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

    Purpose:        Perform logical exclusive OR of two integers
    Format:         opcode mask.rx,dst.mx                       ;2 operand
                    opcode mask.rx,src.rx,dst.rx                ;3 operand
    Operation:      dst = dst XOR mask                          ;2 operand
                    dst = src XOR mask                          ;3 operand
    C. Codes:       N = {dst LSS 0}, Z = {dst EQL 0}, V = 0, C = C
    Exceptions:     None
    Opcodes:        88    XORB2    Exclusive OR byte, 2 operand
                    89    XORB3    Exclusive OR byte, 3 operand
                    A8    XORW2    Exclusive OR word, 2 operand
                    A9    XORW3    Exclusive OR word, 3 operand
                    C8    XORL2    Exclusive OR long, 2 operand
                    C9    XORL3    Exclusive OR long, 3 operand
    Description:    In 2 operand format, dst is XORed with mask and dst
                    is replaced by the result. In 3 operand format, src
                    is XORed with mask and dst is replaced by the result.