github.com/afumu/libc@v0.0.6/musl/arch/m68k/atomic_arch.h (about)

     1  #define a_cas a_cas
     2  static inline int a_cas(volatile int *p, int t, int s)
     3  {
     4  	__asm__ __volatile__ (
     5  		"cas.l %0, %2, (%1)"
     6  		: "+d"(t) : "a"(p), "d"(s) : "memory", "cc");
     7  	return t;
     8  }