__swap32_x        123 sys/endian.h   	__uint32_t __swap32_x = (x);					\
__swap32_x        125 sys/endian.h   	__builtin_constant_p(x) ? __swap32gen(__swap32_x) :		\
__swap32_x        126 sys/endian.h   	    __swap32md(__swap32_x);					\