70 				 _pfx "value too large for the field"); \
79  * FIELD_MAX() - produce the maximum value representable by a field
80  * @_mask: shifted mask defining the field's length and position
82  * FIELD_MAX() returns the maximum value that can be held in the field
92  * FIELD_FIT() - check if value fits in the field
93  * @_mask: shifted mask defining the field's length and position
94  * @_val:  value to test against the field
106  * @_mask: shifted mask defining the field's length and position
107  * @_val:  value to put in the field
120  * @_mask: shifted mask defining the field's length and position
123  * FIELD_GET() extracts the field specified by @_mask from the
136 static __always_inline u64 field_multiplier(u64 field)  in field_multiplier()  argument
138 	if ((field | (field - 1)) & ((field | (field - 1)) + 1))  in field_multiplier()
140 	return field & -field;  in field_multiplier()
142 static __always_inline u64 field_mask(u64 field)  in field_mask()  argument
144 	return field / field_multiplier(field);  in field_mask()
146 #define field_max(field)	((typeof(field))field_mask(field))  argument
148 static __always_inline __##type type##_encode_bits(base v, base field)	\
150 	if (__builtin_constant_p(v) && (v & ~field_mask(field)))	\
152 	return to((v & field_mask(field)) * field_multiplier(field));	\
155 					base val, base field)		\
157 	return (old & ~to(field)) | type##_encode_bits(val, field);	\
160 					base val, base field)		\
162 	*p = (*p & ~to(field)) | type##_encode_bits(val, field);	\
164 static __always_inline base type##_get_bits(__##type v, base field)	\
166 	return (from(v) & field)/field_multiplier(field);		\