musl/arch/or1k/atomic_arch.h

15 lines
297 B
C

#define a_cas a_cas
static inline int a_cas(volatile int *p, int t, int s)
{
__asm__("1: l.lwa %0, %1\n"
" l.sfeq %0, %2\n"
" l.bnf 1f\n"
" l.nop\n"
" l.swa %1, %3\n"
" l.bnf 1b\n"
" l.nop\n"
"1: \n"
: "=&r"(t), "+m"(*p) : "r"(t), "r"(s) : "cc", "memory" );
return t;
}