ObjFW  Check-in [4b0f1639b4]

	    "bswap	%%eax\n\t"
	    "bswap	%%edx\n\t"
	    "xchgl	%%eax, %%edx"
	    : "=A"(i)
	    : "0"(i)
	);
#else
	i = (uint64_t)of_bswap32_nonconst(i & 0xFFFFFFFF) << 32 |
	    of_bswap32_nonconst(i >> 32);
	i = (uint64_t)of_bswap32_nonconst((uint32_t)(i & 0xFFFFFFFF)) << 32 |
	    of_bswap32_nonconst((uint32_t)(i >> 32));
#endif
	return i;
}

#ifdef __GNUC__
# define of_bswap16(i) \
	(__builtin_constant_p(i) ? of_bswap16_const(i) : of_bswap16_nonconst(i))