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

    Purpose:        Add one and branch - increment integer loop count
                    and loop
    Format:         opcode limit.rl,index.ml,displ.bb
    Operation:      index = index + 1; if {{AOBLSS} and {index LSS
                    limit}} or {{AOBLEQ} and {index LEQ limit}} then
                    PC = PC + SEXT (displ)
    C. Codes:       N = {index LSS 0}, Z = {index EQL 0},
                    V = {integer overflow}, C = C
    Exceptions:     Integer overflow
    Opcodes:        F2    AOBLSS   Add one, branch less than
                    F3    AOBLEQ   Add one, branch less or equal