VMS Help MACRO, VAX MACRO Assembler, Instructions, BICxx  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Purpose:        Bit clear - perform complemented AND of two integers
    Format:         opcode mask.rx,dst.mx                  ;2 operand
                    opcode mask.rx,src.rx,dst.rx           ;3 operand
    Operation:      dst = dst AND {NOT mask}               ;2 operand
                    dst = src AND {NOT mask}               ;3 operand
    C. Codes:       N = {dst LSS 0}, Z = {dst EQL 0}, V = 0, C = C
    Exceptions:     None
    Opcodes:        8A    BICB2    Bit clear byte, 2 operand
                    8B    BICB3    Bit clear byte, 3 operand
                    AA    BICW2    Bit clear word, 2 operand
                    AB    BICW3    Bit clear word, 3 operand
                    CA    BICL2    Bit clear long, 2 operand
                    CB    BICL3    Bit clear long, 3 operand
    Description:    In 2 operand format, dst is ANDed with the ones
                    complement of mask and dst is replaced by the result.
                    In 3 operand format, src is ANDed with the ones
                    complement of mask and dst is replaced by the result.