54 #  define XCHG_M_R(_addr,_lval) \  argument
58         : /*in*/  "m"(_addr) \
61 #  define XCHG_M_R_with_redundant_LOCK(_addr,_lval) \  argument
65         : /*in*/  "m"(_addr) \
70 #  define XCHG_M_R(_addr,_lval)                              \  argument
77            : /*out*/ [global]"+m"(_addr), [local]"+d"(_lval) \
83 #  define XCHG_M_R_with_redundant_LOCK(_addr,_lval) \  argument
84       XCHG_M_R(_addr,_lval)
87 #  define XCHG_M_R(_addr,_lval)                              \  argument
95         : /*in*/  "r"(&_addr), "r"(_lval)                    \
99 #  define XCHG_M_R_with_redundant_LOCK(_addr,_lval) \  argument
100       XCHG_M_R(_addr,_lval)
105 #    define XCHG_M_R(_addr,_lval)                                           \  argument
108           while ((tmp = *(int*)(& _addr)),                                  \
109                  ! __sync_bool_compare_and_swap((int*)&_addr, tmp, _lval))  \
116 #    define XCHG_M_R(_addr,_lval) \  argument
117         do { int tmp = *(int*)(& _addr); \
118              *(int*)(& _addr) = (_lval); \
122 #  define XCHG_M_R_with_redundant_LOCK(_addr,_lval) \  argument
123       XCHG_M_R(_addr,_lval)