51 				 _pfx "value too large for the field"); \
59  * FIELD_MAX() - produce the maximum value representable by a field
60  * @_mask: shifted mask defining the field's length and position
62  * FIELD_MAX() returns the maximum value that can be held in the field
72  * FIELD_FIT() - check if value fits in the field
73  * @_mask: shifted mask defining the field's length and position
74  * @_val:  value to test against the field
86  * @_mask: shifted mask defining the field's length and position
87  * @_val:  value to put in the field
100  * @_mask: shifted mask defining the field's length and position
103  * FIELD_GET() extracts the field specified by @_mask from the
116 static __always_inline u64 field_multiplier(u64 field)  in field_multiplier()  argument
118 	if ((field | (field - 1)) & ((field | (field - 1)) + 1))  in field_multiplier()
120 	return field & -field;  in field_multiplier()
122 static __always_inline u64 field_mask(u64 field)  in field_mask()  argument
124 	return field / field_multiplier(field);  in field_mask()
126 #define field_max(field)	((typeof(field))field_mask(field))  argument
128 static __always_inline __##type type##_encode_bits(base v, base field)	\
130 	if (__builtin_constant_p(v) && (v & ~field_mask(field)))	\
132 	return to((v & field_mask(field)) * field_multiplier(field));	\
135 					base val, base field)		\
137 	return (old & ~to(field)) | type##_encode_bits(val, field);	\
140 					base val, base field)		\
142 	*p = (*p & ~to(field)) | type##_encode_bits(val, field);	\
144 static __always_inline base type##_get_bits(__##type v, base field)	\
146 	return (from(v) & field)/field_multiplier(field);		\