lispdoc - results for mask-field

(mask-field bytespec integer)
Setf: The first argument is a byte specifier. The second is any place form acceptable to SETF. Replaces the specified byte of the number in this place with bits from the corresponding position in the new value.
Function: Extract the specified byte from integer, but do not right justify result.
 Mentioned in:
CLtL2 - 12.8. Byte Manipulation Functions
CLtL2 - 7.2. Generalized Variables
HyperSpec - Accessor MASK-FIELD