162 static __always_inline u64 field_multiplier(u64 field)  in field_multiplier()  argument
164 	if ((field | (field - 1)) & ((field | (field - 1)) + 1))  in field_multiplier()
166 	return field & -field;  in field_multiplier()
168 static __always_inline u64 field_mask(u64 field)  in field_mask()  argument
170 	return field / field_multiplier(field);  in field_mask()
172 #define field_max(field)	((typeof(field))field_mask(field))  argument
174 static __always_inline __##type type##_encode_bits(base v, base field)	\
176 	if (__builtin_constant_p(v) && (v & ~field_mask(field)))	\
178 	return to((v & field_mask(field)) * field_multiplier(field));	\
181 					base val, base field)		\
183 	return (old & ~to(field)) | type##_encode_bits(val, field);	\
186 					base val, base field)		\
188 	*p = (*p & ~to(field)) | type##_encode_bits(val, field);	\
190 static __always_inline base type##_get_bits(__##type v, base field)	\
192 	return (from(v) & field)/field_multiplier(field);		\