// lsbit is left => revert bits
#undef r
#define r(b)                                                                                                         \
	((~b & 128) >> 7) + ((~b & 64) >> 5) + ((~b & 32) >> 3) + ((~b & 16) >> 1) + ((~b & 8) << 1) + ((~b & 4) << 3) + \
		((~b & 2) << 5) + ((~b & 1) << 7)