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| ANSI Common Lisp 15 Arrays 15.2 Dictionary of Arrays
15.2.34 bit-and, bit-andc1, bit-andc2, bit-eqv, bit-ior, bit-nand, bit-nor, bit-not, bit-orc1, bit-orc2, bit-xor | Function
  Syntax:
  bit-and bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-andc1 bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-andc2 bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-eqv bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-ior bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-nand bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-nor bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-orc1 bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-orc2 bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-xor bit-array1 bit-array2 `&optional` opt-arg | resulting-bit-array
  bit-not bit-array `&optional` opt-arg resulting-bit-array Arguments and Values: bit-array, bit-array1, bit-array2 - a bit array. Opt-arg - a bit array, or t, or nil. The default is nil. Bit-array, bit-array1, bit-array2, and opt-arg (if an array) must all be of the same rank and dimensions. resulting-bit-array - a bit array. Description: These functions perform bit-wise logical operations on bit-array1 and bit-array2 and return an array of matching rank and dimensions, such that any given bit of the result is produced by operating on corresponding bits from each of the arguments. In the case of bit-not, an array of rank and dimensions matching bit-array is returned that contains a copy of bit-array with all the bits inverted. If opt-arg is of type `(array bit)` the contents of the result are destructively placed into opt-arg. If opt-arg is the symbol t, bit-array or bit-array1 is replaced with the result; if opt-arg is nil or omitted, a new array is created to contain the result. The next figure indicates the logical operation performed by each of the functions.
  Bit-wise Logical Operation
  Function | Operation
  --- | ---
  bit-and | and
  bit-eqv | equivalence (exclusive nor)
  bit-not | complement
  bit-ior | inclusive or
  bit-xor | exclusive or
  bit-nand | complement of bit-array1 and bit-array2
  bit-nor | complement of bit-array1 or bit-array2
  bit-andc1 | and complement of bit-array1 with bit-array2
  bit-andc2 | and bit-array1 with complement of bit-array2
  bit-orc1 | or complement of bit-array1 with bit-array2
  bit-orc2 | or bit-array1 with complement of bit-array2
  Examples:
       (bit-and (setq ba #*11101010) #*01101011)  #*01101010
       (bit-and #*1100 #*1010)  #*1000
       (bit-andc1 #*1100 #*1010)  #*0010
       (setq rba (bit-andc2 ba #*00110011 t))  #*11001000
       (eq rba ba)  true
       (bit-not (setq ba #*11101010))  #*00010101
       (setq rba (bit-not ba
                           (setq tba (make-array 8
                                                 :element-type 'bit))))
       #*00010101
       (equal rba tba)  true
       (bit-xor #*1100 #*1010)  #*0110
See Also: lognot, logand Allegro CL Implementation Details: None.

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