_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;
|
|
}
|
|
|